The invention relates to a method for compensating deviations in a deforming operation between two beams of a press, comprising of arranging one or more compensating element at a suitably chosen location in the press, detecting the deviations and moving the compensating element(s) relative to the beams by (electro) mechanical means during the deforming operation such that the detected deviations are compensated. The compensating elements can be moved here to an over-compensating position prior to the deforming operation and pressed out of their over-compensating position during the operation by the load on the beam, wherein each compensating element exerts an adjustable resistance force on surrounding parts of the press. It is conversely possible for the compensating elements each to be pressed stepwise to a position compensating the detected deviations during the deforming operation. It is possible to use (piezoelectric) actuators to exert the resistance force and/or to move the compensating elements. The invention further relates to a device with which this compensation method can be performed.

The present application describes a system to compensate deformations in press bending machines, in particular press bending machines used for plate conformation or bending, which comprises a group of uprights (1) for supporting the upper apron (7) of the press bending machine, wherein each upright (1) comprises two beams (2,3) placed on the upper and lower ends of a pillar (4) being coupled thereof by means of fastening means (5) and a compensation actuator (6) placed between the beams (2,3) and coupled to the beam (3) at one end thereof. The presented technology allows to increase the distance between the aprons of the press bending machine and the upright scye (1) so that said press bending machine allow the plate deformation in various shapes and dimensions.

The invention relates to a method for compensating deviations in a deforming operation between two beams of a press, comprising of arranging one or more compensating element at a suitably chosen location in the press, detecting the deviations and moving the compensating element(s) relative to the beams by (electro) mechanical means during the deforming operation such that the detected deviations are compensated. The compensating elements can be moved here to an over-compensating position prior to the deforming operation and pressed out of their over-compensating position during the operation by the load on the beam, wherein each compensating element exerts an adjustable resistance force on surrounding parts of the press. The compensating elements each can be pressed stepwise to a position compensating the detected deviations during the deforming operation. Piezoelectric actuators can be used to exert the resistance force and/or to move the compensating elements.

A frame structure includes a C-shaped frame having a front side that opens in a forward and rearward direction among the forward and rearward direction, a leftward and rightward direction and an upward and downward direction, which are perpendicular to each other, an upper action section supported by an upper front portion of the C-shaped frame, and a lower action section supported by a lower front portion of the C-shaped frame, wherein, when a reaction force is applied through the upper action section, the C-shaped frame is deformed such that a displacement of the upper action section in the forward and rearward direction, which occurs according to an elastic deformation of the C-shaped frame, is canceled out and such that a displacement of a pivotal movement about a leftward and rightward direction axis of the upper action section is canceled out.

A tie bar tensioning system that allows a bending machine operator to removably couple an upper end of a bend die post of the bending machine to a base of the bending machine via a tie bar, and to lock the tie bar in a tensioned position. The tensioning system includes a stationary member and a rotatable member, each with aligned tie bar passages for receiving the one end of the tie bar. Both the stationary member and the rotatable member include respective engagement surfaces, with the rotatable member engagement surface being rotatable relative to the stationary member engagement surface between a released position and a tensioned position whereat the rotatable member is selectively lockable. The rotation of the rotatable member with the stationary engagement surface in engagement with the stationary engagement surface longitudinally displacing the rotatable member relative to the stationary member.

A frame structure includes a C-shaped frame having a front side that opens in a forward and rearward direction among the forward and rearward direction, a leftward and rightward direction and an upward and downward direction, which are perpendicular to each other, an upper action section supported by an upper front portion of the C-shaped frame, and a lower action section supported by a lower front portion of the C-shaped frame, wherein, when a reaction force is applied through the upper action section, the C-shaped frame is deformed such that a displacement of the upper action section in the forward and rearward direction, which occurs according to an elastic deformation of the C-shaped frame, is canceled out and such that a displacement of a pivotal movement about a leftward and rightward direction axis of the upper action section is canceled out.

Two press brake machines each using a single, central hydraulic actuator are provided. The press brake machines are configured to operate separately or in tandem, depending upon a size of a sheet metal workpiece to be deformed. A locking device that may include an upper connecting block and a lower connecting block is provided on each of the at least two press brake machines to allow the machines to interlock when the machines are adjacent to one another and are operating in tandem. The upper connecting block may be L shaped to help provide the interlocking. Interlocking of the press brake machines during tandem operation helps prevent distortion that can occur in the upper and lower portions of the ram due to the press brake machine's use of a single, central hydraulic actuator.

The invention relates to a method for compensating deviations in a deforming operation between two beams of a press, comprising of arranging one or more compensating element at a suitably chosen location in the press, detecting the deviations and moving the compensating element(s) relative to the beams by (electro) mechanical means during the deforming operation such that the detected deviations are compensated.

The compensating elements can be moved here to an over-compensating position prior to the deforming operation and pressed out of their over-compensating position during the operation by the load on the beam, wherein each compensating element exerts an adjustable resistance force on surrounding parts of the press.

It is conversely possible for the compensating elements each to be pressed stepwise to a position compensating the detected deviations during the deforming operation.

It is possible to use (piezoelectric) actuators to exert the resistance force and/or to move the compensating elements.

The invention further relates to a device with which this compensation method can be performed.