Abstract
Near-dry electric discharge machining (EDM) is a process variant of EDM, which uses two-phase flow of liquid and gas as dielectric medium. This article reports the results of an investigation pertaining to the drilling of holes on high speed steel (T2 grade) by a rotary tool near-dry EDM . The One-Factor-At-a-Time (OFAT) approach was used for experimentation. The effects of process parameters, viz. tool rotation speed, peak current, pulse duration, gas pressure and liquid flow rate on material removal rate (MRR) and overcut were investigated. The dielectric medium used was a mixture of glycerin-air. The experimental results reveal that rotation of the tool electrode along with high pressure of two-phase dielectric medium contribute in an effective flushing of inter electrode gap (IEG). Further, in rotary tool near-dry EDM process, higher values of current can be used. This improves process economics in terms of MRR. The MRR measured with rotary tool near-dry EDM was three to four times higher in comparison with conventional EDM. Additionally, appreciable surface quality was achieved.
References
NASA, Inert-gas electrical-discharge machining. NASA Technical Brief No. NPO-15660 (1985)
M. Kunieda, M. Yoshida, Electrical discharge machining in gas. Ann. ClRP 46, 143–146 (1997)
Q.H. Zhang, J.H. Zhang, S.F. Ren, J.X. Deng, X. Ai, Study on technology of ultrasonic vibration aided electrical discharge machining in gas. J. Mater. Process. Technol. 149, 640–644 (2004)
S. Joshi, P. Govindan, A. Malshe, K. Rajurkar, Experimental characterization of dry EDM performed in a pulsating magnetic field. CIRP Ann. Manufact. Technol. 60, 239–242 (2011)
M. Kunieda, Y. Mlyoshl, T. Tsutomu, High speed 3D milling by dry EDM. CIRP Ann. Manufact. Technol. 52, 147–150 (2003)
M. Kunieda, T. Takaya, S. Nakano, Improvement of dry EDM characteristics using piezoelectric actuator. CIRP Ann. Manufact. Technol. 53, 183–186 (2004)
C.C. Kao, J. Tao, S.W. Lee, A.J. Shih, Dry wire electrical discharge machining of thin workpiece. Trans. NAMRI/SME 34, 253–260 (2006)
T. Tanimura, K. Isuzugawa, I. Fujita, A. Iwamoto, T. Kamitani, Development of EDM in the mist. in Proceedings of Ninth International Symposium of Electro Machining (ISEM IX) (Nagoya, Japan, 1989), pp. 313–316
J. Tao, A.J. Shih, J. Ni, Experimental study of the dry and near-dry electrical discharge milling processes. J. Manuf. Sci. Eng. 130, 11002–11009 (2008)
J. Tao, Investigation of dry and near-dry electrical discharge milling processes. A dissertation, The University of Michigan, 2008
M. Fujiki, J. Ni, A.J. Shih, Investigation of the effects of electrode orientation and fluid flow rate in near-dry EDM milling. Int. J. Mach. Tools Manuf. 49, 749–758 (2009)
K. Dhakar, A. Dvivedi, Parametric evaluation on near-dry electric discharge machining. Mater. Manuf. Process. 31, 413–421 (2016)
K. Dhakar, A. Dvivedi, A. Dhiman, Experimental Investigation on effects of dielectric mediums in near-dry electric discharge machining. J. Mech. Sci. Technol. 30, 2179–2185 (2016)
X. Qu, C.F. Wu, One-factor-at-a-time designs of resolution V. J. Stat. Plann. Infer 131, 407–416 (2005)
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© 2017 The Minerals, Metals & Materials Society
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Yadav, V.K., Kumar, P., Dvivedi, A. (2017). Investigations on Rotary Tool Near-Dry Electric Discharge Machining . In: Wang, S., Free, M., Alam, S., Zhang, M., Taylor, P. (eds) Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51091-0_31
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DOI: https://doi.org/10.1007/978-3-319-51091-0_31
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