Optimisation of Current and Pulse Duration in Electric Discharge Drilling of D2 Steel Using Graphite Electrode

  • D. Deepak Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, India
  • Patil Shrinivas Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, India
  • Ganti Hemant Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, India
  • Ralisa Iasy Mechanical Engineering Department, Ecole Polytechnique, Federal De Lausanne 1015 Lausanne, Switzerland
Keywords: Electric discharge drilling, graphite electrode, globules, material removal rate, surface roughness

Abstract

Electric discharge machining (EDM) is one of the viable techniques for machining of D2 steel, in which the material removal occurs by spark erosion. The poor selection of EDM parameters affect the machining quality and productivity. Considering this, the present work investigates the effect of current, charging and discharging time on the material removal rate (MRR) and the surface roughness (Ra) while machining of D2 steel using graphite electrode. The results were analysed using statistical methods to identify the effect of control parameters and to optimise the settings. The study shows that MRR and Ra was significantly influenced by current. At optimum settings, the MRR and the Ra obtained was 38.16 mg/min and 3.39 µm respectively. Morphological analysis of the machined surface show that the size of the globules formed decreased with increase in current.

Published
2018-12-24
How to Cite
Deepak, D., Shrinivas, P., Hemant, G., & Iasy, R. (2018). Optimisation of Current and Pulse Duration in Electric Discharge Drilling of D2 Steel Using Graphite Electrode. International Journal of Automotive and Mechanical Engineering, 15(4), 5914-5926. https://doi.org/10.15282/ijame.15.4.2018.14.0451