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http://dx.doi.org/10.7736/KSPE.2017.34.4.247

Improvement of the Quality of Cryogenic Machining by Stabilization of Liquid Nitrogen Jet Pressure  

Gang, Myeong Gu (Department of Mechanical Engineering, Yonsei University)
Min, Byung-Kwon (Department of Mechanical Engineering, Yonsei University)
Kim, Tae-Gon (Manufacturing System Group, Korea Institute of Industrial Technology)
Lee, Seok-Woo (Manufacturing System Group, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.34, no.4, 2017 , pp. 247-251 More about this Journal
Abstract
Titanium alloy has been widely used in the aerospace industry because of its high strength and good corrosion resistance. During cutting, the low thermal conductivity and high chemical reactivity of titanium generate a high cutting temperature and accelerates tool wear. To improve cutting tool life, cryogenic machining by using a liquid nitrogen (LN2) jet is suggested. In cryogenic jet cooling, evaporation of LN2 in the tank and transfer tube could cause pressure fluctuation and change the cooling rate. In this work, cooling uniformity is investigated in terms of liquid nitrogen jet pressure in cryogenic jet cooling during titanium alloy turning. Fluctuation of jet spraying pressure causes tool temperature to fluctuate. It is possible to suppress the fluctuation of the jet pressure and improve cooling by using a phase separator. Measuring tool temperature shows that consistent LN2 jet pressure improves cryogenic cooling uniformity.
Keywords
Ti-6Al-4V; Difficult-to-cut material; Machining temperature; Surface integrity; Turning;
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1 Ezugwu, E., Bonney, J., and Yamane, Y., "An Overview of the Machinability of Aeroengine Alloys," Journal of Materials Processing Technology, Vol. 134, No. 2, pp. 233-253, 2003.   DOI
2 Boyer, R., “An Overview on the Use of Titanium in the Aerospace Industry,” Materials Science and Engineering: A, Vol. 213, No. 1, pp. 103-114, 1996.   DOI
3 Ezugwu, E. and Wang, Z., “Titanium Alloys and their Machinability-A Review,” Journal of Materials Processing Technology, Vol. 68, No. 3, pp. 262-274, 1997.   DOI
4 Bermingham, M., Palanisamy, S., Kent, D., and Dargusch, M., "A Comparison of Cryogenic and High Pressure Emulsion Cooling Technologies on Tool Life and Chip Morphology in Ti-6Al-4V Cutting," Journal of Materials Processing Technology, Vol. 212, No. 4, pp. 752-765, 2012.   DOI
5 Hong, S. Y. and Ding, Y., “Cooling Approaches and Cutting Temperatures in Cryogenic Machining of Ti-6Al-4V,” International Journal of Machine Tools and Manufacture, Vol. 41, No. 10, pp. 1417-1437, 2001.   DOI
6 Nandy, A., Gowrishankar, M., and Paul, S., “Some Studies on High-Pressure Cooling in Turning of Ti-6Al-4V,” International Journal of Machine Tools and Manufacture, Vol. 49, No. 2, pp. 182-198, 2009.   DOI
7 Yuan, S., Yan, L., Liu, W., and Liu, Q., “Effects of Cooling Air Temperature on Cryogenic Machining of Ti-6Al-4V Alloy,” Journal of Materials Processing Technology, Vol. 211, No. 3, pp. 356-362, 2011.   DOI
8 Park, K.-H., Yang, G.-D., Lee, M.-G., Jeong, H., Lee, S.-W., et al., “Eco-Friendly Face Milling of Titanium Alloy,” Int. J. Precis. Eng. Manuf., Vol. 15, No. 6, pp. 1159-1164, 2014.   DOI
9 Rozzi, J. C., Sanders, J. K., and Chen, W., "The Experimental and Theoretical Evaluation of an Indirect Cooling System for Machining," Journal of Heat Transfer, Vol. 133, No. 3, Paper No. 031006, 2011.
10 Obikawa, T., Funai, K., and Kamata, Y., "Air Jet Assisted Machining of Titanium Alloy," Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol. 5, No. 2, pp. 139-149, 2011.   DOI
11 Young, H.-T., “Cutting Temperature Responses to Flank Wear,” Wear, Vol. 201, No. 1, pp. 117-120, 1996.   DOI
12 Dandekar, C. R., Shin, Y. C., and Barnes, J., “Machinability Improvement of Titanium Alloy (Ti-6Al-4V) Via LAM and Hybrid Machining,” International Journal of Machine Tool and Manufacture, Vol. 50, No. 2, pp. 174-182, 2010.   DOI
13 Bernoulli, D., "Hydrodynamica," https://pure.tudelft.nl/portal/files/4414689/Westerweel2016b.pdf (Accessed 21 MAR 2017)