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.