The Research And Realizing Of Parameter CAPP System Of The Pressure Vessel

Based on the research of the parametric manufacture technics of the pressure vessel. The woking principle of CAPP and design method of the expert system are also applied into the system design, which synthesize the characteristic of searches CAPP> derive CAPP and creative CAPP. According to the thought of the software project design, a parametric CAPP system of pressure vessel in practice is designed and realized.The main research content of this paper includes five sections, as follow:(1) Study the expression method of the technics information of the pressure vessel, analyse the obtaining way of the technics parameter, realize the parametric design of technics content and the automatic generation of the hour norm.(2) Study the expansion algorithm of the pressure Vessel, realize the automatical generation of the technology specification parameter driven by the design parameter(3) To realize the automatical generation of technology contents based on code and reasoning, research the code of the pressure Vessel and analyse the knowledge expression and reasoning based on pattern.To realize the automatical generation of the welds technology , design the computer infer models based on the weld regular.(4) Research the integration of data and system, to realize automatical processing of information and data of the system.(5) Make a research on the application of the relation technology, which is applied in the manufacture technics of the pressure vessel, and build an applied relation database, which includes design information and manufacture technics information of the pressure vessel.The system realizes the reasoning and decision-making of the technology content using code module and reasoning module. Taking of the technology specification parameter driven by the design parameter, prevent from the mistake of artificial input , improve the technology workout efficiency as well as while establishing products technology. Have optimized resources of the data base, shortenned the cycle for production, and improved the quality of the products. Have realized the integrality and unity of the data in the whole designprocess, Have offered the favorable assurance for unity optimum management of the whole information systems of enterprises.The system has characteristic of intelligent reasoning, parameter designing, automatical information and data integration, researching and adopting the method of parameter design method and automatical taking technology specification parameter driven by the design parameter in this system, the whole design thoughtway of the system have certain suitability and reference value for the design of CAPP systems of products that are similar in the structure and the design parameter is regarded as the kernel of the whole system. At present, the system is successfully used in the pressure Vessel technology design of a enterprise, and has gained the comparatively satisfied result.