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Vacuum electron beam welding method for special-shaped thin-walled metal plate welding structure cabin

A vacuum electron beam and electron beam welding technology, which is applied in the field of material welding, can solve problems such as difficult to ensure weld quality, small structural rigidity, and large welding deformation, so as to avoid electron beam cutting effect, reduce assembly requirements, and improve weld seam Shaped effect

Inactive Publication Date: 2017-02-15
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The special-shaped thin-walled sheet-welded structure cabin involves unequal thickness butt joints, and its structural rigidity is small. It is difficult to guarantee the quality of the weld using traditional welding methods, and the welding deformation is large

Method used

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  • Vacuum electron beam welding method for special-shaped thin-walled metal plate welding structure cabin
  • Vacuum electron beam welding method for special-shaped thin-walled metal plate welding structure cabin
  • Vacuum electron beam welding method for special-shaped thin-walled metal plate welding structure cabin

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Embodiment Construction

[0020] The following describes the present invention in detail with reference to the drawings and embodiments:

[0021] A vacuum electron beam welding method for a special-shaped thin-walled sheet welding structure cabin, which includes the following steps:

[0022] Step 1: Preparation before welding;

[0023] Step 2: Welding and assembly;

[0024] Step 3: Electron beam welding;

[0025] Step 4: Quality inspection after welding.

[0026] The described step 1: pickling the tank section to be welded to remove the surface oil and oxide film, drying at 50-80°C for 20-30 minutes, after completion, use a wire brush to polish the welded area to a bright metallic luster. And wipe it clean with acetone.

[0027] The described step 2: Use welding tooling to assemble the section to be welded to ensure that the assembly position is correct, the gap between the surfaces to be welded is not greater than 0.2mm, and the amount of misalignment is not greater than 0.2mm. After the assembly is completed, h...

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Abstract

The invention belongs to a vacuum electron beam welding method aiming at a special-shaped thin-walled metal plate welding structure cabin. The vacuum electron beam welding method comprises the following steps: firstly, preparation before welding; secondly, welding and assembling; thirdly, electron beam welding; fourthly, quality inspection after welding. The vacuum electron beam welding method has the advantages that: chemical cleaning and mechanical cleaning are performed before welding, so that the defects, such as air holes and slag inclusion, are formed by welding seams because of oil contamination and oxidant on the surface of a workpiece can be effectively avoided; pre-welding is performed by using a focalized small current electron beam, so that the welding and assembling requirements of the cabin can be reduced, and an electron beam cutting effect caused by an overlarge butt gap can be avoided; meanwhile, a welding seam can also be preheated, and the possibility of the air holes and cracks of a joint can be reduced; the formation of a welding seam surface can be improved by performing typical welding by using a focalized large current electron beam, so that one-time welding formation can be realized, and the welding deformation caused by modification welding is avoided. The formation of the welding seam can be improved and the possibility of air holes of the joint can be reduced by using scanning electron beam current.

Description

Technical field [0001] The invention belongs to a material welding method, and in particular relates to a vacuum electron beam welding method for a special-shaped thin-wall sheet welding structure cabin. Background technique [0002] The development of the aerospace industry has also put forward higher technical index requirements for the structural parts of important products. Some cabins have gradually changed from regular revolving structures to complex special-shaped thin-walled structures. The processing methods have also changed from traditional casting / machining processes. The method evolved from the frame and skin sheet welding structure. Special-shaped thin-walled sheet-welded structural cabins involve butt joints of unequal thickness, and their structural rigidity is small. It is difficult to guarantee the quality of the weld seam using traditional welding methods, and the welding deformation is large. Summary of the invention [0003] The purpose of the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/06
CPCB23K15/06
Inventor 张鑫孙少波李宏伟任金欣李保永王志敏姚为李艳丽
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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