FIELD: laser engineering.
SUBSTANCE: invention can be used in laser cutting, in particular, using a fibre or disc laser. Nozzle (1) housing is made with axial cavity (5), having first outlet hole (11) on front side (1a). Movable element (2) is configured for translational movement in axial cavity (5) in direction of first outlet hole (11) under pressure of gas until front part (2a), forming inner cylindrical wall of movable element (2), does not protrude from axial cavity (5) through first outlet hole (11). Elastic element (8) is located in axial cavity (5) between nozzle housing (1) and movable element (2).
EFFECT: elastic element (8) generates elastic return force to movable element (2) and tends to counteract translational movement in axial cavity (5) in direction of first outlet hole (11).
11 cl, 4 dwg
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