With the rapid development of science and technology, laser technology with its unique advantages in the field of material processing has occupied an increasingly important position. Especially in high-precision cutting and welding, the application of laser technology has achieved significant results.
First, laser technology in the material processing of high-precision cutting
Laser cutting technology through high-energy laser beam irradiation of the material surface, so that the material quickly melted, vaporized or reached the ignition point, so as to achieve the material contactless cutting. Compared with the traditional mechanical cutting method, laser cutting has the advantages of fast speed, high precision, small heat-affected zone and small material deformation.
01 Focus position control technology
In the laser cutting process, the control of the focal point position is crucial for cutting accuracy. By precisely adjusting the focal depth of the focusing lens, the diameter of the focal spot can be made smaller, thus ensuring that the laser energy is highly concentrated and realizing high-precision cutting.
02 Cutting perforation technology
For thicker materials, it is necessary to first perforate a small hole in the plate and then utilize the laser beam to start cutting from the hole. In order to improve the perforation accuracy, pre-piercing technology can be used, i.e., small holes are pre-drilled in the material using mechanical or laser methods before laser cutting, so that the laser beam can accurately enter into the interior of the material.
03 Nozzle design and airflow control technology
In the process of laser cutting, oxygen and focused laser beam are shot to the cut material through the nozzle, forming an airflow beam. Reasonable design of the nozzle shape and airflow parameters can ensure that the oxygen and the laser beam are fully mixed to improve cutting efficiency; at the same time, sufficient airflow speed and momentum can be jet blown out of the molten material to reduce the heat-affected zone and material deformation in the cutting process.
Second, laser technology in the material processing of high-precision welding
Laser welding technology using high-energy laser beam as a heat source, by melting the material surface to achieve welding. Compared with the traditional welding method, laser welding has the advantages of narrow welding seam, small heat-affected zone, fast welding speed and small material deformation.
01 Welding parameter control technology
High-precision welding requires precise control of welding parameters, including laser power, focal length, focus diameter, pulse frequency and scanning speed. By reasonably adjusting these parameters, it can ensure uniform temperature distribution during the welding process, reduce the size of the heat-affected zone and improve welding precision.
02 Automation system
In high-precision welding, automation system plays a key role. Through the introduction of machine vision systems and machine learning algorithms, the laser welding machine is able to monitor the welding quality in real time and make automatic adjustments based on feedback. This self-adaptive capability ensures that every step of the welding process is performed within the specified accuracy range, thus improving welding quality and efficiency.
03 Material Adaptability
Different materials require different welding parameters and techniques. High-precision welding machines are often equipped with a variety of process parameter settings to accommodate a wide range of materials. For example, materials such as metals, plastics and ceramics require different energy densities and welding speeds during the laser welding process. This material adaptability is one of the key factors in ensuring successful high-precision welding.
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Third, application Cases
3C electronics industry
In the 3C electronics industry, laser technology is used in a large number of scenarios such as spot welding of charging cable plugs, spot welding of electronic component strips and fine cutting of ceramics. For example, when using QCW laser for charging cable plug spot welding, it can realize high-precision welding with the diameter of welding point less than 0.1mm; in electronic components strip spot welding, QCW laser can ensure that the copper strip is welded together and welded through without deformation; in ceramics fine cutting, the high peak power and low heat characteristics of QCW laser make the ceramics not easy to be heated and cracked.
Other Industries
In addition to the 3C electronics industry, laser technology has also been used in a large number of automotive manufacturing, aerospace, medical equipment and other fields. For example, in automobile manufacturing, laser cutting technology is used to cut body steel and parts; in the aerospace field, laser welding technology is used to manufacture aircraft fuselage and engine parts; in the field of medical devices, laser technology is used to manufacture high-precision surgical instruments and implants and so on.
In short, laser technology has obvious advantages in material processing to realize high-precision cutting and welding. Through continuous technological innovation and application expansion, laser technology will play an important role in more fields.
