Empirical model for Surface Roughness in hard turning based on Analysis of Machining Parameters and Hardness values of various Engineering Materials

摘要

This paper investigates the machining parameters affecting the roughness of surfaces produced in hard turning process for three different materials like EN8 steel, Aluminium alloy and Copper alloy under dry conditions. Three parameters were selected for study: cutting speed, feed and material hardness. For the three materials like Aluminium alloy, copper alloy and EN8 steel impact of increase in feeds versus decrease in cutting speeds with constant depth of cut adopted to analyze the influence of these parameters on the generated surface roughness. Regression analysis using MINITAB software for all the three material turning operation data mining was used to create model for the prediction of the average surface roughness (Ra) in terms of cutting speed, feed and material hardness and 67.2% of R2 and 47.52% of R2(adj) were obtained.