Advanced forming techniques for superplastic forming

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

B - Operations, Transporting

21

D

B21D 26/02 (2006.01) B21D 22/26 (2006.01)

Patent

CA 2221076

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 peripheryof the cutout(s) in the blank, the secondary sheet is required to carry the gas pressure and to form the parts.

La présente invention se rapporte à une amélioration apportée à une méthode de formage superplastique de pièces métalliques. Une découpe est réalisée à même le flan à partir duquel les pièces sont formées et une feuille secondaire est placée entre le flan et le gaz sous pression. La découpe pratiquée dans le flan s'étire de manière à minimiser l'amincissement dans la zone en périphérie de la découpe. La feuille secondaire est nécessaire pour appliquer la pression et former les pièces.

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