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Method for airplane folding mechanism to resist stress corrosion

A folding mechanism and anti-stress technology, which is applied in aircraft parts, transportation and packaging, etc., can solve the problems of increasing the potential danger of stress corrosion, the upper limit of Al content, etc., and achieve the effect of excellent stress corrosion resistance

Active Publication Date: 2015-04-08
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selected material is mainly TA15 medium-strength titanium alloy, which has good tensile and fatigue properties, but the Al content in the alloy is higher than the upper limit, which increases the potential risk of stress corrosion

Method used

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  • Method for airplane folding mechanism to resist stress corrosion
  • Method for airplane folding mechanism to resist stress corrosion
  • Method for airplane folding mechanism to resist stress corrosion

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Embodiment Construction

[0013] Attached below figure 1 The present invention will be further described.

[0014] A kind of anti-stress corrosion method of aircraft folding mechanism of the present invention comprises the following steps:

[0015] Step 1. The parts are made of TA15 titanium alloy forgings with medium strength, high fatigue performance and high corrosion resistance. The streamline direction of the forgings is consistent with the main bearing direction of the parts.

[0016] Step 2: Process the welded joints to be smooth, clean and free of burrs, and maintain edges and corners. The surface roughness of the joints within 20mm from the welded joints is not greater than Ra3.2, and the thicknesses to be welded are 3.0±0.1mm and 3.5±0.1mm respectively; ensure The weld gap is not greater than 0.1mm, the maximum local gap (total length: 10% of the weld length or 100mm whichever is smaller) is not greater than 0.2mm, and the misalignment is not greater than 0.2mm.

[0017] Use manual argon ar...

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Abstract

The invention belongs to aviation structure designing technology and relates to a method for an airplane folding mechanism to resist stress corrosion. The method includes step one, selecting TA15 titanium alloy forgings to manufacture parts, wherein flow line direction of the forgings is uniform with main force bearing direction of the parts; step two, adopting electron beam welding and matched postweld heat treatment processes to reduce welding deformation of a web structure so as to lower residual internal stress; step three, removing weld reinforcement of upper and lower edge strips and inner and outer surfaces of a web after welding, and grinding to be Ra1.6; step four, subjecting the parts to integral sand spraying surface treatment after precision machining.

Description

technical field [0001] The invention belongs to the aviation structure design technology, and relates to a method for resisting stress corrosion of an aircraft folding mechanism. Background technique [0002] The folding mechanism is an important mechanism of the aircraft. The folding mechanism can change the shape of the aircraft, improve the effect of aerodynamic lift, and reduce the area occupied by the aircraft. The components of the folding mechanism are required to have high tensile, fatigue and stress corrosion properties. The selected material is mainly TA15 medium-strength titanium alloy, which has good tensile and fatigue properties, but the Al content in the alloy is higher than the upper limit, which increases the potential risk of stress corrosion. Therefore, the folding mechanism requires a stress corrosion resistant manufacturing method. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a method fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/01
Inventor 杨旭贺飞李红恩景禄路许广兴陈冬梅魏金龙王雪
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA