The effect of machining parameters of magnetic abrasive finishing on free surface of aluminum alloy

In the process of polishing with magnetic abrasive particles, several parameters affect the smoothness of the final surface of the part. These parameters include properties related to machining conditions, workpiece properties, or abrasive powder properties. The present paper deals with the effect of the kinetic parameters of the MAF process on the convex and concave surface of aluminum alloy experimentally. These parameters include rotational velocity, linear velocity, abrasive brush distance to the workpiece (gap), magnetic flux density, and angle of curvature. For this purpose, a spherical head magnet was used and the powder used was prepared by mechanical alloying method. Also, the two-way zero-degree raster movement strategy is used for the tool movement path. The experiment was designed using miniatub software. According to the results of analysis of variance, it was found that all the main factors or their interaction are effective. Also, the roughness changes on the convex surface are more than the concave surface. On the convex surface, the roughness changes with increasing curvature angle. On the convex surface of the workpiece, with increasing magnetic flux density, there is an increase in surface roughness changes, while on the concave surface, passing the magnetic flux density of 0.53 Tesla, the progression of roughness changes occurs. The effect of velocity on the convex and concave surfaces of the workpiece is the same, and with increasing rotational speed from 125 to 2000 (rpm), the roughness changes of the concave surface of the workpiece increase by 57%.