Research And Development Of PDM Based CAPPTool System In Contemporary Integrated Manufacturing Environment

In Contemporary Integration Manufacturing environment, it is of great importance to provide the enterprise with tool software and design platform to produce the applied CAPP system. Attention is paid on the research and development of CAPPTool system based upon PDM in this paper. And as the development of CAPPTool system based upon PDM, the Contemporary Integration Manufacturing Oriented VIIPP (Visual and Virtual Process Planning) theory is proposed.Based on the projects of "Production Object Oriented CAD/CAPP Data Management System" and "Research and Development of PDM Based CAPPM System", the research of PDM based CAPPTool system has been gone on. In this paper, from the four layers of theory layer, methodology layer, innovation layer and application kyer, attention is paid on theory research as well as on enterprise application.In the theory layer, according to the analysis of CAPP research and application, combining with the theory and development direction of Contemporary Integration Manufacturing, the problems and development tendency of CAPP are discussed. According to the technical uniformity principle and the development methods of CAPP system, the CAPPTool theory is proposed. Based on the analysis of PDM system architecture, the three integration methods: loose coupling method, interface method and functional integration are compared, and the functional integration method is chosen for the PDM based CAPPTool system, which establishes the design principle of CAPPTool system.In the methodology layer, system architecture and implementmechanism of PDM based CAPPTool system is studied. The architecture of CAPPTool system consists of three layers: user interface layer, function layer and data layer, which synthetically uses shell framework, functional modules and development tools as implement method. Using object-oriented technology, the knowledge database, the process database and the manufacturing resource database of PDM based CAPPTool system are designed and implemented. The process design function, the production oriented process information management system and the intelligent process output system are designed and implemented as shell framework or functional modules.In the innovation layer, as the development of PDM based CAPPTool system, the visual theory and virtual theory are applied to CAPP, and the VIIPP theory is proposed. According to the functional requirement of VII PP system, system architecture is studied, and attentions are paid on virtual platform construction and visual process analysis technology in this paper.In the application layer, the implement architecture of CAPPTool system is given, which consists of three phases: applied CAPP prototype construction, prototype perfection and system maintenance. In this paper, Shanghai Automobile Gear Works as the application case, the feasibility of CAPPTool system is proved. Li this case, existent problems and application requirement are first analyzed, then PDM system is implemented in the enterprise, finally the SAGWCAPP system is constructed by CAPPTool system.