CN104416135A - Roll gap calibration method for lightly pressing down tension leveler in square billet continuous casting - Google Patents
Roll gap calibration method for lightly pressing down tension leveler in square billet continuous casting Download PDFInfo
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- CN104416135A CN104416135A CN201310391254.6A CN201310391254A CN104416135A CN 104416135 A CN104416135 A CN 104416135A CN 201310391254 A CN201310391254 A CN 201310391254A CN 104416135 A CN104416135 A CN 104416135A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands
Abstract
Disclosed is a roll gap calibration method for lightly pressing down a tension leveler in square billet continuous casting. The roll gap calibration method for lightly pressing down the tension leveler in the square billet continuous casting includes: a, selecting a standard chain pole as a calibrator, and setting a calibration reference value which comprises calibration pressure values and a calibration thickness value; b, starting the calibrator to complete a calibration motion, and reading and recording an actual detection value; c, calculating a deviation value according to the calibration reference value and the actual detection value, and performing correction and compensation according to the deviation value, wherein the calibration pressure values in the step a are respectively a minimum pressure value and a maximum pressure value, a pressure interval value is constituted by the minimum pressure value and the maximum pressure value, and the correction and the compensation in the step c are performed according to a two point linearity correction algorithm, and confirmed according to a linear function relationship between pressure and the thickness. The roll gap calibration method for lightly pressing down the tension leveler in the square billet continuous casting is achieved by using the multiple segment calibrator to achieve positioning once and automatically calibrating the pressure of multiple points, improves roll gap calibration accuracy when the tension leveler is pressed down in the square billet continuous casting, shortens calibration time, and improves calibration efficiency.
Description
Technical field
The invention belongs to continuous casting in iron and steel production to control and detection technique field, be specifically related to a kind of tension leveler roller seam scaling method at billet continuous casting slighter compress.
Background technology
In field of steel production, billet caster is mainly for the production of the wire rod of high-quality, high-grade, high added value, high-alloy steel pipe and the raw material such as bearing steel, bar base material.In order to control the Inner Quality of Billet defect such as incidental center segregation and center porosity in billet continuous casting production, soft reduction technique is adopted to be the most effective technology controlling and process means.Soft reduction technique refers to by applying even external force in liquid core of continuous casting billet end region, forms certain decrement to compensate the solidification shrinkage amount of strand.This can eliminate or reduce strand on the one hand and shrink the internal voids formed, and prevents the molten steel of intergranular solute from flowing to strand central cross; On the other hand, the squeezing action that slighter compress produces can also impel the molten steel of solute in liquid core along throwing direction reverse flow, solute element is redistributed in molten steel, thus makes the solidified structure even compact more of strand, reach the object improved center segregation and reduce center porosity.
Soft reduction control technology has two crucial controlled quentity controlled variables, and one is depressing position, namely along steel stream casting direction, finds suitable solidification end to implement slighter compress; Another is exactly drafts, the amounts of thickness variation after being namely squeezed containing liquid core strand.The drafts of billet caster controls to be implemented by withdrawal straightening machine, and Fig. 1 is typical billet caster withdrawal straightening machine configuration schematic diagram, and in figure, every platform withdrawal straightening machine is made up of a pair up-down rollers, and wherein lower roll is fixed bearing roller, and roller can only passively rotate, and can not be elevated; Top roll is lifting driven roller, the rotation of top roll is driven by motor, the lifting of top roll is controlled by the hydraulic cylinder be connected with top roll roll stand, all with displacement detecting sensor on every platform hydraulic cylinder, for detecting the displacement of hydraulic cylinder piston rod, because hydraulic cylinder piston rod and top roll are for be mechanically connected, the change in displacement of top roll therefore can be detected by displacement detector; Because lower roll lifting position is fixed, therefore by detecting the change in displacement of top roll in real time, the change of roll gap between withdrawal straightening machine up-down rollers just can be obtained in real time.In billet caster slighter compress technique, the drafts of each pressure point is generally several millimeter, therefore very high to the required precision of drafts control, control due to drafts is actually the control to tension leveler roller seam, and therefore high-precision gap preset determines the technology controlling and process effect of slighter compress.
In gap preset, the precision that tension leveler roller seam detects determines the precision of whole slighter compress process gap preset.And the precision that roll gap detects is directly related with the roll gap calibration method of withdrawal straightening machine.Roll gap calibration carries out calibration and compensation to the departure between displacement transducer detected value and actual gap values between rollers.Because the zero-bit of upper roller oil cylinder displacement transducer is different with the zero-bit of tension leveler roller seam, the mode by demarcating therefore is needed to carry out the correction of roll gap detection limit.Simultaneously, because the difference in each withdrawal straightening machine up-down rollers position, oil cylinder, displacement transducer assembling is different with gap, and the difference that the roll surface wearing in using changes, each withdrawal straightening machine cannot carry out the correction of roll gap detection limit by unified departure, need to demarcate respectively every platform withdrawal straightening machine, control system just can be made to obtain every platform withdrawal straightening machine roll gap detection limit accurately.
Existing tension leveler roller seam demarcates the main dummy bar that adopts as calibration device, and employing is single point pressure standardization, and calibration process mainly comprises:
1) select the chain link of some chain links as standard thickness of dummy bar, it is standard thickness T that the thickness of this chain link has measured postscript in advance
std, be input to the benchmark as roll gap calibration in system;
2) be transported in withdrawal straightening machine by dummy bar roller-way, the position of adjustment dummy bar, makes standard link be positioned in the middle of a withdrawal straightening machine up-down rollers to be calibrated;
3) after having located, start the demarcation of this withdrawal straightening machine, withdrawal straightening machine press down system is according to the roll gap calibration pressure P preset
s(Baosteel large square bland continuous-casting machine is set as P
s=10 tons), depress the top roll of this withdrawal straightening machine;
4) after the top roll of withdrawal straightening machine touches the upper surface of dummy bar standard link, actual pressure P
iareach nominal pressure, now system reads the upper original detected value T of roller oil cylinder displacement transducer
0, and calculate T
0with standard thickness T
stdbetween deviation delta T: Δ T=T
0-T
std; The compensation rate that this deviation detects as No. i-th tension leveler roller seam is preserved in systems in which;
5), after determining compensation rate, T is passed through
1=T
0-Δ T, to the actual roll gap detection limit T of this withdrawal straightening machine
1carry out rectification building-out, make roll gap detection limit consistent with true roll gap size;
6) the 2nd is repeated to other withdrawal straightening machine of same flow) ~ 5) process of step, complete the roll gap calibration process of all withdrawal straightening machines of whole stream.
There is following problem in existing roll gap calibration method:
1) nominal time is long, and efficiency is low.
Billet caster is all adopt dummy bar as calibration device at present, because the thickness forming each chain link of dummy bar exists little bit different, therefore, all need to demarcate by predetermined standard link at every turn, timing signal is carried out at every platform withdrawal straightening machine like this with regard to needs, all will by starting rollgang, in the middle of the up-down rollers standard link of dummy bar being positioned at this withdrawal straightening machine.The withdrawal straightening machine quantity of billet caster is generally many (for Baosteel large square bland continuous-casting machine, often stream has 9 withdrawal straightening machines), owing to dummy bar only having the chain link of a joint standard thickness, if demarcate multiple stage withdrawal straightening machine, need manually to adjust location under every platform withdrawal straightening machine, and every platform withdrawal straightening machine timing signal all needs again to wait for that top roll declines with the crimping completing same link surface, therefore for the operation that many withdrawal straightening machines are demarcated, need at least two operating personnel to cooperatively interact just can complete, calibration process length consuming time, efficiency is low.
2) calibrated error is large, and precision is low.
What existing scaling method adopted is that single point pressure is demarcated, and the top roll depressing force set by timing signal is lower, and roll gap detected value completes calibration and compensation under this low pressure.But in actual production, the depressing force that the withdrawal straightening machine of different depressing position and different drafts is used when slighter compress is different, for Baosteel large square bland continuous-casting machine, its excursion can between 20 ~ 140 tons; Found by test, withdrawal straightening machine is due to the elastic deformation of mechanical component and gap crowding-out effect, after carrying out low pressure demarcation, obvious deviation can be there is in same calibration device roll gap detection limit under high pressure, for Baosteel large square bland continuous-casting machine, roll gap calibration precision under high pressure and low pressure is maximum can reach 2mm, and this deviation is existing scaling method cannot detect and compensate, for the slighter compress technique only having several millimeters of drafts, this is the error of can not ignore, and directly can have influence on the slighter compress technological effect of high-grade steel grade.
Through retrieval and inquiry, the roll gap calibration method of current domestic and international published billet continuous casting slighter compress withdrawal straightening machine is adopt dummy bar or roll gap measuring instrument equipment substantially, and wherein roll gap measuring instrument is difficult to use on the closely spaced multithread billet caster of this stream.In addition, published related invention also comprises:
(1) control method for pulling-straightening roller gap under light pressure of bloom caster on-line proving, Application Number (patent) CN200910011679.3, this invention utilizes the function realizing its on-line proving at the average thickness watering strand as roll gap benchmark.But owing to can there is the uncertain deformation behaviors such as contraction, bulge in the moving process of strand in withdrawal straightening machine, therefore its stated accuracy is difficult to ensure.
(2) for the roll gap calibrating system of billet continuous casting withdrawal straightening machine, Application Number (patent) CN201020684938.7, this utility model provides a kind of roll gap calibrating system for billet continuous casting withdrawal straightening machine, this system is still and adopts the single standard link of dummy bar as calibration device, standard link adopts reflective surface be convenient to identify location.But for how to shorten the nominal time and improve stated accuracy, this technical scheme lacks corresponding description.
Summary of the invention
For improving the roll gap calibration precision of the withdrawal straightening machine of billet continuous casting slighter compress, reduce the nominal time, improve and demarcate efficiency, the invention provides a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine, technical scheme of the present invention is as follows:
In a roll gap calibration method for billet caster slighter compress withdrawal straightening machine, comprise
A: selection standard chain bar is as calibration device, and set reference-calibrating value, described reference-calibrating value comprises nominal pressure value and nominal thickness value;
B: start calibration device and complete demarcation action, read and record actual detected value;
C: according to reference-calibrating value and actual detected value calculation deviation value, carry out calibration and compensation according to deviate;
It is characterized in that:
In step a, described nominal pressure value is set as two values, and one is minimal pressure force value, and one is maximal pressure force value, and two described nominal pressure values form a pressure range value,
In step c, described calibration and compensation, according to two point Linear Correction algorithms, is determined by the linear functional relation between pressure and thickness.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: the linear functional relation between described pressure and thickness is: T1=T0-[Δ T1+K1(Pa-P1)],
Wherein, T0 represents the original detection limit of withdrawal straightening machine oil cylinder displacement transducer;
Δ T1 represents the deviation compensation amount that timing signal first pressure spot generates;
K1 represents that two point pressures demarcate the pressure variable coefficient generated;
Pa represents actual withdrawal straightening machine depressing force;
P1 represents first nominal pressure.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: in described pressure range value, set multiple nominal pressure point, choosing two the nominal pressure points adjacent with actual detected value left and right is the nominal pressure value participating in calculating.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: described K1=(Δ T2-Δ T1)/(P2-P1),
Described Δ T1=T0-1-Tstd,
Described Δ T2=T0-2-Tstd,
Wherein, described Tstd represents nominal thickness value,
Described P2 represents second nominal pressure,
Described T0-1 represents the actual (real) thickness detected value under P1 pressure,
Described T0-2 represents the actual (real) thickness detected value under P2 pressure.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: the chain link of described chain bar is chosen multiple, and the thickness of each chain link is equal.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: the joint number of described chain link is more than or equal to the number of units of withdrawal straightening machine.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: the pitch between each described chain link equals the centre-to-centre spacing of adjacent two withdrawal straightening machines.
According to a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, it is characterized in that: the thickness of each described chain link equals the thickness of strand.
For the device that billet caster slighter compress tension leveler roller seam is demarcated, comprise and be arranged at chain bar in withdrawal straightening machine and be arranged at outside for detecting and carrying out the control module of rectification building-out deviate, it is characterized in that:
Described chain bar is arranged between the up-down rollers of withdrawal straightening machine, is made up of the chain link of more piece uniform thickness, and the pitch of each chain link equals the centre-to-centre spacing of adjacent two withdrawal straightening machines,
It is described for detect and the control module of carrying out rectification building-out deviate comprises detection part and digital independent and calculating unit,
Described detection part is be installed on the sensor on each withdrawal straightening machine,
The data that described reading and calculating unit transmit according to detection part calculate according to two-point calibration linearity correction algorithm, complete rectification building-out.
Advantage of the present invention is:
1. can realize very high stated accuracy, the roll gap calibration precision under different pressures can reach 0.1mm;
2. once can complete calibration device and often flow the location under all withdrawal straightening machines, the roll gap calibration often flowing all withdrawal straightening machines can be started simultaneously, demarcate operating personnel and can reduce to 1 people from least 2 people, greatly save the time of demarcation, improve demarcation efficiency.
3. can improve gap preset precision, improve slighter compress control effects.
Accompanying drawing explanation
Fig. 1 is control method flow chart of the present invention;
Fig. 2 is that the more piece calibration device in the present invention demarcates schematic diagram;
Fig. 3 is the more piece chain rod-type calibration device schematic diagram in the present invention.
In figure, 1 is calibration device overall length L; 2 is chain link thickness L1; 3 is chain link pitch L2; 4 is zip length L3.
Detailed description of the invention
Below, according to specification drawings and specific embodiments, a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention is further described in detail.
As shown in Figure 1, 2, 3, the particular content of technical solution of the present invention is described below:
1. adopt multi-section type calibration device as the roll gap benchmark of timing signal
A. adopt multi-section type uniform thickness chain bar as calibration device; The total length L of chain bar must be greater than the interval span often flowing withdrawal straightening stands; Chain bar is made up of the chain link of more piece uniform thickness; The joint number of chain bar needs to be more than or equal to the number of units often flowing withdrawal straightening machine; The thickness L1 of chain bar needs in tension leveler roller seam detection range, preferably close to the thickness producing strand, is conducive to the nonlinearity erron reducing roll gap detection; The pitch L2 of chain bar needs consistent with the centre-to-centre spacing of adjacent two withdrawal straightening machines, can ensure that the center of each chain link can between the up-down rollers of every platform withdrawal straightening machine when locating like this, avoid the up-down rollers of withdrawal straightening machine to be clipped on the hinge area of chain link, affect the accuracy of timing signal roll gap benchmark; The material of chain link needs to ensure can not produce deformation under nominal pressure.
B. using demarcating the thickness of chain bar as standard thickness Tstd, the benchmark as roll gap calibration in system is input to;
2. calibration device roller-way is transported in withdrawal straightening machine, makes the center of each chain link of calibration device be positioned between the up-down rollers of each withdrawal straightening machine; Complete the positioning work of calibration device under all withdrawal straightening machines of same flow with regard to disposable like this, eliminate the time loss of resetting under multiple stage withdrawal straightening machine.
3., after calibration device has been located, multipoint pressure automatic Calibration process can be entered by one-shot multiple stage withdrawal straightening machine;
A. multiple nominal pressure point is set in advance in systems in which, nominal pressure point should set more than 2, the minimum pressure that lowest bid constant-pressure can be pressed onto on strand according to withdrawal straightening machine during gap preset is determined, the maximum pressure that the highest nominal pressure can be pressed onto on strand according to withdrawal straightening machine during gap preset is determined;
B. demarcate after starting, withdrawal straightening machine top roll declines, nominal pressure Ps=P1, and withdrawal straightening machine press down system, from minimum nominal pressure point P1, controls the depressing force of withdrawal straightening machine top roll;
C. when the actual pressure detected meets: P1-Δ P≤Pa≤P1+ Δ P, and after stably remaining on this scope, system calculates between displacement transducer original detected value T0-1 and standard thickness Tstd now deviation delta T1: Δ T1=T0-1-Tstd automatically; And Δ T1 is preserved in systems in which as compensation rate 1;
D. then, nominal pressure Ps automatically switches to P2, and withdrawal straightening machine press down system selects the 2nd nominal pressure point P2, regulates the depressing force of withdrawal straightening machine top roll;
E. when the actual pressure detected meets: P2-Δ P≤Pa≤P2+ Δ P, wherein Δ P is the range of pressure fluctuations allowed, and after stably remaining on this scope, system calculates between displacement transducer original detected value T0-2 and standard thickness Tstd now deviation delta T2: Δ T2=T0-2-Tstd automatically; And Δ T2 is preserved in systems in which as compensation rate 2;
If f. nominal pressure point is greater than 2, can repeat d) and step e), the compensation rate completing all nominal pressures point calculates;
G. when the compensation rate of all nominal pressure points has all been measured complete, system starts to calculate pressure variable coefficient K automatically.Demarcate according to two point pressures, then K1=(Δ T2-Δ T1)/(P2-P1); If adopt the pressure calibration of more than 2, then can produce different pressure variable coefficients according to different pressures Concourse Division, K1=(Δ T2-Δ T1)/(P2-P1), K2=(Δ T3-Δ T2)/(P3-P2);
H. the compensation rate utilizing multipoint pressure timing signal to generate and pressure variable coefficient, complete the compensation to the original detection limit of different pressures lower sensor, make actual roll gap detected value can obtain the result consistent with the standard thickness of calibration device at various pressures, thus the roll gap metrical error under the flat different pressures that disappears.
Demarcate according to two point pressures, calibrated tension leveler roller seam detected value can be determined with following formula:
T1=T0－[ΔT1＋K1（Pa－P1）]，
The original detection limit of T0-withdrawal straightening machine oil cylinder displacement transducer;
The deviation compensation amount that Δ T1-timing signal first pressure spot generates;
K1-two point pressure demarcates the pressure variable coefficient generated;
The withdrawal straightening machine depressing force of the current reality of Pa-;
P1-first nominal pressure;
According to pressure calibration o'clock more than 2 o'clock, then calibrated tension leveler roller seam detected value can be calculated as follows:
If actual pressure is: P1≤Pa < P2,
Then T1=T0-[Δ T1+K1(Pa-P1)];
If actual pressure is: P2≤Pa < P3,
Then T1=T0-[Δ T2+K2(Pa-P2)];
By that analogy.
Specific embodiment:
Withdrawal straightening machine quantity: 9, withdrawal straightening machine spacing: 1.1m
(1) more piece chain-bar type calibration device is adopted
Calibration device chain bar joint number: 9 joints;
Calibration device chain bar total length: 10.3m
Calibration device chain bar thickness: 320mm;
Calibration device chain bar pitch: 1.1m;
Calibration device chain pole stock matter: 40GrMo4;
The standard thickness T of systemic presupposition
std=320mm;
(2) calibration device roller-way is transported in withdrawal straightening machine, makes the center of each chain link of calibration device be positioned between the up-down rollers of each withdrawal straightening machine;
(3), after calibration device has been located, one-shot 9 withdrawal straightening machines enter multipoint pressure automatic Calibration process;
A) nominal pressure point: P
1=10 tons, P
2=110 tons;
B), after demarcation starts, withdrawal straightening machine top roll declines, nominal pressure P
s=P
1=10 tons, range of pressure fluctuations Δ P=1 ton;
C) as actual pressure P
aafter being stabilized in 9 ~ 11 tons, the original detected value T of roll gap
0-1=328mm, compensation rate Δ T
1=T
0-1-T
std=328-320=8mm;
D) then nominal pressure P
s=P
2=110 tons;
E) as actual pressure P
aafter being stabilized in 109 ~ 111 tons, the original detected value T of roll gap
0-2=326mm, compensation rate Δ T
2=T
0-2-T
std=326-320=6mm;
F) pressure variable coefficient K is calculated
1=(Δ T
2-Δ T
1)/(P
2-P
1)=(6-8)/(110-10)=-0.02;
G) calibrated tension leveler roller seam detected value is:
If withdrawal straightening machine depressing force: P
a=10 tons, now T
0=328mm,
Then T
1=T
0-[Δ T
1+ K
1(P
a-P
1)]=328-[8+ (-0.02) (10-10)]=320
If withdrawal straightening machine depressing force: P
a=60 tons, now T
0=327mm,
Then T
1=T
0-[Δ T
1+ K
1(P
a-P
1)]=327-[8+ (-0.02) (60-10)]=320
If withdrawal straightening machine depressing force: P
a=110 tons, now T
0=326mm,
Then T
1=T
0-[Δ T
1+ K
1(P
a-P
1)]=326-[8+ (-0.02) (110-10)]=320
Thus roll gap detected value under making different pressures and the true roll gap of reality are consistent.
A kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine of the present invention, can realize very high stated accuracy, the roll gap calibration precision under different pressures can reach 0.1mm; Once can complete calibration device and often flow the location under all withdrawal straightening machines, the roll gap calibration often flowing all withdrawal straightening machines can be started simultaneously, demarcate operating personnel and can reduce to 1 people from least 2 people, greatly save the time of demarcation, improve demarcation efficiency.Gap preset precision can be improved, improve slighter compress control effects.
Claims (9)
1., in a roll gap calibration method for billet caster slighter compress withdrawal straightening machine, comprise
A: selection standard chain bar is as calibration device, and set reference-calibrating value, described reference-calibrating value comprises nominal pressure value and nominal thickness value;
B: start calibration device and complete demarcation action, read and record actual detected value;
C: according to reference-calibrating value and actual detected value calculation deviation value, carry out calibration and compensation according to deviate;
It is characterized in that:
In step a, described nominal pressure value is set as two values, and one is minimal pressure force value, and one is maximal pressure force value, and two described nominal pressure values form a pressure range value,
In step c, described calibration and compensation, according to two point Linear Correction algorithms, is determined by the linear functional relation between pressure and thickness.
2. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 1, is characterized in that: the linear functional relation between described pressure and thickness is: T1=T0-[Δ T1+K1(Pa-P1)],
Wherein, T0 represents the original detection limit of withdrawal straightening machine oil cylinder displacement transducer;
Δ T1 represents the deviation compensation amount that timing signal first pressure spot generates;
K1 represents that two point pressures demarcate the pressure variable coefficient generated;
Pa represents actual withdrawal straightening machine depressing force;
P1 represents first nominal pressure.
3. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 1, it is characterized in that: in described pressure range value, set multiple nominal pressure point, choosing two the nominal pressure points adjacent with actual detected value left and right is the nominal pressure value participating in calculating.
4. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 2, is characterized in that: described K1=(Δ T2-Δ T1)/(P2-P1),
Described Δ T1=T0-1-Tstd,
Described Δ T2=T0-2-Tstd,
Wherein, described Tstd represents nominal thickness value,
Described P2 represents second nominal pressure,
Described T0-1 represents the actual (real) thickness detected value under P1 pressure,
Described T0-2 represents the actual (real) thickness detected value under P2 pressure.
5. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 1, is characterized in that: the chain link of described chain bar is chosen multiple, and the thickness of each chain link is equal.
6. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 5, is characterized in that: the joint number of described chain link is more than or equal to the number of units of withdrawal straightening machine.
7. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 5, is characterized in that: the pitch between each described chain link equals the centre-to-centre spacing of adjacent two withdrawal straightening machines.
8. a kind of roll gap calibration method at billet caster slighter compress withdrawal straightening machine according to claim 5, is characterized in that: the thickness of each described chain link equals the thickness of strand.
9., for the device that billet caster slighter compress tension leveler roller seam is demarcated, comprise and be arranged at chain bar in withdrawal straightening machine and be arranged at outside for detecting and carrying out the control module of rectification building-out deviate, it is characterized in that:
Described chain bar is arranged between the up-down rollers of withdrawal straightening machine, is made up of the chain link of more piece uniform thickness, and the pitch of each chain link equals the centre-to-centre spacing of adjacent two withdrawal straightening machines,
It is described for detect and the control module of carrying out rectification building-out deviate comprises detection part and digital independent and calculating unit,
Described detection part is be installed on the sensor on each withdrawal straightening machine,
The data that described reading and calculating unit transmit according to detection part calculate according to two-point calibration linearity correction algorithm, complete rectification building-out.
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| CN114951578A (en) * | 2022-05-31 | 2022-08-30 | 北京高创智信冶金科技有限公司 | Soft reduction roll gap control method suitable for continuous casting square billet |
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| CN104972086B (en) * | 2015-06-25 | 2017-03-29 | 中冶连铸技术工程有限责任公司 | Withdrawal straightening machine detection method and device |
| CN106041010A (en) * | 2016-07-25 | 2016-10-26 | 江阴兴澄特种钢铁有限公司 | Soft reduction calibration method for continuous casting blooms |
| CN106041010B (en) * | 2016-07-25 | 2017-11-24 | 江阴兴澄特种钢铁有限公司 | A kind of continuous casting blooms slighter compress scaling method |
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| CN109434058A (en) * | 2018-12-29 | 2019-03-08 | 首钢集团有限公司 | A kind of scaling method of conventional slab caster roll gap |
| CN109434058B (en) * | 2018-12-29 | 2021-07-23 | 首钢集团有限公司 | Calibration method for roll gap of slab casting machine |
| CN111438342A (en) * | 2019-01-16 | 2020-07-24 | 宝山钢铁股份有限公司 | Online dual-purpose calibration method for roll gap of fan-shaped section of continuous casting machine |
| CN111438342B (en) * | 2019-01-16 | 2021-06-15 | 宝山钢铁股份有限公司 | Online dual-purpose calibration method for roll gap of fan-shaped section of continuous casting machine |
| CN110181016A (en) * | 2019-05-27 | 2019-08-30 | 北京首钢国际工程技术有限公司 | A kind of big pressure casting and rolling machine of the box-like heavy slab of 2+8 roller group |
| CN110181016B (en) * | 2019-05-27 | 2024-03-29 | 北京首钢国际工程技术有限公司 | 2+8 roller combined thick plate blank large-pressure casting and rolling machine |
| CN111112345A (en) * | 2019-12-25 | 2020-05-08 | 鞍钢集团自动化有限公司 | Control method for automatically compensating deviation generated by calibration of horizontal rolling mill |
| CN111331095A (en) * | 2020-03-09 | 2020-06-26 | 柳州钢铁股份有限公司 | Method for online sector section roll gap suspension calibration of slab caster |
| CN113084111A (en) * | 2021-03-25 | 2021-07-09 | 中天钢铁集团有限公司 | Method for correcting pressing precision of continuous casting withdrawal and straightening machine |
| CN114951578A (en) * | 2022-05-31 | 2022-08-30 | 北京高创智信冶金科技有限公司 | Soft reduction roll gap control method suitable for continuous casting square billet |
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