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

被引：67
|
作者：
Govindan, P. [1 ]
Gupta, A. [1 ]
Joshi, Suhas S. [1 ]
Malshe, Ajay [2 ]
Rajurkar, K. P. [3 ]
机构：
[1] Indian Inst Technol, Dept Mech Engn, Bombay 400076, Maharashtra, India
[2] Univ Arkansas, Dept Mech Engn, Fayetteville, AR 72701 USA
[3] Univ Nebraska, Lincoln, NE 68583 USA
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2013年 / 213卷 / 07期
关键词：
Dry EDM; Single-discharge; Crater radius; Magnetic field; DISCHARGE;
D O I：
10.1016/j.jmatprotec.2013.01.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：1048 / 1058
页数：11
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