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      Mathematical and numerical modeling of the effect of input-parameters on the flushing efficiency of plasma channel in EDM process

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      Author
      Shabgard, M.
      Ahmadi, R.
      Seyedzavvar, M.
      Oliaei, S.N.B.
      Date
      2013
      Source Title
      International Journal of Machine Tools and Manufacture
      Print ISSN
      0890-6955
      Publisher
      Elsevier Ltd
      Volume
      65
      Pages
      79 - 87
      Language
      English
      Type
      Article
      Item Usage Stats
      148
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      225
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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 machining
      Mathematical 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/11693/21143
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.ijmachtools.2012.10.004
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      • Department of Mechanical Engineering 254
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