EP0094378B1 - Dispositif de fusion comportant des électrodes consommables - Google Patents

Dispositif de fusion comportant des électrodes consommables Download PDF

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Publication number
EP0094378B1
EP0094378B1 EP19830890082 EP83890082A EP0094378B1 EP 0094378 B1 EP0094378 B1 EP 0094378B1 EP 19830890082 EP19830890082 EP 19830890082 EP 83890082 A EP83890082 A EP 83890082A EP 0094378 B1 EP0094378 B1 EP 0094378B1
Authority
EP
European Patent Office
Prior art keywords
electrode
lever
load cell
carriage
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19830890082
Other languages
German (de)
English (en)
Other versions
EP0094378A2 (fr
EP0094378A3 (en
Inventor
Peter Dipl.-Ing. Machner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0094378A2 publication Critical patent/EP0094378A2/fr
Publication of EP0094378A3 publication Critical patent/EP0094378A3/de
Application granted granted Critical
Publication of EP0094378B1 publication Critical patent/EP0094378B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc
    • H05B7/102—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc specially adapted for consumable electrodes

Definitions

  • the invention relates to a device for carrying out remelting processes with self-consuming electrodes, which device has a liftable and lowerable, with at least one load cell measuring device provided for determining the respective electrode weight with an electrode holder, via which the power supply line is led to the electrode .
  • the melting rate has a decisive influence on the block quality achieved, especially when vacuum arc remelting (referred to in the professional world as VAR process). For this reason, the remelting speed in the VAR process is regulated by setting appropriate electrical parameters.
  • the constant reduction in weight of the electrode during remelting is used as the measurement variable for determining the melting rate.
  • the respective electrode weight is preferably determined by pressure load cells which are arranged in the region of the electrode feed rod.
  • pressure transducers are not a problem for the VAR process because, on the one hand, they can be positioned outside the thermally influenced zone or in an area without heat being influenced by the weld pool; on the other hand, due to the process, the feed rod must be welded centrally onto the electrode, thereby avoiding unbalance. Because the process works with direct current, no voltages are induced in the load cell, so that there are no problems with the power lines.
  • the alternating magnetic field of the melt stream can, on the one hand, cause the pressure cell to heat up to impermissibly high temperatures; on the other hand, there is the possibility that the measurement signal is falsified by the action of a magnetic field.
  • the current supply to the electrode holder takes place via a tube which runs coaxially to the electrode and which is closed at its lower end with a stopper which ends in a bolt thread.
  • An end cap made of copper is screwed onto this, in which four load cells are arranged, which are supported on the bottom of the end cap and which in turn support an extension of a rod passing through the bottom of the end cap, on which the electrode holder hangs.
  • the electrode holder is arranged on a lever connected to the electrode carriage via a rotational axis running transversely to the longitudinal axis of the electrode, and in that a load cell is supported on the one hand on the lever and on the other hand on the electrode carriage, optionally with the interposition of a retaining bolt is, the current supply line to the electrode preferably, as is known per se from AT-PS 333 450, via two parallel and at the same distance from the load cell lines. It is possible to put the power lines in it to lead a considerable distance from the load cell, with lines connected in parallel and routed at equal distances from the load cell practically canceling out their current effects on the load cell.
  • the load cell can be placed in a location shielded from the radiant heat of the weld pool or the heated parts. In this context, it is advantageous if the load cell is arranged on the top of the electrode carriage.
  • the load on the lever by the electrode holder and the cables etc. is distributed or balanced as evenly as possible.
  • the load cell is practically only loaded by the weight of the electrode and the clamping bolt and the desired high accuracy of weighing is achieved.
  • both tensile or pressure load cells and load cells which respond to torsional forces can be used.
  • the lever is designed as a two-armed lever, at the end region facing away from the electrode holder which is connected to the Load cell connected to the electrode carriage attacks.
  • the load cell can thus be shielded in a simple manner from the heat influence of the slag bath or other parts and can be arranged at a considerable distance from the electrode.
  • a corresponding choice of the dimensions of the lever arms results in the possibility of using load cells with the same measuring ranges for different electrode dimensions.
  • Various connection points can be provided for connecting the load cell to the lever.
  • the pressure transducer must not be changed when the electrode weight is weighed according to the invention, but the requirement for centering the electrode in the mold can result from eccentric or oblique welding of the electrode to the mold, so there will also be a design variant Proposed, which is characterized in that the lever, the axis holder for its axis of rotation and the optionally provided retaining bolt are arranged on a slide which is displaceable transversely to this axis, preferably in a guide in the upper part of the electrode carriage for changing the projection of the electrode holder.
  • the lever can also be designed as a one-armed support part lying directly on the load cell.
  • the distance between the electrode and the support column of the electrode carriage and thus the projection of the electrode holder can thus be changed by moving the slide without changing the lever arms, so that there is no impairment of the weighing or the weighing accuracy.
  • the position change which may be required for the adjustment of the electrode transversely to the direction of slide displacement can be achieved by rotating the electrode carriage about the axis of the support column.
  • An electrode carriage 1 is fastened and lowered on a support column 2 by means of a drive (not shown), the drive control being carried out as a function of the electrode weight.
  • the electrode carriage 1 is designed like a console and on its upper side it carries, in a mirror-image arrangement, a plurality of uprights 3, to which the lines 4, which are used for the current supply to the electrode 12, are connected in parallel.
  • an axis of rotation 5 is mounted, on which a two-armed lever 6 is pivotally arranged and is thus connected to the electrode carriage 1.
  • the lever 6 At its end facing away from the support column 2, the lever 6 carries on its upper side two gripping jaws 7 connected to the lines 4. These jaws 7 together with the two levers 9 pivotable about the axes 8 perpendicular to the lever 6 and the lever 9 connected to them Piston-cylinder arrangement 10 an electrode holder 11.
  • the jaws 7 can be connected to an electrode 12 electrode rod 13, preferably connected by welding, can be clamped, whereby the electrode 12 is held and at the same time the current flow to the electrode 12 is ensured.
  • Tilting of the lever 6 under the load of the electrode 12 is prevented by a bolt 14 fastened to the electrode carriage 1, to which also a load cell, preferably a pressure cell 15 is fastened or supported via a nut 16 in such a way that the lever 6 is on its upper side bears against the pressure cell with which the respective weight of the electrode 12 can be determined.
  • the lines 4 run at equal, relatively large distances from the pressure cell 15, so that the influence of the magnetic forces caused by the current flow is small and these forces moreover due to the parallel connection and the symmetrical arrangement of the two Compensate power supply lines 4 almost completely.
  • the electrode carriage 1 is usually made of solid material, there is also a very good shielding of the pressure cell 15 against the radiant heat of the molten bath, which can be further easily achieved by the arrangement of heat-insulating plates on the underside of the electrode carriage 1 can improve.
  • the fact that its distance from the electrode 12 or the electrode rod 13 is relatively large also contributes to a merely low thermal load on the pressure sensor 15.
  • the respective weight of the electrode 12 together with the electrode rod 13 can always be determined by means of the pressure load cell 15, only a small tare weight being measured.
  • the latter can be largely reduced by appropriate design of the lever 6 or arrangement of the electrode holder 11 and, if desired, also z. B. fully compensate by attaching counterweights to the lever 6.
  • 3 to 6 illustrate two further embodiment variants of the lever construction, with which the projection of the electrode holder can be changed without the weighing being influenced thereby.
  • a guide 18 is incorporated in the upper part thereof, in which a slide 17 is arranged or guided in a displaceable manner.
  • the double-armed lever 6 corresponds to that of FIGS.
  • the devices according to the invention are also suitable for the production of steel blocks by block casting and subsequent hot topping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (6)

1. Installation pour la mise en oevre de procédés de refusion avec électrodes autoconsom- mables (12), cette installation comprenant un chariot porte-électrode (1) avec une fixation d'électrode, pouvant se soulever et s'abaisser, pourvu d'un dispositif de mesure comportant au moins une boîte dynamométrique (15) destiné à déterminer le poids de l'électrode, chariot par lequel passe le câble d'alimentation en courant aboutissant à l'électrode, caractérisée par le fait que la fixation d'électrode (11) est disposée sur le levier (6) relié au chariot porte-électrode (1) par un axe rotation (5, 5') dirigé transversalement par rapport à l'axe longitudinal de l'électrode (12) et qu'une boîte dynamométrique (15) s'appuie, d'une part, sur le levier (6, 6') et, d'autre part, sur le chariot porte-électrode (1), éventuellement par l'intermédiaire de pièces reliées à ces éléments.
2. Installation selon la revendication 1, caractérisée en ce que le levier (6) est un levier à deux bras, la boîte dynamométrique (15) reliée au chariot porte-électrode (1) agissant sur la partie terminale de ce levier située à l'opposé de la fixation de l'électrode (11, 7).
3. Installation selon la revendication 1 ou 2, caractérisée en ce que la boîte dynamométrique (15) est disposée sur le côté supérieur du chariot porte-électrode (1).
4. Installation selon une quelconque des revendications 1 à 3, caractérisée en ce que le levier (6, 6'), les butées d'axe pour son axe de rotation (5, 5') et le boulon de retenue (14) éventuellement prévu sont disposés sur un chariot (17) pouvant se déplacer transversalement par rapport à cet axe dans un guidage (18) prévu dans la partie supérieure du chariot porte-électrode (1) afin de modifier le porte-à-faux de la fixation d'électrode.
5. Installation selon la revendication 1 ou 4, caractérisée en ce que le levier (6') est une pièce à un seul bras reposant directement sur la boîte dynamométrique (15).
6. Installation selon quelconque des revendications 1 à 5, caractérisée en ce que l'alimentation en courant de l'électrode (12) s'effectue par deux câbles (4) montés en parallèle et disposés à la même distance de la boîte dynamométrique (15).
EP19830890082 1982-05-12 1983-05-11 Dispositif de fusion comportant des électrodes consommables Expired EP0094378B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1861/82 1982-05-12
AT186182A AT373177B (de) 1982-05-12 1982-05-12 Einrichtung zur durchfuehrung von umschmelzverfahren mit selbstverzehrenden elektroden

Publications (3)

Publication Number Publication Date
EP0094378A2 EP0094378A2 (fr) 1983-11-16
EP0094378A3 EP0094378A3 (en) 1984-05-02
EP0094378B1 true EP0094378B1 (fr) 1985-12-27

Family

ID=3522581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830890082 Expired EP0094378B1 (fr) 1982-05-12 1983-05-11 Dispositif de fusion comportant des électrodes consommables

Country Status (3)

Country Link
EP (1) EP0094378B1 (fr)
AT (1) AT373177B (fr)
DE (1) DE3361622D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140724A1 (de) * 1991-12-10 1993-06-17 Leybold Durferrit Gmbh Umschmelzanlage und verfahren zum betreiben einer solchen
DE4207967A1 (de) * 1992-03-13 1993-09-16 Leybold Durferrit Gmbh Umschmelzofen
DE102010025236A1 (de) 2010-02-18 2011-08-18 SMS Siemag AG, 40237 Elektrodentragarm eines schmelzmetallurgischen Ofens

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1862172A1 (fr) 2006-05-31 2007-12-05 BioSynthema Inc. Combinaison d'une solution d'acides aminés et de gélatine pour l'inhibition de l'absorption rénale
CA3079360C (fr) 2017-11-08 2023-06-13 Sms Mevac Gmbh Four de fusion pourvu d'une tige d'electrode rotative et deplacable simultanement
DE102018103312B4 (de) * 2018-02-14 2019-08-22 Ald Vacuum Technologies Gmbh Umschmelzanlage und Verfahren zum Betrieb einer Umschmelzanlage
WO2020224780A1 (fr) 2019-05-08 2020-11-12 ITM Isotopen Technologien München AG Acide para-aminohippurique (pah) en tant que substance protectrice rénale

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA559376A (de) * 1976-07-29 1978-10-15 Inteco Int Techn Beratung Anlage zum elektroschlacken-umschmelzen von abschmelzelektroden zu bloecken
US4091229A (en) * 1977-03-01 1978-05-23 Wooding Corporation Slag and alloy feeding based on electrode weight
DE2755478C2 (de) * 1977-12-13 1982-03-18 Institut elektrosvarki imeni E.O. Patona Akademii Nauk Ukrainskaja SSR, Kiev Anlage zur Herstellung von Gußblöcken im Elektroschlacke-Umschmelzverfahren
US4303797A (en) * 1980-06-20 1981-12-01 Consarc Corporation Method and apparatus for controlling electrode drive speed in a consumable electrode furnace

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140724A1 (de) * 1991-12-10 1993-06-17 Leybold Durferrit Gmbh Umschmelzanlage und verfahren zum betreiben einer solchen
DE4207967A1 (de) * 1992-03-13 1993-09-16 Leybold Durferrit Gmbh Umschmelzofen
DE4207967C2 (de) * 1992-03-13 2001-02-15 Ald Vacuum Techn Ag Umschmelzofen
DE102010025236A1 (de) 2010-02-18 2011-08-18 SMS Siemag AG, 40237 Elektrodentragarm eines schmelzmetallurgischen Ofens
WO2011101271A1 (fr) 2010-02-18 2011-08-25 Sms Siemag Ag Bras de support d'électrode d'un four de fusion métallurgique

Also Published As

Publication number Publication date
AT373177B (de) 1983-12-27
DE3361622D1 (en) 1986-02-06
ATA186182A (de) 1983-05-15
EP0094378A2 (fr) 1983-11-16
EP0094378A3 (en) 1984-05-02

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