The role of various dielectrics used in EDM process and their environmental, health, and safety issues

Abstract

Electrical discharge machining (EDM) is one of the well-known newer machining processes which are used to machine ceramics, alloys, composites, and hard metals. Besides being a process with lower material removal rate (MRR), it also releases toxic vapors & fumes, and aerosols due to the thermal decomposition of the dielectrics. Moreover, disposal of these toxic and non-biodegradable dielectric wastes also poses a major challenge to the environment. This article discusses the issue of noxious fumes that are released during machining, as well as the use of alternative dielectric mediums that can be utilized in place of traditional EDM oils.