China's development and production of new high-speed trains, ships and large aircraft requires a large number of high-end materials as a support, in which the production of large aluminum profiles is undoubtedly an important part. Therefore, as soon as possible, we have developed and developed high-tech aluminum extrusion and tensile straightening equipment with high technology content in China, and accelerated the promotion of our own large-scale aluminum production advanced equipment, which is currently placed in a very urgent need in China's equipment manufacturing industry. task.
Modern industries are in urgent need of important materials such as large-scale aluminum materials. The so-called large-scale aluminum profiles mainly refer to aluminum profiles with a width of more than 800 mm and a circumscribed circle diameter of more than 250 mm and a delivery length of more than 12 meters. Large aluminum profiles with complex cross-sections and lengths of up to 60 meters are multi-functional assemblies that can achieve the same precision of general machined products and are used as critical structural materials for critical parts of machines. Since one large aluminum profile can replace the wide thin-walled aluminum structural member that was previously made up of two or more aluminum profiles, the structure of the mechanical component becomes more reasonable and a complete component surface is obtained. At the same time, the production of large aluminum profiles can increase extrusion productivity and save money. Therefore, the production of new high-speed trains, ships and large aircraft, if not for the support of large aluminum profiles, its so-called "Made in China" is empty talk. What's more, large aluminum profiles are not only necessary for the production of new high-speed trains, ships, and large aircrafts, but also important materials that are urgently needed in various aspects of China's current rapid economic development. The manufacture of modern transportation equipment such as subways and light rails is also an important material for the development of modern weapons production and aerospace industries in national defense construction.
In recent years, due to the development of China's subway, high-speed trains, urban light rail, aerospace and other industries, it is used in aircraft siding, high-speed train bodies, subways and urban light rail trains, maglev train bodies, containers, and shipboard sidings. The demand for thin-walled, wide-width, high-precision, and complex sections of aluminum alloy profiles has grown rapidly. In the “Eleventh Five-Year Planâ€, the state will invest 200 billion yuan in the construction of subways in major cities in China. The newly manufactured subway cars will all be made of extra large aluminum alloy profiles. According to relevant predictions, in the next five years, the demand for China's extra large aluminum profiles and aluminum alloy profiles will be over 150,000 tons. If imported from abroad, the price will be around US$10,000 per ton.
Large extrusion equipment has a huge market potential Although there are many types of extrusion machines, internationally, extruders with a size of more than 50 MN are generally called large-scale extruders, and extruders with a capacity of 80 MN or more are called heavy-duty extruders. At present, the total volume of large-scale extrusion presses produced at home and abroad exceeds 40 sets. The equipment of large-scale extrusion presses abroad is basically produced before the 1970s. Most of them are hydraulic presses and the technology is backward. In recent years, four to five large extruders have been added to the United States, Germany, Japan, and South Korea. There are seven large-scale aluminum extrusion production lines currently in operation in China, and five large aluminum extrusion press production lines are under construction. In the past five years, China will also build more than 10 large-scale extrusion press production lines. Large-scale extruders have a potentially huge market in China, and they have also shown an upward trend in demand abroad. For countries such as Southeast Asia and India, the development of large-scale extruders is still in its infancy. However, it is estimated that there will be several large-scale extrusion press production lines within 10 years. The research and development of large-scale aluminum profile extrusion equipment has always attached great importance to the developed countries. Many countries have successively established relevant technology research centers. Among them, the famous BCTiin extrusion technology center in Germany, the KENTCKY extrusion technology center in the United States, and the UK HYDRO extrusion technology research and engineering technology research center. China started late in the research and development of large aluminum extrusion technology and equipment. Not only did the research methods and methods lag behind foreign countries, but they also lag behind foreign countries in terms of human and financial resources.
In the research and development of large-scale aluminum profile equipment, the China Heavy Machinery Research Institute (Xi'an Heavy Machinery Research Institute) and Taiyuan Heavy Industry Co., Ltd. are at the leading position in China. From 1999, China Heavy Machinery Research Institute began to develop China's first hydraulic transmission 10,000 tons extrusion production equipment, put into production on July 1, 2002. In 2003, the institute began to develop the 125MN hydraulic double-acting aluminum extrusion production line, which has been installed and commissioned, which has made a major breakthrough in the development of large-scale aluminum profiles and the development of new products. So far, the institute has designed and developed more than 30 5MN to 125MN copper/aluminum extrusion machine production lines. For example, the 125MN double-acting aluminum extrusion press developed by the company is the world's largest direct-drive aluminum extrusion press, and the 40MN double-acting copper extrusion press production line is currently the larger copper extrusion production line in Asia. At the same time, the Institute also developed 55MN, 60MN, 100MN and 125MN aluminum extrusion production line rear processing equipment, and 150MN aluminum extrusion production line is under development.
The foundation of technology research and development and industrialization needs to establish a large-scale aluminum profile isothermal extrusion technology process is the control basis for the production of high performance large aluminum profiles. Our country has studied and established the calculation formulas of heating energy, heating power and air cooling capacity required for large aluminum extrusion chambers; established a three-dimensional thermal coupling finite element analysis model for the extrusion process of large aluminum extrusions, and solved the reasonable boundary conditions. The problem is dealt with; the isotherm extrusion speed curve for large wide plates and large profiled fin tubes is proposed; and the technical route for the isothermal extrusion process of large aluminum profiles based on temperature and speed control is proposed. In addition, in the large aluminum profile fixed pin extrusion technology, large aluminum profile extrusion technology, large-scale short-range extrusion equipment technology, large-scale aluminum profile rapid cooling technology, large aluminum profile traction technology, stretching and correction technology, etc. There was a major breakthrough, and the 10,000-ton double-acting aluminum extruder won the first prize for national science and technology progress. However, compared with the advanced technologies of developed countries, China's large aluminum extrusion equipment still has a certain gap. For example, aluminum profile isothermal extrusion technology involves the control system of the extrusion process. Computer finite element analysis software has been used in foreign countries to transfer heat between aluminum billets, extrusion tools, and extrusion cylinders during extrusion and aluminum ingots. The digital simulation of the stress change during billet formation has led to the automatic control of the extrusion process, resulting in advances in the production and quality control of aluminum profiles, and the development of an automatic control system for extruded aluminum profiles with optimized extrusion parameters.
At present, the world's major extrusion machine manufacturing companies have their own aluminum extrusion process control systems, such as Italy, Germany, France, the United States, Japan and other countries have their own unique technology companies. Compared with foreign countries, China still has obvious shortcomings (see related links for details). At present, China's economy is developing rapidly. The demand for large-size aluminum profiles is increasing and the quality level requirements are getting higher and higher. In particular, the country has now focused on the production of large-scale transport aircraft and large passenger aircraft. Large-scale aircraft and other types of aircraft, most of which use high-end, large-size aluminum profiles, have their skeletons and fuselage. Therefore, in order to meet the requirements of this situation, it is a very urgent and arduous task to develop, develop, and popularize large aluminum extrusion presses in China as soon as possible. Therefore, relevant parties in the country should attach great importance to research and development in this area, provide support from policies, and give financial support. At the same time, relevant parties should quickly organize relevant human, material, and financial resources based on China's current situation in the research and development of extruders, and establish China's large-scale aluminum profile technical equipment research and development center. In addition, in accordance with the needs of China's economic development, there should be plans and targeted training to develop, develop, and produce large aluminum profile bases with advanced international standards.
Modern industries are in urgent need of important materials such as large-scale aluminum materials. The so-called large-scale aluminum profiles mainly refer to aluminum profiles with a width of more than 800 mm and a circumscribed circle diameter of more than 250 mm and a delivery length of more than 12 meters. Large aluminum profiles with complex cross-sections and lengths of up to 60 meters are multi-functional assemblies that can achieve the same precision of general machined products and are used as critical structural materials for critical parts of machines. Since one large aluminum profile can replace the wide thin-walled aluminum structural member that was previously made up of two or more aluminum profiles, the structure of the mechanical component becomes more reasonable and a complete component surface is obtained. At the same time, the production of large aluminum profiles can increase extrusion productivity and save money. Therefore, the production of new high-speed trains, ships and large aircraft, if not for the support of large aluminum profiles, its so-called "Made in China" is empty talk. What's more, large aluminum profiles are not only necessary for the production of new high-speed trains, ships, and large aircrafts, but also important materials that are urgently needed in various aspects of China's current rapid economic development. The manufacture of modern transportation equipment such as subways and light rails is also an important material for the development of modern weapons production and aerospace industries in national defense construction.
In recent years, due to the development of China's subway, high-speed trains, urban light rail, aerospace and other industries, it is used in aircraft siding, high-speed train bodies, subways and urban light rail trains, maglev train bodies, containers, and shipboard sidings. The demand for thin-walled, wide-width, high-precision, and complex sections of aluminum alloy profiles has grown rapidly. In the “Eleventh Five-Year Planâ€, the state will invest 200 billion yuan in the construction of subways in major cities in China. The newly manufactured subway cars will all be made of extra large aluminum alloy profiles. According to relevant predictions, in the next five years, the demand for China's extra large aluminum profiles and aluminum alloy profiles will be over 150,000 tons. If imported from abroad, the price will be around US$10,000 per ton.
Large extrusion equipment has a huge market potential Although there are many types of extrusion machines, internationally, extruders with a size of more than 50 MN are generally called large-scale extruders, and extruders with a capacity of 80 MN or more are called heavy-duty extruders. At present, the total volume of large-scale extrusion presses produced at home and abroad exceeds 40 sets. The equipment of large-scale extrusion presses abroad is basically produced before the 1970s. Most of them are hydraulic presses and the technology is backward. In recent years, four to five large extruders have been added to the United States, Germany, Japan, and South Korea. There are seven large-scale aluminum extrusion production lines currently in operation in China, and five large aluminum extrusion press production lines are under construction. In the past five years, China will also build more than 10 large-scale extrusion press production lines. Large-scale extruders have a potentially huge market in China, and they have also shown an upward trend in demand abroad. For countries such as Southeast Asia and India, the development of large-scale extruders is still in its infancy. However, it is estimated that there will be several large-scale extrusion press production lines within 10 years. The research and development of large-scale aluminum profile extrusion equipment has always attached great importance to the developed countries. Many countries have successively established relevant technology research centers. Among them, the famous BCTiin extrusion technology center in Germany, the KENTCKY extrusion technology center in the United States, and the UK HYDRO extrusion technology research and engineering technology research center. China started late in the research and development of large aluminum extrusion technology and equipment. Not only did the research methods and methods lag behind foreign countries, but they also lag behind foreign countries in terms of human and financial resources.
In the research and development of large-scale aluminum profile equipment, the China Heavy Machinery Research Institute (Xi'an Heavy Machinery Research Institute) and Taiyuan Heavy Industry Co., Ltd. are at the leading position in China. From 1999, China Heavy Machinery Research Institute began to develop China's first hydraulic transmission 10,000 tons extrusion production equipment, put into production on July 1, 2002. In 2003, the institute began to develop the 125MN hydraulic double-acting aluminum extrusion production line, which has been installed and commissioned, which has made a major breakthrough in the development of large-scale aluminum profiles and the development of new products. So far, the institute has designed and developed more than 30 5MN to 125MN copper/aluminum extrusion machine production lines. For example, the 125MN double-acting aluminum extrusion press developed by the company is the world's largest direct-drive aluminum extrusion press, and the 40MN double-acting copper extrusion press production line is currently the larger copper extrusion production line in Asia. At the same time, the Institute also developed 55MN, 60MN, 100MN and 125MN aluminum extrusion production line rear processing equipment, and 150MN aluminum extrusion production line is under development.
The foundation of technology research and development and industrialization needs to establish a large-scale aluminum profile isothermal extrusion technology process is the control basis for the production of high performance large aluminum profiles. Our country has studied and established the calculation formulas of heating energy, heating power and air cooling capacity required for large aluminum extrusion chambers; established a three-dimensional thermal coupling finite element analysis model for the extrusion process of large aluminum extrusions, and solved the reasonable boundary conditions. The problem is dealt with; the isotherm extrusion speed curve for large wide plates and large profiled fin tubes is proposed; and the technical route for the isothermal extrusion process of large aluminum profiles based on temperature and speed control is proposed. In addition, in the large aluminum profile fixed pin extrusion technology, large aluminum profile extrusion technology, large-scale short-range extrusion equipment technology, large-scale aluminum profile rapid cooling technology, large aluminum profile traction technology, stretching and correction technology, etc. There was a major breakthrough, and the 10,000-ton double-acting aluminum extruder won the first prize for national science and technology progress. However, compared with the advanced technologies of developed countries, China's large aluminum extrusion equipment still has a certain gap. For example, aluminum profile isothermal extrusion technology involves the control system of the extrusion process. Computer finite element analysis software has been used in foreign countries to transfer heat between aluminum billets, extrusion tools, and extrusion cylinders during extrusion and aluminum ingots. The digital simulation of the stress change during billet formation has led to the automatic control of the extrusion process, resulting in advances in the production and quality control of aluminum profiles, and the development of an automatic control system for extruded aluminum profiles with optimized extrusion parameters.
At present, the world's major extrusion machine manufacturing companies have their own aluminum extrusion process control systems, such as Italy, Germany, France, the United States, Japan and other countries have their own unique technology companies. Compared with foreign countries, China still has obvious shortcomings (see related links for details). At present, China's economy is developing rapidly. The demand for large-size aluminum profiles is increasing and the quality level requirements are getting higher and higher. In particular, the country has now focused on the production of large-scale transport aircraft and large passenger aircraft. Large-scale aircraft and other types of aircraft, most of which use high-end, large-size aluminum profiles, have their skeletons and fuselage. Therefore, in order to meet the requirements of this situation, it is a very urgent and arduous task to develop, develop, and popularize large aluminum extrusion presses in China as soon as possible. Therefore, relevant parties in the country should attach great importance to research and development in this area, provide support from policies, and give financial support. At the same time, relevant parties should quickly organize relevant human, material, and financial resources based on China's current situation in the research and development of extruders, and establish China's large-scale aluminum profile technical equipment research and development center. In addition, in accordance with the needs of China's economic development, there should be plans and targeted training to develop, develop, and produce large aluminum profile bases with advanced international standards.