Resistance welding apparatus with power control for reduced arcing
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United States of America Patent
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-
Nov 12, 1991
Grant Date -
N/A
app pub date -
Aug 24, 1990
filing date -
Aug 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A resistance welding apparatus includes a power supply, a pair of welding electrodes and a welding circuit which is operative for controlling the operation of the electrodes to effect a welding operation. The welding circuit is operative for controlling the operation of the electrodes so that a welding operation can only be carried out on a workpiece assembly in the event that the resistance in the circuit path between the electrodes is within a range which is not likely to cause arcing between one or both of the electrodes and the workpiece assembly. The welding circuit further includes a current comparator for controlling the level of the current passed through the electrode during a welding operation.
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