Fiber laser cutting machine are important tools in the field of cutting and are known as the fastest "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, and at the same time use the high-speed airflow coaxial with the beam to blow away the molten material, so as to cut the workpiece and form a cut.

There are many lasers on the market, with various light sources, such as green light, infrared, ultraviolet, etc. Each light source has different advantages and is used on various materials. Laser cutting can be divided into four categories: laser vaporization cutting, laser melting cutting, laser oxygen cutting, and laser scribing and controlled fracture.

So, what are the differences in the application of various light sources of fiber laser cutting machines, such as green light/infrared/ultraviolet lasers?

Analysis of the differences in the application of various light sources of fiber laser cutting machines, such as green light/infrared/ultraviolet lasers:

There are several light sources commonly used in fiber laser cutting machines, such as fiber (red light), purple light (ultraviolet), green light, etc. Different light sources are used for different materials, according to the characteristics of the materials to be processed, the thickness of the materials, the processing quality requirements, and the requirements for the quality of the laser beam and the thermal impact. The higher the requirements, the different absorption of the laser band, and the different laser cutting machines selected.

1. Fiber laser cutting machine light source (red light):

Fiber laser refers to a laser that uses rare earth-doped glass fiber as a 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 cut a variety of materials. It is suitable for processing large products; fiber optic applicable materials: stainless steel plate, aluminum substrate, ceramic substrate, copper substrate, PCB, ceramic sheet, carbon steel, aluminum alloy, brass, copper, pickling plate, galvanized plate, silicon steel plate, electrolytic plate, titanium alloy, manganese alloy, etc., suitable for cutting various metal materials.

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

Ultraviolet laser has a wavelength of 355nm. Products with this wavelength are all-round and have a small spot. Due to the special UM wavelength, it has the title of all-round in the traditional processing field. It can be used for laser marking, laser cutting, and laser welding. It can do what fiber laser cannot do. It can also do what C02 cannot process. It performs well in ultra-wave cutting. It can achieve burr-free, neat and smooth, fast speed, and low energy consumption for fine and ultra-thin cutting of metal products. Applicable materials for purple light: covering film, FPC soft board, PCB soft and hard board, FPC auxiliary materials, ultra-thin metal, ceramics, polymer materials, resins, silicon wafers, PET/PI/PP films, adhesive films, copper foil, explosion-proof films, electromagnetic films, Sony adhesives and other flexible films.

3. Green light of fiber laser cutting machine:

The wavelength of green light is 532nm. Its spot is very small and its focal length is shorter. It belongs to the cold processing mode. It plays an irreplaceable role in precision cutting and processing, especially in the circuit board, glass, ceramics, jewelry, glasses and other industries. Green light is applicable to materials: precision cutting of cover film, FPC soft board, PCB soft and hard board, PET/PI/PP and other flexible films, ultra-thin glass, ceramic substrates and other materials.

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

In the PCB field, UV laser cutting machine can take into account FPC soft board cutting, IC chip cutting and some ultra-thin metal cutting, while high-power green light laser cutting machine can only do PCB hard board cutting in the PCB field. Although it can also do cutting on FPC soft board and IC chip, the cutting effect is lower than that of UV laser. Compared with UV fiber laser cutting machines, green laser cutting machines are cheaper and more efficient in the early days, but as the power of UV laser cutting machines continues to rise, this advantage has gradually been equalized. In terms of processing effects, the heat impact is smaller and the effect is more ideal.