Adaptive schedule selective weld control

Details Adaptive schedule selective weld control Adaptive schedule selective weld control

1982-03-29

1984-06-26

Shaw, C. C.

Electric heating

Metal heating

For bonding with pressure

2191171, B23K 1124

Patent

active

044568100

ABSTRACT:
A spot weld control senses differences in welding current required to produce an optimum weld by determining the time rate of change of resistance during the increasing resistance portion of the weld cycle. The weld control can reduce the welding current if the time rate of resistance change exceeds a maximum value and increase the current if the resistance change is less than a minimum value. The weld current may be terminated when a decrease in resistance from the peak resistance value has reached a predetermined percentage of the peak resistance value or terminated after a predetermined number of current cycles.

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