Performance evaluation of aluminium 6063 drilling under the influence of nanofluid minimum quantity lubrication
Performance evaluation of aluminium 6063 drilling under the influence of nanofluid minimum quantity lubrication
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DOI：
10.1016/j.jclepro.2016.07.139
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发表时间：
2016-11-20
影响因子：
11.1
通讯作者：
Singh, Tarjeet
中科院分区：
文献类型：
--
作者：
Chatha, Sukhpal Singh;Pal, Amrit;Singh, Tarjeet
出于环境和经济原因，工业界和学术界最近的研究一直在寻找减少加工液使用的方法。新的切割技术将被研究，以实现这一目标。最小润滑量（MQL）是一种最新的技术，用于机械加工，以获得安全，环境和经济效益，减少金属切削中冷却剂润滑液的使用。这项工作的目的是比较不同的润滑条件（干，淹没，纯MQL和纳米流体MQL）的切削力（推力和扭矩），刀具磨损和表面粗糙度在铝6063合金使用高速钢钻头钻削的性能。在两种MQL方法（纯MQL和具有纳米颗粒的MQL）中，供油速率固定在200 ml/h，空气压力固定在70 Psi。纳米颗粒（Al 2 O3）的尺寸为20 nm的被认为是与基础油（大豆油）中的体积浓度为1.5%的纳米流体。实验结果表明，与其他冷却剂润滑条件相比，纳米流体MQL（NFMQL）显着增加了钻孔数量，降低了钻孔扭矩和推力。NFMQL的上级结果可能归因于NFMQL由于其纳米颗粒的滚动效应和高级上级冷却性能而在工具/切屑和工具/工件界面处产生低摩擦力的原因。此外，纳米流体MQL可有效消除切屑和毛刺，从而提高孔的表面质量，并通过获得最低的刀具磨损来延长刀具寿命。(C)2016爱思唯尔有限公司版权所有
For environmental and economic reasons, recent research in industry and academia has sought ways to reduce the use of machining fluids. New cutting techniques are to be investigated to achieve this objective. Minimal quantity of lubrication (MQL) is a recent technique introduced in machining to obtain safe, environmental and economic benefits, reducing the use of coolant lubricant fluids in metal cutting. The objective of this work is to compare the performance of different lubrication conditions (dry, flooded, pure MQL and nanofluid MQL) with respect to the cutting forces (thrust force and torque), tool wear and surface roughness in the drilling of aluminium 6063 alloy by using HSS drill tools. In both MQL methods (pure MQL and MQL with nano-particles) oil supply rate is fixed at 200 ml/h and air pressure is fixed at 70 Psi. The nano-particles (Al2O3) of 20 nm in size are considered for the nanofluid with volumetric concentration of 1.5% in base oil (soya bean oil). The experimental results show that the nanofluid MQL (NFMQL) significantly increases the number of drilled holes and reduces the drilling torques and thrust forces as compare to other coolant-lubrication conditions. Superior results of NFMQL may be attributed to the reason that NFMQL produces low friction force at the tool/chip and tooliworkpiece interfaces due to its rolling effect of nano-particles and superior cooling performance. In addition, the nanofluid MQL effectively eliminates chips and burrs to enhance the surface quality of holes and also increases the tool life by obtained lowest tool wear. (C) 2016 Elsevier Ltd. All rights reserved.