Energy absorber of filling deformed foam aluminium and aluminium alloy

An energy absorber, aluminum alloy technology, applied in the direction of friction shock absorber, can solve the problems of reduced energy absorption effect, personnel injury, low applicability of special-shaped structure, etc., to achieve light weight, high energy absorption rate, good energy absorption effect of ability

Inactive Publication Date: 2007-12-19
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

Due to the needs of civil and high-tech fields such as automobiles, aluminum foam special-shaped parts and sandwich structures are becoming the forefront in the field of metal foam preparation. Among them, it has been reported that closed-cell aluminum foam is used for energy absorption, and the existing aluminum foam materials are in the field. When used as an energy absorber, its energy absorption efficiency is about 60%, and debris will be generated during the energy absorption process, which may damage the packaging, cause personal injury, and also adversely affect the safe operation of the surrounding electronic circuits
At present, the shape of the energy absorber made of integral foamed aluminum material is relatively simple due to the limitation of the preparation process, and the applicability to the special-shaped structure that needs to be protected is not high, and it is often subject to various restrictions, especially for the protection of large-volume parts. Integral foamed aluminum The preparation of alloy materials is very difficult, and the method of splicing will reduce the energy absorption effect; the energy absorber using secondary foamed aluminum alloy special-shaped parts can increase the absorption efficiency by more than 10%, meeting the requirements of various high-tech fields. Energy Absorption Applications

Method used

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  • Energy absorber of filling deformed foam aluminium and aluminium alloy
  • Energy absorber of filling deformed foam aluminium and aluminium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The first step: first, through the secondary foaming method, prepare a foamed aluminum alloy spherical piece with a porosity of 83.8%, an average pore diameter of 1.7mm, and an average diameter of 12mm to obtain a filler;

[0018] The second step: use an aluminum tube with a thickness of 3mm and a diameter of 10mm as the shell, and complete the accumulation of the secondary foamed aluminum alloy filling parts in the shell, and the stacking density is 73.5%;

[0019] Step 3: Seal the foam filler in the aluminum tube by welding to make a special-shaped energy absorber.

[0020] Step 4: Carry out anti-corrosion treatment on the special-shaped energy absorber.

Embodiment 2

[0022] The first step: firstly, through the secondary foaming method, a foamed aluminum alloy spherical piece with a porosity of 75.8%, an average pore diameter of 1.7mm, and an average diameter of 23mm is prepared to obtain a filler;

[0023] The second step: use a stainless steel right-angle elbow with a thickness of 2mm and a diameter of 90mm as the shell, and complete the accumulation of the secondary foamed aluminum alloy filling parts in the shell, and the stacking density is 65.3%;

[0024] Step 3: Seal the foam filler in the stainless steel right-angle elbow by welding to make a special-shaped energy absorber.

[0025] Step 4: Carry out anti-corrosion treatment on the special-shaped energy absorber.

Embodiment 3

[0027] The first step: firstly, through the secondary foaming method, a foamed aluminum alloy spherical piece with a porosity of 50.4%, an average pore diameter of 1.0mm, and an average diameter of 23mm is prepared to obtain a filler;

[0028] The second step: use a stainless steel right-angle elbow with a thickness of 2mm and a diameter of 90mm as the shell, and complete the accumulation of the secondary foamed aluminum alloy filling parts in the shell, and the stacking density is 30.0%;

[0029] Step 3: Seal the foam filler in the stainless steel right-angle elbow by welding to make a special-shaped energy absorber.

[0030] Step 4: Carry out anti-corrosion treatment on the special-shaped energy absorber.

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Abstract

The present invention relates to an energy absorber filled with shaped foam aluminium and aluminium alloy. It is characterized by that it is composed of metal external shell, secondary foamed foam and aluminium alloy shaped component. The porosity of the described secondary foamed aluminium and aluminium alloy shaped component is 50.4%-93.8%, and its pore size is 1-5 mm, so that its energy-absorbing efficiency is high.

Description

1. Technical field [0001] The invention belongs to an energy absorber, in particular to a special-shaped energy absorber. 2. Background technology [0002] Existing technology: The ultra-light porous metal focusing on closed-cell foamed aluminum, due to the special pore structure, realizes light weight and multi-functionality of the material, thus becoming a hot spot in aerospace and high technology. Due to the needs of civil and high-tech fields such as automobiles, aluminum foam special-shaped parts and sandwich structures are becoming the forefront in the field of metal foam preparation. Among them, it has been reported that closed-cell aluminum foam is used for energy absorption, and the existing aluminum foam materials are in the field. When used as an energy absorber, its energy absorption efficiency is about 60%, and debris will be generated during the energy absorption process, which may damage the packaging, cause personal injury, and also have an adverse effect on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F7/01C22C1/08
Inventor 何德坪禇旭明何思渊施国栋王权甘望益刘书田
Owner SOUTHEAST UNIV
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