公开(公告)号：US20240269770A1

公开(公告)日：2024-08-15

申请号：US18007496

申请日：2021-10-28

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Morihiko YAMAGUCHI

IPC: B23K26/082 ,  B23K26/26 ,  B23K103/04

CPC classification number: B23K26/082 ,  B23K26/26 ,  B23K2103/04

Abstract: In a laser welding method for welding a first metal member and a second metal member, a first wobbling process is carried out in which a first laser beam is directed in a first scanning pattern along a butt-joining line and a first welded part is formed. A second wobbling process is subsequently performed in which a second laser beam is directed in a second scanning pattern along the surface of the first welded part formed through the first wobbling process and a second welded part that is wider and shallower than the first welded part is formed overlapping the first welded part. A welded part in which delayed cracking can be prevented or suppressed is thus formed.