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Additive manufacturing method of lightweight rigid-flexible coupled heterostructure

A technology of additive manufacturing and heterogeneous structure, applied in the direction of manufacturing tools, additive manufacturing, additive processing, etc.

Active Publication Date: 2021-09-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional manufacturing of heterogeneous structures mostly adopts the welding method, but there are certain restrictions on the processing size and shape of the heterogeneous structures produced by the welding method.

Method used

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  • Additive manufacturing method of lightweight rigid-flexible coupled heterostructure
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  • Additive manufacturing method of lightweight rigid-flexible coupled heterostructure

Examples

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Effect test

Embodiment 1

[0049] A method for additive manufacturing of a lightweight rigid-flexible coupling heterogeneous structure, comprising the following steps:

[0050] (1) According to the intermiscibility and soft-hard difference characteristics of materials, martensitic steel powder is selected as the raw material of hard material 2 in the structure, and austenitic steel powder is used as the raw material of soft material 3 in the structure, and the martensitic steel is The particle size of the powder and austenitic steel powder is 40-100μm, and the sphericity is good. The powder is dried before additive manufacturing and put into a vacuum drying furnace to increase the fluidity of the powder;

[0051] (2) The substrate 1 is made of martensitic steel plate, and the substrate 1 is processed into a suitable size by using a wire electric discharge machine, and the surface of the substrate 1 is polished with sandpaper, and the substrate 1 is polished with 400 mesh, 800 mesh and 1200 mesh sandpaper...

Embodiment 2

[0058] A method for additive manufacturing of a lightweight rigid-flexible coupling heterogeneous structure, comprising the following steps:

[0059] (1) According to the compatibility of materials and the characteristics of soft and hard differences, ABS thermoplastic wire is selected as the raw material of the hard material 2 in the structure, and TPU thermoplastic wire is used as the raw material of the soft material 3 in the structure. The diameter of the ABS thermoplastic filament and the diameter of the TPU thermoplastic filament should not exceed the allowable size of the throat of the fusion deposition fuse nozzle 7, the diameter of the ABS thermoplastic filament and the TPU thermoplastic filament The diameters of the ABS and TPU thermoplastic wires are 1.75mm respectively. If the diameters of the ABS thermoplastic wire and the TPU thermoplastic wire are too large, the wire cannot be fed, and if it is too small, the gears in the wire feeding device cannot be clamped and...

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Abstract

The invention provides an additive manufacturing method of a lightweight rigid-flexible coupled heterostructure. The method comprises the following steps of (1) selecting a raw material of a soft material and a raw material of a hard material for additive manufacturing according to heterostructure design and intermiscibility and hardness difference characteristics of the materials; (2) selecting a substrate material according to two heterogeneous materials to be subjected to additive manufacturing forming, and then carrying out cutting based on a size, surface polishing and cleaning treatment on a used substrate; (3) manufacturing structural unit bodies of the hard material and the soft material on the substrate in a regional additive manufacturing mode; and (4) integrally taking down the grid-shaped heterostructure which is subjected to additive manufacturing and is provided with structural gaps from the substrate by using linear cutting or machining. The additive manufacturing method is simple in preparation process and low in raw material cost, the prepared heterostructure has the properties of light weight, good toughness, impact resistance and the like, material-structure-property integrated design and manufacturing forming are achieved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a lightweight rigid-flexible coupled heterogeneous structure additive manufacturing method, which belongs to the technical field of heterogeneous structure additive manufacturing. Background technique [0002] In nature, in order to adapt to the environment, organisms have undergone hundreds of millions of years of evolution, and the structures produced can satisfy multiple combined functions at the same time. Human beings have found from natural organisms that most of the biological materials and structures are composed of soft-hard structures, such as shell nacre, fish scales, etc., which present a soft-hard alternating rigid-flexible coupling structure, which makes them lightweight. Excellent properties such as high strength, high toughness, and impact resistance; the soft membrane and hard veins of plant leaves and insect wings also show the characteristics of rigid-flexible coupling, and also have light weight, high streng...

Claims

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Application Information

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IPC IPC(8): B29C64/118B29C64/386B29C64/393B29C64/379B29C64/35B22F10/28B22F10/30B22F10/66B22F10/85B33Y10/00B33Y40/00B33Y40/20B33Y50/00B33Y50/02
CPCB29C64/118B29C64/386B29C64/393B29C64/379B29C64/35B22F10/28B22F10/30B22F10/66B22F10/85B33Y10/00B33Y40/00B33Y40/20B33Y50/00B33Y50/02Y02P10/25
Inventor 张新戈张丹丹王文权杜明张志辉吴大振樊慧璋
Owner JILIN UNIV
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