面向CAD/CAPP/CAM的特征识别技术  

Feature Recognition Technology for CAD/CAPP/CAM

作　　者：李伟平[1] 谷正气[1] 邓彪[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《中国机械工程》2006年第S1期249-253,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助重点项目(60635020);长沙市科技局重大科技攻关开发项目(K042012-12)

摘　　要：针对当前CAX系统间难以实现产品信息交换和共享的问题,提出基于标准格式文件的加工特征识别方法。利用CAD软件的STEP AP203数据转换接口,获得CAD模型的几何拓扑信息;从零件的B-rep表达中提取加工特征,并将特征及几何拓扑信息写入AP224格式的中性文件,作为CAPP和CAM的标准数据接口;利用Visual C++编程语言和STEP开发工具包ST-Developer进行了特征识别软件的开发,并给出实例以验证方法的有效性。To solve the problem of product data exchange and sharin g among CAx systems, a machining feature recognition method based on standard form at file is presented. Firstly, geometry and topology information of CAD model is obtained from CAD system’s STEP AP203 interface. Secondly, features are extracted from B-rep representation of the part, and then the features, as well as cor responding geometry and topology information,are written into AP224 format neutr al file which is utilized as standard interface for...

关 键 词：STEP AP203 AP224 特征识别 中性文件 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]