A system and method for repairing a metal substrate includes an electrospark device and an electrode removably supported in the electrode holder. The electrospark device applies a coating of a material when placed into contact with the metal substrate. A cooling device to lowers the temperature of shielding gas flow below an ambient temperature. A conduit is arranged to direct a flow of the shielding gas to the interface of the electrode and the substrate to cool the area of the substrate receiving the coating.

The invention relates to an electric arc-welding welding head comprising a contact device and one or more wire feeder units, the contact device encompassing an electrode assembly, the electrode assembly comprising at least two fusible continuously-fed wire electrodes arranged in a contact device. An electrically insulated duct is provided for electric insulation of at least one of the electrodes so that the electrode is electrically insulated from other electrodes in the electrode assembly. The invention also relates to an electric arc-welding contact device and an electric arc-welding welding head assembly.

A housing for securing a welding torch comprising a first aperture at a first end of the housing to receive a welding torch neck, a second aperture at a second end of the housing to receive a welding torch cable, and at least one fastener mounted on an external surface of the housing, wherein the fastener is configured to bias the welding torch cable toward the first aperture to secure the welding torch cable when the fastener is engaged.

A plasma torch includes an electrode, a center pipe, and a coolant passage. The electrode includes an internal passage, a tip portion, a convex portion, and an electrode insert. The center pipe is at least partially arranged in the internal passage of the electrode. The center pipe includes first and second pipe ends. The coolant passage first, second, third, and fourth passages. A coolant flows from the first passage through the second passage and the third passage to the fourth passage. At least a part of the convex portion is arranged in the center pipe. The inner surface of the center pipe includes a first inclined surface having a diameter that decreases toward a distal direction. The distal direction is a direction extending from the second pipe end to the first pipe end. The first inclined surface extends toward the root portion of the convex portion.

Submerged arc welding torches and systems to resistively preheat electrode wire are disclosed. A disclosed example submerged arc welding torch includes: a first contact tip configured to transfer weld current and preheating current to the wire; a second contact tip configured to conduct the preheating current to the wire; an air-cooled first conductive body portion configured to receive the weld current and to conduct the weld current and the preheating current to the first contact tip; an air-cooled second conductive body portion configured to receive the preheating current and to conduct the preheating current to the second contact tip; and an insulator coupled between the first and second conductive body portions.

Submerged arc welding torch adapted to perform welding in one single pass for each layer on high walls, of the type constituted by a support body from which two wire-guiding lances, held in reciprocal engagement by screws and pins, depart, each of said lances provided with an internal cavity for the insertion of the welding wire, at the end of which a welding material delivery nozzle is provided, characterized by the fact that further departing from said support body are a feeler lance support and a centrally arranged flow delivery duct, said wire-guiding cavities being incorporated into a pair of lances.

The invention relates to a coolant supply device of a machining device to be supplied with a fluid coolant, particularly with water, for example a welding arrangement (2) or a welding robot etc., the region or tool to be cooled, for example a welding cap, being incorporated into an open or closed coolant circuit which has an inflow (4) and an outflow (5), and said device comprising a conveyor device that operates in the coolant circuit and conveys the coolant within said coolant circuit, and a control device (8) for deactivating said conveyor device and/or closing the inflow (4) and/or outflow (5) and evacuating said inflow (4) and/or outflow (5) such that, in the region of the tool being cooled, an at least negligible level of negative pressure prevails in the inflow line (9) and/or in the outflow line (12).

In an electrode chip attachment device, a guide member which is formed such that the guide member can be divided into a first half member and a second half member with a division surface that is passed though the communication hole and that is parallel to the axial direction and a coupling shaft serving as a separate mechanism which separates the first half member and the second half member from each other when the chip holder is pushed into the first tapered portion and the second tapered portion from the opposite side of the electrode chip and which passes the chip holder to the side of the electrode chip.

A welding torch with a welding electrode and a welding electrode holder is provided. One welding torch includes a securing mechanism and an insulated grip. The securing mechanism is configured to secure an exposed central portion of a welding rod bounded by flux covered first and second sides. The securing mechanism is also configured to make electrical contact with the central portion of the rod for arc welding with the first side. The insulated grip is configured to cover the second side of the welding rod.

A device and a method for contacting a welding wire in a welding torch includes at least two contact shells having a contact area for contacting the welding wire. In order to make the contact of the welding wire as constant and permanent as possible during the lifetime of a contacting device, the contact shells have a holding section and are arranged inside a sleeve to define a rotational axis, the sleeve being fastened to a nozzle pipe having an integrated pressure mechanism. The pressure mechanism is adapted to exert pressure on the contact shells. The sleeve includes a holding device for exerting a counter-force onto the contact shells. The welding wire is contacted in the contact area of the contact shells with a contact force.