Development and Investigation of Hybrid Electric Discharge Machining Electrode Process

Hybrid Electric Discharge Machining Electrode (HEDME) process is developed by comprising the features of Electric Discharge Machining (EDM) and traditional grinding which occurs alternatively in place of their simultaneous effect as Electric Discharge Grinding (EDG) process. This paper reports the experimental study of HEDME during machining of High Carbon Alloy Steel for material removal rate (MRR), tool wear (TW) and surface roughness (SR). The experiments were carried out on an indigenously developed HEDME attachment on Sparkonix EDM. The effects of main machining parameters such as type of tool, current and machining time have been studied. The effect of the machining on the workpiece surface machined by HEDME has been optimized using Taguchi L-9 orthogonal array and results are reported. Experimental study shows that the TW is found to be the least with third design of the electrode and it decrease with the decreasing value of current, also surface finish increases with decrease in current. Moreover, the third design of electrode gives the lowest SR and highest MRR. (c) 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of 7th International Conference of Materials Processing and Characterization.