CN103056168A - Method for controlling deviation of intermediate billet of coil box - Google Patents
Method for controlling deviation of intermediate billet of coil box Download PDFInfo
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- CN103056168A CN103056168A CN2013100094926A CN201310009492A CN103056168A CN 103056168 A CN103056168 A CN 103056168A CN 2013100094926 A CN2013100094926 A CN 2013100094926A CN 201310009492 A CN201310009492 A CN 201310009492A CN 103056168 A CN103056168 A CN 103056168A
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Abstract
The invention discloses a method for controlling deviation of an intermediate billet of a coil box, and belongs to the technical field of hot-rolled steel. The method includes sequentially feeding the intermediate billet into a bending roll unit via an inlet-side guide plate and an inlet roll unit; bending the intermediate billet to form a strip billet; coiling the strip billet by a forming roll and a first coil carrying roll of a coiling station sequentially to form a strip coil; uncoiling the strip coil by an uncoiling station, and then shifting the strip coil; and flattening the strip coil by a pinch straightening roll, and then feeding the strip coil into a finishing mill group via a front-side guide plate of a flying shear to be rolled. The method has the advantages that problems of coiling failure of an intermediate coil due to deviation of an intermediate billet and uncoiling failure due to a poor coil pattern are effectively solved; and investment is omitted, the method is simple, and is high in applicability and obvious in control effect, a stable batch rolling effect of industrial production is guaranteed, and an effect for obviously improving stable production of the hot continuous rolling coil box is realized.
Description
Technical field
The invention belongs to the hot rolling technical field of steel rolling, particularly a kind of method of controlling Coil Box intermediate blank sideslip.
Background technology
For reducing between the thick finish rolling because apart from the long end to end temperature drop that causes, present general two kinds of methods that adopt are respectively the method that increases stay-warm case between R2 and the finish rolling, by the increase stay-warm case, intermediate blank are heated, and guarantee the intermediate blank temperature homogeneity; Another is not in the mood for batching Coil Box for arranging between roughing and finish rolling entrance, by intermediate blank is exchanged end to end, carry out intermediate blank curling simultaneously; Method by the intermediate blank self-temperature heats mutually improves temperature homogeneity.The Coil Box technology is compared the stay-warm case technological merit: intermediate blank is batched, and employing R2 limit is rolling, technology is batched on the Coil Box limit, can shorten R2 to the effective length between the finish rolling, conserve space; Secondly Coil Box does not use extra power that intermediate blank is incubated, but mutually heats by centre volume body temperature, guarantees its uniformity, thereby has saved the energy.Therefore adopt the Coil Box technology can shortening heat rolling line length, reduce distance between roughing and the finish rolling, improve rhythm of production, improve timely output; Improve the temperature homogeneity of intermediate blank, reduced tapping temperature, optimized the rolling strategy in finish rolling district, improved product quality, reduced energy loss.
At present, the nationwide uses the producer of Coil Box technology that the families more than ten such as Shoudu Iron and Steel Co, Taiyuan Iron and Steel Co., Tang Gang, Laigang are arranged respectively, and its plant equipment is mainly provided by western mark or two machine-building merchants of VAI; Control panel is then mainly selected Siemens or the design control of Temic company.Yet no matter the Coil Box of that family's design in use all exists slab loose winding to occur in curly course, roll up inclined to one side phenomenon, thus in the middle of causing volume can't moulding or uncoiling unsuccessfully wait phenomenon.Above phenomenon of the failure causes the finish rolling threading unstable, rolling unusual or the template precision is bad, even steel scrap steel-fastening accident occurs, is unfavorable for producing continuously, and improves production cost.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of controlling Coil Box intermediate blank sideslip, has solved the problem such as Coil Box telescope and uncoiling sideslip in the prior art.
For solving the problems of the technologies described above, the invention provides a kind of method of controlling Coil Box intermediate blank sideslip, comprise the steps:
Described intermediate blank is entered the bending roll unit by inlet side-guiding-board and entrance roller unit successively, described intermediate blank is carried out bending, form made-up belt, described made-up belt is the format roll through batching the station and the first cradle roll successively, make described made-up belt rolling, form the roll coil of strip, with the described roll coil of strip after the uncoiling of uncoiling station and transfer the roll coil of strip, the described roll coil of strip through pinch rectify the straight roller of roller smooth after, sending into mm finishing mill unit by flying shear front-side guide plate is rolled, wherein, the bending roll outlet roll gap in the described bending roll unit is suc as formula shown in (1) and (2):
Hbend=1.08h×f1+offset （1）
f1=0.0057c
2+0.038c+0.9 （2）
Wherein, Hbend is the bending roll outlet roll gap in the described bending roll unit, and c is the steel grade hardness of described intermediate blank, and h is the thickness of described intermediate blank, and offset is for intervening coefficient.
Further, the controlled pressure of described inlet side-guiding-board is 10～20KN, and the opening degree of described inlet side-guiding-board is 0.1～5mm.
Further, the coil diameter of described intermediate blank is suc as formula shown in (4) and (5):
Symbol D=1000+d (4)
d=a×b/10 （5）
Wherein D is the coil diameter of described intermediate blank, and a is the hardness of described intermediate blank, and b is the yield strength of described intermediate blank.
Further, the distance of the B roller of described the first cradle roll and described intermediate blank is 60mm.
Further, the B roller of described the first cradle roll and the translational speed between the described intermediate blank are
15mm/s。
Further, the first stabilizer opening degree is that the width of described intermediate blank adds 20mm.
Further, the 2B roller fixed position of second cradle roll at described uncoiling station is 150mm.
Further, the wearing clearance of the straight roller of described pinch roll as the formula (6);
h=0.115×（SDS-SOS） （6）
Wherein h is the wearing clearance of the straight roller of described pinch roll, and SDS is the transmission side position of the straight roller of described pinch roll, and SOS is the fore side position of the straight roller of described pinch roll, and unit is mm.
Further, all there is guide wheel at the centre of described flying shear front-side guide plate and outlet position.
The method of control Coil Box intermediate blank sideslip provided by the invention is batched failure in the middle of efficiently solving that the intermediate blank sideslip causes and the volume type is bad causes uncoiling unsuccessfully.The method need not to drop into investment, and simple, and applicability is strong, and the control effect is remarkable, has guaranteed the batch stable rolling effect of suitability for industrialized production, and hot continuous rolling Coil Box steady production is had the obvious castering action that improves.
Description of drawings
The graph of a relation of the hardness of a kind of intermediate blank that Fig. 1 provides for the embodiment of the invention and the outlet of the bending roll in bending roll unit roll gap;
A kind of width gage measured deviation design sketch that Fig. 2 provides for the embodiment of the invention.
The specific embodiment
Referring to Fig. 1, a kind of method of controlling Coil Box intermediate blank sideslip that the embodiment of the invention provides, the implementation time is on April 25th, 2012, intermediate blank is entered the bending roll unit by inlet side-guiding-board and entrance roller unit successively, intermediate blank is carried out bending, form made-up belt, made-up belt is the format roll through batching the station and the first cradle roll successively, make the made-up belt rolling, form the roll coil of strip, with the roll coil of strip after the uncoiling of uncoiling station and transfer the roll coil of strip, the roll coil of strip through pinch rectify the straight roller of roller smooth after, send into mm finishing mill unit by flying shear front-side guide plate and be rolled.
The three bending roller units that batch the station are bent into certain curvature with intermediate blank, form three rollers with format roll with the first cradle roll A roller that batches the station and batch.Wherein the bending roll roll gap determines initial roll gap size and initial volume type, bending roll initially exports roll gap according to following formula: Hbend=f * h+offset sets, it is only considered and workpiece thickness, and the offset value is similarly Siemens's empirical parameter value 1.08 for Siemens's empirical parameter value 22.42, f.The embodiment of the invention is optimized above-mentioned formula, increases actual steel grade hardness f1, increases at the HMI picture simultaneously and manually intervenes deviation offset value, i.e. the outlet of bending roll in new bending roll unit roll gap is suc as formula shown in (1) and (2);
Hbend=1.08h×f1+offset （1）
f1=0.0057c
2+0.038c+0.9 （2）
Wherein, Hbend is the bending roll roll gap in the bending roll unit, and c is the steel grade hardness of intermediate blank, and h is the thickness of intermediate blank, and offset is for intervening coefficient.
The relation of the bending roll outlet roll gap in the hardness of intermediate blank and the bending roll unit is seen Fig. 1.In embodiments of the present invention, the value of offset is manually intervened it according to steel grade hardness, thereby improves inner ring volume type.
Wherein the desired location side-play amount of inlet side-guiding-board Position Control is dynamically adjusted, increased simultaneously pressure control, its pressure is controlled between 10～20KN, improves according to steel grade hardness, and pressure increases; Its purpose is placed on the roller-way center line for guaranteeing amesiality intermediate blank through behind the inlet side-guiding-board; Simultaneously when slab end to end under the template unfavorable condition, add pressure control after, when pressure increases, increase the inlet side-guiding-board opening degree, maximum increase 5mm avoids occurring the slab head and is stuck in the flipper guide position and can't batches successfully.
The bending roll roll gap by initial roll gap along with coil diameter increases gradually, guarantee that the suitable curvature of intermediate blank is beneficial to batch smoothly, former design bending roll roll gap increases when constantly being 1000mm for the intermediate blank coil diameter, for improving outer ring volume type and elasticity between layers, according to the steel grade classification bending roll roll gap variation moment is revised in control procedure, the coil diameter of intermediate blank is suc as formula shown in (3) and (4):
Symbol D=1000+d (3)
d=a×b/10 （4）
Wherein symbol D is the coil diameter of intermediate blank, and d is the coil diameter parameter of intermediate blank, and a is the hardness rank of intermediate blank, and b is the yield strength of intermediate blank.
The B roller that batches station the first cradle roll in the middle volume coiling process keeps certain distance with coil of strip all the time, approximately about 50mm, batch when finishing when closing on, the B roller of 1# cradle roll and the roll gap of intermediate blank are closed until the B roller touches coil of strip, volume volume type is relatively oval in the middle of the low steel grade of part hardness rank such as the silicon steel, contact with the B roller easily, further affect the volume type, this is increased the distance of the B roller of the first cradle roll and described intermediate blank to 60mm, and when arriving, afterbody reduces in advance distance, that reduces the B roller close the first cradle roll and described intermediate blank is reduced to 15mm/s apart from speed by 20mm/s, improves and holds in the palm roll stabilizing.
Batch the station stabilizer and act as volume in the middle of the clamping, centering, batch and batch station stabilizer both-side opening degree after finishing and be fixed on a certain permanent opening degree, batch station the first cradle roll the centre volume is transferred to 2# cradle roll unit; Because volume lacks constraint in the middle of this moment, shakes easily in output procedure, causes sideslip.To this in the middle of being about to begin to transmit during volume, with batch station stabilizer opening degree by the correction of former design permanent opening degree as the width+20mm for intermediate blank, the volume activity alleviates running deviation value in the middle of the restriction.
Second cradle roll at uncoiling station is installed 3 roller-ways altogether, is respectively 2A roller, 2B roller, 2C roller, and wherein the 2A roller is adjusted into vertical rolling line knee-action, cooperates the middle volume of transmission, and the 2B roller is along the rolling line horizontal balance, adjusts distance between 2B and the 2C.Former design consideration coiled sheet case batches with different by pattern, and 2B roller control position difference is fixed as 0mm, batches mode position and be fixed as 200mm by mode position.When the position of 2B roller was 200mm, apart from being 930mm, often generation band steel head inserted between 2B, the 2C or clashes into backplate between 2B and the 2C between 2B and the 2C, causes sideslip even uncoiling failure; Behind the analysis and research mechanical mechanism, with the desired location stuck-at-１ 50mm of 2B roller, distance reduces because the excessive head that causes of distance scratches to 880mm between shortening 2B and the 2C.
Pinch smoothing roll by two hydraulic cylinder controls of operation and transmission both sides, single servo valve control is realized mechanical synchronization.Both sides hydraulic cylinder depressing position is different, causes pinch roll roll gap wedge shape, clamping intermediate blank sideslip.Wedge shape when returning numerical value deviation reflection steel rolling with both sides hydraulic cylinder MTS, be that the pinch roll both sides Position of Hydraulic Cylinder that MTS returns changes, indirectly reflect the wearing clearances such as each bearing pin, bearing pin sky, through on-the-spot actual measurement and mechanical location analysis, the wearing clearance of the straight roller of pinch roll as the formula (5);
h=0.115×（SDS-SOS）
Wherein h is the wearing clearance of the straight roller of pinch roll, and SDS is the transmission side position of the straight roller of pinch roll, and SOS is the fore side position of the straight roller of pinch roll, and unit is mm.
Enter the flying shear front-side guide plate zone through pinching smoothing roll after the intermediate blank uncoiling, flying shear front-side guide plate is proofreaied and correct intermediate blank again, and the guiding intermediate blank enters flying shear and carries out cutting head cutting tail; Because flying shear front-side guide plate is that Position Control and chucking power are less, easily the flying shear front-side guide plate opening degree is rushed open, can't play guiding function, this is transformed flying shear front-side guide plate, in the middle of the body of flying shear front-side guide plate, all set up guide wheel with the outlet position, dissolve the particularly impact of head of intermediate blank by the rotation of guide wheel.
The method that the embodiment of the invention provides is controlled optimization to batching station equipment respectively, by flying shear front-side guide plate equipment is transformed, substantially solved because the uncoiling sideslip that the volume type causes, specifically referring to Fig. 2, in Fig. 2, ordinate represents strip running deviation amount size, and abscissa is time shaft, namely shows the running deviation value of monoblock band steel along with passage of time.It 1. is expression head length 7.5m running deviation value in the accompanying drawing in the accompanying drawing 2, maximum drops to 0mm by 70mm, be afterwards the i.e. 2. running deviation value of band steel body part, after anti-deviation technology utilization, the body running deviation value is controlled in the 20mm, and 3. is slab tail length 2m left and right sides running deviation value, owing to lose constraint, running deviation value is 55mm relatively approximately, has realized that Coil Box is stable, the diversified steady production of sample.
Advantage of the present invention is: utilize existing equipment and technological process in the Coil Box coiling process, by optimizing Coil Box equipment control technology, efficiently solve intermediate blank in the Coil Box coiling process and uncoiling process in problem, the method does not increase investment and production cost, simply, applicability is strong, and the control effect is remarkable.
It should be noted last that, the above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to example the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. a method of controlling Coil Box intermediate blank sideslip is characterized in that, comprises the steps:
Intermediate blank is entered the bending roll unit by inlet side-guiding-board and entrance roller unit successively, described intermediate blank is carried out bending, form made-up belt, described made-up belt is the format roll through batching the station and the first cradle roll successively, make described made-up belt rolling, form the roll coil of strip, with the described roll coil of strip after the uncoiling of uncoiling station and transfer the roll coil of strip, the described roll coil of strip through pinch rectify the straight roller of roller smooth after, sending into mm finishing mill unit by flying shear front-side guide plate is rolled, wherein, the bending roll outlet roll gap in the described bending roll unit is suc as formula shown in (1) and (2):
Hbend=1.08h×f1+offset （1）
f1=0.0057c
2+0.038c+0.9 （2）
Wherein, Hbend is the bending roll outlet roll gap in the described bending roll unit, and c is the steel grade hardness of described intermediate blank, and h is the thickness of described intermediate blank, and offset is for intervening coefficient.
2. method according to claim 1 is characterized in that, the controlled pressure of described inlet side-guiding-board is 10～20KN, and the opening degree of described inlet side-guiding-board is 0.1～5mm.
3. method according to claim 1 is characterized in that, the coil diameter of described intermediate blank is suc as formula shown in (4) and (5):
Symbol D=1000+d (4)
d=a×b/10 （5）
Wherein D is the coil diameter of described intermediate blank, and a is the hardness of described intermediate blank, and b is the yield strength of described intermediate blank.
4. method according to claim 1 is characterized in that, the B roller of described the first cradle roll and the roll gap of described intermediate blank distance are 60mm.
5. method according to claim 1 is characterized in that, B roller and the translational speed between the described intermediate blank of described the first cradle roll are 15mm/s.
6. method according to claim 1 is characterized in that, when described batch finish after, the first stabilizer opening degree is that the width of described intermediate blank adds 20mm.
7. method according to claim 1 is characterized in that, the 2B roller fixed position of second cradle roll at described uncoiling station is 150mm.
8. method according to claim 1 is characterized in that, the wearing clearance of the straight roller of described pinch roll as the formula (6);
h=0.115×（SDS-SOS） （6）
Wherein h is the wearing clearance of the straight roller of described pinch roll, and SDS is the transmission side position of the straight roller of described pinch roll, and SOS is the fore side position of the straight roller of described pinch roll, and unit is mm.
9. method according to claim 1 is characterized in that, all there is guide wheel at the centre of described flying shear front-side guide plate and outlet position.
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|---|---|---|---|
| CN201310009492.6A CN103056168B (en) | 2013-01-10 | 2013-01-10 | A kind of method controlling deviation of intermediate billet of coil box |
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|---|---|---|---|
| CN201310009492.6A CN103056168B (en) | 2013-01-10 | 2013-01-10 | A kind of method controlling deviation of intermediate billet of coil box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543813A (en) * | 2018-03-27 | 2018-09-18 | 北京首钢股份有限公司 | A kind of process control method improving hot rolling Coil Box roll |
| CN106807761B (en) * | 2015-11-30 | 2019-06-25 | 宝山钢铁股份有限公司 | A kind of novel plate rolling side guide control method of hot-strip |
| CN110064660A (en) * | 2019-04-09 | 2019-07-30 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
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| JPH04187314A (en) * | 1990-11-20 | 1992-07-06 | Sumitomo Metal Ind Ltd | Hot rolling equipment |
| JPH07290129A (en) * | 1994-04-27 | 1995-11-07 | Nippon Steel Corp | Method for controlling coiling temperature for hot rolled steel sheet |
| CN2377023Y (en) * | 1999-02-14 | 2000-05-10 | 中国第二重型机械集团公司 | Heat coiling drum |
| CN1483526A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Mthod for controlling roller gap of precision rolling machine of band steel |
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2013
- 2013-01-10 CN CN201310009492.6A patent/CN103056168B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04187314A (en) * | 1990-11-20 | 1992-07-06 | Sumitomo Metal Ind Ltd | Hot rolling equipment |
| JPH07290129A (en) * | 1994-04-27 | 1995-11-07 | Nippon Steel Corp | Method for controlling coiling temperature for hot rolled steel sheet |
| CN2377023Y (en) * | 1999-02-14 | 2000-05-10 | 中国第二重型机械集团公司 | Heat coiling drum |
| CN1483526A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Mthod for controlling roller gap of precision rolling machine of band steel |
Non-Patent Citations (2)
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| 刘文斌等: "热卷箱在迁钢2250热轧生产线的应用", 《重型机械》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106807761B (en) * | 2015-11-30 | 2019-06-25 | 宝山钢铁股份有限公司 | A kind of novel plate rolling side guide control method of hot-strip |
| CN108543813A (en) * | 2018-03-27 | 2018-09-18 | 北京首钢股份有限公司 | A kind of process control method improving hot rolling Coil Box roll |
| CN110064660A (en) * | 2019-04-09 | 2019-07-30 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
| CN110064660B (en) * | 2019-04-09 | 2020-07-17 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
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| CN103056168B (en) | 2015-09-30 |
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