Many people may have heard the word laser from doctors. For example, laser surgery gives people a very novel feeling. Laser in daily life can be divided into two working modes: contact mode and non-contact mode. Laser is also widely used in six fields: industry, medical treatment, commerce, scientific research, information, and military. In the industrial field, there are mainly material processing and measurement control, and laser applications in our industry mainly include: laser marking, laser welding, and laser cutting.

The laser system can be divided into continuous wave laser and pulse laser. Its working principle is that when the laser beam shines on the surface of the workpiece, the light energy is absorbed and converted into heat energy, so that the temperature at the irradiation spot rises rapidly, melts, and vaporizes to form a small pit. As the metal around the spot is melted by thermal diffusion, the metal vapor in the small pit expands rapidly, producing a micro explosion, which ejects the molten material at a high speed and generates a strong directional anti shock wave, so a hole with large upper and small lower is made on the surface to be machined.

As the laser spot is small, the energy density is high, and the cutting speed is fast, the laser cutting can achieve good cutting quality. The dimensional accuracy of the cutting parts can reach plus or minus 0.05mm. The non-contact processing will not damage the surface of the workpiece. What's more, it can be used as the last process. Parts can be directly used to achieve two-dimensional cutting and three-dimensional cutting. The higher the power is, the higher the material thickness is, and the higher the processing efficiency is, Laser cutting technology is the main application of laser technology in industry. It accelerates the transformation of traditional processing industry and provides a new method for modern industrial processing, so as to become a laser processing method that is widely used in the current industrial processing field. At present, laser technology has been widely used in machinery manufacturing, bridge construction, sheet metal processing, shipbuilding and automobile manufacturing, electronics and electronics, aerospace and other pillar industries of the national economy