A welding or additive manufacturing wire drive system includes a first spindle for a first welding wire spool, a second spindle for a second welding wire spool, a first drive roll, and a second drive roll. One or both of the drive rolls has a circumferential groove. A first welding wire and a second welding wire are located between the first drive roll and the second drive roll in the circumferential groove. The first welding wire contacts the second welding wire between the first drive roll and the second drive roll. The first welding wire further contacts a first sidewall portion of the circumferential groove. The second welding wire further contacts a second sidewall portion of the circumferential groove. Both of the first welding wire and the second welding wire are radially offset from a central portion of the circumferential groove.

A cooled welding torch (1) having a cooling circuit, which cooling circuit extends via a nozzle fitting receiver (3) into a gas nozzle (9), and the gas nozzle (9) is attachable to the welding torch (1) by a defined turn, wherein the cooling circuit is routed through a redirecting element (5), which redirecting element (5) is positioned above the nozzle fitting receiver (3) and may be turned together with the gas nozzle (9), wherein a path of the cooling circuit is switchable by the position of the gas nozzle (9).

Disclosed is a flexible TIG welding torch having a torch body for performing an angle adjustment of a torch head with respect to a torch handle, wherein the torch body includes: a multi-array spiral wires having both ends connected to the torch head and the torch handle; a first protective sleeve supported in contact with outer sides of the wires and organized as a mesh structure; a second protective sleeve laminated as a mesh structure on an outer side of the first protective sleeve, and bonded onto an inner surface of a clad body of the torch body; and an adhesive layer impregnated into the mesh structures of the first and second protective sleeves to fix the first and second protective sleeves to each other, and support compressive and tensile stresses formed in the first and second protective sleeves.

An arc welding apparatus includes: a detector configured to detect whether it is in a short state or an arc state between a consumable electrode and a welded article; a feed adjuster configured to apply a forward feed for feeding the consumable electrode when the arc state is detected and apply a reverse feed for feeding the consumable electrode when the short state is detected; a determiner configured to determine whether or not a predetermined period has elapsed after the detector has detected the short state; and an instructor configured to instruct the feed adjuster to continue the reverse feed even when the arc state is detected, until the determiner determines that the predetermined period has elapsed.

Systems, methods, and apparatus to preheat weld wire are disclosed. An example welding torch includes a first contact tip configured to conduct welding current to a consumable electrode, a second contact tip configured to conduct preheating current to the consumable electrode, and a plurality of liquid cooling assemblies configured to conduct the preheating current and to conduct the welding current to the consumable electrode.

A handheld welding torch for electric-arc welding with a melting welding wire has a wire feed unit for conveying the welding wire along a conveying axis arranged within a torch housing with a handle region, the wire feed unit including a drive unit with a rotation axis arranged vertically with respect to the conveying axis of the welding wire, a drive roller with a rotation axis and a counter roller with a rotation axis, and having a torch push-button. The wire feed unit has a gear stage and the rotation axis of the drive unit is arranged aligning with the conveying axis of the welding wire.

A handheld welding torch for electric-arc welding with a melting welding wire has a wire feed unit for conveying the welding wire along a conveying axis arranged within a torch housing with a handle region, the wire feed unit including a drive unit with a rotation axis arranged vertically with respect to the conveying axis of the welding wire, a drive roller with a rotation axis and a counter roller with a rotation axis, and having a torch push-button. The wire feed unit has a gear stage and the rotation axis of the drive unit is arranged aligning with the conveying axis of the welding wire.

A rotating arc sensor is provided. The rotating arc sensor includes a motor, a connecting rod for driving a welding gun to perform an annular movement, a sliding assembly for supporting a weight of the connecting rod and supporting a free movement of a first end of the connecting rod, and an eccentric oscillating member for driving a second end of the connecting rod to perform the annular movement, wherein a center of a rotating shaft of the motor is provided with a hollow cavity capable of communicating with both ends of the motor, the sliding assembly is disposed at a top end of the motor, and the first end of the connecting rod protrudes out of the top end of the motor through the hollow cavity and is connected with the sliding assembly. The eccentric oscillating member includes a first flange and a second flange.

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).