螺旋老键拉刀的设计与一般直槽花键拉刀有许多不 同之处,拉刀的结构也有显著的不同。现举例来阐述一 下在设计时需要考虑的一些问题。 我们要加工的工件(如图1所示)为三槽左螺旋;开角①=56°;导程L=12B公厘;螺距S=42.67公厘;线间最大位移x=0.05公厘;工件材料是青铜;切长度L=442 Spiral old key broach design and general straight slot spline broach has many differences, broach structure is also significantly different. Here is an example to illustrate some of the issues that need to be considered when designing. The workpiece to be machined (see Figure 1) is a three-slot left-handed spiral with an open angle of ① = 56 °, a lead of L = 12B mm, a pitch of S = 42.67 mm, a maximum displacement of x = 0.05 mm between lines, Workpiece material is bronze; cut length L = 442