Method and device for determining the voltage at welding power sources
AssigneeKuka Schweissanlagen GmbH
InventorJörg Herrich
Life of this patent
Estimating the term…
Abstract
A process and a device are provided for determining the working voltage of welding current sources 25. The working voltage is determined partly outside the output terminals 23, 24 of the welding current source 25. The tap 2 is preferably performed on the wire electrode 16 or on the wire feed roller 17 of a wire electrode 16. The other tap 3, 4 may be performed on the workpiece 21, a workpiece connection 22 or on an output terminal 24 of the welding current source 25 or alternatively in the welding current source 25.
Claims18
A process for determining the working voltage on a welding device having a controllable welding current source, a wire electrode, a wire feed having a wire feed direction and a device for determining the working voltage associated with the welding current source, the process comprising:
- introducing current to the wire electrode at welding current source output terminals, defining current introduction locations;
- determining the working voltage by measuring voltage at least at one location partly outside the introducing locations of the output terminals of the welding current source, including providing one tap at a spaced location upstream from the current introduction locations with respect to the wire feed direction, the one tap being provided one of directly in contact with the wire electrode or in contact with the wire feed roller of the wire electrode.
A welding device comprising:
- a welding current source with a current source controller and with output terminals;
- a wire electrode;
- a wire feed for feeding said wire electrode in a feed direction, one of said terminals being in electrical contact with said electrode;
- a device for determining the working voltage drop;
- and
- taps located connected to said current source controller of the said welding current source, one of said taps being arranged upstream with respect to said feed direction, at a spaced location from said one of said terminals said one of said taps being either directly in contact with said wire electrode or being in contact with said wire feed roller.
A welding device comprising:
- a welding current source with a current source controller and with output terminals;
- a wire electrode;
- a wire feed for feeding said wire electrode in a feed direction;
- a contact tube in electrical contact with said wire electrode for introducing welding current into the wire electrode, said one of said terminals being connected to said contact tube, one of said terminals being in electrical contact with said electrode;
- a workpiece, another of said terminals being in electrical connection with said workpiece;
- and
- a first voltage sensing tap connected to said current source controller of the said welding current source and a second voltage sensing tap connected to said current source controller of the said welding current source, said first tap being arranged upstream with respect to said feed direction, at a spaced location from said one of said terminals said first tap being either directly in electrical contact with said wire electrode or being in electrical contact with said wire feed roller, said second tap being in electrical contact with said workpiece.
Dependencies are inferred from the claim text.