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Novel copper-plating-free thick wire automatic welding technology for building steel structure

A technology of non-copper-coated thick wire and construction steel, which is applied in the direction of welding medium, welding accessories, welding equipment, etc., can solve the problems that affect the quality of welded joints, the health of welders, the difficulty of removing slag in the first layer, and increase the cost, etc., to achieve Not easy to block the contact tip, less man-hours for cleaning and calibration, and stable wire feeding

Inactive Publication Date: 2015-12-16
CHANGJIANG & JINGGONG STEEL STRUCTURE GRP CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing just enough welding process, butt full penetration welds of thick plates and fillet joints (box members, T-shaped welds) full penetration welds are welds with the largest welding workload and the highest technical requirements. Submerged arc welding (SAW) technology is very difficult to remove slag in the first layer, so CO2 gas shielded welding (GMAW) (wire diameter is 1.2mm) is often used for bottoming and submerged arc welding (SAW) cover, which affects the improvement of efficiency ;In order to achieve the purpose of full penetration and no defects in the weld, in the plate butt joint and T-weld, a large number of carbon arc gas root cleaning technology is used, which not only increases the cost, but also affects the quality of the welded joint and the health of the welder

Method used

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  • Novel copper-plating-free thick wire automatic welding technology for building steel structure
  • Novel copper-plating-free thick wire automatic welding technology for building steel structure
  • Novel copper-plating-free thick wire automatic welding technology for building steel structure

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Embodiment Construction

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below.

[0034] The new copper-plated thick wire automatic welding technology for building steel structures in the welding work of building steel structures provided by the present invention is characterized in that it includes the following methods:

[0035] 1) Groove cleaning

[0036] Before welding, within 30-50mm of the welding groove and both sides of the base metal, the gas-cut scale, slag, rust, oil, paint, dust, and moisture must be completely removed before welding. Impurities that affect the welding quality;

[0037] 2) Preheating, temperature control between layers

[0038] The thickness of carbon structural steel Q235 is greater than 40mm, and the thickness of low-alloy high-strength structural steel Q345 is greater than 25mm;

[0039] When the temperature of the operating site is lower ...

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Abstract

The invention discloses a novel copper-plating-free thick wire automatic welding technology for a building steel structure. In manufacturing and welding work of the building steel structure, quality and cost of a steel structural solid are affected by key processes, namely welding quality and welding efficiency of a thick plate and a long welding seam; and a butt-joint full-penetration welding seam and an angle-joint full-penetration welding seam of the thick plate are welding seams with greatest welding workload and highest technical requirements; a full automatic butt-joint process with without back chipping is adopted; and full-automatic angle joint without back chipping is realized. The novel copper-plating-free thick wire automatic welding technology is low in welding cost, good in quality and is an environment-friendly and energy-saving effective measure.

Description

technical field [0001] The present invention is used for butt joint full penetration welds of thick plates in building steel structures, fillet joints (box-shaped components, T-shaped welds) full penetration welds are welds with the largest welding workload and the highest technical requirements; the welding cost is low , good quality, is an effective measure of environmental protection and energy saving. Background technique [0002] In the existing just enough welding process, butt full penetration welds of thick plates and fillet joints (box members, T-shaped welds) full penetration welds are welds with the largest welding workload and the highest technical requirements. Submerged arc welding (SAW) technology is very difficult to remove slag in the first layer, so CO2 gas shielded welding (GMAW) (wire diameter is 1.2mm) is often used for bottoming and submerged arc welding (SAW) cover, which affects the improvement of efficiency ;In order to achieve the purpose of full p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/235B23K35/40B23K9/32B23K101/18B23K103/04
CPCB23K9/0026B23K9/02B23K9/235B23K9/32B23K35/0261B23K35/40
Inventor 贾宝华张飞童林浪夏华魏中华
Owner CHANGJIANG & JINGGONG STEEL STRUCTURE GRP CO LTD
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