Method for laser cutting of metallic workpiece by pulsed/continuously processed laser beam under use of auxiliary layers of solid/fluid auxiliary materials, comprises arranging the auxiliary layer on part surface turned to the laser beam

摘要

The method for laser cutting of a metallic workpiece (1) by a pulsed or continuously processed laser beam (3) under use of auxiliary layers (2) of a solid or fluid auxiliary materials that are easily volatile than the material of the workpiece, comprises arranging the auxiliary layer on a part surface turned to the laser beam and selecting a laser beam power, focusing diameter and a cut feed of the laser beam in such a way that a pressure expansion of the auxiliary material is produced for expelling 80% of the melt from the cutting gap in influencing area of the laser beam. The method for laser cutting of a metallic workpiece (1) by a pulsed or continuously processed laser beam (3) under use of auxiliary layers (2) of a solid or fluid auxiliary materials that are easily volatile than the material of the workpiece, comprises arranging the auxiliary layer on a part surface turned to the laser beam and selecting a laser beam power, focusing diameter and a cut feed of the laser beam in such a way that a pressure expansion of the auxiliary material is produced for expelling 80% of the melt from the cutting gap in influencing area of the laser beam during the evaporation phase, and a volume of the auxiliary material is subjected in an overcritical condition. The auxiliary layer comprises a main layer and an intermediate layer arranged between the part surfaces of the workpiece. The intermediate layer consists of a material, whose evaporation temperature lies below the melting temperature of the material of the main layer. The laser beam power, the focusing diameter and the cut feed are selected in such a way that a volume of the intermediate layer between the main layer and the part surface of the workpiece is subjected in an overcritical condition in influential area of the laser beam. Zinc material is used as auxiliary material. The zinc material is subjected by an alloy-hot dip coating method on the part surface of the workpiece. A main layer is formed from zinc and intermediate layer is formed from an alloy component. The zinc material is electrolytically applied on the part surface of the workpiece. Aluminum-silicon-alloy is used as auxiliary material. A fluid is used as auxiliary material. An independent claim is included for a laser cutting device with device for producing a laser beam.