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Automatic TIG gasket-free single-side welding and double-side molding process for aluminum alloy

A single-sided welding and double-sided forming technology, which is applied in the field of aluminum alloy welding, can solve the problems of low weld pass rate, low efficiency, and easy brittle weld area, and achieve high weld joint coefficient and weld pass rate High, excellent weld quality effect

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

Using the above welding method, there are the following problems: low efficiency, high labor intensity, unable to meet the needs of mass welding production; severe overheating of the weld seam, significantly low joint strength, and the weld seam area is prone to brittleness, and the weld seam within a plate thickness of 6 mm is easily Cracks are generated; the workpiece is seriously deformed, and the weld seam and heat-affected zone are obviously collapsed; the pass rate of the weld seam is low, and the pass rate of the weld seam is 70% on average after X-ray flaw detection (JB4730-2005II level)

Method used

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  • Automatic TIG gasket-free single-side welding and double-side molding process for aluminum alloy
  • Automatic TIG gasket-free single-side welding and double-side molding process for aluminum alloy
  • Automatic TIG gasket-free single-side welding and double-side molding process for aluminum alloy

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Effect test

Embodiment 1

[0019] An aluminum alloy automatic TIG liner-free single-sided welding and double-sided forming process, comprising the following steps:

[0020] The first step is to select welding equipment and materials, using an automatic TIG girth welding machine, which can control the welding current, arc voltage, welding speed and wire feeding speed. Argon gas above %, the welding wire adopts ER5356Φ1.6mm welding wire, the cerium tungsten electrode Φ is 4.8mm, and the nozzle diameter of the welding torch is 19mm.

[0021] The second step is assembly and cleaning. Assembly is carried out first, assembly accuracy: misalignment ≤ 0.5mm, gap ≤ 0.5mm, and then tack welding, using MIG semi-automatic unilateral point to fix the block and cylinder, and then use acetone and stainless steel wire The wheel removes the oil and oxide film within 50mm on both sides of the groove, refer to figure 1 , 6 ~ 8mm thick aluminum alloys 1 and 2 use I-shaped groove 3, the groove angle is 50°,

[0022] The t...

Embodiment 2

[0029] An aluminum alloy automatic TIG liner-free single-sided welding and double-sided forming process, comprising the following steps:

[0030] The first step is to select welding equipment and materials, using an automatic TIG girth welding machine, which can control the welding current, arc voltage, welding speed and wire feeding speed. Argon gas above %, the welding wire adopts ER5356Φ1.6mm welding wire, the cerium tungsten electrode Φ is 4.6mm, the nozzle aperture of the welding torch is Φ18mm,

[0031] The second step is assembly and cleaning. Assembly is carried out first, assembly accuracy: misalignment ≤ 0.5mm, gap ≤ 0.5mm, and then tack welding, using MIG semi-automatic unilateral point to fix the block and cylinder, and then use acetone and stainless steel wire The wheel removes the oil and oxide film within 50mm on both sides of the groove, refer to figure 2 10-14mm thick aluminum alloys 1 and 2 use a blunt V-shaped bevel 3 with a bevel angle of 70°.

[0032] T...

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Abstract

The invention discloses an automatic tungsten inert gas (TIG) gasket-free single-side welding and double-side molding process for aluminum alloy, which comprises the following steps of: selecting welding equipment and materials, performing assembly and clearing, performing tack welding, clearing grease dirt and oxide films in 50 millimeters of two sides of a groove by using acetone and a stainless steel wire wheel, placing a shell on a welding operation rack, regulating a welding gun to be aligned with the groove, preheating, welding a first layer without adding welding wires, clearing the oxide film on the surface of the seam by using the stainless steel wire wheel after the first layer is welded to expose metal luster, welding a second layer, adding the welding wires for covering the surface, and making the welding direction of the welding gun and a cylinder swing vertically to form a seam. The process has the advantages of high efficiency, low labor intensity, high welding quality, attractive appearance, no undercut or arc crater cracks, workpiece deformation resistance and high seam qualification rate.

Description

technical field [0001] The invention relates to the field of aluminum alloy welding, in particular to an aluminum alloy automatic TIG padless single-sided welding and double-sided forming process. Background technique [0002] For aluminum alloys with a thickness of 6-14mm, the traditional welding methods mostly use double-sided welding with opening grooves, or single-sided welding and double-sided forming with gaskets. Using the above welding method, there are the following problems: low efficiency, high labor intensity, and cannot meet the needs of mass welding production; the weld seam is seriously overheated, the joint strength is obviously low, and the weld seam area is prone to brittleness, and the weld seam within 6mm thickness is easy to Cracks are generated; the workpiece is seriously deformed, and the weld seam and heat-affected zone are obviously collapsed; the pass rate of the weld seam is low, and the pass rate of the weld seam is 70% on average after X-ray flaw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/02B23K9/095B23K9/235B23K33/00
Inventor 张铁民袁东
Owner 陕西国德电气制造有限公司
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