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Machine translation
1. (WO1980001573) METHOD AND DEVICE FOR CONTROLLING A PROCESS OF CASTING THIN-WALLED INGOTS BY ELECTROSLAG REMELTING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001573    International Application No.:    PCT/SU1979/000115
Publication Date: 07.08.1980 International Filing Date: 19.11.1979
IPC:
C22B 9/18 (2006.01)
Applicants:
Inventors:
Priority Data:
2712297 31.01.1979 SU
Title (EN) METHOD AND DEVICE FOR CONTROLLING A PROCESS OF CASTING THIN-WALLED INGOTS BY ELECTROSLAG REMELTING
(FR) METHODE ET DISPOSITIF DE COMMANDE D"UN PROCEDE DE COULAGE DE LINGOTS A PAROI FINE PAR REFUSION SOUS LAITIER ELECTROCONDUCTEUR
Abstract: front page image
(EN)A method for controlling the process of casting thin-walled ingots by the electroslag remelting consists in maintaining a constant value of the inter-electrode gap. For that purpose the melting current is measured and averaged for given constant time intervals. Then the derivative of the averaged melting current is determined, the amplitude of fluctuations of the melting current around its averaged values is detected and the derivative of the detected amplitude of fluctuations of that current is determined. Finally the data thus obtained are compared and, following the results of that comparison, the melting current is adjusted in order to bring those values to zero. A device for control of the process of casting thin-walled ingots by the electroslag remelting comprises a melting current sensor (4), with its output connected to the inputs of a comparison unit (5) and of a unit (6) for determining of the averaged value of the melting current. The output of the unit (6), through a unit (7) of detection of the amplitude of fluctuations of the melting current and a unit (8) for determining the derivative of that detected amplitude, is connected to the third input (9) of a logic unit (10). The output of the unit (7) is connected to the second input (11) of the unit (10), the first input (12) of which, through a unit (13) for determining the derivative of the averaged value of the melting current, is connected to the output of the unit (6). The output of the unit (10), through the unit (5) is connected to the output of the unit (3).
(FR)Une methode de controle du procede de coulage de lingots a paroi mince par refusion sous laitier electroconducteur consiste a maintenir une valeur constante de l"espace entre les electrodes. A cet effet, le courant de fusion est mesure et on en fait la moyenne a des intervalles de temps donnes constants. Puis la derivee du courant de fusion moyen est determinee, l"amplitude des fluctuations du courant de fusion autour de ses valeurs moyennes est detectee et la derivee de l"amplitude detectee des fluctuations de ce courant est determinee. Finalement, les donnees ainsi obtenues sont comparees et, en fonction des resultats de cette comparaison, le courant de fusion est regle de maniere a amener ces valeurs a zero. Un dispositif de controle du procede de coulage des lingots a paroi mince par refusion sous laitier electroconducteur comprend un detecteur de courant de fusion (4), avec sa sortie connectee aux entrees d"une unite de comparaison (5) et une unite de determination de la valeur moyenne du courant de fusion. La sortie de l"unite (6), par l"intermediaire d"une unite de detection (7) de l"amplitude des fluctuations du courant de fusion et une unite (8) de determination de la derivee de cette amplitude detectee, est connectee a la troisieme entree (9) d"une unite logique (10). La sortie de l"unite (7) est connectee a la seconde entree (11) de l"unite (10), dont la premiere entree (12), par l"intermediaire d"une unite (13) de determination de la derivee de la valeur moyenne du courant de fusion, est connectee a la sortie de l"unite (6). La sortie de l"unite (10), par l"intermediaire de l"unite (5) est connectee a la sortie de l"unite (3).
Designated States:
Publication Language: Russian (RU)
Filing Language: Russian (RU)