International Journal of Advanced Innovative Technology in Engineering (IJAITE)

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Study Of Electric Discharge Machining

Makarand Watane, Dr. Prashant Kumar Singh

Abstract :

High residual thermal stresses are developed on the surfaces of Electric Discharge Machined parts because of the high temperature gradients generated at the gap during Electrical Discharge Machining (EDM) in a small heat-affected zone. These thermal stresses can lead to micro-cracks, decrease in fatigue life and strength and possibly catastrophic failure. The results of the analysis show high temperature gradient zones and the regions of large stresses where, sometimes, they exceed the material yield strength. A transient thermal analysis assuming a Gaussian distribution heat source with temperature dependent material properties can be used to investigate the temperature distribution. In this paper basic review is presented based on different parameters and various methods applied by others to estimate the temperature distribution and thermal stress analysis.

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