Analysis of EDM Process: A Finite Element Approach

Abstract

A model has been proposed for predicting the material removal rate and depth of damaged layer during Electro Discharge Machining (EDM). The transient heat conduction equation for the workpiece which accounts for the heat absorption due to melting, has been solved by the finite element method (FEM). Gaussian heat distribution of power within a spark has been considered and unlike in earlier theoretical works, the periodical updating of the shape of the workpiece surface has been performed. Computations have been performed for a single spark in the form of a pulse and a multi-sparks situation with a continuous power input and zero off time. The estimated results match fairly well with the experimental results.

Thermal Modeling and Structural Analysis in Wire EDM Process for a 3D Model

“…The model is assumed to produce Gaussian distribution of heat flux on the area of anode. P. Madhu et al [2] created a model for predicting the depth of damaged layer and material removal rate during EDM. They concluded that MRR increases when the power per spark increases and decreases when the computational machining cycle time increases.…”