| 发明名称 |
WELDED STRUCTURE AND METHOD FOR MANUFACTURING THE SAME |
| 摘要 |
There is provided a welded structure that can reduce fractures at welded portions. The welded structure includes two or three steel sheets and a lapped portion in which the steel sheets are overlapped and joined by spot welding at a plurality of locations, the welded structure including a spot weld portion, and, when a diameter of a nugget is dng (mm), a tip diameter of an electrode used by the spot welding is d (mm), and an average thickness per steel sheet of the steel sheets at the lapped portion is tave (mm), the spot weld portion satisfies dng>d(tave)1/2 when 0.5 mm≦tave<1.1 mm and dng>1.05d when 1.1 mm≦tave≦2.6 mm, in accordance with the average thickness tave (mm). |
| 申请公布号 |
US2017008119(A1) |
申请公布日期 |
2017.01.12 |
| 申请号 |
US201515120543 |
申请日期 |
2015.03.16 |
| 申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
NAKAZAWA Yoshiaki;OKADA Tohru;ITO Yasuhiro;YASUYAMA Masanori;SAWA Yasunori |
| 分类号 |
B23K11/16;B23K11/11;B23K11/30;F16B5/08 |
主分类号 |
B23K11/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A welded structure including two or three steel sheets and a lapped portion in which the steel sheets are overlapped and joined by spot welding at a plurality of locations, the welded structure comprising:
a spot weld portion, and, when a diameter of a nugget is dng (mm), a tip diameter of an electrode used by the spot welding is d (mm), and an average thickness per steel sheet of the steel sheets at the lapped portion is tave (mm), the spot weld portion satisfies a condition (a) or a condition (b) below in accordance with the average thickness tave (mm),
(a) dng>d(tave)1/2 when 0.5 mm≦tave<1.1 mm (1)(b) dng>1.05d when 1.1 mm≦tave≦2.6 mm (2). |
| 地址 |
Tokyo JP |
