Investigation of the application of a magnetic abrasive finishing process using an alternating magnetic field for finishing micro-grooves

A magnetic abrasive finishing process using an alternating magnetic field is proposed for the finishing of complex surfaces. In an alternating field, the periodic changes in current will cause the magnetic cluster used as a magnetic brush to fluctuate, which will not only continuously replace the abrasive particles in contact with the workpiece, but also periodically adjust the shape of the magnetic cluster to better fit the surface of the workpiece. In this paper, the influence of a combination of alternating and static magnetic fields on the magnetic field in the finishing area is analyzed. The feasibility of this process for finishing micro-grooves is investigated. Simulations and experimental measurements show that the combination of alternating and static magnetic fields can retain the advantages of the alternating field while increasing the magnetic flux density in the finishing area. The experimental results show that the process is feasible for finishing micro-grooves, with an excellent deburring effect on the groove edges.