US 12,459,034 B2
Method for manufacturing riveted joint, riveted joint, and vehicle component
Hiroki Fujimoto, Tokyo (JP); Toshiyuki Manabe, Tokyo (JP); Atsushi Ono, Tokyo (JP); Koji Akioka, Tokyo (JP); and Takashi Imamura, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/693,171
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Aug. 16, 2022, PCT No. PCT/JP2022/030925
§ 371(c)(1), (2) Date Mar. 19, 2024,
PCT Pub. No. WO2023/047840, PCT Pub. Date Mar. 30, 2023.
Claims priority of application No. 2021-156655 (JP), filed on Sep. 27, 2021.
Prior Publication US 2025/0128315 A1, Apr. 24, 2025
Int. Cl. B21J 15/08 (2006.01); B23K 11/00 (2006.01); F16B 5/04 (2006.01); F16B 5/08 (2006.01)
CPC B21J 15/08 (2013.01) [B23K 11/0066 (2013.01); F16B 5/04 (2013.01); F16B 5/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for manufacturing a riveted joint, comprising:
causing a shaft portion of a steel rivet having the shaft portion and a head portion to pass through through-holes of a plurality of overlaid sheet members;
sandwiching the rivet between a pair of electrodes in an axial direction of the rivet;
applying a force to the rivet and energizing the rivet with a pair of the electrodes to form a deformed portion at a distal end of the shaft portion; and
cooling the rivet, wherein
a Vickers hardness HB (HV) of the head portion of the rivet after cooling satisfies 130≤HB≤330, and
in the rivet after cooling, a Vickers hardness HA (HV) of the deformed portion, a thickness TA (mm) of the deformed portion, a Vickers hardness HJ (HV) of a portion of the shaft portion at a center in the axial direction and at a center in a radial direction, a diameter DJ (mm) of the shaft portion, a Vickers hardness HB (HV) of the head portion, and a thickness TB (mm) of the head portion satisfy the following Equations 1 and 2:

OG Complex Work Unit Math