| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: laser beam of short-wave laser 1 is directed to reflecting rotary mirror 13, reflecting mirror 14 and, therefrom, into lens 10 on focusing lens 15, and, via central conical nozzle 5, in pulse mode with amplitude equal to thickness of material being cut, into cutting zone 17. Laser annular beam of long-wave laser 2 is directed to reflecting mirror 13 and, therefrom, to focusing lens 10, wherein beam is reflected by annular mirrors 11, 12 and, besides, directed via central conical nozzle 5 into cutting zone 17. Simultaneously, process gas is fed from gas feed system 8 into annular converging-diverging supersonic nozzle 6 with skewed edge 7 at outlet to effuse therefrom onto material being cut. ^ EFFECT: required cutting depth and high surface quality. ^ 3 cl, 2 dwg |
