齿轮疲劳失效分析与工艺参数优化

齿轮传动在航空、机械、冶金、交通运输等领域中得到了广泛的应用，齿轮构件的疲劳失效会导致整个传动系统的失效。为了确保齿轮运行的平稳性和可靠性，对20CrMnTi渗碳齿轮的工艺参数进行优化。先对齿轮常见的齿根弯曲疲劳和齿面接触疲劳进行详细的失效机理分析，并基于此利用田口方法设计齿轮疲劳正交试验，然后根据设计参数进行齿轮疲劳试验，利用Minitab软件对试验数据进行分析。结果表明：影响齿轮疲劳性能的因素等级排序分别是渗碳层深度、心部硬度和表面粗糙度，且渗碳层深度的影响程度远大于后两者。

Fatigue Failure Analysis and Process Parameters Optimization of Gear

Gear transmission has been widely used in aviation, machine tools, metallurgy, transportation and other fields, and the fatigue failure of gears may result in failure of the entire transmission system. In order to ensure the smoothness and reliability of gear operation, the process parameters of the carburized 20CrMnTi gear have been optimized. Firstly, the detailed failure mechanism analysis of tooth root bending fatigue and tooth surface contact fatigue was carried out. Based on this, the orthogonal test of gear fatigue was designed by Taguchi method. Then the gear fatigue test was carried out according to the design parameters, and the experimental data are analyzed by Minitab software. The analysis results show that the ranking of the factors affecting the fatigue performance of gears is as follows: the depth of carburized layer, the hardness of the core and the surface roughness, and the influence degree of the depth of carburized layer is much greater than the latter two.