Advanced forming techniques for superplastic forming

Details Advanced forming techniques for superplastic forming Advanced forming techniques for superplastic forming

1996-12-21

1999-01-26

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 60, B21D 2210

Patent

active

058626956

ABSTRACT:
This invention defines an improved method for superplastic forming (SPF) of metallic parts in which a cutout is formed in the blank from which the parts will be formed, and a secondary sheet is located between the blank and the pressurized gas. The cutout area of the blank becomes stretched so that there is minimal thinning in the air near the periphery of the cutout(s) in the blank, the secondary sheet is required to carry the gas pressure and to form the parts.

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