Development of a computer-aided fixture design system for lightweight grippers in the automotive industry

2016 ◽  
Vol 6 (3) ◽  
pp. 237 ◽  
Author(s):  
Damien Motte ◽  
Håkan Petersson ◽  
Martin Eriksson ◽  
Robert Bjärnemo
Keyword(s):  
Automotive Industry ◽  
Design System ◽  
Fixture Design ◽  
Computer Aided

Development of a Reference Enterprise Model for Fixture Design Information Support in Integrated Manufacturing

Manufacturing ◽  
2003 ◽  
Author(s):  
Fathianathan Mervyn ◽  
A. Senthil Kumar ◽  
Bok Shung Hwee ◽  
Andrew Nee Yeh Ching
Keyword(s):  
Information Exchange ◽  
Manufacturing Systems ◽  
Reference Model ◽  
Information Support ◽  
Design System ◽  
Fixture Design ◽  
Integrated Manufacturing ◽  
Design Information ◽  
Computer Aided ◽  
Machining Fixtures

A crucial factor in the success of developing integrated manufacturing systems lies in the ability to exchange information among the various computer-aided systems. Although a vast amount of research has been conducted on computer-aided fixture design systems, the need for information exchange between a fixture design system and other manufacturing systems has not been dealt with thoroughly. Models for the exchange of information within an enterprise or within an extended enterprise depend on the functionality and behaviour of individual enterprises. One means of developing an information model for an enterprise is to determine the information requirements by modelling the enterprise. However, this results in a monolithic model that is only applicable to that enterprise. As a solution to this drawback, we describe the development of a reference model for fixture design information support, which can be instantiated to be applied to different types of enterprises. We concentrate on machining fixtures and information form the fixture design domain to other domains.

Research on Ontology-Based Knowledge Acquisition and Reuse for Fixture Design

2008 ◽  
Vol 392-394 ◽  
pp. 177-183
Author(s):  
L. Wang ◽  
Guo Fu Yin ◽  
L. Xu
Keyword(s):  
Knowledge Acquisition ◽  
Lead Time ◽  
Design System ◽  
Design Knowledge ◽  
Fixture Design ◽  
Knowledge Processing ◽  
Related Case ◽  
Computer Aided ◽  
Design Systems

Management of fixture design knowledge is vital for improving product quality and reducing product lead time, but there is no efficient and effective mechanism in current computer-aided fixture design systems to integrate fixture design process, to share design resource as well as acquisition and reuse knowledge. Ontology is increasingly seen as a key technology for enabling semantics-driven knowledge processing. On the background of a architecture of fixture design system based on knowledge introduced in the paper, we presented and expatiated a fixture design knowledge acquisition and reuse technology based on ontology, which embeds ontology in current computer-aided fixture design based on knowledge. Finally, the related case study was given.

Automatic Modular Fixture Generation in Computer-Aided Process Planning Systems

2005 ◽  
Vol 219 (10) ◽  
pp. 1147-1152 ◽  
Author(s):  
B Surendra Babu ◽  
P Madar Valli ◽  
A V V Anil Kumar ◽  
D N Rao
Keyword(s):  
Design System ◽  
Fixture Design ◽  
Modular Fixture ◽  
Computer Aided Process Planning ◽  
Software Application ◽  
Prismatic Parts ◽  
Manufacturing Constraint ◽  
Computer Aided ◽  
Design Characteristics ◽  
Fixture Configuration

Fixturing is the most commonly used manufacturing constraint in setup planning. The computer-aided fixture design technique is being rapidly developed to reduce the lead-time involved in manufacturing planning. An automated fixture configuration design system has been developed to select modular fixture components automatically and place them in position with satisfactory assembly relationships. In this paper, an automated fixture generation system for prismatic components is presented. Sequential steps for automatic fixture layout planning for machining setups, focusing on determining the most suitable locating and clamping positions in accordance with the 3-2-1 configuration, considering geometrical and dimensional constraints are presented. A software has been developed which takes two-dimensional-manufacturing drawings of the prismatic components as input and generates fixture design automatically. The modularity concept is incorporated in the developed software application and enables locating positions to be as wide apart as possible. The clamping positions are obtained directly opposite to the respective locators as far as possible. The software is tested successfully with numerous examples of prismatic parts involving similar design characteristics.

FIX-DES: A Computer-Aided Modular Fixture Configuration Design System

1997 ◽  
Author(s):  
W. Ma ◽  
Z. Lei ◽  
Y. Rong
Keyword(s):  
Interactive Design ◽  
Design System ◽  
Configuration Design ◽  
Fixture Design ◽  
Design Modification ◽  
Modular Fixture ◽  
Cad Systems ◽  
Fixture Element ◽  
Computer Aided ◽  
Fixture Configuration

Abstract This paper presents a computer-aided modular fixture design system: FIX-DES. When fixturing requirements are specified as locating/clamping surfaces and points, a fixture configuration will be automatically generated by (1) selecting fixture elements from a fixture element database to form fixture units based on fixture element assembly relationships and (2) placing the fixture units and elements into position on a baseplate while the fixturing requirements and assembly relationships (e.g., hole alignment) are maintained. The fixture element assembly relationships can be automatically established when the geometric models and fixturing functions of the fixture elements are specified so that the FIX-DES system can be easily applied to different fixture systems. The system also provides the interactive design and design modification functions for human expert involvement. The system was developed with core programs in C/C++ and interface programs in a specific CAD environment. The system has been successfully applied in industry and can be easily transferred to other CAD systems. The overall structure of the FIX-DES system is introduced in the paper. The development of the automated fixture configuration design (AFCD) functions are presented in detail. Finally a fixture configura-tion design example is given to illustrate the application of the system.

A Computer-Aided Fixture Design System With Process Planning Integration for Prismatic Parts Manufactured on CNC Machining Centers

1992 ◽  
Author(s):  
S. Prombanpong ◽  
R. L. Lewis ◽  
A. B. Bishop
Keyword(s):  
Process Planning ◽  
Computer Hardware ◽  
Design System ◽  
Fixture Design ◽  
Process Plan ◽  
Computer Aided Process Planning ◽  
Design Considerations ◽  
Computer Aided ◽  
Jigs And Fixtures ◽  
Design Systems

Abstract Jigs and fixtures are indispensable tools in various manufacturing processes. These processes include metal removal, assembly, welding, and inspection processes. Not only do jigs and fixtures facilitate the operations, but also provide quick loading/unloading, proper and consistent supporting and locating of a workpiece. As a result, the workpiece can be manufactured economically in proportion to the volume of production. With the advent of computer aided design and computer aided manufacturing together with an increasing power of both computer hardware and software, computerized fixture design systems become feasible and more sophisticated. The current computerized fixture design systems are developed utilizing several approaches ranging from simple interactive placement of fixture components to sophisticated generative systems. However, one of the common drawbacks of these systems is a lack of process planning integration in the fixture design considerations. As a result, the contradiction between fixture design generated by the computerized fixture design system and a process plan generated by a process planner or by computer aided process planning software always occurs. In other words, the fixture set-ups and workpiece orientation are not congruent to the process plan. This paper serves to discuss a solution to the problem mentioned above. A mathematical model was developed to integrate process planning in fixture design considerations. An optimized fixture design system will be presented and discussed. Examples of tested cases are also presented.

scholarly journals AN INTEGRATED RBR FIXTURE DESIGN SYSTEM

2017 ◽  
Vol 5 ◽  
pp. 1175-1180 ◽  
Author(s):  
Oleg Mihaylov ◽  
Galina Nikolcheva
Keyword(s):  
Design System ◽  
Fixture Design ◽  
Rule Based ◽  
Design Processes ◽  
Modular Fixtures ◽  
Computer Aided ◽  
Cylindrical Parts ◽  
Mathematical Equations

Traditionally fixture design processes are costly and time-consuming when carried out manually. To try to reduce the negative features, we are creating a computer-aided fixture design system, integrated in the SolidWorks’ environment. This system uses rule-based reasoning in the form of If-Then-Else rules, incorporated in its VB.NET code. This paper presents our progress in the form of an interactive add-in program for locating parts. This program generates modular fixtures for locating prismatic or cylindrical parts, using rules and mathematical equations. Its usage can shorten the time needed for determining the type and position of every module of the fixture, their assembling, and inspection.

A CAD-based approach to the design of fixtures for prismatic parts

1997 ◽  
Vol 211 (7) ◽  
pp. 523-538 ◽  
Author(s):  
Y C Jeng ◽  
K F Gill
Keyword(s):  
Computer Aided Design ◽  
Design System ◽  
Fixture Design ◽  
Modular Fixture ◽  
Cad System ◽  
Prismatic Parts ◽  
Design Structure ◽  
Modular Fixtures ◽  
Computer Aided ◽  
Inference Techniques

The design scheme presented utilizes the knowledge representation and inference techniques from artificial intelligence and the geometric modelling technique for modular fixture design on a CAD (computer aided design) system. The fixture design problem is formulated in a hierarchical design structure. A systematic approach for selecting the locating and clamping positions on an automatically generated fixture configuration is outlined for the building of modular fixtures. Modular fixture elements are selected by considering the required function and geometric limitation. The generated fixture layout is then represented in the CAD system. To demonstrate the proposed approach, a prototype AutoCAFD (automatic computer aided fixture design) system is introduced and a practical example is presented.

Structural Analysis of Product and Computer-Aided Assembly Planning in AssemBL Software Package

2018 ◽  
pp. 11-33
Author(s):  
A. N. Bozhko
Keyword(s):  
Computer Aided Design ◽  
State Of The Art ◽  
Graph Model ◽  
Design System ◽  
Assembly Planning ◽  
Complex Products ◽  
Assembly Sequences ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

Computer-aided design of assembly processes (Computer aided assembly planning, CAAP) of complex products is an important and urgent problem of state-of-the-art information technologies. Intensive research on CAAP has been underway since the 1980s. Meanwhile, specialized design systems were created to provide synthesis of assembly plans and product decompositions into assembly units. Such systems as ASPE, RAPID, XAP / 1, FLAPS, Archimedes, PRELEIDES, HAP, etc. can be given, as an example. These experimental developments did not get widespread use in industry, since they are based on the models of products with limited adequacy and require an expert’s active involvement in preparing initial information. The design tools for the state-of-the-art full-featured CAD/CAM systems (Siemens NX, Dassault CATIA and PTC Creo Elements / Pro), which are designed to provide CAAP, mainly take into account the geometric constraints that the design imposes on design solutions. These systems often synthesize technologically incorrect assembly sequences in which known technological heuristics are violated, for example orderliness in accuracy, consistency with the system of dimension chains, etc.An AssemBL software application package has been developed for a structured analysis of products and a synthesis of assembly plans and decompositions. The AssemBL uses a hyper-graph model of a product that correctly describes coherent and sequential assembly operations and processes. In terms of the hyper-graph model, an assembly operation is described as shrinkage of edge, an assembly plan is a sequence of shrinkages that converts a hyper-graph into the point, and a decomposition of product into assembly units is a hyper-graph partition into sub-graphs.The AssemBL solves the problem of minimizing the number of direct checks for geometric solvability when assembling complex products. This task is posed as a plus-sum two-person game of bicoloured brushing of an ordered set. In the paradigm of this model, the brushing operation is to check a certain structured fragment for solvability by collision detection methods. A rational brushing strategy minimizes the number of such checks.The package is integrated into the Siemens NX 10.0 computer-aided design system. This solution allowed us to combine specialized AssemBL tools with a developed toolkit of one of the most powerful and popular integrated CAD/CAM /CAE systems.

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