Introduction to the principle and classification of metal laser cutting machine

What is a metal Laser Cutting Machine? Metal laser cutting machine is a kind of machine equipment made of metal and using laser technology for cutting. Many metal processing manufacturers now use laser cutting machines to cut machine metals. Laser is a beam with very strong release ability. Laser can achieve extremely fast cutting in a very short time, so metal cutting machine is very labor-saving and time-saving. Do you know the principle of metal laser cutting machine? The following laser cutting machine brand manufacturers will introduce the principle of metal laser cutting machine to you.

1. Principle

Laser cutting is to irradiate the workpiece with a focused high-power density laser beam, so that the irradiated material rapidly melts, vaporizes, ablates or reaches the ignition point. open. Laser cutting is one of the thermal cutting methods.

2) Laser melting cutting

When laser melting and cutting, the metal material is melted by laser heating, and then non-oxidizing gas (Ar, He, N, etc.) is sprayed through a nozzle coaxial with the 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 completely vaporize the metal, and the energy required is only 1/10 of the vaporized cutting.

Laser melting cutting is mainly used for cutting materials that are not easily oxidized or active metals, such as stainless steel, titanium, aluminum and their alloys.

3) Laser oxygen cutting

The principle of laser oxygen cutting is similar to that of oxyacetylene cutting. It uses a laser as a preheating heat source and an active gas such as oxygen as a cutting gas. On the one hand, the blown gas acts on the cutting metal to produce an oxidation reaction, releasing a large amount of oxidation heat; on the other hand, the molten oxide and molten material are blown out from the reaction zone to form a cut in the metal. Since the oxidation reaction in the cutting process generates a lot of heat, the energy required for laser oxygen cutting is only 1/2 of that of melting cutting, and the cutting speed is much higher than that of laser vaporization cutting and melting cutting. Laser oxygen cutting is mainly used for easily oxidized metal materials such as carbon steel, titanium steel and heat-treated steel.

4) Laser scribing and controlled fracture

Laser scribing uses a high-energy-density laser to scan the surface of a brittle material, so that the material is heated and evaporated to form a small groove, and then a certain pressure is applied, and the brittle material will crack along the small groove. Lasers used for laser scribing are generally Q-switched lasers and CO2 lasers.

Controlled fracture utilizes the steep temperature distribution produced by laser grooving to generate localized thermal stress in the brittle material, causing the material to break along the small groove.

The above is the relevant introduction of metal laser cutting machine. Metal laser cutting machine is a kind of machine equipment that can automatically typesetting and unloading. It can save a lot of materials, and the material cut by metal laser cutting machine is very flat, and its incision is very smooth. The price of equipment such as metal laser cutting machine is not cheap. The general price is more than ten thousand or twenty thousand, but this kind of equipment can reduce the processing cost during the operation. Most processing manufacturers will choose this kind of equipment, which can reduce the manufacturing cost and processing cost of the enterprise.