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Efficient combined automatic TIG welding technology of butt joint of thick plates

A welding process and combined technology, used in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the complicated root cleaning and root sealing welding procedures, high requirements for workpiece assembly accuracy, and unstable welding seam forming quality. and other problems, to achieve the effect of improving welding efficiency, low assembly accuracy requirements, and stable welding quality.

Inactive Publication Date: 2017-02-08
CFHI DALIAN HYDROGENANT REACTOR +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] According to the above-mentioned technical problems, a thick plate butt joint high-efficiency combined automatic TIG welding process is provided to solve the existing narrow-gap TIG welding process when thick plates are welded. Waste of welding materials, single-sided welding and double-sided forming technology in the groove require high assembly accuracy of the workpiece, difficult process control, unstable weld forming quality, etc.

Method used

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  • Efficient combined automatic TIG welding technology of butt joint of thick plates
  • Efficient combined automatic TIG welding technology of butt joint of thick plates

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Embodiment 1

[0044] Embodiment 1. This embodiment provides a high-efficiency combined automatic TIG welding process for butt jointing of 100 mm thick S30408 ​​stainless steel plates, including the following steps:

[0045] (1) The groove adopts figure 1 The single-sided U-shaped narrow gap groove with a blunt edge shown in the figure has a bevel angle of 2°, a root blunt edge of 12mm, an assembly clearance of 0-1mm, and an offset of 1mm. The groove is made by mechanical processing. processing.

[0046] (2) Before welding, use a clean white cloth dipped in acetone solution to wipe the inner and outer surfaces of the groove within 50mm from the edge of the groove to remove oil and other impurities that affect the welding quality.

[0047] (3) Automatic deep-hole TIG root sealing welding is used for root sealing and self-fluxing welding. The diameter of the selected tungsten electrode is 6.3mm. The process specification is: welding current 480A~500A, arc voltage 18V~20V, welding speed 200mm / ...

Embodiment 2

[0051] Embodiment 2. This embodiment provides a high-efficiency combined automatic TIG welding process for the butt joint of 120mm thick SA508-3 steel plates for nuclear power, including the following steps:

[0052] (1) The groove adopts figure 1 The single-sided U-shaped narrow-gap bevel with a blunt edge is shown, the bevel angle is 2.1°, the root blunt edge is 10mm, the assembly clearance is 0-1mm, and the misalignment is 1mm. The groove is processed by mechanical processing. .

[0053] (2) Before welding, use a clean white cloth dipped in acetone solution to wipe the inner and outer surfaces of the groove within 50mm from the edge of the groove to remove oil, rust and other impurities that affect the welding quality.

[0054] (3) Automatic deep-hole TIG root sealing welding is used for root sealing and self-fluxing welding. The diameter of the selected tungsten electrode is 6.3mm. The process specification is: welding current 450A~470A, arc voltage 18V~20V, welding speed...

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Abstract

The invention discloses an efficient combined automatic TIG welding technology of butt joint of thick plates. The efficient combined automatic TIG welding technology comprises the steps of S1, processing connection parts of to-be-welded workpieces into single-surface grooves with blunt edges; S2, carrying out autogenous welding of the blunt edges at the outer parts of the grooves through adopting automatic deep hole type TIG root sealing welding, so as to achieve double-side molding through single-side welding; and S3, filling the grooves through adopting automatic narrow gap TIG filling welding. According to the efficient combined automatic TIG welding technology of butt joint of the thick plates, the advantages of two automatic TIG welding methods of automatic deep hole type TIG root sealing welding and automatic narrow gap TIG filling welding are combined, the welding quality is stable, the welding efficiency is high, the practicability is high, and the comprehensive cost is low.

Description

technical field [0001] The invention relates to the field of material welding, and relates to a high-efficiency combined automatic TIG welding process for butt jointing of thick plates. Background technique [0002] At present, welding technology is widely used in metallurgy, machinery, shipbuilding, petrochemical, marine equipment, nuclear power equipment and other fields. [0003] As an advanced welding technology, narrow gap welding technology is widely used in thick plate welding, which has the advantages of good weld quality, saving welding material cost and high efficiency. [0004] At present, narrow gap welding methods that are widely used in engineering include narrow gap submerged arc welding, narrow gap MIG welding and narrow gap non-MIG welding (narrow gap TIG). Compared with the previous two welding methods, narrow gap TIG welding has the characteristics of small welding heat input, more stable welding quality, and green welding process. For the welding of thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/095B23K101/16
CPCB23K9/095B23K9/167B23K2101/16
Inventor 谷文冯东旭艾丹凤王鑫李洋
Owner CFHI DALIAN HYDROGENANT REACTOR
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