EP0367024B2 - Vorrichtung zum Stranggiessen von Metallen, insbesondere von Stahl - Google Patents
Vorrichtung zum Stranggiessen von Metallen, insbesondere von Stahl Download PDFInfo
- Publication number
- EP0367024B2 EP0367024B2 EP89119336A EP89119336A EP0367024B2 EP 0367024 B2 EP0367024 B2 EP 0367024B2 EP 89119336 A EP89119336 A EP 89119336A EP 89119336 A EP89119336 A EP 89119336A EP 0367024 B2 EP0367024 B2 EP 0367024B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mould
- downstream
- shell elements
- ingot
- shell
- 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 - Lifetime
Links
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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
- B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
Definitions
- This invention concerns the field of foundries and, to be more exact, an apparatus for the continuous casting of metals and, in particular but not only, steel and the formation of ingots, whether they be round or oval or have a square section or analogous sections.
- the continuous casting to which this invention can be applied may have its casting axis vertical and straight, vertical and round or horizontal or almost horizontal.
- the solidification takes place in the form of crystals, which grow perpendicularly to the walls of the main mould and downstream mould.
- the ingot tends at a given moment to become detached form the guiding walls, with a resulting variation in the conditions of transmission of the heat and therefore of the cooling.
- the resulting material therefore, comprises outer, intermediate and inner zones consisting of different crystals.
- downstream moulds are in fact known which form ingots with a square section and downstream moulds are also known which form ingots with a round section;
- the former downstream moulds consist of four or more elements or plates positioned according to the sides of a square and distanced at their corners of convergence, whereas the latter downstream moulds consist of shell elements arranged along a circumference, see e.g. EP-A-0 268 143.
- the adjacent sides of the elements forming the downstream moulds are parallel to the direction of sliding of the metal and define clefts which extend along the ingot.
- the metal solidifies along these strips more quickly than in the neighbouring zones and enhances the conditions that contribute to the variation of the structure and to impairing the homogeneous formation of the material.
- the elements forming the known downstream moulds are normally kept in their working arrangement by means of springs, but the springs, when at work, do not make possible the variation and adjustment of the lateral thrusts on the ingot during its formation nor the correct self-adaptation of the containing elements to the movement and shrinkage of the metal.
- the present invention aims, instead, to eliminate or at least to limit appreciably the above problems and shortcomings of the continuous casting of steel by means of improvements to the downstream mould itself and to the means which support move and thrust the elements forming the downstream mould.
- the invention has also been designed for application to any mould already in operation.
- the invention concerns an apparatus for the continuous casting of steel according to the main claim, while the dependent claims describe variants of the idea of the embodiment.
- the invention is applied preferably and advantageously to downstream moulds for the casting of ingots having a round section but can be applied also to downstream moulds for the casting of ingots having a square section.
- the invention is applied to straight as well as to curved downstream moulds for the continuous casting of any type of steel and metal in general.
- the special features of this invention are therefore the provision of a mould immediately downstream of the main mould and consisting of movable, independent shell elements, the contiguous sides of which are not positioned parallel to the direction of movement of the metal, and consisting also of fluid-type actuators to operate the shell elements.
- the actuators can be of a pneumatic or oleodynamic type.
- the clefts which must not be eliminated and which exist between adjacent shell elements, have a disposition which is not parallel to, or else is like a spiral in relation to, the axis and surface of the ingot.
- This arrangement therefore makes it possible to eliminate any preferred strip of surface solidifcation, to contain and regulate better and to make more uniform the cooling and solidification of the metallic mass, to make the crystallization homogeneous and to reduce the physical, structural and mechanical shortcomings cited above.
- the individual shell elements are also enabled to stay always in contact with the ingot passing through.
- the apparatus according to the invention is applied by means of a support plate 11 immediately downstream of a main ingot mould 10, which is known in itself; the apparatus comprises a downstream mould 12, pneumatic actuators 13 to actuate the downstream mould and nozzles 14 to deliver jets of water onto the surface of the downstream mould.
- the latter consists of a plurality (four, for instance) of independent shell elements 15 able to move independently of each other and to align themselves; in this case the elements 15 are arranged in a circle (Fig.2) so as to define in conjunction a pipe 16 for the passage of metal coming from the main ingot mould 10, the pipe 16 being cylindrical or, preferably, tapered in a downstream direction.
- each shell element 15 is not parallel to the axis of the pipe 16 and to the direction of displacement of the metal in the downstream mould 12.
- each shell element 15 may be oblique, straight, curved, sinusoidal or in broken lines and define, together with the sides 17 of the neighbouring shell elements 15 (Fig.1), clefts 18, which are also oblique, so as to achieve during the casting the conditions described above and to enable the individual shell elements 15 to move and adapt themselves continuously in an independent manner.
- the clefts 18 are continuous, while the shell elements 15 are independent.
- Each shell element 15 is supported and positioned by a rocker lever 19, on which the shell element 15 is pivoted at 20 with the ability also to oscillate in a vertical plane.
- the rocker lever 19 (Fig.1) in turn is pivoted at 21 between two housings 22 secured to the support plate 11 and is articulated at 23 to a pneumatic control actuator 13 in such a way that to movements of the lever 19 there correspond movements of self-alignment and opening of each shell element 15 independently of or at the same as the other shell elements.
- each shell element 15 on its pivot 20 is restricted, instead, by abutment screws 24 secured to the housings 22 (Fig.1).
- Each piston 25 has the special feature of being equipped with a calibrated bore 27 for the regulated passage of air from the chamber under pressure to the chamber not under pressure within the cylinder 26 and from the cylinder 26 to the return duct of the pneumatic circuit.
- the pneumatic actuators 13 enable the shell elements 15 to be actuated and the thrusts existing at any moment to be possibly modified and make possible also any correction required for the operations during the casting.
- the pneumatic actuators 13 enable the shell elements 15 to be moved when required in the direction of their separation and also make use of the possibility of oscillations on the pivot 20 of the elements 15 so as to facilitate insertion of a starter bar in the downstream mould 12.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Claims (5)
- Vorrichtung zum Stranggießen von Metallen und insbesondere von Stahl, die für vertikales, gebogenes oder nahezu horizontales Gießen und für Ingots mit rundem, ovalem, quadratischem oder ähnlichem Querschnitt geeignet ist, und die eine stromabwärtige Kokille (12) in Verbindung mit einer Ingot-Hauptkokille (10) aufweist, wobei die stromabwärtige Kokille (12) aus mehreren, voneinander unabhängigen Schalenelementen (15) besteht und mit Wasser gekühlt ist, die Schalenelemente (15) Seite an Seite angeordnet sind, und sich jedes längs des Ingots vom Einlaß bis zum Auslaß der stromabwärtigen Kokille (12) erstreckt, die Schalenelemente (15) unabhängig gehalten und mittels eines Kipphebels (19) positioniert werden, welcher um eine feste, erste horizontale Achse (21) schwenkbar und mit einer Fluid-Betätigungsvorrichtung (13) verbunden ist, und jedes Schalenelement (15) um eine zweite horizontale Achse (20) schwingen kann, welche zwischen den Einlaß- und den Auslaßenden der Schalenelemente (15) gelegen ist, die Schalenelemente (15) Seiten (17) aufweisen, die in Vorschubrichtung des Metalles nicht parallel sind, wobei die Seiten (17) jedes Schalenelementes (15) zusammen mit den Seiten (17) der angrenzenden Schalenelemente (15) Spalten (18) begrenzen, die eine zur Achse und Oberfläche des gebildeten Ingots nicht parallele oder eine diesbezüglich spiralige Entwicklung haben.
- Vorrichtung nach Anspruch 1, bei welcher die Seiten (17) der Schalenelemente (15) schräg, gerade, gebogen oder sinusförmig sind oder einer gebrochenen Linie folgen.
- Vorrichtung nach Anspruch 1 oder 2, bei welcher die Schalenelemente (15) der stromabwärtigen Kokille (12) an in Reihe geschaltete und ferngesteuerte, pneumatische Betätigungsvorrichtungen (13) angeschlossen sind, um die Schalenelemente (15) hin- und hergehend zusammen- oder auseinanderzubringen und den auf den gebildeten Ingot ausgeübten, seitlichen Einschlußdruck zu regulieren.
- Vorrichtung nach Anspruch 3, bei welcher die pneumatische Betätigungsvorrichtung (13) an einer an der Ingot-Hauptkokille (10) befestigten Trägerplatte (11) angebracht ist, und die Schwingungen des Schalenelementes (15) von Anschlägen (24) begrenzt sind.
- Vorrichtung nach Anspruch 3 oder 4, bei welcher jede pneumatische Betätigungsvorrichtung (13) einen Kolben (25) aufweist, der in einem Zylinder (26) arbeiten kann, und eine kalibrierte Bohrung (27) zum regulierten Luftdurchtritt aus einer unter Druck stehenden Kammer in eine nicht unter Druck stehende Kammer innerhalb des Zylinders (26) für die Zwecke des Luftaustausches und der Kühlung des Zylinders (26) aufweist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89119336T ATE83410T1 (de) | 1988-10-31 | 1989-10-18 | Vorrichtung zum stranggiessen von metallen, insbesondere von stahl. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8805232A IT1226913B (it) | 1988-10-31 | 1988-10-31 | Attrezzatura per la colata continua dell'acciaio. |
IT523288 | 1988-10-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0367024A1 EP0367024A1 (de) | 1990-05-09 |
EP0367024B1 EP0367024B1 (de) | 1992-12-16 |
EP0367024B2 true EP0367024B2 (de) | 1997-09-24 |
Family
ID=11119715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89119336A Expired - Lifetime EP0367024B2 (de) | 1988-10-31 | 1989-10-18 | Vorrichtung zum Stranggiessen von Metallen, insbesondere von Stahl |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0367024B2 (de) |
AT (1) | ATE83410T1 (de) |
DE (1) | DE68903926T3 (de) |
ES (1) | ES2036779T5 (de) |
IT (1) | IT1226913B (de) |
RU (1) | RU1838039C (de) |
UA (1) | UA12305A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2056478C (en) * | 1990-11-29 | 1999-06-15 | Hastuyoshi Kumashiro | Adjustable mold for horizontal continuous casting apparatus |
IT1267246B1 (it) | 1994-06-06 | 1997-01-28 | Danieli Off Mecc | Sottolingottiera a pareti per colata continua |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1252371B (de) * | 1967-10-19 | Valentine Tarqumee Wassenaar (Niederlande), Royal James Scovill jun , Ogden Dunes Ind (V St. A) | Kuhlvorrichtung beim Stranggießen | |
GB761401A (en) * | 1954-05-17 | 1956-11-14 | Rossi Irving | Device for use in the art of continuous casting of metals |
US3580327A (en) * | 1968-07-15 | 1971-05-25 | Georgy Lukich Khim | Continuous casting mold |
US3882924A (en) * | 1972-12-18 | 1975-05-13 | Mitsubishi Heavy Ind Ltd | Cast piece supporting apparatus for a continuous casting machine |
FR2445744A1 (fr) * | 1979-01-04 | 1980-08-01 | Clesid Sa | Perfectionnement aux machines de coulee continue |
US4669526A (en) * | 1985-06-20 | 1987-06-02 | Sms Concast Inc. | Remotely adjustable continuous casting mold |
CH671533A5 (de) * | 1986-11-19 | 1989-09-15 | Concast Standard Ag |
-
1988
- 1988-10-31 IT IT8805232A patent/IT1226913B/it active
-
1989
- 1989-10-18 EP EP89119336A patent/EP0367024B2/de not_active Expired - Lifetime
- 1989-10-18 ES ES89119336T patent/ES2036779T5/es not_active Expired - Lifetime
- 1989-10-18 DE DE68903926T patent/DE68903926T3/de not_active Expired - Fee Related
- 1989-10-18 AT AT89119336T patent/ATE83410T1/de not_active IP Right Cessation
- 1989-10-30 RU SU894742382A patent/RU1838039C/ru active
- 1989-10-30 UA UA4742382A patent/UA12305A1/uk unknown
Also Published As
Publication number | Publication date |
---|---|
UA12305A1 (uk) | 1996-12-25 |
RU1838039C (ru) | 1993-08-30 |
DE68903926T3 (de) | 1998-02-05 |
EP0367024B1 (de) | 1992-12-16 |
IT1226913B (it) | 1991-02-22 |
EP0367024A1 (de) | 1990-05-09 |
ES2036779T3 (es) | 1993-06-01 |
ATE83410T1 (de) | 1993-01-15 |
DE68903926D1 (de) | 1993-01-28 |
IT8805232A0 (it) | 1988-10-31 |
DE68903926T2 (de) | 1993-07-01 |
ES2036779T5 (es) | 1997-12-16 |
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