Forging production is one of the main ways to provide mechanical parts blanks for various industries. The advantage of forging production is not only to obtain the shape of mechanical parts, but also to improve the internal structure of materials and mechanical properties. Generally speaking, for the important mechanical parts with large force and high mechanical performance, forging is often used.
The weight of forging parts on aircraft accounts for 70%, on tank 60%, and on automobile 50%. It can be seen from these examples that forging plays an extremely important role in industry.
Aluminum alloy has a series of advantages, such as small specific gravity, large specific strength and small specific stiffness, which is widely used in various industrial sectors. All kinds of forgings that can be forged with low carbon steel can be forged with aluminum alloy. Aluminum alloy can be forged on forging equipment such as forging hammer, mechanical press, hydraulic press, upsetting machine, reaming machine, etc. it can be forged freely, die forging, roll forging, upsetting, roll forging and reaming.
Generally speaking, the size is small, the shape is simple, and the deviation requirements for aluminum forgings are not strict. It can be easily forged on the hammer, but for aluminum forgings with large specifications and serious deformation requirements, it is advisable to select water (liquid) forging. For large and complex aluminum forgings, large die forging hydraulic press must be used for production. For large-scale precision rings, precision ring rolling machine should be used for rolling forging. Especially in the past ten years, with the progress of science and technology, the development of national economy, materials put forward higher and higher requirements, forcing the development of large-scale integration of aluminum alloy forgings, high strength, high toughness, complexity and accuracy, greatly promoting the development of large and medium-sized hydraulic press and ring forging machine.
With the development and modernization of transportation industry, the demand for high-speed and light-weight transportation is becoming more and more intense, and the demand for steel and aluminum is growing, especially for aircraft, spacecraft, railway vehicles, underground railway, high-speed railway, freight vehicles, automobiles, boats, ships, artillery, tanks and mechanical equipment, as well as other important mechanical parts and structures, The widely used aluminum and aluminum alloy forgings and forgings replace the old steel structure, such as aircraft structure, almost all of which are aluminum alloy die forgings; automobile hub, bumper, girder (especially heavy vehicles, large and medium buses); tank weight wheel; battery rack; helicopter moving and fixing ring; train cylinder and piston skirt; woodworking machinery fuselage; The frame, guide rail and drum of textile machinery are all aluminum alloy die forgings. In addition, these trends are developing so rapidly that some aluminum alloy castings are being replaced by aluminum alloy die forgings.
At present, there are few large forging hydraulic presses in the world and even fewer in China. With the modernization of national defense industry and the development of civil industry, especially the development of transportation industry, the variety and output of aluminum alloy die forgings can not meet the needs of the domestic market, and there is a big gap in the international market. Therefore, it is necessary and timely to build many large and medium-sized aluminum alloy forging production lines.
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