Method of manufacturing a one-piece tubular doorbeam

Details Method of manufacturing a one-piece tubular doorbeam Method of manufacturing a one-piece tubular doorbeam

B - Operations, Transporting

60

J

B60J 5/04 (2006.01) B21C 37/08 (2006.01) B21C 37/15 (2006.01)

Patent

CA 2415759

A method of rollforming one-piece tubular doorbeams (10). The method includes the steps of drawing a continuous metal strip (20), creating cut-outs (22) in the edges of the strip at spaced locations, rollforming the strip into a tube (30) so that the unindented edges (24) engage one another, welding the engaged edges together, cutting the tube in the areas of the cut-outs (22, 32) to create pre-forms (40), and opening the ends of the pre-forms to create end brackets (16). Additional optional steps provide customization of the end brackets.

L'invention concerne un procédé de profilage de renforts de porte tubulaires monoblocs. Le procédé consiste à étirer une bande métallique continue; à former des encoches dans les bords de la bande à des emplacements espacés; à profiler la bande pour former un tube de sorte que les bords non encochés entrent en prise l'un avec l'autre; à souder ensemble le bords en prise; à découper le tube dans les zones des encoches afin d'obtenir des préformes; et à ouvrir les extrémités des préformes pour créer des goussets. Des étapes supplémentaires facultatives consistent à personnaliser des goussets d'extrémité.

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