| 摘要 |
The invention relates to a laser nozzle (1), in particular a nozzle (1) for laser cutting, which includes a central conduit (2) extending axially through the nozzle (1) and including a cylindrical inner downstream portion (21) with a first outlet opening (22) having a diameter (D), and a peripheral conduit (3) extending around the central conduit (2) and including an inner downstream chamber (31) with a second annular outlet opening (32), said second outlet opening (32) having, in a radial direction, a first passage width (E1). According to the invention, the inner downstream portion (21) of the central conduit (2) has a first length (L1) where L1 > 3 x D, and the inner downstream chamber (31) of the peripheral conduit (3) has a second length (L2) where L2 > 8 x E1. A plurality of inner passages (4) are arranged within the nozzle (1), around the central conduit (2). The peripheral conduit (3) includes an intermediate chamber (30) arranged between the inner passages (4) and the inner downstream chamber (31), said intermediate chamber (30) extending around the central conduit (2). The invention also relates to an associated laser head and facility. The invention further relates to a laser cutting method using such a nozzle. |
