| 摘要 |
The invention relates to a laser nozzle (1, 2) that can be used in laser cutting, notably with a fibre or disc laser, comprising a nozzle body (1) comprising an axial housing (5) passing axially through said nozzle body (1) and comprising a first outlet orifice (11) situated at the front face (1a) of the nozzle body (1), and a mobile element (2) comprising a skirt-forming front part (2a) arranged in the axial housing (5) of the nozzle body (1), said mobile element (2) being capable of translational movement in the axial housing (5) of the nozzle body (1) and comprising an axial passage (4) with a second outlet orifice (12) opening onto the skirt-forming front part (2a). According to the invention, the mobile element (2) is able to move translationally in the axial housing (5) in the direction of the first outlet orifice (11) under the effect of a gas pressure applied to the mobile element (2) until such point as the skirt-forming front part (2a) of the mobile element (2) projects out from the axial housing (5) through the first outlet orifice (11) of the front face (1a) of the nozzle body (1), and an elastic element (8) is arranged in the axial housing (5), between the nozzle body (1) and the mobile element (2), said elastic element (8) applying an elastic return force to the mobile element (2) that tends to oppose the translational movement in the axial housing (5) in the direction of the first outlet orifice (11). |
