Folded-seam connection, method of producing it and device

Details Folded-seam connection, method of producing it and device Folded-seam connection, method of producing it and device

B - Operations, Transporting

21

D

B21D 19/04 (2006.01) B21D 39/02 (2006.01) B21D 39/04 (2006.01)

Patent

CA 2432135

In ventilation and air-conditioning technology, so-called spiral pipes have to be joined together in a tightly sealed manner at widely differing angles, which is generally carried out by segment bends and pipe sections. An improved, durable seal of folded-seam connections is achieved by a flange-like double fold (1) which is arranged at a first pipe end (X) and which is surrounded on the outside at least in part with positive locking and with a continuous metal seal, by a second double fold (2) at the second pipe end (Y). The subject of the invention also extends to an economic method of producing the flange-like double fold (1) as well as to a device suitable therefore for performing the method.

Dans le domaine de la technologie de la ventilation et de la climatisation, lesdits conduits en spirale doivent être joints dans un scellement étroit à des angles largement différents. En général, on obtient un tel résultat grâce à des coudes de segment et des sections de conduits. Une connexion améliorée, résistante, à scellement de jointure pliée est réalisée grâce à un pli double en forme d'aile (1) disposée à une première extrémité de conduit (X) et entourée à l'extérieur, au moins en partie, d'un verrouillage positif et d'un sceau métallique permanent, par un second pli double (2) à la seconde extrémité de conduit (Y). L'invention concerne également un procédé économique de production d'un pli double en forme d'aile (1) ainsi qu'un appareil adapté pour réaliser ce procédé.

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