CN102989839B - Hot continuous rolling coiler parallel side guide plate control method - Google Patents
Hot continuous rolling coiler parallel side guide plate control method Download PDFInfo
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- CN102989839B CN102989839B CN201110274640.8A CN201110274640A CN102989839B CN 102989839 B CN102989839 B CN 102989839B CN 201110274640 A CN201110274640 A CN 201110274640A CN 102989839 B CN102989839 B CN 102989839B
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- guide plate
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- sides guide
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Abstract
The present invention discloses a hot continuous rolling coiler parallel side guide plate control method, wherein control design of the parallel side guide plate is divided into four stages with the control method, and different speeds are adopted at different stages to control gradual closure of the side guide plate, such that an opening degree of the side guide plate is reduced so as to achieve purposes of effective inner ring tower shape defect reduction and effective strip steel edge portion damage defect reduction.
Description
Technical field
The present invention relates to Flatness of Hot Rolled Strip Fault Controlling Technology, more particularly, relate to a kind of hot continuous rolling coiling machine parallel sides guide plate control method.
Background technology
The operation such as the technological process of hot tandem is roughly divided into heating, roughing, finish rolling, batch.Wherein, consult shown in Fig. 1, the side of coiling machine is led device and is located on roller-way 1, and for transmission side and fore side bilateral symmetry are arranged, this side is led device and is made up of the parts such as oblique flipper guide 2, parallel sides guide plate 3, support lazy-tongs 4, hydraulic cylinder 5 and vavle shelf 6.The Main Function that device is led in side is carry out centering to it before band steel 7 head nips pinch roll 8 on the one hand, prevents turriform defect; Be after strip steel head nips pinch roll on the other hand, certain clamping force is implemented to band steel, to ensure that steel coil end-face is neat, prevent limit damage, overflow edge and staggered floor defect.
And flipper guide control method common is at present as follows:
Refer to shown in Fig. 2, in order to prevent strip steel head from being clamped by flipper guide, steel-fastening accident occurs, before strip steel head arrives parallel sides guide plate, parallel sides guide plate can preset an aperture according to the width of band steel, this sets aperture S=B+2L+B0, in formula: B is strip width; L is one-sided flipper guide short stroke aperture; B0 is added value.And in order to prevent turriform defect, when strip steel head arrives the outlet a point of parallel sides guide plate, short stroke starts to close at a high speed, the aperture S '=B+B0 of parallel sides guide plate after closing.
But, in actual production process, still easily there are following two kinds of defects:
1, inner ring turriform defect.In theory, before strip steel head arrives flipper guide, flipper guide short stroke aperture is less, is more tending towards centering when band steel enters pinch roll, and the probability that inner ring turriform defect occurs is also less.But aperture 2L is too small for parallel sides guide plate short stroke, and strip steel head more easily steel-fastening accident occurs.The short stroke aperture 2L of general hot rolling coiler parallel sides guide plate is >=80mm, i.e. one-sided L >=40mm, although such aperture can avoid steel-fastening accident, the time of closing needs is longer, and inner ring turriform defect incidence is higher.
2, steel edge portion damage defect.Due to strip steel head plate shape usually in various degree there is the problem such as shape wave or ultra-wide, and now reel tension is not also set up, so in the process of closing at a high speed in short stroke, steel edge portion is easy to be damaged by parallel sides guide plate.And short stroke closing velocity is faster, steel edge portion damage defect probability of happening is higher.But contrary, short stroke closing velocity is too slow, easily occurs again inner ring turriform defect.
Summary of the invention
For the above-mentioned shortcoming existed in prior art, the object of this invention is to provide a kind of hot continuous rolling coiling machine parallel sides guide plate control method, be conducive to cancellation band steel inner ring turriform and edge damage defect.
For achieving the above object, the present invention adopts following technical scheme:
This hot continuous rolling coiling machine parallel sides guide plate control method comprises following concrete steps:
A. in the middle part of parallel sides guide plate, strip detector is set respectively, with detection zone steel run location with exit;
B. pressure sensor being set on pinch roll hydraulic cylinder, carrying out detection zone steel run location by detecting pinch roll hydraulic pressure;
C. according to the strip width that host computer provides, control parallel sides guide plate and arrive initial setting aperture;
D., when being located at the strip detector in the middle part of parallel sides guide plate and strip steel head being detected, control parallel sides guide plate and close up to reduce short stroke aperture to the first control aperture;
E., when the strip detector being located at parallel sides horn exit detects strip steel head, control parallel sides guide plate and close up further to reduce short stroke aperture to the second control aperture;
F., after parallel sides guide plate arrives the second control aperture, control parallel sides guide plate and continue to close up to reduce short stroke aperture to the 3rd control aperture.
In step C, described initial setting aperture is S
just=B+2L+B0, and L>=40mm,
In formula, S
justfor initial setting aperture, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value.
In step D, the first described control aperture S
1=B+2L+B0-2L
1, and L
1=5 ~ 10mm, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the short stroke aperture that the first control reduces.
In step D, the speed of closing up of described parallel sides guide plate is 10-100mm/s.
In step e, described second controls aperture S
2=B+2L+B0-2L
1-2L
2, and L
2=30-20mm, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the one-sided short stroke aperture that the first control reduces, L
2for the one-sided short stroke aperture that the second control reduces.
In step e, the speed of closing up further of described parallel sides guide plate is 100-200mm/s.
In step F, the described the 3rd controls aperture S
3=B+2L+B0-2L
1-2L
2-2L
3, and L
3=5-10mm, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the one-sided short stroke aperture that the first control reduces, L
2for the one-sided short stroke aperture that the second control reduces, L
3for the 3rd controls the one-sided short stroke aperture that reduces.
In step F, it is 10-100mm/s that the continuing of described parallel sides guide plate closes up speed.
After step c, if strip detector does not detect band steel for some reason, and pressure sensor detects that pinch roll hydraulic pressure rises to when being more than or equal to pressure set points, directly carries out step F.
Described pressure set points is 15-25KN.
In technique scheme, hot continuous rolling coiling machine parallel sides guide plate control method of the present invention is by being four-stage by the control design case of parallel sides guide plate, and adopt different speed to close up gradually reduce its opening degree to control flipper guide, to reach the object effectively reducing inner ring turriform defect and steel edge portion damage defect in different phase.
Accompanying drawing explanation
Fig. 1 is the structure top view of hot continuous rolling coiling machine;
Fig. 2 is the control broken line graph of the one-sided short stroke aperture of parallel sides guide plate of prior art;
Fig. 3 is control method flow chart of the present invention;
Fig. 4 is the control broken line graph of the one-sided short stroke aperture of parallel sides guide plate of the present invention.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 1, Fig. 3, Fig. 4, hot continuous rolling coiling machine parallel sides guide plate control method of the present invention mainly comprises:
This hot continuous rolling coiling machine parallel sides guide plate control method comprises following concrete steps:
First, in the middle part of parallel sides guide plate 3, with exit, strip detector 9a, 9b are set respectively, with detection zone steel 7 run location.This strip detector 9a, 9b can adopt hot metal detector or laser detector.
Then pressure sensor 10 is set on pinch roll hydraulic cylinder, by detecting pinch roll 8 hydraulic pressure also for detection zone steel 7 run location.
When batching beginning, according to the strip width that host computer provides, begin through flipper guide control system control parallel sides guide plate 3 and arrive initial setting aperture, and be retained to (the a1 point in Fig. 4) till the strip detector 9a be located in the middle part of parallel sides guide plate 3 detects band steel 7 head always.This initial setting aperture S
just=B+2L+B0, in formula, S
justfor initial setting aperture, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value.Because band steel 7 head may exist the problem such as camber and ultra-wide, the short stroke aperture 2L of parallel sides guide plate 3 must be set in >=80mm, and namely L >=40mm guarantee band steel 7 enters parallel sides guide plate 3 smoothly, avoids steel-fastening accident.
And when being located at (the a1 point in Fig. 4) when the strip detector 9a in the middle part of parallel sides guide plate 3 detects band steel 7 head, control parallel sides guide plate 3 by flipper guide control system to close up to reduce short stroke aperture to the first control aperture, and be retained to (a point in Fig. 4) till the strip detector 9b being located at parallel sides guide plate 3 outlet detects band steel 7 head always; This first control aperture S
1=B+2L+B0-2L
1, i.e. S
1=S
just-2L
1, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the short stroke aperture that the first control reduces.Owing to arriving after in the middle part of parallel sides guide plate 3 when band steel 7 head, because camber causes the possibility of steel-fastening to reduce, at this moment the short stroke aperture of parallel sides guide plate 3 can be reduced 2L1, and L1 is set as 5 ~ 10mm, to control inner ring turriform.Because a1 in the middle part of parallel sides guide plate 3 is longer to the distance of the outlet a of parallel sides guide plate 3, when contacting with band steel 7 for preventing flipper guide, lesion ribbon steel 7 edge, so be chosen as at a slow speed by the speed that this short stroke is closed up, namely controls within the scope of 10 ~ 80mm/s.
When being located at (a point in Fig. 4) when strip detector 9b that parallel sides guide plate 3 exports detects band steel 7 head, then control parallel sides guide plate 3 and close up to reduce short stroke aperture to the second further and control aperture; This second control aperture S
2=B+2L+B0-2L
1-2L
2, i.e. S
2=S
1-2L
2, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the one-sided short stroke aperture that the first control reduces, L
2for the one-sided short stroke aperture that the second control reduces.Because band steel 7 head all have passed parallel sides guide plate 3, parallel sides guide plate 3 can reduce 2L2 further, and L2 is set to 30 ~ 20mm, to control inner ring turriform better.Due to the distance being exported to pinch roll 8 of parallel sides guide plate 3 very short (a point in Fig. 4 is to b point), band steel 7 head centering difficulty after pinch roll 8 of nipping increases, so the speed that the short stroke in this process is closed up further can only be selected fast, namely to control within the scope of 100 ~ 200mm/s.
Finally, after control parallel sides guide plate 3 arrives the second control aperture (the b point in Fig. 4), control parallel sides guide plate 3 immediately and continue to close up to reduce short stroke aperture to the 3rd control aperture.C point in Fig. 4 is that short stroke is closed completely.3rd controls aperture S
3=B+2L+B0-2L
1-2L
2-2L
3, i.e. S
3=S
2-2L
3, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the one-sided short stroke aperture that the first control reduces, L
2for the one-sided short stroke aperture that the second control reduces, L
3for the 3rd controls the one-sided short stroke aperture that reduces.In this stage, for ensureing that steel coil end-face is neat, parallel sides guide plate 3 must continue to reduce 2L3, and L3 is set to 5 ~ 10mm, to approach band steel 7 edge gradually.Because band steel 7 head may exist the defect such as ultra-wide and plate shape, and be in the tension force unstable stage, damaging its edge when approaching band steel 7 for preventing flipper guide, so the speed that the short stroke in this stage continues to close up can only be selected at a slow speed, namely controlling within the scope of 10 ~ 80mm/s.
In addition, because fog or failure and other reasons cause strip detector 9a, 9b band steel 7 not detected, then by pressure sensor, Real-Time Monitoring is carried out to pinch roll 8 cylinder pressure, being more than or equal to pressure set points once detect that pinch roll 8 hydraulic pressure rises to, directly entering the automatic operation of the 3rd last control aperture.Through repetition test and calculating, this pressure set points is set to 15 ~ 25KN.
Compared with prior art, control method of the present invention can damage the needs of powder injection molding according to inner ring turriform and limit, adopt the aperture of different speeds control parallel sides guide plates 3, therefore possessed following advantage in different phase:
1, inner ring turriform defect can effectively be reduced: when band steel 7 head arrives after in the middle part of parallel sides guide plate 3, because camber causes the possibility of steel-fastening to reduce, at this moment the short stroke aperture of parallel sides guide plate 3 is reduced, namely steel-fastening accident is avoided, in turn save the time of closing short stroke and needing, effectively can reduce inner ring turriform defect.
2, effectively can reduce band steel 7 edge damage defect: control flipper guide all adopts at beginning dwell period and final stage and approaches at a slow speed band steel 7 edge, effectively can reduce band steel 7 edge damage defect.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (9)
1. a hot continuous rolling coiling machine parallel sides guide plate control method, is characterized in that:
Comprise following concrete steps:
A. in the middle part of parallel sides guide plate, strip detector is set respectively, with detection zone steel run location with exit;
B. pressure sensor being set on pinch roll hydraulic cylinder, carrying out detection zone steel run location by detecting pinch roll hydraulic pressure;
C. according to the strip width that host computer provides, control parallel sides guide plate and arrive initial setting aperture;
D., when being located at the strip detector in the middle part of parallel sides guide plate and strip steel head being detected, control parallel sides guide plate and close up to reduce short stroke aperture to the first control aperture;
E., when the strip detector being located at parallel sides horn exit detects strip steel head, control parallel sides guide plate and close up further to reduce short stroke aperture to the second control aperture, described second controls aperture S
2=B+2L+B0-2L
1-2L
2, and L
2=30-20mm, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the one-sided short stroke aperture that the first control reduces, L
2for the one-sided short stroke aperture that the second control reduces;
F., after parallel sides guide plate arrives the second control aperture, control parallel sides guide plate and continue to close up to reduce short stroke aperture to the 3rd control aperture.
2. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 1, is characterized in that:
In step C, described initial setting aperture is S
just=B+2L+B0, and L>=40mm,
In formula, S
justfor initial setting aperture, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value.
3. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 1, is characterized in that:
In step D, the first described control aperture S
1=B+2L+B0-2L
1, and L
1=5 ~ 10mm, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the short stroke aperture that the first control reduces.
4. the hot continuous rolling coiling machine parallel sides guide plate control method as described in claim 1 or 3, is characterized in that:
In step D, the speed of closing up of described parallel sides guide plate is 10-100mm/s.
5. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 1, is characterized in that:
In step e, the speed of closing up further of described parallel sides guide plate is 100-200mm/s.
6. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 1, is characterized in that:
In step F, the described the 3rd controls aperture S
3=B+2L+B0-2L
1-2L
2-2L
3, and L
3=5-10mm, in formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1for the one-sided short stroke aperture that the first control reduces, L
2for the one-sided short stroke aperture that the second control reduces, L
3for the 3rd controls the one-sided short stroke aperture that reduces.
7. the hot continuous rolling coiling machine parallel sides guide plate control method as described in claim 1 or 6, is characterized in that:
In step F, it is 10-100mm/s that the continuing of described parallel sides guide plate closes up speed.
8. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 1, is characterized in that:
After step c, if strip detector does not detect band steel for some reason, and pressure sensor detects that pinch roll hydraulic pressure rises to when being more than or equal to pressure set points, directly carries out step F.
9. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 8, is characterized in that:
Described pressure set points is 15-25KN.
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|---|---|---|---|
| CN201110274640.8A CN102989839B (en) | 2011-09-16 | 2011-09-16 | Hot continuous rolling coiler parallel side guide plate control method |
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|---|---|---|---|
| CN201110274640.8A CN102989839B (en) | 2011-09-16 | 2011-09-16 | Hot continuous rolling coiler parallel side guide plate control method |
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| CN102989839B true CN102989839B (en) | 2014-12-24 |
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| CN113351658A (en) * | 2021-06-28 | 2021-09-07 | 南京钢铁股份有限公司 | Centering method for side guide plate of heavy and medium plate mill |
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