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

P. Govindan; A. Gupta; Suhas S. Joshi; Ajay Malshe; K. P. Rajurkar

doi:10.1016/j.jmatprotec.2013.01.016

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

P. Govindan, A. Gupta, Suhas S. Joshi, Ajay Malshe, K. P. Rajurkar

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

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.

Original language	English
Journal	Journal of Materials Processing Technology
Volume	213
Pages (from-to)	1048-1058
ISSN	0924-0136
DOIs	https://doi.org/10.1016/j.jmatprotec.2013.01.016
Publication status	Published - 2013
Externally published	Yes

Keywords

Crater radius
Dry EDM
Magnetic field
Single-discharge

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title = "Single-spark analysis of removal phenomenon in magnetic field assisted dry EDM",

abstract = "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.",

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author = "P. Govindan and A. Gupta and Joshi, {Suhas S.} and Ajay Malshe and Rajurkar, {K. P.}",

year = "2013",

doi = "10.1016/j.jmatprotec.2013.01.016",

language = "English",

volume = "213",

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journal = "Journal of Materials Processing Technology",

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T1 - Single-spark analysis of removal phenomenon in magnetic field assisted dry EDM

AU - Govindan, P.

AU - Gupta, A.

AU - Joshi, Suhas S.

AU - Malshe, Ajay

AU - Rajurkar, K. P.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - Crater radius

KW - Dry EDM

KW - Magnetic field

KW - Single-discharge

U2 - 10.1016/j.jmatprotec.2013.01.016

DO - 10.1016/j.jmatprotec.2013.01.016

M3 - Journal article

SN - 0924-0136

VL - 213

SP - 1048

EP - 1058

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

ER -

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

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Keywords

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