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Добірка наукової літератури з теми "Manufacturing process of hole-making"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Manufacturing process of hole-making"

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Bajpai, Pramendra Kumar, Kishore Debnath, and Inderdeep Singh. "Hole making in natural fiber-reinforced polylactic acid laminates." Journal of Thermoplastic Composite Materials 30, no. 1 (August 5, 2016): 30–46. http://dx.doi.org/10.1177/0892705715575094.

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Natural fiber-reinforced composite materials are finding wide acceptability in various engineering applications. A substantial increase in the volume of production of these composites necessitates high-quality cost-effective manufacturing. Drilling of holes is an important machining operation required to ascertain the assembly operations of intricate composite products. In the present experimental investigation, natural fiber (sisal and Grewia optiva fiber)-reinforced polylactic acid-based green composite laminates were developed using hot compression through film stacking method. The drilling behavior of green composite laminates was evaluated in terms of drilling forces (thrust force and torque) and drilling-induced damage. The cutting speed, feed rate, and the drill geometry were taken as the input process parameters. It was concluded that all the three input process parameters affect the drilling behavior of green composite laminates. The drill geometry was established as an important input parameter that affects the drilling forces and subsequently the drilling-induced damage.
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Liu, Xiaojun, Yi Hong, Ni Zhonghua, Qi Jianchang, and Qiu Xiaoli. "Process planning optimization of hole-making operations using ant colony algorithm." International Journal of Advanced Manufacturing Technology 69, no. 1-4 (May 29, 2013): 753–69. http://dx.doi.org/10.1007/s00170-013-5067-x.

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3

Mishra, Dileep Kumar, ▪. Rahul, Saurav Datta, Manoj Masanta, and Siba Sankar Mahapatra. "Through hole making by electro-discharge machining on Inconel 625 super alloy using hollow copper tool electrode." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 2 (June 27, 2018): 348–70. http://dx.doi.org/10.1177/0954408918784701.

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A case experimental research on through hole making process on Inconel 625 super alloy by using hollow (tubular) copper tool electrode in electro-discharge machining has been delineated herein. Based on three controllable process variables namely peak discharge current, pulse-on duration, and gap voltage, experiments on through hole making have been carried out following the electro-discharge machining route (die-sinking electro-discharge machining without flushing). In addition to surface morphology, topographical features of the electro-discharge machined work surface have been examined for both internal cylindrical surface of the hole produced and also the external peripheral surface of the removed cylindrical part. The influence of the process parameters have been analyzed on various process performance features like material removal rate, surface roughness, surface crack density, white layer thickness, circularity, radial overcut, and hole taper. An optimal parameter setting has been identified for sound hole making and thereby to improve electro-discharge machining performance. Additionally, energy-dispersive X-ray spectroscopic analysis has been carried out to investigate the extent of carbon enrichment onto the electro-discharge machined work surface of Inconel 625 as affected by the pyrolysis of the dielectric fluid whilst executing electro-discharge machining operation. X-ray diffraction tests have been carried out to compare metallurgy of the electro-discharge machined work surface (various phases/precipitates present in bulk of the matrix material, extent of grain refinement, crystallite size, strain, and dislocation density) with respect to that of “as received” Inconel 625. Results, thus obtained, have also been compared to that of the micro-hardness test data.
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Qiao, Li Hong, Shu Ting Kao, and Yi Xin Zhu. "Manufacturing Process Specification and Collaborative Decision-Making." Applied Mechanics and Materials 251 (December 2012): 79–83. http://dx.doi.org/10.4028/www.scientific.net/amm.251.79.

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A majority of information in manufacturing is the process information which presents mobility. Such information reflects transforming process form materials to products. This research establishes a manufacturing process information model that presents uniqueness, validness, completeness and generality based in PSL. The model can provide necessary process information and related product, material and resource information required by systems for integrating and collaborative decision making. It then enables to build a collaborative manufacturing decision making process model which is capable of utilizing the process information model. By defining logic procedure, data wrapping and service invoking in the decision making process model, multi-manufacturing systems collaborative decision making will be implemented. Such method of manufacturing process information modeling and decision making process modeling is illustrated by examples of the collaborative creation of a part process plan and an assembly process plan considering actual manufacturing environment.
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Luong, L. H. S., and T. Spedding. "An integrated system for process planning and cost estimation in hole making." International Journal of Advanced Manufacturing Technology 10, no. 6 (November 1995): 411–15. http://dx.doi.org/10.1007/bf01179405.

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Porwal, Rajesh Kumar, Vinod Yadava, and J. Ramkumar. "Micro Electrical Discharge Machining of Micro-Hole." Advanced Science, Engineering and Medicine 12, no. 11 (November 1, 2020): 1335–39. http://dx.doi.org/10.1166/asem.2020.2586.

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Анотація:
Advancements in micro-fabrication are characterized by a progressive miniaturization leading towards higher integration. The fabrication of particular size micro hole in difficile to machine engineering materials is one of the most challenging tasks in manufacturing industry. Since micro holes are prepared in the end product therefore the rejection of product due to poor hole quality is not acceptable in modern manufacturing industries. Micro electrical discharge machining has become one of the most promising methods for creating micro features or micro components of any electrical conducting engineering materials in spite of its hardness. The material extraction mechanism in micro electrical discharge machining is due to plasma creation, heat deportation, superheating of both the electrodes and expulsion of material is in the form of debris particles by dielectric fluid during pulse-off time. The micro feature such as micro hole created by micro electrical discharge machining process is useful in industries ranging from automobile to biomedical. In order to improve process efficiency researchers across the globe worked on micro electrical discharge machining Setup development, micro electrical discharge machining of different materials and shapes in general and hole making in particular, and also analyzes different factor that affect process performance. Present paper summarizes research work carried out related to experimentation, modeling and optimization of sinking and drilling micro electrical discharge machining of different materials.
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Li, Shi Peng, Li Cheng Tian, Xu Da Qin, and Shuai Shang. "The Cutting Parameter Optimization in Helical Milling of Ti Alloys with Small Diameter Tools and the Study of their Cutting Performance." Key Engineering Materials 764 (February 2018): 342–50. http://dx.doi.org/10.4028/www.scientific.net/kem.764.342.

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Titanium alloys are widely used in modern aircraft manufacturing. The hole-making technology with high quality becomes a crucial aspect of aircraft assembly. Helical milling process has drawn much attention due to its high machining quality and efficiency. In this work, the cutting performance of small diameter tools (3mm) in helical milling Ti alloy is studied. The parameters of spindle speed, tangential feed speed and pitch (axial feed per revolution) are optimized to reduce cutting force and processing time. The evolutions of the cutting force, burr size, hole side wall roughness and diameter with increasing hole number are investigated. Results show that burr size and hole side wall roughness are much lower than the requirement of aircraft assembly under the optimized parameters of 7000r/min (spindle speeds), 0.1mm (pitch), 0.02mm/tooth (tangential feed). Due to the poor stiffness and large deflection of small diameter tools, excessive hole diameter error is the most prominent problem to be concerned in helical milling process.
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Akula, Sneharika, Sadvidya N. Nayak, Gururaj Bolar, and Vishwanath Managuli. "Comparison of conventional drilling and helical milling for hole making in Ti6Al4V titanium alloy under sustainable dry condition." Manufacturing Review 8 (2021): 12. http://dx.doi.org/10.1051/mfreview/2021010.

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Hole drilling in Ti6Al4V titanium alloy is challenging due to its poor machinability resulting from high-temperature strength and low thermal conductivity. Therefore, an evaluation of the helical milling process is carried out by comparing the thrust force, surface roughness, machining temperature, burr size, and hole diametrical accuracy with the conventional drilling process. The results indicate the advantage of the helical milling in terms of the lower magnitude of thrust force. The holes generated using helical milling displayed a superior surface finish at lower axial feed conditions, while higher axial feed conditions result in chatter due to the tool deformation. Also, the absence of a heat-affected zone (HAZ) under dry helical milling conditions indicates the work surface formation without thermal damage. Besides, a significant reduction in the size of the burrs is noted during helical milling due to lower machining temperature. Analysis of the hole diameter reinforces the capability of the helical milling process for processing H7 quality holes. Consequently, helical milling can be considered a sustainable alternative to mechanical drilling, considering its ability to machine quality holes under dry machining conditions.
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Zhang, Peng, Xing Yu Guo, and Cheng Ge Wu. "Research of Micro Hole Vibration Drilling Process and Experiment." Materials Science Forum 697-698 (September 2011): 161–65. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.161.

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It is always the difficulties for micro hole machining in the machine manufacturing industry, even more in the defense industry. The vibration drilling new craft, with the incomparable advantages in micro hole drilling, is different from the common one. The precision NC micro hole vibration drilling machine is developed, and the micro hole drilling experiments are conducted. The vibration drilling can not only improve the drill life more than ten times compared with the normal one, but also improve the centering ability and position precision.
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Gómez-Gras, Giovanni, Marco A. Pérez, Jorge Fábregas-Moreno, and Guillermo Reyes-Pozo. "Experimental study on the accuracy and surface quality of printed versus machined holes in PEI Ultem 9085 FDM specimens." Rapid Prototyping Journal 27, no. 11 (January 7, 2021): 1–12. http://dx.doi.org/10.1108/rpj-12-2019-0306.

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Purpose This paper aims to investigate the quality of printed surfaces and manufacturing tolerances by comparing the cylindrical cavities machined in parts obtained by fused deposition modeling (FDM) with the holes manufactured during the printing process itself. The comparison focuses on the results of roughness and tolerances, intending to obtain practical references when making assemblies. Design/methodology/approach The experimental approach focuses on the comparison of the results of roughness and tolerances of two manufacturing strategies: geometric volumes with a through-hole and the through-hole machined in volumes that were initially printed without the hole. Throughout the study, both alternates are explained to make appropriate recommendations. Findings The study shows the best combinations of technological parameters, both machining and three-dimensional printing, which have been decisive for obtaining successful results. These conclusive results allow enunciating recommendations for use in the industrial environment. Originality/value This paper fulfills an identified need to study the dimensional accuracy of the geometries obtained by additive manufacturing, as no experimental evidence has been found of studies that directly address the problem of the FDM-printed part with geometric and dimensional tolerances and desirable surface quality for assembly.
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Дисертації з теми "Manufacturing process of hole-making"

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Joshi, Anay. "Geometric Complexity based Process Selection and Redesign for Hybrid Additive Manufacturing." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin151091601846356.

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Hart, S. J. "An empirical investigation of product elimination decision-making process in British manufacturing industry." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382377.

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Mňuková, Eliška. "Tvorba výrobní koncepce pro plánování výrobního procesu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-451202.

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This diploma thesis is focused on examining the activities of production planning and examining the efficiency of the selected machine in the selected company. The theoretical part summarizes the most important findings and methods of lean manufacturing and corrective measures to prevent or eliminate downtime. In the analytical part, the selected machine is examined in terms of the production process, then an analysis of the current state and assessment of the collected data is performed. Furthermore, an analysis of the decision-making process in production planning for a selected machine was performed and shortcomings in planning were assessed. The practical part contains suggestions for removing the identified bottlenecks.
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Kavaratzis, Yiannis. "Deep hole drilling with twist drills: aspects of the CNC process and its real time monitoring and adaptive control." Thesis, Aston University, 1990. http://publications.aston.ac.uk/11935/.

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Deep hole drilling is one of the most complicated metal cutting processes and one of the most difficult to perform on CNC machine-tools or machining centres under conditions of limited manpower or unmanned operation. This research work investigates aspects of the deep hole drilling process with small diameter twist drills and presents a prototype system for real time process monitoring and adaptive control; two main research objectives are fulfilled in particular : First objective is the experimental investigation of the mechanics of the deep hole drilling process, using twist drills without internal coolant supply, in the range of diarneters Ø 2.4 to Ø4.5 mm and working length up to 40 diameters. The definition of the problems associated with the low strength of these tools and the study of mechanisms of catastrophic failure which manifest themselves well before and along with the classic mechanism of tool wear. The relationships between drilling thrust and torque with the depth of penetration and the various machining conditions are also investigated and the experimental evidence suggests that the process is inherently unstable at depths beyond a few diameters. Second objective is the design and implementation of a system for intelligent CNC deep hole drilling, the main task of which is to ensure integrity of the process and the safety of the tool and the workpiece. This task is achieved by means of interfacing the CNC system of the machine tool to an external computer which performs the following functions: On-line monitoring of the drilling thrust and torque, adaptive control of feed rate, spindle speed and tool penetration (Z-axis), indirect monitoring of tool wear by pattern recognition of variations of the drilling thrust with cumulative cutting time and drilled depth, operation as a data base for tools and workpieces and finally issuing of alarms and diagnostic messages.
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Ilkgun, Ozkan. "Effects Of Production Parameters On Porosity And Hole Properties In Laser Sintering Rapid Prototyping Process." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606529/index.pdf.

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Selective laser sintering (SLS) is a rapid prototyping method in which three-dimensional objects are constructed by sintering thin layers of a variety of powdered materials via laser beam. In SLS, as in most other Rapid Prototyping methods, the produced parts exhibit varying degrees of intrinsic porosity due to the discrete nature of layer-by-layer production. Selective scanning and discrete bonding of individual particles or clusters of particles impart local porosity, which is mostly an undesired trait as the part integrity decreases with increased porosity. However, there are a number of emerging or potential applications as in tissue engineering and composite/functionally graded materials, in which part porosity and its control during production are needed. In this study, the manufacturing capabilities of selective laser sintering are investigated towards producing predesigned porous structures using a polymeric powder. The porous structures are characterized in two main categories: regular porous structures, which involve geometries such as predesigned holes and lattice structures that have orderly porous architecture, and irregular porous structures, which exhibit random pore architecture that is intrinsic in all SLS parts. The limitations of producing regular porous structures are investigated, identified and quantified, based on hole size and dimensional accuracy. An experimental analysis based on design of experiments is employed to investigate the effects of processing parameters on the resulting macroscopic pore properties of irregular porous structures. A mathematical relation is developed to quantify and predict the relations between the SLS process parameters: Laser power, hatching distance, laser scan spacing, and the resulting apparent mass density (as a measure of porosity). The subsequent tests verify accuracy of the developed empirical model.
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Attirawong, Walailak. "A framework for international location decision-making in manufacturing using the analytical hierarchy process approach." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268792.

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Zhuang, Yan M. Eng Massachusetts Institute of Technology. "Optimizing the economic efficiency by micro-drill life improvement during deep-hole drilling in the 212-Valve manufacturing process." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85542.

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Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 67).
The micro-drilling process by robodrills in the production of valves at Waters Corporation is the bottleneck caused by the short drill life. This thesis analyzed the chip formation and removal during the process to improve the tool life. The effects of the tool materials, geometry and peck drilling procedures were investigated. Based on these studies, a new micro drill bit, TYl 30, was selected from the commercial market and the test results for drilling 0.2794 mm holes in the workpiece made of 316-stainless steel showed that it lasted for 120 holes, 5 times longer than the currently used drill bit. An experimental study on various peck drilling procedures demonstrated the advantage of the quadratic pecking procedure, further increasing the tool life by 2 times. Upon the implementation of the new drill bit and the quadratic pecking procedure, the 212-Valve production lead time is estimated to be reduced by 11% and the EDM process will not be starved since the bottleneck process has been improved.
by Yan Zhuang.
M. Eng. in Manufacturing
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Rahaman, Farlon J. "A qualitative study into the supplier selection decision-making process in the Malaysian SME manufacturing industry." Thesis, University of Westminster, 2017. https://westminsterresearch.westminster.ac.uk/item/q2471/a-qualitative-study-into-the-supplier-selection-decision-making-process-in-the-malaysian-sme-manufacturing-industry.

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In manufacturing, supplier selection is viewed as the foundation of supply chain management, as the choice of the supplier will inherently affect all other aspects of business. This study explores the supplier selection decision-making process within Malaysian manufacturing firms. Previous studies in supplier selection have focused on company performance and quality management. Preceding research in this field, offers evidence that the application of information technology tools, business intelligence tools and artificial intelligence tools can be beneficial to the supplier selection decision-making process. In particular, the study explores the presence and usage of the information technology tools, business intelligence tools and artificial intelligence tools, to support the supplier selection decision making process in Malaysian SME manufacturing companies. Data for this research has been collected from six cases located in Malaysia, and was lead through semi-structured interviews. The findings present online global marketplaces as a supplier sourcing method, unstructured evaluation methods and supplier selection process. Information technology supports the supplier selection process by the usage of mobile applications and online communication tools to increase the speed of information exchange. Business intelligence presents tools developed in Malaysia, in alignment with the needs of Malaysian SME manufacturers. Artificial intelligence tools presented no usage or presence in these cases. Finally, this study uncovers the impact of Malaysian culture on the supplier selection process and their supporting tools. Amongst the contributions are: an understanding of the supplier selection process in the Malaysian SME manufacturing, shedding light on the supplier evaluation process, supplier selection criteria and supplier sourcing methods. Adding a new dimension to the existing body of literature is the use of ICT and BI tools, which support the supplier selection process. The contributions are of benefit to practitioners, as the components of the study sheds light into a non-western context.
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陳頌富 and Chung-fu Leslie Chan. "Machining process selection and sequencing under conditions of uncertainty." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31214927.

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10

Raghava, Rao Jonnalagadda, Murali Sathish, Rathinam Aravindhan, and Thanikaivelan Palanisamy. "A Novel Preservation-cum-Unhairing Process for Sustainable Leather Manufacturing - 245: An Unconventional Approach in Leather Making." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34198.

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Content: Preservation (or) curing is an important unit process for transportation and storage of raw hides/skins without any deterioration. Popular preservation process is mostly achieved by reducing the moisture content of hides/skins using common salt (NaCl). Usage of salt in preservation process leads to generation of large amount of contaminated salt, total dissolved solids (TDS) and consume huge amount of water for subsequent rehydration step. On the other hand, lime-sodium sulphide based reductive process is commonly employed for the removal of hair from hides/skins. This process leads to generation of lime sludge and possible evolution of toxic hydrogen sulphide gas thereby making the working atmosphere more unpleasant. Several alternative techniques for preservation as well as unhairing process have been developed individually to replace salt and sulfide, respectively. However, a single compound performing dual functions such as preservation and unhairing action in neutral pH conditions has not explored so far. In the present work, a novel formulation has been developed, which possess the both preservation and unhairing potential, and applied on the hides/skins for storage up to 6 months at ambient conditions without dehydration. Low level of sulphide was used during alkaline fiber opening for complete removal of hair. The strength and organoleptic properties are on par with salted skins/hides. The developed process completely eliminates the use of salt and 75% sulphide and also reduces the time and water required for soaking process. The developed system reduces 85% of pollution load discharged from soaking and unhairing processes. Take-Away: One pot system for salt free preservation and low sulfide dehairing for sustainable leather manufacture.
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Книги з теми "Manufacturing process of hole-making"

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1967-, Brennan Attracta, and Browne Jimmie, eds. Strategic decision making in modern manufacturing. Boston: Kluwer Academic, 2004.

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2

D, Booker J., ed. Process selection: From design to manufacture. 2nd ed. Oxford, England: Butterworth-Heinemann, 2003.

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D, Booker J., ed. Process selection: From design to manufacture. London: Arnold, 1997.

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Wang, H. Advanced process control in paper and board making. Leatherhead: Pira International, 1997.

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5

ten, Heuvelhof E. F., and Veld, R. J. in 't., eds. Process management: Why project management fails in complex decision making processes. Boston: Kluwer Academic, 2002.

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6

Sethi, Suresh P. Hierarchical Decision Making in Stochastic Manufacturing Systems. Boston, MA: Birkhäuser Boston, 1994.

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Making it: Manufacturing techniques for product design. 2nd ed. London: Laurence King Pub., 2012.

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Making it: Manufacturing techniques for product design. London: Laurence King Pub., 2007.

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1959-, Zhang Qing, ed. Hierarchical decision making in stochastic manufacturing systems. Boston: Birkhäuser, 1994.

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Making automation work: Successful strategies for managing new technology. New York: Garland Pub., 1992.

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Частини книг з теми "Manufacturing process of hole-making"

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Hedvall, Lisa, and Joakim Wikner. "Decision-Making Process for Buffer Dimensioning in Manufacturing." In IFIP Advances in Information and Communication Technology, 196–203. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29996-5_23.

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Kong, Daeyoung, Seungchoun Choi, and David Dornfeld. "Software Support for Environmentally Benign Mold Making Process and Operations." In Re-engineering Manufacturing for Sustainability, 279–84. Singapore: Springer Singapore, 2013. http://dx.doi.org/10.1007/978-981-4451-48-2_46.

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Kujawińska, Agnieszka, Michał Rogalewicz, Magdalena Diering, and Adam Hamrol. "Statistical Approach to Making Decisions in Manufacturing Process of Floorboard." In Advances in Intelligent Systems and Computing, 499–508. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56541-5_51.

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Albayrak, Neslisah, and Baris Kececi. "Quality Circles and Kaizen Award Evaluation Process Improvement in KALDER: Application of Multi-criteria Decision Making Techniques." In Advances in Manufacturing, Production Management and Process Control, 213–19. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51981-0_27.

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Wang, Zelong, Ken-ichi Tsuji, Toru Tsuji, Yuka Takai, Akihiko Goto, and Hiroyuki Hamada. "Interval Timing Analysis of Behavior Patterns on “Kana-Ami” Making Process." In Advances in Ergonomics of Manufacturing: Managing the Enterprise of the Future, 71–78. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41697-7_7.

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İç, Yusuf Tansel, and Mustafa Yurdakul. "Understanding the Effect of Assignment of Importance Scores of Evaluation Criteria Randomly in the Application of DOE-TOPSIS in Decision Making." In Advances in Manufacturing, Production Management and Process Control, 411–24. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94196-7_38.

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Muiña Dono, Jose Antonio, Adolfo Lamas Rodríguez, and David Chas Álvarez. "DES as Tool for the Decision-Making in an Offshore Manufacturing Foundation Process." In FlexSim in Academe: Teaching and Research, 59–71. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04519-7_5.

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8

Halevi, Gideon. "Hole Making Procedure." In Process and Operation Planning, 231–68. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0259-1_12.

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Halevi, Gideon, and Roland D. Weill. "Hole-making procedures." In Principles of Process Planning, 262–99. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1250-5_13.

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Chandrakumar, Chanjief, Asela K. Kulatunga, and Senthan Mathavan. "A Multi-Criteria Decision-Making Model to Evaluate Sustainable Product Designs Based on the Principles of Design for Sustainability and Fuzzy Analytic Hierarchy Process." In Sustainable Design and Manufacturing 2017, 347–54. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57078-5_34.

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Тези доповідей конференцій з теми "Manufacturing process of hole-making"

1

Miller, Scott F., and Albert J. Shih. "Friction Drilling: A Chipless Hole-Making Process." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21106.

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This paper summarizes the research on friction drilling, a chipless hole making process using the rotating conical tool. Extensive research in experiment, modeling, tool wear, and metallurgical analysis of friction drilling tool and workpiece has been carried out to demonstrate the feasibility of this technology for hole-making in thin metals. The experimentally measured thrust force and torque were analyzed and compared with analytical and finite element modeling results for validation. The microstructures and indentation hardness were characterized on the cross-section of friction drilled holes for different work-materials. For brittle cast metals, effects of workpiece temperature, spindle speed, and feed rate were analyzed. The wear of a tool, which is made of hard carbide material, for friction drilling of carbon steel workpiece, was also studied to demonstrate the capability of a durable tool in the production environment.
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2

Sormaz, Dusan N., Pravin Khurana, and Ajit Wadatkar. "Rule-Based Process Selection of Hole Making Operations for Integrated Process Planning." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85082.

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Process selection as a part of CAPP has captured significant attention in CAPP research. Procedures have been developed for backward and forward algorithms in process selection. Most of these procedures lack the complete integration of process selection into CAPP system. In this paper, we present the results of the development and prototype implementation for process selection module for hole making operations for integration with Math Based Manufacturing System already in use in industrial partner. We have developed architecture and implemented module for rule-based machining process selection of hole making operations. The architecture enables the interface from the Process Selection prototype to Math Based Manufacturing System (APPS). The prototype also includes the user interface for interaction with the process selection procedure. Actions for starting prototype from APPS, performing process selection steps and sending the result back to APPS have been developed and implemented.
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3

Jadhav, Vishwas S., and Ajit D. Kelkar. "Innovative Hole Making Process in Woven Composite Laminates." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11441.

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Abstract This paper proposes an innovative hole making manufacturing method for the composite laminates. The laminates were fabricated using heated vacuum assisted resin transfer molding (HVARTM) technique using plain weave carbon fibers and epoxy resin. Plain weave carbon fabric laminae were stacked together, and five metal pins were inserted in dry fabric at specific distances without causing any damage to the carbon fiber strands. The stacked plies were then infused with epoxy resin to fabricate laminates, which were about 2.6 mm (0.1″) thick. The laminates were cured as per the manufacturer specifications and after curing metal pins were popped out from the laminate. This resulted in holes in the panels without any damage to the continuous carbon fiber strands. The fabricated laminates then were cut into open hole compression coupons using a water jet machine to obtain holes precisely at the center of the coupon. From the remaining panel, ten coupons were machined and half of them were drilled using traditional drilling machine and the remaining half were drilled by nontraditional water jet machining process. The coupons were then tested using ASTM D6484 method to study the mechanical properties of the laminates. The present method shows promising fabrication technique to create holes in the composite laminates without sacrificing the integrity of the continuous fibers.
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4

Wang, J. J., J. L. Hou, F. C. Hsu, Y. Y. Liao, and Steven Liang. "A RSS Method for Estimating Hole Dimension Error in a Batch Micro-EDM Process." In ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31063.

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In an attempt to estimate the spread of errors in an EDM hole making process, a new Root-Sum-Square (RSS) method is proposed to combine the dimensional spread of a batch of electrodes with the over-cut variation in the micro-EDM process. Two sources of errors are commonly associated with an EDM process and contribute to the dimensional accuracy of the EDMed hole: the dimensional variation of the electrodes and the process over-cut error and its variation. Especially in a micro-EDM process, it is often difficult and time-consuming to measure the geometric dimension and tolerance of either a batch of electrodes or holes of small dimensions. By quantitatively establishing the relationship among the spreads in geometric errors of the electrodes and holes and the process capability, this new method provides an analytical tool in predicting hole error and allows allocating the tolerance budget when selecting the appropriate electrode making process, the EDM machine and process parameters. A series of experiments are carried out to establish and verify the RSS method. Given a set of EDM parameters and a batch of electrodes, the process error in the average over-cut and its spread is first obtained by the RSS method. The process error is then verified by separate experiments with electrodes of fixed dimension under the same EDM conditions. The validity of RSS method is further confirmed by experiments under different electrode dimensions. The RSS method is shown to well represent the contribution of both electrode and process errors to the statistical characteristics of the hole dimension. The establishment of this statistical error model should facilitate the design and control of hole quality by balancing the requirements for the dimensional accuracy of the electrodes and the process accuracy in a batch production environment.
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AFANASYEV, ALEXANDER, and NIKOLAY VOIT. "MULTIAGENT SYSTEM TO ANALYSE MANUFACTURING PROCESS MODELS." In Conference on Uncertainty Modelling in Knowledge Engineering and Decision Making (FLINS 2016). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813146976_0072.

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6

Seo, Jaewoo, and Hyung Wook Park. "Experimental Study on Hole Quality of Carbon Fiber Reinforced Plastics during Micro-Hole Drilling Process." In WCMNM 2018 World Congress on Micro and Nano Manufacturing. Singapore: Research Publishing Services, 2018. http://dx.doi.org/10.3850/978-981-11-2728-1_29.

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Senties, Oscar Baez, Alberto Aguilar Lasserre, Fernando Ortiz Flores, Raul Torres Osorio, and Jose Pablo Nuno de la Parra. "A Tool for Decision Making in Manufacturing Process Flexible." In 2008 Seventh Mexican International Conference on Artificial Intelligence (MICAI). IEEE, 2008. http://dx.doi.org/10.1109/micai.2008.29.

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8

Park, Jin-Hyung, Dong-Hoon Chung, Man-Ki Lee, In-Kyun Shin, Seong-Woon Choi, Hee-Sun Yoon, Jung-Min Sohn, J. Fung Chen, and Douglas J. Van Den Broeke. "Development of mask-making process for CLM manufacturing technology." In Photomask and Next Generation Lithography Mask Technology IX, edited by Hiroichi Kawahira. SPIE, 2002. http://dx.doi.org/10.1117/12.476959.

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9

Yang, Jean Y. M., and Ian M. Dudley. "Application of CD-SEM edge-width measurement to contact-hole process monitoring and development." In Microelectronic Manufacturing '99, edited by Anthony J. Toprac and Kim Dang. SPIE, 1999. http://dx.doi.org/10.1117/12.361297.

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10

Whitehead, Brian T., Philip V. Bayly, and Sean G. Calvert. "The Effect of Process Damping On Stability and Hole Form in Drilling." In Aerospace Manufacturing Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-2605.

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Звіти організацій з теми "Manufacturing process of hole-making"

1

Roye, Thorsten. Unsettled Technology Areas in Deterministic Assembly Approaches for Industry 4.0. SAE International, August 2021. http://dx.doi.org/10.4271/epr2021018.

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Increased production rates and cost reduction are affecting manufacturing in all sectors of the mobility industry. One enabling methodology that could achieve these goals in the burgeoning “Industry 4.0” environment is the deterministic assembly (DA) approach. The DA approach is defined as an optimized assembly process; it always forms the same final structure and has a strong link to design-for-assembly and design-for-automation methodologies. It also looks at the whole supply chain, enabling drastic savings at the original equipment manufacturer (OEM) level by reducing recurring costs and lead time. Within Industry 4.0, DA will be required mainly for the aerospace and the space industry, but serves as an interesting approach for other industries assembling large and/or complex components. In its entirety, the DA approach connects an entire supply chain—from part manufacturing at an elementary level to an OEM’s final assembly line level. Addressing the whole process of aircraft design and manufacturing is necessary to develop further collaboration models between OEMs and the supply chain, including addressing the most pressing technology challenges. Since all parts aggregate at the OEM level, the OEM—as an integrator of all these single parts—needs special end-to-end methodologies to drastically decrease cost and lead time. This holistic approach can be considered in part design as well (in the design-for-automation and design-for-assembly philosophy). This allows for quicker assembly at the OEM level, such as “part-to-part” or “hole-to-hole” approaches, versus traditional, classical assembly methods like manual measurement or measurement-assisted assembly. In addition, it can increase flexibility regarding rate changes in production (such as those due to pandemic- or climate-related environmental challenges). The standardization and harmonization of these areas would help all industries and designers to have a deterministic approach with an end-to-end concept. Simulations can easily compare possible production and assembly steps with different impacts on local and global tolerances. Global measurement feedback needs high-accuracy turnkey solutions, which are very costly and inflexible. The goal of standardization would be to use Industry 4.0 feedback and features, as well as to define several building blocks of the DA approach as a one-way assembly (also known as one-up assembly, or “OUA”), false one-way assembly, “Jig-as-Master,” etc., up to the hole-to-hole assembly approach. The evolution of these assembly principles and the link to simulation approaches are undefined and unsolved domains; they are discussed in this report. They must be discussed in greater depth with aims of (first) clarifying the scope of the industry-wide alignment needs and (second) prioritizing the issues requiring standardization. NOTE: SAE EDGE™ Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies of interest to the mobility industry. The goal of SAE EDGE™ Research Reports is to stimulate discussion and work in the hope of promoting and speeding resolution of identified issues. SAE EDGE™ Research Reports are not intended to resolve the challenges they identify or close any topic to further scrutiny.
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2

Seginer, Ido, James Jones, Per-Olof Gutman, and Eduardo Vallejos. Optimal Environmental Control for Indeterminate Greenhouse Crops. United States Department of Agriculture, August 1997. http://dx.doi.org/10.32747/1997.7613034.bard.

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Increased world competition, as well as increased concern for the environment, drive all manufacturing systems, including greenhouses, towards high-precision operation. Optimal control is an important tool to achieve this goal, since it finds the best compromise between conflicting demands, such as higher profits and environmental concerns. The report, which is a collection of papers, each with its own abstract, outlines an approach for optimal, model-based control of the greenhouse environment. A reliable crop model is essential for this approach and a significant portion of the effort went in this direction, resulting in a radically new version of the tomato model TOMGRO, which can be used as a prototype model for other greenhouse crops. Truly optimal control of a very complex system requires prohibitively large computer resources. Two routes to model simplification have, therefore, been tried: Model reduction (to fewer state variables) and simplified decision making. Crop model reduction from nearly 70 state variables to about 5, was accomplished by either selecting a subset of the original variables or by forming combinations of them. Model dynamics were then fitted either with mechanistic relationships or with neural networks. To simplify the decision making process, the number of costate variables (control policy parametrs) was recuced to one or two. The dry-matter state variable was transformed in such a way that its costate became essentially constant throughout the season. A quasi-steady-state control algorithm was implemented in an experimental greenhouse. A constant value for the dry-matter costate was able to control simultaneously ventilation and CO2 enrichment by continuously producing weather-dependent optimal setpoints and then maintaining them closely.
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Slattery, Kevin T. Unsettled Aspects of the Digital Thread in Additive Manufacturing. SAE International, November 2021. http://dx.doi.org/10.4271/epr2021026.

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In the past years, additive manufacturing (AM), also known as “3D printing,” has transitioned from rapid prototyping to making parts with potentially long service lives. Now AM provides the ability to have an almost fully digital chain from part design through manufacture and service. Web searches will reveal many statements that AM can help an organization in its pursuit of a “digital thread.” Equally, it is often stated that a digital thread may bring great benefits in improving designs, processes, materials, operations, and the ability to predict failure in a way that maximizes safety and minimizes cost and downtime. Now that the capability is emerging, a whole series of new questions begin to surface as well: •• What data should be stored, how will it be stored, and how much space will it require? •• What is the cost-to-benefit ratio of having a digital thread? •• Who owns the data and who can access and analyze it? •• How long will the data be stored and who will store it? •• How will the data remain readable and usable over the lifetime of a product? •• How much manipulation of disparate data is necessary for analysis without losing information? •• How will the data be secured, and its provenance validated? •• How does an enterprise accomplish configuration management of, and linkages between, data that may be distributed across multiple organizations? •• How do we determine what is “authoritative” in such an environment? These, along with many other questions, mark the combination of AM with a digital thread as an unsettled issue. As the seventh title in a series of SAE EDGE™ Research Reports on AM, this report discusses what the interplay between AM and a digital thread in the mobility industry would look like. This outlook includes the potential benefits and costs, the hurdles that need to be overcome for the combination to be useful, and how an organization can answer these questions to scope and benefit from the combination. This report, like the others in the series, is directed at a product team that is implementing AM. Unlike most of the other reports, putting the infrastructure in place, addressing the issues, and taking full advantage of the benefits will often fall outside of the purview of the product team and at the higher organizational, customer, and industry levels.
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4

Rouseff, Russell L., and Michael Naim. Characterization of Unidentified Potent Flavor Changes during Processing and Storage of Orange and Grapefruit Juices. United States Department of Agriculture, September 2002. http://dx.doi.org/10.32747/2002.7585191.bard.

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Citrus juice flavor quality traditionally diminishes after thermal processing and continuously during storage. Our prior studies found that four of the five most potent off-aromas formed during orange juice storage had not been identified. The primary emphasis of this project was to characterize and identify those potent flavor degrading aroma volatiles so that methods to control them could be developed and final flavor quality improved. Our original objectives included: 1 Isolate and characterize the most important unidentified aroma impact compounds formed or lost during pasteurization and storage. 2. Determination of thiamine and carotenoid thermal decomposition and Strecker degradation pathways in model solutions as possible precursors for the unidentified off-flavors. 3. Evaluate the effectiveness of an "electronic nose" to differentiate the headspace aromas of from untreated and heat pasteurized orange and grapefruit juices. 4. Use model systems of citrus juices to investigate the three possible precursor pathways (from 2) for flavor impact compounds formed or lost during pasteurization or storage. RESULTS - The components responsible for citrus storage off flavors and their putative precursors have now been identified. Certain carotenoids (b-carotene) can thermally degrade to produce b-ionone and b-damascenone which are floral and tobacco smelling respectively. Our GC-O and sensory experiments indicated that b-damascenone is a potential storage off-flavor in orange juice. Thiamine (Vitamin B1) degradation produces 2-methyl-3-furan thiol, MFT, and its dimer bis(2- methyl-3-furyl) disulfide which both produce meaty, savory aromas. GC-O and sensory studies indicated that MFT is another storage off-flavor. Methional (potato aroma) is another off flavor produced primarily from the reaction of the native amino acid, methionine, and oxidized ascorbic acid (vitamin C). This is a newly discovered pathway for the production of methional and is more dominant in juices than the classic Maillard reaction. These newly identified off flavors diminish the flavor quality of citrus juices as they distort the flavor balance and introduce non-typical aromas to the juice flavor profile. In addition, we have demonstrated that some of the poor flavor quality citrus juice found in the market place is not only from the production of these and other off flavors but also due to the absence of desirable flavor components including several potent aldehydes and a few esters. The absence of these compounds appears to be due to incomplete flavor volatile restoration after the making of juice concentrates. We are the first to demonstrate that not all flavor volatiles are removed along with water in the production of juice concentrate. In the case of grapefruit juice we have documented which flavor volatiles are completely removed, which are partially removed and which actually increase because of the thermal process. Since more that half of all citrus juices is made into concentrate, this information will allow producers to more accurately restore the original flavor components and produce a juice with a more natural flavor. IMPLICATIONS - We have shown that the aroma of citrus juices is controlled by only 1-2% of the total volatiles. The vast majority of other volatiles have little to no direct aroma activity. The critical volatiles have now been identified. The ability to produce high quality citrus juices requires that manufacturers know which chemical components control aroma and flavor. In addition to identifying the critical flavor components (both positive and negative), we have also identified several precursors. The behavior of these key aroma compounds and their precursors during common manufacturing and storage conditions has been documented so manufacturers in Israel and the US can alter production practices to minimize the negative ones and maximize the positive ones.
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