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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.:

US 12459023 B1

PDFFull Text
Date of Patent:
Nov. 04, 2025

Filed:

Aug. 25, 2023

Welding monitoring apparatus and welding monitoring method

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Noboru Hasegawa, Tokyo, JP;

Michitoshi Tanimoto, Tokyo, JP;

Michimasa Mukai, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Steven W Crabb

Assistant Examiner:

Alba T Rosario-Aponte

Int. Cl.
CPC ...
B21C 51/00 (2006.01); B21C 37/08 (2006.01); B23K 11/06 (2006.01); B23K 11/087 (2006.01); B23K 11/25 (2006.01); B23K 13/02 (2006.01); B23K 13/08 (2006.01); B23K 31/00 (2006.01); B23K 31/12 (2006.01); G01N 21/892 (2006.01); G01N 21/952 (2006.01); G01N 29/04 (2006.01);
U.S. Cl.
CPC ...
B21C 51/00 (2013.01); B21C 37/08 (2013.01); B21C 37/0818 (2013.01); B23K 11/062 (2013.01); B23K 11/0873 (2013.01); B23K 11/252 (2013.01); B23K 13/02 (2013.01); B23K 13/08 (2013.01); B23K 31/003 (2013.01); B23K 31/125 (2013.01); G01N 21/892 (2013.01); G01N 21/952 (2013.01); G01N 29/041 (2013.01); G01N 29/043 (2013.01); G01N 2291/267 (2013.01);
Abstract

Provided is a welding monitoring apparatus that monitors a welding state of a V-convergence region in which a strip-shaped metal sheet is converged in a V-shape, when the metal sheet is cylindrically formed while being conveyed, and both side edges of the metal sheet are heated and melted in a manner of being butted each other while being converged in the V-shape, such that an electric resistance welded steel pipe is manufactured. This welding monitoring apparatus includes an image capturing unit that captures images of a region including the V-convergence region in time series; and an image processing unit that extracts a welding point based on the images captured in time series and detects the presence or absence and a position of irregular arcing at the welding point or on an upstream side of the welding point.

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