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Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique

A technology of automatic submerged arc welding and groove angle, which is applied in welding equipment, manufacturing tools, arc welding equipment, etc. It can solve the problems of affecting welding efficiency, affecting the quality of welding seam, and narrowing the welding seam at the root, so as to improve welding efficiency. , Improve production efficiency, small welding deformation effect

Inactive Publication Date: 2008-08-13
MCC JINGTANG CONSTR
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AI Technical Summary

Problems solved by technology

Welding if the slag is not cleaned up will cause slag inclusion or "slag rolling", which will affect the quality of the entire weld
The slag removal process is very time-consuming and laborious, especially when the root weld is welded by submerged arc welding, because the root weld is relatively narrow
The slag sticks firmly to the weld and the metal on both sides, making the slag removal work more difficult. During root pass welding, slag removal takes several times the welding time
The time required for welding is wasted on the process of slag removal, which affects the overall welding efficiency

Method used

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  • Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique
  • Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] As shown in Figure 1 and Figure 2, regardless of any weldment 1, a corresponding small-angle groove 2 must be made on the weldment 1 first, and the angle of the groove 2 is 25 +5 0 degree; paired, to ensure that the weld gap is 8 +2 0 mm (that is, the minimum gap of the bottom weld 4); then weld.

[0026] Figure 3 shows an example of a welded box-shaped weldment 8 . After completing the determination of the small-angle groove 2 and the weld gap, perform welding according to the following steps:

[0027] (1) Fully automatic CO 2 Gas shielded welding is used for bottom welding, that is, welding of the bottom weld seam 4: welding is carried out by a trolley-type walking mechanism, which is composed of a welding trolley 6, a welding table tool 7, and a welding torch 9, and the welding torch 9 is CO 2 Welding torch, the gas is argon-rich prote...

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Abstract

The invention relates to a welding technique, especially a combined welding process combining small bevel angle full-automatic CO2 gas shielded protection welding with unionmelt welding, comprising following steps: (1) opening a corresponding small angle bevel on the weldment with a bevel angle of 25+50DEG; (2) paring, ensuring welding space of 8+20mm; (3) grounding welding by using full-automatic CO2 gas shielded protection welding; (4) performing filling in and capping welding by using unionmelt welding. The advantages of the invention are: (1) small bevel angle welding, saving material and improving productivity; (2) grounding welding by using unionmelt welding, the electrical arc heat quantity is centralized, the heated area is small, the welding speed is quick, head affection range is contracted, and welding deformation is small; (3) crackle generation tendency is decreased; (4) bottom slag cleaning is avoided to prepare for narrow gap welding and welding efficiency is increased; (5) filling in and capping are performed by using unionmelt welding, so that welding speed and external appearance forming quality are assured.

Description

technical field [0001] The invention relates to a welding process, especially a fully automatic CO welding process with a small groove angle. 2 Combined welding process of gas shielded welding and submerged arc automatic welding. Background technique [0002] At present, steel structure enterprises adopt 45-degree bevel and 6mm gap seam in the welding process of box shape, especially thick plate welding, and directly use submerged arc automatic welding for welding. Because the groove angle is relatively large, there are many filling materials, which wastes cost and the welding deformation is relatively large. In addition, since the submerged arc welding flux and the welding wire undergo chemical metallurgical reactions at high temperatures and the base metal is fused together, the slag generated by the fusion floats on the surface of the weld, so after each layer of submerged arc welding, slag removal treatment is required. Welding if the slag is not cleaned up will cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K9/16B23K9/18
Inventor 陈宇斌
Owner MCC JINGTANG CONSTR
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