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Welding method of steel bars

A welding method and technology for bar welding, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of low production efficiency and unstable welding quality, and achieve the effect of improving production efficiency and increasing welding speed.

Active Publication Date: 2016-04-27
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Welding of steel bar by using electrode arc welding welding method, due to the characteristics of this welding method, it has the disadvantages of low production efficiency and unstable welding quality

Method used

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  • Welding method of steel bars

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Embodiment Construction

[0015] To sum up, the present invention discloses a method for welding steel bars, comprising the following steps:

[0016] The first step: the steel bars are paired, the ends of the steel bars to be welded are in contact with each other, and the side bars are placed on both sides of the steel bars to be welded;

[0017] The second step: positioning welding, pre-weld four positioning welding sections between the two steel bars to be welded and the two side bars, and connect the steel bars to be welded and the side bars; the four positioning welding sections formed during the positioning welding process are located on the same side , and the length of the tack welding section is 10-20mm

[0018] The third step: fixed welding, using flux-cored carbon dioxide gas shielded welding to weld two steel bars and side bars to be welded on both sides; the fixed welding step first welds the side without the positioning welding section, and secondly welds the side with the positioning weld...

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Abstract

The invention discloses a welding method of steel reinforcement strip welding. The welding method is characterized by comprising the following steps: 1, fitting up steel reinforcements, namely relatively contacting the end parts of the steel reinforcements to be welded, and placing strips on the two sides of each of the steel reinforcements to be welded; 2, carrying out positioned welding, namely pre-welding four positioned welding sections between the two steel reinforcements to be welded and the two strips, and connecting the steel reinforcements to be welded with the strips; and 3, carrying out fixed welding, namely welding the two steel reinforcements to be welded and the strips on the double surfaces by adopting flux-cored carbon dioxide arc welding. The method has the advantages as follows: a higher arc voltage is selected by utilizing a welding current and arc voltage ratio formula to guarantee sufficient heat for melting of welding wires and the steel reinforcements; the capabilities of a welding seam in resistance to dirt such as rust and resistance to a pore defect are improved by utilizing titanium calcium type slag formed after melting of powder in a flux-cored wire; and the welding speed is accelerated while necessary heat is guaranteed to enable the titanium calcium type slag in the welding wire to fully take part in metallurgical reaction, namely the production efficiency is improved by 2-3 times.

Description

technical field [0001] The invention relates to a welding method, in particular to a welding method for reinforcing bars. Background technique [0002] At present, the existing steel bar welding in my country mainly uses the electrode arc welding welding method for connection, and a small amount of solid wire CO2 semi-automatic gas shielded welding welding method has also appeared in recent years. The use of arc welding welding method for steel bar welding has the disadvantages of low production efficiency and unstable welding quality due to the characteristics of the welding method itself. The solid core wire CO2 semi-automatic gas shielded welding itself belongs to the low-hydrogen type welding method. Before welding, the steel surface is required to be clean and free of dirt, but there are rust and other dirt on the surface of the steel bar during on-site welding, so it is inevitable to use this method to weld the steel bar. Stomach defects affect welding quality. For de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16
Inventor 王迎军张大刚何生贵焦荣格苏召王秉洪
Owner STATE GRID CORP OF CHINA
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