公开(公告)号：US20250083252A1

公开(公告)日：2025-03-13

申请号：US18728075

申请日：2023-04-26

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshihiro YAMADA

IPC: B23K26/142 ,  B23K26/36

Abstract: This laser processing device includes: a laser light source unit that irradiates, with a laser light, the surface of a steel sheet being conveyed in a predetermined conveyance direction; a gas injection unit that injects a first gas in parallel with the optical axis direction of the laser light toward the irradiation site of the laser light; a dust collection mechanism unit that is provided at either an upstream side or a downstream side of the irradiation site in the conveyance direction and that collects laser spatter generated from the irradiation site via a dust collection port; and a gas supply unit that is disposed at an opposite side of the laser light source unit from the dust collection mechanism unit in the conveyance direction, and that supplies a second gas between the gas supply unit and the steel sheet.

公开(公告)号：US20240286219A1

公开(公告)日：2024-08-29

申请号：US18571267

申请日：2022-04-28

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshihiro YAMADA ,  Takeshi IMAI ,  Dairi YAJIMA ,  Hideyuki HAMAMURA ,  Yoshiaki HIROTA

IPC: B23K26/16 ,  B23K26/08 ,  B23K26/14 ,  B23K26/364 ,  B23K103/04

CPC classification number: B23K26/16 ,  B23K26/083 ,  B23K26/1464 ,  B23K26/364 ,  B23K2103/04

Abstract: A laser processing device includes: a laser light source unit that irradiates, with laser light, a surface of a steel sheet conveyed in a predetermined conveyance direction; a first nozzle that injects gas toward an irradiation site of the laser light, parallel to an optical axis direction of the laser light; and a dust collection mechanism unit that is provided only at one of an upstream side or a downstream side of the irradiation site, in the conveyance direction, and that collects, from a dust collection port, laser sputter generated from the irradiation site.