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Mandrel Bender

Information to the Mandrel Bending Machine
The Tools

(1) Clamping unit:
The clamps are delivered depending on requirements with smooth od. Corrugated surface.
 
(2) Thrust bearing:
To support the bending process, you need a thrust bearing. For thick-walled tubes using counter rollers. Thin-walled ...
tubes are bent with slide rails.
 
(3) bending mandrels:
Bending mandrels support the outside of the tube while bending. Bending mandrels are responsible for the ovality of the Tube and prevent limited wrinkling.
 

(4) Bending tool:
The bending tool defines the bending radius of  the tube. For example, for a 42 mm tube R = 42 x 2 = 84 mm.
 
(5) Rigid Mandrel:
Rigid mandrels are used for thick-walled pipes and large bending radii.
 
(6) ball mandrel / mandrel members:
Ball mandrels have at the end of the rigid mandrel, one or more movable balls. Thus, the mandrel supports the tube even deeper in the bow. With ball mandrels thin-walled tubes are bent with small bending radii. The smaller the bending radius and the thin-walled tube, the more balls are used. When using ball mandrels seamless pipes or tubes with smoothed weld are required.
 
(7) wrinkle:
If, wrinkles accure while bending with a mandrel, the use of a wiper die is necessary. Wiper die´s do not smooth out wrinkle, but prevent the formation of wrinkles. You can often dispense with the use of a wiper die when annealed tubes are bent.