Double-wire welding method

A welding method and welding groove technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of large heat input in submerged arc welding, welding deformation, cumbersome procedures, etc., and achieve the effect of low heat input

Inactive Publication Date: 2019-07-19
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Since submerged arc welding requires the use of granular flux, the welding needs to be removed after welding, resulting in cumbersome procedures
Moreover, due to the large heat input of submerged arc welding, welding deformation is easy to occur, which has a bad influence on welding accuracy

Method used

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] The embodiment of the present invention provides a kind of twin-wire welding method, and this method is applicable to EQ70 high-strength steel, such as figure 1 As shown, the welding method includes:

[0035] Step 101: Process welding grooves on each workpiece.

[0036] Step 102: Assemble the welding grooves of the workpieces together.

[0037] In the above implementation mode, when two workpieces need to be welded together, the welding grooves of the two workpieces can be butted together, and the welding grooves of the two workpieces can be positioned and docked by means of clamping tooling or spot welding Together, the specific positioning manner is not limited in this application.

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Abstract

The invention discloses a double-wire welding method and belongs to the technical field of welding. The welding method comprises the following steps that a welding groove is machined in each workpiece; welding grooves of the workpieces are assembled together; the welding grooves are welded through double-wire welding, a pulse welding mode is adopted by a front wire of the double-wire welding, thewelding grooves are welded for the first time, a cold metal transition welding mode is adopted for a rear wire of the double-wire welding, and second-time welding is performed on the welding grooves;and hydrogen removal treatment is carried out on each workpiece. According to the double-wire welding method, the welding efficiency can be improved, and the welding deformation can be reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a double wire welding method. Background technique [0002] EQ70 high-strength steel is a steel widely used in offshore lifting platforms, usually in the form of thick plates. Each EQ70 high-strength steel plate is generally welded by submerged arc welding. [0003] In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: [0004] Since submerged arc welding requires the use of granular flux, the welding needs to be removed after welding, resulting in cumbersome procedures. Moreover, due to the large heat input of submerged arc welding, welding deformation is easy to occur, which has a bad influence on welding accuracy. Contents of the invention [0005] The embodiment of the present invention provides a double-wire welding method, which can improve welding efficiency and reduce welding deformatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/09B23K9/235C21D3/06
CPCB23K9/09B23K9/235C21D3/06
Inventor 方松
Owner WUHAN MARINE MACHINERY PLANT
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