WO1999002281A1 - Verfahren und einrichtung zum walzen eines metallbandes - Google Patents
Verfahren und einrichtung zum walzen eines metallbandes Download PDFInfo
- Publication number
- WO1999002281A1 WO1999002281A1 PCT/DE1998/001771 DE9801771W WO9902281A1 WO 1999002281 A1 WO1999002281 A1 WO 1999002281A1 DE 9801771 W DE9801771 W DE 9801771W WO 9902281 A1 WO9902281 A1 WO 9902281A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal strip
- hardness
- thickness
- skin pass
- target
- Prior art date
Links
- 239000002184 metal Substances 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 title 1
- 238000005097 cold rolling Methods 0.000 claims abstract description 38
- 238000000137 annealing Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract 3
- 239000010959 steel Substances 0.000 claims abstract 3
- 230000000694 effects Effects 0.000 claims description 14
- 238000009864 tensile test Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 28
- 230000007423 decrease Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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
-
- 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
- B21B1/24—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 in a continuous or semi-continuous process
- B21B1/28—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 in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/22—Hardness
Definitions
- the invention relates to a method and a device for rolling a metal strip by means of a cold rolling mill, which are followed by an annealing section and a skin pass. It has been shown that it is difficult to achieve the desired material hardness in such rolling mills.
- the object is achieved by a method according to claim 1 or a device according to claim 14.
- the outlet thickness or the target thickness of the metal strip when it leaves the cold rolling mill is determined as a function of the target hardness and the target thickness when it leaves the skin pass. In this way it is possible to achieve the desired target hardness when the rolled strip runs out of the skin pass.
- the effect of the skin pass part in particular the relationship between the hardness of the metal strip and the degree of thickness reduction of the metal strip, and the effect of the annealing section, in particular on the hardness of the material, are taken into account.
- the thickness of the rolled strip as it emerges from the cold rolling mill Art specified that when reducing the thickness of the metal strip in the skin pass to the desired target thickness of the metal strip also sets the desired target hardness. It has been shown that in this way the precision when the desired target hardness of the metal strip is reached when it runs out of the skin pass can be significantly improved.
- the effect of the skin pass i.e. in particular the relationship between the hardness of the metal strip and the degree of thickness reduction of the metal strip, from the effect of the cold rolling mill, i.e. determined in particular from the relationship between the hardness of the metal strip and the degree of thickness reduction of the metal strip m of the cold rolling mill.
- the modeling of the relationship between the degree of thickness reduction of the metal strip and the hardness of the material is based on the relationship between the degree of thickness reduction of the metal strip and the hardness of the material on the stands of the cold rolling mill or on some selected stands of the cold rolling mill.
- the effect of the skin pass in particular the relationship between the hardness of the metal strip and the degree of thickness reduction of the metal strip, is determined in advance, in particular by tensile tests.
- the determined effect of the skin pass is compared by comparing a measured value of the actual hardness and the target hardness of the metal strip when it runs out of the skin pass in order to reduce the deviation between corrected the target hardness and the measured value of the actual hardness of the metal strip when it runs out of the skin pass.
- the desired value for the thickness or the desired thickness of the metal strip is obtained by comparing the actual hardness and the target hardness of the Corrected metal strip when leaving the skin pass in the sense of reducing the deviation between the target hardness and the actual hardness of the metal strip when leaving the skin part.
- the method according to the invention is used particularly advantageously when achieving a constant material hardness over the entire length of the metal strip, which largely prevents rejects.
- the thickness of the metal strip in the skin pass is reduced by at least 10%, in particular by at least 20%. It is also particularly advantageous to reduce the thickness of the metal strip in the skin pass part by 20 to 40%.
- FIG. 2 shows the determination of a correction factor according to the invention.
- FIG. 3 shows a method for achieving a constant hardness over the length of the metal strip
- a rolling mill 1 shows a rolling mill for carrying out the 'method according inventiveness.
- a cold rolling mill 2 with, for example, four stands 21, 22, 23, 24 is followed by an annealing section 3 and a skin pass 4.
- the relationships shown in function blocks 5, 6 and 7 show the change in the material hardness in the cold rolling mill 2, in the annealing section 3 and in the skin pass section 4.
- a metal strip with a thickness of HE K TM and a hardness of KF 0 runs into the cold rolling mill 2 and runs with the thickness HAKTM and the hardness KF KM from Kaltwalz Found 2.
- Function block 5 shows the physical relationship between the material hardness KF and the degree of thickness reduction EPS of the metal strip.
- the degree of thickness reduction EPS is defined as
- HA where HE is the inlet thickness and HA is the outlet thickness of the metal strip.
- the material hardness KF decreases as a function of the reduction in thickness of the metal strip in the cold rolling mill, as function block 6 shows.
- the metal strip After passing through the annealing section 3, the metal strip has the material hardness KF 0 .
- the skin pass part 4 has two roll stands 41 and 42.
- the rolled strip is substantially reduced by means of the first frame 41.
- the desired surface quality and flatness of the rolled strip is achieved by means of the second stand 42.
- the rolling strip entering the skin pass 4 with the strip thickness HE DCR and material hardness KF_, m ends with the strip thickness HA DC R and the material hardness KF DCR , as function block 7 shows.
- the pair of values HA KT M and KF KTM is set in accordance with the relationships according to function blocks 6 and 7 in such a way that the desired values for the outlet thickness HA DCR and the material hardness KF DCR are achieved by means of the thickness reduction in the pressing part 4.
- the hardness of the metal strip is in turn reduced to the hard KF 0 , ie 300 N / mm 2.
- the subsequent reduction of the metal strip in skin pass 4 from an input hardness HE DCR of 0.5 mm to an output hardness HA DCR of 0.3 mm makes the hard KF DC of the metal strip when it comes out of the skin pass 4 to the desired 450 N / mm 2.
- a hard variation of approx. 35% can be achieved with the acceptance variation in the skin pass of 10 ... 40 ° o .
- the entry thickness HE DCR m of the skin pass 4 can be varied from 0.33 to 0.5 mm. This variation allows a material strength change of KF DCR from 330 N / mrtr to 440 N / mm 2 .
- a model according to Appendix 1 is particularly advantageous. It has also proven to be advantageous to adopt the model for the relationship between material hardness KF and thickness reduction degree EPS for the cold rolling mill also for the skin pass 4.
- the relationship between hardness KF of the metal strip and degree of thickness reduction EPS of the metal strip determined for the cold rolling mill is particularly advantageous by comparing the actual hardness and the target hardness when the metal strip runs out of the skin pass 4 in the sense of a reduction in the deviation between the target hardness and the actual hardness when it runs out the skin pass 4 corrected. Such a correction is shown in FIG. 2.
- the material strength in the skin pass part can be set according to the following automation levels:
- Pilot control 8 by calculating and rolling an exit thickness HA K T M in the cold rolling mill in accordance with the target value for the hard HKF DCR and the thickness HA DCR of the metal strip after the skin pass part 4.
- the exit thickness HA KTM of the metal strip is calculated in the control 8 in accordance with the desired hardness KF DCR of the metal strip. This takes place depending on the thickness of the metal strip HA DCR when it leaves the skin pass, the hardness KF DCR of the metal strip when it leaves the skin pass, the thickness HE K _ M of the metal strip when it enters the cold rolling mill and the material properties M ⁇ of the roll.
- the output variables of the control 8 are the thickness HA TM of the metal strip when it leaves the cold rolling mill and material parameters M E of the metal strip. These material parameters ME are essentially parameters that describe the hardness KF DCR of the metal strip.
- the parameters KFO, KFI and KFE describe the relationship between the hardness KF DCR of the metal strip and the degree of thickness reduction of the metal strip. Details on this model formation can be found in Appendix 1.
- the feedback 9 determines a correction value ⁇ , with which the value for the thickness HA_ M of the metal strip is corrected when it leaves the cold rolling mill. It has proven to be particularly advantageous to multiply the correction parameter ⁇ and the desired thickness HA KTM of the metal strip when it leaves the cold rolling mill.
- the correction parameter ⁇ is formed in such a way that the deviation between the actual thickness HA DCR of the metal strip when it runs out of the skin pass part and the corresponding target value is minimized.
- a faster cooling of the outer and inner turns after the hot rolling mill results in a higher strength of the strip ends.
- Even an intermediate glow after the cold rolling mill cannot eliminate this effect, as curve 13 in FIG. 3 shows, which shows the course of the hardness KF 0 of the metal strip over the length BL of the metal strip.
- these ends In the case of deep-drawing material in particular, these ends generally have to be cut off after the skin pass, since the hardness KF DCR of the metal strip should be constant over the length of the strip. The high proportion of scrap and the additional effort lead to a high cost burden.
- a change in decrease means a change in thickness of 50 ⁇ m or 6%.
- FIG. 3 illustrate the use of the method according to the invention to achieve a constant hardness KF over the length of the metal strip.
- the metal strip When leaving the cold rolling mill, the metal strip has a hardness KF 0 according to curve 13. At the ends of the strip, ie in areas 10 and 12, the metal strip has a greater hardness than in the central area.
- the areas 10 and 12 can comprise, for example, a band length of 50 m.
- the cold rolling mill is set such that the metal strip has a thickness corresponding to curve 14 when it leaves the cold rolling mill.
- the course of the curve 14 is chosen such that at a thickness reduction EPS D _ R in the trussing member, as it shows curve 15, a constant course of the dictated ke HA TLC R and the hardness KF DCR of the metal strip corresponding to the curves 16 and 17 sets. ke sets HA DCR and the hardness KF DCP of the metal band according to curves 16 and 17.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98941242A EP0994756A1 (de) | 1997-07-11 | 1998-06-26 | Verfahren und einrichtung zum walzen eines metallbandes |
US09/462,657 US6240757B1 (en) | 1997-07-11 | 1998-06-26 | Process and installation for rolling a metal strip |
KR1020007000291A KR100356947B1 (ko) | 1997-07-11 | 1998-06-26 | 금속 스트립을 압연하기 위한 방법 및 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19729773.0 | 1997-07-11 | ||
DE19729773A DE19729773C5 (de) | 1997-07-11 | 1997-07-11 | Verfahren und Einrichtung zum Walzen eines Metallbandes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999002281A1 true WO1999002281A1 (de) | 1999-01-21 |
Family
ID=7835413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001771 WO1999002281A1 (de) | 1997-07-11 | 1998-06-26 | Verfahren und einrichtung zum walzen eines metallbandes |
Country Status (6)
Country | Link |
---|---|
US (1) | US6240757B1 (de) |
EP (1) | EP0994756A1 (de) |
KR (1) | KR100356947B1 (de) |
CN (1) | CN1122585C (de) |
DE (1) | DE19729773C5 (de) |
WO (1) | WO1999002281A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031462A1 (de) * | 2005-07-04 | 2007-01-11 | Bilstein Gmbh & Co. Kg | Verfahren zur Herstellung eines mikrolegierten Kaltbandes mit einer bei vorgegebener Festigkeit erhöhten Dehnung |
CN102672415A (zh) * | 2012-05-03 | 2012-09-19 | 安徽工业大学 | 一种降低钢板切后翘曲的钢卷开平方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10110323A1 (de) * | 2001-03-03 | 2002-09-05 | Sms Demag Ag | Verfahren zur gezielten Einstellung der Oberflächenstruktur von Walzgut beim Kaltnachwalzen in Dressier-Walzgerüsten |
US6948347B2 (en) * | 2003-01-24 | 2005-09-27 | Isg Technologies Inc. | Graphical rolled steel sheet flatness display and method of using same |
EP2662158A1 (de) * | 2012-05-07 | 2013-11-13 | Siemens Aktiengesellschaft | Verfahren zur Bearbeitung von Walzgut und Walzwerk |
KR102008883B1 (ko) | 2014-01-16 | 2019-08-08 | 동우 화인켐 주식회사 | 전자재료용 세정액 조성물 |
KR102028006B1 (ko) | 2014-01-16 | 2019-10-02 | 동우 화인켐 주식회사 | 전자재료용 세정액 조성물 |
CN112371730B (zh) * | 2020-10-19 | 2022-04-19 | 马鞍山钢铁股份有限公司 | 一种连续热浸镀锌成品带钢尺寸公差的控制方法 |
CN112453071B (zh) * | 2020-11-17 | 2022-07-01 | 太原理工大学 | 一种冷轧金属复合板的轧制力和各层厚度预测方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2287380A (en) * | 1940-10-15 | 1942-06-23 | Clarence J Klein | Metal rolling |
JPS5594722A (en) * | 1979-01-11 | 1980-07-18 | Nippon Steel Corp | Temper rolling method for thin steel sheet |
US4596608A (en) * | 1985-04-15 | 1986-06-24 | Toyo Kohan Co., Ltd. | Method of manufacturing of steel sheet for easy open end can with superior openability |
JPS61159213A (ja) * | 1984-12-29 | 1986-07-18 | Nippon Steel Corp | 帯鋼板の板硬度制御方法 |
JPS61165206A (ja) * | 1985-01-16 | 1986-07-25 | Kawasaki Steel Corp | 特殊鋼の連続冷間圧延方法および連続冷間圧延設備 |
EP0391658A1 (de) * | 1989-04-07 | 1990-10-10 | Kawasaki Steel Corporation | Nass-Kaltwalzverfahren |
DE4015750A1 (de) * | 1989-05-19 | 1990-11-22 | Karl Heinz Dr Ing Koethemann | Verfahren zur herstellung von kaltgewalzten baendern aus nichteisenmetall, eisen und deren legierungen |
EP0679451A1 (de) * | 1994-04-27 | 1995-11-02 | Hoogovens Staal B.V. | Vorrichtung und Verfahren zur Herstellung von zweimal gewaltzem Stahlband |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE6900226U (de) * | 1969-01-04 | 1969-05-14 | Stotz Kontakt Gmbh | Elektronik-baustein |
JPS5225824B2 (de) * | 1972-10-16 | 1977-07-09 | ||
US5197179A (en) * | 1991-04-18 | 1993-03-30 | T. Sendzimir, Inc. | Means and a method of improving the quality of cold rolled stainless steel strip |
US5412966A (en) * | 1993-07-16 | 1995-05-09 | Worldclass Industries, Inc. | Push-pull pickle line |
US5609053A (en) * | 1994-08-22 | 1997-03-11 | Alcan Aluminum Corporation | Constant reduction multi-stand hot rolling mill set-up method |
FR2773505B1 (fr) * | 1998-01-13 | 2000-02-25 | Lorraine Laminage | Procede de pilotage d'une operation d'ecrouissage en continu d'une bande metallique |
-
1997
- 1997-07-11 DE DE19729773A patent/DE19729773C5/de not_active Expired - Fee Related
-
1998
- 1998-06-26 WO PCT/DE1998/001771 patent/WO1999002281A1/de active IP Right Grant
- 1998-06-26 US US09/462,657 patent/US6240757B1/en not_active Expired - Lifetime
- 1998-06-26 KR KR1020007000291A patent/KR100356947B1/ko not_active IP Right Cessation
- 1998-06-26 EP EP98941242A patent/EP0994756A1/de not_active Ceased
- 1998-06-26 CN CN98807129A patent/CN1122585C/zh not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2287380A (en) * | 1940-10-15 | 1942-06-23 | Clarence J Klein | Metal rolling |
JPS5594722A (en) * | 1979-01-11 | 1980-07-18 | Nippon Steel Corp | Temper rolling method for thin steel sheet |
JPS61159213A (ja) * | 1984-12-29 | 1986-07-18 | Nippon Steel Corp | 帯鋼板の板硬度制御方法 |
JPS61165206A (ja) * | 1985-01-16 | 1986-07-25 | Kawasaki Steel Corp | 特殊鋼の連続冷間圧延方法および連続冷間圧延設備 |
US4596608A (en) * | 1985-04-15 | 1986-06-24 | Toyo Kohan Co., Ltd. | Method of manufacturing of steel sheet for easy open end can with superior openability |
EP0391658A1 (de) * | 1989-04-07 | 1990-10-10 | Kawasaki Steel Corporation | Nass-Kaltwalzverfahren |
DE4015750A1 (de) * | 1989-05-19 | 1990-11-22 | Karl Heinz Dr Ing Koethemann | Verfahren zur herstellung von kaltgewalzten baendern aus nichteisenmetall, eisen und deren legierungen |
EP0679451A1 (de) * | 1994-04-27 | 1995-11-02 | Hoogovens Staal B.V. | Vorrichtung und Verfahren zur Herstellung von zweimal gewaltzem Stahlband |
Non-Patent Citations (5)
Title |
---|
BRESSON P ET AL: "UTILISATION DE TECHNIQUES NEUROMIMETIQUES EN LAMINAGE A FROID AU SKIN-PASS DE SOLLAC FLORANGE", CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE, vol. 90, no. 7/08, 1 July 1993 (1993-07-01), pages 941 - 947, XP000397673 * |
DATABASE WPI Section Ch Week 8035, Derwent World Patents Index; Class M21, AN 80-61450C * |
PATENT ABSTRACTS OF JAPAN vol. 004, no. 139 (M - 034) 30 September 1980 (1980-09-30) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 365 (M - 542) 6 December 1986 (1986-12-06) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 372 (M - 544) 11 December 1986 (1986-12-11) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031462A1 (de) * | 2005-07-04 | 2007-01-11 | Bilstein Gmbh & Co. Kg | Verfahren zur Herstellung eines mikrolegierten Kaltbandes mit einer bei vorgegebener Festigkeit erhöhten Dehnung |
CN102672415A (zh) * | 2012-05-03 | 2012-09-19 | 安徽工业大学 | 一种降低钢板切后翘曲的钢卷开平方法 |
Also Published As
Publication number | Publication date |
---|---|
DE19729773C1 (de) | 1999-02-04 |
EP0994756A1 (de) | 2000-04-26 |
DE19729773C5 (de) | 2007-05-10 |
US6240757B1 (en) | 2001-06-05 |
KR100356947B1 (ko) | 2002-10-18 |
CN1122585C (zh) | 2003-10-01 |
KR20010015565A (ko) | 2001-02-26 |
CN1263483A (zh) | 2000-08-16 |
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