EFFECT OF LOW-FREQUENCY VIBRATIONS ON MRR, EWR IN POWDER MIXED ELECTRICAL DISCHARGE MACHINING

Abstract

Vibrations incorporated into Electrical Discharge Machining (EDM will
improve chip release from the discharge gap and increase the ability to draw
new dielectric fluid into the gap between the electrode and the workpiece. This
results in a more stable machining process and this solution can have positive
implications in EDM with powders mixed in dielectric fluid (PMEDM). In this
study, the effect of low - frequency vibration (F) on an SKD61 workpiece in
PMEDM with Titanium powder mixed in dielectric fluid was investigated. The
results showed that the vibration incorporated with the workpiece in PMEDM
had a positive effect on machining efficiency. Material removal rate (MRR) is the
largest increase by 141.7%, the electrode wear rate (EWR) is the strongest
reduce by 70.2%.