关键词: 自定义加工特征, 箱体零件, CAD/CAPP/CAM集成, 船用柴油机

Abstract: To solve the problem of low-level integration and the inconvenience of information transferring for design and manufacture of marine diesel engine box parts,an approach to construct CAD/CAPP/CAM integration system based on user defined machining feature was proposed.Based on group technology and knowledge engineering principle,the parts'various machining features were roughly classified according to shape characteristics and tool path formation,and the database of user defined machining feature was constructed.For representation,the features were stored and conveyed by property formulation and annotation expression which would be utilized for realizing process decision and NC programming in our featured based integration manner.By using this method,manual interaction could be reduced significantly,and automation levels with great correctness were improved.

Key words: user defined machining feature, box parts, CAD/CAPP/CAM integration, marine diesel