Flexible wing structure based on shape memory alloy and manufacturing method thereof

A technology of memory alloy and memory alloy wire, which is applied in the field of aircraft parts, can solve the problems of low fatigue life of wing part structure, difficult control of wing structure, control structure defects, etc., and achieve light weight, low cost and light weight Effect

Pending Publication Date: 2020-09-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned problems, and the present invention is designed to solve the difficult problems of the existing wing structure, low fatigue life and low efficiency of the wing part structure due to defects in the control structure.

Method used

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  • Flexible wing structure based on shape memory alloy and manufacturing method thereof
  • Flexible wing structure based on shape memory alloy and manufacturing method thereof
  • Flexible wing structure based on shape memory alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] As shown in the accompanying drawings, a flexible wing structure based on a shape memory alloy of the present invention includes a shaping frame 1 and several independent bending mechanisms 2; the entire flexible wing structure is comb-shaped, the shaping frame 1 is U-shaped, and the bending mechanism 2 Comb-shaped evenly distributed on the U-shaped inner side of the shaping frame 1.

[0038] The bending mechanisms 2 are arranged side by side along the wing arm direction, and one side of each bending mechanism 2 is fixedly connected with the shaping frame 1 respectively.

[0039] The bending mechanism 2 includes components such as a memory alloy piece 4, a flexible hinge 7, an elastic skin 6, a swing tail 8, and 2-5 rigid connectors 3, and the rigid connectors 3 on the left and right are triangular; The rigid connector 3 in the middle is quadrangular; the tapered corners of each rigid connector 3 are the connecting parts; the edge of the leftmost rigid connector 3 is fi...

Embodiment 2

[0043] On the basis of the structure of Example 1, the memory alloy piece 4 is a memory alloy spring

[0044] The manufacture method of this memory alloy spring comprises the steps:

[0045] S1: Pre-treatment: select NiTi wire with a diameter of 0.7mm (Af=70°C) as the base material, wind it on a stud with a diameter of 8mm, and fix both ends with iron wires whose melting point is higher than the heat treatment temperature of NiTi wire;

[0046] S2: Heat treatment process: Put the fixed studs and NiTi wire into the crucible, then put them into the heat treatment furnace together and lock the furnace door, and cool with the furnace after heat treatment.

[0047] NiTi wire is a solid alloy wire with a mass fraction of Ni of 55.72%. In the heat treatment process, the heat treatment temperature in the heat treatment furnace is 500°C for 1 hour.

Embodiment 3

[0049] On the basis of the structure of Example 1, the memory alloy part 4 is a shape memory alloy wire with multiple shape memory effects. Laser treatment, the difference of laser treatment is embodied in laser treatment power, laser wavelength, laser frequency, time, etc., so that it has different shape memory effects at different treatment points; the shape memory alloy wire with multiple shape memory effects is A structure that is laser processed and has the property of undergoing electrical deformability, an example of a spot laser processing method is the following steps:

[0050] S1: Choose a NiTi alloy wire with a shape memory function of 2mm in diameter, wash it with acetone, alcohol and deionized water in sequence, and then dry it for later use; fix the NiTi alloy wire, and pass inert protective gas at the part to be treated by laser; The inert protective gas generally adopts argon;

[0051] S2: Before the laser treatment, the shielding gas is passed for 30s, and th...

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Abstract

The invention relates to a flexible wing structure based on shape memory alloy and a manufacturing method of the flexible wing structure, which belong to the field of aircraft parts. The flexible wingstructure comprises a shaping frame and a plurality of independent bending mechanisms, and the bending mechanisms are parallel in the wing arm direction and are fixedly connected with the shaping frame; each bending mechanism comprises a memory alloy piece, a flexible hinge, an elastic skin, a swing tail and a plurality of rigid connecting pieces connected with one another; the swinging tail is connected with the shaping frame through a rigid connecting piece; each rigid connecting piece is provided with a conical connecting part; the conical tip end of each connecting part is connected withthe adjacent rigid connecting piece through a flexible hinge; the upper side and the lower side of each flexible hinge are each provided with a memory alloy piece; each memory alloy piece is connectedwith the adjacent rigid connecting piece; and each memory alloy piece can control the bending mechanism to swing up and down when powered on or powered off. The problems that an existing wing structure is not easy to control, fatigue life of a wing part structure is short due to control structure defects, and efficiency is low are solved.

Description

technical field [0001] The invention relates to a flexible wing structure based on a shape memory alloy and a manufacturing method thereof, belonging to the field of aircraft parts. Background technique [0002] The moving surface of the wing changes the area of ​​the aircraft wing by changing the shape of the wing surface. The traditional wing trailing edge uses methods such as slide rails and screws. The traditional wing structure will not only produce structural gaps on the wing, but also Affects the aerodynamic shape of the wing and reduces the fatigue life of the structure around the gap. [0003] NiTi shape memory alloy, as a widely used smart material, has gradually entered different fields with its shape memory effect and superelastic properties and has been well applied. The atomic percentage of NiTi shape memory alloy NiTi is about 1:1 , which has a shape memory effect, the shape memory alloy first transforms from the twin martensite phase to the non-twin martensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C3/44B64C3/54B64F5/10C21D9/02C21D1/74C21D1/09B33Y80/00
CPCB64C3/44B64C3/54B64F5/10C21D9/02C21D1/74C21D1/09B33Y80/00
Inventor 曾志杜旭荧彭倍颜硕柯文超
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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