High-power fiber lasers are suitable for processing steel with an absorption rate of more than 50 percent , but are limited by the fact that highly reflective metallic materials reflect 90 percent or more of the near-infrared (NIR) laser radiation incident on their surfaces. In particular, the welding of yellow metals such as copper and gold with NIR lasers is limited by the fact that the low absorption rate means that a large amount of laser power is required to initiate the welding process. As metal processing technology continues to advance and user requirements continue to increase, lasers need to innovate in terms of cost and energy efficiency as well as the performance of the laser system. The market demand for efficient processing of highly reflective metals has inspired the development of blue high power laser technology and is set to open the door to new technologies in metal processing. The following is an introduction to the application of blue laser welding technology in the welding of highly reflective metal materials.
Copper's absorption of blue light is more than 13×(13 times) higher than infrared absorption, in addition, the absorption rate does not change much when copper melts, once the blue laser starts welding, the same energy density will make the welding continue, the blue laser welding has inherent good control and less defects, the result is fast and high quality copper weld, the wavelength of the laser of 450 nm on the processing efficiency of the copper material than the wavelength of 1μm With a promising increase of nearly 20 times, the high-power blue laser offers quantitative and qualitative advantages over conventional near-infrared laser welding processes.
Highly reflective metals such as copper and gold absorb 7 to 20 times more in the blue light spectrum than in the infrared, and the solution lies in the use of shorter wavelengths of light in the blue light category for the industrial processing of non-ferrous metals. First, blue light has specific properties. Highly reflective metallic materials absorb blue light at a high rate, which means that blue light has a huge advantage for metal processing of highly reflective materials such as copper.
Secondly, the absorption rate does not change much when copper is melted. Once the blue laser starts welding, the same energy density will allow the welding to continue. Finally, blue laser welding has inherently good control and fewer defects, and the result is fast and high-quality copper welds. Ruifeng photoelectric laser focus on sixteen years of research and development technology and production, with many years of experience in laser equipment research and development, product technology is mature, product performance is safe and stable. The company follows the business philosophy of "technological innovation, product innovation, service innovation" to provide customers with the best quality products and services.
Blue swing composite welding technology is typically used for battery adapter welding. Adapter welding is an extremely important process in the power battery cell production process, play a role in connecting the cover plate and the role of the core, the quality of the weld directly affects the performance of the entire cell, first of all, in order to ensure that the weld needs to reach a certain area of the overcurrent capacity, and therefore will require the weld to achieve a certain width of the bonding surface. Secondly, the weld should not leave any spatters, so as to avoid short-circuiting inside the battery due to the particle, which will affect the safety performance of the battery.
The above is the application of blue laser welding technology in the welding of high anti-metal materials, in general, the blue laser improves the welding speed, which can be directly translated into faster production efficiency, as well as minimize the production downtime; the consistency of the weld quality can greatly improve the production yield rate; spatter-free and non-porous high-quality weld, as well as higher mechanical strength and lower electrical resistivity, and other unique advantages to broaden the scope of the process. The process range is broadened.
In addition, the blue laser can also perform heat-conducting welding modes, which are not possible with near-infrared lasers. As a modern advanced processing technology, blue oscillating composite welding technology creatively solves the laser processing problems in many industries, greatly improves the product quality of downstream customers, and will be widely used in new energy batteries, consumer electronics, motors, motors, transformers and many other fields, resulting in significant economic and social benefits.
