A lower tool for a bending machine, in particular die bending machine, includes a longitudinally extended base body, which has, on its bottom side, a tool shank for being received in a guide slot of a tool holder and optionally tool shoulders in the transverse direction, and at least one friction reduction device on the bottom side of the base body for reducing a frictional force between the bottom side and the tool holder in the event of a displacement of the lower tool in the longitudinal direction, wherein the at least one friction reduction device is configured such that a weight force of the lower tool acting on the tool holder, while applying a prestressing force in the direction of the weight force, causes a resulting normal force of the lower tool onto the tool holder that is lower relative to the weight force.

A press brake assembly configured to bend a workpiece that includes an upper beam configured to hold an upper punch and a lower beam configured to hold a lower die. A safety latch is disposed within a safety latch cavity of the upper punch, and the upper punch is partially housed within a first cavity of the upper beam. A biasing member is also disposed within the safety latch cavity. A pin extends from a lateral side of the upper punch through the safety latch, and the safety latch is configured to rotate about the pin. The safety latch includes a cam configured to engage the upper beam within a second cavity of the upper beam. The biasing member is configured to bias the cam in a forward direction towards the upper beam cavity to prevent the upper punch from disengaging the upper beam.

A tool for a bending press is described, the tool comprising a safety element to prevent the tool from accidentally falling from a pressing table of the press.

An adapter tool having an attachment section, a body, and a connector. The body is attached to the attachment section and has a punch seat and a clamping space. The connector has a clamping plate that can rotate in relation to the body. The clamping place has an engagement member configured to engage a punch insert. The connector is configured to move between a first position and a second position. In the first position, the engagement member is a first distance from the punch seat. In the second position, at least a portion of the clamping plate resides within the clamping plate space, and the engagement member is located a second distance from the punch seat the connector to the body. The biasing member biases the connector to the first position. The first distance is less than the second distance.

A bending machine for metal sheets includes a punch assembly having an upper tool-holding crosspiece that supports a set of upper bending tools with respective supporting pins and is provided with a guiding groove that is open for receiving the set of upper bending tools. The guiding groove has a lateral supporting groove that receives and supports the supporting pins and maintains the set of upper bending tools slidably coupled to the upper tool-holding crosspiece. The supporting groove has a single second lower opening to allow disengaging/engaging of the supporting pins from/with the supporting groove to remove/insert from/into the upper tool-holding crosspiece at the same time all the upper bending tools. The punch assembly has a single closing element connected to the upper tool-holding crosspiece that is linearly movable between closed and open positions to close and open the second lower opening.

A combination machine for folding and die bending a workpiece includes a lower tool holder configured to releasably receive at least one lower bending tool; an upper tool holder configured to releasably receive at least one upper bending tool and which can be advanced in a straight line in an advancing direction toward the lower tool holder; a pivotable tool holder configured to releasably receive at least one bending tool which is to be pivoted and which can be pivoted relative to the lower tool holder about a pivot axis running perpendicular to the advancing direction of the upper tool holder; and a machine body on which the upper tool holder is arranged. The machine body is configured to absorb bending forces occurring in the advancing direction of the upper tool holder and bending forces occurring during pivoting of the pivotable tool holder depending on the progress of the bending process.

The invention concerns a bending tool (6) with an actuating element (19) accessible outside the tool receptacle, with coupled to it a locking element (20) with a locking catch (21) for securing the bending tool (6) in the tool receptacle. The first end portion (32) of the actuating element (19) has an actuating face (33) arranged on the end side and the second end portion (34) of the actuating element (19) has an actuating recess (35). The invention further concerns a gripping device (14) for manipulating a bending tool (6), comprising a first gripping arm (59) and a second gripping arm (60) displaceable relative to the first gripping arm (59) in the clamping direction (64), said gripping arms (59) being formed to engage in a gripping groove (23, 24) of the bending tool (6) and to clamp the bending tool (6). Also formed is an unlocking member (65) for actuating an actuating element (19) of the bending tool (6), said unlocking member (65) being longitudinally displaceable normally to the clamping direction (64) relative to the gripping arms (59, 60).

The invention relates to a bending press (1) and/or a loading device (2) for loading a bending press (1) with bending tools (5, 6), comprising: at least one tool holder (3, 4; 13, 14) with a rail (7) having an inner profile (8) for receiving and displacing a bending tool (5, 6), at least one internal wall (9) of the rail (7) forming a guide structure (10) extending in the longitudinal direction of the rail (7); and at least one transfer device (15) drivable by a drive (21) for displacing a bending tool (5, 6) within the tool holder (3, 4; 13, 14) and/or between the tool holder (13, 14) of the loading device (2) and a tool holder (3, 4) of a bending press (1), wherein at least one portion of the transfer device (15) is guided by the guide structure (10) formed in the rail (7).

The invention concerns a bending tool (6) with an actuating element (19) accessible outside the tool receptacle, with coupled to it a locking element (20) with a locking catch (21) for securing the bending tool (6) in the tool receptacle. The first end portion (32) of the actuating element (19) has an actuating face (33) arranged on the end side and the second end portion (34) of the actuating element (19) has an actuating recess (35).

The invention further concerns a gripping device (14) for manipulating a bending tool (6), comprising a first gripping arm (59) and a second gripping arm (60) displaceable relative to the first gripping arm (59) in the clamping direction (64), said gripping arms (59) being formed to engage in a gripping groove (23, 24) of the bending tool (6) and to clamp the bending tool (6). Also formed is an unlocking member (65) for actuating an actuating element (19) of the bending tool (6), said unlocking member (65) being longitudinally displaceable normally to the clamping direction (64) relative to the gripping arms (59, 60).

A press brake system that utilizes a punch holder adapted to be used with punch chips of various radii to achieve the desired bend on a part. The system maintains a common shut height enabling the press brake operator to be able to put different radius tip punches next to each other in a single press brake tooling setup.