Hot wire tig welding method for pipe butt joint
A welding method and pipeline technology, applied in welding equipment, tubular objects, arc welding equipment, etc., can solve the problems of narrow application range and small application range, and achieve the effect of high-quality welding quality
Active Publication Date: 2016-02-03
HUAHENG WELDING
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Problems solved by technology
However, compared with traditional TIG welding, this welding method only increases the welding wire deposition rate by 2-3 times; this welding method has a small scope of application and is only suitable for welding low-alloy steel materials; the underlying layer still uses the traditional TIG cold wire welding process , the efficiency still has room for improvement; this welding method is only suitable for U-shaped groove welding, and its application range is narrow
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[0029] Please refer to figure 1 As shown, the present invention discloses a pipeline butt butt hot wire TIG welding method, which includes the following steps:
[0030] S1: pre-welding preparation stage, the step S1 includes the following sub-steps:
[0031] S11: Groove processing, process the pipe end groove of the pipe to be welded into V-shaped, U-shaped or double-V composite type according to the process requirements;
[0032] S12: Grinding and cleaning the groove of the above-mentioned pipe end and both sides of the inner and outer walls until the metallic luster is exposed and the oil and rust are removed;
[0033] S13: spot-weld the grooves of the pipe ends of the two pipes to be welded to form butt welds, and spot-weld a section of welds about 10-20mm in length every 120°;
[0034] S14: Clamp the spot-welded pipe to be welded on the rotary welding tool;
[0035] S2: The stage of welding process input and welding program call, where the parameters of the welding proc...
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Abstract
The invention discloses a pipeline butt joint hot wire TIG welding method. The method includes the stage of preparation before welding and the stage of welding process input and welding program calling. The stage of preparation before welding includes the following sub-steps that pipe end notches of pipelines to be welded are machined to be in the shape of V or U or double-V according to process requirements; the pipe end notches and two sides of inner and outer walls of the pipe end notches are subjected to polishing and cleaning until metallic luster is exposed, and oil and rust removing is carried out; the pipe end notches of the two pipelines to be welded are subjected to tack welding to form a butt joint welding seam; the pipelines, having been subjected to tack welding, to be welded are clamped on a rotating welding tool. Due to the adoption of the pipeline butt joint hot wire TIG welding method, perfect welding quality can be achieved and is more stable compared with that of traditional TIG welding, welding efficiency can be improved by 5-10 times, MIG deposition efficiency can be completely achieved, and both welding quality and welding efficiency are guaranteed; the pipeline butt joint hot wire TIG welding method can be popularized and applied to the field of pipeline prefabrication.
Description
technical field [0001] The invention relates to a pipeline butt joint hot wire TIG welding method, in particular to a high-efficiency hot wire TIG automatic welding process for carbon steel and stainless steel pipelines, belonging to the technical field of welding automatic control. Background technique [0002] The traditional pipeline welding method adopts manual TIG welding for bottoming, automatic or manual TIG welding for filling or MIG welding for filling and covering. However, the efficiency of manual TIG welding bottoming is low, and automatic or manual TIG welding filling or MIG welding filling cover cannot satisfy many high-quality occasions. Therefore, a welding method that can satisfy the quality of TIG welding and the efficiency of MIG welding has always been the direction of development in the field of pipeline prefabrication. Although the traditional hot wire TIG welding process can be 2-3 times the efficiency of traditional cold wire TIG welding, But its eff...
Claims
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IPC IPC(8): B23K9/167B23K9/235B23K33/00
CPCB23K9/0282B23K9/167B23K9/235B23K33/00B23K2101/06B23K2103/04B23K2103/12
Inventor 汪忠李纪龙李正东
Owner HUAHENG WELDING