Measurement and Simulation of magnetic field strenght in Nano Magnetic Abrasive Finishing Process

Magnetic abrasive finishing (MAF) can be classified as non-traditional super finishing method for finishing surfaces with different shapes and working materials like flat plates, shafts, bearings parts, screws, tubes and many other mechanical parts that need a good surface finishing properties. MAF is effective in polishing, cleaning, deburring and burnishing metal parts. The most important parameter affecting the results of this method such as surface roughness is the magnetic force. The magnetic force is obtained from a permanent Magnet or a DC magnet.
In this article, Study of the magnetic field strength, magnetic flux density and magnetic force in different states is performed using simulation with a finite element method software (Maxwell). The shapes of magnets, various sizes and material of fixture are studied. The magnetic properties of the material of the work piece are simulated. To verify the simulation results, the situation is also measured by a Gauss meter. The intensity of the magnetic field required for the micro chipping obtained for the different geometric shapes and various materials of work piece in Magnetic Abrasive Finishing process. Results show Increasing the distance from the magnet surface, results in a decrease in magnetic flux density and significance of the edge phenomenon effect. The effect of work piece material, work piece fixture material and the interaction of them were significant on magnetic flux density.
To concentrate magnetic abrasive powder in the polishing process of non-ferromagnetic parts, the ferromagnetic fixture for these parts can be provided.