Effect of Arc Discharge Pressure on Discharge Current in EDM

Abstract:

In electrical discharge machining (EDM), an electrical discharge occurs between a tool electrode and a work-piece, and removal of materials is carried out by vaporized explosion between the electrode and the work-piece. However, the mechanism of material removal in EDM is not well understood. In order to clarify this issue, the acoustic emission (AE) method has been applied to examine the force of explosion, and the Schlieren visualization method has been applied to observe the explosion. In this study, we investigate the effect of discharge current behavior on the occurrence of the AE waves by means of an optical fiber vibration sensor.

• Periodical: Key Engineering Materials (Volumes 381-382)
• Pages: 451-454
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.381-382.451
• Online since: June 2008
• Authors: Atsutoshi Hirao, S. Tai, H. Takezawa, Naotake Mohri, Kazuro Kageyama, Hideaki Murayama, Yoshiaki Akematsu
• Keywords: Acoustic Emission (AE), Applied Sensor Technology, Current Behavior, Electric Discharge Machining (EDM), Machining, Measurement, Optical Fiber Sensor (OFS)

References

[1] Masanori Kunieda: J. J. Soc. Precision Engineering, Vol. 71(1), 2005, pp.58-62.

[2] Y. Miyake, K. Bando and T. Akasaki: Exp. Thermal and Fluid Science, Vol. 5, 1992, pp.781-789. Vol. 5, 1992, pp.781-789.

DOI: 10.1016/0894-1777(92)90121-k

[3] T. Boczar: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 8 (4), 2001, pp.598-606.

[4] Kazuro Kageyama et al.: IEEE Journal of Light wave Technology, Vol. 24, No. 4, 2006, pp.1768-1775.

[5] Yoshiaki Akematsu et al.: J. J. Soc. Precision Engineering, Vol. 72(6), 2006, pp.804-808. 100μμμμ s 15A Fig. 6 Pulse behavior with a step.