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Advantages of laser processing

What is laser processing

Laser processing is to use the energy of light to focus on the lens to achieve a high energy density at the focal point and process by photothermal effect. Laser processing does not require tools, the processing speed is fast, the surface deformation is small, and various materials can be processed. The laser beam is used to process various materials, such as drilling, cutting, dicing, welding, and heat treatment. Some substances with metastable energy levels will absorb light energy under the excitation of external photons, so that the number of atoms at high energy levels is greater than the number of atoms at low energy levels-the number of particles is reversed. The energy is equal to the difference between these two energies. At this time, stimulated radiation is generated and a large amount of light energy is output.

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Advantages of laser processing:

From the perspective of the application field of global laser products, the material processing industry is still its main application market, accounting for 35.2%; the communications industry ranks second, and its proportion is 30.6%; in addition, the data storage industry occupies third place , Its proportion is 12.6%.

Compared with traditional processing technology, laser processing technology has the advantages of less material waste, obvious cost effect in large-scale production, and strong adaptability to processing objects. In Europe, laser technology is basically used to weld special materials such as high-end car shells and bases, aircraft wings and spacecraft fuselages.

Laser processing is non-contact processing, and the energy and moving speed of the high-energy laser beam are adjustable, so it can achieve a variety of processing purposes. It can process a variety of metals and non-metals, especially materials with high hardness, high brittleness and high melting point. The laser processing flexibility is mainly used for cutting, surface treatment, welding, marking and drilling. Laser surface treatment includes laser phase hardening, laser cladding, laser surface alloying, and laser surface fusion.

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Laser processing technology mainly has the following unique advantages:

①Using laser processing, high production efficiency, reliable quality and economic benefits.

②The workpiece in the closed container can be processed through transparent media; in harsh environments or inaccessible places for other people, laser processing can be performed by robots.

③No "tool" wear and no "cutting force" act on the workpiece during laser processing.

④Can process a variety of metals and non-metals, especially materials with high hardness, high brittleness and high melting point.

⑤ The laser beam is easy to guide and focus to change in all directions, and it is easy to cooperate with the CNC system to process complex workpieces, so it is an extremely flexible processing method.

⑥No contact processing, no direct impact on the workpiece, so there is no mechanical deformation, and the energy of the high-energy laser beam and its moving speed are adjustable, so it can achieve a variety of processing purposes.

⑦In the laser processing process, the laser beam has high energy density, fast processing speed, and local processing. It has no or minimal impact on the non-laser irradiation site. Therefore, its heat affected zone is small, the workpiece thermal deformation is small, and the subsequent processing volume is small.

⑧ The divergence angle of the laser beam can be less than 1 milli-arc, the spot diameter can be as small as micrometers, the action time can be as short as nanoseconds and picoseconds, and at the same time, the continuous output power of high-power lasers can reach kilowatts to 10kW, Therefore, the laser is suitable for both precision micro-machining and large-scale material processing. The laser beam is easy to control, and it is easy to combine with precision machinery, precision measurement technology and electronic computers to achieve a high degree of automation in processing and a high processing accuracy.