Title:
METHOD FOR MANUFACTURING SPOT WELD JOINT, STEEL SHEET FOR SPOT WELDING, AND STEEL SHEET MEMBER FOR SPOT WELDING
Document Type and Number:
WIPO Patent Application WO/2019/070075
Kind Code:
A1
Abstract:
Provided is a method for spot welding that is a technique for spot welding with which it is possible to suppress intrusion of hydrogen, which is one factor leading to delayed fracture, during spot welding, wherein the method involves: machining in advance one or both steel sheet surfaces that form facing surfaces of overlapped steel sheets, the machining being carried out at locations that form contact points at which the steel sheets contact each other during initial application of pressure for spot welding, and forming a plurality of lines that extend through the contact points to beyond the contact points; and performing spot welding at the locations of the contact points. Also provided is a steel sheet on which a plurality of lines are machined in advance at locations that form contact points at which steel sheets contact each other during initial application of pressure for the spot welding.
Inventors:
MATSUI SHO (JP)
SAITO MASAHIRO (JP)
FURUSAKO SEIJI (JP)
MIYAZAKI YASUNOBU (JP)
SAITO MASAHIRO (JP)
FURUSAKO SEIJI (JP)
MIYAZAKI YASUNOBU (JP)
Application Number:
PCT/JP2018/037476
Publication Date:
April 11, 2019
Filing Date:
October 05, 2018
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B23K11/11; B23K11/34
Domestic Patent References:
| WO2016047023A1 | 2016-03-31 |
Foreign References:
| JPS645832A | 1989-01-10 | |||
| JP2014185369A | 2014-10-02 | |||
| JP2015093282A | 2015-05-18 |
Other References:
See also references of EP 3693120A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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