EP3969194A1 - Warmwalzen mit flexibler konfiguration der walzgerüste - Google Patents
Warmwalzen mit flexibler konfiguration der walzgerüsteInfo
- Publication number
- EP3969194A1 EP3969194A1 EP20725630.6A EP20725630A EP3969194A1 EP 3969194 A1 EP3969194 A1 EP 3969194A1 EP 20725630 A EP20725630 A EP 20725630A EP 3969194 A1 EP3969194 A1 EP 3969194A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stand
- roll
- rolls
- stands
- hot rolling
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
-
- 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
- B21B2001/225—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 by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/025—Quarto, four-high stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/028—Sixto, six-high stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/02—Roll dimensions
- B21B2267/06—Roll diameter
Definitions
- the present invention is based on an Radiostyren for a hot rolling mill, which has at least a first and a last roll stand,
- the present invention is further based on a hot rolling mill which has at least a first and a last rolling stand, so that sections of metal strips rolled in the hot rolling mill first pass through the first and only then after the last rolling stand, the first rolling stand as Four-high stand is configured with work rolls and backup rolls.
- finishing lines for rolling metal strips are usually operated in this manner and Wei se and finishing lines for rolling metal strips (especially made of steel) are usually so.
- the last roll stand (and, as a rule, the other roll stands of the finishing train as well) are retooled in order to remove worn work rolls and possibly also to replace worn back-up rolls.
- the configuration of the roll stands is not changed. There is only a 1: 1 exchange of pairs of rollers.
- the rolling stands of hot rolling mills are usually equipped with so-called four-high stands.
- Four-high stands are roll stands that, in addition to the work rolls, have back-up rolls on which the work rolls are supported. In the English-speaking world, such roll stands are often referred to as 4-high.
- the problem is solved in that working rollers with the smallest possible diameter are used.
- the smaller the diameter of the work rolls the lower the torque with which the work rolls can be driven without the risk of breaking the roll zappens.
- the torque is higher with harder materials.
- the diameter of the work rolls should be as small as possible in order to be able to achieve the smallest possible final thickness, but on the other hand it must not be too small, since otherwise the required torque cannot be transmitted.
- roll stands which have a large number of rolls, for example so-called 12-roll roll stands or 20-roll roll stands. Such rolling stands cannot be used for hot rolling because they take up too much space and do not allow adequate cooling of the rolls - especially the work rolls.
- JP 63 013 603 A it is known to design a roll stand so that it can be converted so that it can be configured as a four-high stand or as a six-high stand as required.
- the object of the present invention is to create possibilites to be able to produce materials with higher strength with low final thicknesses in a hot rolling mill.
- an operating method of the type mentioned above is designed in that, as part of the retrofitting of the last roll stand, the last roll stand is converted between the rolling of the first metal strip and the rolling of the second metal strip from a four-high stand to a six-high stand or vice versa, so that the The last roll stand during the rolling of the first metal strip is configured as a four-high stand with work rolls and backup rolls and is configured as a six-high stand with work rolls, intermediate rolls and backup rolls during the rolling of the second metal strip.
- the rolling plan i.e. the sequence of the metal strips to be rolled one after the other
- the last roll stand is retooled at a point in time when the work rolls are being dismantled due to the wear and tear of the work rolls currently in the last roll stand would have to.
- This approach leads to optimized productivity.
- the conversion can also be carried out independently of the state of wear of the work rolls and thus independent of the wear and tear of the work rolls (in the case of a four-high stand) or the work rolls and, if necessary, the back-up rolls (in the case of a six-high stand).
- the sum of the diameters of working rolls and intermediate rolls of the six-high stand configured as The last roll stand is at least approximately - usually accurate to 20%, better to 10% - the diameter of the work rolls of the last roll stand configured as a four-high stand.
- the adjustment range of the last roll stand can be optimally used both in the configuration as a four-high stand and in the configuration as a six-high stand.
- the work rolls and the intermediate rolls of the last roll stand configured as a six-high stand are installed or removed as a unit. This allows the conversion to take place particularly quickly.
- the first roll stand is preferably configured as a four-high stand both during the rolling of the first metal strip and during the rolling of the second metal strip. As a result, the construction of the first roll stand remains simple.
- the metal strips are preferably cast in a continuous caster arranged upstream of the first roll stand and fed to the first roll stand from the casting heat.
- the operation of the hot rolling mill can be optimized in terms of energy.
- the hot rolling mill is preferably operated in endless operation. Thereby, the productivity of the hot rolling mill can be maximized.
- the hot rolling mill only has the first and the last roll stand, i.e. a total of two roll stands. Often, however, the hot rolling mill has a number of further roll stands between the first and the last roll stands, for example two further roll stands, three further roll stands or four further roll stands, so that - including the first roll stand and the last roll stand - a total of four, five or six roll stands available.
- the other roll stands While the first metal strip is being rolled, the other roll stands are configured as four-high stands.
- the other roll stands can be configured either as four-high stands or as six-high stands. In the sequence of the roll stands ge see - so from the first roll stand to the second roll stand, on to the third roll stand, etc.
- a hot rolling mill of the type mentioned above is designed in such a way that the last roll stand - at least temporarily - is configured as a six-high stand with work rolls, intermediate rolls and backup rolls.
- the work rolls and the intermediate rolls of the last roll stand configured as a six-high stand are preferably arranged in a cassette which can be installed and removed as a unit. As a result, both a change of the work rolls and the intermediate rolls due to wear as well as a conversion from a four-high stand to a six-high stand or vice versa can take place particularly quickly.
- a continuous caster is preferably arranged upstream of the first roll stand, in which the metal strips are in the Hot rolling train are cast, so that the metal strips can be fed to the first roll stand from the casting heat.
- the hot rolling mill can be operated in endless operation. Thereby, the productivity of the hot rolling mill can be maximized.
- the hot rolling mill has a number of further roll stands between the first and the last roll stand.
- the further roll stands can be configured as four-high stands or as six-high stands. Viewed in the sequence of the roll stands - that is, from the first to the second roll stand, etc. - there is preferably only one change from a four-high stand to a six-high stand.
- FIG. 2 shows the hot rolling train of FIG. 1 during the rolling of a second metal strip
- FIG. 6 shows a modification of the hot rolling mill from FIG. 1. Description of the embodiments
- a hot rolling train has several roll stands la to ld.
- the hot rolling train can in particular be designed as a finishing train.
- FIG. 1 there are four roll stands la to ld.
- the number of roll stands la to ld could, however, also be greater, for example five, six or seven. It could alternatively be smaller, for example two or three. At least two roll stands la to ld are present. If there are more than two roll stands la to ld, a number of further roll stands lb, lc are arranged between the first roll stand la and the last roll stand ld.
- a first metal strip 2 is hot-rolled in the hot rolling mill.
- the first metal strip 2 can in particular be a steel strip.
- the first metal strip 2 runs through the hot rolling mill without stopping and without reversing the direction in a transport direction x.
- the individual sections from the first metal strip 2 thus first pass through the first roll stand la, then the second roll stand lb, then the third roll stand lc and finally the last roll stand ld.
- the first metal strip 2 Before rolling in the first roll stand la, the first metal strip 2 can be heated to the required rolling temperature, for example in an oven (not shown).
- the rolling temperature for a steel strip is usually between 900 ° C and 1200 ° C.
- the first metal strip 2 can be reeled into a coil (not shown), for example.
- all roll stands la to ld of the hot rolling mill are configured as four-high stands.
- the roll stands la to ld thus each have work rolls 3 and backup rolls 4, but no further rolls.
- 2 shows the same hot rolling mill with the same rolling frames la to ld during the rolling of a second metal strip 5.
- the first rolling frame la is still configured as a four-high stand at this point in time, i.e. during the rolling of the second metal strip 5 .
- At least the last roll stand 1d is configured as a sex stand. It therefore has 4 work rolls 6 and intermediate rolls 7 in addition to the support rolls.
- the inter mediate rollers 7 are between the backup rollers 4 and the Ar beitswalzen 6 arranged.
- the further roll stands lb, lc can be configured according to the Dar position in FIG 2 during the rolling of the second Metallban of 5 either as four-high stands or as six-high stands. Regardless of which of the further roll stands lb, lc are configured as four-high stands and which of the further roll stands lb, lc are configured as six-high stands, a four-high stand is changed only once in the sequence of roll stands la to ld to a sexto framework. In the specific design of the rolling train according to the illustration in FIGS. 1 and 2 with a total of four roll stands la to ld, it is possible, please include that both further roll stands lb, lc are configured as four-high stands.
- both further roll stands lb, lc are configured as six-high stands. If, however, one of the two further roll stands lb, lc is configured as a quarto stand and the other of the two further roll stands lb, lc is configured as a six-high stand, then the further roll stand lb - that is, the roll stand adjoining the first roll stand la - is configured as a four-high stand and the further roll stand lc - that is, the roll stand adjoining the last roll stand ld - as a six-high stand.
- the work rolls 3 are usually driven.
- the work rolls 6 are also usually driven.
- the intermediate rollers 7 can also be driven. In the case of the respective configuration, these statements also apply to the last roll stand 1d of the hot rolling mill.
- first the first metal strip 2 is rolled in the hot rolling mill and only then is the second metal strip 5 rolled. In principle, however, the reverse procedure is also possible.
- At least the last roll stand 1d (and possibly also at least one of the further roll stands) is between the rolling of the first metal strip 2 and the rolling of the second metal strip 5 lb, lc) converted from a four-high stand to a six-high stand.
- the work rolls 3 of the four-high stand are removed.
- the dismantling takes place in the axial direction of the work rolls 3 through the window of the service-side stand.
- the dismantled work rolls 3 are shown in dashed lines.
- the work rolls 6 and the abnormalwal zen 7 of the six-high stand are installed as shown in FIG.
- the installation takes place, as is generally customary in the approach and indicated in FIG. 4 by an arrow B, in the axial direction of the work rolls 6 and the intermediate rolls 7 through the window of the service-side stand.
- the last roll stand ld is configured either as a four-high stand - see left in FIG. 5 - or as a six-high stand - see right in FIG. 5 - configured.
- the backup rolls 4 are not changed when the last roll stand 1d is converted.
- the backup rolls 4 are so both in the configuration of the last roll stand 1d as a four-high stand and in the configuration of the last roll stand 1d as a six-high stand, the same backup rolls 4.
- the work rolls 6 and the intermediate rolls 7 of the six-high stand are preferably arranged in a cassette 8 as shown in FIG. This makes it possible to install the cassette 8 as such, so as a unit.
- the working rolls 6 and the intermediate rolls 7 of the six-high stand can also be used as a unit, i.e. especially simultaneously.
- the diameter D should , D 'and D "of the work rolls 3, the work rolls 6 and the intermediate rolls 7 preferably be matched to one another in such a way that the sum of the diameters D', D" of the work rolls 6 and the intermediate rolls 7 of the six-high stand dem
- Diameter of the work rolls 3 of the four-high stand corresponds at least approximately. Smaller deviations of a maximum of 20%, better of a maximum of 10%, can be tolerated.
- the diameter D ', D "of the work rolls 6 and the intermediate rolls 7 in the configuration of the last roll stand 1d as a six-high stand should also be determined taking into account whether the work rolls 6 or the intermediate rolls 7 are driven the diameter D 'of the work rolls 6 must be as large as the diameter D "of the intermediate rolls 7, possibly even greater than the diameter D" of the intermediate rolls 7.
- the diameter D' of the work rolls 6 is preferably significantly smaller than the diameter D "of the intermediate rolls 7.
- the diameter D ′ of the work rolls 6 can be between 50% and 70% of the diameter D" of the intermediate rolls 7.
- the hot rolling mill can have a continuous caster 9.
- the continuous caster 9 is arranged upstream of the first roll stand la.
- the metal strips 2, 5 are cast before rolling in the hot rolling road. It is therefore possible to feed the metal strips 2, 5 to the first roll stand la from the casting heat.
- the hot rolling mill has been expanded to form a composite casting and rolling plant. Due to the presence of the continuous caster 9, it is particularly possible to run the hot rolling road in endless operation. Alternatively, batch operation is also possible.
- the hot rolling mill - as an alternative or in addition to the continuous caster 9 - has a furnace (not shown in the figures). The furnace, if it is available, is arranged upstream of the first roll stand la. If necessary, the first roll stand la can also be upstream roll stands 10 vorgeord net, in particular roughing stands of a roughing train.
- the pre-arranged roll stands 10 are, if they exist, the continuous caster 9 and / or the furnace downstream.
- FIG. 6 shows a state in which the roll stands la to ld are all configured as four-high stands.
- the continuous caster 9 and possibly also the upstream roll stands 10 are also present when the last roll stand ld and possibly also at least one of the further roll stands lb, lc is or are configured as a six-high stand.
- Further configurations of the roll stands la to ld can be as required.
- the work rolls 3, 6 can be axially displaced.
- the intermediate rolls 7 can also be displaceable as an alternative or in addition to the work rolls 6.
- the bending of the work rolls 3, 6 and possibly also the intermediate rolls 7 can also be the same as in the prior art.
- the work rolls 3 can be arranged slightly offset with respect to the support rolls 4.
- the work rolls 6 can be arranged slightly offset relative to the intermediate rolls 7 in the transport direction x of the metal strips 2, 5.
- the intermediate rolls 7 can be arranged slightly offset with respect to the support rolls 4.
- the offset of the work rolls 6 relative to the intermediate rolls 7 and the offset of the intermediate rolls 7 relative to the backup rolls 4 are preferably in the same direction. If necessary, any shear forces can be absorbed by support rollers.
- the support rollers are, if they are present, einlaufseifig and / or Auslaufseifig of the Ar beitswalzen 6 arranged. If possible, however, such support rollers should be avoided.
- the work rolls 3, 6 are generally cooled both in the configuration as a four-high stand and in the configuration as a six-high stand.
- Appropriate cooling beams are available for cooling.
- the cooling beams can optionally be arranged on the cassette 8 on the running side and / or on the running side.
- the cooling beams can be a component of the last roll stand ld as such, so that they can be used when the configuration is changed over the last roll stand is not installed and removed.
- the present invention has many advantages.
- metal strips 2, 5 made of softer materials but also metal strips 2, 5 made of harder materials can be rolled to small final thicknesses.
- a subsequent cold rolling can be dispensed with or can begin with a thinner input product, which in turn means that the output product of the cold rolling can have a smaller thickness.
- the product range that can be manufactured is not impaired, and is often even expanded.
- the necessary flexural rigidity during rolling can be achieved by configuring the last roll stand 1d as a four-high stand.
- the pass decrease in the last roll stand 1d can be maximized in the configuration as a six-high stand, although the rolling forces and rolling torques required for this can be reduced.
- improved material properties of the second metal strip 5 can also be achieved at the same time.
- the microstructure of the second metal strip 5 can be homogenized and so-called shear strips can be prevented.
- ferritic rolling is possible in the hot rolling train.
- the so-called r-value which characterizes the planar anisotropy and is important for the deep-drawability of the rolled metal strips 2, 5, can be positively influenced. In the prior art, this requires cold rolling with subsequent annealing. With the present invention, cold rolling and annealing can be eliminated.
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 |
|---|---|---|---|
| ATA50442/2019A AT522073B1 (de) | 2019-05-16 | 2019-05-16 | Warmwalzen mit flexibler Konfiguration der Walzgerüste |
| PCT/EP2020/061706 WO2020229159A1 (de) | 2019-05-16 | 2020-04-28 | Warmwalzen mit flexibler konfiguration der walzgerüste |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3969194A1 true EP3969194A1 (de) | 2022-03-23 |
| EP3969194C0 EP3969194C0 (de) | 2024-07-24 |
| EP3969194B1 EP3969194B1 (de) | 2024-07-24 |
Family
ID=70682810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20725630.6A Active EP3969194B1 (de) | 2019-05-16 | 2020-04-28 | Warmwalzen mit flexibler konfiguration der walzgerüste |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3969194B1 (de) |
| CN (1) | CN113811402B (de) |
| AT (1) | AT522073B1 (de) |
| WO (1) | WO2020229159A1 (de) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2039959A (en) * | 1933-12-28 | 1936-05-05 | Mesta Machine Co | Rolling mill |
| GB665186A (en) * | 1949-06-09 | 1952-01-16 | Samuel Fox And Company Ltd | Improvements in rolling mills |
| BR8300010A (pt) * | 1982-01-06 | 1983-08-30 | Hitachi Ltd | Laminador |
| JPS6313603A (ja) | 1986-07-04 | 1988-01-20 | Hitachi Ltd | 圧延機 |
| DE3707560A1 (de) * | 1987-03-10 | 1988-09-22 | Schloemann Siemag Ag | Walzgeruest |
| DE10046426A1 (de) * | 2000-09-20 | 2002-03-28 | Sms Demag Ag | Kombinierter Antrieb für ein Vierwalzen- bzw. Sechswalzengerüst sowie Betriebsverfahren hierfür |
| JP4118681B2 (ja) * | 2000-12-13 | 2008-07-16 | 株式会社日立製作所 | ロール組み替え設備及びロール組み替え方法 |
| FR2846579B1 (fr) | 2002-11-05 | 2006-05-05 | Vai Clecim | Procede pour elargir la gamme de production d'une installation de laminage de produits metalliques et installation pour la mise en oeuvre du procede |
| FR2851942B1 (fr) | 2003-03-05 | 2006-04-28 | Procede de changement de configuration d'un laminoir et laminoir perfectionne pour la mise en oeuvre du procede | |
| DE102009037278A1 (de) * | 2009-08-12 | 2011-02-17 | Sms Siemag Ag | Vorrichtung und Verfahren zum Herstellen eines dünnen Warmbandes |
| DE102010014346A1 (de) * | 2010-04-09 | 2011-10-13 | Sms Siemag Ag | Verfahren zum fliegenden Arbeitswalzenwechsel in Gießwalzanlagen und Warmbandstraßen |
| CN102303045B (zh) * | 2011-09-22 | 2013-05-29 | 燕山大学 | 四六辊互换轧机 |
| CN202290723U (zh) * | 2011-09-22 | 2012-07-04 | 燕山大学 | 四六辊互换轧机 |
| IT201700028768A1 (it) * | 2017-03-15 | 2018-09-15 | Danieli Off Mecc | Impianto combinato di colata continua e laminazione di nastri metallici a caldo |
-
2019
- 2019-05-16 AT ATA50442/2019A patent/AT522073B1/de active
-
2020
- 2020-04-28 WO PCT/EP2020/061706 patent/WO2020229159A1/de not_active Ceased
- 2020-04-28 EP EP20725630.6A patent/EP3969194B1/de active Active
- 2020-04-28 CN CN202080036464.1A patent/CN113811402B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3969194C0 (de) | 2024-07-24 |
| AT522073B1 (de) | 2020-08-15 |
| CN113811402B (zh) | 2024-03-12 |
| EP3969194B1 (de) | 2024-07-24 |
| WO2020229159A1 (de) | 2020-11-19 |
| CN113811402A (zh) | 2021-12-17 |
| AT522073A4 (de) | 2020-08-15 |
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