中文摘要：

针对复杂零件加工特征识别存在拓扑分析复杂、相交特征识别困难的问题,提出了利用CAD系统中以宏命令形式记录的建模过程进行特征识别的新方法。每次特征识别仅对单个建模过程中的几何实体和拓扑实体进行分析,逐一识别零件模型的所有特征,有效避免了传统方法对零件模型的全部几何实体和拓扑实体进行特征识别存在的缺陷。研究了输入数据获取和整理、基于二维草图的特征痕迹识别和特征参数获取的算法。

英文摘要：

There exist problems of complicated topology analysis and difficulty in intersection features recognition for complicated parts.A novel feature recognition method based on part modeling process which was recorded by way of macro command in CAD systems was proposed herein：geometry and topology entities which produced by single modeling process were analyzed in the single feature recognition process and all features in part were recognized based on step by step strategy.The limitation which the entirely geometry and topology entities should be analyzed in traditional method can be avoided.In order to offer a novel design method for intelligent interface for CAD/CAPP,the algorithm for input data acquirement and arrangement,feature hint recognition based on two-dimensional sketch,and feature parameter acquirement were mainly discussed.