Dissertations / Theses: 'Modular Manufacturing'

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Müller, Luis Antonio 1969. "Modular semiconductor test, assembly & packaging manufacturing equipment design." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9840.

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Cosic, Matea, and Viktor Rochowiak. "Designing an assembly line for modular house manufacturing : Increased efficiency of the manufacturing process." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Industriell organisation och produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40717.

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Having an efficient production is vital for companies that are facing highly demanding customers along with tough competition. In addition, the production layout has a significant impact on the production efficiency hence it the choice of production layout is an important question to consider. A common production layout is the assembly line whereas companies with products that are not adequate for assembly line production; are seeing advantages of working with assembly lines. An example is the modular house manufacturing industry. Therefore, the purpose of the study was to investigate how an assembly line for modular house manufacturing and the related material supply may be designed in order to increase the overall efficiency of the manufacturing process. A single case study has been conducted at Zenergy AB, Skillingaryd. Empirical data has been collected through various sources; interviews, observations and document studies. In addition, a literature review has been conducted. The theoretical framework and empirical data has been established by the means of pattern matching and further on data analysis was done thus the results of the study were acquired. To conclude, it is shown in the results that implementation of an assembly line for modular house manufacturing can be beneficial despite the fact that its products are not adequate for assembly line production. Further on, there are three main critical factors to consider during the assembly line design process for modular house manufacturing. The critical factors are; line balancing, dry time and bulky materials. The critical factors will in turn have a significant impact on the choice of the assembly line production layout and the related material supply.

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Kotilainen, Markku Sami Antero 1972. "Design and manufacturing of modular self-compensating hydrostatic journal bearings." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/45497.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
Includes bibliographical references (p. 241-244).
In order to carry a load, a multi recess hydrostatic bearing supplied with a single pressure source requires compensation devices. These devices are also known as restricters and they allow the recess pressures to differ from each other. These devices, when properly selected and tuned, can deliver excellent bearing performance. However, these devices add to the complexity of the bearing and they are sensitive to manufacturing errors. These devices must often be tuned specifically for each bearing and are therefore expensive to install and maintain. Self-regulating or self-compensating bearings do not need any external devices to achieve load-carrying capability and they do not add to the total degrees of freedom of the system. However, in many cases the proposed designs require multiple precision manufacturing steps such as EDM and grinding in addition to precision shrink fit. In this work a self-compensating design, which eliminates all but one precision-manufacturing step, was manufactured and tested. Novel manufacturing methods for different sizes were introduced. The test results were compared with theoretical results and satisfactory agreement was achieved. The bearing sensitivity to manufacturing errors was analyzed computationally using statistical methods. These results were used to show that the introduced manufacturing methods are more cost effective than the applicable precision or semi precision manufacturing methods even when the performance variation is taken into account. When hydrostatic journal bearing is rotated hydrodynamic effects are introduced. Often, these effects are ignored by assuming them to be insignificant. Two non-dimensional parameters were derived to estimate the significance of the hydrodynamic effects and limits to these parameters were searched numerically. Design theory, along with first order equations to estimate bearing performance was developed.
by Markku Sami Antero Kotilainen.
Ph.D.

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Cho, Tae Ho. "A hierarchical, modular simulation environment for flexible manufacturing system modeling." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186144.

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Computer simulation is one of the most widely used techniques in manufacturing systems study. The value of simulation increases constantly due to improvements in computing power. However models of large-scale systems tend to be very complex, and writing simulation programs to execute them can be an arduous task. Rapid modeling of such systems can play a significant role in the selecting manufacturing strategy. This dissertation deals with the design and implementation of tools that aid in such modeling activity by identifying some of the problems that occur frequently in the modeling of flexible manufacturing systems (FMS). This set of tools, collectively called the hierarchical modular modeling environment (HMME), is designed and implement by extending DEVS(Discrete EVent System Specification)-Scheme. The problems identified are in the field of model interconnections, embedding expert systems in models, model structuring and simulation display. An example, of operation overlapping strategy in a hierarchical FMS, demonstrates the utility of the environment. Although developed for FMS simulation, this modeling aid is applicable to many other domains of knowledge-based systems and intelligent control.

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Karlsson, Johan. "Utvärdering av ModFix : Byggnation av modulära fixturer integrerat i Process Simulate." Thesis, University of Skövde, School of Technology and Society, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-4211.

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Syftet med detta projekt är att utvärdera ModFix som verktyg och arbetsmetoden för att skaps fixturer med ModFix. ModFix är ett verktyg som är integrerad i Siemens simuleringsmiljön Process Simulate och används för att skapa modulära fixturer. Målsättningen med arbetsmetoden där fixturer skapas med ModFix är att ledtiden och mantimmarna för att skapa fixturer ska reduceras med 50 % i jämförelse med Volvo Cars nuvarande arbetsmetod där fixturer skapas med Catia V5.

ModFix-verktyget består av tre funktioner. Dessa funktioner är; Configuration Administrator, Fixture Designer och Modular Fixture Mapping Report. Configuration Administrator är ModFix´s administrationsverktyg och används för att skapa de fixturbaser och fixturkonfigurationer som senare används för att skapa modulära fixturer med Fixture Designer. Fixture Designer används för att skapa kompletta modulära fixturer. Modular Fixture Mapping Report är den funktion som används för att generera en rapport som specificerar mappningen mellan de fixturenheterna och de referenspunkter (PLPs/”frames”) där produkten fixeras.

Fördelarna med arbetsmetoden där fixturer skapas med ModFix i jämförelse med den nuvarande arbetsmetoden är bland annat att fixturen hela tiden befinner sig i samma utvecklingsmiljö och den extra frihetsgraden att roboten simuleras parallellt med att fixturen skapas för att kunna undvika kollisioner. Även att ModFix automatiskt ger förslag på fixturkonfigurationslösningar för att fästa fixturelementen mot fixturbasen och att fixturer som skapas med ModFix är moduluppbyggda av standardkomponenter är två andra fördelar med arbetsmetoden där fixturer skapas med ModFix jämfört med då fixturer skapas med den nuvarande arbetsmetoden.

Resultatet av detta projekt visar att ModFix kan reducera mantimmarna betydligt mer än 50 % för att skapa fixturer jämfört med att skapa fixturer med den nuvarande arbetsmetoden. Ledtiden för att skapa fixturer med ModFix reduceras ännu mer än mantimmarna jämfört med då fixturer skapas med den nuvarande arbetsmetoden där fixturer skapas med Catia V5.

The aim of this project is to evaluate ModFix and its work method used to create fixtures with ModFix. ModFix is integrated in the simulation environment Process Simulate, provided by Siemens. ModFix is used to create modular fixtures. The objective with the work method where fixtures are created in ModFix is to reduce lead-time and man-time with 50 % in comparison with the current work method at Volvo Cars where fixtures are created in Catia V5.

The tool ModFix consists of three functions. These functions are; Configuration Administrator, Fixture Designer and Modular Fixture Mapping Report. Configuration Administrator is the administration tool in ModFix and is used to create the fixture bases and the fixture configurations as subsequently are used to create modular fixtures with Fixture Designer. Fixture Designer is used to create complete modular fixtures. The Modular Fixture Mapping Report function is used to create a report that specifies the mapping between the fixture units and the reference points (PLPs/frames) where the product is fixed.

The benefits with the work method where fixtures are created with ModFix in comparison with the current work method includes that the fixture constantly stays in the same development environment and the possibility to simulate the robot in parallel with creating the fixture to avoid collisions. That ModFix automatic gives suggestions of fixture configuration solutions to attach the fixture element to the fixture base and that fixtures created with ModFix are modular built up of standard components are two other benefits with the work method where fixtures are created with ModFix in comparison with the current work method.

The result of this project shows that ModFix can reduce the man-time significant more than 50 % to create fixtures with ModFix in comparison with the current work method where fixtures are created in Catia V5. The lead-time can be reduced even more than the man-time when using ModFix to create fixtures in comparison with the current work method.

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Ariffin, Saparudin bin. "Modelling and simulation in support of the design and construction of modular machine control system." Thesis, Loughborough University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336507.

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Wallmark, Toste Jawi. "Product architecture network : representing modular product families for mass customization /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?IEEM%202005%20WALLMA.

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Kul, Mustafa Cihangir. "Design, Development And Manufacturing Of An All Terrain Modular Robot Platform." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611858/index.pdf.

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The aim of this thesis is to create a flexible multi-purpose modular all terrain robot platform, which has the potential to be used in commercial applications as well as in education and research. In developing this robot platform, it is aimed to use readily available commercial products as much as possible in order to keep the cost of the product low, increase maintainability, and benefit from the improvements made to these components in time. The modularity is attained by designing a two wheeled base module which is autonomous on its own. This base module is composed of two wheels where, the motors located inside these wheels. It is shown that the proposed base module facilitates the configuration of various robots to suit the needs of diverse applications. Detailed design and manufacturing of one of various possible configurations is presented. Performance tests are conducted on this robot configuration and effectiveness of the proposed modular approach is justified.

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Alkahlan, Bandar Suliman. "Integrated Design and Manufacturing [IDM] Framework for the Modular Construction Industry." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/81418.

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If we look at the construction industry, particularly the modular single-family construction industry, we often see that the design stage is distinctly separate from the construction and fabrication stages. This separation has been occurring for some time now, however, there is often a noticeable lack of understanding of the constraints in linking architectural design to modular construction for single-family housing. In addition, no framework exists which seeks to support overcoming these constraints for the architectural design process while simultaneously bringing knowledge of fabrication, materials selection, and modular construction to the early stage of design. Also, there is a lack of knowledge of fabrication and modular construction constraints by many architects. This research intended to focus upon mapping the design and manufacturing processes for a specific scale of projects: residential single-family units. The research also aimed to understand the relationships among design, the role of emerging technologies, and manufacturing within the modular home construction industry in order to develop a design process that is based upon mass customization, rather than mass production. Thus, qualitative research methods based upon a grounded theory approach were used for evaluating, capturing, and structuring knowledge. To achieve the greatest possible amount of useful information, case studies of on-site visits to manufactured housing production facilities and structured, in-depth, open-ended interviews of architects, engineers, production managers, business managers, and other knowledge-holders within the manufactured modular housing industry were performed. The aim of this research was to map the design and modular homes manufacturing processes in an effort to better understand the relationships between these two domains. The Integration Definition (IDEF0) for Function Modeling was used as a graphical presentation technique. The goal of using such a graphical technique was, first, to understand and analyze the functions of the existing "As-is" design-manufacture communication process; and second, to enhance and improve the communication and productivity performances among people working in the design, manufacturing, and production sectors. Using this graphical modeling method assisted with mapping the design and modular manufacturing processes, including organizations, teams, decisions, actions, and activities. Through this mapping process, strategies to improve the emergent relationships were proposed as a new "To-be" design and manufacturing framework for modular single-family housing projects.
Ph. D.

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Keyvani, Ali. "Modular Fixture Design for BIW Lines Using Process Simulate." Thesis, University West, Department of Engineering Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-1613.

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The unchangeable need of securing and locating parts during different manufacturing processes turned the fixtures to key elements in many part production industries. The iterations between design engineers and manufacturing planners because of late collision detection of the part/fixtures with robots cost a lot of time and money. The lead-time can be reduced by developing tools and/or methods for early verification of the fixtures during the simultaneous engineering phase. Different aspects of fixture designing, modeling and simulating is investigated as a base step to recognize the best practice work to do fixture planning in Process Simulate integrated PLM environment. The aim of the project is to use Process Simulate to design and validate modular fixtures at the same time and in a single environment. It also aims to investigate the possibility of adding kinematics, sensors, and actuating signals to the fixtures and utilize them to model the fixture behavior in a larger simulation study. The project narrows down its focus on the fixtures designed for robotic applications specifically in Automotive Body in White lines without losing generality. The document type stated at the title page and in the header of this page is master thesis work.

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Wan, S. K. "The design of modular cell controllers for flexible automated batch manufacturing facilities." Thesis, University of Huddersfield, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379051.

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Ng, Hok Chuen. "An integrated design, simulation and programming environment for modular manufacturing machine systems." Thesis, De Montfort University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414936.

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Zhu, Ji 1964. "Multiple choice modular design when linear and separable constraints are present." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276938.

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In this thesis we give two extensions to the multiple choice modular design problem. In the first case, we consider the situation that parts are purchased from different vendors. In the second case, we consider the situation that linear and separable constraints are present in our model. We propose a heuristic for solving each of the problems. Some computational results are included.

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Pisano, Giorgia. "Modular Design Approach as Enabler for Operational Efficiency of Closed Loop Manufacturing Systems." Thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174145.

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The possibility of manufacturing like-new products by using only a fraction of the energy and raw materials that would actually be required to make the same new products is investigated. The field of recovering and adding value, besides restoring value, to already-used products could be environmental as well as economic opportunity for the manufacturing industry. By aiming at resources conservation in the supply chain, the manufacturing industry might, on one hand, significantly reduce the impact of their production practices on the environment, both by reducing the waste destined to the landfill and by decreasing the level of procurement of raw materials that inevitably leads to exhaust the non-renewable energy sources; on the other hand, it might close the loop on the raw materials, consistently reducing internal costs. The reactive response to the environmental legislations might not be the most successful solution. A proactive action that is intentionally restorative by design is desirable in the industry in order to be more environmentally conscious and profitable. Producing by re-producing is advised as the new adventure to embark on. This Master Thesis aims to present possible solutions to tackle the problem of resources’ scarcity on our earth, by starting from suggesting to avoid manufacturing what is not strictly needed, and to render this process as profitable as possible. Recovery activities, which include reuse, remanufacturing and recycling, are considered as a starting point to enable the revolutionary process of Resource Conservative Manufacturing (ResCoM). Since the majority of today’s products are not conceived for reuse and/or remanufacturing, the revolution should start from the design phase. The approach that the present thesis proposes is based on the concept of modularity exploited in the context of DfX (e.g. Design for Environment, Disassembly, and Remanufacturing). The modular design methodology, alongside ResCoM principles, might lead to the manufacturing of products with several lifecycles, whose number can be estimated at the design stage, and entails the planned recollection of the product at a defined time in order to remanufacture what is needed to get an upgraded and perfectly functional product that could be sold in the same or different markets.This thesis concludes with a case study-based example of the methodology application that lies in the context of closed loop manufacturing systems. Closed loop dynamics are at the basis of the entire investigation. The design features of a fully modular semi-commercial washing machine, presented in the case study, show this methodology’s benefits achievable in the context of remanufactured products in a closed loop supply chain.

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Cabrejos, Paredes Mario Roberto, and Roman Kevid Arturo Gutierrez. "Efficiency improvement in a manufacturing textile company: a peruvian case." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/655035.

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La implementación de la metodología y la filosofía Lean Manufacturing en la industria de la confección funciona como un método para mejorar la eficiencia y la productividad. Este estudio demuestra la aplicación de herramientas de ingeniería industrial en una MIPYME de fabricación de ropa en combinación con los principios de Lean Manufacturing para resolver problemas en el área de confección. Las herramientas de la ingeniería industrial, como el estudio de métodos, el rediseño de layout y el balance de línea, nos brindan los medios para visualizar los problemas relacionados con la producción de una prenda, como exceso de inventario en proceso, distribución incorrecta de la planta que provocó movimientos innecesarios y retrasos en el cumplimiento de la producción debido a métodos de trabajo ineficientes. Después de evaluar una MIPYME de confección en Perú, los resultados mostraron que todos estos problemas estaban presentes. Finalmente, se propone y simula un modelo de solución utilizando las herramientas mencionadas anteriormente con el fin de optimizar el proceso productivo. Los resultados muestran una mejora del 7,38% en eficiencia.
The implementation of Lean Manufacturing methodology and philosophy in the garment industry works as a method to improve efficiency and productivity. This study demonstrates the application of industrial engineering tools in a clothing manufacturing SME in combination with Lean Manufacturing principles to solve problems in the sewing section. The industrial engineering tools, such as method study, the rearrangement of layout and the line balance, gives us the means to visualize the problems related to the production of a garment, such as excess inventory in the storage and production process, incorrect plant distribution that caused unnecessary movements and delays in production compliance due to inefficient work methods. After evaluating a garment SME in Peru, the results showed that all these problems were present. Finally, a solution model is proposed and simulated using the previously mentioned tools in order to optimize the production process. The results show an improvement of 7.38% in efficiency
Trabajo de investigación

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Chen, Jing. "Development of an object-oriented framework for modular chemical process simulation with semiconductor manufacturing applications." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3535.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.
Thesis research directed by: Chemical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Sun, Xizhi. "An integrated framework for developing generic modular reconfigurable platforms for micro manufacturing and its implementation." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/3493.

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The continuing trends of miniaturisation, mass customisation, globalisation and wide use of the Internet have great impacts upon manufacturing in the 21st century. Micro manufacturing will play an increasingly important role in bridging the gap between the traditional precision manufacturing and the emerging technologies like MEMS/NEMS. The key requirements for micro manufacturing in this context are hybrid manufacturing capability, modularity, reconfigurability, adaptability and energy/resource efficiency. The existing design approaches tend to have narrow scope and are largely limited to individual manufacturing processes and applications. The above requirements demand a fundamentally new approach to the future applications of micro manufacturing so as to obtain producibility, predictability and productivity covering the full process chains and value chains. A novel generic modular reconfigurable platform (GMRP) is proposed in such a context. The proposed GMRP is able to offer hybrid manufacturing capabilities, modularity, reconfigurablity and adaptivity as both an individual machine tool and a micro manufacturing system, and provides a cost effective solution to high value micro manufacturing in an agile, responsive and mass customisation manner. An integrated framework has been developed to assist the design of GMRPs due to their complexity. The framework incorporates theoretical GMRP model, design support system and extension interfaces. The GMRP model covers various relevant micro manufacturing processes and machine tool elements. The design support system includes a user-friendly interface, a design engine for design process and design evaluation, together with scalable design knowledge base and database. The functionalities of the framework can also be extended through the design support system interface, the GMRP interface and the application interface, i.e. linking to external hardware and/or software modules. The design support system provides a number of tools for the analysis and evaluation of the design solutions. The kinematic simulation of machine tools can be performed using the Virtual Reality toolbox in Matlab. A module has also been developed for the multiscale modelling, simulation and results analysis in Matlab. A number of different cutting parameters can be studied and the machining performance can be subsequently evaluated using this module. The mathematical models for a non-traditional micro manufacturing process, micro EDM, have been developed with the simulation performed using FEA. Various design theories and methodologies have been studied, and the axiomatic design theory has been selected because of its great power and simplicity. It has been applied in the conceptual design of GMRP and its design support system. The implementation of the design support system is carried out using Matlab, Java and XML technologies. The proposed GMRP and framework have been evaluated through case studies and experimental results.

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Collins, Donovan (Donovan Scott). "Feature-based investment cost estimation based on modular design of a continuous pharmaceutical manufacturing system." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66063.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering; in conjunction with the Leaders for Global Operations Program at MIT, June 2011.
"June 2011." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 72-73).
Previous studies of continuous manufacturing processes have used equipment-factored cost estimation methods to predict savings in initial plant investment costs. In order to challenge and validate the existing methods of cost estimation, feature-based cost estimates were constructed based on a modular process design model. Synthesis of an existing chemical intermediate was selected as the model continuous process. A continuous process was designed that was a literal, step by step, translation of the batch process. Supporting design work included process flow diagrams and basic piping and instrumentation diagrams. Design parameters from the process model were combined with feature-based costs to develop a series of segmented cost estimates for the model continuous plant at several production scales. Based on this analysis, the continuous facility seems to be intrinsically less expensive only at a relatively high production scale. Additionally, the distribution of cost areas for the continuous facility differs significantly from the distribution previous assumed for batch plants. This finding suggests that current models may not be appropriate for generating cost estimates for continuous plants. These results should not have a significant negative impact on the value proposition for the continuous manufacturing platform. The continuous process designed for this project was not optimized. Therefore, this work reiterates that the switch to continuous must be accompanied with optimization and innovation in the underlying continuous chemistry.
by Donovan Collins.
S.M.
M.B.A.

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Martins, Ricardo Wagner Campos. "Uma arquitetura modular para controle de FMS." Universidade Federal de São Carlos, 2005. https://repositorio.ufscar.br/handle/ufscar/316.

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Made available in DSpace on 2016-06-02T19:05:17Z (GMT). No. of bitstreams: 1 DissRWCM.pdf: 3820933 bytes, checksum: 0defe423c2e4d7d5969558fc1677062d (MD5) Previous issue date: 2005-08-26
In order to attend the market quickly, a company need to have flexibility and to change its production line, to assist to the production of personalized products, to change the raw material or, even, the conception of the product like in an automatic system of manufacture. Administration of processes, industrial automation and IT (Information Technology) are essential to guarantee not only the companies, competitiveness but their survival inside of this scenery. The larger interest among the automatic systems of manufacture in this work is the flexible manufacture system (FMS), for its inclusion and complexity and, consequently, its control and the variety of architectures, as the centralized, the hierarchical, the heterarchical, the hybrid and, finally the multi - agent, therefore the main focus of this work will be the control system of a FMS. So one of the architecture alternatives, is the proposal using a system of hybrid control, because it allows the communication among levels, by sidelong, and the modules involved in the production process and factory ground control, so it will be possible, to determine which are the instances or moments so of decision, describing the used functions, as well as the treated information. To make possible the modeling modules are used: manager, selective and movement controller facilitating the construction of a structured algorithm aiming at the detail of the process mapping of communication about the actions unchained in the factory ground.
Para uma empresa responder mais rapidamente ao mercado, é importante ter flexibilidade e poder mudar sua linha de produção facilmente, para atender à fabricação de produtos personalizados, alterar a matéria-prima ou, até mesmo, a concepção do produto como em um sistema automático de manufatura. Gerenciamento de processos, automação industrial e TI (Tecnologia da Informação) são essenciais para garantir não somente competitividade das empresas, mas sua sobrevivência dentro deste cenário. Dentre os sistemas automáticos de manufatura que têm sido abordados, o de maior interesse para o escopo deste trabalho é o sistema flexível de manufatura (FMS), por sua abrangência e complexidade e, conseqüentemente, seu controle. Há uma variedade de arquiteturas de controle, como a centralizada, a hierárquica, a heterárquica, a híbrida e, finalmente a multi agente, com vantagens e desvantagens em relação à facilidade de modelagem, implementação e desempenho. Como proposta deste trabalho é estudada uma das alternativas de arquitetura, utilizando um sistema de controle híbrido, pelo fato do mesmo permitir a comunicação entre níveis, tanto lateralmente, como com os módulos envolvidos no processo de fabricação e controle de chão de fábrica. Será possível com isto, determinar quais são as instâncias ou momentos de tomada de decisão, descrevendo as funções utilizadas, bem como as informações tratadas. Para viabilizar a modelagem utilizam-se módulos: gerenciador, seletivo e controlador de movimentação facilitando a construção de um algoritmo estruturado objetivando o detalhamento do mapeamento do processo de comunicação das ações desencadeadas no chão de fábrica.

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Goyal, Arvind. "APPLICATION OF ARTIFICIAL NEURAL NETWORK TECHNIQUES FOR DESIGN OF MODULAR MINICELL CONFIGURATIONS." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/508.

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Artificial neural networks, so far, have not been used for designing modular cells. Therefore, Self-organizing neural network (SONN) is used in the present research to design minicell-based manufacturing system. Two previously developed methods were studied and implemented using SONN model. Results obtained are compared with previous results to analyze the effectiveness of SONN in designing minicells. A new method is then developed with the objective to design minicells more effectively and efficiently. Results of all three methods are compared using machine-count and materialhandling as performance measuring criteria to find out the best method

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Tezcanlı, Eda Seçkin Yavuz. "An analytical surver on customization at modular systems in the context of industrial design/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/endustriurunleritasarimi/T000409.pdf.

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Perini, Francesco. "Structural design, manufacturing and testing of the new wing for the CSIR's Modular UAS in composite materials." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4772/.

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In the framework of an international collaboration with South Africa CSIR, the structural design, manufacturing and testing of the new wing for the Modular UAS in composite materials has been performed.

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Greenwood, Thomas A. "A modular supply chain architecture for low-volume high-mix surface mount technology manufacturers." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84340.

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Thesis (S.M.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; in conjunction with the Leaders for Manufacturing Program at MIT, 2002.
Includes bibliographical references (p. 109).
by Thomas A. Greenwood.
S.M.

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Kenger, Patrik. "Module property verification : A method to plan and perform quality verifications in modular architectures." Doctoral thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3965.

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Wu, Hongjian. "Process Modeling and Planning for Robotic Cold Spray Based Additive Manufacturing." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCA026.

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La projection à froid (Cold spray, CS) est une technologie de dépôt de revêtement à l'état solide qui a récemment été appliquée comme processus de fabrication additive (Additive manufacturing, AM) pour fabriquer des composants individuels. Ce procédé potentiel attire de plus en plus de l'attention en raison de ses avantages : efficacité de formage élevée, basse température de travail et absence de changement de phase des matériaux. Ces avantages peuvent permettre à la projection à froid de former des objets de grand volume pour devenir un procédé de fabrication additive efficace. De nos jours, de nouvelles avancées dans la fabrication additive à froid (Cold spray additive manufacturing, CSAM) nécessitent de nouvelles implémentations de processus pour améliorer la précision et la flexibilité de fabrication. Par conséquent, le but de cette étude est d'améliorer la méthode additive utilisant la projection à froid grâce à la modélisation et à la planification du processus robotique CS. Le travail de cette thèse se compose en trois parties.Premièrement, des efforts ont été consacrés à la conception et à la mise en œuvre d'un nouveau cadre pour la technique CSAM. Dans cette partie, un concept de système modulaire est présenté. Ici, le système CSAM actuel est décomposé en différents modules afin de comprendre les relations physiques et fonctionnelles entre les éléments clés de l'ensemble du système. Cette modularité physique et fonctionnelle est une nécessité indispensable pour promouvoir les processus AM hybrides. De nouveaux modules, tels que le module de mesure in-situ, le module inter-processus peuvent être intégrés pour offrir plus de possibilités au processus CS conventionnel. Il est révélé que la modularité du système est adaptée pour révolutionner la méthode et technique CSAM. On peut voir que pour exploiter pleinement le potentiel de cette approche, des efforts sont encore nécessaires pour intégrer et coordonner davantage de technologies à l'aide du cadre modulaire proposé.Deuxièmement, une nouvelle approche est présentée pour simuler le dépôt. Ici, un modèle géométrique tridimensionnel du profil de revêtement basé sur la distribution gaussienne est développé. Le modèle est combiné avec la trajectoire du robot et les paramètres de traitement pour simuler l'évolution des dépôts. En outre, il peut offrir une prédiction précise du profil dans la plate-forme de programmation hors ligne du robot, en particulier dans le cas des effets d'ombre, ce qui permet l'intégration de la programmation du robot avec la simulation pour mieux contrôler le processus de revêtement. Les résultats des vérifications numériques et expérimentales montrent que cette méthode proposée a une bonne précision de prédiction.Enfin, par rapport à la stratégie actuelle de formation de volume basée sur le volume (par exemple, une méthode basée sur la tessellation), cette étude propose une nouvelle stratégie qui prend en compte les caractéristiques et les paramètres cinématiques de la projection à froid pour améliorer la construction de couches stables pour l’obtention de forme 3D. La simulation et les expériences sont menées pour la vérification de la méthode. Les essais comparatives créés par couches ont une meilleure précision de forme que celle des méthodes existantes. Cela implique que la méthode proposée fait de la projection à froid un processus additif efficace pour la création additive de formes 3D
Cold spray (CS) is a solid-state coating deposition technology that has recently been applied as an additive manufacturing (AM) process to fabricate individual components. This potential AM process is attracting more and more attention because of its advantages: high-forming efficiency, low temperature, and no phase changing of materials. These advantages make CS able to form large-volume objects to become an efficient and effective AM process. Nowadays, new advances in cold spray additive manufacturing (CSAM) call for new process implementation to improve the manufacturing accuracy and flexibility. Therefore, the purpose of this study is to enhance CS-based AM through the modeling and planning of the robotic CS process. The work of this thesis consists of three parts.Firstly, efforts have been dedicated to design and implement a new framework for CSAM. In this part, a concept of modular system is presented. Here, the current CSAM system is decomposed into different modules in order to understand the physical and functional relationships between the key elements of the entire system. This physical and functional modularity is an indispensable necessity to promote hybrid AM processes. New modules, such as in-situ measurement module, inter-process module can be integrated into the framework to bring more possibilities to the conventional CS process. It is revealed that system modularity is suitable to revolutionize the CSAM method and conduction. It can be seen that to fully exert the potential of CSAM, efforts are still required to integrate and coordinate more technologies with the help of the proposed modular framework.Secondly, a novel approach is presented to simulate the CS deposition. Here, a three-dimensional geometric model of the coating profile based on Gaussian distribution is developed. The model is combined with robot trajectory and processing parameters to simulate the evolving CS deposits. In addition, it can offer accurate profile prediction in the robot off-line programming platform, especially in case of shadow effects, which enables the integration of robot programming with simulation to better control the coating process. The results of both numerical and experimental verifications show that this proposed method has a good prediction accuracy for practice.At last, compared with the current bulk-based volume-forming strategy (e.g. a tessellation-based method), this study proposes a new spray strategy that considers the characteristics and kinematic parameters of cold spray to enhance stable layer building for 3D shape forming. Both simulation and experiments are conducted for method verification. Layer built benchmarking test objects have better shape accuracy than that of existing methods. This implies that the proposed method makes CS a real and layer-by-layer ready AM process for 3D shape forming

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Shiwakoti, Rochak. "Design and Analysis of Modular Axial Flux Switched Reluctance Motor." ScholarWorks@UNO, 2019. https://scholarworks.uno.edu/td/2680.

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This thesis presents a new modular structure of the axial flux Switched Reluctance Motor (SRM). The design consists of four stator disks with each adjacent disk rotated 30 degrees apart and four rotor disks connected to a common shaft. The proposed design aims to reduce the unwanted radial force, mitigate the torque ripple, and improve the efficiency. The modular structure distributes the radial force and torque strokes along the axial length of the motor, potentially damping the torque pulsation. In addition, the modular structure would deliver the rating power at a lower current level, reducing the overall ohmic loss. Moreover, if a fault occurs on a motor disk or its control unit, the motor would still operate through other disks, increasing the reliability of the system. To verify the effectiveness of the proposed design, the magneto-static and transient performance of the motor are compared with the conventional single layer structure using 3-D Finite-Element (FE) software tool to see that the proposed motor performs better with lower torque ripple and lower radial force than a conventional single layer structure.

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Jonasson, Jack, and Jens Ottosson. "Utveckling av insatsmodul till en Arcam S12 EBM-maskin : För möjliggörande av småskaliga tester med mindre pulveråtgång." Thesis, Mittuniversitetet, Avdelningen för kvalitets- och maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-38227.

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Arbetet behandlar utvecklingsprocessen för en insats till en ARCAM S12 Electron Beam Melting-maskin. Behovet består i att dagens maskin kräver en full tank med tillverk-ningsmaterial för att kunna användas. Den överdrivna materialtillför-seln leder till att maskinen ej kan ses som lämplig för materialforskning, då nya material måste tillverkas i stora satser varav en stor del går som svinn. Målet med arbetet blev därför att utveckla en insats till maskinen, som skulle göra den gångbar att använda vid materialforskning, utan att permanent påverka ursprungsfunktionen. Den utvecklade insatsen har som funktion att sänka materialanvänd-ningen i maskinen, och därigenom göra maskinen applicerbar för materialforskning. Detta genom att minska byggytan och skapa en mer sofistikerad materialmatning än originalutförandets. Materialmatningen är också modulär, på så sätt att mängden materialpulver som matas ut per cykel kan varieras med olika insatser. Under arbetets gång behandlas alla processens steg, från målspecifikat-ionen till det slutgiltiga konstruktionsunderlaget. Projektet startade med en funktionsanalys och uppställande av en målspecifikation. Därefter startade konceptgenereringsprocessen med både kreativa och mer stringenta utvecklingsmetoder. Efter detta genomfördes konceptval med flera strukturerade konceptvalsmetoder. Det valda konceptet modellerades sedan i sin slutgiltiga form i SolidWorks. Via SolidWorks interna ritningssystem ritades även konstruktionsunderlag till insatts-modulen. Projektets resultat är ett färdigt konstruktionsunderlag för en modul som passar i en ARCAM S12 EBM-maskin. Denna modul minskar byggvolymen till 110x110xbygghöjden i millimeter, och likriktar mängden material applicerat mellan lagerna.
This thesis work is focused on the product development of an insert module for an ARCAM S12 Electron Beam Melting machine The need for an insert module comes from the fact that the machine requires a full tank of building material to operate as intended. With concern to the large building volume the original machine cannot be seen as a viable alternative for materials research, because such research often uses expensive experimental materials. The goal for the module is therefore to lower the use of building material, and trough that make the machine viable for materials research without permanently affecting the original function. Another important function of the new module is the possibility to control and synchronize the amount of material dispensed between layers of the build. During the length of the thesis, the entire development process of the module is discussed. From the target specification, to the finished blueprints. The process started with the establishment of a target specification, followed by a phase of concept development containing both creative and stringent methods. After these concepts had been evaluated and culled through structured methods a final concept was selected. This concept was then modeled in Solid Works and technical drawings of the model was made for the blueprint. The result of the thesis work is a finished blueprint for an insert module that fits an ARCAM S12 EBM machine. This module has lowered the build volume to 110x110xthe build height in millimeters, and has the possibility to synchronize the amount of material dispensed between layers.

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Argoud, Ana Rita Tiradentes Terra. "Procedimento para projeto de arranjo físico modular em manufatura através de algoritmo genético de agrupamento." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18145/tde-16052007-182755/.

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O objetivo desta tese foi desenvolver um procedimento para projeto de arranjo físico modular. O procedimento usa um algoritmo genético de agrupamento para gerar módulos de arranjo físico em manufatura. Um módulo é um grupo de máquinas com um fluxo característico. O algoritmo genético de agrupamento (AGA) permite ao usuário especificar a priori o número desejado de módulos (problema de K-agrupamentos), e também trabalhar de forma que o número e formação dos módulos seja uma otimização do problema (problema de agrupamento automático). Uma característica importante do AGA é sua flexibilidade, pois fornece possibilidade ao usuário de dirigir seu raciocínio através da escolha de diferentes codificações do cromossomo, de funções de aptidão para avaliar a qualidade da solução, de medidas de similaridade para comparação de seqüências de operações e de métodos de geração da nova população. Para tal foram desenvolvidos três operadores de cruzamento e quatro operadores de mutação. Os experimentos permitiram avaliar o comportamento do AGA com diferentes operadores e configurações de parâmetros, através do número de vezes em que a melhor solução foi encontrada. Os módulos de arranjo físico gerados pelo AGA e o arranjo físico final da fábrica foram comparados aqueles da principal referência encontrada na bibliografia em projeto de arranjo físico modular. No arranjo físico final da fábrica, elaborado a partir das soluções do AGA, houve importante redução da distância total percorrida pelo conjunto de peças, demonstrando a eficácia do algoritmo genético de agrupamento. Dessa forma, os resultados apontaram o algoritmo genético de agrupamento como uma alternativa à geração de módulos de arranjo físico em projeto de arranjo físico modular.
The objective of this thesis was the development of a procedure to the design of modular facility layouts. The procedure uses a clustering genetic algorithm to generate layout modules. A module is a group of machines with a specific patterned flow. The clustering genetic algorithm (CGA) allows the specification of the desired number of modules (K-grouping problem) and also the optimization of the number of modules (automatic clustering problem). The genetic algorithm is very flexible and the user can guide his reasoning. It supplies different options of chromosome encoding, generation of the initial population, fitness function to evaluate the solution quality, different similarity measures for comparison of operation sequences and methods for generation of the new population. Three crossover operators and four mutation operators have been developed. The experiments have allowed evaluating the behavior of the CGA with different operators and parameters configurations, through the number of times in which the best solution was found. The layout modules generated by the CGA and the block layout were compared with the main reference which was found in literature in the design of modular facility layouts. In the block layout elaborated from the solutions of the CGA there was an important reduction of the total distance traveled by the set of parts, demonstrating the effectiveness of the clustering genetic algorithm. The results indicated that the clustering genetic algorithm is an alternative for generation of layout modules in the design of modular facility layouts.

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Farhan, Uday H. "An integrated computer-aided modular fixture design system for machining semi-circular parts." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/555.

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Productivity is one of the most important factors in manufacturing processes because of the high level of market competition. In this regard, modular fixtures (MFs) play an important role in practically improving productivity in flexible manufacturing systems (FMSs) due to this technology using highly productive computer numerical control (CNC) machines. MFs consist of devices called jigs and fixtures for accurately holding the workpiece during different machining operations. The design process is complex, and traditional methods of MF design were not sufficiently productive. Computer-aided design (CAD) software has rapidly improved as a result of the development of computer technology, and has provided huge opportunities for modular fixture designers to use its 3D modelling capabilities to develop more automated systems. Computer-aided fixture design (CAFD) systems have become automated by the use of artificial intelligence (AI) technology. This study will investigate the further improvement of automated CAFD systems by using AI tools. In this research, an integrated CAFD is developed by considering four main requirements: · a 3D model of the workpiece, · an expert system, · assembly automation of MFs, · an efficient feature library. The 3D model is an important factor that can provide the appropriate specification of the workpiece; SolidWorks is used the CAD environment for undertaking the 3D modelling in this study. The expert system is applied as a tool to make right decisions about the CAFD planning process, including locating and clamping methods and their related element selection. This helps achieve a feasible fixture design layout. SolidWorks API and Visual Basic programming language are employed for the automating and simulation of the assembly process of MFs. A feature library of modular fixture elements is constructed as a means to simplify the fixture design process.

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Cruz, Diogo Luiz Lemes da. "Metodologia para implementação de controle supervisório modular local em controladores lógicos programáveis." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/1910.

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Made available in DSpace on 2016-12-12T17:38:38Z (GMT). No. of bitstreams: 1 Diogo Luiz Leme da Cruz.pdf: 2277911 bytes, checksum: 44818fa572a2ccc7f237939664149ec3 (MD5) Previous issue date: 2011-07-29
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Currently, manufacturing automation has assumed an increasingly important role within the industry and the problems of automated control systems have become increasingly complex. Thus, the traditional use of empirical methods heavily base on the experience of the programmer can lead to inappropriate or ineffective solutions. In this case, the Supervisory Control Theory (SCT) of Ramadge and Wonham (1989) cam be a suitable tool because it ensures the achievement of optimal control logic (minimally restrictive and nonblocking) and also that meets the specifications of control. This paper presents a methodology for implementation of SCT in Programmable Logic Controllers (PLCs). The modeling of the plant and the specification of control is done by automata and languages, and in order to exploit the modular nature of the plant and the specifications we use the local modular approach (QUEIROZ and CURY, 2000) for the synthesis of supervisors. The use of a formal methodology for implementing control system also allows to standardize in the development, testing and structure of the PLC code and obtain a free of errors solution and crashes, discarding the empirical methods. The methods of implementation of the TCS in PLC existing literature have the feature to limit the evolution of the system, often dealing with one event per PLC scan cycle. Also presented is a series of problems that can occur in the implementation of supervisors in control elements such as PLCs (FABIAN and HELLGREN, 1998). However, not all of these problems have solutions and for some of them are presented some properties that the modeling of the system must ensure in order to avoid such problems. This method treats all the uncontrollable events produced by the plant in just one PLC scan cycle. The also promotes the control of the plant at the end of cycle. The development of this methodology takes into account the possible problems when using the theory into practice. Thus providing solutions to the problems. In this case the solutions, Choice , stands out. It promotes the random generation of controllable events. One it is give priority to a particular event over another, it can cause the system to lock or be inoperative (MALIK, 2002). To facilitate the implementation of supervisory control structure in PLC, was created a computational tool for the automatic generation of control logic, based on the proposed methodology that converts the list generated by the software Discrete Event System (DES) in LADDER code. The validation of the results obtained with the tool generation was done through simulations for different problems of supervisory control.
Na atualidade, a automação da manufatura tem assumido cada vez mais um papel importante dentro das indústrias e os problemas de controle de sistemas automatizados têm se tornado cada vez mais complexos. Assim, o tradicional uso de métodos empíricos fortemente baseados na experiência do programador pode levar a soluções inadequadas ou ineficientes. Neste sentido, a Teoria de Controle Supervisório (TCS) apresentada por Ramadge e Wonham (1989) se mostra uma ferramenta adequada uma vez que garante a obtenção de uma lógica de controle ótima (minimamente restritiva e não bloqueante) e que satisfaz às especificações de controle. Este trabalho apresenta uma metodologia para implementação da TCS em Controladores Lógicos Programáveis (CLPs). A modelagem da planta e das especificações de controle é feita por autômatos e linguagens e no intuito de explorar a modularidade da planta e das especificações utiliza-se a abordagem modular local (QUEIROZ e CURY, 2000) para a síntese dos supervisores. O uso de uma metodologia formal para a implantação em sistemas de controle possibilita ainda uma padronização no desenvolvimento, teste e estrutura de códigos nos CLPs e obter uma solução livre de erros e bloqueios, fugindo dos métodos empíricos. Os métodos de implementação da TCS em CLP encontrados na literatura apresentam a característica de limitar a evolução do sistema, muitas vezes tratando um único evento por ciclo de varredura do CLP. Também, é apresentada uma série de problemas que podem ocorrer na implementação de supervisores em elementos de controle como CLPs (FABIAN e HELLGREN, 1998). Entretanto, nem todos os problemas apresentados são solucionados e para alguns deles são apresentadas propriedades que o modelo do sistema deve satisfazer para que tais problemas não se manifestem. Já a metodologia desenvolvida neste trabalho permite tratar em um mesmo ciclo de varredura do CLP todos os eventos não controláveis gerados pela planta, e ainda promover o controle da mesma a partir dos eventos controláveis gerados ao final desse ciclo. O desenvolvimento desta metodologia leva em consideração os problemas que podem ocorrer quando se utiliza a teoria na prática, apresentando uma solução para alguns desses problemas. Destaca-se a solução do chamado problema da escolha, cuja priorização indevida de eventos pode levar ao bloqueio ou tornar parte do sistema inoperante (MALIK, 2002). Como solução para este problema propõe-se uma escolha aleatória dinâmica para a geração dos eventos controláveis, evitando assim os problemas mencionados. Para facilitar a implementação da estrutura de controle supervisório no CLP foi criado um software de geração automática de código, que baseado na metodologia proposta, converte a listagem gerada pelo software de Sistema a Eventos Discretos (SED) em linguagem LADDER. A validação dos resultados obtidos com a ferramenta de geração de código foi realizada por intermédio de simulações feitas para diferentes problemas de controle supervisório.

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Vestlund, Jimmy. "Streamlining tool design and manufacturing process for blancing and function test equipment to a propeller hub assembly." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-35176.

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Rolls-Royce AB in Kristinehamn, Sweden, part of Rolls-Royce Marine, is a leading developer and supplier of water jet and propeller based propulsion equipment. Its low volume production series and wide product variety offered to its customers along with an increasingly competitive market has entailed an increased demand on both delivery time and cost reductions. The on-site manufacturing engineering department is responsible for developing all tools and fixtures, and programming required to maintain the on-site production, assembling and quality testing. As part of the departments streamlining efforts this study aimed on evaluating streamlining possibilities related to the existing tool design used for static balancing and function testing controllable pitch propeller assemblies before packaging and shipping, along with the related tool development and manufacturing processes has been conducted.The process evaluation started from the point when a hub assembly design was finalized until when a manufactured tool was delivered for use in production. Work focused on locating inefficient activities and product properties, with respect to tool cost and lead time, followed by setting up an amendment proposal, implementing it and producing an alternate tool design of which the effects on tool cost and manufacturing lead time would be evaluated. Post evaluating the current state of the process and product a set based front loaded product development methodology known as Modular Function Deployment was chosen to be the applied method. This application resulted in a modular tool design that avoided the determined most inefficient manufacturing operation combination of welding and annealing. Modularity increased manufacturing flexibility, enabling more concurrent manufacturing, to reduce the lead time. The tool design also applied integral properties by identifying the common components and features between tool sizes. This led to reducing manufacturing and material costs. Possible lead time reduction for manufacturing was determined to be 35-45%, 3-4weeks, in comparison with the original tool design due to increased parallel manufacturing and avoiding inefficient manufacturing methods. The estimated cost reduction for combined development and manufacturing was determined to be 105K SEK the initial year followed by 175K SEK the second year assuming the current tool manufacturing rate. The combined effects of reduced cost and lead time would be beneficial to Rolls-Royce AB by contributing to an increase in delivery reliability and competitive prices on the market

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Sandahl, Pär, and Cornelia Broman. "Förbättringskoncept stålfront : Cibes A5000 plattformshiss." Thesis, Högskolan i Gävle, Maskinteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36332.

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Stålfronter är Cibes mest eftertraktade alternativ av karm och dörrkombination till den offentliga marknaden såsom skolor och gallerior på grund av den robusta konstruktionen. Det förekommer dock problem med tillverkningseffektivitet, hantering och korrosion. Problematiken som uppstår har tydligt samband med karmens nuva-rande sammansvetsade konstruktion, samt att de inte är konstruerade att installeras i korrosiva miljöer. Genom förundersökningar hur dagens tillverkning ser ut och vad som önskas i konstruktionen ställdes ett kvalitetshus upp. Från kvalitetshuset utgavs, genom viktning, de viktigaste önskemålen som arbetet bör uppfylla. Det viktigaste var att konstrukt-ionen ska vara modulär, därefter önskades minskad variation och korrosionshärdiga alternativa material. Med hjälp av idégenerering togs olika koncept fram vilka alla förutom de mest lovande eliminerades. Det slutliga konceptet innebär en modulär karm där variationen av moduler uppgår till 39 för att bibehålla samma mängd karmvariationer som da-gens konstruktion, det vill säga 146 karmvariationer. Det togs även fram tre material för eventuell tillämpning i olika miljöer. Två av materialen har lägre pris än dagens (DC01 och DX51+Z275), dessutom har två av dem högre korrosionshärdig-het (DX51+Z275 och SS-EN 1.4404). Konceptets hållfasthet verifierades med håll-fasthetsberäkningar kompletterat med FE-analys. Det framtagna konceptet leder till effektivare tillverkningsprocess genom att färre produkter behöver lagras och hanteras. Materialpriserna och hållfastheten i koncep-tet är dock uppskattad till viss grad och behöver vidare verifieras.
Steel fronts is Cibes most sought after frame and door combination to the public market such as schools, malls etc. because of the robust construction. However, there are problems with manufacturing efficiency, handling, and corrosion. The problems that arise are significantly connected to the construction being delivered from a subcontractor as a complete welded sheet metal construction. In addition, they are not designed to be installed in corrosive environments. Through preliminary investigations how today's manufacturing takes place and what is desired in the construction a QFD was made. By weighting, the QFD presented the most important qualities which the work should fulfill. The most important quality was that the construction must be modular, followed by reduced variation and corrosion resistant alternatives. With the help of idea generation methods, different concepts were developed, which all but the most promising were to be eliminated. The final concept includes a modular frame where variations of modules is 39 to maintain the same amount as today´s construction with 146 frame variations. Three materials were also con-cluded for possible application in different environments. Two of the materials have a lower price than the material used today (DC01 and DX51+Z275), in addition, two of them have a higher corrosion resistance (DX51 + Z275 and SS-EN 1.4404). The strength of the concept was verified with strength analysis supplemented with FE analysis. The developed concept leads to more efficient manufacturing process in that fewer products need to be stored and handled. However, the material prices and the strength of the concept are appreciated to a certain extent and need to be further verified.

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Pierce, Daniel W. "Toward a comprehensive cost model for multichip module (MCM) manufacturing." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/11113.

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Michaelsen, Marcos Felipe. "Arc spray MID; a novel manufacturing technique for electronic modules." Thesis, University of Hertfordshire, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409460.

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Krautkramer, Carrie A. "Operations training modules for Liberty Check Printers' imprint manufacturing environment." Online version, 1998. http://www.uwstout.edu/lib/thesis/1998/1998krautkramerc.pdf.

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Quillerou-Grivot, Edwige. "Fonction psychologique et sociale du collectif pour la santé au travail : le cas de l’activité d’opérateurs de montage automobile." Thesis, Paris, CNAM, 2011. http://www.theses.fr/2011CNAM0792/document.

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Cette thèse s’intéresse au travail collectif d’opérateurs de montage travaillant en « îlot de production » et à la construction de la santé dans ce contexte de transformations du monde ouvrier. Lors d’une intervention dans une entreprise de logistique, dernier maillon de la chaîne de sous-traitance de l’industrie automobile, nous avons proposé d’installer un cadre clinique de l’activité en psychologie du travail. Ainsi, les opérateurs volontaires ont pu découvrir combien les expériences des autres - même ceux croisés ponctuellement de par le turn-over des intérimaires - et les débats autour des façons de faire des collègues, pouvaient devenir une ressource pour leur propre travail. Malgré la difficulté de maintenir un travail de co-analyse avec un fort turn-over, les opérateurs ont aussi pris conscience de la fonction sociale de leur collectif au sein de l’entreprise, lors du dernier comité de pilotage de notre intervention. Ce double processus psychologique et social de la fonction du collectif chez les opérateurs leur permet de créer de nouvelles manières de transformer le travail, participant ainsi au développement de leur santé
This thesis speaks about collective work of the operators of assembly in modular manufacturing unit and health building in this context of industrial work transformations. During an intervention in a company of car logistics, the last link of the chain of subcontracting at car industry, we proposed them to construct a clinical frame of activity in work psychology. So, volunteers’ operators were able to discover how much the experiences of the others - even those crossed punctually due to the turnover of the temporary workers - and the debates around the manners to make the other colleagues could become a resource for their own work. In spite of the difficulty to maintain a work of co-analysis with temporary operators, the operators could also became aware of their collective social function, during the last steering committee of our intervention. This double psychological and social process of the collective function at the operators allows creating new ways to transform their work, so participating in the development of their health

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Madima, Takalani. "Manufacturing of synthetic soda ash." Thesis, University of the Western Cape, 2009. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6307_1284397464.

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The aim of the project was to study the manufacturing of synthetic soda ash (sodium carbonate, Na2CO3) on an industrial scale. Currently all Soda ash that is used in South Africa for manufacturing glass is imported at a high cost, and the company Nampak Wiegand Glass (South Africa) is investigating the possibility to locally manufacture synthetic soda ash. About 75% of soda ash is synthetically produced from either the Leblanc process, Solvay process, Modified Solvay (Dual) process or dry lime process. This study concentrated on the Solvay process on a laboratory scale for eventual input into a larger pilot plant. The produced material was analyzed using analytical techniques such as FTIR (Fourier Transform Infrared spectroscopy), Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy, Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma Atomic Emission spectroscopy (ICP-AES). There are certain standard requirements for impurities in the soda ash, and this needed to be measured and determined what changes to the process will bring the impurities to the required minimum standard. Environmental issues around the manufacturing process were also studied. After completing of the laboratory experiments and the extraction of required data from the results, Nampak will use the information to decide on a followup to the building of a small pilot plant to further test and develop the engineering and economical aspects of a full plant. If successful a full scale manufacturing plant can be developed in South Africa for producing soda ash.
This study thus will not only help Nampak Wiegand Glass in finalizing the decision to go ahead, but its result will also benefit other companies that use the soda ash in oil refining, water treatment, pulp and paper, chemical industry etc. Some parts of the work done will be proprietary to Nampak and subject to confidentiality agreement.

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Narayanan, Mukund. "HYBRID FLOW STRATEGIES FOR HIGH VARIETY LOW VOLUME MANUFACTURING FACILITIES TO IMPLEMENT FLOW AND PULL." UKnowledge, 2002. http://uknowledge.uky.edu/gradschool_theses/366.

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Lean Manufacturing has proven to be a very successful strategy for achieving production efficiencies. The basic elements of lean manufacturing are flow and pull. The traditional methods for establishing flow and pull do not fit well in the realm of high variety low volume manufacturing systems. This thesis provides a general framework for establishing flow and pull in high variety low volume manufacturing systems, through the concept of hybrid flow layouts. The existing analytical procedure for forming hybrid flow layouts is described and a new heuristic procedure, that overcomes some of the limitations of the existing procedure, is proposed. The performance of the new procedure in comparison to the existing procedure is illustrated using a real world case study. Finally, certain practical implementation issues that affect the formation of hybrid flow layouts are provided.

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Nguyen, Levy H. "The Data, The Generic, and the Architecture." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397477465.

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Ghosh, Indrajit. "Lyocell Fiber-Reinforced Cellulose Ester Composites-Manufacturing Considerations and Properties." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35023.

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Biodegradable thermoplastic composites were prepared using high modulus lyocell fibers and cellulose acetate butyrate (CAB). Two reinforcement fiber types: fabric and continuous fiber tow were used. Fabric had advantages of uniform alignment and easier processing, but lacked the use as a unidirectional reinforcement and a continuous method of matrix application. Three different matrix application methods were screened for both fiber types. Matrix application by suspension of particles in water was not feasible because of particle sizes > 15 µ m. The other disadvantages were high moisture absorption during matrix application and void formation during consolidation. Melt processing technique using alternating sandwich structure of fabrics and CAB films produced composites with impressive appearance, low void contents and low moisture absorption. However, SEM results revealed interfacial failure and extensive fiber pull out. Relatively larger fiber and matrix regions were present on the scale of 10^-3m. Solution prepregging technique using methyl ethyl ketone (MEK) as a solvent for CAB and continuous fibers as reinforcement produced composites with uniform matrix distribution, high tensile strengths and high modulus, and even wetting of fibers by CAB. A maximum tensile modulus of 21.5 GPa and a maximum strength of 251.7 MPa were achieved for a continuous fiber reinforced composites at a volume fraction of 66.5% compared to 0.8 GPa and 76 MPa for the matrix, respectively. Void contents and water absorption were relatively high compared to comparable carbon fiber composites.
Master of Science

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Burks, William Garret. "Modeling and Manufacturing of Dynamic Vocal Folds: First Steps Towards an Active Voice-Box Prosthesis." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/96557.

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The movement and control of the vocal folds within the laryngeal cavity enables three crucial physiological functions: 1) allowing respiration by opening, 2) aiding in airway protection by closing, and 3) regulating sound production during phonation. Although treatment options have improved, many of the estimated 7.5 million individuals in the United States who are annually affected by voice-related disorders still face serious challenges related to dysphonia and dysphagia. The need for improved voice-disorder treatments has motivated the work presented in this dissertation which focuses on modeling and manufacturing the vocal folds and aims to answer three main questions: 1) what are the mechanical properties of the vocal folds and how do they change across the full vocal range? 2) how do those properties influence the dynamic behavior of the tissue? and 3) can we manufacture a synthetic vocal fold model that exhibits a desired and controllable dynamic behavior? First, the elastic properties of sixteen porcine vocal folds were evaluated through uniaxial tensile tests on a custom built experimental setup. Stress-strain data was analyzed using an optimization method to yield continuous model parameters which described the linear and nonlinear elastic regions as well as transition points between those regions. Next, the impact of the vocal fold elastic properties on the frequencies of vibration was evaluated through dynamic tests on excised porcine larynges. Sound data was analyzed via a spectrogram and through the use of fast Fourier transforms to study changes in the frequency of vibration while the vocal folds were stretched. Additionally, a mathematical aeroelastic model of phonation was implemented to further evaluate the changing elastic properties on vocal fold dynamics. Next, eight synthetic vocal fold models were created, each with varying mechanical properties and a geometry based on reported anatomical measurements of porcine vocal folds. The synthetic models were then dynamically tested to further study the impact of changes in mechanical properties on the dynamic behavior of the synthetic vocal folds.
Doctor of Philosophy
The movement and control of the vocal folds within the voice-box enables three crucial physiological functions: 1) allowing respiration by opening, 2) aiding in airway protection and swallowing by closing, and 3) regulating sound production during vocalization. Although treatment options have improved, many of the estimated 7.5 million individuals in the United States who are annually affected by voice-related disorders still face serious challenges related to speech production and swallowing which often results in significant detrimental impacts to quality of life. The need for improved treatments is most easily observed in the evaluation of treatment options following a total laryngectomy, which is a procedure where the entire voice-box is removed often due to cancer. Following a laryngectomy, all three of the vital functions of the vocal folds are immediately impacted as patients adjust to breathing through and protecting a redirected airway and are forced to use alternative methods of speech production which often result in monotone or robotic-sounding speech. The need for improved voice-disorder treatments has motivated the work presented in this dissertation which focuses on modeling and manufacturing the vocal folds and aims to answer three main questions: 1) what are the mechanical properties of the vocal folds? 2) how do those properties influence the dynamic behavior of the tissue during sound production? and 3) can we manufacture synthetic vocal folds that produce a desired and controllable dynamic behavior? Sixteen porcine vocal fold samples were mechanical tested to evaluate the elastic properties of the tissue. Next, porcine voice-box samples were experimentally tested in a way that simulated sound production by subjecting the samples to a heated and humidified air flow, similar to the air flow conditions coming out of the lungs. In this way, the relationship between the tissue properties and the frequencies of sound was investigated. Lastly, the synthetic vocal fold samples were evaluated using a similar experimental protocol to further investigate the impact of changing structural properties on the dynamics of the vocal folds during sound production.

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Racca, Stephen Douglas. "Improving operational efficiency of a semiconductor equipment manufacturing warehouse through effective utilization of Vertical Lift Modules." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101335.

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Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 59-60).
This thesis deals with improving the operational efficiency of automated part storage devices, in this case Vertical Lift Modules (VLM). This was accomplished by using dynamic slotting to maximize and maintain high material throughput, eliminating the need for periodic reslotting. Multiple VLMs can be used in parallel picking operations to improve material throughput. Common industry practice is to periodically reslot items once an unbalanced workload is obvious. This thesis investigates a method to avoid periodic reslotting by using incoming parts as a means to maintain a balanced workload amongst VLMs. Three different part allocation strategies are compared, namely Randomization, Snake and Order Grouping to determine their effectiveness and respective feasibility. The three strategies are then crafted into logical systems that could be used to strategically place received parts and eliminate the need for periodic reslotting. The Snake method was found to be the most well suited for this particular situation due to the small order sizes. This method provides a 35% savings in pick time, which is equivalent to approximately 733 hours annually.
by Stephen Douglas Racca.
M. Eng. in Manufacturing

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Huang, Heng. "Facility layout using layout modules." Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1059074390.

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Thesis (Ph. D.)--Ohio State University, 2003.
Title from first page of PDF file. Document formatted into pages; contains xii, 156 p. : ill., (some col.). Includes abstract and vita. Advisor: Shahrukh A. Irani, Dept. of Industrial and Systems Engineering. Includes bibliographical references (p. 147-156).

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Cohen, Elana Ann 1978. "Image engine study : strategic dynamic control for low volume potentially high mix modules." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/34794.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; in conjunction with the Leaders for Manufacturing Program at MIT, 2004.
Includes bibliographical references (p. 118-120).
The main goal of this project was to provide a case study on image engines for the purpose of developing a supply chain strategy. Initially, the current digital image engine manufacturing core competencies and respective capabilities were further defined and documented. Value chain maps were then developed for each line of business to assess Kodak's transition from analog to digital. The value chains clearly illustrate a lower reliance on consumables (including silver halide film and paper), and demonstrate an emerging capability in the digital equipment market. As image engine performance directly impacts the level of digital image quality, the study concludes that strategic dynamic control of these image engines is critical in order to maintain future competitive advantage.
by Elana Ann Cohen.
M.B.A.
S.M.

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Mavros, Nicholas C. "Advanced Manufacturing of Titanium Alloys for Biomedical Applications." Cleveland State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1527771497260907.

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Yan, Bing Wen. "Evaluating employee responses to the lean enterprise system at a manufacturing company in Cape Town, South Africa." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&amp.

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There is usually much reaction among employees when a new system is introduced in an organization. These things are intended to improve performance but sometimes cause considerable controversy amongst the employees and management. This study examines the implementation of LE and it attempts to analyse the reactions of employes in a manufacturing company in South Africa - GKN Sinter Metals (GKN), Cape Town. According to the literature review, the implementation of the LE can play a significant role in improving the company's performance.

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Wang, Neng. "A combined computational and experimental study of heterogeneous fracture." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53982.

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Material property heterogeneity is present ubiquitously in various natural and man-made materials, such as bones, seashells, rocks, concrete, composites, and functionally graded materials. A fundamental understanding of the structure-property relationships in these material systems is crucial for the development of advanced materials with extreme properties. Well-developed homogenization schemes exist to establish such relationships in elasticity, electrostatics, magnetism, and other time- or history-independent material properties. Nevertheless, one’s understanding of the effective fracture properties of heterogeneous media is remarkably limited. The challenge here is that heterogeneous fracture, as a history-dependent process, involves complex interaction and negotiation of a discontinuity front with local heterogeneities. The determination of effective fracture properties necessitates a critical interrogation of this evolutionary process in detail. In this work, a combined experimental and modeling effort is made to examine and control fracture mechanisms in heterogeneous elastic solids. A two-phase laminated composite, which mimics the key microstructural features of many tough biological materials, is selected as a model material. In the computational part of this work, finite element analysis with cohesive zone modeling is used to model crack propagation and arrest in the laminated direction. A crack-tip-opening controlled algorithm is implemented to overcome the instability problems associated with inherently unstable crack growth. Computational results indicate that the mismatch of elastic modulus is an important factor in determining the fracture behaviors of the heterogeneous model material. Significant enhancement in the material’s effective fracture toughness can be achieved with appropriate modulus mismatch. Systematic parametric studies are also performed to investigate the effects of various material and geometrical parameters, including modulus mismatch ratio, phase volume fractions, T-stress, and cohesive zone size. Concurrently, a novel stereolithography-based additive manufacturing system is developed and used for fabricating heterogeneous test specimens with well-controlled structural and material properties. Fracture testing of each specimen is performed using the tapered double-cantilever beam (TDCB) test method. With optimized material and geometrical parameters, heterogeneous TDCB specimens are found to exhibit higher fracture toughness than their homogenous counterparts, which is in good agreement with the computational predictions. The integrative computational and experimental study presented here provides a fundamental mechanistic understanding of the fracture mechanisms in brittle heterogeneous materials and sheds light on the rational design of ultra-tough materials through patterned heterogeneities.

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Mota, Likese Angelinah. "Analyzing the relationship between the Gross Domestic Product (GDP) of Lesotho and manufacturing :1997to 2007." Thesis, University of the Western Cape, 2009. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_4707_1297857069.

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The study draws on secondary data from the Bureau of Statistics in Lesotho. Simple and multiple linear regression models techniques are used to analyze the relationship between the GDP of Lesotho and the GDP of manufacturing. The secondary data is analyzed using Statistical Packages for Social Sciences (SPSS) and Excel. The major finding is that there exists a strong positive linear relationship ( r = 0.986) between the GDP of Lesotho and the GDP of manufacturing. This means that every time the GDP of manufacturing increases the GDP of Lesotho does the same. Based on this finding, the study recommends that in order to improve, sustain and maintain the economic growth and to avoid further deterioration in the manufacturing industry, the manufacturing capacity must be strengthened for it to effectively deal with growing competition and rapid economic changes.

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Voit, Walter Everett. "Optimization of mechanical properties and manufacturing techniques to enable shape-memory polymer processing." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37136.

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This research investigates the synthesis and manufacture of shape-memory polymer (SMP) systems for use in biomedical and commodity applications. The research centers on improving the mechanical properties of thermoset acrylate copolymers with memory properties at reasonable cost through various design and manufacturing techniques: high-strain polymer synthesis and radiation crosslinking. The research assesses combinations of linear monomers and a low density of crosslinker to characterize new functional materials and optimize emerging mechanical properties such as the glass transition temperature (Tg) and rubbery modulus (ER). Exploring materials with large recoverable strains, a model copolymer of photo-polymerized methyl acrylate (MA), isobornyl acrylate and crosslinker bisphenol A ethoxylate dimethacrylate was shown to strain above 800%, twice the previously published value for SMPs, and recover fully. In the quest to maximize fully recoverable strains, a new hybrid molecule nicknamed Xini, which serves as both an initiator and a crosslinker, was also theorized, synthesized, polymerized into SMP networks and characterized. In the past, thermoset SMPs were made into complex shapes using expensive top-down techniques. A block of polymer was made and custom machining was required to craft complex parts. This prohibited devices in cost-competitive commodity application spaces. This research has proposed and validated a new method for accurately tuning the thermomechanical properties of network acrylates with shape-memory properties: Mnemosynation, eponymously named for the Greek goddess of memory. This novel manufacturing process imparts long term 'memory' on an otherwise amorphous thermoplastic material utilizing radiation-induced covalent crosslinking, and can be likened to Vulcanization, which imparts strength on natural rubber utilizing sulfur crosslinks. Adjustment of ER in the range from below 1 MPa to above 13 MPa has been demonstrated. ER was tailored by varying both radiation dose between 5 and 300 kGy and crosslinker concentration between 1.00 and 25.0 wt%. Tg manipulation was demonstrated between 23 ˚C and 70 ˚C. Mnemosynation combines advances in radiation grafting and acrylic SMP synthesis to enable both traditional plastics processing (blow molding, injection molding, etc.) and control of thermoset shape-memory properties. Combining advances in both high strain polymer synthesis and radiation crosslinking, a new paradigm in SMP composites manufacture-namely, that materials can be designed to enhance strain capacity at moderate stress, rather than maximum strength-was established. Various fibers with very different mechanical properties were impregnated with SMPs and thermo-mechanically assessed to develop an understanding of the technical parameters necessary to craft self-adjusting, multi-actuated, SMP-fiber composite orthopedic casts. This exploration syncs with the overarching aim of the research, which is to understand the fundamental scientific drivers necessary to enable new devices mass-manufactured from acrylate copolymers and optimize their emerging mechanical properties.

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Rusia, Devendra Kumar. "A modified viscoplastic formulation for large deformations using a bulk modulus approach." Ohio : Ohio University, 1987. http://www.ohiolink.edu/etd/view.cgi?ohiou1183058011.

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Dissertations / Theses on the topic 'Modular Manufacturing'

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