EP4061552A1 - Adjustment of an outlet temperature of a metal strip exiting a rolling train - Google Patents
Adjustment of an outlet temperature of a metal strip exiting a rolling trainInfo
- Publication number
- EP4061552A1 EP4061552A1 EP20797072.4A EP20797072A EP4061552A1 EP 4061552 A1 EP4061552 A1 EP 4061552A1 EP 20797072 A EP20797072 A EP 20797072A EP 4061552 A1 EP4061552 A1 EP 4061552A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- strip
- roll stand
- process model
- metal strip
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 147
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 78
- 239000002184 metal Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 claims abstract description 94
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 24
- 239000002826 coolant Substances 0.000 claims abstract description 15
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 abstract 4
- 239000000463 material Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2271/00—Mill stand parameters
- B21B2271/02—Roll gap, screw-down position, draft position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
Definitions
- the invention relates to a method and a control device for setting an exit temperature of a metal strip exiting from an at least two-stand rolling train.
- the invention relates to a rolling plant for rolling a metal strip, having at least one at least two-stand rolling train and at least one control device for setting an outlet temperature of the metal strip emerging from the rolling train.
- Metal strips are rolled to the desired outlet thickness in rolling mills.
- the metal strip coming out of a rolling train is reeled into a spool or a coil.
- a temperature of the reeled metal strip is of importance for the quality of the respective metal strip, in particular for metal strips made of certain aluminum alloys.
- the temperature of such a metal strip must be kept within a relatively narrow temperature range in order to achieve specified mechanical properties of the metal strip.
- DE 20 2014 011 231 U1 relates to a system with a first frame having a first pair of work rolls for reducing a thickness of a material to a first fixed point, a second frame having a second pair of work rolls for reducing the thickness of the material has a second fixed point and a temperature sensor positioned to measure the temperature of the material as it exits the second rack.
- the system has a control unit which is coupled to the temperature sensor, the first frame and the second frame in order to adapt at least one of the first specified point and the second specified point on the basis of the temperature of the material measured by the temperature sensor, with the it emerges from the second frame.
- EP 2 697 002 B1 relates to a control method for a rolling train, wherein a temperature is determined for each strip section of a strip in front of a first roll stand of the rolling train, which the strip sections have, using a strip model based on the determined temperatures, the temperatures of the strip sections for the time of Rolling of the respective strip section in the first roll stand can be predicted, with at least one respective control parameter for the rolling of the strip sections in the first roll stand being determined using the predicted temperatures of the strip sections, and wherein an adjusting device acting on the first roll stand during the rolling of the respective strip section is controlled taking into account the respective determined control parameter.
- the temperatures of the strip sections are forecast for the point in time when the respective strip section is rolled in the first roll stand by means of the strip model with a first forecast horizon.
- the first forecast horizon corresponds to several strip sections to be rolled in the first roll stand.
- a manipulated variable curve is used for the actuating device.
- a profile of a roll gap formed by work rolls of the first roll stand is influenced by the manipulated variable curve.
- a respective roll gap profile is predicted that the work rolls of the first roll stand form at the time of rolling of the respective strip section.
- the set course of the manipulated variable is optimized on the basis of the roll gap profile forecast for the strip sections and a respective target profile.
- the current value of the optimized manipulated variable curve corresponds to the control parameter and is given to the adjusting device as a manipulated variable.
- EP 3 089 833 B1 relates to a system with a first stand which has a first pair of work rolls to reduce a thickness of a material to a first set point, a second stand which has a second pair of work rolls to reduce the thickness of the material to reduce to a second set point, and one Temperature sensor arranged to measure the temperature of the material as it leaves the second post.
- the system has a controller, which is coupled to the temperature sensor, the first stand and the second stand, to at least one of the first set point and the second set point based on the temperature of the material measured by the temperature sensor, such as the second stand leaves to discontinue.
- One object of the invention is to create a more cost-effective, realizable method for setting an outlet temperature of a metal strip exiting a rolling train, with which a metal strip of higher quality can be produced.
- the exit temperature is determined by means of a process model, taking into account a relationship between strip deformation and / or a cooling rate of the metal strip by at least one cooling medium and by at least one fixed rolling train component and / or one Rolling speed set in a last roll stand of the rolling train on the one hand and the outlet temperature on the other hand.
- a deviation due to the intervention is made using the process model
- the associated deviation of the outlet temperature from a setpoint temperature contained in the context is determined, with the strip deformation in the last roll stand and in one or more upstream roll stands of the rolling train being changed by means of the process model as a function of the deviation in the outlet temperature in such a way that the outlet temperature corresponds to the setpoint temperature.
- the rolling speed in the last roll stand of the rolling train on the one hand and the run-out temperature, in particular at the respective working point, on the other hand can be calculated by means of a superordinate pass schedule computer.
- An operating point is understood to mean all setting values (relating to the physical properties of deformation, thickness, speed, temperature) of an area within which rolling is carried out (target pass schedule), as well as the areas in between that are passed through to reach the area. It can be one or as many Working points are taken into account. Four working points are particularly favorable for the purposes of the invention, since they contain all the important corner points of the rolling process without requiring too much computing time to determine them.
- the pass schedule calculator is set up to define this relationship as the setting state and to transfer coefficients corresponding to the setting state to the (mathematical) process model.
- the pass schedule computer can be set up to transfer corresponding coefficients to a device for controlling actuators of the rolling train.
- coefficients can consist of one or more terms or of terms combined from them of the quantities listed below as examples: dP dF dM dv dQ dTf dAh df v dl vn 3DG '3DG' 3DG '3DG' 3DG '3DG' 3DG '3DG' 3DG '3DG' 3DG '3DG' 3DG '3DG' 3DG '3DG' 3DG ' 3DG' 3DG ' 3DG' 3DG ' 3DG' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG ' 3DG
- T is the temperature
- P is the rolling power
- F is the rolling force
- M is the rolling torque
- v is the rolling speed
- T f is the fluid temperature
- Q is the fluid volume flow
- h is the thickness of the rolling stock
- Ah is the decrease
- IVN is the length of a strip at constant strip speed and f v the advance.
- the cooling medium can be, for example, air, water, oil or an emulsion.
- the rolling train component can be, for example, a roller or a work roll.
- the process model can be set up to monitor directly or indirectly whether a current state of the rolling train corresponds to the setting state. If this set state is not achieved during rolling operation through other controller interventions or if the strip deformation and / or the cooling rate of the metal strip changes due to the application of a cooling medium to the metal strip and the contact of the metal strip with at least one fixed rolling train component and / or the rolling speed in the roll gap of the last roll stand, for example due to the intervention of an operating staff, the process model according to the invention can use the coefficients supplied by the pass schedule computer to calculate the deviation of the strip deformation and / or the rolling speed in the last roll stand from those in the context contain setting values for the strip deformation and / or the rolling speed in the last roll stand to determine a deviation associated with the intervention-related deviation of the outlet temperature from a setpoint temperature contained in the context.
- the process model is also set up to change the strip deformation in the last roll stand and in one or more upstream roll stands of the rolling train with respect to a strip conveying direction through the rolling train depending on the determined deviation of the outlet temperature in such a way that the outlet temperature corresponds to the target temperature.
- the exit temperature of the metal strip is set by means of the process model, taking into account the relationship described above.
- the process model can change the strip forming and / or the rolling speed and / or the cooling rate or the associated amount of coolant in the last roll stand and the one or more upstream roll stands so that the run-out temperature of the metal strip returns to the target temperature.
- the metal band can be, for example, an aluminum band or a steel band.
- the rolling train can be, for example, a cold rolling tandem train.
- the last rolling stand of the rolling train is the last rolling stand with regard to a mass flow or a direction of movement of the metal strip through the rolling train.
- the rolling train has at least two, three or more rolling stands.
- the direction of movement of the metal strip through the rolling train can also change, e.g. B. with a reversing stitch.
- the model-based temperature setting according to the invention has the advantage that, ideally, it does not require any sensor system. This reduces investment, commissioning and maintenance costs. A simple off-line temperature measurement on the wound coil would be sufficient for process model validation.
- the process model also ensures that temperature setting and thickness control are decoupled, so that the quality of the end product can be increased by minimizing mutual interference between different controls.
- the dynamics of the temperature setting is at a consistently high level for different products thanks to the process model.
- the invention thus represents a model-based approach of a temperature setting fully integrated in a rolling mill control architecture, which compared to the prior art with a lower investment requirement, for example due to the elimination of the expensive thermal imaging camera usual for aluminum strips, lower commissioning costs, lower operating costs, in particular maintenance costs and replacement costs , higher control quality and dynamics, better product quality and greater reliability.
- An essential advantage of the invention compared to a conventional temperature controller is that the outlet temperature can be set at an earlier point in time in the rolling process, particularly in the case of a system in batch operation.
- the method according to the invention works more evenly over the length of the strip and is more dynamic, since the process data are determined directly in the roll gap and are not subject to dead time due to the transport to the temperature measuring point. It is also advantageous that the method according to the invention allows higher rates of change over time for setting the target temperature.
- a change in a decrease in a strip thickness of the metal strip in the last roll stand required to achieve the target temperature is determined by means of the process model and a roll gap height in one or more upstream roll stands by one of the change in the strip thickness of the metal strip in the amount corresponding to the last roll stand changed in the opposite direction. If, for example, the rolling speed of the pass plan or the setting state calculated by the pass plan computer is not reached, the run-out temperature of the metal strip is too low.
- the process model can then increase the strip deformation in the last roll stand in order to achieve a desired run-out temperature of the metal strip even at the lower rolling speed. With the change of the band forming in the However, the last roll stand alone would disturb the target thickness of the metal strip.
- a thickness control of the rolling train would correct this change in thickness and restore the initial state.
- the process model also uses the coefficients supplied by the pass schedule calculator to calculate a required change in the strip forming in one or more upstream roll stands, so that, together with the strip forming in the last roll stand, required to set the desired exit temperature of the metal strip, the desired exit thickness of the metal strip remains unchanged remains. For example, if the process model calculates a percentage change in the decrease or reduction in the thickness of the metal strip in the last roll stand of + 15% required to achieve the desired exit temperature of the metal strip, the decrease or reduction in the thickness of the metal strip in one or more upstream roll stands will be as follows compensates for the fact that the total decrease remains constant.
- the strip thickness of the metal strip is initially reduced, for example, from 0.4 mm to 0.3 mm in the penultimate roll stand and from 0.3 mm to 0.2 mm in the last roll stand, and there is a previously mentioned deviation in the run-out temperature of the metal strip, this can be the case
- Process model change the strip deformation using the last two roll stands in such a way that the strip thickness with the penultimate roll stand is reduced from 0.4 mm to 0.345 mm and with the last roll stand from 0.345 mm to 0.2 mm, so that the outlet thickness of the metal strip is not affected becomes.
- the respective manipulated variable is the roll gap height of the respective roll stand calculated by the process model.
- a separate stand model contained in the process model is used for the last roll stand and for one or more upstream roll stands, which is adapted at time intervals by pressing the respective roll stand without a metal strip.
- the (mathematical) framework model is a framework model that is calibrated by the impression (calibration process). During the pressing, the work rolls of the respective roll stand are brought into contact with one another, wherein travel distances, forces and the like can be recorded, for example by means of the process model, in order to adapt the stand model.
- a cooling model contained in the process model is used with which cooling of the metal strip is calculated by optionally applying various coolants and cooling of the metal strip due to contact with work rolls.
- the various coolants can be, for example, air, water, oil or an emulsion.
- the contact of the metal strip with the work rolls creates a heat flow through which heat flows away from the metal strip via the work rolls, so that the metal strip is cooled.
- the cooling model can take into account flow temperatures, volume flows and dwell times in the relevant system parts.
- the cooling capacity can be calculated using coefficients that are determined by the pass schedule calculator.
- an inlet temperature level of a coil from the metal strip is taken into account in the process model before it enters the rolling train. This information is also required for setting up the system. A distinction must primarily be made here as to whether it is a coil that has cooled to room temperature or a coil that has been heated above room temperature due to hot rolling or annealing processes. This can be done by a manual or inline temperature measurement in the inlet to the rolling train or by calculating the
- Cooling takes place on the basis of data from process steps over time from production planning.
- changes in the strip deformations in the last roll stand and one or more upstream roll stands are pre-controlled by means of a tracking module by shifting the respective change in strip thickness into the respective roll stand with a respective measured strip speed.
- the tracking module ensures that the variations of the manipulated variables calculated by the coefficients in downstream rolling stands take place at the correct time, so that when the correct outlet temperature is set, there are no thickness errors at any point in time.
- the tracking module can be used in a transient area in which the thickness of the Metal strip changes, redistribute the strip deformation in the roll gaps of the last roll stand and one or more upstream roll stands so that a desired outlet thickness of the metal strip is not disturbed.
- the temperature change due to the rolled strip length is determined as a function of the strip speed by means of the process model. According to a further advantageous embodiment, changes are made to
- Roll gap heights in the last roll stand and one or more upstream roll stands by means of the process model by changing the speeds of work rolls of the last roll stand or the one or more upstream roll stands, the speeds being compensated for using a mass flow determined or contained in the process model Rolling train can be determined.
- the changes in lead and strip thickness can be pre-controlled by the deformation redistribution in such a way that, ideally, the thickness control behind the last roll stand does not cause any disruption. This can be achieved, for example, in that a change in the pitch in the last roll stand and in one or more upstream roll stands is compensated for by the change in speed corresponding to the mass flow in the roll stand (s) concerned. As a result, a strip tension remains unchanged, regardless of whether a tension control acts on the pitch or the stand speed.
- the process model is used to detect changes in advance of the metal strip when the strip speed is corrected taken into account when the process model has determined a deviation in the strip deformation and / or the rolling speed in the last roll stand due to the intervention of an actuator of another control device of the rolling train.
- the changes in lead can be taken into account in the speed correction, for example, via the difference quotients of the pass schedule model. If the process model detects a deviation of the strip forming from the set state due to an intervention by an actuator, for example a thickness control or tension control, the process model can switch on the speed correction in an analogous manner.
- the process model can work continuously and the strip deformation can be continuously distributed between the roll stands and, in addition, changes in advance can be controlled, in the ideal case there is no disturbance of the desired outlet thickness of the metal strip. If, for example, the decrease in the last roll stand is less than planned in the settlement (input variables: run-out thickness, rolling torque and rolling force in the last roll stand), then the decrease in one or more upstream roll stands is reduced so that the decrease in the last roll stand can be increased. The greater deformation then leads to the desired increase in the outlet temperature.
- the changes in speed and advance that occur during the relocation are pre-controlled by the changed mass flow balance and advance coefficient d advance / d decrease in the roll stands concerned, so that there are no tension and thickness disturbances during the relocation.
- the relationship between the strip deformation and / or the cooling rate of the metal strip by at least one cooling medium and by at least one fixed rolling train component and / or the rolling speed in the last roll stand on the one hand and the outlet temperature on the other hand with the help of temperature measurements on the one from the rolling train adapted to the outgoing metal band.
- the actual coil temperature can be measured, for example, with a hand-held measuring device at the end of a rolling program.
- Inline temperature measurement is more convenient but more complex.
- the measured values of the respective temperature measurement can be automatically sent to the pass schedule calculator, which is the calculated and compares the measured temperature with a calculated temperature value and adapts the calculated temperature value to the measured value.
- Other model parameters can also be adapted here.
- a control device for setting an outlet temperature of a metal strip exiting from an at least two-stand rolling train is set up to carry out the method according to one of the above-mentioned configurations or a combination of at least two of these configurations with one another
- control device can be provided as a separate device or implemented by software implementation in the existing system electronics of a rolling mill.
- the control device can be used as a predictive temperature controller of a rolling mill on the basis of a process model.
- a rolling plant according to the invention for rolling a metal strip has at least one rolling train with at least two stands and at least one above-mentioned control device for setting an outlet temperature from the
- Tandem rolling mill exiting metal strip
- the rolling mill can be designed as a multi-stand cold rolling tandem mill, in particular for the production of
- FIG. 1 shows a schematic representation of an exemplary embodiment for a rolling mill according to the invention
- FIG. 2 shows a schematic representation of a further exemplary embodiment for a rolling mill according to the invention
- FIG. 3A shows a schematic representation of a framework model of an exemplary embodiment for a process model according to the invention
- FIG. 3B shows a schematic representation of a cooling model of an exemplary embodiment for a process model according to the invention.
- FIG. 3C shows a schematic representation of a tracking module of an exemplary embodiment for a process model according to the invention.
- FIG. 1 shows a schematic representation of an exemplary embodiment of a rolling plant 1 according to the invention for rolling a metal strip 2.
- the rolling plant 1 has a three-stand rolling train 3 and a symbolically shown control device 4 for setting an outlet temperature of the metal strip 2 emerging from the rolling train 3.
- the control device 4 is set up to carry out a method according to the invention for setting the exit temperature of the metal strip 2 exiting from the rolling train 3.
- Pi is the nominal rolling capacity of the first roll stand 5 and P is the actual rolling capacity of the first roll stand 5.
- hio is the entry thickness of the rolled strip 2 entering the first roll stand 5 and hu is the exit thickness of the rolled strip 2 exiting the first roll stand 5, where Ahi is the decrease in the thickness of the Rolled strip 2 in the first roll stand 5 is.
- vi is the strip speed of the rolled strip 2 leaving the first roll stand 5 and S 12 is the strip tension in the rolled strip 2 between the first roll stand 5 and a second roll stand 6 connected downstream of the first roll stand 5.
- P 2 is the target rolling capacity of the second roll stand 6 and P ' 2 is the actual rolling capacity of the second roll stand 6.
- h 20 is the entry thickness of the rolled strip 2 entering the second roll stand 6 and h 2i is the exit thickness of the one leaving the second roll stand 6 Rolled strip 2, where ⁇ h 2 is the decrease in the thickness of the rolled strip 2 in the second roll stand 6.
- v 2 is the strip speed of the rolled strip 2 leaving the second roll stand 6 and S 23 is the strip tension in the rolled strip 2 between the second roll stand 6 and a third or last roll stand 7 downstream of the second roll stand 6,
- P 3 is the target rolling capacity of the third Roll stand 7 and P ' 3 the actual rolling capacity of the third roll stand 7.
- h 30 is the inlet thickness of the rolled strip 2 entering the third roll stand 7 and h 3i is the outlet thickness of the rolled strip 2 exiting the third roll stand 7, where Ah 3 is the decrease is the thickness of the rolled strip 2 in the third roll stand 7.
- v 3 is the strip speed of the rolled strip 2 leaving the third roll stand 7.
- T is the target temperature of the cold or hot strip 2 leaving the rolling train 3 and T is the actual temperature of the cold or hot strip 2 leaving the rolling train 3, where DT is the temperature difference between the target temperature and the actual T emperature is.
- FIG. 2 shows a schematic representation of a further exemplary embodiment for a rolling plant according to the invention for rolling a metal strip, not shown, only a pass schedule computer 8 and the process model 9 of the rolling mill are shown with reference to a rolling stand n.
- the pass schedule computer 8 is supplied with an inlet temperature TO of the hot strip, an outlet temperature T of the hot strip, a decrease in thickness Ah within the roll stand n and material and system data A.
- the pass schedule computer 8 uses this to determine the coefficients and setting values shown on the right in FIG. 2, which are fed together to the process model 9.
- the process model 9 also receives the current rolling power P (n) of the roll stand n, a current rolling torque M (n) of the roll stand n, a current rolling force F (n) of the roll stand n, a current rolling speed v (n) of the roll stand n, a current rolling deformation Ah (n) in the roll stand n, a current one
- the process model 9 is optionally supplied with calibration curves K (n) of the roll stand n and optionally a measured actual temperature T. From this, the process model 9 determines a rolling speed change Av (n) over time t and a decrease change Ah (n) over time t for the roll stand n.
- the process model 9 has a stand model 10, a cooling model 11 and a tracking module 12 .
- FIG. 3A shows a schematic representation of a framework model 10 of an exemplary embodiment for a process model according to the invention.
- the current rolling force F (n) of a rolling stand n and a current rolling deformation Ah (n) in the rolling stand n are fed to the stand model 10.
- a framework module G (n) and a belt module B (n) are fed to the framework model 10. From this, the stand model 10 determines a pitch position deviation As (n) from a setting value s (n) of the roll stand n.
- the stand model 10 can be implemented in the process model from FIG.
- FIG. 3B shows a schematic illustration of a cooling model 11 of an exemplary embodiment for a process model according to the invention.
- the cooling model 11 a current rolling speed v (n) of the roll stand n, a current coolant temperature Tf (n) at the roll stand n and a current one
- Coolant volume flow Q (n) supplied to the roll stand n Furthermore, the cooling model 11 is supplied with system data A (n). From this, the cooling model 11 determines a strip temperature deviation DT (h) from a set value T (n) on the roll stand n.
- the cooling model 11 can be implemented in the process model from FIG.
- FIG. 3C shows a schematic representation of a tracking module 12 of an exemplary embodiment for a process model according to the invention.
- the tracking module 12 receives those determined from the framework model from FIG. 3A
- system data A (n) are fed to the tracking module 12. From this, the tracking module 12 determines a change in the rolling speed Dn (h) over time t and a change in decrease DIp (h) over time t for the roll stand n.
- the tracking module 12 can be implemented in the process model from FIG.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019217966.5A DE102019217966A1 (en) | 2019-11-21 | 2019-11-21 | Setting a run-out temperature of a metal strip running out of a rolling train |
PCT/EP2020/079634 WO2021099052A1 (en) | 2019-11-21 | 2020-10-21 | Adjustment of an outlet temperature of a metal strip exiting a rolling train |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4061552A1 true EP4061552A1 (en) | 2022-09-28 |
EP4061552B1 EP4061552B1 (en) | 2023-06-28 |
Family
ID=73014499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20797072.4A Active EP4061552B1 (en) | 2019-11-21 | 2020-10-21 | Method, control device and rolling mill for the adjustment of an outlet temperature of a metal strip exiting a rolling train |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4061552B1 (en) |
DE (1) | DE102019217966A1 (en) |
WO (1) | WO2021099052A1 (en) |
Families Citing this family (1)
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TWI763578B (en) * | 2021-08-04 | 2022-05-01 | 中國鋼鐵股份有限公司 | Prediction method of rough-rolling outlet temperature of billet steel |
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JPS63168211A (en) * | 1986-12-27 | 1988-07-12 | Sumitomo Metal Ind Ltd | Temperature control method for hot rolling process |
JP2823964B2 (en) | 1991-01-30 | 1998-11-11 | 株式会社日立製作所 | Protective device for thickness gauge between rolling mill stands |
GB9317928D0 (en) * | 1993-08-26 | 1993-10-13 | Davy Mckee Poole | Rolling of metal strip |
DE19823986A1 (en) | 1998-05-29 | 1999-12-02 | Alcatel Sa | Procedure for determining the rolling force |
JP2000210708A (en) * | 1999-01-21 | 2000-08-02 | Toshiba Corp | Rolling material temperature control method and rolling material temperature controller in roll mill outlet side |
DE10156008A1 (en) | 2001-11-15 | 2003-06-05 | Siemens Ag | Control method for a finishing train upstream of a cooling section for rolling hot metal strip |
ATE360483T1 (en) | 2003-02-25 | 2007-05-15 | Siemens Ag | METHOD FOR CONTROLLING THE TEMPERATURE OF A METAL STRIP, IN PARTICULAR IN A FINISHING LINE FOR ROLLING METAL HOT STRIP |
JP2006281232A (en) | 2005-03-31 | 2006-10-19 | Jfe Steel Kk | Method for controlling height of checkered mark of checkered plate in continuous hot finishing mill |
EP2346625B2 (en) | 2008-10-30 | 2021-02-17 | Primetals Technologies Germany GmbH | Method for setting a run-off thickness for a milled item that passes through a multiple scaffold mill train, control and/or regulating device and mill train |
DE102009030792A1 (en) | 2008-12-18 | 2010-06-24 | Sms Siemag Ag | Method for calibrating two cooperating work rolls in a rolling stand |
EP2386365A1 (en) | 2010-05-06 | 2011-11-16 | Siemens Aktiengesellschaft | Operational method for a finishing train with prediction of transport speed |
EP2428288B1 (en) | 2010-09-08 | 2013-04-17 | Siemens VAI Metals Technologies GmbH | Method for producing steel bands using continuous casting or semi-continuous casting |
EP2431104A1 (en) | 2010-09-16 | 2012-03-21 | Siemens Aktiengesellschaft | Method for determining the temperature and geometry of a hot rolled metal strip in a finishing train in real time |
EP2527054A1 (en) | 2011-05-24 | 2012-11-28 | Siemens Aktiengesellschaft | Operating method for a mill train |
EP2540404A1 (en) | 2011-06-27 | 2013-01-02 | Siemens Aktiengesellschaft | Operating method for a hot strip mill |
JP6069877B2 (en) | 2012-04-19 | 2017-02-01 | Jfeスチール株式会社 | Rolling method in cold tandem rolling mill and control device for cold tandem rolling mill |
EP2662158A1 (en) | 2012-05-07 | 2013-11-13 | Siemens Aktiengesellschaft | Method for processing milled goods and milling system |
EP3089833B2 (en) | 2013-12-20 | 2022-08-10 | Novelis Do Brasil LTDA. | Dynamic shifting of reduction (dsr) to control temperature in tandem rolling mills |
US10040107B2 (en) | 2014-02-04 | 2018-08-07 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Temperature control apparatus of hot-rolling mill |
-
2019
- 2019-11-21 DE DE102019217966.5A patent/DE102019217966A1/en active Pending
-
2020
- 2020-10-21 EP EP20797072.4A patent/EP4061552B1/en active Active
- 2020-10-21 WO PCT/EP2020/079634 patent/WO2021099052A1/en unknown
Also Published As
Publication number | Publication date |
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DE102019217966A1 (en) | 2021-05-27 |
EP4061552B1 (en) | 2023-06-28 |
WO2021099052A1 (en) | 2021-05-27 |
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