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RESISTANCE SPOT WELDING METHOD

  • US 20160144451A1
  • Filed: 06/26/2014
  • Published: 05/26/2016
  • Est. Priority Date: 07/11/2013
  • Status: Active Application
First Claim
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1. A resistance spot welding method comprising:

  • a pulsation process of clamping a sheet assembly of two or more overlapping steel sheets including at least one high-tensile steel sheet using a pair of welding electrodes that are connected to a spot welding power source employing an inverter direct current method, and performing a plurality of repetitions of current passing and current pass stopping, while pressing the steel sheets with the welding electrodes; and

    a continuous current passing process in which, after the pulsation process, current is passed continuously for a longer period of time than a maximum current passing time of the pulsation process, while pressing the steel sheets with the welding electrodes.

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