Method and forming machine for deforming a hollow workpiece

Details Method and forming machine for deforming a hollow workpiece Method and forming machine for deforming a hollow workpiece

B - Operations, Transporting

21

D

B21D 22/14 (2006.01)

Patent

CA 2416491

The invention relates to a method and a forming apparatus (1) for deforming a hollow tubular workpiece (4), wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, the tool is rotated about an axis of rotation relative to the workpiece and one end of the workpiece is deformed by means of said first tool. A second forming tool is placed into contact with the outer surface of the workpiece and is rotated relative to the workpiece about an axis of rotation. The other end of the workpiece is deformed by means of said second tool and at least one of said tools is moved relative to the workpiece during said deformation and/or between deforming steps (on the same workpiece), wherein the axis of rotation of said tool is translated and/or pivoted about an axis with respect to said workpiece.

La présente invention concerne un procédé et un appareil à former permettant de déformer une pièce tubulaire creuse. La pièce est serrée dans un dispositif de serrage. Un premier outil à former est d'abord mis en contact avec la surface extérieure de la pièce, puis entraîné en rotation par rapport à la pièce autour d'un axe de rotation. Une extrémité de la pièce est alors déformée au moyen dudit premier outil. Un second outil à former est mis en contact avec l'autre surface de la pièce, puis entraîné en rotation autour d'un axe de rotation par rapport à la pièce. L'autre extrémité de la pièce est déformée à l'aide dudit second outil. Au moins l'un des outils est déplacé par rapport à la pièce pendant ladite déformation et/ou entre les opérations de déformation (sur la même pièce); l'axe de rotation dudit outil étant translaté et/ou pivoté autour d'un axe par rapport à ladite pièce.

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