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Method for preparing periodic aluminum alloy lattice structure by utilizing 3D printing

A lattice structure, 3D printing technology, applied in the field of 3D printing, can solve the problems of low mechanical properties and non-dense metal matrix structure, so as to reduce costs, reduce trial and error costs, and shorten the design cycle.

Inactive Publication Date: 2019-07-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3D printing technology can produce metal parts with special shapes and large thickness changes. However, because 3D printing technology is formed by melting and condensing metal powder layer by layer, the matrix structure of metal parts is not dense and the mechanical properties are not high. Subsequent heat treatment is required to adjust the matrix structure. , improve mechanical properties

Method used

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  • Method for preparing periodic aluminum alloy lattice structure by utilizing 3D printing
  • Method for preparing periodic aluminum alloy lattice structure by utilizing 3D printing
  • Method for preparing periodic aluminum alloy lattice structure by utilizing 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (1) Select the square lattice structure as the basic unit body, adjust the outline size and distribution, etc., and obtain periodic large square lattice bodies through periodic arrangement, and use 3D software to realize the drawing of the model;

[0070] (2) Purchase aluminum-magnesium alloy powder that conforms to SLM forming, with a particle size distribution of 25-53 μm and good fluidity. Dry it in a vacuum heating furnace before use to prepare for the experiment;

[0071] (3) Use the simulation software to simulate the 3D printing process, in order to avoid errors in the printing process, so as to preliminarily determine the more appropriate printing parameters and powder setting;

[0072] (4) Use 3D printing software to pre-print the designed model, set the model placement position, processing allowance, material parameters, and set printing parameters based on the simulation results, slice processing, etc.;

[0073] (5) Firstly clean the printing room, then compl...

Embodiment 2

[0079] (1) Select the circular lattice structure as the basic unit body, adjust the outline size and distribution, etc., and obtain a periodic large square lattice body through periodic arrangement, and use 3D software to realize the drawing of the model;

[0080] (2) Purchase aluminum-magnesium alloy powder that conforms to SLM forming, with a particle size distribution of 25-53 μm and good fluidity. Dry it in a vacuum heating furnace before use to prepare for the experiment;

[0081] (3) By simulating the 3D printing process, in order to avoid errors in the printing process, preliminarily determine the more appropriate printing parameters and powder setting;

[0082] (4) Use 3D printing software to pre-print the designed model, set the model placement position, processing allowance, material parameters, and set printing parameters based on the simulation results, slice processing, etc.;

[0083] (5) First clean the printing room, and then complete the powder spreading and su...

Embodiment 3

[0088] (1) Select the rhombus lattice structure as the basic unit body, adjust the outline size and distribution, etc., and obtain a periodic large square lattice body through periodic arrangement, and use 3D software to realize the drawing of the model;

[0089] (2) Purchase aluminum-magnesium alloy powder that conforms to SLM forming, with a particle size distribution of 25-53 μm and good fluidity. Dry it in a vacuum heating furnace before use to prepare for the experiment;

[0090] (3) Use the simulation software to simulate the 3D printing process, in order to avoid errors in the printing process, so as to preliminarily determine the more appropriate printing parameters and powder setting;

[0091] (4) Use 3D printing software to pre-print the designed model, set the model placement position, processing allowance, material parameters, and set printing parameters based on the simulation results, slice processing, etc.;

[0092] (5) Firstly clean the printing room, then comp...

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PUM

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Abstract

The invention relates to a method for preparing a periodic aluminum alloy lattice structure by utilizing 3D printing. According to the method, a periodic aluminum alloy structure is composed of a plurality of basic units with different hollowed-out shapes, and a lightweight structure which has a high-strength relative density ratio and is obtained through 3D printing by utilizing modeling softwarefor parametric array modeling serves as the periodic aluminum alloy lattice structure. The method provided by the invention has the beneficial effects that 3D software is utilized for modeling and design; a laser selective melting technology is adopted for 3D printing; the simulation of the powder spreading process during the workpiece printing operation of a 3D printer as well as the abrasion process of a powder spreading device and a deformed workpiece by utilizing finite element software is focused on; the process is optimized by selecting a scraper with an appropriate shape and corresponding powder spreading parameters; based on the optimized process, printing process parameters which conform to the optimum workpiece forming characteristics are acquired through experimental verification; and finally, the uniform formed periodic lattice structure is obtained.

Description

technical field [0001] The invention relates to the technical field of 3D printing, and mainly relates to a method for preparing a periodic aluminum alloy lattice structure by using 3D printing. Background technique [0002] Improving the load-bearing efficiency of structures is to increase the specific stiffness and specific strength of structural materials, and at the same time make the materials meet the specific mechanical requirements of structural design. Improving the functional efficiency of the structure means increasing the functional density of the structure and achieving more functions with less mass. [0003] Periodic lattice material is an ordered ultra-light porous material manufactured by simulating molecular lattice configuration. Periodic lattice material is a periodic structural material composed of nodes and connecting rod elements between nodes. Its characteristic is that its mesoscopic configuration is a two-dimensional or three-dimensional grid syste...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/24C22C1/04C22F1/047B33Y10/00B33Y50/02
CPCB22F3/24C22C1/0416C22F1/047B33Y10/00B33Y50/02B22F2003/248B22F10/00B22F10/64B22F10/28B22F10/36B22F10/80Y02P10/25
Inventor 马聪严鹏飞严彪
Owner TONGJI UNIV
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