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高速钢拉刀一般用于加工内孔(圆孔、花键孔、内齿轮、成型孔)。该种刀具在生产中有一定的难度。因它细而长,细长比一般在1∶20左右,易弯曲,不管是在机械加工中,还是在热处理中都容易引起弯曲,特别是热处理造成的弯曲更大。热处理淬回火后要将拉刀校直到工艺技术要求(长度l≤900,弯曲≤0.25长度l>900,弯曲≤0.30),又要保持拉刀不断,确有一定困难。因为影响刀具弯曲变形的因素很多,如:淬火温度,冷却速度,装夹方法,操作方法,回火、喷砂等都有影响。
High-speed steel broach is generally used for processing the hole (hole, spline hole, internal gear, forming holes). The kind of tool in the production of a certain degree of difficulty. Because of its thin and long, slender than generally around 1:20, easy to bend, whether in machining, or in the heat treatment are easy to cause bending, especially the heat caused by bending more. After quenching and tempering heat treatment, the broach should be calibrated to the technical requirements (length l ≤ 900, bending ≤ 0.25 length l> 900, bending ≤ 0.30), but also to keep the broach, there are indeed some difficulties. Because of the many factors that affect the tool bending deformation, such as: quenching temperature, cooling rate, clamping methods, methods of operation, tempering, sandblasting and so have an impact.