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Several principles of laser cutting machine

Release Time:2021/02/03 Blog Browsing Times:20

Laser Vaporization Cutting: The use of high energy density of the laser beam heating the workpiece, so that the temperature rise, the material began to vaporize, forming steam. These vapors are ejected at high velocities and form incisions in the material as the vapors are ejected. The heat of vaporization of materials is generally very large, so laser vaporization cutting requires a lot of power and power density. The vaporization cutting of laser cutting machine is mostly used to cut very thin metal materials and non-metal materials (such as paper, cloth, wood, plastic and rubber, etc.).

Laser melting and cutting: When laser melting and cutting, the metal material is melted by laser heating, and then non-oxidizing gas is blown through a nozzle coaxial with the light beam, and the liquid metal is discharged by the strong pressure of the gas to form a cut. Laser melting cutting does not need to vaporize the metal completely, and the energy required is only 1/10 of that of vaporization cutting. Laser cutting machine is mainly used for cutting some non-oxidizable materials or active metals, such as stainless steel, titanium, aluminum and its alloys.

Laser oxygen cutting: laser oxygen cutting principle is similar to the oxyacetylene cutting. It uses laser as preheating heat source and active gas such as oxygen as cutting gas. On the one hand, the blown gas reacts with the cutting metal to generate oxidation reaction and release a large amount of oxidation heat;On the other hand, the molten oxide and melt are blown out of the reaction zone to form cuts in the metal.Because the oxidation reaction in the cutting process produces a large amount of heat, the energy required for laser oxygen cutting is only 1/2 of that for laser melting cutting, and the cutting speed is far greater than that of laser vaporization cutting and laser melting cutting. Laser oxygen cutting is mainly used for carbon steel, titanium steel and heat-treated steel and other easily oxidized metal materials.