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：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：US20190126399A1

公开(公告)日：2019-05-02

申请号：US16170450

申请日：2018-10-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takashi URASHIMA

IPC: B23K26/24

Abstract: A laser-welding apparatus is disclosed, which includes: a laser output section that emits a laser beam; a measurement beam source that outputs a measurement beam having a wavelength different from that of the laser beam and periodically changes the wavelength of the measurement beam when outputting the measurement beam; an optical member that irradiates a weld part with the laser beam and the measurement beam from the measurement beam source while coaxially overlapping the laser beam and the measurement beam with each other; and an optical interferometer that measures a keyhole depth of the weld part based on interference which occurs due to an optical path difference between the measurement beam reflected by the weld part, and a reference beam, in which an average of a scanning speed of an optical frequency in the measurement beam source is greater than or equal to 2000 PHz per second.