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By Sending Magnetic Fields, Create the Flexible Magnetic Abrasive Finishing Process

Author(s): Scott Gomez

 One of the unconventional finishing methods, Magnetic Abrasive Finishing (MAF), delivers a high degree of surface quality and is essentially managed by magnetic field. In MAF, the workpiece is maintained between the N and S poles of a magnet. The magnetic abrasive particles are dispersed across the working space between the workpiece and the magnet. Because of the influence of the magnetic field in the working gap, a Magnetic Abrasive Flexible Brush (MAFB) is created and functions as a multipoint cutting tool. In order to determine the impact of the process parameters on the surface quality generated, this research investigates theoretically the planar MAF process. With the use of a finite element model, the magnetic field is simulated. The surface of thin sheets will become abrasive due to the persistent motion of magnetic abrasive particles under the magnetic field. Copper sheets that were 1 mm thick were used for the experiments. Electric current (0.25, 0.5, and 0.75A), coil-turning speed (measured as the speed of magnetic abrasive particle movement) (20, 30, and 40 mm/s), and process duration are among the experimental characteristics (1, 2, and 3 hours). The studies were carried out on free-form and L-shaped sheets. The outcomes indicate that it is simple to concurrently produce various surface roughness patterns in various directions when applying a transmission magnetic field in the MAF (TMAF). While the surface roughness of the L-shaped object is about 0.9 m in one portion of the object where the electric current is 0.25A, it is approximately 0.55 m in the other section where the electric current is 0.75A. In the meanwhile, TMAF enables the finishing of a free-form surface without the use of specific fittings. Additionally, there is an immediate correlation between the change in surface roughness, the electric current, and the processing time. 

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