Laser cutting machine cutting perforation technology

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.
each pulse laser produce only small particles of injection, gradually thorough, so thick plate punch time takes a few seconds.
: (pulse perforation Pulsedrilling) 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. 。 Mainly used in industrial production change of laser average power method to realistic, concrete method has the following three kinds: change the pulse width; Change the pulse frequency; Change the pulse width and frequency at the same time. Practical results show that the effect is good. This perforation diameter smaller, the perforation quality is better than that of blasting hole.

laser cutting machine for cutting the 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. In the case of using pulse perforation, in order to obtain high quality of incision, from workpiece resting pulse perforation to the transition of workpiece speed continuous cutting technology should take seriously. Once the perforated completion, immediately will be cutting auxiliary gas into oxygen. Laser cutting machine for not punching device of laser cutting machine has two kinds of the basic ways of perforation: laser cutting machine:
blasting perforation Blastdrilling) 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 of the laser cutting machine, 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. 。 For the use of laser should not only have high output power; Laser cutting machine is 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. Pulse perforation also need to have a reliable pneumatic control system, in order to realize the gas species, laser cutting machine, gas pressure switch and punch time control. In theory usually change accelerating period of cutting conditions: such as focal length, position of nozzle, gas pressure, but in fact, due to the time is too short to change the above conditions is unlikely. In addition due to perforation of oxygen to the same pressure and cutting, splash is bigger.

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