How does the wavelength of the laser marking machine affect the marking effect?

In the actual operation of the laser marking machine, we will consider the influence of various factors on the marking effect, of which the role of the laser wavelength can not be underestimated. Today, laser marking machine manufacturer Hewei Laser combined with 20 years of laser equipment experience, to tell you how the wavelength of the laser marking machine is about the marking effect.

The interaction of different wavelengths with materials

Laser marking machine common wavelength1064nm,532nmand355nmLet's wait. For metallic materials,1064nmWavelengths of infrared laser are more commonly used. Because the laser absorption rate of the metal at this wavelength is relatively high, the laser energy can be effectively absorbed by the metal, which in turn generates enough heat on the metal surface to achieve clear marking.

Like marking stainless steel products,1064nmThe wavelength of the laser allows the marking depth to be moderate, and the writing is clear and firm. For some non-metallic materials, such as plastics, ceramics, etc., short-wavelength lasers may work better. Such as355nmThe wavelength of the ultraviolet laser, which has a high photon energy, is able to directly break the chemical bonds of the material molecules"Cold working". In this way, marking plastic can avoid material deformation caused by overheating, and the marking edges are neat and high precision.

Influence of wavelength on marking accuracy

The shorter the wavelength, the smaller the focus spot of the laser, and the higher the marking accuracy.532nmWavelength of green laser, its focus spot ratio1064nmThe infrared laser is smaller. When marking small parts with high precision requirements, the green laser marking machine can show its advantages.

It can clearly print fine patterns or text on a very small area to meet the needs of high-precision marking in electronic components and other industries. while1064nmThe wavelength of the laser, although the spot is relatively large, but in some of the precision requirements are not particularly high, the need for a larger marking area of the scene, such as the specification of large metal pipe marking, can rely on its high energy output, quickly complete the marking task.

Wavelength and marking speed

The wavelength also affects the marking speed. In general, the higher the absorption rate of the material to the laser, the faster the marking speed can be. Take metal marking, for example.1064nmThe wavelength of the laser is well absorbed by the metal, and the marking speed is relatively fast on the premise of ensuring the marking quality.

For some materials with poor absorption of specific wavelengths, if an inappropriate wavelength is selected, even if the laser power is increased, the marking speed is difficult to improve, and the marking effect may be affected. Therefore, choosing the right wavelength laser marking machine according to the material characteristics is crucial to improving production efficiency.

The wavelength of the laser marking machine affects the marking effect from many aspects. In practical applications, we should choose the right wavelength laser marking machine according to the nature of the marking material, the marking accuracy and the speed requirements, so as to achieve better marking effect and meet different production needs.