Optimizing process parameters in edm using low frequency vibration for material removal rate and surface roughness

Vibration attached to workpiece in EDM (Electrical Discharge Machining) makes material removal rate (MRR) and surface roughness (SR) to be improved significantly. However, research results in this field are not so much. In this work, authors studied effect of low frequency vibration attached to workpiece SKD61 to efficiency in EDM. The effect of process parameters including pulse current (I), pulse-on time (Ton), pulse-off time (Toff) and vibration frequency (F) on MRR and surface roughness was investigated. The optimized parameter in EDM process using TOPSIS based multi objectives problem were performed. The experimental results have shown that the process performance accuracy has been enhanced to 86.6% through the Ci in low frequecy vibration assisted EDM process. This surface morphology of the machined specimen could also be improved under optimal process parameters.