Number of aviation forgings

Number of aviation forgings
The number of aviation forgings refers to the number of forgings selected for aircraft and engines, excluding the total number of forgings. In many cases, forgings of the same drawing number may constitute multiple or even dozens of parts, such as fasteners and blade parts. Therefore, the number of installed forging items is always less than the number of installed parts made from the forging. The proportion of aviation forgings refers to the weight ratio of forgings in the total metal material consumption of the aircraft.
Due to aircraft and engine type, different types of aircraft and engine structure difference is big, so the number of aviation forgings and its share, can only explain forgings in the importance of a particular model of aircraft and engine, and don't tell the different types of aircraft and engine in forging number and proportion between there is a certain relationship. The performance of early aerial vehicles was poor, and forgings had only a few applications in aircraft and engines. Since the application of jet technology, the performance of aircraft has been rapidly improved. The number of forgings in aircraft and engines is increasing day by day, and its important influence on aircraft and engine performance is also significant. The relationship between the number of forgings and aircraft performance generally conforms to the following law: the better the aircraft performance, the more forgings, the more stringent the technical requirements for forgings.
In order to show the relationship between the number of aviation forgings and the performance of the aircraft, the analysis should be comparable with aircraft of similar use and type. At present, the thrust-weight ratio of gas turbine engine has reached more than 8, which requires more stringent requirements on the structural strength, stiffness and reliability of the engine. As the number of compressors and turbines increased, so did the number of forgings. On the gas turbine engine with thrust (afterforce state) above 98000kN and thrust-weight ratio of 8, the number of forgings has exceeded 1000. High temperature alloy forgings and titanium alloy forgings account for more than half of the total machine forgings by weight.

Performance is better on the aircraft, although the general trend of forging application is increasing, but with the development of CNC processing technology and free flow automatic machine tools and complete, some parts have begun to choose thick slab instead of forging, this momentum in the past. There is an increase in large parts usually made of forgings. The production and application of aviation forgings face the competition of more economical methods.
In addition, with the establishment of large forging equipment and the development of forging technology, the structural parts made of multiple forgings in the past may be replaced by a large integral forgings, so that the number of forgings will be reduced accordingly, and the total technical and economic benefits can be improved.
Therefore, the quantity concept of aviation forgings can only qualitatively explain the importance of forgings in aircraft and engines, and what really expresses its value is the performance, quality and economy of forgings.