The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2020
Filed:
Dec. 14, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Daisuke Ichigozaki, Toyota, JP;
Takeshi Yamamoto, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
Provided is a method for producing a rare-earth magnet that can resolve a problem of deterioration of the residual magnetization and coercive force of the rare-earth magnet due to spring-back in producing the rare-earth magnet through performing hot deformation processing of upsetting on a sintered body. The method includes a first step of producing the sintered body through press-forming of magnetic powder for a rare-earth magnet, and a second step of producing a rare-earth magnet precursor through hot deformation processing of upsetting in which the sintered body is placed within a plastic processing mold and is pressurized in a predetermined direction so as to impart magnetic anisotropy to the sintered body, and performing cooling of the rare-earth magnet precursor while a predetermined pressure is kept being applied thereto in the predetermined direction, so that the rare-earth magnet is produced.