Surfaces of gears under combined rolling and sliding motions may suffer a complicated wear process due to the transient time-varying effect along the meshing path. In this paper, a methodology for predicting the wear of tooth surfaces is developed for the spiral bevel gears. In the wear model, the machined surface roughness, mixed lubrication, friction, flash temperature and the dynamic behavior of gears are all considered. Tooth-Contact-Analysis (TCA) method is used to get the time-varying parameters of meshing points along the meshing path. By simulating real movement process, the material is removed according to the Arrhenius equation. First, the distribution of pressure and film thickness is obtained by solving the mixed EHL model. After that, the flash temperature can be computed by the point heat source integration method with the obtained pressure, film thickness and velocity vector. The material removal is based on surface temperature and sliding distance. The numerical results are compared to the ball-on-disk experiments to demonstrate the reasonableness of the present wear model. And it shows that the angle difference between velocity vectors has strong influences on the wear profile. Furthermore, the mechanism of surface wear evolution is investigated systematically in spiral bevel gears. The difference of the wear track between the pinion and gear surfaces is observed. Besides, in the meshing process of tooth surface, the wear along the meshing path is uneven, which appears to be much greater at the engaging-in and engaging-out areas. There is a position with maximum wear rate in the meshing process, and the position is affected by the load and speed.

由于沿啮合路径的瞬时时变效应，在滚动和滑动运动共同作用下的齿轮表面可能会经历复杂的磨损过程。在本文中，为螺旋锥齿轮开发了一种预测齿面磨损的方法。在磨损模型中，机械加工的表面粗糙度，混合润滑，摩擦，飞边温度和齿轮的动态性能都被考虑在内。牙齿接触分析（TCA）方法用于获取沿啮合路径的啮合点的时变参数。通过模拟真实的运动过程，根据Arrhenius方程将物料去除。首先，通过求解混合EHL模型获得压力和膜厚的分布。之后，闪点温度可以通过点热源积分法计算得到的压力，膜厚和速度矢量。材料的去除基于表面温度和滑动距离。将数值结果与圆盘球实验进行比较，以证明当前磨损模型的合理性。结果表明，速度矢量之间的角度差对磨损曲线有很大影响。此外，系统地研究了螺旋锥齿轮的表面磨损演变机理。观察到小齿轮和齿轮表面之间的磨损轨迹不同。此外，在齿面的啮合过程中，沿啮合路径的磨损是不均匀的，这在啮合和啮合区域显得更大。