Mig gun nozzle with reduced cross sectional area at the front

Details Mig gun nozzle with reduced cross sectional area at the front Mig gun nozzle with reduced cross sectional area at the front

B - Operations, Transporting

23

K

B23K 9/29 (2006.01) B23K 9/16 (2006.01) B23K 9/173 (2006.01)

Patent

CA 2366724

A MIG welding gun has a diffuser with an external thread and a frusto-conical back ramp. A nozzle assembly includes an insert with a back ramp and a thread that mates with the diffuser thread. The threads of the diffuser and insert have respective ramps that mate. A single turn of the nozzle assembly on the diffuser causes simultaneous engagement of the insert and diffuser back ramps and of the insert and diffuser thread ramps. Such engagement centers the nozzle to be concentric with the diffuser and also produces a wedging action that retains the nozzle assembly on the diffuser until a relatively substantial reverse torque is applied to the nozzle assembly. The nozzle front end has a narrow annulus, which reduces the amount of radiant heat from the welding arc that reaches the nozzle.

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