使用拉刀式丝锥可以对任何形状、头数和螺距的长内螺纹进行快速切削。这种丝锥柄部上有一个插楔块用的孔,其工作原理如图1所示。刀架上紧固有支架,支架上有一与丝锥柄部相对应的孔。工作时将已镗好内孔的零件套在拉刀式丝锥的柄部上,然后将 Use a broach tap to quickly cut long internal threads of any shape, number of heads and pitch. This taper shank has an insert wedge hole, its working principle shown in Figure 1. The holder is fastened with a bracket, and the bracket has a hole corresponding to the shank of the thread. Work will have been boring parts of the hole in the broach tapping shank, and then