Experimental Investigation on Dry Electrical Discharge Drilling

Abstract:

The electrical dischargemachining (EDM) is known as the machining method in which the material removalis the result of developing electrical discharges having certain energetic andtemporal characteristics between the workpiece and the active surface of thetool electrode, while a dielectric liquid is circulated in the gap, essentiallyin order to remove debris. The last decades showed that in certain conditions,the dielectric liquid could be replaced by gaseous dielectric fluids, theprocess being named dry EDM. In the paper, some preliminary considerations areformulated about the material removal process for dry EDM drilling. Experimental researches were developed byconsidering the modifying of the values of some electrical characteristics(peak current, on time, off time and applied voltage) and determining thequantity of material removed from the test piece and the wear of the toolelectrode. The experimental results were mathematically processed and empiricalrelations were determined; these mathematical relations highlight the influenceexerted by the input parameters on the material removal rate.

• Periodical: Key Engineering Materials (Volumes 554-557)
• Pages: 1845-1850
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.554-557.1845
• Online since: June 2013
• Authors: Margareta Coteaţă, Irina Besliu, Hans Peter Schulze, Nicolae Pop, Laurenţiu Slătineanu
• Keywords: Dielectric Fluid, Dry EDM, Material Removal Rate (MRR), Tool Electrode Wear

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