Fronius International Gmbh

Andreas Waldhör

Dominik Söllinger

Manuel Binder

Josef Artelsmair

Manuel Mayer

Manfred Schörghuber

Martin Willinger

Rene Allerstorfer

Rick Grunwald

Willi Baumann

Dominik SÖLLINGER

Wolfgang Kalteis

Angelika Kogler

In a method in which a welding process is carried out on a workpiece with a welding torch and to a welding device for carrying out the method, a welding current source is supplied in order to provide a welding voltage, and an electrical voltage is applied, at least temporarily, during the welding process to an external element of the welding torch, in particular to an outer wall of a gas nozzle, and a possibly occurring electrical contact between the external element and a further element, in particular the workpiece or a contact tube, is detected by the electrical voltage applied. The welding current source is electrically connected via at least one first resistor to the external element of the welding torch and the external element of the welding torch is connected to the electrical potential of the workpiece via at least one second resistor.

Method and welding device with detection of electrical contacts during a welding process

A a multiple welding method having an improved starting process in which the control unit of the guide electrode starts welding-wire advancing of the guide electrode and sends a synchronization signal to the control unit of the trailing electrode when the guide electrode has moved a certain distance or for a certain time. The control unit of the trailing electrode starts welding-wire advancing of the trailing electrode in dependence on the received synchronization signal before the guide electrode touches the workpiece.

Multiple welding method

In a method for regulating or controlling the conveyance speed of a wire composed of consumable material during a laser soldering or welding method, the wire is melted by a laser beam from a laser unit and is conveyed at a mean conveyance speed toward a workpiece to be processed, wherein a voltage between the wire and the workpiece is measured. A laser soldering or laser welding device carries out this method. In order to avoid at least relatively lengthy short-circuit breaking between the end of the wire and the workpiece, the conveyance speed of the wire, as a function of the measured voltage, is temporarily increased to a predetermined boost speed by increasing the conveyance speed to the predetermined boost speed when a defined voltage limit value is exceeded, and the conveyance speed is reduced again at the latest when the voltage limit value falls below.

Method for regulating or controlling the conveyance speed of a wire composed of consumable material during a laser soldering or laser welding method, and laser soldering or laser welding device for carrying out such a method

Method and device for marking a workpiece surface (A) of a metal workpiece (), in which a welding torch () comprising a welding wire electrode () is guided along the workpiece surface (A) to be marked and meanwhile a wire end (A) of the welding wire electrode () is moved towards and away from the work-piece surface (A) to be marked, wherein an electric voltage (U) present at the welding wire electrode () and/or an electric current (I) flowing through the welding wire electrode () bring about electric sparks, which bring about material removal and/or material alteration at the workpiece surface (A) of the metal workpiece () to mark the workpiece surface (A).

Method and device for making a workpiece surface of a metal workpiece

A welding device has a central unit and a welding torch unit, which can be connected to the central unit. The central unit includes at least one welding current source for providing electric current needed to operate the welding torch unit and includes a control unit. The welding torch unit includes at least a first welding torch with a first welding wire and a second welding torch with a second welding wire. The control unit is configured to carry out a starting process in such a way that firstly a first arc ignition takes place at one of the two welding torches and after a waiting time since the first arc ignition has passed, a second arc ignition takes place at the other of the two welding torches, which until then was not ignited.

Welding device having two welding torches and control unit for starting the arc ignition process, and welding method for welding with two welding processes under an adapted starting process

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Pettenbach, Austria

Andreas Waldhör