RSM based Study of Cutting Temperature During Hard Turning with Multilayer Coated Carbide Insert

Abstract

In the present study, an attempt has been made to investigate the effect of cutting parameters (cutting speed, feed rate and depth of cut) on the cutting temperature in hard turning of AISI 52100 alloy steel using multilayer coated carbide (TiN/TiCN/Al2O3/TiN) insert. Central Composite Design (CCD) was used to perform machining experiments to collect data. Several diagnostic tests were performed to check the validity of assumptions. Significance of the cutting parameters was determined using statistical analysis of variance (ANOVA). The model equation to predict the cutting temperature is also proposed. Response surface methodology (RSM) was employed to determine optimal values of cutting parameters. The ANOVA results indicated that all the three cutting parameters have significant effect on the cutting temperature. Results also revealed that within the range investigated, the cutting temperature is highly sensitive to cutting speed and feed rate. Optimized model indicated 100% desirability level for economy in the conventional turning process. Further, the predicted values of the cutting temperature obtained from regression equation were found to be in close agreement with those of experimental values.