公开(公告)号：US11958125B2

公开(公告)日：2024-04-16

申请号：US17278213

申请日：2019-09-17

Applicant: KYB Corporation

Inventor： Yasuyuki Nagai

IPC: B23K20/12 ,  F16B7/00 ,  B23K101/06

CPC classification number: B23K20/12 ,  F16B7/00 ,  B23K2101/06

Abstract: A manufacturing method includes a joining step of abutting and joining an end surface of a tube main body and a projecting portion of a head member by frictional welding in a state in which a through hole of the tube main body and the projecting portion of the head member are fitted with a fitting clearance. In the joining step, flow material which is practically flowed from an end surface of the tube main body and the flange portion of the head member is filled in the fitting clearance from the root side until the tip portion is located within the range in the direction of the rotation axis, thereby joining between a non-contact portion and the tube main body and between an inclined inner peripheral surface of the tube main body and an outer peripheral surface of the projecting portion by the flow material.