一、概况 某产品上有一个螺旋角为45°的梯形内花键(见图1)。 为加工这样的零件,我们收集了一些资料,并走防了有关单位,找到了一些加工螺旋内齿(或花键)的方法,大致有如下几种: 1.在卧式拉床上加工 在活动拉刀杆上装一个螺旋靠模,强迫拉刀在工作过程中旋转,从而拉出内螺旋花键。由于螺旋靠模的直径比拉刀直径大好几倍,因此,在同一导程下,靠模上的螺旋角比拉刀上的螺旋角成比例增大而极易产生“自锁”。 First, an overview of a helical angle of 45 ° trapezoidal internal spline (see Figure 1). In order to process such parts, we collected some information and walked away from the relevant units. We found some ways of machining helical internal teeth (or splines), as follows: 1. Machining on the horizontal broaching machine A helical tool is mounted on the knife bar, forcing the broach to rotate during work, so as to pull out the internal helical spline. Because the diameter of the helical die is several times larger than the diameter of the broach, the helix angle on the die increases proportionally to the helix angle on the broach under the same lead, which can easily cause “self-locking”.