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Research Article

JCR. 2020; 7(19): 6192-6204


STATE OF THE ART IN GREEN DIELECTRIC FLUID FOR SUSTAINABLE ELECTRICAL DISCHARGE MACHINING

K. Mangapathi Rao, D. Vinay Kumar,B. Singaravel.

Abstract
Electrical Discharge Machining (EDM) is widely used unconventional method which employ
hydrocarbon oil based dielectric fluids for ionization, plasma generation, coolant in discharge gap and flushing
of debris in the machining zone. These dielectrics create harmful solid, liquid and gaseous bi-products that are
environment-friendly. A corrective measure is required to enhance sustainability of EDM process directing to
have a cleaner and greener environment in manufacturing. Recently, the use of vegetable oil based dielectric
fluid is used in EDM process to address the above issues and lead to the minimization of environmental effect
and operatorís health. The objective of this review work is to identify the dielectric properties of different
vegetable oils and present machining outcomes to enhance sustainable methodology in manufacturing field. The
result from the literature reveals that few vegetable oils such as sun flower, canola and jatropha are successfully
used as dielectric fluid. Hence, it is understood that vegetable oil based dielectric fluids are having similar
dielectric properties and erosion mechanism. Vegetable oils are biodegradable and exhibit low toxicity as
compared to conventional one. Further research is required to use vegetable oil as dielectric and its importance
in machining

Key words: EDM; Dielectric fluid; Vegetable oil; Dielectric Properties; machining performance



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