CN104525575B - Correction control method is led in a kind of hot-strip reels side - Google Patents

Correction control method is led in a kind of hot-strip reels side Download PDF

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Publication number
CN104525575B
CN104525575B CN201410760814.5A CN201410760814A CN104525575B CN 104525575 B CN104525575 B CN 104525575B CN 201410760814 A CN201410760814 A CN 201410760814A CN 104525575 B CN104525575 B CN 104525575B
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flipper guide
pressure
flipper
strip steel
guide
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CN104525575A (en
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余斌
李建华
钟新建
钟华春
张南风
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Lysteel Co Ltd
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Lysteel Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

Abstract

The invention discloses a kind of hot-strip reels side and lead correction control method, before strip steel goes out milling train, two flipper guides are opened to predetermined width Wo, after detecting that strip steel head goes out finishing mill, making the pressure on two flipper guides is zero.Performing flipper guide for the first time after strip steel head enters between two flipper guides and close short stroke, the spacing making two flipper guides is Wo1, performs second time flipper guide and close short stroke after strip steel head goes out flipper guide, and making the spacing between two flipper guides is Wo2.Load from coiler pinch-roll and start to loading to terminate, the force value of two flipper guides is added up respectively, select position control side A and Stress control side B and carry out Stress control, being repeated and seek limit conversion, terminating until seeking limit, by regulating the pressure of Stress control side B, the force value making position control side A is constant, under ensureing steel edge portion alignment situation, is substantially reduced the abrasion of steel edge portion and flipper guide, prevent strip steel flanging and edge from scratching, have practicality and promotional value.

Description

Correction control method is led in a kind of hot-strip reels side
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 correcting sideslip.
Background technology
In metallurgical industry field, in hot rolling coiler, the Main Function of flipper guide is, before strip steel is nipped, strip steel is carried out centering, implement to set Stress control to its side after strip steel is nipped, opposite side selects position control, it is ensured 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 transducer and position sensor in oil cylinder.Oil cylinder is driven to drive side to lead either on or off by servo valve platform.
Leading every limit on front side of milling train tapping and be opened to predetermined width, its side is led and is opened value=strip width/2+ side-play amount/every side of 2().
Short stroke control.When the head arrival side of strip steel is led, side is led 1 short stroke and is closed startup, now position control side=strip width/2+ side-play amount/2.When the head of strip steel arrives before pinch roll, side is led 2 short strokes and is closed startup, now position control side=strip width/2+ side-play amount/2.
Start Stress control.After setting up tension force between coiling machine and milling train, being Stress control side according to system default or the selection of operative employee, such as selected fore 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;During if 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 with temperature computation by belt steel thickness.
Short stroke opens control.When the afterbody of strip steel arrives before coiler pinch-roll, short stroke is on, and side is led and opened set-point=strip width/2+ side-play amount/2.
Above control method has following defects that
Stress control side cannot select according to strip running deviation practical situation, forms head tower.The Stress control side that side is led just is manually selected by system model or operative employee before tapping, and general tapping no longer adjusts.When strip steel is towards Stress control side sideslip, side is led and strip steel can be pushed to centre, and strip steel can be because side be led correction and formed turriform.
After coiling machine is built, there is bigger pressure in position control side, causes the accident.Leading due to side takes fixed position, side to control, opposite side takes the pattern that fixation pressure controls, when strip steel is towards the serious sideslip in side, position, can cause position control side that the situation of bigger pressure occurs, side, position control side is caused to lead and strip steel excessive wear, even more than, there is strip steel flanging accident in strip steel yield limit.As when electrical sheet produces, the pressure led due to side is relatively big, causes strip steel excessive wear, and side occurs dross quality accident.
Operative employee's load is big.When catastrophic fluctuation occurs in flipper guide, as long as operative employee opens according to on-site actual situations or close side is led and improved on-the-spot scroll, when so kind when rolling, specification change, operative employee may need repeatedly to adjust.
Side is led due to abrasion, and its control accuracy reduces.The continuous friction with strip steel is led in side, causes side to lead developed width wider than setting width, reduces side and lead rectifying effect, more side change can only lead recovery precision to the later stage.Its operative employee can only be compensated attrition value, poor effect by rule of thumb, even play retroaction, cause side to lead folder steel accident.
Side guide pressure value of calculation is uncompensated, causes precise decreasing.Side guide pressure is directly calculated by pressure transducer, it is contemplated that the frictional force of action is led in the abrasion of oil cylinder, Pressure Sensor Precision and side, and its value of calculation is within positive and negative 4KN.Actually when side is led and is failure to actuate, friction should be close to 0.When rolling thin gauge strip, when setting pressure less (such as 6KN), will result in side and lead actual control pressure and fluctuate between 2KN-10KN, it not to cause poor the going of centering of strip steel effect to reprocess, it is exactly excessive centering, causes scroll flanging accident, cause entire volume steel plate to scrap.
Summary of the invention
It is an object of the invention to provide and a kind of stabilized zone coil of strip shape, the hot-strip reels side of reduction/minimizing band steel toe tower can lead 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 includes that the first flipper guide and the second flipper guide, the first driving oil cylinder and second drive oil cylinder, first piston bar and the second piston rod and the first pressure/position sensor and the second pressure/position sensor.The outside of one company's the first flipper guide of the first piston bar being arranged in the first driving oil cylinder, the outside of one company's the second flipper guide of the second piston rod being arranged 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 oil cylinder 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 of rolled band steel is tapped, 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 and second flipper guide of coiling machine is opened to predetermined width Wo, allows Wo=W2+ a/2+a/2, wherein W2For the width of strip steel, a is this trip segment the first flipper guide and the second flipper guide side-play amount with strip steel outer surface.
After head strip steel being detected goes out finishing mill, starting pressure clearing routine, the force value making the first flipper guide and the second flipper guide is zero.
After the head of strip steel enters the first flipper guide and/or the second flipper guide, performing for the first time flipper guide shutoff stroke, making the first flipper guide is Wo1 with the spacing between the second flipper guide, allows Wo1=W2+ b/2+b/2, wherein b is this trip segment the first flipper guide and the second flipper guide side-play amount with strip steel outer surface, W2Width for strip steel.
After the head of strip steel goes out the first flipper guide and/or the second flipper guide, performing second time flipper guide shutoff stroke, make the first flipper guide and the second flipper guide close, now the first flipper guide is equal to the width W of strip steel with the width Wo2 between the second flipper guide2Add add-on security allowance c, i.e. a Wo2=W again2+c/2+c/2。
Load from coiler pinch-roll and start to coiler pinch-roll to load to 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 big is position control side A, and that side selecting side guide pressure accumulated value little is Stress control side B, B side is carried out Stress control: when the force value of B side, Stress control side being detected more than seeking limit and judge force value and persistently after 0.1 second, now the first flipper guide of B side touches the edge of strip steel, position control side will be transferred in 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, compare the pressure feedback value of A side now and B side simultaneously, if the pressure feedback value of A side and B value is all higher than seeking limit judges pressure, seek limit to terminate, and be repeated and compare, until A side and B side no longer convert, make to seek limit loop ends.
After seeking limit loop ends, through the invariant position of the second position/control side, pressure transducer holding position A, constantly regulated the pressure of Stress control side B by primary importance/pressure transducer, make position control side A keep constant pressure.
Use a kind of hot-strip reels side that as above technical scheme provides to lead the control method of correction compared with prior art, have the technical effect that
Owing to this control method is the control by flipper guide pressure position, it is achieved that stablizing of strip steel shaping under low-pressure control model is led in side, reduce 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 side, side is led enforcing location, and opposite side side is led the method using pressure changeable to control, can realize that strip steel side leads that stagnation pressure force value is only under traditional mode (or method) 30~70%, can be in the case of ensureing edge alignment, be substantially reduced steel edge portion and side lead between the abrasion that causes, it is therefore prevented that flanging accident and the scuffing of steel edge portion.The method is particularly well-suited to easily scratch the production of steel, such as electrical sheet.
Accompanying drawing explanation
Fig. 1 is strip steel through view time two flipper guides.
Fig. 2 be control during the displacement form schematic diagram of flipper guide.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
As shown in Figure 1, enforcement hot-strip reels side is led the equipment of correction control method and is included that the first flipper guide 1 and the second flipper guide 2, first drive oil cylinder 3 and second to drive oil cylinder 6, first piston bar 4 and the second piston rod 5 and primary importance/pressure transducer 7 and the second position/pressure transducer 7a, wherein the first flipper guide 1 also referred to as transmission side flipper guide 1, second flipper guide 2 also referred to as fore side flipper guide 2, first drives oil cylinder 3 also referred to as transmission side to drive oil cylinder 3, and second drives oil cylinder 6 also referred to as fore side to drive oil cylinder 6.The outside of one company's the first flipper guide 1 of the first piston bar 4 being arranged in the first driving oil cylinder 3, it is arranged on the outside of company's 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 transducer 7 is installed first, drive the top of oil cylinder 6 that the second position/pressure transducer 7a is installed second.Can realize Accurate Position Control, its control accuracy is ± 0.5mm.
Hot-strip reels flipper guide is positioned at before coiler pinch-roll, can move along milling method in the range of certain angle.The Main Function of flipper guide (i.e. first flipper guide 1 and the general name of the second flipper guide 2) is that strip steel 8 is carried out centering and guiding, strip steel 8 is smoothly imported pinch roll and coiling machine.The machine readable (i.e. spacing) of two flipper guides is that 850~1800mm(these values include that the width 900~1600mm of strip steel 8 goes up the outer safety allowance 100mm and interior safety allowance 50mm of every side again).
The first flipper guide 1 before coiler pinch-roll all includes one block of parallel-plate (parallel with the rolling direction of strip steel 8) and one block of hang plate with the second flipper guide 2.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 to first, and its control flow is realized by programmable controller (PLC).
A kind of hot-strip reels side of the present invention is led correction control method and is primarily directed to the pressure changeable control method of side guide plate of hot rolling recoiler.
As in figure 2 it is shown, before finishing mill is tapped, synchronous averaging first drives oil cylinder 3 and second to drive oil cylinder 6, it is opened to predetermined width Wo through first flipper guide the 1, second flipper guide 2 of first piston bar 4 and second 5 coiling machines of piston rod, makes Wo=W2+ a/2+a/2, this process is completed by first and second position/pressure transducer and programmable controller.Wherein W2For the width of strip steel 8, a is this trip segment (such as O-E section) the first flipper guide 1 and the second flipper guide 2 side-play amount with strip steel 8 outer surface, desirable a=150~200mm.
Going out finishing mill when head strip steel 8 being detected and initially enter the first flipper guide 1 and/or after the second side leads 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 strip steel 8 enters the first flipper guide 1 and the second flipper guide 2, performing flipper guide for the first time and close (short) stroke, making the spacing between the first flipper guide 1 and the second flipper guide 2 is the E-F section in Wo1(Fig. 2), make Wo1=W2+ b/2+b/2, this process is also completed by first and second position/pressure transducer and programmable controller.Wherein b is this trip segment (such as E-F section) the first flipper guide 1 and the second flipper guide 2 side-play amount with strip steel 8 outer surface, desirable b=100~150mm.
After the head tracing into strip steel 8 goes out the first flipper guide 1 and/or the second flipper guide 2, start the first driving oil cylinder 3 and second simultaneously and drive oil cylinder 6, through first piston bar 4 and the second piston rod 5 by first flipper guide the 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 close (the F-D section of Fig. 2), make the width W equal to strip steel 8 of the width Wo2 between the first flipper guide 1 and the second flipper guide 22Adding add-on security allowance c again, this process can be by first and second position/pressure transducer and Programmable Controller.Desirable c=50~100mm.
Load from coiler pinch-roll and start to coiler pinch-roll to load to 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 transducer 7 and the second position/pressure transducer 7a, and that side selecting side guide pressure accumulated value big is position control side A, and that side selecting side guide pressure accumulated value little is Stress control side B, and B side is carried out Stress control: when the force value of B side, Stress control side being detected more than seeking limit and judge force value and persistently after 0.1 second, now the first flipper guide 1 of B side is successfully contacted the edge of strip steel 8, immediately B side is converted into position control side, its setting value changes positional value now into.When B side is changed into position control side and A side is changed into Stress control side complete conversion after, compare the pressure feedback value of position control side now and Stress control side simultaneously, if the force value of position control side B and Stress control side A is all higher than seeking limit judges pressure, seek limit to terminate, and be repeated and compare, until A side and B side no longer convert, make to seek limit and terminate.After seeking limit loop ends, through the invariant position of the second position/pressure transducer 7a holding position control side A, constantly regulated the pressure of Stress control side B by primary importance/pressure transducer 7, make position control side A keep constant pressure.
After the afterbody of strip steel 8 passes through the first flipper guide 1 and/or the second flipper guide 2, drive through first and protect width W between oil cylinder 3 and the first flipper guide 1 and second flipper guide 2 of second driving 6 strip steel 8 coiling machines of oil cylinder1
Elaborate manipulation, can realize the purpose described in the present patent application.

Claims (1)

  1. null1. correction control method is led in a hot-strip reels side,Control equipment includes 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),The outside of one company's the first flipper guide (1) of the first piston bar (4) being arranged in the first driving oil cylinder (3),The outside of one company's the second flipper guide (2) of the second piston rod (5) being arranged 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 oil cylinder (6) 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 of rolled band steel (8) is tapped,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), the first flipper guide (1) and second flipper guide (2) of coiling machine are opened to predetermined width Wo,Allow Wo=W2+ a/2+a/2, wherein a is this trip segment the first flipper guide (1) and the side-play amount of the second flipper guide (2) same to strip steel (8) outer surface;
    After head strip steel (8) being detected goes out finishing mill, starting pressure clearing routine, the force value making the first flipper guide (1) and the second flipper guide (2) is zero;
    After the head of strip steel (8) enters the first flipper guide (1) and/or the second flipper guide (2), performing for the first time flipper guide shutoff stroke, making the first flipper guide (1) is Wo1 with the spacing between the second flipper guide (2), allows Wo1=W2+ b/2+b/2, wherein b is the first flipper guide (1) and the side-play amount of the second flipper guide (2) same to strip steel (8) outer surface of this trip segment;
    After the head of strip steel (8) goes out the first flipper guide (1) and/or the second flipper guide (2), perform second time flipper guide shutoff stroke, make the first flipper guide (1) and the second flipper guide (2) close, make the first flipper guide (1) be equal to the width W of strip steel (8) with the width Wo2 between the second flipper guide (2)2Add add-on security allowance c, i.e. a Wo2=W again2+c/2+c/2;
    Load from coiler pinch-roll and start to coiler pinch-roll to load to 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 big is position control side A, that side selecting side guide pressure accumulated value little is Stress control side B, B side is carried out Stress control: when the force value of B side, Stress control side being detected more than seeking limit and judge force value and persistently after 0.1 second, now first flipper guide (1) of B side touches the edge of strip 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, compare the pressure feedback value of A side now and B side simultaneously, if the pressure feedback value of A side and B value is all higher than seeking limit judges pressure, seek limit to terminate, and be repeated and compare, until A side and B side no longer convert, make to seek limit loop ends;
    After seeking limit loop ends, through the invariant position of the second position/pressure transducer (7a) holding position control side A, constantly regulated the pressure of Stress control side B by primary importance/pressure transducer (7), make position control side A keep constant pressure.
CN201410760814.5A 2014-12-12 2014-12-12 Correction control method is led in a kind of hot-strip reels side Active CN104525575B (en)

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CN104841723B (en) * 2015-04-30 2017-01-18 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
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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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CN112139258A (en) * 2019-06-26 2020-12-29 宝山钢铁股份有限公司 Control method of side guide plate of hot rolling coiler
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CN111922120A (en) * 2020-07-09 2020-11-13 首钢京唐钢铁联合有限责任公司 Method for preventing side guide plate of coiling machine from clamping steel
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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.