微量润滑对切削加工残余应力的影响  

Influence of Minimal Quantity Lubrication on Machined Residual Stress

作　　者：贺爱东[1] 叶邦彦[1] 覃孟扬[2] 徐兰英[2] 梁立东[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广东技术师范学院机电学院,广东广州510665

出　　处：《湖南大学学报（自然科学版）》2015年第10期48-53,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51375101);广东省自然科学基金资助项目(S2013010011882)~~

摘　　要：为了了解微量润滑(MQL)对切削加工残余应力的影响,基于加工残余应力形成的热力耦合理论,对45钢、40Cr(淬硬)钢、40Cr(退火)钢和304不锈钢进行车削加工实验.研究不同材料在MQL、干切削、风冷切削和湿式切削条件下的残余应力、切削力和切削温度,然后分析残余应力分布差异的原因,得出MQL影响残余应力的规律及机理.实验结果表明,MQL有降低切削残余拉应力的作用;MQL对韧性和强度大的材料的加工残余应力影响较为明显,对难切削材料的影响要大于普通碳钢;对热效应的抑制是MQL影响残余应力的主要机理.Minimal quantity lubrication （MQL） is a green manufacturing technology. Based on thermal coupling theory on machined residual stress formation,there was a turning experiment to understand how MQL affected turning residual stresses,and the experiment materials were 45 steel, 40Cr steels （ harden- ing）,40Cr steels（annealing）and 304 stainless steel. In the experiment,the residual stresses, the cutting force and the cutting temperature were obtained in dry cutting, air cooling cutting, wet cutting and MQL. Then, the reasons were analyzed for the different distribution of the residual stress in all lubrication meth- ods,and laws and mechanism were obtained about how MQL affected residual stress. The experiment re- sults have shown that MQL helps to reduce residual tensile stress, MQL has obvious impact on high toughness and strength material, its impact on materials difficult to cut is greater than ordinary carbon steel, and the inhibition of thermal effects by MQL is the main mechanism which affects residual stress.

关 键 词：微量润滑 绿色加工 加工残余应力 加工质量 切削机理 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]