Title:
WELDED STRUCTURE AND METHOD FOR MANUFACTURING WELDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2015/137512
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a welded structure capable of reducing fractures of a welded section. According to the present invention, there is provided a welded structure in which two or three steel plates (11, 12) are bonded by spot welding in a plurality of locations in a stacked section where the steel plates are stacked. In this welded structure, with the diameter of a nugget (14) denoted by dng(mm), the tip diameter of an electrode used in spot welding denoted by d(mm), and the average thickness per steel plate in the stacked section denoted by tave(mm), the spot welded section satisfies the relationship dng > d(tave)1/2 in accordance with the average thickness tave(mm) when 0.5 mm ≤ tave < 1.1 mm, and satisfies the relationship dng > 1.05 d when 1.1 mm ≤ tave ≤ 2.6 mm.
Inventors:
NAKAZAWA YOSHIAKI (JP)
OKADA TOHRU (JP)
ITO YASUHIRO (JP)
YASUYAMA MASANORI (JP)
SAWA YASUNORI (JP)
OKADA TOHRU (JP)
ITO YASUHIRO (JP)
YASUYAMA MASANORI (JP)
SAWA YASUNORI (JP)
Application Number:
PCT/JP2015/057656
Publication Date:
September 17, 2015
Filing Date:
March 16, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B23K11/11; B23K11/00; B23K11/16; B60R19/04; B60R19/34; B62D25/04; B62D25/08; B62D25/20; C22C38/00; C22C38/38
Foreign References:
| US3778583A | 1973-12-11 | |||
| US2244455A | 1941-06-03 | |||
| DE2419271A1 | 1975-11-06 | |||
| JPH07178563A | 1995-07-18 | |||
| US3028480A | 1962-04-03 | |||
| DE102011018653A1 | 2012-01-19 | |||
| FR2908335A1 | 2008-05-16 |
Other References:
TAKASHI NAKAMURA ET AL., GENDAI YOSETSU GIJUTSU TAIKEI, vol. 8, 23 January 1980 (1980-01-23), pages 70 - 72
HATSUHIKO OIKAWA ET AL.: "Resistance Spot Weldability of High Strength Steel (HSS) Sheets for Automobile", NIPPON STEEL TECHNICAL REPORT, NO.385, 20 October 2006 (2006-10-20), pages 36 - 41, XP055358140
See also references of EP 3103578A4
HATSUHIKO OIKAWA ET AL.: "Resistance Spot Weldability of High Strength Steel (HSS) Sheets for Automobile", NIPPON STEEL TECHNICAL REPORT, NO.385, 20 October 2006 (2006-10-20), pages 36 - 41, XP055358140
See also references of EP 3103578A4
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (JP)
Yoshiaki Kameya (JP)
Yoshiaki Kameya (JP)
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