Automatic TIG (Tungsten Inert Gas) welding method for liner-free single-side welding and double-side forming of aluminum alloy butted circular seam

A single-sided welding double-sided, welding method technology, applied in the field of aluminum alloy welding, can solve the problems of unsightly welding seam formation, girth welding seam edge collapse, easy generation of pores, etc., to enhance the degree of welding automation, welding heat affected zone Small, consistent ripple spacing

Inactive Publication Date: 2011-06-01
陕西国德电气制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the girth welds with aluminum alloy thickness less than 12 mm are mostly welded by double-sided welding and double-sided forming or single-sided welding and double-sided forming with backing. The edge of the welding seam is seriously collapsed and the deformation is serious, and it needs to be corrected after welding
Low production efficiency and high cost Weld formation is not beautiful, prone to defects such as pores, inclusions, lack of fusion, and incomplete penetration

Method used

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  • Automatic TIG (Tungsten Inert Gas) welding method for liner-free single-side welding and double-side forming of aluminum alloy butted circular seam
  • Automatic TIG (Tungsten Inert Gas) welding method for liner-free single-side welding and double-side forming of aluminum alloy butted circular seam
  • Automatic TIG (Tungsten Inert Gas) welding method for liner-free single-side welding and double-side forming of aluminum alloy butted circular seam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] An automatic TIG welding method for single-side welding and double-side forming of aluminum alloy butt joint without liner, including the following steps:

[0014] The first step is to use acetone to clean the oil around the butt joint of the cylinder before welding, and use a stainless steel wire wheel to remove the 50mm inner oxide film around the butt joint of the cylinder. The thickness of the cylinder is 8mm and the diameter is 200mm.

[0015] The second step is to preheat before welding, the temperature is 110°C, and the debugging control panel controls the welding current, voltage, welding speed, and wire feeding speed in real time. The specific parameters are as follows:

[0016]

[0017] The third step is to use an automatic argon tungsten arc welding machine for welding. The first layer is welded without adding welding wire to form the back, the second layer is filled with welding wire, the third layer is added with welding wire, and the welding torch swings...

Embodiment 2

[0020] The first step is to use acetone to clean the oil around the butt joint of the cylinder before welding, and use a stainless steel wire wheel to remove the 50mm inner oxide film around the butt joint of the cylinder. The thickness of the cylinder is 10mm and the diameter is 800mm.

[0021] The second step is to preheat before welding. The temperature is 130°C. The debugging control panel controls the welding current, voltage, welding speed and wire feeding speed in real time. The specific parameters are as follows:

[0022]

[0023] The third step is to use an automatic argon tungsten arc welding machine for welding. The first layer is welded without adding welding wire to form the back, the second layer is filled with welding wire, the third layer is added with welding wire, and the welding torch swings to form the cover.

[0024] After the first layer of welding, the back of the weld has the same height and width, and a 5mm deep groove is formed on the front of the w...

Embodiment 3

[0026] The first step is to use acetone to clean the oil around the butt joint of the cylinder before welding, and use a stainless steel wire wheel to remove the 50mm inner oxide film around the butt joint of the cylinder. The thickness of the cylinder is 11mm and the diameter is 1400mm.

[0027] The second step is to preheat before welding. The temperature is 140°C. The debugging control panel controls the welding current, voltage, welding speed and wire feeding speed in real time. The specific parameters are as follows:

[0028]

[0029] The third step is to use an automatic argon tungsten arc welding machine for welding. The first layer is welded without adding welding wire to form the back, the second layer is filled with welding wire, the third layer is added with welding wire, and the welding torch swings to form the cover.

[0030] After the first layer of welding, the back of the weld has the same height and width, and a 6mm deep groove is formed on the front of the ...

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Abstract

The invention relates to an automatic TIG (Tungsten Inert Gas) welding method for liner-free single-side welding and double-side forming of an aluminum alloy butted circular seam, which comprises the following steps of: before welding, cleaning greasy dirt at the periphery of a cylinder butted circular seam with acetone; removing an oxide film in the periphery of the cylinder butted circular seam by a stainless steel wire wheel; preheating before welding; debugging a control panel for controlling welding current and voltage, welding speed and wire feeding speed to match in real time; and welding by adopting an automatic TIG machine, wherein a welding wire is not added for back formation when a first layer is welded, a welding wire is added for filling when a second layer is welded, a welding wire is added when a third layer is welded, and a welding gun swings for cover surface forming. The automatic TIG welding method has the advantages of simple equipment, convenience in operation, stable welding, high welding speed, low production cost, fewer filled welding wires, fewer welding layers, small deformation, no need of correction after welding, attractive formed appearance and high welding seam quality and realizes welding automation.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy welding, in particular to an automatic TIG welding method for single-sided welding and double-sided forming of aluminum alloy butt ring seams without liners. Background technique [0002] Aluminum alloy is widely used in aerospace, shipbuilding, transportation, electric power and other industries due to its light weight, high specific strength, good corrosion resistance, non-magnetic properties, good formability and good low temperature performance. At present, the girth welds with aluminum alloy thickness less than 12mm are usually welded by double-sided welding and double-sided forming or single-sided welding and double-sided forming with backing. The edge of the weld seam is severely collapsed and the deformation is serious, and it needs to be corrected after welding. Low production efficiency, high cost, unsightly weld formation, easy to produce pores, inclusions, incomplete fusion, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/02B23K9/235B23K9/095
Inventor 张铁民袁东
Owner 陕西国德电气制造有限公司
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