Ti base shape memory alloy rivet fastening piece and manufacturing method thereof

A memory alloy and manufacturing method technology, applied in rivets and other directions, can solve the problems of difficulty in low temperature machining and deformation of shape memory alloy rivets, achieve excellent performance stability and reliability, solve the difficulty of low temperature machining deformation, and reduce structural weight. Effect

Active Publication Date: 2018-06-12
烟台浩忆生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a Ti-based shape-memory alloy rivet fastener and a manufacturing method thereof, aiming at the characteristics of traditional shape-memory alloy rivet fasteners, as well as the production and pre-deformation process and the cost of the production process.
Through this method, rivet fastener products with excellent performance can be manufactured efficiently and at low cost, which solves the problem of difficult deformation of shape memory alloy rivets at low temperature, and ensures product performance consistency and reliability

Method used

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  • Ti base shape memory alloy rivet fastening piece and manufacturing method thereof
  • Ti base shape memory alloy rivet fastening piece and manufacturing method thereof
  • Ti base shape memory alloy rivet fastening piece and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The composition of Ti-based shape memory alloy rivets is Ti‐(20‐30)Zr.

[0049] Its manufacturing method is as follows:

[0050] 1. Alloy smelting: According to the ratio of alloy composition, select high-purity Ti (purity ≥ 99.99%), high-purity Zr (purity ≥ 99.99%) and other high-purity alloy raw materials with appropriate proportions, and use vacuum non-consumable arc The alloy ingot is obtained by smelting, and the homogenization treatment is carried out by holding the temperature at 1000°C for 14 hours to ensure the uniformity of the alloy composition;

[0051] 2. Alloy forging and drawing: alloy ingots are forged at 920°C to obtain billets of a certain size, and then alloy rods with a diameter of 80mm are obtained through drawing processes;

[0052] 3. Mechanical processing: the Ti-based shape memory alloy rod is produced by more than one mechanical processing forming method such as turning, clamping, milling, planing, and grinding. figure 1 The symmetrical struc...

Embodiment 2

[0057] The composition of Ti-based shape memory alloy rivets is Ti‐35Mo.

[0058] Its manufacturing method is identical with embodiment 1 manufacturing method, and difference is according to image 3 Shown is the manufacture of two or more product structures in series, and the design structure dimensions of each position are the same as those in Example 1 (where n≥2, indicating that the design includes two or more product structures). In order to ensure the uniformity of the pre-deformation treatment before use, the number of symmetrical structures of serial rivets can be designed according to the specific use conditions.

[0059] Same as the manufacturing method of Example 1, the image 3 The structural products are placed in a specific stretching device for uniform deformation, and then symmetrically cut along the middle of each product's protrusion point and the middle of the end to obtain a finished rivet, which can be riveted under specific working conditions, and can be...

Embodiment 3

[0062] The composition of Ti-based shape memory alloy rivets is Ti‐20Zr‐5Nb.

[0063] Its manufacturing method is the same as the preparation method of embodiment 2, according to the design concept of embodiment 2, such as Figure 4 Manufacture two and more as shown image 3 Structural parallel stretching product, the position design of each symmetrical node is the same as in Example 1, image 3 It is a schematic diagram of the product structure and manufacturing method of two or more rivets stretched in series (where n≥2, m≥2, indicating that the design includes two or more product structures). In order to ensure the uniformity of the pre-deformation treatment before use, the number of symmetrical structures of rivets in series and parallel connection Example 1 can be designed according to the specific use conditions.

[0064] Same as the method of use in Example 1, the Figure 4 The structural product is placed in a specific stretching device for uniform deformation, and ...

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Abstract

The invention provides a Ti base shape memory alloy rivet fastening piece and a manufacturing method thereof. The product is prepared by adopting a Ti base shape memory alloy; the shape is designed asa symmetric structure; two ends are rivet round heads or countersunk heads; and convex points are designed in the structure symmetric center. 2-4% of deformation is generated through symmetric stretching in production and process; then, a rivet finished product is obtained through cutting along the middle part of each convex point; and the connecting part is heated to recover an initial shape toachieve an excellent fastening effect. A special stretching device is designed for series connection or parallel connection of the same uniform pre-deformed rivet products obtained through consistentstretching and cutting. The manufacturing method is convenient, efficient and reliable, and is broad in application prospect.

Description

technical field [0001] The invention belongs to the technical field of connectors, in particular to a shape-memory alloy rivet fastener and a simple, reliable and mass-produced manufacturing method thereof. Background technique [0002] Conventional rivet fasteners are typically connected using an interference fit to reduce structural weight and significantly increase structural life. However, for traditional fasteners, the method of forced installation is used for connection during interference fit. Usually, due to the uneven plastic deformation of various parts of the fastener, radial non-uniform expansion occurs during recovery, which is easy to cause damage to the hole wall of the connected parts. crack damage. The shape memory alloy returns to a uniform deformation during the temperature-rising phase transformation process, which can completely restore the original shape. Therefore, in order to solve the problem of non-uniform deformation caused by the connection of tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00B23P15/00F16B19/04
Inventor 李启泉袁帅
Owner 烟台浩忆生物科技有限公司
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