| 摘要 |
PURPOSE:To improve polishing efficiency in polishing of the surface of a workpiece by magnetic abrasion grains using magnetism by supplying three-phase AC power to more than three coils, charging the magnetic abrasion grains into the working space and rotating the workpiece. CONSTITUTION:The apparatus includes an aluminum base 12 of a magnetic insulator on a milling table 11, another aluminum base 14 of a magnetic insulator on a board 13, a ring-shaped yoke 7 of SS 41 material, cores 5, six coils 10 and magnetic poles 6. In operation, a workpiece 8 is mounted to a spindle 15 of the milling machine, with the surface to be machined facing the tip ends of the magnetic poles 6, and AC power is supplied in an exciting circuit for forming rotating magnetic field to form the rotating magnetic field, and magnetic abrasion grains are charged in the working space 9 and the workpiece 8 is rotated to polish the surface of the workpiece. This assures a great amount of polishing, improving polishing efficiency. |
