Method for welding heavy-duty trough-type steel

A welding method and channel-shaped steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as bending and torsion deformation, increased flame correction costs, and low production efficiency

Active Publication Date: 2011-11-23
ANHUI WEIHONG STEEL STRUCTURE GRP
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Problems solved by technology

However, during the welding process, the components will shrink longitudinally and laterally to cause bending and torsion deformation, which will produce waste products. After welding, flame correction is required, which increases the cost of post-weld flame correction, and the production efficiency is not high.

Method used

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  • Method for welding heavy-duty trough-type steel
  • Method for welding heavy-duty trough-type steel
  • Method for welding heavy-duty trough-type steel

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Experimental program
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Embodiment Construction

[0014] See attached figure 1 , 2 , 3 shown.

[0015] In order to prevent angular deformation, the specific welding sequence is as follows: ①Adopt rigid fixing method; fix the supports (4) in the groove respectively on the inner side of the shaped steel wing plate (6). The purpose is to prevent the inner and outer corner deformation that may be produced by the steel during the welding process.

[0016] Carry out root welding: The welding method adopts carbon dioxide gas shielded welding that produces the least welding deformation.

[0017] Perform cover welding: In order to improve the appearance quality of the weld, double wire submerged arc welding is selected for cover welding. Due to the large amount of submerged arc welding welding deformation, the weld seam shrinks longitudinally during the welding process, resulting in deflection deformation of the component. In order to prevent the occurrence of flexural deformation, the anti-deformation method was chosen. The spec...

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Abstract

The invention relates to a method for welding heavy-duty trough-type steel. A trough inner support is respectively connected with the inner side of a trough-shaped steel wing plate in a tack welding manner, backing welding is carried out between the trough inner support and the trough-shaped steel wing plate by adopting a carbon dioxide gas arc welding manner which produces minimum welding deformation, and then cosmetic welding is carried out. By adopting the method provided by the invention, torsion deformation caused by longitudinal contraction and transverse contraction of a construction member which can appear in a heavy-duty trough-type steel structure making and welding process can be prevented, and waste products can be avoided. The postwelding flame correction cost is reduced, andthe production efficiency is improved.

Description

technical field [0001] The invention relates to a welding method for a section steel component. Background technique [0002] [Channel steel has a cross-section of 1m x 0.5m x 22m, a thickness of 40mm, and a weight of about 13 tons. It cannot be processed by mechanical pressing, but can only be processed by welding. However, during the welding process, the components will shrink longitudinally and laterally to cause bending and torsion deformation, which will produce waste products. After welding, flame correction is required, which increases the cost of post-weld flame correction, and the production efficiency is not high. Contents of the invention [0003] The present invention aims at the deficiencies of the prior art, and provides a method to prevent the bending and torsion deformation caused by the longitudinal and transverse shrinkage of the components that will occur during the manufacture and welding of heavy-duty [shaped steel structures], thus resulting in waste ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/18
Inventor 曹雁冰
Owner ANHUI WEIHONG STEEL STRUCTURE GRP
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