Nanofinishing of External Cylindrical Surface of C60 Steel Using Rotating Core-Based Magnetorheological Finishing Process

A rotating core-based magnetorheological finishing process has been developed for nanofinishing of external cylindrical surfaces. Shaft made of steel grade C60 is taken as workpiece, which finds its application in manufacturing of various automotive products such as crankshafts, rocker arm shafts, and steering tie rods. The present work involved the parametric studying the developed magnetorheological finishing process. To plan and examine the effect of process parameters, namely, current, tool core’s rotation, workpiece rotation and abrasives concentration on the percentage change in surface roughness, the response surface methodology has been employed. Examination of the experimental data depicted that the large contribution to response variable is made by the current and tool speed, which is followed by the rotational speed of cylindrical workpiece and abrasives concentration. The initial surface roughness value of 320 nm reduced to a final value of 52 nm in finishing time of 90 min with optimized parameters.