US 12,115,594 B2
Welding method and welding apparatus
Tomomichi Yasuoka, Tokyo (JP); Takashi Kayahara, Tokyo (JP); Ryosuke Nishii, Tokyo (JP); Koji Kirikae, Tokyo (JP); Keigo Matsunaga, Tokyo (JP); and Takashi Shigematsu, Tokyo (JP)
Assigned to FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed by FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed on Feb. 24, 2021, as Appl. No. 17/183,495.
Application 17/183,495 is a continuation of application No. PCT/JP2019/034801, filed on Sep. 4, 2019.
Claims priority of application No. 2018-165082 (JP), filed on Sep. 4, 2018.
Prior Publication US 2021/0178514 A1, Jun. 17, 2021
Int. Cl. B23K 26/067 (2006.01); B23K 26/06 (2014.01); B23K 26/08 (2014.01); B23K 26/21 (2014.01); B23K 26/32 (2014.01); B23K 103/04 (2006.01); B23K 103/10 (2006.01)
CPC B23K 26/067 (2013.01) [B23K 26/0648 (2013.01); B23K 26/08 (2013.01); B23K 26/21 (2015.10); B23K 26/32 (2013.01); B23K 2103/04 (2018.08); B23K 2103/10 (2018.08)] 15 Claims
OG exemplary drawing
 
1. A welding method comprising:
emitting laser beam toward a workpiece including a metal to melt and weld a part of the workpiece, the part being where the laser beam has been emitted to, wherein:
the laser beam includes a main power region and at least one auxiliary power region,
a power of the main power region is larger than a power of each of the at least one auxiliary power region, and
a ratio between the power of the main power region and the total of powers of the at least one auxiliary power region is in a range of 144:1 to 1:9,
the laser beam includes a plurality of the auxiliary power regions, and the plurality of auxiliary regions is positioned so as to surround at least a part of a periphery of the main power region, and
a distance between a center of each of the auxiliary power regions and a center of the main power region is in a range of 225 μm to 900 μm.