Hydroforming die assembly and method for pinch-free tube...

B - Operations – Transporting – 21 – D

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B21D 26/02 (2006.01)

Patent

CA 2264388

A die assembly having die structures that are cooperable to define a die cavity into which a metallic tubular blank can be disposed. A first die structure is moveable to seal the die cavity, and after the die cavity is sealed, the first and second die structures are moveable to reduce the cross- sectional area of the die cavity and thereby deform the metallic tubular blank within the die cavity.

L'invention porte sur un ensemble de matrice ayant des structures de matrice qui fonctionnent solidairement et délimitent une cavité de matrice dans laquelle une ébauche tubulaire métallique peut être disposée. Une première structure de matrice peut être actionnée pour fermer la cavité de matrice. Une fois la cavité de la matrice fermée, les première et deuxième structures de matrice peuvent être actionnées pour réduire l'aire transversale de la cavité de matrice et déformer ainsi l'ébauche tubulaire métallique à l'intérieur de la cavité de matrice.

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