Study on Single-Pulse Discharges under Special Flushing Conditions

Abstract:

Investigations on the special flushing conditions with an electrical discharge drilling machine were done to analyze single discharges. While flushing speeds in electrical discharge drilling are quiet higher as in electrical discharge sinking, the craters are influenced by the strong flushing. The topography of the craters in terms of depth, length and volume were analyzed. Crater depth and crater length are increasing with higher flushing speeds. Under a dielectric flushing the removed material on the tool electrode is less than on the workpiece. If the volume flow is high enough, the whole plasma channel is pushed in the direction of the flow. A computational fluid dynamics analysis was done to simulate the flow speeds in the narrow gap. Flow speeds above 500 m/s were simulated in the gap.

• Periodical: Key Engineering Materials (Volumes 504-506)
• Pages: 1183-1188
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.504-506.1183
• Online since: February 2012
• Authors: Markus Munz, David Sternkopf, Rüdiger Haas
• Keywords: EDM Drilling, Single-Pulse Discharges, Volume Flow

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