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Abutting welding method for box columns of large-scale factory building

A welding method and box-shaped column technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems affecting the quality of box-shaped column welds and the construction period of structural installation, large butt joint section size, uneven heating of welds, etc. , to achieve the effect of shortening the installation time of butt welding, small welding stress and uniform heating

Active Publication Date: 2015-02-04
CHINA MCC17 GRP
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Problems solved by technology

[0002] In the process of steel structure construction, it is often encountered that the columns of super-large steelmaking high-span workshops adopt the method of butt joint installation interface. Since the workshop column is designed as a medium-thick box-type structure, the size of the butt joint section is large, and the steel column is installed. During butt welding, due to the influence of welding process, welding speed, environment and other factors, uneven heating of the weld seam and excessive welding stress will cause welding defects such as cracks, pores, slag inclusions, and incomplete penetration, resulting in weld seam rework and affecting The quality of the weld seam and the construction period of the structural installation of the box column

Method used

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  • Abutting welding method for box columns of large-scale factory building
  • Abutting welding method for box columns of large-scale factory building

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Embodiment Construction

[0014] Referring to the accompanying drawings, a butt welding method for box-shaped columns of a large factory building, its specific technical scheme is:

[0015] A. Preparation before welding: install the positioning plate of the box-shaped column, install the box-shaped column: minimize the amount of misalignment when aligning butt joints, and the amount of misalignment should be controlled below 2.0mm. -2.0mm, the gap is required to be 1.0-3.0mm and the gap plate is installed, and the verticality and elevation are adjusted; after adjustment, the positioning plate of the box column is fastened to control the shrinkage of the weld seam, reduce the welding deformation, and take windproof measures;

[0016] B. Preheating before welding: Before welding, clean the rust, oil stains and polish within 10-20mm of the welded joint and the groove, and then preheat the base metal with an oxyacetylene flame. The preheating temperature is 100- 150°C, the preheating width is within 100mm ...

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Abstract

The invention discloses an abutting welding method for box columns of a large-scale factory building. The invention adopts the following specific technical scheme that the abutting welding method comprises the steps: A, preparation before welding; B, preheating before welding; C, welding; D, thermal insulation after welding. According to the abutting welding method for the box columns of the large-scale factory building, which is disclosed by the invention, a welding seam is uniformly heated; a welding stress is small; the welding defects such as cracks, pores, slag inclusion, incomplete penetration and the like are effectively avoided; abutting welding mounting time of the box columns of the steel-making factory building is shortened; safety, reliability and high working efficiency are realized; operability is strong and construction cost is reduced.

Description

technical field [0001] The invention relates to a structural welding method, in particular to a butt welding method for large box-shaped columns. Background technique [0002] In the process of steel structure construction, it is often encountered that the columns of super-large steelmaking high-span workshops adopt the method of butt joint installation interface. Since the workshop column is designed as a medium-thick box-type structure, the size of the butt joint section is large, and the steel column is installed. During butt welding, due to the influence of welding process, welding speed, environment and other factors, uneven heating of the weld seam and excessive welding stress will cause welding defects such as cracks, pores, slag inclusions, and incomplete penetration, resulting in weld seam rework and affecting The quality of the weld seam and the construction period of the structural installation of the box column are improved. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
CPCB23K9/02B23K9/16B23K9/235
Inventor 房政
Owner CHINA MCC17 GRP
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