Title:
スポット溶接方法
Document Type and Number:
Japanese Patent JP6852035
Kind Code:
B2
Abstract:
A highly corrosion-resistant spot weldment can be produced at low cost without occurrence of prominent protrusions and the like on the surface. The spot weldment is joined by a nugget formed inside stacked sheet materials through bringing a pair of electrodes arranged opposite to each other into pressure contact with the stacked sheet materials from outside and energizing the stacked sheet materials from the electrodes. The nugget has a diameter that is ≥4√t (t: thickness of sheet material) and a flattening level of 3.5 to 8, which is a ratio of diameter to thickness. Both outer surface parts of the sheet materials are free from protrusions formed due to bulging of molten metal. Even when the electrodes are made of a copper alloy, the increased amount of Cu in the outer surface parts is 0.2 mass % or less with respect to the component composition before spot welding.
Inventors:
Hideaki Matsuoka
Amako Tatsuyuki
Takashi Asada
Large saw
Hioki Toru
Shuhei Ogura
Amako Tatsuyuki
Takashi Asada
Large saw
Hioki Toru
Shuhei Ogura
Application Number:
JP2018195320A
Publication Date:
March 31, 2021
Filing Date:
October 16, 2018
Export Citation:
Assignee:
Toyota Central R & D Labs.
TOYOTA JIDOSHA KABUSHIKI KAISHA
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B23K11/11; B23K11/30; B23K35/04
Domestic Patent References:
| JP2003164975A | ||||
| JP56039179A | ||||
| JP2007321182A | ||||
| JP2006224127A | ||||
| JP2004276058A | ||||
| JP10244379A |
Foreign References:
| US5914057 |
Attorney, Agent or Firm:
Morioka Masayuki
Sansui International Patent Office
Sansui International Patent Office