To provide a method for manufacturing an anticorrsive R-Fe-B bonded magnet, including an optimum industrial process, for providing an anticorrosive coating with high contact strength and good dimensional accuracy on the surface of a porous R-Fe-B bonded magnet, where a plating solution and a cleaning solution are prevented from entering and remaining.
A R-Fe-B bonded magnet is subjected to barrel abrasion by a barrel device using a dry method using Al fine pieces such as spherical, block- like, or needle-like (wire) shapes having predetermined dimensions as a medium, and the crushed Al fine pieces are applied under pressures to a resin surface and a sealing hole part on the surface of the bonded magnet. The Al fine pieces are also applied to the magnetic powder surface, and zinc substitution processing is carried out for preventing the dissolution of Al at the subsequent electroplating. Thus, high conductivity can be imparted by forming an Al coating film on the surface of the R-Fe-B bonded magnet, so that a fine electrolytic plating layer having no pin hole can be formed.
| JPS5589462 | MANUFACTURING METHOD OF INTERMETALLIC COMPOUND MAGNET |
| WO/2011/108704 | SINTERED RARE-EARTH MAGNET AND MOTOR |
NISHIUCHI TAKESHI
KIKUI FUMIAKI
