用于激光切割的喷嘴技术领域本发明涉及一种用于激光切割的喷嘴，其包括具有轴向壳体（5）和位于喷嘴主体（1）的前表面（1a）处的第一出口孔（11）的喷嘴主体（1）。 （1）的轴向壳体（5）中的可动构件（2），所述可动构件包括形成裙部并包括第二出口孔（12）的前部（2a），所述可动构件（2） 适于在施加在所述可移动元件（2）上的气体压力的作用下在所述轴向壳体（5）中在所述第一出口（11）的方向上平移，直到所述部件 形成活动元件（2）的裙部的前部（2a）通过第一出口（11）突出到轴向壳体（5）的外部，并且弹性元件（8）布置在轴向壳体 （5）之间，在喷嘴体（1）和可动件（2）之间对可动件（2）施加弹性恢复力。 根据本发明，前部（2a）包括其外径朝第二出口孔（12）逐渐减小的端部（17）。 聚焦头和相关的激光切割设备。 使用根据本发明的喷嘴，根据本发明的激光聚焦头或根据本发明的设备的激光束切割方法。

The invention relates to a nozzle for laser cutting comprising a body (1) nozzle comprising an axial housing (5) and a first outlet (11) located at the front face (1a) of the nozzle body (1) a movable member (2) arranged in the axial housing (5) of the nozzle body (1), comprising a front portion (2a) forming a skirt and comprising a second outlet port (12), said movable element (2) being capable of moving in translation in the axial housing (5) towards the first outlet (11) under the effect of gas pressure exerted on the movable member (2) until the part before (2a) forming a skirt of the movable member (2) comes to protrude outside of the axial housing (5) through the first outlet (11), and an elastic member (8) arranged in the axial housing (5) between the nozzle body (1) and the movable element (2) exerting an elastic return force on the movable member (2). According to the invention the front portion (2a) comprises an end portion (17) whose outer diameter gradually decreases towards the second outlet port (12). Focusing head and installation of associated laser cutting. A method of cutting by laser beam utilizing a nozzle according to the invention, a laser focusing head according to the invention or a plant according to the invention.