Electric heating – Metal heating – By arc
Patent
1994-12-30
1997-12-23
Paschall, Mark H.
Electric heating
Metal heating
By arc
21912163, 21912184, 2191215, 21912152, B23K 2600, B23K 1000
Patent
active
057009899
ABSTRACT:
A welding torch which combines features of both laser and plasma-arc welding torches. A laser beam is directed by an objective lens so that it is co-linear with the central axis of a plasma-arc torch. The laser beam passes through a planar or conical cathode electrode placed at the bottom orifice of the torch. A coaxial hole having a diameter less than that of the laser beam is drilled into the cathode to allow the laser beam to pass through the cathode. A constricting nozzle is placed under the cathode, with the laser beam passing through the axis of the nozzle. As with a standard plasma-arc torch, a gas is forced through a chamber having the cathode and nozzle at its bottom end. As the cathode is heated by the laser radiation, the gas is ionized and a plasma-arc is formed. As the laser beam passes through the nozzle, it comes to a focus and interacts with the plasma-arc formed between the cathode and a workpiece. The resulting interactions between the plasma-arc and laser beam form a plasma-laser discharge which acts to additionally constrict the laser beam and plasma-arc and increase the energy density of the welding spot formed on the workpiece.
REFERENCES:
patent: 3872279 (1975-03-01), Fairbairn
patent: 3946332 (1976-03-01), Samis
patent: 4167662 (1979-09-01), Steen
patent: 4179599 (1979-12-01), Conrad
patent: 4377735 (1983-03-01), Minamida et al.
patent: 4390774 (1983-06-01), Steen et al.
patent: 4507540 (1985-03-01), Hamasaki
patent: 4649256 (1987-03-01), Minamida et al.
patent: 4680770 (1987-07-01), Bell et al.
patent: 4689466 (1987-08-01), Hoshinouchi et al.
patent: 4689467 (1987-08-01), Inoue
patent: 5122632 (1992-06-01), Kinkelin
patent: 5131941 (1992-07-01), Lemelson
patent: 5247155 (1993-09-01), Steen et al.
Welding Handbook (American Welding Society), vol. 2, 8th Edition, "Welding Processes," Chapter 10, entitled `Plasma Arc Welding,` pp. 330-350.
Welding Handbook (American Welding Society), vol. 2, 8th Edition, "Welding Processes," Chapter 16, entitled `Laser Beam and Water Jet Cutting,` pp. 502-529.
Welding Handbook (American Welding Society), vol. 2, 8th Edition, "Welding Processes," Chapter 22, entitled `Laser Beam Welding,` pp. 714-738.
Dykhno Igor S.
Ignatchenko Georgi M.
Krivtsun Igor U.
Friedman Mark M.
Paschall Mark H.
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