CN107377633B - A kind of hot rolling tin plate twill defects controlling and monitoring method - Google Patents
A kind of hot rolling tin plate twill defects controlling and monitoring method Download PDFInfo
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- CN107377633B CN107377633B CN201710552527.9A CN201710552527A CN107377633B CN 107377633 B CN107377633 B CN 107377633B CN 201710552527 A CN201710552527 A CN 201710552527A CN 107377633 B CN107377633 B CN 107377633B
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- strip
- pinch roller
- twill
- flipper guide
- pressure
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- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
Abstract
The invention discloses a kind of hot rolling tin plate twill defects controlling methods, belong to twill control technology field.The hot rolling tin plate twill defects controlling method the following steps are included: strip from finishing mill through runout table, enter flipper guide；When strip steel head reaches the flipper guide, PLC sends pre-pair signal to flipper guide, and flipper guide carries out pre-pair to strip；Strip after pre-pair enters mandrel by pinch roller, the Wrapping Roll of coiling machine and is batched；It batches rear mandrel to start to expand, PLC is lifted to pinch roller, Wrapping Roll and flipper guide sending action signal, first pinch roller, and Wrapping Roll is opened later, and then flipper guide executes pressure control to strip.Hot rolling tin plate twill defects controlling method of the present invention can effectively reduce the proportion and defect length of twill defect.
Description
Technical field
The present invention relates to twill control technology field, in particular to a kind of hot rolling tin plate twill defects controlling method.
Background technique
Hot rolling tin plate twill defect is a kind of common mass defect, is concentrated mainly on strip end to end within the scope of 100m,
Because tin plate primary thickness is in 2.0mm range, camber is larger end to end and easily goes out in layer cold area domain no-station pole canopy end to end
Shape wave phenomenon caused by existing inhomogeneous cooling, strip by the extrusion deformation of flipper guide and by pinch roller and help volume in coiling process
Cause twill defect to occur after the rolling of roller, after this defect flows to lower process, will affect rear road cold rolling process rolling stability,
Surface quality, lumber recovery etc. are affected to cold rolling yield and quality.
Summary of the invention
The present invention provides a kind of hot rolling tin plate twill defects controlling method, solves or part solves the prior art
Middle strip is in coiling process by the extrusion deformation of flipper guide and by leading to twill defect after the rolling of pinch roller and Wrapping Roll
The technical issues of generation.
In order to solve the above technical problems, the present invention provides a kind of hot rolling tin plate twill defects controlling methods, including
Following steps: strip, through runout table, enters flipper guide from finishing mill；When strip steel head reaches flipper guide, PLC is led to side
Plate sends pre-pair signal, and flipper guide carries out pre-pair to strip；Strip after pre-pair by the pinch roller of coiling machine, help volume
Roller enters mandrel and is batched；Rear mandrel is batched to start to expand, PLC to pinch roller, Wrapping Roll and flipper guide sending action signal,
Pinch roller lifts first, and Wrapping Roll is opened later, and then flipper guide executes pressure control to strip.
Further, when strip steel head reaches flipper guide, it includes: to lead in side that PLC, which sends pre-pair signal to flipper guide,
Thermal sensor is provided at plate, when strip steel head reaches flipper guide, thermal sensor sends heat inspection signal to PLC, examines according to heat
Signal, PLC send pre-pair signal to flipper guide.
Further, batching rear mandrel to start expansion includes: after crimping 5 circle on mandrel when strip, and mandrel starts to expand.
Further, batch circle number of the strip on mandrel is calculated by strip winding mandrel length, works as strip steel head
Start to calculate when into pinch roller, strip length L=strip conveying speed V × strip steel head passes through the time T of pinch roller, volume
Take circle number=strip length/mandrel perimeter.
Further, pinch roller lifts first, and Wrapping Roll is opened later, and then flipper guide executes pressure control packet to strip
Include: pinch roller lifts after 0.1s, and Wrapping Roll is opened after 0.3s, and guide plate executes pressure control to strip on rear side of 0.5s.
Further, pinch roller lifts first further include: when strip steel head enters pinch roller, is mounted on control pinch roller
Displacement sensor in the hydraulic cylinder of lifting measures the practical roll gap of pinch roller, and practical roll gap signal is sent to by displacement sensor
PLC, the variation that real time monitoring pinches roller gap judge that twill defect occurs in strip when roll gap variable quantity is more than 0.3mm；
When sending twill defect, the position of twill defect is determined.
Further, the variation that real time monitoring pinches roller gap includes: after entering 8 meters of pinch roller length with strip steel head
Roll gap is roll gap a reference value, and subsequent pinch roller gap values between rollers are made the difference with roll gap a reference value, when roll gap variable quantity is more than 0.3mm,
Judge that twill defect occurs in strip.
Further, it is determined that the position of twill defect include: twill position be occur the point of twill to strip steel head away from
From this distance is calculated since when strip bites pinch roller, detects strip speed by the speed detector being arranged on pinch roller
Degree, occurs position L=v1x0.05+v2x0.05+ ...+vnx0.05 of twill point, and speed detector just detects band every 0.05s
The speed of steel, the speed that first 0.05s is detected are v1, and the speed that second 0.05s is detected is v2, and n-th
The speed that 0.05s is detected is vn.
Further, pinch roller lifts first further include: when strip steel head enters pinch roller, is mounted on control pinch roller
Pressure sensor in the hydraulic cylinder of lifting measures the actual pressure of pinch roller, and actual pressure signal is sent to by pressure sensor
PLC monitors the variation of Withdrawal roll pressure in real time, when pressure variety is more than 5KN, judges that twill defect occurs in strip.
Further, the variation of monitoring Withdrawal roll pressure includes: the pressure after entering 8 meters of pinch roller length with strip steel head when
Power is pressure reference value, and subsequent Withdrawal roll pressure and pressure reference value are made the difference, when pressure variety is more than 5KN, judge band
There is twill defect in steel.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
Due to use strip from finishing mill through runout table, enter flipper guide, when strip steel head reach flipper guide when,
PLC sends pre-pair signal to flipper guide, and flipper guide carries out pre-pair, the folder that the strip after pre-pair passes through coiling machine to strip
It send roller, Wrapping Roll to enter mandrel to be batched, batches rear mandrel and start to expand, PLC is sent to pinch roller, Wrapping Roll and flipper guide
Action signal, first pinch roller are lifted, and Wrapping Roll is opened later, and then flipper guide executes pressure control to strip, so, effectively
Strip in the prior art is solved in coiling process by the extrusion deformation of flipper guide and rolling by pinch roller and Wrapping Roll
After cause twill defect occur, by successively working for pinch roller, Wrapping Roll and flipper guide, and then realize and can effectively reduce
The proportion and defect length of twill defect.
Detailed description of the invention
Fig. 1 is the flow diagram of hot rolling tin plate twill defects controlling method provided in an embodiment of the present invention；
Fig. 2 is the process flow chart that the strip of hot rolling tin plate twill defects controlling method in Fig. 1 is advanced.
Specific embodiment
Referring to Fig. 1-2, a kind of hot rolling tin plate twill defects controlling method provided in an embodiment of the present invention, including it is following
Step:
Step 1, strip 1 enters flipper guide 4 from finishing mill 2 through runout table 3.
Step 2, when 1 head of strip reach flipper guide 4 when, PLC(programmable logic controller (PLC)) sent to flipper guide 4 it is pre- right
Middle signal, flipper guide 4 carry out pre-pair to strip 1.
Step 3, the strip 1 after pre-pair enters mandrel 7 by pinch roller 5, the Wrapping Roll 6 of coiling machine and is batched.
Step 4, rear mandrel 7 is batched to start to expand, PLC to 4 sending action signal of pinch roller 5, Wrapping Roll 6 and flipper guide,
Pinch roller 5 lifts first, and Wrapping Roll 6 is opened later, and then flipper guide 4 executes pressure control to strip 1.
Technical solution of the present invention enters flipper guide, when band steel toe due to using strip from finishing mill through runout table
When portion reaches flipper guide, PLC sends pre-pair signal to flipper guide, and flipper guide carries out pre-pair to strip, the band after pre-pair
Steel enters mandrel by pinch roller, the Wrapping Roll of coiling machine and is batched, and batches rear mandrel and starts to expand, PLC to pinch roller, help
Winding up roller and flipper guide sending action signal, first pinch roller lift, and Wrapping Roll is opened later, and then flipper guide executes pressure to strip
Power control, so, efficiently solve in the prior art strip in coiling process by the extrusion deformation of flipper guide and through pinch
Cause twill defect to occur after the rolling of roller and Wrapping Roll, passes through successively working for pinch roller, Wrapping Roll and flipper guide, Jin Ershi
The proportion and defect length that can effectively reduce twill defect are showed.
Step 2 is discussed in detail.
When strip steel head reaches flipper guide, it includes: to be arranged at flipper guide 4 that PLC, which sends pre-pair signal to flipper guide,
There is thermal sensor, when 1 head of strip reaches flipper guide 4, thermal sensor sends heat inspection signal to PLC, signal is examined according to heat,
PLC sends pre-pair signal to flipper guide 4.When thermal sensor detects that temperature is more than 400 DEG C, then show that 1 head of strip reaches
Flipper guide 4.
Step 4 is discussed in detail.
Batching rear mandrel to start expansion includes: after crimping 5 circle on mandrel 7 when strip 1, and mandrel 7 starts to expand.Strip 1
The circle number that batches on mandrel 7 is obtained by the winding of strip 17 length computation of mandrel, is started when 1 head of strip enters pinch roller 5
Calculate, strip length L=strip conveying speed V × strip steel head pass through pinch roller time T, batch circle number=strip length/
Mandrel perimeter.Curling strip 1 circle number set according to strip type, such as A strip (1.8≤h≤2.0) batch circle number be
5 circles, it is 7 circles that B strip (2.0 h≤2.6 <), which batches circle number,.
Pinch roller lifts first, and Wrapping Roll is opened later, and then flipper guide executes after pressure control includes: 0.1s strip
Pinch roller 5 lifts, and Wrapping Roll 6 is opened after 0.3s, and guide plate 4 executes pressure control to strip 1 on rear side of 0.5s, by pinch roller, helps
Winding up roller and flipper guide successively work, and then realize the proportion and defect length that can effectively reduce twill defect.
Pinch roller lifts first further include: when 1 head of strip enters pinch roller 5, is mounted on what control pinch roller 5 was gone up and down
Displacement sensor in hydraulic cylinder measures the practical roll gap of pinch roller 5, and practical roll gap signal is sent to PLC by displacement sensor,
The variation that real time monitoring pinches roller gap judges that twill defect occurs in strip when roll gap variable quantity is more than 0.3mm；Work as hair
When raw twill defect, the position of twill defect is determined, show twill defective locations information, can effectively real-time judgment go out
There is twill defect in the strip batched, and can provide specific defect information, is conducive to handle defect in time, when roll gap is mutated
After alarming value, PLC sends alarm signal to HMI, alarms on HMI picture, and operative employee is notified to enter finishing work
Industry area is cut off, and defective coil is avoided to be sent to cold rolling process.
The variation of real time monitoring pinch roller gap includes: that the roll gap after entering 8 meters of 5 length of pinch roller with 1 head of strip is
Subsequent pinch roller gap values between rollers are made the difference with roll gap a reference value, when roll gap variable quantity is more than 0.3mm, judge band by roll gap a reference value
There is twill defect in steel, monitors in real time to twill defect, is conducive to processing of the subsequent processing to twill defect.
It is distance of the point of generation twill to strip steel head, this distance that the position for determining twill defect, which includes: twill position,
It is calculated since when strip 1 bites pinch roller 5, strip speed is detected by the speed detector being arranged on pinch roller 5, is occurred
Position L=v1x0.05+v2x0.05+ ...+vnx0.05 of twill point, speed detector just detect the speed of strip every 0.05s
Degree, and, the speed of strip is sent to PLC every 0.05s by speed detector, and the speed that first 0.05s is detected is v1,
The speed that second 0.05s is detected is v2, and the speed that n-th of 0.05s is detected is vn.
When twill defect occurs, the time of twill defect occurs for PLC record, when twill occurs for second 0.05s,
PLC carries out operation, and the position that twill point occurs is L=v1x0.05+v2x0.05.
Pinch roller lifts first further include: when 1 head of strip enters pinch roller 5, is mounted on what control pinch roller 5 was gone up and down
Pressure sensor in hydraulic cylinder measures the actual pressure of pinch roller 5, and actual pressure signal is sent to PLC by pressure sensor,
The variation of real time monitoring Withdrawal roll pressure judges that twill defect, Neng Gouyou occurs in strip when pressure variety is more than 5KN
There is twill defect in the strip that effect ground real-time judgment is batching out, and can provide specific defect information, is conducive in time
Defect is handled, after pressure jump is more than alarming value, PLC sends alarm signal to HMI, alarms on HMI picture, notifies
Operative employee enters finishing operation area and cuts off, and defective coil is avoided to be sent to cold rolling process.
When monitoring Withdrawal roll pressure variation include: pressure after entering 8 meters of pinch roller length using 1 head of strip as pressure
A reference value makes the difference subsequent Withdrawal roll pressure and pressure reference value, when pressure variety is more than 5KN, judges that strip occurs
Twill defect monitors twill defect in real time, is conducive to processing of the subsequent processing to twill defect.
The embodiment of the present invention is introduced in order to become apparent from, is introduced from the application method of the embodiment of the present invention below.
Strip 1, through runout table 3, enters flipper guide 4 from finishing mill 2.
It is provided with thermal sensor at flipper guide 4, when 1 head of strip reaches flipper guide 4, thermal sensor is sent to PLC
Heat inspection signal examines signal according to heat, and PLC sends pre-pair signal to flipper guide 4, and thermal sensor detects that temperature is more than 400 DEG C
When, then show that 1 head of strip reaches flipper guide 4, when 1 head of strip reaches flipper guide 4, PLC(programmable logic controller (PLC))
Pre-pair signal is sent to flipper guide 4, flipper guide 4 carries out pre-pair to strip 1.
Strip 1 after pre-pair enters mandrel 7 by pinch roller 5, the Wrapping Roll 6 of coiling machine and is batched.
It batches rear mandrel 7 to start to expand, after strip 1 crimps 5 circle on mandrel 7, mandrel 7 starts to expand.Strip 1 is in core
The circle number that batches on axis 7 is obtained by the winding of strip 17 length computation of mandrel, starts to calculate when 1 head of strip enters pinch roller 5,
Strip length L=strip conveying speed V × strip steel head passes through the time T of pinch roller, batches circle number=strip length/mandrel week
It is long.The circle number of curling strip 1 is set according to strip type, such as it is 5 circles, B that A strip (1.8≤h≤2.0), which batches circle number,
It is 7 circles that strip (2.0 h≤2.6 <), which batches circle number,.
PLC is to 4 sending action signal of pinch roller 5, Wrapping Roll 6 and flipper guide, and pinch roller 5 lifts after 0.1s, helps after 0.3s
Winding up roller 6 is opened, and guide plate 4 executes pressure control to strip 1 on rear side of 0.5s, passes through the successively work of pinch roller, Wrapping Roll and flipper guide
Make, and then realize the proportion and defect length that can effectively reduce twill defect, flipper guide carries out pressure control to strip 1
System be set according to strip type, such as A strip (1.8≤h≤2.0) pressure control be 6KN, B strip (2.0 < h≤
2.6) pressure control is 8KN.
When 1 head of strip enters pinch roller 5, it is mounted on the displacement sensor controlled in the hydraulic cylinder that pinch roller 5 is gone up and down
The practical roll gap of pinch roller 5 is measured, practical roll gap signal is sent to PLC by displacement sensor, and real time monitoring pinches roller gap
Variation, when roll gap variable quantity is more than 0.3mm, judges that twill defect occurs in strip.It is long to enter pinch roller 5 with 1 head of strip
Roll gap after 8 meters of degree is roll gap a reference value, subsequent pinch roller gap values between rollers is made the difference with roll gap a reference value, when roll gap variable quantity is more than
When 0.3mm, judge that twill defect occurs in strip, twill defect is monitored in real time, is conducive to subsequent processing and twill is lacked
Sunken processing.
When twill defect occurs, the position of twill defect is determined, twill position is that the point of twill occurs to strip steel head
Distance, this distance calculates since when strip 1 bites pinch roller 5, passes through the speed detector being arranged on pinch roller 5 and detects
Strip speed, occur twill point position L=v1x0.05+v2x0.05+ ...+v3x0.05, speed detector every 0.05s just
The speed of strip is detected, the speed that first 0.05s is detected is v1.Show twill defective locations information, it can be effectively
There is twill defect in the strip that real-time judgment is batching out, and can provide specific defect information, is conducive to handle in time
Defect, after roll gap mutation is more than alarming value, PLC sends alarm signal to HMI, alarms on HMI picture, notice operation
Work enters finishing operation area and is cut off, and defective coil is avoided to be sent to cold rolling process.
When 1 head of strip enters pinch roller 5, it is mounted on the pressure sensor controlled in the hydraulic cylinder that pinch roller 5 is gone up and down
The actual pressure of pinch roller 5 is measured, actual pressure signal is sent to PLC by pressure sensor, monitors Withdrawal roll pressure in real time
Variation, when pressure variety is more than 5KN, judges that twill defect occurs in strip, enters pinch roller length 8 with 1 head of strip
Pressure after rice is pressure reference value, subsequent Withdrawal roll pressure and pressure reference value is made the difference, when pressure variety is more than 5KN
When, judge that twill defect occurs in strip, twill defect is monitored in real time, is conducive to subsequent processing to the place of twill defect
Reason.Can strip that effectively real-time judgment is batching out there is twill defect, and specific defect information can be provided, had
Conducive to timely processing defect, after pressure jump is more than alarming value, PLC sends alarm signal to HMI, carries out on HMI picture
Alarm, notifies operative employee to enter finishing operation area and cut off, defective coil is avoided to be sent to cold rolling process.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (8)
1. a kind of hot rolling tin plate twill defects controlling method, which comprises the following steps:
Strip (1) through runout table (3), enters flipper guide (4) from finishing mill (2)；
When strip (1) head reaches flipper guide (4), PLC sends pre-pair signal to flipper guide (4), and flipper guide (4) is to strip
(1) pre-pair is carried out；
Strip (1) after pre-pair enters mandrel (7) by pinch roller (5), the Wrapping Roll (6) of coiling machine and is batched；
It batches rear mandrel (7) to start to expand, PLC is first to pinch roller (5), Wrapping Roll (6) and flipper guide (4) sending action signal
First pinch roller (5) is lifted, and Wrapping Roll (6) is opened later, and then flipper guide (4) executes pressure control to strip (1)；
Pinch roller lifts first further include: when strip (1) head enters pinch roller (5), is mounted on control pinch roller (5) lifting
Hydraulic cylinder in displacement sensor measure the practical roll gap of pinch roller (5), practical roll gap signal is sent to by displacement sensor
PLC, the variation that real time monitoring pinches roller gap judge that twill defect occurs in strip when roll gap variable quantity is more than 0.3mm；
When sending twill defect, the position of twill defect is determined；
Pinch roller lifts first further include:
When strip (1) head enters pinch roller (5), it is mounted on the pressure sensing controlled in the hydraulic cylinder that pinch roller (5) are gone up and down
Device measures the actual pressure of pinch roller (5), and actual pressure signal is sent to PLC by pressure sensor, and real time monitoring pinches roll-in
The variation of power judges that twill defect occurs in strip when pressure variety is more than 5KN.
2. control method according to claim 1, which is characterized in that it is described when strip steel head reach flipper guide when, PLC to
Flipper guide sends pre-pair signal
It is provided with thermal sensor at flipper guide (4), when the head of strip (1) reaches flipper guide (4), thermal sensor is to PLC
Heat inspection signal is sent, signal is examined according to heat, PLC sends pre-pair signal to flipper guide (4).
3. control method according to claim 1, which is characterized in that it is described batch rear mandrel start expansion include:
After strip (1) crimps 5 circle on mandrel (7), mandrel (7) starts to expand.
4. control method according to claim 3, it is characterised in that:
Batch circle number of the strip (1) on mandrel (7) is obtained by strip (1) winding mandrel (7) length computation, when strip (1) head
Portion starts to calculate when entering pinch roller (5), and strip length L=strip conveying speed V × strip steel head passes through the time of pinch roller
T batches circle number=strip length/mandrel perimeter.
5. control method according to claim 1, which is characterized in that the pinch roller first lifts, and Wrapping Roll is beaten later
It opens, then flipper guide executes pressure and control to strip includes:
Pinch roller (5) lifts after 0.1s, and Wrapping Roll (6) is opened after 0.3s, and guide plate (4) executes pressure to strip (1) on rear side of 0.5s
Control.
6. control method according to claim 5, which is characterized in that the real time monitoring pinches the variation packet of roller gap
It includes:
Roll gap after entering 8 meters of length of pinch roller (5) using strip (1) head is roll gap a reference value, by subsequent pinch roller gap values between rollers
It is made the difference with roll gap a reference value, when roll gap variable quantity is more than 0.3mm, judges that twill defect occurs in strip.
7. control method according to claim 5, which is characterized in that the position of the determining twill defect includes:
Twill position is that the point of twill occurs to the distance of strip steel head, this distance is since when strip (1) bites pinch roller (5)
It calculates, strip speed is detected by the speed detector being arranged on pinch roller (5), position L=v1x0.05 of twill point occurs
+ v2x0.05+ ...+vnx0.05, speed detector just detect the speed of strip, the speed that first 0.05s is detected every 0.05s
Degree is v1, and the speed that second 0.05s is detected is v2, and the speed that n-th of 0.05s is detected is vn.
8. control method according to claim 1, which is characterized in that the variation packet of the real time monitoring Withdrawal roll pressure
It includes:
Pressure after entering 8 meters of pinch roller length using strip (1) head is pressure reference value, by subsequent Withdrawal roll pressure and pressure
A reference value makes the difference, and when pressure variety is more than 5KN, judges that twill defect occurs in strip.
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| CN201710552527.9A CN107377633B (en) | 2017-07-07 | 2017-07-07 | A kind of hot rolling tin plate twill defects controlling and monitoring method |
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| CN201710552527.9A CN107377633B (en) | 2017-07-07 | 2017-07-07 | A kind of hot rolling tin plate twill defects controlling and monitoring method |
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| CN111790760B (en) * | 2020-07-20 | 2022-03-18 | 武汉钢铁有限公司 | Method for controlling bright strip and additional wave shape generated on surface of hot-rolled low-carbon mild steel and roller system device |
| CN112845619B (en) * | 2020-11-19 | 2023-02-17 | 邯郸钢铁集团有限责任公司 | Method for reducing residual stress at tail of hot-rolled high-strength strip steel |
| CN113020268B (en) * | 2021-03-08 | 2023-01-17 | 莱芜钢铁集团银山型钢有限公司 | Coiler, side guide control method and method for dynamically controlling clamping time |
| CN114260319A (en) * | 2021-12-03 | 2022-04-01 | 本钢板材股份有限公司 | Production method for improving head wrinkle defect of cold-rolled low-carbon steel coil |
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| JP2007125580A (en) * | 2005-11-04 | 2007-05-24 | Jfe Steel Kk | Apparatus for suppressing zigzag motion of steel strip |
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| JP2016097422A (en) * | 2014-11-19 | 2016-05-30 | 新日鐵住金株式会社 | Steel strip winding up device |
| CN106180210A (en) * | 2016-09-27 | 2016-12-07 | 中冶赛迪工程技术股份有限公司 | The control method of cold-strip steel head strip shape quality and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54157752A (en) * | 1978-06-01 | 1979-12-12 | Sumitomo Metal Ind Ltd | Coiling of hot rolled steel strip |
| JP2007125580A (en) * | 2005-11-04 | 2007-05-24 | Jfe Steel Kk | Apparatus for suppressing zigzag motion of steel strip |
| CN104226696A (en) * | 2014-09-09 | 2014-12-24 | 河北钢铁股份有限公司邯郸分公司 | Method for preventing flat cross grain of cold-rolled strip steel in online way |
| JP2016097422A (en) * | 2014-11-19 | 2016-05-30 | 新日鐵住金株式会社 | Steel strip winding up device |
| CN106311752A (en) * | 2015-06-19 | 2017-01-11 | 宝山钢铁股份有限公司 | Control method and system for improving curled edge loss caused by wave shape of finish-rolled strip steel |
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| CN107377633A (en) | 2017-11-24 |
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