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Automatic Welding Method for Large Diameter Pipe

A large-diameter pipe, automatic welding technology, used in welding equipment, tubular objects, arc welding equipment, etc., can solve the problem that large-diameter pipe welding process cannot guarantee welding quality, etc., to avoid large vibration, ensure welding quality, and ensure consistency sexual effect

Active Publication Date: 2018-12-28
CHINA NUCLEAR IND 22ND CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the object of the present invention is to provide an automatic welding method for large-diameter pipes, aiming at solving the technical problem that the welding process of existing large-diameter pipes cannot guarantee the welding quality

Method used

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  • Automatic Welding Method for Large Diameter Pipe
  • Automatic Welding Method for Large Diameter Pipe
  • Automatic Welding Method for Large Diameter Pipe

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0028] like figure 1 As shown, the large-diameter pipe automatic welding method provided in this embodiment includes the following steps:

[0029] Step S1, aligning the large-diameter pipe, and fixing it with clamping dies at the position of the welding port.

[0030] In this step, the large-diameter pipe is first matched, and then the welding joint is fixed by clamping mold at the position of the welding joint. However, plugs must be used at positions where the clampi...

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Abstract

The invention belongs to the technical field of welding and provides an automatic welding method for a large-diameter pipe. The automatic welding method comprises the steps that the large-diameter pipe is aligned to an opening and is fixed with a clamping die at the position of the welding opening; argon is injected into the pipe for protection; the position of the welding opening is subjected to continuous argon arc welding; and cooling is conducted firstly after finishing welding, then high-temperature tempering heat treatment is conducted, a function of the moving speed with time of a welding gun is arranged, finally the welding gun is fixed in a fixed distance L0, and automatic welding is controlled. Stability of the welding gun is kept in the whole process, and welding efficiency and the consistency of a welding seam are improved.

Description

technical field [0001] The invention belongs to the technical field of steel pipe welding, and in particular relates to an automatic welding method for large-diameter pipes. Background technique [0002] Large-diameter pipes are widely used, and are used in reheating hot section pipes, superheater pipes, and main steam pipes in thermal power plants at home and abroad. At present, in thermal power construction welding, large-diameter pipes are usually welded by hand. Manual welding has high requirements for welders’ operation skills. Human factors such as insufficient number of real-time welders, insufficient welder technical strength, and insufficient work experience of welders will directly affect large-scale production. Caliber pipe welding quality, thus affecting the quality and safety of the entire project and other issues. Contents of the invention [0003] In view of the above problems, the object of the present invention is to provide an automatic welding method fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/095B23K9/235B23K9/167B23K101/06
CPCB23K9/095B23K9/16B23K9/167B23K9/235B23K2101/06
Inventor 徐俊华欧阳姣凤孙建平李大为焦进垒朱大志
Owner CHINA NUCLEAR IND 22ND CONSTR