Abstract: A method for synchronizing welding currents of at least two welding current sources prior to performing a simultaneous welding process on at least one workpiece, in particular a welding process with non-consumable electrodes, wherein the method includes the following steps: a first welding current source outputting a reference signal, wherein the reference signal contains synchronization information; a second welding current source measuring or receiving the reference signal and evaluating the synchronization information contained in the reference signal; synchronizing a second welding current of the second welding current source with a first welding current of the first welding current source on the basis of the synchronization information. The invention furthermore relates to a welding current source and to a system having at least two welding current sources.

Abstract: In order to easily regulate the supply of welding wire to the welding point during a welding process, the electrical potential produced by the welding current around the electrode is tapped with the welding wire and the control of the welding wire feed speed is carried out on the basis of the tapped potential and this control results in an average welding wire feed speed being established.

Abstract: The aim of the invention is to enable a stable welding process. This is achieved in that a welding device is supplied with a supply power by an energy source and converts at least a part of the supply power into a welding power in order to generate a welding arc, wherein the welding power is regulated by specifying a welding current. For this purpose, the supply voltage is determined, and the maximum supply current that can be delivered to the welding device from the energy source is specified. A maximum supply power is calculated using the supply voltage and the maximum supply current. The maximum welding power that is delivered by the welding device is determined from the maximum supply power, and the welding power is limited to the maximum welding power that can be delivered.

Abstract: A method and a welding device for contactlessly striking an arc between an electrode of a welding head and a material surface of a workpiece. A first ignition voltage pulse with a first or second polarity is generated between the electrode and the material surface. After being struck and, where applicable, after a polarity reversal, the arc is maintained with the second polarity or with an alternating polarity. In the event of an ignition failure, after the first ignition voltage pulse, a sequence of ignition voltage pulses is generated according to a sequence pattern until successful striking of the arc. The sequence pattern includes ignition voltage pulses with the first polarity and ignition voltage pulses with the second polarity, and an ignition pause is provided between ignition voltage pulses with the first polarity and ignition voltage pulses with the second polarity.

Abstract: A method for synchronizing welding currents of at least two welding current sources prior to performing a simultaneous welding process on at least one workpiece, in particular a welding process with non-consumable electrodes, wherein the method includes the following steps: a first welding current source outputting a reference signal, wherein the reference signal contains synchronization information; a second welding current source measuring or receiving the reference signal and evaluating the synchronization information contained in the reference signal; synchronizing a second welding current of the second welding current source with a first welding current of the first welding current source on the basis of the synchronization information. The invention furthermore relates to a welding current source and to a system having at least two welding current sources.

Abstract: A welding apparatus for welding workpieces by means of a welding arc which is ignited between a non-consumable welding electrode and the workpieces and produces a molten pool, wherein the welding is performed in a welding process including a plurality of welding cycles, the parameters of which can be set via an interface of the welding apparatus. Each welding cycle of the welding process has a high-current welding phase, during which a high welding current flows, and a low-current welding phase, during which a low welding current flows. In the high-current welding phase and/or in the low-current welding phase of, with the relevant welding cycle being set accordingly, current pulses can be applied, and at the beginning of the high-current welding phase, with the relevant welding cycle being set accordingly, high-frequency ignition pulses can be applied for the contactless ignition of the welding arc.

Abstract: The invention relates to a method and a device (1) for welding by means of a non-consumable electrode (2), wherein a welding current (I) alternating in polarity at a welding frequency (fS) is applied by a current source (3) between the electrode (2) and a workpiece (4) in order to form an arc (5), and the polarity is changed back to the polarity before the polarity change if the voltage (U) is above the voltage threshold value (US+, US?) and the welding current (I) is below the current threshold value (IS+, IS?).

Abstract: Operating panel (1) for a welding device (SG) comprising a welding parameter display unit (2) for displaying welding parameters, and comprising at least one operating element (3) which can be actuated manually by a user, wherein the operating panel (1) can be switched between a welding parameter selection mode and a welding parameter editing mode by actuating the operating element (3), wherein in the welding parameter selection mode one of the welding parameters of the welding parameter display unit (2) can be selected by rotating the operating element (3), and wherein in the welding parameter editing mode a parameter value of a selected welding parameter of the welding parameter display unit (2) can be set by rotating the operating element (3).

Abstract: The invention relates to a method and a device (1) for welding by means of a non-consumable electrode (2), wherein a welding current (I) alternating in polarity at a welding frequency (fs) is applied by a current source (3) between the electrode (2) and a workpiece (4) in order to form an arc (5), and the polarity is changed back to the polarity before the polarity change if the voltage (U) is above the voltage threshold value (Us+, Us?) and the welding current (I) is below the current threshold value (Is+, Is?).

Abstract: In order to easily regulate the supply of welding wire to the welding point during a welding process, the electrical potential produced by the welding current around the electrode is tapped with the welding wire and the control of the welding wire feed speed is carried out on the basis of the tapped potential and this control results in an average welding wire feed speed being established.

Abstract: The invention relates to a welding device (1) having a welding torch (2), a feeder (3) for feeding a melting filler material (4) at a feed rate (v) to a weld (S), where the filler material (4) is melted with the aid of an electric arc (L), and a pre-heater (9) for heating the filler material (4) upstream of the weld (S) by means of a laser beam (7) having a laser power (P) and generated in a laser device (6). For space-saving and safe heating of the filler material (4) upstream of the weld (S), the pre-heater (9) includes a feed channel (5) for the filler material (4), and at least one deflector (8) is attached to the pre-heater (9) for deflecting the laser beam (7) to the filler material (4) in such a way that the laser beam (7) strikes the filler material (4) inside the feed channel (5) of the pre-heater (9).

Abstract: Burner for a welding apparatus having a non-melting electrode, a wire feed device for a welding wire and a power feed device for introducing an electric heating current into the welding wire that is supplied. The wire feed device can be activated in two directions of advance and an electric voltage applied by the power feed device to the welding wire can be regulated to ignite an igniting arc between the tip of the welding wire and the workpiece.

Abstract: The invention relates to a welding device (1) having a welding torch (2), a feeder (3) for feeding a melting filler material (4) at a feed rate (v) to a weld (S), where the filler material (4) is melted with the aid of an electric arc (L), and a pre-heater (9) for heating the filler material (4) upstream of the weld (S) by means of a laser beam (7) having a laser power (P) and generated in a laser device (6). For space-saving and safe heating of the filler material (4) upstream of the weld (S), the pre-heater (9) includes a feed channel (5) for the filler material (4), and at least one deflector (8) is attached to the pre-heater (9) for deflecting the laser beam (7) to the filler material (4) in such a way that the laser beam (7) strikes the filler material (4) inside the feed channel (5) of the pre-heater (9).

Abstract: Burner for a welding apparatus having a non-melting electrode, a wire feed device for a welding wire and a power feed device for introducing an electric heating current into the welding wire that is supplied. The wire feed device can be activated in two directions of advance and an electric voltage applied by the power feed device to the welding wire can be regulated to ignite an igniting arc between the tip of the welding wire and the workpiece.