Studies, Examples And Knowledge-based Fixture Intelligent Cad System

As an important Tooling assembly, fixture shows its more and more important status with the development of modern manufacturing to the flexible direction. Combining with the key item of Advance Technology Development Project of China (863 Program) -"Networked Manufacturing System Developing and Applying in Advanced Technology Industry Area of GuanZhong", the paper has mainly researched hybrid CBR/KBR Reasoning Model of fixture design, and developed a Hybrid Reasoning of Case & Knowledge-Based Fixture Design System. The System is the important part of Networked Manufacturing in Advanced Technology Industry Area of GuanZhong.Based on the analysis of the contents and characters of fixture design, the author proposed a hybrid CBR/KBR fixture design method with CBR as its core, KBR as its assistant, and CBR supporting case-adaptation process. Using the design information, the designer can expect to obtain a satisfactory subset of possible configuration designs of a fixture from the KBR process. Then the designer, using this subset and other information, can expect to obtain a similar design of the fixture from the retrieving case database, finally use CBR adaptation technique to obtain the satisfied design of fixture.Based on the research on the representation of fixture design knowledge and the reasoning method of knowledge-based fixture design, we confirmed a fixture design method with multi-fixture design knowledge and hybrid reasoning methods. And achieved automated choose of the configuration design of fixture based on knowledge.Researched the representation of fixture design cases and the case information model, proposed a code system for the representation, retrieval and the adaptation of fixture design cases- FIXCOD, then, the paper researched the retrieval and the similarity calculation algorithm, finally proposed a CBR cases adaptation model.Based on these researches, the author proposed a hybrid CBR/KBR reasoning model - HCKRM. Based on it developed a Hybrid Reasoning of Case & Knowledge-Based Fixture Design System-CKBFDS with VB6.0 SQL Server2000 based on the CATIA V5R8 platform.