Patent ID: 8791386

Claim:
A method for cutting materials using a laser beam generated by a given laser power, which laser beam emerges from a cutting head comprising a cutting nozzle with an inner edge, and is absorbed on a cutting front, the axis of the laser beam being moved along a cutting line with a fixed orientation in a cutting direction of a sheet workpiece, relative to said workpiece, wherein the cutting nozzle is operated with a given gas pressure, the improvement comprising at least one of the following parameter modulating steps: (a) modulating a position (p) of the cutting head with regard to its time averaged value; and (b) modulating the laser power and the gas pressure in the cutting nozzle, wherein the modulation of the gas pressure in the cutting nozzle is carried out such that a mass flow of cutting gas flowing out of the nozzle orifice is modulated substantially in phase opposition to the laser power and to the position of the cutting head.