Title:
RESISTANCE SPOT WELDING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/057602
Kind Code:
A1
Abstract:
Provided is technology with which a nugget can be grown to a desired size in a short time while suppressing the occurrence of spatter. This resistance spot welding method comprises: a pre-energization step in which energization is performed until an alloy layer diameter, which is the diameter of an alloy layer that is formed on the outer periphery of the nugget in the welding area and is composed of the constituent material of the plating layer on the metal plate to be welded and the base material of the metal plate, reaches a predetermined target diameter; and a main energization step in which energization is performed after the pre-energization step. The pre-energization step includes pulsation energization repeating, at intervals of less than 10 ms, high-current energization in which energization is performed at a current higher than a predetermined threshold current and low-current energization in which energization is performed at a current equal to or less than the predetermined threshold current. The pulsation energization includes two or more instances of high-current energization.
Inventors:
OGURA SHUHEI (JP)
SEKIGUCHI TOMOHIKO (JP)
IZUNO KYOSUKE (JP)
TAMADA YOSUKE (JP)
FUKAYA TAKAHIRO (JP)
SEKIGUCHI TOMOHIKO (JP)
IZUNO KYOSUKE (JP)
TAMADA YOSUKE (JP)
FUKAYA TAKAHIRO (JP)
Application Number:
PCT/JP2023/015769
Publication Date:
March 21, 2024
Filing Date:
April 20, 2023
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
International Classes:
B23K11/24; B23K11/16
Domestic Patent References:
| WO2015170687A1 | 2015-11-12 | |||
| WO2015083381A1 | 2015-06-11 |
Foreign References:
| JP2022085358A | 2022-06-08 |
Attorney, Agent or Firm:
BENRISHIHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
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