Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof

A 3D printing and lattice-based technology, which is applied in the manufacture of tools, casting molding equipment, metal processing equipment, etc., can solve the problems of residual oxidation inclusions and gaps in the matrix, and the decline in mechanical properties

Inactive Publication Date: 2015-11-11
INST OF SOLID PHYSICS ACAD SINICA
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  • Abstract
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  • Application Information

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Problems solved by technology

However, for light metals such as Al and Mg whose matrix materials are easily oxidized, direct 3D printing is likely to caus

Method used

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  • Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof
  • Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof
  • Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof

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Embodiment Construction

[0035] Aluminum-based lattice material based on 3D printing technology: substrate: L3 industrial pure aluminum; unit cell: pyramid type; rod diameter: 1.7mm; rod length: 6mm; rod / projection surface angle: 45°; rod cross-sectional shape: round ; Unit cell number: 4 layers; Unit cell number per layer: 60.

[0036] The preparation method is as follows:

[0037] (1)Using CATIA software to design unit cell structure, including pyramid configuration, rod element diameter, length, rod / projection surface angle, rod cross-sectional shape, number of unit cells per layer and number of lattice layers, etc., and then obtained by mirroring The corresponding topology.

[0038] (2) Using polypropylene (PP) plastic powder as raw material, the dot matrix model is printed by laser selective melting method.

[0039] (3) The gypsum powder and auxiliary materials are added with water to prepare a slurry with appropriate viscosity, which is poured into a polypropylene lattice model. After drying at 50°C f...

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Abstract

The invention discloses an aluminum-based dot matrix material based on 3D printing technology. In the dot matrix material, industrial pure aluminum or any aluminum alloy is employed as a base body. Unit cell configuration and a periodic structure thereof are modeled and designed with CATIA software and the model is produced from high-molecular materials through the 3D printing technology. An investment casting shell mould is prepared from soluble gypsum and the aluminum-based dot matrix material is prepared through an air-pressure seepage process. The aluminum-based dot matrix material can be in a pyramid type, a Kagome type and a grating type in the unit cell configuration. The invention also provides a sandwiched plate composite structure composed of the dot matrix material and a compact surface plate. The diameter of a unit cell bar is 0.5-5.0 mm, the length of the unit cell bar is 0.5-15.0 mm, and an included angle between the unit cell bar and a protective surface is 30-70 degrees. The compact surface plate is made from industrial pure aluminum, aluminum alloy, iron alloy or high-molecular materials. The dot matrix material with the industrial pure aluminum as the base body can reach higher than 5 MPa/g*cm<-3> in specific compressive strength.

Description

Technical field [0001] The invention relates to a design and preparation method of an aluminum-based lattice material based on 3D printing technology. Through computer design, a certain unit cell configuration and topological structure are obtained, and then a polymer lattice model is prepared using 3D printing technology, and then the gypsum slurry shell and air pressure infiltration method are used to obtain the complete structure of the polymer lattice model. Consistent aluminum-based (pure aluminum or aluminum alloy) lattice material. Background technique [0002] Lattice material is a kind of ordered porous material of space grid composed of nodes and connecting rod units. Compared with traditional metal foam and metal honeycomb materials, the lattice material based on light metal has higher specific strength, specific rigidity and energy absorption per unit mass, especially when the relative density is low, the lattice material has particularly With outstanding quality, e...

Claims

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Application Information

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IPC IPC(8): B22C9/22
Inventor 韩福生黄英杰王新福李振东
Owner INST OF SOLID PHYSICS ACAD SINICA
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