When the gear is running, the accuracy of the tooth profile processing plays a decisive role in the smoothness of the transmission. One of the main factors for evaluating the smoothness of gear work is the gear involute tooth profile error. If the involute tooth profile error is excessive, it will affect the change of the speed ratio of the pair of teeth during the gear transmission from the beginning to the disengagement, that is, the angle error. This corner error is repeated multiple times in each revolution of the gear. It will cause