A few research directions of laser processing technology

2018-06-10 21:08:42 admin 11

Laser processing is the use of light energy to focus on the lens to achieve a high energy density on the focus, depending on the photothermal effect of processing. Laser processing does not require tools, fast processing speed, small surface deformation, and can process various materials.

Materials are processed by laser beams, such as drilling, cutting, dicing, welding, heat treatment and so on. Some substances with metastable energy levels can absorb light energy under the excitation of external photons, making the number of high energy atoms larger than the number of low energy atoms - the number of particles reverses. If a beam of light is irradiated, the energy of the photon is equal to the corresponding difference between the two energies, then the stimulated radiation will be produced and a large amount of light is output. Yes.

Laser technology is a comprehensive technology involving many subjects such as light, machine, electricity, material and detection. Traditionally, the scope of its research can be divided into 9 aspects:

1. Laser processing system. It includes laser, light guide system, machine tool, control system and detection system.

2. Laser processing technology. Including welding, surface treatment, drilling, marking, fine-tuning and other processing technology.

3, laser welding: thick and thin car body, automobile parts, lithium battery, heart pacemaker, sealed relay and other sealing devices, as well as all kinds of devices that do not allow welding pollution and deformation. The lasers used include YAG lasers, CO2 lasers and semiconductor pumped lasers.

4, laser cutting: automobile industry, computer, electrical machine shell, wood knife mold industry, cutting of all kinds of metal parts and special materials, circular saw, acrylic, spring gasket, copper plate for electronic parts below 2mm, some metal mesh, steel tube, tin plate, plated lead steel plate, phosphorus bronze, electric wood board, thin aluminum alloy Quartz glass, silicone rubber, alumina ceramics below 1mm, titanium alloy used in aerospace industry and so on. The laser has a YAG laser and a CO2 laser.

5, laser marking: it is widely used in all kinds of materials and almost all industries. The laser used is YAG laser, CO2 laser and semiconductor pump laser.

6, laser drilling: laser drilling is mainly used in aerospace, automobile manufacturing, electronic instruments, chemical industry and other industries. With the rapid development of laser drilling, the average output power of YAG laser has increased from 400W to 800W to 1000W. The more mature application of laser drilling in China is in the production of artificial diamond and natural diamond drawing die, the gem bearing of watch and meter, aircraft blade, multilayer printed circuit board and so on. The lasers used are mainly YAG lasers and CO2 lasers, and some excimer lasers, isotope lasers and diode pumped lasers.

7, laser heat treatment: widely used in the automotive industry, such as cylinder, crankshaft, piston ring, commutator, gear and other parts heat treatment, at the same time in aerospace, machine tool industry and other machinery industry is also widely used. Laser heat treatment inChinais much more widely used than abroad. Most of the lasers used are YAG lasers and CO2 lasers.

8, laser rapid prototyping: the combination of laser processing technology and computer numerical control technology and flexible manufacturing technology is used for mold and mold industry. Most of the lasers used are YAG lasers and CO2 lasers.

9. Laser coating: widely used in aerospace, mold and electromechanical industries. Most of the lasers used are high-power YAG lasers and CO2 lasers.

Laser processing provides a clean and pollution-free environment and production process for industrial manufacturing, and this is also the biggest advantage of laser processing nowadays.