磁気研磨機構に関する力学的考察(機械要素,潤滑,工作,生産管理など)

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Magnetic abrasive finishing is one of the surface finishing methods, in which a workpiece is polished by special abrasives held in a magnetic field. Since these abrasives are not connected mechanically one another but only supported by magnetic force, they can change the position to fit the workpiece surface. Therefore, this process is applicable to curved surfaces or inside of tube, which cannot be finished with conventional processes. However, as regards finishing mechanism, behavior of abrasives during working has not been explained well. In order to clarify it, a new mechanism for this process based on energy principle was proposed and discussed in this paper. Apparatus for plane finishing was made and nonmagnetic stainless steel sheet was polished. Under the assumption that abrasives were arranged between magnetic poles in such a way that cohesive energy became minimum, movement of abrasives in contact with workpiece was explained by means of equilibrium of forces. Normal force, horizontal force and distribution of normal stress in the contact area were measured with specially designed jigs. They were increased with increasing current to the electric coil or the amount of supplied abrasives, due to increase in intensity of magnetic fields or cohesive density of abrasives, respectively. Mean surface roughness was measured and found to be improved from 0.1 μm to 0.04 μm after about 10 minutes working.
一般社団法人日本機械学会の論文
2002-07-25

磁気研磨機構に関する力学的考察(機械要素,潤滑,工作,生産管理など)

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