EP0968780B1 - Strangabzugsverfahren - Google Patents
Strangabzugsverfahren Download PDFInfo
- Publication number
- EP0968780B1 EP0968780B1 EP99112239A EP99112239A EP0968780B1 EP 0968780 B1 EP0968780 B1 EP 0968780B1 EP 99112239 A EP99112239 A EP 99112239A EP 99112239 A EP99112239 A EP 99112239A EP 0968780 B1 EP0968780 B1 EP 0968780B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exit
- entry
- moment
- driver
- speed
- 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
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 42
- 238000005266 casting Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
Definitions
- the present invention relates to a strand withdrawal method for one in one Continuous casting machine, cast metal strand, in particular a steel strip, the metal strand is first pulled vertically from a casting mold, the metal strand is then driven with an input torque Arch input driver is stamped into an arch shape and the metal strand finally after reaching a horizontal strand running direction in one with one Output torque driven sheet output driver straightened becomes.
- Such strand withdrawal processes are generally known. With them, the cast Metal strand by means of a powered sheet input driver, too Bending driver called, bent from the vertical into an arc shape. To The metal strand is then reached by means of a driven one Sheet output driver, also called directional driver, bent straight again, so that he the continuous caster in a horizontal direction leaves.
- a powered sheet input driver too Bending driver called
- a driven one Sheet output driver also called directional driver
- the strand runs between the sheet input and sheet output drivers largely circular. Even slight differences in speed between the drivers, however, lead to the Metal strand is deflected from its ideal line. The metal strand then runs either tendon-shaped or sagging. The speed differences can therefore lead to malfunctions up to an interruption of the Run the foundry. Furthermore, in any case, the quality of the cast metal strand negatively influenced.
- the object of the present invention is a strand withdrawal method to provide, by means of which a deviation of the cast metal strand from its ideal line is avoided as far as possible.
- the sheet input driver has an input and an output speed is given to the sheet exit driver, that the input and the output torque are detected and that the Output speed is set so that both the input and the output torque also has a positive value.
- the output speed is preferably reduced when the quotient from output torque to input torque exceeds a quotient setpoint, and vice versa the output speed increases when the quotient of output torque for the input torque falls below the quotient setpoint. Because this keeps the ideal line even better.
- the quotient setpoint is preferably increased if after a decrease the output speed is the sum of the output torque and the input torque increases and conversely the quotient setpoint decreases if after a Increase the output speed the sum of output torque and Input torque increases. Because this ensures that the continuous sheet caster automatically an optimal strand course. At the same time, it uses minimal energy operated.
- a continuous sheet caster has a casting mold 1, one below it arranged heat sink 2, a sheet input driver 3 and a sheet output driver 4 on.
- liquid metal e.g. Steel
- a metal strand 5 e.g. a supporting act
- the metal initially solidifies on the outside and with the core still liquid, it becomes vertical from the casting mold 1 subtracted.
- the metal strand 5 cooled so far that it solidified in its core.
- the metal strand 5 passes through the sheet input driver 3.
- the sheet input driver 3 has driven input rollers 6.
- the input rollers 6 are driven with an input torque F e .
- the metal strand 5 is withdrawn from the casting mold 1 at a casting speed v G by means of the input rollers 6.
- an arc shape is impressed on the metal strand 5 by means of a bending roller 6 ', ie it is bent off from the vertical.
- the metal strand 5 After passing through the sheet entry driver 3, the metal strand 5 runs freely up to the sheet exit driver 4. After the metal strand 5 has entered the sheet exit driver 4, the metal strand 5 reaches a horizontal strand running direction x.
- the sheet exit driver 4 has driven exit rollers 7.
- the output rollers 7 are driven with an output torque F a .
- the metal strand 5 is conveyed further by means of the exit rollers 7. Furthermore, the metal strand 5 is straightened again by means of the exit rollers 6, ie it is bent back from the arch shape into the horizontal.
- the drives for the sheet input driver 3 and the sheet output driver 4 can be of any type. Electric motors are mostly used. In the case of electric motors in particular, the moments F e , F a can be easily detected.
- the sheet input driver 3 and the sheet output driver 4 are speed-controlled. You are therefore given an input and an output speed v e , v a .
- the input speed v e is predetermined by the casting speed v G.
- the output speed v a is available as a control parameter. Instead of the speeds v e , v a , the speeds of the rollers 6, 7 can of course also be regulated.
- the input and output torque F e , F a are recorded according to FIG. If the input torque F e has a negative value, the output speed v a is reduced, since the metal strand 5 is then conveyed too quickly by the sheet output driver 4. Conversely, if the output torque F a has a negative value, the output speed v a is increased since the metal strand 5 is then conveyed too slowly by the sheet output driver 4. If both the input and the output torque F e , F a have a positive value, the delivery rate is distributed to both drivers 3, 4, which corresponds to the desired state. As a result, the output speed v a is set such that both the input and the output torque F e , F a have a positive value.
- a quotient setpoint n is defined. If the quotient from output torque F a to input torque F e exceeds the quotient setpoint n, the output speed v a is reduced. Conversely, if the quotient from output torque F a to input torque F e falls below the quotient setpoint n, the output speed v a is increased.
- the quotient setpoint n preferably has a value above one.
- increasing or decreasing the initial speed v a is an iterative process.
- the sum S of the output torque F a and the input torque F e is formed and compared with the sum S 'of the output torque F a ' and the input torque F e 'of the previous iteration. If the sum S of output torque F a and input torque F e of the current iteration does not exceed the sum S 'of output torque F a ' and input torque F e 'of the previous iteration, the quotient setpoint n remains unchanged.
- the quotient setpoint n is increased if the initial speed v a was previously reduced. Conversely, the quotient setpoint n is reduced if the output speed v a has previously been increased.
- an optimal operation of the sheet continuous casting installation is automatically set independently of further parameters such as the strand temperature, the strand width and thickness, the casting speed v G , the change in the roll diameter due to wear and the cast metal type and quality.
- This is particularly important for thin slab casting plants with which slabs with a thickness between 40 mm and 100 mm are cast. Because with thin slab casting plants the casting speed v G is considerably higher than with conventional slab plants, so that critical plant states can be reached quickly without corrective regulation.
- the tendency to vibrate the metal strand 5 is suppressed or damped and the metal strand 5 is prevented from slipping by the strand withdrawal method according to the invention.
- the geometry of the metal strand 5 is also improved.
- the tendency of the metal strand 5 to run obliquely is reduced, which among other things leads to improved run-in behavior in the downstream units in the continuous sheet casting installation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
- Figur 1
- ein Blockschaltbild einer Bogenstranggießanlage und
- Figur 2
- ein Flußdiagramm zur Steuerung der Bogenstranggießanlage.
- 1
- Gießkokille
- 2
- Kühlkörper
- 3
- Bogeneingangstreiber
- 4
- Bogenausgangstreiber
- 5
- Metallstrang
- 6
- Eingangsrollen
- 6'
- Biegerolle
- 7
- Ausgangsrollen
- Fa, Fa, Fe, Fe'
- Momente
- n
- Quotientensollwert
- S, S'
- Summen
- Va, Ve, VG
- Geschwindigkeiten
- x
- Stranglaufrichtung
Claims (3)
- Strangabzugsverfahren für einen in einer Bogenstranggießanlage gegossenen Metallstrang (5), insbesondere ein Stahlband (5),
wobei der Metallstrang (5) zunächst aus einer Gießkokille (1) senkrecht abgezogen wird,
wobei dem Metallstrang (5) sodann in einem mit einem Eingangsmoment (Fe) angetriebenen Bogeneingangstreiber (3) eine Bogenform aufgeprägt wird und
wobei der Metallstrang (5) schließlich nach Erreichen einer waagrechten Stranglaufrichtung (x) in einem mit einem Ausgangsmoment (Fa) angetriebenen Bogenausgangstreiber (4) geradegerichtet wird,
wobei dem Bogeneingangstreiber (3) eine Eingangs- (ve) und dem Bogenausgangstreiber (4) eine Ausgangsgeschwindigkeit (va) vorgegeben werden,
wobei das Ausgangsmoment (Fa) erfaßt wird,
dadurch gekennzeichnet, daß auch das Eingangsmoment (Fe) erfaßt wird und daß die Ausgangsgeschwindigkeit (va) derart eingestellt wird, daß sowohl das Eingangs- (Fe) als auch das Ausgangsmoment (Fa) einen positiven Wert aufweisen. - Strangabzugsverfahren nach Anspruch 1,
dadurch gekennzeichnet, daß die Ausgangsgeschwindigkeit (va) erniedrigt wird, wenn der Quotient von Ausgangsmoment (Fa) zu Eingangsmoment (Fe) einen Quotientensollwert (n) übersteigt, und
daß umgekehrt die Ausgangsgeschwindigkeit (va) erhöht wird, wenn der Quotient von Ausgangsmoment (Fa) zu Eingangsmoment (Fe) den Quotientensollwert (n) unterschreitet. - Strangabzugsverfahren nach Anspruch 2,
dadurch gekennzeichnet, daß der Quotientensollwert (n) erhöht wird, wenn nach einem Erniedrigen der Ausgangsgeschwindigkeit (va) die Summe (S) von Ausgangsmoment (Fa) und Eingangsmoment (Fe) steigt und
daß umgekehrt der Quotientensollwert (n) erniedrigt wird, wenn nach einem Erhöhen der Ausgangsgeschwindigkeit (va) die Summe (S) von Ausgangsmoment (Fa) und Eingangsmoment (Fe) steigt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19829605A DE19829605C1 (de) | 1998-07-02 | 1998-07-02 | Strangabzugsverfahren |
| DE19829605 | 1998-07-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0968780A1 EP0968780A1 (de) | 2000-01-05 |
| EP0968780B1 true EP0968780B1 (de) | 2003-06-25 |
Family
ID=7872775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99112239A Expired - Lifetime EP0968780B1 (de) | 1998-07-02 | 1999-06-25 | Strangabzugsverfahren |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6260604B1 (de) |
| EP (1) | EP0968780B1 (de) |
| AT (1) | ATE243587T1 (de) |
| DE (2) | DE19829605C1 (de) |
| ES (1) | ES2202965T3 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE388770T1 (de) | 2000-04-19 | 2008-03-15 | Skf Gmbh | Verfahren und vorrichtung zum überwachen einer lageranordnung |
| DE10019324C1 (de) * | 2000-04-19 | 2001-07-26 | Skf Gmbh | Verfahren und Vorrichtung zum Überwachen einer Lageranordnung |
| CN101653823B (zh) * | 2009-07-11 | 2011-06-29 | 山西太钢不锈钢股份有限公司 | 立式连铸机斜出坯接坯控制方法 |
| EP3613899A1 (de) * | 2018-08-23 | 2020-02-26 | Joseph Vögele AG | Tamperleiste für eine einbaubohle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3344841A (en) * | 1965-06-18 | 1967-10-03 | Koppers Co Inc | Control apparatus for a continuous cast billet |
| BE787812A (fr) * | 1971-08-24 | 1973-02-21 | Uss Eng & Consult | Procede et mecanisme pour maitriser les forces exercees sur unebarre coulee en continu a mesure qu'elle se solidifie |
| JPS5820360A (ja) * | 1981-07-28 | 1983-02-05 | Nippon Kokan Kk <Nkk> | 鋼の連続鋳造方法 |
| JP2849152B2 (ja) * | 1990-03-05 | 1999-01-20 | 日新製鋼株式会社 | 連続鋳造機におけるバルジング量の測定方法及びバルジングの抑制方法 |
| US6044895A (en) * | 1993-12-21 | 2000-04-04 | Siemens Aktiengesellschaft | Continuous casting and rolling system including control system |
-
1998
- 1998-07-02 DE DE19829605A patent/DE19829605C1/de not_active Expired - Fee Related
-
1999
- 1999-06-25 ES ES99112239T patent/ES2202965T3/es not_active Expired - Lifetime
- 1999-06-25 DE DE59906063T patent/DE59906063D1/de not_active Expired - Lifetime
- 1999-06-25 EP EP99112239A patent/EP0968780B1/de not_active Expired - Lifetime
- 1999-06-25 AT AT99112239T patent/ATE243587T1/de active
- 1999-06-30 US US09/345,589 patent/US6260604B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6260604B1 (en) | 2001-07-17 |
| EP0968780A1 (de) | 2000-01-05 |
| DE19829605C1 (de) | 1999-10-14 |
| ES2202965T3 (es) | 2004-04-01 |
| ATE243587T1 (de) | 2003-07-15 |
| DE59906063D1 (de) | 2003-07-31 |
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