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.