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1
Giordano, Maria. « Matrici geometriche del decoro architettonico. Photo-Scanning, reverse engineering e processi CAD/CAM ». Doctoral thesis, Universita degli studi di Salerno, 2011. http://hdl.handle.net/10556/157.
Texte intégralRésumé :
2009 - 2010La ricerca si applica allo studio di decorazioni compositive a matrice geometrica originate dalle mutevoli combinazioni di forme elementari: la divisione regolare del piano con forme chiuse che lo ricoprono completamente, senza sovrapporsi e senza mai lasciare spazi vuoti. Operando su di esso, si inizia a quantificarlo, individuando ogni sua singola parte: la misurazione conduce alla scomposizione in forme elementari di figure complesse. Nello sviluppo di tali configurazioni, il problema della replica è sempre presente, dalla mera idea progettuale fino alle azioni di restauro, in quanto dalla ripetitività delle singole parti – fondamento del suo stesso esistere – prende origine l’intera composizione. Si è cercato, quindi, a partire da un’attenta analisi delle leggi simmetriche che dettano le logiche generative del disegno ornamentale, per una ben precisa canonizzazione di temi e motivi, di identificare gli schemi geometrici che consentano il controllo razionale della decorazione tramite l’individuazione dei procedimenti della iterazione in serie. Non si restituisce semplicemente il dettaglio così come ci appare, ma la scomposizione teorica dell’opera permette di individuare, nella successiva ricomposizione grafica, la natura e la posizione di ogni singolo elemento: uno sguardo critico che guida a una corretta e realistica riproduzione. I modelli formali tendono a divenire così modelli geometrici, simbolo di una struttura più profonda, che è possibile cogliere con l’aiuto di precisi schemi topologici. Attraverso i casi studio esaminati, ed in particolare in funzione del sistema decorativo riscontrato, è stato possibile individuare procedure metodologiche di rilievo ritenute idonee ad esplicitare il processo geometrico di base al fine di facilitare la successiva fase di replica sia in ambiente digitale che fisico e di favorire una funzionale sistematizzazione dell’ornato. In particolare si è ricorso ad un’innovativa metodologia, detta di photo scanning, che permette l’acquisizione simultanea di nuvole di punti e di texture. E così, nota la legge armonica che domina l’intera composizione, definita dal movimento rigido di un modulo predefinito su di un reticolo piano, la decorazione può facilmente riprodursi partendo dalla semplice unità quale entità che può essere, con l’utilizzo di macchine a controllo numerico, reiterata meccanicamente. La procedura è stata applicata a casi studi idonei per analizzare i principi della ripetibilità in serie e delle operazioni di laboratorio; ciò ha consentito, grazie alla ri-progettazione digitale e alla produzione con gli strumenti della tecnologia a controllo numerico, di codificare la riproducibilità tecnica, immateriale e materiale, del decoro architettonico. Le procedure e le strumentazioni descritte possono essere un potente metodo per il controllo, la verifica e il monitoraggio del decoro architettonico, permettendo di realizzare database metrici interattivi in grado di fornire in qualsiasi momento informazioni sull’oggetto rilevato. Impostare un modello di schedatura dei rivestimenti geometrici costituisce uno strumento di catalogazione funzionale sia alla tutela e alla fruizione del bene immobile, sia alla definizione di un metodo di approccio allo studio dei gruppi di simmetria. Si sarà così in grado di stabilire l’origine degli schemi decorativi, i percorsi di distribuzione, lo sviluppo di tendenze locali. [a cura dell'autore]
IX n.s.
2
Gandhi, Ashit R. « A CAD/CAM interface for computer-aided design of cams ». Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41555.
Texte intégralRésumé :
The purpose of this thesis is to provide a complete package for the design and three dimensional modeling display of cams.
The software produced as a part of this work will operate as a module of CADAM to produce cam designs and enter the resulting cam as a CAD model and produce the graphical display of the cam.
In addition to the introductory material, this thesis is divided into four sections. The section on the graphics packages used in this thesis includes a brief history and capabilities of each of the packages. The second section details the procedure to be adopted in order to design a cam. The next section details ANICAM, the program that has been developed to incorporate the design and display procedure. The fourth section of this thesis contains recommendations for further work in this area.
The theoretical work in this project is a combination of original derivations and applications of the theory in the design literature.
Master of Science
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Wong, Francis Seung Yin. « Case-based reasoning for computer-aided inspection process planning / ». access full-text access abstract and table of contents, 2005. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-meem-b19887656a.pdf.
Texte intégralRésumé :
Thesis (Ph. D.)--City University of Hong Kong, 2005."Submitted to Department of Manufacturing Engineering and Engineering Management in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 164-175).
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Gonçalves, Marco Aurélio da Fontoura. « Geração de programas CNC através da implementação de funções direcionadas às características do processo produtivo ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/79836.
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Este trabalho descreve uma metodologia para a geração de programas CNC para otimizar um sistema produtivo. Quanto às informações geométricas, o sistema caracteriza-se por utilizar os ciclos de usinagem que o comando da máquina disponibiliza, por possibilitar a aplicação de ciclos desenvolvidos com recursos de programação parametrizada e por gerar novos ciclos, através de uma linguagem genérica, proposta neste trabalho, em um editor de programação parametrizada. Quanto aos dados tecnológicos, ou seja, as condições de usinagem definidas no código de programação, o sistema permite a otimização dos parâmetros de corte através de um banco de dados com informações realimentadas com resultados obtidos da produção. A análise da viabilidade da metodologia proposta é realizada através da implementação de um protótipo de um sistema dedicado à programação de tornos CNC. O protótipo é composto de aplicativos computacionais desenvolvidos e orientados à otimização do sistema produtivo. A metodologia para geração de funções CAD/CAM foi implementada e testada mostrando resultados eficientes. O protótipo implementado como um conjunto de ferramentas aplicativas integradas é de fácil operação e utilização unindo todos os módulos projetados.This study describes a methodology for the generation of CNC programs to optimize a productive system. Regarding geometrical information, the system is characterized by the use of machining cycles that the machine tool control provides because a allows the application of cycles developed with parameterized programming and by generation of new cycles, through a generic language, proposed in this study on a parameterized programming editor. As for technological data, i.e. the machining conditions set out in the programming code, the system allows the optimization of cutting parameters through a data base with information fed back with results of production. The feasibility analysis of the proposed methodology is accomplished through the implementation of a prototype of a system dedicated to programming CNC lathes. The prototype consists of computer applications developed and oriented to the optimization of the production system. The methodology for the generation of CAD/CAM functions has been implemented and tested showing effective results. The prototype implemented as an integrated set of applicative tools is of easy operation and use connecting all designed modules.
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Kalina, Adam. « Technologie výroby zadané součásti ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231748.
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This document describes the design of new production technology specific part in an engineering company. The specific part is manufactured on a machining center by milling method. To create model was used SolidWorks software and to create CNC program was used SolidCAM program. There is production process created with new and old technologies. There is a comparison of both technologies in conclusion.
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Carlson, Shane A. « Development of a Variational Part Model Using In-Process Dimensional Measurement Error ». Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1341.pdf.
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黃啓榮 et Kai-wing Wong. « A CAD/CAM system for sheet metal blanking dies ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B31210594.
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Owen, John J. IIII. « Economic evaluation and justification of industrial automation ». Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/24539.
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Ng, Wai-ming Micky. « Orientating, tessellating and direct slicing of 3D CAD models : improving accuracy and efficiency for rapid prototyping process / ». Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19537621.
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Tabani, Haroon R. « Application of NC machining of complex surfaces to streamlined extrusion dies ». Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182523937.
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Šebesta, Vít. « Aplikace CAD/CAM softwaru hyperMILL při obrábění ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399331.
Texte intégralRésumé :
The main aim of this thesis is to acquire basic knowledge of CAM program hyperMILL 2019 with comparison of the ball nose end mill and circle segment end mill with taper form, economical evaluation and than make force analysis of specimen from aluminium alloy by milling with spindle moulder. Another aim of this thesis is also an analysis of force effects and force directions of the milling tool, advantages by using the circle segment end mill with taper form, the most common types of aluminium alloys and their mechanical properties and next comparison of CAM program hyperMILL with other selected program in the theoretic part.
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Xue, Feng, et 薛峰. « Evolutionary computation of geodesic paths in CAD/CAM ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31226978.
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Paseka, Jan. « Optimalizace NC programu pomocí CAD/CAM software ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231402.
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Tendency of this master thesis is a proposal of savings in the process of technological production’s preparation in a manufacturing company. In the first part is elaborated general theoretical study of current components and NC programs. Based on this, and finished analysis was defined optimization’s proposals described in second part. Thanks this complete proposals comes to time and money savings, which are needed for implementation of prototype project into serial production.
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West, Aaron P. « A decision support system for fabrication process planning in stereolithography ». Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16896.
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Oliveira, José Ricardo Menezes. « Contribuição CAD/CAE em análise da confiabilidade do processo de desenvolvimento de produto ». Universidade Federal de Pernambuco, 2012. https://repositorio.ufpe.br/handle/123456789/10840.
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Submitted by João Arthur Martins (joao.arthur@ufpe.br) on 2015-03-05T18:05:44Z
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Este estudo apresenta a utilização de recursos CAD e CAE como ferramentas de desenvolvimento de novos produtos com proposição ao aumento dos índices de confiabilidade. Para atingir esta meta buscou-se a implementação de um componente do sistema de conformação mecânica por injeção em uma indústria fabricante de chuveiros elétricos. A aplicação de ferramentas qualitativas detectou as falhas críticas do referido sistema e delimitou uma especificação de projeto para concepção de alternativa de solução. A análise por elementos finitos (FEA), permitiu a construção de um novo modelo de agulha para o molde de injeção em consonância às premissas estabelecidas. Decorrido o período da implantação e ajustes pertinentes coletou-se novas amostras da aplicação prática, cujo objetivo foi comparar aos resultados do sistema convencional. Os resultados consolidados corroboram para um aumento significativo dos critérios de desempenho observados, sobretudo no que concerne às funções taxa de falhas, MTTF, e confiabilidade, permitindo-se inferir que os recursos computacionais, constituem-se como alternativa insofismável para resolução dos problemas projetuais desta natureza.
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Frydén, Cecilia, et Nadia Omri. « Effektivisering av konstruktörens arbete i produktutvecklingsprocessen med hjälp av 3D-modeller och detaljritningar ». Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-14037.
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I kursen Examensarbete i integrerad produktutveckling har ett projekt utförts av designingenjörsstudenterna Cecilia Frydén och Nadia Omri våren 2017 på Högskolan i Skövde. Projektet genomfördes i samarbete med konsultföretaget ÅF Industry AB i Skövde och några av deras externa tillverkare. I ÅF:s produkt-utvecklingsprocess ägnar konstruktörerna många timmar åt att framställa tillverkningsunderlag, 3D-modeller och detaljritningar. Tillverkningsunderlagen misstänks innehålla överflödig information som inte används av tillverkarna, vilket innebär att konstruktören ägnar tid åt arbetsmoment i onödan. Av den anledningen vill ÅF att det undersöks vilken information i tillverknings-underlaget som är överflödig och att alternativ på hur det utformas tas fram. Aktionsforskning är den övergripande metodiken som används. Projektet har varit fokuserat på att kartlägga arbetsflödet, identifiera mottagarna av tillverkningsunderlaget och deras behov samt definiera tekniska möjligheter för att generera lösningsförslag på alternativa arbetsmetoder. Lösningsförslagen har utvärderats med både konstruktörer och med mottagarna hos tillverkarna. Utifrån utvärderingarna har ett lösningsförslag valts som består av en 3D-modell med Model Based Definition (MBD) där Product Manufacturing Information (PMI) reducerats och förmedlas tillsammans med en 3D-PDF.This project was made for the Bachelor Degree Project in Product Design Engineering course at the University of Skövde by Cecilia Frydén and Nadia Omri in cooperation with the engineering company ÅF during the spring of 2017. ÅF’s designers spends several hours creating 3D-models and detail drawings as manufacturing information for the manufacturing phase of the product development. Some of this time is suspected to be spent unnecessary since some of the information generated by the designers might not be used during the manufacturing process. The aim of the project is to generate a solution to increase the efficiency of the designer’s workflow while generating Product Manufacturing Information (PMI) without compromising the manufacturer’s understanding of the information. Research upon the product manufacturing information generation and handling was done in order to identify its main issues. Observation and interviews were done in order to identify its users and clarify the main purpose of the manufacturing information. The result provides reduced PMI in the 3D-model and uses a 3D-PDF to communicate the PMI to the manufacturers. This was decided from evaluations with the manufacturers and designers and is believed to improve the communication between them but also to make the designer’s workflow more efficient.
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Tollander, Sofia. « A Value Proposition for Cloud-Enabled Process Planning ». Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264389.
Texte intégralRésumé :
To stay competitive in today’s fast-paced market, manufacturing companies must shorten their time-to-market and decrease their costs by efficiently utilizing their resources. Here, improved software and better software integration throughout the product realization process is considered to be a key enabler. The aim of this thesis work has been to investigate the current workflow in design and process planning to outline a cloud-based application to support these activities. Pains and bottlenecks in these workflows have been identified through interview and field studies at six Swedish manufacturing companies of different sizes, in different industries, and with different operational models. The major areas of improvement were identified whereof one them, the initial activity of understanding customers’ needs, was decided to further focus on. From receiving a request for quotation from the customer to acceptance of an order, the following time-consuming activities were recognized: understand and discuss design intent as well as suggest possible design changes to improve manufacturability, analyze and review 2D drawings and 3D models, and develop order quotations. In this thesis work, a mock-up prototype has been put forward. The intent with this is to bridge a gap that has been identified through the mapping between manufacturers needs and functionality of available CAD/CAM software and the identified areas of improvement from the workflow investigations. The proposed solution, as presented in the mock-up prototype, has been validated together with three of the studied companies. At its current state, further improvements and validations are needed. Nevertheless, if further developed, it has the potential to create value within the entire manufacturing value chain.För att vara konkurrenskraftig på dagens snabbrörliga marknad måste tillverkande företag minska sina tid till marknad och reducera sina kostnader genom att utnyttja sina resurser mer effektivt. Här anses förbättrad programvara och bättre mjukvaruintegration genom hela produktrealiseringsprocessen vara en viktig möjliggörare. Målet med detta arbete har varit att undersöka det aktuella arbetsflödet i design och processplanering för att föreslå en molnbaserad applikation för att stödja dessa aktiviteter. Problem och flaskhalsar i dessa arbetsflöden har identifierats genom intervjuer och fältstudier hos sex svenska tillverkande bolag i olika storlekar, i olika branscher och med olika operativa modeller. De viktigaste förbättringsområdena identifierades varav en, den initiala aktiviteten för att förstå kundernas behov, beslutades att ytterligare fokusera på. Från att ha mottagit en offertförfrågan från kunden till acceptans av en beställning kunde följande tidskrävande aktiviteter identifieras: förstå och diskutera designintention samt föreslå möjliga designändringar för att förbättra tillverkningsförmåga, analysera och granska 2D-ritningar och 3D-modeller, och utveckla ordernoteringar. I det här arbetet har en prototyplösning tagits fram. Avsikten med denna är att överbrygga ett gap som har identifierats genom kartläggning mellan tillverkarens behov och funktionalitet av tillgänglig CAD / CAM-programvara och de identifierade förbättringsområdena från arbetsflödesutredningarna. Den föreslagna lösningen, som presenterades i prototypen, har validerats tillsammans med tre av de studerade företagen. Vid sitt nuvarande tillstånd behövs ytterligare förbättringar och valideringar. Om den vidareutvecklas har den dock potentialen att skapa värde för hela tillverkningskedjan.
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Pepin, Faustin. « Obrobitelnost kompresních kol z titanových slitin ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230048.
Texte intégralRésumé :
Nespornou vyhodou počítačem podporované výroby (CAM) je výrazná časová úspora při přípravě obráběcího programu. Asociativita je jedním z řešení, její místo v rámci přípravy výrobku se nachází mezi hlavní konstrukcí a technologií podniku. Pro studium asociativity byl použity CAD/CAM modely kompresoru, který díky své komplexní geomtrii posloužil jaky dobrý příklad. Tato práce se podtrhuje omezené možnosti asociativity, především pokud jde o realizaci obráběcího programu pro součást tvořenou více prvky. Dále v této studii budou prezentovány jisté možnosti zlepšení procesu. Studie asociativity v této práci je zaměřena především na obrábění, tedy její aplikace jsou využívány zejména ve oborech jako je automobilový průmysl, letectví, kosmický průmysl či stavebnictví. Kompresor studovaný v této práci je vyroben ze slitiny titanu Ti-6Al-4V a jedná se o součást využívanou v kosmickém průmyslu. Jelikož se jsou jeho rozměry velmi malé, jsou pro jeho obrábění nezbytné velmi přesné nástroje a vysoké řezné rychlosti. Tato práce představuje odlišné strategie obrábění navrhnuté pro výrobu kompresoru, společně s analýzou výsledků. Po počáteční přípravě výroby následují dvě hlavní etpy : editace programu v CATII V5 a jeho ověření v NCSimul8.
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吳偉明 et Wai-ming Micky Ng. « Orientating, tessellating and direct slicing of 3D CAD models : improving accuracy and efficiency forrapid prototyping process ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31219767.
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Larson, Jonathan Karl. « CAD tool emulation for a two-level reconfigurable cell array for digital signal processing ». Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Fall2005/j%5Flarson%5F120805.pdf.
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Thibault, William Charles. « Application of binary space partitioning trees to geometric modeling and ray-tracing ». Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/9142.
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鄺建華 et Kin-wa Kwong. « Computer-aided parting line and parting surface generation in mould design ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31233119.
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Poll, Marcia Trojan. « UMA METODOLOGIA PARA AUTOMAÇÃO DO PROCESSO DE CONFORMAÇÃO POR CALANDRAS ». Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/8084.
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The present work presents the development of a methodology for transforming conventional roll benders of industrial tubes and plates into an equipment with a programmable automatic system for bending parts with fixed and/or changeable rays. A conceptual mechanical project (without details) is presented and computational resources were
implemented for recognition of drawings defined in a system of computer aided design with the objective of automatically generating the task-program, being capable of making the conformation of the projected part. This way, the requirement of programmable operation is
satisfied and the equipment will work according to principles of numerical command machines. Besides that, the proposal considers the necessary adjustment in the machine operational parameters because of the material springback through the image processing extracted from a photo of the conformed part. Thus, the ray executed in the part is recognized and makes it possible to compare it with the projected ray. According to this study, the system
was implemented as an applicative of CAD system for the technique viability analysis and was concluded to be viable, since the programming methodology was implemented
successfully and the results were satisfactory, the user can draw a part in a CAD system and a program CNC is generated for the execution of the part. Other related and important aspects for the development of the methodology are discussed, such as: CNC programming, image
processing, CAD programming systems and the process of mechanical forming to bend tubes or plates.O presente trabalho apresenta o desenvolvimento de uma metodologia para transformar calandras de tubos e chapas convencionais em equipamentos com sistema automático programável para execução de peças com raios fixos e/ou variáveis. É apresentado um projeto mecânico conceitual (sem detalhamento) e são implementados recursos computacionais para reconhecimento de desenhos definidos em sistema de projeto auxiliado por computador com o objetivo de gerar automaticamente o programa-tarefa capaz de executar a conformação da peça projetada. Desta maneira, o requisito de operação programável é satisfeito fazendo com que o equipamento trabalhe segundo os princípios de máquinas CNC. A proposta considera ainda o ajuste necessário nos parâmetros de operação da máquina devido a recuperação elástica do material através do processamento de uma imagem extraída de uma foto da peça conformada. Desta forma, o raio executado na peça é reconhecido e torna-se possível compará-lo com o raio projetado. Conforme demonstra o estudo, para análise da viabilidade técnica da proposta, o sistema foi implementado na forma de aplicativo de sistema CAD e conclui-se ser viável, já que a metodologia de programação foi implementada com sucesso e gerou resultados satisfatórios, onde o usuário desenha uma peça em sistema CAD e um programa CNC para a execução da peça é gerado. Outros aspectos relativos e importantes para o desenvolvimento da metodologia são discutidos, tais como: programação CNC, processamento de imagens, programação em sistemas CAD e processo de conformação mecânica para curvar tubos ou chapas.
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Sturnick, Gerald R. « Integration of computer-aided design techniques into the mechanical product development process / ». Online version of thesis, 1989. http://hdl.handle.net/1850/10477.
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Karim, Mohammed R. « An IDEFO representation of a garment manufacturing system design process ». Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1178127341.
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Baum, Robert Adam. « A tolerance representation scheme for solid models ». Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/18180.
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Сивоконь, М. Л. « Розробка методологічних принципів проектування та виготовлення індивідуальних ортезів для ходіння з м’яких пластичних матеріалів ». Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75509.
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Пояснювальна записка виконана на 37 сторінках машинного тексту і включає 26 рисунків, 1 таблиця, 3 додатки, 12 використаних джерел.
Робота присвячена питанню проектування та технології виготовлення виробів медичного призначення, а саме індивідуальних ортопедичних устілок (ортезів стопи для ходіння) з м’яких полімерних матеріалів. На основі аналізу існуючих технологій виготовлення доведено доцільність впровадження технології з використанням CAD/CAM систем. Проаналізовано вплив режимів різання та траєкторій обробки етиленвінілацетату на якість обробленої поверхні.
Мета роботи. Метою роботи є розробка методологічних принципів проектування та виготовлення індивідуальних ортезів для ходіння з м’яких пластичних матеріалів.
Об’єкт дослідження. Технологічний процес виготовлення індивідуальних ортопедичних устілок.
Предмет дослідження. Індивідуальні ортопедичні устілки (ортези).
Методи дослідження. Результати, отримані на основі теоретичних та експериментальних дослідженнях. Тривимірну модель індивідуальних ортопедичних устілок розроблено в спеціалізованому середовищі OrthoModel. Візуалізацію механічної обробки та написання керуючої програми для фрезерного верстату з ЧПК відтворено в середовищі ArtCam.
Наукова новизна отриманих результатів. Набуло подальшого розвитку виготовлення індивідуальних ортопедичних устілок за технологією CAD/CAM.
Практичне значення отриманих результатів полягає в тому, що на основі теоретичних та експериментальних досліджень, були розроблені оптимальні умови механічної обробки м’яких пластичних матеріалів, що забезпечують потрібні параметри точності при механічній обробці індивідуальних ортопедичних устілок.Пояснительная записка выполнена на 37 страницах машинного текста и включает 26 рисунков, 1 таблица, 3 приложения, 12 использованных источников. Работа посвящена вопросу проектирования и технологии изготовления изделий медицинского назначения, а именно индивидуальных ортопедических стелек (ортезов стопы для хождения) из мягких полимерных материалов. На основе анализа существующих технологий изготовления доказана целесообразность внедрения технологии с использованием CAD / CAM систем. Проанализировано влияние режимов резания и траекторий обработки этиленвинилацетата на качество обработанной поверхности. Цель работы. Целью работы является разработка методологических принципов проектирования и изготовления индивидуальных ортезов для хождения из мягких пластичных материалов. Объект исследования. Технологический процесс изготовления индивидуальных ортопедических стелек. Предмет исследования. Индивидуальные ортопедические стельки (ортезы). Методы исследования. Результаты, полученные на основе теоретических и экспериментальных исследованиях. Трехмерную модель индивидуальных ортопедических стелек разработан в специализированной среде OrthoModel. Визуализацию механической обработки и написание управляющей программы для фрезерного станка с ЧПУ воспроизведен в среде ArtCam. Научная новизна полученных результатов. Получило дальнейшего развития изготовление индивидуальных ортопедических стелек по технологии CAD / CAM. Практическое значение полученных результатов заключается в том, что на основе теоретических и экспериментальных исследований, были разработаны оптимальные условия механической обработки мягких пластичных материалов, обеспечивающих необходимые параметры точности при механической обработке индивидуальных ортопедических стелек.
Degree work: 37 pages, 26 figures, 1 table, 3 applications, 12 sources. Main topic of the thesis is design and manufacturing technology of medical products, namely individual orthopaedic insoles (custom orthotics) made of soft polymeric materials. Has been proved the feasibility of technology implementation using CAD / CAM systems based on the analysis of existing manufacturing technologies. The influence of cutting modes and toolpaths of processing of ethylene vinyl acetate materials on the quality of the treated surface is analysed. The aim of the work. The main aim of the work is to develop methodological principles for the design and manufacture of custom orthotics for walking of soft plastic materials. Object of research. Technological process of manufacturing of custom orthotics. Subject of research. Custom orthotics (individual orthopaedical insoles). Method of research. Results obtained from theoretical and experimental studies. The three-dimensional model of custom orthotics is developed in the specialized environment OrthoModel. Visualization of machining and writing of the control program for the CNC milling machine was reproduced in ArtCam. Originality. A new approach to CAD/CAM technology using for development of custom orthotics is suggested. The practical significance of these results is that, based on theoretical and experimental studies, optimal conditions for the machining of soft plastic materials have been developed that provide the required precision parameters for the machining of individual orthopedic insoles.
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Rangan, Ravi M. « Engineering data integration in a discrete part design and manufacturing environment ». Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/18837.
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Weilnau, Gregory P. « A dynamic scheduling monitor for a manufacturing process / ». Online version of thesis, 1990. http://hdl.handle.net/1850/10600.
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CORDEIRO, Valéria Vital. « Aproveitamento de resíduo de zircônia oriundo do processo CAD/CAM visando aplicação em prótese odontológica ». Universidade Federal de Campina Grande, 2015. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1025.
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CNPq
As indicações das cerâmicas odontológicas se devem as propriedades estéticas. O sistema CAD/CAM permite realizar restaurações cerâmicas, gerando uma elevada quantidade de resíduos, na forma de pó, durante o desbaste e fresa da peça cerâmica, que atualmente é descartado. Este trabalho tem por objetivo estudar o reaproveitamento dos resíduos de zircônia obtidos através do sistema CAD/CAM visando sua aplicação em prótese odontológica. Foi estudado o resíduo proveniente da fresagem de blocos comerciais de zircônia estabilizada com 3% de ítria (3Y-TZP), (sistema Zirkonzahn®), o resíduo caracterizado através da determinação da composição química, difração de raios X, determinação de tamanho de partículas e análise térmica diferencial/gravimétrica. O resíduo beneficiado seguiu duas rotas: desaglomeração em moinho de bolas e sem desaglomeração. Ambos os materiais foram utilizados para confecção de corpos de prova de zircônia queimados a 1180oC em seguida infiltrou-se o vidro de lantânio a 1140oC, os corpos para densificação e os corpos confeccionados extraídos das placas comerciais (Zirkonzahn®) foram queimados em temperaturas de 1300, 1400 e 1500oC após sinterização caracterizados com a determinação da porosidade aparente, microscopia eletrônica de varredura, resistência à flexão em três pontos e microdureza Vickers. Observou-se nos resultados que o resíduo é constituído por zircônia estabilizada com 3% de ítria (3Y-TZP) e matéria orgânica. A desaglomeração diminui o tamanho dos agregados e favoreceu o processo de sinterização, os corpos infiltrados não apresentam resistência adequada para infraestruturas, os corpos sinterizados a 1500oC apresentaram porosidade próxima da obtida pelos corpos de referência. A resistência e a microdureza dos corpos do resíduo atingiram o valor máximo de 1079 HV para os corpos com zircônia não desaglomerada (ZSD) e de 1523 HV para os corpos com zircônia desaglomerada (ZCD), após queima a 1500oC.
The use of ceramics in dental prosthesis is due to the aesthetic properties. The CAD/CAM system allows making ceramic restorations, generating a large amount of waste, in powder form, during the roughing and milling cutter of the ceramic piece, which currently is thrown away. The aim of this work is to study the reuse of the waste obtained from zirconia CAD/CAM system for its application in dental prosthesis. It was studied the residue from the milling of commercial stabilized zirconia blocks with 3% of yttria (3Y-TZP). The residue was characterized by chemical composition, X-ray diffraction, particle size and differential and gravimetric thermal analysis. The improvement residue followed two routes: deagglomeration in a ball mill and without deagglomeration. Both materials were used for preparation of specimens of zirconia. It were sintered at 1180oC then infiltrated with lanthanum glass at 1140oC. The infiltrated specimens and the specimens extracted from the commercial blocks (Zirkonzahn ®) were sintered at temperatures of 1300, 1400 and 1500oC.After sintering its were characterized by apparent porosity, scanning electron microscopy, flexural strength in three points and Vickers micro hardness. It was observed in the results that the residue consists of stabilized zirconia with 3% yttria (3Y-TZP) and organic matter. The deagglomeration decreases the size of the aggregates and favored the sintering process. The infiltrated specimens do not have adequate resistance to infrastructures, the sintered bodies to 1500oC presented close porosity obtained by the scanbodies. Resistance and micro hardness of bodies of waste reached the maximum value of 1079 HV for the bodies with no deagglomeration zirconia (ZSD) and 1523 HV for the bodies with zirconia desaglomerada (ZCD), after burning the 1500oC.
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Sundh, Anders. « Zirconia as a biomaterial for odontological applications : effects of composition and manufacturing processes on fracture resistance ». Doctoral thesis, Umeå universitet, Odontologisk materialvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-37578.
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Background: Ceramics have long been amongst the most biocompatible materials known but their mechanical properties have limited their use. During the past few decades zirconia has aroused particular interest as a biomaterial because of its greater flexural strength, fracture resistance and toughness compared to other bioceramics. Technological inventions and developments have made the processing of zirconia-based ceramics possible and thus also the successful processing of dental restorations constructed from this type of material. The properties of zirconia-based ceramics can, however, be affected by, for example, shape, composition, manufacturing processes and subsequent handling. It was, therefore, of particular interest to study in what way recently introduced zirconia-based ceramics intended for odontological applications could be affected by the shape, manufacturing process, composition, grinding and veneering. Methods: By means of newly invented and developed CAM-Software systems with improvements in grinding technology and strategy and hardware technology, cores for single crowns, fixed partial denture (FPD) frameworks and implant-supported abutments and copies were manufactured from a hot isostatic-pressed (HIPed) yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. In addition, zirconia-based ceramics intended for odontological applications but made from other compositions and/or using different manufacturing techniques were studied. The effects were determined of shape, composition, manufacturing process, heat treatment and veneering of the cores/frameworks on the fracture or bending resistance of various types of ceramic single crowns, FPD frameworks and implant-supported abutments and copies. Results: Different thicknesses in different parts of HIPed Y-TZP cores improved the fracture resistance compared with cores of a uniform thickness resulting in a thicker veneer layer. Machining, heat treatment and veneering affected the fracture resistance of the zirconia-based ceramics studied. In addition, the quality of sintering and composition and type of veneering porcelain used influenced the fracture resistance of zirconia-based ceramics. Conclusion: The results obtained indicate that zirconia-based ceramics have the potential for use as a material in odontological applications. The mechanical properties of zirconia ceramics are, however, affected by, among other things, the shape, composition, manufacturing processes and subsequent handling of the material. These findings have to be taken in consideration in the production processes of zirconia-based ceramic restorations. To further improve their function more studies are needed to elucidate the effects of various manufacturing and handling techniques on the properties of zirconia-based ceramics.
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Yang, Shichen. « Development of digital image analysis and stereological techniques to incorporate microstructural information in finite element based simulations ». Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19137.
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Jain, Vikesh. « A platform independent process data exchange mechanism between Java applications and computer aided manufacturing systems ». Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1081784819.
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Khorami, Massih Tayebi. « Bridging the gap between CAD and CAM by intelligent generative integrated process planning system ». Thesis, University of Strathclyde, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361629.
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Mc, Cormick Josephine. « The application of CAD/CAM technology in the remediation of the viscosity printing process ». Thesis, University of Ulster, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400962.
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余啓明 et Kai-ming Yu. « Dimensioning and tolerancing in geometric modelling ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1990. http://hub.hku.hk/bib/B31232450.
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Yang, Yihong. « Integrated quality control planning in computer-aided manufacturing planning ». Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-041607-164054/.
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Thesis (Ph. D.)--Worcester Polytechnic Institute.Keywords: In-process inspection; tolerance assignment; tolerance stack-up analysis; quality control planning. Includes bibliographical references (leaves 136-148).
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Lynn, Charity M. « Accuracy models for SLA build style decision support ». Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16832.
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Prado, Victor. « Desenvolvimento de um aplicativo em CAD para auxiliar o processo de fabricação em produtos de caldeiraria para hidrelétricas ». Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-01022016-162903/.
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O planejamento da fabricação de peças de caldeiraria para hidrelétricas tais como caixa espiral, tubo de sucção e conduto forçado, necessita de bons conhecimentos em caldeiraria e muita experiência na área devido à complexidade dos cálculos, tornando-se uma tarefa trabalhosa e com muitas possibilidades de erros. A seqüência de operações, no entanto, é altamente repetitiva facilitando o desenvolvimento de um sistema computacional de apoio. O trabalho proposto a seguir tem como objetivo apresentar um sistema desenvolvido como um aplicativo em software CAD para auxiliar as tarefas de projetar e fabricar caixa espiral, tubo de sucção e conduto forçado. O sistema colocou o conhecimento técnico da engenharia industrial de hidrogeradores de uma empresa de bens de capital ao alcance de projetistas desta área, de forma a aumentar a produtividade nestas, e em outras atividades similares, minimizando as possibilidades de erro e padronizando os procedimentos de cálculos. Os resultados foram, entre outros, diminuição do tempo de geração das informações para o processo de fabricação, tais como croquis de delineamento e desenhos de montagem, acima de 90% e perda zero de peças na fabricação.The manufacturing process of hydroelectric weld parts, such as spiral cases, draft tubes and penstocks, demands good knowledge and experience in the area due to the calculations needed, revealing to be a difficult work with a high risk of errors. However, the operation sequence is highly repetitive which enables the development of a computational support system. This thesis has the purpose to present a system developed as an application in CAD software to aid the projecting and manufacturing activities of the spiral boxes, draft tubes and penstocks. Such system was disposed to the technical body of an industrial engineering department maintained by a heavy equipment company which manufactures hydro generators, so professionals were able to increase their productivity, being the system also used in similar areas, minimizing possibilities of mistakes and standardizing calculations procedures. Results were, among others, decrease of time needed to develop process information, such as sketch outlines and assembly drawings, above 90% and zero losses on parts production.
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Neerukonda, Narender. « AUTOMATIC SETUP SELECTION AND OPERATION SEQUENCING FOR COMPUTER-AIDED MANUFACTURING SOFTWARE ». Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1132668178.
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Meneghello, Gustavo Pizarro. « Aplicação de um sistema robótico utilizando recursos de sistemas CAD/CAM para o processo de fresamento ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2003. http://hdl.handle.net/10183/6409.
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Sistemas produtivos industriais podem combinar, em células de manufatura, diferentes características de automação de processos permitindo interfaceamento e possibilitando a flexibilização e otimização da manufatura. Nos processos de fabricação, as dificuldades para a execução de processos de usinagem convencional ou mesmo através de comando numérico, quando se dispõe de máquinas adequadas para a fabricação de peças de geometrias complexas, podem limitar a criatividade, bem como dificultar o desenvolvimento do processo produtivo de forma otimizada. As dificuldades encontradas vão desde fixação das peças, necessidades de dispositivos especiais, restrições nos volumes de trabalho de máquinas CNC e mesmo a geração de trajetórias complexas para máquinas com limitações de eixos. Este trabalho propõe uma metodologia alternativa para usinagem, especialmente fresamento, com desenvolvimento de um algoritmo capaz de, através da utilização de recursos de sistemas CAD/CAM, traduzir arquivos gráficos para uma linguagem de programação utilizada em robôs. Na aplicação utilizam-se recursos dos sistemas CAD/CAM para gerar, numa primeira etapa, o código de programação para máquinas-ferramenta de comando numérico e posterior adaptação, para aplicação em sistemas robóticos. Informações de caminhos de ferramenta para usinagem em máquinas CNC são convertidos, através de uma interface computacional, em trajetórias a serem seguidas por uma ferramenta guiada por um manipulador de robô industrial. Os parâmetros de processo são também adequados as restrições dos sistemas robotizados. A viabilidade do sistema proposto é confirmada através de testes realizados em modelos de superfícies complexas, onde o objetivo do referido trabalho foi alcançado.
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Sirirojvisuth, Apinut. « Development of hybrid lifecycle cost estimating tool (hlcet) for manufacturing influenced design tradeoff ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44778.
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In complex aerospace system design, making effective decision requires knowledge from all disciplines, both product and process perspectives. Manufacturing knowledge integration is most valuable during the early phase of the design since designers have more freedom, and design changes are relatively inexpensive. Yet, there is still lack of structured methodology that will allow feedback from the process perspective to show the impact of the design decisions in a quantifiable manner. The major metrics in the design decision as far as process is concerned are cost, time, and manufacturability. To incorporate these considerations in the decision making process without sacrificing agility and flexibility required during conceptual and preliminary design phases, a new set of software analysis tools are proposed. To demonstrate the applicability of this concept, a Hybrid Lifecycle Cost Estimating Tool (HLCET) is developed, and integrated to existing design methodology, Integrated Product and Process Development (IPPD). The ModelCenter suite is used to develop software architecture that seamlessly integrate between product and process analysis tools, and enable knowledge transfer between design phases. HLCET integrates high fidelity estimating techniques like process-based and activity-based into a hierarchical lifecycle cost model to increase the sensitivities of the top-down LCC model to changes or alternatives evaluated at the part or component level where tradeoff is required. Instead of applying arbitrary complexity factor to existing CERs to account for difference material or process selection, high fidelity tool can be used to related product and process parameters specific to the design to generate new result that can then be used to update top-level cost result. This new approach to lifecycle cost estimation allows for a tailored study of individual processes typically required for new and innovative designs. An example of a hypothetical aircraft wing redesign demonstrates the utility of HLCET.
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Al-Haddad, Tristan Farris. « PerFORMance : Integrating Structural Feedback into Design Processes for Complex Surface-Active Form ». Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07102006-111810/.
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Danglade, Florence. « Traitement de maquettes numériques pour la préparation de modèles de simulation en conception de produits à l'aide de techniques d'intelligence artificielle ». Thesis, Paris, ENSAM, 2015. http://www.theses.fr/2015ENAM0045/document.
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Maitriser le triptyque coût-qualité-délai lors des différentes phases du Processus de Développement d’un Produit (PDP) dans un environnement de plus en plus concurrentiel est un enjeu majeur pour l’industrie. Le développement de nouvelles méthodes et de nouveaux outils pour adapter une représentation du produit à une activité du PDP est l’une des nombreuses pistes d’amélioration du processus et certainement l’une des plus prometteuses. Cela est particulièrement vrai dans le domaine du transfert de modèles de Conception Assistée par Ordinateur (CAO) vers des activités de simulations numériques. Actuellement, les méthodes et outils de préparation d’un modèle CAO original vers un modèle dédié à une activité existent. Cependant, ces processus de préparation sont des tâches complexes qui reposent souvent sur les connaissances des experts et sont peu formalisés, en particulier lorsque l’on considère des maquettes numériques riches comprenant plusieurs centaines de milliers de pièces. Pouvoir estimer a priori l’impact de la préparation de la maquette numérique sur le résultat de la simulation permettrait d’identifier dès le début le meilleur processus et assurerait une meilleure maitrise des processus et des coûts de préparation. Cette thèse a pour objectif de relever ce défi en utilisant des techniques d’intelligence artificielles capables d'imiter et de prévoir un comportement à partir d'exemples judicieusement choisis. L’idée principale est d’utiliser des exemples de préparation de maquettes numériques comme entrées d’algorithmes d’apprentissage pour configurer des estimateurs de la performance d’un processus. Lorsqu’un nouveau cas se présente, ces estimateurs pourront alors prédire a priori l’impact de la préparation sur le résultat de l’analyse sans avoir à la réaliser. Afin d'atteindre cet objectif, une méthode a été développée pour construire une base d’exemples représentatifs, identifier les variables d’entrée et de sortie déterminantes et configurer des modèles d’apprentissage. La performance d’un processus de préparation sera évaluée à l’aide de critères tels que des coûts de préparation, des coûts de simulation et des erreurs sur le résultat de l’analyse dues à la simplification des modèles CAO. Ces critères seront les données de sortie des algorithmes d’apprentissage. Le premier challenge de l’approche proposée est d’extraire les données des modèles 3D complétées par des données relatives au cas de simulation qui caractérisent au mieux un processus de préparation , puis d’identifier les variables explicatives les plus déterminantes. Un autre challenge est de configurer des modèles d’apprentissage capables d’évaluer avec une bonne précision la qualité d’un processus malgré un nombre limité d’exemples de processus de préparation et de données disponibles (seules les données relatives aux modèles CAO originaux, aux cas de simulation sont connues pour un nouveau cas). Au final, l’estimateur de la performance d’un processus aidera les analystes dans le choix d'opérations de préparation de modèles CAO. Cela ne les dispensera pas de la simulation mais permettra d'obtenir plus rapidement un modèle préparé de meilleure qualité. Les techniques d’intelligence artificielles utilisées seront des classifieurs de type réseaux de neurones ou arbres de décision. L’approche proposée sera appliquée à la préparation de modèles CAO riches pour l’analyse CFDControlling the well-known triptych costs, quality and time during the different phases of the Product Development Process (PDP) is an everlasting challenge for the industry. Among the numerous issues that are to be addressed, the development of new methods and tools to adapt to the various needs the models used all along the PDP is certainly one of the most challenging and promising improvement area. This is particularly true for the adaptation of CAD (Computer-Aided Design) models to CAE (Computer-Aided Engineering) applications. Today, even if methods and tools exist, such a preparation phase still requires a deep knowledge and a huge amount of time when considering Digital Mock-Up (DMU) composed of several hundreds of thousands of parts. Thus, being able to estimate a priori the impact of DMU preparation process on the simulation results would help identifying the best process right from the beginning, and this will ensure a better control of processes and preparation costs. This thesis addresses such a difficult problem and uses Artificial Intelligence (AI) techniques to learn and accurately predict behaviors from carefully selected examples. The main idea is to identify rules from these examples used as inputs of learning algorithms. Once those rules obtained, they can be used as estimators to be applied a priori on new cases for which the impact of a preparation process can be estimated without having to perform it. To reach this objective, a method to build a representative database of examples has been developed, the right input and output variables have been identified, then the learning model and its associated control parameters have been tuned. The performance of a preparation process is assessed by criteria like preparation costs, analysis costs and the errors induced by the simplifications on the analysis results. The first challenge of the proposed approach is to extract and select most relevant input variables from the original and 3D prepared models, which are completed with data characterizing the preparation processes. Another challenge is to configure learning models able to assess with good accuracy the quality of a process, despite a limited number of examples of preparation processes and data available (the only data known to a new case are the data that characterize the original CAD models and simulation case). In the end, the estimator of the process’ performance will help analysts in the selection of CAD model preparation operations. This does not exempt the analysts to make the numerical simulation. However, this will get faster a simplified model of best quality. The rules linking the output variables to the input ones are obtained using AI techniques such as well-known neural networks and decision trees. The proposed approach is illustrated and validated on industrial examples in the context of CFD simulations
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Ho, Lee-kin Joe, et 何利堅. « Incorporating GIS and CAD technologies in the modelling of three-dimensional urban landscape of Hong Kong ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B42575229.
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Williams, Gavin L. « Improving fit through the integration of anthropometric data into a computer aided design and manufacture based design process ». Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/4328.
Texte intégralRésumé :
For all types of clothing and body worn technologies it is important to consider how they integrate and interact with the complex shapes that form the unique profile of the human body. This interaction determines the fit of these products and it is often difficult to generate a fit that can simultaneously accommodate these complex shapes. Achieving the correct fit is determined by a number of different factors that must be combined appropriately to create the fit associated with a particular product. This is particularly applicable to Personal Protective Equipment (PPE) to ensure it provides protection while maintaining comfort, mobility and good interaction with the surrounding environment. Integrating suitable anthropometric data into the design and manufacture of this type of clothing plays a critical role in achieving a good fit. By using various processes of Computer Aided Design (CAD) and Computer Aided Manufacture (CAM), the detail contained within these data can be quickly and accurately transferred into physical tools. The aim of this study was to demonstrate and validate a method of enhancing the fit of PPE handwear. This has been achieved through an action research strategy using descriptive and practical research methods. The research tools primarily used are case studies, used to demonstrate how manually collected 2D anthropometric data can be used to generate computer models that represent these data in a 3D form. The products of the case studies are tools that have been introduced into the design and manufacture processes of commercial handwear manufacturing environments. The tools have successfully been used to produce gloves using two different manufacturing methods and been assessed to analyse their fit. An improvement in fit for the gloves has been quantified through user trials to determine the level of increased performance afforded to the wearer. The conclusions drawn from the case studies demonstrate that the integration of anthropometric data and CAD/CAM can greatly influence the fit of handwear and improve the iterative processes of its design. However, the data alone does not achieve this as the added integration of tacit knowledge related to glove design is needed to ensure the correct properties are included to the meet the needs of the target population. The methods developed in the case studies have the potential to be applied to other products where fit and interaction with the human body are important design considerations.
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Matejková, Monika. « Komplexní využití konstrukčních podkladů pro CNC programování turbínových skříní ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229269.
Texte intégralRésumé :
This thesis aims at designing a solution to the comprehensive use of construction underlying documents for the CNC programming of turbine casings. The introductory part of the thesis contains a description of the CNC programming and CAD/CAM systems. The following is mapping of the current state of the construction underlying documents, and mapping of the situation in the department of technology in Siemens Industrial Turbomachinery, s.r.o., Brno. The further section presents an analysis of the problem that arose when processing and sharing the construction underlying documents with the aim of streamlining the CNC programming process. The closing part presents the evaluation and conclusions for implementation of the proposed solutions.
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Lu, Liang-Ju. « HESCAD - an interface between HESCOMP and CADAM for the generation of helicopter models ». Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50057.
Texte intégralRésumé :
3-D Interactive CADAM allows for easier construction, modification, analysis, and display of 3-D geometry surfaces and wire-frames. This research forms a basis for preliminary aircraft geometric design using the CADAM system.
The helicopter design program, HESCOMP, originally a batch mode program, was coupled with CADAM via the CADAM data base such that the analysis, design, and redesign of the helicopter geometry and interior equipment geometry can be accomplished interactively. HESCAD, a program which produces the helicopter preliminary design model and enables the interior equipment design process, is developed. It provides a capability to evolve rapidly and refine helicopter configurations generated automatically using output from HESCOMP or interior equipment design by graphically and numerically defining helicopter components through interactive, on line, computer graphic display devices. Helicopter 3-D wireframes are automatically produced for any HESCOMP helicopter geometry output. A method which directs CADAM to analyze the helicopter components and produce weights, centers of gravity, moments and products of inertia and to review the results of the analyses directly on the screen is provided.
This research was sponsored by IBM Corporation Federal Systems Division under contract No. 417503-DE.
This thesis describes and illustrates the HESCAD program. Detailed graphical results are also presented.Master of Science
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Lanka, Somanath. « Object-oriented real time simulation for a manufacturing facility ». Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1178130985.
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De, Lapp James Andrew. « Impact of CAD on the submittal process ». Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1580.
Texte intégralRésumé :
The efficiency and accuracy of design is critical for construction success. The realization of design is dependent on complete and coordinated design documents that are finalized through the submittal process. This process involves the transfer of design intent from the architect and engineer to the specialty trade contractor for the production of shop drawings. The use of information technology to increase the ability to meet this intent is not being fully utilized today. A case study was selected on the campus of Texas A&M University to investigate the impacts of CAD on the submittal process. The project was selected because it utilized both hand and CAD methods to produce shop drawings. The data collected included all contract documents, submittals, submittal logs, and interviews with the project participants. A comparative analysis was made between the shop drawings that were completed by hand and those that were done by CAD. An analysis quantified the number of notes and corrections made by the reviewers during the submittal process. A separate analysis was made of the number of errors in the interpretation and transferring of background information from the contract documents in the shop drawing production. Finally, interviews were conducted with the project participants to determine the cost associated with utilizing CAD to produce shop drawings. Although based on a single case study, the data showed that CAD had important impacts on the submittal process. The data suggests that when CAD is used to produce shop drawings, there are significantly less notes or corrections by the reviewers. It also suggests that the electronic transfer of design data from the architect and engineer to the subcontractor can ensure better design accuracy and lower overall project cost.