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Welding method for performing submerged-arc welding of large groove gaps

A groove gap, welding method technology, applied in welding equipment, welding accessories, arc welding equipment and other directions, can solve the problems of reducing welding quality, affecting production progress, low welding efficiency, etc., to improve welding efficiency, reduce production costs, The effect of improving welding quality

Active Publication Date: 2019-02-22
SHANGHAI JIANGNAN CHANGXING SHIPBUILDING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of steel structure construction, due to the influence of factors such as precision control and the skill level of construction personnel, there is an out-of-tolerance gap in the submerged arc welding groove, resulting in burn-through during the welding process
At present, when encountering such problems, the melting electrode gas shielded welding is mainly used to replace the welding, and the welding efficiency is low. Due to the influence of the welder's skills and the construction environment, cracks are easily generated in the bottom weld welding, which reduces the welding quality.
However, the measures of reassembly or plate replacement will seriously affect the production progress and increase the production cost.

Method used

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  • Welding method for performing submerged-arc welding of large groove gaps
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  • Welding method for performing submerged-arc welding of large groove gaps

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention is described below through specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily confusing the concept of the present invention.

[0026] In this embodiment, the welding scheme of the present invention is specifically described by taking the EH36 steel plate with a thickness of 20mm as one-sided welding and double-sided forming butt welding.

[0027] like Figure 1-Figure 4 As shown, this embodiment is used for the welding method of submerged arc welding with large groove gap, and the method includes the following steps:

[0028] Step 1, paste the glass fiber pottery liner 2 on the back of the ...

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Abstract

The invention discloses a welding method for performing submerged-arc welding on large groove gaps. The welding method specifically comprises the following steps of when the groove gap of a welding seam is within a range of 9-12mm (called a large groove gap), attaching a glass fiber pottery liner to the back of a welding groove; paving metal powder in the welding groove; and welding a backing weld; welding a stuffing weld, and welding a covering weld. The welding method disclosed by the invention is easy to operate, and convenient to use; a method of attaching the glass fiber pottery liner andpaving the metal powder is adopted, so that submerged arc automatic welding, one-side welding and dual-side shaping of tolerance of the assembling groove gaps are realized, the welding efficiency isimproved, during repairing course of the groove, the waste of materials is reduced, the production cost is reduced, and the welding quality is improved.

Description

technical field [0001] The invention belongs to the field of steel structure welding, and in particular relates to a welding method for submerged arc welding with a large groove gap. Background technique [0002] Submerged arc automatic welding is a high-efficiency automatic welding method. Compared with MIGA welding or other welding methods with excellent performance, it has higher production efficiency, higher weld quality, saving welding materials and energy, and better working conditions. Therefore, it can be used as one of the main welding method choices for steel structure construction. [0003] In the process of steel structure construction, due to the influence of factors such as precision control and the skill level of construction personnel, there is an out-of-tolerance submerged arc welding groove gap, resulting in burn-through during the welding process. At present, when encountering such problems, gas metal shielded welding is mainly used to replace welding, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18B23K9/235B23K9/32
CPCB23K9/18B23K9/235B23K9/32
Inventor 许承熙刘磊
Owner SHANGHAI JIANGNAN CHANGXING SHIPBUILDING
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