Journals Proceedings

Abstract

The electrical discharge machining (EDM) is one of the latest non-traditional machining processes, based on thermoelectric energy between the workpiece and an electrode. In this machining process, the material is removed electrothermally by a series of successive discrete discharges between two electrically conductive materials (electrode and workpiece). The performance of the machining process depends on the material, design and manufacturing method of the electrodes. Usually, the machine manufacturer uses the standard workpiece and electrode materials to establish the EDM parameter settings. The present study focused on the effect of Copper and Brass electrodes on material removal rate (MRR) and tool wear rate (TWR) for AISI D2 tool steel by using Die- Sinker EDM. The current was varied from 4 to 10 amp, the voltage and flushing pressure were constant, the MRR for copper electrode was in the range of 4.8139 -22.6580 mm3/min whereas the range of MRR for brass electrode was 7.2213-9.8203 gm/min. The trend of TWR as shown in results increases with current for both the electrodes. The effect of voltage on MRR and TWR for both the electrodes was analyzed. The MRR for copper electrode was continuously decreasing with voltage whereas MRR for brass don’t follow any specific trend. The TWR for both the electrodes decreases with voltage. It has been observed that copper electrode is the best for machining AISI D2 tool steel by using Die- Sinker EDM.