Device and method for forming, in particular cold-forming,...

B - Operations – Transporting – 21 – C

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B21C 23/00 (2006.01) B21C 31/00 (2006.01)

Patent

CA 2301037

Described is an apparatus for the cold-forming, in particular for the cold extrusion of a workpiece, which has a die (3) and a feeding device (5) by means of which a relative motion can be produced between the workpiece (2) and the die (3). It is provided that the apparatus (1; 1') has a frequency generating device (10) working together with the feeding device (5) by means of which the relative motion between workpiece (2) and die (3), produced by the feeding device (5), can be modulated in such a way that after a forward stroke, in which the workpiece (2) and/or the die (3) is moved a first stroke length in the direction of feed (P), in a subsequent reverse stroke, a movement of the die (3) and/or of the workpiece (2) by a second stroke length can be carried out in a direction contrary to the direction of feed (P).

L'invention concerne un dispositif pour le formage à froid, notamment pour le matriçage à froid d'une pièce. Ce dispositif comporte une matrice de formage (3) et un système d'avance (5) permettant de produire un mouvement relatif entre la pièce (2) et la matrice de formage (3). Le dispositif (1; 1') comprend un système de génération de fréquences (10) coopérant avec le système d'avance (5) et permettant de moduler le mouvement relatif entre la pièce (2) et la matrice de formage (3) produit par le système d'avance (5), de telle manière qu'après une course d'avance, lors de laquelle la pièce (2) et/ou alors la matrice de formage (3) parcourent dans le sens d'avance P une première trajectoire de course, un mouvement de la matrice de formage (3) et/ou de la pièce (2) puisse s'effectuer sur une deuxième trajectoire de course, lors d'une course de retour consécutive, dans un sens opposé au sens d'avance P.

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