公开(公告)号：US20230158606A1

公开(公告)日：2023-05-25

申请号：US18158457

申请日：2023-01-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： JINGBO WANG ,  TSUTOMU SUGIYAMA ,  SHUNSUKE KAWAI ,  KENZO SHIBATA ,  MASASHI ISHIGURO ,  ATSUHIRO KAWAMOTO

IPC: B23K26/21 ,  B23K26/082 ,  B23K26/08

CPC classification number: B23K26/21 ,  B23K26/082 ,  B23K26/0884

Abstract: Provided is a laser welding method including a welding step of welding a workpiece by irradiating a surface of a workpiece with a laser beam that is swept two-dimensionally while being advanced in an X direction. In the welding step, the laser beam is swept to draw a predetermined pattern on the surface of the workpiece. Additionally, drawing speed and output of the laser beam are controlled to have an equal amount of heat input per unit drawing length in the predetermined pattern over the entire length of the predetermined pattern. The predetermined pattern is a continuous pattern in which two annular patterns are in contact with each other at one point.

公开(公告)号：US20230013501A1

公开(公告)日：2023-01-19

申请号：US17935111

申请日：2022-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： JINGBO WANG ,  TSUTOMU SUGIYAMA ,  SHUNSUKE KAWAI ,  KENZO SHIBATA ,  MASASHI ISHIGURO

IPC: B23K26/21

Abstract: A laser welding method includes a welding step of applying a laser beam to a surface of a workpiece while the laser beam is caused to advance in an X-direction and scanning with the laser beam is simultaneously performed in a Y-direction intersecting the X-direction. The welding step includes a first weaving step of causing the laser beam to weave in the Y-direction with first amplitude (A1), and a second weaving step of causing the laser beam to weave with a predetermined amplitude smaller than first amplitude (A1) at both end portions of a weaving trajectory drawn by the laser beam in the first weaving step.