Effect of CNC milling machining parameters on depth of pocket

Present work includes understanding the effects of milling parameters such as spindle speed, feed rate and depth of cut on the depth of pocket of finished pockets. The experimental plan was based on Taguchi's technique including L₉ orthogonal array with three factors and three levels for each variable and studying the contribution of each factor on depth of pocket. The experiments were conducted on EN 31 steel material on CNC vertical milling machine using carbide tool. The analysis of variance technique is employed to study the significance of each machining parameter on the depth of pocket. The results indicated that spindle speed with the contribution of 41.52% is the most important parameter affecting the depth of pocket. The optimal combination of the parameters for obtaining minimum deviation in depth of pocket is A₁B₂C₃, i.e. at cutting speed (A) of 1000 rpm, feed rate (B) of 1500 mm/min and depth of cut (C) of 0.15 mm.