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Dissertations / Theses on the topic 'Jigs and fixtures'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

Reams, Michael Lee Anthony. "An expedient method for performance evaluation of machining fixtures." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/18925.

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2

Li, Bo. "Analysis and synthesis of machining fixture-workpiece systems with multiple frictional contacts." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15956.

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3

Hurtado, José Francisco. "Experimental study of workpiece-fixture contact forces and friction during machining." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16096.

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4

Hurtado, José Francisco. "Modeling and analysis of conformability and static stability in flexible fixturing." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17368.

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5

Satyanarayana, Srinath. "Fixture-workpiece contact modeling for a compliant workpiece." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17874.

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6

Purushothaman, Radhakrishnan. "Sensor based fixture design and verification." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0121103-121815.

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7

Boyle, Iain Mackinnon. "CAFixD: A case-based reasoning method for fixture design." Link to electronic dissertation, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050406-131631/.

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8

Golden, Christopher Lee. "Analysis of form errors in rings of non-uniform cross section due to workholding and machining loads." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22703.

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9

Ghatpande, Puja Sudhakar. "Study of fixturing accessibilities in computer-aided fixture design." Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-080808-195905/.

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10

Schmitt, Robert Joseph. "The design of a flexible fixturing system." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17958.

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11

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

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

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12

Malluck, John Andrew. "Prediction of ring deformation due to fixturing in the turning process." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/16772.

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13

Lazaro, Anthony de Sam. "An expert system for jig and fixture design." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329749.

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14

Burra, Venkata Sai Vijay Krishna, and Vamsi Nallamothu. "Design and Structural Analysis of a Jig-Fixture Assembly for a Tail Wing." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15804.

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15

Thawaba, Sami. "3D Printed Customized Tooling Development Approach." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-103412.

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3D printing technologies have been gaining a lot of popularity in the last fifteen years, technologies like Fused Deposition Modeling (FDM) 3D printing have never been as accessible as they are today, and with the introduction of the desktop 3D printer, the technology is becoming a mainstream tool for developing prototypes and direct part production from a Computer-Aided Design (CAD) file. In an industrial context, the technology is utilized for different purposes, among which is the development and production of customized and task-specific tools. The proposed work in this thesis is an approach to simplify and streamline the development process of customized production tooling and workstation. The approach was used to identify problems and improvement opportunities at a production facility that delivered IT products. Furthermore, the Technical framework included in the proposed approach provided a guiding path to follow for the prototype development of tools to address identified problems. Developed tools and proposed solutions positively affected the production line work procedure and were accepted and adopted. While other solutions required further exploration and iterative cycles as some reluctance was experienced hence it implied changes in the workflow and daily routines.

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16

Syu, Zih-Siang, and 許自翔. "Study of fixtures and jigs improvement of five-axis machining." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3zp5ay.

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碩士
國立勤益科技大學
資訊管理系
105
The global industries have been developing rapidly in recent years, products are created innovatively to meet market demands. However, as the increase of people in environmental awareness, leisure and sports and seeking for differences, forcing traditional manufacturing turn to automation, intelligence. The shafts and angles of a 5-axis processing machine are very sophisticated and shape of parts are often irregular, to maintain high-precision machining, high-precision positioning fixtures are the important tools for five-axis machining. The purpose of this study is to improve the five-axis machining fixtures and jigs to get quicker positioning of work pieces and improve machining accuracy and efficiency. In this research first, through the expert meeting discussing about technology needs and quality requirements and putting into function deployment (QFD). Next, through TRIZ innovative design and patent analysis, proposing high-precision positioning fixtures and jigs to meet the processing requirements of a five-axis processing machine. Finally through fabrication and testing, and comparing the quality performances with traditional fixtures and jigs, it proved that the new ones are fast in positioning and more precise than the former ones.

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17

Kang, Wen-Kuang, and 康文光. "A study of design of automation machine and it's jigs and fixtures." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/47938890242415495064.

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18

"Multi-rigid-body contact dynamics and haptic interaction for fixture loading planning." Thesis, 2005. http://library.cuhk.edu.hk/record=b6074023.

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Dynamics Simulation Engine is the foundation of the whole system. The engine maintains a realistic dynamics scene in either automatic planning or haptic guided planning. It serves as an off-line verification of the planned motion so that the generated scheme can be 'played' with the engine. In this thesis, we developed a three-dimensional dynamics simulation engine based on an extension of the explicit time-stepping scheme and an application of the differential inclusion process introduced by J. J. Moreau. In the engine, we developed the contact propagation method for a general three-dimensional rigid-body system with multiple unilateral contacts without any bilateral constraints.
In our approach, a sequence of applied forces on the mass center of the workpiece is planned. The applied forces will push the workpiece to get in contact with all the locators. For this purpose, we developed a system with two engines, Motion Planning Engine and Dynamics Simulation Engine.
The goal of Motion Planning Engine is to make the workpiece in contact with all the six locators. Here, the workpiece is initially at an arbitrary place with not contact with any locator. The planning follows a simple scheme of monotonously increase the number of contacts with locators. Here we use a two-step scheme. First, finding the velocity of the workpiece that can approach the new locator while maintaining contacts with old locators. This can be formulated as a linear programming problem. Second, finding the applied force to realize such motion. This step is a central issue in the planning because for the rigid-body model, the solution to multiple frictional contacts is generally indeterministic. One possibility is jamming, that is, the applied force cannot move the workpiece even with less than six contacts. In this thesis, we will give criteria to determine whether the jamming will happen, and we will also derive an algorithm to generate the non-jamming applied force.
The thesis presents an approach to the fixture loading planning problem. That is, to plan the applied forces on the workpiece in order for it to be loaded into a manufacturing fixture.
Liu Tong.
"June 2005."
Adviser: Michael Yu Wang.
Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4067.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2005.
Includes bibliographical references (p. 115-124).
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract in English and Chinese.
School code: 1307.

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19

Nee, Andrew Y. C. "Computer-aided Tooling Design for Manufacturing Processes." 2003. http://hdl.handle.net/1721.1/3737.

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Tooling design for manufacturing processes refers to direct tooling for making a part such as molds and dies for injection molded parts and metal stampings, or for supporting machining operations such as jigs and fixtures. This paper summarizes some of the R&D activities in those areas over a period of 20 years in the Department of Mechanical Engineering, National University of Singapore. It is notable that increasing use of computer tools has turned what is used to be known as a “black art” into a discipline embracing both heuristic and scientific analyses.
Singapore-MIT Alliance (SMA)

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