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Bolt with transition area and transition structure of bolt

A transitional structure and transition zone technology, applied in the direction of screws, nuts, connecting components, etc., can solve the problems of substrate and bolt damage, lower installation quality, and affect joints, etc., to achieve the goal of shortening distance, reducing thread length, and reducing overall weight Effect

Active Publication Date: 2019-01-18
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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  • Bolt with transition area and transition structure of bolt
  • Bolt with transition area and transition structure of bolt
  • Bolt with transition area and transition structure of bolt

Examples

Experimental program
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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. A rod part of the bolt comprises a smooth rod part, a transition part and a thread part. The transition area is connected between the smooth rod part and the thread part and provided with four segments of arcs C1, C2, C3, and C4 which are tangent to one another in sequence, the arc C1 is connected with the smooth rodpart, and the arc C4 is connected with the tail portion of the thread part. A base body and the bolt can be protected in interference with cooperative installation and use, formation of installation damage is avoided, and the fatigue life of an installation structure is prolonged.

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 Applications(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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