High-temperature alloy complex thin-wall part fluid medium forming die and high-temperature alloy complex thin-wall part fluid medium multi-pass forming method

Abstract

The invention discloses a high-temperature alloy complex thin-wall part fluid medium forming die and a high-temperature alloy complex thin-wall part fluid medium multi-pass forming method. A deep-cavity complex high-temperature alloy thin-walled part is taken as a research object, a three-pass fluid medium deep drawing forming process scheme is designed according to geometrical characteristics of the deep-cavity complex high-temperature alloy thin-walled part, namely, a cylindrical part is formed by a first pass fluid medium, in the second pass, on the basis of a large-size cylindrical blank, the fluid medium forms a transition part with a bottom small fillet feature, and in the third pass, the fluid medium forms a final part meeting the requirement. When the forming method is used for forming the deep-cavity type complex high-temperature alloy thin-wall part, the problems of low forming limit, low local small fillet feature forming precision and serious rebound caused by a traditional forming method can be effectively solved, local defects of the part are reduced, and the advantage is remarkable.

Description

technical field [0001] The invention belongs to the technical field of compound precision forming, and in particular relates to a fluid medium forming die and a multi-pass forming method of a high-temperature alloy complex thin-walled part, which can also be extended and applied to other parts with similar characteristics. Background technique [0002] Superalloys have high high temperature strength, good high temperature oxidation resistance and hot corrosion resistance under high temperature service environment conditions, and have good fatigue resistance, plastic toughness and other comprehensive properties. Aerospace engines are the power source of aircraft. Superalloys are widely used in the key parts of aerospace engines due to their excellent performance. They require long life and stable operation under high temperature, high speed, high load, complex stress state, and frequent alternating temperatures. , the working conditions are extremely harsh, and the reliabilit...

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Problems solved by technology

With the design and application requirements of new engines in the aerospace field, higher requirements are put forward for the complexity of engine parts. Some complex thin-walled superalloy parts with deep cavity curved surfaces and small rounded corners are widely used, further increasing In addition to the difficulty of manufacturing, the traditional forming method is likely to cause many problems such as poor dimensional accuracy, uneven structure, low forming limit, and obvious springback deformation. If the control is not good, defects such as warping, deformation or even cracking will easily occur, which brings great difficulties to the forming and manufacturing

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