Abstract: A cutting device for cutting flat material, such as sheet metal, is disclosed. The cutting device includes a knife shaft to which at least one circular knife can be fastened and a positing device. The positioning device is configured to move the at least one circular knife in a released state along a longitudinal axis of the knife shaft and to fix it in a predetermined position on the knife shaft in a reversible and force-transmitting manner, wherein the positioning device has at least one effector configured to actuate a clamping means of the at least one circular knife. The cutting device is further characterized in that to actuate the clamping means, the effector is movable along an axis of movement that is skewed with respect to the longitudinal axis of the knife shaft.

Abstract: A method for producing a seam on a workpiece made of flat material using a bending machine is disclosed. The bending machine comprises a first clamping jaw, a second clamping jaw that is mounted movably relative to the first clamping jaw and configured to clamp, together with the first clamping jaw, the workpiece, and a bending unit that is arranged on one of the clamping jaws and has a bending tool, the bending unit being configured to bend a portion of the workpiece by moving the bending tool relative to the associated clamping jaw to form a fold. The method comprises producing a pre-seam on the workpiece, comprising forming a first fold, and closing the pre-seam to form a seam by closing the first fold with the bending unit in a state in which the other of the clamping jaws is spaced from the seam.

Abstract: A machining device for cutting and punching flat material, such as sheet metal, is disclosed. A base includes a support table for the flat material. The base defines a feed direction in which the flat material is configured to be fed into the machining device. A first cutting device is configured to cut the flat material transversely to the feed direction. A second cutting device is configured to cut the flat material in the feed direction. A separative machining unit is configured to be displaceable in the machining device relative to the base transversely to the feed direction. The separative machining unit is configured to subject the flat material to separative machining in sections.

Abstract: A method for producing a seam on a workpiece made of flat material using a bending machine is disclosed. The bending machine comprises a first clamping jaw, a second clamping jaw that is mounted movably relative to the first clamping jaw and configured to clamp, together with the first clamping jaw, the workpiece in a clamping plane, and a bending unit that is arranged on one of the clamping jaws and has a bending tool, the bending unit being configured to bend a portion of the workpiece by moving the bending tool relative to the associated clamping jaw to form a fold. The method comprises producing a pre-seam on the workpiece such that it is located in an area in front of the clamping jaws, comprising forming a fold, wherein the pre-seam extends at an angle relative to the clamping plane, and changing the angle by displacing the bending tool.

Abstract: A method for producing a recess in a workpiece made of flat material using a bending machine is disclosed. The bending machine comprises a first clamping jaw, a movable second clamping jaw configured to clamp, together with the first clamping jaw, the workpiece, a first bending unit arranged on the first clamping jaw having a first bending tool, and a second bending unit arranged on the second clamping jaw having a second bending tool. The method comprises clamping the workpiece with the clamping jaws such that a protruding portion of the workpiece protrudes from the clamping jaws, moving one of the two bending tools into a counteraction position such that it rests against the protruding portion at a distance from the clamping jaws, and extending the other bending tool such that it presses against the workpiece so that a recess is formed in the workpiece.

Abstract: An arcuate cutting tool part for a machining device for cutting flat material, such as sheet metal, is disclosed. The arcuate cutting tool part comprises a radially outer cutting edge area having at least one first arcuate cutting edge, an attachment arrangement for attachment to the machining device, a first coupling arrangement having a first coupling portion, and a second coupling arrangement having a second coupling portion, wherein the arcuate cutting tool part defines a circumferential direction in accordance with the arcuate shape, and wherein the first and/or the second coupling arrangements are configured to be releasably coupled to at least one further arcuate cutting tool part in the circumferential direction.

Abstract: A bending machine, in particular a swivel bending machine, is provided that defines a safety-relevant work area in which an operator of the bending machine is present during its operation, loading, unloading or the like, having a safety module comprising a safety barrier which provides a variable-size shield for the safety-relevant work area such that a shut-off state and an access state can be generated, wherein in the shut-off state access to the safety-relevant work area is at least partially restricted and wherein in the access state access to the safety-relevant work area is at least partially granted. A method is provided for processing a workpiece by means of a bending machine.