Repair method of gear coupling tooth profile

　　Gear coupling tooth profile restoration is to purposefully cut off the interference part in the matching process from the gear profile, which can reduce the dynamic load and noise, improve the bearing capacity of the gear, and prolong the service life, but the elastic deformation is in the tooth top part. To modify the tooth profile, according to the condition of heavy load, once the modified gear pair is transmitted under light load, it will cause the separation of the matching gap, which will cause the gear to produce impact and knock phenomenon, which will increase the vibration and noise. On the contrary, it further causes the unevenness of the transmission, causing noise and vibration.Insufficiency of tooth profile modification Traditional drum profile modification refers to drum profile modification, which is a common and typical tooth profile modification. Drum tooth profile modification modifies the full tooth width direction, which can compensate for gear manufacturing errors and The elastic deformation of the gear under load can reduce the impact and noise of the gear matching, and reduce the load concentration caused by various factors, thereby making the matching process smooth.However, although the drum shape modification can improve the uneven load distribution during the gear matching process, because the load distribution at both ends of the gear is not the same, and the error is not distributed according to the drum shape, the modification effect is not ideal.For example, this kind of modification can play a better role in the modification of straight tooth matching; but because the length of the helical gear matching line is constantly changing, only the drum shape modification cannot meet the requirements of the helical gear modification.In addition, if the drum shape is too large, the tooth surface will generate high contact stress and accelerate the wear of the gear; if the drum shape is too small, it will not be able to compensate for the tooth alignment error.