模具3D型腔粗铣加工中的几何约束提取

Fetching geometric restriction of mold 3D pocket in rough milling

在模具3D含岛型腔加工的计算机辅助刀具选择系统中,几何约束提取是刀具选择的前提。基于UGNX和VC++6.0,开发了相交轮廓识别、环的识别以及平面内外环的判别算法,提取了各切削层的基本几何参数,为计算机辅助刀具选择提供了相应的几何约束。

During the computer-aided tool selection system of mold 3D pockets machining with islands, which often contains complicated free-farm surface, the fetching of geometric restriction is the precondition of tool selection. The algorithms of recognizing intersected profiles, loops and distinguishing inside and outside loops for mold 3D pocket in rough milling based on UG NX are explained.The basic geometric parameters, which are needed to select tools, are fetched. These parameters are used as the geometric restriction for the tool selection.