curve pitch

Using the curve fitted pitch, the universal calculation module of manufacture data of non-circle gear for all kind of non-circle gear can be got more easily.

利用拟合后的非圆齿轮节曲线，就可以使得所有非圆齿轮加工数据的计算有了通用的计算模块。

Programming by the plane curve unwrapped from the helix curve and cutting layer by layer, we created the variable pitch screw on the 3.5 axis NC milling.

文章基于3.5轴数控铣床，利用螺旋线展开的平面曲线编程，分层切削，加工出变螺距螺纹；

The polar equation of non-circular gear pitch curve, calculation method of center distance, formula of pitch curve length, primary circle radius and pressure Angle is given.

给出了非圆齿轮的节曲线极坐标方程，两齿轮中心距的计算方法，节曲线长度、基础圆半径和压力角的计算公式。