Minimal Quantity Lubrication(MQL)is a green and sustainable machining technology,and Nanofluid Minimal Quantity Lubrication(NMQL)is a synergistic technology for MQL.Combined with the current research status of NMQL at home and abroad,the effect of Al2O3 nanofluid micro-lubrication on the drilling performance of TC4 titanium alloy is studied,and the cutting temperature,machined surface quality and tool wear are taken as the parameters to characterize the drilling and machining performance,and the results of the experiment show that:the Al2O3 nanofluid micro-lubrication can reduce the temperature of the cutting zone effectively due to its high thermal conductivity;the effect of rolling,polishing and repairing can significantly improve the quality of drilled holes,reduce tool wear and extend tool life.As the concentration of alumina nanoparticles increases,the effect is more obvious.Among them,3％concentration of Al2O3 nanofluid micro-lubrication of drilling processing performance is the best,compared with the dry drilling of the highest temperature of cutting reduced by 50.7％;surface roughness Ra、Rq、Rz average values were reduced by 62.9％,55.7％and 32.4％respectively;the width of the wear zone of the back face of the VB value was reduced by 41.5％;the tool surface of the crescent-shaped puddle wear,bonding wear and micro-chipping The phenomenon of crescent pit wear,bonded wear and micro-chipping on the tool surface was significantly improved.
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