一种新型轮毂轴承外圈结构的淬火有限元分析

FEM Analysis of a New Type Hub Bearing Rings During Quenching

在建立了轮毂轴承外圈淬火的温度-组织-应力/应变多场耦合模型的基础上,研究了轮毂轴承外圈淬火后的等效应力以及变形情况,提出了一种新型轮毂轴承外圈结构。研究结果表明:在淬火过程中由于相变会产生很大的组织应力,组织间相互挤压导致轮毂轴承外圈外表面中部等效应力较大,使变形不均匀。因此,在轮毂轴承外圈外表面的中部开一个弧形槽,减小了等效应力,使径向变形趋于均匀,为机加工余量的确定和后续磨削提供一定的理论基础。

Based on establishing a temperature- organization- stress / strain muti- field coupling model of the hub bearing outer ring,the equivalent stress and deformation of outer ring after quenching are investigated and a new kind of structure of hub bearing outer ring is put forward. The research result shows that the large transformation stress is caused by phase change during quenching process,and the equivalent stress in the central section of the hub bearing outer ring is large because of extrusion between tissue,which leads to nonuniform deformation. An arc- shaped groove on the middle of the hub bearing outer ring surface is created to decrease the equivalent stress and balance the radial deformation. The certain theoretical basis is provided for the determination of machining allowance and subsequent grinding