For fighter jets, the scroll air compressor is a very important part of the engine. This device is usually used to continuously provide a large amount of high-compression air to the fighter engine combustion chamber to ensure the normal operation of the fighter engine. As a precision component, the scroll air compressor and exhaust gas turbine of a fighter jet are in continuous operation at high speed for a long time. Therefore, high enough machining accuracy is necessary for this kind of power compressor. Then, how to ensure the main machining accuracy of this key component? It turned out that the scroll air compressors of the fighter jets were cast one by one by the master craftsman himself producing the molds.
As an aviation industry that has extremely high requirements for parts, the way to produce engines is not to produce them in a fully automated way with robots. In order to improve the production accuracy of each part, aero-engine manufacturers usually use powder metallurgy to integrally form the parts to be produced. However, including scroll air compressors for aviation, most of an aero-engine All parts are all special-shaped parts. After the firing is completed, the mold cannot be removed without destructive treatment. Therefore, the production of aero-engines is mostly caused by the insufficient production speed of molds.
However, even if a high-precision one-time mold is used to lay a good foundation for the accuracy of the parts, this is only the beginning, and the corresponding parts need to undergo accurate measurements to ensure that the shape changes of the parts will not be too serious. The weight of the parts is up to par and the center of mass is in place, then further polishing is required to ensure that the parts sit where they should be without any issues.
