Method and apparatus for plastic deformation at high ambient pre

Details Method and apparatus for plastic deformation at high ambient pre Method and apparatus for plastic deformation at high ambient pre

1977-03-01

1978-04-25

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

72378, B21D 2210

Patent

active

040856054

ABSTRACT:
Method and apparatus for plastically de-forming material in a high pressure cylinder, the material being pre-formed into a mandrel billet with an attachment portion and a piston at respective opposite ends thereof and interconnected by an intermediate portion having a smaller cross section than the piston. Holder structure releasably mounted within the high pressure cylinder adjacent the pressure chamber retains the mandrel billet and includes securing means at one end for retaining the attachment portion and engagement means at the other end for slidably engaging the piston. Pressurization of the pressure chamber generates an increase in the pressure medium which acts on the transition surface between the intermediate portion and the piston to cause an elongation of the intermediate portion of the mandrel billet.

REFERENCES:
patent: 2136538 (1938-11-01), Borwick
patent: 3051217 (1962-08-01), Hill et al.
patent: 3751955 (1973-08-01), Stromblad

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