Abstract: A combined extraction/shielding gas nozzle (10) of an arc welding torch with a consumable electrode has a shielding gas channel (1) for supplying shielding gas to the welding process and has an extraction device (3) with at least one extraction channel (6) with an extraction opening (7) for extracting the flue gas produced during the welding process. The shielding gas channel (1) and the at least one extraction channel (6) are disposed radially and offset to one another in the axial direction such that the extraction opening (7) for the at least one extraction channel (6) lies behind the shielding gas channel (1) in the direction of flow of the flue gas.

Abstract: A combined extraction/shielding gas nozzle of an arc welding torch with a non-consumable electrode, such as a TIG or plasma torch, is attached to a torch body and has a shielding gas channel for supplying shielding gas to the welding process, and has an extraction device connected integrally to the shielding gas channel, for extracting the flue gas produced during the welding process. The flue gas discharge is arranged via the torch head and a guide on the torch body into the handle, rather than via a separate bypass line The flue gas is directed from the nozzle on the torch head through the torch body of the nozzle to the handle of the welding torch.

Abstract: A nozzle stock (3) for a torch neck (10) of a welding device has an internal cavity (7) and at least one gas-outlet opening (8), which is in fluidic connection with the gas outlet (2) of a gas nozzle (1). A nozzle-stock insert (20) in the internal cavity (7) of the nozzle stock (3) has a front end (23) and a rear end (24), wherein the outer wall (22) of the nozzle-stock insert (20) is at a distance from the inner wall (9) of the nozzle stock (3), at least in some regions, to form a flow space (11) that is in fluidic connection with the gas-outlet opening (8) of the nozzle stock (3). A front and/or rear inflow region, which is formed by a front and/or rear gap (25, 26), is provided at the front end (23) and/or at the rear end (24) of the nozzle-stock insert (20).

Abstract: A supplementary circuit for process supply lines of a welding torch or cutting torch has at least one connection device to a welding current source arranged on it, wherein electrical energy and other media are conveyed to the welding torch or cutting torch via the connection device and via a process supply line that is preferably held in a hose pack of the welding torch or cutting torch. Electrical energy for operating a peripheral device, such as a sensor, a drive unit or a controller for the drive unit, is branched or tapped off from at least one electrical process supply line without significantly affecting the electric arc process. The supplementary circuit provided for branching or tapping off the electrical energy is coupled in parallel onto the welding current circuit. This coupling is based on direct ohmic contact or on a galvanic coupling.

Abstract: A device (10) for thermally joining workpieces has a torch (1) and an extraction unit (2) for extracting fumes that are produced during welding, cutting or soldering processes. At least one sensor (3) determines the position and/or position changes of the torch (1) and/or a reference point in the area relative to a reference position of the torch (1) and/or of the workpiece that is to be processed. Volume flow of extracted fumes at the extraction unit (2) acting at the torch (1) is adjusted as a function of the determined position and/or position change of the torch (1).

Abstract: The invention relates to a wire-feed device for conveying a wire and to a method for feeding wire using a wire-feed device, in particular for a thermal joining apparatus, having at least one a drive element which can be operated by a feed drive and can be placed against a wire guided through the wire-feed device, exerting a contact pressure, in order to transfer drive movement by friction. According to the invention, an actuator which is coupled to the at least one drive element and can be controlled by a controller using the values measured for the contact pressure, is provided for variably setting the contact pressure acting on the wire.

Abstract: A gas nozzle for the outflow of a protective/shielding gas stream from a gas outlet of the gas nozzle having a gas distributor/diffuser section has a double-walled configuration at least in a partial area of the gas distributor/diffuser section in order to create a flow space for the protective/shielding gas stream. The invention also relates to a torch neck and to a method for thermally joining at least one workpiece, in particular for arc joining, preferably for arc welding or arc brazing/soldering, with an electrode which is arranged in the torch neck or with a wire for producing an arc between the electrode or the wire and the workpiece, and having a gas nozzle for the outflow of a protective/shielding gas stream from a gas outlet.

Abstract: The invention relates a torch body for thermal joining of at least one workpiece, in particular for arc welding or arc brazing, said torch body comprising a non-consumable electrode provided in the body, in particular a tungsten electrode, for generating an arc between the electrode and the workpiece. The torch body has an end nozzle, which is devoid of potential, for discharging a shielding gas flow from a gas outlet. A secondary flow channel is provided for dividing the shielding gas flow into a main gas flow and a secondary gas flow, the secondary gas flow annularly surrounding the main gas flow at the gas outlet.