Laser cutting machine cutting principle

Laser cutting machine adopts peak power of pulse laser 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. Pulse perforation also need to have a reliable pneumatic control system, so as to realize the switch of the gas type, gas pressure and aperture time control. 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. 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. Principle of laser cutting machine, laser cutting is using high power density of laser beam scanning the material surface, heat the material in a very short time to a few thousand to tens of thousands of degrees Celsius, cause the material to melt or gasification, with a high pressure gas will melt or gasification material blown away from the kerf width, achieve the goal of cutting materials.