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).

On a back side of a table, moving bodies are provided being movable in a left-right direction. A bending system includes moving actuators to cause the moving bodies to move in the left-right direction relative to the table and position detectors to detect positions of the moving bodies in the left-right direction. The moving bodies are provided with hole detectors to detect the engagement holes tools fitted to a tool holder. The bending system includes a hole position acquisition unit to acquire positions of the engagement holes of the tools in the left-right direction, based on positions of the moving bodies in the left-right direction at the time of the engagement holes of the tools being detected.

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.

In a case where a vacant space exists on only one side in a holder area of a stocker positioned at an exchange position, a first upper tool exchange unit is first moved in the left-right direction, and located in the vicinity of the vacant space. Next, the first upper tool exchange unit is moved forward and thereafter moved to the left, so that a tool retention member of the first upper tool exchange unit is brought into contact with one side surface of a tool. Then, under the contact state, the first upper tool exchange unit is moved to the right until the other side surface of the tool abuts on a stopper.

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 bending tool storage device (1) for storing bending tools (2), comprising: a preferably shelf-type rack (3) on which a plurality of storage locations (4) for bending tools (2) are arranged, at least one supply path (10), preferably in the form of a tool guide (11), for issuing and/or retrieving bending tools (2), and at least one first transfer device (5) for transferring bending tools (2) between the storage locations (4) and a transfer point (6), characterized in that the bending tool storage device (1) comprises, between the transfer point (6) and the supply path (10), a rotating installation (7) for rotating the bending tools (2).

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 bending machine for metal sheets includes a punch arrangement that supports a set of upper bending tools, a die arrangement that supports at least one set of lower bending tools, a tool magazine of bending tools, a replacing apparatus arranged to take bending tools from the tool magazine and mount them on the punch arrangement and/or the die arrangement and vice versa, and a gripping device configured to simultaneously clasp and move a whole set of bending tools. The tool magazine comprises a plurality of supporting guides that house respective sets of bending tools and a transfer carriage arranged to house a set of bending tools and movable between an exchange position to receive from, or provide to, the gripping device a set of bending tools and a plurality of loading positions to transfer to, or receive from, a supporting guide a set of bending tools.

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.

The invention relates to a device for changing bending tools (15, 16) in a bending machine (2) for bending metal sheets, in particular in a press brake, comprising at least one tool magazine (6) for storing the bending tools (15, 16), which, when positioned in a working area of the bending machine (2), cause the metal sheets to bend. The at least one tool magazine (6) is arranged on a frame (3) which is configured to be positioned in a free-standing manner without a mechanical connection to the bending machine (2) in an operating position of the device (1), wherein the at least one tool magazine (6) can be moved from a first position out of the frame (3) into a second position, in which at least a part of the tool magazine (6) that can be moved out lies in a contact-free manner within the bending machine (2).