Laser material processing so that focussed laser beam is guided on workpiece to be processed and optic in laser material processing head is protected with help of gas flow and protective

摘要

The method for laser material processing is carried out, so that the protective gas (7) is led in a first region (13) of the nozzle duct to a nozzle (5) as a coaxial jet (7) in a flow direction, for the protection of the optic (6). The protective gas with a reduced vol. flow, is guided against the surface of the workpiece (9), across a second region of the nozzle duct of the nozzle (5) in the flow direction.