Capillary penetration mechanism and oil mist concentration of Al2O3 nanoparticle fluids in electrostatic minimum quantity lubrication (EMQL) milling

Xu, Xuefeng; Lv, Tao; Liu, Zhiqiang; Zhao, Yangyang; Wang, Minghuan; Hu, Xiaodong

doi:10.1007/s00170-019-04023-3

Cited by 34 publications

(6 citation statements)

References 38 publications

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“…As shown in figure 20(c), compared with the findings for MQL machining, the temperature during EMQL machining can be reduced by approximately 10% for AISI-304 turning [243], by approximately 27% for milling [246], and by 21% during grinding of the mold steel Cr12 [238]. Compared with the machining temperature dry cutting, the machining temperature of MQL was lower owing to the small amount of cutting fluid required to enter the cutting zone, thus improving the heat dissipation in the cutting zone, and the presence of airflow increased the convective heat transfer.…”

Section: Film Formation and Cooling Enhancement Mechanismmentioning

confidence: 74%

“…An 18% reduction of CoF by using the contact-charge ESL was obtained with respect to conventional MQL in frictional wear experiments that used a four-ball machine [225]. Compared with the CoF values of conventional MQL, those obtained by EMQL in the milling of AISI-304 and the grinding of Cr12, Ti-6Al-4V were reduced by 18% [239], 38.2% [246], and 14% [227]. The CoF obtained in the grinding of titanium alloys with soybean biolubricant via EMQL was lower than that of flood, which is a surprising result (figure 20(b)).…”

Section: Film Formation and Cooling Enhancement Mechanismmentioning

confidence: 88%

“…In the milling of the stainless steel AISI 304, the machining performance obtained at −4 kV was better than that obtained at −2 kV [246]. However, when the voltage was in the range of −4 to −10 kV, the cutting force, tool wear, cutting temperature, and surface roughness obtained from the machining of EMQL deteriorated as the voltage increased, and EMQL achieved the best machining performance at −4 kV.…”

Section: Machining Performance Assessmentmentioning

confidence: 88%

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Electrostatic atomization minimum quantity lubrication machining: from mechanism to application

Zhang

et al. 2022

Int. J. Extrem. Manuf.

170

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Metal cutting fluids in flood condition does not meet the urgent needs of emission cutting and carbon reduction, minimum quantity lubrication (MQL) is an effective alternative to flood lubrication. Nevertheless, the micro-droplets produced by pneumatic atomization MQL have poor infiltration and wetting properties, which cannot fully exert the film-forming and heat transfer performance of lubricant. The unique empowering mechanism of electrostatic atomization can not only solve the above technical bottleneck, but also realize parametric control of the droplets. Previously, the improvement of tool wear and surface integrity of electrostatic atomization have been preliminarily verified by experimental studies. However, the application principle of electrostatic atomization in the manufacturing process is ambiguous, which limits its further development and industrial application. Especially the in-depth understanding of the action mechanism of the high temperature and high pressure contact interface is difficult and meaningful. More importantly, electrostatic atomization-assisted MQL machining has not been systematically reviewed. In this review, firstly, an analysis of the critical devices, common media (nano-biolubricants) and empowering mechanisms is presented. Subsequently, the excellent machining performance of nano-biolubricants was quantitatively evaluated by comparing with flood, revealing its advanced lubrication and heat transfer mechanism. Furtherly, the excellent machining performance was assessed based on the enhanced penetration, infiltration and film formation properties of electrostatic atomization, with a 42.4% reduction in tool wear and a 47% improvement in machined surface Ra compared to pneumatic atomization. Finally, the limitations of current electrostatic atomization and green lubrication technologies are analyzed and the future trends (e.g. new processes and multi-process coupling) are foreseen. The aim of this paper is to provide a comprehensive review and critical assessment of the existing understanding, which can be used by scientists to gain insight into the mechanism of action, the theoretical basis, machining performance and development direction of new electrostatic atomization processes.

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Section: Film Formation and Cooling Enhancement Mechanismmentioning

confidence: 74%

Section: Film Formation and Cooling Enhancement Mechanismmentioning

confidence: 88%

Section: Machining Performance Assessmentmentioning

confidence: 88%

See 1 more Smart Citation

Electrostatic atomization minimum quantity lubrication machining: from mechanism to application

Zhang

et al. 2022

Int. J. Extrem. Manuf.

170

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“…Prior to testing, collection sheets are cleaned using acetone and ultrasound treatment to remove surface contaminants. All experiments are conducted in triplicate, and mean values are reported [27]. Minimum Quantity Lubrication (MQL) systems, compressed air and an atomizer are utilized to mix oil, generating aerosols that form a fog between the tool and workspace interface.…”

Section: Figure 5 Minimum Quantity Lubricationmentioning

confidence: 99%

Performance of Liquid Lubricants Using Nano-Additvies in Minimum Quantity Lubrication in Machining Process

2024

jmc

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The performance of liquid lubricants employing nano-additives in minimum quantity lubrication (MQL) during the machining process has garnered significant attention in recent years. Nano-additives, due to their unique properties and characteristics, have demonstrated potential in enhancing the lubricating properties of conventional fluids used in MQL. These additives, typically ranging from nanoparticles to nanofluids, offer improved lubricity, reduced friction, and enhanced heat dissipation, thereby leading to better machining performance, extended tool life, and improved surface quality of machined components. By reducing the amount of lubricant used while maintaining or even enhancing performance, MQL with nano-additives not only addresses environmental concerns associated with excessive fluid usage but also contributes to cost savings and increased productivity in machining operations. However, challenges such as dispersion stability, compatibility with base fluids, and cost-effectiveness need to be carefully addressed to fully realize the potential benefits of incorporating nano-additives into MQL lubricants for machining applications. Ongoing research and development efforts in this field aim to further optimize the formulation and application of these advanced lubricants to meet the ever-evolving demands of modern manufacturing processes.

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“…Various research studies have demonstrated the effect of nanoparticles mixed in the base oils with an aim to enhance the machining characteristics [8,[34][35][36][37][38]. However, the role of molybdenum disulfide (MoS 2 ) nanoparticles in the vegetable oil has not been explored much, principally in the drilling process.…”

Section: Nanofluid Mql (Nfmql)mentioning

confidence: 99%

Tribological characteristics and drilling performance of nano-MoS2-enhanced vegetable oil-based cutting fluid using eco-friendly MQL technique in drilling of AISI 321 stainless steel

Pal

Chatha

Sidhu

2021

J Braz. Soc. Mech. Sci. Eng.

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The implementation of sustainable manufacturing techniques to make machining operations more eco-friendly is a demanding issue that has gained attention from academic and industrial sectors. In some machining operations, a large quantity of machining fluids is wasted to make machining easier, especially during the machining of difficult-to-machine materials such as stainless steel. In such circumstances, many researchers are investigating eco-friendly techniques. Therefore, in this study, effects of minimum quantity lubrication (MQL) with MoS 2 -enhanced vegetable-oil-based cutting fluid on the drilling characteristics of AISI 321 stainless steel are investigated. The main aim of this study is to analyse the machining performance of various coolant-lubricant strategies, namely dry, flood, pure MQL, and three nanofluid MQL (NFMQL) with regard to thrust force and torque, surface roughness, friction coefficient, chip morphology and tool wear mechanism in drilling of stainless steel (AISI 321). Research findings indicated that NFMQL drilling conditions have given excellent drilling performance by improving drilling characteristics than pure MQL, dry and flood drilling. Among the NFMQL drilling conditions, 1.5 wt.% nano-MoS 2 in sunflower oil-based MQL condition provided better cooling-lubrication effect and improved the drilling characteristics followed by 1.0 wt.% and 0.5 wt.% nano-MoS 2 in sunflower oil-based MQL conditions. The 1.5 wt.% nano-MoS 2 in sunflower oil-based MQL drilling had resulted in 43.2%, 68.9%, 56.8% and 41.6% reduced values of thrust force, torque, surface roughness and COF, respectively, at the 30th hole in comparison with flood drilling. Moreover, noticeable improvement in the chip morphology and tool wear rate has been achieved while drilling under NFMQL environments. The better drilling performance of nanofluid MQL may be attributed to the fact that nanoparticles (MoS 2 ) in sunflower oil offer excellent cooling-lubrication features and provide strength to the oil film at the tool-workpiece interface. In addition, nano-MoS 2 particles have high surface activity and are easily adsorbed onto the contacting surfaces, thereby maintaining the lubrication effect.

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Capillary penetration mechanism and oil mist concentration of Al2O3 nanoparticle fluids in electrostatic minimum quantity lubrication (EMQL) milling

Cited by 34 publications

References 38 publications

Electrostatic atomization minimum quantity lubrication machining: from mechanism to application

Electrostatic atomization minimum quantity lubrication machining: from mechanism to application

Performance of Liquid Lubricants Using Nano-Additvies in Minimum Quantity Lubrication in Machining Process

Tribological characteristics and drilling performance of nano-MoS2-enhanced vegetable oil-based cutting fluid using eco-friendly MQL technique in drilling of AISI 321 stainless steel

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