Mausam, K., Kumar Singh, P., Sharma, K., Gupta, R.C.: Investigation of process parameter of EDM using genetic algorithm (GA) approach for carbon fiber based two phase epoxy composites. Subrahmanyam, M., Nancharaiah, T.: Optimization of process parameters in wire-cut EDM of Inconel 625 using Taguchi’s approach. Talla, G., Gangopadhyay, S., Biswas, C.K.: Effect of powder-suspended dielectric on the EDM characteristics of Inconel 625.

The FESEM and EDS has performed on the machined specimen to analyze the microstructure and chemical composition. Surface roughness of each drilled hole was measured using surface roughness tester and circularity was measured using Quick Image. Also, it was found that circularity improves by 25.85% when Ton is raised from 140 to 160 µs. It was observed that when Toff was increased from 25 to 35 µs the surface roughness enhances by 23.23%. Vibration was given to tool with coin vibration motor which was powered by battery. 9 experiments were conducted via copper tool without vibration and in remaining 9 experiments vibration assisted copper tool was used. There were two levels of tool and rest were assigned three levels. Tool electrode, peak current, pulse on time (T on) and pulse of time (T off) are considered as input parameters.

Total 18 experiments have been performed on Inconel 625 alloy as per the orthogonal array prepared by Minitab software.

In present experimental work ZNC Electrical Discharge Machine has been used to perform the experiments. The more industries digitalize it the more is the degree of automation. Electric discharge machining is one such example of it. With the continuous improvement in manufacturing processes there is an amalgamation of digital technology with traditional concepts.

Minitab 19 mac