Patent ID: 8404995

Claim:
Machine tool for laser cutting of sheet and pipe materials comprising a support table for the materials, a main cutting unit, a control panel integrated on the machine, remote controlled and managed by a PC, and a laser cutting head, connected to a cooling unit and to a laser generator, which is inserted in the cutting unit and which is moveable over a work table or over a pipe support chuck by means of a numerical control system, characterised in that said laser cutting head is able to emit a laser beam, wherein the active gain medium is a doped optical fibre, in which the optical radiation is generated, and a plurality of single quartz pumping diodes are able to pump the doped ions, Bragg lens or gratings, placed across the laser beam and positioned between said pumping diodes and said materials, being also provided in order to create a laser resonant cavity and optical feedback, said laser cutting head being moved by means of a capacitive sensor of said numerical control system, so that the focal point of said Bragg lens or gratings on the materials is maintained at a constant distance (B) from said materials.