静电微量润滑气雾特性及其切削加工性能研究

doi:10.3901/JME.2019.01.129

机械工程学报 ›› 2019, Vol. 55 ›› Issue (1): 129-138.doi: 10.3901/JME.2019.01.129

静电微量润滑气雾特性及其切削加工性能研究

吕涛, 黄水泉, 胡晓冬, 冯伯华, 许雪峰

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

收稿日期:2018-02-21 修回日期:2018-06-19 出版日期:2019-01-05 发布日期:2019-01-05
通讯作者: 许雪峰(通信作者),男,1964年出生,博士,教授,博士研究生导师。主要研究方向为切削、磨削加工工艺与装备,精密与特种加工技术。E-mail:xuxuefeng@zjut.edu.cn
作者简介:吕涛,男,1992年出生,博士研究生。主要研究方向为精密与特种加工技术。E-mail:tomlvtao@zjut.edu.cn
基金资助:
国家自然科学基金（51375454）和浙江省公益技术应用研究（2016C31038）资助项目。

Study on Aerosol Characteristics of Electrostatic Minimum Quantity Lubrication and Its Turning Performance

LÜ Tao, HUANG Shuiquan, HU Xiaodong, FENG Bohua, XU Xuefeng

Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014

Received:2018-02-21 Revised:2018-06-19 Online:2019-01-05 Published:2019-01-05

摘要/Abstract

摘要： 静电微量润滑（Electrostatic minimum quantity lubrication，EMQL）技术可显著提高荷电润滑液滴在加工区域的润湿、渗透和沉积性能，改善气雾的润滑冷却能力，降低切削环境油雾浓度。在构建静电微量润滑切削加工系统的基础上，分析了EMQL下荷电电压对润滑油液滴粒径、分布、润湿性和沉积性的影响。研究了EMQL的稳态换热能力，加工环境油雾浓度和切削性能。最后通过刀具磨损分析，揭示了EMQL切削加工时的作用机理。结果表明：荷电后润滑油液滴的粒径减小，分布更加均匀，润湿和沉积性提高。与传统MQL比较，EMQL下的切削温度降低了~14%，环境油雾浓度减小了~8%，刀具磨损下降了~37%，工件表面质量提高了~28%。EMQL加工时，润湿渗透性能改善的小粒径润滑油液滴易在刀具-工件接触面吸附，渗透和铺展，利于切削界面的润滑与换热，车削加工性能更好。

关键词: 沉积性, 静电微量润滑, 切削性能, 润湿性, 稳态换热, 油雾浓度

Abstract: The technology of electrostatic minimum quantity lubrication (EMQL) can not only enhance the depositing rate of lubricant droplets on the cutting area, but also increase their wetting and penetration to the contact interface, which thus improve droplet lubrication and cooling, as well as reduce concentration of the oil mist floating in the cutting environment. As a EMQL cutting system is developed, the effect of charging voltages on the diameter and distribution of lubricant droplets are investigated, and droplet wettability and deposition on the cutting interface are analyzed. The heat transfer capacity of EMQL in steady stage and its machining performance and oil-mist concentration after turning are comparatively studied. By use of tool wear analysis, the lubrication mechanism of EMQL in the cutting process is revealed. Results indicate that as lubricant charged, droplet diameter decrease and its distribution improve with an enhancement in the wettability and deposition. The cutting temperature, oil mist concentration, tool wear and workpiece surface roughness of EMQL are 14%, 8%, 37% and 28% lower than those of the traditional MQL, respectively. When EMQL is used, the improved wettability and reduced droplet diameter allow lubricant droplets to enter and cover the tool-workpiece interface more easily, which would help lubricate and cool the cutting interface, and thus achieve a better cutting performance.

Key words: cutting performance, deposition, electrostatic minimum quantity lubrication, oil mist concentration, steady-state heat transfer, wettability

中图分类号:

TG506

吕涛, 黄水泉, 胡晓冬, 冯伯华, 许雪峰. 静电微量润滑气雾特性及其切削加工性能研究[J]. 机械工程学报, 2019, 55(1): 129-138.

LÜ Tao, HUANG Shuiquan, HU Xiaodong, FENG Bohua, XU Xuefeng. Study on Aerosol Characteristics of Electrostatic Minimum Quantity Lubrication and Its Turning Performance[J]. Journal of Mechanical Engineering, 2019, 55(1): 129-138.

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静电微量润滑气雾特性及其切削加工性能研究

Study on Aerosol Characteristics of Electrostatic Minimum Quantity Lubrication and Its Turning Performance

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