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Two-way deformable shape memory alloy bump and manufacturing method thereof

A technology of memory alloy and memory alloy plate, which is applied in the field of material bending and deformation, can solve the problems of complex driving mechanism, complex processing technology, and low surface accuracy, and achieve simple manufacturing process, high surface accuracy, and good fatigue resistance Effect

Inactive Publication Date: 2017-05-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a two-way deformed shape memory alloy bulge and its manufacturing method, so as to solve the problem of low surface accuracy of the bulge in the prior art, or the bulge is an inclined surface. , complex driving mechanism, large space occupation, complicated processing technology, etc.

Method used

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  • Two-way deformable shape memory alloy bump and manufacturing method thereof
  • Two-way deformable shape memory alloy bump and manufacturing method thereof
  • Two-way deformable shape memory alloy bump and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Use wire cutting to cut the shape memory alloy plate and spring steel plate into the following dimensions: shape memory alloy plate size (length × width × thickness) 76mm × 41mm × 3mm; spring steel plate size (length × width × thickness) 76mm × 41mm × 2mm; The required heating film size (length×width×thickness) is 76mm×41mm×(0.1~0.2)mm; a countersunk screw hole with a diameter of 3mm is made on the shape memory alloy plate;

[0043] Design and manufacture forming molds according to needs, including upper and lower forming molds. Place the shape memory alloy plate between the upper and lower forming molds, and tighten them with bolts and nuts. Place the mold with the shape memory alloy plate in the heating furnace, heat up to 800°C, keep it warm for 1 hour, and close The power supply of the heating furnace is cooled to room temperature with the furnace; the mold is disassembled, the shape memory alloy plate after forming is taken out, and annealed at 450 ℃ for 20 minutes; t...

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Abstract

The invention discloses a two-way deformable shape memory alloy bump and a manufacturing method thereof. The bump consists of a shape memory alloy plate, a spring steel plate, a heating film and screws, and is applicable to adjustment of a flow field of an air intake duct of an engine. The molded surface of the bump is guaranteed by the shape memory alloy plate; the required molded surface is obtained by thermally forming the shape memory alloy plate by using a die; the molded shape memory alloy plate is subjected to cold and hot training, and finally the shape memory alloy plate is pressed to be a flat and straight state and assembled with the heating film and the spring steel plate, so that manufacturing of the shape memory alloy bump is completed. The bump disclosed by the invention has the advantages of high molded surface precision, quick response, high fatigue strength, simple structure, small occupied space and the like.

Description

Technical field [0001] The invention belongs to the technical field of material bending deformation, and specifically refers to a two-way deformed shape memory alloy that can be used for adjusting the flow field of an aircraft engine air inlet and a manufacturing method thereof. Background technique [0002] High-speed aircraft require breakthrough development in the propulsion system. A fixed geometry intake port is currently the most direct and effective design solution for the engine intake port. The performance is optimal at the design point, and the performance deviates from the design point. The variable-geometry intake port changes its shape to provide a stable flow field for the engine whose flight conditions change greatly, to ensure the normal operation of the combustion chamber, improve the engine performance and adaptability, and achieve the goal of the engine's multi-task function. At present, developed countries in the world have conducted a lot of research in this ...

Claims

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Application Information

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IPC IPC(8): C22F1/00
CPCC22F1/00
Inventor 李杰锋沈星杨忠清
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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