冲裁件图形输入系统功能模块的设计

提出了面素拼合辅以线辅入法。其中所设计的每一基本面素均以参软化定义方式存在于用户界面，而以数字模型方式存在于计算机内。在面素的拼合运算(布尔运算)中，提供交、并、差等3种形状算子。参加布尔运算面素可为2个封闭的二维(2D)任意多边形，其交点可有多个(2个以上)。同时提供以逐条线段输入图形的方法。从而提高了系统的工作效率及输入复杂图形的能力。

Design of Input System of Blanked Part Graphs

An algorithm used for piecing basic graphs together and inputting a graph line by line is proposed. Each basic graph included in the system is shown in the interface for users in parametric style and stored in the computer with the style of the numerical model. Three shape operators, union, intersection and defference, are defined in boolean arithmetic between two graphs with colsed contours, which are two dimensional arbitrary ploygons which have more than two intersection points. At the same time, another algorithm which is used to input a graph line by line is offered. In this way, the working efficiency of the system and the ability to input complex graphs are much improved.