中文摘要：

针对同时需要铣削和车削加工的零件,提出一种基于扫体的从设计特征向加工特征转换的统一方法.采用扫体方式重构零件和毛坯模型,并将毛坯与零件之间的差体沿着这些扫体扫掠路径拆分出各种新的加工扫体,最后将这些加工扫体依照它们之间的邻接关系和加工特征形状结构选择合并成加工特征.该方法实现了同一零件中直扫体和回转扫体2种特征的统一转换,能够产生对应各种不同加工方法和方向的加工特征,有利于工艺优化.文中方法已应用于一个CAPP系统,其结果证明了该方法的可靠性.

英文摘要：

This paper presents an approach for converting design features in a part model generated with these systems into machining features. The main characteristics of this method is that it can produce both milling features and turning features with a unified procedure reconstructing swept volumes of those design features. The method consists of three major steps. First, the various types of design features in part and blank models are converted into the forms of swept volumes; then, the delta volumes between blank swept volumes and part swept volumes are decomposed into new swept volumes that capture different cutting-tool moving styles and align with original swept volumes as well as possible; finally, the new swept volumes are merged to different types of machining features according to their adjacency and orientation relationships as well as the structures of the target machining features. The proposed method has been implemented and applied in a CAPP system, and some practical examples show that it can generate a wide range of alternative machining features for process selection and optimization.