Submerged-arc welding process method for welding H-shaped steel with web plate more than 16mm thick

A process method, H-beam technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as environmental pollution, channel carbonization, component scrapping, etc., to reduce environmental pollution, small contact area, and labor saving Effect

Active Publication Date: 2013-03-06
SHANDONG ZHONGTONG STEEL STRUCTURE ENG
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Problems solved by technology

[0002] The traditional welding process of full penetration submerged arc welding of H-shaped steel requires that when the web thickness is greater than 16mm and full penetration is required, the back of the weld must be cleaned. Carbon arc gouging is a common method in the steel structure industry. The production efficiency of this method is about 4 times higher than that of the air shovel, especially when it is welded in all positions, it has greater advantages and relatively reduces the processing cost of the workpiece. When removing defects at the root of the weld, the surface is smoot

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  • Submerged-arc welding process method for welding H-shaped steel with web plate more than 16mm thick
  • Submerged-arc welding process method for welding H-shaped steel with web plate more than 16mm thick
  • Submerged-arc welding process method for welding H-shaped steel with web plate more than 16mm thick

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Embodiment Construction

[0021] The invention will be described in detail below in conjunction with the accompanying drawings and embodiments. In this embodiment, the thickness of the H-shaped steel web is 28mm, the specification is H1000*250*28*28mm, the material of the base material is Q345B, and full penetration welding is required. The process method includes the following steps:

[0022] 1) Selection of welding materials: According to the nature of the base metal, the diameter of the welding wire is 4mm, the flux is Xilin HJ101, and the particle size is 10-40 mesh;

[0023] 2) Processing of web groove: process web groove, the groove form is K-type symmetrical groove, the K-type symmetrical groove angle is 60±2°, and the blunt edge is 1-2mm;

[0024] 3) Assembly of H-shaped steel: assemble the web and the flange together, and form a zero-pair gap after the assembly is completed; the zero-pair gap means that the web and the flange are first corrected before assembly, Ensure that the local flatness...

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Abstract

The invention relates to the technical field of welding of H-shaped steel and particularly relates to a back-chipping-free full-penetration submerged-arc welding process method for welding H-shaped steel with a web plate more than 16mm thick. The process method comprises the steps of material selection, edge preparation, assemblage of the H-shaped steel, positioned welding, preparation before welding, welding and the like, wherein the assemblage is required to be zero assembling, and an assembling interval is less than or equal to 0.5mm; the angles of K-shaped symmetrical beveled edges are designed to be at 60+/-2 degrees, and the truncated edges of the beveled edges range from 1mm to 2mm; and the standard lengths of copper cushion blocks are designed to be 530mm and 130mm. The submerged-arc welding process method has the advantages of low cost, high efficiency, labor saving, reduction in environmental pollution and the like; and according to primary measurement and calculation, the welding process method can reduce the cost for welding the H-shaped steel with the web plate more than 16mm thick by 25%.

Description

technical field [0001] The invention relates to the technical field of H-shaped steel welding, in particular to a root-clearing-free full-penetration submerged arc welding process used for welding H-shaped steel with a web thickness greater than 16 mm. Background technique [0002] The traditional welding process of full penetration submerged arc welding of H-shaped steel requires that when the web thickness is greater than 16mm and full penetration is required, the back of the weld must be cleaned. Carbon arc gouging is a common method in the steel structure industry. The production efficiency of this method is about 4 times higher than that of the air shovel, especially when it is welded in all positions, it has greater advantages and relatively reduces the processing cost of the workpiece. When removing defects at the root of the weld, the surface is smooth and clean, but there are also the following disadvantages: 1) It is easy to add carbon to the channel, and the large...

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Application Information

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IPC IPC(8): B23K9/18B23K9/235B23K33/00
Inventor 曲铁勇陈蒙员建成胡树青解西秋寻知磊姜明珠
Owner SHANDONG ZHONGTONG STEEL STRUCTURE ENG
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