EP1893361A1 - Verfahren und vorrichtung zur herstellung eines bandes mit variabler dicke - Google Patents
Verfahren und vorrichtung zur herstellung eines bandes mit variabler dickeInfo
- Publication number
- EP1893361A1 EP1893361A1 EP06753573A EP06753573A EP1893361A1 EP 1893361 A1 EP1893361 A1 EP 1893361A1 EP 06753573 A EP06753573 A EP 06753573A EP 06753573 A EP06753573 A EP 06753573A EP 1893361 A1 EP1893361 A1 EP 1893361A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- speed
- tension
- mill
- stand
- 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.)
- Withdrawn
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
- B21B37/46—Roll speed or drive motor control
-
- 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
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
-
- 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
- B21B2275/04—Roll speed
-
- 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
-
- 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
- B21B37/48—Tension control; Compression control
- B21B37/50—Tension control; Compression control by looper control
Definitions
- the invention relates to a method for producing strip having a variable thickness in its length direction, in particular a repetitive thickness variation, using a stand of a rolling mill, wherein the strip has a thickness Dl when entering the mill stand and a thickness D2 when leaving the mill stand.
- the invention also relates to an apparatus for producing such strip material.
- the rolling speed of the rolls of the stand of the rolling mill is the reference speed for the rolling, which stand speed is controlled by a speed controller.
- the speed of the other mill equipment, such as the coiler and decoiler is controlled using the stand speed as input.
- tension controllers measuring the tension in the strip change the reference rotational speed of the coiler and decoiler relative to the stand speed. The speed of the strip entering the mill and the speed of the strip leaving the mill will change accordingly.
- the thickness of the strip has to be changed fast and the change in the thickness D2 of the strip leaving the mill stand can be up to 50%. Due to the change in thickness the speed of the strip leaving the mill stand changes according to mass flow preservation. As a second effect, due to the change in thickness of the strip the motor speed of the mill stand will change temporarily due to a change in the required rolling torque. This change in mill speed affects the speed of both the strip entering and the speed of the strip leaving the mill stand. For instance when the thickness of the strip leaving the mill stand is reduced this change is felt, since at that moment in time more energy is required for rolling the strip.
- at least one of these objects is reached by executing a method for producing strip having a variable thickness in its length direction, in particular a repetitive thickness variation, using a stand of a rolling mill, wherein the strip has a thickness Dl when entering the mill stand and a thickness D2 when leaving the mill stand, wherein the speed of the strip when leaving the mill stand is used as an input to control the speed of the rolls in the mill stand.
- This method uses a control mechanism using the speed of the strip leaving the mill stand to control the speed of the rolls in the mill stand, which makes it more easy to control the rolling mill.
- the change in speed of the strip leaving the mill stand when the thickness of the strip leaving the mill is changed is now used to control the change in speed of the rolls in the mill stand.
- the speed changes upstream of the strip leaving the rolling mill are thus more naturally a result of the change in speed due to the change in thickness of the strip.
- the strip between the mill stand and equipment downstream of the strip is kept at a certain tension, the tension of the strip being used as an input for controlling the speed of the mill stand and/or the speed of the downstream equipment.
- Both the speed and the tension in the strip leaving the mill stand can now be used to control the speed of the rolls in the mill stand, the speed of the strip controlling the general speed of the rolls in the mill stand, and the tension in the strip being used to fine-tune the speed of the rolls in the mill stand.
- the tension in the strip can also be used to control the speed of downstream equipment such as a coiler.
- the speed of the strip leaving the mill stand is kept approximately constant.
- the constant speed of the strip leaving the roll stand also provides a natural change in the speed of the rolls in the roll stand when the thickness D2 of the strip is changed; for instance, when the thickness D2 of the strip leaving the roll stand is reduced and the speed of this strip is kept constant, the speed of the strip entering the mill stand must be reduced. This means that the rolling speed of the rolls in the mill stand must be reduced, which is in line with the higher rolling torque required for rolling the strip to the reduced thickness D2.
- the strip leaving the mill stand is given a repetitive thickness variation having a repeating profile length of at most 4 meter. From such a strip it is possible to cut profiled lengths from which tailor rolled blanks (TRBs) can be produced.
- TRBs tailor rolled blanks
- a program is provided for determining the thickness D2 in the strip, the program controlling the gap of the mill stand.
- This program thus is the input for producing the strip having a variable thickness, and the resulting strip leaving the mill stand provides the speed of the strip with which the speed of the rolls in the mill stand is controlled.
- Another program is provided for controlling the speed of the strip when entering the mill stand.
- This program can change the speed of the strip entering the mill stand when the gap of the mill stand is changed.
- the speed of the upstream equipment is changed to change the speed of the strip entering the mill stand.
- a decoiler is used to supply the strip to the rolling mill and a coiler is used to take up the rolled strip, wherein a first tension measuring device is present to measure the tension in the strip entering the rolling mill and a second tension measuring device is present to measure the tension in the strip leaving the rolling mill, wherein a speed measuring device is present to control the speed of the strip leaving the rolling mill, wherein the speed and tension measured with the speed measuring device and the second tension measuring device are used as input to control the rolling speed of the rolling mill.
- control uses the speed and tension of the strip leaving the rolling mill, and the measuring devices for measuring this speed and tension are state of the art.
- the speed and tension measured with the speed measuring device, the first tension measuring device and the second tension measuring device are used as input to control the tension in the strip entering the rolling mill using a dancer or equivalent equipment between the decoiler and the rolling mill.
- the same measurements together with the measurement of the tension using the first tension measuring device can be used to control the entrance speed of the strip in the rolling mill.
- the speed and tension measured with the speed measuring device, the first tension measuring device and the second tension measuring device are used as input to control the decoiling speed of the decoiler. All the important equipment upstream of the produced strip is thus controlled using these measurements.
- the rolling mill used is a single stand rolling mill.
- a single stand rolling mill makes the control of the rolling mill easier, since a mill having two or more stands requires a very accurate control of the stands in relation to each other, or requires the use of loopers between the stands.
- an apparatus for producing strip having a variable thickness in its length direction comprising a stand of a rolling mill, upstream equipment, downstream equipment, a tension measuring device for measuring the tension in the strip leaving the mill stand and/or a speed measuring device for controlling the speed of the strip leaving the mill stand, wherein a dancer or looper or equivalent equipment has been placed between the upstream equipment and the mill stand to accommodate changes in strip length, and wherein no dancer or looper or equivalent equipment has been placed between the mill stand and the downstream equipment.
- the apparatus it is possible to produce strip having a variable thickness in a well controlled way according to the first aspect of the invention.
- the apparatus is more simple than the known apparatus for producing strip having a variable thickness, because only one dancer or looper needs to be used.
- a further tension measuring device has been provided for measuring the tension in the strip entering the mill stand.
- the further tension measuring device can be used to control the dancer or looper or equivalent equipment between the upstream equipment and the mill stand and the upstream equipment, such as a decoiler.
- the invention will be elucidated hereinafter.
- this change will thus last at least 0.025 seconds. Should this change in thickness be performed over a strip length of 25 mm, the maximum rolling speed of the rolling mill thus has to be 1 m/s. For this example, we neglect slip.
- the coiling speed is kept constant and the driving system of the rolling stand is decelerated, so as to keep the speed difference in the coiler to a minimum.
- the driving system of the rolling mill is usually heavier than the drive of a coiler, and the inertia of such a driving system can be approximately 600 kgm 2 .
- the required deceleration is the same as the acceleration of the coiler. When a work roll diameter of 300 mm is used, the deceleration needs 8000 Nm less torque. On the other hand, for the increased reduction in the strip leaving the rolling mill extra torque is needed. These changes in torque will balance each other more or less, resulting in an approximately even torque needed for the driving system of the rolling mill when producing strip having a variable thickness in length direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06753573A EP1893361A1 (de) | 2005-05-11 | 2006-05-11 | Verfahren und vorrichtung zur herstellung eines bandes mit variabler dicke |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05076114 | 2005-05-11 | ||
EP06753573A EP1893361A1 (de) | 2005-05-11 | 2006-05-11 | Verfahren und vorrichtung zur herstellung eines bandes mit variabler dicke |
PCT/EP2006/004453 WO2006119998A1 (en) | 2005-05-11 | 2006-05-11 | Method and apparatus for producing strip having a variable thickness |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1893361A1 true EP1893361A1 (de) | 2008-03-05 |
Family
ID=35063079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06753573A Withdrawn EP1893361A1 (de) | 2005-05-11 | 2006-05-11 | Verfahren und vorrichtung zur herstellung eines bandes mit variabler dicke |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080223100A1 (de) |
EP (1) | EP1893361A1 (de) |
WO (1) | WO2006119998A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007049062B3 (de) * | 2007-10-12 | 2009-03-12 | Siemens Ag | Betriebsverfahren zum Einbringen eines Walzguts in ein Walzgerüst eines Walzwerks, Steuereinrichtung und Walzwerk zum Walzen eines bandförmigen Walzgutes |
US8893537B2 (en) * | 2007-11-07 | 2014-11-25 | The Bradbury Company, Inc. | Methods and apparatus to drive material conditioning machines |
EP2257394B1 (de) * | 2008-01-30 | 2018-11-07 | Tata Steel IJmuiden BV | Verfahren zur herstellung eines heissgewalzten twip-stahls und dadurch gewonnenes heissgewalztes twip-stahlprodukt |
EP2624978B1 (de) | 2010-10-06 | 2015-04-01 | The Bradbury Company, Inc. | Vorrichtung und verfahren zur erhöhung der effizienz von walzenformungs- und nivelliersystemen |
CN104338748B (zh) * | 2013-07-24 | 2016-04-27 | 宝山钢铁股份有限公司 | 一种用于变厚度带材轧制的两道次轧制方法 |
CN104338752B (zh) * | 2013-07-24 | 2016-08-10 | 宝山钢铁股份有限公司 | 一种变厚度轧制时的长度控制方法 |
CN104084448B (zh) * | 2014-06-16 | 2016-03-16 | 中国重型机械研究院股份公司 | 一种用于重卷剖分机组双卷取机的同步控制*** |
CN104690094B (zh) * | 2015-03-20 | 2017-03-08 | 北京汽车股份有限公司 | 一种连续变厚度板的成型方法 |
US10618107B2 (en) | 2016-04-14 | 2020-04-14 | GM Global Technology Operations LLC | Variable thickness continuous casting for tailor rolling |
CN106391729B (zh) * | 2016-11-04 | 2018-03-13 | 东北大学 | 一种采用plp带材定长传送的测量装置进行的测量方法 |
CN106623440B (zh) * | 2016-12-05 | 2019-02-22 | 一重集团大连设计研究院有限公司 | 一种变断面冷轧板轧制方法及装置 |
DE102019215265A1 (de) * | 2018-12-06 | 2020-06-10 | Sms Group Gmbh | Verfahren zum Betreiben eines Walzgerüstes zum Stufenwalzen |
IT202000000316A1 (it) | 2020-01-10 | 2021-07-10 | Danieli Off Mecc | Metodo ed apparato di produzione di prodotti metallici piani |
CN112605124B (zh) * | 2020-11-27 | 2022-07-05 | 苏州吉润汽车零部件有限公司 | 一种连续变截面薄钢板的轧制设备及成型方法 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3688532A (en) * | 1970-11-24 | 1972-09-05 | Antonio Vicente Silva | Control system for tandem rolling mill based on the constant volume principle |
BE788725A (fr) * | 1971-09-14 | 1973-03-12 | Westinghouse Electric Corp | Systeme de regulation hydraulique de la tension entre les cageset de reglage automatique de l'epaisseur pour laminoirs multi-cages |
US3852983A (en) * | 1973-04-25 | 1974-12-10 | Westinghouse Electric Corp | Work strip gauge change during rolling in a tandem rolling mill |
US4248072A (en) * | 1978-07-25 | 1981-02-03 | Aichi Steel Works, Limited | Method of and apparatus for producing plate material having uniform width and lengthwise thickness variation |
CH637047A5 (de) * | 1978-12-29 | 1983-07-15 | Lauener W F Ag | Verfahren zur geschwindigkeitssteuerung einer bandgiess- und walzanlage und gemaess diesem verfahren gesteuerte anlage. |
JPS56114519A (en) * | 1980-02-16 | 1981-09-09 | Nippon Steel Corp | Looper controller for continuous rolling mill |
JPS59169614A (ja) * | 1983-03-15 | 1984-09-25 | Ishikawajima Harima Heavy Ind Co Ltd | 先進率制御装置 |
JPS6227271A (ja) * | 1985-07-25 | 1987-02-05 | Mitsubishi Electric Corp | 連続処理設備の速度制御装置 |
US4656856A (en) * | 1985-10-23 | 1987-04-14 | Bethlehem Steel Corporation | Method and apparatus for eliminating crescent formation in a reduction mill |
US4907433A (en) * | 1988-04-18 | 1990-03-13 | Bethlehem Steel Corporation | Apparatus and method for adaptive control of a rolling mill |
US5103662A (en) * | 1990-05-01 | 1992-04-14 | Allegheny Ludlum Corporation | Tandem rolling mill tension control with speed ratio error discrimination |
JPH07251207A (ja) * | 1994-03-16 | 1995-10-03 | Mitsubishi Heavy Ind Ltd | 圧延機 |
US5787746A (en) * | 1994-07-25 | 1998-08-04 | Alcan Aluminum Corporation | Multi-stand hot rolling mill tension and strip temperature multivariable controller |
JPH08150408A (ja) * | 1994-11-25 | 1996-06-11 | Toshiba Corp | ルーパ制御装置 |
WO1999024183A1 (de) * | 1997-11-07 | 1999-05-20 | Siemens Aktiengesellschaft | Verfahren und einrichtung zum walzen eines walzbandes mit variierender dicke |
AU1315699A (en) | 1997-11-12 | 1999-05-31 | Life Technologies, Inc. | Device and methods for purifying biological molecules using low volumes of chromatographic and adsorptive media |
JP2001137921A (ja) * | 1999-11-12 | 2001-05-22 | Kobe Steel Ltd | 圧延機の板厚制御装置 |
US6263714B1 (en) * | 1999-12-27 | 2001-07-24 | Telepro, Inc. | Periodic gauge deviation compensation system |
GB0114849D0 (en) | 2001-06-18 | 2001-08-08 | Pig Improvement Co Uk Ltd | System |
DE10133756A1 (de) * | 2001-07-11 | 2003-01-30 | Sms Demag Ag | Kaltwalzwerk sowie Verfahren zum Kaltwalzen von metallischem Band |
DE10310399B4 (de) * | 2003-03-07 | 2005-03-03 | Sundwig Gmbh | Vorrichtung und Verfahren zum Walzen von Metallbändern |
DE10315357B4 (de) * | 2003-04-03 | 2005-05-25 | Muhr Und Bender Kg | Verfahren zum Walzen und Walzanlage zum Walzen von Metallband |
-
2006
- 2006-05-11 WO PCT/EP2006/004453 patent/WO2006119998A1/en active Application Filing
- 2006-05-11 EP EP06753573A patent/EP1893361A1/de not_active Withdrawn
- 2006-05-11 US US11/913,839 patent/US20080223100A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2006119998A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080223100A1 (en) | 2008-09-18 |
WO2006119998A1 (en) | 2006-11-16 |
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Legal Events
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17Q | First examination report despatched |
Effective date: 20090331 |
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Owner name: TATA STEEL IJMUIDEN BV |
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Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 20120403 |