Production status and development trend of large aircraft die forging parts

The main load-bearing components of aircraft and engines are mostly made of die forging parts, such as the load-bearing frame of aircraft body, main beam, landing gear, turbine disc, turbine shaft and blade of engine. These aviation die forgings are the "backbone" of the aircraft and its engine body structure. The structure type, the performance and quality of materials and the manufacturing cost directly determine the reliability, durability, flight life and cost of the aircraft to a large extent.


The materials of aviation die forging include: aluminum alloy, titanium alloy, superalloy, ultra-high strength steel, stainless steel, etc. The weight of the parts made by it accounts for about 20%-35% of the weight of the aircraft body structure and 30%-45% of the weight of the engine structure. It is the key parts of the aircraft and its engine body structure. Its structural form, material properties and quality, manufacturing cost is one of the important factors that determine the performance, reliability, life and economy of aircraft and engines.


In the development of aviation industry, reducing the structural weight of aircraft, enhancing the reliability and durability of the structure, shortening the manufacturing cycle of equipment and reducing the manufacturing cost have always been the important concepts of aircraft structure design and manufacturing, which makes the new generation of aviation die forging towards the trend of large size, integration and precision development.


Structural integration is one of the most striking trends in the design and manufacture of aircraft and engines. Minimizing the number of parts is one of the important technical ways for aircraft and engines to meet the requirements of higher safety and reliability, lighter structural weight, longer service life, lower cost and shorter manufacturing cycle. The integral design of structure will inevitably lead to the development of large die forging parts. Practice has proved that the integration of aviation die forging has the following advantages:


1, improve the overall rigidity of the component;


2. Reduce assembly errors and save machining time;


3, reduce the structural weight of the aircraft;


4. Reduce material consumption and save cost.

The production capacity and technical level of aviation large integral die forging is one of the important symbols of a country's comprehensive strength. The production of aviation large die forging relies on large forging equipment and advanced die forging technology, which complement each other. Equipment is the foundation, the process is the guarantee means. The development trend of aviation large die forging is: the use of advanced forging equipment to achieve the whole process of aviation large die forging production control, to provide large, precise, high life, high performance, low cost forgings for aircraft, which is also the development of advanced forging technology to pursue the goal.

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