175.
(11) Patent number: 2150797
(46) Date of publication: 10.06.2000
(51) Int. Cl.7: H 05 B 7/18
(21) Application number: 98122181/06
(22) Application date: 01.12.1998
(71) Applicant:
Institut fiziko-tekhnicheskikh problem Severa SO RAN
(72) Inventor:
Ivanov A.M.,
Kirenskij I.E.
(73) Proprietor:
Institut fiziko-tekhnicheskikh problem Severa SO RAN
(98) Mail address:
677891, g.Jakutsk, ul. Oktjabr'skaja 1, Institut fiziko-tekhnicheskikh problem Severa, direktoru instituta g-nu Larionovu V.P
(54) METHOD FOR CONTROLLING PLASMA-ARC TREATMENT CONDITIONS
(57)
FIELD: electrothermics; plasma generator control. SUBSTANCE: method involves ignition of working arc between electrode and metal. If electrical variable indicating shorting-out arcs between nozzle and metal exceeds critical value, working-arc current is reduced. Novelty is that nozzle temperature is additionally used as controlled variable characterizing arc burning stability; this temperature is referred to in controlling shielding gas supply and varying working arc current. EFFECT: improved service life of plasma generator.
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