Multi-electrode single-side submerged arc welding method

A submerged arc welding and multi-electrode technology, which is applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problem that the stress relief operation takes a lot of time, etc., and achieve the improvement of welding workability, excellent welding quality, and suppression of angular deformation Effect

Active Publication Date: 2015-09-30
KOBE STEEL LTD +1
View PDF13 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even when such a lead plate is used, it takes a lot of time to relieve the stress due to the corner deformation after welding.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-electrode single-side submerged arc welding method
  • Multi-electrode single-side submerged arc welding method
  • Multi-electrode single-side submerged arc welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0151] Hereinafter, the effects of Examples falling within the scope of the present invention will be described in comparison with Comparative Examples deviating from the scope of the present invention.

[0152] The two steel plates with the inclined surfaces formed on the end surfaces were butted so that the end surfaces faced each other, and a Y-shaped bevel was formed. The groove angle of the Y-shaped groove is 50°, the depth of the groove is 17mm, and the root gap is 0mm. In addition, the length of the steel plate is 20m, the thickness of the steel plate is 20mm, and the steel plate is DH36 steel plate certified by the marine class. This steel plate was welded.

[0153] In this example, a welding device equipped with four electrodes was used. And, the conditions of the actual welding are set as the conditions shown in Table 1, the welding conditions of the welding start position and the joint start end are set as the conditions shown in Table 2, and the welding condition...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides a multi-electrode single-side submerged arc welding method exhibiting excellent welding operationality and welding quality. By employing the method, welded metal can be prevented from cracking at a tail end portion of a joint, and angular deformation after the welding is prevented. The multi-electrode single-side submerged arc welding method is used for a welding steel plate, wherein the steel plate is provided with guiding boards and is subjected to interrupted or continuous in-plane positioned welding before the arc welding. The method is characterized in that an area, from the position above the tail end by more than 1000mm to the tail end, of the steel plate is welded with the welding speed being lower than 70% of the formal welding speed, and the welding is carried out based on a condition that Q/ Q'=0.60-1.30, wherein the total heat absorption capacity of the formal welding is Q(kJ/mm), and the total heat absorption capacity of the welding with the welding speed being lower than 70% of the formal welding speed is Q'(kJ/mm).

Description

technical field [0001] The invention relates to a multi-electrode single-sided submerged arc welding method for welding steel plates. Background technique [0002] Multi-electrode single-sided submerged arc welding is an efficient welding construction method that is applied to a wide range of areas centering on shipbuilding as plate joint welding. In plate joint welding using the multi-electrode single-sided submerged arc welding method, welding is basically performed under the same welding construction conditions from the start of welding to the end of welding. In addition, although welding conditions may be changed due to gaps, poor groove accuracy, etc., this is an adjustment with the main purpose of improving welding quality and bead shape, and welding conditions will not be changed significantly. [0003] Here, in multi-electrode single-sided submerged arc welding, there is a problem that weld metal cracks (longitudinal cracks) tend to occur at the joint start end and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18
CPCB23K9/18
Inventor 幸村正晴杉山大辅佐佐木誉史柴原正和生岛一树
Owner KOBE STEEL LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap