Fronius International Gmbh

F.+s. Vermoegensverwaltungs Gmbh

Manuel Binder

Andreas Waldhoer

Manuel Mayer

Andreas Waldhör

Josef Artelsmair

Walter Stieglbauer

Christian Stumpfl

Dominik Söllinger

Günter Weigerstorfer

Stefan Pichler

Stephan Schartner

Stefan Roither

Manuel Buchinger

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

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

In a method for scanning the surface of metallic workpieces, during scanning, a welding torch with a consumable welding wire is moved over and towards the workpiece surface, until contact of the welding wire with the workpiece is detected, and the welding wire is subsequently moved away from the workpiece. Before scanning, slag-removal is carried out to remove slag at the welding wire end, wherein the welding current is lowered to a minimum, and the welding wire is moved cyclically with a rapid recurrent forward/backward movement over a specified path length toward the workpiece, and by a smaller distance away from the workpiece, until a short circuit between the welding wire and the workpiece is detected, whereupon slag-removal is ended, and upon the detection of no short circuit, slag-removal is repeated, and upon the detection of several short circuits one after the other, slag-removal is ended.

Method for scanning the surface of metal workpieces

Method for scanning the surface (O) of metallic workpieces (W), wherein, during a scanning process before a welding process is carried out, a welding torch () with a meltable welding wire () is moved over the surface (O) of the workpieces (W), and at predefined times (t) the welding wire () is moved towards the surface (O) of the workpieces (W) until a contact of the welding wire () with one of the workpieces (W) is detected, and the position (P) of the surface (O) of the workpieces (W) at each time (t) is determined and stored in the welding power source (), wherein an edge (K) is determined if the current position (P) of the surface (O) of the workpieces (W) exceeds at least one of the stored previous positions (P) of the surface (O) of the workpieces (W) by a predefined threshold value (S). To reduce the computing effort and to increase processing speed, the end of the edge (K) is determined if the current position (P) of the surface (O) of the workpieces (W) remains the same with respect to at least one of the stored previous positions (P), and if an edge (K) is determined, an edge detection parameter (KP) is set and output together with the current position value (P) and transferred to the manipulator ().

Method for scanning the surface of metal workpieces and method for carrying out a welding process

A beam-forming and deflecting optical system for a laser machining device includes at least two optical elements, which are arranged one behind the other in the direction of the laser beam and which are formed by wedges with respective wedge angles, wherein at least one optical element is connected to a drive for the rotation of the optical element about the optical axis, whereby an optical wedge can be rotated relative to the at least one other optical wedge. Also a method for machining a workpiece uses a collimated laser beam. In order to achieve different shapes of the laser beam on the workpiece, each of the optical wedges, which are arranged one behind the other, in each case cover only a part of the laser beam.

Beam-forming and deflecting optical system for a laser machining device, and method for machining a workpiece using a laser beam

Carrier module () for at least one semiconductor element () having a passively and/or actively cooled carrier () which has a positive carrier contact () and a negative carrier contact (), with a device () for bridging the at least one semiconductor element () arranged on the carrier (), comprising at least one first printed circuit board () with at least one bridging element (), wherein at least one positive contact () which is electrically conductively connected to the positive carrier contact () and at least one negative contact () which is electrically conductively connected to the negative carrier contact () are provided on a first printed circuit board () and the bridging element () is electrically conductively connected to the positive contact () and to the negative contact () of the first printed circuit board (), wherein the first printed circuit board () is thermally conductively and releasably connected to the carrier ().

Carrier module with bridging element for a semiconductor element

The invention relates to a spot welding rod for the resistance welding of workpieces, the rod comprising a drive, which displaces the pincer arms and is configured by a spur gear and a connecting rod that is connected to the gear, the spur gear being connected to one pincer arm and the connecting rod to the other pincer arm. The invention also relates to a method for adjusting the pressure of a spot welding rod of this type. The aim of the invention is to provide a spot welding rod of this type with a simple, compact, modular construction, whose drive requires minimum maintenance and which permits a high number of spot welds. To achieve this, the connecting rod is connected to the spur gear outside the center of the latter, in particular at a defined distance to the central axis of the spur gear by means of a bearing assembly, the latter executing a curved movement during the working operation. A compensation element for compensating workpieces of differing thicknesses is located between the connecting rod and the pincer arm.

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Pettenbach, Austria

Manuel Binder