公开(公告)号：US20230241662A1

公开(公告)日：2023-08-03

申请号：US18014427

申请日：2021-07-09

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenichiro OTSUKA ,  Masafumi AZUMA ,  Yasuhiro ITO ,  Toru YONEBAYASHI

IPC: B21D19/08

CPC classification number: B21D19/08

Abstract: A burring processing method including increasing a diameter of a prepared hole provided in a metal component and bending a part of the metal component to form a burring processed portion (110) including an upright portion (120) and a curved portion (130), wherein in a cross-section that passes through an axis (cb) of the burring processed portion (110) and is parallel to the axis (cb) of the buffing processed portion (110), a cross-sectional shape of the curved portion (130) on an inner surface of the curved portion consists of a curve, and a length of the curved portion (130) in a direction perpendicular to the axis (cb) of the burring processed portion (110) is at least 1.2 times a height of the curved portion in a direction parallel to the axis (cb) of the burring processed portion (110).

公开(公告)号：US20230039571A1

公开(公告)日：2023-02-09

申请号：US17788131

申请日：2020-02-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Toshiki NONAKA ,  Toru YONEBAYASHI

IPC: C21D9/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00

Abstract: This steel sheet for a can is a steel sheet for a can containing, by mass %, C: 0.010% to 0.050%, Si: 0.020% or less, Mn: 0.10% to 0.60%, P: 0.020% or less, S: 0.020% or less, Al: 0.050% or less, N: 0.0100% or less, Nb: 0% to 0.03%, Ti: 0% to 0.03%, B: 0% to 0.0020%, and a remainder including Fe and an impurity, in which, when the number of carbides having an equivalent circle diameter of 2 μm or more and 5 μm or less is indicated by a, and the number of carbides having an equivalent circle diameter of 0.1 μm or more and less than 2 μm is indicated by b, a/b satisfies a range of the following formula (1), a fracture strain is 1.6 or more, and a sheet thickness is 0.10 to 0.30 mm. a/b

公开(公告)号：US20230100272A1

公开(公告)日：2023-03-30

申请号：US17802475

申请日：2021-02-26

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenichiro OTSUKA ,  Toru YONEBAYASHI ,  Satoshi SHIRAKAMI ,  Yasunori SAWA ,  Masafumi AZUMA ,  Ryuichi NISHIMURA

IPC: B62D25/02 ,  B60J5/04 ,  B62D29/00

Abstract: A stiffened panel structure includes a panel-shaped component and a wire. The panel-shaped component has a panel body that curves in such a manner as to be convex outward. The wire has a first end portion and a second end portion. The first end portion is bonded to a first point on the inner surface of the panel body. The second end portion is bonded to a second point on the inner surface of the panel body. The wire is strained between the first point and the second point.