以红旗轿车传动轴滑动叉的花键孔(外径φ35~(+0.027),内径φ30~(+0.17),齿槽宽H=3.5~(+0.027),齿数Z=16,齿长L=116)为例,谈谈这个问题。文中未注明单位之尺寸均为mm,编者注。该花键孔在拉削中存在的问题是:精拉后的齿槽侧面严重刮伤,甚至在底径处大块缺肉(图1)。因此,加工出来的尺寸公差也经常超差。几年来虽经多方努力,如改变制件的调质 The spline hole (outside diameter φ35 ~ (+0.027), inner diameter φ30 ~ (+0.17), tooth width H = 3.5 ~ (+0.027), number of teeth Z = 16, tooth length L = 116) as an example, talk about this issue. The text does not indicate the size of the unit are mm, editor’s note. The problem with the spline hole in broaching is that the side of the tooth groove is severely scratched even after finishing, even with large pieces of missing meat at the bottom (Fig. 1). Therefore, the size tolerances are often out of tolerance. Despite several years of hard work, such as changing the quality of parts