Before the successful development of China's 15,000-ton forging hydraulic press, there were only two 15,000-ton hydraulic presses in the world. One in Russia and one in Romania.
Compared with the existing hydraulic presses of over 10,000 tons at home and abroad, the newly developed 15,000-ton hydraulic press of Yizhong Group not only surpasses all existing hydraulic presses in terms of capacity, but also has an overall improvement in the level of mainframe structure and control system. It is the most advanced heavy-duty freedom in the world. Forging hydraulic press. When this hydraulic press is used for one year, people should pay more attention to it.
Revelation 1: The bold idea stems from the thick accumulation like the steamed steamed noodle. The forging hydraulic press is used for the forging process before the use of major equipment. Forging is not only a method of metal forming, but also an important means of forging metal internal defects, changing the internal flow lines of metals, and improving the mechanical properties of metals.
At the beginning of the 1960s, China's first 12,500-ton hydraulic press was built in the first half of the century in Qiqihar City. This hydraulic press was put into operation in 1964. The large forgings produced in the country are in a series of important fields such as steel, petrochemical, electric power, nuclear power and national defense. The total forgings account for half of the national similar products.
In 2002, due to a broken column of the forged 12,500-ton hydraulic press, Wu Shengfu, a doctor of engineering and domestic forging equipment development, proposed to develop a high-efficiency, high-precision, large opening distance, large compaction capacity, and improved material utilization. Replace it with a new 10,000-ton hydraulic press that reduces the processing cycle and reduces the total cost.
The group's leadership team quickly approved Wu Shengfu's proposal to develop a 15,000-ton free forging hydraulic press.
According to the data, there were 3 forging hydraulic presses of over 10,000 tons in China. In addition to one heavy, a 12,000-ton hydraulic press made by the Czech Republic was in the double, and another 12,000-ton hydraulic press jointly manufactured by Shangzhong and Jiangnan Shipyard was on the top. weight. The three hydraulic presses are all three-beam four-column structure. The forgings have poor precision, low mechanization level and low production efficiency.
Revelation 2: No accidental 10,000 tons of hydraulic press engineering is a complex system engineering involving almost all technical fields of the mechanical industry.
15,000 tons set a new record in large-scale unit design, large-scale casting, forging manufacturing, heat treatment technology for large components, as well as lifting, transportation, installation and commissioning. Among them, the largest steel castings have a net weight of more than 350 tons, and their casting, heat treatment, processing and lifting are unprecedented.
In this arduous development process, there are many memories that are precious.
Yu Zhaoqing, deputy director of China Yizhong Group Technology Center, introduced that all the development work of the hydraulic press machine from equipment selection, design scheme, technical parameter formulation, complete machine design, manufacturing, installation and commissioning is completed by a single technician. With all independent intellectual property rights, there are 4 innovations to make up for the defects of the 12,500-ton hydraulic press: the mainframe structure of the new full-prestressed composite frame has been developed, replacing the traditional structure of the three-beam and four-column; a new flat-adjustable gap guide has been developed. It replaces the non-adjustable cylindrical guiding method; the beam design of the whole structure avoids the possibility of damage of the combined beam; the new hydraulic press control system with the hydraulic compressor proportional control system and the programmable control system as the core is studied, which replaces the many years of use. Traditional manual operating system.
Revelation 3: The significance of innovation lies in the strength enhancement Recently, China Yizhong Group Corporation successfully used this hydraulic press to forge the world's first third-generation nuclear power belt straight section evaporator cone cylinder. As a key component of nuclear power plant construction, the cylinder was successfully forged once. It changed the original large forging cylinder without a straight table and then cutting it, which was both time-consuming and time-consuming.
According to a heavy statistics, 15,000 tons of hydraulic presses have produced nearly 30,000 tons of forgings, including nuclear power cylinders, reactor barrels, head plates, large rolls and other forgings. The annual output value is 2.853 billion yuan. Among them, in the production of hydrogenation cylinders, due to the increase of the upsetting capacity and the capacity of the reaming of the press, it saved 2 fires compared with the previous production; in nuclear power production, it greatly exceeded the forging of 312 tons of steel ingots. Forging 600 tons of large steel ingots and continuous forging; in the production of large power station rotors and backup rolls, due to the increase of press pressure and the improvement of compaction process and auxiliary parameters, it has saved 2 fires compared with previous production, and The rate is constantly increasing; in the production of large marine forgings, the production capacity is reduced by one fire. In 2007, the 15,000-ton hydraulic press won the “Special Award for Science and Technology Progress in Heilongjiang Provinceâ€.
Zhang Guobao, deputy director of the National Development and Reform Commission, said that the 15,000-ton hydraulic press has three meanings. First, Yizhong Group will be able to provide more high-quality and high-end products for national key projects and national defense construction. Second, it marks the overall level of China's equipment manufacturing industry. The third is that China has the hardware conditions for producing large-scale key forgings, which can greatly enhance the manufacturing capacity of China's electric power, metallurgy, petrochemical, shipbuilding, and aerospace industries, so that China has the right to speak in the world of forging.
Zhang Guobao believes that 15,000 tons of hydraulic presses will become the most critical equipment for extreme manufacturing in China. From then on, China's three generations of nuclear power, ultra-supercritical thermal power, large hydropower, giant ships, millions of tons of ethylene, 10 million tons of oil refining and other national economic construction and national defense security The large forgings required for key projects and important projects will no longer be “subject to peopleâ€.
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