Analysis of the types and application status of laser marking machines

Generally, the laser marking machine is controlled by a computer to make the workpiece and the laser beam move relative to each other, and the laser beam will ablate the required symbols and patterns on the surface of the workpiece. In theory, laser marking can be achieved as long as the controlled relative movement between the laser and the workpiece can be achieved. So now there are all kinds of laser marking machines in the field of laser marking. Laser marking machines can be divided into two categories: fixed light type and moving light type according to whether the beam moves or not. As the name suggests, the former is the laser beam fixed, the workpiece movement; the latter is the laser beam movement, the workpiece fixed. According to the light source, the laser marking machine adopts YAG laser and CO2 laser respectively. These two light sources are suitable for different materials. The YAG light source can process metal materials and most non-metal materials, while the CO2 laser light source is mainly used for processing. non-metallic materials. In recent years, with the decrease of the cost of semiconductor lasers, a new type of laser has appeared, and laser crystals such as semiconductor laser pumped YAG, etc., produce 1064nm laser, which is characterized by 10,000 hours of maintenance-free, small size, good beam quality, no A cooling system is required.

At present, laser marking machines are mainly used in online marking and laser engraving, among which online marking is the main direction of laser marking at present, and the market prospect is very large. Among various marking methods, galvanometer marking has become the mainstream marking because of its wide application range, vector marking and dot matrix characters, adjustable marking range and fast marking speed. It is considered to represent the development direction of laser marking in the future. Galvo marking can be used not only for online marking, but also for laser engraving, marking high-quality graphics or text, etc. Therefore, galvanometer laser marking has a tendency to replace other marking methods and has broad application prospects. In terms of marking area, the commonly used parameters of laser marking machines in the domestic market are: 70*70, 110*110, 140*140, 220*220. Minimum line width: 0.1-0.15mm. The scanning range of the field lens used for YAG should not exceed 200*200.

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