CN102740989A - Hot rolling train for rolling hot-rolled strip, method for operating a hot rolling train for rolling hot-rolled strip, and control/adjustment device - Google Patents
Hot rolling train for rolling hot-rolled strip, method for operating a hot rolling train for rolling hot-rolled strip, and control/adjustment device Download PDFInfo
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- CN102740989A CN102740989A CN2010800631225A CN201080063122A CN102740989A CN 102740989 A CN102740989 A CN 102740989A CN 2010800631225 A CN2010800631225 A CN 2010800631225A CN 201080063122 A CN201080063122 A CN 201080063122A CN 102740989 A CN102740989 A CN 102740989A
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
- C21D9/5737—Rolls; Drums; Roll arrangements
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
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- 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a method for operating a hot rolling train (1) for rolling hot-rolled strip, to a control/adjustment device for carrying out the method, and to a hot rolling mill (1) for rolling hot-rolled strip (B), comprising a cooling section (4) for cooling the hot-rolled strip (B). By installing at least one strip driving device (7, 8, 9), by means of which a tensile stress of the hot-rolled strip (B) can be adjusted, in the mass flow direction after the start of the cooling section (4) and in the mass flow direction before the end of the cooling section (4), a hot rolling mill can be provided by means of which the quality of the hot-rolled strip that is produced can be improved.
Description
Technical field
The present invention relates to a kind of hot-rolling mill that is used for the rolling hot-rolling band, comprise the cooling end section that is used for cooling hot-rolled band.In addition; The present invention relates to a kind of method of operating that is used for the hot-rolling mill of rolling hot-rolling band; Wherein come the rolling hot-rolling band by means of at least one mill stand, the band that wherein is rolled passes the cooling end section, and wherein the hot-rolled band by means of the cooling of cooling end section is wrapped on the capstan winch.In addition, the invention still further relates to a kind of control and/or adjusting device that is used for hot-rolling mill.
This patent application relates to the hot rolling technology technical field.In course of hot rolling; Particularly in the course of hot rolling of sheet metal strip; Can produce solid metal spare, the for example steel ingot of processing by liquid metal by means of casting method arbitrarily; It is processed to the hot-rolled band product through reprocessing, particularly hot rolling and cooling, is wound in hot-rolled strip steel winding in the hot-rolling mill end.Through this course of hot rolling, confirmed the physical dimension and the material behavior thereof of hot-rolled band basically.
The temperature of sheet metal strip can change in course of hot rolling to some extent; And can in the capstan winch zone, reach about 500 ℃ to 600 ℃; Be so-called capstan winch temperature, the temperature that is positioned at the hot-rolling mill zone in capstan winch the place ahead in the hot-rolling mill end, along the Flow of Goods and Materials direction reaches about 1300 ℃ to 1400 ℃.
Background technology
The grade of modern material quality, particularly steel draws through perfect process for cooling.Institutional framework depends on suitable cooling procedure.The example of this cooling means of hot-rolled band is announced in for example EP 1244816-B1 and DE 10129565 B4.Make in this way, can carry out high-precision adjusting to material behavior with the mode of expectation.
But the glitch in the cooling procedure just might cause the structure of hot-rolled band seriously inhomogeneous.The fluctuation of yield strength is relevant with this structural inhomogeneity, and subsequently the hot-rolled band of producing is being carried out also can causing when cold rolling the thickness mistake that almost can't control.Along with in the hot-rolled band every meter appear at the inhomogeneous or construction error of structure in the material structure more than the frequency of a structure failure; Inhomogeneous or the construction error of this structure is being fit under the mill speed of producing, can't be controlled by means of the regulating element that can buy from market again in cold-rolling mill.This structure failure in the initiation region of band, also claim to take the lead the stub area of zone and band, also claim in the magnetic tape trailer zone more serious.
The consequence that this structure failure causes be exactly needle-like can appear in cold-rolled process mostly, be long and narrow but thickness deviation that numerical value is bigger on the space, it exceeds the thickness deviation of permission.Must before reprocessing, in an extra step, these band defective zones be rejected.Therefore, this type of mistake increases the sheet metal strip processing charges, and the waste material ratio that increases reduces productivity ratio.
Summary of the invention
The objective of the invention is to, improve the quality of production of hot-rolled band, particularly reduce with pin and/or take the lead the structural inhomogeneity of hot-rolled band in the zone.
This purpose realizes through the hot-rolling mill that this paper starts said type; Simultaneously; After the starting point of cooling end section and along the Flow of Goods and Materials direction, before the terminal point of cooling end section, arrange at least one band drive unit along the Flow of Goods and Materials direction; By means of this band drive unit, can regulate the tension of hot-rolled band, particularly non-vanishing tension.Replace this notion of band drive unit, can also use band to influence this notion of device.To with such device importantly, by means of this device tension is carried on the band.
The band drive unit is meant that each can make tension, promptly the stress along the sheet metal strip transporting direction is carried in the device on the band.
The inventor recognizes, takes the lead the no state of tension of the regional structural inhomogeneity of zone and magnetic tape trailer when passing the cooling end section.Can cause the band out-of-flatness because when hot-rolled band penetrates and/or pass, lack tension, this out-of-flatness situation can be aggravated in the cooling procedure of cooling end section, thereby makes sheet metal strip become uneven, causes the inhomogeneous deflection of cooling water.So the water of cooling end section for example can accumulate in the recess of band, on the contrary, water can flow away rapidly from the projection of band.The inhomogeneous cooling that causes thus is even can to cause the said structure inhomogeneities.Can reduce structural inhomogeneity thus, promptly penetrate in the process to zone and apply pulling force according to the cooling end Duan Zhongwu tension of prior art at band.This can realize through hot-rolling mill of the present invention; Between the terminal point of the starting point of cooling end section and cooling end section, arrange at least one band drive unit, can tension be carried on band zone hot-rolled band, that pass the cooling end section by means of this device.The terminal point of the starting point of cooling end section and cooling end section is that the Flow of Goods and Materials direction with reference to rolling mill defines.That is to say that the position that band gets into the cooling end section is the starting point of cooling end section; The position that band skids off the cooling end section is the terminal point of cooling end section.
Because of the defective band length of structural inhomogeneity depends on, action of pulling stress moves on which section of for example taking the lead before on the band in the cooling end section.
In traditional hot-rolling mill, the device that can set up tension normally mm finishing mill unit last mill stand be arranged in any sets of capstan winch the place ahead.The cooling end section is positioned between these two devices, in fact depends on the type of hot-rolling mill, and the cooling end section can reach hundreds of rice at most.
Therefore, band of the prior art is penetrating last mill stand and the section between the sets in capstan winch the place ahead, promptly also particularly during the cooling end section, is being in no state of tension.
Situation when passing is similar.In case the band pin passes from last mill stand, just no longer be in tension state to the band part the sets before next-door neighbour's capstan winch from the band pin.Therefore just can under no state of tension, these parts to band cool off.
The effective length of the band part that under no state of tension, is cooled; Promptly taking the lead and in all under no tensile stress state, the wear long band part of supercooling portion section of magnetic tape trailer; Can reduce effectively through hot-rolling mill according to the present invention, thereby can make a large amount of bands avoid the aforesaid former structural inhomogeneity that pre-exists.Thickness mistake in the time of can avoiding cold rolling to a great extent thus, thus also can significantly reduce the steel scrap output that causes by the thickness mistake.
In a kind of favourable embodiment, be provided with a plurality of band drive units according to hot-rolling mill of the present invention.They are arranged between the terminal point of starting point and cooling end section of cooling end section.Because can set up the band zone that maximum spacing between two devices of tension determined under no tensile stress state, to pass the cooling end section (not only comprised take the lead but also comprise magnetic tape trailer), so advantageously through using a plurality of band drive units to shorten this spacing.Through between the starting point of cooling end section and terminal point, a plurality of band drive units being set, can realize this shortening.Because the band drive unit that is provided with is many more, and the maximum spacing between two adjacent tapes drive units is more little, and then under no tensile stress state, to pass the part of cooling end section just few more for band.Therefore, correspondingly use a plurality of band drive units can reduce the band part of under no tension, passing the cooling end section like this, promptly make this part compare and be similar to and ignore with the entire length of hot-rolled band.
A kind of preferred embodiment in, the spacing between two adjacent band drive units is greater than 10 meters and less than 70 meters, particularly greater than 20 meters and less than 50 meters.It is favourable that this arrangement is described below, and the band part of promptly under no action of pulling stress, passing the cooling end section on the one hand obviously reduces.On the other hand, the quantity of required here band drive unit is not many to must a large amount of, the band drive unit more than ten especially being set at this yet, and they can reduce the band pin when cold rolling regional and take the lead thickness mistake in the zone.Adopt above-mentioned spacing can realize good effect, and can for the hot-rolling mill operating personnel, limit technological input, particularly improve the expense of band drive unit.
In the favourable embodiment of another kind, the cooling end section has at least two cooling sections spaced apart from each other along the Flow of Goods and Materials direction, wherein between cooling section, is furnished with the band drive unit.Its advantage is that cooling end Duan Buhui continues to band drive unit water spray, and therefore possibly not shorten its service life.
Just as what favourable embodiment was supposed to be on the other hand, be arranged in the starting point of cooling end section and the band drive unit between the terminal point by from the coolant cools of cooling end section, particularly constantly the cooling.Because can guarantee that like this each band drive unit can be not overheated when regulating tension.Because what need consideration is that the hot-rolled band in the cooling end section depends on that the position in the cooling end section has the temperature of the load of tangible expression band drive unit.
In the another kind of favourable embodiment of the present invention, the cooling end section has a plurality of cooling sections spaced apart from each other along the Flow of Goods and Materials direction, wherein between all adjacent respectively cooling sections, is furnished with the band drive unit.The structural inhomogeneity of hot-rolled band is realized reducing in advantageous particularly ground thus.
Same particularly advantageously be, along the Flow of Goods and Materials direction before the cooling end section and/or arrange the band drive unit that at least one is other afterwards.Particularly advantageously be; Before starting point, arrange the band drive unit near the cooling end section; And after the terminal point near the cooling end section, arrange the band drive unit, wherein each band drive unit can make tension be carried on the band through the band drive unit.
The advantage of the band drive unit of arranging before the Flow of Goods and Materials direction next-door neighbour cooling end section is; When hot-rolled band passes from hot-rolling mill; Particularly when magnetic tape trailer has left last mill stand of hot-rolling mill, can also in whole cooling end section, continue as band and keep tension.That is to say that tension can keep always, the band drive unit of before magnetic tape trailer is through next-door neighbour's cooling end section, arranging.
The advantage of the band drive unit of after Flow of Goods and Materials direction next-door neighbour cooling end section, arranging is when hot-rolled band penetrates in advance, although band possibly also not reach capstan winch, in whole cooling end section, also to form tension.So, can make band, because under no tension, pass the cooling end section and the uneven part of structure is significantly reduced.
Advantageously, at least one band drive unit comprises one group of driven roller.Preferably, all strips drive unit is designed to one group of driven roller with attached drive unit respectively.Most suitable with driven roller as the band drive unit because they can not take very big space, and can be arranged in simply between the cooling section adjacent in the cooling end section for example.Sets is fit to tension is applied on the band very much.
Realize through the method that this paper starts described type according to the part that relates to method in the object of the invention; Wherein, At least in the time of between last mill stand when the free end of hot-rolled band is arranged in the cooling end section at capstan winch with on the Flow of Goods and Materials direction before; Operation is when having at least an end unoccupied like this; Like this operation at least one be arranged in the starting point of cooling end section and the band drive unit between the terminal point, promptly by means of this band drive unit can make tension be carried in hot-rolled band, pass the cooling end section that part of on.The above-mentioned advantage that relates to the solution of device is applicable to the part that relates to method similarly.
In a kind of favourable embodiment; Between the terminal point of the starting point of cooling end section and cooling end section, arrange a plurality of band drive units, wherein, after taking the lead through the first band drive unit; When band penetrates rolling mill; Make the engagement of the first band drive unit and band, and taking the lead, make the first band drive unit and band remove engagement through behind the second band drive unit of Flow of Goods and Materials direction.Like this, can simply and possibly there be when penetrating, to realize by error adjusting to pulling force.
Particularly advantageous is that when the second band drive unit and band engagement, the first band drive unit is removed engagement.Its advantage does, tension (except from the first band drive unit to the transmission time of the second band drive unit) only be to provide basically by a band drive unit always.The dynamic loads of the band drive unit of adjustment distributes to have avoided when additional band drive unit and band engagement, needing at any time thus.This need have very big input at technical elements, and can cause higher error rate.Use that said method is especially avoidable to be, because the load deviation of not expecting of the first and second band drive units, and between the first and second band drive units, produce the no pulling force zone of not expecting in the cooling procedure.In order to ensure avoiding or reducing this phenomenon, must propose once more that the cooling end section is carried out pulling force and regulate, and use said method can omit this step.
Realized the function of band driver then being regarded as " being in engagement " when the band drive unit, that is to say, can also set up tension for band." entering engagement " is meant a process, and the band drive unit has not the original state with band " engagement " in this process, and this state is carried out the transition to the end-state that " is in engagement " with band.This is applicable to " non-engagement state " or with the expression way of band drive unit " remove engagement " similarly.
Particularly advantageous is to move the first band drive unit and the second band drive unit like this, even the first and second band drive units mesh with band in the limited time period at least simultaneously.This sets up state in tension and is handed in the process on the second band drive unit by the first band drive unit and have very important significance.Because can set up the tension that state handed in the process on the second band drive unit expectation by the first band drive unit in tension like this maintains; That is to say; Setting up state in tension and handed in the process on the second band drive unit by the first band drive unit, is not have pulling force in the band.
A kind of preferred version does; The first band drive unit is like this removed engagement with band and is made the second band drive unit and band meshes; Promptly setting up state in tension is handed to by the first band drive unit in the process in the driving of second band; The tension of band in band zone that before delivering beginning, just has been in tension state by means of the first band drive unit is numerically all the time greater than 0, but is preferably more than predetermined threshold value.Particularly advantageously be that the tension in band zone that is in tension state by means of the first band drive unit is invariable in delivering process.Through the aforesaid operations method, it is inhomogeneous when band penetrates or pass hot-rolling mill, to reduce or stop the structure that produces because of operation band drive unit as much as possible, and structural inhomogeneity is limited on the least possible band part.
In the another kind of embodiment of the method for the invention; Between the terminal point of the starting point of cooling end section and cooling end section, arrange a plurality of band drive units; Wherein when band passes hot-rolling mill, through before this first band drive unit, make the engagement of the first band drive unit and band at magnetic tape trailer; And before magnetic tape trailer is through the first band drive unit, makes along the Flow of Goods and Materials direction and follow the second band drive unit and band engagement in the back.Can when band passes, its structural inhomogeneity be remained on the alap level thus.
Preferably, the band drive unit of at least one, particularly a plurality of band drive units are removed engagement with band during hot-rolling mill stable operation.During hot-rolling mill stable operation; Just do not having defective basically and do not comprising that band penetrates and passes in the running of hot-rolling mill; Needn't move at least one band drive unit, because in this case, according to traditional approach; Band is in tension state in the cooling end section, and can not cause occurring structural inhomogeneity because of lacking web stress in the cooling end section usually.
The invention still further relates to a kind of data medium according to claim 15; It has and is used to control and/or the machine-readable program coding of adjusting device, and wherein program coding is comprising the control command that can make control and/or adjusting device enforcement of rights require each said method in 8 to 14.
In addition; The invention still further relates to a kind of control and/or adjusting device and machine-readable program coding of being used for as claimed in claim 15, wherein program coding is comprising the control command that can make control and/or adjusting device enforcement of rights require each said method in 8 to 14.
The present invention is applicable to the hot-rolling mill of unidirectional heat milling train and reversible working simultaneously.
Description of drawings
Other advantage of the present invention is provided by the following embodiment that specifies more according to sketch map.It illustrates:
Fig. 1 shows the sectional schematic diagram of hot-rolling mill in the first embodiment of the invention,
Fig. 2 shows the sectional schematic diagram of hot-rolling mill in the second embodiment of the invention,
Fig. 3 shows the flow chart of the embodiment when penetrating according to the method for the invention,
Fig. 4 shows the flow chart of the embodiment when passing according to the method for the invention.
The specific embodiment
Fig. 1 shows the sketch map of hot-rolling mill 1, can produce hot metallic strip B by means of hot-rolling mill.The hot rolling part for example by unshowned pouring device, is transferred to hot-rolling mill 1.Replacedly, it is rolling also can the steel ingot of heating to be flowed to rolling mill.
Rolling mill 1 comprises in an embodiment that to draw together hot-rolled band B finish rolling be to have the mm finishing mill unit of its specified exit thickness 2.Mm finishing mill unit 2 comprises a plurality of mill stands, wherein sees Fig. 1 along last mill stand 3 of Flow of Goods and Materials direction.
Usually, mm finishing mill unit comprises three or multimachine seat more.It particularly can be designed as the mm finishing mill unit of four, five or six supports.
At the hot-rolling mill that uses not shown reversible working, when being so-called Jill Sterkel formula (steckel-mill) milling train, rolling mill also can include only unique one or two mill stand.For enforcement of the present invention, the quantity of the mill stand that uses is less important.But a rolling mill has at least one mill stand usually.
Mm finishing mill unit 2 is connected with cooling end section 4 in current hot-rolling mill 1,, regulates to mechanical property, like phase fraction and the structure of band B by means of the cooling end section.
After cooling end section 4, the hot-rolled band B of cooling arrives on the capstan winch 6, and hot-rolled band B is wound in hot-rolled strip steel winding by means of capstan winch.
Hot-rolling mill 1 also shows many group driven rollers 7,8,9,10 or 11, and they are arranged between last mill stand 3 and capstan winch 6 of mm finishing mill unit 2.Its effect is that numerical value is carried on the hot-rolled band B through part as far as possible widely in cooling end section 4 greater than zero pulling force as far as possible for a long time.Sets 7,8,9,10 or 11 shortened band that under no tensile stress state, pass the part of cooling end section.Therefore this can improve quality of strip, the especially structure of producing, and this is that this band part is being cooled in the cooling end section under the no tension because reduced in the band part of taking the lead with magnetic tape trailer, and and then aggravates structural inhomogeneity.
Especially, Fig. 1 illustrate the driven roller arranged before the Flow of Goods and Materials direction next-door neighbour cooling end section 4 to 10 and after Flow of Goods and Materials direction next-door neighbour cooling end section the driven roller of layout to 11.Fig. 1 also show first driven roller between the starting point of cooling end section 4 and terminal point to 7, second driven roller to the 8 and the 3rd driven roller to 9.
Can relatively freely select by those skilled in the art in the starting point of cooling end section and the quantity of the driven roller between the terminal point.At this, relate to cost/performance evaluation, because the installing drive roller is to the certain expense of needs cost.But can improve quality of strip on the contrary.The driven roller that uses is to more and its spacing is more little, and then the share of the uneven band of structure is just more little.
Compare for a kind of favourable cost/benefit, proved practical to be, with band drive unit, right like driven roller, be distributed on the whole cooling end section, wherein the spacing of adjacent tapes drive unit is an equidistance, and is chosen between 20 to 50 meters.
According to Fig. 1, cooling end section 4 is divided into a plurality of cooling sections 5, and they can distinguish drive.Between each cooling section 5, arrange one group of driven roller 7,8 or 9, arrange that in the case a driven roller is to 7,8 or 9.Arranged that respectively another driven roller is to 10 or 11 before and after Flow of Goods and Materials direction next-door neighbour cooling end section along Flow of Goods and Materials direction next-door neighbour cooling end section.
Driven roller is to 7,8, and 9,10 or 11 can distinguish independent operating.In hot-rolling mill even running process, preferably make driven roller to 7,8, the engagement between 9,10 or 11 releasings and the band B.
Replacedly, they also can mesh with band.This is feasible in principle, but cost is huge aspect adjusting.
Before next-door neighbour's cooling end section 4 with arrange that respectively another driven roller is to 10 or 11 afterwards.This advantageous particularly is because can further shorten band passes cooling end section 4 under no tensile stress state when production process begins and finish section part like this.
The adjacent driven roller between spacing, for example first driven roller to 9 and second driven roller to the spacing between 10, preferably between 20 meters to 50 meters.The adjacent driven roller between spacing be variable.So, just can be according to local features, for example depend on and study along rolling mill structurally.But the adjacent driven roller between spacing equidistance preferably.In an embodiment, the adjacent driven roller between spacing should be respectively 40 meters.Can make cooling end section commonly used realize gratifying as far as possible cost/benefit ratio like this.
Driven roller is to 7,8, and 9,10,11 are connected with control and/or adjusting device 20 effects.This control and/or adjusting device are used to carry out embodiment according to the method for the invention, the embodiment of for example realizing according to Fig. 3 and Fig. 4.For this reason, transmit machine-readable program coding 22 to control and/or adjusting device 20, and storage preferably able to programme ground is with its preservation.Program coding 22 includes control command, and these control commands impel control and/or adjusting device to carry out this method in it is implemented.Can be through data medium 21 for example, for example CD, DVD or flash memory, or through the network that is connected with control and/or adjusting device 20 program coding 22 is transferred to and controls and/or adjusting device 20.
Hot-rolling mill 1 operating process shown in Figure 1 describes by Fig. 3 and Fig. 4, please see below.
Hot-rolling mill shown in Figure 2 is similar with Fig. 1.Only be that according to the hot-rolling mill of Fig. 2 and the difference of the hot-rolling mill among Fig. 1 cooling end section 4 is not divided into the cooling section 5 of space, sees Fig. 1.Or rather, cooling end section 4 is designed to continuous.Therefore just can not use a plurality of driven rollers pass through the cooling end section 4 pairs 7,8 or 9 cool off continuously.Therefore-if desired-they are meshed with the hot-rolled band B that needs cool off continuously.Through starting point and the driven roller between the terminal point that is arranged in the cooling end section cooled off 7,8 or 9, can prevent that driven roller is overheated to 7,8 or 9.
In Fig. 1 and Fig. 2, driven roller is to 7,8, and 9,10 or 11 are provided for, and when hot-rolled band penetrates and/or pass, it are loaded tension, particularly to partly loading in the starting point of cooling end section and the band between the terminal point.Reduce those band parts thus and under no state of tension, received issuable structural inhomogeneity when cooling off.
Fig. 3 illustrates a kind of right possible advantageous method of driven roller of when band penetrates hot-rolling mill, operating.The starting point of this moment is that all driven rollers are taken the lead and can be got into all being in open mode, that is to say, can not run into the side of driven roller.
Be furnished with before the Flow of Goods and Materials direction next-door neighbour cooling end section first driven roller to, referring to Fig. 1 or 2 for driven roller to 10.To take the lead whether to arrive this driven roller right in check in operating procedure 101.If do not arrive, then to as the next one will by the driven roller of process take the lead continue " take the lead through " incident is tested.This can accomplish by means of for example a kind of suitable measurement mechanism and/or band following calculation.
If take the lead or the band head right through the driven roller of arranging before next-door neighbour's cooling end section; Then in operating procedure 102, make this driven roller pair and band engagement, and for the driven roller that is in layout before last support of mm finishing mill unit and the next-door neighbour's cooling end section between band partly regulate specified tension.
In operating procedure 103, whether check takes the lead right to the driven roller of back through following the driven roller of before next-door neighbour's cooling end section, arranging, promptly according to the driven roller of Fig. 1 or Fig. 2 to 7.If there is not process, then continue the appearance situation of this incident of check.
If take the lead to pass through first driven roller in the cooling end section to 7, see Fig. 1, then in operating procedure 104, make this driven roller pair and band engagement.
At least temporarily be parallel to first driven roller 7 (seeing Fig. 1 or Fig. 2) are got in the cooling end section engagement process be, remove before the cooling end section driven roller to 10 with the engagement of band.This is an operating procedure 106.The foundation that is used for being arranged in the band tension partly between mm finishing mill unit and the cooling end section is right to first driven roller of handing to cooling end section (being between the starting point and terminal point of cooling end section) by the driven roller before next-door neighbour's cooling end section.Simultaneously; Will delivering to tension; Just participate in driven roller that tension delivers to controlling like this, keep constant basically even be in the tension of the band part between the sets of arranging before last support of mm finishing mill unit and the next-door neighbour's cooling end section.
For along the adjacent successively driven roller of Flow of Goods and Materials direction as far as; Realize in order setting up state to delivering tension, that is to say, hand to driven roller on 8 to 7 by driven roller by driven roller; Hand to driven roller on 9 by driven roller to 8; Hand to driven roller on 11 by driven roller to 9 again, it is right to handing to along the next driven roller of Flow of Goods and Materials direction by driven roller that tension is set up state, always take the lead through along the next driven roller of Flow of Goods and Materials direction to after carry out.
In operating procedure 107, last driven roller whether check takes the lead to pass through along Flow of Goods and Materials direction or transporting direction is right, is that driven roller is to 11 according to Fig. 1 or Fig. 2 promptly.If there is not process, then of preamble, continue check.In an embodiment, last driven roller is to being that driven roller after Flow of Goods and Materials direction next-door neighbour cooling end section is right.
If last driven roller of taking the lead to pass through along the Flow of Goods and Materials direction is right, this last driven roller arrives on the capstan winch up to band keeping engagement so, and sets up tension by means of capstan winch.
Whether band has arrived on the capstan winch, will in operating procedure 108, obtain check.
If take the lead to arrive capstan winch; Drive like this last driven roller to and capstan winch; Promptly tension set up state by last driven roller when handing in the process on the capstan winch; The tension that makes the band part that is in tension state and is passing the cooling end section preferably keeps constant and equals the tensile stress value through overregulating before state that tension is set up is handed to capstan winch all the time numerically greater than zero.
In case capstan winch is accepted the pulling force of sheet metal strip and set up state, last driven roller is to just removing engagement in operating procedure 109.Then, hot-rolling mill is in the stable operation.Then, all driven rollers in the present embodiment are removed engagement.
Fig. 4 illustrates and a kind ofly passes procedural example property flow process at the hot-rolling mill shown in Fig. 1 or Fig. 2.Starting point in this case also is to removing with band and mesh passing when beginning according to all driven rollers shown in Fig. 1 or Fig. 2.
In operating procedure 200, pass hot-rolling mill from band and begin, that is to say that an end of band particularly is with pin in the hot-rolling mill, is freely.
In operating procedure 201, whether the test strip pin has passed through a predetermined fiducial before last mill stand.This datum mark can be located at mm finishing mill unit along between last and the penult support of Flow of Goods and Materials direction, perhaps also can be more forward again, even can be in mm finishing mill unit before first support of Flow of Goods and Materials direction.As long as the band pin does not have through predetermined datum mark, then continue check.So preferably confirm this datum mark, guarantee that promptly to set up in the process of state tension non-vanishing delivering tension, that is to say for this system and consider the corresponding reaction time.
If the band pin has arrived datum mark; Will in operating procedure 202, make the driven roller arranged before next-door neighbour's cooling end section pair and band engagement, and make it when the band pin comes out, can in the cooling end section, be responsible for setting up tension at the latest from last mill stand of mm finishing mill unit.
What can realize thus is before the band pin leaves last mill stand, to make driven roller to can in the cooling end section, setting up tension.Otherwise the tension in the cooling end section can disappear when the band pin comes out from last support of mm finishing mill unit.If therefore like this, be arranged in the band between the terminal point of last support of mm finishing mill unit and cooling end section and can under the state of no tension, pass the cooling end section at least in part, this might cause the described structural inhomogeneity of preamble.Before the band pin is through last mill stand of mm finishing mill unit; Make first driven roller arranged along the Flow of Goods and Materials direction pair and band engagement; Can avoid this problem, this is because by means of this driven roller the starting point and the band between the terminal point that can continue as the cooling end section are partly set up tension.
In operating procedure 203, the driven roller that whether the test strip pin predetermined through, arrange before the Flow of Goods and Materials direction next-door neighbour cooling end section to before datum mark.
If there is not process, then continue check, up to band pin process predetermined fiducial.
In operating procedure 204, make now and follow the driven roller before next-door neighbour's cooling end section, arranged the driven roller of back pair and band engagement.This is in Fig. 1 and Fig. 2, and this is corresponding to right at the starting point and first driven roller between the terminal point of cooling end section along the Flow of Goods and Materials direction.
First driven roller pair and band are meshed like this, can so that band at the latest at the band pin when adjacent driven roller centering is come out along Flow of Goods and Materials direction the place ahead, for that part that is between first driven roller pair and the cooling end segment endpoint of band is set up tension.
In case it is right that first driven roller, just can be opened the driven roller of arranging before next-door neighbour's cooling end section to setting up tension.Its advantage is that tension is only set up by a sets.Replacedly, the driven roller of arranging before next-door neighbour's cooling end section is to also keeping shut, and is right through driven roller up to the band pin.Between these boundary conditions, can arbitrarily change.For example, also can in the short time before the band pin process, the sets of front be opened, so that improve the operation of band.
Above-mentioned about the driven roller arranged before next-door neighbour's cooling end section to and driven roller that the starting point and the right operating process of first driven roller between the terminal point of cooling end section will be applied in the back successively on.The band pin through be positioned at along the Flow of Goods and Materials direction front and adjacent driven roller to before, along the adjacent driven roller of Flow of Goods and Materials direction to closing all the time.This state continues up to that for example last driven roller is right, and is just right according to that driven roller after next-door neighbour's cooling end section among Fig. 1 and Fig. 2, gets into engagement.
In operating procedure 205, the test strip pin whether through one predetermined, along the Flow of Goods and Materials direction be arranged in last driven roller to before datum mark.Can make it keep engagement or otherwise operation to opening or remove engagement, close, that is to say last driven roller according to regulating strategy then.
Because particularly when the sets that is arranged in the front all no longer meshed with band, the tension that last sets after next-door neighbour's cooling end section no longer influences in the cooling end section was set up, professional's arrangement is accepted in this maintenance.
In case of necessity, can save the engagement that band passes last sets in the process fully, because this driven roller is to can bring into play bigger advantage usually in penetrating process.
Claims (15)
1. hot-rolling mill (1) that is used for rolling hot-rolling band (B); Comprise the cooling end section (4) that is used to cool off said hot-rolled band (B), it is characterized in that, after the starting point of said cooling end section (4) and along said Flow of Goods and Materials direction, before the terminal point of said cooling end section (4), arrange at least one band drive unit (7 along the Flow of Goods and Materials direction; 8; 9),, can regulate the tension of said hot-rolled band (B) by means of said band drive unit.
2. hot-rolling mill according to claim 1; It is characterized in that; After the starting point of said cooling end section (4) and along said Flow of Goods and Materials direction, before the terminal point of cold said but section (4), arrange a plurality of band drive units (7,8,9) along said Flow of Goods and Materials direction.
3. hot-rolling mill according to claim 2 is characterized in that, the spacing between two adjacent band drive units (7,8,9,10,11) is greater than 10m and less than 70m, particularly greater than 20m and less than 50m.
4. according to claim 2 or 3 described hot-rolling mills; It is characterized in that; Said cooling end section (5) has at least two spaced, as to emit cooling agent cooling sections (5) along said Flow of Goods and Materials direction, simultaneously, between said cooling section (5), is furnished with band drive unit (7; 8,9).
5. hot-rolling mill according to claim 4 is characterized in that, said cooling end section (4) has a plurality of spaced cooling sections (5) along said Flow of Goods and Materials direction; Simultaneously; Between all adjacent respectively cooling sections (5), be furnished with band drive unit (7,8,9).
6. according to each described hot-rolling mill in the aforementioned claim, it is characterized in that, arrange the band drive unit (10,11) that at least one is other before and/or afterwards in said cooling end section (4) along said Flow of Goods and Materials direction.
7. according to each described hot-rolling mill in the aforementioned claim, it is characterized in that the band drive unit of at least one (7,8,9,10,11) is designed to one group of driven roller (7,8,9,10,11).
8. one group of method of operating that is used for the hot-rolling mill (1) of rolling hot-rolling band (B); Wherein come rolling said hot-rolled band (B) by means of at least one mill stand (3); The band that wherein is rolled passes cooling end section (4); Wherein the said hot-rolled band (5) by means of said cooling end section (4) cooling is wrapped on the capstan winch (6), it is characterized in that, at least when the free end of said hot-rolled band (B) is positioned at said capstan winch (6) and on the Flow of Goods and Materials direction, is arranged between said cooling end section (4) last mill stand (3) before; Move at least one like this and be arranged in the starting point of said cooling end section (4) and the band drive unit (7 between the terminal point; 8,9,10; 11), promptly tension is carried on the part of passing cooling end section (4) of said hot-rolled band (B) by means of said band drive unit.
9. method according to claim 8 is characterized in that, between the terminal point of the starting point of said cooling end section (4) and cooling end section (4), arranges a plurality of band drive units (7,8,9,10; 11), wherein, take the lead through the first band drive unit (7,8,9,10 said; 11) afterwards, in penetrating process, make the said first band drive unit (7,8,9,10; 11) take the lead through the second band drive unit (7,8,9,10 with said band (B) engagement, and said; 11) afterwards, at least one said Flow of Goods and Materials direction in edge is at the said first band drive unit (7,8,9,10; 11) the second band drive unit (7,8,9,10,11) of back and said band engagement.
10. method according to claim 9 is characterized in that, when the said second band drive unit (7,8,9,10,11) meshed with said band (B), the said first band drive unit (7,8,9,10,11) was removed engagement.
11. method according to claim 10 is characterized in that, moves the said first band drive unit (7 like this; 8,9,10; 11) and the said second band drive unit (7,8,9; 10,11), even at least temporarily while and the engagement of said band in the process of removing engagement or entering engagement of the said first and second band drive units.
12., it is characterized in that the said first band drive unit (7 according to claim 10 or 11 described methods; 8,9,10; 11) remove engagement with said band like this, and the such and said band engagement of the said second band drive unit, promptly in the said process of removing engagement or entering engagement; Begin before just by means of the said first band drive unit (7,8,9 in said process; 10,11) tension of band (B) in band zone that is in tension state is numerically all the time greater than zero, particularly greater than zero and substantially constant.
13. each described method in 12 is characterized in that according to Claim 8, between the terminal point of the starting point of said cooling end section (4) and said cooling end section (4), arranges a plurality of band drive units (7,8,9; 10,11), wherein, in the process that said band (B) passes from said hot-rolling mill (1), at the said first band drive unit (7 of magnetic tape trailer process; 8,9,10,11) before, make the said first band drive unit (7; 8,9,10,11) with said band (B) engagement, at the said first band drive unit (7 of said magnetic tape trailer process; 8,9,10,11) make before, along the at the heel said second band drive unit (7 of said Flow of Goods and Materials direction; 8,9,10,11) with said band (B) engagement.
14. each described method in 13 is characterized in that at least one band drive unit (7,8,9 according to Claim 8; 10,11), particularly a plurality of band drive units (7,8,9; 10,11), during said hot-rolling mill (1) stable operation, remove engagement with said band.
15. a control and/or an adjusting device that is used for hot-rolling mill (1) has machine-readable, as to comprise control command program coding, said control command impels said control and/or adjusting device enforcement of rights to require each described method in 8 to 14.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10152741.4 | 2010-02-05 | ||
| EP10152741A EP2353742A1 (en) | 2010-02-05 | 2010-02-05 | Heat rolling train for rolling hot rolled strips, method for operating same to roll hot rolled strips, control and/or regulating device |
| PCT/EP2010/070916 WO2011095265A2 (en) | 2010-02-05 | 2010-12-30 | Hot rolling train for rolling hot-rolled strip, method for operating a hot rolling train for rolling hot-rolled strip, and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102740989A true CN102740989A (en) | 2012-10-17 |
Family
ID=42289476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800631225A Pending CN102740989A (en) | 2010-02-05 | 2010-12-30 | Hot rolling train for rolling hot-rolled strip, method for operating a hot rolling train for rolling hot-rolled strip, and control/adjustment device |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2353742A1 (en) |
| CN (1) | CN102740989A (en) |
| WO (1) | WO2011095265A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115161467A (en) * | 2022-06-21 | 2022-10-11 | 西门子（中国）有限公司 | Furnace bottom roller way control method and device of heating furnace, frequency converter, equipment and medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234184A (en) * | 2015-11-10 | 2016-01-13 | 内蒙古包钢钢联股份有限公司 | Steel pilling-up protective method for serial type rolling mill |
| DE102017118244A1 (en) | 2017-08-10 | 2019-02-14 | Thyssenkrupp Ag | Apparatus and method for producing a hot strip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0153688A1 (en) * | 1984-02-20 | 1985-09-04 | Nippon Steel Corporation | Method of cooling hot steel plates |
| WO2001047648A2 (en) * | 1999-12-27 | 2001-07-05 | Siemens Aktiengesellschaft | Method for controlling and/or regulating the cooling stretch of a hot strip rolling mill for rolling metal strip, and corresponding device |
| CN1589184A (en) * | 2001-11-15 | 2005-03-02 | 西门子公司 | Control method for a finishing train, arranged upstream of a cooling section, for rolling hot metal strip |
| CN1606630A (en) * | 2001-12-20 | 2005-04-13 | Sms迪马格股份公司 | Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill |
| JP4287740B2 (en) * | 2001-06-20 | 2009-07-01 | シーメンス アクチエンゲゼルシヤフト | Cooling method for hot-rolled material and corresponding cooling section model |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101444564B1 (en) * | 2009-10-07 | 2014-09-24 | 신닛테츠스미킨 카부시키카이샤 | Cooling apparatus and cooling method for hot rolling |
-
2010
- 2010-02-05 EP EP10152741A patent/EP2353742A1/en not_active Withdrawn
- 2010-12-30 CN CN2010800631225A patent/CN102740989A/en active Pending
- 2010-12-30 EP EP10803255A patent/EP2531309A2/en not_active Withdrawn
- 2010-12-30 WO PCT/EP2010/070916 patent/WO2011095265A2/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0153688A1 (en) * | 1984-02-20 | 1985-09-04 | Nippon Steel Corporation | Method of cooling hot steel plates |
| WO2001047648A2 (en) * | 1999-12-27 | 2001-07-05 | Siemens Aktiengesellschaft | Method for controlling and/or regulating the cooling stretch of a hot strip rolling mill for rolling metal strip, and corresponding device |
| JP4287740B2 (en) * | 2001-06-20 | 2009-07-01 | シーメンス アクチエンゲゼルシヤフト | Cooling method for hot-rolled material and corresponding cooling section model |
| CN1589184A (en) * | 2001-11-15 | 2005-03-02 | 西门子公司 | Control method for a finishing train, arranged upstream of a cooling section, for rolling hot metal strip |
| CN1606630A (en) * | 2001-12-20 | 2005-04-13 | Sms迪马格股份公司 | Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115161467A (en) * | 2022-06-21 | 2022-10-11 | 西门子（中国）有限公司 | Furnace bottom roller way control method and device of heating furnace, frequency converter, equipment and medium |
| CN115161467B (en) * | 2022-06-21 | 2023-08-04 | 西门子（中国）有限公司 | Method and device for controlling bottom roller way of heating furnace, frequency converter, equipment and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2531309A2 (en) | 2012-12-12 |
| WO2011095265A3 (en) | 2012-01-12 |
| WO2011095265A2 (en) | 2011-08-11 |
| EP2353742A1 (en) | 2011-08-10 |
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Application publication date: 20121017 |