Fiber laser cutting machine, the principle of fiber laser cutting is through the transmission of optical fiber, the flexibility of the laser has been significantly improved, and there are fewer fault points, fast speed and convenient maintenance. It performs amazingly when cutting thin plates of about 3mm, which has a great advantage. However, due to the influence of the wavelength of the solid-state laser, its quality performance when cutting thicker plates is unsatisfactory. Generally speaking, the laser wavelength of fiber laser cutting machine is 1.06um, which is not easily absorbed by metal and cannot cut non-metallic materials. The photoelectric conversion rate of fiber laser is more than 25%, and the advantages of fiber laser in terms of electricity consumption and supporting cooling system are quite obvious.
YAG solid-state laser cutting machine, the output power of YAG solid-state laser cutting machine is generally below 1000W, which has good stability and obvious price advantage. The output energy of the YAG-based solid-state laser is small, and it is generally mainly used for cutting, drilling and welding of metal sheets. His green laser beams are available in pulsed or continuous wavelengths, with short wavelengths for precision machining, especially in pulsed hole machining, but also for cutting, welding and punching. The wavelength of the YAG solid-state laser is easily absorbed by metals. It is a pulsed laser with instantaneous power and can cut non-ferrous metals such as copper and aluminum. The wavelength of YAG solid-state laser cutting machine is 1.06um, which is not easily absorbed by non-metallic materials.
Comparison and performance characteristics of four laser cutting machines
CO2 laser cutting machine, CO2 laser cutting machine can stably cut carbon steel within 20mm, stainless steel within 10mm and aluminum alloy under 8mm. Carbon dioxide lasers have a wavelength of 10.6um, but non-metals are easily absorbed.
Although the light conversion rate of carbon dioxide lasers is only about 10%, non-metallic materials such as wood, acrylic, PP, plexiglass, etc. Carbon dioxide lasers are equipped with oxygen jets, compressed air or inert gas N2 nozzles at the beam exit to improve cutting speed and cut flatness. In order to improve the stability and service life of the power supply, the carbon dioxide gas laser should solve the discharge stability problem of high-power lasers. To target thick plates, the usage cost is higher than other plates.
Ultraviolet laser cutting machine, ultraviolet (UV) laser cutting machine has a wavelength of 355nm, and adopts the third-order intracavity frequency doubling technology. Compared with infrared lasers, 355 ultraviolet light has a very small focusing spot, which can greatly reduce the mechanical properties of the material. The advantages of deformation and processing heat-affected zone are small. It is the preferred choice for fine processing. It is mainly used for ultra-fine marking, engraving and micro-cutting. , glass material marking/scribing, and complex micro-cutting of silicon wafers.
