Patent ID: 11897048
Assignee: HITACHI POWER SOLUTIONS CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. The friction stir welding method according to claim 9, wherein
the predetermined state quantity range includes a state quantity range between a first threshold value separated from the reference state quantity in a direction in which a state quantity is small by a predetermined quantity and a third threshold value that is larger than the first threshold value and is separated from the reference state quantity in a direction in which the state quantity is small by a predetermined quantity, and a state quantity range between a second threshold value separated from the reference state quantity in the direction the state quantity is large by a predetermined quantity and a fourth threshold value that is larger than the second threshold value and is separated from the reference state quantity in the direction in which the state quantity is large by a predetermined quantity.