• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (5): 198-211.doi: 10.3901/JME.2022.05.198

• 数字化设计与制造 • 上一篇    下一篇

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钛合金生物润滑剂电牵引磨削性能及表面形貌评价

贾东洲1,2, 李长河1, 张彦彬1, 杨敏1, 曹华军3, 刘波4, 周宗明5   

  1. 1. 青岛理工大学机械与汽车工程学院 青岛 266520;
    2. 辽宁工业大学机械工程与自动化学院 锦州 121001;
    3. 重庆大学机械工程学院, 重庆 400044;
    4. 四川明日宇航工业有限责任公司 什邡 618400;
    5. 汉能(青岛)润滑科技有限公司 青岛 266200
  • 收稿日期:2021-06-29 修回日期:2021-08-31 出版日期:2022-03-05 发布日期:2022-04-28
  • 通讯作者: 李长河(通信作者),男,1966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理论与技术。E-mail:sy_lichanghe@163.com E-mail:sy_lichanghe@163.com
  • 作者简介:贾东洲,男,1987年出生,博士研究生。主要研究方向为切削磨削加工理论与技术。E-mail:jia_dongzhou@163.com
  • 基金资助:
    国家自然科学基金(51975305,51905289,52105457);国家重点研发计划(2020YFB2010500);山东省自然科学基金重点(ZR2020KE027)资助项目。

Grinding Performance and Surface Morphology Evaluation of Titanium Alloy Using Electric Traction Bio Micro Lubricant

JIA Dong-zhou1,2, LI Zhang-he1, ZHANG Yan-bin1, YANG Min1, CAO Hua-jun3, LIU Bo4, ZHOU Zong-ming5   

  1. 1. School of Mechanical and Automotive Engineering, Qingdao University of Technological, Qingdao 266520;
    2. College of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou 121001;
    3. School of Mechanical Engineering, Chongqing University, Chongqing 400044;
    4. Sichuan Future Aerospace Industry LLC., Shifang 618400;
    5. Hanergy (Qingdao) Lubrication Technology Co., Ltd., Qingdao 266200
  • Received:2021-06-29 Revised:2021-08-31 Online:2022-03-05 Published:2022-04-28

摘要: 微量润滑(Minimum quantity lubrication,MQL)雾化液滴易发生飞移飘散,不仅对环境和工人健康产生威胁,同时降低了润滑剂的有效利用率,是目前MQL磨削的瓶颈问题。创新提出了气流场与静电场耦合作用下,雾化液滴平均粒径及粒径分布精准可控的静电雾化微量润滑(Electrostatic MQL,EMQL)磨削新工艺。为了探究电压对于液滴迁移活性的影响规律,对比分析了MQL与不同电压EMQL工况下润滑剂雾化及荷电特性,结果表明相较于MQL工艺,电压为40kV时雾化液滴体积平均粒径减小了29.56%、粒径分布跨度R.S值降低了47.85%,40 kV时液滴荷质比为0.302 mC/kg。为了揭示EMQL钛合金Ti-6Al-4V磨削润滑机理,进行了干磨削、浇注式、MQL和EMQL四种润滑工况磨削试验,结果表明:相比于干磨削、浇注式及MQL工况,EMQL工况下获得了最小切向磨削力和法向磨削力分别为28.53N和77.18N,摩擦因数分别降低了29.39%、9.31%和13.95%,比磨削能分别下降了51.34%、18.40%和30.11%。利用激光共聚焦显微镜观察工件表面形貌,结果显示:EMQL工况下,工件表面始终未出现粘附重铸层,在电压为35 kV时获得最优工件表面,其面粗糙度Sa为0.84μm,且粘附点数量和尺寸均得到明显减小。

关键词: 磨削, 微量润滑, 钛合金, 静电雾化, 迁移活性

Abstract: Minimum quantity lubrication(MQL) atomized droplets are easy to fly and disperse, which is the bottleneck problem of MQL grinding. This not only threatens the environment and workers' health, but also reduces the effective utilization rate of lubricant.A new grinding process of electrostatic minimum quantity lubrication(EMQL) is innovatively proposed, which can accurately control the average particle size and particle size distribution of atomized droplets under the coupling effect of airflow field and electrostatic field. To explore the effect of voltage on droplet migration activity, the atomization and charging characteristics of lubricant under MQL and EMQL were compared and analyzed. Compared with MQL, the average droplet size and the R.S. value of droplet size distribution span is decreased by 29.56% and 47.85% respectively when the voltage is 40 kV. And the droplet migration activity is also improved. The charge mass ratio of the droplet is 0.302 mC/kg at 40 kV. To reveal the EMQL grinding mechanism of titanium alloy Ti-6Al-4V, grinding experiments of different lubrication conditions(dry, flood, MQL and EMQL) were carried out. The results showed that the minimum tangential grinding force and normal grinding force(28.53 N and 77.18 N) were obtained under EMQL condition. Compared with dry, flood and MQL conditions, the friction coefficient is reduced by 29.39%, 9.31% and 13.95% respectively, and the specific grinding energy was reduced by 51.34%, 18.40% and 30.11% respectively. The surface morphology of the workpiece is found no adhesion recast layer observed by laser confocal microscope under EMQL condition. The optimal workpiece surface is obtained at 35 k V, and the surface roughness Sa is 0.84 μm. The number and size of adhesion points were significantly reduced.

Key words: grinding, MQL, titanium alloy, electrostatic atomization, migration activity

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