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Analysis of Rotary Electrical Discharge Machining Characteristics in Reversal Magnetic Field for Copper-En8 Steel System

By K.D. Chattopadhyay, P.S. Satsangi, S. Verma and P.C. Sharma

Abstract

The material removal rate (MRR), along with the\ud electrode wear rate (EWR), plays an important role in\ud analysing machine output during electrical discharge\ud machining. This work focuses on the improvement of\ud machine output by introducing an induced magnetic field\ud on the workpiece during rotary electrical discharge machining (REDM) of EN-8 steel with a rotary copper\ud electrode. The workpiece was placed inside the induced\ud magnetic field, wherein polarity of the magnetic field gets\ud reversed periodically. Using Taguchi’s recommended design\ud of experiments, we initially conducted experiments\ud with eight input parameters at different levels . Significant\ud parameters were identified with the help of the signal-tonoise\ud ratio and ANOVA. Finally, another set of experiments\ud was conducted for analysis of the process and development\ud of empirical expressions for MRR and EWR. Experimental\ud results established that rotary electrical discharge machining with a polarity reversal magnetic field delivers better machining output than machining in a non-magnetic field.Thus, this work benefits the EDM process by reducing the machining costs and by producing better geometrical\ud trueness on workpieces, as MRR increased and EWR\ud decreased

Topics: Mechanical
Publisher: Springer
Year: 2007
OAI identifier: oai:csioir.csio.res.in:76
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