The invention relates to a bending press (1) and/or feeding device (2) for feeding a bending press (1) with bending tools (5, 6), comprising: at least one tool holder (3, 4; 13, 14) with a rail (7) comprising an inner profile (8) for receiving and displacing a bending tool (5, 6); and at least one transfer device (15) which can be driven by a drive (21) for displacing a bending tool (5, 6) inside the tool holder (3, 4; 13, 14) and/or between the tool holder (13, 14) of the feeding device (2) and a tool holder (3, 4) of a bending press (1), and the transfer device (15) comprises a releasable coupling (18) for connecting a bending tool (5, 6), said transfer device (15) being guided in the rail (7) of the tool holder (3, 4; 13, 14) and the active area of the coupling (18) is arranged at least partially inside the rail (7).

A locking device for locking tools in a press brake includes a first jaw (2) and a second jaw (3), movable towards and away from each other, and at least one safety hook (4) interposed there between provided with a retaining tooth (41) adapted to be inserted into a groove (52) defined in the shank (51) of a tool (5), wherein on an inner side (35) of the second jaw (3) facing the first jaw (2) there is provided at least one thrust surface (36) adapted to cooperate with, while resting slidingly against, at least one corresponding rest surface (43) on an outer side (42) of the safety hook, the thrust surface (36) and the rest surface (43) lying substantially parallel along a thrust plane (P) sloping in the opposite direction to the first jaw (2) by an angle (α) of between 30° and 60° with respect to a vertical plane.

An attachment base extending in a left-right direction is provided on a lower end side of a front surface of an upper table of a press brake. On the attachment base, a plurality of protruding tabs protruding downward are formed at intervals in the left-right direction. An upper tool holder is disposed between the protruding tabs adjacent to each other in the left-right direction in the front surface of the attachment base. A connecting member is attached to a back surface of each protruding tab, and the connecting member includes a distal end located on a back side of the upper table. A guide member supporting a moving body movably in the left-right direction is coupled to a distal-end face of the connecting member.

A bending system includes a greasing unit configured to move in a right-left direction by way of a moving operation of an external operation member and to supply grease to a sliding contact part of a tool holder, and a greasing unit holder provided on one side in a right-left direction of a table and configured to support the greasing unit. The greasing unit includes a greasing unit main body, and an application member provided on the greasing unit main body and formed in a shape corresponding to the sliding part of the tool holder, the application member being configured to be able to be impregnated with the grease.

The invention relates to a clamping system for a press brake, the clamping system comprising an elongate beam comprising a receiving space for receiving a part of a bending tool, a clamping element, the clamping element being movable between a first position, in which it may engage on the bending tool for clamping it in the receiving space, and a second position for releasing the bending tool, and an actuating member for displacing the clamping element, the actuating member being movable between an active position, in which it urges the clamping element towards the first position, and an inactive position in which it allows the clamping element to move to the second position. The clamping system is characterized by a first biasing member acting on the actuating member for biasing the actuating member towards its inactive position. The invention also relates to a press brake comprising such a clamping system.

There is provided a press brake (1) that, if subjecting a workpiece (90) having non-uniform thickness to bending, can efficiently give uniform curvature to the workpiece (90). The press brake (1) includes: a die (2) supporting the workpiece (90); a punch supporting member (4) arranged so as to be opposed to the die (2); a moving mechanism (5) that moves the punch supporting member (4) relative to the die (2); a punch (3) that is supported by the punch supporting member (4), is opposed to the die (2) or the workpiece (90) in a relative movement direction of the punch supporting member (4), and includes punch elements (3a) lined up in a direction orthogonal to the relative movement direction; and punch element adjusting mechanisms that are disposed so as to correspond to the respective punch elements (3a) and adjusts positions of the punch elements (3a) relative to the punch supporting member (4) in the relative movement direction.

A tool for a press brake includes a tool main body, an attachment portion formed on a base end side of the tool main body and configured to be detachably attached to a tool installation portion of the press brake by using a tool changer, and a bending portion formed on a distal end side of the tool main body and used to bend a plate-shaped workpiece. An engagement hole having a circular cross-sectional shape to be engaged with a bar-shaped finger of the tool changer extends through the tool main body in a thickness direction. An anti-rotation bottomed depressed portion configured to receive a distal end of an anti-rotation member of the tool changer is formed in a vicinity of the engagement hole.

A clamping system for a press brake includes an elongate beam having a receiving space for receiving a part of a bending tool. The elongate beam has at least two cavities formed therein, where each of the at least two cavities has an opening to the exterior of the elongate beam. The at least two cavities are interconnected internally. A press brake includes such a clamping system. A method of manufacturing an elongate beam for such a clamping system includes a step of providing a fluid connection to each of at least two cavities in the elongate beam by interconnecting the at least two cavities by machine from inside at least one of the at least two cavities.

A tool for a press brake includes a tool main body, an attachment portion formed on a base end side of the tool main body and configured to be detachably attached to a tool installation portion of the press brake by using a tool changer, and a bending portion formed on a distal end side of the tool main body and used to bend a plate-shaped workpiece. An engagement hole having a circular cross-sectional shape to be engaged with a bar-shaped finger of the tool changer extends through the tool main body in a thickness direction. An anti-rotation bottomed depressed portion configured to receive a distal end of an anti-rotation member of the tool changer is formed in a vicinity of the engagement hole.

A press brake tool comprises a tool body having a working end configured for operation on a workpiece and a coupling end configured for engagement with a tool holder. The working end is disposed along the tool body, generally opposite the coupling end. One or more magnetic elements can be configured to induce a magnetic coupling for selective engagement and disengagement of the coupling end of the tool body with the tool holder.