Application of co2 laser marking machine in the industry

Application of co2 laser marking machine in the industry

Before we understand the working principle of the co2 laser marking machine, let's first understand what a laser marking machine is. The laser marking machine uses a laser beam to mark the surface of various substances for a long time. The effect of marking is to expose the deep material through the evaporation of the surface material, so as to engrave exquisite patterns, trademarks and characters. Laser marking machines are mainly divided into CO2 laser marking machines, semiconductor laser marking machines, and fiber laser marking machines. And YAG laser marking machine, laser marking machine is mainly used in some occasions requiring finer and higher precision. Used in electronic components, integrated circuits (IC), electrical appliances, mobile communications, hardware products, tool accessories, precision instruments, glasses and clocks, jewelry, auto parts, plastic buttons, building materials, PVC pipes.

Working principle of co2 laser marking machine:

The CO2 laser marking machine is the carbon dioxide laser marking machine. The CO2 laser marking machine was first used in 1964 with a wavelength of 10.6 μm. Because this is a very efficient laser with a conversion efficiency of 10% as a commercial model, CO2 laser marking machines are widely used for laser cutting, welding, drilling and surface treatment. As a commercial application laser up to 45 kW, this is the most powerful material processing laser available.

Carbon dioxide laser marking machine is a laser galvanometer marking machine that uses CO2 gas as the working medium. The CO2 laser uses CO2 gas as the medium. CO2 and other auxiliary gases are charged into the discharge tube and high voltage is applied to the electrodes. Glow discharge is generated in the discharge tube, so that the gas emits a laser with a wavelength of 10.64um. After the laser energy is amplified, it is vibrated. After mirror scanning and F-Theta mirror focusing, under the control of computer and laser marking control card, images, characters, numbers and lines can be marked on the workpiece according to the user's requirements.

CO2 Laser Marking Machine

Types of CO2 Laser Marking Machines

The way waste heat is rejected has a large impact on laser system design. In principle, there are two possible ways. The first method is based on the automatic processing of naturally diffusing hot gas to the pipe wall, which operates on the principle of sealing and slow axial flow laser. The second is based on gas forced convection, which operates on the principle of fast axial flow laser. In general, there are five main types of CO2 lasers:

· Sealed or flowless

· Slow axial flow

· Fast axial flow

· Fast lateral flow

· Lateral Excited Atmosphere (TEA)

Sealed or flowless CO2 laser markers are often used for beam deflection laser marking. Its discharge tube is completely sealed. The quality of this laser beam is very good. And in most cases the entire discharge tube can be replaced with a new one and the old one can be refilled so it is easy to maintain. This eliminates the need for a separate gas supply system. Only need to make fewer connections at the laser head. So it's both tight and lightweight. But its energy output is low (usually less than 200 watts).

Carbon dioxide laser marking display diagram

TEA CO2 lasers are commonly used in shield fabrication. Operate only in pulsed situations. Air flow is low and air pressure is high. The excitation voltage is about 10,000 volts. This laser beam energy distribution is uniform over a relatively large area. Its highest energy can reach up to 1012 watts and its pulse width is very small. However, this form of laser is difficult to focus on small spots due to multi-state operation.