Tool Wear Analysis During Turning with Single and Dual Supply of LN2

Abstract

In the presented research work, LN₂  supplied directly at rake face and in another localised machining condition, LN₂ supplied at rake and flank face simultaneously. The DoE of performance of experiments was in accordance with Taguchi S/N ratio L₁₈. It was found that flank wear length and crater wear width at LN₂ supply at rake & flank face simultaneously declined by 23-38% and 20-30% respectively as compared to LN₂ supply at rake face only. ANOVA gave the highest effect of contribution in the percentage to LN₂ supply at rake & flank face simultaneously as 76.06% and 77.67%, next in decreasing order followed by speed, feed and depth of cut. SEM images depicted that flank wear length and crater wear width in both machining conditions. Tool wear was low during turning LN₂ supply at rake and flank face. Optimized values of each response was confirmed by repeating the experiments.