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Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method

An automatic welding and all-position technology, which is applied in the direction of welding medium, manufacturing tools, welding equipment, etc., can solve the problems of long welding cycle, large filling amount of welding deposited metal, wide groove, etc., and achieve short welding cycle and high welding efficiency High, low fill effect

Active Publication Date: 2009-01-14
CHINA NUCLEAR IND 23 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. The groove of the argon-electric combined welding process is wide, the filling amount of welding deposited metal is large, and the welding cycle is relatively long

Method used

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  • Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method
  • Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method
  • Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0030] For all-position automatic welding of narrow gaps in large-diameter thick-walled pipes with a wall thickness h above 40mm, the present invention is based on the traditional argon-electric combined welding process for welding the bevel of large thick-walled pipes, through repeated tests and improvements, The groove type and size suitable for the narrow gap automatic welding process of large thick-walled pipes have been obtained, such as image 3 shown by figure 1 Compared with the grooves of large thick-walled pipes welded by the traditional argon-electric combined welding process shown, the width of the grooves proposed by the present invention is obviously narrowed, and the maximum width of the grooves is reduced to 18-24mm, while the structure of the grooves The shape also changed significantly.

[0031] Figure 4 A schematic dia...

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Abstract

The present invention relates to inert gas protected automatic narrow gap tungsten electrode welding process for large thick pipe with diameter over 325 mm and thickness over 40 mm. The automatic welding process includes forming combining chamfer in the opposite ends to be welded before welding, bottoming welding, single layer filling welding, and covering welding in linear or swinging weld pass. The process has less filled deposited metal, low welding cost, high welding efficiency and other advantages.

Description

technical field [0001] The invention relates to an all-position automatic welding method for a large thick-walled pipeline, in particular to an all-position automatic welding method using inert gas protection such as a narrow gap tungsten electrode for a large thick-walled pipeline. The invention also relates to pipes manufactured by the all-position automatic welding method for thick-walled pipes. Background technique [0002] At present, there are mainly TIG gas-shielded welding process and MIG gas-shielded welding process at home and abroad, and these two processes are mainly used for welding small-diameter thin-walled pipes (pipe diameter φ<325mm, pipe wall thickness h Welding <40mm. For large thick-walled pipes (pipe diameter φ≥325mm, pipe wall thickness h≥40mm) welding usually adopts the process of manual argon arc welding for priming and electrode arc filling and covering (hereinafter referred to as argon arc welding) Combined welding process), the groove type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K33/00B23K9/095B23K35/38B23K101/06
Inventor 范群喜徐建魁韩乃山苑占波张伟栋董玉川唐识
Owner CHINA NUCLEAR IND 23 CONSTR
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