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CFRP/aluminum alloy composite structure heat-forming and co-curing integrated forming method

A composite structure, aluminum alloy laminate technology, applied in the field of sheet forming, can solve the problems of inability to achieve full solid solution of alloy elements in the aluminum alloy sheet, unable to meet the rapid integrated forming of composite structures, and reducing the utilization rate of hot forming molds, etc. Achieve the effect of reducing material cost, shortening forming cycle and improving utilization rate

Inactive Publication Date: 2020-06-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This method uses alternating current to heat the CFRP / aluminum alloy laminate. The heating temperature and time range cannot achieve sufficient solid solution of the alloy elements in the aluminum alloy sheet, and the aluminum alloy cannot be supersaturated in solid solution during the subsequent aging and quenching process. The strengthening phase in the prepreg precipitates, so that the strengthening effect cannot be achieved. In addition, the higher heating temperature may cause damage or premature curing of the CFRP prepreg under the action of thermal load. The laminate is heated by electric heating. It will bring additional energy consumption; on the other hand, in this method, the stamping forming of the laminate and the aging heat treatment of the aluminum alloy are carried out in two steps, and the aging heat treatment of the laminate in the mold will seriously reduce the utilization rate of the thermoforming mold , unable to meet the needs of rapid integrated forming of composite structures

Method used

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  • CFRP/aluminum alloy composite structure heat-forming and co-curing integrated forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The present embodiment adopts aforementioned method to carry out, and concrete steps are as follows:

[0052] (1) Section A-B is the solid solution stage. Put the aluminum alloy 6069 in a heating furnace and keep it warm for 50 minutes at 520°C to fully dissolve the precipitated phase in the alloy;

[0053] (2) Section B-C is the quenching stage, and the aluminum alloy plate is taken out and quenched in water to obtain a supersaturated solid solution;

[0054] (3) Section C-D is the pretreatment stage. The surface of the aluminum alloy is roughened by surface sandblasting, and the carbon fiber prepreg (CFSJ-1000Z, Shandong Jiangshan Fiber Technology Co., Ltd.) is laid on the rough surface of the aluminum alloy plate , to obtain prepreg / aluminum alloy laminate;

[0055] (4) The D-E section is the first heating stage. Place the prepreg / aluminum alloy laminate on the mold at room temperature, make the lower surface of the aluminum alloy contact the upper surface of the lo...

Embodiment 2

[0064] The present embodiment adopts aforementioned method to carry out, and concrete steps are as follows:

[0065] (1) Section A-B is the solid solution stage. Put the aluminum alloy in a heating furnace and keep it warm for 180 minutes at 450°C to fully dissolve the precipitated phase in the alloy;

[0066] (2) Section B-C is the quenching stage, and the aluminum alloy plate 2024 is taken out and quenched in water to obtain a supersaturated solid solution;

[0067] (3) Section C-D is the pretreatment stage. The surface of the aluminum alloy is roughened by surface sandblasting, and the carbon fiber prepreg (CFSJ-1000Z, Shandong Jiangshan Fiber Technology Co., Ltd.) is laid on the rough surface of the aluminum alloy plate , to obtain prepreg / aluminum alloy laminate;

[0068] (4) The D-E section is the first heating stage. Place the prepreg / aluminum alloy laminate on the mold at room temperature, make the lower surface of the aluminum alloy contact the upper surface of the l...

Embodiment 3

[0077] The present embodiment adopts aforementioned method to carry out, and concrete steps are as follows:

[0078] (1) Section A-B is the solid solution stage. Put the aluminum alloy 7075 in a heating furnace and keep it warm for 30 minutes at 575°C to fully dissolve the precipitated phase in the alloy;

[0079] (2) Section B-C is the quenching stage, and the aluminum alloy plate is taken out and quenched in water to obtain a supersaturated solid solution;

[0080] (3) Section C-D is the pretreatment stage. The surface of the aluminum alloy is roughened by anodic oxidation, and the carbon fiber prepreg (CFSJ-1000Z, Shandong Jiangshan Fiber Technology Co., Ltd.) is laid on the rough surface of the aluminum alloy plate. Obtain prepreg / aluminum alloy laminates;

[0081] (4) The D-E section is the first heating stage. Place the prepreg / aluminum alloy laminate on the mold at room temperature, make the lower surface of the aluminum alloy contact the upper surface of the lower mol...

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Abstract

The invention discloses a CFRP / aluminum alloy composite structure heat-forming and co-curing integrated forming method. The method comprises the following steps that a heat-treatable aluminum alloy plate is placed in a heating furnace for complete solution treatment, the aluminum alloy plate is taken out for water quenching and surface roughening treatment, then prepreg is laid on an aluminum alloy surface for hot-pressing co-curing through stepped heating, and finally the CFRP / aluminum alloy part is placed in the heating furnace for artificial aging. According to the method, CFRP and aluminumalloy integrated forming can be realized, the impact resistance of a composite structure is effectively improved, meanwhile, the material and manufacturing cost is reduced, the forming period is shortened, and the process efficiency is improved.

Description

technical field [0001] The invention relates to a thermoforming and co-curing integrated forming method of a CFRP / aluminum alloy composite structure, which belongs to the technical field of plate forming. Background technique [0002] In recent years, with the continuous increase of automobile production and ownership, energy conservation and environmental protection have become the primary issues facing the global automobile industry, and the emission standards of countries around the world are becoming increasingly stringent. In this context, improving the fuel economy of automobiles and reducing greenhouse gas emissions are of vital importance to the sustainable development of the automobile industry. Lightweight vehicles are one of the most effective measures to reduce energy consumption and emissions. On the premise of ensuring the strength and safety performance of the car, reducing the overall mass of the car as much as possible can not only effectively reduce fuel c...

Claims

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Application Information

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IPC IPC(8): B29C70/68B29C70/78B29B11/00C22F1/04
CPCB29C70/681B29C70/683B29C70/78C22F1/04
Inventor 何霁郭聪李淑慧韩国丰
Owner SHANGHAI JIAO TONG UNIV
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