Electric heating – Metal heating – By arc
Patent
1991-08-05
1993-11-02
Paschall, Mark H.
Electric heating
Metal heating
By arc
219 75, 21912151, 21913763, 21912145, B23K 1000, B23K 900
Patent
active
052585999
ABSTRACT:
In a convertible TIG, MIG or plasma arc welding system, a cylindrical docking body mountable in a socket at a welding station, has utilities passages therethrough for receiving an elongated metal electrode, shielding and plasma gases, welding potential and cooling water. The electrode passage is threaded at one end to interchangeably mount any of a plurality of electrode feed assemblies for consumable wire or tungsten electrodes. An output fixture is mounted at the other end of the body to receive the electrode and the plasma or shielding gas and pass them from the body. A nozzle assembly is removably mountable on the other end of the docking body in surrounding relationship with the output fixture and the associated tip assembly and communicates with the shielding gas passage for passing shielding gas to the working end of the nozzle. The docking body has internal channels among the passages so as to circulate cooling water through both the output fixture and the nozzle assembly. The working end of the nozzle assembly interchangeably mounts any of a plurality of gas directing assemblies for directing gases relative to the arc. The system can be converted among TIG, MIG and plasma arc welding by simply changing the electrode feed assembly, the tip assembly and the gas directing assembly. Alternatively, the entire nozzle assembly can be replaced with one designed for TIG or MIG welding.
REFERENCES:
patent: 4582979 (1986-04-01), Moerke
patent: 4600824 (1986-07-01), Moerke
patent: 4645901 (1987-02-01), Scholz et al.
patent: 4939339 (1990-07-01), Folkening et al.
D/F Machine Specialties, Inc. Instruction Manual 89-70 for "TIG" Welding Products.
Linde Air Products Catalog page for PT-8 Plasma Torch.
Airco manual for Electrode Adjustment Attachment Model HMA-B.
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