Abstract
This paper presents the experimental investigation of magnetic field-assisted near-dry electrical discharge machining (EDM) process. Experiments were conducted by varying pulse on time and discharge current. Material removal rate, surface integrity, and tool wear rate were taken as the performance measures. Results of magnetic field-assisted near-dry EDM are compared with near-dry and wet EDM. Magnetic field-assisted near-dry EDM process produces MRR equivalent to that of wet EDM and 73% compared to that of near-dry EDM process. Better surface finish and less debris reattachment are observed compared to that of wet EDM and near-dry EDM process. Among the three process variants, magnetic field-assisted near-dry EDM possess higher tool wear rate. Scanning electron microscopy images of the machined surfaces obtained through magnetic field-assisted near-dry EDM is found to have lesser debris deposition and 9% surface finish enhancement when compared with other EDM processes.
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