针对高速轧机中心距变化斜齿圆柱齿轮的啮合状态恶劣问题，考虑齿轮啮合错位量，在 Abaqus 中建立齿轮有限元啮合模型。在典型工况下，进行了轮齿接触仿真分析，研究了中心距变化对齿轮啮合性能参数的影响规律。并在此基础上，对齿面进行优化修形，采用齿向螺旋角修形和起鼓修形，齿廓齿顶修缘的综合修形方法，对比分析修形前后齿轮的啮合性能。结果表明，未修形时齿面偏载严重，中心距增大使得齿轮重合度和齿面接触印痕占比显著下降，最大齿面接触应力、最大齿根弯曲应力及传递误差峰峰值均增加较多，齿轮整体啮合性能下降明显；优化修形后，齿面偏载得到显著改善，最大接触应力、最大弯曲应力及传递误差峰峰值明显下降，齿轮啮合状态得到良好改善，齿面对中心距变化的补偿能力得到增加。

Aiming at the poor meshing state of helical cylindrical gears with changing center distance in high-speed rolling mills, considering gear meshing misalignment, a finite element meshing model of gears has been established in Abaqus. Under typical working condition, the simulation analysis of gear tooth contact has been carried out to study the influence law of center distance change on gear meshing performance parameters. And on this basis, the tooth surface has been optimized for comprehensive modifications including linear reliefs and crowning reliefs in the direction of tooth lead, tip reliefs in the direction of tooth profile. Then , the meshing performance of the gears before and after modification has been comparatively analyzed. The results show that , before tooth surface modifications, the tooth surface bias load phenomenon is serious, and the increase of the center distance makes the contact ratio and the percentage of contact pattern decrease to a large extent, and the maximum contact stress, the maximum root bending stress and the peak-to-peak value of the transmission error increase a lot, the overall meshing performance of the gear decrease obviously in short; After the optimization of modifications, the tooth surface bias load phenomenon is well improved, the maximum contact stress, the maximum bending stress and the peak-to-peak value of transmission error are significantly reduced, the gear mesh condition is well improved and the ability to compensate for changes in the center distance of the tooth surfaces is increased.

TH132.4???????

重庆市杰出青年科学基金项目