The Research And Application Of CAPP System Based On Workflow

With development of all kind of science technology and global economy, Manufacture have taken place greatly reformation. The traditional manufacture is being changed by advanced manufacture technology. As the center of information integration of manufacturing system, CAPP takes on the important action of information integration and of function coordination. This paper is based on sub-item-CAPP technology and its application of the national application item, and has discoursed upon meaning and theory foundation of CAPP, and has discoursed upon the whole study and development process including the aim of system function, system requirements, the overall conceptual design of project and the detail design in the round.This paper firstly introduced the fundamental theory of CAPP system, the method of CAPP development and the pattern of CAPP development, at the same time introduced the development trend of CAPP system and the defective of current CAPP system. From the point of integration and practicality, general CAPP System based on the workflow was put forward. This paper analyzed the traditional flow procedure of process planning by taking of manufacturability countersign of CAD design files and of examining and approving of process planning design as example. The content of process planning must manage all kind of the flow of process planning, therefore this paper introduced the workflow technology into traditional CAPP system. Under the instruction of concept and function model of workflow, thefunction Frame was presented and AO graph of IDEFO function model for the C APP system based on the workflow was presentedWith the guild of system function aims and requirements, on the base of analyzing and researching the current CAPP system and taking practicability, universality, including information management and being able to be integrated with other system as the principle this system brought forward this CAPP system that combined the process planning system and process information management system into a system, applied work flow management technology to managing work flow procedure and monitoring the task and proposed the specific functions. About the system software structure, this paper analyzed the merit and defect of two-floor C/S structure and multi-floor C/S structure. The module of multi-mode process planning of this system applied multi distributed C/S structure. The module of task assignment and electric blackboard adopted B/S structure, which were designed for the enterprise external communion and was developed using ASP technology. And Upon system realization, the development processes of fundamental data maintenance based on function structure tree, the module of multi-mode process planning, the version management and product structure management were discussed in details. The develop tools of this system mainly included: Delphi 5.0, Visual C++ 6.0 and Visual InterDev 6.0, and used the product of Microsoft SQL Server 7.0 as Database Management system. The whole system was built up using the three-tier structure of COM/DCOM.