Mathematical and numerical modeling of the effect of input-parameters on the flushing efficiency of plasma channel in EDM process
Author
Shabgard, M.
Ahmadi, R.
Seyedzavvar, M.
Oliaei, S.N.B.
Date
2013Source Title
International Journal of Machine Tools and Manufacture
Print ISSN
0890-6955
Publisher
Elsevier Ltd
Volume
65
Pages
79 - 87
Language
English
Type
ArticleItem Usage Stats
148
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Abstract
In the present study, the temperature distribution on the surface of workpiece and tool during a single discharge in the electrical discharge machining process has been simulated using ABAQUS code finite element software. The temperature dependency of material properties and the expanding of plasma channel radius with time have been employed in the simulation stage. The profile of temperature distribution has been utilized to calculate the dimensions of discharge crater. Based on the results of FEM and the experimental observations, a numerical analysis has been developed assessing the contribution of input-parameters on the efficiency of plasma channel in removing the molten material from molten puddles on the surfaces of workpiece and tool at the end of each discharge. The results show that the increase in the pulse current and pulse on-time have converse effects on the plasma flushing efficiency, as it increases by the prior one and decreases by the latter one. Later, the introduced formulas for plasma flushing efficiency based on regression model were utilized to predict the cardinal parameter of recast layer thickness on the electrodes which demands expensive empirical tests to be obtained. © 2012 Elsevier Ltd. All rights reserved.
Keywords
Electrical discharge machiningMathematical modeling
Numerical analysis
Plasma flushing efficiency
Recast layer thickness
ABAQUS
Efficiency
Electric discharge machining
Finite element method
Mathematical models
Molten materials
Numerical analysis
Plasmas
Regression analysis
Temperature distribution
Tools
Electrical discharge machining
Electrical discharge machining process
Finite element software
Plasma channel radius
Recast layer
Simulation stages
Single discharges
Temperature dependencies
Electric discharges
Permalink
http://hdl.handle.net/11693/21143Published Version (Please cite this version)
http://dx.doi.org/10.1016/j.ijmachtools.2012.10.004Collections
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