Laser marking technology is one of the largest applications for laser processing. Laser marking is a marking method that uses a high-energy-density laser to locally illuminate a workpiece, causing a chemical reaction of the surface material to vaporize or undergo a color change, thereby leaving a permanent mark. Laser marking can produce a variety of text, symbols and patterns, etc., the size of the characters can be from millimeters to micrometers, which has special significance for the anti-counterfeiting of products.
The ultra-fine laser beam with the advantage of focusing is like a tool, which can remove the surface material of the object point by point. The advanced nature is that the marking process is non-contact processing, without mechanical extrusion or mechanical stress, so it will not damage the processed object; Since the laser has a small size after focusing, the heat-affected area is small, and the processing is fine, it is possible to perform a process that cannot be achieved by conventional methods.
The “tool†used in laser machining is the spot after focusing. No additional equipment and materials need to be added. As long as the laser works normally, it can be processed continuously for a long time. Laser processing is fast and low cost. Laser processing is automatically controlled by a computer and requires no human intervention during production.
What kind of information can be marked by the laser is only related to the content designed in the computer. As long as the artwork marking system designed in the computer can recognize it, the marking machine can accurately restore the design information to the appropriate carrier. Therefore, the function of the software actually determines the function of the system to a large extent.
Compared with traditional processing methods, laser marking technology, as a modern precision processing method, has unparalleled advantages compared with traditional processing methods such as corrosion, EDM, mechanical scribing and printing:
1. The laser is used as a processing means, and there is no processing force between the workpiece and the workpiece, and has the advantages of no contact, no cutting force, and small heat influence, thereby ensuring the original precision of the workpiece. At the same time, it has a wide adaptability to materials, can make very fine marks on the surface of a variety of materials and has very good durability;
2. The spatial controllability and time control of the laser are very good, and the degree of freedom of the material, shape, size and processing environment of the processed object is very large, and it is especially suitable for automatic processing and special surface processing. And the processing method is flexible, which can meet the needs of laboratory-style single-item design, and can also meet the requirements of industrial mass production;
3. The laser scribing is fine, the lines can reach the order of millimeters to micrometers, and the marking and modification made by the laser marking technology are very difficult, which is extremely important for product anti-counterfeiting;
4. The combination of laser processing system and computer numerical control technology can form an efficient and automatic processing equipment, which can produce various texts, symbols and patterns, easy to design marking patterns with software, change the marked content, and adapt to the high efficiency and fast-paced requirements of modern production;
5. Compared with traditional screen printing, laser processing has no pollution source and is a clean and pollution-free high environmental protection processing technology;
Laser marking technology has been widely used in all walks of life, opening up broad prospects for high-quality, high-efficiency, pollution-free and low-cost modern processing and production. With the continuous expansion of the field of modern laser marking applications, the requirements for miniaturization, high efficiency and integration of laser manufacturing equipment systems are becoming higher and higher. The development of new high-power fiber laser technology is bound to be extremely successful. Big push.
Basic principle The basic principle of laser marking is that a high-energy continuous laser beam is generated by a laser generator. When the laser acts on the substrate, the atom in the ground state transitions to a higher energy state; the atom in the higher energy state is not. Stable, it will quickly return to the ground state. When the atom returns to the ground state, it will release extra energy in the form of photons or quantum, and convert the light energy into heat energy, so that the surface material is instantly melted and even vaporized, thus forming a graph. Text mark.
The Pearl River Delta. The laser marking in the Hong Kong and Taiwan region is called laser scanning of laser (Laser) processing.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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