Method for preparing foam metal thin-walled composite pipe with controllable filling density gradient

A metal foam and filling density technology, which is applied in the field of material forming, can solve the problems of complex metal foam material preparation principles, difficult actual preparation, and difficulty in obtaining products with stable performance, so as to improve design flexibility, controllable density gradient, and deformation The effect of pattern stabilization

Active Publication Date: 2020-06-26
北京锦灏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with single uniform density materials, the preparation principle of metal foam materials with variable density is

Method used

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  • Method for preparing foam metal thin-walled composite pipe with controllable filling density gradient
  • Method for preparing foam metal thin-walled composite pipe with controllable filling density gradient
  • Method for preparing foam metal thin-walled composite pipe with controllable filling density gradient

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Taking the preparation of a composite circular tube filled with five-layer cell density gradient controllable metal foam as an example, and using Figure 4 The gradient variation form 17 of filled metal foam in which the density of the middle holes gradually decreases along the axial direction is the design goal. The relative densities of the five layers of metal foam from high to low are designed to be 0.24, 0.2, 0.16, 0.12 and 0.08 in turn, and each layer of foam metal cylinder occupies The same 7070cm 3 volume.

[0045] The preparation process of the present embodiment is as follows:

[0046] The first step, gradient form selection:

[0047] According to the target requirements, from Figure 4 Among the three kinds of filled metal foam thin-walled pipes given with gradient variation of hole density, the gradient form 17 in which the relative density of foam metal gradually increases or decreases from one end to the other end is selected as the target gradient form...

Embodiment 2

[0063] Take the preparation of a composite rectangular tube filled with five-layer cell density gradient metal foam as an example, such as Figure 4 As shown, the density gradient change of the filled metal foam is designed to be high relative density along the middle and low relative density at both ends, and the relative density from the middle to the two ends is designed to be 0.3, 0.22 and 0.14 in turn, and each layer of foam metal cuboid occupies 1500cm 3 volume of.

[0064] The preparation process of the present embodiment is as follows:

[0065] first step,

[0066] Gradient form selection:

[0067] According to the target requirements, from Figure 4 In the given three kinds of hole density gradient filled metal foam thin-walled pipe fittings, the gradient form 18 in which the relative density of the foam metal intermediate layer is the highest and the relative density gradually decreases to both ends is selected as the target gradient form of this example.

[0068...

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Abstract

The invention relates to the technical filed of material forming, in particular to a method for preparing a foam metal thin-walled composite pipe with a controllable filling density gradient. According to actual requirements, by controlling a pore density gradient change mode and a pore density difference range of foam metals with different specifications, a foam metal with density flexibly changing and stable and controllable can be obtained, then through a proper connection mode, the multi-specification foam metal thin-walled composite pipe with controllable filling density gradient changescan be prepared, thus the application scope of the thin-walled pipe is enlarged, and a greater design space is provided for automotive design engineers.

Description

technical field [0001] The invention relates to the technical field of material forming, in particular to a method for preparing a thin-walled metal foamed composite pipe with a controllable filling density gradient, in particular to a porous metal thin-walled composite pipe with a stable pore structure and a controllable density gradient. Preparation. Background technique [0002] Solid metal foam with high strength and low specific gravity, combining high compressive strength with good energy absorption properties. Metal foam has many excellent properties, and in the automotive industry, consumers and car manufacturers particularly value its impact energy absorption properties. With the further development of society and industry, in recent years, it has been found that the metal foam structure with density gradient changes has better energy absorption characteristics than the single density metal foam material, and the deformation mode is more stable. Compared with a si...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F5/12B22F7/04
CPCB22F3/1109B22F3/1125B22F5/106B22F7/006
Inventor 吴健
Owner 北京锦灏科技有限公司
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