风电轴承套圈超声滚压强化残余应力形成规律分析  

Analysis of residual stress formation in ultrasonic rolling strengthening of wind power bearing rings

作　　者：徐红玉[1,2] 刘立波 崔凤奎 XU Hong-yu;LIU Li-bo;CUI Feng-kui(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China;Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province,Luoyang 471003,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]机械装备先进制造河南省协同创新中心,河南洛阳471003

出　　处：《塑性工程学报》2019年第5期125-132,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51475146)

摘　　要：为提高风电轴承套圈的疲劳强度,以风电轴承套圈为研究对象,选取超声滚压强化的静压力、振幅、工件转速和进给速度为主要工艺参数,进行风电轴承套圈的超声滚压强化试验研究。分析了不同工艺参数强化后的表面残余应力变化规律。结果表明:静压力对超声滚压强化表面残余应力值影响最大,较大的振幅对静压力作用效果有显著增强,工件转速与进给速度对残余应力值的影响具有一定交互关系,且一定范围内低转速高进给速度能预置更大的残余应力。所建立的响应面模型拟合度可达94. 84%,单因素最大相对误差6. 88%,可作为强化后风电轴承套圈表面残余应力控制的参考。To improve the fatigue strength of wind power bearing ring,the experiment of ultrasonic rolling in wind power bearing ring was carried out when the wind power bearing ring was taken as the research object,and the static pressure,amplitude,rotation speed and feed rate of ultrasonic rolling were selected as the main process parameters. The variation law of surface residual stress after strengthening with different process parameters was analyzed. The results show that static pressure has the greatest influence on the surface residual stress value after ultrasonic rolling strengthening. The effect of the larger amplitude on the static pressure is significantly enhanced,and there is a certain interaction between the effect of rotation speed and the feed speed on residual stress,and the low rotation speed and high feed speed can preset the higher residual stress within limits. The response surface model has a fitting degree of 94. 84% and the single factor maximum relative error is 6. 88%,which can provide references to the control of the residual stress of the wind turbine bearing ring surface after strengthening.

关 键 词：超声滚压 风电轴承套圈 残余应力 响应面法 疲劳强度 

分 类 号：TG113[金属学及工艺—物理冶金]