Method and apparatus of bending metal elongate materials

Details Method and apparatus of bending metal elongate materials Method and apparatus of bending metal elongate materials

B - Operations, Transporting

21

D

153/15

B21D 9/00 (2006.01) B21D 7/025 (2006.01)

Patent

CA 1100397

A B S T R A C T A method of and an apparatus for bending an elongate metal element, such as a pipe, are disclosed. An arm is secured to each end of the element portion to be bent and with a pulling device such as a chain, hydraulic cylinder or the like connecting the arms. The pulling device is operated to exert a bending moment on the element that is insufficient to cause its permanent deformation. A local bending stimulation is then applied to and moved along the pipe to cause the required bending. The stimulator may be a mechanical roll or press bender or it may simply be a heater. The arrangement may be such that a large compressive force is applied to the workpiece to prevent wall thinning on the outside of the bend.

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