Welding control

Details Welding control Welding control

1991-12-20

1992-09-22

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219110, 320 1, B23K 1126

Patent

active

051499339

ABSTRACT:
Voltage stored in a capacitor bank (12) of a capacitor discharge welding apparatus is modified in accordance with the magnitude of output energy actually delivered to the weld. After empirically determining capacitor bank voltage and output energy emloyed in the making of an acceptable weld, energy delivered to subsequent welds is monitored (50,56). An efficiency factor based upon stored voltage and delivered energy of the prior weld is determined. Based upon this efficiency factor and the output energy delivered during the prior weld, a new value of capacitor voltage is calculated for use in a subsequent weld. Regulation of the voltage on the capacitor bank (12) is determined by a feedback circuit which senses capacitor bank voltage, compares it to a set point, and shuts down a boost charging circuit when capacitor voltage has reached a predetermined amount.

REFERENCES:
patent: 3394240 (1968-07-01), Broomhall
patent: 3436514 (1969-04-01), Broomhall et al.
patent: 4182949 (1980-01-01), Powers et al.
patent: 4228340 (1980-10-01), Dufrenne
patent: 4785159 (1988-11-01), Hruska
patent: 4965860 (1990-10-01), Jochi

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