(Solved): In a wire EDM (shown in the figure below) operation performed on 10cm-thick steel plate (Tm=15 ...

In a wire EDM (shown in the figure below) operation performed on $10\mathrm{cm}$-thick steel plate $\left(T_m=1550^{\circ }\mathrm{C}\right)$, a tungsten wire electrode (diameter $=0.1\mathrm{mm}$ ) is used. Using a discharge current $=12.5\mathrm{amps}$, the overeut will be $0.01\mathrm{mm}$. (a) what is the feed rate that can be used in the operation? (b) If the melting temperature of electrode metal (Tungsten) $=3300^{\circ }\mathrm{C}$, what is the electrode wear rate in $(\mathrm{mm}3/\min )$ (c) What is the wear ratio? (d) In this cut, the surface finish on the cut edge is found poor. What changes in discharge current and frequency of discharges should be made to improve the finish?