Pitch Point is the intersection of the splinetooth profile with the pitch circle.
节点是键齿的齿廓与节圆的交点。
2
Pitch circle is the reference circle from which all transverse splinetooth dimensions are constructed.
节圆是一个参考圆，花键的键齿的所有的横向尺寸都是以节圆为基础开始计算的。
3
Based on basic theory of maximum error minimum method, double arc parameters for normal tooth outline in rectangle spline hob are optimized to obtain tooth outline in workpiece with minimum error.