Title: Influence of glycerin-air dielectric medium on near-dry EDM of titanium alloy
Authors: Krishnakant Dhakar; Akshay Dvivedi
Mechanical Engineering Department, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, 462003, India
Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee 247667, India
Abstract: Ti-6Al-4V is one of the most commonly used titanium alloy. The applications involve in the area of aerospace, chemical engineering, biomedical implants, marine industries, etc. The electrical discharge machining (EDM) is an unconventional machining process. It is widely used to produce complex profiles on electrically conductive materials. Near-dry EDM is a process variant of the EDM process. Generally, it uses water-air mixture as a dielectric medium. Near-dry EDM is an environment friendly process. In this investigation near-dry EDM of Ti-6AL-4V was investigated with glycerin-air dielectric medium. The one-factor-at-a-time approach was used for experimentation. The process parameters selected for experimentation were current, duty factor, lift setting, sensitivity setting, flushing pressure, liquid flow rate and gap control. The responses measured were material removal rate (MRR) and surface roughness (SR). The experimental results revealed that glycerin-air dielectric medium produced higher MRR with fine surface finish even at higher current and wear ratio of the process was also less than 1%.
Keywords: near-dry electric discharge machining; dielectric medium; material removal rate; MRR; surface roughness; SR.
Int. J. of Additive and Subtractive Materials Manufacturing, 2017 Vol.1, No.3/4, pp.328 - 337
Submission date: 15 Mar 2017
Date of acceptance: 29 Sep 2017
Available online: 07 Feb 2018