极径渐开线插补原理

Involute Interpolating Principle of Polar Radius

在分析圆的渐开线形成原理的基础上，建立了极径渐开线插补原理。即先建立圆的渐开线极坐标方程，选择极径为控制核心，以极径增量确定渐开线位置，而后进行插补。

A polar radius interpolating principle is built on the basis of analysis made on circular involute forming principle. The principle is made, at first, the polar equation of circle involute is built and the positions of involute are decided by increments of polar radius to choose polar radius as controlling center, then the involute interpolation is made.