Key words machine tool, aerospace industry | 2020-05-15 10: 57: 59 | Source Related chapters
On the evening of May 5, China's new-generation manned spacecraft test ship was equipped with the Long March 5B Yao-1 carrier rocket, which was successfully launched at the Haichang Wenchang Space Launch Site, and put the new-generation manned spaceship test ship into a predetermined orbit. This is the first time that a launch vehicle of more than 20 tons has been launched by a carrier rocket in China and even in Asia, and it is also a key step taken by China in the journey of building a powerful space nation. Aerospace is an important user field of high-end machine tools. Aerospace industry product parts are characterized by high temperature resistance, high strength, and difficulty in processing. At the same time, there are many alloy materials and composite materials, many complex structural parts, and high process requirements. This puts higher requirements on its processing equipment. In order to promote the development of the aerospace industry, in recent years, many domestic machine tool companies have gradually stepped into the field of aerospace users, to a certain extent, realize import substitution, and contribute to the national cause. The following only edits and organizes the information that 3 companies provide equipment and services for the Long March 5 based on public information.
Luoyang Bearing Research Institute Co., Ltd.
In this launching mission, the engine turbopump bearings of the Long March 5B Yao-1 carrier rocket were designed and manufactured by Luoyang Bearing Research Institute Co., Ltd. The turbo pump is a key component of a liquid fuel rocket engine. Its role is to send fuel and oxidant into the combustion chamber of the engine, similar to the heart of the human body. The bearings in the turbo pump are the core components of the turbo pump's support and rotation. Whether the bearing can be used safely and normally is the key factor for the rocket to be safely launched. Due to the special working conditions of the turbo pump bearings, in order to meet the special requirements of the Long March V launch vehicle, the shaft research institute conducted in-depth research and tests in many aspects such as bearing design, materials, processing and manufacturing technology and lubrication, and broke through many key technologies to In view of the relevant domestic blanks, the angular contact ball bearings and deep groove ball bearing products used in the turbo pump of the Long March 5 rocket engine were finally developed to provide support for this launch mission.
Wuhan Heavy Machine Tool Group Co., Ltd.
On November 3, 2016, the Long March V carrier rocket made its first successful flight at the Wenchang launch site in Hainan. It was the rocket with the largest carrying capacity and the highest thrust in China at that time. The huge fuel tank inside the long march rocket rocket body was welded by extra large special equipment made by Wuzhong. The lighter the weight of the rocket, the greater the carrying capacity. In order to maintain the figure, the "Long March 5" has been compared with the baht. The inner wall of the fuel tank is very thin, making it extremely difficult to process. The high design requirements mean that the processing and manufacturing requirements are higher, so Wuzhong Group has manufactured 5 meters-class tank bottom welding equipment. This set of equipment is composed of two sets of melon flap longitudinal seam tailor-welding system and fork ring and top cover ring seam tailor-welding system. The former is mainly used for the longitudinal seam welding between the bottom melon flaps of the "Changzheng No. 5" fuel tank, and the latter is mainly used for the circumferential seam welding between the fork ring, the melon ring and the top cover of the fuel tank bottom. Before the birth of the two sets of equipment, all the manufacturing processes of the launch vehicle fuel tanks were always completed by workers manual welding, labor intensity and long production cycle, the weld quality has always been hovering at a low level. With the use of automated tailor-made welding equipment manufactured by Wuzhong, the box bottom welding can be formed at a time, the production efficiency of a single tank box bottom has been improved by many times, and the welding seam forming quality is qualified once, achieving zero defects and zero defects.
Qiqihar Second Machine Tool (Group) Co., Ltd.
Ten years ago, Qier Machine Tool provided Changzhou V with a large rocket carrier girth welding assembly system for two years. The system is mainly used for processing rocket fuel tanks. The equipment integrates installation, positioning, milling and welding. It is a special equipment for processing the Long March No. 5 rocket. The assembly and welding system of the fuel tank's annular seam assembly manufactured by Qi'er Machine Tool is mainly used for welding the fuel tank body of the new generation large launch vehicle of Changzheng No.5. At that time, because the ring seam assembly welding system was the first and the first set in China, the manufacturing scale, difficulty and precision requirements of the equipment, for the ZI2 machine tool, belong to the extreme manufacturing, which was a very severe test. With the mutual assistance of the various departments of the group, the design, production and manufacturing of the product were finally completed, and the problem of welding fuel tanks at that time was solved.
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