22-09-2014, 04:22 PM
Abstracts: Electro Discharge Machining (EDM) is an emerging technology in the field of machining to fabricate very complex micro products. Wire EDM is a very complex process involving the different process parameters. In the present investigation and optimization of wire EDM has been carried out using Taguchi method. The parameters involved are voltage, capacitance, feed rate and wire speed. MRR is taken as the response criteria. Experimental investigation has been carried out in multi-process EDM machine. Wire electrical discharge machining process is a highly complex, time varying & stochastic process. This is used in the fields of dies, moulds; precision manufacturing and contour cutting etc. any complex shape can be generated with high grade of accuracy and surface finish using CNC EDM. The output of the process is affected by large no of input variables. Hence a suitable selection of input variables for the electrical discharge machining (EDM) process depends heavily on the operator’s technology & experience. EDM is extensively used in machining of conductive materials when precision is of prime importance. Metal removal rate (MRR), surface finish & cutting width are of prime importance. Using Taguchi's parameter design, significant machining parameters affecting the performance measures are identified as pulse peak current, pulse on time. The effect of each control factor on the performance measure is studied individually using the plots of signal to noise ratio. The study demonstrates that the WEDM process parameters can be adjusted so as to achieve better metal removal rate, surface finish, electrode wear rate.