The light cutting machine is an important tool in the cutting field, known as the fast “knife”. Its principle is to irradiate the surface of materials with high density and high energy laser beams, 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 materials, so as to realize the cutting of workpieces and form cutting.
At present, there are many kinds of lasers in the market, including various light sources, such as green light, infrared light, ultraviolet light, etc. Each light source has different advantages and is applied to various materials. Laser cutting can be divided into laser vaporization cutting, laser melting cutting, laser oxygen cutting and laser scribing and controlled fracture.
So, what are the differences in laser applications such as green light, infrared light and ultraviolet light of various light sources of the laser cutting machine?
Distinguishing analysis of laser applications such as green light, infrared light and ultraviolet light from various light sources of laser cutting machine:
There are several light sources commonly used for laser cutting machines, such as optical fiber (red light), purple light (ultraviolet light), green light, etc. Different light sources are used for different materials. The higher the requirements for the characteristics of the materials to be processed, the thickness of the materials, the processing quality, and the laser beam quality and thermal impact, the different the absorption of the laser band, and the different laser cutting machines will be selected.
1. Optical fiber of laser cutting machine light source (red light):
Fiber laser refers to the laser using rare earth doped glass fiber as the gain medium. The wavelength of the fiber is 1064nm, which has high stability, high precision, fast operation speed, low processing cost, high laser power, and a wide variety of materials that can be cut, which is suitable for the processing of large products; Applicable materials of optical fiber: stainless steel plate, aluminum plate, ceramic plate, copper plate, PCB, ceramic sheet, carbon steel, aluminum alloy, brass, red copper, pickling plate, galvanized plate, silicon steel plate, electrolytic plate, titanium alloy, manganese alloy, etc., which are suitable for cutting various metal materials.
2. Ultraviolet (ultraviolet) of laser cutting machine light source:
The ultraviolet laser is 355nm in wavelength. The product with this wavelength belongs to the omnipotent type, and its light spot is also very small. Because of the special UM wavelength, it has the name of omnipotent in the traditional processing field. You can see his figure in laser marking, laser cutting, and laser welding. The optical fiber laser can’t sit down, but it can do it. The C02 cannot do it, but it can also do it. It performs well in ultra wave cutting, For the micro and ultra-thin cutting of metal products, it can achieve the advantages of burr free, neat and smooth, fast speed, low energy consumption, etc. Purple light applicable materials: covering film, FPC soft board, PCB soft and hard board, FPC auxiliary materials, ultra-thin metal, ceramics, polymer materials, resin, silicon chip, PET/PI/PP film, adhesive film, copper foil, explosion-proof film, electromagnetic film, Sony glue and other flexible films.
3. Green light of laser cutting machine light source:
The wavelength of green light is 532nm. Its light spot is very small and its focal length is short. It belongs to the cold processing mode. It plays an irreplaceable role in precision cutting, especially in PCB, glass, ceramics, jewelry, glasses and other industries. 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.
Optical fiber laser cutting machines are mainly invested in the metal cutting industry. At present, most of the circuit board industry is put into production with UV and green light cutting machines, since they are all used for cutting circuit boards. The main differences between UV laser cutting machine and green laser cutting machine lie in the cost of equipment, processing efficiency, processing effect and processing purpose.
UV laser cutting machine can take into account FPC soft board cutting, IC chip cutting and some ultra-thin metal cutting in the PCB field, while high-power green laser cutting machine can only cut PCB hard boards in the PCB field. Although it can also cut FPC soft boards and IC chips, the cutting effect is lower than that of UV laser. Compared with the ultraviolet laser cutting machine, the green laser cutting machine has lower price and higher processing efficiency in the early stage. However, with the continuous increase of the power of the ultraviolet laser cutting machine, this advantage is gradually equalled. In terms of processing effect, the heat effect is small and the effect is ideal.
