Laser cutting machine cutting perforation technology

Each pulse laser to produce only a small particle injection, gradually thorough, so thick plate punch time takes a few seconds. In addition because perforation of oxygen pressure and cutting at the same, splash is bigger.
。 Laser cutting machine for not punching device of laser cutting machine has two kinds of the basic ways of perforation:

blasting perforation: ( Blastdrilling) , after the material by the continuous laser irradiation in the central form a pit, and then by coaxial laser beam with oxygen flow quickly remove the molten material into a hole. General hole size and thickness, half of the uniform blast hole diameter to thickness, so the blasting perforation aperture is bigger, thicker plate and not round, unfavorable use (on demand higher parts Such as oil sieve tube) Can only be used for waste. Theoretically usually change accelerating period of cutting premise: such as focal length, position of nozzle, gas pressure, but in fact, because time is too short to change the above premises is unlikely. Once the perforated completion, auxiliary gas into oxygen cutting immediately. 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.
: (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. This perforation diameter smaller, the perforation quality is better than that of blasting hole. Mainly used in industry to produce realistic change uniform laser power method, the detailed method has the following three: change the pulse width. Change the pulse frequency; Change the pulse width and frequency at the same time.
laser cutting machine for cutting the perforation technology: any kind of thermal cutting technology, besides the minority can begin from the edge of the plate, generally have a small hole on the board. 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. In the case of using pulse perforation, in order to obtain high quality of incision, from workpiece resting pulse perforation to workpiece constant consecutively transition technology should be taken seriously. 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. Practical results show that the effect is good.
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