Measures to reduce gear high frequency quenching deformation

The measures to reduce gear quenching deformation are roughly as follows:

1) Prevent the inner hole of the gear from shrinking. Many machine tool factories have summarized their experience in this area. Some machine tool factories require the inner hole shrinkage of gears to be <0.005mm or <0.01mm after quenching. Generally, after high-frequency quenching, the inner hole shrinkage often reaches 0.01-0.05mm; some factories will The inner hole of the spline is preheated first, and then the outer teeth are quenched; some factories add high temperature tempering process to thick-walled gears after rough turning of the tooth blank, and then add high frequency normalizing to generate stress, and then finish turning and pulling the spline. , Gear cutting, gear shaving, high frequency quenching, low temperature tempering, the inner hole can be controlled to shrink within 0.005mm.

2) For gears that are quenched tooth by tooth, the final quenched tooth deforms greatly. Therefore, the method of tooth-by-tooth quenching to reduce deformation is to alternately quench, that is, separate one or two teeth for quenching, and tooth-by-tooth quenching reduces the deformation of the quenched gear.