Machining method of aviation V-shaped groove hoop

A processing method and V-groove technology, applied in the processing field of clamps, to achieve the effect of overcoming large resistance, eliminating residual stress and improving spot welding quality

Active Publication Date: 2021-03-26
湖北超卓航空技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The good sealing of the V-groove clamp makes it a commonly used clamp in the aviation field, but its reliability needs further improvement

Method used

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  • Machining method of aviation V-shaped groove hoop

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides an aviation V-groove clamp processing method, including the following steps:

[0026] S1, processing bands and collars;

[0027] The processing process of the hoop and collar is to cut the steel strip into strips, stamp it into shape, then carry out vacuum heat treatment, and finally carry out magnetic polishing;

[0028] Vacuum heat treatment process: in a vacuum heat treatment furnace, the temperature is raised to 900°C at a rate of 80°C / h, kept for 40min, and the vacuum coefficient is 6x10 -5 Pa; furnace-cooled to 720°C and held for 8 hours, then furnace-cooled to 580°C at a rate of 120°C / h and held for 20 hours, then furnace-cooled to 350°C, and then quickly cooled to room temperature with nitrogen gas.

[0029] The magnetic polishing process parameters are: the diameter of the magnetic needle is 0.2mm, the length of the magnetic needle is 2mm, the weight ratio of the magnetic needle to the band or collar is 1:1; the amount of polishing liq...

Embodiment 2

[0033] This embodiment provides an aviation V-groove clamp processing method, including the following steps:

[0034] S1, processing bands and collars;

[0035] The processing process of the hoop and collar is to cut the steel strip into strips, stamp it into shape, then carry out vacuum heat treatment, and finally carry out magnetic polishing;

[0036] Vacuum heat treatment process: in a vacuum heat treatment furnace, the temperature is raised to 900°C at a rate of 80°C / h, kept for 40min, and the vacuum coefficient is 6x10 -5 Pa; furnace-cooled to 720°C and held for 8 hours, then furnace-cooled to 580°C at a rate of 120°C / h and held for 20 hours, then furnace-cooled to 350°C, and then quickly cooled to room temperature with nitrogen gas.

[0037] The magnetic polishing process parameters are as follows: the diameter of the magnetic needle is 0.4mm, the length of the magnetic needle is 4mm, the weight ratio of the magnetic needle to the band or collar is 2:1; the amount of po...

Embodiment 3

[0041] This embodiment provides an aviation V-groove clamp processing method, including the following steps:

[0042] S1, processing bands and collars;

[0043] The processing process of the hoop and collar is to cut the steel strip into strips, stamp it into shape, then carry out vacuum heat treatment, and finally carry out magnetic polishing;

[0044] Vacuum heat treatment process: in a vacuum heat treatment furnace, the temperature is raised to 900°C at a rate of 80°C / h, kept for 40min, and the vacuum coefficient is 6x10 -5 Pa; furnace-cooled to 720°C and held for 8 hours, then furnace-cooled to 580°C at a rate of 120°C / h and held for 20 hours, then furnace-cooled to 350°C, and then quickly cooled to room temperature with nitrogen gas.

[0045] The magnetic polishing process parameters are: the diameter of the magnetic needle is 0.6 mm, the length of the magnetic needle is 3 mm, the weight ratio of the magnetic needle to the band or collar is 3:1; the amount of polishing l...

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Abstract

The invention relates to a machining method of an aviation V-shaped groove hoop. The machining method comprises the following steps that a strap and a clamping ring are machined; the machining processof the strap and the clamping ring comprises the steps that a steel belt is punched and formed after being cut into strips, then vacuum heat treatment is conducted, and finally magnetic polishing isconducted; a bolt, a sleeve pipe, a gasket and a nut are machined; and the machined strap, clamping ring, bolt, sleeve pipe, gasket and nut are assembled, and spot welding is adopted for connection ofthe strap and the clamping ring. Compared with a common machining method of an aviation V-shaped groove hoop, the method combining vacuum heat treatment and magnetic polishing is adopted, residual stress generated in the forming process of the strap and the clamping ring can be effectively eliminated, oxidation films on the surface of the strap and the surface of the clamping ring are removed, the quality defects of large basic resistance of subsequent spot welding, serious splashing of a molten pool and the like caused by the oxidation films on the surfaces are overcome, the spot welding quality is improved, and then the reliability of the V-shaped hoop is improved.

Description

technical field [0001] The invention relates to a processing method for clamps, in particular to a processing method for aviation V-groove clamps. Background technique [0002] Aircraft pipeline connection clamps are responsible for sealing and docking in aircraft system pipelines, which determine the functional performance and long-term reliability of aircraft fuel and environmental control systems. With the gradual improvement of aircraft performance, the design concept of the pipeline system of the whole aircraft is gradually accepted by everyone, and at the same time, higher reliability requirements are put forward for the system pipeline connection clamps. The good sealing performance of the V-groove clamp makes it a commonly used clamp in the aviation field, but its reliability needs further improvement. Contents of the invention [0003] Based on this, it is necessary to provide an aviation V-groove clamp processing method, which can improve the reliability of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 李羿含徐建张清贵魏平郭富利
Owner 湖北超卓航空技术有限公司
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