METHOD FOR PRODUCING WORKPIECE PARTS HAVING CHAMFERED CUT EDGES

The invention relates to a method for producing at least one workpiece part (11) and a residual workpiece (10) from a workpiece (9) by means of a laser beam (16) and process gas beam (25) for expelling melt (26), which laser beam and process gas beam are emitted jointly from a nozzle (13) of a laser processing head (2), the method comprising the following method stages: stage I: step a): cutting a portion (15-1, 15-2, 15-3, 15-4, 15-5) of a kerf (15) along a cutting line (14) or cutting a closed kerf (15) along the cutting line (14), wherein a workpiece part-side cut edge (19) is formed on the workpiece part (11) and a residual part-side cut edge (19') is formed on the residual workpiece (10); and step b): creating at least one local recess (27) of the kerf (15) in the residual workpiece (11); stage II: creating a chamfer (21) on the workpiece part-side cut edge (19) on an upper workpiece surface (17) along a modification line (18) while the workpiece part (11) is connected to the residual workpiece (10), wherein (i), in step a) of stage I, at least one corner region (28, 29) of the kerf (15) is created, for which region, in step b) of stage I, a local recess (27) of the kerf (15) is created in the residual workpiece (10) so that the melt (26), resulting from when the chamfer (21) is created in the corner region (28), can be driven through the local recess (27), and/or (ii), for the chamfer (21) created in stage II at the starting point (36) for creating the chamfer (21), which can in particular be located at the kerf beginning (35) of the portion (15-1, 15-2, 15-3, 15-4, 15-5) of the kerf (15), a local recess (27) of the kerf (15) is created in the residual workpiece (10) so that the melt (26), resulting from when the chamfer (21) is created, can be driven through the kerf (15) which is expanded by the local recess (27), and/or (iii), in stage II, the chamfer (21) is formed such that it has a greater depth and/or width in at least a first kerf region (32) than in a directly adjacent second kerf region (33, 33'), wherein a local recess (27) of the kerf (15) is created in the residual workpiece (10) so that the melt (26), resulting from when the chamfer (21) is created in the first kerf region (32), can be driven through the local recess (27).