Tungsten argon arc welding method and welding equipment for preventing weld seam oxidation

A technology of argon tungsten arc welding and welding method, which is applied in the direction of welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of reverse oxidation of weld seam, reduce the mechanical properties of weld seam, turbulent flow of inert protective gas, etc., and achieve anti- Oxidation protects weld seam oxidation, ensures welding quality, and avoids the effect of weld seam oxidation

Active Publication Date: 2021-03-30
成都裕鸢航空智能制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When argon arc welding is used to weld the thin wall of the closed cavity, due to the need to penetrate the thin wall, this will make the reverse side of the weld prone to oxidation, which will reduce the mechanical properties of the weld, and at the same time It will also be accompanied by the appearance of welding defects such as undercut and air holes, which will seriously affect the welding quality of the closed cavity
At present, the main means to solve the problem of weld oxidation is to inject an inert protective gas near the weld area during the welding process. However, due to the particularity of the structure of the closed cavity part itself, the only way to fill the inert protective gas as a whole To prevent the occurrence of oxidation reaction, but this overall filling method will cause the inert protective gas to form a turbulent flow phenomenon, which cannot guarantee the complete discharge of the air in the closed cavity, so that it cannot effectively inhibit the occurrence of weld oxidation.

Method used

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  • Tungsten argon arc welding method and welding equipment for preventing weld seam oxidation
  • Tungsten argon arc welding method and welding equipment for preventing weld seam oxidation
  • Tungsten argon arc welding method and welding equipment for preventing weld seam oxidation

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Embodiment 1

[0062] refer to figure 1 , figure 1 It is a schematic flow chart of a welding method of argon tungsten arc welding for preventing weld seam oxidation provided by the present invention. The argon tungsten arc welding method for preventing weld seam oxidation comprises the following steps:

[0063] Step S1, obtaining information about the mechanical structure of the part to be welded with a sealed cavity, and forming a corresponding welding tool according to the mechanical structure information;

[0064] Step S2, joining and assembling the welding tool and the part to be welded, so that the air passage of the welding tool and the part to be welded form a specific pose relationship;

[0065] Step S3, inputting protective gas into the air channel, so that the flow state of the protective gas in the air channel meets the corresponding fluid transmission conditions;

[0066] Step S4, under the condition that the shielding gas satisfies the fluid transmission condition, welding th...

Embodiment 2

[0112] refer to Figure 2 to Figure 5 , The embodiment of the present invention provides a gas tungsten arc welding tool for preventing weld seam oxidation. The welding tool is suitable for the welding operation of the pipe wall of a thin-walled tubular test piece with a large diameter to form a sealed cavity.

[0113] The welding tooling includes a chassis 1, an end cover 2, a tensioning assembly, a mesh piece 4, an adhesive tape 5, and the like.

[0114] Wherein, the chassis 1 is provided with a first sealing ring 11 and an exhaust port 12, the size of the first sealing ring 11 matches the size of the end of the tubular test piece 6, and the exhaust port 12 is located inside the first sealing ring 11 .

[0115] The end cover 2 is provided with a second sealing ring 21 and an air inlet 22, the size of the second sealing ring 21 is also adapted to the size of the end of the tubular test piece 6, and the air inlet 22 is located inside the second sealing ring 21 . The outside...

Embodiment 3

[0124] refer to Figure 6 and Figure 7 , The embodiment of the present invention provides a gas tungsten arc welding tool for preventing weld seam oxidation. The welding tool is suitable for the welding operation of the pipe wall of a thin-walled tubular test piece with a large diameter to form a sealed cavity. The structure of the welding tool of this embodiment is basically the same as that of the second embodiment, and the similarities will not be repeated. The difference lies in the structure of the tensioning component.

[0125] refer to Figure 7 , in the present embodiment, the tightening assembly includes a tightening screw 3 and a nut 31, one end of the tightening screw 3 in the present embodiment is provided with a fixed cap end, and the other end is provided with an external thread; the nut 31 is provided with an internal thread, and The threaded end of tension screw rod 3 cooperates. During assembly, the tension screw 3 is installed on the chassis 1 and the end...

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Abstract

The invention provides a tungsten argon arc welding method and a welding tool for preventing weld seam oxidation. The method uses the welding tool to input protective gas and adjusts the flow state of the protective gas so that the protective gas can flow without turbulence. Fully fill the inside of the sealed cavity and completely repel the air inside the sealed cavity, thereby effectively protecting the weld area from oxidation and avoiding the oxidation of the weld during the welding process; the welding tool provided by the present invention, according to The structural characteristics of the thin-walled tubular test piece and the above-mentioned method are used to design. The welding tool and the tubular test piece cooperate to form a sealed cavity. Under the action of the grid, the filled protective gas fills the sealed cavity without turbulence, ensuring The side is filled with protective gas to effectively prevent the oxidation of the back side of the weld.

Description

technical field [0001] The invention relates to the technical field of argon arc welding technology, in particular to a tungsten argon arc welding method and a welding tool for preventing weld seam oxidation. Background technique [0002] When argon arc welding is used to weld the thin wall of the closed cavity, due to the need to penetrate the thin wall, this will make the reverse side of the weld prone to oxidation, which will reduce the mechanical properties of the weld, and at the same time It will also be accompanied by the occurrence of welding defects such as undercut and pores, which will seriously affect the welding quality of the closed cavity. At present, the main method to solve the problem of weld oxidation is to inject inert protective gas near the weld area during the welding process. However, due to the particularity of the structure of the closed cavity parts, the only way to fill inert protective gas as a whole To prevent the occurrence of oxidation reacti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/235B23K9/32
CPCB23K9/167B23K9/235B23K9/32B23K9/325
Inventor 周继德刘勇涛
Owner 成都裕鸢航空智能制造股份有限公司
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