*Associate professor, Department of Mechanical Engineering, Sri Indu Institute of Engineering & Technology, Affiliated to JNTU, Sheriguda, Hyderabad, kukatpally, Hyderabad, India
**Associate professor, Department of Mechanical Engineering, Gurunanak institutions technical campus, Affiliated to JNTU, Ibrahimpatnam, Hyderabad, kukatpally, Hyderabad, India
Online published on 20 July, 2015.
In the present work an attempt is made to find out the effect of machining parameter such as discharge current, pulse on time and diameter of tool on metal removal rate, tool wear rate, over cut. A well designed experimental scheme was used to reduce the total number of experiments. Parts of the experiments were conducted with the L18 orthogonal array based on the Taguchi method. Moreover, the signal-to-noise ratios associated with the observed values in the experiments were determined to find which factor is most affected by the Responses of Material Removal Rate (MRR), Tool Wear Rate (TWR) and over cut (OC). Discharge current is most influencing factor on MRR and then pulse duration time and the last is diameter of the tool. MRR increased with discharge current (I). As the pulse duration extended, MRR decreases monotonically. In the case of Tool wear rate the most important factor is discharge current then pulse on time and after that diameter of tool. In the case of over cut the most important factor is discharge current and then diameter of the tool and no effect on pulse on time.
