The invention relates to a device and a method for contacting a welding wire (13) in a welding torch (10), including at least two contact shells (31) having a contact area (32) for contacting the welding wire (13), and to a contact shell (31) for contacting a welding wire (13). 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 (31) have a holding section (48) and are arranged inside a sleeve (37) to define a rotational axis (43), the sleeve (37) being fastened to a nozzle pipe (38) having an integrated pressure mechanism (36), and the pressure mechanism (36) being adapted to exert pressure (33) on the contact shells (31). The sleeve (37) includes a holding device (42) for exerting a counter-force (34) onto the contact shells (31). The welding wire (13) is contacted in the contact area (32) of the contact shells (31) with a contact force (35).

An example wire liner retention apparatus includes: a body comprising a bore extending longitudinally through the body, the bore configured to permit passage of a welding wire liner through the bore; a clamp configured to apply a compressive force to the welding wire liner in a radial direction within the bore to limit movement of the welding wire liner with respect to the body; and a compression adjustment mechanism configured to adjust the compressive force applied by the clamp.

Some examples of the present disclosure relate to apparatus, systems, and/or methods for providing a quick connect and/or disconnect for a gas diffuser and/or neck assembly, for example, in a welding system. The gas diffuser may include threaded grooves and/or protrusions configured to engage with screw threads and/or channels of the neck assembly. The screw threads, protrusions, threaded grooves, and/or channels may be configured such that the gas diffuser may be quickly connected to, and/or disconnected from, the neck assembly.

Some examples of the present disclosure relate to apparatus, systems, and/or methods for providing a quick connect and/or disconnect for a gas diffuser and/or neck assembly, for example, in a welding system. The gas diffuser may include threaded grooves and/or protrusions configured to engage with screw threads and/or channels of the neck assembly. The screw threads, protrusions, threaded grooves, and/or channels may be configured such that the gas diffuser may be quickly connected to, and/or disconnected from, the neck assembly.

Disclosed example welding fume torches include: a handle having a grip section; a neck extending from a forward end of the handle; a fume collection nozzle in fluid communication with an interior of the handle; and a fume hose in fluid communication with the fume collection nozzle via the interior of the handle, the handle including a fume channel having a larger flow area than the grip section, having at least one dimension that is larger than a same dimension of at least one section of the handle forward of the fume channel, and configured to reduce flow resistance for fume between the fume collection nozzle and the fume hose, at least part of the fume channel being forward of the grip section.

A system and method of welding is provided where at least two welding electrodes are provided to and passed through a single orifice on a single contact tip and a welding waveform is provided to the electrodes through the contact tip to weld simultaneously with both electrodes.

A system and method of welding is provided where at least two welding electrodes are provided to and passed through a single orifice on a single contact tip and a welding waveform is provided to the electrodes through the contact tip to weld simultaneously with both electrodes.

A welding torch diffuser may comprise: a first section configured to be inserted into an interior of a welding torch neck and coupled to the welding torch neck; a second section configured to receive a contact tip; and a first interior surface extending from an end of the first section toward the second section, wherein: the welding torch diffuser defines an aperture between the first section and the second section, the second section is configured to align the contact tip with the aperture, and the first interior surface defines a first cavity configured to capture a welding wire liner positioned within the welding torch neck as the first section is inserted into the interior of the welding torch neck and align the welding wire liner with the aperture.