Modeling and Simulation of Surface Topography Evolution in Electrical Discharge Machining (EDM)

Abstract:

This paper aims to quantify the effects of the machining condition on the surface topography in electrical discharge machining (EDM), including pulse current, pulse duration and so on. Firstly, the heat source of a single electrical pulse is defined by Gauss distribution, and the thermal effects of machining parameters on the workpiece material erosion are simulated by Finite Element Method (FEM) package ANSYS. Then, the crater size of a single pulse is numerically simulated based on the thermal model of a single pulse discharge. Furthermore, the superposition of multiply craters created by continuous pulse discharges in a random distribution is calculated by MATLAB software program, so that the evolution of the surface topography can be obtained with the combination of FEM simulation and topology calculation. In this way, the surface roughness is quantitatively calculated from the specified EDM parameters.

• Periodical: Advanced Materials Research (Volume 1017)
• Pages: 764-769
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1017.764
• Online since: September 2014
• Authors: Tian Feng Zhou*, Li Zheng Ma, Zhi Qiang Liang, Xi Bin Wang
• Keywords: Electrical Discharge Machining (EDM), Material Removal Model, Micro Crater, Surface Roughness (SR), Surface Topography

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