An Experimental Investigation of Electrode Wear Rate (EWR), Material Removal Rate (MRR) and Radial Overcut (ROC) in EDM of High Carbon-High Chromium Steel (AISI D3)
Pravin R. Kubade1, V. S. Jadhav2
1Pravin R. Kubade, Mechanical Engineering Department Govt. College of Engg, Karad–Maharashtra, India.
2V. S. Jadhav, Mechanical Engineering Department Govt. College of Engg., Karad–Maharashtra, India.
Manuscript received on may 27, 2012. | Revised Manuscript received on June 22, 2012. | Manuscript published on June 30, 2012. | PP: 135-140 | Volume-1 Issue-5, June 2012 | Retrieval Number: E0453061512/2012©BEIESP

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Abstract: This study investigates the influence of EDM parameters on EWR, MRR and ROC while machining of AISI D3 material. The parameters considered are pulse-on time (Ton), peak current (Ip ), duty factor (t) and gap voltage (Vg ). The experiments were performed on the die-sinking EDM machine fitted with a copper electrode. The experiments planned, conducted and analyzed using Taguchi method. It is found that the MRR is mainly influenced by (Ip ); where as other factors have very less effect on material removal rate. Electrode wear rate is mainly influenced by peak current (Ip ) and pulse on time (Ton), duty cycle (t) and gap voltage (Vg ) has very less effect on electrode wear rate. Peak current (Ip ) has the most influence on radial overcut then followed by duty cycle (t) and pulse on time (Ton) with almost very less influence by gap voltage (Vg ). 
Keywords: AISI D3; EDM; Radial overcut, duty factor.