Various laser technologies' principle and application

The characteristic of laser

Laser is especially suitable for material processing because of its characteristics of monochromatic, coherence and parallelism. In addition, its good space control and time control, processing object material, shape, size and environment of freedom are very large, especially suitable for automatic processing. The combination of laser machining system and computer numerical control technology can constitute efficient automatic processing equipment, which has become the key technology for enterprises to implement timely production, and has opened up broad prospects for high-quality, efficient and low-cost processing and production.

The application of laser

Laser processing has become the main field of laser application, there are more than 20 laser processing technology. For example, laser rapid prototyping technology, laser welding technology, laser drilling technology, laser cutting technology, laser marking technology, laser cleaning technology, laser heat treatment and surface treatment technology. Below I do a simple analysis of the principle and application of the main laser technology.

Laser rapid prototyping technology, according to the CAD model of parts, uses laser beam to solidify the photosensitive polymeric materials layer by layer, and accurately piles into samples. It can quickly and accurately manufacture complex parts without molds and tools. This technology has been widely used in aerospace, electronics, automobile and other industrial fields.

Laser cutting is to use a focusing mirror to focus the CO2 laser beam on the surface of the material to melt the material, and at the same time with the laser beam coaxial compressed gas blowing away the melted material, and the laser beam and the material along a certain trajectory for relative movement, so as to form a certain shape of the slit.Laser cutting technology is widely used in the processing of metal and non-metal materials, which can greatly reduce the processing time, reduce the processing cost and improve the quality of the workpiece.

Laser welding uses a laser beam smaller than the one used to cut metal to melt the material without vaporizing it, forming a continuous solid structure as it cools.This technology has bath purification effect and can purify welding metal.Laser welding has high energy density, which is especially beneficial for metal welding with high melting point, high reflectivity, high thermal conductivity and very different physical properties.

Laser marking technology is the use of high energy density laser irradiation on the workpiece, is the surface material vaporization or color change of chemical reaction, so as to leave a permanent marking method.Can type a variety of characters, symbols and patterns, the size of characters can be from millimeter to micron magnitude, which has special significance for product security.

Laser space control and time control is very good, the material of the processing object, shape, size and the environment of the degree of freedom are very large, especially suitable for automatic processing.The combination of laser machining system and computer numerical control technology can constitute efficient automatic processing equipment, which has become the key technology for enterprises to implement timely production, and has opened up broad prospects for high-quality, efficient and low-cost processing and production.