关键词: 加工特征, 数据库, 自动编程, 可重构

Abstract: To solve high coupling problem on implementation method of current CNC automatic programming system,a reconfigurable CNC automatic programming system based on machining feature for shop floor was proposed.The definition of machining feature and relationship were discussed,and part model was established.On this basis,the architecture of automatic programming system was built,which consisted of a machining feature database,a human machine interface module and a NC program generation module.Machining feature database was designed to store geometry feature and process feature information with SQL Server Compact Edition.Afterwards,the implementation methods of other two modules were presented from the view of recognition.A system integration scenario with CNC system and server based on industrial personal computer was created to provide guarantee for upgrading and maintenance of this system.The prototype of automatic programming system for 2.5D milling was developed with C#,and was integrated with a FANUC-18M CNC system and a server.The proposed system was tested through a typical part,and the result indicated that it was convenient for the automatic programming system to maintain and upgrade according to particular tasks.

Key words: machining feature, database, automatic programming, reconfigurable