公开(公告)号：EP4494779A1

公开(公告)日：2025-01-22

申请号：EP23770140.4

申请日：2023-02-01

Applicant: NHK Spring Co., Ltd.

Inventor： ARAKI, Yoshihito ,  FUKUOKA, Yuusuke ,  FURUGORI, Nobuyuki

IPC: B21J15/00 ,  B21J15/02 ,  B21J15/10

Abstract: A novel punch for riveting with reduced load on a shaft of a rivet is provided. Alternatively, a device that is disposed with a novel punch for riveting with reduced load on a shaft of a rivet is provided. Alternatively, a method for joining members using a novel punch for riveting with reduced load on a shaft of a rivet is provided. A punch for riveting according to an embodiment of present invention includes joining a first member having a convex part and a second member having a through hole fitting with the convex part by plastically deforming the convex part, wherein a contact surface with the convex part is inclined in a range of 80° to 89° with respect to a center axis.