摘要
首先简要介绍了STEP-NC数据模型与STEP的关系以及制造特征、工步等主要概念,概括了铣削模型的基本结构和组织方式。然后介绍了STEP-NC数控程序的格式和特点,重点分析了数据模型中的EXPRESS实体向文件结构的映射问题,并通过实例讨论了STEP-NC数控程序的优缺点。
It describes the STEP-NC data model based on the extension of STEP, introduces some major concepts like manufacturing feature and working step, overviews the data model for milling. It designs the program structure based on STEP-NC, analyzes the mapping of the EXPRESS entities of the data model, develops the NC part program.
基金
山东省自然科学基金资助项目(Y2003F10)
