US 11,865,638 B2
Laser welding device
Kouji Takemoto, Echizen (JP); Kazuyoshi Miyamoto, Echizen (JP); Tomoaki Yoshida, Echizen (JP); Daichi Sumimori, Kani (JP); and Hiroshi Hasegawa, Kani (JP)
Assigned to AISIN FUKUI CORPORATION, Echizen (JP)
Appl. No. 17/299,414
Filed by AISIN FUKUI CORPORATION, Echizen (JP)
PCT Filed Dec. 4, 2019, PCT No. PCT/JP2019/047400
§ 371(c)(1), (2) Date Jun. 3, 2021,
PCT Pub. No. WO2020/116502, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-227552 (JP), filed on Dec. 4, 2018.
Prior Publication US 2022/0055150 A1, Feb. 24, 2022
Int. Cl. B23K 26/12 (2014.01); B23K 26/70 (2014.01); B23K 26/16 (2006.01); B23K 26/21 (2014.01)
CPC B23K 26/127 (2013.01) [B23K 26/16 (2013.01); B23K 26/702 (2015.10); B23K 26/123 (2013.01); B23K 26/21 (2015.10)] 9 Claims
OG exemplary drawing
 
1. A laser welding device comprising:
a chamber which has an internal space in which a workpiece is disposed;
a laser beam irradiation unit which irradiates the workpiece with a laser beam to weld the workpiece;
a pump which suctions air in the chamber and decreases a pressure in the chamber;
a laser transmission window through which the laser beam emitted from the laser beam irradiation unit is transmitted; and
a shutter which is disposed on a chamber side with respect to the laser transmission window and configured to close so as to isolate the laser transmission window from the internal space when the pressure in the chamber is returned to an atmospheric pressure after laser welding.