“Optimization of machining parameters for minimum surface roughness in end milling”

Abstract

This paper focuses on determining optimized parameters for minimum surface roughness in CNC end milling. Design of experiments based on response surface methodology with three independent factors (cutting speed, feed rate and depth of cut) and one category factor (nose radius), five level central composite rotatable designs has been used to develop relationships for predicting surface roughness. Model adequacy tests were conducted using ANOVA table and the effects of various parameters were investigated and presented in the form of contour plots and 3D surface graphs. Numerical optimization was carried out considering all the input parameters within range so as to minimize the surface roughness.