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:
Apr. 21, 2025
Filed:
Jun. 17, 2021
Applicant:
Nippon Steel Corporation, Tokyo, JP;
Inventor:
Shohei Tamura, Tokyo, JP;
Assignee:
NIPPON STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 22/26 (2005.12); B21D 7/06 (2005.12); B21D 22/02 (2005.12); B21D 47/01 (2005.12); B21D 51/02 (2005.12);
U.S. Cl.
CPC ...
B21D 22/26 (2012.12); B21D 51/02 (2012.12);
Abstract
Disclosed is a manufacturing method that can suppress the occurrence of wrinkles and buckling deformation due to bending when bending and cross-sectioning are performed on a tube using a press die. The manufacturing method of the present disclosure includes applying pressure to a bent tube having a curved portion from the outside of the tube to the inside of the tube using a press die, thereby simultaneously performing cross-sectioning of the curved portion and bending of the curved portion to reduce the bend radius of the curved portion.