Research And Development Of Fixture Design System And Fixture Base Based On CBR

So far, the fixture is still one of the four essential tools (tools, fixtures, measuring, mold) in the manufacture of mechanical and electrical products. Tools and measuring itself has a high degree of standardization, the user only on-demand procurement. The rapid development of the mold has already formed a considerable scale industry. Thus, the traditional fixture has become a bottleneck to product; businesses urgently need to improve the efficiency of fixture design. In view of this situation, this article has developed a practical case-based fixture design system and fixture base, specifically, mainly conducted the following research:First of all, summing up the main design method of computer-aided fixture design at home and abroad, it is proposed mainly based on examples, interactive supplement, the machine tool fixture design.Secondly, it is finished the theoretical knowledge of fixture Design for Machine Tools. Systematic fixture design process and design principles; with matrix-targeted expression of the six principles and positioning errors of expression; in accordance with the theory of freedom of the mechanical stiffness of movement theory, the principle of targeting the establishment of mathematical is modeled.Third, it is demonstrated the feasibility of case-based reasoning approach to fixture design knowledge. In the acquisition and reproduction of fixture design knowledge, the advantages of case-based is analysis; in the knowledge representation of fixture design knowledge, the index to indicate the instance of machine tool fixture; in the retrieval of fixture design knowledge, nearest neighbor method is used to retrieve examples of machine tool fixture. Nearest neighbor method's the weight and the determination of similarity calculation method is given.Finally, detailed 5 parts of the component of fixture library, it is proposed to create template-based three-dimensional model of the fixture; Under the 80/20 rule, it is proposed to use the manual of fixture design as a typical case of library system. It is proposed to use in line with national standards in all parts of the fixture as the fixture library; combined with the main case-based, interactive approach as a supplement to the fixture design fixture design. UG NX5 is a platform for the design, ACCESS2003 as database, VC6.0 as development tools, fixture design system for machine tool and fixture library are developed, and interface and examples of the system are gived.