METHOD FOR OPERATING A DEVICE FOR PROCESSING MATERIAL, AND DEVICE

• Main Authors: BLUG, ANDREAS, ABT, FELIX, NICOLOSI, LEONARDO
• Format: Patent
• Language: English; French; German
• Published: 06.02.2013
• 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 invention relates to a method for operating a device for material processing workpieces by means of lasers (10), in particular a laser welding device, according to which method at least one optical feature characterizing the process is detected by at least one detection means (17) and at least one control parameter (P) for controlling the process energy formula (II) is generated by at least one data processing unit (19) using the control signal formula (I) derived from the optical feature. In order to provide a method for material processing by means of lasers, in which a process control is carried out in a simple manner for preventing negative effects on the processed workpiece (i), said control being stable despite a limited range of values of the control signal formula (I), in the sense that said control return to the process energy formula (II) at any time wherein the feature characterizing the process changes state, and, as long as the process remains near the required process energy formula (II), the control has high quality, according to the invention an optical feature having a transition between at least two states for at least one particular value of the process energy formula (II) is used for the method, and the process energy formula (II) is controlled at a controlled amplitude by considering the history (H) of the control signal formula (I) and/or the control parameter (P) for the method.