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众所周知,汽车,拖拉机的圆锥被动齿轮形状复杂,上下面不对称,按照一般齿轮进行渗碳淬火,不可避免地要产生较大的平面翘曲和内孔变形。为了保证这种齿轮在渗碳淬火后变形量不超过允许范围,目前有些工厂采用渗碳后重新加热,用淬火压床淬火的方法;也有一些工厂采用渗碳后直接淬火再将变形量超差的齿轮(大约占30～50%),重新加热,用淬火压床淬火的方法。以上两种方法,不但需要加热和淬火的专用设备,而且生产率也较低。为了简化工艺,提高生产率,应当设法控制圆锥被动齿轮在渗碳直接淬火后的变形量不超过允许范围。现将我厂在这方面的工
As we all know, cars, tractors conical passive gear complex shape, the upper and lower asymmetric, according to the general gear carburizing and quenching, will inevitably have a greater plane warpage and bore deformation. In order to ensure that the deformation of this gear after carburizing and quenching does not exceed the allowable range, some factories use carburizing and reheating, with quenching press quenching method; there are some plants after carburizing direct quenching and then deformation of ultra-poor Of the gear (about 30 to 50%), reheating, with quenching press quenching method. These two methods not only require special equipment for heating and quenching, but also lower productivity. In order to simplify the process and improve productivity, we should try to control the tapered passive gear in the carburizing direct quenching deformation does not exceed the allowable range. Now I plant in this area workers