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Arc welding method and apparatus for arc welding

An arc welding and welding direction technology, applied in arc welding methods and in the field of arc welding, to achieve the effect of eliminating harmful effects, easy access, and high accuracy

Active Publication Date: 2012-01-18
ESAB AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To a small extent, this effect can be mitigated by sequentially reducing the welding current used to power subsequent electrodes, although the problem cannot be completely avoided by this measure

Method used

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  • Arc welding method and apparatus for arc welding
  • Arc welding method and apparatus for arc welding
  • Arc welding method and apparatus for arc welding

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Embodiment Construction

[0044] In the drawings, the same or similar elements are denoted by the same reference numerals. The drawings are merely schematic representations, not intended to portray specific parameters of the invention. Moreover, the drawings are intended to depict only typical embodiments of the invention, and therefore should not be considered as limiting the scope of the invention.

[0045] figure 1 A welding arrangement for submerged arc welding is schematically depicted, including an electrode assembly 100 for welding a workpiece 10 . In the exemplary embodiment, electrode assembly 100 includes three electrodes 110 , 112 , 114 each held in weld head jaws 140 , 142 , 144 . Welding electrodes 110, 112, 114 are aligned to a weld seam (not shown) in sequential order and are equally spaced apart.

[0046] Similar to MIG welding, submerged arc welding (SAW) involves forming an arc between a continuous supply of bare wire electrodes 110 , 112 , 114 and workpiece 10 while electrode asse...

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Abstract

The invention relates to a an electric arc welding method, wherein an electrode assembly (100) comprises at least two fusible continuous electrodes (110, 112, 114, 116, 118) acting on a workpiece (10) for generating a weld pool (12) via electric arcs, wherein the at least two electrodes (110, 112, 114, 116, 118) are arranged in sequential order relative to a welding direction (30) and laterally separated relative to each other, wherein steps are performed of monitoring at least one stability parameter (Stab_par) for each electrode (110, 112, 114, 116, 118) of the electrode assembly (100); determining if one electrode (116) of the electrode assembly (100) violates a stability criterion (Crit); separating at least temporarily the one electrode (116) violating the stability criterion (Crit) from one or more adjacent electrodes (110, 112, 114, 118) when a violation of the stability criterion (Crit) of the one electrode (116) is detected.

Description

technical field [0001] The invention relates to an arc welding method and an apparatus for arc welding, in particular for submerged arc welding, comprising an electrode assembly with a plurality of electrodes. Background technique [0002] Immersion arc welding is a fully mechanized welding method with high productivity and quality, which is usually used for longer welds in thicker materials. During submerged arc welding, one or more welding electrodes arranged in sequence melt into an arc. [0003] The weld (especially the molten material and the arc) is protected under a layer of pulverised flux. The flux partially melts during the process, thus forming a protective layer of slag on the weld pool. The current used in this process is quite high, typically in the range of 300-1500 amps per electrode. The diameter of electrodes used in submerged arc welding is usually 2.5-6mm. [0004] Fluxes used in submerged arc welding are granular fusible minerals typically containing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/095B23K9/18
CPCB23K9/188B23K9/095B23K9/1735B23K9/18B23K9/24
Inventor 丹尼尔·伦纳特松托马斯·约翰松乌尔夫·安德鲁布·梅林
Owner ESAB AB
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