Experimental Investigation of Factors Affecting Milling Operation

Abstract

CNC milling is an ideal adaption of the conventional milling process which uses an end mill cutter for the machining operation. Plain milling is one of the essential machining operations and it is used for planning the top surface of component to achieve the high accuracy with good surface finish. In this work, plain milling operation is performed on CNC milling machine. The parallel shank end milling cutter having 14 mm diameter, M2 grade is used for the operation. Mild Steel containing 20% Carbon is used as work piece. The dimension of work piece is taken as 55×50×16 mm. Full factorial experimentation is carried out for conducting pilot experiments to study the effects of machining parameters such as spindle speed, feed and depth of cut on surface roughness and material removal rate in minimum machining time. After experimentation it is observed that the effect of surface roughness is increased when material removal rate is high. Both surface roughness and material removal rate is inversely proportional to each other.