Effects of Cutting Parameters on Cutting Force, Surface Roughness and MRR in Hard Turning of AISI 4140 Alloy Steel: Effects of Cutting Parameters on Cutting Force, Surface Roughness, and MRR in Hard Turning of AISI 4140 Alloy Steel: A Taguchi Method Approach

Abstract

The goal of this research paper is to determine the effects of cutting parameters such as cutting speed, feed rate and depth of cut on the output responses such as cutting force, surface roughness and Material Removal Rate (MRR) in hard turning of AISI 4140 alloy steel. Taguchi method (L9 orthogonal array with 3 levels and 3 factors) was used for the experiments and analysis of variance (ANOVA) was performed to identify most significant factor. The results showed that the depth of cut (most significant factor) contributed 57.12%, feed rate (second most significant factor) contributed 41.47%, and cutting speed (least significant factor) contributed 0.09% for cutting force. The contribution of feed rate was 96.99%, whereas cutting speed and depth of cut contributed only 1.79% and 0.31%, respectively, for surface roughness. The contribution of depth of cut and feed rate was 38.51% and 53.32%, respectively, whereas the cutting speed contributed only 5.54% for material removal rate.