Bending fatigue performance is an important index to evaluate the bearing capacity of gears. Shot peening is an effective way to improve the bending fatigue performance of gears. Many mechanisms at home and abroad have studied the factors affecting the bending fatigue performance of gears.

The original FAW technology center has designed and developed a gear bending fatigue test device, and studied the influence of shot peening process on gear bending fatigue performance. It is believed that the residual stress of gear root strengthened by shot peening is up to 1000 The bending fatigue strength of the gear can be increased by 10% under MPa compared with that of the gear without shot peening; fan Yimei et al. Of Chongqing University studied the influence of shot peening on the residual stress of the tooth root, and thought that shot peening can improve the bending fatigue performance of the gear; Xu Yingqiang et al. Of Northwest University of technology studied the influence of shot peening on the residual stress of the gear wheel, and tested the distribution of the residual stress on the tooth surface.

The effect of shot peening on the bending fatigue of gears was studied through the bending fatigue test.