在CAD_CAPP_CAM集成化系统中基于特征零件模型的建立_英文_.doc

第 15 卷第 2 期 1999 年 9 月 天 津 理 工 学 院 学 报 Vol . 15 No2 Sep . 1999 JO URNAL OF TIA NJ IN INSTITUTE OF TEC HNOLO GY 文章编号 : 1004 - 2261 (1999) 03 - 084 - 05 Ξ Esta bl ishing Parts Model Ba sed on Feature on CAD/ CAPP/ CAM Integrated System the L I Qiang , L I Ke - wang , L IU Yan - ling , WAN G Hui (Dep t . of Mechanical Engineering , Tianjin Instit ute of Technology , Tianjin 300191 , China) Abstract The paper int ro duces t hat t he mechanical machining system can be divided into vario us o bject s such as part s , machining p rocesses and manuf act ure reso urces and classified by using t he o bject - o riented technology in t he CAD/ CA P P/ CAM integrated systems p ro duced f ro m so me kinds part s. U sing t he met ho d of shape and surf ace descrip tio n , t he part s feat ures can also be classified in vario us levels. The paper also in2 t ro duces t he p rinciple and met ho d of establishing system mo del o n t he basis of summarsing and inducing in2 terrelatio n amo ng feat ures. The met ho d has been applied to p ractice . Key words Object - Oriented ; CAD ; CA P P ; CAM Int ro ductio n The mo der n design and manuf act ure system is now developing in t he directio n of integrated parallel en2 gineering f ro m t he way of dispersed o rder engineering in t he past . As know n , t he CAD/ CA P P/ CAM sys2 tem researches have achived great develop ment and co me up to advanced technology standards in t he past tens years. But t hey are researched and developed f ro m separate sides in t he p ro ductio n p rocess. They are o n different developing stages. Therefo re , o n t he view of systematic science t hey are independent and sho rt of relatio n each ot her . Fo r example , t hey are different in mo del definitio n , realizing means and sto r2 age met ho d. It is difficult to exchange info r matio n and feed back p ro blems in vario us stages. The reso ures can not be shared. Therefo re , t he research of t he integrat