Experimental Analysis on Surface Roughness of En-24 Hardened Steel

In this thesis, it is about the machining of the EN-24 hardened steel that involves turning operation of the EN-24 with the help of coated carbide insert of ISO designation CNMG 120408. Analysis of the surface roughness is done experimentally with specific input values of feed, depth of cut and speed and gradually the optimal condition is found out. A relation between the inputs and the output is determined and thereafter, the analysis is done how the inputs affected the output. First using the full factorial composite design a layout of the experiment is made after which it is conducted. The profilometer is used to measure the surface roughness. Here the L27 Taguchi method is used for the determination of the change in surface roughness with respect to the speed, feed and depth of cut. This can be analysed with help of the contour plots, 3-D surface plots and different graphs produced by the MINTAB 16 software. We can easily determine the effects by visualizing the main effect plots and interaction plots also. With the help of ANOVA (Analysis of Variance), the most effective or the optimal parameters for the output are determined. The regression equations are also obtained. All the parameters are found to be significant in determination of the surface roughness and possible conclusions are made at the end