Review on Recent Development in Environmental-friendly EDM Techniques

Abstract

The electrical discharge machining (EDM) is unitary of the widely used unconventional machining because of its ability to cut very hard material engendering high dimensional accuracy as well. In thermo-electric process, control sparks generation between electrodes causes material removal; however, application of hydrocarbon oil based dielectric is an issuance of environmental disruption. To rectify this problem, replacement of dielectric is main concerns in EDM research. This paper highlights Dry-EDM, Near-Dry EDM and EDM in water, which is conceived as an environment amiable alteration in the oil EDM process. The work gives a thorough review of Dry, near-dry EDM and EDM in water as a process, where the target is to endeavor dielectric fluids that can be substituted bypassing hydrocarbon oil. It is perceived that water and gas based dielectrics could take over oil-based fluids in die sink applications. Novel technological advances in dry EDM machining processes, which deliberate the relatively advanced stage of a technology in to the area of academic and industrial research is briefly reviewed. An outline of the prospective trend of reviewing is intimate in the last fragment.

Sustainable developments in near-dry electrical discharge machining process using sunflower oil-mist dielectric fluid

“…Several vegetable oils' dielectric breakdown voltage and thermal characteristics were compared to mineral oils' (Kellens et al 2011). It was also strongly recommended that pressurized air and low moisture content emissions from vegetable oils has employed in electrical equipment (Kumar Singh and Singh 2015). In 2005, it was reported that due to their adequate breakdown voltage and thermal conductivity properties, castor, soya bean, and cocoanut oils would be employed as dielectrics to provide superior cooling and insulation (Amanullah et al 2005).…”