Recently, a Shandong Electromechanical Technology Co., Ltd. and Zhao Zhenye, academician of the Chinese Academy of engineering, jointly developed and processed the newly developed domestic aero-engine bearing by using the company's haokeneng technology. The technical test proved that its fatigue life reached 22 times that of fag aero-engine bearing in Germany. Fag is subordinate to Schaeffler Group of Germany and is the top manufacturer of aeroengine bearings in the world. The report immediately aroused the strong interest of military observers. What kind of technology is hawker energy technology? Does it really have such a magical effect? Can it be applied to other defense science and technology fields? Based on the public information at home and abroad, this paper makes an analysis of the so-called Haoke energy technology. It is inferred from the analysis of public data that hawker energy is actually an ultrasonic surface strengthening technology. It introduces ultrasonic vibration into the surface strengthening process, realizes the complementary advantages of ultrasonic machining technology and traditional surface strengthening technology, and greatly improves the production efficiency of surface machining. Ultrasonic surface strengthening technology is also a new technology in the world
According to foreign data, France began the research on ultrasonic shot peening technology in 1996. In 1999, it first demonstrated ultrasonic shot peening strengthening equipment and was applied in the country's aerospace and atomic energy industry in the same year, but this technology is blocked from China's technology. According to the company, haokeneng technology improves the surface roughness of metal workpieces by three technical levels compared with traditional metal cutting methods such as turning and milling, up to Ra0 Below 2, the outer surface can reach the smooth surface; At the same time, the microhardness of the workpiece surface is increased by 20? On; Defects such as knife marks and stress concentration on the surface of the workpiece can not be seen; The corrosion resistance of the workpiece is increased by 40? The wear resistance is increased by 50? Come on. The company said that Haoke energy technology and equipment have been widely used in many fields of aerospace, such as the National Aerospace lunar exploration project, satellite manufacturing, aircraft, engine key parts manufacturing and so on
The residual stress control of welded components on aeroengines is very strict. There is a saying in the industry that aircraft can not be stressed to the sky. After more than ten months of performance tests, an aeroengine company in Shenyang has proved that Hawke can eliminate welding stress, and the equipment can fully meet the requirements for eliminating residual stress of aeroengine welding components, and can be applied to engine production and maintenance. After the casing of a turbofan engine is processed by hawkner technology, it not only improves the surface roughness of the workpiece and reduces the stress concentration point, but also eliminates the tensile stress at the key parts and presets the compressive stress of hundreds of MPA, which greatly prolongs its fatigue life and meets the requirements of long-life use. In the maintenance of submarines and ships, the parts often repaired by welding are also the most serious parts bearing fatigue load, seawater corrosion and so on. If these parts are not effectively relieved of residual stress after welding repair, the same damage will continue to occur in this part soon, and even the maintenance cycle will become shorter. The stress relief treatment with houckner technology can also greatly reduce the welding deformation and post welding cracking
For example, this technology is used in the maintenance of a nuclear submarine. After the stress relief treatment of hawker energy, the residual stress has been completely eliminated (the elimination rate of residual stress is above 99 °), and basically becomes an ideal compressive stress. A landing ship was returned to the factory for medium repair. During the sea test, there were many weld cracks at the welding repair parts and it was unable to deliver the ship. After using the Haoke energy to eliminate the welding stress equipment, no crack was found in the sea test again and the ship was delivered smoothly. The military users also praised the maintenance quality of the shipyard after use. Titanium alloy has been widely used in aviation, aerospace, ships, weapons and other fields because of its excellent properties, but the stress elimination of titanium alloy has always been a difficult problem. Haoke welding stress relief equipment has been widely used in titanium alloy weldments in China in recent years. The experimental results show that the fatigue limit of titanium alloy joint is increased by 64.5? The fatigue life is increased by 13.5 times; The welding residual stress is reduced by 85
The early warning aircraft radar produced by an electronic research institute in Nanjing adopts hawker stress relief equipment in its production and maintenance process, which greatly facilitates the local stress relief treatment after remote welding repair of large airborne radar. Because the military high-power three wheeled cross-country motorcycle produced by a military factory in Chongqing requires long-distance trouble free operation in harsh ground environment, the frame produced according to the existing production method can no longer meet the military requirements. Without increasing the material strength grade and material thickness, after the important welds of the frame are treated by using hawker stress relief equipment, The fatigue performance is greatly improved and successfully meets the acceptance requirements. Welded ammunition cartridges and cartridge cases are often scrapped due to cracks in their welds. After the welding of ammunition cartridges and cartridge cases, only hauck stress relief equipment is used to treat the welds once, so there will be no cracking again
Return to the aviation bearing introduced at the beginning of the article. According to relevant data, different from people's imagination, milligram energy technology does not improve the fatigue life of the bearing by strengthening the ball of the bearing, but by ultrasonic vibration strengthening the inner and outer raceways containing the ball of the bearing. At present, the technology to improve the strength of bearing raceway mostly adopts the method of heat treatment, such as forming a kind of diamond film on the ring parts by physical vapor deposition, or putting the dried bearing ring into nitriding furnace for quenching and tempering to improve the hardness. These conventional methods used to improve the strength of aeroengine bearings often have complex production process, high cost and limited improvement range. The houckner ultrasonic strengthening technology can not only make the strengthening of all parts of the raceway surface very uniform and avoid various problems caused by uneven strengthening, but also more importantly, the fatigue life of aviation bearing can be increased by 10 to 100 times, which is amazing
Academician Zhao Zhenye, a well-known expert in aviation metal materials in China, has incorporated Haoke energy technology into the anti fatigue manufacturing of aviation components. A large number of tests have proved that Haoke energy is by far the most advanced metal surface modification and strengthening technology, which organically combines improving the surface finish of components with metal surface modification, and greatly prolongs the fatigue life of aviation components. In a word, Haoke energy technology has been more and more widely used in the field of military products, and has solved many previously extremely difficult metal surface treatment problems
