Process for operating a plasma arc torch

Details Process for operating a plasma arc torch Process for operating a plasma arc torch

1998-10-23

2000-12-19

Walberg, Teresa

Electric heating

Metal heating

By arc

21912157, B23K 900

Patent

active

061630098

ABSTRACT:
A process for operating a plasma arc torch on shut down includes decreasing current to the electrode from its initial operational value Io to a lesser intermediate value Im in a ramping function between times t1 and t2. Gas pressure within the plasma gas chamber is controlled between times t1 and t2 so that the gas pressure decreases from its operational value Po to a lesser intermediate value Pm substantially concurrently with the decreasing of current between times t1 and t2 and at a controlled rate such that plasma gas flow rate through the nozzle is maintained at least about its operational level Fo or greater between times t1 and t2. At time t2, current is shut off to the electrode.

REFERENCES:
patent: 2906858 (1959-09-01), Morton, Jr.
patent: 3082314 (1963-03-01), Arata et al.
patent: 3131288 (1964-04-01), Browning
patent: 3204076 (1965-08-01), Browning
patent: 3242305 (1966-03-01), Kane et al.
patent: 3272962 (1966-09-01), Mauskapf
patent: 3373306 (1968-03-01), Karlovitz
patent: 3403211 (1968-09-01), Foex
patent: 3476906 (1969-11-01), Rovan
patent: 3534388 (1970-10-01), Takakiyo et al.
patent: 3536885 (1970-10-01), Mitchell
patent: 3541297 (1970-11-01), Sunnen et al.
patent: 3567898 (1971-03-01), Fein
patent: 3575568 (1971-04-01), Tateno
patent: 3588594 (1971-06-01), Yamamoto et al.
patent: 3601578 (1971-08-01), Gebel et al.
patent: 3619549 (1971-11-01), Hogan et al.
patent: 3641308 (1972-02-01), Couch, Jr. et al.
patent: 3643580 (1972-02-01), Siegel
patent: 3644782 (1972-02-01), Sheer et al.
patent: 3770935 (1973-11-01), Tateno et al.
patent: 3787247 (1974-01-01), Couch, Jr.
patent: 3833787 (1974-09-01), Couch, Jr.
patent: 3914573 (1975-10-01), Muehlberger
patent: 3949188 (1976-04-01), Tateno
patent: 3988566 (1976-10-01), Vogts et al.
patent: 4029930 (1977-06-01), Sagara et al.
patent: 4060088 (1977-11-01), Morrison, Jr. et al.
patent: 4133987 (1979-01-01), Lakomsky et al.
patent: 4163891 (1979-08-01), Komatsu et al.
patent: 4174477 (1979-11-01), Essers et al.
patent: 4195216 (1980-03-01), Beauchamp et al.
patent: 4203022 (1980-05-01), Couch, Jr. et al.
patent: 4275287 (1981-06-01), Hiratake
patent: 4282418 (1981-08-01), Wuestner
patent: 4291217 (1981-09-01), Braun
patent: 4341941 (1982-07-01), Tateno
patent: 4361748 (1982-11-01), Couch, Jr.
patent: 4382170 (1983-05-01), Klingel
patent: 4389559 (1983-06-01), Rotolico et al.
patent: 4410788 (1983-10-01), Summers et al.
patent: 4421970 (1983-12-01), Couch, Jr.
patent: 4506136 (1985-03-01), Smyth et al.
patent: 4521666 (1985-06-01), Severance, Jr. et al.
patent: 4567346 (1986-01-01), Marhic
patent: 4625094 (1986-11-01), Marhic et al.
patent: 4626648 (1986-12-01), Browning
patent: 4645899 (1987-02-01), Bebber et al.
patent: 4647082 (1987-03-01), Fournier et al.
patent: 4663512 (1987-05-01), Kneeland et al.
patent: 4692582 (1987-09-01), Marhic
patent: 4701590 (1987-10-01), Hatch
patent: 4743734 (1988-05-01), Garlanov et al.
patent: 4748312 (1988-05-01), Hatch et al.
patent: 4762977 (1988-08-01), Browning
patent: 4764656 (1988-08-01), Browning
patent: 4782210 (1988-11-01), Nelson et al.
patent: 4791268 (1988-12-01), Sanders et al.
patent: 4816637 (1989-03-01), Sanders et al.
patent: 4861962 (1989-08-01), Sanders et al.
patent: 4866240 (1989-09-01), Webber
patent: 4882465 (1989-11-01), Smith et al.
patent: 4902871 (1990-02-01), Sanders et al.
patent: 4909914 (1990-03-01), Chiba et al.
patent: 4918283 (1990-04-01), Yamade et al.
patent: 5013885 (1991-05-01), Carkhuff et al.
patent: 5017752 (1991-05-01), Severance, Jr. et al.
patent: 5023425 (1991-06-01), Severance, Jr.
patent: 5070227 (1991-12-01), Luo et al.
patent: 5089221 (1992-02-01), Johansson et al.
patent: 5105061 (1992-04-01), Blankenship
patent: 5120930 (1992-06-01), Sanders et al.
patent: 5132512 (1992-07-01), Sanders et al.
patent: 5164568 (1992-11-01), Sanders
patent: 5166494 (1992-11-01), Luo et al.
patent: 5170033 (1992-12-01), Couch, Jr. et al.
patent: 5235162 (1993-08-01), Nourbakhsh
patent: 5317126 (1994-05-01), Couch, Jr. et al.
patent: 5393952 (1995-02-01), Yamaguchi et al.
patent: 5396043 (1995-03-01), Couch, Jr. et al.
patent: 5424507 (1995-06-01), Yamaguchi
patent: 5468026 (1995-11-01), Annestedt
patent: 5473140 (1995-12-01), Colling
patent: 5506384 (1996-04-01), Yamaguchi
patent: 5548097 (1996-08-01), Couch, Jr. et al.
patent: 5591357 (1997-01-01), Couch, Jr. et al.
patent: 5624586 (1997-04-01), Sobr et al.
patent: 5653895 (1997-08-01), Shintani
patent: 5695662 (1997-12-01), Couch, Jr. et al.
patent: 5734144 (1998-03-01), Yamaguchi et al.
patent: 5841095 (1998-11-01), Lu et al.

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