我厂生产的半轴齿轮(见图),在拉削花键孔时,原来是拉刀从厚端进入,从薄端出去,这样,厚端尺寸为φ40~(+0.08)毫米,而薄端为φ40~(+0.03)毫米,产生0.03毫米的锥度。渗碳淬火时,花键孔薄端收缩比厚端为大,再加上拉削后薄端花键孔本来就小,因而花键孔变形更大。经过试验,我们将拉刀拉削方向改为从 The semi-shaft gear produced by our factory (see photo), when the spline hole is broached, the original broach enters from the thick end and goes out from the thin end. In this way, the thick end is φ40 ~ (+0.08) mm, while the thin The end of φ40 ~ (+0.03) mm, resulting in 0.03 mm taper. When carburizing and quenching, the thin end of the spline hole shrinks thicker than the thick end, and the thin end spline hole is small after broaching, so the spline hole deformation is larger. After testing, we will broach broaching direction from to