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Creep age forming method for aluminium alloy plate

A creep aging forming and aluminum alloy plate technology, which is applied in the field of creep aging forming of aluminum alloy plates, can solve the problems of high chord components and molds being difficult to mold, and achieve the effects of saving test costs, improving probability and reducing usage.

Active Publication Date: 2017-07-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for creep aging forming of aluminum alloy plates to solve the technical problem that large-scale, high-chord members and molds are difficult to mold in the vacuum creep aging process of the prior art, and the method will not affect the late creep Adverse effects of aging

Method used

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  • Creep age forming method for aluminium alloy plate
  • Creep age forming method for aluminium alloy plate
  • Creep age forming method for aluminium alloy plate

Examples

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Embodiment 1

[0030] 1) Place the pretreated (solid solution, quenched) large integral tank wall member 2 (2650mm×1300mm×2.6mm) on the mold 1 that has been calculated for springback compensation (3200mm×1600mm×850mm, curvature Radius is 1430mm), and with the air felt, the lower surface of the wall panel and the surrounding parts of the upper surface are covered, and the coverage of the air felt 4 on the upper surface 21 of the member is 30mm along the edge distance from the outer periphery of the member;

[0031] 2) Use the mechanical loading device 3 containing two lower pressing heads 31 to bend the plate downward, the lower surface of the lower pressing head used to contact the component is a curved surface, and the radius of curvature of the lower surface of the lower pressing head is 1500mm , and the position where the lower pressure head is in contact with the component is the place where the air felt is not attached to the upper surface of the component. When the sum of the force valu...

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Abstract

The invention provides a creep age forming method for an aluminium alloy plate. The method comprises the steps as follows: a to-be-formed component is arranged on the molded surface of a mold firstly, and parts (the whole lower surface and the peripheral edge of the upper surface) of the component are covered with air-permeable felt; a plate is bent downwards by a mechanical loading device, and the mechanical loading device stops moving downwards after reaching the set force value; the load is unchanged, at least one circle of a sealant is sequentially bonded to the component and the edge of the mold, a vacuum bag is laid and bonded between the sealants, a closed space is formed, vacuum pumping treatment is performed, and the component is almost attached to the molded surface of the mold as far as possible or is kept to be attached to the molded surface of the mold; and then the mechanical loading device is detached, the component and the mold are placed into an autoclave for vacuum creep age forming, and the component and the mold are separated after ageing is completed. With the method, the time required for vacuum pumping is shortened, so that the forming efficiency is improved; less test materials are used, and thus the test cost is reduced; and the mold attaching error is reduced, and accordingly, the forming precision of the component is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy plate preparation, in particular to a creep aging forming method for an aluminum alloy plate. Background technique [0002] Large aluminum alloy integral wall panels are widely used in the aerospace industry, such as Airbus A380, wall panels of rocket fuel storage tanks, etc. In order to obtain excellent formability and performance at the same time, creep aging forming technology of formability co-manufacturing has been developed at home and abroad. This technology uses aluminum alloy to undergo creep deformation under the action of elastic stress within a certain temperature, so as to obtain the target component. The existing technology is mainly to pack the component and the mold with a vacuum bag, and use the method of vacuuming and air pressure to realize the lamination of the component and the mold, and then realize the formability through the regulation of temperature and pressure. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F1/02
CPCC22F1/02C22F1/04
Inventor 湛利华徐永谦汪凯刘健
Owner CENT SOUTH UNIV
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