强化研磨喷射压力对轴承表面残余应力的影响
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摘要
为研究强化研磨加工与轴承工件强度之间的关系,首先从理论上分析表面残余压应力对轴承工件裂纹扩展速率的影响,并通过实验验证强化研磨对提高轴承表面残余应力具有显著效果。结果表明,在保证工件粗糙度的情况下,要提高轴承表面残余应力,在强化研磨加工中喷射压力最好控制在0.4-0.6MPa。
In order to discuss the relationship between strengthening and polishing process and the surface residual stress of bearings,this paper first analyzes the effect upon the bearings crack growth rate on the surface residual compressive stress theoretically. Through the experimental verification,strengthening and polishing process to improve the surface residual stress has a significant effect. The results show that,under the conditions that can ensure the bearingsroughness,in order to improve the surface residual stress,the injection pressure is preferably controlled at 0. 4-0. 6 MPa in the strengthening and polishing process.
In order to discuss the relationship between strengthening and polishing process and the surface residual stress of bearings,this paper first analyzes the effect upon the bearings crack growth rate on the surface residual compressive stress theoretically. Through the experimental verification,strengthening and polishing process to improve the surface residual stress has a significant effect. The results show that,under the conditions that can ensure the bearingsroughness,in order to improve the surface residual stress,the injection pressure is preferably controlled at 0. 4-0. 6 MPa in the strengthening and polishing process.
引文
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[5]马昌训,吴运新,郭俊康.X射线衍射法测量铝合金残余应力及误差分析[J].热加工工艺,2010,24:5-8.
[6]杨帆,费维栋,蒋建清.X射线衍射技术在薄膜残余应力测量中的应用[J].功能材料,2007(11):1745-1749.
[2]栾伟玲,涂善东.喷丸表面改性技术的研究进展[J].中国机械工程,2005,15:1405-1409.
[3]陈志斌,刘晓初,李文雄,等.轴承套圈强化研磨表面残余应力试验研究[J].机电工程技术,2013(12):76-78.
[4]倪向贵,李新亮,王秀喜.疲劳裂纹扩展规律Paris公式的一般修正及应用[J].压力容器,2006(12):8-15,19.
[5]马昌训,吴运新,郭俊康.X射线衍射法测量铝合金残余应力及误差分析[J].热加工工艺,2010,24:5-8.
[6]杨帆,费维栋,蒋建清.X射线衍射技术在薄膜残余应力测量中的应用[J].功能材料,2007(11):1745-1749.