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Working principle and application of 3D laser marking
Updatetime: 2021-07-12 11:35View:

Working principle:

   A high energy density laser is used for local irradiation of the workpiece to vaporize the surface material or produce a chemical reaction of color change, thus leaving a permanent mark.Laser marking can mark a wide range of text, symbols and patterns, and can even be micron in size.The laser beam used for laser marking is generated by the laser, and after a series of optical conduction and processing, the laser beam is finally focused through the optical lens, and then the focused high energy beam is deflected to the specified position on the surface of the object to be processed, forming a permanent dent.The traditional 2D laser marking adopts the post-focusing mode and can only be done in the specified range.And 3 d laser marking machine adopts advanced before gathering way, more dynamic focusing, take this light principles, such as the working principle of the candle imaging, move through the software control and dynamic focusing mirror, in front of the laser is focused on variable beam expander, by changing the focal length of the laser beam to realize accurate surface focus on processing of different objects.


Application Scope:

Mass engraving

   The 3D marking adopts the pre-focusing optical mode and USES the larger X and Y axis deflector lens, so it can allow the conducting laser spot to be larger, with better focusing accuracy and better energy effect.If 3D marking works with the same focusing precision as 2D marking, the marking range can be larger.

   As long as the shape of the workpiece is pre-set, the focal length, marking position and shape change of different product positions can be corresponded by simply switching the setting.No need to move the workpiece many times or laser marking can be completed.


Deep engraving printing

   There are inherent defects in 2D marking for deep carving on object surface. As the laser focus moves up in the carving process, the laser energy acting on the actual surface of the object will drop sharply, seriously affecting the effect and efficiency of deep carving.For the traditional deep carving method is the electric way in the carving process every time the lifting platform will move a certain height to ensure the laser surface focus good.3D marking for deep carving processing, perfect effect, high efficiency and can save the cost of electric lifting platform


High and low surface engraving

   In the current traditional 2D marking mode, the workpiece must be placed on the same plane, and the machining surface must be on the same plane, in order to achieve a molding marking.Using the characteristics of 3D laser marking machine, it can realize the marking of the workpiece with a single forming, even on the inclined slope, can maintain the consistency of the processing, so that the processing content does not deform, do not form color difference.Greatly facilitate the three-dimensional structure of the workpiece carving, reduce the process, improve the efficiency of marking.


Arbitrary surface engraving

   Because 3D marking can quickly change the focal length and the position of the laser beam, it is possible to mark the surface which cannot be achieved in 2D before.After the use of 3D, cylinder marking within a certain radian can be completed at one time, greatly improving the processing efficiency.


Color emboss signet

   In the same plane, you can achieve black and white, or even multicolor marking, the effect is more rich.For the blackening of general metal surface, such as anodic alumina, it is usually marked with high frequency pulse under appropriate energy and certain defocusing condition. The defocusing distance significantly affects the energy distribution and color effect of laser on the material surface.For general 2D marking users, it is of great significance for 3D marking function to carry out multi-gray and multi-color plane processing even without surface marking and other advanced features.


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