How is laser marking done?

1. What is laser marking

Laser marking technology is one of the biggest application fields of laser processing. Laser marking is a kind of marking method, which uses high energy density laser to irradiate the workpiece locally to vaporize or change the color of the surface material. Laser marking can produce a variety of characters, symbols and patterns, and the size of characters can range from millimeter to micron, which has a special significance for the anti-counterfeiting of products.

2. What can laser marking do

The basic principle of laser marking is that a continuous laser beam with high energy is generated by a laser generator, and the focused laser acts on the substrate material to make the surface material instantly melt or even vaporize. By controlling the path of the laser on the surface of the material, the required graphic mark can be formed.

The characteristic of laser marking is non-contact processing. It can be engraved on any irregular surface. The workpiece will not deform and produce internal stress. It is suitable for marking metal, plastic, glass, ceramics, wood, leather and other materials.

Laser can mark almost all parts (such as piston, piston ring, valve, valve seat, hardware tools, sanitary ware, electronic components, etc.), and the marks are wear-resistant, the production process is easy to realize automation, and the deformation of the marked parts is small.
Micro laser engraving machine

The laser marking machine uses the scanning method to mark, that is, the laser beam is incident on the two mirrors, and the computer controls the scanning motor to drive the mirrors to rotate along the X and Y axes respectively. After the laser beam is focused, it falls on the marked workpiece, thus forming the mark of laser marking

In the Pearl River Delta, Hong Kong and Taiwan, laser marking is transliterated as laser processing.

3. Advantages of laser marking

After focusing, the laser beam is like a tool, which can remove the surface material by point. The advanced nature is that the marking process is non-contact, and no mechanical extrusion or mechanical stress is generated, so that the processed products will not be damaged. Due to the small size, small heat affected area and fine processing after laser focusing, some processes that cannot be realized by conventional methods can be completed.
Stainless steel laser engraving machine

The "cutting tool" used in laser processing is the light spot after focusing. It does not need additional equipment and materials. As long as the laser can work normally, it can be processed continuously for a long time. Laser processing is fast and low cost. Laser processing is automatically controlled by computer, and no human intervention is needed in production.
Micro laser engraving machine DIY

What kind of information laser can mark is only related to the content of the design in the computer. As long as the drawing marking system designed in the computer can recognize, then the marking machine can accurately restore the design information on the appropriate carrier. Therefore, the function of the software actually determines the function of the system to a great extent.