Large integral disc-shaft forging piece formed by similar isothermal forging
A technology of isothermal forging and forging, which is applied in the field of large-scale overall disc shaft forgings. It can solve the problems of reduced productivity, difficult forming, and performance that cannot meet the requirements, and achieve excellent performance, excellent dimensional accuracy, and high dimensional accuracy.
Active Publication Date: 2010-06-30
GUIZHOU ANDA AVIATION FORGING
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Problems solved by technology
The use of this split disc shaft assembly not only increases the processing cycle and cost, reduces productivity, and is not easy to maintain, but also increases the weight of the engine due to the bolt connection, which is not conducive to reducing the weight of the engine structure and improving the thrust-to-weight ratio. It is not conducive to improving the reliability and life of the engine structure
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[0024] figure 1 It shows the longitudinal section structure of a large integral disc shaft forging formed by nearly isothermal forging along its center line. The upper part of the integral disc shaft forging is a disc body 1, and the lower part is a journal body 3. 3 is the transition zone 2. There is a circular upper positioning blind hole 2 in the center of the top surface of the disc body 1 b , the diameter of the blind hole is d 3 , the inclination is d, the height is h 1 ; There is a circular lower positioning blind hole 3 in the center of the bottom surface of the journal body 3 a , the radius of the blind hole is d 4 , the inclination angle is β, and the height is h 3 ; Wherein the diameter of disc-shaped body 1 is d 1 , the thickness is t 1 ; The transition zone 2 is a conical body structure, the diameter of the upper conical surface is d 5 , the diameter of the lower cone is d 6 , whose thickness is t 2 ; The journal body 3 is a conical body structure, and t...
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The invention discloses a large integral disc-shaft forging piece formed by similar isothermal forging, which solves the technical problems that the forging piece is rapidly formed when in forging and high-precision size and good texture and performance are obtained; the forging piece comprises a disc body and a shaft neck body, a transition region is arranged at the connecting part between the disc body and the shaft neck body, the center of the top disc surface of the disc body is provided with an upper locating blind hole matched with an upper locating block of a forging mold for forging the forging piece, and the center of the bottom surface of the shaft neck body is provided with a lower locating blind hole matched with a lower locating block of the forging mold; the dimensional proportion of the forging piece is that: when t1:t2:t3:h1:h3 is equal to 1:2:5:3.5:2.5, and d4:d2:d6:d5:d3:d1 is equal to 1:1.5:2:3.5:1.6:5, the structure is optimal. The forging piece is mainly used for the large integral disc-shaft forging pieces which are formed integrally, such as compressor discs and front shaft necks of aircraft engines.
Description
technical field [0001] The invention relates to a forging, in particular to a large integral disk shaft forging formed by nearly isothermal forging. Background technique [0002] The large forgings such as the compressor disc of the aero-engine and the front journal assembled with it are required to have excellent comprehensive performance due to the harsh working environment and complex stress. For some aero-engines currently developed and produced in China, the compressor disc and the front journal are assembled together after separate forging. For example, the three-stage compressor disc of an aero-engine uses TC17 titanium alloy forgings, and the front journal is made of TC4 titanium alloy forgings, and then the compressor disc and the front journal are assembled together with bolts. The use of this split disc shaft assembly not only increases the processing cycle and cost, reduces productivity, and is not easy to maintain, but also increases the weight of the engine du...
Claims
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Inventor 叶俊青夏欲民田云陈再鼎李艳英陈祖祥
Owner GUIZHOU ANDA AVIATION FORGING