EP1074317A2 - Verfahren zum flexiblen Walzen eines Metallbandes - Google Patents
Verfahren zum flexiblen Walzen eines Metallbandes Download PDFInfo
- Publication number
- EP1074317A2 EP1074317A2 EP00115953A EP00115953A EP1074317A2 EP 1074317 A2 EP1074317 A2 EP 1074317A2 EP 00115953 A EP00115953 A EP 00115953A EP 00115953 A EP00115953 A EP 00115953A EP 1074317 A2 EP1074317 A2 EP 1074317A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal strip
- roll
- roll gap
- flatness
- work
- 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
Images
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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/24—Automatic variation of thickness according to a predetermined programme
- B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
-
- 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
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
Definitions
- the invention relates to a method for flexible rolling of a metal strip, wherein the metal strip during the rolling process by one between two work rolls formed roll gap and the roll gap targeted during the rolling process is moved to different strip thicknesses over the length of the metal strip to achieve.
- Flexible rolling as a process for the production of flat metal strips with over their length defines different strip thicknesses is already known in practice.
- the flexible rolling is characterized in that during the rolling process Roll gap is moved specifically.
- Roll gap is moved specifically.
- different lengths of tape rolled with different strip thicknesses over different pitches can be connected.
- the goal of flexible rolling is To produce rolled products with cross-sectional shapes optimized for load and weight.
- the process is usually designed as strip rolling from coil to coil.
- the strip tension applied over the reel supports the rolling process and significantly improves the straightness of the finished strip profile in the longitudinal direction, i.e. in Rolling direction.
- Another possibility for correction consists in that one roll bale each Horizontal rotation around the center of its line of contact with the corresponding one The roller is placed at an angle to its axis. Because of this inclination the gap at the ends of the roll bale changes while it is in the middle remains unchanged. The inclination of the rollers allows the possibility of variation an approximate compensation of the deflection for almost all operating cases, but is the aforementioned parabolic grinding in terms of the achievable accuracy the roller bales equate.
- Flatness is an essential requirement for a metal band. It is important to Ensure the same ratio from the center of the strip to the edge of the strip for further processing to be able to. If the tapes are not flat, undesirable effects can occur come while reeling. This manifests itself in friction stress peaks on the contact surfaces in the coiled reel either in the middle of the strip or at the edge of the strip depending on the belt profile. This can depend on the wrap angle and the occurring friction conditions to stick the coiled Lead strip, especially if an annealing treatment after rolling is carried out.
- both the strip thickness and the Flatness is constantly set, monitored via complex control loops and when it occurs Deviations are regulated by appropriate actuators.
- a control device to regulate the roll deflection caused by rolling force in conventional Strip rolling process is known for example from DE 22 64 333 C3.
- the problem is that there is a certain response time in the known control and requires a certain period of time for the regulation to respond and the Effect of a disturbance variable change through the effect of the regulation within the Measuring accuracy is corrected.
- This problem of the response of the scheme and The required control time plays a significant role, especially in flexible rolling Role, because sometimes very short tape sections with different thicknesses with some high rolling speeds have to be rolled, and the flatness ultimately should be guaranteed over the entire length of the flexibly rolled strip. This is extremely difficult, especially for wider metal strips.
- the object of the present invention is to provide a method for flexible rolling a To provide metal strip in which a good flatness can be achieved can, even with relatively wide bands.
- the previously derived and described task is the beginning of a method described type according to the invention essentially solved in that during each time the roll gap is adjusted or immediately afterwards the bending lines of the work rolls depending on the set nip to achieve flatness of the metal strip can be controlled. It is essential in the invention that Influencing the bending lines of the work rolls when setting the roll gap - at least initially - not via regulation, but via a controller, So a process in which one size - in the present case the bending lines of the work rolls - of a different size - in the present case the roll gap - in a predetermined, fixed relationship is influenced.
- the change in the bending line is compensated for due to the load changes in the case of a change in the roll gap by knowing the dependence of the bending line on the respective roll gaps. If, for example, the roll gap is adjusted from S 1 to S 2 for a specific rolling stock, this adjustment of the roll gap leads to a change in the deflection of the work rolls.
- This change in the bending line is known and forms the basis of the controlled compensation. The knowledge of the change in the bending line can follow from the given geometry, but can in particular be obtained empirically, namely by returning corresponding measurement variables during the rolling process.
- the bending line is directly dependent on the respective roll gaps by application, d. H. Increase or decrease certain rebend forces adjusted to obtain a uniform gap dimension over the length of the roll gap.
- the flatness following the control and especially immediately after setting the roll gap via at least one Control loop is regulated.
- the invention therefore provides that first, d. H. when setting of the roll gap, only one control is carried out. External disturbances with exception the changing roll gap cannot be taken into account here. However, if the control intervention is completed, the regulation responds to the in Eliminate tape remaining flatness and thus achieve a flat metal tape.
- predetermined ones are determined depending on the different roll gaps Applied bending forces on the work rolls and / or the support rolls, around a work roll bend or a support and work roll bend to achieve.
- the aforementioned Control or regulation can preferably be carried out with the work and / or Implement backup roll bending because here - the travel speed of the roll gap accordingly - quick changes can be realized, which is especially the case with flexible Rolling with sometimes very short strip sections is important.
- the optical measurement of the flatness can be done directly behind the work rolls realize in a simple way.
- the flatness of the metal strip preferably over the entire width of the metal strip behind the roll gap for each Length increment measured.
- Laser thickness measurement across the entire width of the metal strip enables a simple way to optimize the bending line of the work rolls online.
- the laser thickness measurement via triangulation enables through the small measuring spot and the high measuring frequencies of 1 kHz and more even with short band sections about 50 mm long to determine the cross profile.
- a stressometer roll can be used.
- a roll stand 1 part of a roll stand 1 is on the one hand without counter-bending (Fig. 1) and on the other hand with counter-bending (Fig. 2).
- a cylindrical work roll 2 with roll balls 3 and journals 4, 5, the are stored in bearings 6, 7.
- Back-up roll 8 with a cylindrical back-up roll barrel 9 and bearing journal 10, 11, which are stored in bearings 12, 13.
- the upper rolls of the roll stand 1 Not shown are the two lower corresponding rolls, namely a lower work roll and a lower backup roller. Located between the two work rolls the roll gap S.
- the rolling force F W causes an elastic deflection of the work roll 2, so that the bending line B of the work roll 2 results.
- the rolling force F W leads not only to a deflection of the work roll 2, but also to a deflection of the support roll 8, which is not shown in detail.
- the roll gap S has a constant, uniform gap dimension, that is to say an at least substantially constant constant distance between the two facing surfaces of the work rolls.
- the work roll 2 is not bent.
- the rolling force F W counteracted by the backing roll 8 applied bending forces F B.
- the bending line B runs that of the central axis corresponds to the work roll 2, parallel to the outside of the work roll 2 cambered roll barrel 3, this is not the case. In this case one is over the length of the work roll constant roll gap as opposed to the illustration 2, the work roll bent, although the delimiting the roll gap Line or surface of the work roll runs horizontally.
- the method according to the invention for flexible rolling of a metal strip is running now so that the roll gap S is deliberately moved during the rolling process, to achieve a predetermined change in thickness of the metal strip over its length. It is essential here first that during the setting of the roll gap S or immediately afterwards the bending lines B of the work rolls 2 as a function of the set one Roll gap to be controlled to achieve flatness of the metal strip. This is due to the knowledge of the bending line dependency of the different ones Rolling gaps possible. This is due to the different nips caused deviation from the ideal gap compensated.
- predetermined rebending forces F B are applied to the support rolls 8 in order to achieve a work and support roll bending.
- rebending forces F B are applied to the work rolls 2 to compensate for the flatness.
- a measured value acquisition is first carried out using appropriate measuring means. Both the longitudinal and the transverse profile are measured. The longitudinal profile or cross profile detection is then carried out, the control deviation between the actual value and the target value of the respective control variable being determined. The respective correction values are then fed to a control loop.
- longitudinal profile detection the change ⁇ h in the thickness of the metal strip is corrected to the predetermined target value in accordance with the predetermined target value. A corresponding change ⁇ S of the roll gap is required for this.
- the back bending forces F B to be applied to the respective work rolls 2 depend on the change in the roll gap S.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
- Fig. 1
- eine schematische Darstellung eines Teils eines Walzgerüstes ohne Gegenbiegung,
- Fig. 2
- eine Ansicht des Walzgerüstes aus Fig. 1 mit Gegenbiegung und
- Fig. 3
- die Darstellung eines Regelkreises.
Claims (10)
- Verfahren zum flexiblen Walzen eines Metallbandes, wobei das Metallband während des Walzprozesses durch einen zwischen zwei Arbeitswalzen gebildeten Walzspalt geführt und der Walzspalt während des Walzvorgangs gezielt verfahren wird, um über die Länge des Metallbandes unterschiedliche Banddicken zu erzielen, dadurch gekennzeichnet, daß während jedes Einstellens des Walzspalts oder unmittelbar danach die Biegelinien der Arbeitswalzen in Abhängigkeit vom eingestellten Walzspalt zur Erzielung einer Planheit des Metallbandes gesteuert werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Planheit im Anschluß an die Steuerung und insbesondere unmittelbar nach der Einstellung des Walzspalts über wenigstens einen Regelkreis geregelt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß kurz vor oder während des erneuten Einstellens des Walzspalts die Regelung der Planheit unterbrochen wird und die Biegelinien der Arbeitswalzen in Abhängigkeit der erneuten Walzspaltanstellung für den neuen Walzfall zur Erzielung der Planheit erneut gesteuert werden.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zur Steuerung in Abhängigkeit von den unterschiedlichen Walzspalten vorbestimmte Rückbiegekräfte auf die Arbeits- und/oder Stützwalzen aufgebracht werden, um eine Arbeitswalzenbiegung oder eine Stütz- und Arbeitswalzenbiegung zu erzielen.
- Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß zum Ausregeln einer Unplanheit des Metallbandes dem jeweiligen Belastungsfall angepaßte Rückbiegekräfte auf die Arbeits- und/oder Stützwalzen aufgebracht werden, um eine Arbeitswalzendurchbiegung und/oder Stütz- und Arbeitswalzenbiegung zu erzielen.
- Verfahren nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Messung der Planheit berührungslos, z. B. optisch erfolgt.
- Verfahren nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Planheit des Metallbandes über die gesamte Breite des Metallbandes hinter dem Walzspalt für jedes Längeninkrement gemessen wird.
- Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß zur Messung der Planheit über die gesamte Breite des Metallbandes verteilte Laserdickenmeßstationen vorgesehen sind und daß die Laserdickenmessung über Triangulation erfolgt.
- Verfahren nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Messung der Planheit berührend, z. B. über eine Stressometerrolle erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Banddicke des Metallbandes in Längsrichtung geregelt wird.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19936522 | 1999-08-06 | ||
DE19936522 | 1999-08-06 | ||
DE19939166A DE19939166B4 (de) | 1999-08-20 | 1999-08-20 | Verfahren zum flexiblen Walzen eines Metallbandes |
DE19939166 | 1999-08-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1074317A2 true EP1074317A2 (de) | 2001-02-07 |
EP1074317A3 EP1074317A3 (de) | 2003-01-29 |
EP1074317B1 EP1074317B1 (de) | 2005-02-16 |
Family
ID=26054475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00115953A Expired - Lifetime EP1074317B1 (de) | 1999-08-06 | 2000-07-26 | Verfahren zum flexiblen Walzen eines Metallbandes |
Country Status (5)
Country | Link |
---|---|
US (1) | US6336349B1 (de) |
EP (1) | EP1074317B1 (de) |
JP (1) | JP2001079607A (de) |
AT (1) | ATE289229T1 (de) |
DE (1) | DE50009532D1 (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1388486A2 (de) | 2002-08-09 | 2004-02-11 | Bayerische Motoren Werke Aktiengesellschaft | Fahrzeugkarosserie |
DE10335666A1 (de) * | 2003-08-04 | 2005-04-14 | Bayerische Motoren Werke Ag | Zug-Druckstrebe für eine Fahrzeugkarosserie |
EP1772354A2 (de) | 2002-03-30 | 2007-04-11 | Bayerische Motoren Werke Aktiengesellschaft | Querträger zwischen zwei seitlichen Randbereichen einer Fahrzeugtür |
WO2010086141A1 (de) | 2009-01-30 | 2010-08-05 | Sms Siemag Ag | Vorrichtung und verfahren zum aufhaspeln eines bandes mit veränderlicher banddicke, insbesondere eines metallbandes |
US8522586B2 (en) | 2007-03-22 | 2013-09-03 | Voestalpine Stahl Gmbh | Method for flexibly rolling coated steel strips |
EP2745948A1 (de) * | 2012-12-20 | 2014-06-25 | Siemens VAI Metals Technologies GmbH | Haspeleinrichtung mit rückbiegbarer Haspelwelle |
EP3301197A1 (de) | 2016-09-29 | 2018-04-04 | Outokumpu Oyj | Verfahren zur kaltverformung eines austenitischen stahls |
DE102016123069A1 (de) | 2016-11-30 | 2018-05-30 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren und Vorrichtung zur Herstellung eines Leitersegmentes |
EP3342494A1 (de) | 2016-12-30 | 2018-07-04 | Outokumpu Oyj | Verfahren und vorrichtung zum walzen von metallstreifen |
WO2021084379A1 (en) | 2019-10-30 | 2021-05-06 | Arcelormittal | A press hardening method |
WO2024028640A1 (en) | 2022-08-04 | 2024-02-08 | Arcelormittal | Steel sheet with variable thickness having a reduced risk of delayed fracture after press hardening, a press hardening method, a press hardened coated steel part |
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DE102005057742B3 (de) | 2005-12-02 | 2007-06-14 | Voestalpine Automotive Holding Gmbh | Verfahren und Vorrichtung zum Aufheizen von Stahlbauteilen |
DE102009050997B4 (de) | 2009-10-28 | 2017-07-13 | Volkswagen Ag | Verfahren und Umformvorrichtung zur Herstellung eines formgehärteten Bauteils |
DE102014210008A1 (de) * | 2014-05-26 | 2015-11-26 | Muhr Und Bender Kg | Verfahren und Anlage zum Herstellen eines gehärteten Formteils |
SI3097992T1 (sl) | 2015-05-29 | 2017-10-30 | Giebel Kaltwalzwerk Gmbh | Postopek za stopenjsko valjanje kovinskega traku |
WO2017203311A1 (en) * | 2016-05-24 | 2017-11-30 | Arcelormittal | Cold rolled and annealed steel sheet, method of production thereof and use of such steel to produce vehicle parts |
WO2017203315A1 (en) | 2016-05-24 | 2017-11-30 | Arcelormittal | Cold rolled and annealed steel sheet, method of production thereof and use of such steel to produce vehicle parts |
WO2017203312A1 (en) * | 2016-05-24 | 2017-11-30 | Arcelormittal | Cold rolled and annealed steel sheet, method of production thereof and use of such steel to produce vehicle parts |
PL3470145T3 (pl) * | 2017-10-10 | 2022-06-20 | Outokumpu Oyj | Sposób częściowego odkształcania stali na zimno o jednorodnej grubości |
EP3566790B1 (de) | 2018-05-08 | 2021-01-06 | Muhr und Bender KG | Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern |
KR102213747B1 (ko) * | 2019-04-18 | 2021-02-08 | 안동대학교 산학협력단 | 선재 압연롤러의 간격 조절장치 |
KR102213746B1 (ko) * | 2019-04-18 | 2021-02-08 | 안동대학교 산학협력단 | 스크레이퍼 및 간격조절장치가 구비된 선재압연롤러 |
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US4116029A (en) * | 1976-07-24 | 1978-09-26 | Hoesch Werke Ag | Device for measuring the flatness of metal strips |
JPS61172603A (ja) * | 1985-01-29 | 1986-08-04 | Sumitomo Metal Ind Ltd | 厚板圧延法 |
JPH03184612A (ja) * | 1989-12-12 | 1991-08-12 | Sumitomo Metal Ind Ltd | 板圧延における平坦度制御方法 |
FR2695049A1 (fr) * | 1992-09-03 | 1994-03-04 | Lorraine Laminage | Procédé et dispositif d'évaluation de la planéité d'une bande et ligne de fabrication d'une bande en continu comportant un dispositif d'évaluation de la planéité de la bande. |
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JPS5677011A (en) | 1979-11-28 | 1981-06-25 | Hitachi Ltd | Method and apparatus for shape control |
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2000
- 2000-07-26 EP EP00115953A patent/EP1074317B1/de not_active Expired - Lifetime
- 2000-07-26 DE DE50009532T patent/DE50009532D1/de not_active Expired - Lifetime
- 2000-07-26 AT AT00115953T patent/ATE289229T1/de active
- 2000-08-07 US US09/634,717 patent/US6336349B1/en not_active Expired - Lifetime
- 2000-08-07 JP JP2000238638A patent/JP2001079607A/ja active Pending
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EP1772354A2 (de) | 2002-03-30 | 2007-04-11 | Bayerische Motoren Werke Aktiengesellschaft | Querträger zwischen zwei seitlichen Randbereichen einer Fahrzeugtür |
EP1388486A2 (de) | 2002-08-09 | 2004-02-11 | Bayerische Motoren Werke Aktiengesellschaft | Fahrzeugkarosserie |
DE10335666A1 (de) * | 2003-08-04 | 2005-04-14 | Bayerische Motoren Werke Ag | Zug-Druckstrebe für eine Fahrzeugkarosserie |
US8522586B2 (en) | 2007-03-22 | 2013-09-03 | Voestalpine Stahl Gmbh | Method for flexibly rolling coated steel strips |
WO2010086141A1 (de) | 2009-01-30 | 2010-08-05 | Sms Siemag Ag | Vorrichtung und verfahren zum aufhaspeln eines bandes mit veränderlicher banddicke, insbesondere eines metallbandes |
DE102009057180A1 (de) | 2009-01-30 | 2010-08-19 | Sms Siemag Ag | Vorrichtung und Verfahren zum Aufhaspeln eines Bandes, insbesondere Metallbandes |
EP2745948A1 (de) * | 2012-12-20 | 2014-06-25 | Siemens VAI Metals Technologies GmbH | Haspeleinrichtung mit rückbiegbarer Haspelwelle |
EP3301197A1 (de) | 2016-09-29 | 2018-04-04 | Outokumpu Oyj | Verfahren zur kaltverformung eines austenitischen stahls |
WO2018060454A1 (en) | 2016-09-29 | 2018-04-05 | Outokumpu Oyj | Method for cold deformation of an austenitic steel |
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EP3342494A1 (de) | 2016-12-30 | 2018-07-04 | Outokumpu Oyj | Verfahren und vorrichtung zum walzen von metallstreifen |
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TWI746756B (zh) * | 2016-12-30 | 2021-11-21 | 芬蘭商奧托昆布公司 | 用於軋延金屬條之方法與裝置 |
RU2764727C2 (ru) * | 2016-12-30 | 2022-01-19 | Оутокумпу Оюй | Способ и устройство для прокатки металлических полос |
WO2018122020A1 (en) | 2016-12-30 | 2018-07-05 | Outokumpu Oyj | Method and device for rolling metal strips |
AU2017387446B2 (en) * | 2016-12-30 | 2023-12-14 | Outokumpu Oyj | Method and device for rolling metal strips |
US11865598B2 (en) | 2016-12-30 | 2024-01-09 | Outokumpu Oyj | Method for manufacturing flexible rolling of metal strips |
WO2021084379A1 (en) | 2019-10-30 | 2021-05-06 | Arcelormittal | A press hardening method |
WO2024028640A1 (en) | 2022-08-04 | 2024-02-08 | Arcelormittal | Steel sheet with variable thickness having a reduced risk of delayed fracture after press hardening, a press hardening method, a press hardened coated steel part |
WO2024028763A1 (en) | 2022-08-04 | 2024-02-08 | Arcelormittal | Steel sheet with variable thickness having a reduced risk of delayed fracture after press hardening and method for manufacturing the same |
Also Published As
Publication number | Publication date |
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ATE289229T1 (de) | 2005-03-15 |
DE50009532D1 (de) | 2005-03-24 |
US6336349B1 (en) | 2002-01-08 |
EP1074317B1 (de) | 2005-02-16 |
EP1074317A3 (de) | 2003-01-29 |
JP2001079607A (ja) | 2001-03-27 |
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