Effect of Flow Field on Cutting Fluid Penetration during Minimum Quantity Lubrication (MQL) Machining

Abstract:

In order to study the mechanism of cutting fluid penetration during minimum quantity lubrication (MQL) machining, the flow field in cutting area was investigated through both theoretical analysis and computational fluid dynamics (CFD) simulation on the basis of cutting experiments. Combining the capillary model of cutting fluid penetration, the flow field in the wedge-shaped area beside major flank of the tool was analyzed in detail. It was found that the flow pressure at the wedge angle was lower than the outer. It was favorable for cutting fluid to penetrate into the main cutting edge. Besides, the air supply pressure of MQL has great impact on cutting fluid droplet track. Proper air supply pressure was in favor of cutting fluid penetration.

• Periodical: Advanced Materials Research (Volume 188)
• Pages: 61-66
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.188.61
• Online since: March 2011
• Authors: W.J. Zheng, Hong Jie Pei, Gui Cheng Wang, C.G. Shen
• Keywords: Air Supply Pressure, Capillary, Cutting Fluid Penetration, Droplet Track, Minimum Quantity Lubrication (MQL)

References

[1] Weinert K, Inasaki I, Sutherland J W, et al. Dry Machining and Minimum Quantity Lubrication [J]. Annals CIRP, 2004, 53(2): 511-537.

DOI: 10.1016/s0007-8506(07)60027-4

[2] Toshiyuki Obikawa, Yasuhiro Kamata, Yuki Asano, et al. Micro-liter lubrication machining of Inconel 718 [J]. International Journal of Machine Tools & Manufacture, 2008, 48: 1605-1612.

DOI: 10.1016/j.ijmachtools.2008.07.011

[3] Kamata Y, Obikawa T. High speed MQL finish-turning of Inconel 718 with different coated tools [J]. Journal of Materials Technology, 2007, 192-193: 281-286.

DOI: 10.1016/j.jmatprotec.2007.04.052

[4] Toshiyuki Obikawa, Yasuhiro Kamata, Jun Shinozuka. High-speed grooving with applying MQL [J]. International Journal of Machine Tools & Manufacture, 2006, 46: 1854-1861.

DOI: 10.1016/j.ijmachtools.2005.11.007

[5] Toshiyuki Obikawa, Yuki Asano, Yasuhiro Kamata. Computer fluid dynamics analysis for efficient spraying of oil mist in finish-turning of Inconel 718 [J]. International Journal of Machine Tools & Manufacture, 2009, 46: 971-978.

DOI: 10.1016/j.ijmachtools.2009.06.002

[6] MA Lijie, WANG Guicheng, ZHANG Chunyan. Application of Minimum Quantity Lubricant in Vibration Drilling[J]. Journal of Mechanical Engineering, 2009, 45(1): 223-234.

DOI: 10.3901/jme.2009.01.223

[7] J AWilliams, D Tabor. Role of lubricants in machining [J]. Wear, 1977 (3): 275 - 292.

[8] J A Williams. The Action of Lubricants in Metal Cutting [J]. Journal Mechanical Engineering, 1977 (5): 202 - 212.

[9] V A Godlevski, A V Volkov. The Kinetics of Lubricant Penetration Action during Machining [J]. Lubrication Science, 1997 (9) : 127 - 140.

DOI: 10.1002/ls.3010090203

[10] V A Godlevski, A V Volkov. A Description of the Lubricating Action of the Tribo-Active Components of Cutting Fluids [J]. Lubrication Science, 1998 (11): 51 - 62.

DOI: 10.1002/ls.3010110106

[11] Han Rongdi, Liu Junyan. The Kinetic Modeling of Cutting Fluid Penetrated Capillary During Machining [J]. LUBRICATION ENGINEERING, 2005(167): 31-36.

[12] Zheng Wenjie, Pei Hongjie, Wang Guicheng. Study on Less Fluid Cutting Mechanism [J]. Tool Engineering, 2008, 42(10): 64~67.

[13] Guo Yonghuai. The boundary layer theory [M]. Hefei: University of science and technology of China press, (2008).

[14] Wu Minjing. Status and Trends of MQL Machining [J]. AVIATION PRECESION MANUFACTURING TECHNOLOGY. 2004, 40(1): 24-26.