Laser nozzle with internal moving element and external cover, focusing head comprising said nozzle, laser installation comprising said head; laser beam cutting procedure that uses one of the preceding devices

摘要

Laser nozzle comprising: - a nozzle body (1) comprising a first axial housing (5) comprising a first outlet hole (11) located at the level of a front face (1a) of the nozzle body (1), and - a movable element (2) disposed in the first axial housing (5) of the nozzle body (1), which comprises a front part (2a) forming a skirt and an axial passage (4) with a second outlet hole ( 12) which ends at the level of said front part (2a) forming a skirt, and - an elastic element (8) arranged in the first axial housing (5), between the nozzle body (1) and the mobile element (2) ), characterized in that - the mobile element (2) is capable of moving in translation in the first axial housing (5) in the direction of the first outlet orifice (11) under the effect of a gaseous pressure exerted on the mobile element (2), - the elastic element (8) exerts an elastic solicitation force on the mobile element (2) which tends to oppose the translational movement in the first axial housing (5) in the direction of the first exit hole (11), and - an outer cover (13) forms a sleeve around all or part of the body (1) nozzle