CN104525575A - Hot rolled strip steel coiler side guide deviation correction control method - Google Patents
Hot rolled strip steel coiler side guide deviation correction control method Download PDFInfo
- Publication number
- CN104525575A CN104525575A CN201410760814.5A CN201410760814A CN104525575A CN 104525575 A CN104525575 A CN 104525575A CN 201410760814 A CN201410760814 A CN 201410760814A CN 104525575 A CN104525575 A CN 104525575A
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- Prior art keywords
- flipper guide
- pressure
- side guide
- oil cylinder
- guide
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention discloses a hot rolled strip steel coiler side guide deviation correction control method. The method includes the steps of opening two side guide plates to a preset width Wo before strip steel is out of a rolling mill and setting the two side guide plates to be under the pressure of zero when the head of the strip steel is detected to be out of a finishing mill; performing a first short stroke closing on the side guide plates to enable the spacing of the two side guide plates to be Wo1 when the head of the strip steel enters a position between the two side guide plates and performing a second short stroke closing on the side guide plates to enable the spacing of the two side guide plates to be Wo2 when the head of the strip steel is out of the position between the two side guide plates; accumulating pressure values of the two side guide plates respectively from the start of loading of a pinch roll of a coiler to the end of the loading of the pinch roll of the coiler, selecting a position control side A and a pressure control side B, performing pressure control, and repeatedly performing edge seeking transition until the end of the edge seeking. The hot rolled strip steel coiler side guide deviation correction control method enables the position control side A to be constant in pressure value by adjusting the pressure of the pressure control side B, greatly reduces the abrasion of strip steel edges and the side guide plates to prevent the strip steel edges from folding and scratching under the condition of ensuring the alignment of the strip steel edges and has practical and popularization values.
Description
Technical field
the present invention relates to a kind of control method, particularly relate to a kind of hot-strip reels side in hot strip rolling technique and lead the control method of correcting sideslip.
Background technology
in metallurgical industry field, in hot rolling coiler, the Main Function of flipper guide carries out centering to band steel before band steel is nipped, after band steel is nipped, implement setting pressure to its side control, opposite side chosen position controls, and ensures that steel coil end-face is neat, prevents the defects such as limit damage, fault.Hot rolling reeling pusher side is led by 4 hydraulic oil cylinder driving, is provided with pressure sensor and position sensor in oil cylinder.Drive oil cylinder to drive side to lead by servo valve platform and open closedown.
milling train tapping front side is led every limit and is opened to predetermined width, and its side is led and opened value=strip width/every side of 2+ side-play amount/2().
short stroke control.When being with the head of steel arrival side to lead, side is led 1 short stroke and is closed startup, now position control side=strip width/2+ side-play amount/2.When being with the head of steel to arrive before pinch roll, side is led 2 short strokes and is closed startup, now position control side=strip width/2+ side-play amount/2.
starting pressure controls.Set up tension force between coiling machine and milling train after, according to the selection of system default or operative employee, if selected fore side is Stress control side, transmission side is position control side, or on the contrary.Wherein position control sidelong glance scale value=strip width/2+ side-play amount/2; If when the pressure that Stress control side detects arrives desired value, Stress control side transfers Stress control to keep target pressure value, and described pressure target value is drawn by belt steel thickness and temperature computation.
short stroke opens control.When being with the afterbody of steel to arrive before coiler pinch-roll, short stroke opens startup, and side is led and opened set-point=strip width/2+ side-play amount/2.
there is following defect in above control method:
stress control side cannot be selected according to strip running deviation actual conditions, forms head tower.The Stress control side that side is led just manually is selected by system model or operative employee before tapping, and general tapping no longer adjusts.When being with steel towards Stress control side sideslip, side is led and can be pushed band steel to centre, and band steel can because correction be led in side form turriform.
there is larger pressure in position control side after coiling machine is built, causes the accident.Leading due to side takes fixed position, side to control, the pattern that opposite side takes fixation pressure to control, when band steel sideslip serious in position side, position control side can be caused to occur the situation of larger pressure, side, position control side is caused to lead and be with steel excessive wear, even exceed band steel yield limit, occur band steel flanging accident.As when electrical sheet is produced, the pressure of leading due to side is comparatively large, and cause band steel excessive wear, dross quality accident occurs in side.
operative employee's load is large.When catastrophic fluctuation appears in flipper guide, lead improve on-the-spot scroll as long as operative employee opens or close side according to on-site actual situations, when the kind like this when rolling, specification change, operative employee may need repeatedly to adjust.
side is led due to wearing and tearing, and its control accuracy reduces.Side is led and the continuous friction with steel, cause side lead developed width than setting width wide, reduce side lead rectifying effect, more side change can only lead recovery precision to the later stage.Can only compensate for wear value by rule of thumb to its operative employee, poor effect, even plays reaction, causes side to lead folder steel accident.
side guide pressure calculated value is uncompensated, causes precise decreasing.Side guide pressure is directly calculated by pressure sensor, and consider that the friction of action is led in the wearing and tearing of oil cylinder, Pressure Sensor Precision and side, its calculated value is within positive and negative 4KN.In fact lead when being failure to actuate in side, side guide pressure should close to 0.When rolling thin gauge strip, as setting pressure less (as 6KN), side will be caused to lead working control pressure and to fluctuate between 2KN-10KN, not cause poor the going of centering of strip steel effect to reprocess, be exactly excessive centering, cause scroll flanging accident, cause entire volume steel plate to scrap.
Summary of the invention
the object of the present invention is to provide a kind of Absorbable organic halogens band coil of strip shape, the hot-strip reels side of reduction/minimizing band steel toe tower leads the control method of correction.
for achieving the above object, the technical solution used in the present invention is: correction control method is led in described a kind of hot-strip reels side, and the equipment implementing this control method comprises the first flipper guide and the second flipper guide, first and drives oil cylinder and second to drive oil cylinder, first piston bar and the second piston rod and the first pressure/position sensor and the second pressure/position sensor.Be arranged on the outside of company first flipper guide of the first piston bar in the first driving oil cylinder, be arranged on the outside of company second flipper guide of the second piston rod in the second driving oil cylinder, the top of oil cylinder is driven to have the first pressure/position sensor first, drive the top of cylinder of living to have the second pressure/position sensor second, wherein first drive oil cylinder and first piston bar and second to drive oil cylinder and the second piston rod by programmable controller controls.
before the finishing mill tapping of rolled band steel, synchronous averaging first drives oil cylinder and second to drive oil cylinder, through first piston bar and the second piston rod, the first flipper guide of coiling machine and the second flipper guide is opened to predetermined width Wo, allows Wo=W
2
+ a/2+a/2, wherein W
2
for being with the width of steel, a is the side-play amount of this trip segment first flipper guide and the second flipper guide same band steel outer surface.
after detecting that the head of band steel goes out finishing mill, starting pressure clearing routine, makes the force value of the first flipper guide and the second flipper guide be zero;
after the head of band steel enters the first flipper guide and/or the second flipper guide, perform first time flipper guide shutoff stroke, make the first flipper guide be Wo1 with the spacing between the second flipper guide, allow Wo1=W
2
+ b/2+b/2, wherein b is the side-play amount of this trip segment first flipper guide and the second flipper guide same band steel outer surface, W
2
for being with the width of steel.
after the head of band steel goes out the first flipper guide and/or the second flipper guide, perform second time flipper guide shutoff stroke, the first flipper guide and the second flipper guide are closed, and now the first flipper guide equals with the width W o2 between the second flipper guide the width W being with steel
2
add add-on security allowance c, i.e. a Wo2=W again
2
+ c/2+c/2.
load to coiler pinch-roll from coiler pinch-roll loads and terminate, the force value of the first flipper guide side and the second flipper guide side is added up respectively, that side selecting side guide pressure accumulated value large is position control side A, and that side selecting side guide pressure accumulated value little is Stress control side B, Stress control is carried out to B side: seek limit and judge force value when detecting that the force value of B side, Stress control side is greater than and continue after 0.1 second, now the first flipper guide of B side touches the edge of band steel, position control side is transferred to by B side, the setting value of position control is positional value now.
when B side being changed to position control side and changing A side into Stress control rear flank, the pressure feedback value of A side more now and B side simultaneously, if the pressure feedback value of A side and B value is all greater than seek limit judgement pressure, seek limit to terminate, and repeatedly compare, until A side and B side no longer convert, make to seek limit circulation and terminate.
when seek limit circulation terminate after, through the invariant position of the second place/control side, pressure sensor holding position A, constantly regulated the pressure of Stress control side B by primary importance/pressure sensor, make position control side A keep constant pressure.
the control method of correction is led compared with prior art in a kind of hot-strip reels side adopting as above technical scheme to provide, and technique effect is:
due to the control that this control method is by flipper guide pressure position, what achieve that side leads with steel shaping under low-pressure control model is stable, reduces head tower.Carry out side guide pressure by strip steel head to seek edge mode and also reduce band steel toe tower simultaneously.
after tension force set up by milling train and coiling machine, control to realize the constant of position and pressure by leading enforcing location to side, side, and opposite side side is led to the method adopting pressure changeable to control, can realize being with steel side to lead stagnation pressure force value and be only 30 ~ 70% under traditional mode (or method), can when ensureing edge alignment, greatly reduce steel edge portion and side lead between the wearing and tearing that cause, prevent the scuffing of flanging accident and steel edge portion.The method is specially adapted to the production easily scratching steel, as electrical sheet.
Accompanying drawing explanation
fig. 1 for band steel through two flipper guides time view, be also Figure of abstract of the present invention.
fig. 2 is the displacement form schematic diagram of flipper guide in control procedure.
Detailed description of the invention
below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
as shown in Figure 1, the equipment of implementing to lead correction control method in hot-strip reels side comprises the first flipper guide 1 and the second flipper guide 2, first and drives oil cylinder 3 and second to drive oil cylinder 6, first piston bar 4 and the second piston rod 5 and primary importance/pressure sensor 7 and the second place/pressure sensor 7a, wherein the first flipper guide 1 also can be referred to as transmission side flipper guide 1, second flipper guide 2 also can be referred to as fore side flipper guide 2, first drives oil cylinder 3 also can be referred to as transmission side drives oil cylinder 3, second to drive oil cylinder 6 also can be referred to as fore side driving oil cylinder 6.Be arranged on the outside of company first flipper guide 1 of the first piston bar 4 in the first driving oil cylinder 3, be arranged on the outside of company second flipper guide 2 of the second piston rod 5 in the second driving oil cylinder 6, drive the top of oil cylinder 3 that primary importance/pressure sensor 7 has been installed first, drive the top of oil cylinder 6 that the second place/pressure sensor 7a is installed second.Can realize Accurate Position Control, it controls essence auspicious is ± 0.5mm.
hot-strip reels flipper guide is positioned at before coiler pinch-roll, can move along milling method within the scope of certain angle.The Main Function of flipper guide (i.e. the general name of the first flipper guide 1 and the second flipper guide 2) carries out centering and guiding to band steel 8, and band steel 8 is imported pinch roll and coiling machine reposefully.The machine readable (i.e. spacing) of two flipper guides is that width 900 ~ 1600mm that this value of 850 ~ 1800mm(comprises band steel 8 goes up the outer safety allowance 100mm of every side and interior safety allowance 50mm again.
the first flipper guide 1 before coiler pinch-roll and the second flipper guide 2 all comprise one block of parallel-plate (parallel with the rolling direction of band steel 8) and one block of hang plate.First flipper guide 1 and the second flipper guide 2 drive oil cylinder 3 and/or second to drive oil cylinder 6 to control by servo valve platform first, and its control flow is realized by programmable controller (PLC).
a kind of hot-strip reels side of the present invention lead correction control method mainly for be the pressure changeable control method of side guide plate of hot rolling recoiler.
as shown in Figure 2, before finishing mill tapping, synchronous averaging first drives oil cylinder 3 and second to drive oil cylinder 6, through first piston bar 4 and the second piston rod 5, first flipper guide 1, second flipper guide 2 of coiling machine is opened to predetermined width Wo, makes Wo=W
2
+ a/2+a/2, this process is completed by first and second position/pressure sensor and programmable controller.Wherein W
2
for being with the width of steel 8, a is the side-play amount of this trip segment (as O-E section) first flipper guide 1 and the second flipper guide 2 same band steel 8 outer surface, desirable a=100 ~ 200mm.
start to enter the first flipper guide 1 when detecting the head of band steel 8 to go out finishing mill and/or the second side is led after between 2, start flipper guide pressure clearing routine, the pressure making the first flipper guide 1 and the second flipper guide 2 is zero.
after the head of band steel 8 enters the first flipper guide 1 and the second flipper guide 2, perform first time flipper guide and close (short) stroke, make the spacing between the first flipper guide 1 and the second flipper guide 2 be E-F section in Wo1(Fig. 2), make Wo1=W
2
+ b/2+b/2, this process is also completed by first and second position/pressure sensor and programmable controller.Wherein b is the side-play amount of this trip segment (as E-F section) first flipper guide 1 and the second flipper guide 2 same band steel 8 outer surface, desirable b=60 ~ 100mm.
after the head tracing into band steel 8 goes out the first flipper guide 1 and/or the second flipper guide 2, start first drives oil cylinder 3 and second to drive oil cylinder 6 simultaneously, through first piston bar 4 and the second piston rod 5 by the first flipper guide 1, second flipper guide 2 action, perform second time flipper guide and close (short) stroke, allow the first flipper guide 1 and the second flipper guide 2 closedown (the F-D section of Fig. 2), make the width W o2 between the first flipper guide 1 and the second flipper guide 2 equal to be with the width W of steel 8
2
add an add-on security allowance c again, this process can by first and second position/pressure sensor and Programmable Controller.Desirable c=10 ~ 40mm.
load to coiler pinch-roll from coiler pinch-roll loads and terminate, add up respectively to the first flipper guide 1 side and to the force value of the second flipper guide 2 side through primary importance/pressure sensor 7 and the second place/pressure sensor 7a, and that side selecting side guide pressure accumulated value large is position control side A, and that side selecting side guide pressure accumulated value little is Stress control side B, and Stress control is carried out to B side: seek limit and judge force value when detecting that the force value of B side, Stress control side is greater than and continue after 0.1 second, now the first flipper guide 1 of B side successfully touches the edge of band steel 8, immediately B side is converted into position control, its setting value changes positional value now into.When B side being changed into position control side and A side being changed into after Stress control side completes conversion, the pressure feedback value of position control side more now and Stress control side simultaneously, if the force value of position control side B and Stress control side A is all greater than seek limit judgement pressure, then seek limit to terminate, otherwise proceed pressure position to control to switch, terminate until seek limit.When seeking after limit (circulation) terminates, through the invariant position of the second place/pressure sensor 7a holding position control side A, constantly being regulated the pressure of Stress control side B by primary importance/pressure sensor 7, making position control side A keep constant pressure.
after the afterbody of band steel 8 passes through the first flipper guide 1 and/or the second flipper guide 2, oil cylinder 3 and second is driven to drive oil cylinder 6 to protect width W between the first flipper guide 1 of band steel 8 coiling machine and the second flipper guide 2 through first
1
.
elaborate manipulation, can realize the object described in the present patent application.
Claims (1)
1. correction control method is led in a hot-strip reels side, control appliance comprises the first flipper guide (1) and the second flipper guide (2), first drives oil cylinder (3) and second to drive oil cylinder (6), first piston bar (4) and the second piston rod (5) and the first pressure/position sensor (7) and the second pressure/position sensor (7a), be arranged on the outside of a company first flipper guide (1) of the first piston bar (4) in the first driving oil cylinder (3), be arranged on the outside of a company second flipper guide (2) of the second piston rod (5) in the second driving oil cylinder (6), the top of oil cylinder (3) is driven to have the first pressure/position sensor (7) first, the top of cylinder (6) of living is driven to have the second pressure/position sensor (7a) second, wherein first oil cylinder (3) and first piston bar (4) and second is driven to drive oil cylinder (6) and the second piston rod (5) by programmable controller controls, it is characterized in that: before the finishing mill tapping of rolled band steel (8), synchronous averaging first drives oil cylinder (3) and second to drive oil cylinder (6), through first piston bar (4) and the second piston rod (5), first flipper guide (1) of coiling machine and the second flipper guide (2) are opened to predetermined width Wo, allow Wo=W
2+ a/2+a/2, wherein a is the same side-play amount with steel (8) outer surface of this trip segment first flipper guide (1) and the second flipper guide (2),
After detecting that the head of band steel (8) goes out finishing mill, starting pressure clearing routine, makes the force value of the first flipper guide (1) and the second flipper guide (2) be zero;
After the head of band steel (8) enters the first flipper guide (1) and/or the second flipper guide (2), perform first time flipper guide shutoff stroke, make the first flipper guide (1) be Wo with the spacing between the second flipper guide (2)
1, allow Wo1=W
2+ b/2+b/2, wherein b is the first flipper guide (1) and the same side-play amount with steel (8) outer surface of the second flipper guide (2) of this trip segment;
After the head of band steel (8) goes out the first flipper guide (1) and/or the second flipper guide (2), perform second time flipper guide shutoff stroke, first flipper guide (1) and the second flipper guide (2) are closed, makes the first flipper guide (1) equal to be with the width W of steel (8) with the width W o2 between the second flipper guide (2)
2add add-on security allowance c, i.e. a Wo2=W again
2+ c/2+c/2;
Load to coiler pinch-roll from coiler pinch-roll loads and terminate, the force value of the first flipper guide (1) side and the second flipper guide (2) side is added up respectively, that side selecting side guide pressure accumulated value large is position control side A, that side selecting side guide pressure accumulated value little is Stress control side B, Stress control is carried out to B side: seek limit and judge force value when detecting that the force value of B side, Stress control side is greater than and continue after 0.1 second, now first flipper guide (1) of B side touches the edge of band steel (8), transfer B side to position control side, the setting value of position control side is positional value now,
When B side being changed to position control side and changing A side into Stress control rear flank, the pressure feedback value of A side more now and B side simultaneously, if the pressure feedback value of A side and B value is all greater than seek limit judgement pressure, seek limit to terminate, and repeatedly compare, until A side and B side no longer convert, make to seek limit circulation and terminate;
When seeking after limit circulation terminates, through the invariant position of the second place/pressure sensor (7a) holding position control side A, constantly being regulated the pressure of Stress control side B by primary importance/pressure sensor (7), making position control side A keep constant pressure.
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|---|---|---|---|
| CN201410760814.5A CN104525575B (en) | 2014-12-12 | 2014-12-12 | Correction control method is led in a kind of hot-strip reels side |
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|---|---|---|---|
| CN201410760814.5A CN104525575B (en) | 2014-12-12 | 2014-12-12 | Correction control method is led in a kind of hot-strip reels side |
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| CN104525575A true CN104525575A (en) | 2015-04-22 |
| CN104525575B CN104525575B (en) | 2016-08-31 |
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| CN104841723A (en) * | 2015-04-30 | 2015-08-19 | 山东钢铁股份有限公司 | Method for controlling opening and closing of side guide plate of hot rolling strip steel reeling machine |
| CN105855301A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | Device and method for measuring whether strip steel deflects or not |
| CN107597880A (en) * | 2017-09-15 | 2018-01-19 | 首钢京唐钢铁联合有限责任公司 | A kind of side guide plate of recoiling machine control method for reducing wearing plate abrasion |
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| CN105855301A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | Device and method for measuring whether strip steel deflects or not |
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Effective date of registration: 20201124 Address after: 417000 Shuangling Building, 1005 Gangui Road, Huangnitang, Louxing District, Loudi City, Hunan Province Patentee after: LYSTEEL Co.,Ltd. Patentee after: Hunan Hualing LIANGANG special new material Co., Ltd Address before: 417009 Loudi City, Hunan province Huangnitang Louxing district along the River Road No. 001 Patentee before: LYSTEEL Co.,Ltd. Patentee before: HUNAN HUALING LIANGANG STEEL SHEET Co.,Ltd. |