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| Penetration and deposition characteristics and machining performance of magnetic field assisted nanofluid spray lubrication |
Tao LV1,2( ),Aibing YU2,Xuefeng XU3,*(),Minhai MA1,Conglin ZHAO4 |
1. China Light Industry Plastic Mold Engineering Technology Research Center, Ningbo Polytechnic, Ningbo 315800, China
2. School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
3. Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China
4. School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
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Abstract A magnetic field assisted nanofluid spray lubrication technology was proposed in order to improve the high oil mist mass concentration environment formed by oil-based spray lubrication during machining. The innovation method can significantly reduce the oil mist mass concentration in the working environment. A magnetic field assisted spray device was constructed, and a water-based Fe3O4 nanofluid was prepared as cutting fluid. The penetration and deposition characteristics of nanofluid droplets under different magnetic induction intensities were analyzed. The oil mist mass concentration and machining performance of magnetized nanofluid mist during milling with 430 stainless steel were comparatively analyzed. Results show that the penetrability of nanofluid droplet was improved and the deposition amount was increased under the influence of magnetic field. The oil mist mass concentration, tool wear, cutting force, and roughness of nanofluid spray lubrication with 60 mT magnetic induction intensity were 66.3%, 22.7%, 14.6%, and 23.4% lower than those of vegetable oil spray lubrication, respectively. The nanofluid mist is easy to deposit under the influence of magnetic field and penetrate into the capillary micro crevice in the tool-chip contact interface to play a lubricating and cooling role and inhibit the dispersion of the oil mist.
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Received: 30 October 2023
Published: 23 October 2024
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| Fund: 国家自然科学基金资助项目（52275468）；国家重点研发计划资助项目（2020YFB2010600）；宁波职业技术学院2022年度国家级科研项目培育课题（NZ22GJ003）. |
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Corresponding Authors:
Xuefeng XU
E-mail: tomtaolv@163.com;xuxuefeng@zjut.edu.cn
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磁场辅助纳米流体气雾渗透沉积特性及其加工性能
为了改善机加工过程中油基气雾润滑形成的高油雾质量浓度环境，提出磁场辅助纳米流体气雾润滑技术. 该技术可以大幅降低作业环境的油雾质量浓度. 搭建磁场辅助气雾装置，配制水基Fe3O4纳米流体切削液. 研究磁场影响下纳米流体气雾的渗透和沉积特性. 对比考察磁化气雾在铣削430不锈钢过程中的油雾质量浓度和加工性能. 结果表明，磁场影响下的纳米流体气雾渗透能力提升，沉积量增多. 当磁感应强度为60 mT时，纳米流体气雾润滑下的油雾质量浓度、刀具磨损量、切削力和粗糙度分别比植物油气雾润滑低66.3%、22.7%、14.6%和23.4%. 磁场影响下的纳米流体易沉积且渗透进刀-屑接触界面的毛细微缝中发挥润滑冷却作用，抑制油雾的弥散.
关键词：
磁场辅助,
气雾润滑,
渗透,
油雾质量浓度,
刀具磨损,
切削力,
粗糙度
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