Process and device for regulation of resistance or arc welding processes
First Claim
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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Abstract
A welding operation is regulated by determining quantitatively (numerically) and with high resolution from the measured values the effect of a welding influencing parameter power
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or/and energy or/and charge amount or/and electrode voltage or/and current strength ______________________________________
on the resistance. Current strength of a welding current and voltage at welding electrodes and measured and the resistance of a workpiece to be welded during the welding operation is determined and stored. The resistance is evaluated by comparing it with an empirically determined correcting or command variable.
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Citations
7 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- 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;
Specification