CAD (Computer Aided Design) is one method and technique that uses the computer's hardware and software system to assist people design products or projects. It includes such designing activities as design, plot, project analysis and technological file's execution, etc. It is not only a new designing method but also a multi-subject comprehensively applied new technology. CAPP (Computer Aided Process Planning) is the manufacturing and processing course that uses computer to assist design the parts. In a narrow sense, it mainly refers to the completion of processing design and outputting process regulations. On the basis of analyzing and studying PDM system's function, this thesis carries out the research on the key technology of CAD and CAPP integration. The main research contents are summarized as follows : 1: Study the key technology together with its realization method of CAD/CAPP integrated system based on PDM; build up the product-faced integrated system's framework; realize the integration of the enterprise's applied system that is based on file management and with the shared database as its basis. 2: Construct the knowledge-based product's modularized madel and the product's information management system; study the expression and management technology of the product's design information facing the product's life cycle. 3: Apply the product's structure based information integrated technology and modularized design technology to the construction of CAD subsystem, thus realize the development of deformed product faced CAD subsystem. 4: Adopt the feature and product's structure based parts' information in putting technology to study the product's structure based processing information model construction technology. 5: Adopt such multi-technics decision mixture technology as interaction, searches, recension and creation, etc. with the repository as the core to study the repository based flexible process decision making mode. 6: Study the organic amalgamation technology of the multi-technologies in the CAPP fast development tools system, including the feature and product's structure based parts' information inputting technology, flexible process decision making technology, COM based subassembly technology and modularized process design technology, etc. The following knowledge can be learned from this thesis : 1: How to realize the interconnection and interoperation among distributed application systems, application systems and multi isomeric data source. 2: How to draw ideas and technology of PDM into CAD/CAPP intergradations. 3: How to realize derivative design of products. 4: To improve the ability in dealing multi database documents, the design of program frame and the planning of systematic flow. In this thesis, the following points are unique and creative : 1: The characteristics of integrated technology are stressed, which make CAD and CAPP phases of product design integrate organically. 2: Obtain the CAD mode of the design parts from PDM database. Through the interactive interface offered by the system, finish the parts' information input based on the feature in the way of man-machine interaction. 3: The process data will be more structural and normative, if we make the product structure the basis for CAPP system to organize process design. 4: The organic integration of four decision-making modes by this system will not only meet the advanced manufacturing mode's needs represented by the agile manufacturing, but also the practicality of factory. ______________________________________________________________________________ MOTS-CLÉS DE L’AUTEUR : CAD, CAPP, PDM, the integrated system, twice development

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