One-time forming method of non-aging strengthened aluminum alloy integral wall plate based on autoclave

An aging-strengthening, integral wall panel technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve problems such as increasing production costs and cycles, large residual stress of workpieces, and reducing workpiece performance, so as to eliminate the problem of uneven performance and improve performance. Performance uniformity, the effect of reducing the production cycle

Inactive Publication Date: 2016-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional forming route, annealing after cold deformation is likely to cause recrystallization and seriously reduce the performance of the workpiece. In addition, there is a large residual stress inside the formed workpiece, and an additional process for eliminating residual stress is required, which increases the production cost and cycle time.

Method used

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  • One-time forming method of non-aging strengthened aluminum alloy integral wall plate based on autoclave
  • One-time forming method of non-aging strengthened aluminum alloy integral wall plate based on autoclave
  • One-time forming method of non-aging strengthened aluminum alloy integral wall plate based on autoclave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The siding material is 5A06 aluminum alloy hot-rolled plate, the length of the slab is 800mm, the width is 200mm, and the thickness is 10mm. The target shape surface is continuously distributed along the length direction of the wall plate with a bending radius of 800 mm to 15000 mm, showing a streamlined shape. The mold surface includes a large curvature range: R / t=80~90, a small curvature range: R / t=130~1500, and an intermediate curvature range: R / t=90~130.

[0024] First place the slab on the forming mold and fix it, then apply a vacuum film to make the mold and the slab in a vacuum-enclosed environment, and then put it into the autoclave. Raise the temperature in the autoclave to 350°C, and increase the pressure in the tank to 5 Bar to make the slab and the mold fit together. At this time, the material reaches the yield limit at the large curvature part and undergoes plastic deformation. After keeping for 2 hours, the pressure in the tank dropped to 2Bar, and the te...

Embodiment 2

[0026] The wall plate material is 5052 aluminum alloy cold-rolled plate, the length of the slab is 1800mm, the width is 900mm, and the thickness is 8mm. The target shape surface along the length direction of the wallboard is ellipse with long and short semi-axes of 378mm and 126mm respectively, and the width direction is straight without bending. The mold surface includes a large curvature range: R / t=0~172, a small curvature range: R / t>260, and an intermediate curvature range: R / t=172~260.

[0027] First place the slab on the forming mold and fix it, then apply a vacuum film to make the mold and the slab in a vacuum-enclosed environment, and then put it into the autoclave. Raise the temperature in the autoclave to 345°C, and increase the pressure in the tank to 4Bar to make the slab and the mold fit together. At this time, the material reaches the yield limit at the large curvature part and undergoes plastic deformation. After keeping for 2 hours, the pressure in the tank dro...

Embodiment 3

[0029]The wall plate material is 5083 aluminum alloy O-state plate, the length of the slab is 1000mm, and the width is 580mm. The thickness of the web is 3mm, and ribs with a height of 15mm and a thickness of 4mm are provided on one side of the web. The ribs have a rectangular cross-section and are distributed in a grid. There are 9 cells in total, and the size of each cell is 300mm×160mm. The target shape surface along the width direction of the wall panel has a single curvature radius of 800mm, R / t=44.4, which belongs to the large curvature range.

[0030] First place the slab on the forming mold and fix it, then apply a vacuum film to make the mold and the slab in a vacuum-enclosed environment, and then put it into the autoclave. Raise the temperature in the autoclave to 400°C, and increase the pressure in the tank to 5 Bar to make the slab and the mold fit together. At this time, the material reaches the yield limit at the large curvature part and undergoes plastic deform...

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Abstract

The invention relates to a one-time forming method of a non-aging strengthened aluminum alloy integral wall plate based on an autoclave. First, the aluminum alloy slab is fixed on a forming mold, vacuum-sealed and placed in an autoclave; then the hot-pressed The temperature in the tank is raised to the complete annealing temperature of the aluminum alloy, and the pressure in the tank is increased to the pressure required for the component to be molded, so that the material at the large curvature part reaches the yield limit and undergoes plastic deformation; then, the temperature and pressure are appropriately reduced to keep the component in the mold state and creep occurs; finally, the pressure and temperature in the autoclave are removed, and the required component shape is obtained after the slab rebounds. The method of the invention releases a large amount of internal stress through local plastic deformation and creep, reduces the residual stress of the formed workpiece, and can eliminate the problem of uneven performance caused by the difference in local internal stress of the workpiece; not only reduces the production cycle, but also significantly The final springback is reduced, and the tooling is simple, and only one set of die is needed to realize it, which greatly saves the cost of the mold.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal material processing engineering, and relates to a one-time forming method of an aluminum alloy integral wall plate, which is suitable for manufacturing non-aging strengthened aluminum alloy wall plate members with large curvature shapes or complex variable curvature shapes. Background technique [0002] Compared with the traditional aluminum alloy panel assembled by riveting, gluing or spot welding with skin and longitudinal and transverse reinforcement parts, the overall panel has the advantages of reasonable material distribution, light weight, high structural efficiency, smooth surface, aerodynamic shape and Good sealing performance and other advantages. However, the actual integral wall panels, such as wing panels, aircraft door panels, container panels, etc., often have complex variable curvature surfaces or local large curvature shapes, which makes the overall panel manufacturing p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/021B21D26/027C21D9/48
Inventor 邓运来张劲雷郴祁周泽鹏胡珊珊王洋郭晓斌郭奕文
Owner CENT SOUTH UNIV
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