This paper investigates the effects and multi objective of optimization of turning process parameters. The process parameters selected for optimization are speed, feed and depth of cut. In this study Al-LM 25 has been selected as the base material which is having a wide variety of application in the cylinder block liners, vehicle drive shafts, bicycle frames automotive pistons etc. An attempt had been made to increase in strength by adding 12% of Fly-ash and 8% of Magnesium to make a metal matrix composite by Steer Casting process the hardness had been increased from 66.04 BHN to 78.14 BHN. The experimental runs are carried out based on L9 Orthogonal Array (OA). Surface Roughness (Ra) and Material Removal Rate (MRR) are taken as process responses. The objective of optimization is to achieve minimum surface roughness and high material removal rate simultaneously, process parameters are optimized based on Taguchi technique coupled with grey relational analysis. Analysis Of Variance (ANOVA) has been carried out to get the contribution of each process parameters on the process responses and final effects of process parameters on material removal rate and surface roughness is plotted and studied.
The Wire EDM process has several machining parameters such as pulse on time, pulse off time, supply voltage, peak current, wire speed, wire feed, machining time, and rate of flushing, material and size of the wire, dielectric type, viscosity and other flow characteristics. Several researchers have made an attempt to improve the performance characteristics namely surface roughness, cutting speed, dimensional accuracy, dimensional deviation and material removal rate. Selection of optimal machining parameters plays an important role. Improperly selected parameters may result in serious problems like shot circuit and wire breakage. Hence there is a huge demand for research studies to find out the optimal machining parameters of WEDM. In this paper; a detailed review on effect of machining parameters on performance characteristics of Wire EDM process is presented and effect of optimization of process parameters is discussed.
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