The fatigue strength of a gear tooth surface is affected by various factors, which subsequently impacts the transmission performance of gears. Usually, shot peening treatment is carried out during processing to improve the performance of gears. Most current studies focus on theoretical descriptions and simulation analyses of shot peening treatment. However, in this paper, the relationships among shot peening treatment, residual stress, and bending fatigue strength of a gear tooth surface are discussed, through experimental methods. Based on X-ray stress analysis, at select locations on the test samples, the residual stresses on gear tooth surfaces with and without shot peening treatment are determined and contrasted. The results show that shot peening treatment can effectively increase the residual stress on gear tooth surfaces. In addition, an electromagnetic resonance fatigue tester is used to analyze the bending fatigue strength of gear tooth surfaces. The test results indicate that the bending fatigue strength of the gear teeth with shot peening is higher than that of the gear teeth without shot peening. The obtained conclusions lay the foundation for further practical engineering applications of gears.

中文翻译：

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喷丸处理后齿轮齿表面残余应力和弯曲强度的实验分析

齿轮齿面的疲劳强度受多种因素影响，随后会影响齿轮的传动性能。通常，在加工过程中进行喷丸处理以提高齿轮的性能。当前大多数研究集中在喷丸处理的理论描述和模拟分析上。然而，本文通过实验方法讨论了喷丸处理，残余应力和齿轮齿表面弯曲疲劳强度之间的关系。基于X射线应力分析，在测试样品的选定位置上，确定并对比经过和不进行喷丸处理的齿轮齿表面上的残余应力。结果表明，喷丸处理可以有效增加齿轮齿表面的残余应力。此外，电磁共振疲劳测试仪用于分析齿轮齿面的弯曲疲劳强度。试验结果表明，喷丸处理的齿轮齿的弯曲疲劳强度高于未喷丸处理的齿轮的弯曲疲劳强度。获得的结论为齿轮的进一步实际工程应用奠定了基础。