A Machine Tool Fixture Library Management System Based On Assembly Knowledge Description

Machine tool fixtures are widely used in mechanical processing, and play an important role in ensuring the accuracy of processing, improving productivity, reducing labor intensity and expanding the scope of machine tools technology. In modern society, competition between manufacturing enterprises is getting more and more fierce. With the CAD/CAM technology is applicated widely and developed rapidly, the developing direction of machine tool fixtures design also inevitably towards to intelligence, integration and standardization. The main contents are as follows:1)The first chapter introduces the background, purpose and significance of the subject, and expounds the research status of machine tool fixture library in domestic and abroad. Emphasize the importance and necessity of establishing the assembly library.2) First of all, this chapter describes machine tool fixture in detail. Secondly, based on the Group Technology, the structure, function and process characteristics are analyzed and summarized. According to the classification results, the classification and coding system is constructed. With SolidWorks as the platform, using the top-down design method as well as the assembly tree structure to establish3D models for machine tool fixtures.3) This chapter introduces the definition and basic concept firstly. And then, describes assembly model with two kinds of expression methods:hierarchical modal and relational model. At last, analyzes the assembly relation, and summarizes several relations that are commonly used in the constructional process. Besides that, collects the knowledge of models in machine tool fixtures library management system, gives out the description method of the assembly knowledge in ACCESS database, and their connection style.4) This chapter describes the demanding analysis of the machine tool fixtures library management system, describes the developing steps of the system, proposes the overall plan of software structure. The focus is the physical design of the system database, the tables created in ACCESS are linked each other, which is in order to prepare for the design and achievement of the program.5) With PowerBuilder9.0as the platform, interviews the ACCESS database through the ODBC interface, realizes various functions of the machine tool fixtures library management system.6) This chapter summarizes the paper and prospects further research.