Multi-Objective Optimization of Pulse Parameters in EDM for Improved Machining Performance
Keywords:
EDM, pulse-on time, pulse-off time, MRR, surface roughness, Taguchi, ANOVA, optimizationAbstract
Electrical Discharge Machining (EDM) is an advanced non-traditional machining process used for machining hard and electrically conductive materials. The machining performance mainly depends on process parameters such as peak current, pulse-on time, pulse-off time, voltage, duty cycle, electrode material, dielectric flushing, and polarity. These parameters significantly influence Material Removal Rate (MRR), Tool Wear Rate (TWR), and Surface Roughness (Ra). This paper presents a complete experimental and statistical investigation of pulse parameters in die-sinking EDM. Peak current, pulse-on time, and pulse-off time were varied using a Taguchi L9 orthogonal array to study their effects on material removal rate (MRR) and surface roughness (Ra). ANOVA, response plots, and literature-supported discussion are used to determine the optimum setting for balanced machining performance suitable for industrial die and mould applications.
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