Study and Experimental Investigation of the Effect of Progressive Feed Rate on Surface Roughness in CNC End Milling Process Using RSM

The objective of this research work is to investigate the influence cutting parameters on average surface roughness (Ra) in an end milling process. Feed rate (f), Spindle speed (s) and Depth cut (d) are considered as significant factors. A case study progressive feed (PF) conventional constant (CF) machining characteristics Aluminum alloy BS L168-T6511 using considered. Taguchi's design experiments (DoE) technique applied for various combinations factors was measured Mitutoyo surftest SJ-301 tester. experimental results Ra analyzed by response methodology (RSM). predicted values developed regression mathematical model compared against were found close agreement. ANOVA further analyze data checking adequacy predict each parameter output Ra. Main effect plots, Interaction 3D Contour plots established. investigation reveals that predominantly affected (PFM) yields better finish than (CFM) milling.