INFLUENCE OF ULTRASONIC SPATIAL WAVES OVER EFFICIENCY IMPROVEMENT TO WEDM PROCESS

  • Viorel Mihai Nani University Politehnica Timisoara, Research Institute for Renewable Energy
Keywords: WEDM processing, wire electrode ultrasonic activation, erosive capacity, shape deviation, surface roughness, spatial waves

Abstract

The paper presents results of experimental research for the processing efficiency improvement of the Wire-Cut Electrical Discharge Machines. These machines use a wire like an electrode and are abbreviated WEDM. The WEDM machines were equipped with special devices for the simultaneous ultrasonic activation of the wire electrode in two points after two rectangular directions in space. It was noticed that the ultrasound energy which was introduced in the working environment, influenced the performance parameters of the machining process. The erosion capacity variation, accuracy, shape deviation and roughness for different materials, depending on how were prescribed the technological parameters (the intensity for dielectric breakdown and the ultrasound generators power), is presented under graphic and tabular form.

References

[1] Liu S., Hunag Y., Li Y., A plate capacitor model of the EDM process based on the field emission theory, International Journal of Machine Tools Manufacturing, 51(7):653-9, 2011
[2] Mironoff N.L., Introduction in electrodischarge study, Publishing Micro technical, Switzerland, 1970
[3] D’Urso G., Merla C., Workpiece and electrode influence on micro-EDM drilling performance, Precision Engineering, 38(4):903-14, 2014
[4] Mironoff N.L.,Thermal effects of erosive pulses, ISEM 5, Wolfsberg, 1977
[5] Nanu A., Nanu D., Dimensional processing by electrical erosion in magnetic field, Facla Publishing, Timisoara, 1981
[6] Wong Y., Rahman M., Lim H., Han H., Ravi N., Investigation of Micro-EDM Material Removal Characteristics Using RC-Pulse Discharges, Journal of Materials Processing Technology, 140 (1-3): 303-307, 2003
[7] Nichici Al., Popovici V., Nica M., Achimescu N., Popa H., Paulescu Gh., Processing by erosion in machine building, Facla Publishing, Timisoara, 1983
[8] Chinmaya P.M., Sahu J., Mahapatra S.S., Thermal-structural analysis of electrical discharge machining process, Procedia Engineering, 51, 508-513, 2013
[9] Chinmaya P.M., Siba S.M., Manas R.S., A particle swarm approach for multi-objective optimization of electrical discharge machining process, Journal of Intelligent Manufacturing, Online First Articles, 1-20, 12 July 2014
[10] Kitamura T., Kunieda M., Clarification of EDM Gap Phenomena Using Transparent Electrodes, CIRP Annals 63 (1):213-216, 2014
[11] Okada A., Uno Y., Nakazawa M., Yamauchi T., Evaluation of spark distribution and wire vibration in wire EDM by high-speed observation, CIRP Annals, 59 (1), 231-234, 2010
[12] Ho K.H., Newman S.T., Rahimifard S., Allen R.D., State of the art in wire electrical discharge machining (WEDM), International Journal of Machine Tools and Manufacturing, 44 (12), 1247-1259, 2004
[13] Jun Q., Fei Y., Jun W., Bert L., Dominiek R., Material removal mechanism in low-energy micro-EDM process, CIRP Annals-Manufacturing Technology, 64, 225-228, 2015
[14] Loeb L.B., Meek J.M. The Mechanism of the Electric Sparks, Stanford University Press, ed. 1977
[15] Miţkevici M.K., Ob elektroerozionnom effekte na vibrinuişcih elektrodah, Fiziceskie osnovi elektroiskrovoi obrabotki materiallov, Editura Nauka, Moscova, 1966
[16] Nani V.M., Ultrasound influence on the erosive capacity at the electrodischarge processing with ultrasonic activated wire electrode in a single point, Meccanica, 52, 1459–1474, DOI: 10.1007/s11012-016-0467-2, 2017
[17] Nani V.M., Ultrasonic activation of the wire electrode on EDM processing machine, ISBN: 978-3-659-68755-6, LAP LAMBERT Academic Publishing, Germany, 2015
[18] Ikeda M.,The movement of a bubble in the gap depending on the single electrical discharge (first report), Journal of The Japon of Electrical Machining Engineers, 6 (11): 12-26, 1972
[19] Murti V.S.R., Philip P.K., An analysis of the debris in ultrasonic-assisted electrical discharge machining, Wear 117, 241-250, 1987
[20] Inoue K., Procédé et dispositif pour le traitement par érosion électrique avec électrode filiforme vibrant, Brevet France, no 2 350 919/07.10.1979, 1979
[21] Savii Gh., Nani V.M., Militaru C., Muntean N., Method and device for ultrasonic activation wire electrode, Romanian Patent, no 102596/12.12.1988, 1988
[22] Chen Z., Huang Y., Huang H., Zhang Z., Zhang G.,Three-dimensional characteristics analysis of the wire-tool vibration considering spatial temperature field and electromagnetic field in WEDM, International Journal of Machine Tools&Manufacture, 92, 85-96, 2015
[23] Hayakawa S., Sasaki Y., Itoigawa F., Nakamura T., Relationship Between Occurence of Material Removal and Bubble Expansion in Electrical Discharge Machining, Procedia CIRP 6:174-179,
[24] Cetin S., Okada A., Uno Y., Effect of Debris Accumulation on Machining Speed in EDM, International Journal of Electrical Machining, 9: 9-14, 2004
[25] SC STIMEL SA Timisoara Company, Romanian, Electrodischarge processing machine with wire electrode and numerical command by type ELEROFIL-10, Technical Paper, 2002
[26] Nani V.M., Activation ultrasonic methods of wire electrode used in electrodischarge processing, Copybook for Acoustics, Romanian Academy Publishing, no 28, 41 – 44, 1992
[27] Yamada H., Mohri N., Saito N., Magara T., Modal analysis of wire electrode vibration in wire-EDM, International Journal of Electrical Machining, 19-24, 1997
[28] Silaş Gh., Rădoi M., Brîndeu L., Klepp M., Hegedus A., Collection of problems for mechanical vibrations, Technical Publishing House, Bucharest,
[29] Nani V.M., Effect of wire electrode's ultrasonic vibration on erosive capacity to W-EDM machines, International Journal of Advanced Manufacturing Technology, 88, 425-441, DOI: 10.1007/ s00170-016-8752-8, 2016
[30] Nani V.M., The ultrasound effect on technological parameters for increase in performances the W-EDM machines, International Journal of Advanced Manufacturing Technology, 88, 519-528, DOI: 10.1007/ s00170-016-8783-1, 2016
Published
2017-09-29
How to Cite
Nani, V. (2017). INFLUENCE OF ULTRASONIC SPATIAL WAVES OVER EFFICIENCY IMPROVEMENT TO WEDM PROCESS. Nonconventional Technologies Review, 21(3). Retrieved from http://revtn.ro/index.php/revtn/article/view/204