The purpose of any electrode in die-sinking EDM is to transmit electrical impulses that facilitate workpiece erosion with minimum or no self-erosion. The performance of the electrode depends on the properties of the material that it is made of, application, and the workpiece material. This study focused on employing intensive machining regimes that increase productivity while maintaining electrode wear as low as possible to enhance cost-effectiveness. The experimental tests were organized using the response surface method and the analysis of the results is based on the ANOVA method. The findings revealed that the WCu 75/25 outperforms the other two in wear resistance and CuZn39Pb2 is the most wear prone. It was revealed that WCu 75/25 electrode at Ip ≈ 90 A and Ton between 360 and 390 µs represents the globally best solution for a minimum wear.
Herghelegiu et al. (Thu,) studied this question.