Laser cutting machine cutting perforation technology

Laser cutting machine cutting perforation technology: any kind of thermal cutting technology, except a few cases can start on the plate edge, generally must be a small hole on the plate. Earlier in the laser punching compound machine is with a hole punch rushed out of the first, and then begin from the holes by laser cutting. With no stamping device of laser cutting machine has two kinds of the basic ways of perforation: ( 1) Blasting perforation: ( 爆破钻) After continuous laser irradiation, material form a pit in the center, the laser beam and then by coaxial oxygen flow quickly remove the molten material into a hole. General hole size and thickness, half of the average diameter to thickness, blasting perforation for thicker plate blasting perforation aperture is bigger, and do not round, unfavorable use (on demand higher parts Such as oil sieve tube) And can only be used for waste. In addition due to perforation of oxygen to the same pressure and cutting, splash is bigger. （ 2) Pulse perforation: ( 脉冲钻井) Using pulse laser peak power make a small amount of material to melt or vaporize, commonly used as auxiliary air or nitrogen gas, to reduce the make hole expansion with exothermic oxidation, gas pressure is cutting the oxygen pressure is small. Each pulse laser to produce only a small particle injection, gradually thorough, so thick plate punch time takes a few seconds. Once the perforated completion, auxiliary gas into oxygen cutting. This perforation diameter smaller, the perforation quality is better than that of blasting hole. For the use of laser should not only have high output power; Even more important when time and space characteristics of beam of light, so the general crosscurrent CO2 laser can not adapt to the requirements of laser cutting.