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RESEARCH PAPERS

Formation and Ejection of EDM Debris

[+] Author and Article Information
K. P. Rajurkar

Industrial and Management Systems, Engineering Dept., University of Nebraska, Lincoln, NE 68588

S. M. Pandit

Mechanical Engineering and Engineering Mechanics Dept., Michigan Technological University, Houghton, MI 49931

J. Eng. Ind 108(1), 22-26 (Feb 01, 1986) (5 pages) doi:10.1115/1.3187036 History: Received July 19, 1985; Online July 30, 2009

Abstract

This paper presents a theoretical and experimental investigation into the debris formation and ejection mechanism. An expression for the size of a debris particle is derived using the drop formation energy and the kinetic energy of the ejected debris particle. The velocity of the ejected particle is obtained from expressions derived on the basis of the analysis of hydrodynamic propagation of shock waves generated due to electrical breakdown in dielectric. The debris particles were collected by machining AISI 1020 steel under various operating conditions. The projected areas were measured by a microscope following the standard procedure of particle size measurement. The particle size has been found to be log normally distributed. The experimental values of debris size compare well with the theoretical estimation indicating the validity of the proposed analysis.

Copyright © 1986 by ASME
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