基于静电微量润滑技术的磨削加工性能试验研究  

Experimental Investigation on Grinding Performance Based on EMQL Technology

作　　者：林建斌 吕涛[1] 黄水泉[1] 胡晓冬[1] 许雪峰[1] LIN Jianbin;LYU Tao;HUANG Shuiquan;HU Xiaodong;XU Xuefeng(Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,Ministry of Education&Zhejiang Province,Zhejiang University of Technology,Hangzhou,310014)

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,杭州310014

出　　处：《中国机械工程》2018年第23期2783-2791,2798,共10页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51375454);浙江省公益技术应用研究资助项目(2016C31G2020038)

摘　　要：在构建静电微量润滑(EMQL)磨削加工系统的基础上,分析了不同荷电电压下润滑液液滴的荷质比和润湿渗透性能,研究了正负荷电电压下静电微量润滑技术的磨削加工特性。通过分析工件表层的显微硬度和显微组织,揭示了静电微量润滑技术的磨削加工作用机理。结果表明:荷电液滴的表面张力与润湿角减小,液滴的渗透性和润湿性提高。与传统微量润滑(MQL)相比,荷电液滴更易在砂轮-工件接触面渗透铺展,提升了润滑与换热能力,在正荷电静电微量润滑条件下,工件表层显微组织中的铁素体相对含量增加,工件表层显微硬度降低,磨削加工性能更好。As an EMQL grinding system was developed,the effects of charging voltages on charge to mass ratio of lubricant droplets were investigated,and the wettability and permeability of droplets were analyzed.The grinding characteristics of EMQL were systematically studied at positive and negative charging voltages.Through analyzing the microhardness and microstructure of ground workpiece surfaces,the grinding mechanism of EMQL was revealed.The results show that as lubricant is charged,the surface tension and wetting angle of lubricant droplets reduce,and increase the permeability and wettability.Compared with the conventional MQL,the charged lubricant droplets are easily to enter and cover the wheel-workpiece interfaces,which improve the lubrication and the capacity of heat transfer on the grinding areas.Under the conditions of EMQL,the positive voltages increase the relative contents of ferrites on the ground surfaces,followed by reducing the microhardness of workpiece surfaces,which produce the better grinding performance.

关 键 词：微量润滑 静电微量润滑 水基润滑液 显微硬度 显微组织 磨削性能 

分 类 号：TH582[机械工程]