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：US20210023655A1

公开(公告)日：2021-01-28

申请号：US17066854

申请日：2020-10-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Michio SAKURAI ,  Toru SAKAI ,  Kenta KUBOTA ,  Takashi URASHIMA ,  Daichi HIGASHI

IPC: B23K26/21 ,  B23K26/70 ,  B23K26/082

Abstract: Laser welding is performed while moving irradiation positions of a laser beam and a measurement beam in forward, rightward, rearward and leftward directions, and the penetration depth of a weld portion is measured during laser welding in each of the directions. Then, a direction in which a value smaller than a reference value is measured is determined to be an optical axis deviation direction, and a correction value is added to the values measured during the laser welding when the laser welding is performed in the optical axis deviation direction.

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.