US 7,069,762 B2 · Bending machine

Abstract

The invention concerns a bending machine comprising a machine frame, an upper bar equipped with a tool and a lower bar likewise equipped with a tool, the upper bar and the lower bar being mounted mutually mobile on the frame. The machine comprises at least one drive means for moving the tools of the lower and upper bars towards each other, so as to shape a plate-shaped part to be machined located between said tools. The invention aims at providing that the force exerted by the tools of the lower and upper bars should be the highest possible, at the least possible cost. Therefor, the drive means comprises at least one displacement drive element, to develop an opening and closing movement of the upper bar and the lower bar relative to each other, and at least one force drive element to exert a higher force that that of the displacement drive element, so as to shape the part to be machined which is located between the upper bar tool and the lower bar tool, the displacement drive element being immobilized and locked during the forming operation.

Claims21

Dependent claims

Bending machine comprising

a machine frame,
a bending beam moveable relative to said machine frame for bending a workpiece made from flat material,
an upper beam having an upper beam tool and a lower beam having a lower beam tool, the upper beam and the lower beam being disposed such that they can move relative to one another on the machine frame, and at least one drive for moving the upper beam tool and the lower beam tool toward one another in order to clamp said workpiece made from flat material and located between the two beams during a bending operation by said bending beam, the at least one drive comprising at least one displacement drive for generating an opening and closing movement of the upper beam and the lower beam relative to one another and at least one force drive for generating a greater force than the displacement drive, said force drive being adapted to be used at least in order to cause a deformation of a portion of the workpiece disposed between the upper beam tool and the lower beam tool, said deformation being separate from said bending operation and the displacement drive being stationary and blocked during said deformation.

Dependencies are inferred from the claim text.

Bending machine

Life of this patent

Bending machine

Life of this patent

Abstract

Claims21