EP0936002B1 - Rolling method for a strip, in particular a metal strip - Google Patents
Rolling method for a strip, in particular a metal strip Download PDFInfo
- Publication number
- EP0936002B1 EP0936002B1 EP99102576A EP99102576A EP0936002B1 EP 0936002 B1 EP0936002 B1 EP 0936002B1 EP 99102576 A EP99102576 A EP 99102576A EP 99102576 A EP99102576 A EP 99102576A EP 0936002 B1 EP0936002 B1 EP 0936002B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- rolling
- thickness
- roll
- 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.)
- Expired - Lifetime
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims description 11
- 239000002184 metal Substances 0.000 title claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 14
- 238000005098 hot rolling Methods 0.000 claims description 5
- 238000005097 cold rolling Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B21B37/16—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
Definitions
- Such a rolling process is for example from DE 29 44 035 C2 known.
- the object of the present invention is a method state at which the impact on the Rolling process when changing the strip thickness as short a transition area as possible accrues.
- the object is achieved in that the changes in the nominal thickness values in the possible one downstream of the rolling stand Roll stands in such a way that for each of these roll stands Quotient of its current thickness setpoint and its current one Target inlet thickness is a constant.
- the peculiarity of the rolling process is that only in a change in the first rolling stand rolling the change in thickness relative thickness decrease occurs in all subsequent rolling stands however the relative decrease always remains constant. This will minimizes the mass flow disturbance between the mill stands, and it is no or only a very slight adjustment of the speeds of the Roll stands required. Thus, the length of the transition area be kept very short.
- Roll stands Due to the constant relative decrease in stitch in the following Roll stands are of course also their target thickness values possibly changed in a ramp shape. With a desired change in thickness behind the last rolling stand can also be this relationship between the thickness setpoints all other changes the target thickness values in the upstream rolling stands predict.
- a cold rolling mill consists, for example, of six rolling stands 1 to 6 arranged one behind the other.
- a steel strip 7 is rolled from an initial thickness d 0 to a final thickness d 6 .
- the strip 7 is first unwound from a decoiler 8, then passes through a strip store 9 and is then threaded into the rolling train. After the rolling mill, the strip 7 is wound up on a reel 10. During the rolling of the strip 7, the strip 7 should run into each of the roll stands 1 to 6 with a nominal inlet thickness e 1 * to e 6 * according to a rolling schedule. Each of the roll stands 1 to 6 is also given a target thickness value a 1 * to a 6 * with which the strip 7 is to run out of the respective roll stand 1 to 6.
- the strip store 9 between the uncoiler 8 and the first roll stand 1 is used to store a certain amount of tape 7. So can cause short disruptions when unwinding or welding on new belt 11 to a belt already entering the rolling mill 7 can be bridged without causing the rolling mill to stop comes.
- the new strip 11 applied has a different strip thickness d 0 than the currently rolled strip 7.
- the applied strip 11 is therefore subjected to different rolling conditions.
- a transition region 7 'must therefore be provided, in which the rolling conditions are adapted to the new strip 11.
- the nominal thickness value a 1 * of the first roll stand 1 is changed in a ramp-like manner from an initial nominal value to an end nominal value during the rolling of the transition region 7 'of the strip 7.
- the thickness setpoints a 2 * to a 6 * are also changed in a ramp from initial setpoints to end setpoints. The changes take place in each of the roll stands 2 to 6 at the point in time at which the transition region 7 'is rolled by the respective roll stand 2 to 6.
- the ramp-shaped changes in the target thickness values a 2 * to a 6 * take place in such a way that in each of the roll stands 2 to 6 the quotient of the current target thickness value a 2 * to a 6 * of this roll stand 2 to 6 and the current target Inlet thickness e 2 * to e 6 * of this roll stand 2 to 6 is a constant.
- changing the thickness setpoint can be limited to a part of the roll stands 1 to 6, e.g. B. on the last three roll stands 4 to 6.
- the thickness setpoints a 1 * to a 3 * of the roll stands 1 to 3 are kept constant, while the thickness setpoints a 4 * to a 6 * of the roll stands 4 to 6 can be changed in a ramp.
- a change in the relative pass reduction takes place only in the fourth roll stand 4. The relative pass decreases of the roll stands 5 and 6 remain constant. This case is shown in Figure 2.
- the control dynamics of the roll stands 1 to 6 allow it, even the nominal thickness values a 1 * to a 4 * or a 5 * of the roll stands 1 to 4 or 5 can be kept constant. In this case, only the thickness setpoints a 5 * and a 6 * of the last two roll stands 5, 6 or only the thickness setpoint a 6 * of the last roll stand 6 need to be changed from an initial setpoint to an end setpoint ,
- the method according to the invention can also be used in hot rolling mills.
- a hot rolling mill is shown in Figure 3.
- a descaler 12 and a compensating furnace 13 are arranged in front of the first roll stand 1.
- the slab 14 is heated through before being introduced into the hot rolling mill and, if necessary, also temporarily stored.
- the slab 14 is to be rolled into two or three strips with different final thicknesses a 6 *.
- the individual strips are then separated behind the last roll stand 6 by means of a pair of scissors 15 and alternately wound onto one of the reels 10, 10 '.
Abstract
Description
Die vorliegende Erfindung betrifft ein Walzverfahren für ein Band, insbesondere ein Metallband, zum Beispiel ein Stahlband, in einer Walzstraße mit mehreren hintereinander angeordneten Walzgerüsten,
- wobei während des Walzens des Bandes dieses in jedes der Walzgerüste mit einer Soll-Einlaufdicke einlaufen soll und jedem der Walzgerüste ein Dicken-Sollwert vorgegeben wird, mit dem das Band aus dem jeweiligen Walzgerüst auslaufen soll,
- wobei während des Walzens eines Übergangsbereichs des Bandes der Dicken-Sollwert eines der Walzgerüste von einem Anfangsauf einen End-Sollwert geändert wird,
- wobei in etwaigen dem einen Walzgerüst nachgeordneten Walzgerüsten während des Walzens des Übergangsbereichs des Bandes deren Dicken-Sollwerte ebenfalls von Anfangs- in End-Sollwerte geändert werden.
- wherein during the rolling of the strip it is to run into each of the roll stands with a target inlet thickness and a target thickness value is specified for each of the roll stands with which the strip is to run out of the respective roll stand,
- wherein during the rolling of a transition region of the strip, the thickness setpoint of one of the roll stands is changed from an initial to an end setpoint,
- wherein in any roll stands arranged downstream of the one roll stand, during the rolling of the transition region of the strip, the desired thickness values are also changed from the initial to the final desired values.
Ein derartiges Walzverfahren ist beispielsweise aus der DE 29 44 035 C2 bekannt.Such a rolling process is for example from DE 29 44 035 C2 known.
Beim Walzen von Band soll dieses möglichst eine gleichmäßige Dicke über die Länge aufweisen. Wenn daher in einem Übergangsbereich die Banddicke von einem Anfangswert auf einen Endwert geändert wird, ist der Übergangsbereich des Bandes unbrauchbar. Er muß als Schrott entsorgt werden. When rolling strip, this should be as uniform as possible in thickness have along the length. If, therefore, in a transition area Strip thickness is changed from an initial value to an end value, the transition area of the belt is unusable. It has to be scrap to be disposed of.
Die Aufgabe der vorliegenden Erfindung besteht darin, ein Verfahren anzugeben, bei dem bei möglichst geringen Auswirkungen auf den Walzprozeß beim Banddickenwechsel ein möglichst kurzer Übergangsbereich anfällt.The object of the present invention is a method state at which the impact on the Rolling process when changing the strip thickness as short a transition area as possible accrues.
Die Aufgabe wird dadurch gelöst, daß die Änderungen der Dicken-Sollwerte in den etwaigen dem einen Walzgerüst nachgeordneten Walzgerüsten derart erfolgt, daß für jedes dieser Walzgerüste der Quotient aus dessen momentanen Dicken-Sollwert und dessen momentaner Soll-Einlaufdicke eine Konstante ist.The object is achieved in that the changes in the nominal thickness values in the possible one downstream of the rolling stand Roll stands in such a way that for each of these roll stands Quotient of its current thickness setpoint and its current one Target inlet thickness is a constant.
Die Besonderheit des Walzverfahrens besteht also darin, daß nur im ersten die Dickenänderung walzenden Walzgerüst eine Änderung der relativen Dickenabnahme erfolgt, in allen nachfolgenden Walzgerüsten hingegen die relative Abnahme immer konstant bleibt. Dadurch wird die Massenflußstörung zwischen den Walzgerüsten minimiert, und es ist keine bzw. eine nur sehr geringe Anpassung der Drehzahlen der Walzgerüste erforderlich. Somit kann die Länge des Übergangsbereichs sehr kurz gehalten werden.The peculiarity of the rolling process is that only in a change in the first rolling stand rolling the change in thickness relative thickness decrease occurs in all subsequent rolling stands however the relative decrease always remains constant. This will minimizes the mass flow disturbance between the mill stands, and it is no or only a very slight adjustment of the speeds of the Roll stands required. Thus, the length of the transition area be kept very short.
Um eine Veränderung der Dicken-Sollwerte in den nachfolgenden Gerüsten zum richtigen Zeitpunkt zu bewirken, ist selbstverständlich eine genaue Bandverfolgung notwendig. Derartige Bandverfolgungssysteme sind aber allgemein bekannt.To change the target thickness values in the following It goes without saying that setting up scaffolding at the right time accurate band tracking is necessary. Such tape tracking systems but are generally known.
Stoßartige Belastungen der Walzgerüste können insbesondere dann vermieden werden, wenn der Dicken-Sollwert des einen Walzgerüsts während des Walzens des Übergangsbereichs des Bandes rampenförmig geändert wird.Sudden loads on the roll stands can then occur in particular can be avoided if the thickness setpoint of one roll stand ramping during rolling of the transition area of the strip will be changed.
Aufgrund der konstanten relativen Stichabnahme in den nachfolgenden Walzgerüsten werden selbstverständlich auch deren Dicken-Sollwerte gegebenfalls rampenförmig verändert. Bei einer gewünschten Dickenänderung hinter dem letzten Walzgerüst lassen sich ferner aufgrund dieser Beziehung zwischen den Dicken-Sollwerten alle anderen Änderungen der Dicken-Sollwerte in den vorgeordneten Walzgerüsten vorausberechnen.Due to the constant relative decrease in stitch in the following Roll stands are of course also their target thickness values possibly changed in a ramp shape. With a desired change in thickness behind the last rolling stand can also be this relationship between the thickness setpoints all other changes the target thickness values in the upstream rolling stands predict.
Bei dem erfindungsgemäßen Walzverfahren findet fast die gesamte Massenflußänderung vor dem einen Walzgerüst statt. In den nachgeordneten Walzgerüsten ergeben sich nur sehr geringe Massenflußänderungen aufgrund der geringen Voreilungsänderungen.In the rolling process according to the invention, almost all of it takes place Mass flow change in front of a roll stand instead. In the subordinate Roll stands result in only very small changes in mass flow due to the small changes in advance.
Weitere Vorteile und Einzelheiten ergeben sich aus den weiteren Ansprüchen sowie der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei zeigen:
Figur 1- eine sechsgerüstige Kaltwalzstraße,
- Figur 2
- einen Dicken-Sollwertverlauf für die letzten drei Walzgerüste und
Figur 3- eine sechsgerüstige Warmwalzstraße.
- Figure 1
- a six-stand cold rolling mill,
- Figure 2
- a setpoint thickness curve for the last three roll stands and
- Figure 3
- a six-stand hot rolling mill.
Gemäß Figur 1 besteht eine Kaltwalzstraße aus - beispielhaft - sechs
hintereinander angeordneten Walzgerüsten 1 bis 6. In der Walzstraße
wird ein Stahlband 7 von einer Anfangsdicke d0 auf eine Enddicke d6
gewalzt.According to FIG. 1, a cold rolling mill consists, for example, of six rolling
Zum Walzen wird das Band 7 zunächst von einem Abhaspel 8 abgehaspelt,
durchläuft sodann einen Bandspeicher 9 und wird dann in die
Walzstraße eingefädelt. Hinter der Walzstraße wird das Band 7 auf
einem Aufhaspel 10 aufgehaspelt. Während des Walzens des Bandes 7
soll gemäß einem Walzplan das Band 7 in jedes der Walzgerüste 1 bis
6 mit einer Soll-Einlaufdicke e1* bis e6* einlaufen. Jedem der
Walzgerüste 1 bis 6 wird ferner ein Dicken-Sollwert a1* bis a6* vorgegeben,
mit dem das Band 7 aus dem jeweiligen Walzgerüst 1 bis 6
auslaufen soll. For rolling, the strip 7 is first unwound from a decoiler 8, then passes through a strip store 9 and is then threaded into the rolling train. After the rolling mill, the strip 7 is wound up on a
Der Bandspeicher 9 zwischen dem Abhaspel 8 und dem ersten Walzgerüst
1 dient der Speicherung einer gewissen Menge des Bandes 7. Damit
können kurze Störungen beim Abhaspeln bzw. das Anschweißen eines
neuen Bandes 11 an ein bereits in die Walzstraße einlaufendes Band
7 überbrückt werden, ohne daß es zu einem Stillstand der Walzstraße
kommt.The strip store 9 between the uncoiler 8 and the
Üblicherweise weist das angesetzte neue Band 11 eine andere Banddicke
d0 auf als das momentan gewalzte Band 7. Das angesetzte Band
11 ist daher anderen Walzbedingungen unterworfen. Im Bereich der
Nahtstelle zwischen den beiden Bändern 7, 11 muß daher ein Übergangsbereich
7' vorgesehen werden, in dem die Walzbedingungen an
das neue Band 11 angepaßt werden.Usually, the
Zur Anpassung der Walzbedingungen wird der Dicken-Sollwert a1* des
ersten Walzgerüsts 1 während des Walzens des Übergangsbereichs 7'
des Bandes 7 rampenförmig von einem Anfangs-Sollwert auf einen End-Sollwert
geändert. In den nachgeordneten Walzgerüsten 2 bis 6 werden
die Dicken-Sollwerte a2* bis a6* ebenfalls rampenförmig von Anfangs-Sollwerten
auf End-Sollwerte geändert. Die Änderungen erfolgen dabei
in jedem der Walzgerüste 2 bis 6 zu dem Zeitpunkt, in dem der
Übergangsbereich 7' von dem jeweiligen Walzgerüst 2 bis 6 gewalzt
wird. Die rampenförmigen Änderungen der Dicken-Sollwerte a2* bis a6*
erfolgen derart, daß in jedem der Walzgerüste 2 bis 6 der Quotient
aus dem momentanen Dicken-Sollwert a2* bis a6* dieses Walzgerüsts
2 bis 6 und der momentanen Soll-Einlaufdicke e2* bis e6* dieses
Walzgerüsts 2 bis 6 eine Konstante ist.In order to adapt the rolling conditions, the nominal thickness value a 1 * of the
Alternativ kann es auch erforderlich sein, während des Walzens eines Bandes 7 innerhalb dieses Bandes 7 eine Dickenänderung durchzuführen. In diesem Fall kann das Ändern des Dicken-Sollwerts auf einen Teil der Walzgerüste 1 bis 6 beschränkt bleiben, z. B. auf die letzten drei Walzgerüste 4 bis 6. In diesem Fall werden die Dicken-Sollwerte a1* bis a3* der Walzgerüste 1 bis 3 konstant gehalten, während die Dicken-Sollwerte a4* bis a6* der Walzgerüste 4 bis 6 rampenförmig verändert werden. Eine Änderung der relativen Stichabnahme erfolgt dabei nur im vierten Walzgerüst 4. Die relativen Stichabnahmen der Walzgerüste 5 und 6 bleiben konstant. Dieser Fall ist in Figur 2 dargestellt.Alternatively, it may also be necessary to change the thickness of a strip 7 within this strip 7. In this case, changing the thickness setpoint can be limited to a part of the roll stands 1 to 6, e.g. B. on the last three roll stands 4 to 6. In this case, the thickness setpoints a 1 * to a 3 * of the roll stands 1 to 3 are kept constant, while the thickness setpoints a 4 * to a 6 * of the roll stands 4 to 6 can be changed in a ramp. A change in the relative pass reduction takes place only in the fourth roll stand 4. The relative pass decreases of the roll stands 5 and 6 remain constant. This case is shown in Figure 2.
Falls die Regeldynamik der Walzgerüste 1 bis 6 es erlaubt, können
sogar die Dicken-Sollwerte a1* bis a4* bzw. a5* der Walzgerüste 1 bis
4 bzw. 5 konstant gehalten werden. In diesem Fall müssen lediglich
die Dicken-Sollwerte a5* und a6* der letzten beiden Walzgerüste 5,
6 bzw. muß lediglich der Dicken-Sollwert a6* des letzten Walzgerüsts
6 von einem Anfangs-Sollwert auf einen End-Sollwert geändert werden.If the control dynamics of the roll stands 1 to 6 allow it, even the nominal thickness values a 1 * to a 4 * or a 5 * of the roll stands 1 to 4 or 5 can be kept constant. In this case, only the thickness setpoints a 5 * and a 6 * of the last two roll stands 5, 6 or only the thickness setpoint a 6 * of the
Das erfindungsgemäße Verfahren ist prinzipiell auch bei Warmwalzwerken
anwendbar. Ein derartiges Warmwalzwerk ist in Figur 3 dargestellt.
Gemäß Figur 3 sind vor dem ersten Walzgerüst 1 ein Entzunderer
12 und ein Ausgleichsofen 13 angeordnet. Im Ausgleichsofen 13
wird eine Bramme 14 vor dem Einführen in die Warmwalzstraße durchgewärmt
und ggfs. auch zwischengespeichert. Die Bramme 14 soll bspw.
zu zwei oder drei Bändern mit verschiedenen Enddicken a6* gewalzt
werden. An den Bandgrenzen muß daher zumindest der Dickensollwert
a6* des letzten Walzgerüsts 6, ggf. auch weiterer der Walzgerüste
1 bis 5 geändert werden. Dies kann nach dem obenstehend in Verbindung
mit einem Kaltwalzwerk beschriebenen Verfahren erfolgen.
Die einzelnen Bänder werden dann hinter dem letzten Walzgerüst 6
mittels einer Schere 15 getrennt und abwechselnd auf einen der
Haspel 10, 10' aufgehaspelt. In principle, the method according to the invention can also be used in hot rolling mills. Such a hot rolling mill is shown in Figure 3. According to FIG. 3, a
- 1 - 61 - 6
- Walzgerüsterolling mills
- 77
- Bandtape
- 7'7 '
- ÜbergangsbereichTransition area
- 88th
- Abhaspeluncoiler
- 99
- Bandspeichertape storage
- 10, 10'10, 10 '
- Aufhaspelcoiler
- 1111
- neues Bandnew tape
- 1212
- Entzundererdescaler
- 1313
- Ausgleichsofensoaking furnace
- 1414
- Brammeslab
- 1515
- Scherescissors
- a1* - a6*a 1 * - a 6 *
- Dicken-SollwerteThick-set points
- d0 d 0
- Anfangsdickeinitial thickness
- d6 d 6
- Enddickefinal thickness
- e1* - e6*e 1 * - e 6 *
- Soll-EinlaufdickenTarget inlet thicknesses
Claims (6)
- Rolling method for a strip (7), particularly a metal strip (7), for example a steel strip (7), in a rolling train with several roll stands (1 to 6) arranged in succession,wherein during the rolling of the strip (7) this is to run into each of the roll stands (1 to 6) at a target entry thickness (e1* to e6*) and a thickness target value (a1* to a6*), at which the strip (7) is to run out of the respective roll stand (1 to 6), is preset at each of the roll stands (1 to 6),wherein during the rolling of a transition region (7') of the strip (7) the thickness target value (for example a4*) of one of the roll stands (for example 4) is changed from an initial to a final target value,wherein in any of the roll stands (for example 5, 6) downstream of the one roll stand (for example 4) during rolling of the transition region (7') of the strip (7) the thickness target values thereof (for example a5*, a6*) are similarly changed from initial to final target values, andwherein the changes in the thickness target values (for example a5*, a6*) in the any roll stands (for example 5, 6) arranged downstream of the one roll stand (for example 4) take place in such a manner that for each of these roll stands (for example 5, 6) the quotient of the instantaneous thickness target value thereof (for example a5*, a6*) and the instantaneous target entry thickness thereof (for example e5*, e6*) is a constant.
- Rolling method according to claim 1, characterised in that the thickness target value (for example a4*) of the one roll stand (for example 4) is changed in ramp-shaped manner during rolling of the transition region (7') of the strip (7).
- Rolling method according to claim 1 or 2, characterised in that at least one roll stand (for example 6) is arranged downstream of the one roll stand (for example 5).
- Rolling method according to claim 3, characterised in that the one roll stand (1) is the first roll stand (1) of the rolling train.
- Rolling method according to one of claims 1 to 4, characterised in that it is used in a hot rolling mill.
- Rolling method according to one of claims 1 to 4, characterised in that it is used in a cold rolling mill.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19806161A DE19806161A1 (en) | 1998-02-14 | 1998-02-14 | Rolling process for a strip, in particular a metal strip |
| DE19806161 | 1998-02-14 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0936002A2 EP0936002A2 (en) | 1999-08-18 |
| EP0936002A3 EP0936002A3 (en) | 2001-01-03 |
| EP0936002B1 true EP0936002B1 (en) | 2003-10-22 |
Family
ID=7857778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99102576A Expired - Lifetime EP0936002B1 (en) | 1998-02-14 | 1999-02-11 | Rolling method for a strip, in particular a metal strip |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6035684A (en) |
| EP (1) | EP0936002B1 (en) |
| AT (1) | ATE252424T1 (en) |
| DE (2) | DE19806161A1 (en) |
| ES (1) | ES2210871T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19950609C2 (en) * | 1999-10-21 | 2001-10-18 | Bwg Bergwerk Walzwerk | Process for reducing the scrap length when rolling metal strips connected by means of weld seams and tandem mill for carrying out the process |
| US20090273135A1 (en) * | 2008-05-05 | 2009-11-05 | Bowe Bell + Howell Scanners L.L.C. | Feeder system with independent control of rollers |
| JP6628049B2 (en) * | 2017-04-07 | 2020-01-08 | Ｊｆｅスチール株式会社 | Method of changing strip thickness in tandem rolling mill |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4936548B1 (en) * | 1970-03-16 | 1974-10-01 | ||
| US3807206A (en) * | 1972-09-29 | 1974-04-30 | J Connors | Strip gage change during rolling in a tanden rolling mill |
| JPS5561306A (en) * | 1978-11-01 | 1980-05-09 | Mitsubishi Electric Corp | Changing system for rolling schedule while running rolling stand |
| JPS5666315A (en) * | 1979-10-31 | 1981-06-04 | Sumitomo Metal Ind Ltd | Controlling method for sheet thickness in strip mill |
| JPS60148621A (en) * | 1984-01-13 | 1985-08-05 | Kawasaki Steel Corp | Running plate thickness changing method of tandem rolling mill |
| JPH05200420A (en) * | 1992-01-28 | 1993-08-10 | Toshiba Corp | Plate thickness controller for rolling mat roll |
| DE19505694C1 (en) * | 1995-02-20 | 1996-07-04 | Siemens Ag | Appts. for controlling the thickness of rolled material |
| KR100241167B1 (en) * | 1995-04-18 | 2000-03-02 | 에모토 간지 | Hot-rolling method of steel piece joint during continuous hot-rolling |
-
1998
- 1998-02-14 DE DE19806161A patent/DE19806161A1/en not_active Withdrawn
-
1999
- 1999-02-10 US US09/247,456 patent/US6035684A/en not_active Expired - Fee Related
- 1999-02-11 ES ES99102576T patent/ES2210871T3/en not_active Expired - Lifetime
- 1999-02-11 AT AT99102576T patent/ATE252424T1/en active
- 1999-02-11 EP EP99102576A patent/EP0936002B1/en not_active Expired - Lifetime
- 1999-02-11 DE DE59907404T patent/DE59907404D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2210871T3 (en) | 2004-07-01 |
| EP0936002A2 (en) | 1999-08-18 |
| US6035684A (en) | 2000-03-14 |
| EP0936002A3 (en) | 2001-01-03 |
| DE19806161A1 (en) | 1999-08-19 |
| DE59907404D1 (en) | 2003-11-27 |
| ATE252424T1 (en) | 2003-11-15 |
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