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Semi-curing forming process for thermosetting fiber metal laminate

A technology of fiber metal laminates, forming process, applied in the direction of lamination, lamination device, anodizing, etc.

Inactive Publication Date: 2020-12-18
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of forming multi-curvature complex parts of thermosetting fiber metal laminates, the purpose of the present invention is to provide a kind of aluminum alloy that can be completed on a set of forming equipment without changing the existing equipment and reducing the forming and preparation processes. Forming process of thermosetting fiber metal laminate

Method used

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  • Semi-curing forming process for thermosetting fiber metal laminate
  • Semi-curing forming process for thermosetting fiber metal laminate

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Embodiment 1

[0026] A kind of semi-solidified fiber metal laminate forming process of the present invention, the steps are:

[0027] 1) Pretreatment of sheet metal: including surface decontamination and chemical oxidation. ① Degrease the metal surface with acetone; ② Alkaline wash with 60° sodium hydroxide and sodium carbonate aqueous solution; ③ Rinse with tap water; ④ Deoxidize with nitric acid; ⑤ Rinse with tap water; ⑥ Phosphoric acid anodization;

[0028] 2) The aluminum alloy plate after phosphoric acid anodization can be laminated with glass fiber prepreg. Layers should be laid at the angle of laying. Care should be taken to prevent the generation of air bubbles during the laying process. Use rollers or heavy objects to compact the laminates and discharge the air bubbles between layers.

[0029] 3) To seal around the sheet, use a plastic film with low strength. The purpose is to prevent the hydraulic oil from entering the fiber layer to contaminate the sheet and affect the performa...

Embodiment 2

[0034] A kind of semi-solidified fiber metal laminate forming process provided by the invention comprises the following steps carried out in order:

[0035] 1) Pretreatment of aluminum alloy 2024-T3 sheet: including surface decontamination and chemical oxidation. ① Degrease the surface of the aluminum alloy plate with acetone; ② Alkaline wash with 60° sodium hydroxide and sodium carbonate aqueous solution; ③ Rinse with tap water; ④ Deoxidize with nitric acid; ⑤ Rinse with tap water; ⑥ Phosphoric acid anodization; .

[0036] 2) The aluminum alloy plate after phosphoric acid anodization treatment can be laminated with glass fiber prepreg. First, a layer of J133 adhesive is applied on the aluminum alloy surface, and then the glass fiber prepreg is cut and dried. , Lay the layers according to the specified angle of laying. Care should be taken to prevent the generation of air bubbles during the laying of the layers. Use rollers or heavy objects to compact the laminates so that th...

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Abstract

The invention discloses a semi-curing forming process for a thermosetting fiber metal laminate. The semi-curing forming process comprises the following steps: pretreating a metal plate; coating a layer of adhesive on the surface of the metal plate, and laying a cut glass fiber prepreg on the surface of the metal plate; sealing the periphery of the laid fiber metal plate; placing the fiber metal plate on a lower die of a hydraulic forming machine and positioning descending the upper die, closing the dies and forming; putting a formed part into a vacuum bag, vacuumizing, heating to a curing temperature, and keeping the temperature and the pressure for 3 hours; furnace cooling. The thermosetting fiber metal laminate is formed before being cured, and adverse factors such as large deformation and difficult forming after curing are solved to a certain extent by utilizing a certain flowing property between the resin and the metal plate. And meanwhile, liquid filling forming is adopted, so that the plate is stressed in the thickness direction and bears the three-way compressive stress state, the forming performance of the fiber laminate is improved, and forming of multi-curvature complex-shaped parts is achieved.

Description

technical field [0001] The application relates to the technical field of sheet material forming, especially the technical field of fiber metal laminate forming technology. Background technique [0002] With the continuous emergence of high-tech technologies in the fields of aerospace and automobiles and more complex working environments, the requirements for the performance, material properties and appearance of structural parts are getting higher and higher, including structural lightweight, high-quality and overall requirements, etc. Therefore, fiber metal laminates with excellent comprehensive properties have been developed, but because of the complex structural characteristics of fiber metal laminates, there are many difficulties in forming, especially for the forming of small-sized multi-curvature parts. [0003] For the forming of thermosetting fiber metal laminates, because the ultimate tensile strain of the cured fibers is very small, which greatly limits the deform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/10B32B37/00B32B37/12B32B38/00B32B38/16C25D11/08
CPCB32B37/003B32B37/10B32B37/1284B32B38/00B32B38/0036B32B38/162B32B2038/0052B32B2038/0076B32B2311/24B32B2315/08C25D11/08
Inventor 曾一畔陈林黎明董锦亮门向南邓涛李晓军成靖
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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