Vol. 3, Issue 3 (2018)
Modeling and Optimization for different quality characteristics on electric discharge drilling by Taguchi methodology
Author(s): Ankit Jain, Rohit Kumar, Surendra Kumar
Abstract: Among the different advanced machining processes, the electrical discharge drilling may be applied with certain advantages over other processes. But electrical discharge drilling has certain defects or disadvantage at the drill specimen due to sparking such as hole circularity at entry and exit. These may be optimized by selecting the optimum process parameter levels. This study, the experiments have been conducted by well-planned orthogonal array L27 in the electrical discharge drilling of mild steel sheet. For the experimentation, discharge current, pulse on time, pulse off time and dielectric pressure have been selected as input process parameters and hole circularity at entry and exit as output parameters. The multi regression models for hole circularity (entry and exit) have been developed by using the experimental data. The statistical analysis for the developed models shows that the models are reliable and adequate and may be used for predicting these quality characteristics satisfactorily. These quality characteristics have been optimized simultaneously by using the taguchi orthogonal array.