Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Article Title: Effects Of Cutting Speed And Depth Of Cut On Surface Roughness (Ra) OF AISI 1027 Steel In Turning Operation
by BABA, Muhammad T. & TUMBA, J.

Abstract:
The study was carried out to evaluate the effects of cutting speed and depth of cut on surface roughness (Ra) of AISI 1027 steel in turning operation. The Experimental samples of AISI 1027 Steel were turned on E3N-01 lathe machine using machining parameters of 40mpm, 50mpm and 60mpm for cutting speed (Cs), 0.5mm, 1.0mm and 1.5mm for depth of cut (Dc) and a feed rate (Fr) of 0.120mm/rev. The surface roughness of the turned samples were afterwards determined with the aid of Scanning Electron Microscope (SEM) and the results which range between 1.0167?m and 11.9843?m.The maximum Ra values of 6.4443?m,11.6069?m and 7.4536?m were obtained a cutting speed of 40mpm and the minimum Ra values of 1.2456?m, 3.3303?m and 2.5806?m were obtained at cutting speed of 60mpm. Similarly, the maximum Ra values of 7.0532?m, 5.8058?m and 4.1229?m were obtained at the mid value of Dc (1.0mm) and the minimum Ra values of 6.4443?m, 1.7731?m and 1.2456?m were obtained at 05mm. The results were subjected to statistical analysis using analysis of variance (ANOVA) as a statistical tool at 95% confidence interval (p=0.05). The results showed that the significant value (p value) for cutting speed is 0.036 which is less than 0.05 (p=0.036<0.05). Similarly, the p value for depth of cuts 0.403 which is greater than the p value of 0.05. This implies that the surface roughness increases with increase in cutting speed statistically and vice versa. Similarly, the p value for depth of cut is 0.403 which are greater than the p value of 0.05. This, therefore, depict insignificant changes in surface roughness with increase in the values of this parameter (p>0.05).

Keywords: Cutting Speed, Depth Of Cut, Mild Steel, Surface Roughness And Turning

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