纵-扭复合超声对滚齿面强化机理及表面特性研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (7) : 289-300.

论文

姜燕，赵波

作者信息 +

Mechanism of longitudinal-torsional ultrasonic rolling strengthening gear tooth surface and surface characteristics

JIANG Yan, ZHAO Bo

Author information +

文章历史 +

摘要

为了强化齿面，提高齿轮表面的使役性能，使用一种新的纵-扭复合强化加工方法对齿轮进行强化。首先，基于赫兹接触理论和齿轮啮合理论，建立了纵-扭超声滚压齿面等效应力的理论模型；其次采用有限元仿真技术对该加工方式进行了模拟；最后利用已经搭建好的试验平台进行了一系列的纵-扭超声对滚齿面强化试验。通过对比仿真与理论结果对比，施加纵-扭超声后可以有效的提高接触应力，本文中有无超声振动接触应力提高约1.7~2倍，致使齿轮表面材料发生屈服进而完成。试验结果进一步表明纵-扭超声滚强化压改善了齿面的表面特性。当施加纵-扭复合超声振动时，齿面残余应力随阻尼力矩增大而增加，沿齿廓方向残余应力呈现先增大后减小趋势，在节圆处残余应力值最大。齿面的显微硬度HV1.0数值沿齿廓呈现时变特性，超声滚压强化加工可以改善齿面表面形貌。与传统滚压相比，超声滚压强化后表面峰谷间距加宽，粗糙度降幅可达45%~55%。因此，纵-扭超声对滚强化加工可以实现齿面强化、改善齿面特性，提高残余压应力和显微硬度、降低表面粗糙度并提高齿面质量。

Abstract

This paper uses a longitudinal-torsional ultrasonic rolling method（LTUR）to strengthen the surfaces and improve properties of teeth flanks. Based on the Hertz contact mechanisam and Meshing theory, the model of equivalent stress from LTUR is first built. Furthermore, the process of the method is simulated and analyzed using FEM ways. Finally, the corresponding experiment device is constructed and some experiments are performed. After comparing the simulating and analytical results, applying longitudinal torsional ultrasound can effectively improve the contact stress. In this paper, the contact stress with or without ultrasonic vibration is increased by about 1.7 ~ 2 times, which causes the material to yield and then complete the strengthening. From experiments, it is shown that LTUR can improve surface properties of teeth flanks to some extent. The residual stress on the tooth surface increases with the increase of damping torque. The residual stress along the tooth profile first increases and then decreases, and the residual stress value is the largest at the pitch circle. The microhardness presents time-varying characteristics along the tooth profile. Simultaneously, the surface topography is also changed, peak-valley space is widen and the roughness is declined to about 45%~55% of its original values. Therefore, the method in this paper can strength the teeth flank, improve surface property, raise residual stresses and microhardness as well as decrease the surface roughness. In summary, this method can improve the surface quality.

导出引用

姜燕，赵波. 纵-扭复合超声对滚齿面强化机理及表面特性研究[J]. 振动与冲击, 2023, 42(7): 289-300

JIANG Yan, ZHAO Bo. Mechanism of longitudinal-torsional ultrasonic rolling strengthening gear tooth surface and surface characteristics[J]. Journal of Vibration and Shock, 2023, 42(7): 289-300

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