Four types of laser cutting – With the continuous development of science and technology, laser cutting technology is becoming more and more mature. Today, I will introduce the four types of laser cutting technology.
Laser cutting is currently one of the most popular methods of metal processing. Its principle is to use a focused high-power-density laser beam to irradiate the workpiece to quickly melt, vaporize, ablate or reach the ignition point of the irradiated material. At the same time, it takes advantage of the high-speed coaxial with the beam. The airflow blows away the molten material, thereby realizing the cutting of metal workpieces.
Four types of laser cutting
1.Laser vaporization cutting
Using the high-energy and high-density laser beam to heat the workpiece. Thus the temperature of the cutting material rises rapidly, reaching the boiling point of the material in a short time, skip the melting step and directly start to vaporize to form vapor. While the steam is blowing out, an incision will form in the cut material.
2.Laser melting cutting
The metal material heat and melt due to laser, and inactive gas. Nitrogen blown out through a nozzle coaxial with the beam. And the molten liquid metal discharge by the strong pressure of the gas. The advantage of using laser melting and cutting is that the cutting edge is relatively smooth and general. No need for the secondary processing, higher laser energy requirements and higher gas pressure. Suitable for cutting stainless steel, titanium, aluminum and alloy metals.
3.laser oxygen cutting
The principle of laser oxygen cutting is similar to oxyacetylene cutting. It uses laser as the preheating heat source, and uses active gas such as oxygen as the cutting gas. On the one hand, the sprayed gas oxidizes with the cutting metal and releases a large amount of oxidation heat; on the other hand, the molten oxide and melt are blown out of the reaction zone to form a cut in the metal. The cutting speed is fast, and it is mainly suitable for cutting carbon steel metal materials.
4.laser controlled fracture
Laser-controlled fracture is the use of a relatively small laser power to create a sharp temperature distribution in the groove. So it generates local thermal stress in the brittle material, causing the material to break along the groove. Larger power will cause the surface of the workpiece to melt and destroy the cutting edge.