Carbon dioxide automatic full position welding method for small bore pipes

An automatic welding and carbon dioxide technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as low welding efficiency and affecting welding quality, and achieve high pass rate, improved welding quality, and stable welding quality.

Active Publication Date: 2012-03-14
CHINA MCC5 GROUP CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) Manual welding and discontinuity of operation process (change of welding position, replacement of welding rod, interrupted arc welding, slag removal, etc.), determines the low welding efficiency;
[0004] 2) Personal welding operation techniques and emotions directly affect welding quality

Method used

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  • Carbon dioxide automatic full position welding method for small bore pipes
  • Carbon dioxide automatic full position welding method for small bore pipes

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Embodiment Construction

[0045] The present invention is mainly aimed at the automatic welding of pipelines below DN500. During the welding process of small-diameter pipelines, it is necessary to realize 360° (full position) CO welding of pipelines. 2 Gas shielded automatic welding is quite difficult.

[0046] A kind of carbon dioxide all-position automatic welding method of small diameter pipeline, it comprises an automatic welding machine, and this method comprises the following steps:

[0047] Welding groove preparation steps: automatic welding The welding groove is processed by mechanical method; when the pipe wall thickness is less than 28mm, the "V" groove is used; when the pipe wall thickness is greater than 28mm, the welding groove adopts the opening with the depth increasing jumping form (see figure 1 );

[0048] Pipeline assembly and spot-fixing steps: manual tungsten argon arc welding is used to spot-fix the pipeline, and the spot-fixing gap is 2.5-3mm;

[0049] Pipeline back cover weldi...

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Abstract

The invention relates to an automatic welding method for small bore pipes, in particular to a carbon dioxide automatic full position welding method for the small bore pipes, which comprises an automatic welding machine and the following steps: 1, preparing a welding groove, wherein the welding groove for the automatic welding is processed by a mechanical method; 2, assembling the pipes and performing tacking, wherein manual tungsten electrode argon arc welding is adopted for pipe tacking; 3, performing back sealing welding on the pipes, wherein the manual tungsten electrode argon arc welding is adopted for the back sealing welding of the pipes; 4, setting welding standards of the automatic welding machine, wherein each pipe is divided into 12 areas according to a clock, and then standard setting is performed; 5, mounting the welding head of the welding machine; and 6, welding by automatic welding, wherein teaching is performed before welding, geometrical errors caused by pipe preparation, machining, welding deformation and assembly are avoided, and a method for welding a circle clockwise and then welding a circle anticlockwise is adopted for welding in the multi-layer multi-pass welding. The method adopts welding processes of TIC back sealing welding and CO2 automatic welding to realize the automatic full position welding of the small bore pipes.

Description

technical field [0001] The invention relates to automatic welding of pipelines, in particular to an automatic welding method for small-diameter pipelines. Background technique [0002] In the welding of small-diameter pipes, manual argon tungsten arc welding or manual electrode arc welding is traditionally used. The welding efficiency is low, and the welding quality fluctuates due to the influence of human or external factors. The reason is that: [0003] 1) Manual welding and discontinuity of operation process (change of welding position, replacement of welding rod, interrupted arc welding, slag removal, etc.), determines the low welding efficiency; [0004] 2) Personal welding operation techniques and emotions directly affect welding quality. Contents of the invention [0005] The invention solves the above-mentioned defects of the prior art, and provides a carbon dioxide automatic welding method for small-diameter pipelines. The present invention adopts TIG (bottom s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/095
Inventor 任江
Owner CHINA MCC5 GROUP CORP
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