US 12,454,024 B2
Joining method and joined body
Takuya Fukuda, Kobe (JP); Naoki Takeoka, Kobe (JP); Ryoji Ohashi, Kobe (JP); and Shuhei Yoshikawa, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 18/288,445
Filed by KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
PCT Filed May 11, 2022, PCT No. PCT/JP2022/019908
§ 371(c)(1), (2) Date Oct. 26, 2023,
PCT Pub. No. WO2022/239795, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 2021-082331 (JP), filed on May 14, 2021.
Prior Publication US 2024/0207968 A1, Jun. 27, 2024
Int. Cl. B23K 20/00 (2006.01); B23K 20/12 (2006.01); B23K 103/04 (2006.01); B23K 103/08 (2006.01); B23K 103/12 (2006.01); B23K 103/20 (2006.01); B23K 103/24 (2006.01)
CPC B23K 20/1265 (2013.01) [B23K 20/123 (2013.01); B23K 20/126 (2013.01); B23K 2103/05 (2018.08); B23K 2103/12 (2018.08); B23K 2103/15 (2018.08); B23K 2103/20 (2018.08); B23K 2103/24 (2018.08)] 5 Claims
OG exemplary drawing
 
1. A welding method comprising:
creating an overlapping part where a first member and a second member overlap so that a lower surface of the first member is in contact with an upper surface of the second member, the overlapping part including one end and another end;
forming a first friction-stirred part at a one-end-side spot that is a spot that is closest to the one end of the overlapping part by plunging a rotary tool into the one-end-side spot from the first member;
forming a second friction-stirred part at an other-end-side spot that is away from the one-end-side spot and closer to the other end of the overlapping part by plunging the rotary tool into the other-end-side spot from the first member after the first friction-stirred part is formed; and
forming a third friction-stirred part at an intermediate spot between the one-end-side spot and the other-end-side spot by plunging the rotary tool into the intermediate spot of the overlapping part from the first member after the second friction-stirred part is formed,
wherein the rotary tool is plunged into each of the spots so that an input heat amount to the one-end-side spot and an input heat amount to the other-end-side spot are smaller than an input heat amount to the intermediate spot.