Optimization of Cutting Parameters in Turning Operation of EN24 Steel with Minimum Lubrication

ABSTRACT

This experimental study optimized the cutting parameters (depth of cut, feed rate, spindle speed) in turning EN24 steel (0.4% C) with hardness 40+2 HRC. In this, turning operation were carried out on EN24 steel by carbide P-30 cutting tool with minimum lubrication and the combination of the optimal levels of the parameters was obtained. In order to study the performance characteristics in turning operation, Taguchi method (consisting of the Signal-to-Noise Ratio (S-N Ratio) and Analysis of Variance (ANOVA) employed. As a result of the analysis of variance, the three factors were found to be significant and also showed that feed rate, followed by spindle speed and depth of cut, was the most influencing parameter for modeling surface finish while turning EN24 steel by carbide cutting tool in a cutting condition with minimum lubrication. The graph of Signal-to-Noise Ratio (S-N Ratio) indicated the optimal setting of the cutting parameter which gave the optimum value of surface finish. A model to maximize the surface finish for effective turning operation of EN24 steel was equally developed. The results obtained by this method would be useful to other research works for a similar type of study for further research on cutting forces and tool vibrations.

Keywords: EN24 steel, turning, Surface Roughness, Taguchi Method, ANOVA, S-N Ratio