Die device for creep age forming of large complex curvature component and design method

Abstract

The invention particularly provides a die device for creep age forming of a large complex curvature component and a design method. The method comprises the following steps that S1, a variable-thickness die profile is designed; S2, a die profile supporting base is designed, and the variable-thickness die profile is arranged on the die profile supporting base; S3, a component positioning assembly isdesigned, specifically, the positioning location is determined on the designed variable-thickness die profile, a threaded hole is formed in the designed variable-thickness die profile, a kidney-shaped through hole matched with the threaded hole is formed in the component, and a positioning stud is inserted into the kidney-shaped through hole and connected with the threaded hole; and S4, the partwith the kidney-shaped through hole is cut and removed after autoclave forming, and then the complex curvature component with the target curvature and size is obtained. The machined die profile has the variable-thickness characteristic, the positioning assembly is beneficial for preventing an aluminum alloy component from deviating due to uneven stress in the loading process, and precise forming of the complex curvature component is achieved.

Description

technical field [0001] The invention belongs to the technical field of creep aging forming of aluminum alloys, and in particular relates to a mold device and a design method for creep aging forming of large complex curvature components. Background technique [0002] Creep aging forming technology is to use the creep deformation and aging strengthening effect of aluminum alloy to obtain advanced sheet metal forming technology with high-precision shape and high-performance components. It is widely used in aerospace fields such as aircraft wings, cabins, and rocket fuel. Storage tanks, etc. Compared with traditional shot-peening and roll-bending processes, creep aging forming technology has the advantages of low residual stress of formed components, short production cycle and low cost, and is an ideal technology for precise forming of large and complex panels. On the one hand, for aluminum alloy components with large complex variable curvature and high forming stress, the curv...

AI Technical Summary

Problems solved by technology

For the manufacture of small mold surfaces with simple or complex curvatures, the milling process is usually used to process the springback-compensated design surfaces on the solid blank. For the manufacture of large complex curvature surfaces, this method will cause serious problems due to the excessive chord height. Material waste and high cost

[0004] In addition, in the prior art, the curvature of the contour curve of the rib support area of ​​the mold base is also constantly changing, which also increases the difficulty and cost of rib manufacturing

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