Effect of Arc Discharge Pressure on Discharge Current in EDM
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.
Wei Gao, Yasuhiro Takaya, Yongsheng Gao and Michael Krystek
A. Hirao et al., "Effect of Arc Discharge Pressure on Discharge Current in EDM", Key Engineering Materials, Vols. 381-382, pp. 451-454, 2008