- Patent Title: Resistance spot welding method and welded member production method
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Application No.: US16062407Application Date: 2016-12-13
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Publication No.: US10946470B2Publication Date: 2021-03-16
- Inventor: Chikaumi Sawanishi , Koichi Taniguchi , Katsutoshi Takashima , Hiroshi Matsuda , Rinsei Ikeda
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: RatnerPrestia
- Priority: JPJP2015-244823 20151216
- International Application: PCT/JP2016/087014 WO 20161213
- International Announcement: WO2017/104647 WO 20170622
- Main IPC: B23K11/11
- IPC: B23K11/11 ; B23K11/16

Abstract:
Provided is a resistance spot welding method that inhibits, in accordance with the degree of axis misalignment between electrodes, the occurrence of cracking in a weld regardless of the steel grade. In resistance spot welding methods according to the present invention, H (ms) is an electrode force retaining time after completion of current passage, D (mm) is an amount of axis misalignment between the electrodes, t (mm) is a total sum of sheet thicknesses of a plurality of overlapping steel sheets, T (MPa) is a tensile strength of a steel sheet having a highest tensile strength among the plurality of steel sheets, F (N) is an electrode force, and d (mm) is a tip diameter of one electrode of the pair of electrodes that has a smaller tip diameter. The electrode force retaining time H is specified to be a predetermined value or greater.
Public/Granted literature
- US20190001429A1 RESISTANCE SPOT WELDING METHOD AND WELDED MEMBER PRODUCTION METHOD Public/Granted day:2019-01-03
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