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Groove butt welding structure and welding method thereof

A welding method and welding structure technology, which is applied to welding equipment, arc welding equipment, and the edge of workpieces, can solve problems such as incomplete cleaning, welding defects, and time-consuming problems, so as to reduce non-destructive inspection and improve production efficiency. The effect of shortening the manufacturing cycle

Inactive Publication Date: 2015-07-08
SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the root cleaning process and non-destructive testing take a lot of time, even incomplete root cleaning may lead to welding defects

Method used

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  • Groove butt welding structure and welding method thereof
  • Groove butt welding structure and welding method thereof
  • Groove butt welding structure and welding method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, it is the first embodiment of the groove butt welding method. This welding method is applicable between two low-alloy steel shells, and specifically includes the following steps:

[0042] Step 1.1: Set a first groove 101 on the inner wall 108 of the annular seam of the low-alloy steel shell, and set a second groove 102 on the outer wall 109 . The first groove 101 and the second groove 102 are arranged correspondingly, and the axial connection line between the first groove 101 and the second groove 102 is perpendicular to the surface of the low alloy steel shell. In the first embodiment, the first groove 101 and the second groove 102 adopt double-sided U-shaped grooves, wherein the depth of the second groove 102 is greater than the depth of the first groove 101 .

[0043] Step 1.2. After the two low-alloy steel shells are butted, firstly, in the first groove 101 located on the inner side wall, use the first welding rod with a small diameter to...

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Abstract

The invention provides a groove butt welding method. The welding method comprises the following steps: forming a first groove and a second groove in inner and outer sides of a butt welding part respectively; completely penetrating the bottom center of the first groove and welding to form a first welding channel, and then filling up the whole first groove; welding on the bottom center of the second groove to form a second welding path, and then filling up the whole second groove. According to the groove butt welding method disclosed by the invention, the welding of the whole butt welding seam is completed through improved welding material dimension, welding parameters, welding sequence and the like, so that the welding quality of the butt welding seam is guaranteed, the non-destructive examination process, the visual examination process and the dimension examination process after middle clearing and clearing are reduced, the production and manufacturing period is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a welding technology applied in the field of nuclear power or chemical industry, in particular to a groove butt welding structure and a welding method. Background technique [0002] In the field of nuclear power equipment and chemical containers, the general low-alloy steel shell and the shell are welded by manual arc welding on the inner wall, and the welding process of submerged arc automatic welding after cleaning the outer wall; The weld seam welding adopts the welding process of double-sided submerged arc automatic welding. After one side is welded, the other side is cleaned and then welded. These butt seam welding processes require a root cleaning step, that is, the blunt edge and root bead need to be removed, and after root cleaning, magnetic particle inspection in non-destructive testing is required to ensure thorough root cleaning, followed by visual inspection and dimensional inspection. examine. Since the root clea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23K9/028B23K9/18
CPCB23K33/004B23K9/028B23K9/0282B23K9/18
Inventor 李双燕徐超张茂龙
Owner SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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