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

An integral wallboard and aluminum alloy technology, which is applied in the field of aluminum alloy thin plates, can solve problems such as the difficulty of knowing components, and achieve the effects of suppressing the width of the strip, improving product strength, and high forming accuracy

Active Publication Date: 2015-03-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0029]The present invention will be further explained by specific examples below, but the scope of the present invention is not limited thereto.

[0030] This example provides an aluminum alloy panel (2219 aluminum alloy) that can be used to prepare large-curvature aluminum alloy integral panel components. Its composition is shown in Table 1. The total size of the panel is 935mm×288mm. The specific structure is as follows figure 1 Triangular mesh panels shown. figure 1 The 6 small rectangles in the figure represent six test samples 1 to 6 for mechanical performance testing, of which 7 to 12 are test samples of reinforcing ribs at different positions.

[0031] In this embodiment, the target curvature radius of the component is 1620±5 mm, and the curvature radius of the inner concave surface 221 of the forming mold used is 1405 mm.

[0032] Table 1

[0033]

[0034] In step A, the solid solution temperature is 490-550°C, and the solid solution time is 40min-1h; and within 1...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D5/00C22F1/04
CPCB21D26/027B21D26/031C22F1/05C22F1/057
Inventor 湛利华徐永谦周世杰祝世强李杰王萌杨有良冯静文
Owner CENT SOUTH UNIV
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