Press conference held by the Chinese Academy of Sciences. It was announced at the conference that the Xi'an Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences developed the 26-watt industrial-grade femtosecond fiber laser with the highest single-pulse energy in China, and developed a series of ultra-fast laser extreme manufacturing equipment, realizing the air film hole of the turbine blade The "cold processing" breakthrough filled the domestic gap and reached the international advanced level.
This is undoubtedly a major breakthrough! In the field of aviation, aero engines have been hailed as "the pearl of the crown of modern industry", and their manufacturing level represents a country's technological, industrial and national defense capabilities. The engine blade is the first key part of the aero engine. It is located in the highest temperature, most complicated stress and the worst environment in the aero engine. Its casting process directly determines the performance of the aero engine.
Previously, due to the large gap between China's aircraft engine manufacturing technology and developed countries in the West, the turbine blades of the engine could not withstand higher temperatures, resulting in a serious lack of engine thrust. now. The emergence of "cold working" ultra-fast laser extreme manufacturing technology has greatly complemented the short board and enhanced the performance, life and reliability of the space engine.
According to researchers from the institute, the use of ultra-fast laser micromachining technology to punch holes on the blade surface and the formation of film cooling holes can effectively solve the problem of aero engine cooling under ultra-high temperature (1700 ° C) and ultra-high pressure conditions, and Ultra-fast laser micro-machining technology also breaks through the defects of recast layer, micro-cracks, recrystallization and other defects in the machining of air film holes of blades by traditional manufacturing methods.
To put it simply, this technique is similar to the laser surgery performed by patients with myopia, so that it can focus on a space area thinner than the hair, so that the cut surface is neat, no thermal diffusion, no micro-cracks during processing, and it will not affect The material next to the range causes no impact, and the technology has become the best choice for ultra-fine and low damage in aerospace, electronics and other fields.
It is worth mentioning that this technological breakthrough can not only be used in the high-end aerospace field, we will also see the application of this technology in future life, such as automobile engines. According to experts, some core indicators of this technology have been kept at the same level as the international advanced level, which can provide a comprehensive solution for the ultra-fine and "cold processing" of many difficult-to-machine materials and components.