Experimental Evaluation of the Workpiece Surface Quality of MoS2/CNT Nanofluid for Minimal Quantity Lubrication in Grinding

doi:10.3901/JME.2018.01.161

Abstract

Abstract: An experimental research on effect of MoS₂/CNTs hybrid nanofluid minimum quantity lubrication (MQL) grinding on workpiece surface quality of difficult-to-cut materials is carried out based on research status of nanofluids MQL. Surface roughness R_a, autocorrelation analysis of contour curve and surface topography (SEM) are studied in research. Experimental results show that nanofluid MQL avoid burn phenomenon due to nanoparticles can significantly improve heat transfer of nanofluids. The MoS₂/CNT hybrid nanoparticles achieve lower surface roughness R_a value and grinding peak temperature than single nanoparticles because of "physical synergistic effect". Influenced by viscosity of nanofluids, surface roughness (R_a) increases gradually with the increase of mass fraction of nanofluid. Friction coefficient and grinding peak temperature, influenced by "agglomeration", decreases firstly and then increases with the increase of mass fraction of nanofluid, reaching the valley at 6%. According to the autocorrelation analysis, nanoparticle improves the grinding accuracy due to the "lubrication effect" and "micro-machining". It conclude that 6%, "agglomeration" phenomenon occurred concentration, MoS₂/CNTs is the optimum concentration for nanofluid MQL in the experiment.

Key words: autocorrelation analysis, grinding, minimum quantity lubrication (MQL), MoS₂/CNTs nanofluids, workpiece surface quality

CLC Number:

TG580

ZHANG Yanbin, LI Changhe, JIA Dongzhou, LI Benkai, WANG Yaogang, YANG Min, HOU Yali, ZHANG Naiqing, WU Qidong. Experimental Evaluation of the Workpiece Surface Quality of MoS₂/CNT Nanofluid for Minimal Quantity Lubrication in Grinding[J]. Journal of Mechanical Engineering, 2018, 54(1): 161-170.

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Experimental Evaluation of the Workpiece Surface Quality of MoS₂/CNT Nanofluid for Minimal Quantity Lubrication in Grinding

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