Thermal Analysis of Workpiece under Electrical Discharge Machining (EDM), Using Hyperbolic Heat Conduction Model

Whereas in electrical discharge machining (EDM) the heat flux entering the workpiece is extremely high, the Fourier heat conduction model may fails. This article reports on determination of temperature distribution in the workpiece due to EDM using non-Fourier heat conduction model. Equations are solved by deriving the numerical solution. The temperature layers and profiles of sample calculations show that it is not acceptable applying the Fourier heat conduction model for estimating the temperature of workpiece. Also, it can be perceived that according to the amount of Vernotte number for a specific Fourier number, it is possible that the temperature of different points of workpiece become even lower than initial temperature.