Abstract: The selection of adequate manufacturing conditions is one of the most important aspects to take into consideration in the Electrical Discharge Machining (EDM) of hard to cut metals, as these conditions are the ones those have decisive effect on important machining characteristics as: Material Removal Rate (MRR), Electrode Wear Rate (EWR) and the machining accuracy as: Overcut (OC), Taper (T). In this work, a study was carried out on the influence of the factors as: Current (I), Capacitance (C), Pulse on time (Ton) and Pulse off time (Toff) over the listed technological characteristics. The experiments were performed on titanium wrought alloy (VT-20) machined with hollow brass electrode. Accordingly, to obtain the optimal machining conditions techniques like Design of Experiments (DOE) and ANOVA were used. The Experimental results showed that using appropriate machining parameters; the diameter variation between entrances and exit of micro hole can be improved. Considerable amount of re-solidified material and burr were observed at high values of current which leads to secondary discharge and made significant effect on electrode wear. It was also observed that lower range of current and pulse on time gives better topographical condition for micro holes.
 
Key words: Micro EDM, ANOVA, Secondary discharge.

Cite: Gosavi Vaibhav Y. and Phafat Nitin G., "Analysis of the Influence of EDM Parameters in Micro Hole Drilling of Titanium Wrought Alloy," International Journal of Materials Science and Engineering, Vol. 4, No. 1, pp. 34-35, March 2016. doi: 10.17706/ijmse.2016.4.1.34-35