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The Research and Implement of the Parametric CAD System Based on KBE

Author: WangDongYan
Tutor: ShiMingHua
School: Tianjin Polytechnic University
Course: Mechanical Design and Theory
Keywords: CAD Based on Knowledge Engineering Object-oriented design Feature-based Parametric Design
CLC: TH122
Type: Master's thesis
Year: 2004
Downloads: 342
Quote: 10
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Abstract


In today's economic globalization, the increasingly competitive market, the era, the development time for new products become a key factor in the ability of the business to win in the fierce competition in the market. Traditional product design process is too dependent on the designer's experience, you need access to a large number of design manual workload and high probability of error. Therefore, traditional CAD systems has been difficult to meet the actual design and production needs. Only the knowledge of product designers into CAD / CAM / CAE / CAPP system, intelligent design is the best solution for enterprises to achieve rapid design. Ideologically proposed expert system design methodology based on knowledge engineering (KBE) in 1980s to designers knowledge into CAD / CAM / CAE / CAPP system. Design gears, sprockets, worm uses a higher frequency of the common parts of the complex structure, the designer needs access to a large number of design manual, simple point, line, surface voxel is repeated in the general CAD systems to create a feature based on composition entity. This has seriously affected the efficiency of the parts of the design. To solve the above problem, this paper introduces the KBE technology, research and development of knowledge-based mechanical common parts in parametric CAD system based on Pro / E platform. The main problems of the study are as follows: (1) study based on knowledge engineering (KBE) technology to achieve two basic content parametric design: a reference knowledge engineering methods to create a model instance; parametric method to establish the mapping of knowledge with the model quickly generate parameter-driven parts. (2) study of object-oriented design methods, and this method was applied to create the part model, the establishment of the Knowledge Base, program design, and other aspects. Research and Implementation of the guidance system of advanced design concepts. (3) feature-based parametric design method, create a library of commonly used parts model, and design knowledge into each model, in order to achieve the design rules, the experience, the combination of the standard model parameters drive mechanism. Using high-level programming language system is based on knowledge of reasoning mechanisms and knowledge reuse. (4) Research Web browser Yue Gen Works (B / S) network-based client / server (C / S) data transmission technology, the application of the overall structure of the C / S mode design system; based C / S establishing the knowledge base and management technology. (5) research and application of Pro / Toolkit Pro / E secondary development of related technologies. Interface communications; Universal Pro / E system with a dedicated common parts between the parametric CAD system and to call the underlying function the way Pro / E, a commonly used part model parameterization drive. (6) Based on the knowledge-based engineering-oriented object technology and research results, development of common parts of the knowledge-based parametric CAD system, and sprocket subsystem, for example, describes the implementation and operation of the system results.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical design, calculation and mapping > Mechanical Design
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