我厂生产的C618K-1B车床齿轮中,有一种模数为1.5的薄壁齿轮,材质为45钢,齿面要求高频淬火,硬度为HRC43～48,小头公法线长度为11.49~(-0.033),公法线变动量为0.017,其形状如图1所示。这种齿轮小头由于壁太薄,高频淬火后,里孔涨大,公法线增长,公法线变动量严重超差,平均达0.05～0.10毫米,几乎百分之百造成废品。 Among the gears of C618K-1B lathe produced by our factory, there is a thin-walled gear with a modulus of 1.5 and a material of 45 steel. The tooth surface requires high-frequency quenching with a hardness of HRC 43-48 and a small common head length of 11.49 ~ 0.033), the common normal variation is 0.017, its shape shown in Figure 1. This gear small head because the wall is too thin, high-frequency quenching, the hole up, the common law of growth, the public anomalous changes in the amount of serious abnormalities, an average of 0.05 to 0.10 mm, almost 100% of the waste.