Researching for the unbounded magnetic abrasive application in magnetic abrasive finishing

A new type of magnetic abrasive is introduced in this paper, which is named as unbounded magnetic abrasives. The magnetic abrasives hold easy making, low cost and good working characteristics, so it possesses a better applying value. The unbounded magnetic abrasive is a mechanical mixture of SiC abrasive and ferromagnetic particles with lubricant. In order to gain the best machining property of the magnetic abrasive, a lot of experiments have been done, especially to test the working quality and working efficiency of the magnetic abrasive, for which, iron grit and steel grit were used as ferromagnetic particles, each of them being mixed with 5.5μm SiC abrasive. In the meantime, experiments also have been done to test the finishing characteristics of the magnetic abrasive used steel grit only and the unbounded magnetic abrasive without added lubricant. The experiment results indicate that when mixed with SiC abrasive by lubricant steel grit used as ferromagnetic particles is more suitable for MAF then iron grit, and the magnetic abrasive of steel grit only is also have good machining property in working workpiece with lower hardness. It overcomes the problem of high cost, difficult making of the magnetic abrasive. All of this will be important significance for MAF to realize industrialization