Optimization of Drilling Parameters for MRR and Surface Roughness Using Response Surface Methodology

Author(s): S. V. Alagarsamy, P. Raveendran, H. Saravanan, J. Sriram

Abstract: In the present study, effect of drilling parameters on metal removal rate and surface finish are measured and are optimized. Design of experiments is used for designing the experiment. Cutting Speed, Feed and Depth of cut are the selected input parameters for drilling process and metal removal rate and surface roughness is output response parameter of Aluminium alloy 7075. For the present investigation the input variables values varies from the 600-1200 rpm for cutting speed, 0.06-0.12 mm/rev for feed and 1.5-4.5 mm for depth of cut. Regression equations are generated from the RSM. Response surface methodology is utilized to develop an effective mathematical model to predict optimum level. Their functional relationship & effect on different parameters is studied. ANOVA is applied to know which input parameter has most significant effect on the metal removal rate and surface roughness. A comparison study is made for tabulated values and experimental values for metal removal rate and surface roughness by using analysis of variance. The model found statistically fit for 95% confidence level.