CN1107764A - Continuous annealing apparatus of steel strip and tension control system for the same - Google Patents
Continuous annealing apparatus of steel strip and tension control system for the same Download PDFInfo
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- CN1107764A CN1107764A CN 94105566 CN94105566A CN1107764A CN 1107764 A CN1107764 A CN 1107764A CN 94105566 CN94105566 CN 94105566 CN 94105566 A CN94105566 A CN 94105566A CN 1107764 A CN1107764 A CN 1107764A
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- roll
- steel band
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- tension force
- buffer
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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
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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
- C21D9/562—Details
- C21D9/564—Tension control
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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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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
In a continuous process line for manufacturing a soft steel strip for drawing, etc., the present invention relates to a continuous annealing apparatus and a tension control system for the same for preventing the occurrence of heat buckling, scratching and walking of the steel strip and improving productivity and quality. In a continuous annealing furnace of a steel strip including a heating zone, a soaking zone, a primary cooling zone, an overaging zone and a secondary cooling zone, the invention characterized in that a bridle roll is interposed between the overaging zone and the secondary cooling zone, and a first bridle roll and a second bridle roll and a buffer roll coming into contact with the steel strip between both of the bridle rolls are ydisposed on an entry side and/or delivery side.
Description
The present invention be used for making in the tinuous production pull and stretch processing and the continuous annealer of soft steel band and used tenslator such as use relevant, these devices can prevent in the continuous production that steel band produces warpage, scratch and vestige, thereby can boost productivity and the quality of product.
In the prior art, in tinuous production, steel band whole piece steel band ground such as steel sheet are carried out various processing.The so-called processing is meant that various processing such as annealing, pickling, plating, these processing utilize continuous annealing line, continuous pickling line, continuous electroplating line to finish.When sending the whole piece steel plate to, the product side of going at production line is emitted with the steel plate that take-off reel will be rolled into volume, and welds together with the rear end of steel band in advance, in the product side of production line with the tensioning belt reel with the roll of steel plate rolling, and the cut-out weld, again back row steel band is rolled into volume with the tensioning belt reel.
In such tinuous production, draw in the time at place in the weld interval of inlet side with in the cut-out weldering of outlet side, because must send the treatment facility of whole piece steel band to by certain speed in accordance with regulations by annealing device etc., so loop lifter is being set, the line speed of going forward side by side adjustment between treatment facility and the inlet side equipment and between treatment facility and the outlet side equipment.In addition, when the thickness of slab of steel coil strip to be processed and the wide variation of plate, perhaps metal such as steel grade is formed when changing, and also must change the speed of sending steel band in treatment facility to, and the while also will be adjusted the speed of inlet/outlet side apparatus.
Particularly, be used for pull and stretch processing and the soft steel bands such as soft tinplate used as raw sheet, after cold rolling calendering, be in continuous annealing furnace, anneal and ageing treatment produced.This continuous annealing furnace owing to be provided with to steel band being heated to the heating zone of specified temperature, is used for the annealed soaking zone, is used for the primary cooling zone of ageing treatment, and overaging district and secondary cooling zone are so equipment is grown up.
Usually, in the production line of steel band etc., take-up roll is set, applies suitable tension force to steel band etc., so that stably send steel band at the inlet side and the outlet side of production line.If the tension force deficiency of steel band, steel band are crawled and sent to and contact with furnace wall etc., will on steel band, produce scratch, if the overtension of steel band will produce the pull and stretch wrinkle of steel band length direction, just said warpage.
Because the continuous annealing furnace of steel band is grown up, it is inconvenient staying and applying suitable tension force by the steel band of total length in the stove with the take-up roll behind the stokehold.Therefore, take-up roll also is set and carries out tension control in stove.This point, open in the clear 50-139707 communique open in reality, promptly such shown in the 1st figure, steel band S is except inlet side take-up roll 1 and outlet side take-up roll 2 with the front and back that continuous annealing furnace F is set, also with being arranged between heating zone 4 and the heat preservation zone 5, and heat preservation zone 5 and cooling zone 6(also can be provided with above-mentioned overaging district) between the take-up roll that in stove, is provided with 3 carry out the tension adjustment of steel band S.
And, in the public clear 60-7693 communique of spy, disclose at the outlet side of heating zone outlet side and take-up roll has been set, makes steel band at the heating zone of thermal expansion tension force height with the soaking zone, heating zone outlet side and the soaking zone tension force of steel band after softening is low, also at the inlet side and the outlet side of primary cooling zone take-up roll is set simultaneously, makes the change of shape of the cold easy generation cooling warpage of speed etc. cause the tension force of primary cooling zone low.
Open in the flat 1-162727 communique the spy, disclose shown in the 2nd figure such, many take-up rolls are divided into 2 groups (7A and 7B, 8A and 8B), dance roller 10 is set between them, because only use the tension change that take-up roll can not the absorbing high-frequency momentary variation, the device of the dance roller 10 that utilization can move up and down absorbs the control tensile to be changed.Open in the flat 1-165726 communique the spy, disclose the control method of said apparatus.In the technology of above two communiques, dance roller 10 is sling steel band S between guide roller 9c and second group of take-up roll 8A upward, utilizes wireline 11 by cylinder 13 and damper weight 12 balances.The 14th, with the motor of certain torque drive cylinder 13 rotations.
Also open in the flat 5-43099 communique the spy, disclose between conveying roller and movable conveying roller and sent steel band to, utilize moving of movable conveying roller to control in the tensile device of steel band, being provided with the supporting axis is that rotate at the center, and with the supporting axis end opposite lever of removable conveying roller is being set; Direct-connected with supporting axis, and on the lever that with the supporting axis is the center, produce moment of torsion to apply the tensile electric motor to steel band; Detect the angle analyzer of the rotational angle of lever; Detect the tensile tonometer of steel band and utilize above-mentioned detect angle and detect the tension force correction be created in moment of torsion on the lever, thereby with the tenslator that is controlled in the goal tension of opening of steel band.
When the above-mentioned spy of diagrammatic representation opens the major portion of disclosed device in the flat 5-43099 communique, as the 3rd figure, said conveying roller is exactly a guide roller 9 in this communique, same said movable conveying roller is exactly a dance roller 10, make these rollers and take-up roll 8 adjacency, and dance roller 10 freely is bearing on the lever 16 by rotatable, and lever 16 is that the center can be swung with supporting axis 15, and dance roller 10 is moved up and down.Compare with the dance roller that the 2nd figure is such, utilize such mechanism to make dance roller 10 moving up and down, its mechanical resistance is little, and the inertia that moves is also low, to fast from the fast tension change response of the urgency of outside, thereby can control tension force accurately.
And, in the 3rd figure, the 18th, make the torque motor, the 19th of supporting axis 15 rotation, detect the angle analyzer of lever 16 corners, 17 are arranged on being used at supporting axis 15 for producing the damper weight of moment of torsion on the lever 16 at center on the lever 16, the 20th, be used for shifting balance and weigh 17 motor, the 21st, detect the analyzer of damper weight 17 positions, these all are to be provided with as required.Utilize the position adjustment of this damper weight 17, just can control the moment of torsion that is created on the lever 16, so just can make torque motor 18 low capacityizatioies.
But, sending in the occasion of thin steel band at a high speed, when the tension change of high frequency particularly takes place, during with the such dance roller 10 of above-mentioned the 2nd figure, because of the inertia of its mechanical system is big, so tension change that can not absorbing high-frequency.And during with the dance roller 10 of the such lever rotary type of above-mentioned 3 figure, because of the inertia of its mechanical system little, just can absorb the high frequency tension change that reaches to a certain degree, dance roller being set is a lot of spatial that will occupy equipment, particularly in the occasion of transforming existing production line, the problem that runs into is to can not find very suitable position dance roller is set.
Particularly, in the steel band continuous annealing furnace that is provided with heating zone, soaking zone, primary cooling zone, overaging district, secondary cooling zone, carry out when the steel band of primary cooling zone cools off with the gas injection water cooler, not only on the surface of steel band, produce scratch, and in water-cooling groove thereafter, this steel band that is called as vestige produces swing.
The such scratch and the problem of vestige though utilize the inlet side of continuous annealing furnace and the take-up roll increase stove internal tension of outlet side to be eliminated,, can produce warpage in the overaging district.Though in above-mentioned each communique, be provided with the take-up roll in the stove on disclosed particularly such position, also do not have effect.Therefore, have with conventional device be the speed that do not have other operation to be used to control to send steel band to.
The object of the present invention is to provide a kind of small sheet force control device, this device is in the tinuous production of steel band, in sending occasions such as approaching steel band at a high speed to, when producing the high frequency tension change that inlet side and outlet side etc. locate, can control tension force does not pass on the treatment facilities such as annealing device, and can with original suitable tension stability send steel band to, thereby can prevent steel band reliably because fold, shrinkage in width, the scratch cut that crawls and relax and on steel band, produce, and in existing production line, also this device can be set easily.
The present invention also aims in the continuous annealing furnace of steel band, can prevent reliably that steel band from producing warpage, scratch and vestige, boost productivity and the quality of product with heating zone, soaking zone, primary cooling zone, overaging district, secondary cooling zone.
Major technique measure of the present invention is as follows:
(1) continuous annealer of steel band, in steel band continuous annealing furnace with heating zone, soaking zone, primary cooling zone, overaging district, secondary cooling zone, it is characterized in that, take-up roll in the stove is set between overaging district and secondary cooling zone, utilize the interior take-up roll of this stove that the steel band tension force of inlet side is reduced, utilize the interior take-up roll of this stove that the steel band tension force of outlet side is improved.
(2) tenslator of steel band, in the tinuous production of steel band, near inlet side and/or near outlet side take-up roll outside one group of relative stove is set at treatment facility, it is characterized in that, be provided with the 1st take-up roll and the 2nd take-up roll and with pass through, the buffer roll that steel band between the 1st take-up roll and the 2nd take-up roll is abutted against is corresponding with the tension variation of this steel band, and can be connected this buffer roll before and after the cross one another direction rotation of line of span of take-up roll move, the arm by controlling this buffer roll and the angle α of span line adjust the tension force of steel band.
(3) the steel band tenslator of being put down in writing as (2) is characterized in that, the angle α of buffer roll arm and span line in the expression (1) of following F, α
0Be P maximum value, its border is 0
0＜α≤α
0Perhaps α
0≤ α＜90 ° utilize α is controlled at the tension force that steel band is adjusted on above-mentioned limit in doing.
F=T
Mcos α｛sin(tan
-1(R′sin α)/(L
1) ) + sin(tan
-1(R′sinα)/(L
2) ) ｝(1)
Wherein: R '=R-(b)/(sin α)
L
1=a - c ()/() (b)/(tanα) , L
2= c + (b)/(tan α)
A: buffer roll arm fulcrum,
B: span links to the distance of fulcrum,
C: fulcrum to the 2 take-up roll inlet side roll gaps,
α: the angle of buffer roll arm and span line,
R: the buffer roll brachium,
A: the distance between the 1st take-up roll outlet side roller (or guide roller) and the 2nd take-up roll inlet side roller (or guide roller),
T
m: the tension force of steel band,
F: by steel band tension force T
mAct on the power on the buffer roll.
(4) continuous annealer of steel band, in the continuous annealing furnace of steel band, it is characterized in that, sending between the basement of steel band space of overaging district and secondary cooling zone take-up roll in the stove is set, also at the inlet side and/or the outlet side of this continuous annealing furnace, take-up roll and the tenslator that is abutted against the steel band that constitutes by buffer roll and steel band is set between them outside at least one group of relative stove.
(5) tenslator of the steel band of being put down in writing as (2) to one of (4) is characterized in that, but the axle free rotary ground supporting of buffer roll is provided with and drives the torque motor that this supporting axis rotates on the arm that is fixed on the supporting axis.
(6) the steel band tenslator of being put down in writing as (5) is characterized in that, damper weight is set on supporting axis.
Fig. 1 is an existing apparatus example longitudinal diagram;
Fig. 2 is the example explanatory view of existing apparatus;
Fig. 3 is the example explanatory view of existing another device;
Fig. 4 is the longitudinal diagram of apparatus of the present invention embodiment;
Fig. 5 is the stereographic map of apparatus of the present invention embodiment;
Fig. 6 is the stereographic map of another example of the buffer roll in apparatus of the present invention;
Fig. 7 (a)～Fig. 7 (f) is the explanatory view of another example of apparatus of the present invention;
Fig. 8 is the example longitudinal diagram of apparatus of the present invention;
Fig. 9 (a) is the graphic representation of the embodiment of apparatus of the present invention;
Fig. 9 (b) is the explanatory view of the vibratory magnitude W of the steel band in the embodiments of the invention;
Figure 10 is the device longitudinal diagram of Comparative Examples;
Figure 11 is Controlling System figure in the embodiments of the invention;
Figure 12 is the tension control explanatory view of buffer roll of the present invention;
Figure 13 is that pass between buffer roll arm angle of the present invention and the tension force is as diagrammatic sketch.
The present invention produces in order to solve above-mentioned the problems of the prior art.
The 1st technical characterictic as shown in Figure 4, has heating zone 22, and soaking zone 23, primary cooling zone 24 among the steel band continuous annealing furnace F of overaging district 25, secondary cooling zone 26, are provided with take-up roll 3 in the stove between overaging district 25 and secondary cooling zone 26.
The 2nd technical characterictic, in the tinuous production of centre steel band, shown in the 5th figure, be provided with the 1st take-up roll, the 2nd take-up roll and and the buffer roll by being abutted against with steel band between this two take-up roll, the tension variation of this buffer roll and this steel band is corresponding, and can move with the cross one another direction rotation of the line of the span that is connected the take-up roll before and after the buffer roll, the angle α of buffer roll arm and span line in following F expression (1), α
0Expression maximum value, its border is 0
0＜α≤α
0Perhaps α
0≤ α＜90 ° utilize α are controlled at the tension force of adjusting steel band in the above-mentioned border.
F=T
Mcos α｛sin(tan
-1(R′sin α)/(L
1) ) + sin(tan
-1(R′sinα)/(L
2) ) (1)
Wherein: R '=R-(b)/(tan α),
L
1=a - c ()/() (b)/(tanα) , L
2= c + (b)/(tan α)
A: buffer roll arm fulcrum,
B: span links to the distance of fulcrum,
C: fulcrum to the 2 take-up roll inlet side roll gaps,
α: the angle of buffer roll arm and span line,
R: the buffer roll brachium,
A: the distance between the 1st take-up roll outlet side roller (or guide roller) and the 2nd take-up roll inlet side roller (or guide roller),
T
m: the tension force of steel band,
F: by steel band tension force T
mAct on the power on the buffer roll.
At first, the 1st feature is illustrated following.
In Figure 14, the steel band S of cold rolling calendering is sent through behind the washing unit by not shown take-off reel, enters continuous annealing furnace F by the loop lifter of inlet side and the take-up roll of inlet side.In continuous annealing furnace F, 22 be heated to the temperature of regulation in the heating zone, 23 annealing times that are soaked to regulation are annealed in the soaking zone, after primary cooling zone 24 coolings, 25 carry out the overaging processing in the overaging district, cooling in secondary cooling zone 26 and water-cooling groove 28 again, steel band S just is processed to have the steel band of processing characteristicies such as desired drawability like this.At secondary cooling zone 26, steel band is cooled off with suitable speed of cooling by gas injection water cooler 27.Then, in drying machine 29, carry out drying, more in the end cooling zone 30 be cooled to can modified calendering temperature.At last, in the take-up roll 2 of outlet side and figure not behind the modified rolling press of expression on the belt reel.When series connection is not provided with modified rolling press on production line,, just do not need to be provided with last cooling zone 30 in this occasion.
Each take- up roll 1,2,3 all is made of a plurality of rollers, and its surperficial frictional coefficient is big, and also big with the contact area of steel band S.In device of the present invention, at first adjust the difference of take-up roll 3 in inlet side take-up roll 1 and the stove, be adjusted at the tension force of the steel band S in heating zone 22, soaking zone 23, primary cooling zone 24 and overaging district 25 then.And, the difference of take-up roll 3 and outlet side take-up roll 2 in the adjustment stove, the tension force of steel band S in adjustment secondary cooling zone 26 and the water-cooling groove 28.
In order to make the good thin steel bands of processing characteristics such as drawability, steel band after overaging must being handled is classified to cool off with suitable speed of cooling, in addition, in order to prevent to produce the generation of bad shapes such as cooling warpage, carry out quick cooling with cost effective device water-cooling groove 28 again after in secondary cooling zone 26, cooling off more lentamente with gas injection water cooler 27.In conventional device, in the occasion that thickness of slab is thin, width is wide of steel band S, in secondary cooling zone 26, when the cold wind of the gas injection water cooler of usefulness was strong, big vibration took place in steel band S, as described above, steel band S contacts with this gas injection water cooler 27, thereby produces the scratch cut of steel strip surface, and, in water-cooling groove 28, because hydro-planing steel band S is easy to generate vestige.As the countermeasure of above problem, when adopting the tension force that improves in the continuous annealing furnace F, temperature of steel strips in overaging district 25, is easy to generate the problem of warpage than higher again on the steel band S.
In device of the present invention, because take-up roll 3 in the stove is set between overaging district 25 and secondary cooling zone 26, so can adjust the tension force of its front and back respectively.Promptly as opening of the 4th figure distributed, the tension force in overaging district 25 can not produce excessive phenomenon, and the steel band tension force in secondary cooling zone 26 and water-cooling groove 28 also can be brought up to suitable size.Therefore, can not produce warpage, can prevent to produce the scratch cut on steel band S surface and the vestige that in upright cold trap 28, produces yet at secondary cooling zone 26 in overaging district 25.
And, in the device of the present invention of the 4th figure, when the tension force of steel band S in the heating zone 22, soaking zone 23, when changing in primary cooling zone 24 and the overaging district 25, can adjust its tension force by dance roller 31 is moved up and down, tensile changes can utilize the roller that is arranged between inlet side take-up roll 1 and the interior take-up roll 3 of stove, for example roller 32, detect roller as tension force and detect its variation, receive the tension value that detects feeds back to inlet side dance roller 31 as torque command drive-motor then.After inlet side dance roller 31 was moved up and down, the tension force in stove was under the upset condition, Yi Bian adjust the circumferential speed of inlet side take-up roll 1, Yi Bian make inlet side dance roller 31 get back to original position.
When the tension force of steel band S during change, utilizes the outlet dance roller 34 that makes near outlet side take-up roll 2 to move up and down the tension force of adjusting steel band S in secondary cooling zone 26 and water-cooling groove 28.Tensile change can utilize tension force to detect roller 33 grades and detect, outlet side stretch roll 34 is moved up and down after, under the state that tension force does not change, Yi Bian adjust the circumferential speed of oral-lateral take-up roll 2, Yi Bian make outlet side dance roller 34 revert to original position.
Also in overaging district 25 and in the secondary cooling zone 26 tension force analyzer 35 and 36 are set respectively, are used for measuring tension force, again these measured value feedbacks are used to drive take-up roll 3 and outlet side take-up roll 2 in the stove, this is also very effective.
Below, the 2nd technical characterictic of the present invention is described.
Device of the present invention shown in the example of the 5th figure, shown in the example of the 5th figure, is provided with the 1st take- up roll 7A and 7B, the 2nd take- up roll 8A and 8B and buffer roll 37.Buffer roll 37 be abutted against mutually by the steel band S between the 1st take- up roll 7A and 7B and the 2nd take-up roll 8A and the 8B, and it is corresponding with the tension change of steel band S, this buffer roll 37 can be connected roller before and after it (among Fig. 5, the 2nd roller 7B in the 1st take-up roll and the 1st roller 8A in the 2nd take-up roll) the rotation of the cross one another direction of span line L move (moving) along the direction of arrow, and, the angle of buffer roll arm and span line is represented with α, the 12nd figure provides and closes as represent α with following expression (1)
0Be F maximum value, its border is 0
0＜≤α
0, perhaps, α
0≤ α＜90 ° utilize α are controlled at the tension force of adjusting steel band in the above-mentioned border.
F=T
Mcos α｛sin(tan
-1(R′sin α)/(L
1) ) + sin(tan
-1(R′sinα)/(L
2) ) (1)
Wherein: R '=R-(b)/(sin α)
L
1=a - c ()/() (b)/(tanα) , L
2= c + (b)/(tan α)
A: buffer roll arm fulcrum,
B: span links to the distance of fulcrum,
C: fulcrum to the 2 take-up roll inlet side roll gaps,
α: the angle of buffer roll arm and span line,
R: the buffer roll brachium,
A: the distance between the 1st take-up roll outlet side roller (or guide roller) and the 2nd take-up roll inlet side roller (or guide roller),
T
m: the tension force of steel band,
F: by steel band tension force T
mAct on the power on the buffer roll.
The 13rd figure expresses the relation of α and F, when by conditional decision has been set T
m, after a, b, c, the R, just decided α
0
In following formula (1) formula, α
0During the maximum value of corresponding F, just formed the curve of epirelief.At α
0Front and back, control the increase and decrease of F, α will be controlled at 0 °＜α≤α
0Perhaps α
0In the scope of≤α＜90 °.If consider the appointed condition of machinery, preferably α be controlled at 0 °＜α≤α
0Scope in.
But, such in fact as described later, owing to use so-called F=T
mCOS α (Sin θ
1+ Sin θ
2) formula revise, use the scope of 0 °＜α＜90 ° also no problem.Tiltangle, because the shift position of buffer roll 37, its value is different at inlet side and outlet side, as shown in the figure, is θ at inlet side
1, be θ at outlet side
2
The moving range of the buffer roll 37 in apparatus of the present invention designs like that according to above-mentioned, and this buffer roll is the light weight roller of hollow, so its inertial pole is low, compare with the dance roller of the prior art 10 shown in the 2nd figure and the 3rd figure, can move more sensitively tension change.Therefore, when high frequency change sharp takes place the tension force of the steel band S of the inlet side of apparatus of the present invention or outlet side, utilize buffer roll 37 also can absorb the rapid high frequency change of the tension force that takes place.
The example of the 5th figure represents that ideal structure of the present invention, buffer roll 37 are that hollow roller, the rotatable free earth's axis are bearing on the arm 6, and arm 6 is fixed on the supporting axis 15.Supporting axis 15 by the stand rotatably support of representing among the figure, drives supporting axis 15 with torque motor 18 and rotates, and buffer roll 37 is just rotated mobile along the direction of intersecting with span line L like this.
And in the present invention, the rotation of buffer roll 37 is moved except that with being the torque motor driving shown in the 5th figure, also can drive with oil pressure or air pressure etc.
In the 5th figure, each take- up roll 7A, 7B, 8A, 8B have the very big surface of frictional coefficient, and, being configured to has very big contact area, drives with drive- motor 38A, 38B, 39A, 39B with steel band S, buffer roll 37 is non-drivings, and it is along with steel band S's sees off the energy free rotary ground supporting on arm 6.
Steel band S is sent in the direction of arrows by the rotation of each take- up roll 7A, 7B, 8A, 8B, because each roller has friction resistance, thereby makes the tension force T of inlet side
1Tension force T with outlet side
2Be separately independently.Apparatus of the present invention make buffer roll 37 and steel band S be abutted against between the 1st take- up roll 7A and 7B and the 2nd take- up roll 8A and 8B, in the 5th figure, are pressed against on the steel band S above span line L, have so just produced intermediate tension T on steel band S
m
At this state, for example, as inlet side tension force T
1Add the tension change △ T of high frequency, promptly become T
1During+△ T, intermediate tension T
mCan correspondingly become T
m+ △ T, this is because buffer roll 37 is pressed on the steel band S this moment of torsion and intermediate tension T with certain moment of torsion by torque motor 18
mBalance each other, utilize the low buffer roll of inertia 37 corresponding tension change amount △ T to be rotated to move and moving up and down, so just intermediate tension is maintained in T by buffer roll 37
m Be buffer roll 37, △ T be on the occasion of the time move downwards, be moved upward during at △ T for negative value, so just can be absorbed into oral-lateral tension force T
1Variation, thereby can not involve outlet side tension force T
2And, when inlet side tension force is got back to T
1The time, buffer roll 37 also revert to the home position.Equally, as outlet side tension force T
2During change, can not involve yet and have influence on inlet side tension force T
1
As inlet side tension force T
1Change is T
1During+△ T, the also corresponding change of intermediate tension is T
m+ △ T detects its variation, and the motivating force of control torque motor 18 changes angle [alpha], makes buffer roll moving up and down by electric power, thereby absorbs its variation.Even if this control can not be followed the tracks of the tension change of high frequency, utilizes T
mCan make the buffer roll 37 that is pressed against on the steel band mechanically moving up and down with balancing torque, also can absorb its variation.
In apparatus of the present invention, the torsional interaction that makes progress that certain motivating force of torque motor 18 is produced by buffer roll 37 can prop up the pressure of control action kou on steel band S according to inclined angle alpha on steel band S.In this mechanism, scope that can drooping 0≤α≤90 ° is controlled, and when controlling with alpha position, input tension force set(ting)value is given and motivating force by torque motor 18, detects tension force at this moment, feeds back as the goal tension value.And the power on the buffer roll 37 is at intermediate tension T on
mOne regularly, will be with inclined angle alpha, and tiltangle, and θ
2Change, this can utilize (2) formula to carry out the tension force correction.Set the moment of torsion of torque motor 18 according to the F of input.
F＝T
mcosα（Sinθ
1+Sinθ
2） （2）
F: act on the power on the buffer roll 37.
T
m: the tension force (intermediate tension) at buffer roll 37 places.
And, in apparatus of the present invention, when the tension change of steel band S is slow, should adjust the moment of torsion of torque motor 18, adjust the rotation round speed of the 1st take- up roll 7A and 7B or the 2nd take- up roll 8A and 8B simultaneously with drive- motor 38A and 38B or 39A and 39B, control.Above-mentioned tension change amount △ T makes buffer roll 37 revert to original position after being absorbed by buffer roll 37, adjusts the circumferential speed of the 1st take-up roll or the moment of torsion of torque motor 18 again.
Such apparatus of the present invention are arranged on the inlet side and/or the outlet side of the treatment facility of annealing device in the tinuous production of steel band etc., when the action of the loop lifter of production line inlet side increase and decrease speed hastily takes place and when producing tension change, this tension change can not pass on the treatment facility, can guarantee that the steel band in the treatment facility normally sends to suitable certain force of strain effect, so just can prevent warpage reliably and abrade cut.Also change the tension change that causes, can prevent to produce on the steel band warpage and scratch cut equally reliably owing to can absorb the treatment facility feed rate.
In the present invention, such as shown in the figure 6, damper weight 17 be set be very ideal on the supporting axis 15 of buffer roll 37.In the 6th figure, produce the moment of torsion that buffer roll 37 makes progress by damper weight 17, if this structure is used in the example of the 5th figure.Just can reduce the motivating force of moment of torsion electricity 18.Damper weight 17 also can adopt the size of the direction of being abutted against according to buffer roll 37 and steel band S and moment of torsion to adjust the structure of its position and weight except that the example shown in the 6th figure.
When being applied to apparatus of the present invention in the tinuous production, or be used in the newly-designed production line, or be used in the existing production line, can both be arranged at an easy rate on the optimal position.Its example that is suitable for is illustrated in the 7th figure (a) to the 7th figure (5).The 7th figure (a) is being provided with guide roller 9 between buffer roll 37 and the 1st take-up roll 7B and between the 2nd take-up roll 8A, and it doesn't matter for the cornerite of each steel band S of take-up roll place and the rotation shift position of buffer roll 37, and its cornerite is certain, so take-up roll is unaffected.
But, when not having guide roller 9, shown in the 5th figure, perhaps shown in the 7th figure (b) and following figure like that, the cornerite of take- up roll 7B and 8A is to change with the position that the rotation of buffer roll 37 is moved, and keeps necessary cornerite also problem can not take place on such take-up roll.
Then, the 3rd technical characterictic of the present invention is described.Such embodiment is illustrated among the 8th figure.This combines aforesaid the 1st technical characterictic and the 2nd technical characterictic and forms.
Promptly, between the overaging district 25 of continuous annealing part and secondary cooling zone 26, take-up roll 3 is set, inlet side and/or outlet side are provided with take- up roll 7A, 7B, 8A, 8B relative more than one group at least near also outside stove, and between them aforesaid buffer roll 37 are set in a position at least.Utilize this device, by being arranged on the tension force that take-up roll 3 in the stove between overaging district 25 and the secondary cooling zone 26 just can be adjusted at take-up roll 3 front and back respectively independently.Utilize take- up roll 7A, 7B, 8A, 8B and the buffer roll 37 of inlet side and/or outlet side can prevent that the tension change that is produced by the increase and decrease speed hastily of the action of the loop lifter of production line inlet/outlet side from passing to the steel band of continuous annealing apparatus again, steel band is sent under suitable certain tension force effect.
Below, embodiments of the invention are described.
Embodiment 1:
In the apparatus of the present invention shown in the 4th figure, be that 0.24 millimeter to 0.26 millimeter, plate wide are that 1024 millimeters mild steel steel band is sent continuous annealing to thickness of slab.In secondary cooling zone 26, be spaced apart 150 millimeters between gas injection water cooler 27 and the steel band S, from gas injection but the wind speed of device 27 be 30 meter per seconds, feed rate is 500 meters/minute when thickness of slab is 0.24 millimeter, be 430 meters/minute when thickness of slab is 0.26 millimeter.Utilize interior take-up roll 3 of stove and outlet side take-up roll 2 to make the tension force T of the steel band S of secondary cooling zone 26
bChange, and measure the vibratory magnitude of steel band S, its result is than the steel band tension force T in heating zone 22～overaging district 25
aGreatly, shown in the 9th figure (a) like that, make its difference △ T=(T
b-T
a) in 4 Newton/millimeter
2When above, the vibratory magnitude W of steel band S is stabilized in 100 millimeters, does not produce the scratch cut.At this moment, many belt tensions T in heating zone 22～overaging district 25
aBe 6 Newton/millimeter
2Vibratory magnitude W like that, is the vibratory magnitude in span line one side of the steel band S that dots shown in the 9th figure (b).
And, make △ T in 4 Newton/millimeter
2When above, eliminated the mark problem of steel band S.This vestige is owing in water-cooling groove 28, enter the hydro-planing of water generates steel band S between steel band S and the roller, steel band S is shaken on roll axial direction produce.In apparatus of the present invention,, can hinder water and immerse between steel band and the roller, so can eliminate mark problem because tension force improves.
And even carry out the tension adjustment of steel band S in such secondary cooling zone 26, the steel band tension force in the stove before overaging district 25 reaches also is to keep certain, does not therefore also produce warpage.
In the represented continuous annealing furnace F of the 4th figure, do not establish take-up roll 3 in the stove, shown in the 10th figure, secondary cooling zone 26 respectively by every pair of spatial roller up and down between the support roller 40 that contacts with steel band is set, the vibration of inhibition steel band S between two places and the gas injection water cooler 27.Except that △ T=0 and the invention described above embodiment carry out steel band with same condition and send to, can prevent from also that steel band S from contacting with gas injection water cooler 27 to produce steel band scratch cut, can be at this moment, support roller 40 should be driven.Yet because the position that support roller 40 is set can not be provided with gas injection water cooler 27, thereby effective cooling length has as a whole been reduced, what therefore must increase secondary cooling zone 26 passes through the space number.Like this, compare with the present invention, the cost of its mechanical means and electric installation about 3 times to example of the present invention.
In the continuous annealing line of cold rolling calendering steel band, in the inlet/outlet side of annealing device apparatus of the present invention are set, carry out tension control.About the tension control of annealing device inlet side, be illustrated with the 11st figure.Steel band S is by the 1st take- up roll 7A and 7B, guide roller 9, buffer roll 37, guide roller the 9, the 2nd take- up roll 8A and 8B, and guide roller 9 enters in the not shown annealing device.Each take- up roll 7A, 7B, 8A, 8B are driven by drive- motor 38A, 38B, 39A, 39B respectively, and drive buffer roll 37 with drive-motor 18, thereby apply suitable tension force to steel band.
Act on the power F on the buffer roll 37, at intermediate tension T
mOne regularly, with inclined angle alpha, and tiltangle
1And θ
2Variation and change, this can utilize (2) formula to carry out the tension force correction.This F in tension force setting apparatus 56 input tension controllers 52, is set the moment of torsion of torque motor 18 thus.
F＝T
mcosα（Sinθ
1+Sinθ
2） （2）
F: act on the power on the buffer roll 37,
T
m: the tension force (intermediate tension) at buffer roll 37 places.
As inlet side tension force T
1Become T
1During+△ T, intermediate tension also becomes T
m+ △ T detects it with tension force analyzer 41, the motivating force of control torque motor 18 moves up and down buffer roll then, absorbs the tensile change thus.When this control can not be followed the tracks of the tension change of high frequency, use balance tension T
mMoment of torsion the buffer roll 37 that is pressed on the steel band is moved up and down, absorb tensile change thus.
18 places are provided with angle analyzer 19 at torque motor, inlet side tension force T
1Change as above-mentioned, moves up and down buffer roll 37, detects the rotational angle of torque motor 18, adjusts the slewing circle roll surface speed of the 1st take- up roll 7A and 7B, makes the position of buffer roll 37 revert to the home position.At last, will feed back for target location set(ting)value (angle on target) 54 with the buffer roll arm angle [alpha] that angle analyzer 19 detects and obtain the adjustment deviation, this deviation will be converted into speed value at positioner 53.This speed value is added in the interior Velocity Reference 57 of stove, in speed command input speed controller 49.Utilize this speed command control the 1st take-up roll 7A, the 7B drive-motor 38A that uses, rotating speed of 38B, thus arm angle α is controlled to angle on target.
The 57th, Velocity Reference value in the stove, speed in the stove of input regulation in the speed controller 50 of the speed controller 49 of the 1st take- up roll 7A, 7B and the 2nd take- up roll 8A, 8B.
In such control mode of the present invention, form by two control systems, one is the tension force analyzer 41 that the 1st take-up roll inlet side is provided with for tension change, another is buffer roll 37, the 2 take- up roll 8A, 8B and tension force analyzer 42.And the position control system that moves up and down use angle analyzer 19 of corresponding buffer roll 37 and control mode of the prior art are relatively, high responsiveness is not only arranged, and can control the tension force of steel band S accurately.
Since this buffer roll be low inertia for the non-absorbent tension change of above-mentioned tension control system, buffer roll is moved up and down, also can absorb tension change.
In passing, in the time of will simulating comparison with control mode control tensile effect of the prior art and the present invention, obtain following result.
As the precondition of analyzing is in the tension force actual value (opening the value of analyzer 42) of back take-up roll outlet side when the additional 90 kilograms of tension changes of leading portion take-up roll inlet side.
The tension change value of the 1st each control mode of table
| Mode of the present invention | Existing A mode | Existing |
| 200 |
300 newton | 430 newton |
As known from Table 1, mode of the present invention and existing mode relatively are best.
As described above such, tenslator of the present invention has adopted the buffer roll of extremely low inertia, this buffer roll is applied in the tinuous production of thin steel band continuous annealing line etc., steel band, when sending at a high speed thin steel band to, even when inlet side equipment and outlet side equipment etc. produce the tension change of high frequency, can not be delivered to annealing yet and wait on the treatment facility, can send steel band to, can prevent steel band generation warpage reliably and abrade cut with suitable tension stability ground.It is narrow that the space is set, and also can be arranged on optimal position at an easy rate in existing production line.
And, in steel band continuous annealing furnace with heating zone, soaking zone, primary cooling zone, overaging district, secondary cooling zone, adopt apparatus of the present invention, because take-up roll in the stove is set between overaging district and secondary cooling zone, therefore can adjust the overaging district independently reached the later steel band tension force of secondary cooling zone in the past.Like this, the warpage that can prevent to cause in the overaging district by too high tension force, can prevent reliably that steel band from contacting the scratch cut that produces steel band with the gas injection water cooler and immerse the steel band trace trace that causes between roller and the steel band at water-cooling groove water.
Therefore, adopt and the present invention does not worry can producing warpage, scratch cut and vestige as prior art, the feed rate of steel band is reduced, apparatus of the present invention can keep high productivity and improve the quality of products.And, being attached to the take-up roll in the stove, its apparatus structure is simple, and fabrication cost and maintenance cost are also cheap.
Claims (6)
1, the continuous annealer of steel band, in the continuous annealing furnace of steel band, it is characterized in that: take-up roll in the stove is set between overaging district and secondary cooling zone, utilizes take-up roll in this stove to make the steel band tension force of inlet side reduce, utilize that take-up roll improves the steel band tension force of outlet side in this stove with heating zone, soaking zone, primary cooling zone, overaging district, secondary cooling zone.
2, the tenslator of steel band, in the tinuous production of steel band, near inlet side and/or near outlet side take-up roll outside one group of relative stove is set at treatment facility, it is characterized in that, the 1st take-up roll and the 2nd take-up roll are set to be reached and the buffer roll of being abutted against mutually by the steel band between this two roller, the tension variation of this buffer roll and this steel band is corresponding, and can be connected this buffer roll before and after the cross one another direction rotation of line of span of take-up roll move the arm by controlling this buffer roll and the tension force of the angle adjustment steel band of span line.
3, the tenslator of the steel band of putting down in writing as claim 2 is characterized in that the angle α of buffer roll arm and span line is in the expression (1) of following F, and α is a F maximum value, and its border is 0 °＜α≤α
0Perhaps α
0≤ α＜90 ° utilize α are controlled at the tension force of adjusting steel band in the above-mentioned limit,
F=T
Mcos α｛sin(tan
-1(R′sin α)/(L
1) ) + sin(tan
-1(R′sinα)/(L
2) ) (1)
Wherein: R '=R (b)/(sin α)
L
1=a - c ()/() (b)/(tanα) , L
2= c + (b)/(tan α)
A: buffer roll arm fulcrum,
B: span links to the distance of fulcrum,
C: fulcrum to the 2 take-up roll inlet side roll gaps,
α: the angle of buffer roll arm and span line,
R: the buffer roll brachium,
A: the distance between the 1st take-up roll outlet side roller (or guide roller) and the 2nd take-up roll inlet side roller (or guide roller),
T
m: the tension force of steel band,
F: by steel band tension force T
mAct on the power on the buffer roll.
4, the continuous annealer of steel band, in the continuous annealing furnace of steel band, it is characterized in that, sending to of overaging district and secondary cooling zone take-up roll in the stove is set between the steel band space, also at the inlet side and/or the outlet side of this continuous annealing furnace, take-up roll and the tenslator that is abutted against the steel band that constitutes by buffer roll and steel band is set between them outside at least one group of relative stove.
5, the tenslator of the steel band of putting down in writing as one of claim 2 to 4 is characterized in that: but the axle free rotary ground supporting of buffer roll be fixed on the arm of supporting axis, be provided with and drive the torque motor that this supporting axis rotates.
6, the steel band tenslator of putting down in writing as claim 5 is characterized in that, damper weight is set on supporting axis.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32378/94 | 1994-03-02 | ||
| JP32379/94 | 1994-03-02 | ||
| JP3237894 | 1994-03-02 | ||
| JP32378/1994 | 1994-03-02 | ||
| JP32379/1994 | 1994-03-02 | ||
| JP3237994 | 1994-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1107764A true CN1107764A (en) | 1995-09-06 |
| CN1065000C CN1065000C (en) | 2001-04-25 |
Family
ID=26370938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN941055663A Expired - Lifetime CN1065000C (en) | 1994-03-02 | 1994-04-20 | Continuous annealing apparatus of steel strip and tension control system for the same |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP0675207B1 (en) |
| KR (1) | KR960016462B1 (en) |
| CN (1) | CN1065000C (en) |
| DE (2) | DE69431134T2 (en) |
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| CN100379886C (en) * | 2001-04-02 | 2008-04-09 | 新日本制铁株式社会 | Rapid cooling device for steel band in continuous annealing equipment |
| CN100447261C (en) * | 2006-09-22 | 2008-12-31 | 蔡满芝 | Continuous annealing furnace to utilize afterheat of strip steel in the same casing |
| CN102154543A (en) * | 2010-02-11 | 2011-08-17 | 上海宝钢工业检测公司 | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace |
| CN102553943A (en) * | 2012-01-13 | 2012-07-11 | 中冶南方（武汉）自动化有限公司 | Method for controlling helper rolls of loop for carbon steel continuous annealing unit |
| CN103008343A (en) * | 2012-12-18 | 2013-04-03 | 江苏三环实业股份有限公司 | Continuous mill |
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| CH539120A (en) * | 1970-09-11 | 1973-07-15 | Alusuisse | Process for the continuous production of metal strips with uniform strength values by annealing in a continuous furnace and subsequent stretching |
| DE2356009C3 (en) * | 1973-11-09 | 1982-02-04 | Agfa-Gevaert Ag, 5090 Leverkusen | Device for setting and measuring web tension |
| JPS5942733B2 (en) * | 1979-10-31 | 1984-10-17 | 川崎製鉄株式会社 | Steel strip continuous annealing equipment |
| JPS607693B2 (en) * | 1979-10-31 | 1985-02-26 | 川崎製鉄株式会社 | Continuous annealing method for steel strip |
| JPS5943979B2 (en) * | 1979-10-31 | 1984-10-25 | 川崎製鉄株式会社 | Furnace tension control method |
| US4307591A (en) * | 1980-03-31 | 1981-12-29 | Westinghouse Electric Corp. | Rolling mill looper control system |
| JPS6123512A (en) * | 1984-07-12 | 1986-02-01 | Toshiba Corp | Method and device for controlling tension between rolling mill stands |
| US5174835A (en) * | 1989-11-22 | 1992-12-29 | Selas Corporation Of America | Method of strip elongation control in continuous annealing furnaces |
| CA2074434C (en) * | 1992-07-22 | 1997-04-15 | Yasuo Ichii | Strip tension control apparatus |
-
1994
- 1994-04-19 DE DE1994631134 patent/DE69431134T2/en not_active Expired - Lifetime
- 1994-04-19 EP EP19940106061 patent/EP0675207B1/en not_active Expired - Lifetime
- 1994-04-19 DE DE1994621378 patent/DE69421378T2/en not_active Expired - Lifetime
- 1994-04-19 EP EP99102800A patent/EP0936275B1/en not_active Expired - Lifetime
- 1994-04-19 KR KR1019940008248A patent/KR960016462B1/en not_active IP Right Cessation
- 1994-04-20 CN CN941055663A patent/CN1065000C/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379886C (en) * | 2001-04-02 | 2008-04-09 | 新日本制铁株式社会 | Rapid cooling device for steel band in continuous annealing equipment |
| CN100447261C (en) * | 2006-09-22 | 2008-12-31 | 蔡满芝 | Continuous annealing furnace to utilize afterheat of strip steel in the same casing |
| CN102154543B (en) * | 2010-02-11 | 2014-06-11 | 上海宝钢工业检测公司 | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace |
| CN102154543A (en) * | 2010-02-11 | 2011-08-17 | 上海宝钢工业检测公司 | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace |
| CN102553943B (en) * | 2012-01-13 | 2014-11-19 | 中冶南方（武汉）自动化有限公司 | Method for controlling helper rolls of loop for carbon steel continuous annealing unit |
| CN102553943A (en) * | 2012-01-13 | 2012-07-11 | 中冶南方（武汉）自动化有限公司 | Method for controlling helper rolls of loop for carbon steel continuous annealing unit |
| CN103008343A (en) * | 2012-12-18 | 2013-04-03 | 江苏三环实业股份有限公司 | Continuous mill |
| CN103008343B (en) * | 2012-12-18 | 2015-12-23 | 江苏三环实业股份有限公司 | A kind of tandem mill |
| CN111868272A (en) * | 2018-03-20 | 2020-10-30 | 日本制铁株式会社 | Method for producing grain-oriented electrical steel sheet, and grain-oriented electrical steel sheet |
| CN111868272B (en) * | 2018-03-20 | 2022-11-15 | 日本制铁株式会社 | Method for producing grain-oriented electrical steel sheet, and grain-oriented electrical steel sheet |
| CN113798981A (en) * | 2021-08-30 | 2021-12-17 | 马钢(合肥)板材有限责任公司 | Method for quickly eliminating furnace roller surface nodules |
| CN113714309A (en) * | 2021-09-18 | 2021-11-30 | 北京首钢自动化信息技术有限公司 | Strip steel jitter elimination device and elimination method |
| CN113714309B (en) * | 2021-09-18 | 2023-05-02 | 北京首钢自动化信息技术有限公司 | Strip steel jitter eliminating device and eliminating method |
| WO2023151249A1 (en) * | 2022-02-10 | 2023-08-17 | 中冶南方工程技术有限公司 | Online measurement system for surface cleanliness of cold-rolled strip steel |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0936275A1 (en) | 1999-08-18 |
| CN1065000C (en) | 2001-04-25 |
| EP0936275B1 (en) | 2002-07-31 |
| DE69421378D1 (en) | 1999-12-02 |
| DE69431134T2 (en) | 2002-12-12 |
| DE69421378T2 (en) | 2000-05-11 |
| KR960016462B1 (en) | 1996-12-12 |
| EP0675207A1 (en) | 1995-10-04 |
| EP0675207B1 (en) | 1999-10-27 |
| DE69431134D1 (en) | 2002-09-05 |
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