CAD/CAPP/CAM集成系统的研究与开发

Research and Development of CAD/CAPP/CAM Integrated System

文章介绍了可实用的CAD/CAPP/CAM集成系统。该系统是由机械产品设计人员 ,工艺人员和数控机床NC编程人员共同努力 ,在商品CAD/CAM软件Pro/ENGINEER平台上开发的。系统由三个子系统组成 :零件信息识别子系统 ,CAPP子系统和自动CAM子系统。零件信息识别子系统从三维零件中提取零件信息 ,CAPP子系统分析零件信息 ,自动生成零件加工工序和工步 ,从刀具数据库中查询刀具及切削用量 ,并完成各工序的工步排序。自动CAM子系统根据CAPP的结果 ,自动生成Pro/ENGINEER的NC工步 ,经过NC仿真后生成零件加工的刀位文件 。

In this paper a practical CAD/CAPP/CAM integrated system is introduced.This system has been developed by mechanical designers,process planners and NC progragmmers on the basis of a commercial CAD/CAM software named Pro/ENGINEER.It consists of three subsystems:Feature Recognition Subsystem,CAPP Subsystem and Automatical CAM Subsystem.In Feature Recognition Subsystem,machining features information of a part is obtained from a three dimensional part.In CAPP Subsystem,machining features information is analyzed,sets and sequences of the process planning are created automatically,tool and cutting parameters for each sequence are selected from tools library,the order of sequences is arranged.In Automatical CAM Subsystem,NC sequences for machining the part are created automatically according to the CAPP result.After the NC sequences in the machining process being simulated,the file of cutter location data is generated.Finally through a post processor,the NC code file is output and transmitted to a NC machine to machine the part. [