One-step shaping method for non-aging reinforced aluminum alloy whole wallboard 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: 2014-12-10
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

Method used

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  • One-step shaping method for non-aging reinforced aluminum alloy whole wallboard based on autoclave
  • One-step shaping method for non-aging reinforced aluminum alloy whole wallboard based on autoclave
  • One-step shaping method for non-aging reinforced aluminum alloy whole wallboard based on autoclave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 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.

[0025] 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

[0027] 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.

[0028] 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

[0030]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.

[0031] First place the slab on the forming mold and fix it, then stick 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-step shaping method for a non-aging reinforced aluminum alloy whole wallboard based on an autoclave. Firstly, an aluminum alloy plate blank is fixed onto a shaping die, is sealed in a vacuum state, and is placed into the autoclave; the temperature inside the autoclave is then raised to the full annealing temperature of the aluminum alloy, the pressure inside the autoclave is increased to the pressure required by contact molding of a component, and plastic deformation of a large-curvature area material occurs when the yield limit is reached; the temperature and the pressure are lowered slightly, so that the component is kept at the contact molding state and creep deformation occurs; finally, pressure and temperature in the autoclave is released, the required component shape and surface are obtained after the plate blank rebounds. The method adopts local plastic deformation and creep deformation to release a great amount of internal stress, so that residual stress of the formed workpiece is reduced, and uneven performance caused by difference of local internal stress of the workpiece is eliminated; the production period is shortened, the final rebound amount is obviously reduced, the tooling is simple, only one set of lower die is required for realization, and die cost is greatly saved.

Description

[0001] technical field [0002] 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 [0003] 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 manufa...

Claims

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Application Information

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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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