Title:
MANUFACTURING METHOD FOR RESISTANCE SPOT WELD JOINT AND RESISTANCE SPOT WELDING DEVICE
Document Type and Number:
Japanese Patent JP2022105379
Kind Code:
A
Abstract:
To provide a manufacturing method for a resistance spot weld joint that can stably form a spot weld zone having a predetermined size while suppressing occurrence of dispersion, and a resistance spot welding device.SOLUTION: A manufacturing method for a resistance spot weld joint comprises a step of performing resistance spot welding while overlapping two or more steel plates with each other. In the welding, an applied pressure change rate α=(P-P1)/(T-T1) is controlled to a predetermined threshold or more in a period of time from T1 until the welding is finished. T is a time elapsed since a time point when the welding is started, P is applied pressure at a time point elapsed by T after the welding is started, T1 is an elapsed time between a time point when a value obtained by differentiating P by T becomes zero for the second time when counted from a time point when power distribution in the welding is started and a time point when the welding is started, and P1 is applied pressure at a time point elapsed by T1 after the welding is started.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
FURUSAKO SEIJI
KODAMA SHINJI
KODAMA SHINJI
Application Number:
JP2021000107A
Publication Date:
July 14, 2022
Filing Date:
January 04, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B23K11/24; B23K11/11; B23K11/16
Attorney, Agent or Firm:
Sumio Tanai
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi
Previous Patent: Vehicle front structure
Next Patent: Switch devices, communication systems, communication methods, and programs
Next Patent: Switch devices, communication systems, communication methods, and programs