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Intelligent
approaches for generating assembly drawings from 3-D computer models of
mechanical products
Computer-Aided
Design Volume 34,
Issue 5, 15 April 2002, Pages 347-355
注意：本论文已经在英文CAD杂志发表，使用者请注明论文出处！
(SCI已经收录本文)
Ke-Zhang
Chen,(a), Xin-An Feng(b) and Lan Ding(b)
a
Department of Mechanical Engineering, The University of Hong Kong, Hong
Kong
b Faculty of Mechanical Engineering, Dalian University of Technology,
Dalian 116024, China
Abstract
In order to reduce the time of mechanical product design and ensure the
high quality of their assembly drawings, this paper develops an
intelligent approach for generating assembly drawings automatically
from three-dimensional (3-D) computer assembly models of mechanical
products by simulating the experienced human designer's thinking mode
with the aid of computer graphics and knowledge-based expert system.
The key issues include the strategies and methods for selecting the
necessary views in an assembly drawing, determining necessary sectional
views in each view, eliminating the unreasonable projective overlap of
the components in each view, and minimizing the numbers of both the
views in an assembly drawing and the sectional views in each view.
Based on the approach, corresponding software prototype was developed.
Finally, it is demonstrated, from an example of the fixture in a
modularized drilling machine, that its assembly drawing was generated
successfully using this intelligent software prototype.
Keywords: CAD; Intelligent CAD; Expert system; Artificial intelligence;
Assembly; Drawing
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Article Outline
1. Introduction
2. Elements and workflow of the intelligent approach
2.1. Assembly model of the mechanical product designed
2.2. Intelligent layout of the assembly drawing
2.3. Automatic generation of 2-D product assembly drawings
3. Technical strategies of expert system for the layout of assembly drawings
3.1. Preliminary data input
3.2. Global database
3.3. Overlap elimination
3.4. Section minimization
3.5. View minimization
4. Data structure of global database in layout expert system
5. Section selection
5.1. Possible locations of sectional views for each component
5.2. Possible regions of sectional views in each view of assembly drawing
5.3. The mathematical model for section selection
5.4. Optimization
6. Elimination of the unreasonable projective overlap of components among
different sections in each view
7. An example
8. Conclusion
References
Vitae
References
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Chen:
Ke-Zhang Chen received his PhD degree from the University of Manchester
(UMIST), UK in 1984. After he had worked at UMIST (UK), East China University
(China), MIT (USA), and the University of California at Davis (USA), he
joined the Department of Mechanical Engineering in the University of Hong
Kong in 1996. His current research interests include design theory and
methodology, concurrent engineering, intelligent CAD, and design for heterogeneous
components.
Feng:
Xin-An Feng received his BS degree from the Department of Mechanical Engineering,
Dalian University of Technology, China, in 1956. He has then been working
in the university, and is now a professor, deputy director of the CIMS
Research Center, standing council member of China Association for Mechatronics
Technology and Applications, and council member of the China Institution
for Production Engineering. His current research interests include CAD/CAM,
intelligent CAD, concurrent engineering, and CIMS.
Ding:
Lan Ding received her BSc degree and MSc degree from the Department of
Mechanical Engineering, Dalian University of Technology, China, in 1989
and 1992 respectively. Since then, she has worked in China Computer Software
Technology and Service Corp. as a software engineering, Lotus (China)
Software Ltd. as a senior system engineer, China Hewlett-Packard Co. Ltd.
as an account manager, and Nortel Networks Beijing Office as a senior
account manager. She is currently studying in McGill University, Canada.
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