EP4469220A1 - Verfahren zum querteilen eines metallbandes sowie walzanlage mit einer schere zum querteilen eines metallbandes - Google Patents
Verfahren zum querteilen eines metallbandes sowie walzanlage mit einer schere zum querteilen eines metallbandesInfo
- Publication number
- EP4469220A1 EP4469220A1 EP23700781.0A EP23700781A EP4469220A1 EP 4469220 A1 EP4469220 A1 EP 4469220A1 EP 23700781 A EP23700781 A EP 23700781A EP 4469220 A1 EP4469220 A1 EP 4469220A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal strip
- cutting
- shear strength
- rolling
- length
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/06—Width
-
- 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
-
- 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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
Definitions
- the invention relates to a method for transversely dividing a metal strip using at least one pair of shears in a rolling mill.
- the invention also relates to a rolling plant comprising means for cutting to length and rolling a metal strip in at least one rolling line with at least one rolling device, at least one shear designed to cut the metal strip into sections of a predetermined length, and at least one higher-level process control for automating the plant.
- the rolling plant is designed in particular as a so-called CSP® plant (Compact Strip Production) for the quasi-continuous casting and rolling of slabs.
- the CSP® process developed by the applicant is a process in which liquid steel is cast into so-called slabs in a continuous casting machine.
- the cast strand is cut into slabs with shears and homogenized in a furnace to rolling temperature and, if necessary, heated, and then rolled in a hot rolling mill.
- the shears, which cut individual slabs from the strand continuously emerging from the machine are designed in such a way that the warm strand can also be cut under demanding process conditions, i.e. at a low temperature level, when processing high-strength material and with large cutting widths.
- the scissors can be subject to increased wear. Under the most unfavorable conditions, the scissors can be damaged, leading to failure.
- a method for transversely dividing a metal strip is also known, for example, from EP 3 177 412 B1.
- the method also relates to the setting of a specific temperature profile at the strip head and strip foot before a metal strip is cut to length.
- the invention is based on the object of providing a method for transversely dividing a metal strip of the type mentioned at the outset, which also contributes to improving the wear behavior of the shears.
- the invention is also based on the object of providing a rolling installation which is designed in such a way that low-wear operation of the shears is ensured.
- One aspect of the invention relates to a method of transversely dividing a Metal strip by means of at least one pair of shears in a rolling mill, comprising the following process steps:
- the scissors used in the method can be designed as pendulum scissors, crank scissors, drum scissors or the like.
- a metal strip in the context of the invention is understood to mean a flat metal product which is fed continuously or discontinuously to a rolling mill as a semi-finished product in the form of slabs, blocks, billets and which is to be cut before and/or during processing in a rolling mill.
- the term "metal strip” also includes intermediate products and preliminary products, such as hot strip or cast strands, which emerge from the outlet of a continuous casting machine connected to the rolling plant and are cut into slabs in the rolling plant and then rolled into strip.
- the process relates in particular to the cross-cutting of metal strips with a temperature of more than 300 degrees C.
- the rolling mill according to the present invention is preferably one for producing strip having a final thickness of 0.6 to 25.4 mm from cast slabs having, for example, a thickness of 40 to 180 mm, preferably 50 to 150 mm and a width of 800 to 2500 mm can have.
- An essential aspect of the invention is the machine protection of the shears through a preferably continuous calculation of the hot shear strength of the metal strip at the cutting point. If the shear strength of the metal strip is greater than a defined shear strength limit at the cutting point at a set point in time, the cut of the scissors is blocked according to the invention, preferably until the shear strength of the metal strip is less than or equal to a shear strength limit given for the scissors is.
- the method can be carried out based on models and rules.
- the temperature profile before the metal strip is cut to length is not influenced, but the shear strength of the metal strip is calculated continuously, with the shear strength being a function of the temperature, the material composition of the metal strip, its thickness and its width.
- a new target cutting time is defined if the cut is blocked because the shear strength limit of the metal strip has been exceeded.
- the shear strength of the metal strip at the cutting location at the desired cutting time can be determined as a function of a temperature of the metal strip at the cutting location at the desired cutting time.
- the temperature at the cutting location at the desired cutting time is continuously determined on the basis of a measured temperature and/or a calculated temperature curve over at least a partial length of the metal strip.
- the target cutting time can be implemented by means of at least one computer Algorithm for cutting length optimization are calculated, which is part of a higher-level process control, for example.
- the shear strength of the metal strip at the desired cutting time at the cutting location is preferably determined as a function of the temperature of the metal strip and its thickness and/or its width and as a function of the material composition of the metal strip.
- An online process model can calculate the temperature profile of the metal strip. In a CSP® plant, for example, the online process model can calculate the temperature curve from a casting machine to the inlet into a downstream furnace or a downstream heating device.
- the material composition can be taken from the analysis of the rolling stock and stored in the process control or process automation.
- Shear strength is to be understood as meaning the shear strength of the metal strip in kN/mm 2 , in particular at elevated temperature, shear strength being understood as meaning the resistance which a solid body opposes, in particular, tangential shear forces.
- the automation for the critical areas of the rolling process or any other upstream process step can lock the shears so that they are not damaged. These critical areas can also be made visible in a level 1 or level 2 automation and the operator can issue appropriate warnings.
- the originally planned target cut can be repositioned in such a way that the process is disrupted as little as possible.
- a rolling plant which comprises means for cutting to length and rolling a metal strip in at least one rolling line with at least one rolling device, with at least one shear preferably being arranged directly behind a continuous casting plant, the shears for separating the metal strip into sections predetermined length is formed, wherein the rolling mill comprises a higher-level process control for automation, wherein the process control comprises means for controlling the at least one pair of shears according to the method described above.
- the shears can be arranged directly behind a continuous casting plant and in front of one of the at least one upstream rolling device furnace.
- the oven can be designed as a tunnel oven, for example.
- the rolling installation according to the invention can in particular have a process controller which has means for calculating a temperature profile and/or a temperature profile of the metal strip between the continuous casting installation and a heating device which is upstream of a first rolling device.
- the process control can include means for at least approximately determining the shear strength of the metal strip as a function of the temperature, the thickness and/or the width of the metal strip and/or its material composition at an inlet of the metal strip in a cutting area of the scissors, as well as means for blocking the scissors if a shear-specific limit shear strength of the metal strip is exceeded.
- the process control preferably includes a device for optimizing the cutting length of the metal strip, which is designed to determine a changed target cutting time for the scissors if cutting initiation is blocked.
- the cut length optimization is preferably model-based.
- the model can be based on machine learning methods, in particular on artificial neural networks and the like.
- Figure 1 shows a casting and rolling plant according to the invention
- Figure 2 shows a hot rolling mill according to the invention.
- FIG. 1 a part of a rolling plant according to the invention, which is designed as a casting and rolling plant 1, is shown schematically.
- the casting and rolling plant 1 comprises a continuous casting plant 2, shears arranged behind the continuous casting plant 2 in the form of pendulum shears 3, a heating device arranged behind the pendulum shears 3 in the form of a tunnel furnace 4 and rolling stands (not shown) which are arranged in at least one rolling train.
- the continuous casting plant 2 comprises a casting ladle, not shown, and a mold 5.
- the cast strand 6 emerging from the mold 5 is deflected via a strand guide 7 and cut to length into slabs behind the strand guide 7 with the pendulum shears 3 in front of the tunnel furnace 4, with the slabs or the Casting strand 6 before the pendulum shears 3 can have a thickness of 40-180 mm and a width of 800-2500 mm.
- the average temperature of the cast strand 6 at the inlet to the pendulum shears 3 should be around 1000° C., i. H. around 900 °C on the outside and around 1200 °C in the core.
- the cast strand 6 is preferably fed to the pendulum shears 3 at a speed of 2-7 m/s.
- the pendulum shears 3 are controlled by a control and regulating device 8, which triggers a cut at a set cutting time depending on a set length of the slabs.
- the method according to the invention comprises a continuous calculation of the shear strength of the cast strand 6 or the metal strip to be separated as a function of the temperature of the cast strand, the material composition of the cast strand and the thickness and width of the cast strand.
- the shearing strength or hot shearing strength of the cast strand 6 is decisive for which shearing or cutting force the pendulum shears 3 parallel to the cutting surface have to raise.
- the pendulum shears 3 are designed for a specific shearing or cutting force, so it can be assumed that if a limit shear strength of the cast strand 6 is exceeded, the pendulum shears 3 will be damaged or subject to increased wear.
- the method according to the invention provides for the shear strength of the cast strand 6 to be calculated continuously on the basis of a temperature profile of the cast strand 6 up to the point at which it enters the tunnel furnace 4 .
- the method includes determining a target cutting time for the pendulum shears 3 as a function of a predetermined target length of the cast strand 6 .
- the control and regulating device 8 receives a control pulse from the monitoring of the hot shear strength of the cast strand 6, which is derived from a comparison of the shear strength of the cast strand 6 with the specified limit shear strength.
- the process controller 9 causes the open-loop and closed-loop control device 8 to place a new slab cut.
- FIG. 2 part of a hot rolling mill 10 according to a second exemplary embodiment of the invention is shown schematically.
- This hot rolling plant 10 does not necessarily have to be preceded by a continuous casting plant 2 .
- Identical components are provided with the same reference symbols in this exemplary embodiment.
- the hot rolling mill 10, to which a hot strip 12 is fed continuously or discontinuously comprises several heating devices, namely an induction heating device 13 and two tunnel furnaces 4, two rolling mills with roll stands 12, and several shears 14, which are designed for different strip thicknesses.
- further known components are not shown or listed. More or fewer shears can be arranged in the rolling mill, and the position in the mill can also be changed vary.
- the hot strip 12 is fed to one of the drum shears 14 .
- the drum shears 14 are each controlled by a control and regulating device 8, which triggers a cut at a desired cutting time depending on a desired length of the strip.
- the method according to the invention includes a continuous calculation of the shear strength of the hot strip 12 or the cast strand 6 to be separated (see Figure 1) as a function of the temperature of the material, the material composition, and the thickness and width of the hot strip 12 or the cast strand 6.
- the shearing strength or hot shearing strength of the metal strip is decisive for the shearing or cutting force that the respective scissors must apply parallel to the cut surface.
- the scissors are each designed for a specific shearing or cutting force, so it can be assumed that when a limit shear strength of the hot strip 12 is exceeded, the relevant scissors will be damaged or subject to increased wear.
- the method according to the invention provides for the shear strength of the hot strip 12 to be calculated continuously on the basis of a temperature profile of the hot strip 12 . This can be limited to a partial area of the hot rolling mill 10 or can cover the entire hot rolling mill 10 .
- the method includes determining a target cutting time for the respective shears as a function of a predetermined target length of the hot strip 12.
- the target length of the hot strip 12 to be cut is specified by a process controller 9.
- the control and regulating device 8 receives a control pulse from the monitoring of the hot shear strength of the hot strip 12, which is derived from a comparison of the shear strength of the hot strip 12 with the specified limit shear strength.
- the process controller 9 causes the control and regulation device 8 to place a new cut.
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 |
|---|---|---|---|
| DE102022200939.8A DE102022200939A1 (de) | 2022-01-28 | 2022-01-28 | Verfahren zum Querteilen eines Metallbandes sowie Walzanlage mit einer Schere zum Querteilen eines Metallbandes |
| PCT/EP2023/050620 WO2023143924A1 (de) | 2022-01-28 | 2023-01-12 | Verfahren zum querteilen eines metallbandes sowie walzanlage mit einer schere zum querteilen eines metallbandes |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4469220A1 true EP4469220A1 (de) | 2024-12-04 |
| EP4469220B1 EP4469220B1 (de) | 2025-12-31 |
| EP4469220C0 EP4469220C0 (de) | 2025-12-31 |
Family
ID=84982478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23700781.0A Active EP4469220B1 (de) | 2022-01-28 | 2023-01-12 | Verfahren zum querteilen eines metallbandes sowie walzanlage mit einer schere zum querteilen eines metallbandes |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4469220B1 (de) |
| JP (1) | JP7772957B2 (de) |
| DE (1) | DE102022200939A1 (de) |
| WO (1) | WO2023143924A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2982453A1 (de) | 2014-08-06 | 2016-02-10 | Primetals Technologies Austria GmbH | Einstellen eines gezielten Temperaturprofiles an Bandkopf und Bandfuß vor dem Querteilen eines Metallbands |
| JP6330734B2 (ja) * | 2015-06-09 | 2018-05-30 | Jfeスチール株式会社 | 鋼板切断位置設定装置及び鋼板製造方法 |
| DE102016109489A1 (de) | 2016-05-24 | 2017-11-30 | Sms Group Gmbh | Verfahren zur Verbesserung des Verschleißverhaltens von Anlagenkomponenten bei der Weiterverarbeitung von hochlegierten Stählen sowie Anlage zur Verarbeitung dieser hochlegierten Stähle |
| DE102019217839A1 (de) * | 2019-11-19 | 2021-05-20 | Sms Group Gmbh | Verfahren zum Betreiben einer Anlage der Hüttenindustrie |
-
2022
- 2022-01-28 DE DE102022200939.8A patent/DE102022200939A1/de active Pending
-
2023
- 2023-01-12 WO PCT/EP2023/050620 patent/WO2023143924A1/de not_active Ceased
- 2023-01-12 JP JP2024543558A patent/JP7772957B2/ja active Active
- 2023-01-12 EP EP23700781.0A patent/EP4469220B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7772957B2 (ja) | 2025-11-18 |
| WO2023143924A1 (de) | 2023-08-03 |
| EP4469220B1 (de) | 2025-12-31 |
| JP2025503930A (ja) | 2025-02-06 |
| EP4469220C0 (de) | 2025-12-31 |
| DE102022200939A1 (de) | 2023-08-03 |
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