Method and apparatus for manufacturing curved pipe

Details Method and apparatus for manufacturing curved pipe Method and apparatus for manufacturing curved pipe

1988-10-27

1989-10-31

Combs, E. Michael

Metal deforming

By deflecting successively-presented portions of work during...

With feeding of discrete articles or orienting of work...

72134, 72166, 72369, B21D 708, B21D 912

Patent

active

048768723

ABSTRACT:
The present invention is directed to a curved pipe manufacturing method comprising the steps of: inserting a curved mandrel into a curved cavity of a fixed die having an entrance opening and an exit opening, the curved mandrel being attached to the distal end of an ejecting rod; forming a curved pipe by pressing a work, with a present rod through the entrance opening of the curved cavity into a curved annular chamber defined by the surfaces of the curved cavity and the mandrel; turning the movable block in one direction so that an ejecting rod attached at its base end with the movable block and concentrically integrated with the mandrel, ejects the mandrel together with the curved pipe from the entrance opening of the fixed die; advancing a movable chuck provided outside the entrance opening for chucking only the curved pipe; turning the movable block to another direction opposite to the one direction so as to return only the mandrel into the curved cavity of the fixed die; and retracting the movable chuck for removing the curved pipe. An apparatus for carrying out the curved pipe manufacturing method is also provided.

REFERENCES:
patent: 4352281 (1982-10-01), Ragettli
patent: 4759206 (1988-07-01), Kaneko

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