Analyzing Workpiece Vibration Effects on Material Removal, Tool Wear Rate, and Surface Roughness in EDM of AISI H13 Die Steel
摘要
Electrical discharge machining (EDM) is a unique, noncontact type machining process that depends on electrical discharges to remove material from a workpiece that is conductive in nature. This is accomplished by delivering current to the workpiece by using a conductive tool electrodes submerged in dielectric fluid, resulting in workpiece material to melt and vaporize. Vibration-assisted EDM has proven to be an efficient method as vibrations enhance debris flushing from the spark gap. This research aims to utilize low-frequency vibration on an AISI H13 die steel workpiece during EDM machining. Vibration has been applied to the workpiece base, expelling debris from the sparking gap through the reciprocating movement of the tool along the Z-axis. The values of Peak Current has been taken as 5 A, 10 A and 15 A to evaluate their impact on material removal rate (MRR), surface roughness (SR), and tool wear rate (TWR) for AISI H13 die steel. Results demonstrate that applying low-frequency vibration during the EDM process improves MRR, TWR, SR.