Bent double-walled component, such as an exhaust pipe...

Details Bent double-walled component, such as an exhaust pipe... Bent double-walled component, such as an exhaust pipe...

B - Operations, Transporting

21

C

B21C 37/15 (2006.01) F01N 13/08 (2010.01) B21D 9/15 (2006.01) F16L 9/18 (2006.01)

Patent

CA 2548760

The invention relates to a method for producing a bent double-walled component (10), especially a double-walled pipe, comprising an inner pipe (11) and an outer pipe (12). The inner pipe is at a distance (d) from the outer pipe, creating an intermediate region (13). The inventive method comprises the following steps: the inner pipe (11) and the outer pipe (12) are provided; at least one intermediate part (16) having a thickness corresponding essentially to the distance (d) is either applied to the inner pipe (11) or introduced into the outer pipe (12), filling only part of the intermediate region in the axial direction (I) of the component (10); the inner pipe (11) and the outer pipe (12) are combined to form a composite structure; and the composite structure of the inner pipe (11) and the outer pipe (12) is bent. The invention also relates to a bent double-walled component.

L'invention concerne un procédé de production d'un composant (10) cintré à double paroi, en particulier d'un tuyau à double paroi qui est constitué d'un tuyau intérieur (11) et d'un tuyau extérieur (12), un espace intermédiaire (13), correspondant à la distance (d), séparant ledit tuyau intérieur dudit tuyau extérieur. Le procédé de production de ce tuyau comprend les étapes suivantes: préparation du tuyau intérieur (11) et du tuyau extérieur (12); préparation d'au moins une pièce intermédiaire (16), dont l'épaisseur correspond sensiblement à la distance (d) et qui est placée soit sur le tuyau intérieur (11), soit dans le tuyau extérieur (12), cette pièce intermédiaire (16) ne remplissant qu'une partie de l'espace intermédiaire, dans le sens axial (I) du composant (10); réunion du tuyau intérieur (11) et du tuyau extérieur (12) pour former un assemblage; et cintrage de l'assemblage constitué du tuyau intérieur (11) et du tuyau extérieur (12). L'invention concerne en outre un tel composant cintré à double paroi.

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