低温微量润滑温度对表面粗糙度的影响实验
2018-12-20
作者：刘大维，覃孟扬，周莉，徐兰英
单位：广东技术师范学院
摘要：为了解低温微量润滑（CMQL）温度对工件表面粗糙度的影响，设计45钢的车削试验，在三组不同切削参数下进行干切削、浇注冷却、微量润滑（MQL）和不同温度的CMQL车削，然后测量试样表面粗糙度和用扫描电镜(SEM)观察表面形貌，探明不同润滑条件的粗糙度差异。实验结果表明，同样切削参数下，CMQL的粗糙度小于MQL；当温度低于某个值，CMQL的粗糙度小于传统浇注冷却；CMQL温度越低，获得粗糙度越小，但当低于某个温度，CMQL温度对粗糙度影响可以忽略不计；切削越剧烈，CMQL温度对粗糙度的影响越明显；CMQL对表面粗糙度的影响机理是强渗透性和强冷却能力。
关键词：微量润滑；粗糙度；加工机理；加工表面质量
中图分类号：TG501.1；TH161文献标志码：A
Effect of Cold Minimal Quantity Lubrication Temperature on Finish
Liu Dawei，Qin Mengyang，Zhou Li，Xu Lanying
Abstract:In order to understand the effect of CMQL temperature on surface finish，there is a turning test of 45 steel.Turning were carried by drycutting，casting lubrication，MQL or CMQL of different temperatures under three different parameters，and then sample surface finish are measured and their surface morphology was observed by scanning electron microscopy(SEM).The difference of finish is found.The results show that CMQL finish is less than MQL by the same cutting parameters；when the temperature is lower than a certain value，CMQL finish is less than the traditional casting lubrication；CMQL lower temperature，CMQL will get a smaller finish；when CMQL temperature is smaller than a certain temperature，its effect on the finish can be ignored；CMQL temperature has the more obvious impact on finish when cutting more intense.The mechanism of CMQL on surface finish is strong penetration and strong cooling capacity.
Keywords:MQL; finish; processing mechanism; machined surface quality