Four classification and applications of laser cutting type

Laser cutting machine belongs to one of the hot cutting method. Is the use of the focus of high power density laser beam artifacts, cause the irradiation materials rapidly melting, evaporation and ablation or reach the ignition point, at the same time with the aid of high-speed airflow and beam coaxial blow molten material, so as to realize the workpiece cut open. Laser cutting can be divided into laser cutting, laser vaporization melting oxygen cutting, laser cutting and laser scribing and the control of four types of fracture. 1, laser vaporization cutting with high energy density of laser beam heating workpiece, make temperature rising rapidly, in a very short period of time to reach the boiling point of material, material begins to boil, to form steam. The steam jet velocity is large, at the same time of steam jet, form the incision on the material. Material heat of vaporization are large, so the laser vaporization takes a lot of cutting the power and power density. Laser vaporization cutting for extremely thin metal materials and nonmetal materials ( Such as paper, cloth, wood, plastic and rubber, etc. ) The cutting.
2, laser fusion cutting laser fusion cutting, laser heating melt metal materials, and then through the nozzle with beam coaxial gas blowing the oxidation ( Ar, He, N, etc. ) , rely on the strong pressure of the gas liquid metal, form the incision. Laser fusion cutting does not need to make the metal completely vaporized, the energy is only about 1/10 of the vaporization cutting. Laser fusion cutting is mainly used for materials or some not easy oxidation of active metal cutting, such as stainless steel, titanium, aluminum and its alloy, etc. 3, oxygen cutting laser oxygen cutting principle similar to the oxyacetylene cutting. It is to use laser for preheating of heat, oxygen reactive gas, such as cutting gas. Blowing out of gas on the one hand and cut metal effect, oxidation reaction, release a large amount of heat oxidation; On the other hand the molten oxide and melt blowing out from the reaction zone, form the incision in the metal. Due to oxidation produced a large amount of heat in the process of cutting, so the energy needed to power a laser oxygen cutting just melt cutting 1/2, and cutting speed is more than laser vaporization cutting and melting cutting. Laser oxygen cutting is mainly used for carbon steel, titanium steel and heat treatment of steel and other easy oxidation of metal materials. 4, fracture laser scribing laser scribing and control is the use of high energy density of laser scanning on the surface of brittle material, make the material vaporized out a small slot, and then a certain pressure, brittle material will be split along the small slot. Laser scribing laser with generally for the Q switch laser and CO2 laser.