Title:
ONE-SIDE SUBMERGED ARC WELDING METHOD AND ONE-SIDE SUBMERGED ARC WELDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/151160
Kind Code:
A1
Abstract:
This one-side submerged arc welding method and device joins two steel plates butt-joined by submerged arc welding from one side using a plurality of electrodes. During the submerged arc welding, at least one inter-electrode distance between neighboring electrodes in a terminal-side region of the steel plates is contracted more than the inter-electrode distances in a region to the front of the terminal-side region. The variation in heat input of electrodes that move due to contraction of the inter-electrode distance in a transition region where the inter-electrode distance is contracted is 20% or less of the heat input at the origin of the transition region. Due to this configuration, the present invention can be applied to steel plates with a wide range of thicknesses, thereby preventing cracking of weld metal at terminal sections of the joint by the suppression of rotational deformation, and reducing post-welding touching-up.
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Inventors:
YOKOTA HIROYOSHI
SUWA TAKANOBU
KOMURA MASAHARU
KIHATA SHIGERU
SUGIYAMA DAISUKE
SUWA TAKANOBU
KOMURA MASAHARU
KIHATA SHIGERU
SUGIYAMA DAISUKE
Application Number:
PCT/JP2019/002579
Publication Date:
August 08, 2019
Filing Date:
January 25, 2019
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K9/18
Domestic Patent References:
| WO2018135505A1 | 2018-07-26 |
Foreign References:
| JPH0211350B2 | 1990-03-13 | |||
| JP6184362B2 | 2017-08-23 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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