The design method is inefficient, takes much time, and requires highly of designers, and can only design a preshaving pinion-shaped cutter every calculation.
设计效率低，周期长、计算量相当大，对设计者的要求也较高，而且设计精度也不能很好的保证。
2
On the base, it also put forward the suggestion to correct the convex Angle size of preshaving hob cutter.