Title:
SOLID-PHASE SPOT-WELDING METHOD AND SOLID-PHASE SPOT-WELDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/182444
Kind Code:
A1
Abstract:
The present invention provides: a solid-phase spot-welding method with which the welding temperature can be controlled accurately and with which a reduction in the welding temperature can be achieved, regardless of the type of metal material being welded; and a solid-phase spot-welding device that can be used suitably in this solid-phase spot-welding method. This solid-phase welding method involves overlapping metal plate materials and carrying out spot-welding, and is characterized by having a welding preparation step in which two or more metal plate materials are held in a state in which same overlap one another, thereby forming an interface to be welded, a temperature-raising step in which a pair of electrodes are used and the interface to be welded is heated by supplying a current by a direct method, an indirect method, or a series method, thereby forming a softened region in the vicinity of the interface to be welded, and a stress application step in which an external stress greater than or equal to the yield strength of the metal plate materials at a desired welding temperature is applied to the softened region, wherein the metal plate materials are welded to each other by subjecting the softened region to local deformation.
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Inventors:
FUJII HIDETOSHI (JP)
MORISADA YOSHIAKI (JP)
KAMAI MASAYOSHI (JP)
AIBARA TAKUMI (JP)
MORISADA YOSHIAKI (JP)
KAMAI MASAYOSHI (JP)
AIBARA TAKUMI (JP)
Application Number:
PCT/JP2021/009182
Publication Date:
September 16, 2021
Filing Date:
March 09, 2021
Export Citation:
Assignee:
UNIV OSAKA (JP)
International Classes:
B23K20/00
Foreign References:
| JP2011031266A | 2011-02-17 | |||
| JP2018114536A | 2018-07-26 | |||
| JP2008284570A | 2008-11-27 | |||
| JP2013103273A | 2013-05-30 | |||
| JP2007332452A | 2007-12-27 |
Other References:
JAPAN WELDING SOCIETY PROCEEDINGS, vol. 14, no. 4, 1996, pages 754 - 761
Attorney, Agent or Firm:
IPR CONSULTANT PPC (JP)
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