CN102989839A - 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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- CN102989839A CN102989839A CN2011102746408A CN201110274640A CN102989839A CN 102989839 A CN102989839 A CN 102989839A CN 2011102746408 A CN2011102746408 A CN 2011102746408A CN 201110274640 A CN201110274640 A CN 201110274640A CN 102989839 A CN102989839 A CN 102989839A
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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 the 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 continuous rolling unit roughly is divided into heating, roughing, finish rolling, batch.Wherein, consult shown in Figure 1ly, the side of coiling machine is led device and is located on the roller-way 1, is that transmission side and fore side bilateral symmetry are arranged, this side lead device by oblique flipper guide 2, parallel sides guide plate 3, support the parts such as lazy-tongs 4, hydraulic cylinder 5 and vavle shelf 6 and form.The Main Function that side is led device is to nip at band steel 7 heads that pinch roll 8 is front to carry out centering to it on the one hand, prevents the turriform defective; On the other hand after the band steel head is nipped pinch roll, neat to guarantee steel coil end-face to implementing certain clamping force with steel, prevent limit damage, excessive limit and staggered floor defective.
And at present common flipper guide control method is as follows:
See also shown in Figure 2, in order to prevent being with steel head to be clamped by flipper guide and the steel-fastening accident occurs, before the band steel head arrived the parallel sides guide plate, the parallel sides guide plate can preset according to the width with steel an aperture, this sets aperture S=B+2L+B0, and in the formula: B is strip width; L is one-sided flipper guide short stroke aperture; B0 is added value.And in order to prevent the turriform defective, when arriving the outlet a point of parallel sides guide plate with steel head, short stroke begins high speed closes, and closes the aperture S ' of rear parallel sides guide plate=B+B0.
But, in actual production process, following two kinds of defectives still appear easily:
1, inner ring turriform defective.In theory, the band steel head arrives before the flipper guide, and flipper guide short stroke aperture is less, just more is tending towards centering when the band steel enters pinch roll, and the probability that inner ring turriform defective occurs is also just less.But 2L is too small for parallel sides guide plate short stroke aperture, the easier generation steel-fastening of band steel head accident.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 be avoided the steel-fastening accident, it is longer to close the time that needs, and inner ring turriform defective incidence is higher.
2, steel edge portion damage defect.Since with steel head plate shape usually in various degree have shape wave or a super problem such as wide, and this moment, coiling machine tension force was not also set up, so in the process that short stroke is closed at a high speed, steel edge portion is easy to be damaged by the parallel sides guide plate.And the short stroke closing velocity is faster, and steel edge portion damage defect probability of happening is higher.But opposite, the short stroke closing velocity is too slow, inner ring turriform defective occurs easily again.
Summary of the invention
For the above-mentioned shortcoming that exists in the prior art, the purpose of this invention is to provide a kind of hot continuous rolling coiling machine parallel sides guide plate control method, be conducive to eliminate band steel inner ring turriform and limit section 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. at parallel sides guide plate middle part and exit strip detector is set respectively, to detect band steel run location;
B. at pinch roll hydraulic cylinder pressure sensor is set, detects band steel run location by detecting the pinch roll hydraulic pressure;
C. the strip width that provides according to host computer, control parallel sides guide plate arrives the initial setting aperture;
D. when the strip detector of being located at parallel sides guide plate middle part detected the band steel head, control parallel sides guide plate closed up to reduce short stroke aperture to the first control aperture;
E. when the strip detector of being located at the outlet of parallel sides guide plate detected the band steel head, control parallel sides guide plate further closed up to reduce short stroke aperture to the second control aperture;
F. after the parallel sides guide plate arrived the second control aperture, control parallel sides guide plate continued to close up to reduce short stroke aperture to the three control apertures.
In step C, described initial setting aperture is S
Just=B+2L+B0, and L 〉=40mm,
In the formula, S
JustBe the 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, described the first control aperture S
1=B+2L+B0-2L
1, and L
1=5～10mm, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1It is 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 the second control aperture S
2=B+2L+B0-2L
1-2L
2, and L
2=30-20mm, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1Be the one-sided short stroke aperture that the first control reduces, L
2It is the one-sided short stroke aperture that the second control reduces.
In step e, the speed of further closing up of described parallel sides guide plate is 100-200mm/s.
In step F, described the 3rd control aperture S
3=B+2L+B0-2L
1-2L
2-2L
3, and L
3=5-10mm, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1Be the one-sided short stroke aperture that the first control reduces, L
2Be the one-sided short stroke aperture that the second control reduces, L
3It is the one-sided short stroke aperture that the 3rd control reduces.
In step F, it is 10-100mm/s that the continuing of described parallel sides guide plate closed up speed.
After step C, if strip detector does not detect the band steel for some reason, and pressure sensor detects the pinch roll hydraulic pressure when rising to 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 designed to four-stage by the control with the parallel sides guide plate, and adopt different speed to control flipper guide in different phase and close up gradually to reduce its opening degree, to reach the purpose of effective minimizing inner ring turriform defective and steel edge portion damage defect.
Description of drawings
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.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with drawings and Examples.
Please in conjunction with Fig. 1, Fig. 3, shown in Figure 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:
At first, at parallel sides guide plate 3 middle parts and exit strip detector 9a, 9b are set respectively, to detect band steel 7 run locations.This strip detector 9a, 9b can adopt hot metal detector or laser detector.
Then at pinch roll hydraulic cylinder pressure sensor 10 is set, by detecting pinch roll 8 hydraulic pressures also for detection of band steel 7 run locations.
When batching beginning, the strip width that provides according to host computer, begin to arrive the initial setting apertures by flipper guide control system control parallel sides guide plate 3, and be retained to the strip detector 9a that is located at parallel sides guide plate 3 middle parts always and detect (the a1 point among Fig. 4) till band steel 7 heads.This initial setting aperture S
Just=B+2L+B0, in the formula, S
JustBe the 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 heads may exist camber and the super problem such as 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 the steel-fastening accident.
And when the strip detector 9a that is located at parallel sides guide plate 3 middle parts detects band steel 7 head (the a1 point among Fig. 4), close up to reduce short stroke aperture to the first control aperture by flipper guide control system control parallel sides guide plate 3, and be retained to the strip detector 9b that is located at 3 outlets of parallel sides guide plate always and detect (a point among Fig. 4) till band steel 7 heads; This first control aperture S
1=B+2L+B0-2L
1, i.e. S
1=S
Just-2L
1, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1It is the short stroke aperture that the first control reduces.Owing to after band steel 7 heads arrive parallel sides guide plate 3 middle parts, cause that because of camber the possibility of steel-fastening reduces, at this moment the short stroke aperture of parallel sides guide plate 3 can be reduced 2L1, and L1 is set as 5～10mm, with control inner ring turriform.Because parallel sides guide plate 3 middle part a1 are longer to the distance of the outlet a of parallel sides guide plate 3, damage band steel 7 limit sections when contacting with band steel 7 for preventing flipper guide, so the speed that this short stroke is closed up is chosen as at a slow speed, namely be controlled in 10～80mm/s scope.
When the strip detector 9b that is located at 3 outlets of parallel sides guide plate detects band steel 7 head (a point among Fig. 4), control again parallel sides guide plate 3 and further close up to reduce short stroke aperture to the second control aperture; This second control aperture S
2=B+2L+B0-2L
1-2L
2, i.e. S
2=S
1-2L
2, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1Be the one-sided short stroke aperture that the first control reduces, L
2It is the one-sided short stroke aperture that the second control reduces.Because band steel 7 heads have all passed through parallel sides guide plate 3, parallel sides guide plate 3 can further reduce 2L2, and L2 is made as 30～20mm, to control better the inner ring turriform.Because the distance that is exported to pinch roll 8 very short (a point among Fig. 4 is to the b point) of parallel sides guide plate 3, the band steel 7 heads pinch roll 8 rear centering difficulty of nipping increase, so the speed that the short stroke in this process is further closed up can only be selected namely to be controlled in 100～200mm/s scope fast.
At last, after control parallel sides guide plate 3 arrives the second control aperture (the b point among Fig. 4), control immediately parallel sides guide plate 3 and continue to close up to reduce short stroke aperture to the three control apertures.C point among Fig. 4 is that short stroke is closed fully.The 3rd control aperture S
3=B+2L+B0-2L
1-2L
2-2L
3, i.e. S
3=S
2-2L
3, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1Be the one-sided short stroke aperture that the first control reduces, L
2Be the one-sided short stroke aperture that the second control reduces, L
3It is the one-sided short stroke aperture that the 3rd control reduces.In this stage, neat for guaranteeing steel coil end-face, parallel sides guide plate 3 must continue to reduce 2L3, and L3 is made as 5～10mm, to approach gradually band steel 7 limit sections.Because may there be the defectives such as super wide and plate shape in band steel 7 heads, and be in the unstable stage of tension force, for preventing that flipper guide from approaching band and damaging its limit section during steel 7, so the speed that short stroke that should the stage continues to close up can only be selected at a slow speed, namely be controlled in 10～80mm/s scope.
In addition, because fog or failure and other reasons cause strip detector 9a, 9b not to detect band steel 7, then by pressure sensor pinch roll 8 cylinder pressures are carried out Real-Time Monitoring, in case when detecting pinch roll 8 hydraulic pressures and rising to more than or equal to pressure set points, directly enter 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 be decreased the needs that defective is controlled according to inner ring turriform and limit, adopts the aperture of different speed control parallel sides guide plates 3 in different phase, so has possessed following advantage:
1, can effectively reduce inner ring turriform defective: after band steel 7 heads arrive parallel sides guide plate 3 middle parts, the possibility that causes steel-fastening because of camber reduces, at this moment the short stroke aperture with parallel sides guide plate 3 reduces, namely avoided the steel-fastening accident, saved again and closed the time that short stroke needs, can effectively reduce inner ring turriform defective.
2, can effectively reduce band steel 7 limit section damage defects: the control flipper guide all adopts in beginning dwell period and final stage and approaches at a slow speed band steel 7 limit sections, can effectively reduce band steel 7 limit section damage defects.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.
Claims (10)
1. hot continuous rolling coiling machine parallel sides guide plate control method is characterized in that:
Comprise following concrete steps:
A. at parallel sides guide plate middle part and exit strip detector is set respectively, to detect band steel run location;
B. at pinch roll hydraulic cylinder pressure sensor is set, detects band steel run location by detecting the pinch roll hydraulic pressure;
C. the strip width that provides according to host computer, control parallel sides guide plate arrives the initial setting aperture;
D. when the strip detector of being located at parallel sides guide plate middle part detected the band steel head, control parallel sides guide plate closed up to reduce short stroke aperture to the first control aperture;
E. when the strip detector of being located at the outlet of parallel sides guide plate detected the band steel head, control parallel sides guide plate further closed up to reduce short stroke aperture to the second control aperture;
F. after the parallel sides guide plate arrived the second control aperture, control parallel sides guide plate continued to close up to reduce short stroke aperture to the three control apertures.
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 the formula, S
JustBe the 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, described the first control aperture S
1=B+2L+B0-2L
1, and L
1=5～10mm, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1It is the short stroke aperture that the first control reduces.
4. such as claim 1 or 3 described hot continuous rolling coiling machine parallel sides guide plate control methods, it 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 3 is characterized in that:
In step e, described the second control aperture S
2=B+2L+B0-2L
1-2L
2, and L
2=30-20mm, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1Be the one-sided short stroke aperture that the first control reduces, L
2It is the one-sided short stroke aperture that the second control reduces.
6. such as claim 1 or 5 described hot continuous rolling coiling machine parallel sides guide plate control methods, it is characterized in that:
In step e, the speed of further closing up of described parallel sides guide plate is 100-200mm/s.
7. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 1 is characterized in that:
In step F, described the 3rd control aperture S
3=B+2L+B0-2L
1-2L
2-2L
3, and L
3=5-10mm, in the formula, B is strip width, and L is the short stroke aperture of one-sided flipper guide, and B0 is added value, L
1Be the one-sided short stroke aperture that the first control reduces, L
2Be the one-sided short stroke aperture that the second control reduces, L
3It is the one-sided short stroke aperture that the 3rd control reduces.
8. such as claim 1 or 7 described hot continuous rolling coiling machine parallel sides guide plate control methods, it is characterized in that:
In step F, it is 10-100mm/s that the continuing of described parallel sides guide plate closed up speed.
9. 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 the band steel for some reason, and pressure sensor detects the pinch roll hydraulic pressure when rising to more than or equal to pressure set points, directly carries out step F.
10. hot continuous rolling coiling machine parallel sides guide plate control method as claimed in claim 9 is characterized in that:
Described pressure set points is 15-25KN.
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