EP4572904A1 - VERFAHREN UND COMPUTERPROGRAMMPRODUKT ZUM BETREIBEN EINER GIEß-WALZANLAGE - Google Patents
VERFAHREN UND COMPUTERPROGRAMMPRODUKT ZUM BETREIBEN EINER GIEß-WALZANLAGEInfo
- Publication number
- EP4572904A1 EP4572904A1 EP23750927.8A EP23750927A EP4572904A1 EP 4572904 A1 EP4572904 A1 EP 4572904A1 EP 23750927 A EP23750927 A EP 23750927A EP 4572904 A1 EP4572904 A1 EP 4572904A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- rolling
- speed
- strand
- rollers
- 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.)
- Pending
Links
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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
-
- 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
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
-
- 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
- B22D11/14—Plants for continuous casting
- B22D11/142—Plants for continuous casting for curved 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
- B22D11/16—Controlling or regulating processes or operations
-
- 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 invention relates to a method and a computer program product for operating a casting-rolling system with a casting system and a rolling system downstream of the casting system in the casting direction.
- the casting plant and the rolling mill are coupled to one another in an endless operating mode via a cast endless casting strand.
- the invention relates to a corresponding casting-rolling system.
- Japanese patent application JP 2010253450 A discloses a method for regulating the speed of a first rolling stand behind the casting plant. To do this, the speed control is adjusted with an additional control unit until the control deviation is within a specified range. All drivers in the casting system are speed-controlled and are all given the same target value. This method keeps the speed of the first rolling stand at a defined interval, but does not take into account the torques of the drivers in the casting machine. As the drivers in the casting system are all speed-controlled and run at the same target value, the driver rollers can slip.
- This patent application describes a speed control in a coupled casting-rolling plant.
- a first driver in front of a first roll stand serves as an actuator for a speed control to regulate the actual casting speed to a predetermined target casting speed.
- a casting ring and the other drivers in the casting system are also operated in a speed-controlled manner and have the current speed of the first driver as target value.
- a roll stand downstream of the casting plant is also speed-controlled, with the target speed value being adjusted so that the torque of the first driver remains constant.
- a driver torque is used to control the first rolling stand, but all other drives are each speed-controlled with the same setpoint specified. This can also lead to driver rollers slipping.
- the international patent application WO 2021/140531 and the European patent application EP 3 000 539 A also each disclose a method for operating a casting-rolling system in an endless operation. These methods envisage using the first roll stand behind the casting machine as a “speed master” and regulating it to a desired target casting speed. However, due to changing boundary conditions in the casting process, thickness fluctuations regularly occur over the length of the casting strand and thus undesirable mass flow fluctuations. If rolling is then carried out in the first roll stand at a casting speed that is regulated to a constant target value and the outlet thickness is controlled very precisely, the casting speed in the upstream casting system often has to be adjusted accordingly. This is disruptive to the casting process.
- the invention is therefore based on the object of developing a known method and computer program product for operating a coupled casting-rolling system and a corresponding known coupled casting-rolling system in such a way that the described undesirable disruptions to the casting process and / or slipping of the driver rollers are reduced, preferably prevented .
- Driver roller pair is a master driver roller pair which acts as the only actuator for regulating the casting speed of the casting strand in the strand guide or at its exit in front of the first roll stand; that upstream of the first roll stand, in particular in the strand guide, at least one pair of slave driver rollers is provided next to the master driver roller pair; and that the actual torque of the rollers of the slave driver roller pair is regulated to a predetermined target torque.
- the target casting speed is specified before and during the casting-rolling process by the operators of the casting-rolling system or by a responsible production planning facility.
- upstream of the first roll stand or “in front of the first roll stand” includes all locations or positions that - based on the casting direction - lie in front of the first roll stand in the casting-rolling plant and where the casting strand already exists. This means the area between the exit of the mold and the first roll stand, including the area of the strand guide and including the area between the exit of the strand guide and the first roll stand, excluding the first roll stand.
- a driver or a driver device is a driven pair of rollers with power adjustment for transmitting a torque to the casting strand passed through the driver.
- the rollers are strand guide rollers.
- any other driven pair of rollers can also function as a slave driver device in front of the first roll stand.
- the rollers are, for example, the work rolls of a rolling stand.
- any other driven pair of rolls can also be used as a slave driver device of the rolling mill.
- An electric motor typically acts as a rotary drive for the rollers.
- the continuous operation of a casting-rolling plant is characterized by the fact that all parts of the system, from the casting plant to the rolling plant up to a coiling area downstream of the rolling plant for winding up the rolled metal strip, are coupled to one another by the casting strand or the rolled metal strip.
- only one pair of driver rollers in front of the first roll stand can be the "speed master” and specify the casting speed, while all other drivers in the casting plant and/or in the rolling mill are slave drivers, which are controlled by the "speed master". Master” must follow the predetermined casting speed or adjust their speed accordingly, as claimed by the present invention. This means in particular that no pair of slave driver rollers, neither in the casting plant nor in the rolling plant, may be operated with casting speed control.
- the inventive claimed arrangement of the master driver roller pair in the casting plant or at least in front of the first roll stand ensures that the casting plant is operated as constantly as possible. Disturbances in the casting process that occur in real operation, such as fluctuations in the thickness of the casting strand, measurement errors or roller wear, can be at least largely reduced or even eliminated by the claimed arrangement of the “Speed Master” in the casting direction in front of the first roll stand.
- Fig. 1 shows the rolling mill according to the invention with a
- Fig. 2 shows the casting-rolling plant according to the invention with the
- Fig. 1 shows the casting-rolling system 100 according to the invention. It comprises a casting system 110, which in turn consists of a mold 112 for casting a casting strand 20 and a strand guide device 114 with strand guide rollers arranged downstream of the mold in the casting direction G for guiding the casting strand 20. Both in In the curved bending area of the strand guide device 114 as well as in its horizontal outlet area, two opposing strand guide rollers can form a pair of driver rollers.
- exactly one of these pairs of rollers or a pair of rollers is provided at the exit of the strand guide 114 in front of the first roll stand 122 as a master driver roller pair 118 as an actuator for regulating the casting speed of the casting strand 20 with the aid of a casting speed controller 142.
- the casting speed controller 142 is designed to regulate the actual casting speed to a predetermined target casting speed by appropriately varying the power or current the drive of the master roller pair 118.
- the casting speed controller 142 is the “speed master” or the master controller in the sense of the present invention.
- the casting system 110 is followed in the casting direction G by a rolling system 120 with at least the first rolling stand 122 for rolling the casting strand 20, the casting system 110 and the rolling system 120 being operated in particular in an endless operating mode in which they are coupled to one another via the endless casting strand 20 are.
- At least one slave driver roller pair 116 is provided in the casting system 110 and in particular in its strand guide device 114, which is controlled to a predetermined target torque with the aid of a torque controller 144.
- the casting-rolling system 100 is designed to carry out the method according to the invention. This procedure is explained below:
- the casting strand 20 cast in the mold is guided through the strand guide rollers of the strand guide device 114 and conveyed in the casting direction through the casting-rolling system 100.
- the master casting speed controller 142 the actual casting speed of the casting strand 20 is regulated to a predetermined target casting speed by suitable variation of the power or current of the drive of the master roller pair 118.
- Fig. 1 shows a first embodiment of the control of the casting speed according to the invention.
- the speed of the drive of the master driver roller pair 118 is defined as a controlled variable and the target casting speed is specified in the form of a target speed for the drive of the master driver roller pair 118.
- the actual Casting speed represented by the actual speed of the drive of the master driver roller pair 118
- the target casting speed represented by the predetermined target speed of the drive of the master driver roller pair 118.
- Fig. 2 shows an alternative embodiment of the control of the casting speed according to the invention.
- the speed of the casting strand 20 or the speed of its surface is defined as a controlled variable.
- the actual casting speed represented by the actual speed of the casting strand 20 or by the actual speed of the surface of the casting strand 20
- the predetermined target casting speed represented by a predetermined target speed for the casting strand or for the surface of the casting strand, with the master driver roller pair 118 acting as an actuator.
- At least one further roller pair 116 is provided in the casting system 110 as a so-called slave driver roller pair. Only said master driver roller pair 118 is speed-controlled according to the method according to the invention.
- the at least one slave driver roller pair 116 is torque-controlled with the aid of the slave torque controller 144. This means that the actual torque of its rollers is regulated to a predetermined target torque.
- the casting-rolling plant 100 can not only be operated in the said endless operating mode, in which the casting strand 20 has entered at least a first roll stand 122 of the rolling mill 120 and is rolled by the roll stand 122. Before this endless operating mode, the casting-rolling plant can be operated in a start-up mode in which the casting strand 20 is cast in the casting plant 110 and conveyed up to the first roll stand 122 of the rolling plant.
- the casting speed can be regulated according to the two embodiments described above with reference to Figures 1 and 2.
- the target casting speed for the master driver roller pair 118 is then specified to be the same amount and constant over time in the start-up mode and in the endless operating mode.
- At least one pair of slave driver rollers can be provided not only in the casting system 110, but also in the rolling system 120.
- a slave driver roller pair is typically formed by the work rolls 124 of the roll stand 122, in particular by the work rolls of the first roll stand 122 provided in the casting direction G. It also applies to these slave driver roller pairs in the rolling mill that they are not according to the method according to the invention can be regulated to the casting speed. Rather, they are torque-controlled during the endless operating mode, i.e., the actual torque of the rollers of the slave driver roller pair 124 in the rolling stand is adjusted or regulated to a predetermined target torque.
- the torques are regulated for the rollers of the slave driver roller pairs 116 in the strand guide 14 and/or for the rollers of the slave driver roller pairs 124 in the rolling mill 120, preferably by suitable variation of the current in the drives of the rollers.
- the current is used as a manipulated variable for the Drives then varied so that the actual torque is adapted or regulated to the desired or specified target torque.
- the control of the torque in the rollers of the slave driver roller pairs of the strand guide 114 and/or in the rolling mill 120 can also be carried out by suitable variation of the speed of these rollers as a manipulated variable. That is, the respective responsible torque controller 144, 146 specifies a suitable variation of the speed as a manipulated variable for the rollers of the relevant slave-driver roller pair and the current in the drives is then adjusted accordingly to realize the required variation in speed.
- the speed varied as a manipulated variable can be maintained at the speed specified in the variation at least in one of the torque controls 144, 146 with the aid of a subordinate speed control 148.
- the varied speed as a manipulated variable and the optional subordinate speed control in the superimposed torque control advantageously ensure that the casting strand 20 does not bulge between the casting system 110 and the first roll stand 122. It is also advantageously prevented that too much tension is built up in the casting strand 20 between the casting system 110 and the first roll stand 122 and that one of the drives of the slave driver roller pairs 116, 124 slips. They rise
- the first roll stand 122 must rotate faster, i.e. a higher speed must be specified as a manipulated variable. Conversely, if the drive torques of the driver roller pairs 116 in the casting system 110 fall, the first roll stand 122 must rotate correspondingly more slowly, i.e. a smaller speed must be specified as the manipulated variable.
- the target torque for the work rolls 124 of the preferably first rolling stand 122 of the rolling mill 120 can, for example, be the actual Torque can be specified by one of the slave driver roller pairs 116 in the strand guide device 114.
- the target torque for the work rolls 124 can also be specified as the sum torque of at least two, preferably all slave driver roller pairs 116 in the strand guide device 114.
- the total torque is determined by measuring, storing and adding the torques of at least two, preferably all pairs of driver rollers 116 in front of the first roll stand 122 during the start-up mode before the cast casting strand has entered the first roll stand.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022208499.3A DE102022208499A1 (de) | 2022-08-16 | 2022-08-16 | Verfahren und Computerprogrammprodukt zum Betreiben einer Gieß-Walzanlage |
| PCT/EP2023/070505 WO2024037838A1 (de) | 2022-08-16 | 2023-07-25 | VERFAHREN UND COMPUTERPROGRAMMPRODUKT ZUM BETREIBEN EINER GIEß-WALZANLAGE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4572904A1 true EP4572904A1 (de) | 2025-06-25 |
Family
ID=87556468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23750927.8A Pending EP4572904A1 (de) | 2022-08-16 | 2023-07-25 | VERFAHREN UND COMPUTERPROGRAMMPRODUKT ZUM BETREIBEN EINER GIEß-WALZANLAGE |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4572904A1 (de) |
| JP (1) | JP2025526809A (de) |
| CN (1) | CN120018920A (de) |
| DE (1) | DE102022208499A1 (de) |
| WO (1) | WO2024037838A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4650063A1 (de) * | 2024-05-16 | 2025-11-19 | Primetals Technologies Austria GmbH | Endwalztemperatur-einstellung bei der endlosbandproduktion |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56114522A (en) * | 1980-02-13 | 1981-09-09 | Kikai Syst Shinko Kyokai | Speed control method of direct rolling mill |
| JPS58218304A (ja) | 1982-06-14 | 1983-12-19 | Hitachi Ltd | 連続鋳造設備の制御装置 |
| US4727927A (en) * | 1987-01-20 | 1988-03-01 | Hunter Engineering Company, Inc. | Casting machine control |
| DE102004010038A1 (de) * | 2004-03-02 | 2005-09-15 | Sms Demag Ag | Verfahren und Einrichtung zum Antreiben von Stützrollen einer Stranggießmaschine für flüssige Metalle, insbesondere für flüssige Stahlwerkstoffe |
| JP5337571B2 (ja) | 2009-04-28 | 2013-11-06 | 株式会社吉野工業所 | 吐出器 |
| EP3000539B1 (de) * | 2014-09-24 | 2016-11-16 | SMS group GmbH | VERFAHREN ZUM GIEßEN UND WALZEN EINES ENDLOSEN STRANGGUTES |
| IT202000000316A1 (it) | 2020-01-10 | 2021-07-10 | Danieli Off Mecc | Metodo ed apparato di produzione di prodotti metallici piani |
-
2022
- 2022-08-16 DE DE102022208499.3A patent/DE102022208499A1/de active Pending
-
2023
- 2023-07-25 WO PCT/EP2023/070505 patent/WO2024037838A1/de not_active Ceased
- 2023-07-25 EP EP23750927.8A patent/EP4572904A1/de active Pending
- 2023-07-25 JP JP2025507726A patent/JP2025526809A/ja active Pending
- 2023-07-25 CN CN202380071873.9A patent/CN120018920A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024037838A1 (de) | 2024-02-22 |
| JP2025526809A (ja) | 2025-08-15 |
| DE102022208499A1 (de) | 2024-02-22 |
| CN120018920A (zh) | 2025-05-16 |
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