中文摘要：

将数控工艺的设计分成了两大模块，即加工特征级的智能工艺决策过程和加工方法级的派生式数控代码生成。对加工特征进行数控加工工步设计时，辅以加工特征数控工艺决策知识库、机床特征映射库和刀具特征映射库的智能支持，提高了工艺决策的准确性和智能化水平。同时以加工特征为单元，采用参数化编程技术实现数控程序的派生式生成，提高了数控程序设计效率和质量，并有利于数控程序设计的自动化、智能化、模块化。

英文摘要：

In this paper, NC process planning is divided into two parts. They are the process of intelligent decision- making of the machining feature and the NC codes generation by variant of the machining method. The design of process steps of the machining feature are supported by the manufacturing knowledge library, characteristics-machine tool mapping library and characteristics-tool mapping database intelligently, so as to improve the level of intelligent process design. Parametric programming technique is applied to the NC code generation with the machining feature as unit. And this is conducive to the design process of automation, intelligence, modularization.