Resistance spot welding method and resistance spot welding apparatus
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United States of America Patent
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Feb 15, 2022
Grant Date -
Sep 12, 2019
app pub date -
Mar 6, 2019
filing date -
Mar 9, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Provided are a method and an apparatus for resistance spot welding in which preliminary current application is executed and then main welding is executed in accordance with master patterns of various parameters obtained during the preliminary current application. The main welding is executed under welding conditions of the master patterns, and whether a welding abnormality has occurred and whether the welding abnormality is likely to occur are determined. When the welding abnormality is likely to occur, the welding conditions for the main welding are corrected so as to prevent the welding abnormality. When the welding abnormality is unlikely to occur, the welding conditions for the main welding are corrected so as to match the master patterns.
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