Light bolt fastening piece as well as manufacturing method and mold thereof

A bolt fastener, lightweight technology, applied in the direction of threaded fasteners, bolts, manufacturing tools, etc., can solve the problems of unguaranteed delivery cycle, high price, huge demand for light bolt fasteners, etc.

Active Publication Date: 2014-02-05
东方蓝天钛金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this patent is that the end of the light bolt fastener is ≤1.0P. The disadvantage is that the inclination angle of the cone section of the transition part is between 25° and 35°, and even a conservative design of 25° to 55° can be adopted. The length of light bolt fasteners is relatively long, and the weight loss is relatively small
[0007] At present, my country's aerospace industry is in a stage of vigorous development, and there is a huge demand for light bolt fasteners, but the imported ones are expensive, there is a problem of conversion between imperial and metric standards, and the delivery cycle cannot be guaranteed

Method used

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  • Light bolt fastening piece as well as manufacturing method and mold thereof
  • Light bolt fastening piece as well as manufacturing method and mold thereof
  • Light bolt fastening piece as well as manufacturing method and mold thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present invention will be further elaborated below in conjunction with the accompanying drawings. Such as figure 1 As shown, the present invention provides a lightweight bolt fastener, which is composed of a bolt head 1 , a polished rod section 2 , a transition section 3 and a threaded section 4 . The transition part 3 starts from the large-diameter polished rod section 2 and is connected with the root of the small-diameter threaded section 4 in a transition trend of gradually decreasing outer diameter. In the present invention, the generatrix of the light bolt transition part 3 (that is, the transition line from the proximal end of the maximum clamping length on the polished rod section to the beginning of the complete thread on the threaded section) is designed to be a smooth curve approximately sinusoidal, by the first Arc section L1, second arc section L2, front cone section Zt, third arc section L3, and rear cone section ZO are formed by a smooth transition fr...

Embodiment 2

[0031] The difference between this embodiment and embodiment 1 is that

[0032] The angle between the front cone section or its extension line and a straight line perpendicular to the bolt axis is the front cone section inclination angle At, and its angle range is 24 °; the rear cone section or its extension line is parallel to The included angle between a straight line in the axial direction of the bolt is the inclination angle A0 of the rear cone section, and the angle range thereof is 45°.

Embodiment 3

[0034] The difference between this embodiment and embodiment 1 is that

[0035] The included angle between the front cone section or its extension line and a straight line perpendicular to the bolt axis is the front cone section inclination angle At, and its angle range is 15 °; the rear cone section or its extension line is parallel to The included angle between a straight line in the axial direction of the bolt is the inclination angle A0 of the rear cone section, and the angle range thereof is 25°.

[0036] In summary, the present invention provides four technical measures, so that the inclination angle of the cone section is relatively small, the transition portion is relatively short, the length of the bolt is reduced, the transition portion is a smooth curve approximately sinusoidal, and the structure is more reasonable; the bolt tail The hexagonal plum blossom-shaped wrench hole has a large wrenching torque and relatively short wrench hole, which facilitates installatio...

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PUM

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Abstract

The invention relates to a light bolt fastening piece applied to aerospace. The generatrix of the transition part of the light bolt fastening piece is designed into a smooth curve similar to a sinusoid, the conical section slant angle of the transition part is relatively small, the transition part is relatively short, and the structure is relatively reasonable; the twist moment of a hexangular quincunx twist hole in the tail part of a bolt is larger, and the twist hole is relatively short, as a result, the mounting is facilitated, the length of the overall bolt is reduced, and a role of lightening is played; by using the mold of a light bolt transition vehicle-roll R, the week part of the transition part is ingeniously strengthened, the mold of a roll R is simple, the cost is low, the operation is simple and convenient, and the efficiency is higher; a twist pin matched with a light bolt fastening part for use can bear larger twist moment compared with a hexagonal twist pin, the length of the twist pin is further reduced, and the service life of the twist pin is prolonged.

Description

[0001] technical field [0002] The invention relates to a lightweight bolt fastener (also known as a high-lock bolt) for aerospace. The invention also relates to the processing method of the transition portion on the bolt fastener and the die for rolling R. Background technique [0003] In the field of aviation and aerospace, light bolt fasteners are widely used in the connection of airframe structures and important parts due to their light weight, high strength, and good fatigue performance. [0004] Western developed countries started earlier in research and production in this field. At present, there are mainly LiSi in France, SPS in the United States and Alcoa, each of which has its own method for the shape, structure and processing technology of light bolt fasteners, and has formed some relatively mature patents. For example, Heck International Corporation, a subsidiary of Alcoa, applied for a patent named "Light Threaded Fasteners and Rolling Dies" on October 5, 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04F16B23/00B23P15/00B25B23/00
Inventor 李顺安高慎金王晓亮李建华
Owner 东方蓝天钛金科技有限公司
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