Method and apparatus for a contact start plasma cutting process

Details Method and apparatus for a contact start plasma cutting process Method and apparatus for a contact start plasma cutting process

1998-07-29

2000-04-25

Paschall, Mark

Electric heating

Metal heating

By arc

21912155, 21912154, 21912157, B23K 1000

Patent

active

060546700

ABSTRACT:
An plasma cutter, including a power supply, a cutting torch (with a nozzle), a source of air and a valve, is disclosed. The cutting torch is connected to the two power source outputs (cathode and anode). Air is supplied to the nozzle through the valve from the air supply. In one position the valve allows air to flow from the air source to the nozzle. In a second position the valve prevents air from flowing from the air supply to the nozzle and also vents the nozzle and torch. The torch has a movable electrode and the nozzle is in a fixed position. The nozzle and electrode are each electrically connected to a different one of the power outputs. The electrode is biased (preferably by a spring) to be in contact with the nozzle. However, air flowing into the torch and electrode overcomes the bias and moves the electrode away from the nozzle. If the arc is absent and the user desires current, then the valve is moved to prevent air from flowing into the torch and to vent the torch. Also, the valve is moved to provide air flow (thus purging the torch) when the power supply is powered up.

REFERENCES:
patent: 3004189 (1961-10-01), Giannini
patent: 3242305 (1966-03-01), Kane et al.
patent: 3619758 (1971-11-01), Deranian
patent: 3641308 (1972-02-01), Couch et al.
patent: 4417130 (1983-11-01), Banba et al.
patent: 4425493 (1984-01-01), Mizuno et al.
patent: 4438317 (1984-03-01), Ueguri et al.
patent: 4567346 (1986-01-01), Marhic
patent: 4752445 (1988-06-01), Zell
patent: 4780591 (1988-10-01), Bernecki et al.
patent: 4788408 (1988-11-01), Wlodarczyk et al.
patent: 4791268 (1988-12-01), Sanders et al.
patent: 4803610 (1989-02-01), Gulczynski
patent: 4814577 (1989-03-01), Dallavalle et al.
patent: 4896016 (1990-01-01), Broberg et al.
patent: 4902871 (1990-02-01), Sanders et al.
patent: 5070227 (1991-12-01), Luo et al.
patent: 5164569 (1992-11-01), Porra et al.
patent: 5208441 (1993-05-01), Broberg
patent: 5235162 (1993-08-01), Nourbakhsh
patent: 5506384 (1996-04-01), Yamaguchi
patent: 5660745 (1997-08-01), Naor
patent: 5796067 (1998-08-01), Enyedy et al.
patent: 5828030 (1998-10-01), Naor
patent: 5844196 (1998-12-01), Oakley

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