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Scraping, vibrating and soldering method for preparing foamed aluminum sandwich structure

A technology of sandwich structure and brazing method, which is applied in the direction of manufacturing tools, welding equipment, metal processing equipment, etc., can solve the problems of hindering the spread and wetting of solder, difficulty in removing oxide film, and inability of solder to spread, etc., to achieve improved The effect of comprehensive mechanical properties, improving strength and reducing microcracks

Inactive Publication Date: 2009-09-16
HARBIN INST OF TECH
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Problems solved by technology

However, the oxide film on the surface of the aluminum material is dense and has a high melting point, which is difficult to remove, which seriously hinders the spreading and wetting of the solder on the base metal, and the special porous structure on the surface of the foamed aluminum makes the removal of the oxide film more difficult, so The solder does not spread as smoothly as on the aluminum sheet, which is also a problem in the brazing process of aluminum foam

Method used

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  • Scraping, vibrating and soldering method for preparing foamed aluminum sandwich structure
  • Scraping, vibrating and soldering method for preparing foamed aluminum sandwich structure
  • Scraping, vibrating and soldering method for preparing foamed aluminum sandwich structure

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Embodiment 1

[0017] Embodiment 1, combining figure 1 , the present invention prepares a kind of scraping vibration brazing method of aluminum foam sandwich structure, concrete steps are as follows:

[0018] Step 1: Ultrasonic cleaning and drying the aluminum foam plate with a thickness of 20mm and a porosity of 80% and an aluminum plate with a thickness of 2mm, respectively heating the foamed aluminum plate and the aluminum plate with a propane flame to make the temperature reach 390°C, and evenly spread the solder Coated on both sides of aluminum foam and one side of two aluminum plates;

[0019] Step 2: Continue to heat, keep the aluminum foam board and the aluminum board warm, and use a wire brush (or steel wire) to scrape the side of the workpiece with the brazing filler metal, so that the brazing filler metal gradually melts into the foam aluminum and the surfaces of the two aluminum boards to form a layer Solder adsorption layer;

[0020] Step 3: Clean up the excess solder on both ...

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Abstract

The invention aims to provide a scraping, vibrating and soldering method for preparing a foamed aluminum sandwich structure, which adopts a wire brush to scrape so that oxide films on the surfaces of aluminum plates and a foamed aluminum plate are broken, pure aluminum surfaces are exposed, and a brazing material can be fully fused into aluminum and can be fully contacted and reacted with an aluminum parent metal to form a good reaction binding layer. The invention achieves the aims as follows: the scraping, vibrating and soldering method for preparing the foamed aluminum sandwich structure comprises the following four steps: cleaning, drying and heating the foamed aluminum plate and two aluminum plates; scraping the brazing material coating surfaces of the aluminum plates by adopting the wire brush; removing the redundant brazing material floating on two surfaces of the aluminum plates and the foamed aluminum plate; and compounding two brazing material coating surfaces of the aluminum plates and the brazing material coating surface of the foamed aluminum plate. The method gives full play to the advantage of foamed aluminum with lightweight, and has special significance in the aerospace field and the like sensitive to weight.

Description

(1) Technical field [0001] The invention relates to welding technology, in particular to a scraping vibration brazing method for preparing a foamed aluminum sandwich structure. (2) Background technology [0002] Aluminum foam is a new type of porous material with numerous bubbles distributed in the metal aluminum matrix. It has the characteristics of a continuous metal phase and a dispersed air phase, and is a new type of material with a variety of excellent properties. The pore size of the bubbles in foamed aluminum is relatively large, and it has a high porosity (40% to 90%), so that its density is only 0.1 to 0.4 times that of metal aluminum. The bending ratio stiffness of aluminum foam can reach 1.5 times that of steel, the damping performance can reach 5-10 times that of metal aluminum, and it has a high energy absorption rate, making its shock absorption performance very outstanding. In addition, aluminum foam also has good acoustic performance, excellent electromagn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/06B23K1/20B23K103/10
Inventor 吕世雄冯吉才黄永宪周荣林李海超曲杰
Owner HARBIN INST OF TECH
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