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首页> 外文期刊>Journal of Manufacturing Processes >Performance evaluation of the minimum quantity lubrication with Al_2O_3-mixed vegetable-oil-based cutting fluid in drilling of AISI 321 stainless steel
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Performance evaluation of the minimum quantity lubrication with Al_2O_3-mixed vegetable-oil-based cutting fluid in drilling of AISI 321 stainless steel

机译：AISI 321不锈钢钻孔中AL_2O_3混合植物 - 油基切削液的最小数量润滑性能评价

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摘要

Due to increased awareness of ecological and health related problems, the researchers are actively searching for renewable and biodegradable cutting lubricants. Vegetable oils with solid lubricants are being explored as a potential source of environmentally helpful lubricants due to good combination of biodegradability, renewability and fabulous lubrication performance. Although sunflower oil poses good cooling capability, yet its application has not been explored extensively in drilling. Therefore, in this research work minimum quantity lubrication (MQL) technique with Al2O3-mixed vegetable-oil-based cutting fluid was implemented. The main objective of this experiment is to analyze the performance of various coolant-lubricant environments (dry, flood, pure MQL and nanofluid MQL) with regard to drilling forces, surface roughness, drill tip temperature and tool wear mechanism in the drilling of AISI 321 stainless steel by using HSS drill tools. In the MQL conditions, coolant supply rate and air pressure are fixed at 120 mL/hr and 6 bar respectively. In addition to explore the cooling capabilities of sunflower oil, nano-Al2O3 were added to the sunflower oil to prepare different concentration (0.5 wt.%, 1.0 wt.% and 1.5 wt.%) nanofluids. Results indicated that MQL drilling with Al2O3-mixed vegetable-oilbased cutting fluid achieved much better performance as compared to the dry, wet and pure MQL drilling. Thrust force, torque, surface roughness and drill tip temperature approximately reduced 44 %, 67 %, 56 % and 26 % respectively at the 30th hole under nanofluid MQL drilling (with 1.5 wt.% of aluminium oxide nanoparticles) as compared to flood conditions. Moreover, tool wear rate reduced significantly while machining under NFMQL conditions. Better results of nanofluid MQL drilling may be attributed to the fact that NFMQL is capable for producing higher cooling effect due to the lubrication characteristics of nanoparticles.
机译：由于对生态健康相关问题的认识提高，研究人员正在积极寻找可再生和可生物降解的切割润滑剂。由于良好的生物降解性，可再生性和神话般的润滑性能，探索具有固体润滑剂的植物油作为环境有用的润滑剂的潜在来源。虽然向日葵油带来了良好的冷却能力，但它的应用尚未在钻井中进行广泛探讨。因此，在本研究中，实施了具有Al2O3混合植物 - 油基切削液的最小数量润滑（MQL）技术。本实验的主要目的是分析各种冷却剂 - 润滑剂环境（干燥，洪水，纯MQL和纳米流体MQL）的性能，方面是AISI 321钻孔的钻孔力，表面粗糙度，钻头温度和工具磨损机制通过使用HSS钻工具不锈钢。在MQL条件下，冷却剂供应速率和空气压力分别以120ml / hr和6巴固定。除了探索向日葵油的冷却能力之外，将纳米Al2O3加入到向日葵油中以制备不同的浓度（0.5重量％，1.0重量％和1.5重量％）纳米流体。结果表明，与干燥，湿润和纯MQL钻井相比，MQL钻探用Al2O3混合蔬菜 - 油加工切削液实现了更好的性能。与洪水条件相比，推力，扭矩，表面粗糙度和钻头温度分别在纳米流体MQL钻井下的第30孔（含有1.5重量％的氧化铝纳米粒子）下的44％，67％，56％和26％。此外，在NFMQL条件下加工时，工具磨损率显着降低。纳米流体MQL钻孔的更好结果可能归因于由于NFMQ1能够产生由于纳米颗粒的润滑特性而产生更高的冷却效果的事实。

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