| 摘要 |
PROBLEM TO BE SOLVED: To obtain a laser cutting device improving efficiency in the case of cutting a shaped thick steep stock with a low output of laser beam by dispersing laser beams so that one spectral beam is provided with deeper depth of focus than the other spectral beam. SOLUTION: The cutting device of materials to be worked is provided with a optical means 4 arranged in a single cutting head 6 so as to disperse laser energy beams into two separate beams 8 and 10. The cutting head 6 is provided with an inlet 16 of compressed oxygen and a nozzle 14 for an outlet of oxygen. At least one spectral beam 8 is focused on the upper position than the surface of materials to be worked. In the case of using, the surface area of materials to be worked where the spectral beam 8 collides is specified to be larger than the surface area of materials to be worked where oxygen collides at the time of leaving from the nozzle 14. |
