Patent ID: 11897050
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for joining dissimilar metals in which a first member having a plate shape and containing first metal is butt-joined to a second member having a plate shape and containing second metal having a melting point higher than that of the first metal using frictional heat, the method comprising:
overlapping an end portion of the second member on an end portion of the first member; and
pressurizing the second member toward the first member by bringing a rotating joining tool having a protruding portion at a tip end into contact with an overlapping portion of the second member with the first member,
when the second member is pressurized toward the first member, the tip end of the rotating joining tool being not in contact with the first member,
wherein:
in overlapping the end portion of the second member on the end portion of the first member, the first member and the second member are placed on a backing, and
in pressurizing the second member toward the first member by bringing the rotating joining tool into contact with the overlapping portion of the second member with the first member, a part of the first metal discharged from a joining face between the first member and the second member is discharged to a recessed portion provided on a surface of the backing.