Can the laser cutting machine cut wooden boards? At present, wood cutting is mostly carried out by traditional saw blade cutting, but it will produce a lot of sawdust and noise pollution. Using laser to cut wood can not only reduce noise, but also reduce the generation of sawdust particles and reduce the harm to human body. The section quality of laser cutting wood is also better than that of traditional cutting. The rough, torn or fluffy wood grain on the cutting surface is not obvious, but covered with a thin carbonized layer.

Mechanism of cutting wood by laser cutting machine

There are two different basic ways of laser cutting wood: instantaneous gasification and combustion. The way of laser cutting wood depends on the power density absorbed by wood during laser cutting. Instantaneous gasification is an ideal wood cutting method, and the wood is gasified under the irradiation of focused laser beam to form a slit. The characteristics of gasification cutting are: fast cutting speed, no heat transfer to uncut base material, no carbonization of section, only slight darkening and glaze. However, the combustion cutting method is mainly due to the low power density of the beam, which is characterized by slow cutting speed, wider slit, large cutting thickness, accompanied by smoke and burnt smell. The energy consumed in cutting unit material by combustion method is higher than that by gasification method, and the trimming is carbonized. However, in the actual process of cutting wood, gasification is basically accompanied by combustion, because although gasification has the advantage of high efficiency, it needs high power density to achieve it. However, in the actual laser irradiation process, due to the influence of laser output power and beam mode, the beam power density in some areas of the material illumination surface is always lower than the power density required for gasification, so a small amount of combustion occurs. In addition, laser cutting wood also needs an auxiliary airflow coaxial with the light beam, which is generally low-pressure inert gas or air.

What kind of laser can cut wood?

Generally, CO2 laser is used for laser cutting wood, and its wavelength is 10.6 μ m.. However, the photoelectric conversion rate of CO2 laser is low (only 5% ~ 10%) and the energy consumption is relatively high. The laser needs to be ventilated frequently, and the maintenance cost is high; The external light path is complex, and it is difficult to install, debug and maintain. Therefore, CO2 laser has great limitations in practical industrial production applications, and its application is less and less.

At present, fiber laser (wavelength is 1μm) is very common in the market to cut metal plates, so can this fiber laser be used to cut wood? If it is 1μm wavelength erbium-doped fiber laser to cut wood, the answer is: it is more difficult. This is because the absorption rate of wood to 1μm wavelength laser is relatively low, and it is difficult to form kerfs.