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What are the differences in the application of various light sources for laser cutting machines?

by:VENTECH     2022-02-26

The light cutting machine is an important tool in the cutting field and is known as the fast 'knife'. The principle is to irradiate the surface of the material with a high-density and high-energy laser beam to melt, vaporize, ablate or reach the ignition point. At the same time, the molten material is blown away by the high-speed airflow coaxial with the beam, so as to cut the workpiece and form a cut.

At present, there are many kinds of lasers on the market, which are divided into many kinds of light sources, such as: green light, infrared, ultraviolet, etc. Each light source has different advantages and is applied to various materials. Laser cutting can be divided into four types: laser vaporization cutting, laser melting cutting, laser oxygen cutting and laser scribing and controlled fracture.

So, what are the differences between the various light sources of laser cutting machines such as green/infrared/ultraviolet laser applications?

The analysis of the difference between the various light sources of laser cutting machines such as green/infrared/ultraviolet laser applications:

Several kinds of light sources commonly used in laser cutting machines, such as optical fiber (red light), purple light (ultraviolet), green light, etc., different light sources are used in different materials, according to the characteristics of the processed materials, the thickness of the materials, and the processing The higher the quality requirements and the higher the requirements for the quality of the laser beam and the thermal impact, the different absorption of the laser waveband, and the laser cutting machine selected will also be different.

1. Optical fiber of laser cutting machine light source (red light):

Fiber Laser (FiberLaser) refers to a laser that uses rare-earth element-doped glass fiber as the gain medium. The wavelength of the fiber is 1064nm, which has high stability, high precision, fast running speed, low processing cost, high laser power, and can be There are many types of cutting materials, which are suitable for processing large products; suitable materials for optical fibers: stainless steel plate, aluminum substrate, ceramic substrate, copper substrate, PCB, ceramic sheet, carbon steel, aluminum alloy, brass, copper, pickling board, plating Zinc plate, silicon steel plate, electrolytic plate, titanium alloy, manganese alloy, etc., suitable for cutting various metal materials.

2. Ultraviolet (purple light) of the light source of the laser cutting machine:

Ultraviolet laser has a wavelength of 355nm. The product of this wavelength is an all-rounder, and its spot is also very small. Due to the special UM wavelength, it has this all-round title in the traditional processing field. Laser marking, laser cutting, and laser welding are all You can see him. Fiber laser can't sit on it. It can do it. It can also be processed by C02. It performs well in ultra-wave cutting. It can be burr-free, neat and smooth for fine and ultra-thin cutting of metal products. , Fast speed, low energy consumption and other advantages. Ziguang applicable materials: cover film, FPC soft board, PCB soft and hard board, FPC auxiliary materials, ultra-thin metal, ceramics, polymer materials, resin, silicon wafer, PET/PI/PP film, adhesive film, copper foil, explosion-proof film , Electromagnetic film, Sony glue and other flexible films.

3. The green light of the laser cutting machine's light source:

The wavelength of green light is 532nm. It has a small spot and short focal length. It belongs to the cold working mode. It plays an irreplaceable role in precision cutting, especially in the circuit board, glass, ceramics, jewelry, glasses and other industries. You can see them. Green light applicable materials: precision cutting of covering film, FPC soft board, PCB soft and hard board, PET/PI/PP and other flexible films, ultra-thin glass, ceramic substrate and other materials.

Fiber laser cutting machines are mainly invested in the metal cutting industry. At present, the circuit board industry is basically UV and green cutting machines, since they are all circuit board cutting applications. The main difference between UV laser cutting machine and green laser cutting machine lies in the cost of equipment, processing efficiency, processing effect and processing purpose.

In the PCB field, the UV laser cutting machine can take into account the FPC soft board cutting, IC chip cutting and some ultra-thin metal cutting, while the high-power green laser cutting machine can only cut the PCB hard board in the PCB field. Although cutting can also be done on FPC soft boards and IC chips, the cutting effect is lower than that of UV lasers. Compared with the UV laser cutting machine, the price of the green laser cutting machine is also lower, and the early processing efficiency is also high. However, as the power of the UV laser cutting machine continues to rise, this advantage is gradually equalized. The heat influence on the processing effect is also small, and the effect is also ideal.

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