公开(公告)号：US20210220942A1

公开(公告)日：2021-07-22

申请号：US15734338

申请日：2019-05-28

Applicant: OSAKA UNIVERSITY

Inventor： Hidetoshi Fujii ,  Yoshiaki Morisada ,  Yasuhiro Aoki ,  Akihiko Ikuta

IPC: B23K20/12

Abstract: Provided are a long-life and inexpensive friction stir welding tool that is not dependent on the mode of friction stir welding or the type of material to be welded, and a friction stir welding method using the friction stir welding tool. The friction stir welding tool comprises a body portion having a shoulder portion, and a probe portion disposed on a bottom surface of the body portion, and is characterized in that the probe portion is spherical-crown shaped. Preferably, the shoulder portion is flat or convex, and preferably the hardness of the shoulder portion is greater than the hardness of the probe portion.

公开(公告)号：US11534854B2

公开(公告)日：2022-12-27

申请号：US15734338

申请日：2019-05-28

Applicant: OSAKA UNIVERSITY

Inventor： Hidetoshi Fujii ,  Yoshiaki Morisada ,  Yasuhiro Aoki ,  Akihiko Ikuta

IPC: B23K20/00 ,  B23K20/12 ,  B23K103/14 ,  B23K103/02

Abstract: Provided are a long-life and inexpensive friction stir welding tool that is not dependent on the mode of friction stir welding or the type of material to be welded, and a friction stir welding method using the friction stir welding tool. The friction stir welding tool comprises a body portion having a shoulder portion, and a probe portion disposed on a bottom surface of the body portion, and is characterized in that the probe portion is spherical-crown shaped. Preferably, the shoulder portion is flat or convex, and preferably the hardness of the shoulder portion is greater than the hardness of the probe portion.