公开(公告)号：US12194555B2

公开(公告)日：2025-01-14

申请号：US17779668

申请日：2020-10-30

Applicant: TMEIC Corporation

Inventor： Fumihiko Inoue ,  Masatsugu Hirose

IPC: B23G1/16 ,  B23G1/44 ,  B21J15/02 ,  B23G1/26

Abstract: A method for making a screw hole in a workpiece including a plate-shaped portion includes: preparing an auxiliary member having a flat plate shape; forming, in the plate-shaped portion, a first pilot hole having a minor diameter smaller than a major diameter of the screw hole; forming, in the auxiliary member, a second pilot hole having a minor diameter smaller than the major diameter of the screw hole; fixing the auxiliary member to the plate-shaped portion so that the first pilot hole is concentric with the second pilot hole; and making the screw hole in the plate-shaped portion and the auxiliary member by inserting a tap in the first pilot hole and the second pilot hole.