Method for monitoring a welding machine, method for regulating the welding machine and device for carrying out the method
First Claim
1. In a method for monitoring a welding machine for producing a spot-welded joint between two components to be welded together by at least one electrode being in contact with one of the components, which comprises:
- passing a welding current through the components during a welding period, and measuring a thermo-electrical voltage between the electrode and the components outside the welding period,monitoring functional capability of the welding machine on the basis of the thermo-electrical voltage, by determining a monitoring variable from the thermo-electrical voltage and comparing the monitoring variable with a reference variable of the welding machine.
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Accused Products
Abstract
A welding machine produces a spot-welded joint between two components to be welded together by at least one electrode being in contact with one of the components, by passing a welding current through the components during a welding period, and measuring a thermo-electrical voltage between the electrode and the components outside the welding period. A method for monitoring the welding machine on the basis of the thermo-electrical voltage includes determining a monitoring variable from the thermo-electrical voltage and comparing the monitoring variable with a reference variable of the welding machine. The method can be used for regulating a welding machine, especially for producing a plurality of spot-welded joints. A device for carrying out the method includes at least one measuring instrument, in particular a voltage meter, disposed between the components to be welded together and the electrode. An evaluation and regulating device is connected downstream of said measuring instrument.
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Citations
19 Claims
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1. In a method for monitoring a welding machine for producing a spot-welded joint between two components to be welded together by at least one electrode being in contact with one of the components, which comprises:
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passing a welding current through the components during a welding period, and measuring a thermo-electrical voltage between the electrode and the components outside the welding period, monitoring functional capability of the welding machine on the basis of the thermo-electrical voltage, by determining a monitoring variable from the thermo-electrical voltage and comparing the monitoring variable with a reference variable of the welding machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a method for regulating a welding machine for producing a plurality of spot-welded joints between two components to be welded together by at least one electrode being in contact with one of the components, which includes passing a welding current through the components during a welding period, and measuring a thermo-electrical voltage between the electrode and the components outside the welding period, the improvement which comprises:
monitoring the welding machine on the basis of the thermo-electrical voltage, by determining a monitoring variable from the thermo-electrical voltage and comparing the monitoring variable with a reference variable of the welding machine. - View Dependent Claims (14, 15, 16, 17)
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18. A device for monitoring the functional capability of a welding machine for producing a spot-welded joint between two components to be welded together by at least one electrode being in contact with one of the components, comprising:
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a current source for passing a welding current through the components during a welding period; at least one measuring instrument disposed between the components to be welded together and the electrode for measuring a thermo-electrical voltage between the electrode and the components outside the welding period; and an evaluation and regulating device connected downstream of said measuring instrument for monitoring the welding machine on the basis of the thermo-electrical voltage, by determining a monitoring variable from the thermo-electrical voltage and comparing the monitoring variable with a reference variable of the welding machine. - View Dependent Claims (19)
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Specification