静电雾化微量润滑粒径分布特性与磨削表面质量评价  

Particle size distribution characteristics of electrostatic minimum quantity lubrication and grinding surface quality evaluation

作　　者：贾东洲 张乃庆[3] 刘波 周宗明 王绪平 张彦彬 毛聪 李长河[1] JIA Dongzhou;ZHANG Naiqing;LIU Bo;ZHOU Zongming;WANG Xuping;ZHANG Yanbin;MAO Cong;LI Changhe(School of Mechanical and Automotive Engineering, Qingdao University of Technology,Qingdao 266520, Shandong, China;School of College Engineering, Inner Mongolia University for Nationalities,Tongliao 028000, Inner Mongolia, China;Shanghai Jinzhao Energy Saving Technology Co . , Ltd . , Shanghai 200436, China;Sichuan Future Aerospace Industrial Co . , Ltd . , Shifang 618400, Sichuan, China;Hanergy (Qingdao) Lubrication Technology Co . , Ltd . , Qingdao 266200, Shandong, China;Research Institute of Intelligent Manufacturing Technology, MH Robot & Automation Co . , Ltd . ,Weifang 262200, Shandong, China;School of Automotive and Mechanical Engineering, Changsha University of Science and Technology,Changsha 410114, China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520 [2]内蒙古民族大学工学院,内蒙古通辽028000 [3]上海金兆节能科技有限公司,上海200436 [4]四川明日宇航工业有限责任公司,四川什邡618400 [5]汉能(青岛)润滑科技有限公司,山东青岛266200 [6]迈赫机器人自动化股份有限公司智能制造技术研究院,山东潍坊262200 [7]长沙理工大学汽车与机械工程学院,长沙410114

出　　处：《金刚石与磨料磨具工程》2021年第3期89-95,共7页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51975305,51905289);山东省重点研发计划(2019GGX104040,2019GSF108236);山东省重大创新工程项目(2019JZZY020111);山东省自然科学基金(ZR202011060080);内蒙古民族大学科学研究项目(NMDYB18018)。

摘　　要：针对微量润滑(minimum quantity lubrication,MQL)依靠的高压气体雾化微液滴粒径细化程度低、易飞逸飘散,有效利用率低以及对环境和人员健康产生危害的问题,提出气辅式静电微量润滑(electrostatic minimum quantity lubrication,EMQL)雾化新方法。开展多工况雾化性能对比试验,并对镍基合金磨削表面质量进行评价。结果表明:润滑剂荷电后雾化性能得到显著提高,在降低液滴平均体积粒径和分布跨度的同时,降低了悬浮可吸入小液滴(PM10)的质量浓度,且电压越高PM10质量浓度越低。当电压为35 kV时,润滑剂的雾化效果最理想,平均体积粒径和分布跨度分别降低了27.343%和41.456%,PM10质量浓度降低了5.065个百分点。磨削试验结果表明:相较气动雾化微量润滑,静电雾化微量润滑获得了更为理想的工件表面质量;当电压为35 kV时,工件表面粗糙度Ra和RSm分别为0.377μm和0.084 mm;干磨削工件表面质量极差,出现大量黏附和剥落现象,甚至有大面积的表面材料撕裂,因此干磨削不适用于高温镍基合金加工。A new method of gas assisted electrostatic atomization minimum quantity lubrication is proposed to solve the problems of low effective utilization rate and threat to the environment and human health due to the low degree of particle size refinement and easy flying of micro droplets atomized by high pressure gas.The contrast test of atomization performance under different working conditions is carried out,and the surface quality of nickel base alloy grinding is evaluated.The atomization test results show that the atomization performance of charged liquid is significantly improved,and the percentage concentration of suspended inhalable small droplets(PM10)is reduced while the average size and distribution span of droplets are reduced.And the higher the voltage is,the lower the mass concentration of PM10 is.When the voltage reaches 35 kV,the atomization effect is the optimal,the average volume particle size and distribution span are reduced by 27.343%and 41.456%respectively,and the mass concentration of PM10 is reduced by 5.065 percentage points.The results of grinding test show that the surface quality of the electrostatic minimum quantity lubrication is better than that of the minimum quantity lubrication by pneumatic atomization,and when the voltage is 35 kV,the surface roughness Ra and RSm are 0.377μm and 0.084 mm,the surface quality of dry grinding workpiece is very poor,there are a lot of adhesion and peeling phenomenon,even a large area of surface material tearing,so dry grinding is not suitable for high temperature nickel base alloy processing.

关 键 词：微量润滑 静电雾化 雾化特性 磨削加工 镍基高温合金 磨削表面质量 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]