Journal Published Online: 15 February 2019
Volume 47, Issue 6

Detection of an Electromotive Force during Resistance Spot Welding and Its Correlation with Nugget Growth

CODEN: JTEVAB

Abstract

This article presents a report on an electromotive force that appears in the electromagnetically open circuit during resistance spot welding. We measured the potential drop between the Cu electrodes during the supply of an alternating current while keeping the area surrounding the electrical lines available for the potential drop measurement. We detected a unique electromotive force in the opposite direction to the back electromotive force induced by the change in the current. Here, we demonstrate that the change in the electromotive force is closely associated with nugget growth and the generation of spatter during welding. Based on the temperature measurement around the Cu electrode, we observed a temperature ripple during the welding process and consider this as the driving force behind the electromotive force.

Author Information

Tohmyoh, Hironori
Department of Finemechanics, Tohoku University, Sendai, Japan
Hasegawa, Yuta
Toyota Motor East Japan, Iwate, Japan
Matsui, Yoichi
Toyota Motor East Japan, Iwate, Japan
Pages: 10
Price: $25.00
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Details
Stock #: JTE20180384
ISSN: 0090-3973
DOI: 10.1520/JTE20180384