Method for manufacturing large-curvature aluminum alloy integral wall board component

Abstract

The invention provides a method for manufacturing a large-curvature aluminum alloy integral wall board component. The method includes the steps that A, solution hardening is conducted on a wall board; B, the wall board obtained in the step A is arranged in a sealed environment formed by a thin film covering layer and a forming die jointly, the wall board is elastically deformed and plastically deformed in sequence under the vacuumized condition, and then the deformed wall board is obtained, wherein the temperature in the sealed environment where the wall board is located ranges from 15 DEG C to 35 DEG C, the vacuum degree ranges from -0.1 MPa to -0.05 MPa, and the treatment time ranges from 5 min to 60 min; C, in-situ creep stress relaxation aging is conducted on the deformed wall board obtained in the step B, wherein creep stress relaxation aging time is more than 2 h; D, unloading operation is conducted, and then the large-curvature aluminum alloy integral wall board component is obtained. When the method is used for manufacturing the large-curvature aluminum alloy integral wall board component, the residual stress of the product is greatly reduced, the strength of the product is improved, and the product with high forming accuracy and good performance is obtained.

Description

technical field [0001] The invention relates to the field of aluminum alloy thin plates, in particular to a method for preparing a large-curvature aluminum alloy integral wall plate member. Background technique [0002] Aerospace vehicles use large-curvature, thin-walled, high-reinforced aluminum alloy integral panel components (such as aircraft fuselage panels, rocket tank panels, and automobile body panels, etc.) The mechanical plastic deformation process of cold forming such as bending, and then its creep correction or manual correction to obtain the target product. However, cold forming processes such as roll bending and press bending can easily lead to low forming accuracy of components, local stress concentration, and tendon cracks or fractures. In such a scheme, when creep correction (also known as stress relaxation aging) is applied, the panel member needs to complete plastic deformation initially, so it is difficult to use a single forming tool to achieve high-stre...

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Problems solved by technology

Patent application CN201310711973 also provides an autoclave-based one-time forming method for aging-strengthening aluminum alloy integral wall panels, in which an autoclave is still used for forming, specifically, an autoclave is used to provide the aluminum alloy aging required The temperature and the pressure required for component molding make the material at the large curvature part reach the yield limit and undergo plastic deformation, and then maintain the molding state and enter the creep aging stage. The tank is an airtight container, and it is difficult to know whether the components are completely covered with film after pressurization

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