Connecting method of connected part

A connection method and a technology of connectors, which are applied in the field of materials, can solve problems such as poor fatigue life gain and lower structural static strength, and achieve the effects of increasing reliability and tightness, improving joint strength, and improving fatigue life

CN104329326AInactive Publication Date: 2015-02-04HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-02-04
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention provides a connecting method of a connected part. The method comprises the following steps: (1) preparing a T-shaped shape memory alloy with a high phase transition temperature for serving as a connecting rod and a memory alloy with a low phase transition temperature for serving as a fastening ring, inserting the end part of the connecting rod into a connecting hole of the connected part, and arranging the fastening ring on the connecting rod in a sleeving manner in order that the connected part is positioned between the connecting rod and the fastening ring; (2) heating the end part of the connecting rod, increasing the diameter of the connecting rod and gradually reducing the inner diameter of the fastening ring at the room temperature in order to fix the connecting rod together with the fastening ring and realize impact-free connection of the connected part. In the connecting method, impact-free connection with pre-tightening force is adopted, and uniform interference can be formed on an entire riveting part, so that the fatigue life gain of the connected part is increased.
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Description

technical field

[0001] The invention relates to the field of material technology, in particular to a connection method for connected parts. Background technique

[0002] Resin-based composite materials have unique advantages such as high specific strength and specific modulus, strong designability, and good fatigue resistance, and are widely used in the aerospace field. In applications, resin-based composite materials are often connected with traditional metal skeletons, and the connection forms are mostly openings and rivets. The opening of the hole cuts the fiber reinforcement in the composite material, and at the same time forms a high-stress area at the edge of the hole. After the hole is opened, the composite material is generally mechanically connected together by aluminum alloy or titanium alloy rivets. The impact effect, and the anisotropy of the composite material plate makes the edge area of ​​the hole produce peeling stress due to the edge effect when impacted, w...

Examples

Embodiment Construction

[0015] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0016] The TiNiNb memory alloy and TiNi alloy that the present invention selects for use, wherein TiNiNb composition mainly is Ti 45-X Ni 46+X Nb9at% (x=0~5), its martensitic transformation initiation temperature can be adjusted at -60~-20°C. TiNi alloy composition is mainly Ti 51.5-X Ni 48.5+X (x=0~3), the martensitic transformation initiation temperature can be adjusted at -40~-20°C. The raw materials used for TiNiNb alloy and TiNi alloy are 0-grade industri...