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Laser welding method for large-size thin-wall weakly rigid titanium alloy rudder wing structure

A laser welding and titanium alloy technology, which is applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problem that the thickness difference between the skin and the skeleton ribs is large, which affects the overall dimensional accuracy and the surface of the rudder wing structure. Solve problems such as sags, achieve the effect of excellent comprehensive mechanical properties of welds, good weld shape, and avoid weld surface sags

Inactive Publication Date: 2018-10-19
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, spot welding and seam welding are all pressure welding, and the welding process will cause the surface of the rudder wing structure to sag, affecting the overall dimensional accuracy
In addition, the thickness difference between the skin and the ribs of the skeleton is relatively large, and it is easy to cause low solder joint strength due to nugget offset during the welding process
[0004] At present, there are few researches on laser welding process and welding deformation control of large-size weakly rigid titanium alloy rudder wing structure, and key breakthroughs are needed to meet the development and production needs of model products

Method used

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  • Laser welding method for large-size thin-wall weakly rigid titanium alloy rudder wing structure
  • Laser welding method for large-size thin-wall weakly rigid titanium alloy rudder wing structure
  • Laser welding method for large-size thin-wall weakly rigid titanium alloy rudder wing structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The overall length of a certain type of booster air rudder is about 690mm, the width is about 500mm, the narrowest part of the skeleton rib is 8mm, and the skin thickness is 1.5mm.

[0054] Before laser welding, clean up impurities such as scale and oil within the range of (20-50) mm from the center of the weld.

[0055] Assemble the titanium alloy skin with the titanium alloy skeleton. When assembling, press the skin's to-be-welded position and the ribs of the skeleton so that the skin's to-be-welded position and the ribs fit closely, and the gap between the skeleton and the skin The butt joint gap between them is not more than 0.1mm, and the step difference is not more than 10% of the base metal wall thickness.

[0056] Fill the frame with protective gas to form a protective atmosphere inside the frame.

[0057] The position to be welded of the skin and the ribs of the skeleton are welded together by penetration welding, and the penetration welding adopts the intermi...

Embodiment 2

[0061] The overall length of the booster stabilizer of a certain model is about 850mm, the width is about 520mm, the narrowest part of the skeleton rib is 4mm, and the skin thickness is 1.5mm.

[0062] Before laser welding, clean up impurities such as scale and oil within the range of (20-50) mm from the center of the weld.

[0063] Assemble the titanium alloy skin with the titanium alloy skeleton. When assembling, press the skin's to-be-welded position and the ribs of the skeleton so that the skin's to-be-welded position and the ribs fit closely, and the gap between the skeleton and the skin The butt joint gap between them is not more than 0.1mm, and the step difference is not more than 10% of the base metal wall thickness.

[0064] Fill the frame with protective gas to form a protective atmosphere inside the frame.

[0065] The position to be welded of the skin and the ribs of the skeleton are welded together by penetration welding, and the penetration welding adopts the in...

Embodiment 3

[0069] The butt laser welding test of TA15 titanium alloy plates with a thickness of 1.5mm is carried out by adopting the laser process parameters of the present invention.

[0070] Before laser welding, clean up impurities such as scale and oil within the range of (20-50) mm from the center of the weld.

[0071] The titanium alloy butt joint test plate is compressed by a special welding tool. After compression, the butt joint gap of the plate is not greater than 0.1mm, and the butt joint step difference is not greater than 10% of the base metal wall thickness.

[0072] Pass argon gas to the back of the weld through the welding tool to protect the back of the weld.

[0073] When welding, the laser base power P 基 1000W, laser peak power P 峰 It is 1500W, the pulse width tp is 20ms; the welding speed v is 1000mm / min; the spot diameter D is 0.45mm, and the defocusing amount l is 0mm. 99.99% high-purity argon gas is used for internal and external protection, the front gas flow r...

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Abstract

The invention relates to a laser welding method for a large-size thin-wall weakly rigid titanium alloy rudder wing structure. The laser welding method comprises the following steps that a titanium alloy skin and a titanium alloy skeleton are assembled together; the skeleton is internally filled with protective gas to form a protective atmosphere inside the skeleton; the position to be welded of the skin and ribs of the skeleton are welded together by using penetration welding, and the penetration welding adopts intermittent welding with the length of each penetration welding line being 20mm and intervals between every two adjacent penetration welding lines being 20mm; butt welding is adopted to weld the skin and the circumferential ring of the skeleton together, and continuous welding is adopted for butt welding; pulse laser welding is used for both penetration welding and butt welding; and during welding, the skeleton is internally and continuously filled with the protective gas whilethe protective gas is used for front protection. By adopting the laser welding method, when the large-size weakly rigid titanium alloy rudder wing structure is welded, the welding lines are well formed, the overall deformation of the rudder wing structure is small, and the comprehensive mechanical properties of the welding lines are excellent.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a laser welding method for a large-size thin-walled weakly rigid titanium alloy rudder blade structure. Background technique [0002] With the development of aviation weapon equipment technology, its flight speed range, flight airspace and range have been greatly expanded, and its stealth capability, defense penetration capability and precision strike capability have been significantly improved, requiring higher structural efficiency and better dimensional accuracy of aviation weapon equipment , the structure is more lightweight. The rudder-wing structure is an important part of the flight attitude control of aviation weapons and equipment, and the dimensional accuracy and light weight of the rudder-wing structure are required to be higher. Due to its excellent high temperature strength, specific strength and low density, TA15 titanium alloy is increasingly used as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/242B23K26/12B23K26/60B23K103/14
CPCB23K26/123B23K26/242B23K26/60
Inventor 步贤政曲宏韬胡洋游东洋苏胜伟姚为
Owner BEIJING HANGXING MACHINERY MFG CO LTD