An arc welding power supply supplies power to a welding wire functioning as a discharge electrode to generate an arc from an electrode distal end of the welding wire and perform arc welding on a welded article. The arc welding power supply includes an output control unit that adjusts the power supplied to the welding wire to a power value suitable for arc welding. A feed control unit cyclically changes a feeding speed of the welding wire. The feeding speed includes a forward feeding speed and a rearward feeding speed. An amplitude control unit cyclically changes an amplitude of the feeding speed of the welding wire to cyclically vary an average arc length.

A welding torch having a nozzle assembly with multiple attachment methods is disclosed. The nozzle assembly includes a nozzle shell, an electrically insulating sleeve, and a nozzle insert. The nozzle insert is configured for attachment to gas diffuser assemblies with different attachment mechanisms (e.g. a slip-on mechanism relying on frictional force, and/or screw-on mechanism relying on torque).

A welding torch having a nozzle assembly with multiple attachment methods is disclosed. The nozzle assembly includes a nozzle shell, an electrically insulating sleeve, and a nozzle insert. The nozzle insert is configured for attachment to gas diffuser assemblies with different attachment mechanisms (e.g. a slip-on mechanism relying on frictional force, and/or screw-on mechanism relying on torque).

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.

To provide a compact welding torch in which a motor can be easily replaced, in which, when a motor capable of high-speed welding is used for a long time in a high current region, heat generated by the motor can be sufficiently cooled, and in which the motor can be protected from spatters or the like.

A first cooler that cools a first side surface of a motor parallel to a shaft of the motor and a second cooler that cools a second side surface of the motor different from the first side surface are included. The first cooler has a first inflow port and a first outflow port for a cooling fluid, and a first flow passage that connects the first inflow port and the first outflow port. The second cooler has a second inflow port and a second outflow port for the cooling fluid, and a second flow passage that connects the second inflow port and the second outflow port. The first outflow port and the second inflow port open in a direction crossing the shaft of the motor and are connected to each other directly or indirectly.

A nozzle assembly for a welding torch, a welding torch that includes said nozzle assembly, and a method of using the welding torch is provided. The nozzle assembly generally comprises an insulator having a plurality of grooves around an outer periphery, a plurality of sealing members disposed within the grooves of the insulator; and a nozzle body slip-fit around the insulator, such that at least one of the insulator and the nozzle body define position indicia.

A welding wire feeder including an alignment tongue and groove connection between a clamp arm and a welding drive assembly housing is provided. In certain embodiments, an alignment tongue extends from an end of the clamp arm opposite a pivot point about which the clamp arm rotates relative the assembly housing. A corresponding alignment groove may be formed in the assembly housing to receive the alignment tongue when the clamp arm is rotated such that a drive wheel mounted on the clamp arm contacts a drive wheel mounted on the assembly housing. In addition, a tensioner may be pivoted into a groove in the clamp arm to transfer a compressive force through the clamp arm, forcing the drive wheels together. The alignment tongue and groove may reduce lateral displacement of the clamp arm relative to the assembly housing that may be caused by a force transferred to the clamp arm as the tensioner is pivoted.

A torch for connection to an electric arc welding system having a wire feeder, a power source and a weld process controller for the power source. The torch being connected to the front end of a welding gun, which gun has a rear end with a first unique component of a connector. The welding system has a second component of the connector matching the first component. The gun has a communication channel extending from the torch to the first component for transmitting data to the welding system through the connector. The torch has a memory with an identification code outputted on the communication channel to the first component and the system has a decoder circuit connected to the second component and responsive to a selected identification code.

A torch for connection to an electric arc welding system having a wire feeder, a power source and a weld process controller for the power source. The torch being connected to the front end of a welding gun, which gun has a rear end with a first unique component of a connector. The welding system has a second component of the connector matching the first component. The gun has a communication channel extending from the torch to the first component for transmitting data to the welding system through the connector. The torch has a memory with an identification code outputted on the communication channel to the first component and the system has a decoder circuit connected to the second component and responsive to a selected identification code.

A first aspect of the present disclosure provides a thermal processing torch. The thermal processing torch includes an operation portion, a display portion, a sensor portion, a communications portion, and a control portion. The operation portion has an operation button. The display portion has a display screen. The sensor portion detects inclination information. The communications portion transmits a signal. The control portion causes the communications portion to transmit a signal based on an input from the operation portion. The control portion causes the display screen to display a menu screen for selecting a desired screen among a plurality of screens based on the inclination information detected by the sensor portion.