Method of manufacturing a bent product and an apparatus and...

B - Operations – Transporting – 21 – D

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B21D 7/00 (2006.01) B21D 5/12 (2006.01) B21D 7/08 (2006.01) B21D 7/16 (2006.01)

Patent

CA 2682815

Provided are a working method and an apparatus for bending a metallic material three-dimensionally. A bending method for bending a metallic material supported by support means, downstream of the support means, while feeding the same from the upstream to the downstream is used to manufacture a bent product having a three-dimensionally bent portion and a hardened portion intermittently. The metallic material is partially heated downstream of the support means by metallic material heating means, and the position of a movable roller die having a plurality of rolls arranged downstream of the heating means for feeding the metallic material heated by the heating means in the axial direction is three-dimensionally changed to bend that portion of the metallic material, which is heated by the heating means, by applying a bending moment to that portion. The portion heated by the heating means is hardened by blowing a cooling medium by cooling means arranged between the heating means and the movable roller die. The metallic material is supported at its portion having left the movable roller die, thereby to suppress the error of the bent product.

La présente invention concerne un procédé de travail et un appareil pour plier tridimensionnellement un matériau métallique. On utilise un procédé de pliage permettant de plier un matériau métallique supporté par des moyens de support, en aval des moyens de support, tout en faisant avancer le matériau métallique de l'amont vers l'aval pour fabriquer un produit plié ayant par intermittence une partie pliée tridimensionnellement et une partie durcie. Le matériau métallique est partiellement chauffé en aval des moyens de support par des moyens de chauffage de matériau métallique et on modifie tridimensionnellement la position d'une filière à rouleaux mobiles qui a une pluralité de rouleaux disposés en aval des moyens de chauffage pour faire avancer le matériau métallique chauffé par les moyens de chauffage dans la direction axiale afin de plier cette partie du matériau métallique qui est chauffée par les moyens de chauffage, en appliquant un moment de pliage à cette partie. La partie chauffée par les moyens de chauffage est durcie par soufflage d'un support de refroidissement disposé entre les moyens de chauffage et la filière à rouleaux mobiles. Le matériau métallique est supporté au niveau de sa partie ayant laissé la filière à rouleaux mobiles pour supprimer, de ce fait, l'erreur du produit plié.

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