Title:
STEEL SHEET LAP WELDING METHOD AND LAP WELDED JOINT
Document Type and Number:
WIPO Patent Application WO/2017/047752
Kind Code:
A1
Abstract:
Provided is a steel sheet lap welding method that comprises: a spot welding step in which a nugget (110) is formed between a first steel sheet member (1X) and a flange part (2) of a second steel sheet member (1Y) which includes the flange part (2) and a vertical wall (4), the nugget formed by spot welding in a state in which the flange part (2) is stacked onto the first steel sheet member (1X); and a laser welding step in which, after the spot welding step, a weld bead (120) is formed by laser welding in a region between an curve end point(3a) of the vertical wall (4) and the nugget (110). The weld bead (120) has a length dimension (L) that is equal to or greater than the diameter (Dn) of the nugget (110), and a width dimension (W) of 0.5-3.0 mm.
Inventors:
FURUSAKO SEIJI (JP)
OKADA TOHRU (JP)
SATO KOICHI (JP)
MIYAZAKI YASUNOBU (JP)
OKADA TOHRU (JP)
SATO KOICHI (JP)
MIYAZAKI YASUNOBU (JP)
Application Number:
PCT/JP2016/077456
Publication Date:
March 23, 2017
Filing Date:
September 16, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B23K26/346; B23K11/11; B23K26/21; B23K28/02
Domestic Patent References:
| WO2015119159A1 | 2015-08-13 |
Foreign References:
| DE10048233A1 | 2002-04-11 | |||
| JP2007167916A | 2007-07-05 | |||
| JP2014015206A | 2014-01-30 |
Other References:
See also references of EP 3351340A4
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
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