CN110270591A - Pipe line steel batches control method - Google Patents
Pipe line steel batches control method Download PDFInfo
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- CN110270591A CN110270591A CN201910499605.2A CN201910499605A CN110270591A CN 110270591 A CN110270591 A CN 110270591A CN 201910499605 A CN201910499605 A CN 201910499605A CN 110270591 A CN110270591 A CN 110270591A
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- strip
- pinch roller
- pipe line
- roll
- control method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a kind of pipe line steels to batch control method, is related to technical field of steel rolling, which comprises before the head of strip enters pinch roller, the opening degree of roll gap is set smaller than to the setting value S of the steel strip thickness by position control system；When the head of the strip enters the pinch roller, the position control system is converted into control pressurer system and the Withdrawal roll pressure is set as pressure set points by the control pressurer system；When the pinch roller is left in the tail portion of the strip, the control pressurer system is converted into position control system and the opening degree of the roll gap is set as the setting value S by the position control system.By the conversion between position control system and control pressurer system strip is crimped, and the head of strip enters and when tail portion of strip is left reduces piling of steel risk, to improve rhythm of production and stability.
Description
Technical field
This application involves technical field of steel rolling more particularly to a kind of pipe line steel to batch control method.
Background technique
Pipe line steel is primarily referred to as the steel grade for having particular/special requirement for one kind used in the pipelines such as transfer oil, natural gas,
According to thickness and the difference being subsequently formed etc., can be produced by hot tandem, steekle mill or heavy and medium plate mill, it is welded
The large-diameter steel pipe of formation.
Currently, think gauge pipeline steel product is because width is big, intensity is big, in production, because of strip steel head nose, strip steel head
Tracking is abnormal easily to cause coiling machine to fail to bite piling of steel accident, and piling of steel not only influences yield and cost, but also because of piling of steel risk
And rhythm of production is deliberately reduced, more restrict the rhythm of production of hot rolling.
Apply for content
The embodiment of the present application batches control method by providing a kind of pipe line steel, to solve in the prior art due to strip
Head nose, strip steel head tracking exception easily cause coiling machine to fail to bite piling of steel accident, cause due to piling of steel risk deliberately
The technical issues of reducing rhythm of production.
To solve the above-mentioned problems, the embodiment of the present application provides a kind of pipe line steel and batches control method, applied to batching
Machine, comprising:
Before the head of strip enters pinch roller, the opening degree of roll gap is set smaller than the band by position control system
The setting value S of steel thickness；
Wherein, the setting value S is determined by formula -1,
S=H-H0Formula -1
In formula -1, S-pinch roller opening degree, mm；H-steel strip thickness, mm；H0-fixed value, mm.
When the head of the strip enter the pinch roller when, the position control system be converted into control pressurer system and
The Withdrawal roll pressure is set as pressure set points by the control pressurer system, wherein the pressure set points are true by formula -2
It is fixed,
FPr, rep=B × H | σpr-σma|α/μRBFormula -2
If qp > 0.5, α=qp；If qp≤0.5, α=1-qp.
In formula 2: Fpr.ref-pressure set points, kN；H-steel strip thickness, mm；B-strip width, mm；σ pr-volume
Take the unit tension between machine pinch roller and finishing mill；Unit tension of the σ ma-between coiler pinch-roll and mandrel；μRB—
0.1~0.25；Qp-coiler pinch-roll torque coefficient.
When the pinch roller is left in the tail portion of the strip, the control pressurer system be converted into position control system and
The opening degree of the roll gap is set as the setting value S by the position control system.
In a kind of specific embodiment, when the pressure of the pinch roller reaches upper limit value, extends the roll gap and set
Surely what is increased lifts the time.
In a kind of specific embodiment, when the strip is there are when shape wave warpage, before reducing the strip coiling
Pinch roller speed.
In a kind of specific embodiment, the movement velocity of the time and the strip marked time in advance according to coiling machine,
Extend Wrapping Roll Step-by-step control uncompensation distance.
In a kind of specific embodiment, when rolling thickness (18,20] mm when, extend the Wrapping Roll Step-by-step control
Uncompensation distance 200mm；Thickness (20,21] mm when, extend the Wrapping Roll Step-by-step control uncompensation distance 250mm；When thickness exists
Extend Wrapping Roll Step-by-step control uncompensation distance 280mm when 21mm or more.
In a kind of specific embodiment, when the head of the strip is before entering the pinch roller, by HMD detection letter
Number and calculate the speed of the strip；After the pinch roller stings steel, the lower pinch roller of head tracking of the strip
Speed is modified, and starts to execute pressure control after the head tracking of the strip crosses Wrapping Roll.
In a kind of specific embodiment, the upper and lower surface temperature difference of the strip is within 10 ° before crimping.
In a kind of specific embodiment, the fixed value H0For 0.1~0.2mm.
In a kind of specific embodiment, roughing uses 3+5 passage.
In a kind of specific embodiment, roughing outlet temperature is controlled within the scope of 930~950 DEG C.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects
Fruit:
The embodiment of the present application batches control method by providing a kind of pipe line steel, before the head of strip enters pinch roller or
When pinch roller is left in the tail portion of strip, the opening degree of roll gap is set as setting value S, and setting value S is less than steel strip thickness, strip
Head bitten by pinch roller or the tail portion of strip is bitten by pinch roller, ensure that the head of strip enters and the tail portion of strip
Normal work when leaving.When pinch roller enters pinch roller, control pressurer system is converted by position control system at this time, it will
Withdrawal roll pressure is set as pressure set points, enables strip normal rolled.According to different working conditions, controlled by position
Conversion between system processed and control pressurer system enables strip to crimp, and the head of strip enter and strip tail portion from
Piling of steel risk is reduced by pinch roller occlusion when opening, to improve rhythm of production and stability.
Above description is only the general introduction of technical scheme, in order to better understand the technological means of the application,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the application can
It is clearer and more comprehensible, below the special specific embodiment for lifting the application.
Detailed description of the invention
Fig. 1 is that a kind of pipe line steel batches control method flow chart in the embodiment of the present invention；
Fig. 2 is a kind of flow diagram that pipe line steel batches in the embodiment of the present invention.
Icon: 100- strip；300- pinch roller；500- Wrapping Roll.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, implement below in conjunction with the present invention
The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below to protect
The scope of the present invention of shield, but it is merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, the interaction that can be connection or two elements inside two elements is closed
System；It can be electric connection, be also possible to be electrically connected.It for the ordinary skill in the art, can be according to specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
The embodiment of the present application provides a kind of pipe line steel and batches control method, to solve in the prior art because of piling of steel risk
And the technical issues of deliberately reducing rhythm of production, more restricting the rhythm of production of hot rolling.
In order to solve the above-mentioned technical problem, technical solution general thought provided by the present application is as follows: the head of strip into
Enter before pinch roller or when pinch roller is left in the tail portion of strip, the opening degree of roll gap is set as setting value S, and setting value S is less than
The head of steel strip thickness, strip is bitten by pinch roller or the tail portion of strip is bitten by pinch roller, ensure that the head of strip into
Enter normal work when leaving with the tail portion of strip.When pinch roller enters pinch roller, it is converted at this time by position control system
Withdrawal roll pressure is set as pressure set points by control pressurer system, enables strip normal rolled.According to different work
State enables strip to crimp by the conversion between position control system and control pressurer system, and the head of strip into
Enter and be snapped into when being left with the tail portion of strip, reduce piling of steel risk, to improve rhythm of production and stability.
Technical scheme is described in detail below by attached drawing and specific embodiment, it should be understood that the application
Specific features in embodiment and embodiment are the detailed description to technical scheme, rather than to present techniques
The restriction of scheme, in the absence of conflict, the technical characteristic in the embodiment of the present application and embodiment can be combined with each other.
Embodiment one
Fig. 1 shows the flow diagram that a kind of pipe line steel batches control method referring to FIG. 1-2, and Fig. 2 shows one kind
The flow diagram that pipe line steel batches.
The embodiment of the present invention provides a kind of pipe line steel and batches control method, which comprises
Step 100: before the head of strip 100 enters pinch roller 300, being set the opening degree of roll gap by position control system
The fixed setting value S at less than 100 thickness of strip；
Wherein, the setting value S is determined by formula -1,
S=H-H0Formula -1
In formula -1,300 opening degree of S-pinch roller, mm；100 thickness of H-strip, mm；H0-fixed value, mm.Pinch roller
The factor that 300 opening degrees mainly consider is exactly 100 thickness of strip, is adjusted by position control system according to 100 thickness of strip, roll gap
Opening degree be less than 100 thickness of strip, to guarantee that the head of strip 100 can be bitten when entering pinch roller 300.
In a kind of specific embodiment, fixed value H0Opening degree for 0.1~0.2mm, that is, roll gap is slightly less than
100 thickness of strip, so as to so that the head of strip 100 can more smoothly enter pinch roller 300 and can be bitten.
100 head tracking of strip is calculated by 300 speed of bottom pinch roll, when strip 100 there are when warpage by
In intensity height, shape wave position jacks up top pinch roll 300 when passing through pinch roller 300, causes bottom pinch roll 300 cannot be with strip
100 lower surfaces effectively contact, faster than 100 speed of strip so as to cause 300 actual speed of bottom pinch roll.It is quasi- in order to improve tracking
True property, in embodiments of the present invention, when there are when shape wave warpage, reduce the pinch before the strip 100 batches for the strip 100
300 speed of roller.For example, 300 speed of pinch roller reduces by 8% before strip 100 is batched, by 300 velocity compensation of pinch roller, improve
Track accuracy.
It, can be according to the fortune for the time and the strip 100 that coiling machine is marked time in advance in a kind of specific embodiment
Dynamic speed, extends 500 Step-by-step control uncompensation distance of Wrapping Roll.
The purpose of 500 Step-by-step control of Wrapping Roll is that 100 head of heavy gauge steel strip and Wrapping Roll 500 is avoided to hit, to prolong
Long 500 service life of Wrapping Roll, while can avoid head impression defect (tongue fur print).The Step-by-step control of Wrapping Roll 500 is to pass through
100 head tracking of strip is executed, when head is before pinch roller 300, by HMD (cold/hot metal detector) detection signal and
Calculate the speed of strip 100；After the pinch roller 300 stings steel, the lower pinch roller of head tracking of the strip 100
300 speed is modified, and starts to execute pressure control after the head tracking of the strip 100 crosses Wrapping Roll 500.
100 head tracking of strip is calculated by 300 speed of bottom pinch roll, when strip 100 there are when shape wave by
In intensity height, shape wave position jacks up top pinch roll 300 when passing through pinch roller 300, causes bottom pinch roll 300 cannot be with strip
100 lower surfaces effectively contact, faster than 100 speed of strip so as to cause 300 actual speed of bottom pinch roll, lead to Wrapping Roll 500
It marks time in advance.
Therefore, increase by 500 Step-by-step control uncompensation distance of Wrapping Roll, tracking is avoided to lead to the head bending of strip 100 in advance
The case where appearance.
In a kind of specific embodiment, when rolling thickness (18,20] mm when, extend the Wrapping Roll 500 and mark time
Control uncompensation distance 200mm；Thickness (20,21] mm when, extend the 500 Step-by-step control uncompensation distance 250mm of Wrapping Roll；When
Thickness extends 500 Step-by-step control uncompensation distance 280mm of Wrapping Roll in 21mm or more.To those skilled in the art, may be used
With the 100 running speed degree of time and strip marked time in advance according to different coiling machines, the distance marked time in advance is estimated, then surveyed by practical
Examination determines reasonable or even optimal command range.
It, before crimping can be by the upper and lower surface temperature difference of the strip 100 in order to reduce the nose degree on 100 head of strip
Within 10 °.
In specific setting, the control of roughing outlet temperature is within the scope of 930~950 DEG C, to guarantee that interstand cooling water is cooling
Ability is enough.For example, being provided with 5 racks in embodiments of the present invention.Roughing outlet temperature is controlled in 930~950 DEG C of ranges
It is interior to guarantee that 5 interstand cooling water cooling capacities are enough.
Roughing operative employee optimizes the adjustment of milling train SKL value, solidifies SKL when a set of production flow line steel by groping to test
Value, it is good and stable that slab kowtows the control of nose situation.Since milling train SKL value is related with equipment itself, its SKL value of different milling trains
It can be different.
Step 200: when the head of the strip 100 enters the pinch roller 300, the position control system is converted into
300 pressure of pinch roller is set as pressure set points by control pressurer system and the control pressurer system, wherein the pressure
Power setting value is determining by formula -2,
FPr, rep=B × H | σpr-σma|α/μRBFormula -2
If qp > 0.5, α=qp；If qp≤0.5, α=1-qp.
In formula 2: Fpr.ref-pressure set points, kN；100 thickness of H-strip, mm；
100 width of B-strip, mm；Unit tension of the σ pr-between coiler pinch-roll 300 and finishing mill；σ ma-volume
Take the unit tension between machine pinch roller 300 and mandrel；RB -0.1~0.25 μ；300 torque coefficient of qp-coiler pinch-roll.
Inventor has found that the principal element for influencing 300 working condition of pinch roller includes that strip 100 is wide in long-term research
Unit tension, coiler pinch-roll 300 between degree, coiler pinch-roll 300 and finishing mill and the unit tension between mandrel
And 300 torque coefficient of coiler pinch-roll.
For this purpose, in embodiments of the present invention, and on the basis of considering above-mentioned factor, propose that the calculating of pressure set points is public
Formula, according to unit tension, coiler pinch-roll 300 and the core between 100 width of strip, coiler pinch-roll 300 and finishing mill
Unit tension and 300 torque coefficient of coiler pinch-roll between axis determine suitable pressure set points, are wanted with meeting curling
It asks.
Since the head strength of think gauge pipeline steel strip is higher, 300 pressure of pinch roller is easy to reach upper limit value, reaches the upper limit
After value, pinch roller 300 can be lifted, and pinch roller 300 cannot effectively be bent it.For this purpose, specific in one kind of the invention
In embodiment, when the pressure of the pinch roller 300 reaches upper limit value, extend the roll gap setting increase lifts the time.
For example, what roll gap setting increased lifts the time by original 0.2s extension when sending the pressure of roller to reach upper limit value
To 1s, avoid the setting mutation of 300 roll gap of pinch roller that pinch roller 300 is caused to send steel reduced capability.
Step 300: when the pinch roller 300 is left in the tail portion of the strip 100, the control pressurer system is converted into
The opening degree of the roll gap is set as the setting value S by position control system and the position control system.
The step 300 is substantially identical as step S100, by the way that control pressurer system is switched to position control system, and makes
The opening degree for obtaining roll gap is set as the setting value S, when pinch roller 300 is left in the tail portion of strip 100, the tail portion of strip 100
It is bitten by pinch roller 300, pinch roller 300 is smoothly detached under the occlusion of pinch roller 300, ensure that when leaving of strip 100
It works normally.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects
Fruit:
The embodiment of the present application batches control method by providing a kind of pipe line steel, enters pinch roller on the head of strip 100
Before 300 or when pinch roller 300 is left in the tail portion of strip 100, the opening degree of roll gap is set as setting value S, and setting value S is less than
100 thickness of strip, the head of strip 100 is bitten by pinch roller 300 or the tail portion of strip 100 is bitten by pinch roller 300, guarantees
The normal work when head of strip 100 enters and the tail portion of strip 100 is left.Enter pinch roller 300 in pinch roller 300
When, control pressurer system is converted by position control system at this time, 300 pressure of pinch roller is set as pressure set points, so that
Strip 100 being capable of normal rolled.According to different working conditions, pass through turning between position control system and control pressurer system
It changes and strip 100 is crimped, and the head of strip 100 enters and when tail portion of strip 100 is left is snapped into, and reduces heap
Steel risk, to improve rhythm of production and stability.By increasing by 500 Step-by-step control uncompensation distance of Wrapping Roll, tracking is avoided to mention
Before the case where causing the head bending of strip 100 to occur.When the pressure of the pinch roller 300 reaches upper limit value, described in extension
What roll gap setting increased lifts the time, avoids the setting mutation of 300 roll gap of pinch roller that pinch roller 300 is caused to send steel reduced capability.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of pipe line steel batches control method, it is applied to coiling machine characterized by comprising
Before the head of strip enters pinch roller, the opening degree of roll gap is set smaller than the strip thickness by position control system
The setting value S of degree；
Wherein, the setting value S is determined by formula -1,
S=H-H0
Formula -1
In formula -1, S- pinch roller opening degree, mm；H- steel strip thickness, mm；H0- fixed value, mm；
When the head of the strip enters the pinch roller, the position control system is converted into control pressurer system and described
The Withdrawal roll pressure is set as pressure set points by control pressurer system, wherein and the pressure set points are determining by formula -2,
FPr, rep=B × H | σpr-σma|α/μRB
Formula -2
If qp > 0.5, α=qp；If qp≤0.5, α=1-qp；
In formula 2: Fpr.ref- pressure set points, kN；H- steel strip thickness, mm；B- strip width, mm；σ pr- coiling machine pinches
Unit tension between roller and finishing mill；Unit tension between σ ma- coiler pinch-roll and mandrel；RB-0.1~0.25 μ；
Qp- coiler pinch-roll torque coefficient；
When the pinch roller is left in the tail portion of the strip, the control pressurer system is converted into position control system and described
The opening degree of the roll gap is set as the setting value S by position control system.
2. pipe line steel according to claim 1 batches control method, which is characterized in that when the pressure of the pinch roller reaches
When upper limit value, extend the roll gap setting increase lifts the time.
3. pipe line steel according to claim 1 batches control method, which is characterized in that when there are shape wave warpages for the strip
When, the pinch roller speed before reducing the strip coiling.
4. pipe line steel according to claim 1 batches control method, which is characterized in that according to coiling machine mark time in advance when
Between and the strip movement velocity, extend Wrapping Roll Step-by-step control uncompensation distance.
5. pipe line steel according to claim 4 batches control method, which is characterized in that when rolling thickness (18,20] mm
When, extend the Wrapping Roll Step-by-step control uncompensation distance 200mm；Thickness (20,21] mm when, extend the Wrapping Roll and mark time control
Uncompensation distance 250mm processed；Extend Wrapping Roll Step-by-step control uncompensation distance 280mm when thickness is in 21mm or more.
6. pipe line steel according to claim 1 batches control method, which is characterized in that when the head of the strip is entering
Before the pinch roller, by the speed of HMD detection signal and the calculating strip；After the pinch roller stings steel, the strip
Head tracking is modified with the speed of the lower pinch roller, starts to execute pressure after the head tracking of the strip crosses Wrapping Roll
Power control.
7. pipe line steel according to claim 1 batches control method, which is characterized in that the strip is upper and lower before crimping
Surface temperature difference is within 10 °.
8. pipe line steel according to claim 1 batches control method, which is characterized in that the fixed value H0For 0.1~
0.2mm。
9. pipe line steel according to claim 1 batches control method, which is characterized in that roughing uses 3+5 passage.
10. pipe line steel according to claim 9 batches control method, which is characterized in that roughing outlet temperature is controlled 930
Within the scope of~950 DEG C.
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| CN201910499605.2A CN110270591A (en) | 2019-06-11 | 2019-06-11 | Pipe line steel batches control method |
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| CN201910499605.2A CN110270591A (en) | 2019-06-11 | 2019-06-11 | Pipe line steel batches control method |
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| CN111330974A (en) * | 2020-03-13 | 2020-06-26 | 江苏沙钢集团有限公司 | Hot continuous rolling production method for thick X70 pipeline steel coil |
| CN112404141A (en) * | 2020-10-20 | 2021-02-26 | 包头钢铁（集团）有限责任公司 | Effective method for solving indentation problem in hot rolling coiling |
| CN113843303A (en) * | 2021-09-02 | 2021-12-28 | 北京科技大学 | Method for realizing stepping control function of wrapper roller of coiling machine |
| CN113877968A (en) * | 2020-07-01 | 2022-01-04 | 宝山钢铁股份有限公司 | Method for preventing width fixing machine from slipping |
| CN114178317A (en) * | 2021-11-16 | 2022-03-15 | 首钢智新迁安电磁材料有限公司 | Coiling control method, coiling control device, coiling control medium and computer equipment |
| CN114433639A (en) * | 2022-03-14 | 2022-05-06 | 武汉钢铁有限公司 | Production method capable of reducing flying and warping of ultrathin strip steel on CSP production line |
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