指形銑刀(如图1)是用来加工大模数齿輪和人字齿輪的刀具;这种大型齿輪我們加工的特别多。为了节約制造刀具用的高速鋼材料,我們使用的指形銑刀都是采用堆焊制造工艺,用中碳鋼做刀体,在切削刃部堆焊高速鋼。拿加工Z=11齿輪用的M33指形銑刃来說,采用堆焊工艺只需要高速鋼 Finger-type cutter (Figure 1) is used to process large modulus gears and herringbone gears; we have a large number of such large gears. In order to save the manufacture of high-speed steel used in cutting tools, the finger-type milling tools we use are all made of surfacing technology, using medium-carbon steel as the body and surfacing the HSS at the cutting edge. Take processing M = Z = 11 gear with M33 finger milling, surfacing process using only high-speed steel