内齿轮在高频淬火时最主要的问题是变形,突出表现在量棒测量尺寸M值(图1)的收缩上。为使淬火后M值符合图纸要求,常用方法是加大加热前M值以抵消淬火后的收缩。但受机加工机床及刀具等因素的影响,加热前M值的变动范围往往较大,若高频 The main problem with internal gears during high-frequency quenching is deformation, which is manifested in the shrinkage of the measuring rod size M (Figure 1). In order to quench the M value in line with the drawings, the commonly used method is to increase the value of M before heating to offset the contraction after quenching. However, due to the impact of machine tools and tools, the range of variation of M value before heating tends to be large. If the high frequency