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:
Dec. 29, 2020
Filed:
May. 19, 2016
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Tomohisa Yamashita, Suita, JP;
Kunihiro Yabuno, Matsubara, JP;
Ken Yoshino, Guangdong, CN;
Sho Takamoto, Osaka, JP;
Hiroyuki Kurokawa, Nishinomiya, JP;
Kenji Tamura, Takatsuki, JP;
Junichi Okubo, Amagasaki, JP;
Kiyoshi Nakayama, Osaka, JP;
Toru Horiuchi, Osaka, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A forged crankshaft manufacturing apparatus processes a forged blank with no flash. The forged blank includes at least one rough crank arm having an excess portion protruding from an outer periphery of a side portion thereof. The manufacturing apparatus includes a first die and a second die paired with each other, a retaining device, and a moving device. The first die and the second die bend or crash the excess portion. The retaining device retains at least one of the rough journals or at least one of the rough pins such that a rough pin decentering direction is perpendicular to a reducing direction in which the first die and the second die apply force for reduction. The moving device supports the retaining device such that the retaining device is movable in the reducing direction.