CO2 laser marking machine is a laser beam on the surface of a variety of substances marked with a permanent mark. CO2 laser marking machine marking effect is through the surface layer of material evaporation exposed deep material, which engraved exquisite designs, trademarks, dates, LOGO or text. Used in food, medicine, wine, electronic components, integrated circuits (IC), electrical appliances, mobile communications, building materials, PVC pipe and other industries.
1, the excitation mode: carbon dioxide laser is the use of electrode excitation carbon dioxide gas and produce laser, according to the metal electrode installation location can be divided into DC excitation and RF excitation.
2, the laser frequency: laser output sub-pulse output and continuous output for cutting and welding of the laser pulse output mode, the pulse frequency mainly affects the cutting speed and incision roughness, to obtain high-speed cutting, high frequency is essential Of the current production of most manufacturers of carbon dioxide laser frequencies are less than 5000Hz.
3, beam divergence angle: from a strict point of view, the beam divergence angle does not belong to the laser part of the content, but because the laser mode far-field divergence angle of great influence, so I put it here to discuss. The influence of beam divergence angle on the cutting quality is reflected in the width and slope of the incision. The smaller the divergence angle is, the narrower the width of the incision is, the smaller the gradient is, and the higher the quality is.
4, laser mode: measure the quality of laser one of the most important indicators. Can be divided into single-mode, base mode and multi-mode. The base model has both an index of 0 in the TEM-00 mode and an X and Y axis, so it is an ideal dot. The laser beam with TEM-00 mode can obtain the smallest beam diameter, and the cutting process can obtain the smallest slit and faster cutting speed due to its small spot. The multi-mode is the XY direction are non-0 index, the beam quality is poor, generally only with the welding without cutting.
5, laser power: including peak power, energy stability and other factors. 4KW laser, for example, can cut 20mm thick carbon steel plate, or 15mm stainless steel, 10mm aluminum alloy; and more than 5KW laser can cut 25mm thick carbon steel, Stainless steel up to 20mm power is another indicator of power stability, excellent cutting quality, must be excellent through the incision throughout. Long-term production of lasers is also a very important test. DC excitation laser due to electrode ablation, resulting in long-term work state power attenuation. In addition, because some lasers vacuum pump and turbo pump lubricating oil, lubricating oil pollution laser resonator, and shorten the laser life.