A welding torch includes a first terminal zone provided with a welding electrode and a conveyor element associated with the electrode. The torch includes a first body connected to the electrode through a first conductor element and a second body connected to the conveyor element through a second conductor element. The torch includes a delivery way suited to convey a cooling fluid towards the first terminal zone and a return way for the cooling fluid coming from the terminal zone. One of the delivery way and the return way passes through the first body and the second body. It includes a tubular element made of an electrically insulating material having a first end inserted in a seat provided in the first body and a second end inserted in a seat provided in the second body.

A torch head for a liquid-cooled plasma arc torch is provided. The torch head includes a torch body and a torch insulator, coupled to the torch body, having a substantially non-conductive insulator body. The torch insulator includes (i) a first liquid coolant channel, disposed within the insulator body, configured to conduct a fluid flow from the torch head into a consumable cartridge along a first preexisting flow path, (ii) a first liquid return channel, disposed within the insulator body, configured to return at least a portion of the fluid flow from the cartridge to the torch head along the first preexisting flow path, and (iii) a gas channel, disposed within the insulator body, configured to conduct a first gas flow from the torch head to the cartridge along a second preexisting flow path. The first and second preexisting flow paths are fluidly isolated from each other.

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.

A torch for performing TIG welding is disclosed. In accordance with at least one embodiment of the present invention, the torch includes a torch body having a cavity configured to receive and support an electrode assembly, a first shield gas channel, and a second shield gas channel. The first shield gas channel extends from an external surface of the torch body to a first plenum that is fluidly coupled to the cavity so that the first shield gas channel is configured to direct a first shield gas into the cavity. The first plenum is defined, at least in part, by the cavity and is disposed radially exterior of a portion of the electrode assembly. The second shield gas channel is configured to direct a second shield gas to exit the torch body along a path that that is radially exterior of the cavity.

A jacketed consumable cartridge is provided for a liquid cooled plasma arc torch. The jacketed consumable cartridge comprises an electrode, a swirl ring securely affixed to and disposed circumferentially about a distal end of the electrode, and a nozzle securely affixed to the swirl ring, the nozzle disposed circumferentially about the distal end of the electrode with a portion of the swirl ring located therebetween. The cartridge also comprises a cartridge jacket securely affixed to and disposed circumferentially about a distal end of the nozzle and a shield securely affixed to and disposed circumferentially about a distal end of the cartridge jacket. A proximal end of the cartridge jacket is adapted to extend (i) axially past a proximal end of the shield and (ii) radially beyond a radial extent of the shield.

The invention relates to a pair of two nozzle assembly receptacles (14, 15) for a dual-wire welding torch (1) for two melting welding wires (2, 3), having a torch body (4), a connection (5) for a hose package (6), and having a common gas nozzle (11) and to a dual-wire welding torch (1) with a pair of two nozzle assembly receptacles (14, 15) are constructed as inserts for accommodating and fastening in interfaces (12, 13) in the torch body (4) provided therefor, and the nozzle assembly receptacles (14, 15) respectively have an opening (16, 17) for the accommodation of a nozzle assembly (7, 8) in each case, which openings (16, 17) are arranged at an angle (α) between 0° and 20° to one another, so that the central axes (a, b) of the contact tubes (9, 10) or the welding wires (2, 3) running therein enclose this angle (α) to one another.

A MIG/MAG welding torch body includes a second channel, which is arranged coaxially to the central channel, and a further third channel, which is arranged coaxially to the second channel, wherein a connection is provided between the second channel and the third channel. The first channel has an orifice in the center of the receiving part, the second channel has an orifice on the lateral side of the receiving part, and the third channel has an orifice on the lateral side of the receiving part.

A TIG (Tungsten Inert Gas) welding torch (10) comprises a torch body (22), a collet (38a,b,c) for retaining a tungsten rod, and a back cap (42), in which the collet 838a,b,c) passes through an aperture in the torch body (22) from the front of the torch body (22) to the rear of the torch body (22), and is joined directly to the back cap (42) by a screw thread (40a,b,c), the collet (38a,b,c) being drawn backwards against a front section of the torch body (22), to close the collet (38a,b,c) and retain the tungsten rod when the screw thread (40a,b,c) is tightened.

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.

A pair of two nozzle assembly receptacles for a dual-wire welding torch for two melting welding wires, has a torch body, a connection for a hose package, and a common gas nozzle, and a dual-wire welding torch has a pair of two nozzle assembly receptacles constructed as inserts for accommodating and fastening in interfaces in the torch body provided therefor, and the nozzle assembly receptacles respectively have an opening for the accommodation of a nozzle assembly in each case, which openings are arranged at an angle between 0° and 20° to one another, so that the central axes of the contact tubes or the welding wires running therein enclose this angle to one another.