PROCEDURE FOR CLEANING OF ALUMINIUM SURFACES AND DETERMINATION OF THE DEGREE OF CLEANING

• Main Authors: Siewert, Erwan, Fehrenbach, Lukas, Hussary, Nakhleh A
• Format: Patent
• Language: English; French; German
• Published: 09.11.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CLEANING; CLEANING IN GENERAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PREVENTION OF FOULING IN GENERAL; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The present invention relates to a method for cleaning of a surface (8a) of at least one workpiece (8) made out of an aluminium alloy, comprising the steps of: generating an electric arc (3) or a plasma jet (3) by means of a torch (2), applying the electric arc (3) or the plasma jet (3) to the surface (8a), and moving the torch (2) and the at least one workpiece (8) relative to one another to clean the surface (8a) by evaporating impurities (9) of the surface (8a) using the electric arc (3) or plasma jet (3), and e.g. detecting light (L) coming from the electric arc (3) or plasma jet (3) by means of an optical sensor (4), wherein the optical sensor (4) generates an output signal indicative of the presence of impurities (9) of the surface (8a) evaporated by the electric arc (3) or by the plasma jet (3).