Method for welding thick aluminum alloy plate

A welding method and aluminum alloy technology, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problems of difficult control of welding deformation and low connection strength, and achieve the elimination of welding residual stress and improve mechanical properties , the effect of reducing labor intensity

Inactive Publication Date: 2012-02-29
中国航天科工集团第二研究院二一〇所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to overcome the deficiencies of the prior art, the present invention provides a welding method for aluminum alloy thick plates, which is low in production cost and eas

Method used

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  • Method for welding thick aluminum alloy plate
  • Method for welding thick aluminum alloy plate
  • Method for welding thick aluminum alloy plate

Examples

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Effect test

example 1

[0042] The box-type hanging frame made of Al-Mg 5A06-H112 aluminum alloy plate is tailor-welded from aluminum alloy plates with a width of about 200mm and a plate thickness of about 60mm. The frame is 1m square and large in size. Dimensional accuracy requires ±0.5mm.

[0043] The welding of the box-type hanging frame adopts Miganic Flex 5000 melting electrode argon arc welding machine equipment, and the two ends of the aluminum plate to be welded are fixed and welded firmly by means of internal support and external pressure. The welding parameters are shown in Table 2.

[0044] Table 25A06 (60mm) MIG welding process parameters

[0045]

[0046] Conduct X-ray flaw detection on the welded joints, and evaluate the welds in accordance with QJ176A-99 "General Technical Conditions for Fusion Welding of Ground Equipment" to meet the requirements of Class I welds.

[0047] Necessary heat treatment for the welded box-type hanging frame can effectively reduce stress. After welding...

example 2

[0049] The box-type hanging frame made of Al-Mg 5A06-H112 aluminum alloy thick plate is tailor-welded from aluminum alloy plates with a width of about 220mm and a plate thickness of about 65mm. The frame is 1.2m square and large in size. Dimensional accuracy requires ±0.5mm.

[0050] The welding of the box-type hanging frame adopts Miganic Flex 5000 melting electrode argon arc welding machine equipment, and the two ends of the aluminum plate to be welded are fixed and welded firmly by means of internal support and external pressure. The welding parameters are shown in Table 3.

[0051] Table 35A06 (65mm) MIG welding process parameters

[0052]

[0053] Conduct X-ray flaw detection on the welded joints, and evaluate the welds in accordance with QJ176A-99 "General Technical Conditions for Fusion Welding of Ground Equipment" to meet the requirements of Class I welds.

[0054] Necessary heat treatment for the welded box-type hanging frame can effectively reduce stress. After...

example 3

[0056] The box-type hanging frame made of Al-Mg 5A06-H112 aluminum alloy thick plate is tailor-welded from aluminum alloy plates with a width of about 180mm and a thickness of about 55mm. The frame is 0.9m square and large in size. Dimensional accuracy requires ±0.5mm.

[0057] The welding of the box-type hanging frame adopts Miganic Flex 5000 melting electrode argon arc welding machine equipment, and the two ends of the aluminum plate to be welded are fixed and welded firmly by means of internal support and external pressure. The welding parameters are shown in Table 4.

[0058] Table 45A06 (55mm) MIG welding process parameters

[0059]

[0060] Conduct X-ray flaw detection on the welded joints, and evaluate the welds in accordance with QJ176A-99 "General Technical Conditions for Fusion Welding of Ground Equipment" to meet the requirements of Class I welds.

[0061] Necessary heat treatment for the welded box-type hanging frame can effectively reduce stress. After weldi...

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Abstract

The invention discloses a method for welding a thick aluminum alloy plate. The method comprises the following steps of: blanking from a large aluminum plate according to a specified size: butting two opposite edges to be welded and forming two U-shaped welding grooves on the upper surface and the lower surface of the thick aluminum alloy plate; washing an aluminum alloy and a welding wire with acetone, removing oxidation films on the surfaces of the U-shaped welding grooves, and wiping; and welding the U-shaped welding grooves by using an inverted consumable electrode argon arc welding machine of which the maximum output current is 500 A, welding, annealing, and performing relief annealing in a subsequent further machining process. In the method, preheating is not required before welding, so that the labor intensity is effectively lowered, the mechanical property of a welding joint is improved, the internal quality of a weld seam of a thick aluminum plate is improved, and the welding strength is required to be over 90 percent of parent substrate strength.

Description

technical field [0001] The invention belongs to the advanced molding and process technology in the field of advanced manufacturing technology, and relates to a material welding method. Background technique [0002] The techniques that can be used for welding 60mm thick aluminum alloy include argon tungsten arc welding, argon metal arc welding, vacuum electron beam welding, plasma arc welding, friction stir welding and other technical approaches. [0003] 1. Argon arc welding [0004] Due to the high thermal conductivity of aluminum, it dissipates heat quickly when it is melted. When the thick aluminum alloy plate is assembled and welded, it is sometimes necessary to preheat before welding. If the thickness of argon tungsten arc welding aluminum material exceeds 10mm, the thickness of aluminum material for argon metal arc welding exceeds 15mm, and the thickness of aluminum material for tungsten electrode and helium arc welding exceeds 25mm, the assembly needs to be preheated...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K33/00C22F1/04B23K103/10
Inventor 赵征张云燕李碧芳刘海涛苏生华李成禄
Owner 中国航天科工集团第二研究院二一〇所
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