Experimental Investigation on the Effect of Process Parameters in Die-sinking EDM of EN8 Steel
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Abstract
The objective of the present work is to investigate the effects of the various DEDM process
parameters on the machining quality and obtain the optimal sets of process parameters so that the
quality of machined parts can be optimized. Experiments are conducted on the pieces varying
parameters. The work piece and electrode materials used for machining are EN 8 steel and copper
tungsten. The process parameters considered are Pulse Time on, Pulse Time off, and peak current.
The range of values varied are Time on – 100μsec, 200 μsec and 500 μsec, Time off – 200 μsec, 500
μsec, 900 μsec, Input power –7amp, 15amp, 22amp. The optimization is done by using TAGUCHI
technique by considering L9 orthogonal array.Optimization is done using Minitab 19 software
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