Experimental Investigation of Iso Energy Pulse Generator on Performance Measures in EDM

It is important to improve the process mechanism of the electrical discharge machining (EDM) to achieve fine surface quality due to its stochastic nature. The conventional transistor pulse generator produces higher surface roughness in electro-erosion process. In the present study, an attempt has been made to investigate the influence of iso (identical) energy pulse generator on machining characteristics of erosion process. The modified pulse generator can produce uniform discharge energy distribution which is characterized by variable pulse width modulation adopted with the current sensor. The proposed pulse generator can control the ionization path diameter of insulator medium by varying the pulse duration. From the experimental results, it has been observed that the modified iso energy pulse generator has improved the surface quality with higher material removal rate (MRR). The iso energy pulse generator has removed 5% more material from the work piece than the conventional transistor pulse generator. It has also viewed that the modified iso energy pulse generator has generator 40% lower surface roughness than the conventional transistor pulse generator. It has also observed that the modified pulse controller could considerably minimize the arcing effect in the machining process.