Patent ID: 11946580
Assignee: KOBE STEEL, LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 10:
11. A method for producing a joined body, comprising the following steps of:
preparing a tubular first member, a second member including a plate-shaped wall portion in which a through-hole is formed, and a collar member; wherein the wall portion includes a first main surface and a second main surface facing each other in a thickness direction of the wall portion; the collar member includes: a first base portion disposed on the first main surface; and a tubular portion connected to the first base portion, extending in the thickness direction to penetrate the through-hole, including a first end portion located at a distance from the second main surface in the thickness direction, and having an inner peripheral surface in contact with the first member and an outer peripheral surface in contact with the hole peripheral wall of the through-hole; wherein the collar member in its entirety stays on the external surface of the first member;
inserting the first member into the through-hole so that the collar member is interposed between the first member and the second member on a hole peripheral wall of the through-hole; and
expanding the first member toward the second member in a portion corresponding to the through-hole, thereby bonding and joining the first member and the second member so that a pair of bulging portions is formed in the first member with respect to the through-hole as a boundary, and the second member and the collar member disposed between the pair of bulging portions.