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IDL - International Digital Library Of Technology & Research Volume 1, Issue 5, May 2017

Available at: www.dbpublications.org

International e-Journal For Technology And Research-2017

Parametric Optimization of Tool Wear Rate (Twr) on Die Sinking EDM by Using Taguchi and Anova M. Ramadas 1 , Dr.J.S.Soni2 , Dr.T. Vijaya Babu3 1

Associate Professor , Nishitha College of Engineering and Technology ,Lemoor (V), Hyderabad ,India 2 Professor Bharat Institute of Engineering and Technology , Ibrahimpatnam , Hyderabad ,India 3 Professor , Department of Mechanical Engineering, Vardhaman College of Engineering , Shamshabad , Hyderabad 1

das.7442012@gmail.com, 3 tirividhivijaybabu@gmail.com

Abstract: Electric Discharge Machining (EDM) is a unconventional machining process where intricate and complex shapes can be machined. Only electrically conductive materials can be machined by this process. These materials are being widely used in die and mould making industries, aerospace, aeronautics and nuclear industries. In this work DIN 1.2714 steel is the material used for the machining purpose and Copper is used as an electrode. In this process Taguchi approach is used to create L27 orthogonal matrix. Experiments were conducted with the L27 orthogonal array based on the Taguchi method. Moreover, the signal-to-noise ratios associated with the observed values in the experiments were determined. The purpose of ANOVA to see the individual effect of control factors on MRR and TWR. In the present work, Optimization of TWR on EDM conducted by using Taguchi and ANOVA. Keywords: Die sinking EDM machine, tool wear rate, Taguchi’s method, ANOVA 1. INTRODUCTION Electrical-discharge machining (EDM) is an unconventional, non-contact machining process where metal removal is based on thermo-electric principles. In this process, the material removal mechanism uses IDL - International Digital Library

the electrical energy and turns it into thermal energy through a series of discrete electrical discharges occurring between the electrode and work piece immersed in an insulating dielectric fluid . Electrical Discharge Machining (EDM) is a process of material removal using an accurately controlled electrical discharge (spark) through a small gap (approximately 10 to 50 microns) filled with dielectric fluid between an electrode and a work piece. The hardness of the work piece has no effect on the process. Electrically conductive material is removed by controlled erosion through a series of electric sparks of short duration and high current density between the electrode and the work piece, both the work piece and tool is submerged in a dielectric bath, containing kerosene or distilled water. During this process thousands of sparks per second are generated, and each spark produces a tiny crater in the material along the cutting path by melting and vaporization. The objective of the present work is to find a suitable process parameters to minimize the tool wear rate using DIN 1.2714 as a work piece steel and square copper electrode as a tool and dielectric flushing. The machining parameter selected are discharge current, pulse on time ,pulse off time , voltage , fluid pressure of the tool using Taguchi design approach analyzing the responses of EWR. The Taguchi’s method is used to formulate the 1|P a g e

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