公开(公告)号：US20240269771A1

公开(公告)日：2024-08-15

申请号：US18396833

申请日：2023-12-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shotaro KUROKAWA ,  Kohei TAKAHASHI ,  Tomohiko SEKIGUCHI

IPC: B23K26/24

CPC classification number: B23K26/24

Abstract: A laser welding method is a laser irradiating method for irradiating with a laser beam an irradiation target surface of a welding target formed by a plurality of overlaid metal plates, and welding the plurality of metal plates, the plurality of metal plates include a first metal plate that forms the irradiation target surface, and a second metal plate, and the laser welding method includes: a first process of irradiating the irradiation target surface with the laser beam, thereby welding the plurality of metal plates, and forming a welded part; and a second process of irradiating with the laser beam a target range of the irradiation target surface including at least part of the welded part, and remelting at least the first metal plate without remelting the second metal plate among the plurality of metal plates after the first process.

公开(公告)号：US20240269778A1

公开(公告)日：2024-08-15

申请号：US18398316

申请日：2023-12-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shotaro KUROKAWA ,  Kohei TAKAHASHI ,  Tomohiko SEKIGUCHI

IPC: B23K26/70 ,  B23K26/08 ,  B23K26/21

CPC classification number: B23K26/702 ,  B23K26/083 ,  B23K26/21

Abstract: A laser welding device that welds an object to be welded including two or more members includes: a welding laser irradiation unit that faces the object, the welding laser irradiation unit welding the object by irradiating a target portion of the object with laser light; and a heating device disposed on an opposite side to the welding laser irradiation unit seen from the object, the heating device preheating the target portion by heating the target portion from the opposite side.

公开(公告)号：US20240269772A1

公开(公告)日：2024-08-15

申请号：US18396962

申请日：2023-12-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shotaro KUROKAWA ,  Kohei TAKAHASHI ,  Tomohiko SEKIGUCHI

IPC: B23K26/24

CPC classification number: B23K26/24

Abstract: There is provided a laser welding device that welds an object to be welded including two or more conductors contacting each other. The laser welding device includes: a welding laser irradiation unit that faces a first face of the object, the welding laser irradiation unit welding the object by irradiating the object with laser light; and a preheating device preheating the object. The preheating device includes a first electrode including a first contact part contacting the first face, and a second electrode including a second contact part contacting a second face of the object, the second face being on an opposite side to the first face. The preheating device heats at least part of the object by heat generated when a current flows in the object via the first electrode and the second electrode.

公开(公告)号：US20240017345A1

公开(公告)日：2024-01-18

申请号：US18273074

申请日：2022-02-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuhei OGURA ,  Tomohiko SEKIGUCHI ,  Shotaro KUROKAWA ,  Katsuhiro NAGASAWA ,  Hiroshi ADACHI ,  Daisuke YANAGIBASHI ,  Makoto AOYAMA ,  Keiichirou INAGAKI

IPC: B23K11/20 ,  B23K11/11 ,  B23K35/30 ,  B23K11/00

CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K35/302 ,  B23K11/0066 ,  B23K2103/18

Abstract: A method for joining different kinds of metal materials includes: preparing a rivet, a plurality of metal members, and a first electrode and a second electrode, each having shanks and electrode portions provided at the tips of the shanks; sandwiching the rivet and the plurality of metal members between a first electrode and a second electrode; and embedding the rivet into the metal member by pressurization and energization using the first electrode and the second electrode. The preparation step includes preparing, as the first electrode and the second electrode, two electrodes that satisfy a condition in which each of electrical resistance values of the first and second electrodes is lower than or equal to a sum of an electrical resistance value of the plurality of metal members to be joined and an electrical resistance value of the rivet.