| 摘要 |
PURPOSE:To efficiently carry out flat surface-polishing, by arranging a plurality of magnetic pole pieces for constituting N-poles and S-poles, in concave and convex shapes, and by providing a non-magnetic material at the convex parts of each magnetic pole piece so that magnetic abrasive is concentrated at the concave part of the magnetic pole piece. CONSTITUTION:In a tool made of magnetic material, six magnetic pole pieces 2 in a dog-leg shape for constituting N-poles and S-poles are circularly positioned, and therefore, arranged in concave and convex shapes, the convex part 3 of each magnetic pole piece 2 being provided with a non-magnetic material 4. The tool 1 is attached by means of bolts 10 to an iron core which is integrally secured to a yoke 5 by bolts 6 and around which a coil 12 is wound. In the case of a non-magnetic work 14, a supporting bed 15 is secured to a table 18 with non- magnetic materials 17 being interposed therebetween, so that a gap 16 is defined between the flat surface of the work 14 which is set on the supporting bed 15, and the convex parts 3 of the magnetic pole pieces 3. Meanwhile, in the case of a magnetic material work 14, the work 17 is set on the table 18 with the non- magnetic materials 17 being interposed therebetween. |
