【摘要】 参数化设计时，必须实时地从零件图中提取图形信息作为参数化建模、约柬求解、图形驱动和图形驱动后尺寸自动标注的依据。本文介绍以AutoCAD为开发平台，进行参数化设计时，图形几何信息和尺寸约束信息获取和处理的方法。更多还原

【Abstract】 In this paper, the composing of CAD/CAM reverse engineering system and its application on dies exploitation are explicated. And This poperucainly dealssrth about the exploitation process of automobile outer covering component dies with the CAD/CAM system of curved surface restructure and the dies machining of NC.更多还原