Usually there are three methods can be used to machine the spiral flute of twist drill, such as cutting, torsion, grinding.
通常普通麻花钻的螺旋槽加工有三种方式:切削加工、扭制加工和磨削加工。
Starting from a general case for problems of torsion-bending of a cylinder, a so called crack-cutting method is presented in this paper.
本文从柱体的扭转-弯曲问题的一般情况出发,介绍裂纹切割法的基本思想。