Experimental Investigation of Surface Roughness by Considering Different Parameters on CNC Turning for EN-8

This experimental workanalysis the influence of cutting conditions on surface roughness of EN-8during machining by CNC turning. Analysis of variance (ANOVA) is employed to investigate the influence of cutting speed, feed rate, and depth of cut and coolant type on surface roughness height Ra. The influence of the interaction of cutting speed, feed rate, depth of cut and coolant type on surface roughness height Ra are analyzed through various graphical representations. Firstly the on EN-8 test is performed on the specimen by Spectroscopy to determine the composition of various constituents present in the EN-8. Then conduct the experiments by varying the parameters of CNC lathe machine like cutting speed from 1000 rpm to 3000 rpm, feed 0.05 mm/rev to 0.2 mm/rev, depth of cut from 0.5 mm to 1.5 mm and coolant type water with additives, dry air and nitrogen are studied in details. Then after experimentations at various combinations according to Taguhi'sdesign of experiments Surface Roughness is measured using Mitutoyo SJ-201 a Roughness measuring instrument. At last results are analyzed using Statistical techniques and parametric optimization is done for minimum surface roughness. From the experimentation, it is concluded that for EN-8 optimum machining condition for Surface Roughness (SR) with cutting speed (2000 rpm), feed rate (0.05 mm/rev), and depth of cut (1 mm) and at nitrogen as coolant.