Abstract: An arc welding apparatus comprises a conductor tube defining an internal passageway is disclosed. The conductor tube further defines an external surface profile and a distal end portion. The conductor tube is configured to engage a sleeve having inner and outer surface profiles. The inner surface profile is configured to abut the external surface profile of the conductor tube, and the outer surface profile comprises an engaging portion.

Abstract: A mock welding unicoupon for a virtual welding system includes a first exterior surface and a second exterior surface perpendicular to the first exterior surface. The first exterior surface and the second exterior surface together provide a plurality of grooves configured for simulation of a plurality of different types groove welds on the mock welding unicoupon. A curved exterior surface is configured for simulation of a pipe fillet weld on the mock welding unicoupon. A magnet source is configured to generate a magnetic field around the mock welding unicoupon for tracking movements of a mock welding tool with respect to the mock welding unicoupon.

Abstract: A self-adjusting liner assembly for a welding torch includes an elongated tubular body having a forward end, a rearward end, and a central bore extending from the forward end to the rearward end. An elongated fixed tube is mounted in the bore. The assembly further includes an elongated tubular slide having an inner end, an outer end, and a shoulder proximate the outer end. The fixed tube is received in the inner end of the slide, and the slide cooperates with the fixed tube in a telescoping relationship in the bore. A resilient member is disposed in the bore and envelopes a portion of the fixed tube and the slide. The resilient member engages the shoulder of the slide and urges the slide away from the fixed tube and toward the forward end of the body.

Abstract: The invention described herein generally pertains to a variably radiused curvilinear gooseneck nozzle for a welding torch.

Abstract: The present disclosure relates to a wire guiding liner, in particular a welding wire liner, having a plurality of guiding bodies which are pivotable with respect to each other around a defined pivot axis. At least one biasing device is provided which acts between adjacent guiding bodies so as to push them apart while still allowing the liner to bend under pressure.

Abstract: A contact tip for a welding gun having a central passage for a welding wire moving in a given direction toward a workpiece and receiving a welding signal by contact of the wire with the tip. The passage has an innermost end, an outermost exit end and a length. An opening in the contact tip intersects the passage so a pressure block slidably mounted in the opening is biased toward the wire by a spring around the contact tip urging the block against the wire. This tip is dimensioned and constructed to perform pulse welding by a relatively ductile wire.

Abstract: A contact tip for a welding gun having a central passage for a welding wire moving in a given direction toward a workpiece and receiving a welding signal by contact of the wire with the tip. The passage has an innermost end, an outermost exit end and a length of at least 1.5 inches and an opening in the contact tip intersects the passage so a pressure block slidably mounted in the opening is biased toward the wire by a spring around the contact tip urging the block against the wire. This tip is dimensioned and constructed to perform pulse welding by a relatively ductile aluminum wire.

Abstract: A retaining head for a MIG welding device includes a contact tip mounting end, an opposite retaining head mounting end, and a throughbore extending from one of the ends to the other end. A deflector is disposed along the throughbore and is adjustable for imparting a bend in welding wire passing through the throughbore. The deflector provides a straight wire contour for the welding wire that is fed out of the welding torch, while maintaining sufficient contact force between the welding wire and the contact tip. The deflector also reduces the effect of wire twist on the contact point between the welding wire and the contact tip.

Abstract: A contact tip for a welding torch includes a body having a front discharge end, an opposite rear feed end, and a bore extending through the body. A cap is mounted on the body at the front end. The cap has an aperture generally aligned with the bore. The cap is composed of a material having an electrical conductivity between 1.74×107 and 4.35×107 Siemens per meter at 20° C. The body is composed of a material selected from the group consisting of copper and a copper alloy. The body has an electrical conductivity that is higher than the electrical conductivity of the cap. A portion of the bore at the front end of the body and at least a portion of the aperture in the cap define a contact area for a consumable electrode wire.

Abstract: A contact tip for a welding torch in accordance with the present invention includes an elongated, generally cylindrical body having a front contact end and an opposite rear retaining end. A central aperture is defined by an inner wall of the body. The aperture extends through the body from an opening at the rear retaining end to an opening at the front contact end. The aperture has a front portion and a wider diameter portion adjacent the front portion. The front portion generally has a length that is shorter than a length of the wider diameter portion. A consumable electrode wire fed through the aperture contacts the inner wall in the front portion but does not contact the inner wall in the wider diameter portion.

Abstract: A self-adjusting liner assembly for a welding torch includes an elongated tubular body having a forward end, a rearward end, and a central bore extending from the forward end to the rearward end. An elongated fixed tube is mounted in the bore. The assembly further includes an elongated tubular slide having an inner end, an outer end, and a shoulder proximate the outer end. The fixed tube is received in the inner end of the slide, and the slide cooperates with the fixed tube in a telescoping relationship in the bore. A resilient member is disposed in the bore and envelopes a portion of the fixed tube and the slide. The resilient member engages the shoulder of the slide and urges the slide away from the fixed tube and toward the forward end of the body.

Abstract: An improved liner for protecting an electrode wire within a body of a welding torch. The liner includes a liner retainer, which is removably coupled to a liner insert. The liner retainer is secured to a distal end of the welding torch and the liner insert is inserted and coupled to the liner retainer through a proximal end of the welding torch.