Method and apparatus for manufacturing curved pipe

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

1989-12-11

1991-02-05

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

049894358

ABSTRACT:
A curved pipe manufacturing method comprises the steps of providing a fixed die having a curved cavity, an entrance opening and an exit opening contained therein, the curved cavity being formed in a circular arc and extending from the entrance opening to the exit opening, providing a movable block having a curved mandrel attached to one side thereof and an ejecting rod on the side thereof opposite to the curved mandrel, inserting the curved mandrel into the curved cavity of the fixed die through the exit opening therein and forming a curved annular chamber inside the cavity, pressing a work with a presser rod through the entrance opening into the curved annular chamber to form a curved pipe, providing a stopper through hole adjacent to the exit opening of the fixed die so that the through hole of the stopper is positioned in a turning track of the mandrel and restrains the tip end of the curved pipe, moving the movable block so as to remove only the mandrel from the exit opening while the curved pipe is restrained from movement by the stopper, inserting the ejecting rod into the entrance opening so as to extract the curved pipe from the exit opening of the fixed die, and recovering the curved pipe. An apparatus for carrying out the curved pipe manufacturing method is provided.

REFERENCES:
patent: 4759206 (1988-07-01), Kaneko
patent: 4875353 (1989-10-01), Kaneko
patent: 4876872 (1989-10-01), Kaneko

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