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Process and device for regulation of resistance or arc welding processes

  • US 5,015,815 A
  • Filed: 11/30/1988
  • Issued: 05/14/1991
  • Est. Priority Date: 03/31/1987
  • Status: Expired due to Fees
First Claim
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1. A method of regulating a welding operation comprising the steps of measuring current strength of a welding current at welding electrodes and measuring voltage at welding electrodes;

  • determining a resistance index of a workpiece to be welded during the welding operation from values of the measured current strength of the welding current and the voltage;

    storing the resistance index;

    evaluating the resistance index by comprising it with an empirically determined correcting or command variable;

    determining quantitatively and with a resolution of at least 10,000 measuring points/sec from the measured values, the correlation of a welding influencing parameter selected from the group consisting of power, energy, charge amount, electrode voltage, current strength and their combinations, with the resistance index of the workpiece, said step of determining quantitatively the effect of the welding influencing parameter including detecting quantitatively the welding influencing parameter as a correcting or command variable; and

    employing the welding influencing parameter for controlling a welding energy.

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