CN108655182B - A kind of hot-strip production method of overall length thickness consecutive variations - Google Patents
A kind of hot-strip production method of overall length thickness consecutive variations Download PDFInfo
- Publication number
- CN108655182B CN108655182B CN201710195644.4A CN201710195644A CN108655182B CN 108655182 B CN108655182 B CN 108655182B CN 201710195644 A CN201710195644 A CN 201710195644A CN 108655182 B CN108655182 B CN 108655182B
- Authority
- CN
- China
- Prior art keywords
- thickness
- head
- length
- thickens
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/24—Automatic variation of thickness according to a predetermined programme
- B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
- B21B2261/043—Blanks with variable thickness in the rolling direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The present invention is a kind of hot-strip production method of overall length thickness consecutive variations, the hot-strip of overall length thickness consecutive variations is by head, the section that thickens and tail portion composition, head, tail portion are respectively the identical uniform thickness section of thickness, and tail portion thickness is greater than head thickness, it thickens between Duan Tou, tail portion, is increased continuously with a thickness of from head thickness to tail portion thickness；Its production method includes: setting head thickness setting value, calculate each finishing rolling mill of mm finishing mill unit initial roll gap and initial velocity and issue primary computer execution；Steel is stung in each rack completion, it is ensured that head thickness is head thickness setting value；Head length is controlled；Uniform thickness feedback control is carried out according to head thickness setting value using Monitor Process；To thickeing, segment length and thickeing is controlled；Length and thickness control are carried out to tail portion.The present invention has produced the strip that thickens of the overall length direction thickness consecutive variations of specific demand in the way of the feedback control target for changing Monitor Process in real time.
Description
Technical field
The present invention relates to the production method of hot-strip, the hot-strip for referring in particular to a kind of overall length thickness consecutive variations is raw
Production method.
Background technique
Most users are to require the thickness fluctuation in hot-strip overall length direction small, and thickness is as uniform as possible, very
It is consecutive variations that rare user, which requires the thickness in hot-strip overall length direction, so conventional hot-strip production is all to control
For the purpose of strip overall length thickness is uniform.General hot rolling Continuous mill train is all with horizontal (the overall length thickness fluctuation of its thickness and precision
Standard deviation) mono- hot rolling producing line of Lai Hengliang comprehensively control level and advanced degree.
With social development, the demand of the hot-strip (referred to as thicken strip) of overall length thickness consecutive variations occurs therewith.
The relevant technologies of the presently disclosed strip that thickens are mainly the method for concentrating on single chassis heavy and medium plate mill producing the strip that thickens
And the relevant technologies of the stability of thickness transitions between different-thickness specification are realized during similar endless rolling, do not have also
Relate to the production or control of the hot-strip using traditional conventional hot continuous rolling machine unit production length direction thickness consecutive variations
The technology of method.
Conventional hot continuous rolling machine machine be by second flow balance based on controlled, thicken in conventional hot continuous rolling machine machine rolling
Making other than carrying out accurate control to roll gap also pressure to each rack roll gap or will lift speed between timing, front and back rack
Degree matching and loop stability etc. are controlled.The process of thickeing will be avoided as far as possible because second flow imbalance is to rolling stability
Influence, thus to be carried out in hot continuous rolling rack it is accurate thicken control it is difficult.On the other hand, by the limit of user demand
System, the application field for the hot-strip that thickens is very narrow, and most users require using strip in homogeneous thickness, so should
Development of the technology on traditional continuous hot-rolling mill is relatively slow.
Also occur the technology of related Varying-thickness rolling at present, example:
" length control method when a kind of Varying-thickness rolls " of Patent No. " CN201310315225.1 ", core skill
Art is that one kind of regular length and the amount of thickeing thickens length control implementation, and implementation step, which is specifically included that, to be rolled thickeing
When system is not put into, measuring roller is counted as 0；When thickeing rolling investment, the length of the rolled out band of measuring roller start recording, work
The movement for making roller is as follows: when measured length reaches, working roll is pushed with certain pressing speed；When the length measured reaches
When, working roll position keeps no longer pressing down；When the length measured reaches, working roll is lifted with certain speed；When measuring
Length when reaching, working roll position keeps no longer up lifting；When the length measured reaches L1+L2+T1 × 2, measuring roller meter
Number is reset, and repeats preceding step.According to the present invention, the length according to measured by measuring roller, and the strip profile of reference settings are right
The depressing position of working roll is adjusted in real time, is a kind of very easy reliable length control method.
" method for controlling thickness of cold continuous rolling dynamic variable specification rolling and the control of Patent No. " CN201610286478.4 "
System processed ", core technology are that efficiently solve thickness and precision of cold continuous rolling during unstable state rolls with stable state
Stage processed have significance difference away from the technical issues of, ensure that unstable state process also has high-precision thickness, and then improves
The lumber recovery of ultrathin strip production process.Its method specifically includes that when detecting that dynamic variable specification point enters S1 rack, obtains S1
Strip thickness deviation at rack outlet；Judge that the strip thickness deviation at the S1 rack outlet is greater than or equal to default thickness
When poor permissible value, the strip thickness deviation discreet value in each downstream rack exit is estimated；Milling train based on the i-th downstream rack is rigid
Degree and strip are plastically deformed coefficient, calculate the i-th downstream rack for the i-th roll gap needed for respective strip thickness deviation discreet value
Regulated quantity；Before dynamic variable specification point enters the i-th downstream rack, the roll gap of the i-th downstream rack is adjusted based on the i-th adjustment amount of roll gap
Setting value.
But above scheme and technical solution of the present invention are all different, and the present invention changes Monitor Process using real-time
The mode of feedback control target, by overall length steel strip thickness target accurately calculate and feedback control, produced special need
The strip that thickens for the overall length direction thickness consecutive variations asked.
Summary of the invention
The purpose of the present invention is to solve problems of the existing technology, provide a kind of heat of overall length thickness consecutive variations
Roll strip production method.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of hot-strip production method of overall length thickness consecutive variations, the hot-strip of the overall length thickness consecutive variations
By head, the section that thickens and tail portion composition, the head are the identical head uniform thickness section of thickness, and the tail portion is the identical tail of thickness
Portion's uniform thickness section, and tail portion thickness G T.GT.GT head thickness, the section that thickens is between head and tail portion, with a thickness of from head thickness
It is increased continuously to tail portion thickness；Wherein, the production method comprises the steps of:
S1 sets the head thickness setting value for the strip that thickens using process computer LEVEL2 model, according to head automatically
Thickness setting value calculates the initial roll gap and initial velocity of this 7 finishing rolling mills of mm finishing mill unit F1-F7 automatically；
After the completion of S2, process computer LEVEL2 set head thickness setting value, by the initial roll gap of each rack and initially
Speed issues primary computer LEVEL1 execution；
S3, F1-F7 rack sting steel according to given initial roll gap and speed completion, it is ensured that the head thickness h for the strip that thickens1
For head thickness setting value；
S4, to head length L1It is controlled；
S5 goes out the length s of F7 rack to the calculated head Real-time Feedback LEVEL11Differentiated；
S6, when determining s in step S51Less than required head length L1When, Monitor Process is according to head thickness setting value
Uniform thickness feedback control is carried out, Monitor Process actual measurement head goes out the thickness of F7 rack, as the head thickness h of actual measurement1Less than set
When head thickness setting value, F5-F7 rack starts upper lift roll gap；On the contrary, as the head thickness h of actual measurement1Greater than set head
When portion's thickness setting value, F5-F7 rack starts to push roll gap, until the head thickness h of actual measurement1Equal to set head thickness
When setting value, the stability contorting to head equal thickness section is realized；
S7, when determining s in step S51Equal to required head length L1When, the length control of head uniform thickness section terminates,
Into the segment length control that thickens；The length target for the section that thickens is according to the thickness of size of plate blank and finished product, width dimensions requirement, benefit
It is calculated with constancy of volume principle；
Whether S8, the judgement section that thickens terminate, and the physical length control for the section that thickens goes out the length after F7 rack according to strip steel head
Degree tracking feedback is realized, if the section that thickens is not finished, continues back at above-mentioned steps S7；
S9, when thickeing, section has terminated, and the length that the strip that Real-time Feedback calculates goes out F7 rack subtracts head length L1Afterwards
Thicken section strip steel real time length s2Equal to the required segment length L that thickens2When, the segment length that thickens control and the control that thickens are completed, after
It is continuous that length and thickness control are carried out to tail portion；Complete the control that thickens of overall length strip.
In the step S1, process computer LEVEL2 model be according to the workpiece thickness of mm finishing mill unit entrance, width,
The sharing of load and head thickness h for each rack that temperature, implementation thicken1Head thickness setting value is calculated, wherein head
Thickness h1It is exactly required finished product head thickness, is rolled by the way that setting distribution is each in the production process for realizing this thickness
The thickness of machine finally ensures that the strip finished product head thickness that last rack is shut out is equal to required head thickness h1。
In the step S4, it is real that head length controls the length tracking feedback after going out F7 rack according to the head for the strip that thickens
Show, the tracking that F7 rack stings the later strip length of steel is calculated as follows (1):
s1=v0×t+v1×t+····+vn×t (1)
Wherein:
s1The strip steel head that thickens goes out the length (m) of F7 rack；
v0Initial velocity (m/s) is the strip threading speed of setting, value range 2-20m/s；
v1The speed (m/s) of-the 1 scan period, since going out after F7 rack strip steel head according to one it is fixed when
Between interval delay acquire the speed of last rack in real time, the 1st scanning scan period referred to that the 1st fixed time interval delay obtained
The real-time speed data, v1Value range be 2-20m/s；
vnThe speed (m/s) of-the n-th scan period, since going out after F7 rack strip steel head according to one it is fixed when
Between interval delay acquire the speed of last rack in real time, the n-th scan period referred to the speed of the F7 acquired after n-th of set time,
vnValue range be 2-20m/s；N is to go out the last one scan period number required for F7 rack is completed in real time from strip；
The t- scan period is constant；Scan period is exactly to be delayed to obtain real time data according to fixed time interval,
It is constant, is 0.02 second.
In the step S7, the segment length that thickens L2Formula is calculated as follows to obtain:
Wherein:
H- slab thickness (m)；
W- width of plate slab (m)；
L- slab length (m)；
h1Head thickness (m)；
L1Head length (m)；
L2Thicken segment length (m)；
h3Tail portion thickness (m)；
L3Tail length (m)；
W1Finished product thickens strip width (m), and the head, the section that thickens, the width of tail portion are all the same, on-demand required value.
In the step S8, F7 rack is stung shown in the tracking as the following formula of the later strip length of steel:
s2=v0×t+v1×t+····+vn×t-L1
Wherein: s2Thicken section strip steel real time length (m)；
v0Initial velocity (m/s)；
v1The speed (m/s) of-the 1 scan period, v1Value range be 2-20m/s；
vnThe speed (m/s) of-the n-th scan period；
The t- scan period (s) is constant, generally takes 0.02s；
L1Head length (m).
In the step S7-S8, section thickness that thickens need to be controlled, the thickness for the section that thickens meets in the segment length that thickens
L2Within carry out, the thickness of the section that thickens is from head thickness h1Continuously thicken to tail portion thickness h3, using in the segment length L that thickens2Range
Within, by way of becoming the target thickness of monitoring feedback AGC in real time, realized by the feedback of Monitor Process；Thicken a section Monitor Process
Thickness targets be a function, function characterization is thickness targets at section different location that thickens, is called the section that thickens
Real-time target thickness h2；According to the control length for the section that thickens and the absolute magnitude to thicken, the Monitor Process on per unit length is calculated
Target thickness change rate, the thickness change for section Monitor Process that thickens are as follows:
h2=h1+δ×s2
Wherein: δ-thickens a section target thickness change rate；
h2Thicken a section real-time target thickness (m)；
s2Thicken section strip steel real time length (m)；
L1Head length (m)；
L2Thicken segment length (m)；
h3Tail portion thickness (m)；
L3Tail length (m).
In the step S9, the length control of tail portion goes out the length tracking feedback realization after F7 rack according to strip steel head,
The following principle that F7 rack stings the later strip length of steel is as follows:
s3=v0×t+v1×t+····+vn×t-L1-L2
Wherein: s3Tail portion strip real time length (m)；
v0Initial velocity (m/s)；
v1The speed (m/s) of-the 1 scan period；
vnThe speed (m/s) of-the n-th scan period；
The t- scan period (s) is constant, takes 0.02s；
L1Head length (m)；
L2Thicken segment length (m)；
When the length that the strip that Real-time Feedback calculates goes out F7 rack subtracts head length L1And the segment length L that thickens2Tail portion afterwards
Strip real time length s3Equal to required tail length L3When, tail length control is completed, tail length control period, tail portion
The thickness control of uniform thickness section is realized using the feedback of Monitor Process, and Monitor Process actual measurement strip steel head goes out the thickness h of F7 rack, when
The thickness h of actual measurement is less than required tail portion thickness h3When, F5-F7 rack starts upper lift roll gap；On the contrary, when the thickness h of actual measurement
Greater than required tail portion thickness h3When, F5-F7 rack starts to push roll gap, until the actual measurement thickness h of tail portion is equal to required
Tail portion thickness h3When, the stability contorting to tail portion uniform thickness section is realized, at this point, completing the control that thickens of overall length strip.
Beneficial effects of the present invention:
The hot-strip production method of overall length thickness consecutive variations of the invention is to utilize the feedback for changing Monitor Process in real time
Control target mode, by overall length steel strip thickness target accurately calculate and feedback control, produced specific demand
The strip that thickens of overall length direction thickness consecutive variations.
The hot-strip that a kind of a roll of thickness from the beginning to the end gradually even variation can be produced, can using the hot-strip
Wall thickness gradually even variation oil well pipe is produced, hot-strip produced by the invention can subtract on the basis of taking into account steel strength
Few steel pipe own wt, saves the production and application cost of steel pipe.
To further illustrate above-mentioned purpose, design feature and effect of the invention, below with reference to attached drawing to the present invention into
Row is described in detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of strip of thickeing；
Fig. 2 is the variation schematic diagram for being changed into the strip that thickens from slab；
Fig. 3 is the flow diagram of the hot-strip production method of overall length thickness consecutive variations of the present invention.
Specific embodiment
Below with reference to the attached drawing of embodiment, detailed description of the preferred embodiments.
The heat of overall length thickness consecutive variations described in the hot-strip production method of overall length thickness consecutive variations of the present invention
The structure of strip (hereinafter referred to as thicken strip) is rolled referring to Fig. 1, and by head, the section that thickens and tail portion composition, the head is thickness
Spend identical head uniform thickness section, the tail portion is the identical tail portion uniform thickness section of thickness, and tail portion thickness G T.GT.GT head thickness, the change
Thick section is between head and tail portion, is increased continuously with a thickness of from head thickness to tail portion thickness.
Heretofore described production method is to change Monitor Process feedback target in real time to strip overall length, is realized as shown in Figure 2
Rectangular slab production become into overall length thickness be increased continuously the hot-strip of variation.
The process of the hot-strip production method of overall length thickness consecutive variations of the present invention is referring to Fig. 3, the specific steps are as follows:
S1 sets the head thickness setting value for the strip that thickens.Head thickness setting value is using process computer
(LEVEL2) model is set automatically, process computer model be according to the workpiece thickness of mm finishing mill unit entrance, width, temperature,
Implement the sharing of load and head thickness h of each rack to thicken1Head thickness setting value (wherein head thickness h is calculated1
It is exactly required finished product head thickness, but has to roll by the way that setting distribution is each in the production process for realizing this thickness
The thickness of machine finally ensures that the strip finished product head thickness that last rack is shut out is equal to required head thickness h1), according to head
Thickness setting value calculates the initial roll gap and initial velocity of this 7 finishing rolling mills of mm finishing mill unit F1-F7 automatically.
S2, after the completion of process computer (LEVEL2) sets head thickness setting value, by the initial roll gap of each rack and just
Beginning speed issues primary computer (LEVEL1) execution.
S3, F1-F7 rack sting steel according to given initial roll gap and speed completion, it is ensured that the head thickness h for the strip that thickens1
For head thickness setting value.
S4, to head length L1Control.Head length L1Depending on demand, head length L under normal circumstances1All compare
Short, the section that do not influence to thicken after the main needs for considering user's welding and the excision of production process strip steel head defect normally makes
With.
Head length control goes out the length tracking feedback realization after F7 rack according to the head for the strip that thickens, and F7 rack stings steel
The tracking of later strip length is calculated as follows (1):
s1=v0×t+v1×t+····+vn×t (1)
Wherein:
s1The strip steel head that thickens goes out the length (m) of F7 rack；
v0Initial velocity (m/s), the initial velocity be setting strip threading speed, be it is manually given, give according to
According to be mainly to ensure that strip steel head temperature can reach properties of product requirement temperature (relationship of threading speed and temperature is to pass through
What a series of models and formula were calculated, this is the prior art, according to the reality of the technique of design product of the present invention and equipment
Situation, the v in the solution of the present invention0Initial velocity is as a given boundary condition, value range 2-20m/s)；
v1The speed (m/s) of-the 1 scan period, since going out after F7 rack strip steel head according to one it is fixed when
Between interval delay acquire the speed of last rack in real time, the 1st scanning scan period referred to that the 1st fixed time interval delay obtained
The real-time speed data, v1Value range be 2-20m/s；
vnThe speed (m/s) of-the n-th scan period, since going out after F7 rack strip steel head according to one it is fixed when
Between interval delay acquire the speed of last rack in real time, the n-th scan period referred to the speed of the F7 acquired after n-th of set time,
vnValue range be 2-20m/s；N is the last one scan period number required for going out F7 rack from strip in real time；
The t- scan period is constant；Scan period is exactly to be delayed to obtain real time data according to fixed time interval, this
A is a constant of the reaction time setting of automatic control system integrated system response time and equipment, which is usually
0.02 second (s).
S5, the length s that the strip steel head that thickens calculated to Real-time Feedback LEVEL1 goes out F7 rack differentiate.
S6, when judgement s is less than required head length L in step S51When, (Monitor Process is a kind of routine to Monitor Process
Control technology) according to head thickness setting value carry out uniform thickness feedback control, that is, the thickness control of head uniform thickness section utilizes monitoring
The feedback of AGC realizes that Monitor Process actual measurement head goes out the thickness of F7 rack, as the head thickness h of actual measurement1Less than set head
When portion's thickness setting value, F5-F7 rack starts upper lift roll gap；On the contrary, as the head thickness h of actual measurement1Greater than set head
When thickness setting value, F5-F7 rack starts to push roll gap, until the head thickness h of actual measurement1It is set equal to set head thickness
When definite value, the stability contorting to head equal thickness section is realized.
S7, when judgement s is equal to required head length L in step S51When, the length control of head uniform thickness section terminates；
Into the segment length control that thickens.The length control for the section that thickens and thickness control are core of the invention technology, the length for the section that thickens
Target is calculated using constancy of volume principle, thicken section according to the thickness of size of plate blank and finished product, width dimensions requirement
Length L2It is that formula (2) is calculated as follows to obtain:
Wherein:
H- slab thickness (m)；
W- width of plate slab (m)；
L- slab length (m)；(H, W, L are known data)；
h1Head thickness (m)；
L1Head length (m)；
L2Thicken segment length (m)；
h3Tail portion thickness (m)；
L3Tail length (m)；
W1Finished product thickens strip width (m), finger portion, the section that thickens, of same size, the on-demand required value of tail portion.
Whether S8, the judgement section that thickens terminate, and the physical length control for the section that thickens goes out the length after F7 rack according to strip steel head
Degree tracking feedback realizes that F7 rack is stung after steel shown in the following principle such as formula (3) of strip length:
s2=v0×t+v1×t+····+vn×t-L1 (3)
Wherein: s2Thicken section strip steel real time length (m)；
v0Initial velocity (m/s)；
v1The speed (m/s) of-the 1 scan period, v1Value range be 2-20m/s；
vnThe speed (m/s) of-the n-th scan period；
The t- scan period (s) is constant, generally takes 0.02s；
L1Head length (m).
When thickeing, section is not finished, and continues back at above-mentioned steps S7.
In the step S7-S8, section thickness that thickens need to be controlled, the thickness for the section that thickens must satisfy in the section that thickens
Length L2Within carry out, the thickness of the section that thickens is from head thickness h1Continuously thicken to tail portion thickness h3, using in the segment length L that thickens2
Within range, by way of becoming the target thickness of monitoring feedback AGC in real time, realized by the feedback of Monitor Process.The section that thickens monitoring
The thickness targets of AGC are a function, and what which characterized is the thickness targets at section different location that thickens, and are called and thicken
Section real-time target thickness h2.According to the control length for the section that thickens and the absolute magnitude to thicken, the prison on per unit length can be calculated
Control the target thickness change rate of AGC.
Thicken the thickness change of section Monitor Process are as follows:
h2=h1+δ×s2
Wherein: δ-thickens a section target thickness change rate；
h2Thicken a section real-time target thickness (m)；
s2Thicken section strip steel real time length (m)；
L1Head length (m)；
L2Thicken segment length (m)；
h3Tail portion thickness (m)；
L3Tail length (m)；)
S9, when thickeing, section has terminated, that is, when the length that the strip that Real-time Feedback calculates goes out F7 rack subtracts head length L1
The section strip steel real time length s that thickens afterwards2Equal to the required segment length L that thickens2When, the segment length that thickens control and thickeing has controlled
At continuing to carry out length and thickness control, tail length L to tail portion3It determines on demand, the length of ordinary circumstance lower tail uniform thickness section
Degree is all shorter, does not influence the section that thickens after the main needs for considering user's welding and the excision of production process tail part of band steel defect
Normal use.
The length control of tail portion goes out the length tracking feedback realization after F7 rack according to strip steel head, and F7 rack is stung after steel
The following principle of strip length is as follows:
s3=v0×t+v1×t+····+vn×t-L1-L2 (5)
Wherein: s3Tail portion strip real time length (m)；
v0Initial velocity (m/s)；
v1The speed (m/s) of-the 1 scan period；
vnThe speed (m/s) of-the n-th scan period；
The t- scan period (s) is constant, generally takes 0.02s；
L1Head length (m)；
L2Thicken segment length (m)；
When the length that the strip that Real-time Feedback calculates goes out F7 rack subtracts head length L1And the segment length L that thickens2Tail portion afterwards
Strip real time length s3Equal to required tail length L3When, tail length control is completed, tail length control period, tail portion
The control of uniform thickness section it is similar to the control of the uniform thickness section on head, the thickness control of tail portion uniform thickness section also with Monitor Process feedback
It realizes (Monitor Process is a kind of conventional mature control technology), Monitor Process actual measurement strip steel head goes out the thickness h of F7 rack, works as reality
The thickness h of survey is less than required tail portion thickness h3When, F5-F7 rack starts upper lift roll gap；On the contrary, when the thickness h of actual measurement is big
In required tail portion thickness h3When, F5-F7 rack starts to push roll gap, until the actual measurement thickness h of tail portion is equal to required
Tail portion thickness h3When, realize the stability contorting to tail portion uniform thickness section.At this point, completing the control that thickens of overall length strip.
Embodiment:
H- slab thickness (m), W- width of plate slab (m), L- slab length (m), h1Head thickness (m), L1Head length
(m), L2Thicken segment length (m), h3Tail portion thickness (m), L3Tail length (m), W1Finished product thickens strip width (m).
Size of plate blank: H=230mm (0.230m)；L=10m；W=1300mm (1.300m)；
Finished size: h1=4.05mm (0.00405m)；L1=50m；L3=60m；h3=4.55mm (0.00455m)；W1
=1200mm (1.200m)；
(1) head roll gap is set
The setting of head thickness uses the setting of Level2 model, may insure the balance of second flow when threading in this way, mentions
The stability of high threading.Level2 is according to the thickness requirement h of strip steel head1=4.05mm (0.00405m) carries out each rack in head
Initial roll gap and speed setup algorithm, after the completion of setting Level2 by head roll gap and speed issue Level1 execute.
(2) head uniform thickness section roll control
It is L that user, which requires the control length of head equal thickness section,1=50m, thickness h1=4.05mm (0.00405m)；So:
Head length are as follows: L1=50m；
Head thickness setting value are as follows: h1=4.05mm (0.00405m)；
After strip steel head goes out F7 rack, Level1 grades of computers calculate the length that measurement strip steel head goes out F7 rack in real time
Degree, in head L1Within=50m, Monitor Process is according to h1The target of=4.05mm (0.00405m) carries out feedback control, works as actual measurement
When thickness is greater than 4.05mm (0.00405m), F5-F7 rack pushes roll gap, on the contrary, when actual measurement thickness is less than 4.05mm
When (0.00405m), F5-F7 rack lifts roll gap, finally ensures to survey thickness hit head thickness setting value.
(3) segment length that thickens control
According to size of plate blank and finished product thickness, width dimensions, using constancy of volume principle, the length for the section that thickens in the middle part of calculating
Degree, while the control length for the section that continuously thickend according to middle part and the absolute magnitude to thicken, Monitor Process on calculating per unit length
Target thickness change rate.
The length computation for the section that thickens is as follows:
After strip steel head goes out F7 rack, Level1 grades of computers calculate the length that measurement strip steel head goes out F7 rack in real time
Degree, for middle part thickens section, the measured length of middle part subtracts head L1The length of=50m is calculated and is controlled.
(4) thicken a section thickness control
After the length for the section that thickens in the middle part of calculating, unit length direction can be calculated according to the amount of thickeing for the section that thickens
On thickness targets.
The thickness change of middle part Monitor Process are as follows:
The target thickness function of middle part Monitor Process are as follows:
h2=h1+δ×s2=4.05+1.066 × s2 (8)
Wherein s2--- range be 0-469 meters；
Middle part physical length calculates following (initial velocity v0=8m/s):
s2=v0×t+v1×t+····+vn×t-L1=8t+v1t+····+vnt-50 (9)
By above-mentioned calculating and control, the feedback target value of Monitor Process on section per unit length that thickens can be calculated, it is real
In the control process of border, the practical thickness of per unit length is made using the feedback function of AGC according to the tracking to strip steel head thickness
Degree reach target thickness, equally, within section 0-469 meters of range that thicken, Monitor Process according to different location different-thickness target
It is controlled, when surveying target thickness of the thickness greater than the position, F5-F7 rack pushes roll gap, on the contrary, when actual measurement thickness is small
When the target thickness of the position, F5-F7 rack lifts roll gap, final to realize that different location corresponds to different thickness, realizes continuous
Thicken process.
(5) the length control of tail portion equal thickness section,
The length of required tail portion uniform thickness section is 60 meters, specific as follows with a thickness of 4.55mm (0.00455m):
The length of tail portion equal thickness section are as follows: L3=60m；
The thickness of tail portion equal thickness: h3=4.55mm (0.00455m)；
The length control of tail portion equal thickness section goes out the length tracking feedback realization after F7 rack, F7 rack according to strip steel head
The following principle for stinging the later strip length of steel is as follows:
s3=v0×t+v1×t+····+vn×t-L1-L2 (10)
=8t+v1t+····+vnt-50-469
=8t+v1t+····+vnt-519
Wherein: s3--- tail portion uniform thickness segment length (m)；
v0--- initial velocity (m/s)；It is set as 8 meter per seconds；
v1--- the speed (m/s) of the 1st scan period；
vn--- the speed (m/s) of the n-th scan period；
T --- the scan period (s) is constant；
L1 --- head uniform thickness segment length (m)；
L2 --- middle part thickens segment length (m)；
When the strip that Real-time Feedback calculates goes out the length s of F7 rack3When requiring L3=60 meters equal to user, tail portion uniform thickness section
Length control terminate；
Similar to head uniform thickness section, the thickness control of tail portion uniform thickness section realizes (monitoring also with the feedback of Monitor Process
AGC is a kind of conventional mature control technology), Monitor Process actual measurement strip steel head goes out the thickness h of F7 rack, when the thickness h of actual measurement
The tail portion thickness h required less than user3When=4.55mm (0.00455m), F5-F7 rack starts roll gap of appearing on the stage；On the contrary, when real
The thickness h of survey is greater than the tail portion thickness h that user requires3When=4.55mm (0.00455m), F5-F7 rack starts to push roll gap,
Until the actual measurement thickness h of tail portion3The tail portion thickness h required equal to user3When=4.55mm (0.00455m), realize to tail portion etc.
The stability contorting of thickness section.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate it is of the invention
Purpose, and it is not used as limitation of the invention, as long as within the essential scope of the present invention, the change to embodiment described above
Change, modification will all be fallen in the scope of the claims of the invention.
Claims (7)
1. a kind of hot-strip production method of overall length thickness consecutive variations, the hot-strips of the overall length thickness consecutive variations by
Head, the section that thickens and tail portion composition, the head are the identical head uniform thickness section of thickness, and the tail portion is the identical tail portion of thickness
Uniform thickness section, and tail portion thickness G T.GT.GT head thickness, the section that thickens are between head and tail portion, connect with a thickness of from head thickness
It is continuous to be incremented to tail portion thickness；It is characterized in that, the production method comprises the steps of:
S1 sets the head thickness setting value for the strip that thickens using process computer LEVEL2 model, according to head thickness automatically
Setting value calculates the initial roll gap and initial velocity of this 7 finishing rolling mills of mm finishing mill unit F1-F7 automatically；
After the completion of S2, process computer LEVEL2 set head thickness setting value, by the initial roll gap and initial velocity of each rack
Issue primary computer LEVEL1 execution；
S3, F1-F7 rack sting steel according to given initial roll gap and speed completion, it is ensured that the head thickness h for the strip that thickens1For head
Portion's thickness setting value；
S4, to head length L1It is controlled；
S5 goes out the length s of F7 rack to the calculated head Real-time Feedback LEVEL11Differentiated；
S6, when determining s in step S51Less than required head length L1When, Monitor Process is carried out according to head thickness setting value
Uniform thickness feedback control, Monitor Process actual measurement head goes out the thickness of F7 rack, as the head thickness h of actual measurement1Less than set head
When thickness setting value, F5-F7 rack starts upper lift roll gap；On the contrary, as the head thickness h of actual measurement1It is thick greater than set head
When spending setting value, F5-F7 rack starts to push roll gap, until the head thickness h of actual measurement1It is set equal to set head thickness
When value, the stability contorting to head equal thickness section is realized；
S7, when determining s in step S51Equal to required head length L1When, the length control of head uniform thickness section terminates, and enters
The segment length that thickens control；The length target for the section that thickens is to utilize body according to the thickness of size of plate blank and finished product, width dimensions requirement
Product invariance principle is calculated；
Whether S8, the judgement section that thickens terminate, the physical length control for the section that thickens gone out according to strip steel head the length after F7 rack with
Track feedback is realized, if the section that thickens is not finished, continues back at above-mentioned steps S7；
S9, when thickeing, section has terminated, and the length that the strip that Real-time Feedback calculates goes out F7 rack subtracts head length L1The section that thickens afterwards
Strip real time length s2Equal to the required segment length L that thickens2When, the segment length that thickens control and the control that thickens are completed, and are continued to tail
Portion carries out length and thickness control；Complete the control that thickens of overall length strip.
2. the hot-strip production method of overall length thickness consecutive variations as described in claim 1, it is characterised in that:
In the step S1, process computer LEVEL2 model is the workpiece thickness, width, temperature according to mm finishing mill unit entrance
Degree, the sharing of load and head thickness h for implementing each rack to thicken1Head thickness setting value is calculated, wherein head is thick
Spend h1It is exactly required finished product head thickness, distributes each milling train by setting in the production process for realizing this thickness
Thickness, finally ensure that strip finished product head thickness that last rack is shut out is equal to required head thickness h1。
3. the hot-strip production method of overall length thickness consecutive variations as described in claim 1, it is characterised in that:
In the step S4, head length control goes out the length tracking feedback realization after F7 rack according to the head for the strip that thickens,
The tracking that F7 rack stings the later strip length of steel is calculated as follows (1):
s1=v0×t+v1×t+····+vn×t (1)
Wherein:
s1The strip steel head that thickens goes out the length of F7 rack, unit m；
v0Initial velocity, unit m/s are the strip threading speed of setting, value range 2-20m/s；
v1The speed of-the 1 scan period, unit m/s, since going out after F7 rack strip steel head according to one it is fixed when
Between interval delay acquire the speed of last rack in real time, the 1st scanning scan period referred to that the 1st fixed time interval delay obtained
The real-time speed data, v1Value range be 2-20m/s；
vnThe speed of-the n-th scan period, unit m/s, since going out after F7 rack strip steel head according to one it is fixed when
Between interval delay acquire the speed of last rack in real time, the n-th scan period referred to the speed of the F7 acquired after n-th of set time,
vnValue range be 2-20m/s；N is to go out the last one scan period number required for F7 rack is completed in real time from strip；
The t- scan period is constant；Scan period is exactly to be delayed to obtain real time data according to fixed time interval, is normal
Amount is 0.02 second.
4. the hot-strip production method of overall length thickness consecutive variations as described in claim 1, it is characterised in that:
In the step S7, the segment length that thickens L2Formula is calculated as follows to obtain:
Wherein:
H- slab thickness, unit m；
W- width of plate slab, unit m；
L- slab length, unit m；
h1Head thickness, unit m；
L1Head length, unit m；
L2Thicken segment length, unit m；
h3Tail portion thickness, unit m；
L3Tail length, unit m；
W1Finished product thickens strip width, and unit m, the head, the section that thickens, the width of tail portion are all the same, on-demand required value.
5. the hot-strip production method of overall length thickness consecutive variations as described in claim 1, it is characterised in that:
In the step S8, F7 rack is stung shown in the tracking as the following formula of the later strip length of steel:
s2=v0×t+v1×t+····+vn×t-L1
Wherein: s2Thicken section strip steel real time length, unit m；
v0Initial velocity, unit m/s；
v1The speed of-the 1 scan period, unit m/s, v1Value range be 2-20m/s；
vnThe speed of-the n-th scan period, unit m/s；
The t- scan period (s) is constant, generally takes 0.02s；
L1Head length, unit m.
6. the hot-strip production method of overall length thickness consecutive variations as claimed in claim 4, it is characterised in that:
In the step S7-S8, section thickness that thickens need to be controlled, the thickness for the section that thickens meets in the segment length L that thickens2With
Interior progress, the thickness of the section that thickens is from head thickness h1Continuously thicken to tail portion thickness h3, using in the segment length L that thickens2Range with
It is interior, by way of becoming the target thickness of monitoring feedback AGC in real time, realized by the feedback of Monitor Process；Thicken section Monitor Process
Thickness targets are a function, and what which characterized is the thickness targets at section different location that thickens, and are called the section reality that thickens
When target thickness h2；According to the control length for the section that thickens and the absolute magnitude to thicken, the mesh of the Monitor Process on per unit length is calculated
Mark thickness change, the thickness change for section Monitor Process that thickens are as follows:
h2=h1+δ×s2
Wherein: δ-thickens a section target thickness change rate；
h2Thicken a section real-time target thickness, unit m；
s2Thicken section strip steel real time length, unit m；
L1Head length, unit m；
L2Thicken segment length, unit m；
h3Tail portion thickness, unit m；
L3Tail length, unit m.
7. the hot-strip production method of overall length thickness consecutive variations as described in claim 1, it is characterised in that:
In the step S9, the length control of tail portion goes out the length tracking feedback realization after F7 rack, F7 machine according to strip steel head
The following principle that frame stings the later strip length of steel is as follows:
s3=v0×t+v1×t+····+vn×t-L1-L2
Wherein: s3Tail portion strip real time length, unit m；
v0Initial velocity, unit m/s；
v1The speed of-the 1 scan period, unit m/s；
vnThe speed of-the n-th scan period, unit m/s；
The t- scan period (s) is constant, takes 0.02s；
L1Head length, unit m；
L2Thicken segment length, unit m；
When the length that the strip that Real-time Feedback calculates goes out F7 rack subtracts head length L1And the segment length L that thickens2Tail portion strip afterwards
Real time length s3Equal to required tail length L3When, tail length control is completed, tail length control period, tail portion uniform thickness
The thickness control of section is realized using the feedback of Monitor Process, and Monitor Process actual measurement strip steel head goes out the thickness h of F7 rack, works as actual measurement
Thickness h be less than required tail portion thickness h3When, F5-F7 rack starts upper lift roll gap；On the contrary, when the thickness h of actual measurement is greater than
Required tail portion thickness h3When, F5-F7 rack starts to push roll gap, until the actual measurement thickness h of tail portion is equal to required tail
Portion's thickness h3When, the stability contorting to tail portion uniform thickness section is realized, at this point, completing the control that thickens of overall length strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195644.4A CN108655182B (en) | 2017-03-29 | 2017-03-29 | A kind of hot-strip production method of overall length thickness consecutive variations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195644.4A CN108655182B (en) | 2017-03-29 | 2017-03-29 | A kind of hot-strip production method of overall length thickness consecutive variations |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108655182A CN108655182A (en) | 2018-10-16 |
| CN108655182B true CN108655182B (en) | 2019-09-20 |
Family
ID=63785694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710195644.4A Active CN108655182B (en) | 2017-03-29 | 2017-03-29 | A kind of hot-strip production method of overall length thickness consecutive variations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108655182B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110614279B (en) * | 2019-09-05 | 2020-09-18 | 北京科技大学设计研究院有限公司 | Automatic head and tail pressing control method for single-stand roughing mill |
| CN110614274B (en) * | 2019-10-16 | 2020-11-10 | 中冶南方工程技术有限公司 | Improved second flow thickness control method for single-stand reversible rolling mill |
| CN113578975B (en) * | 2021-07-21 | 2023-06-13 | 张家港扬子江冷轧板有限公司 | Method for rapidly changing specifications of acid rolling mill |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607264A (en) * | 2009-07-07 | 2009-12-23 | 东北大学 | A kind of periodic longitudinal variable-thickness strip, longitudinal variable-thickness sheet material and preparation method thereof |
| CN101890434A (en) * | 2010-07-06 | 2010-11-24 | 东北大学 | Control method for periodic variable-thickness strip rolling speed |
| JP2011147957A (en) * | 2010-01-20 | 2011-08-04 | Nippon Steel Corp | Method of controlling cold tandem rolling mill |
| CN103302094A (en) * | 2013-06-08 | 2013-09-18 | 东北大学 | Production method of transverse wedge-shaped rolled thickness-variable steel plate |
| CN104741388A (en) * | 2015-04-15 | 2015-07-01 | 东北大学 | Method for controlling fine rolling thickness of hot continuous rolling |
| CN105436210A (en) * | 2015-12-11 | 2016-03-30 | 东北大学 | Thickness-changeable rolling method for heavy and medium plate mill |
-
2017
- 2017-03-29 CN CN201710195644.4A patent/CN108655182B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607264A (en) * | 2009-07-07 | 2009-12-23 | 东北大学 | A kind of periodic longitudinal variable-thickness strip, longitudinal variable-thickness sheet material and preparation method thereof |
| JP2011147957A (en) * | 2010-01-20 | 2011-08-04 | Nippon Steel Corp | Method of controlling cold tandem rolling mill |
| CN101890434A (en) * | 2010-07-06 | 2010-11-24 | 东北大学 | Control method for periodic variable-thickness strip rolling speed |
| CN103302094A (en) * | 2013-06-08 | 2013-09-18 | 东北大学 | Production method of transverse wedge-shaped rolled thickness-variable steel plate |
| CN104741388A (en) * | 2015-04-15 | 2015-07-01 | 东北大学 | Method for controlling fine rolling thickness of hot continuous rolling |
| CN105436210A (en) * | 2015-12-11 | 2016-03-30 | 东北大学 | Thickness-changeable rolling method for heavy and medium plate mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108655182A (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103464471B (en) | Automatic gauge control (AGC) self-adaptive control method for hot rolling mill | |
| CN108655182B (en) | A kind of hot-strip production method of overall length thickness consecutive variations | |
| CN103433295A (en) | Method for controlling convexity of single-rack double-coiler aluminum hot mill | |
| CN103170508B (en) | Method for controlling width of hot rolling strip steel | |
| CN104324948B (en) | A kind of rougher of hot strip mill process rolled piece width control method | |
| CN103785692B (en) | Hot tandem produces the method for length direction different target gauge strips steel | |
| CN102407240B (en) | Method for controlling finishing elongation rate of strip steel by utilizing second flow | |
| CN104942019B (en) | A kind of cold rolling of strip steel process Automatic control method of width | |
| CN106269903B (en) | A kind of continuous hot-rolling mill roller optimal setting method | |
| CN105251778B (en) | Feedback control method for edge drop of taper work roll shifting mill (T-WRS) | |
| CN101934292A (en) | Automatic control method for camber and wedge of hot rolled strip roughing mill | |
| CN104209339A (en) | Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control | |
| CN106345819B (en) | A kind of control method of hot continuous rolling fine-rolling strip steel afterbody rolling stability | |
| CN103170506B (en) | Hot rolling and finish rolling multi-level threading speed control method | |
| CN103071683A (en) | Comprehensive adjustment rolling technology for double-frame S-shaped four-roll cold rolling mill | |
| CN103962392B (en) | A kind of continuous hot-rolling mill mm finishing mill unit Dynamic load control method | |
| CN106914495B (en) | A kind of hot-strip camber control method and system | |
| CN104772341B (en) | A kind of Optimal Setting method of hot-tandem unit roller | |
| CN103240277A (en) | Control apparatus for hot rolling line | |
| CN107127214A (en) | Cold rolled silicon steel convexity wedge shape method for dynamic setting and control | |
| CN109772896A (en) | Hot continuous rolling based on Smith Prediction Control becomes target flatness degree control method | |
| CN110614274B (en) | Improved second flow thickness control method for single-stand reversible rolling mill | |
| CN106345818A (en) | Plate shape control method of special steel | |
| CN103464470B (en) | Hot continuous rolling necking compensation control method | |
| CN108057721B (en) | A kind of method for controlling shape when cold-rolling practice production aluminum alloy plate materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |