A laser marking machine uses high-energy-density laser to locally irradiate the surface of a workpiece, causing the surface material to vaporize or undergo a chemical reaction that changes color, thereby leaving a permanent mark. The specific process is as follows: The power supply system provides energy for the laser. The laser medium in the laser (such as the YAG crystal under the excitation of the intense light from the krypton lamp) generates light vibration through the resonant cavity and forms a laser beam. The laser beam is transmitted to the marking head through an optical fiber or an optical system, and then scanned by the galvanometer system under the precise control of the control card, moving on the material surface according to a preset path. After the laser energy is absorbed by the material, it causes the local temperature to rise rapidly, leading to surface evaporation, melting or chemical reactions, and finally forming the desired mark.

Laser marking machines are widely used in industries such as electronics and electrical appliances, metal processing and manufacturing, medical devices, food, beverage and packaging, daily chemicals and cosmetics, jewelry and gifts. They can be used to mark information such as product serial numbers, QR codes, models, parameters, production dates, and logos, as well as perform pattern engraving, decorative texture processing, and other operations.