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EFFECT OF CURRENT AND ELECTRODE MATERIAL ON MATERIAL REMOVAL RATE (MRR) AND SURFACE ROUGHNESS (RA) IN EDM PROCESS | ||
| AL-TAQANI | ||
| Article 1, Volume 30, Issue 1, 2017, Pages 0-0 | ||
| Authors | ||
| Baqer Ayad Ahmed; Ahmed Basil Abdul wahhab | ||
| Abstract | ||
| Over the past decades, electrical discharge machining (spark machining) has been one of most widely used non-conventional manufacturing process for machining hard metals. It is considered as an electro-thermal machining process, in that the thermal energy resulted from the electric discharge (the spark) is utilized in removing materials from the workpiece. In this study the EDM is used to remove metal from the workpiece (Medium carbon steel alloy) using two types of electrodes (copper and brass) with different values of machining current (10, 20,30,and 40)A. The effects of current and electrode material on the material removal rate (MRR), tool wear rate (TWR), and surface roughness have been investigated. The results show that higher MRR, lower TWR and smother surface is obtained with the copper electrode compared with the brass tool. Higher MRR values with using copper electrode are (59.92, 65.42, 61.51, and 60.77) % at machining current (10, 20, 30, and 40) Ampere respectively. | ||
| Keywords | ||
| EDM; Surface Roughness; MRR; TWR | ||
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