Title:
ARC SPOT WELDING METHOD AND WELDING DEVICE FOR PERFORMING SAME
Document Type and Number:
WIPO Patent Application WO/2016/056563
Kind Code:
A1
Abstract:
Provided are an arc spot welding method capable of producing a predetermined weld bead diameter and reinforcement height in rear-surface weld beads during arc spot welding and obtaining weld joints having excellent tensile strength in terms of both TSS and CTS, and a welding device for performing the method. In the method, a steel plate (1) having a thickness t and containing at least 0.2 mass% carbon, and at least one steel plate (1) having a thickness of at least t and containing at least 0.2 mass% carbon are positioned so as to overlap; a backing metal (4), which has a non-contacting part and a contacting part whereby the non-contacting part is maintained in a non-contact state relative to the rear surface of the lower steel plate, is positioned such that the contacting part contacts the rear surface of the lower steel plate (1) at a position more than 3t from the circle-equivalent center of a rear-surface weld bead; arc generation is repeatedly carried out in alternation with the application of a short-circuit current at which the welding voltage between a welding wire and the upper steel plate becomes 10 V or less, such that the period of the short-circuit current application is 30–60%, exclusive, per cycle; and the steel plates (1, 1) are welded.
Inventors:
KODAMA SHINJI (JP)
FURUSAKO SEIJI (JP)
MIYAZAKI YASUNOBU (JP)
FURUSAKO SEIJI (JP)
MIYAZAKI YASUNOBU (JP)
Application Number:
PCT/JP2015/078387
Publication Date:
April 14, 2016
Filing Date:
October 06, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B23K9/007; B23K9/02; B23K37/06
Domestic Patent References:
WO2015016287A1 | 2015-02-05 |
Foreign References:
JP2009507646A | 2009-02-26 | |||
JPH08155645A | 1996-06-18 | |||
JPH0639542A | 1994-02-15 | |||
CN102896398A | 2013-01-30 | |||
US4359599A | 1982-11-16 |
Other References:
See also references of EP 3205433A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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