US 12,134,117 B2
Coupling device for tubular member, different-material joining method using same, and manufacturing method for tubular member equipped with different-material-joining auxiliary member
Reiichi Suzuki, Kanagawa (JP)
Assigned to Kobe Steel, Ltd., Kobe (JP)
Appl. No. 17/623,028
Filed by Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Kobe (JP)
PCT Filed Jun. 12, 2020, PCT No. PCT/JP2020/023248
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2020/262045, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-122510 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0258225 A1, Aug. 18, 2022
Int. Cl. B21D 39/04 (2006.01); B23K 9/00 (2006.01); F16L 13/007 (2006.01); F16L 13/14 (2006.01)
CPC B21D 39/046 (2013.01) [B21D 39/048 (2013.01); B23K 9/0026 (2013.01); F16L 13/007 (2013.01); F16L 13/141 (2013.01); Y10T 29/49927 (2015.01); Y10T 29/49929 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A device for coupling tubular members, the device that couples a tubular inner member with a tubular outer member disposed around the inner member, the coupling device comprising:
a base that holds the inner member and the outer member in a state in which the outer member is disposed around the inner member;
a plurality of pressing members that are supported by the base around the outer member in a manner in which the pressing members are movable in a radial direction of the inner member and the outer member, a tip end of each of the pressing members having a protruding portion;
a pressurizing member that comes into contact with an end part of the pressing members and pressurize the pressing members inward in the radial direction;
a drive mechanism that drives one of the base and the pressurizing member so as to move relative to the other one of the base and the pressurizing member in a direction perpendicular to a moving direction of the pressing members; and
a mechanism for returning the pressing members,
wherein the drive mechanism drives one of the base and the pressurizing member to displace the pressing members inward in the radial direction, so that a part of a peripheral wall of the outer member is bulged inward in the radial direction by the protruding portion, and the inner member and the outer member are caulked and coupled to each other, and
wherein the mechanism is positioned between the pressing members and the peripheral wall of the outer member so as to displace the plurality of pressing members outward in the radial direction relative to the inner member and the outer member that are caulked and coupled to each other.