A plasma arc torch includes a nozzle body, a nozzle extending from the nozzle body, and a shield cap. An outer retaining cap is attached to the plasma arc torch and secures the shield cap to the plasma arc torch. A sleeve is located radially outward from the outer retaining cap and is configured to receive a flow of pressurized gas. An insulator is located between the outer retaining cap and the sleeve. At least one of the sleeve and the insulator forms a gas flow channel configured to direct a gas flow from the sleeve to a distal portion of the outer retaining cap.

Some examples of the present disclosure relate to welding systems that provide cooling gas flow to contact tips. The contact tip may be retained within a neck and nozzle assembly of a welding torch that receives gas, such as shielding gas, for example, from the welding system. A tip retention-device and gas diffuser may cooperate to retain the contact tip within the neck and nozzle assembly. The gas diffuser may have axial gas channels configured to direct the shielding gas over and/or across a rear portion of the contact tip seated within the gas diffuser. The tip retention device may have gas channels configured to guide gas flow from the gas diffuser over and/or across a forward portion of the contact tip. The gas flow may help to cool the contact tip before, during, and/or after welding, which may extend the life of the contact tip.

A welding or metal additive manufacturing torch includes a nozzle and a shielding gas diffuser located within the nozzle. The shielding gas diffuser has a plurality of shielding gas discharge holes spaced annularly around the shielding gas diffuser. A contact tip extends from the shielding gas diffuser distal of the shielding gas discharge holes. An annular screen extends radially between the nozzle and one or both of the contact tip and the shielding gas diffuser and is located distal of the shielding gas discharge holes. The annular screen is electrically insulated from at least one of the shielding gas diffuser and the nozzle.

A method of build-up welding a powdery or wire-shaped material onto a workpiece, which is preferably a flat substrate, by means of a device which comprises a substantially rod-shaped electrode, the electrode having at least one material feed channel extending in its interior, the device comprising a nozzle surrounding the electrode, the method comprising the following steps: forming the arc as a transferred arc between the electrode and the workpiece or as a free-standing arc between the electrode and the nozzle, flooding the working gas area with a working gas to constrict the arc in the direction of the workpiece, feeding the powdery or wire-shaped material into the constricted arc and moving the device across the workpiece as the powdery or wire-shaped material is being fed into the constricted arc.

One aspect of the present disclosure provides a welding torch that performs arc welding when electric power is supplied from a welding power supply device. The welding torch includes a sensor unit that detects inclination information regarding the welding torch, a welding information acquiring unit that acquires welding information suitable for the inclination information detected by the sensor unit, and a communication unit that sends the welding information acquired by the welding information acquiring unit to the welding power supply device.

Connecting parts for a processing head for thermal material processing, comprises a body that extends along a longitudinal axis having an outer face, an inner face, a front end, and a rear end; and the inner face or the outer face has a slot, extending in the circumferential direction, with each slot having a slot depth and a slot bottom, wherein the slot bottom exhibits, around the circumference, different distances extending through the longitudinal axis and perpendicularly to the longitudinal axis between the opposite portions of the slot bottom, and one inner face or outer face exhibits, around the circumference, different distances, extending through the longitudinal axis and perpendicularly to the longitudinal axis, between the opposite portions of the inner face or outer face.

A welding device according to some embodiments includes a rotary table fixing two irregular shaped plates which are overlapped, a torch unit including a welding torch positioned to face outer peripheral edges of the two irregular shaped plates fixed to the rotary table, a torch actuator configured to move the welding torch toward and away from the outer peripheral edges, an after-shielding part mounted to the welding torch on downstream side in a rotational direction of the rotary table and having nozzles arranged along the rotational direction, configured to jet shielding gas to the outer peripheral edges, and including a first nozzle positioned upstream and a second nozzle positioned downstream of the first nozzle in the rotational direction, and a controller configured to control an orientation of the nozzle in a direction of decreasing a shielding-gas-jetting distance between the second nozzle and the outer peripheral edges welded by the welding torch.

A welding gun includes a gun assembly including a handle having a cable receiving end and also a connecting end. The connecting end includes a tubular end fitting having female threads proximal to the connecting end, and also having an aperture adjacent the female threads. A neck assembly includes a body tube having a welding end and also a connecting end. The connecting end of the body tube is telescopically engageable with the tubular end fitting. The connecting end of the body tube includes an annular recess inwardly spaced from a terminus of the connecting end, and also includes a locking nut and male threads engageable with the female threads. The locking nut and male threads are disposed adjacent the annular recess away from the terminus. A stop is fitable in the aperture and extends into the annular recess in an assembled disposition of the gun.

According to an aspect of the present disclosure, a heat processing torch is provided. The heat processing torch includes a sensor unit and a notification unit. The sensor unit detects a temperature at a predetermined position of the heat processing torch. The notification unit reports information, and gives notification of the temperature detected by the sensor unit.

Some examples of the present disclosure relate to welding systems that provide cooling gas flow to contact tips. The contact tip may be retained within a neck and nozzle assembly of a welding torch that receives gas, such as shielding gas, for example, from the welding system. A tip retention-device and gas diffuser may cooperate to retain the contact tip within the neck and nozzle assembly. The gas diffuser may have axial gas channels configured to direct the shielding gas over and/or across a rear portion of the contact tip seated within the gas diffuser. The tip retention device may have gas channels configured to guide gas flow from the gas diffuser over and/or across a forward portion of the contact tip. The gas flow may help to cool the contact tip before, during, and/or after welding, which may extend the life of the contact tip.