Improving Electrical Discharge Machined Surfaces Using Magnetic Abrasive Finishing

Study the characteristics of magnetic finishing with gel abrasive

“…Previous studies indicated that finishing process could not proceed with if the magnetic field was not applied in the machining or the abrasive were rolling in MAF [2,3]. However, a gel abrasive without use of the magnetic field verified that the rolling abrasive had the abrasion ability in FGA, although the finishing forces were small.…”

“…Chang et al [2] used an unbonded magnetic abrasive (UMA) to polish the cylindrical rod of steel, subsequently decreasing surface roughness from 0.25 to 0.06 mm Ra within a few minutes. Additionally, they also applied UMA to grind the EDM surface of the cylindrical rod, demonstrating the feasibility of easily removing the recasting layers and cracks [3]. Yin and Shinmura [4] developed a vertical vibration-assisted MAF, in which the micro burr of the magnesium alloy could be withdrawn in a short time and the material removal rate of this alloy exceeded that of the brass and the stainless steel.…”

“…MAF is an excellent means of polishing, deburring and removing recasting layers from many parts [1][2][3][4][5]. Kim and Choi [1] utilized two magnetic abrasive tools, i.e.…”

“…Magnetic abrasives of MAF can be divided into two parts. The first is UMA [2,3,6,7], in which this magnetic abrasive is applied to the stirring method in order to mix the ferromagnetic particles and the abrasives. Therefore, the abrasive is not physically bonded to the ferromagnetic material.…”

Machining characteristics of magnetic force-assisted EDM

“…Several investigations have focused on the applications of using magnetic force to promote the manufacturing technique in recent decade [1][2][3][4][5][6][7][8][9][10][11]. However, these investigations only focused on the magnetic abrasive developments and using the magnetic abrasive to finish either inner or outer of the machined surfaces.…”