EP0156764B1 - Moule électromagnétique de coulée continue - Google Patents

Moule électromagnétique de coulée continue Download PDF

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Publication number
EP0156764B1
EP0156764B1 EP85810058A EP85810058A EP0156764B1 EP 0156764 B1 EP0156764 B1 EP 0156764B1 EP 85810058 A EP85810058 A EP 85810058A EP 85810058 A EP85810058 A EP 85810058A EP 0156764 B1 EP0156764 B1 EP 0156764B1
Authority
EP
European Patent Office
Prior art keywords
main piston
pressure chamber
continuous casting
pressure
pistons
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
EP85810058A
Other languages
German (de)
English (en)
Other versions
EP0156764A1 (fr
Inventor
Laurent Zuber
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium 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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Publication of EP0156764A1 publication Critical patent/EP0156764A1/fr
Application granted granted Critical
Publication of EP0156764B1 publication Critical patent/EP0156764B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/049—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • B22D11/015—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces using magnetic field for conformation, i.e. the metal is not in contact with a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls

Definitions

  • the invention relates to an electromagnetic continuous casting mold with side and end walls, which each consist of an inductor part with an induction loop and a screen, at least one end wall being slidably attached to the side walls via releasable locking bolts, while the respective inductor parts and the screens are connected via a clamping device with in Cylinder chambers seated pistons are connected to closed loops.
  • molten metal is poured at a predetermined speed onto a start-up base attached within a loop-shaped electrical inductor.
  • the approach floor is lowered at a speed adapted to the casting rate.
  • High-frequency alternating current in the inductor generates an electromagnetic force field that limits the metal melt introduced horizontally within the inductor in a form that is essentially determined by the inner contours of the inductor loop.
  • a coolant such as water
  • Such systems usually have a tapering electromagnetic shield. This is mounted coaxially inside the inductor and is made of a metal (e.g. stainless steel). Due to its shape, this screen serves to weaken the magnetic field above the inductor, so that the electromagnetic forces constricting the cross section of the bar head are reduced.
  • a tapering electromagnetic shield This is mounted coaxially inside the inductor and is made of a metal (e.g. stainless steel). Due to its shape, this screen serves to weaken the magnetic field above the inductor, so that the electromagnetic forces constricting the cross section of the bar head are reduced.
  • Electromagnetic continuous casting molds are complex and costly, primarily due to the narrow dimensional tolerances that must be observed during the production of the molds.
  • the numerous different cast ingot formats also entail the uneconomical need to keep a correspondingly large number of molds in stock.
  • a conventional continuous casting mold with adjustable mold end walls is known from DE-AS-1 059 626.
  • the task and structure of a conventional continuous casting mold differ fundamentally from that of an electromagnetic continuous casting mold; thus there is no possibility of transmission.
  • the mold is used to dissipate the heat of fusion through contact with the melt.
  • it forms the vessel wall for the melt and must therefore be leakproof over its entire circumference.
  • the electromagnetic mold does not come into contact with the melt. It is used to conduct current in a defined manner and also contains devices for additionally influencing the magnetic field.
  • the contact pressure for the contact elements depends solely on the rotation of the camshaft, which, if it is designed to run very smoothly, also runs the risk of changing during the operation of the mold, so that the contact pressure decreases. Furthermore, the contact elements can only be moved out of the clamping device as far as the height of the cam mountain.
  • the inventor has set itself the goal of creating a clamping device for the connection between the end wall and side walls, which does not have these disadvantages and in particular can be brought into effect very quickly. Furthermore, the possible extension range of the plungers and their contact pressure should be designed to be variable.
  • the cylinder spaces are connected via branch lines or channels to a pressure chamber in a cylinder bore and are filled with a pressure medium which can be pressurized by a main piston.
  • the main piston should preferably be covered by the pressure chamber with a bellows, on which sits a plate on which there is a disk which is eccentrically pierced by an axle shaft.
  • This disc is moved in a certain direction using a lever moves, the disc presses due to the eccentrically arranged axle shaft on the plate, this on the bellows and thus also on the main piston.
  • the bellows essentially serves as a buffer to absorb excessive pressure in the pressure chamber or, for example, to compensate for vibrations within the mold. In this way, the entire clamping device can be brought into the desired contact with the inductor parts or the screen with a single handle. The same also applies to relaxing the clamping device.
  • a control piston delimits the pressure chamber in the cylinder bore, the position of which can be changed using an adjusting screw.
  • All pistons are in sealing contact with their respective cylinder chambers via ring seals.
  • This clamping device is extremely simple and therefore very little prone to failure.
  • Any pressure medium can be located in the pressure chamber or the channels or branch lines, a pressure fluid is preferred.
  • the mold 10 shown in FIGS. 1 to 3 has a pair of opposite side walls 12 and a pair of movable end walls 14, which together form a mold opening 16.
  • the end walls 14 can slide with a sliding shoe 18 on the surface t9 of the side walls 12.
  • a spring-loaded locking pin 20 is attached to each slide shoe 18 of the end walls 14 and fits into blind holes 22, which are arranged at a predetermined distance in the surface 19 of the end walls 12; the end walls 14 can thus be attached at the desired locations along the side walls 12.
  • a side wall 12 of the mold 10 has a mold frame 24, to which an insulation body 26 is fastened with screws 28.
  • An electromagnetic screen 36 is attached to the mold frame 24 with further screws 37, which leaves a gap 38 to the induction loop 30, from which a cooling jet from a water chamber 40 via a channel 42 onto the surface of a cast ingot 43 - shown only in broken lines in FIG. 1 meets.
  • the end walls 14 have a structure similar to that of the side walls 12.
  • a clamping device 44 is attached in order to electrically close both the induction loop 30 of the side wall 12 with an induction loop (not shown) on the end wall 14 and the screen 36 on the side wall 12 with a screen on the end wall connect.
  • this clamping device 44 has a cylinder bore 46 which is bridged by an axle shaft 48 which passes through a disc 50 eccentrically, the disc 50 being able to be moved around the shaft 48 in the direction x by means of a lever 52.
  • the eccentrically mounted disc 50 presses on a plate 54 in the cylinder bore 46, which presses a main piston 58 via a bellows 56.
  • a control piston 60 there is a pressure chamber 62 for receiving compressed air or a pressure fluid.
  • the pressure chamber and thus the pressure in the pressure chamber can be changed via the control piston 60. This is done by means of an adjusting screw 64, which passes through the clamping device 44 or the cylinder bore 46 from below with a thread 66 and engages the control piston 60 in the opposite direction from the pressure chamber 62.
  • channels 68 lead from the pressure chamber 62, which are connected via branch lines 70 to two cytin spaces 72 and 73, respectively.
  • Pistons 74 and 76 with end plates 75 are arranged in each of these.
  • the upper pistons 74 engage the screen 36 of the side wall 12 in the position of use, while the lower pistons 76 serve to connect to the induction loop 30.
  • contact elements (not shown) can be used.
  • All pistons 58, 60, 74, 76 are provided with ring seals 78.
  • Lines 80 are used to guide the cooling liquid in the cooling channels 32 of the induction loop 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Rehabilitation Tools (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Claims (5)

1. Lingotière électromagnétique de coulée continue avec des parois latérales et des parois frontales qui sont respectivement constituées d'une partie formant inducteur avec une boucle d'induction et un écran, étant précisé qu'au moins une paroi frontale est fixée, par l'intermédiaire de broches de verrouillage amovibles, avec possibilité de coulissement, aux parois latérales, tandis que les parties respectives formant inducteur et les écrans sont reliés, par l'intermédiaire d'un dispositif de serrage, à des pistons placés dans des espaces cylindriques, pour donner des boucles fermées, caractérisée en ce que les espaces cylindriques (72, 73) sont reliés, par l'intermédiaire de conduites d'embranchement (70) et de canaux (68), à une chambre sous pression (62) située dans un alésage cylindrique (46) et sont remplis d'un fluide sous pression que l'on peut mettre sous pression au moyen d'un piston principal (58)..
2. Lingotière selon la revendication 1, caractérisée en ce que le piston principal (58) est garni, de l'autre côté de la chambre sous pression 62), par un soufflet (56) sur lequel repose une plaque (54) sur laquelle vient un disque (50) traversé excentriquement par un arbre (48).
3. Lingotière selon la revendication 2, caractérisée en ce que l'on peut faire tourner le disque (50), par l'intermédiaire d'un levier (52), dans la direction (x), autour de l'arbre (48) disposé excentriquement, de sorte que le disque appuie sur la plaque (54).
4. Lingotière selon l'une des revendications 1 à 3, caractérisée en ce que la chambre sous pression (62) qui se trouve dans l'alésage cylindrique (46) est limitée, du côté opposé au piston principal (58), par un piston de réglage (60) dont on peut modifier la position au moyen d'une vis de positionnement (64).
5. Lingotière selon l'une des revendications 1 à 4, caractérisée en ce que les pistons (74, 76) ainsi que le piston principal (58) et le piston de réglage (60) s'appliquent dans leurs espaces cylindriques respectifs (72, 73) ou dans l'alésage cylindrique (46) par l'intermédiaire de garnitures d'étanchéité annulaires (78).
EP85810058A 1984-02-22 1985-02-15 Moule électromagnétique de coulée continue Expired EP0156764B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH848/84 1984-02-22
CH84884 1984-02-22

Publications (2)

Publication Number Publication Date
EP0156764A1 EP0156764A1 (fr) 1985-10-02
EP0156764B1 true EP0156764B1 (fr) 1987-09-09

Family

ID=4196618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810058A Expired EP0156764B1 (fr) 1984-02-22 1985-02-15 Moule électromagnétique de coulée continue

Country Status (9)

Country Link
US (1) US4892134A (fr)
EP (1) EP0156764B1 (fr)
JP (1) JPS60203342A (fr)
AU (1) AU573691B2 (fr)
CA (1) CA1231511A (fr)
DE (2) DE3406699C1 (fr)
IS (1) IS1350B6 (fr)
NO (1) NO162750C (fr)
ZA (1) ZA85894B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004582A1 (fr) * 1992-08-21 1994-03-03 S/S Performance Products, Inc. Nouveau catalyseur de durcissement de resine epoxy
CH688991A5 (de) * 1994-04-06 1998-07-15 Alusuisse Lonza Services Ag Regulierbare elektromagnetische Stranggiesskokille.
NO302803B1 (no) * 1996-03-20 1998-04-27 Norsk Hydro As Utstyr for bruk ved kontinuerlig stöping av metall
US6857464B2 (en) * 2002-09-19 2005-02-22 Hatch Associates Ltd. Adjustable casting mold
US7007739B2 (en) * 2004-02-28 2006-03-07 Wagstaff, Inc. Direct chilled metal casting system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009515A (en) * 1933-09-16 1935-07-30 Hydromatic Corp Valve system
US2399505A (en) * 1943-08-12 1946-04-30 Lee A Phillips Throttle and pressure control
US2414675A (en) * 1945-02-14 1947-01-21 Stelzer William Power brake
DE1059626B (de) * 1957-04-06 1959-06-18 Aluminium Walzwerke Singen Stranggiesskokille
FR1469166A (fr) * 1965-12-29 1967-02-10 Creusot Forges Ateliers Appareil de réglage de lingotière pour la coulée continue des métaux
US3424886A (en) * 1966-10-27 1969-01-28 Ajax Magnethermic Corp Induction heating
US3605865A (en) * 1969-12-23 1971-09-20 Getselev Zinovy N Continuous casting apparatus with electromagnetic screen
US4093184A (en) * 1977-03-07 1978-06-06 Harnischfeger Corporation Hydraulic brake system for crane hoist drum
CH625441A5 (fr) * 1977-12-05 1981-09-30 Alusuisse
US4512386A (en) * 1982-11-12 1985-04-23 Swiss Aluminium Ltd. Adjustable mold for electromagnetic casting

Also Published As

Publication number Publication date
AU573691B2 (en) 1988-06-16
EP0156764A1 (fr) 1985-10-02
AU3871585A (en) 1985-08-29
CA1231511A (fr) 1988-01-19
NO162750B (no) 1989-11-06
DE3560551D1 (en) 1987-10-15
US4892134A (en) 1990-01-09
ZA85894B (en) 1985-09-25
NO162750C (no) 1990-02-14
NO850662L (no) 1985-08-23
JPS60203342A (ja) 1985-10-14
IS2976A7 (is) 1985-08-23
IS1350B6 (is) 1989-03-20
DE3406699C1 (de) 1985-01-10

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