Laser material processing using focused laser beam guided on workpiece to be processed and optic in laser material processing head, protected with gas flow using nozzle as coaxial jet

摘要

The method is carried out with a system, so that the protective gas (7) in the flow direction of a nozzle duct of a nozzle (5) as a coaxial jet arranged coaxially to the laser beam (3), is guided with comparatively high flow speed for the protection of the optic (6), arranged in the laser material processing head. The protective gas is guided with reduced flow speed against the surface of the workpiece (9), to act as a shield during the welding process.