The influence of machining parameters on Wire Electrical Discharge Machining of Nimonic Alloy 75

ABSTRACT:
Wire-cut Electric Discharge Machining (WEDM) is an unconventional machining process that uses a wire as a
tool to remove material. This study focuses on the optimization of Material Removal Rate (MRR), Kerf Width
(W), and Kerf Taper Angle (θ) while machining Nimonic Alloy 75 using a Molybdenum wire with a diameter of
0.18 mm on a wire-cut EDM machine. During the machining process, deionized water was utilized to cool the
workpiece and flush away small particles from the gap. The outcomes Material Removal Rate (MRR), Kerf
Width (W), and Kerf Taper Angle (θ)were optimized using the Taguchi L9 orthogonal array design approach.
The experiments were conducted by varying Peak Current (IP), Pulse on Time (Ton), Pulse off Time (Toff), and
Gap Voltage (V). An Analysis of Variance (ANOVA) was employed to determine which parameters most
significantly influenced the Material Removal Rate, Kerf Width, and Kerf Taper Angle.