Computer Aided Process Planning Based On Process Collaboration

This thesis is based on the Si Chuan's Youth Foundation Item "Process Management Technology Supported Collaborative Design and It's Application in CAD and CAPP (Grant No. 03Zq026-072, 04ZQ026-035)".Process planning is an important part of modern engineering design technology. It has important impact on performance and reliability of product and reducing cost of product. At the same time, Computer Aided Process Planning (CAPP), as information centre of Computer Integration Manufacturing System (CIMS) and bridge between subsystems of concurrent engineering, is becoming more and more important. Traditional CAPP system put emphasis on automation of process. Modern CAPP research paid more attention to adaptability, rebuilding ability, reusing ability, expanding ability, integration of system. At the same time, CAPP system adopted advanced manufacturing elements and design theory so that it's acustomization and agility was expanded.This thesis introduced the fundamental theory of CAPP system, the method of CAPP development and the pattern of CAPP development, discussed CAPP system framework, analyzed flow management of process planning, and expatiated collabrotive design with multipeople and multitask. Based on this analysis, some key design technology and their referenced model was discussed. This technology included workflow management, concurrent design, process management, and collaborative design. Process design system framework based on process collaboration was build.CAPP system based on process collaboration is Web-based distributed designsystem. The thesis discussed the characteristic of middleware, and expatiated XML technology and function of XML data middleware. XML data middleware provided effective approach for imformation between different systems. The author advanced CAPP system integrated framework based on XML data middleware.The author introduced selection principle of development tool and key technology of building system, put emphasis on importance of database design to system and analyzed development process and main modules of this CAPP system. The main modules included product data management, role management, electronic board, task assignment, collaborative process design and output of process document. System provided process edition management and referenced model. This thesis paid attention to role management and acustomization of process document. The technology of building this system mainly included: Java and XML, and used the product of Microsoft SQL Server 2000 as Database Management system. The whole system was built up using the multi-tier structure based on XML data middleware.At present, the research and development of CAPP system based on process collaboration is just completed in the main, so there is still lots of work to be to do in the further development.