Switching electrode and resistance welding device using same, spot welding device and spot welding method
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United States of America Patent
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Sep 3, 2019
Grant Date -
May 21, 2015
app pub date -
Apr 30, 2013
filing date -
May 18, 2012
priority date (Note) -
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Abstract
The invention provides a switching electrode which has a small variation in resistance value even when a large amount of current is repeatedly cut off and can carry a stable amount of current even when it is continuously used. In the invention, the switching electrode is used in a switch which includes a first switching electrode tip (21) and a second switching electrode tip (22), brings the first switching electrode tip (21) and the second switching electrode tip (22) into surface contact with each other to carry a current, and separates the first switching electrode tip (21) and the second switching electrode tip (22) to cut off the current. At least one of contact surfaces of the first switching electrode tip (21) and the second switching electrode tip (22) is a flat surface having an uneven portion.
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