Two-step superplastic forming method

Details Two-step superplastic forming method Two-step superplastic forming method

1988-03-18

1989-04-18

Combs, E. Michael

Metal deforming

By application of fluent medium, or energy field

Using fixed die

294211, B21D 2200, B21D 2602

Patent

active

048215465

ABSTRACT:
A method of forming an object having a relatively deep cavity from a superplastic metallic blank wherein a preform having a bottom portion and sides sloping upwardly and outwardly therefrom is first superplastically formed in a female mold. The preform is then attached to a male mold with the bottom portion of the preform in a snug fit with a top portion of the male mold which has outside dimensions equal to the cavity in the object and thereafter the preform is superplastically forced against the male mold to form the desired object.

REFERENCES:
patent: 2728317 (1955-12-01), Clenvenger et al.
patent: 3340101 (1967-09-01), Fields, Jr. et al.
patent: 4405986 (1977-09-01), Laycock et al.
patent: 4409809 (1983-10-01), Buchanan
patent: 4644626 (1987-02-01), Barnes et al.

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