| 摘要 |
The invention relates to a laser machining head (1), comprising: a focusing lens system (2) for focusing a laser beam (3) onto a machining zone (4) of a workpiece (5) and also a ring die (9), arranged coaxially in relation to the laser beam axis (8), for introducing an auxiliary gas (6) into a region (7) surrounding the machining zone (4). The ring die (9) is mounted on the laser machining head (1) in such a way that it can be moved along the laser beam axis (8) and can be fixed on the laser machining head (1) in different positions along the laser beam axis (8). The invention also relates to a ring die (9) for a laser machining head (1) for introducing an auxiliary gas (6) into a region (7) that surrounds a machining zone (4) of a workpiece (5), comprising: a first ring part, a second ring part, and also an exchangeable ring, which are releasably connected to one another and together bound an annular gas distribution space, wherein an inlet opening that opens out into the gas distribution space is formed on at least one ring part for the connection of a feed for the auxiliary gas (6), and wherein at least one outlet opening (10) for the auxiliary gas (6) is formed on the exchangeable ring. |
