超声磨削表面残余应力工艺实验与回归分析

发布时间：2018-06-06 04:12

本文选题：残余应力 + 超声振动磨削　；参考：《西南交通大学学报》2017年03期

【摘要】：为了探索超声磨削的工艺特性,研制了轴向超声磨削加工实验装置,对45钢进行实验研究,采用i XRD便携式高速残余应力分析仪测量磨削表面残余应力,从实验角度分析磨削工艺参数对残余应力的影响,建立了残余应力关于磨削深度、超声振幅和砂轮线速度的回归方程,并用该方程预测表面残余应力.研究结果表明:普通磨削和超声磨削均在试件表面产生残余压应力,且轴向方向的残余压应力显著大于磨削方向的残余压应力;磨削深度和超声振幅能够增大残余压应力,砂轮线速度的增加会降低残余压应力;预测值与实验值的最大相对误差不超过5%,验证了该模型能有效预测超声磨削加工表面残余应力.
[Abstract]:In order to explore the technological characteristics of ultrasonic grinding, an experimental device for axial ultrasonic grinding was developed. The experimental study of 45 steel was carried out. The residual stress of the grinding surface was measured by I XRD portable high speed residual stress analyzer. The effect of grinding process parameters on the residual stress was analyzed from the experimental point of view. The residual stress was established on the grinding depth, and the excess of the grinding depth was established. The regression equation of acoustic amplitude and grinding wheel velocity is used to predict the residual stress of the surface. The results show that both ordinary grinding and ultrasonic grinding produce residual compressive stress on the surface of the specimen, and the residual compressive stress in the axial direction is significantly greater than the residual compressive stress in the grinding direction, and the grinding depth and ultrasonic amplitude can increase the residual stress stress. The increase of the velocity of the grinding wheel will reduce the residual compressive stress, and the maximum relative error between the predicted value and the experimental value is not more than 5%. It is proved that the model can effectively predict the residual stress in the surface of ultrasonic grinding.
【作者单位】：中南大学高性能复杂制造国家重点实验室;中航工业南方航空工业有限公司;
【基金】：国家自然科学基金资助项目(51535012)
【分类号】：TG580.6

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