What are the three types of fiber laser cutting machine?
Fiber laser cutting machine is widely used in our daily life. At present, there are three common laser cutting machines on the market: fiber laser cutting machine, CO2 laser cutting machine and YAG laser cutting machine
1. Fiber laser cutting machine
Fiber laser cutting machine is a laser cutting machine that uses a fiber laser generator as a light source.
Fiber laser is a new type of fiber laser that is newly developed in the world. It outputs high-energy-density laser beam, which is concentrated on the surface of the workpiece, so that the area irradiated by the ultra-fine focus spot on the workpiece is instantly melted and vaporized, and the spot is moved by the CNC mechanical system Realize automatic cutting by irradiating position. Compared with bulky gas lasers and solid-state lasers, it has obvious advantages and has gradually developed into an important candidate in the fields of high-precision laser processing, lidar systems, space technology, and laser medicine.
2. CO2 laser cutting machine
The CO2 laser cutting machine can stably cut carbon steel within 20mm, stainless steel within 10mm, and aluminum alloy under 8mm. The CO2 laser has a wavelength of 10.6um, which is relatively easy to be absorbed by non-metals. It can cut high-quality non-metal materials such as wood, acrylic, pp, and organic glass, but the photoelectric conversion rate of CO2 lasers is only about 10%.
The CO2 laser cutting machine is equipped with a nozzle for blowing oxygen, compressed air or inert gas n2 at the beam exit to increase the cutting speed and the smoothness of the cut. In order to improve the stability and life of the power supply, the CO2 gas laser must solve the discharge stability of the high-power laser. According to international safety regulations, laser hazard levels are divided into 4 levels, and CO2 laser is the least hazardous level. However, the cost of using a CO2 laser cutting machine is the most expensive of these three laser cutting machines.
3. YAG fiber laser cutting machine
YAG solid-state laser cutting machine has the characteristics of low price and good stability, but the low energy efficiency is generally <3%. The output power of current products is mostly below 800W. Due to the low output energy, it is mainly used for punching and cutting of thin plates. Its green laser beam can be applied in pulse or continuous wave conditions. It has short wavelength and good light concentration. It is suitable for precision machining, especially hole machining under pulse. It can also be used for cutting, welding and lithography. The wavelength of the YAG solid-state laser cutting machine laser is not easily absorbed by non-metals, so non-metallic materials cannot be cut. What the YAG solid-state laser cutting machine needs to solve is to improve the stability and life of the power supply, that is, to develop a large-capacity, long-life optical pump Excitation light sources, such as the use of semiconductor light pumps, can greatly increase energy efficiency.