INVESTIGATION OF INFLUENCE OF MILLING PARAMETERS ON SURFACE ROUGHNESS AND FLATNESS

This paper deals with the effect of three selective parameters viz. cutting speed, feed and depth of cut on the surface roughness of Aluminium 1050 during milling operation. The main objective of this work is to investigate the influence of the above mentioned parameters on the surface roughness and flatness to obtain the optimum surface texture using Response Surface Methodology and to recommend the best parameters that contribute to obtain the optimum surface roughness value. The values of said three parameters taken for the study are: cutting speed range - 500 to 1500 rpm, feed range - 50 to 70 mm/rev and depth of cut range - 0.5 to 1.5mm, and given as input to the Mini Tab software. As a result 15 number of design of experiments with various combinations of the three parameters under consideration have been generated. Experiments have been conducted in the run order on CNC Milling Machine by using manual coding method, and the surface roughness has been tested using TR-200 surface roughness tester, and the flatness has been tested by using Coordinate Measuring Machine (CMM).The obtained surface roughness and flatness values are analyzed through graphs generated by using Response Surface Methodology (RSM) of Minitab Software. In addition an empirical relation between cutting parameters, surface roughness and Flatness is also derived.