High-efficiency laser processing technology
As a high and new technology, laser processing technology has always been a key support and promotion of the country. When the country formulates medium and long-term development plans, laser processing is also listed as a key supporting technology, which brings unprecedented opportunities for the development of laser processing technology. However, at present, there are still large gaps in domestic laser processing systems, such as the lack of high-grade laser processing systems, the failure of main lasers, and the large gaps in micro laser processing equipment, which need urgent improvement.
The Development of Laser Processing Technology in China China has developed very fast in laser processing technology. Since the 1970s, research and production of ruby ​​laser drilling have been carried out. In the 1980s, due to the earlier research on YAG laser crystals in China, it was better that YAG laser processing equipment for laser welding and hole drilling was used at the production site. At present, there are hundreds of thousands of laser welding, drilling, and drilling. Standard low power laser processing equipment is applied.
The application of medium- and low-power CO2 laser cutting equipment has also been applied more and more widely since the mid-1970s to the early 1980s. Due to the development of digitization, the development of laser vectorization of English, Chinese and graphics software, the technology has developed faster. Widely use advertising to reveal engineering, decoration, decoration and industrial processing manufacturing.
High-power CO2 lasers began research in the late 1970s and early 1980s. Application has been more and more widely used in welding, heat treatment and other fields. The improvement of low-order mode, high beam quality, and circular polarization state laser processing machine for high-power lasers from about 1000 W to 4000 W has seen rapid development in laser cutting since the 7th Five-Year Plan period. In addition, a large number of laser processing equipments in some advanced countries have entered China in large quantities, and most of the laser processing machine tools produced by some companies in China are in the development of several hundred million yuan annual output value. Because of the high technological content of high-power CO2 lasers, especially for high-power low-order mode cutting lasers are mainly imported, but there are already thousands of sets of laser processing laser manufacturing operations in China. There will be higher and faster development, and will catch up with advanced countries. In addition to high-power laser cutting, laser micromachining, fine-tuning, laser surface hardening, alloying, and laser cladding technology will also develop rapidly. Lasers and optoelectronics will become industrialized development. China will form several "optical valleys."
Application of laser technology
The development of industrial laser systems in the 1980s marked the beginning of the material processing revolution. Laser beams with high power density can melt any material in a blink of an eye without touching the workpiece or exerting any external force on the workpiece. This not only achieves high processing speeds, but also minimizes workpiece distortion and reduces wear. Today, lasers have become a common tool for cutting, welding and marking. TRUMPF is undoubtedly one of the world leaders in the production of industrial laser machine tools for such processing.
Laser cutting: The focused laser beam can cut through thick metal plates and can even cut the hardest material in nature – diamonds, just as easily as cutting textiles and cutting glass and wood.
The laser beam has been proved to be a first-class cutting tool, and has the following important advantages: no external force is applied to the workpiece during processing, the affected zone is very small, and any contour cutting with high precision and high speed can be performed regardless of the material thickness. And has excellent rim quality and narrow incisions. Laser welding: High power density focused laser beams can achieve welding applications that traditional techniques cannot achieve. The combination of high quality welding beam and high processing speed produces excellent productivity and efficiency.
Extremely low wear rates and high uptime are also one of the major advantages of laser systems. Other advantages of laser welding technology include: high penetration, excellent ratio of width to depth, and non-oxidizing and hermetic welding.
Laser drilling: Features of laser drilling include: short pulse width, rapid performance improvement and high pulse frequency, and high pulse stability.
This will ensure that the processed material will rapidly change from a molten state to a gasified state while minimizing the heat affected zone. In a drilling operation, this means that the melt can be effectively removed from the hole under pressure. Excellent beam quality can be used to cut fine slits up to 50 μm depths up to 25 mm deep.
Laser Mold Repair: The laser welding capabilities of solid-state pulse lasers significantly extend the process limitations of tool and mold repair. The laser energy accurately positions the high-energy beam at a point with a diameter of 0.2-0.8 mm (0.0078-0.031 in). This creates an unusually small welding band. The laser pulse width is 20 ms. Experienced operators typically use about 10 pulses per second.
With the laser, repairs at dead ends (such as inside) become possible. Therefore, the laser is fully capable of repairing equipment that cannot be repaired under normal conditions.
Laser cutting applications
Laser cutting is currently the most widely used laser processing technology in various countries. In many fields abroad, for example, automobile manufacturing and machine tool manufacturing use laser cutting to process sheet metal parts. With the continuous improvement of the beam quality of high-power lasers, laser cutting processes a wide range of objects, including almost all metal and non-metallic materials. For example, it is possible to use a laser to cut three-dimensional parts with complicated shapes for metal materials with high hardness, high brittleness, and high melting point, which is the advantage of laser cutting. For example, in the elevator industry, as well as metal cutting and punching in car roof decoration, welding of sidewalls and inner walls of elevator boxes, elevator parts and call boxes can be used for laser cutting and welding. In addition, high-power cutting equipment can be widely used in iron and steel metallurgy, automobile manufacturing, petrochemical, military and other industries. High-power laser welding equipment can also be used for laser hardening of all wearable bulk consumables such as various rollers, roller tables, saw blades, etc., which can greatly increase the service life of spare parts, reduce the consumption of spare parts, and increase the equipment operation rate. There is a demand for development in the market. This is a prerequisite. Low-power lasers have a high penetration rate, but the application threshold is very low. For example, the marking of a commodity mark, laser marking, but the use of a label can also be used for this function, and it cannot be replaced. Therefore, I think that the technical content of the company determines the strength and future of the company, especially the laser-based company.
From the point of view of various cutting techniques that people have today, laser cutting technology is undoubtedly the best cutting method. In addition to the features described above, laser cutting also has the advantages of low noise, no pollution, and the like. With the ever-increasing awareness of environmental protection and the decrease in the cost of manufacturing laser sources, laser cutting technology has become even more prominent. The use of laser cutting technology for traditional processing methods will become the trend of future development.
The development trend of laser cutting I think the main development direction of laser cutting is to pursue high efficiency and energy saving.
Because the laser power used for cutting does not increase indefinitely, it is mainly how to increase the processing efficiency within the existing power range. Biography is also a model of innovation in this area. For example, the perforation of the flight has achieved the zero-second perforation technology of the 8mm steel plate, so the processing efficiency has been improved. In addition, the controllable impulse piercing technology below 100mm by Baixu also reduces the user's processing time, improves the efficiency, reduces the thermal deformation, and brings a rich return to the customer. Because the processing time is shortened, the customer's operating costs will be reduced, and the investment will be recovered faster. This reflects the high efficiency. On the other hand, due to high efficiency can replace the traditional processing technology, such as punching and shearing process, traditionally think that the die for punching and cutting process can reach high speed, but high-efficiency laser cutting can also achieve this, so it will accelerate the replacement of the punching and shearing process. There is a fine plasma cutting process that will replace the high cost of cutting. Another highly efficient development trend is that new laser sources may be developed. This is also a new direction of research and development. At present, this technology already exists, but it is very expensive and has not yet been applied in the industrial field. However, this is also a potential development direction of laser cutting technology.
Everyone is now pursuing energy conservation and environmental protection, and they are all seeking different laser generation methods. Because the efficiency of the conversion of electrical energy into light energy is very low, if there is a breakthrough in this area, it can greatly save the user's operating costs. After all, electricity is getting more and more expensive. The more expensive the industrialized country is, the more expensive it is, and the more limited is its power generation. Therefore, this demand will increase. Therefore, there is still a lot to be achieved in energy conservation. Baixu has uniquely mastered DC and RF technologies to provide customers with the best solutions.
In addition, laser cutting applications are very extensive, textile machinery, rolling stock, electrical switches, elevators, construction machinery, food machinery, aerospace and other industries will use laser cutting technology.
In the future, the application of laser cutting will also develop in the direction of large benchtops and high power. In this regard, the international community has gone faster and the country is slowly catching up. In addition, the operation process is more convenient and more intuitive, which is also the direction of its development. Of course, this is also closely related to the CNC control system and software.
Hand in high-end to the world 
Once upon a time, the expensive price of imported laser cutting machines made people love and hate, making the laser cutting machine a high-end processing system that some large sheet metal processing companies can only care about. Since 2004, under the efforts of a group of outstanding domestic laser system manufacturers represented by Shanghai Unity Prima, Wuhan Huagong Falile, and Shenzhen Han Laser, China's self-produced laser cutting system has entered a period of rapid development and Formed the mainstream of the market, and gradually entered the international market since 2006. The domestic laser cutting system can achieve such a high rate of development and wide acceptance. The following factors play a key role:
First, based on international cooperation, develop entry-level models that are suitable for the needs of the Chinese market. Shanghai United Priam joint venture Italy Prima, Wuhan Hua Faolie purchase Australia Laserlab, these international cooperation, will introduce excellent laser cutting system integration technology and processing technology into, and developed a high stability, high flexibility, low for the Chinese market The cost of entry-level models.
Secondly, working together with Rofin's third-generation high-quality CO2 laser to achieve the high reputation of domestic laser cutting systems. Driven by manufacturers of mainstream laser cutting systems, CO2 slat lasers produced by Germany's Rofin Corporation have rapidly become the ultimate choice for laser cutting machines due to their excellent beam quality, long-term stability, and low operating costs. The preferred lasers have also achieved high stability and high reputation in domestic laser cutting systems.
In the end, the variety is complete to meet China's broad market applications. From two-dimensional laser cutting machine tools such as die-cutting plates, thin sheet metal, and medium-thickness plates, to pipe and even complicated three-dimensional workpieces, the five-axis laser cutting machine tool for laser cutting machines has almost all aspects of market applications. A reasonable price, a variety of available models, and different processing requirements of the user has a broad product selection space. At the same time, the application of linear motor technology, China's mainstream laser cutting machine tool manufacturers, is increasingly becoming a world-class manufacturer of high-performance laser cutting machine tools.
As a participant and promoter of the development of laser cutting machines in China, we are also witnessing the progress of laser cutting machines in China.
Laser cutting is currently the world's advanced cutting process. Its biggest advantage is that due to the small laser spot and concentrated energy, the cut kerf is small, there is no dross, there is almost no thermal deformation, and the cutting surface has a high degree of smoothness. Laser cutting is critical at the laser source. The thickness of the cut, the quality of the cut, and the stability of the cut depend on the performance of the laser source. A common CO2 industrial laser source uses an electric field or high-frequency oscillation to force the mixed gas sealed in the container to be in an excited state and generate stimulated radiation of monochromatic light which reciprocates between the mirror and the reflective mirror. Reflections, etc., accumulate enough energy to be emitted by the output lens. This laser source electrode is far from the workpiece and the electrode is mounted in the laser beam. The electrode is easily burned, carrier gas is consumed, and laser wavelength interferes. The high operating voltage (about 10 ~ 25kV) makes the operation unsafe. Laser sources are bulky, maintenance is more complex, and wearing parts are more expensive. The current state-of-the-art is a laser source that excites a mixed gas with a high-frequency resonant mode. This laser source electrode is located close to the workpiece and the electrode is mounted outside the laser beam. Compared with the common CO2 industrial laser source, the electrode is hardly burned, the carrier gas consumption is low, and the laser wavelength is not disturbed. Low operating voltage (about l ~ 1.2kV), the operation is very safe. The laser is small and maintenance is simple. Laser cutting due to high speed, high precision, must be controlled by high-speed computer-controlled cutting machine to match.
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