EA4T车轴车削工艺参数与表面残余应力的关系  

Study on the Relationship Between Turning Process Parameters and Surface Residual Stress for EA4T Axle

作　　者：李世涛[1] 于鑫[2] 孙杰[2] 

机构地区：[1]南车青岛四方机车车辆股份有限公司,青岛266111 [2]山东大学机械工程学院高效洁净机械制造教育部重点实验室,济南250061

出　　处：《机械设计与研究》2014年第6期90-94,共5页Machine Design And Research

基　　金：校企合作资助课题(SF/GY-邓字-2013-72)

摘　　要：车轴表面的应力状态是决定车轴的使用寿命和机车运行可靠性的关键因素之一,工艺参数对车轴表面应力状态产生重要影响。通过EA4T车轴车削正交试验与单因素试验,研究了工艺参数各因素如切削速度、进给速度、切削深度等对表面残余应力影响规律,揭示了工艺参数与表面残余应力分布关系之间的内在机制,提出了可以反映拉应力和压应力状态的残余应力综合预测模型。研究结果表明:残余应力预测模型对残余应力的产生起到较好的预测效果,与试验结果基本吻合。工艺参数中进给速度对表面残余应力作用最为显著,随进给速度增加,表面残余应力显著增大;其次为切削深度,在一定范围内,随切削深度增加表面残余应力逐渐减小;切削速度对残余应力影响呈波动变化。The surface stress status of axles is one of the key factors to determine the axle service life and further the locomotive running reliability. Process parameters have an important influence on the surface stress status of axles.Orthogonal experiment and single factor experiment were conducted to investigate the influences of process parameters such as cutting speed,feed rate and the depth of cut（ Do C） et al on surface residual stress. The internal mechanism of the relationship between process parameters and surface residual stress was revealed. A comprehensive prediction model which can reflect tensile and compressive stress status was proposed. It is shown that the residual stress prediction model has a good predictive effect,the predictive values agree well with the experimental data. It can also be obtained from the experiment that feed rate has significant effects on the surface residual stress,with the feed rate increases,the surface residual stress increases significantly. The Do C is the second important factor on residual stress. At a certain region,with the increase of the Do C,surface residual stress decreases. Cutting speed has a fluctuation influence on residual stress.

关 键 词：EA4T车轴 工艺参数 表面残余应力 预测模型 

分 类 号：TG506[金属学及工艺—金属切削加工及机床] TH161[机械工程—机械制造及自动化]