With the rapid development of the industrial market, the fiber laser cutting machine, as an indispensable machine for metal sheet cutting, has now become an indispensable machine for all factories. Many customers do not understand the mode of metal laser cutting machine when purchasing laser cutting machines. Cause some interference, this article tells you the cutting mode of the metal laser cutting machine.
There are four industrial modes of metal laser cutting machine, vaporization cutting, melting cutting, oxidation melting cutting, and controlled fracture cutting. Now I will explain to you separately.
Under the heating of the high-power density laser beam, the surface temperature of the material rises to the boiling point temperature very fast, enough to avoid melting caused by heat conduction, so part of the material vaporizes into steam and disappears, and part of the material is sprayed from the bottom of the slit by auxiliary gas The flow blows away. To
When the power density of the incident laser beam exceeds a certain value, the inside of the material at the point where the beam is irradiated begins to evaporate, forming holes. Once this small hole is formed, it will act as a black body to absorb all the incident beam energy. The small hole is surrounded by the molten metal wall, and then the auxiliary airflow coaxial with the beam takes away the molten material around the hole. As the workpiece moves, the small hole moves synchronously in the cutting direction to form a slit. The laser beam continues to irradiate along the leading edge of this slit, and the molten material is continuously or pulsatingly blown away from the slit. To
Oxidation melting cutting
Melting and cutting generally use inert gas. If it is replaced by oxygen or other active gases, the material is ignited under the irradiation of a laser beam, and a fierce chemical reaction with oxygen generates another heat source, which is called oxidative melting and cutting. To
Control fracture cutting
For brittle materials that are easily damaged by heat, high-speed and controllable cutting is performed by laser beam heating, which is called controlled fracture cutting.
The main content of this cutting process is: the laser beam heats a small area of the brittle material, causing a large thermal gradient and severe mechanical deformation in this area, leading to the formation of cracks in the material. As long as a uniform heating gradient is maintained, the laser beam can guide cracks in any desired direction.