US 12,145,211 B2
Rotary tool, joining device, and joining method
Nobushiro Seo, Shizuoka (JP); Ryo Yoshida, Shizuoka (JP); Shingo Koizumi, Shizuoka (JP); and Keita Oikawa, Shizuoka (JP)
Assigned to NIPPON LIGHT METAL COMPANY, LTD., Tokyo (JP)
Appl. No. 18/255,798
Filed by NIPPON LIGHT METAL COMPANY, LTD., Tokyo (JP)
PCT Filed Nov. 1, 2021, PCT No. PCT/JP2021/040287
§ 371(c)(1), (2) Date Jun. 2, 2023,
PCT Pub. No. WO2022/118589, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2020-201869 (JP), filed on Dec. 4, 2020.
Prior Publication US 2024/0001479 A1, Jan. 4, 2024
Int. Cl. B23K 20/12 (2006.01)
CPC B23K 20/1255 (2013.01) [B23K 20/1225 (2013.01); B23K 20/126 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A rotary tool used in a joining device that performs friction stir welding of a joint member, the rotary tool comprising:
a main body having a fixed unit attached and secured to the joining device, and a rotary shaft for transmitting a rotary force from the joining device;
a stirring pin that is arranged on the main body so as to be rotatable by receiving the rotary force from the main body and to be movable relative to an axial direction of the rotary shaft, and that is inserted into the joint member to perform friction stirring on the joint member;
a shoulder that is formed separately from the stirring pin, that is arranged on the main body so as not to receive the rotary force from the main body but to be movable separately from the stirring pin relative to the axial direction of the rotary shaft, and that presses the joint member while in contact with the joint member; and
a first elastic member that biases the stirring pin toward a distal-end side relative to the axial direction of the rotary shaft.