Laser Welding of Workpieces by Machine

A laser welding machine comprising:

• a workpiece support;
• a laser processing head comprising a laser processing nozzle emitting a laser beam;
• and
• a numerical machine control configured to cause relative movement between a laser beam and a workpiece being welded by the beam, to set the quantity of a process gas per unit of time fed to a processing zone based on a first specified value and, after the stabilization time, during which processing of the workpiece continues with a relative movement between the laser beam and the workpiece, to set the quantity of process gas per unit of time based fed to a processing zone on the second specified value,
• the numerical machine control further configured to, at the start of the processing, set the quantity of process gas per unit of time based on the first specified value and, after the stabilization time, during which processing of the workpiece continues with a relative movement between the laser beam and the workpiece, set the quantity of process gas per unit of time based on the second specified value.