Method and an apparatus for manufacturing a metallic bellows

Details Method and an apparatus for manufacturing a metallic bellows Method and an apparatus for manufacturing a metallic bellows

1990-04-18

1991-03-05

Jones, David

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72 20, 72 59, B21D 914

Patent

active

049968572

ABSTRACT:
A first insert member and a head member are inserted in a cylindrical metal material. A liquid pressure chamber is defined in the material by the first insert member and the head member. First and second dies are situated corresponding to the head member and the first insert member, respectively. When a pressurized liquid is fed into the liquid pressure chamber, that portion of the material situated between the first and second dies bulges outward. As the first and second dies are driven to approach each other with the bulging portion between them, a pleat with a U-shaped section is formed.

REFERENCES:
patent: 2773538 (1956-12-01), DeMers
patent: 2954064 (1960-09-01), DeMers
patent: 3015354 (1962-01-01), Wood
patent: 3105539 (1963-10-01), Johnson
patent: 3130771 (1964-04-01), Peyton
patent: 4751836 (1988-06-01), Breese

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