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Axial extrusion type connecting method for aviation conduits

A connection method and extrusion connection technology, which is applied in the field of axial extrusion connection of aviation conduits, can solve the problems that it is difficult to ensure the reliability and connection strength of joint connections, and the inability to inspect conduits, etc., so as to prevent aircraft grounding and connect High efficiency, quick and easy on-site replacement

Active Publication Date: 2022-04-12
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, there is no use of axial extrusion connection technology for aviation conduit connection and systematic research on the entire connection process of axial extrusion technology. It is further impossible to check whether the conduit is inserted into the depth required by the conduit joint, and it is difficult to ensure the reliability of the joint connection. resistance and connection strength

Method used

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  • Axial extrusion type connecting method for aviation conduits
  • Axial extrusion type connecting method for aviation conduits
  • Axial extrusion type connecting method for aviation conduits

Examples

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Effect test

Embodiment 1

[0051] The process of the axial extrusion connection method of the aviation catheter is as described above. In this embodiment, the material of the catheter is TA18 titanium alloy, the diameter is 8 mm, and the wall thickness is 1 mm. Corresponding calculations: the length of the inspection mark is 7.8mm, the distance between the distal end of the inspection mark and the cross section of the catheter end is 21.8mm, the distance between the proximal end of the inspection mark and the cross section of the catheter end is 14mm; the length of the positioning mark is 8.9mm, and the distance between the distal end of the positioning mark and the catheter The section length of the end is 28mm, and the distance from the proximal end of the positioning mark to the end section of the catheter is 19.1mm; correspondingly, the depth L of the catheter inserted into the connector ranges from 14mm to 21.8mm. In this example, the specific value is 17mm. After testing, the catheter connector part...

Embodiment 2

[0055] The process of the axial extrusion connection method of the aviation catheter is as described above. In this embodiment, the material of the catheter is 1Cr18Ni9Ti stainless steel, the diameter is 16 mm, and the wall thickness is 1 mm. The calculation process of the length of the inspection mark 202, the distance between the inspection mark 202 and the section 101 at the end of the catheter, the length of the positioning mark 201, and the distance between the location mark 201 and the section 101 at the end of the catheter are the same as in Example 1. Correspondingly, the value range of the depth L of the catheter insertion joint is obtained as 27 mm to 37 mm, specifically 30 mm in this example, and the outer ring end 302 is within the positioning mark 201. After testing, the overall connection strength data of the catheter joint part is 29.3 kN.

Embodiment 3

[0059] The process of the axial extrusion connection method of the aviation catheter is as described above. In this embodiment, the material of the catheter is 5A02 aluminum alloy, the diameter is 12 mm, and the wall thickness is 1 mm. The length of the inspection mark 202, the distance between the inspection mark 202 and the section 101 at the end of the catheter, the length of the positioning mark 201, and the distance between the location mark 201 and the size of the section 101 at the end of the catheter are the same as in Example 1. Correspondingly, the depth L of the catheter inserted into the connector ranges from 18mm to 27mm, specifically 25mm in this example, the outer ring end 302 is within the positioning mark 201, after testing, the overall connection strength data of the catheter joint part is 20.7kN.

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Abstract

The invention relates to an axial extrusion type connecting method for aviation conduits, which belongs to the technical field of metal conduit connection and comprises the following steps: cleaning the end parts of the conduits and removing burrs on the inner and outer sides of the conduit ends; selecting a corresponding marking gauge according to the pipe diameter of the guide pipe, and drawing a positioning mark and an inspection mark on the guide pipe; the catheter connector is positioned on the catheter according to the positioning mark; the guide pipe and the connector are arranged in an axial extrusion type connecting tool, and an outer ring of the guide pipe connector is pressed into the pipe sleeve; checking whether the outer ring is completely pressed into the pipe sleeve by using an inspection measuring tool, and determining whether the insertion depth of the conduit into the joint is reasonable by observing the inspection mark. According to the method, the guide pipe does not need to be initially machined before connection, energy is saved, safety is achieved, and installation is fast; before connection, the catheter connector and the catheter are rapidly and accurately assembled according to the positioning mark, and after extrusion connection is completed, whether connection is reasonable or not can be rapidly and visually inspected through the inspection mark; the quick connector is suitable for quick connection of metal pipelines with the requirements for high working pressure, high connection strength and high use reliability.

Description

Technical field: [0001] The invention belongs to the technical field of connecting metal conduits, and in particular relates to an axial extrusion connection method for aviation conduits. Background technique: [0002] Aviation catheters are mainly used in the transmission systems of hydraulic pressure, fuel, environmental control, oxygen, etc. inside the aircraft, and are known as the blood vessels of the aircraft. At present, the commonly used connection methods of aviation metal conduits mainly include methods such as welding, flare connection, and non-flare connection. However, welded conduit joints have low strength, and conduits with flared connections have poor sealability, especially in high-pressure pipelines. The commonly used non-flare connections mainly include rolling type and radial extrusion type, but problems such as "running, popping, dripping, and leaking" often occur, and are suitable for piping systems with internal pressure of the catheter less than 28M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/00
CPCY02T50/40
Inventor 赵天章张铁森白雪山
Owner SHENYANG AEROSPACE UNIVERSITY