Experimental evaluation of minimum quantity lubrication in near micro-milling |
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| Authors: | Kuan-Ming Li Shih-Yen Chou |
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| Affiliation: | 1. Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan;2. Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan;1. Mechanical Engineering Department, McGill University, Montreal, QC, Canada;2. Structure, Materials, Manufacturing Laboratory, Aerospace Manufacturing, National Research Council Canada (NRC), Canada;3. Aero-Thermo-Mechanics Department, Université Libre de Bruxelles, Brussels, Belgium;4. Tecnolub Systems Inc., Recht, Belgium;1. Faculty of Technical Education, Department of Mechanical Education, Afyon Kocatepe University, 03200 Afyonkarahisar, Turkey;2. Faculty of Technology, Department of Mechanical Engineering, Afyon Kocatepe University, 03200 Afyonkarahisar, Turkey;3. Faculty of Engineering and Architecture, Department of Mechanical Engineering, Süleyman Demirel University, 32000 Isparta, Turkey;1. School of Mechanical and Aerospace Engineering, Seoul National University, Gwanak-Ro 1, Gwanak-Gu, Seoul 151-744, Republic of Korea;2. Institute of Advanced Machinery and Design, Seoul National University, Gwanak-Ro 1, Gwanak-Gu, Seoul 151-744, Republic of Korea;1. Department of Mechanical Engineering and Civil Construction, Universitat de Girona, Av. Lluis Santaló s/n, 17071 Girona, Spain;2. Centro de Innovación en Diseño y Tecnología, Tecnológico de Monterrey, Campus Monterrey, Mexico |
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| Abstract: | This paper presents the performance of the minimum quantity lubrication (MQL) technique in near micro-milling with respect to dry cutting on the basis of tool wear, surface roughness and burr formation. The effects of tool materials, oil flow rate and air flow rate on tool performance in MQL cutting are also studied. It is found that the application of MQL will significantly improve the tool life, surface roughness and burr formation compared to those in dry cutting based on slotting tests with micro-end mills on a meso-scale machine tool. It is also observed that the values of surface roughness are close related to the tool-wear conditions in micro-cutting. Based on the experimental results, it is presumed that the maximum allowable tool flank wear of the 600-μm micro-tool is 80 μm while the surface finish quickly deteriorates after the tool flank wear reaches 80 μm and the tool breaks soon after the tool wear reaches 100 μm. The optimal lubrication conditions in this study are oil flow rate of 1.88 ml/h and air flow rate of 40 l/min. It is also found that the air flow rate has a more significant influence on tool life than the oil flow rate under MQL conditions in this study. |
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