过盈量对轮轴压装过程的影响
Influence of interference on Process of Wheel-shaft Pressing

为提高轮轴压装过程中轮对的检查验收合格率，利用ABAQUS软件依据试验数据以及不同参考标准建立轮轴压装过程的动态有限元模型，对压装力以及轮座与轮毂孔配合面之间的等效应力进行分析。结果表明：在轮轴压装过程中，轮座与轮毂孔配合面之间的过盈量对压装结果影响较大，建议按照我国的铁道标准规定的过盈量取值范围进行加工，可提高轮轴压装的合格率。综合分析压装过程中轮轴间等效应力的变化以及压装结束后等效应力的分布状态，总结出应力集中的位置，为轮轴探伤提供一定的参考依据。
In order to improve the qualification rate of wheelset in the pressing process of wheel-shaft, the dynamic finite element models for wheel-shaft pressing process based on the experimental data and different reference standards have been established via ABAQUS software. And the pressing force and equivalent stress on the contact surface between the wheel seat and the wheel hub bore have been analyzed. The results are as follows. In the pressing process of wheel-shaft, the interference between the wheel seat and the hub bore has a great influence on the fitting result. It is proposed that pressing is proceeded according to the range of interference in china railway standard, and the qualification pressing ratecould be improved. The changing rules of the equivalent stress between the wheel and the shaft in the pressing process and the equivalent stress distribution after the process have been comprehensively analyzed. And the location of the stress concentration is summed up, which provides a reference for the flaw detection of wheel and shaft