Welding process of union melt welding small divided edge

A submerged arc automatic welding and groove welding technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problem that the cutting surface accuracy is difficult to meet the requirements, affecting the quality and progress of steel components, and the welding deformation of thick plate H steel is large and other problems to achieve the effect of saving welding materials, reducing welding man-hours, and reducing welding deformation

Inactive Publication Date: 2009-04-22
MCC JINGTANG CONSTR
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Problems solved by technology

Due to this kind of groove angle, it is difficult to meet the cutting surface precision when cutting, and because of the large groove angle, the filling amount of welding metal is also large, the welding deformation of thick plate H steel is large, and it is difficult to repair thick plate H steel. , affecting the quality and progress of steel components

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  • Welding process of union melt welding small divided edge
  • Welding process of union melt welding small divided edge

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] The submerged arc automatic welding small groove welding process of the present invention is carried out according to the following steps:

[0018] 1. Make a bevel on the weldment (B) 2. The bevel angle is 35 degrees on one side and 45 degrees on the other side. The 35-degree bevel accounts for 2 / 3-2mm of the plate thickness, and the 45-degree bevel accounts for the plate thickness. 1 / 3-2mm of the plate thickness, leave 2mm blunt edge between 1 / 3 and 2 / 3 of the plate thickness for beveling. The beveling is cut by semi-automatic precision cutting machine or mechanical processing. See the groove diagram figure 1 .

[0019] 2. Do a good job of preheating before butt welding, and use the welding mold 3 shown in Figure 2 according to the requirements of the groove angle.

[0020] 3. Carry out H-group pairing of weldment (A) 1 and weldment (B) 2, a...

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Abstract

The invention relates to a welding process, in particular to an automatic submerged arc welding small groove welding process. The welding process comprises the following steps: a groove is cut on a welding piece, the angle of one side of the groove is 35 degrees, and the angle of other side of the groove is 45 degrees; the H pair group of the welding piece is performed, and the welding piece is fixed by the spot adhibiting method, and the spot adhibiting fixing welding seam is arranged on the 45-degree side of the groove; the welding piece is welded, the 35-degree side of the groove is firstly welded, when one-third of the 35-degree side of the groove is welded, the root part of the 45-degree side of the groove is cleaned, after the cleaning, the welding continues, through the repeatedly staggered welding, the weld pass is completely filled. Compared with the prior art, the welding process has the advantages of reducing the welding time, improving the welding speed of the workpiece, ensuring the scheduling requirements on a project, reducing the filler level of weld metal, saving one-third of welding materials, directly improving actual economic benefits and reducing the welding deformation; moreover, because the angle of the groove is reduced, the welding process also has the advantages of reducing the pre-heating width of the welding seam, lowering the defect of the welding seam and lowering the repair cost.

Description

Technical field: [0001] The invention relates to a welding process, in particular to a submerged arc automatic welding small groove welding process. Background technique: [0002] In the production process of all steel structure manufacturing enterprises, the angle and form of the full penetration welded groove of thick plate welded H steel generally adopt the code named SC-TK-2 in the "Technical Regulations for Welding of Building Steel Structures (JGJ81-2002)". Groove form. Due to this kind of groove angle, it is difficult to meet the cutting surface precision when cutting, and because of the large groove angle, the filling amount of welding metal is also large, the welding deformation of thick plate H steel is large, and it is difficult to repair thick plate H steel. , affecting the quality and progress of steel components. Invention content: [0003] The present invention aims to solve the above-mentioned technical defects existing in the existing small groove weldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18B23K9/235
Inventor 卢小军
Owner MCC JINGTANG CONSTR
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