A kind of preparation method of filling density gradient controllable foam metal thin-walled composite pipe

A metal foam and filling density technology, which is applied in the field of material forming, can solve the problems of complicated metal foam material preparation principles, difficulty in obtaining products with stable performance, and practical preparation difficulties, so as to achieve stable deformation modes, controllable density gradients, and improved use. performance effect

Active Publication Date: 2021-11-16
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 complicated, and the actual preparation is very difficult, and it is difficult to obtain products with stable performance

Method used

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  • A kind of preparation method of filling density gradient controllable foam metal thin-walled composite pipe
  • A kind of preparation method of filling density gradient controllable foam metal thin-walled composite pipe
  • A kind of preparation method of filling density gradient controllable foam metal thin-walled composite pipe

Examples

Experimental program
Comparison scheme
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 change form of filled metal foam with medium pore density gradually decreasing along the axial direction is the design target. The relative density of the five layers of metal foam from high to low is designed to be 0.24, 0.2, 0.16, 0.12 and 0.08 in sequence, and each layer of metal foam cylinder occupies The same 7070cm 3 volume.

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

[0046] The first step, gradient form selection:

[0047] According to the target needs, from Figure 4 Among the given three ways of pore density gradient change, 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 of this example.

[0048] The second step, mixing:

[0049] according to fig...

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 filled metal foam is designed to be high relative density along the middle and low relative density at both ends, and the relative density is designed to be 0.3, 0.22 and 0.14 in sequence from the middle to both ends, and each layer of metal foam cuboid occupies 1500cm 3 volume of.

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

[0065] first step,

[0066] Gradient form selection:

[0067] According to the target needs, from Figure 4 Among the three kinds of pore density gradient change methods, the gradient form 18 with the highest relative density of the foam metal middle layer and gradually decreasing relative density to both ends is selected as the target gradient form of this example.

[0068] The second step, mixing:

[0069] according to figure 1 According...

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Abstract

The invention relates to the technical field of material forming, in particular to a method for preparing a foamed metal thin-walled composite pipe with a controllable filling density gradient. According to actual needs, by controlling the variation mode of the hole density gradient and the difference range of the hole density of different specifications of the foamed metal, the obtained Metal foam with flexible and stable and controllable density, and then prepare multi-specification metal foam thin-walled composite pipes with controllable filling density gradient through appropriate connection methods, so as to expand the application range of thin-walled pipes and provide automotive design engineers with more Large design space.

Description

technical field [0001] The invention relates to the technical field of material forming, in particular to a method for preparing a metal foam thin-wall composite pipe with a controllable filling density gradient, in particular to a thin-wall metal foam composite pipe filled with a stable pore structure and size 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. In the field of automobile industry, consumers and automobile manufacturers especially value its impact energy absorption performance. With the further development of society and industry, in recent years, it has been found that the metal foam structure with gradient density has better energy absorption characteristics than the single density metal foam material, and the deformation mode is more stable. Compared...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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