Manufacturing device for bent pipe and method of manufacturing bent pipe

A manufacturing device for a bent pipe by which the bent pipe is obtained by bending a double pipe provided with a first pipe, a second pipe containing the first pipe therein, and a coupling portion coupling the first pipe and the second pipe to each other, the manufacturing device comprising:

• an inner core metal configured to be placed inside the first pipe;
• an intermediate core metal configured to be placed between the first pipe and the second pipe;
• a bending mold configured to bend the double pipe;
• and
• a controller configured to execute:
• a first bending process in which the first pipe and the second pipe are bent in a first direction with the bending mold in a first area of the double pipe where the inner core metal and the intermediate core metal are placed;
• a second bending process in which the first pipe and the second pipe are bent in a second direction with the bending mold after the first bending process, the second bending process being applied to a second area of the double pipe where the inner core metal and the intermediate core metal are placed, the second area having more distance from the coupling portion than the first area does;
• and
• a re-bending process in which the second pipe is bent in the same direction as the second direction in the second area after the second bending process.