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Creep age forming method for large thin-wall component

A technology of creep aging forming and thin-walled components, which is applied in the field of thin-walled component manufacturing, can solve problems such as buckling instability of large thin-walled components, and achieve the effect of suppressing local buckling instability and reducing weight

Active Publication Date: 2020-05-26
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for creep aging forming of large thin-walled components to solve the problem of local buckling instability of large thin-walled components in the process of bending creep aging forming proposed in the background art

Method used

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Embodiment 1

[0027] The invention provides a creep aging forming method of a large thin-walled component, which is described by taking a large thin-walled double-curvature component as an example.

[0028] S1, firstly cut out the aluminum alloy sheet material with a thickness of 5mm and a grade of 2219 from the factory. The cut component sheet 1 can contain the component expansion body 11. It is an isosceles trapezoidal plate of 1394mm. Such as figure 1 shown. Mark the area of ​​the component expansion body 11 in the component sheet 1, reserve a circle of 50 mm wide outer mesh area 112 inward along the edge of the area of ​​the component expansion body 11, and carry out the internal mesh area 112 of the component expansion body. Milling, milling to 3 mm to form a 2 mm thick thinned area 111 . The side of the component plate 1 that has been milled is the thinned surface 1a, and the side of the component plate 1 that has not been milled is the non-thinned surface 1b. The overall area of ...

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Abstract

The invention discloses a creep age forming method for a large thin-wall component. The method comprises the following steps that firstly, an aluminum alloy blank is cut into a component plate containing a component unfolding body; a metal plate is cut into an auxiliary plate with an outer contour consistent with an outer contour of the component plate; the component plate and the auxiliary plateare tightly attached and fixed to form a reinforcing plate; the reinforcing plate is placed on a mold face, and the reinforcing plate is completely coated with ventilated felt; a sealant is pasted onthe edge portion of a mold, and a vacuum bag is pasted on the sealant so as to make the vacuum bag and the mold jointly form a closed space; the closed space is vacuumized to make the reinforcing plate be close to or keep attached to the mold face; the reinforcing plate and the mold are put into an autoclave for vacuum creep age forming, and after completion, the component plate, the auxiliary plate and the mold are separated; and an allowance plate is milled. According to the method, precise shape and property integrated forming of the large thin-wall component can be achieved, and a local buckling instability condition of the component with the weak rigidity in the creep age forming process is effectively restrained.

Description

technical field [0001] The invention relates to the technical field of manufacturing thin-walled components, in particular to a creep aging forming method for large thin-walled components. Background technique [0002] Thin-walled components with large complex curved surfaces are widely used in the aerospace industry, and their quality and performance directly affect the reliability of related products. In order to obtain the excellent formability of the hyperbolic thin-walled member at the same time, the creep aging forming technology of formability co-manufacturing has been developed at home and abroad. Creep age forming technology is mainly based on material creep and aging properties, which is safe, repeatable and capable of meeting formability requirements when producing wall panel parts. First of all, the workpiece is elastically deformed by a certain loading method at room temperature, and this deformation is maintained; then it is put into the heating equipment toge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D31/00
CPCB21D31/005
Inventor 湛利华彭南辉喻吉望
Owner CENT SOUTH UNIV
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