Abstract
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.
Highlights
With the development of new technologies in areas such as optics, molding, semiconductors, and medical equipment, a higher surface finish is required on many components
Magnetic abrasive finishing (MAF) is a surface finishing process that uses as a polishing tool a flexible magnetic brush formed as a cluster of fine magnetic particles mixed with abrasive particles1–5 and has potential for finishing complex surfaces
We proposed a MAF process that uses an alternating magnetic field
Summary
With the development of new technologies in areas such as optics, molding, semiconductors, and medical equipment, a higher surface finish is required on many components. Yin and Shinmura described a method for polishing 3D micro-curved surfaces They proposed a vibration-assisted MAF process in which finishing was enhanced by the application of different modes of vibration to the workpiece. Guo et al. investigated the feasibility of a vibration-assisted magnetic abrasive polishing (VAMAP) process for polishing V-shaped grooves and Fresnel optical elements They showed that VAMAP was able to improve the surface quality by using a magnetic abrasive. Wang et al. studied the feasibility of using a magnetic compound fluid slurry to finish linear V-shaped grooves They showed that the method could effectively improve the surface quality of the grooves. In a static magnetic field, it is difficult to restore the shape of the brush, which hinders the finishing of complex surfaces To overcome this problem, we proposed a MAF process that uses an alternating magnetic field. The surface roughness of the bottom of the grooves is evaluated, and the topography of the groove edges is examined
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