Helical cutting of holes in workpieces, involves rotating pulsed laser beam plane of polarization during beam movement so it is always at same angle to linearly machined cut surface

• Main Authors: DAUSINGER, FRIEDRICH, FOEHL, CHRISTIAN, JASPER, KNUT, ABELN, TOBIAS, RADTKE, JOACHIM
• Format: Patent
• Language: English; German
• Published: 29.08.2002
• Edition: 7
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The method involves repeatedly guiding a laser beam in the form of linearly polarized laser pulses with a pulse duration of less than 1 nanosecond along a closed contour of the workpiece and thereby separating the workpiece on a helical cut line. The method involves rotating the plane of polarizatio...