*Research Scholar, Karpagam University, Coimbatore, India
**Professor, Department of Mechanical Engineering, CMS College of Engineering, Namakkal, India
***Professor, Department of Mechanical Engineering, MAM School of Engineering, Tiruchirrappalli, India
Online published on 9 December, 2016.
In this project experimental investigation and analysis of process parameters of EDM process is carried on using Response Surface Methodology. The output process parameters are measured in terms of Machining time and surface roughness. Optimization of EDM process is carried out using OHNS (Oil hardened Non-shrinking Steel) material. Copper is taken as the electrode for machining. Diesel is used as dielectric medium. Experiment is done by varying the gap between the material and electrode, peak voltage and spark timing and other input parameters. The various input parameters considered are current, pulse ON, pulse OFF and tool lift. A set of 27 readings are taken by varying the process parameters. The design of elements considered in response surface method is Box-Behnken Design (BBD). Analysis and optimization is carried out under this design in RSM. This leads to a set of optimized values that indicate a certain parametric factors produce a good surface finish. The main objective is to investigate the surface finish of the drilled holes in the work piece with reference to the machining time and other process variables.
OHNS, RSM, Pulse ON, EDM
