EP2344287A2 - Method and device for cooling a leader or band of a metal strand in a hot-rolling mill - Google Patents
Method and device for cooling a leader or band of a metal strand in a hot-rolling millInfo
- Publication number
- EP2344287A2 EP2344287A2 EP09778628A EP09778628A EP2344287A2 EP 2344287 A2 EP2344287 A2 EP 2344287A2 EP 09778628 A EP09778628 A EP 09778628A EP 09778628 A EP09778628 A EP 09778628A EP 2344287 A2 EP2344287 A2 EP 2344287A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- band
- rolling mill
- coolant
- cooling
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 238000005098 hot rolling Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 14
- 239000002826 coolant Substances 0.000 claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- 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
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- 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
- B21B15/0035—Forging or pressing devices as units
- B21B15/005—Lubricating, cooling or heating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
- B21B39/084—Looper devices
Definitions
- the invention relates to a method and apparatus for cooling a pre-strip or strip of a metal strand in a work rolls having hot rolling mill, in which a coolant is sprayed onto the pre-strip or the tape.
- cooling devices in the area of the roughing and finishing mill are known or defined, such as:
- the pre-strip cooling (arrangement between the roughing stand and the first finishing stand)
- the interstage cooling (arranged between two finishing stands)
- the various cooling devices influence surface temperature control, scale growth, mechanical properties, production volume, etc.
- the cooling effect is even over the bandwidth.
- the pre-strip temperature and the strip temperature are colder in the entire finishing line in the strip edge region.
- this effect is enhanced.
- the new cooling method or cooling device will be described in more detail in the exemplary example of roll gap cooling.
- a device of this kind is known from patent DE 4134599 C1. This is a method for hot rolling of metal strip with one or more stitches, wherein mainly on the inlet side of the rolling stand or the rolling stands, the pre-strip or the strip is cooled.
- the known method is characterized in that the spraying of the cooling liquid on the feed side takes place in a region extending over the entire width of the metal strip as close as possible to the roll gap on the metal strip and on the shells of the work rolls such that the strip surface is supercooled and so a lower heat flow is created in the work roll.
- the temperature of the pre-strip and the strip of a metal strip to be rolled in the strip edge region is lower than in the middle of the pre-strip or of the strip.
- the temperature of a metal strip is shown as a function of the width of the metal strip passing through stands of a hot rolling mill. In this case, the band center of the metal strip is shown on the left edge of the diagram.
- a curve 1 shows the course of the temperature before the shrinkage of the metal strip in a roll stand.
- a curve 2 shows the temperature profile after exiting the mill stand. Both curves show the strong temperature drop in the edge area of the metal strip.
- the temperature of the metal strip ie also of the pre-strip, in the Edge region is lower than in the middle, there is a different local load on the metal strip, which has a negative impact on both the work rolls and on the metal strip itself.
- the affected areas of the work rolls may wear more severely, causing profile anomalies and / or flatness problems.
- the cold strip edges can also adversely affect the metallurgical properties at the edge of the strip.
- this object is achieved in that the pre-strip or the band is shielded in the region of the band edges of the application of the coolant.
- a method is used, according to which the coolant is deflected in the region of the strip edges of the pre-strip or the strip, so that it does not hit the pre-band or the band in the area of the band edge.
- the coolant is deflected in the region of the strip edges to areas outside of the pre-strip or of the strip, although in principle it is also possible to divert the coolant to the center of the strip.
- the measures according to the invention are taken in the area of the inlet guide of the work rolls.
- the invention also relates to a hot rolling mill with a roughing train and a finishing train for rolling a pre-strip or a strip of a metal strand by means of work rolls and with a cooling device for applying a coolant to the pre-strip or the band.
- This is according to the invention characterized in that means for shielding the strip edges of the pre-strip, the thin slab or the strip are provided by the action ofmémitteis.
- the means are arranged in the region of side guides of the pre-strip or of the band.
- the side guides are in particular arranged in each case in front of an inlet gap formed in each case by two work rolls.
- the means for shielding the band edges are respectively attached to the side guides, in particular as separate components. They can advantageously be moved together with the side guides transversely to the web running direction of the pre-band or the band.
- the shielding means also advantageously provide for directing the coolant away from the pre-strip or belt.
- the shielding means can also be arranged in the area behind a loop lifter (looper) on the underside of the pre-strip or the band.
- 2a is a sectional view of a rolling mill passing through a metal strip in the region between two chilled beams transversely to the direction with side guides and facilities in the side region of the metal strip to shield the coolant from the edge portions of the metal strip in front of the inlet gap of two work rolls
- Fig. 2b is a plan view of the metal strip according to 2a and additionally a shielding device for shielding the coolant, which is arranged in front of the inlet side guide
- Fig. 3 is a sectional view of the metal strip and a side guide along a line III - III of Fig. 2a and in addition the cross section of the attached before the side guide shield.
- a preliminary strip and a strip 4 (FIGS. 2 a, 3) of a metal strand to be rolled pass through a pair of work rolls 6, 7 in the area in front of the work rolls 6, 7 at the side edges of the strip 4 side guides 8, 9 attached, which are approximately U-shaped in cross-section and overlap the band 4 on the top and bottom in its edge region.
- cooling bars 10, 11 cooling devices from the nozzles 12 On the top and bottom of the belt 4 are provided as cooling bars 10, 11 cooling devices from the nozzles 12, a coolant, in particular water, is sprayed under pressure on the surface of the belt 4 to cool this.
- the nozzles 12 generate on the surface of the belt 4 impact areas 13 of the coolant.
- shielding devices 14, 15 are provided which prevent cooling medium from the nozzles 12 'in the edge region of the belt 4 from being irradiated directly onto the edge region of the belt 4.
- the Ablevoriquese ⁇ 14, 15 deflect the coolant jet in each case preferably in an area laterally outside the belt 4.
- the upper-side shielding device 14 therefore comprises on both sides of the band 4 to the outside of the band 4 downwardly inclined plates 16 and 17.
- plates 18, 19 of the shielding device 15 may also be flat, relative to the plane formed by the band 4, since the coolant is already deflected downwards due to gravity.
- the shielding devices 14, 15 and 16, 18 can be attached to the guides 8, 9 as separate components, or the shielding devices 14, 15 and 16, 18 are fixed components of the guides 8, 9.
- the guides 8, 9 according to the width of the strip 4 to be rolled transversely to the direction of the tape 4 in the direction of double arrows A, B are displaced, then the shielding devices 14, 15 and 16, 18 are moved accordingly.
- the plates 18, 19 are tiltable to adjust the impact area of the shielded coolant jet.
- a shielding device 20 can also be arranged in front of the side guide 8, 9 on the underside of the belt 4, which additionally in Fig. 2b 3 is shown.
- the shielding device 20 is basically constructed like the shielding devices 14, 15 and 16, 18 and also includes like these plates 21 for deflecting the coolant flowing from nozzles 22 of a cooling bar 23.
- the invention is applicable regardless of whether the coolant flows from individual nozzles or is irradiated in the form of a curtain on the belt 4, which has a the width of the belt 4 over-extending rectangular nozzle opening.
- the coolant flows from individual nozzles or is irradiated in the form of a curtain on the belt 4, which has a the width of the belt 4 over-extending rectangular nozzle opening.
- other media such as liquid nitrogen or water-air mixtures can be used as the coolant.
- the device shown in the figures for edge shielding the band 4 can be used at various points within the finishing train especially in case of pre-strip cooling or interstage cooling. In this case, separate adjustment mechanisms for moving and adapting the shielding elements to the bandwidth can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008049537A DE102008049537A1 (en) | 2008-09-30 | 2008-09-30 | Method and apparatus for cooling a sliver or strip of a metal strand in a hot rolling mill |
PCT/EP2009/006802 WO2010037481A2 (en) | 2008-09-30 | 2009-09-21 | Method and device for cooling a leader or band of a metal strand in a hot-rolling mill |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2344287A2 true EP2344287A2 (en) | 2011-07-20 |
EP2344287B1 EP2344287B1 (en) | 2013-11-06 |
Family
ID=41719871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09778628.9A Active EP2344287B1 (en) | 2008-09-30 | 2009-09-21 | Method and device for cooling a leader or band of a metal strand in a hot-rolling mill |
Country Status (11)
Country | Link |
---|---|
US (1) | US9539629B2 (en) |
EP (1) | EP2344287B1 (en) |
JP (1) | JP5554335B2 (en) |
KR (1) | KR101279387B1 (en) |
CN (1) | CN102164688A (en) |
BR (1) | BRPI0919507A2 (en) |
CA (1) | CA2738832C (en) |
DE (1) | DE102008049537A1 (en) |
RU (1) | RU2467815C1 (en) |
UA (1) | UA98897C2 (en) |
WO (1) | WO2010037481A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009060256A1 (en) * | 2009-12-23 | 2011-06-30 | SMS Siemag AG, 40237 | Method for hot rolling a slab and hot rolling mill |
CZ305053B6 (en) * | 2013-02-22 | 2015-04-15 | Vysoké Učení Technické V Brně | Device for cooling extruded or rolled metal sections |
EP3002343A1 (en) * | 2014-09-30 | 2016-04-06 | Voestalpine Stahl GmbH | Method for the manufacture of steel strip material having different mechanical properties across the width of the strip |
DE102015223787A1 (en) * | 2015-10-09 | 2017-04-13 | Sms Group Gmbh | Method and device for producing a metallic strip by endless rolling |
DE102017206540A1 (en) * | 2017-04-18 | 2018-10-18 | Sms Group Gmbh | Apparatus and method for cooling metal strips or sheets |
DE102018211177A1 (en) * | 2018-04-13 | 2019-10-17 | Sms Group Gmbh | Cooling device for cooling a metallic material and method for its production and operation |
CN109821911A (en) * | 2019-03-19 | 2019-05-31 | 河钢股份有限公司承德分公司 | Foreplate among finishing mill |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5371661A (en) | 1976-12-09 | 1978-06-26 | Kobe Steel Ltd | Metal plate cold rolling process |
JPS5832511A (en) * | 1981-08-21 | 1983-02-25 | Nippon Kokan Kk <Nkk> | Method and device for cooling thick steel plate |
JPS5978710A (en) * | 1982-10-29 | 1984-05-07 | Kawasaki Steel Corp | Controlling method of hot rolling temperature |
DE3523483A1 (en) | 1985-07-01 | 1987-01-08 | Achenbach Buschhuetten Gmbh | ROLLER COOLING AND / OR LUBRICATION DEVICE FOR COLD-TAPE ROLLING MILLS, IN PARTICULAR FINE-TAPE ROLLING MILLS |
JPS6261713A (en) | 1985-09-09 | 1987-03-18 | Nippon Kokan Kk <Nkk> | Cooling method for hot rolling steel plate |
SU1761329A1 (en) * | 1989-01-09 | 1992-09-15 | Институт Черной Металлургии Ссср | Method of cooling hot-sheet |
JP3145144B2 (en) | 1991-09-10 | 2001-03-12 | 大日本塗料株式会社 | In-mold coating composition |
DE4134599C1 (en) | 1991-10-18 | 1993-02-25 | Thyssen Stahl Ag, 4100 Duisburg, De | |
US5235840A (en) * | 1991-12-23 | 1993-08-17 | Hot Rolling Consultants, Ltd. | Process to control scale growth and minimize roll wear |
JP2549694Y2 (en) * | 1992-02-21 | 1997-09-30 | 新日本製鐵株式会社 | Top cooling device for hot rolled material |
RU2067904C1 (en) * | 1993-02-01 | 1996-10-20 | Попыванов Геннадий Серафимович | Method for controlling cooling conditions of heated body |
RU2067901C1 (en) * | 1993-05-18 | 1996-10-20 | Новолипецкий металлургический комбинат | Strip hot rolling method |
DE19850738A1 (en) * | 1998-11-04 | 2000-05-11 | Schloemann Siemag Ag | Operating method for a roll stand of a rolling mill |
DE19925535A1 (en) * | 1999-06-04 | 2000-12-07 | Sms Demag Ag | Adjustment method for two shielding elements arranged over a metal band and corresponding adjustment device |
DE19943288A1 (en) * | 1999-09-10 | 2001-03-15 | Sms Demag Ag | Adjustment procedure for two shielding elements and associated roller table |
DE10131369A1 (en) * | 2001-06-28 | 2003-01-09 | Sms Demag Ag | Method and device for cooling and lubricating rolls of a roll stand |
KR100780503B1 (en) | 2003-06-13 | 2007-11-29 | 제이에프이 스틸 가부시키가이샤 | Controllable cooling method for thick steel plate and cooling device for the thick steel plate |
RU38453U1 (en) * | 2004-04-01 | 2004-06-20 | Костенко Валентина Александровна | SHEET COOLING COOLING SYSTEM AT A WIDELINE HOT ROLLING PLANT |
KR100668698B1 (en) | 2005-11-08 | 2007-01-16 | 주식회사 포스코 | Apparatus and method supplying lubricant in endless hot rolling equipment |
-
2008
- 2008-09-30 DE DE102008049537A patent/DE102008049537A1/en not_active Withdrawn
-
2009
- 2009-09-21 EP EP09778628.9A patent/EP2344287B1/en active Active
- 2009-09-21 JP JP2011528225A patent/JP5554335B2/en not_active Expired - Fee Related
- 2009-09-21 US US13/121,773 patent/US9539629B2/en active Active
- 2009-09-21 CA CA2738832A patent/CA2738832C/en not_active Expired - Fee Related
- 2009-09-21 BR BRPI0919507A patent/BRPI0919507A2/en not_active IP Right Cessation
- 2009-09-21 UA UAA201105544A patent/UA98897C2/en unknown
- 2009-09-21 RU RU2011117232/02A patent/RU2467815C1/en active
- 2009-09-21 WO PCT/EP2009/006802 patent/WO2010037481A2/en active Application Filing
- 2009-09-21 KR KR1020117006394A patent/KR101279387B1/en active IP Right Grant
- 2009-09-21 CN CN2009801390967A patent/CN102164688A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2010037481A2 * |
Also Published As
Publication number | Publication date |
---|---|
CA2738832C (en) | 2013-11-05 |
KR101279387B1 (en) | 2013-07-04 |
US9539629B2 (en) | 2017-01-10 |
UA98897C2 (en) | 2012-06-25 |
JP2012504052A (en) | 2012-02-16 |
KR20110044317A (en) | 2011-04-28 |
JP5554335B2 (en) | 2014-07-23 |
EP2344287B1 (en) | 2013-11-06 |
CA2738832A1 (en) | 2010-04-08 |
WO2010037481A3 (en) | 2010-07-15 |
BRPI0919507A2 (en) | 2018-02-14 |
US20110209515A1 (en) | 2011-09-01 |
DE102008049537A1 (en) | 2010-04-01 |
RU2467815C1 (en) | 2012-11-27 |
CN102164688A (en) | 2011-08-24 |
WO2010037481A2 (en) | 2010-04-08 |
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