Bending machine for rods with resettable folding shank

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 11/12 (2006.01)

Patent

CA 2404162

The invention concerns a digitally controlled machine for bending, forming, or curving a rod, said machine comprising in standard fashion a main frame (1) and a rotating bending head to enable to obtain bends in different planes, wherein said rod (4) is horizontally displaced along a transport axis (5) by a feed station located upstream, and brought through a bending shank (7) borne by the main frame (1), then through a lathe (10) of the bending head, said lathe being formed by a bending roll (8) and folding pin (9), said lathe (10) being capable of rotating in a horizontal plane about an axis of rotation aligned with the axis of the bending roll (8). The invention is characterised in that the bending shank (7) is mounted mobile in translation in the transport axis (5) and continuously displaced between one or more projecting bending positions wherein the shank is proximate to the roll (8) and one or more retracted positions towards upstream completely clearing the bending zone between the lathe and the main frame. The invention is useful for bending, forming and curving raw parts such as rods, wires or profiled sections.

L'invention concerne une machine à commande numérique pour le cambrage, le formage, le pliage ou le cintrage d'une barre, machine comportant classiquement un bâti (1) et une tête de cintrage tournante pour pouvoir obtenir des plis dans diffé-rents plans, machine dans laquelle une barre (4) est déplacée horizontalement selon un axe de défilement (5) par un poste d'amenage situé en amont, et amenée à travers un nez de pliage (7) porté par le bâti (1), puis à travers une tournette (10) de la tête de cintrage, ladite tournette étant formée d'un galet de cintrage (8) et d'un doigt de pliage (9), ladite tournette (10) pouvant tourner dans un plan horizontal autour d'un axe de rotation aligné avec l'axe du galet de cintrage (8), caractérisée en ce que le nez de pliage (7) est monté mobile en translation dans l'axe de défilement (5) et déplacé en continu entre une ou plusieurs positions avancées de cintrage dans laquelle le nez est à proximité du galet (8) et une ou plusieurs positions de retrait vers l'amont dégageant totalement la zone de cintrage entre la tournette et le bâti. Application: cambrage, formage, pliage, cintrage de pièces brutes du types barre, fil profilé. Image

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