CN102172634A - Method for rolling welding line under automatic control - Google Patents
Method for rolling welding line under automatic control Download PDFInfo
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- CN102172634A CN102172634A CN 201010614776 CN201010614776A CN102172634A CN 102172634 A CN102172634 A CN 102172634A CN 201010614776 CN201010614776 CN 201010614776 CN 201010614776 A CN201010614776 A CN 201010614776A CN 102172634 A CN102172634 A CN 102172634A
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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 the necessary unit tension that control measure are born when reducing weld seam by rolling-mill housing that thickens, and then reduction weld seam broken belt rate, though this manually operated rolling mode or method are playing certain effect aspect the minimizing weld seam broken belt, 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 by 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 it is that weldering control time-delay is distinguished that the B point begins 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 adjusting 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 weld seam control setting value the parameter, change B point arrival i frame when finishing, regulate the speed of rolls of the corresponding change of parameter i frame to guarantee the constant of forward pull by speed during variation, and the speed of regulating the frame of the corresponding change of parameter i frame upstream and inlet jockey pulley by speed to be to guarantee the constant of backward pull, and 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, change D point arrival i frame when finishing, 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, regulate the speed of rolls of the corresponding change of parameter i frame to guarantee the constant of forward pull by speed during variation, 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 adjusting parameter i-1 frame, regulate the speed of the breast roller speed of the corresponding adjusting of parameter i-1 frame upstream and the jockey pulley that enters the mouth to guarantee the constant of backward pull by speed, if i-1 is 0, then regulate the speed of the corresponding inlet jockey pulley of parameter to guarantee the constant of backward pull by speed;
G. judge whether i+1 equals n, if then enter 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 weld seam control setting value the parameter, change B point arrival n frame when finishing;
I. when the C point arrives the n frame, carry out dynamic variable specification, the weld seam control that the roll gap position of n frame is regulated the parameter from roll gap sets value the setting value that becomes rules two, change D point arrival n frame when finishing, between n-1 frame and n frame, set up the setting tension force of rules two during variation by the speed of rolls of the corresponding adjusting of speed adjusting parameter n-1 frame, regulate the speed of parameter corresponding adjusting 1～n-2 frame and inlet jockey pulley to guarantee the constant of backward pull by speed;
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 determine the target thickness that weld seam needs after by the n-1 frame reach according to the rolling specs of current coil of strip and next coil of strip, determine 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 by the n frame, middle rules setting value is calculated automatically by the request instruction that prototype sends according to the one-level process control computer when the rolling fast end of a last coil;
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. passing through the change specification speed limit value that to be longer than the policy setting milling train of frame spacing after the rolling extension of n-2 frame according to AD section strip steel length.
Further, the distance of described A point of step a and weld seam is determined that by the change specification speed of finishing 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 described C is ordered is the position that is arrived after the certain time-delay after weld seam passes through frame; Described D point position calculates CD section strip steel length and then definite D point position after being determined by C point position in the dynamic variable specification function of milling train.
Concrete, described certain time-delay is 0.5 second; Described certain safe distance is 0.2 meter.
Concrete, described 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 by 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 had 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 the purpose that reduces the weld seam broken belt rate and improve 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 of the present invention is: the rolling procedure of at first setting the weld seam front and back is respectively rules one and rules two, setting the weld seam control procedure begins to finish to the B point from the A point, becoming the specification process begins to finish to the D point from the C point, guarantee that weld seam is in B, between the C point, the B point begins to be weldering control time-delay district to the C point, then frame being numbered in order is 1～n number, calculate the required roll gap adjusting parameter and the speed adjusting parameter of weld seam control of each frame more respectively by the milling train setting model, 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 regulate weld seam control setting value the parameter, change B point arrival i frame when finishing, regulate the speed of rolls of the corresponding change of parameter i frame to guarantee the constant of forward pull by speed during variation, and regulate the speed of the frame of the corresponding change of parameter i frame upstream and inlet jockey pulley to guarantee the constant of backward pull by speed, wherein i is the positive integer less than n, 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, change D point arrival i frame when finishing, 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, regulate the speed of rolls of the corresponding change of parameter i frame to guarantee the constant of forward pull by speed during variation, 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 adjusting parameter i-1 frame, regulate the speed of the breast roller speed of the corresponding adjusting of parameter i-1 frame upstream and the jockey pulley that enters the mouth to guarantee the constant of backward pull by speed, if i-1 is 0, then regulate the speed of the corresponding inlet jockey pulley of parameter to guarantee the constant of backward pull by speed, 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 weld seam control setting value the parameter, change B point arrival n frame when finishing, when the C point arrives the n frame, carry out dynamic variable specification, the weld seam control that the roll gap position of n frame is regulated the parameter from roll gap sets value the setting value that becomes rules two, change D point arrival n frame when finishing, between n-1 frame and n frame, set up the setting tension force of rules two during variation by the speed of rolls of the corresponding adjusting of speed adjusting parameter n-1 frame, regulate the speed of parameter corresponding adjusting 1～n-2 frame and inlet jockey pulley to guarantee the constant of backward pull by speed, 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, setting the weld seam control procedure begins to finish to the B point from the A point, becoming the specification process begins to finish to the D point from the C point, guarantee that weld seam is in B, between the C point, the B point begins to be weldering control time-delay district to the C point, wherein, the distance of A point and weld seam is determined by the change specification speed of finishing 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, this certain time-delay generally can be 0.5 second, after D point position is determined 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, calculate the required roll gap adjusting parameter and the speed adjusting parameter of weld seam control of each frame more respectively by the milling train setting model, its method is: the roll gap thickness of at first setting 1～n frame, at first determine the target thickness that weld seam needs after by the n-1 frame reach according to the rolling specs of current coil of strip and next coil of strip, determine 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 the roll gap thickness that utilizes mill model calculating n frame when the weld seam principle that its strip steel at entry speed remains unchanged during by the n frame, and middle rules setting value is calculated automatically by the request instruction that prototype sends according to the one-level process control computer when the rolling fast end of a last coil, 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 last 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, 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 No. 1 frame, the roll gap position of No. 1 frame is become roll gap from the setting value of rules one regulate weld seam control setting value the parameter, change No. 1 frame of B point arrival when finishing, regulate the speed of rolls of No. 1 frame of the corresponding change of parameter to guarantee the constant of forward pull by speed during variation, and the speed of being regulated the corresponding change inlet of parameter jockey pulley by speed when No. 1 frame of C point arrival, is carried out dynamic variable specification to guarantee the constant of backward pull, the weld seam control setting value that the roll gap position of No. 1 frame is regulated the parameter from roll gap becomes middle rules setting value, change No. 1 frame of D point arrival when finishing, the speed of being regulated the corresponding inlet jockey pulley of parameter by speed is to guarantee the constant of backward pull, when the A point arrives No. 2 frames, the roll gap position of No. 2 frames is become roll gap from the setting value of rules one regulate weld seam control setting value the parameter, change that B point arrives No. 2 frames when finishing, the speed of rolls of regulating No. 2 frames of the corresponding change of parameter by speed during variation to be guaranteeing the constant of forward pull, and the speed of being regulated No. 1 frame of the corresponding change of parameter and inlet jockey pulley by speed constant with the assurance backward pull, 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, No. 2 frames of D point arrival when variation is finished, again the roll gap position of No. 1 frame is become the setting value of rules two from middle rules setting value, the speed of rolls of regulating No. 2 frames of the corresponding change of parameter by speed during variation to be to guarantee the constant of forward pull, and the speed of rolls of being regulated No. 1 frame of the corresponding change of parameter by speed is set up the setting tension force of rules two between No. 1 frame and No. 2 frames, and the speed of being regulated No. 1 breast roller speed of the corresponding adjusting of parameter and inlet jockey pulley by speed is constant with the assurance backward pull, 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 regulate weld seam control setting value the parameter, change that B point arrives No. 3 frames when finishing, the speed of rolls of regulating No. 3 frames of the corresponding change of parameter by speed during variation is constant with the assurance forward pull, and regulate the speed of the frame of No. 3 frame upstreams of the corresponding change of parameter and inlet jockey pulley to guarantee the constant of backward pull by speed, when No. 3 frames of C point arrival, 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, change No. 3 frames of D point arrival when finishing, again the roll gap position of No. 2 frames is become the setting value of rules two from middle rules setting value, the speed of rolls of regulating No. 3 frames of the corresponding change of parameter by speed during variation to be to guarantee the constant of forward pull, and the speed of rolls of being regulated No. 2 frames of the corresponding change of parameter by speed is set up the setting tension force of rules two between No. 2 frames and No. 3 frames, regulate the speed of No. 2 frames of the corresponding adjusting of parameter and No. 1 breast roller speed and the jockey pulley that enters the mouth to guarantee the constant of backward pull by speed, when the 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 weld seam control setting value the parameter, change No. 4 frames of B point arrival when finishing, when the C point arrives No. 4 frames, carry out dynamic variable specification, the weld seam control that the roll gap position of No. 4 frames is regulated the parameter from roll gap sets value the setting value that becomes rules two, and the D point arrived No. 4 frames when variation was finished, the speed of rolls of regulating No. 3 frames of the corresponding adjusting of parameter by speed during variation is set up the setting tension force of rules two between No. 3 frames and No. 4 frames, regulate No. 1 frame of the corresponding adjusting of parameter by speed, the speed of No. 2 frames and No. 3 breast roller speed and inlet jockey pulley to be to guarantee the constant of backward pull, and 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.
Wherein, the required roll gap of the weld seam of each frame of this example control regulates parameter and speed adjusting parameter is an example with four frames, and it is 1～No. 4 that frame numbers in order, and it is calculated 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 determine the weldering control target thickness of No. 3 frames, its computing formula is as follows:
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
4Determine 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.May become specification after considering weld seam, the H in the following formula
0, h
3, h
4All adopt the rules setting value that finished product thickness is thin 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 determine 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 force control, the throat depth h ' of No. 4 finished frames
4Be based on when weld seam by 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 by 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 be
Calculate f ' by 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 determined 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 the speed adjusting make the mill speed of whole unit synchronous raising speed to rules two by 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 by 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 of i frame is regulated the time, t during for each frame of weldering control transition region process
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 of i frame is regulated the time, t during for each frame of change specification transition region process
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 (5)
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 it is that weldering control time-delay is distinguished that the B point begins 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 adjusting 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 weld seam control setting value the parameter, change B point arrival i frame when finishing, regulate the speed of rolls of the corresponding change of parameter i frame to guarantee the constant of forward pull by speed during variation, and the speed of regulating the frame of the corresponding change of parameter i frame upstream and inlet jockey pulley by speed to be to guarantee the constant of backward pull, and 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, change D point arrival i frame when finishing, 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, regulate the speed of rolls of the corresponding change of parameter i frame to guarantee the constant of forward pull by speed during variation, 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 adjusting parameter i-1 frame, regulate the speed of the breast roller speed of the corresponding adjusting of parameter i-1 frame upstream and the jockey pulley that enters the mouth to guarantee the constant of backward pull by speed, if i-1 is 0, then regulate the speed of the corresponding inlet jockey pulley of parameter to guarantee the constant of backward pull by speed;
G. judge whether i+1 equals n, if then enter 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 weld seam control setting value the parameter, change B point arrival n frame when finishing;
I. when the C point arrives the n frame, carry out dynamic variable specification, the weld seam control that the roll gap position of n frame is regulated the parameter from roll gap sets value the setting value that becomes rules two, change D point arrival n frame when finishing, between n-1 frame and n frame, set up the setting tension force of rules two during variation by the speed of rolls of the corresponding adjusting of speed adjusting parameter n-1 frame, regulate the speed of parameter corresponding adjusting 1～n-2 frame and inlet jockey pulley to guarantee the constant of backward pull by speed;
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 described weld seam of claim 1, it is characterized in that step c may further comprise the steps:
C1. set the roll gap thickness of 1～n frame, at first determine the target thickness that weld seam needs after by the n-1 frame reach according to the rolling specs of current coil of strip and next coil of strip, determine 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 by the n frame, middle rules setting value is calculated automatically by the request instruction that prototype sends according to the one-level process control computer when the rolling fast end of a last coil;
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. passing through the change specification speed limit value that to be longer than the policy setting milling train of frame spacing after the rolling extension of n-2 frame according to AD section strip steel length.
3. according to the method for claim 1 or the automatic controlled rolling of 2 described weld seams, it is characterized in that, the distance of described A point of step a and weld seam is determined by the change specification speed of finishing 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 described C is ordered is the position that is arrived after the certain time-delay after weld seam passes through frame, described D point position calculates CD section strip steel length and then definite D point position after being determined by C point position in the dynamic variable specification function of milling train.
4. according to the method for the automatic controlled rolling of the described weld seam of claim 3, it is characterized in that described certain time-delay is 0.5 second, described certain safe distance is 0.2 meter.
5. according to the method for claim 1 or the automatic controlled rolling of 2 described weld seams, it is characterized in that described each frame of step b is four frames, it is 1～No. 4 that frame numbers in order.
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| CN103191929A (en) * | 2013-03-30 | 2013-07-10 | 马钢(集团)控股有限公司 | Technological method for reducing belt breaking times in rolling mill starting |
| CN105880295A (en) * | 2016-05-04 | 2016-08-24 | 首钢京唐钢铁联合有限责任公司 | Control method and device for thickening of head part of strip steel subjected to acid rolling and shearing |
| CN105880296A (en) * | 2016-04-08 | 2016-08-24 | 攀钢集团西昌钢钒有限公司 | Dynamic specification change method for cold-rolled thin strip |
| CN108043883A (en) * | 2017-12-08 | 2018-05-18 | 山西太钢不锈钢股份有限公司 | A kind of method for improving the high three roller jockey pulley weld seam percent of pass of the trade mark of sour tandem rolling silicon steel |
| CN109013712A (en) * | 2017-06-09 | 2018-12-18 | 上海梅山钢铁股份有限公司 | Reduction ratio compensation method when cold continuous rolling dynamic variable specification |
| CN109954753A (en) * | 2019-03-07 | 2019-07-02 | 山西太钢不锈钢股份有限公司 | Reduce the method that sour tandem rolling tension straightening machine cut-offs band fastly |
| CN110064653A (en) * | 2019-04-18 | 2019-07-30 | 首钢京唐钢铁联合有限责任公司 | A kind of method and apparatus applied to the rolling of cold continuous rolling changeover portion |
| CN110142314A (en) * | 2019-06-05 | 2019-08-20 | 北京首钢冷轧薄板有限公司 | A kind of galvanized wire weld seam crosses the control method and device of polishing machine tension fluctuation |
| CN114130825A (en) * | 2021-11-30 | 2022-03-04 | 攀钢集团攀枝花钢钒有限公司 | Method for removing sleeve of extremely thin 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 |
| CN116274422A (en) * | 2023-03-23 | 2023-06-23 | 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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| CN103191929B (en) * | 2013-03-30 | 2015-05-13 | 马钢(集团)控股有限公司 | Technological method for reducing belt breaking times in rolling mill starting |
| CN103191929A (en) * | 2013-03-30 | 2013-07-10 | 马钢(集团)控股有限公司 | Technological method for reducing belt breaking times in rolling mill starting |
| CN105880296A (en) * | 2016-04-08 | 2016-08-24 | 攀钢集团西昌钢钒有限公司 | Dynamic specification change method for cold-rolled thin strip |
| CN105880295A (en) * | 2016-05-04 | 2016-08-24 | 首钢京唐钢铁联合有限责任公司 | Control method and device for thickening of head part of strip steel subjected to acid rolling and shearing |
| CN105880295B (en) * | 2016-05-04 | 2018-06-26 | 首钢京唐钢铁联合有限责任公司 | A kind of acid rolls the control method and device that thicken of strip steel head after shearing |
| CN109013712A (en) * | 2017-06-09 | 2018-12-18 | 上海梅山钢铁股份有限公司 | Reduction ratio compensation method when cold continuous rolling dynamic variable specification |
| 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 |
| CN108043883A (en) * | 2017-12-08 | 2018-05-18 | 山西太钢不锈钢股份有限公司 | A kind of method for improving the high three roller jockey pulley weld seam percent of pass of the trade mark of sour tandem rolling silicon steel |
| CN109954753A (en) * | 2019-03-07 | 2019-07-02 | 山西太钢不锈钢股份有限公司 | Reduce the method that sour tandem rolling tension straightening machine cut-offs band fastly |
| CN110064653A (en) * | 2019-04-18 | 2019-07-30 | 首钢京唐钢铁联合有限责任公司 | A kind of method and apparatus applied to the rolling of cold continuous rolling changeover portion |
| CN110142314A (en) * | 2019-06-05 | 2019-08-20 | 北京首钢冷轧薄板有限公司 | A kind of galvanized wire weld seam crosses the control method and device of polishing machine tension fluctuation |
| CN114130825A (en) * | 2021-11-30 | 2022-03-04 | 攀钢集团攀枝花钢钒有限公司 | Method for removing sleeve of extremely thin material winding core and winding |
| 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 |
| CN116274422A (en) * | 2023-03-23 | 2023-06-23 | 首钢智新迁安电磁材料有限公司 | Method and device for detecting connecting weld joint |
| 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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