A replaceable or quick-change liner for use in a welding torch assembly that includes a liner guide, a section of liner, and a sealing feature for creating a pneumatic seal between the replaceable liner and the welding torch assembly.

A welding torch (18) for a welding system (10) includes a substantially spherical main body (20) that has an integrated coolant chamber (60) which is in fluid communication with at least one coolant port (62). The substantially spherical main body (20) is a joint head (22) of a ball joint (24) of the welding system (10). A welding system (10) includes a torch bracket (16) and the welding torch (18). The torch bracket (16) has a socket (26, 28) of a ball joint (24), and the socket (26, 28) receives the substantially spherical main body (20) of the welding torch (18) in a spherically orientable manner thereby forming the ball joint (24).

A gas metal arc welding system for a robotic arm includes a j-arm, a power block, and a bolt. The j-arm has a first end and a second end each having a through hole. The power block has a first opening defining a first passageway along a longitudinal axis and a second opening defining a second passageway substantially along an axis perpendicular to the longitudinal axis. The bolt has a threaded portion configured to extend through the first opening of the j-arm and into the second passageway of the power block, wherein the bolt retains the j-arm to the power block. The threaded portion of the bolt comprises an internal passageway that extends through a longitudinal axis of the bolt, wherein the internal passageway of the bolt and the first and second passageways of the power block are in fluid communication with each other.

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.

Methods and apparatus to provide a consistent electrode state for welding. an example welding-type system includes: a first wire drive to feed an electrode wire through a welding torch; a bidirectional assisting wire drive to advance the electrode wire from a wire supply to the first wire drive; a tension-compression detector to detect a first tension-compression state of the electrode wire; and one or more motor controllers to control the first wire drive and the assisting wire drive to put the electrode wire in a predetermined position relative to the welding torch by: controlling the first wire drive to hold the electrode wire; and controlling the assisting wire drive to advance or retract the electrode wire based on the first tension-compression state to put the electrode wire in a second tension-compression state.

In various embodiments, three-dimensional layered metallic parts are substantially free of gaps between successive layers, are substantially free of cracks, and have densities no less than 97% of the theoretical density of the metallic material.

A nozzle assembly for a welding torch is disclosed. The nozzle assembly comprises a nozzle, a contact tip, and a gas diffuser assembly. The gas diffuser assembly comprises a gas diffuser, coupled to an insulator. The gas diffuser is also coupled to a gooseneck and the contact tip. The nozzle is coupled to the gas diffuser assembly, such that the contact tip is retained within the nozzle. The nozzle and gas diffuser assembly further include complementary engagement features to couple the nozzle to the gas diffuser assembly. The nozzle also includes a spatter deflector configured to deflect or block spatter from obstructing gas holes of the gas diffuser assembly.

A method and apparatus for providing welding type power includes a phase shifted double forward converter having a first and second converter with a controller and an output rectifier. The output rectifier has at least one cathode current path that creates a cathode magnetic field when current flows in the cathode current path. The output rectifier also has at least one anode current path that creates an anode magnetic field when current flows in the anode current path. The cathode current path is disposed and oriented and the anode current path is disposed and oriented such that the cathode magnetic field acts to at least partially cancel the anode magnetic field.

The present disclosure is directed to systems and methods for pretreating a wire that is used in a welding operation to reduce the amount of hydrogen introduced into a weld. Using embodiments of the systems and methods disclosed herein, one passes a wire through a pre-treatment chamber in which a wire is treated to release hydrogen and/or other contaminants, and provides a gas flow through the pre-treatment chamber so that the contaminants that are released from the wire are taken up by the gas. The gas exiting the pre-treatment chamber may be isolated from the shielding gas utilized during a welding operation. For instance, the pretreatment gas may be directed away from the distal end of the welding torch, thereby preventing released contaminants from being transported into a weld.

The present disclosure is directed to systems and methods for pretreating a wire that is used in a welding operation. Using embodiments of the systems and methods disclosed herein, one may remove hydrogen and/or other contaminants from a wire by passing the wire through a pre-treatment chamber, preferably one that isolates the gas discharged from the pre-treatment chamber from the shielding gas utilized in the welding operation; treating the wire within the pre-treatment chamber to release hydrogen and/or other contaminants; and creating a turbulent flow of gas through the pre-treatment chamber. By creating a turbulent flow of gas within the pre-treatment chamber, the transportation of the released hydrogen and/or other contaminants away from the wire may be improved, thereby preventing released contaminants from being reintroduced to the wire or otherwise transported into a weld.