Patent ID: 11911819
Assignee: FUTABA INDUSTRIAL CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A shaping method for a double pipe, the method comprising:
bending the double pipe with a specified curvature to form a bent portion in the double pipe; and
arranging the bent portion on a first shaping die that comprises a first shaping surface at a position biased inward or outward in a curvature radius direction of the bent portion relative to the first shaping surface, the first shaping surface being configured to shape a first outer surface of both outer surfaces of the bent portion that are located on both sides of a plane including a central axis of the bent portion, and pressing the bent portion arranged on the first shaping die by a second shaping die that comprises a second shaping surface configured to shape a second outer surface of the both outer surfaces of the bent portion.