| 摘要 |
PROBLEM TO BE SOLVED: To uniformly and highly efficiently form a conductive film on the surface of a bond magnet in a highly adhesive state and to easily attain electroplating for the bond magnet, in order to efficiently manufacture R-Fe-B bonded magnets of various shapes, such as a ring shape and a disc shape of which corrosion resistance is improved by a metallic film. SOLUTION: In this manufacturing method, an R-Fe-B bonded magnet is barrel-ground by a barrel grinding device by the use of a drying method through the use of metallic fine pieces, i.g., Fe, Ni, Co, and Cr metallic file pieces, of undefined shapes such as spherical, block-like and needle-like (wire) shapes of required dimensions as media. In this case, ground metallic fine pieces are pressed into and applied to a resin surface and air hole parts formed on the surface of the bonded magnet, magnetic powder surfaces are also coated with metallic fine pieces, and an extremely uniform conductive film is formed on the surface of the R-Fe-B bonded magnet, so that fine electroplating for the bonded magnet can be attained and an R-Fe-B bonded magnet plated product having high corrosion resistance and capable of reducing the deterioration of magnetic characteristics can be obtained. |
