【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。更多还原

【Abstract】 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.更多还原