Up-set shrinker for producing thick wall steel pipe

Details Up-set shrinker for producing thick wall steel pipe Up-set shrinker for producing thick wall steel pipe

B - Operations, Transporting

21

J

78/23, 80/52

B21J 9/00 (2006.01) B21C 37/08 (2006.01) B21J 11/00 (2006.01)

Patent

CA 1134650

ABSTRACT OF THE DISCLOSURE In the production of steel pipe from thick steel plate, an up-set shrinker is employed for reducing and pro- cessing an O-shaped pipe-blank in equipment for producing thick wall steel pipe; the up-set shrinker includes a plurality of reducing shrinker dies which correspond with parts of the O-shaped pipe-blank other than butting parts of the adjacent edges, and a processing shrinker which corresponds with the butting parts of the adjacent edges, the processing shrinker die being formed with a deforming element, for example a projecting foreign member over the length of the die; the processing shrinker die and the reducing shrinker dies are independently operable.

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