CN102172634B - Method for rolling welding line under automatic control - Google Patents
Method for rolling welding line under automatic control Download PDFInfo
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- CN102172634B CN102172634B CN 201010614776 CN201010614776A CN102172634B CN 102172634 B CN102172634 B CN 102172634B CN 201010614776 CN201010614776 CN 201010614776 CN 201010614776 A CN201010614776 A CN 201010614776A CN 102172634 B CN102172634 B CN 102172634B
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Abstract
The invention relates to the cold tandem rolling technology. The invention solves the problem that the thickness is seriously out of tolerance caused by the traditional manual control welding line thickening method and provides a method for rolling a welding line under automatic control. The technical scheme in the method can be summarized as follows: when the welding line passes through each rack, a gap between rollers and speeds of the rollers are changed by adopting an automatic control way, thus the welding line is thickened and the tensile force of strip steel is maintained to be constant. The method provided by the invention has the beneficial effects that the strip breakage rate of the welding line is reduced and the rate of finished products is improved, and the method is applicable to a cold tandem rolling machine set.
Description
Technical field
The present invention relates to the cold continuous rolling technology, particularly the technology of weld seam control in the cold continuous rolling.
Background technology
The weld seam broken belt is the common production accident of tandem mills; The weld seam broken belt not only directly influences the operating rate of unit and the lumber recovery of coil of strip; And be easy to cause the roller surface damage to increase quality risk; In order to reduce the weld seam broken belt baneful influence that production causes to tandem mills; Milling train main operation worker has to the weld seam of part specification and steel grade is taked necessary to thicken the unit tension that control measure are born when reducing weld seam through rolling-mill housing, and then reduces the weld seam broken belt rate, though this manually operated rolling mode or method are playing certain effect aspect the weld seam broken belt reducing; But its disadvantageous one side is the lumber recovery that has reduced coil of strip, often has 30～50 meters long serious thickness overproof (＞± 3%) end to end because the process weld seam thickens the coil of strip of control.Dynamic variable specification is that the important technology that the associating unit is realized continuity production and improved the coil of strip lumber recovery is rolled in acid; Become the specification process except that two pass schedules of coil of strip before and after the need; Also relate to an intermediate rolling table; Comprised roll gap, speed, advancing slip, the isoparametric intermediate settings value of bending roller force in this table, dynamic variable specification mainly is to realize through the synchronous modification to gantry speed, roll gap position, tension force reference and bending roller force.
Summary of the invention
The objective of the invention is to overcome present Artificial Control weld seam thickening method and cause the coil of strip overproof serious long partially shortcoming of thickness end to end, the method for the automatic controlled rolling of a kind of weld seam is provided.
The present invention solves its technical problem, and the technical scheme of employing is that the method for the automatic controlled rolling of weld seam is characterized in that, may further comprise the steps:
A. the rolling procedure of setting the weld seam front and back is respectively rules one and rules two, sets the weld seam control procedure and begins to finish to the B point from the A point, becomes the specification process and begins to guarantee that to the end of D point weld seam is between B, the C point from the C point, and the B point begins to distinguish for weldering control time-delay to the C point;
B. to number in order be 1～n number to frame;
C. calculate the required roll gap adjusting parameter and the speed regulation parameter of weld seam control of each frame respectively by the milling train setting model;
D. utilize weld joint tracking function butt welded seam position to detect, judge whether it reaches weldering control start-up point A point or become specification start-up point C point;
E. when the A point arrives the i frame; The roll gap position of i frame is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter; Change B point arrival i frame when accomplishing; During variation by the speed of rolls of the corresponding change of speed regulation parameter i frame guaranteeing the constant of forward pull, and by the speed of the frame at the corresponding change of the speed regulation parameter i frame upper reaches and inlet jockey pulley to guarantee the constant of backward pull, wherein i is the positive integer less than n;
F. when the C point arrives the i frame; Carry out dynamic variable specification; The weld seam control setting value that the roll gap position of i frame is regulated the parameter from roll gap becomes middle rules setting value, and the D point arrives the i frame when changing completion, if i-1 is not 0; Then the roll gap position of i-1 frame becomes the setting value of rules two from middle rules setting value; During variation by the speed of rolls of the corresponding change of speed regulation parameter i frame guaranteeing the constant of forward pull, between i-1 frame and i frame, set up the setting tension force of rules two by the speed of rolls of the corresponding change of speed regulation parameter i-1 frame, by constant with the assurance backward pull of the speed of the breast roller speed at the corresponding adjusting of the speed regulation parameter i-1 frame upper reaches and inlet jockey pulley; If i-1 is 0, then by the speed of the corresponding inlet jockey pulley of speed regulation parameter to guarantee the constant of backward pull;
G. judge whether i+1 equals n, if then get into next step, if not then make i=i+1 and get back to the e step;
H. when the A point arrives the n frame, the roll gap position of n frame is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter, change B point arrival n frame when accomplishing;
I. when the C point arrives the n frame; Carry out dynamic variable specification; The weld seam that the roll gap position of n frame is regulated the parameter from roll gap is controlled the setting value that setting value becomes rules two; D point arrives the n frame when change accomplishing, and between n-1 frame and n frame, is set up the setting tension force of rules two during variation by the speed of rolls of the corresponding adjusting of speed regulation parameter n-1 frame, by constant with the assurance backward pull of the speed of the speed regulation parameter corresponding adjusting 1～n-2 frame and the jockey pulley that enters the mouth;
J. after the D point passed through the n frame, the mill speed of the whole unit of adjusted in concert was to the mill speed of rules two.
Concrete, step c may further comprise the steps:
C1. set the roll gap thickness of 1～n frame; At first confirm the target thickness that weld seam needs after through the n-1 frame reach according to the rolling specs of current coil of strip and next coil of strip; Confirm that according to certain method of salary distribution of depressing weld seam passes through the roll gap thickness of 1～n-2 frame then; At last based on utilizing mill model to calculate the roll gap thickness of n frame when the weld seam principle that its strip steel at entry speed remains unchanged during through the n frame, middle rules setting value is calculated by the request instruction that prototype sends according to the one-level process control computer when the rolling fast end of a last coil automatically;
C2. calculate the advancing slip value of 1～n frame;
C3. calculate 1～n frame fixed value of roller slit;
C4. press second flow amount equal principle and set 1～n gantry speed setting value.
C5. the change specification speed limit value that after the rolling extension of process n-2 frame, can not be longer than the policy setting milling train of frame spacing according to AD section strip steel length.
Further, the distance of said A point of step a and weld seam confirms that by the change specification speed of accomplishing required time of implementation of roll gap and velocity variations and current milling train the A point should guarantee that the distance of B point and weld seam leaves certain safe distance after starting; The position that said C is ordered is the position that is arrived after the certain time-delay after weld seam passes through frame; Said D point position calculates CD section strip steel length and then definite D point position after being confirmed by C point position in the dynamic variable specification function of milling train.
Concrete, said certain time-delay is 0.5 second; Said certain safe distance is 0.2 meter.
Concrete, said each frame of step b is four frames, it is 1～No. 4 that frame numbers in order.
The invention has the beneficial effects as follows; Method through the automatic controlled rolling of above-mentioned weld seam; Merge technology and the experience of having utilized the existing weld joint tracking function of milling train, rolling model set-up function, dynamic variable specification function and Artificial Control weld seam; Utilize the method for control automatically to reach for Artificial Control weld seam thickening method; Aspect the overproof control of thickness remarkable advantages is being arranged, the thickness fluctuation that has not only increased the thickness of band steel welded seam area but also reduced simultaneously to cause because of front and back frame tension fluctuation has reached and has reduced weld seam broken belt rate and the purpose that improves yield rate.
The specific embodiment
Below in conjunction with embodiment, describe technical scheme of the present invention in detail.
The method of the automatic controlled rolling of weld seam according to the invention is: the rolling procedure of at first setting the weld seam front and back is respectively rules one and rules two, sets the weld seam control procedure and begins to finish to the B point from the A point, becomes the specification process and begins to finish to the D point from the C point; Guarantee that weld seam is between B, the C point, the B point begins to be weldering control time-delay district to the C point that then frame being numbered in order is 1～n number; Calculate the required roll gap adjusting parameter and the speed regulation parameter of weld seam control of each frame again by the milling train setting model respectively, utilize weld joint tracking function butt welded seam position to detect then, judge whether it reaches weldering control start-up point A point or become specification start-up point C point; When the A point arrives the i frame; The roll gap position of i frame is become roll gap from the setting value of rules one regulates the weld seam control setting value the parameter, change that B point arrives the i frame when accomplishing, during variation by constant with the assurance forward pull of the speed of rolls of the corresponding change of speed regulation parameter i frame; And by the speed of the frame at the corresponding change of the speed regulation parameter i frame upper reaches and inlet jockey pulley to guarantee the constant of backward pull; Wherein i is the positive integer less than n, when the C point arrives the i frame, carries out dynamic variable specification; The weld seam control setting value that the roll gap position of i frame is regulated the parameter from roll gap becomes middle rules setting value; Change D point arrival i frame when accomplishing, if i-1 is not 0, then the roll gap position of i-1 frame becomes the setting value of rules two from middle rules setting value; During variation by the speed of rolls of the corresponding change of speed regulation parameter i frame to guarantee the constant of forward pull; Between i-1 frame and i frame, setting up the setting tension force of rules two by the speed of rolls of the corresponding change of speed regulation parameter i-1 frame, to guarantee the constant of backward pull, is 0 as if i-1 by the speed of the breast roller speed at the corresponding adjusting of the speed regulation parameter i-1 frame upper reaches and inlet jockey pulley; Then by the speed of the corresponding inlet jockey pulley of speed regulation parameter to guarantee the constant of backward pull; Judge whether i+1 equals n, if not then make i=i+1 and get back to that step when the A point arrives the i frame, if then when the A point arrives the n frame; The roll gap position of n frame is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter; Change B point arrival n frame when accomplishing, when the C point arrives the n frame, carry out dynamic variable specification; The weld seam that the roll gap position of n frame is regulated the parameter from roll gap is controlled the setting value that setting value becomes rules two; D point arrives the n frame when change accomplishing, and between n-1 frame and n frame, is set up the setting tension force of rules two during variation by the speed of rolls of the corresponding adjusting of speed regulation parameter n-1 frame, by constant with the assurance backward pull of the speed of the speed regulation parameter corresponding adjusting 1～n-2 frame and the jockey pulley that enters the mouth; After the D point passed through the n frame, the mill speed of the whole unit of adjusted in concert was to the mill speed of rules two at last.
Embodiment
This example is an example with four frames, and it is 1～No. 4 that frame numbers in order.
The rolling procedure of at first setting the weld seam front and back is respectively rules one and rules two, sets the weld seam control procedure and begins to finish to the B point from the A point, becomes the specification process and begins to guarantee that to the end of D point weld seam is between B, the C point from the C point; The B point begins to be weldering control time-delay district to the C point that wherein, the distance of A point and weld seam confirms that by the change specification speed of accomplishing required time of implementation of roll gap and velocity variations and current milling train the A point should guarantee that the distance of B point and weld seam leaves certain safe distance after starting; Be generally 0.2 meter, the position that C is ordered is the position that is arrived after the certain time-delay after weld seam passes through frame, and this certain time-delay generally can be 0.5 second, after D point position is confirmed by C point position; In the dynamic variable specification function of milling train, calculate CD section strip steel length and then definite D point position, then frame being numbered in order is 1～n number, is calculated the required roll gap adjusting parameter and the speed regulation parameter of weld seam control of each frame more respectively by the milling train setting model, and its method is: the roll gap thickness of at first setting 1～n frame; At first confirm the target thickness that weld seam needs after through the n-1 frame reach according to the rolling specs of current coil of strip and next coil of strip, confirm that according to certain method of salary distribution of depressing weld seam passes through the roll gap thickness of 1～n-2 frame then, at last based on utilizing mill model to calculate the roll gap thickness of n frame when the weld seam principle that its strip steel at entry speed remains unchanged during through the n frame, and middle rules setting value is calculated by the request instruction that prototype sends according to the one-level process control computer when the rolling fast end of a last coil automatically; Calculate the advancing slip value of 1～n frame and 1～n frame fixed value of roller slit again, press second flow amount equal principle then and set 1～n gantry speed setting value, the change specification speed limit value that after the rolling extension of process n-2 frame, can not be longer than the policy setting milling train of frame spacing according to AD section strip steel length at last utilizes weld joint tracking function butt welded seam position to detect then; Judge whether it reaches weldering control start-up point A point or become specification start-up point C point, when A point arrives No. 1 frame, the roll gap position of No. 1 frame is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter, No. 1 frame of B point arrival when changing completion; During variation by the speed of rolls of No. 1 frame of the corresponding change of speed regulation parameter guaranteeing the constant of forward pull, and by the speed of the corresponding change inlet of speed regulation parameter jockey pulley to guarantee the constant of backward pull, when C point arrives No. 1 frame, the execution dynamic variable specification; With the roll gap position of No. 1 frame from roll gap regulate weld seam control setting value the parameter become in the middle of the rules setting value, change that D point arrives No. 1 frame when accomplishing, by the speed of the corresponding inlet jockey pulley of speed regulation parameter to guarantee the constant of backward pull, when No. 2 frames of A point arrival; The roll gap position of No. 2 frames is become roll gap from the setting value of rules one regulates the weld seam control setting value the parameter, change that B point arrives No. 2 frames when accomplishing, during variation by the speed of rolls of No. 2 frames of the corresponding change of speed regulation parameter guaranteeing the constant of forward pull, and by constant with the assurance backward pull of the speed of No. 1 frame of the corresponding change of speed regulation parameter and inlet jockey pulley; When the C point arrives No. 2 frames, carry out dynamic variable specification, the weld seam of roll gap position from roll gap adjusting parameter of No. 2 frames controlled setting value become middle rules setting value, change No. 2 frames of D point arrival when accomplishing; Again the roll gap position of No. 1 frame is become the setting value of rules two from middle rules setting value, during variation by the speed of rolls of No. 2 frames of the corresponding change of speed regulation parameter guaranteeing the constant of forward pull, by the speed of rolls of No. 1 frame of the corresponding change of speed regulation parameter at the setting tension force of setting up rules two between No. 1 frame and No. 2 frames, by constant with the assurance backward pull of the speed of No. 1 breast roller speed of the corresponding adjusting of speed regulation parameter and inlet jockey pulley; When the A point arrives No. 3 frames, the roll gap position of No. 3 frames is become roll gap from the setting value of rules one regulates the weld seam control setting value the parameter, change that B point arrives No. 3 frames when accomplishing, during variation by constant with the assurance forward pull of the speed of rolls of No. 3 frames of the corresponding change of speed regulation parameter; And by the speed of the frame at No. 3 frame upper reaches of the corresponding change of speed regulation parameter and inlet jockey pulley to guarantee the constant of backward pull, when C point arrives No. 3 frames, carry out dynamic variable specification, the weld seam control setting value that the roll gap position of No. 3 frames is regulated the parameter from roll gap becomes middle rules setting value; D point arrives No. 3 frames when change accomplishing, and again the roll gap position of No. 2 frames is become the setting value of rules two from middle rules setting value, by constant with the assurance forward pull of the speed of rolls of No. 3 frames of the corresponding change of speed regulation parameter, between No. 2 frames and No. 3 frames, is set up the setting tension force of rules two by the speed of rolls of No. 2 frames of the corresponding change of speed regulation parameter during variation;,, when A point arrives No. 4 frames, the roll gap position of No. 4 frames is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter to guarantee the constant of backward pull by the speed of No. 2 frames of the corresponding adjusting of speed regulation parameter and No. 1 breast roller speed and inlet jockey pulley, change No. 4 frames of B point arrival when accomplishing; When the C point arrives No. 4 frames, carry out dynamic variable specification, the weld seam that the roll gap position of No. 4 frames is regulated the parameter from roll gap is controlled the setting value that setting value becomes rules two, the D point arrived No. 4 frames when variation was accomplished; Between No. 3 frames and No. 4 frames, set up the setting tension force of rules two during variation by the speed of rolls of No. 3 frames of the corresponding adjusting of speed regulation parameter, to guarantee the constant of backward pull, after the D point passed through No. 4 frames, the mill speed of the whole unit of adjusted in concert was to the mill speed of rules two at last by the speed of No. 1 frame of the corresponding adjusting of speed regulation parameter, No. 2 frames and No. 3 breast roller speed and inlet jockey pulley.
Wherein, the required roll gap of the weld seam of each frame of this example control regulates parameter and the speed regulation parameter is an example with four frames, and it is 1～No. 4 that frame numbers in order, and it calculates as follows:
1. frame thickness and intermesh determination
Since in the belt steel rolling the unit tension between latter two frame generally set maximum; Therefore for four frame tandem mills; Weldering is disconnected, and to occur in No. 3 frequencies after the frame the highest; So weld seam thickens and only need consider to No. 3 frames, therefore should at first confirm the weldering control target thickness of No. 3 frames, its computing formula is following:
h′
3＝h
3+Δh
3
Wherein, h '
3Be No. 3 frame weldering control target thicknesses, Δ h
3According to ξ * ln{H
0/ h
4Confirm that ξ is an empirical coefficient, general value 0.25～0.3, H
0The expression raw thickness, h
3Be the roll gap thickness of No. 3 frames, h
4Be the roll gap thickness of No. 4 frames.Possibly become specification after considering weld seam, the H in the following formula
0, h
3, h
4All adopt the thin rules setting value of finished product thickness in rules one and the rules two, if the h ' that calculates
3≤h
3, I(h
3, INo. 3 frame exit thicknesses for current rolling procedure one), then do not carry out weld seam control function, otherwise confirm that according to certain method of salary distribution of depressing weld seam passes through the roll gap thickness of No. 1 and No. 2 frame again, the main points of distribution are h '
1Thick as far as possible, purpose is in order to reduce the roll gap regulated quantity of No. 2 and No. 3 frames, to alleviate the difficulty of Tension Control, the throat depth h ' of No. 4 finished frames
4Be based on when weld seam through the time No. 4 frame strip steel at entry speed policy setting of remaining unchanged, No. 4 frames rolling procedure for the moment strip steel at entry speed be:
Wherein, v
H4, IBe No. 4 frame rules one strip steel at entry speed, v
4, IBe No. 4 frame rules one roll linear velocities, f
4, IBe the advancing slip value of No. 4 frame rules one, d
4, IBe No. 4 frame rules strip steel at entry thickness in a period of time, h
4, IBe No. 4 frame rules one outlet belt steel thickness, when weld seam through the time No. 4 frame strip steel at entry rate requests remain unchanged, promptly
Becoming under the fixed situation of specification speed v '
4=v
4, I, then
The following formula right-hand member is known, makes it equal m, then has
Its method for solving is shilling h '
4Initial value do
Calculate f ' through setting model
4, use iterative method can obtain h ' then
4, given accuracy less than 0.001 situation under iterations generally be less than 4 times, behind the exit thickness of having confirmed each frame, setting model can calculate the fixed value of roller slit S ' of each frame
iWith advancing slip value f
i'.
2. gantry speed is set
The policy setting that each gantry speed reference value equates according to the second flow amount; Become specification between tailend since No. 1 frame weldering control to No. 4 frames, have only No. 1, No. 2, No. 3 gantry speed to have transition change, and the speed of No. 4 frames will directly carry out the transition to rules two from rules one; After becoming the specification transition region and leaving No. 4 frames; Make speed regulation make the mill speed of whole unit synchronous raising speed to rules two through main, rule such as table 1 are set and regulated to the speed of each frame
Table 1 gantry speed reference value is set table
Each symbol implication is respectively in the table 1: 1
#Number frame is No. 1 frame, 2
#Number frame is No. 2 frames, 3
#Number frame is No. 3 frames, h
I, jSetting thickness for i frame rules j; H '
iBe i frame weldering control target thickness; V
I, jBe the j time roll setting speed of i frame, f
I, jBe the advancing slip value of i frame rules j, f
I, intBe the advancing slip value of rules in the middle of the i frame, A is weldering control start-up point; C is for becoming the specification start-up point.
3. become the setting of specification (weld seam) speed limit
Consider that the band steel length of AD section can not be longer than the frame spacing after through No. 2 frames, need change specification (weld seam) speed of restriction milling train:
t
AD＝t
AB+t′+t
CD
t
AB＝max(t
AB，ΔV(i，j)，t
AB，ΔS(i，j))
t
CD＝max(t
CD，ΔV(i，j)，t
CD，ΔS(i，j))
Wherein, V
DPCBe the change specification speed of No. 4 frames, L
StBe frame spacing, l
sBe the safe length of reserving, t
AB, and Δ V (i, j)The speed regulation time of i frame during for each frame of weldering control transition region process, t
AB, and Δ S (i, j)The roll gap of i frame is regulated the time, t during for each frame of weldering control transition region process
CD, and Δ V (i, j)The speed regulation time of i frame during for each frame of change specification transition region process, t
CD, and Δ S (i, j)The roll gap of i frame is regulated the time during for each frame of change specification transition region process, and t ' is controlled delay time for weldering.
V in actual production
DPCThe general per minute of selecting can satisfy production requirement for about 120 meters, so satisfying formula
Under the situation of restrictive condition, can proper extension t
ABAnd t
CDThereby, reduce tension fluctuation with the slope that slows down transition region.
Claims (4)
1. the method for the automatic controlled rolling of weld seam is characterized in that, may further comprise the steps:
A. the rolling procedure of setting the weld seam front and back is respectively rules one and rules two, sets the weld seam control procedure and begins to finish to the B point from the A point, becomes the specification process and begins to guarantee that to the end of D point weld seam is between B, the C point from the C point, and the B point begins to distinguish for weldering control time-delay to the C point;
B. to number in order be 1～n number to frame;
C. calculate the required roll gap adjusting parameter and the speed regulation parameter of weld seam control of each frame by the milling train setting model respectively, specifically may further comprise the steps:
C1. set the roll gap thickness of 1～n frame; At first confirm the target thickness that weld seam needs after through the n-1 frame reach according to the rolling specs of current coil of strip and next coil of strip; Confirm that according to certain method of salary distribution of depressing weld seam passes through the roll gap thickness of 1～n-2 frame then; At last based on utilizing mill model to calculate the roll gap thickness of n frame when the weld seam principle that its strip steel at entry speed remains unchanged during through the n frame, middle rules setting value is calculated by the request instruction that prototype sends according to the one-level process control computer when the rolling fast end of a last coil automatically;
C2. calculate the advancing slip value of 1～n frame;
C3. calculate 1～n frame fixed value of roller slit;
C4. press second flow amount equal principle and set 1～n gantry speed setting value;
C5. the change specification speed limit value that after the rolling extension of process n-2 frame, can not be longer than the policy setting milling train of frame spacing according to AD section strip steel length;
D. utilize weld joint tracking function butt welded seam position to detect, judge whether it reaches weldering control start-up point A point or become specification start-up point C point;
E. when the A point arrives the i frame; The roll gap position of i frame is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter; Change B point arrival i frame when accomplishing; During variation by the speed of rolls of the corresponding change of speed regulation parameter i frame guaranteeing the constant of forward pull, and by the speed of the frame at the corresponding change of the speed regulation parameter i frame upper reaches and inlet jockey pulley to guarantee the constant of backward pull, wherein i is the positive integer less than n;
F. when the C point arrives the i frame; Carry out dynamic variable specification; The weld seam control setting value that the roll gap position of i frame is regulated the parameter from roll gap becomes middle rules setting value, and the D point arrives the i frame when changing completion, if i-1 is not 0; Then the roll gap position of i-1 frame becomes the setting value of rules two from middle rules setting value; During variation by the speed of rolls of the corresponding change of speed regulation parameter i frame guaranteeing the constant of forward pull, between i-1 frame and i frame, set up the setting tension force of rules two by the speed of rolls of the corresponding change of speed regulation parameter i-1 frame, by constant with the assurance backward pull of the speed of the breast roller speed at the corresponding adjusting of the speed regulation parameter i-1 frame upper reaches and inlet jockey pulley; If i-1 is 0, then by the speed of the corresponding inlet jockey pulley of speed regulation parameter to guarantee the constant of backward pull;
G. judge whether i+1 equals n, if then get into next step, if not then make i=i+1 and get back to the e step;
H. when the A point arrives the n frame, the roll gap position of n frame is become roll gap from the setting value of rules one regulate the weld seam control setting value the parameter, change B point arrival n frame when accomplishing;
I. when the C point arrives the n frame; Carry out dynamic variable specification; The weld seam that the roll gap position of n frame is regulated the parameter from roll gap is controlled the setting value that setting value becomes rules two; D point arrives the n frame when change accomplishing, and between n-1 frame and n frame, is set up the setting tension force of rules two during variation by the speed of rolls of the corresponding adjusting of speed regulation parameter n-1 frame, by constant with the assurance backward pull of the speed of the speed regulation parameter corresponding adjusting 1～n-2 frame and the jockey pulley that enters the mouth;
J. after the D point passed through the n frame, the mill speed of the whole unit of adjusted in concert was to the mill speed of rules two.
2. according to the method for the automatic controlled rolling of the said weld seam of claim 1; It is characterized in that; The distance of said A point of step a and weld seam is confirmed by the change specification speed of accomplishing required time of implementation of roll gap and velocity variations and current milling train; The A point should guarantee that the distance of B point and weld seam leaves certain safe distance after starting; The position that said C is ordered is the position that is arrived after the certain time-delay after weld seam passes through frame, and said D point position calculates CD section strip steel length and then definite D point position after being confirmed by C point position in the dynamic variable specification function of milling train.
3. according to the method for the automatic controlled rolling of the said weld seam of claim 2, it is characterized in that said certain time-delay is 0.5 second, said certain safe distance is 0.2 meter.
4. according to the method for the automatic controlled rolling of the said weld seam of claim 1, it is characterized in that said each frame of step b is four frames, it is 1～No. 4 that frame numbers in order.
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| CN109013712B (en) * | 2017-06-09 | 2020-01-21 | 上海梅山钢铁股份有限公司 | Reduction rate compensation method during cold continuous rolling dynamic specification changing |
| CN108043883B (en) * | 2017-12-08 | 2019-11-01 | 山西太钢不锈钢股份有限公司 | A method of improving sour three roller jockey pulley weld seam percent of pass of tandem rolling high grade silicon steel |
| CN109954753B (en) * | 2019-03-07 | 2020-10-27 | 山西太钢不锈钢股份有限公司 | Method for reducing quick-opening broken belt of acid continuous rolling tension leveler |
| CN110064653B (en) * | 2019-04-18 | 2021-08-20 | 首钢京唐钢铁联合有限责任公司 | Method and device applied to rolling of transition section of cold continuous rolling mill |
| CN110142314B (en) * | 2019-06-05 | 2021-09-24 | 北京首钢冷轧薄板有限公司 | Method and device for controlling tension fluctuation of galvanized wire welding line burnishing machine |
| CN114130825B (en) * | 2021-11-30 | 2023-11-17 | 攀钢集团攀枝花钢钒有限公司 | Method for removing sleeve from ultrathin material winding core and winding |
| CN114798753A (en) * | 2022-04-21 | 2022-07-29 | 宝钢湛江钢铁有限公司 | Automatic rolling method for weak-strength welding seam of continuous mill |
| CN116274422B (en) * | 2023-03-23 | 2023-12-01 | 首钢智新迁安电磁材料有限公司 | Method and device for detecting connecting weld joint |
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| JP3651452B2 (en) * | 2002-06-10 | 2005-05-25 | Ｊｆｅスチール株式会社 | Tension control method near the weld zone in cold tandem rolling |
| JP2004167508A (en) * | 2002-11-18 | 2004-06-17 | Jfe Steel Kk | Method for controlling hunting motion of metal strip in cold tandem rolling machine |
| CN101892428B (en) * | 2010-07-16 | 2012-02-08 | 攀钢集团钢铁钒钛股份有限公司 | High-strength hot continuous rolling steel plate and production method thereof |
| CN101905246B (en) * | 2010-08-13 | 2013-03-20 | 攀钢集团钢铁钒钛股份有限公司 | Automatic control method for dynamic variable specification welding seam of rolling mill |
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