Industrial high power laser die cutter CO2 laser working principle

                                                    laser die making machine

In the fast-growing industry, many automation devices increase productivity.

Worthy Tall Industry Co., Ltd introduces the working principle and performance of the CO2 laser generator of high power laser die cutter:

The high-power laser knife-die machine relies on the CO2 laser as the light source. In the CO2 laser, the main working substance is composed of three gases: CO2, nitrogen and helium. Among them, CO2 is a gas that generates laser radiation, nitrogen and helium are auxiliary gases.

1. Laser mode is one of the most important indicators for measuring laser quality. Can be divided into single mode, basic mode and multimode. The fundamental mode is both TEM00 mode, and its index on the X and Y axes is 0, so it is an ideal dot. The laser with TEM00 mode can obtain the smallest beam diameter, and the smallest slit and faster cutting speed can be obtained in the cutting process because of its small spot size. The multimode is a non-zero index in the XY direction, and its beam quality is poor, and it is generally used only for welding and not for cutting.

2, laser cutting machine, laser power. Including peak power, energy stability and other factors. Different powers can be cut through the thickness of the metal sheet. For example, a 4KW laser can cut a 20mm thick carbon steel sheet or a 15mm stainless steel 10mm aluminum alloy; and a laser above 5KW can cut a 25mm thick carbon steel. Stainless steel up to 20mm. Another indicator of power is power stability, excellent cutting quality, and must be excellent throughout the cut. Long-term production is also a very important test for lasers. DC-excited lasers have attenuated power during long-term operation due to electrode ablation. In addition, since some of the vacuum pumps and turbo pumps of the laser are lubricated with lubricating oil, the lubricating oil contaminates the laser cavity and shortens the life of the laser.

3. Excitation mode, the carbon dioxide laser uses an electrode to excite carbon dioxide gas to generate a laser. According to the installation position of the metal electrode, it can be divided into DC excitation and RF excitation.

4. Beam divergence angle. From a strict point of view, the beam divergence angle is not part of the laser part, but since the mode of the laser has a great influence on the far field divergence angle, we will discuss it here. The influence of the beam divergence angle on the cutting quality is reflected in the width and slope of the slit. The smaller the divergence angle, the narrower the slit width, and the smaller the slope, the higher the quality.

5. Laser frequency, laser output pulse output and continuous output. The laser used for cutting and welding mainly adopts pulse output mode. The pulse frequency mainly affects the cutting speed and the roughness of the slit. To obtain high-speed cutting, high frequency is essential. of. At present, the carbon dioxide lasers produced by most manufacturers are all within 5000 Hz.