一、概述EQ240和 EQ140车的套管叉2202C——051和2201D—051的花键参数如图1所示。该类零件的花键孔是相应车型零件中最深的花键孔,由於其孔径大、齿槽深、齿数多、在拉床上拉削花键孔时拉削力大,过去在生产中经常出现问题。对类似花键孔的中工,以往采用的工 I. Overview Spline parameters of the 2202C-051 and 2201D-051 bushings for the EQ240 and EQ140 vehicles are shown in Figure 1. The spline hole of these parts is the deepest spline hole in the corresponding model parts. Due to its large aperture, deep tooth grooves and large number of teeth, the broaching force is large when the spline hole is broached on the broaching machine. In the past, it often appeared in the production problem. On the similar spline hole workers, the workers used in the past