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Table 6

Cost estimation in electrical discharge machining of Al-SiC MMC.

Specific basic variables In minutes Costs In Indian rupees
Workpiece clamping and positioning time, Tclamp 5 Cost of each electrode, Celcd Rs.15
Electrode positioning and zeroing time, Tp 1 Cost of machine working per minute, Cmach/min Rs.8.33
Electrode drawing out time, Tedr 1 Cost of machine operator per minute, Cop/min Rs.5.83
Single hole drilling time at optimum machining conditions, Td 11.5 Total machining cost per component, Ctot {(Celcd) + (Ttot*Cmach/min) + [(Tclamp + Tedr)*1.2*Cop/min]} Rs. 211.08
Total machining time per component, Ttot (Tclamp + Tp + Tedr + Td) 18.5

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