XT Laser-metal laser cutting machine
Metal laser cutting machine is a kind of optical fiber laser cutting machine specially used for cutting metal plates/pipes. Its main features are the non-contact processing of laser, fast speed, good cutting effect and high efficiency. Now metal laser cutting machine is widely used in metal material cutting in all walks of life. Metal laser cutting machine is a kind of automatic typesetting machine equipment, which can save a lot of materials, and the material cut by metal laser cutting machine is very flat, and its cut is very smooth. The price of metal laser cutting machine is not cheap, and the general price is measured in ten thousand, but this kind of equipment can reduce the processing cost during the operation.
Do you know what laser is in laser cutting machine. Laser is a kind of beam with very strong release ability. Laser can achieve extremely fast cutting in a very short time. The metal cutting machine can save labor and time. Do you know the principle of metal laser cutting machine. Let’s take a look at the principle of metal laser cutting machine.
Laser cutting is to use a focused high power density laser beam to irradiate the workpiece, so that the irradiated material can rapidly melt, vaporize, ablate or reach the ignition point. At the same time, the workpiece can be cut off by using the high-speed air flow coaxial with the beam to blow away the molten material. Laser cutting belongs to the classification of thermal cutting methods. Laser cutting can be divided into four categories: laser vaporization cutting, laser melting cutting, laser oxygen cutting and laser scribing and controlled fracture.
1) Laser vaporization cutting uses a high energy density laser beam to heat the workpiece, making the temperature rise rapidly, reaching the boiling point of the material in a very short time, and the material begins to vaporize and form steam. The steam spews out at a high speed, and at the same time, it forms a notch on the material. The heat of vaporization of materials is generally large, so laser vaporization cutting requires a large power and power density.
Laser vaporization cutting is mostly used for cutting extremely thin metal materials.
2) Laser melting cutting When laser melting cutting, the metal material is melted by laser heating, and then non-oxidizing gases (Ar, He, N, etc.) are sprayed through the nozzle coaxial with the beam, and the liquid metal is discharged to form a cut by the strong pressure of the gas. Laser melting cutting does not need to completely vaporize the metal. The required energy is only 1/1 of that of vaporization cutting. Laser melting cutting is mainly used for the cutting of some non-oxidizable materials or active metals, such as stainless steel, titanium, aluminum and their alloys.
3) The principle of laser oxygen cutting is similar to oxyacetylene cutting. It uses laser as preheating heat source and oxygen and other active gases as cutting gas. On the one hand, the injected gas acts with the cutting metal, and the oxidation reaction releases a large amount of oxidation heat. On the other hand, molten oxides and molten substances are blown out of the reaction zone to form a notch 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 melting cutting, and the cutting intensity is far greater than that of laser vaporization cutting and melting cutting.
Laser oxygen cutting is mainly used for carbon steel, titanium steel, heat treatment steel and other easily oxidized metal materials.
4) Laser scribing and control fracture.
Laser scribing is to use a high energy density laser to scan the surface of a brittle material, make the material evaporate into a small groove, and then apply a certain pressure, the brittle material will crack along the small groove. The lasers used for laser scribing are generally Q-switched lasers and CO2 lasers.
Controlled fracture is to use the steep temperature distribution generated by laser grooving to generate local thermal stress in brittle materials, and make the materials break along the small groove.
The above is the principle introduction of metal laser cutting machine and metal laser cutting machine.