Abstract: In order to study the influences of magnetoelastic abrasive particles on the tool position during tool passivation and the tool rotation direction on the passivation effect under the same position,a magnetic field model was established based on the double-disk magnetic passivation mechanism and experimentally verified. Firstly,the simulation models for different positions of the tool in the magnetic field were established. Using COMSOL software,the changes in magnetic flux density in the magnetic field when the tool was positioned at distances of 2,4,6,8,and 10 mm from the disk,as well as when the tool was tilted at 30° at the 10 mm position were analysed. Secondly,based on the passivation mechanism of magnetoelastic abrasive particles in the double-disk magnetic passivation equipment,the passivation experimental scheme of the cutting edge of the tool at different positions was formulated,and the forward and reverse rotations of the tool were compared. Finally,the passivation effect of the tool under different parameters was discussed through the cutting edge morphology and passivation amount. Experiments show that the passivation effect of the tool is the best at a distance of 4 mm from the disk,and the passivation accuracy is high although the passivation speed is slow when the tool is reversed.

Key words: magnetoelastic abrasive particles, magnetic field, cutting edge morphology, magnetic passivation