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CAPP (Computer Aided Process Planning) CAPP, usually refers to computer-aided design and documentation of mechanical part manufacturing process. The process design is a bridge and a link connected to the product design and product manufacturing, is an important part of the manufacturing system, has an important influence on the product quality and manufacturing cost. Process designed to generate process documents and data, not only is the basis of the production and processing, and is a basic source of information for production management and operation control system. CAPP is connected to the CAD and CAM, achieve true integrated CAD / CAM key link, is one of the important technical foundation of computer integrated manufacturing system, therefore, the research and application of CAPP technology has important significance. The blade is an important part in the aero-engine, and the key role it plays in the aero-engine energy conversion. Due to the multi-blade varieties, in large quantities, and processing small batch, process management also uses the traditional way, the workload is large and cumbersome, resulting in inefficient, potentially increasing the production cycle of the product and the cost of production. In order to achieve the purpose of reducing technology staff strength, shorten production preparation cycle, reduce production costs, improve production efficiency, the subject of the aero-engine blades CAPP system design and development. The system uses group technology, the use of the information derived first blade process programs, the completion of the process design has been modified, the addition can also scratch to design blades process. This paper determines the the CAPP system overall program suitable for aero-engine blades and discuss the process report output technology and process diagram generation technology and so on. And thus built into the overall framework and system control module, process design, process state, process design, process management, process report output, process resource query and management and user management function module. This paper the design and development of the CAPP system, in line with the actual production of the aircraft engine blades and process documents, design, derived from the audit to the archive of the entire process. This paper analyzes the characteristics of the CAPP system data structure, data model and database construction method; analysis of the relationship between process data and process design, and the relational model, hierarchical model, network model and object-oriented model. After the advantages and disadvantages of the various data models, the system selects the more reasonable of the relational data model. The system uses the Microsoft SQL Server database, and the system functional requirements, design and construct all necessary database technology resources database, process database, user database. The system is a relational database SQL Server 2000 backend server database, as a database front-end development tools in Visual Basic 6.0. C / S mode, the completion of the development of the client software, the mode of interaction, scalability and portability greatly simplify user operation. The system uses ADO data access technology is currently more popular, and each database table fields and operation of the package to the class, which successfully apply the idea of ??object-oriented programming to the design of database applications. The system structure is reasonable, and has a user-friendly interface, and better meet the requirements of the CAPP system.
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