No-size squeezing of 180 degree boiler-tube return bends

Details No-size squeezing of 180 degree boiler-tube return bends No-size squeezing of 180 degree boiler-tube return bends

B - Operations, Transporting

21

D

153/15

B21D 9/00 (2006.01) B21C 37/28 (2006.01)

Patent

CA 1099621

Abstract of the Disclosure An apparatus for reducing the radius of the bend in a U- shaped tube comprises two squeeze dies and a back die. The back die is hollowed to form a chamber that accommodates the bent section of the tube and supports the entire circumference of the tube at the center of the bent section. Mating slide surfaces on the back die and the squeeze dies cooperate to extend the back die during squeezing in such a manner as to accommodate the extension of the tube that results from the squeezing. This arrangement enables relatively thin-walled tubes to be squeezed without undue deformation of the tube.

320877

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