A sheet-metal bending press

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 5/04 (2006.01)

Patent

CA 2285549

Guide means interposed between a blade-holder (20) and the frame (12) of a bending press comprise a slide (40) slidable along an axis (Z) perpendicular to the plane of the metal sheet (P) to be bent. The blade-holder (20) is coupled to the slide (40) so as to be slidable along an axis inclined to a plane perpendicular to the plane of the sheet (P). First means (38) for bringing about movements of the blade-holder (20) along the axis perpendicular to the plane of the sheet (P) are interposed between the frame (12) and the blade-holder (20). Second means for bringing about movements of the slide (40) along the inclined axis are interposed between the slide (40) and the blade-holder (20) in order to produce movements of the blade-holder (20) towards and away from the blank-holder (16, 18), parallel to the plane of the sheet (P). These movements can be brought about in preselected combinations, preferably under the control of a numerical-control device.

L'invention concerne une presse à cintrer dans laquelle des éléments de guidage intercalés entre un porte-lames (20) et le châssis (12) de la presse à cintrer comprennent un coulisseau (40) pouvant coulisser le long d'un axe (Z) perpendiculaire au plan de la feuille métallique (P) à cintrer. Le porte-lames (20) est couplé au coulisseau (40) de façon à pouvoir coulisser le long d'un axe incliné vers un plan perpendiculaire au plan de la feuille (P). Des premiers éléments (38) pour provoquer des mouvements du porte-lames (20) le long de l'axe perpendiculaire au plan de la feuille (P) sont intercalés entre le châssis (12) et le porte-lames (20). Des seconds éléments entraînant des mouvements du coulisseau (40) le long de l'axe incliné sont intercalés entre le coulisseau (40) et le porte-lames (20) afin de produire des mouvements du porte-lames (20) en direction et en provenance du serre-tôle (16, 18), parallèlement au plan de la feuille (P). On peut provoquer ces mouvements dans des combinaisons présélectionnées, de préférence sous la commande d'un appareil à commande numérique.

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