摘要
首先介绍了特征设计的相关概念,然后论述了特征的定义及分类。着重讨论了特征的描述方法及其模型的数据结构,并对形状特征中局部特征的B-rep方法做了改进,同时对Pro/Engineer系统建立的零件特征进行了分析。
It introduces the correlative concept of design based on feature, describes the definition and labeling of features, and discusses the expression format and data structure of model. It ameliorates B-rep methods applied in local feature of form features, and analyses the part feature built in Pro/Engineer system.
