This paper analyses the geometrical character of curve of edge of form milling cutter, and infers the mathematical equations of curve, The center coordinates of conical button-shaped are evaluated.
Through geometrical feature analysis of curve and face of model outline, editing object, thus receiving purpose of optimization design.
通过对模型轮廓曲线及表面的几何特性分析，编辑对象，从而达到对设计进行优化的目的。
3
In contrast to other methods, method of NURBS with weights can describe quadratic curve accurately and can be adopted by technology of engineer, but its geometrical characteristics was not obvious.