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Single-spark analysis of removal phenomenon in magnetic field assisted dry EDM

DSpace at IIT Bombay

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Title Single-spark analysis of removal phenomenon in magnetic field assisted dry EDM
 
Creator GOVINDAN, P
GUPTA, A
JOSHI, SS
MALSHE, A
RAJURKAR, KP
 
Subject Dry EDM
Single-discharge
Crater radius
Magnetic field
DISCHARGE
GAS
 
Description The increased MRR in magnetic field assisted dry EDM (by similar to 130%) was attributed to several reasons including confinement of plasma due to Lorentz forces. The conjectures were investigated further by undertaking over 100 single-discharge, dry and liquid EDM trials, with and without magnetic fields, by varying current, voltage, magnetic field, pulse on-time and bi-pulse current. The magnetic field assistance increased the depth and reduced crater diameter by 80% in dry EDM; and reduced crater diameter marginally but significantly improved uniformity in the material erosion, in liquid EDM. The role of Lorentz forces in confining plasma and reduction in electron mean free path due to magnetic field, when modeled analytically, captured the experimental trends very well. (C) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE SA
 
Date 2014-10-16T13:24:28Z
2014-10-16T13:24:28Z
2013
 
Type Article
 
Identifier JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 213(7)1048-1058
http://dx.doi.org/10.1016/j.jmatprotec.2013.01.016
http://dspace.library.iitb.ac.in/jspui/handle/100/15658
 
Language en