公开(公告)号：US20210031298A1

公开(公告)日：2021-02-04

申请号：US17066875

申请日：2020-10-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toru SAKAI ,  Michio SAKURAI ,  Toshiyuki MISHIMA ,  Kenta KUBOTA ,  Kensuke URATA

IPC: B23K26/03 ,  G01B11/22 ,  G01B9/02

Abstract: A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam deviates from a laser beam. Then, a first parallel plate and a second parallel plate are rotated to move an irradiation position of the measurement beam so that an optical axis of the measurement beam is substantially coaxial with an optical axis of the laser beam.

公开(公告)号：US20190126389A1

公开(公告)日：2019-05-02

申请号：US16170831

申请日：2018-10-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takayuki FUKAE ,  Takashi URASHIMA ,  Toshiyuki MISHIMA ,  Toru SAKAI ,  Michio SAKURAI

IPC: B23K26/03 ,  B23K26/06 ,  B23K26/22 ,  B23K31/12

Abstract: The present invention relates to a laser-welding apparatus and a laser-welding method. The laser-welding apparatus of the present invention includes: a laser output section that emits a laser beam toward a weld part of a welding target member; an optical interferometer that measures a weld penetration depth of the weld part based on interference which occurs due to an optical path difference between a measurement beam and a reference beam, the measurement beam having a frequency length different from that of the laser beam and having been emitted to the weld part while being coaxially overlapped with the laser beam, and reflected by the weld part; and a protection optical member disposed on an optical path between the welding target member and the laser output section while being inclined with respect to a plane perpendicular to an optical axis of the measurement beam.

公开(公告)号：US20240424613A1

公开(公告)日：2024-12-26

申请号：US18815055

申请日：2024-08-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenta KUBOTA ,  Michio SAKURAI ,  Toshiyuki MISHIMA ,  Toru SAKAI

IPC: B23K31/12 ,  B23K26/21 ,  G01B11/22

Abstract: Point group data obtained by measuring the penetration depth of a keyhole 66 during laser welding is divided into a plurality of regions in the depth direction of measured values, and evaluation data showing a change in number of points with time is acquired for each of the plurality of regions. An average variation in number of points is calculated for each of the plurality of regions based on the plurality of pieces of evaluation data. When the average variation is equal to or larger than a predetermined threshold, it is determined that measurement of the penetration depth of the keyhole 66 is unstable under the welding condition.

公开(公告)号：US20210023651A1

公开(公告)日：2021-01-28

申请号：US17066823

申请日：2020-10-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Michio SAKURAI ,  Toshiyuki MISHIMA ,  Toru SAKAI ,  Kenta KUBOTA ,  Kensuke URATA

IPC: B23K26/03 ,  B23K26/04

Abstract: A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam S deviates from a laser beam L. In performing laser welding in the optical axis deviation direction, an irradiation position of the measurement beam S is changed so that the irradiation position of the measurement beam S is moved to a rear side of the center of the optical axis of the laser beam L in the welding direction.