Machine for cutting pipes with different cross-sections and diameters by means of a laser beam

Machine for cutting pipes with different cross-sections and different diameters by means of laser beam, comprising a laser source (26) and a system of mirrors for directing the laser beam from said source to a cutting head (7) for focalising said beam on a pipe to be cut through a relevant mirror (Sp5, Sp7′) characterised by the fact that said cutting head is fitted rotating on an arm (3, 34) hinged on a bearing ring (5, 33) said bearing ring being on board a carriage (4, 32) sliding on a system of guide rails that can move parallel to the pipe to be cut, the rotation of the cutting head and of the arm and the movements of the carriage and guide rail system being coordinated by a control unit (25) in such a way that the cutting head always aims the laser beam at right angles with respect to the surface of the pipe to be cut.