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A bolt with a transition zone and its transition structure

A transition zone and bolt technology, applied in the direction of screws, nuts, connecting components, etc., can solve the problems of damage to the base body and bolts, decrease in installation quality, installation damage, etc., and achieve the effect of shortening the distance, reducing the thread length, and avoiding installation damage.

Active Publication Date: 2022-03-22
AEROSPACE PRECISION PROD INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the installation process of interference fit, when the bolt is pressed (or driven) into the hole, it is easy to cause installation damage (such as the bolt scraping off the mounting plate material), which affects the fatigue life of the joint. Improper pressing force value and pressing method can easily damage the substrate and Bolts are damaged, resulting in a decline in installation quality and affecting the fatigue of the overall structure

Method used

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  • A bolt with a transition zone and its transition structure
  • A bolt with a transition zone and its transition structure
  • A bolt with a transition zone and its transition structure

Examples

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Effect test

Embodiment Construction

[0018] In order to better understand the present invention, the present invention will be described in detail below in conjunction with specific drawings.

[0019] The bolt with transition zone provided by the present invention, such as Figure 1-2 , the rod part 2 includes a polished rod part 21, a transition zone 22 and a threaded part 23, the transition zone 22 is connected between the polished rod part 21 and the threaded part 23, and the transition zone 22 has four successively tangent arcs C 1 、C 2 、C 3 、C 4 , arc C 1 Tangential connection with polished rod part 21, arc C 4 It is connected with the tail end 231 of the threaded part 23 .

[0020] The rod part 2 is connected with a head 1, and the head 1 may be a countersunk head or a flat head.

[0021] A bottom hole 3 is opened on the free end surface of the rod part 2, and the bottom hole 3 may be a hexagonal structure or a five-shaped structure, which has a certain wrenching performance, so that the bolt can be a...

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Abstract

The invention provides a bolt with a transition area and a transition structure. The shank of the bolt includes a polished shank, a transition area, and a threaded portion. The transition area is connected between the polished shank and the threaded portion. The transition area has four stages Tangent arc C 1 、C 2 、C 3 、C 4 , arc C 1 Tangential connection with the bare rod, arc C 4 Connects to the end of the threaded part. The invention can protect the base body and the bolts during interference fit installation and use, avoid installation damage and improve the fatigue life of the installation structure.

Description

technical field [0001] The invention belongs to the field of aerospace fasteners, and in particular relates to a bolt with a transition zone and a transition structure thereof. Background technique [0002] High-lock bolts and high-lock nuts can be used in conjunction with high-efficiency single-sided tightening operations. They have the characteristics of high strength, light weight, simple assembly, small size, strong anti-loosening ability, good fatigue resistance, and high assembly efficiency. They are widely used in Fastening connections in aviation, aerospace and other fields. Interference fit connection is a commonly used installation method for structural connections. Using interference fit connection can double the fatigue strength of joints. A large number of interference fit fasteners are used in the manufacture of advanced aircraft, especially titanium alloy high-lock bolts, which are used as interference fit fasteners, which can bring about the dual effects of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B35/04F16B37/00F16B13/10
CPCF16B13/04F16B35/041F16B37/00F16B13/10
Inventor 贾晓娇林忠亮郑文斌吴琳琅柴金宝刘本领
Owner AEROSPACE PRECISION PROD INC LTD
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