Tubular assembly having hydroformed interconnecting member...

Details Tubular assembly having hydroformed interconnecting member... Tubular assembly having hydroformed interconnecting member...

B - Operations, Transporting

21

C

B21C 37/15 (2006.01) B21C 37/16 (2006.01) B21C 37/29 (2006.01) B21D 39/04 (2006.01) B62D 23/00 (2006.01) F16B 17/00 (2006.01) B21D 26/02 (2006.01)

Patent

CA 2400227

A method for forming a hollow part (18) that allows the use of hydroforming in cases where the part interconnects between sections having extreme variations in cross-section. A complete hollow part (18) is formed by joining a hydroformed hollow section with hollow sections. A method for securing a fastener sleeve (102) insert in a pre-fabricated hollow part (100) is also provided. In this method, the hollow part (100) is deformed slightly to form flanges (108) that secure the insert (102) in the part. Once the insert (102) is secure in the hollow part, fasteners can be applied to the part without collapsing it.

La présente invention concerne un procédé de formation de pièce creuse (18) qui permet l'utilisation de l'hydroformage dans les cas où la pièce sert de raccord entre des sections présentant des variations extrêmes dans leur coupe transversale. On forme une pièce creuse complète (18) en unissant une section creuse hydroformée et des sections creuses. L'invention se rapporte également à un procédé permettant de fixer un insert à manchon (102) pour élément de fixation dans une pièce creuse préfabriquée (100). Selon ce procédé, on déforme légèrement la pièce creuse (100) pour former des rabats (108) qui fixent l'insert (102) dans la pièce. Dès que l'insert (102) est fixé dans la pièce creuse, on peut appliquer des éléments de fixation sur la pièce sans qu'elle s'affaisse.

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