EP4608575A1 - VERFAHREN ZUM BETRIEB EINES VORBANDKÜHLERS IN EINER WARMBANDSTRAßE, WARMBANDSTRAßE MIT EINEM ZWISCHEN EINEM VORWALZWERK UND EINEM FERTIGWALZWERK ANGEORDNETEN VORBANDKÜHLER - Google Patents
VERFAHREN ZUM BETRIEB EINES VORBANDKÜHLERS IN EINER WARMBANDSTRAßE, WARMBANDSTRAßE MIT EINEM ZWISCHEN EINEM VORWALZWERK UND EINEM FERTIGWALZWERK ANGEORDNETEN VORBANDKÜHLERInfo
- Publication number
- EP4608575A1 EP4608575A1 EP24829140.3A EP24829140A EP4608575A1 EP 4608575 A1 EP4608575 A1 EP 4608575A1 EP 24829140 A EP24829140 A EP 24829140A EP 4608575 A1 EP4608575 A1 EP 4608575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- mill
- roughing
- cooler
- hot
- 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
- 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
- B21B37/76—Cooling control on the run-out table
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
- B21B2261/21—Temperature profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
Definitions
- Page 1/32 Applicant SMS group GmbH Our reference: P80921WO December 16, 2024 Method for operating a transfer strip cooler in a hot strip mill, hot strip mill with a transfer strip cooler arranged between a roughing mill and a finishing mill
- the present invention relates to a method for operating a transfer strip cooler in a hot strip mill for producing hot strip.
- the present invention further relates to a hot strip mill for producing hot strip.
- Hot strip mills for producing hot strip have a roughing mill for rough-rolling a metallic rolling stock into a transfer strip.
- a finishing mill is arranged downstream of the roughing mill in the conveying direction of the metallic rolling stock and the transfer strip, which finish-rolls the transfer strip into hot strip.
- the transfer strip fed to the finishing mill is generally cooled in air and then fed to the finishing mill.
- the finish-rolled hot strip is then generally coiled.
- a pre-strip cooler is located between the roughing mill and the finishing mill. This cooler cools the pre-strip to a specific temperature between individual passes (rolling operations) carried out in the roughing mill during the roughing process.
- Appropriately designed hot strip mills are designed for the production of different hot strips, for example, from metallic rolling stock with different Page 2/32 P80921WO initial thicknesses and possibly different material compositions result, little flexibility.
- the present invention is based on the object of providing a method for operating a pre-strip cooler in a hot strip mill for producing a hot strip, by means of which the productivity of the hot strip mill can be increased and by means of which the material quality of the produced hot strip can be improved.
- This object underlying the present invention is achieved by a method for operating a pre-strip cooler in a hot strip mill for producing a hot strip with the features of claim 1.
- Advantageous embodiments of the method are described in the claims dependent on claim 1.
- the object underlying the present invention is achieved by a method for operating a pre-strip cooler in a hot strip mill for producing a hot strip, wherein the hot strip mill has a roughing mill for receiving a metallic rolling stock and for discharging a pre-strip, a finishing mill for receiving a pre-strip and discharging a hot strip, and a pre-strip cooler which is arranged between the roughing mill and the finishing mill and is designed to cool a pre-strip by applying a cooling fluid discharged via a plurality of cooling fluid nozzles which can be controlled individually or in groups.
- the method has a method step for rough-rolling the metallic rolling stock by means of the roughing mill to form a pre-strip, a method step for cooling the pre-strip by means of the pre-strip cooler, and a method step for finish-rolling the cooled pre-strip to form a hot strip.
- the method according to the invention is characterized in that the cooling of the pre-strip is controlled or regulated by means of the pre-strip cooler in such a way that the Page 3/32 P80921WO
- the pre-strip discharged from the pre-strip cooler has a temperature distribution along its longitudinal extent such that a front section of the pre-strip has a lower temperature than a rear section of the pre-strip.
- the method according to the invention enables more productive, faster operation of a hot strip mill for producing hot strip.
- the pre-strip cooler By controlling or regulating the pre-strip cooler in such a way that the pre-strip discharged from the pre-strip cooler has a temperature distribution such that a front section of the pre-strip has a lower temperature than a rear section of the pre-strip, the pre-strip can be finish-rolled more quickly in the finishing mill at a higher rolling speed to produce hot strip with a desired and/or required final rolling temperature.
- the sections of the preliminary strip downstream of the front section in the conveying direction continue to cool during rolling of the front section, so that their temperature also has a desired low temperature upon entering the finishing mill.
- these sections can also be finish-rolled at a higher rolling speed to produce hot strip with a desired and/or required final rolling temperature. Due to the increase in rolling speed in the finishing mill, a spatial gap to the subsequent rolling stock is increased. As a result, this fundamentally increases the productivity of the finishing mill and thus of the entire hot strip mill (taking into account the product properties, product target data (e.g. final rolling temperature, rolling forces, drive power, penetration impact)) and the possibility of shifting the bottleneck for production planning or for the production control system (pacing). In conjunction with a pass schedule calculation of the roughing mill and the finishing mill, the pacing can then determine an optimum that Page 4/32 P80921WO the respective rolling times in the individual areas are taken into account.
- product target data e.g. final rolling temperature, rolling forces, drive power, penetration impact
- the method according to the invention further has the advantage that the amount of cooling fluid required to achieve a desired temperature distribution of the preliminary strip before it enters the finishing mill is minimized.
- a further advantage of the method according to the invention is that scale formation on the preliminary strip is reduced, thereby reducing the effort required to remove scale from the preliminary strip and/or the hot strip.
- the metallic rolling stock is preferably in the form of a slab.
- the preliminary strip is produced by pre-rolling the metallic rolling stock in the roughing mill.
- the hot strip is produced by rolling the preliminary strip in the finishing mill.
- the roughing mill and/or the finishing mill is/are preferably designed such that they are each designed for reversible rolling or for non-reversible rolling.
- the cooling fluid is preferably water or predominantly water.
- the leading section of the transfer strip is fed to the finishing mill before the trailing section of the transfer strip when the transfer strip is transported in the transport direction of the hot strip mill during the rolling process.
- the leading section of the transfer strip can also be referred to as the first section or the head of the transfer strip.
- the trailing section of the transfer strip can also be referred to as the second section or the tail of the transfer strip.
- Page 5/32 P80921WO The front section preferably comprises the front end of the pre-strip.
- the rear section preferably comprises the rear end of the pre-strip.
- the temperature of a metallic rolling stock and/or a pre-strip and/or a hot strip this is to be understood as a surface temperature and/or a temperature distribution in the thickness direction of the metallic rolling stock and/or the pre-strip and/or the hot strip.
- the determination of a temperature this is to be understood as a measurement and/or a calculation of the temperature, thus in particular also a calculation of a temperature distribution in the thickness direction of the metallic rolling stock and/or the pre-strip and/or the hot strip.
- the calculation of the temperature or the temperature distribution is preferably carried out using the finite element method.
- the roughing mill can also be referred to as a roughing train and/or a roughing mill.
- the finishing mill can also be referred to as a finishing mill and/or a finishing mill.
- the method is preferably designed such that when producing successive hot strips, i.e. a first hot strip produced first and a second hot strip following one after the other, the first roughing strip, from which the first hot bath is produced by finish rolling in the finishing mill, is cooled more intensively. Furthermore, the method is preferably designed such that the first roughing strip is cooled to a lower temperature than the second roughing strip by means of the roughing strip cooling system. This makes it possible for the first roughing strip to be finish-rolled by means of the finishing mill at a higher rolling speed.
- Page 6/32 P80921WO The method is preferably designed such that when producing successive hot strips, i.e.
- the method is designed such that the first roughing strip is cooled to a higher temperature than the second roughing strip by means of the roughing strip cooler. This offers advantages in particular when the second roughing strip requires a longer finish rolling time than the first hot strip.
- the method is preferably designed such that the front section and/or the rear section of the roughing strip are not cooled to a minimum temperature possible for the finish rolling process by means of the roughing strip cooler.
- the correspondingly designed method has the advantage that a processing step following the finish rolling step, e.g.
- a cutting process of the hot strip or a coiling process of the hot strip can be carried out in a simplified manner.
- the method is designed such that the pre-strip is cooled by means of the pre-strip cooler to a minimum temperature possible for the finish rolling process.
- the correspondingly designed method has the advantage that spatial gaps between successive hot strips are enlarged or maximized, so that a roll change of the roughing mill and/or the finish rolling mill is made easier.
- the method is designed such that the cooling of the pre-strip is controlled or regulated by means of the pre-strip cooler in such a way that the pre-strip output from the pre-strip cooler has a temperature along its longitudinal extent which differs from its Page 7/32 P80921WO
- the rear section has a continuously decreasing, preferably strictly monotonically decreasing, more preferably linearly decreasing temperature compared to the front section thereof.
- the correspondingly designed method enables even more productive, since faster, operation of a hot strip mill while simultaneously minimizing the consumption of cooling fluid.
- the method is designed such that the cooling of the transfer strip by means of the transfer strip cooler is controlled or regulated such that the temperature of the front section of the transfer strip has a predetermined minimum temperature upon entry into the finishing mill.
- the correspondingly designed method enables the transfer strip to be rolled into hot strip at a maximum speed in the finishing mill. Consequently, spatial gaps between successive hot strips are enlarged or maximized, so that a roll change in the roughing mill and/or the finishing mill is simplified.
- the predetermined minimum temperature of the transfer strip is selected/calculated such that the hot strip output from the finishing mill has a predetermined minimum temperature.
- the correspondingly designed method has particular advantages when rolling multi-phase steels.
- the method is designed such that the cooling of the transfer strip by means of the transfer strip cooler is controlled or regulated such that the temperature of each section of the transfer strip entering the finishing mill has a predetermined minimum temperature.
- the correspondingly designed method enables the finishing mill to Page 8/32 P80921WO at a constant maximum speed, the roughing strip is rolled into hot strip. Consequently, spatial gaps between successive hot strips are enlarged or maximized, so that a roll change in the roughing mill and/or the finishing mill is made even easier. Furthermore, the correspondingly designed method has the advantage of simplifying the control of the rolling speed of the finishing mill.
- the cooling of the roughing strip by means of the roughing strip cooler is, of course, carried out with knowledge of the distance between the roughing strip cooler and the finishing mill and the transport time of the roughing strip from the roughing strip cooler to the finishing mill. Furthermore, the temperature of the roughing strip and preferably also the ambient temperature are known.
- the method is designed such that the roughing strip cooler is controlled or regulated in such a way that it discharges a decreasing amount of cooling fluid onto the roughing strip via the cooling fluid nozzles over a length of the roughing strip.
- the correspondingly designed method enables further savings in the cooling fluid required for cooling the pre-strip.
- the feature according to which the pre-strip cooler discharges a decreasing amount of cooling fluid onto the pre-strip via the cooling fluid nozzles over the length of the pre-strip results in the front section of the pre-strip being exposed to a larger amount of cooling fluid than the rear section of the pre-strip.
- the method is designed such that it comprises a method step for determining a temperature distribution of the pre-strip discharged from the roughing mill, a method step for calculating a target temperature distribution of the pre-strip before entering the finishing mill, and a method Page 9/32 P80921WO
- the method comprises a further step for calculating a spatially and temporally resolved cooling fluid flow to be discharged from the cooling fluid nozzles onto the pre-strip passing through the pre-strip cooler, based on the determined temperature distribution of the pre-strip discharged from the roughing mill such that the pre-strip has the target temperature distribution after passing through the pre-strip cooler.
- the correspondingly designed method enables an even more precise adjustment of the temperature distribution of the pre-strip before entering the finishing mill. Consequently, the correspondingly designed method enables the production of hot strip with improved quality.
- the temperature distribution is preferably determined by calculating the temperature distribution.
- the temperature distribution is preferably calculated using the finite element method.
- the temperature distribution can also be determined, for example, using one or more measurements and/or by calculating it using a simulation model.
- the temperature distribution of the pre-strip is preferably a temperature distribution in the longitudinal direction and/or in the thickness direction of the pre-strip.
- the temperature distribution of the transfer strip is a temperature distribution in the width direction of the transfer strip.
- Calculating the target temperature distribution of the transfer strip before entering the finishing mill means that the target temperature distribution of the transfer strip is calculated for the situation in which the transfer strip has left the transfer strip cooler. Consequently, the target temperature distribution is calculated for the transfer strip located between the transfer strip cooler and the finishing mill.
- Page 10/32 P80921WO the method is designed such that the determination of the temperature distribution of the preliminary strip output from the roughing mill is based on a calculated temperature distribution of the metallic rolling stock before entering the roughing mill.
- the correspondingly designed method enables an even more precise adjustment of the temperature distribution of the preliminary strip before entering the finishing mill. Consequently, the correspondingly designed method enables the production of hot strip with an even better quality.
- the calculation of the temperature distribution of the metallic rolling stock before entering the roughing mill is preferably carried out using the finite element method.
- the temperature distribution of the metallic rolling stock is preferably a temperature distribution in the longitudinal direction and/or in the thickness direction of the metallic rolling stock. Further preferably, the temperature distribution of the metallic rolling stock is a temperature distribution in the width direction of the metallic rolling stock.
- the method is designed such that the determination of the temperature distribution of the pre-strip output from the roughing mill is based at least partially on at least one measured temperature of the metallic rolling stock before entering the roughing mill.
- the correspondingly designed method enables an even more precise adjustment of the temperature distribution of the pre-strip before entering the finishing mill. Consequently, the correspondingly designed method enables the production of hot strip with improved quality.
- the temperature distribution of the pre-strip output from the roughing mill is calculated using a finite element method, with the measured temperature of the metallic rolling stock before entering the roughing mill serving as the basis.
- the method is designed such that the calculation of the target temperature distribution of the pre-strip before entering the finishing mill is based on a predetermined minimum temperature distribution of the hot strip to be output from the finishing mill.
- the correspondingly designed method enables the pre-strip to be rolled into hot strip at a maximum speed in the finishing mill. Consequently, spatial gaps between successive hot strips are enlarged or maximized, thus simplifying roll changes in the roughing mill and/or the finishing mill.
- Calculating the target temperature distribution of the preliminary strip before entering the finishing mill requires information about the finishing rolling process, such as the number of rolling passes, the temperature of the rolls in the finishing mill, and the rolling speed in the finishing mill.
- the method is designed such that the method comprises a method step for determining a rolling speed at which the preliminary strip is rolled in the finishing mill, and a method step for calculating the target temperature distribution of the preliminary strip before entering the finishing mill based on the rolling speed in the finishing mill.
- the correspondingly designed method enables further improved utilization of a hot strip mill in which a preliminary strip cooler is installed.
- the rolling speed at which the preliminary strip is rolled in the finishing mill Page 12/32 P80921WO
- the preliminary strip is cooled just enough so that the hot strip leaves the finishing mill at the desired or required temperature.
- This specially designed process also enables further savings in the amount of cooling fluid used.
- the rolling speed can be an actual rolling speed or a maximum possible rolling speed of the finishing mill.
- the rolling speed in the last pass is particularly important for calculating the target temperature and thus the amount of cooling fluid to be applied.
- the method is designed such that the method comprises a method step for determining a roughing time within which the metallic rolling stock is rough-rolled in the roughing mill to the roughing strip, and a method step for calculating the target temperature distribution of the roughing strip before entering the finishing mill under the condition that a roughing strip having the target temperature distribution can be finish-rolled to hot strip in the finishing mill within a finishing time that corresponds to the roughing time.
- the correspondingly designed method is particularly advantageous for identical successive rolled goods/rolled products.
- the roughing time is the occupancy time of the roughing mill during the rough-rolling of the metallic rolling stock to the roughing strip.
- the finishing time is the occupancy time of the finishing mill during the finish-rolling of the roughing strip to the hot strip.
- the method is designed such that the method comprises a method step for determining a geometric Page 13/32 P80921WO
- a preliminary strip output from the roughing mill has a deviation from a target geometry of the preliminary strip
- the process step of cooling the preliminary strip is carried out taking into account the geometric deviation of the preliminary strip in such a way that a top and a bottom side of the preliminary strip are exposed to cooling fluid in such a way that targeted mechanical stresses are induced in the preliminary strip, which cause the preliminary strip to deform in the direction of the target geometry.
- the correspondingly designed process has the advantage that it leads to a significant reduction in cambering of the preliminary strip and thus of the hot strip. For example, asymmetric cooling of the preliminary strip with respect to the longitudinal axis of the preliminary strip is also possible.
- the geometric deviation of the preliminary strip output from the roughing mill from a target geometry can be determined, for example, with the aid of an optical sensor.
- the method is designed such that the method comprises a method step for determining a temperature distribution of the pre-strip output from the roughing mill in the width direction of the pre-strip, wherein based on the determined temperature distribution in the width direction, the method step of cooling the pre-strip by means of the pre-strip cooler is carried out in such a way that the pre-strip output from the pre-strip cooler has a temperature distribution along its width direction that is symmetrical with respect to a longitudinal axis of the pre-strip.
- the correspondingly designed method has the advantage that the further processing of the correspondingly cooled pre-strip is improved.
- the method is designed such that the method has a method step for determining a width extension of the transfer strip and a method step for controlling the cooling fluid nozzles such that the cooling fluid nozzles only discharge cooling fluid onto the transfer strip.
- the correspondingly designed method reduces the amount of cooling fluid required to cool the transfer strip.
- the cooling fluid nozzles are controlled by switching off cooling fluid nozzles located at the edge. Further preferably, the cooling fluid nozzles are controlled by shading the edges of cooling fluid nozzles located at the edge. Further preferably, the control of the cooling fluid nozzles is realized by blowing off cooling fluid that is discharged from edge-side cooling fluid nozzles.
- the object underlying the present invention is further achieved by a computer program product comprising program code means suitable for carrying out the steps of one of the previously described methods when the computer program product is executed on a computing device.
- the object underlying the present invention is further achieved by a hot strip mill for producing a hot strip, wherein the hot strip mill comprises - a roughing mill for receiving a metallic rolling stock and for discharging a roughing strip, Page 15/32 P80921WO - a finishing mill for receiving a pre-strip and for outputting a hot strip, - a pre-strip cooler, which is arranged between the roughing mill and the finishing mill and is designed to cool a pre-strip by applying a cooling fluid output via a plurality of cooling fluid nozzles that can be controlled individually or in groups, - and a control device that is data-coupled to the pre-strip cooler for outputting control signals, wherein the hot strip mill is designed to carry out one of the methods described above.
- the hot strip mill has at least one temperature detection device, which is arranged between an output of the roughing mill and an input of the pre-strip cooler and is designed to determine a temperature of the pre-strip output from the roughing mill, wherein the hot strip mill is designed to carry out the following method steps: - determining a temperature distribution of the pre-strip output from the roughing mill; - Calculating a target temperature distribution of the pre-strip before entering the finishing mill; - Calculating a spatially and temporally resolved cooling fluid flow to be discharged from the cooling fluid nozzles onto the pre-strip passing through the pre-strip cooler, based on the determined temperature distribution of the pre-strip discharged from the roughing mill, such that the pre-strip exhibits the target temperature distribution after passing through the pre-strip cooler.
- Figure 1 a schematic cross-sectional view of a hot strip mill according to the invention
- Figure 2 a perspective view of a pre-strip
- Figure 3 a process flow diagram of a process according to a first embodiment of the present invention
- Figure 4 a process flow diagram of a process according to a second embodiment of the present invention
- Figure 5 a process flow diagram of a process according to a third embodiment of the present invention
- Figure 6 a process flow diagram of a process according to a fourth embodiment of the present invention
- Figure 7 a process flow diagram of a process according to a fifth embodiment of the present invention
- Figure 8 a process flow diagram of a process according to a sixth embodiment of the present invention
- Figure 9 a process flow diagram of a process according to a seventh embodiment of the present invention.
- Figure 1 shows a hot strip mill 100 for producing a hot strip 60.
- the hot strip mill 100 has a roughing mill 10 for receiving a metallic rolling stock 40 and for outputting a pre-strip 50.
- the metallic rolling stock 40 can be designed, for example, as a slab 40.
- the roughing mill 10 has several rolling stands with several pairs of rolls.
- the hot strip mill 100 further has a finishing mill 30 for receiving the pre-strip 50 and for outputting a hot strip 60.
- the finishing mill 30 also has several rolling stands with several pairs of rolls.
- the hot strip mill 100 further has a pre-strip cooler 20, which is arranged between the roughing mill 10 and the finishing mill 30.
- the pre-strip cooler 20 is designed to cool a pre-strip 50 by applying a cooling fluid discharged via a plurality of cooling fluid nozzles 21 that can be controlled individually or in groups.
- the hot strip mill 100 has a control device 80, which is data-coupled to the pre-strip cooler 20 for outputting control signals.
- the control device 80 is designed as an electronic control device 80 and can also be referred to as a computing device 80.
- the control device 80 is further data-coupled to the roughing mill 10 and to the finishing mill 30, so that, on the one hand, control signals can be transmitted from the control device 80 to the roughing mill 10, the pre-strip cooler 20 and the finishing mill 30, and, on the other hand, operating parameters of Page 18/32 P80921WO roughing mill 10, the pre-strip cooler 20, and the finishing rolling mill 30 can be transmitted to the control device 80.
- the hot strip mill 100 shown in Figure 1 has a temperature detection device 70 designed to determine a temperature of a pre-strip 50 output from the roughing mill 10.
- the temperature detection device 70 is designed as a pyrometer 70; however, the present invention is not limited to a corresponding design of the temperature detection device 70.
- the temperature detection device 70 is data-coupled to the control device 80 for transmitting temperature measurement data.
- the hot strip mill 100 is designed to transport the metallic rolling stock 40, the pre-strip 50, and the hot strip 60 in a transport direction running parallel to a longitudinal extent L of the pre-strip 50.
- Figure 2 shows a perspective view of a pre-strip 50.
- the pre-strip 50 has a longitudinal extent L.
- the pre-strip 50 has a front section 51, which is fed to the finishing mill 30 before a rear section 52 of the pre-strip 50 when the pre-strip 50 is transported in the transport direction of the hot strip mill 100 during the rolling process.
- the pre-strip 50 also has a width B and a height H, wherein the height H can also be referred to as thickness H.
- the longitudinal extension L, the width extension B and the height extension H are each arranged perpendicular to each other and span a Cartesian coordinate system.
- Page 19/32 P80921WO Figure 3 shows a process flow diagram of a process according to a first embodiment of the present invention. The process is carried out by the hot strip mill 100.
- a metallic rolling stock 40 is pre-rolled into a pre-strip 50 by means of the pre-rolling mill 10.
- the pre-strip 50 is cooled by means of the pre-strip cooler 20.
- the cooled pre-strip 50 is finish-rolled into a hot strip 60.
- the control device 80 controls or regulates the pre-strip cooler 20 such that the cooling S2 of the pre-strip 50 by means of the pre-strip cooler 20 takes place such that the pre-strip 50 output from the pre-strip cooler 20 has a temperature distribution along its longitudinal extent L such that the front section 51 of the pre-strip 50 has a lower temperature than the rear section 52 of the pre-strip 50.
- the cooling S2 of the pre-strip 50 by means of the pre-strip cooler 20 can be controlled or regulated by the control device 80 such that the pre-strip 50 output from the pre-strip cooler 20 has a temperature that decreases continuously, preferably strictly monotonically, more preferably linearly from its rear section 52 to its front section 51. Such cooling is optional and not mandatory.
- the cooling S2 of the transfer strip 50 by means of the transfer strip cooler 20 can be controlled or regulated by means of the control device 80 such that the temperature of the front section 51 of the transfer strip 50 has a predetermined minimum temperature upon entry into the finishing mill 30. Such cooling is optional and not mandatory.
- the cooling S2 of the transfer strip 50 by means of the transfer strip cooler 20 can be controlled or regulated by means of the control device 80 such Page 20/32 P80921WO be controlled so that the temperature of each section of the preliminary strip 50 entering the finishing rolling mill 30 has a predetermined minimum temperature.
- Corresponding cooling is optional and not mandatory.
- the cooling S2 of the preliminary strip 50 by means of the preliminary strip cooler 20 can be controlled or regulated by means of the control device 80 such that the preliminary strip cooler 20 discharges a decreasing amount of cooling fluid onto the preliminary strip 50 via the cooling fluid nozzles 21 over a length of the preliminary strip 50.
- Corresponding cooling is optional and not mandatory.
- Figure 4 shows a process flow diagram of a process according to a second embodiment of the present invention. The process is carried out by the hot strip mill 100.
- a metallic rolling stock 40 is pre-rolled into a preliminary strip 50 by means of the pre-rolling mill 10.
- a temperature distribution of the pre-strip 50 output from the roughing mill 10 is determined.
- a target temperature distribution of the pre-strip 50 before entering the finishing mill 30 is calculated.
- a spatially and temporally resolved cooling fluid flow is calculated, which is to be output from the cooling fluid nozzles 21 onto the pre-strip 50 passing through the pre-strip cooler 20, based on the determined temperature distribution of the pre-strip 50 output from the roughing mill 10 such that the pre-strip 50 has the target temperature distribution after passing through the pre-strip cooler 20.
- the pre-strip 50 is cooled accordingly by means of the pre-strip cooler 20.
- the cooled pre-strip 50 is finish-rolled into a hot strip 60.
- the determination S21 of the temperature distribution of the preliminary strip 50 output from the roughing mill 10 can be based on a calculated temperature distribution of the metallic rolling stock 40 before entering the roughing mill 10. A corresponding determination S21 is optional and not mandatory.
- the determination S21 of the temperature distribution of the preliminary strip 50 output from the roughing mill 10 can be based at least partially on at least one measured temperature of the metallic rolling stock 40 before entering the roughing mill 10.
- a temperature detection device (not shown in Figure 1) can be provided, which is designed to determine the temperature of the metallic rolling stock 40 before entering the roughing mill 10.
- a corresponding determination S21 is optional and not mandatory.
- FIG. 5 shows a process flow diagram of a method according to a third embodiment of the present invention. The method is carried out by the hot strip mill 100.
- process step S1 a metallic rolling stock 40 is pre-rolled into a preliminary strip 50 by means of the roughing mill 10.
- process step S21 a temperature distribution of the preliminary strip 50 output from the roughing mill 10 is determined.
- a rolling speed at which the preliminary strip 50 is rolled in the finishing mill 30 is determined.
- a process step S221 the target temperature distribution of the pre- Page 22/32 P80921WO strip 50 before entering the finishing mill 30 based on the rolling speed in the finishing mill 30.
- a spatially and temporally resolved cooling fluid flow is calculated, which is to be output from the cooling fluid nozzles 21 onto the pre-strip 50 passing through the pre-strip cooler 20, based on the determined temperature distribution of the pre-strip 50 output from the roughing mill 10 such that the pre-strip 50 has the target temperature distribution after passing through the pre-strip cooler 20.
- the calculation S23 of the target temperature distribution of the preliminary strip 50 before entering the finishing rolling mill 30 is also based on a predetermined minimum temperature distribution of the hot strip 60 to be output from the finishing rolling mill 30.
- the preliminary strip 50 is cooled accordingly by means of the preliminary strip cooler 20.
- the cooled preliminary strip 50 is finish-rolled into a hot strip 60.
- Figure 6 shows a process flow diagram of a method according to a fourth embodiment of the present invention. The method is carried out by the hot strip mill 100.
- method step S1 a metallic rolling stock 40 is pre-rolled into a preliminary strip 50 by means of the pre-rolling mill 10.
- a temperature distribution of the preliminary strip 50 output from the pre-rolling mill 10 is determined.
- a roughing time is determined within which the metallic rolling stock 40 is rough-rolled in the roughing mill 10 to the roughing strip 50.
- the target temperature distribution of the roughing strip 50 before entering the finishing mill 30 is calculated under the condition that a roughing strip 50 exhibiting the target temperature distribution can be finish-rolled in the finishing mill 30 to hot strip 60 within a finish-rolling time that corresponds to the roughing time.
- a spatially and temporally recorded Page 23/32 P80921WO The cooling fluid flow to be discharged from the cooling fluid nozzles 21 onto the pre-strip 50 passing through the pre-strip cooler 20 is calculated based on the determined temperature distribution of the pre-strip 50 discharged from the roughing mill 10 such that the pre-strip 50 has the target temperature distribution after passing through the pre-strip cooler 20.
- the pre-strip 50 is cooled accordingly by means of the pre-strip cooler 20.
- the cooled pre-strip 50 is finish-rolled into a hot strip 60.
- Figure 7 shows a process flow diagram of a method according to a fifth embodiment of the present invention.
- the method is carried out by the hot strip mill 100.
- a metallic rolling stock 40 is pre-rolled into a pre-strip 50 by means of the roughing mill 10.
- a geometric deviation of a pre-strip 50 output from the roughing mill 10 from a target geometry of the pre-strip 50 is determined.
- the pre-strip 50 is cooled, taking into account the geometric deviation of the pre-strip 50, in such a way that a top side 53 and a bottom side 54 of the pre-strip 50 are exposed to cooling fluid in such a way that targeted mechanical stresses are induced in the pre-strip 50, causing the pre-strip 50 to deform in the direction of the target geometry.
- FIG. 8 shows a process flow diagram of a method according to a sixth embodiment of the present invention. The method is carried out by the hot strip mill 100.
- process step S1 a metallic rolling stock 40 is pre-rolled into a pre-strip 50 by means of the pre-rolling mill 10.
- Page 24/32 P80921WO In a method step S12, a temperature distribution of the pre-strip 50 output from the roughing mill 10 is determined along the width B of the pre-strip 50.
- a subsequent method step S25 based on the determined temperature distribution along the width B, the pre-strip 50 is cooled by the pre-strip cooler 20 such that the pre-strip 50 output from the pre-strip cooler 20 has a temperature distribution along its width B that is symmetrical with respect to a longitudinal axis L of the pre-strip 50.
- the cooled pre-strip 50 is finish-rolled into a hot strip 60.
- Figure 9 shows a process flow diagram of a method according to a seventh embodiment of the present invention. The method is carried out by the hot strip mill 100.
- process step S1 a metallic rolling stock 40 is pre-rolled into a pre-strip 50 by means of the pre-rolling mill 10.
- the width of the pre-strip 50 is determined.
- the cooling fluid nozzles 21 are controlled such that they discharge cooling fluid only onto the pre-strip 50.
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- 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 |
|---|---|---|---|
| DE102023135963.0A DE102023135963A1 (de) | 2023-12-20 | 2023-12-20 | Verfahren zum Betrieb eines Vorbandkühlers in einer Warmbandstraße, Warmbandstraße mit einem zwischen einem Vorwalzwerk und einem Fertigwalzwerk angeordneten Vorbandkühler |
| PCT/EP2024/086591 WO2025132226A1 (de) | 2023-12-20 | 2024-12-16 | VERFAHREN ZUM BETRIEB EINES VORBANDKÜHLERS IN EINER WARMBANDSTRAßE, WARMBANDSTRAßE MIT EINEM ZWISCHEN EINEM VORWALZWERK UND EINEM FERTIGWALZWERK ANGEORDNETEN VORBANDKÜHLER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4608575A1 true EP4608575A1 (de) | 2025-09-03 |
Family
ID=94128877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24829140.3A Pending EP4608575A1 (de) | 2023-12-20 | 2024-12-16 | VERFAHREN ZUM BETRIEB EINES VORBANDKÜHLERS IN EINER WARMBANDSTRAßE, WARMBANDSTRAßE MIT EINEM ZWISCHEN EINEM VORWALZWERK UND EINEM FERTIGWALZWERK ANGEORDNETEN VORBANDKÜHLER |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4608575A1 (de) |
| DE (1) | DE102023135963A1 (de) |
| WO (1) | WO2025132226A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2507641A1 (de) * | 1975-02-21 | 1976-09-02 | Sp K Bjuro Uraltschermetwtomat | Regelverfahren zur temperaturkonstanthaltung beim kuehlen warmgewalzten bandes vor dessen aufspulen und vorrichtung zur durchfuehrung des verfahrens |
| DE4236307A1 (de) * | 1992-10-28 | 1994-05-05 | Schloemann Siemag Ag | Verfahren und Anlage zur Herstellung von warmgewalztem Stahlband, insbesondere aus bandförmig stranggegossenem Vormaterial |
| EP2524971A1 (de) * | 2011-05-20 | 2012-11-21 | Siemens VAI Metals Technologies GmbH | Verfahren und Vorrichtung zum Aufbereiten von Walzgut aus Stahl vor dem Warmwalzen |
| DE102019216261A1 (de) * | 2019-07-02 | 2021-01-07 | Sms Group Gmbh | Verfahren zur Steuerung einer Kühleinrichtung in einer Walzstraße |
-
2023
- 2023-12-20 DE DE102023135963.0A patent/DE102023135963A1/de active Pending
-
2024
- 2024-12-16 WO PCT/EP2024/086591 patent/WO2025132226A1/de active Pending
- 2024-12-16 EP EP24829140.3A patent/EP4608575A1/de active Pending
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| Publication number | Publication date |
|---|---|
| WO2025132226A1 (de) | 2025-06-26 |
| DE102023135963A1 (de) | 2025-06-26 |
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