What makes laser cutting with Nd YAG laser is better than CO2 laser?

In general, CO2 laser cutting machine aims at non-metal processing under the condition of low power.

YAG laser cutting machine for metal processing.

When the power is high, the CO2 laser cutting machine can also process metal more stably.

CO 2 laser cutting machine is a domestic truking laser.

YAG laser cutting machine

Advantages: the output wavelength of YAG solid-state laser is short, and the coupling with metal is high, which is beneficial to be absorbed by metal surface. Carbon steel and stainless steel including copper, aluminum and other high reflective non-ferrous metals have better light absorption. Moreover, YAG laser has small volume, small equipment occupation, low energy consumption and low investment cost, which is suitable for small and medium-sized enterprises.

Disadvantages: the conversion efficiency of YAG solid state laser is only 1-3%; There is an internal temperature gradient in the working process of YAG laser rod, which will cause thermal stress and thermal lens effect, which limits the further improvement of average power and beam quality of YAG laser; The cost per watt output power of YAG laser is more expensive than CO2 laser and fiber laser.

CO2 laser cutting machine

Advantages: because the input laser wavelength of CO2 laser is 10.6 μ m, the wavelength is long, the coupling with non-metallic materials is high, and it is easy for non-metallic surface to absorb, so the medium and small power CO2 laser is mainly used in non-metallic material processing industry, while the high power CO2 laser is mainly used in metal material processing industry.
Laser engraving machine for woodworking

CO2 application is more, YAG application is less. The process is relatively less mature than CO2.

The differences between CO2 laser cutting machine and fiber laser cutting machine are as follows

First of all, as the mainstream of traditional laser cutting and welding equipment, CO2 laser can stably cut carbon steel within 20 mm, stainless steel within 10 mm and aluminum alloy below 8 mm. Fiber laser has obvious advantages in cutting thin plate less than 4mm, but its quality is poor in cutting thick plate due to the influence of solid laser wavelength. Laser cutting machine is not omnipotent. The wavelength of CO2 laser is 10.6um, while that of solid laser such as YAG or fiber laser is 1.06um. The former is easy to be absorbed by non-metal, and can cut wood, acrylic, PP, plexiglass and other non-metal materials with high quality, while the latter is not easy to be absorbed by non-metal, so it can't cut non-metal materials Silver, pure aluminum and other high reflective materials are helpless.
Glass laser engraving machine

Secondly, because the wavelength difference between CO2 and fiber laser is an order of magnitude, the former can not be transmitted by fiber, while the latter can be transmitted by fiber, which greatly increases the flexibility of processing. In the early days, before the launch of fiber laser on the market, in order to realize three-dimensional processing, we used optical joint technology to guide CO2 laser to three-dimensional curved surface through a highly precise and dynamic combined mirror system, so as to realize three-dimensional processing of CO2 laser. Due to the limitations of domestic precision processing technology, this technology is mainly in the hands of a few developed countries in Europe and the United States, which is expensive, The demand for maintenance is high, and the market share of fiber laser is gradually expanding, at the same time, it has gradually lost its market. Fiber laser can be transmitted through optical fiber, so its flexibility is improved unprecedentedly. Especially for the automobile industry, because it is basically about 1 mm thin plate surface processing, fiber laser with the same flexible robot system, has low cost, few fault points, convenient maintenance, and extremely fast speed, so it is duty bound to steadily occupy this market.
Stainless steel laser engraving machine

Thirdly, the photoelectric conversion rate of fiber laser is as high as 25%, while the photoelectric conversion rate of CO2 laser is only about 10%. The advantages of fiber laser are quite obvious in terms of electricity consumption and supporting cooling system. If the fiber laser manufacturers are more, the price is more appropriate, and the thick plate cutting process is solved, the threat to CO2 laser will be huge. However, as a new laser technology, fiber laser is far less popular than CO2 laser, and its stability, reliability and convenience of after-sales service need to be observed in the market for a long time.

It is worth mentioning that according to the international safety standards, the laser harm level is divided into four levels. CO2 laser is the least harmful level, while fiber laser is the most harmful level due to its short wavelength and great harm to human eyes. For safety reasons, fiber laser processing needs a fully enclosed environment.