Optimum Control Parameters During Machining of LM13 Aluminum Alloy Under Dry Electrical Discharge Machining (EDM) With A Modified Tool Design

  • Pragadish NAGARAJAN Professor Department of Mechanical Engineering S.A. Engineering College
  • Pradeep Kumar MURUGESAN College of Engineering, Guindy Anna University, Chennai - 600025
  • Elango NATARAJAN UCSI University, Kuala Lumpur, Malaysia
Keywords: EDM, dry EDM, ANOVA, optimization

Abstract

Dry Electrical Discharge Machining (EDM) is considered as a green manufacturing process in which the liquid dielectric medium is replaced by a high velocity gas, which results improved process stability. A special tool design is adopted to find the optimum control parameters during machining of LM13 Aluminum alloy under dry EDM mode. The drilled and slotted cylindrical copper rod is used as a tool. Discharge current (I), voltage (V), pressure (P) and pulse on time (TON) are considered as varying input process parameters and duty factor and tool rotational speed are chosen at the fixed level. Taguchi L27 orthogonal array is used to design the experiment and the experiments are conducted accordingly. The experimental results are analyzed using Grey Relational Analysis to find the optimal combination of the process parameters. Also, ANOVA test is conducted to ensure the conformity of the simulation results. Pulse on time is found as the most significant parameter which is followed by voltage. Furthermore, the parameters with the highest relational grade (4 A, 200 μs, 60 V and 1.5 kPa) are used in experiment to validate the simulation results. The simulation and experimental results have a good agreement with less than 0.5 % error.

Author Biographies

Pragadish NAGARAJAN, Professor Department of Mechanical Engineering S.A. Engineering College

Professor & Head

Department of Mechanical Engineering

Pradeep Kumar MURUGESAN, College of Engineering, Guindy Anna University, Chennai - 600025

Associate Professor,

Central Workshop Division,

Departmnet of Mechanical Engineering

 

Elango NATARAJAN, UCSI University, Kuala Lumpur, Malaysia

Assistant Professor,

Faculty of Engineering

Published
2019-06-27
Section
METALS, ALLOYS, COATINGS