FEM modeling for predicting temperature profile of heat affected zone in single spark EDM process
DOI:
https://doi.org/10.58368/MTT.22.5.2023.56-62Keywords:
Single Spark Analysis, Electrical Discharge Machining, Heat Affected Zone, Finite Element ModelAbstract
Existing single spark models are far from accurate since they are based on simplified considerations like constant plasma radius, constant material characteristics, and constant surface temperature during actual discharge application. This work depicts a simulation study of a single spark during EDM using finite element method while taking into account the important factors like temperature dependence of material characteristics, plasma channel radius variations with current, and discharge duration. This model offers a more realistic temperature distribution profile in the workpiece. FEM simulation shows that increasing pulse on-time results in a greater depth of heat-affected zone, and increasing pulse current results in a modest decrease in heat-affected zone depth due to variation in spark radius.
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