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A temperature-controlled self-deformation device based on 4D printing and its preparation method

A technology of self-deformation and high-temperature deformation, which is applied in the direction of improving process efficiency, additive processing, and improving energy efficiency. It can solve problems such as limited phase transition temperature range, and achieve the effect of alleviating interface bonding and stress mutation

Active Publication Date: 2021-08-31
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phase transition temperature range of NiTi binary alloy is limited. In the prior art, the 4D printing technology based on NiTi alloy is often only by changing the process parameters to realize the manufacture of functionally graded NiTi materials, which has little influence on the phase transition temperature.

Method used

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  • A temperature-controlled self-deformation device based on 4D printing and its preparation method
  • A temperature-controlled self-deformation device based on 4D printing and its preparation method
  • A temperature-controlled self-deformation device based on 4D printing and its preparation method

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preparation example Construction

[0039] Specifically, as Figure 8 As shown, a method for preparing a temperature-controlled self-deformable device based on 4D printing of the present invention may include the following steps:

[0040] The first step is to use 3D modeling software to establish a 3D model of the self-deformable device, and divide the 3D model into regions according to the preset deformation process and functions. Generally, the part where the shape changes in the low temperature state is set as the low temperature deformation zone, the part that starts to deform at the low temperature and ends in the high temperature state is set as the transition zone, and the part that does not change at the low temperature but only changes at the high temperature state It is set as a high-temperature deformation zone (low temperature and high temperature in the present invention are relative concepts). However, in the present invention, it is not limited to the division of the above-mentioned three regions...

Embodiment 1

[0047] This embodiment 1 comprises the following steps:

[0048] 1) Use computer software to draw such as Figure 4 The hexagonal 3D model is shown, and the 3D model is divided into three regions according to the preset deformation process and function. Figure 4 Among them, 1 is the low-temperature deformation zone, 2 is the transition zone, and 3 is the high-temperature deformation zone. Export the STL file format and slice the model.

[0049] 2) Import the model into the processing system, and select the printing method as strip partition plus interlayer rotation, wherein the partition width is 4mm, and the interlayer rotation angle is 67°. Input selected process parameters in different areas, and finally generate processing paths and files.

[0050] 3) Put the screened and dried powder into the printing equipment, vacuumize the forming chamber, inject high-purity argon gas, and preheat the nickel-titanium substrate.

[0051] 4) In the forming process, partition manufac...

Embodiment 2

[0055] This embodiment 2 comprises the following steps:

[0056] 1) Use computer software to draw such as Figure 4 The hexagonal 3D model is shown, and the 3D model is divided into three regions according to the preset deformation process and function. Figure 4 Among them, 1 is the low-temperature deformation zone, 2 is the transition zone, and 3 is the high-temperature deformation zone. Export the STL file format and slice the model.

[0057] 2) Import the model into the processing system, and select the printing method as strip partition plus interlayer rotation, wherein the partition width is 4mm, and the interlayer rotation angle is 67°. Input selected process parameters in different areas, and finally generate processing paths and files.

[0058] 3) Put the screened and dried powder into the printing equipment, vacuumize the forming chamber, inject high-purity argon gas, and preheat the nickel-titanium substrate.

[0059] 4) In the forming process, partition manufac...

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Abstract

The invention belongs to the field of 4D printing additive manufacturing, and discloses a temperature-controlled self-deformation device based on 4D printing and a preparation method thereof, wherein the preparation method includes the following steps: S1: Establish a three-dimensional model of the self-deformation device, and the divided areas include at least Low-temperature deformation zone, transition zone and high-temperature deformation zone; S2: Set the laser printing parameters of the three areas, and use nickel-titanium-based memory alloy powder to form these three areas by laser selective melting technology to obtain intelligent deformation parts; among them, The nickel-titanium-based memory alloy powder used in the transition zone and the high-temperature deformation zone is nickel-titanium-zirconium ternary alloy powder. S3: Fold the intelligent deformable part to obtain a temperature-controlled self-deformation device. The present invention introduces Zr into the nickel-titanium alloy as the third component. Compared with the prior art, which can only realize the manufacture of functionally graded NiTi materials by changing the process parameters, the present invention can flexibly control the self-deformation of the NiTi base according to the requirements. The excitation temperature point of the device.

Description

technical field [0001] The invention belongs to the field of 4D printing additive manufacturing, and more specifically relates to a temperature-controlled self-deformation device based on 4D printing and a preparation method thereof. Background technique [0002] During the design and use of self-deformable devices, different parts have different deformation and performance requirements. The more functions and deformation steps of the device, the more excitation points are required and the more complex the structure is. At present, self-deformable devices mainly use traditional methods such as casting and sputtering to manufacture "smart materials", and realize deformation through the characteristics of the stimulus response of the smart material itself. The components manufactured in this way often have a single structure, mainly in the form of films, wires, strips or blocks. If complex deformation is involved, sensors are often needed to sense environmental changes, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F3/24C22C19/03B33Y10/00B33Y30/00
CPCB22F3/003B22F3/24B22F2003/247B33Y10/00B33Y30/00C22C19/03Y02P10/25
Inventor 刘洁张媛玲宋波禹林闫春泽史玉升
Owner HUAZHONG UNIV OF SCI & TECH