在习惯上,三角花键拉刀的齿升量,也和其他齿形一样,根据工件材料及其极限强度来选用相应的定值,决定齿升量。但这个齿升量的分配方法,存在很大问题。以解放牌汽车转向球面蜗杆的三角花键为例,其几何尺寸为图1所示。拉刀采用一般常规设计和切削条件,使用时,切削力很不均匀,初切的一、二、三三个齿 Traditionally, triangular spline broach tooth lift, but also the same as other teeth, according to the workpiece material and its ultimate strength to choose the appropriate value to determine the tooth lift. However, there is a big problem with the allocation of teeth. Taking the triangular spline of Jiefang license plate steering worm to the spherical worm as an example, the geometric dimension is shown in FIG. 1. Broach general conventional design and cutting conditions, the use of cutting force is very uneven, the first one, two, three teeth