CN103372576B - Temper mill push-up cylinder roll gap control device and roll gap synchronous control method - Google Patents
Temper mill push-up cylinder roll gap control device and roll gap synchronous control method Download PDFInfo
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- CN103372576B CN103372576B CN201210107871.4A CN201210107871A CN103372576B CN 103372576 B CN103372576 B CN 103372576B CN 201210107871 A CN201210107871 A CN 201210107871A CN 103372576 B CN103372576 B CN 103372576B
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Abstract
The invention relates to a temper mill push-up cylinder roll gap control device and a roll gap synchronous control method. The temper mill push-up cylinder roll gap control device mainly comprises a frame, an upper roller, a lower roller, a hydraulic pipeline and a safety valve. The upper roller and the lower roller can move up and down. The temper mill push-up cylinder roll gap control device further comprises push-up cylinders, push-up cylinder position sensors, servo valves and electromagnetic valves. The push-up cylinders are positioned at the bottom of the frame. The push-up cylinder position sensors are directly connected with a piston of an oil cylinder to trace operating travel of the push-up cylinders. The servo valves drive the push-up cylinders on two sides to move to control rolling force of a temper mill and deviation and inclination control of the rolling force. The electromagnetic valves drive the push-up cylinders on two sides to move to control quick opening and closing of the rollers of the temper mill. Compared with the prior art, the temper mill push-up cylinder roll gap control device is simple and practicable, roll gap out-of-tolerance of the rollers of the temper mill can be avoided, and yield rate of continuous temper mill units can be significantly improved. Besides, the temper mill push-up cylinder roll gap control device is worthy of promotion in temper mill production lines provided with similar magnetic valve control cylinders.
Description
Technical field
The present invention relates to planisher and push to cylinder roll gap control technique, especially relate to a kind of method that planisher pushes to cylinder gap preset device and roll gap synchronization control, belong to steel rolling Computer Control Technology field.
Background technology
Modern planisher adopts high-pressure hydraulic to control, mainly comprise pressure suppling system, servo valve, magnetic valve, last executive item is the oil cylinder of hydraulic pressure adjustment, compared with early stage motor-driven system, hydraulic system is dynamic system, corresponding faster to the change of system.
In prior art, cold rolling mill connects and moves back temper mill roller and control employing and push to hydraulic system, pushes to cylinder act on roll and realize roll-force, gap preset by both sides in frame.System pushed to by so-called planisher is exactly that upper backup roll (working roll) is in a fixed position (i.e. rolling center line position), and lower backing roll (working roll) up leans on by bottom frame, completes roll-force or gap preset task; In normal production, planisher adopts general rolling force control model, and come into operation rolling force deviation or inclination control are to ensure planisher outlet strip shape quality.
Pushing in system at planisher, in order to ensure roller gap quick acting, often adopting following pattern:
(1) control model is opened soon
In emergency circumstances, need to open roll gap fast, this pattern can be selected.Can also occur electrically or mechanical breakdown and gap preset can not be carried out time open roll gap.
(2) roll change roll gap school null mode
When planisher changes backing roll or working roll, need lower backing roll (working roll) up to lean on by bottom frame, complete roll gap school idle task, and relative zero-bit when current roll gap is worked as planisher.
Planisher roll change roller rest school zero process is divided into 2 stages: the 1st stage, and backing roll (working roll) is positioned at bottom frame, when the distance pushing to cylinder and roll line is greater than 10mm, adopts solenoid control hydraulic cylinder, realizes fast feed action; The distance pushing to cylinder and roll line is switched to servo valve control hydraulic cylinder when below 10mm.Magnetic valve action, front, for school zero initial stage, meets the requirement that roll gap is closed at a high speed; Servo valve action, rear, for roll-force and Strip Shape Control, meet high accuracy and regulates requirement.
Adopt solenoid control hydraulic cylinder, push to cylinder responsiveness than very fast, but belong to Digital Signals due to magnetic valve, only have turn-on and turn-off two states, without linear regulating function; Both sides magnetic valve simultaneously conducting or simultaneously turn off in original control technology, not considering that cylinder traveled distance is pushed in both sides, there is certain technological deficiency, so when pushing to cylinder action, cannot ensure that cylinder synchronization action is pushed in planisher both sides.Often occur in practical application that planisher both sides roll gap deviation is comparatively large, namely inclined oversize, planisher school zero failure, cause roll to be opened and not smooth, unit lumber recovery is had a strong impact on for this problem tinuous production.
Summary of the invention
Technical problem to be solved by this invention is, for the limitation of solenoid control position existence itself, planisher bottom roll draws close the nonsynchronous problem of (roll gap closedown) period objective reality roll both sides roll gap by bottom to topping roll; In order to address this problem, propose to draw close (roll gap be no more than 10mm) period by bottom to topping roll at temper mill roller, by planisher both sides roll gap deviation and both sides solenoid valve conduction and shut-in time are set up functional relation, ensure that both sides roll gap deviation is in more among a small circle, reaches synchronous object.
In order to solve the problem, the technical scheme that unit planisher pushes to cylinder roll gap synchronization control method is moved back by the company of being applicable to of the present invention, cylinder gap preset device pushed to by a kind of planisher, this device mainly comprises with lower component, frame, the topping roll moved up and down and bottom roll, fluid pressure line and safety valve, described device also comprises pushes to cylinder, pushes to cylinder and is positioned at bottom frame; Push to cylinder position sensor, be directly connected with the piston pushing to cylinder, follow the tracks of and push to cylinder actuating length; Servo valve, drives both sides to push to cylinder and moves, control and rolling force deviation or inclination control for planisher roll-force; Magnetic valve, drives both sides to push to cylinder and moves, open and close control fast for temper mill roller; Above-mentionedly push to cylinder, push to cylinder position sensor, servo valve, magnetic valve all arrange one at transmission side, fore side.
Controlling temper mill roller at computer pushes on the hydraulic cylinder piston of drive system side, fore side, and the position sensor that holding wire is input to computer installed respectively by transmission side, fore side hydraulic cylinder piston connecting rod, and technical measures of the present invention is as follows:
(1) when planisher roll change school zero or roller rest, roll pushes to cylinder action by bottom planisher frame by solenoid-driven, and simultaneous computer pushes to cylinder total kilometres and a fixed position (if roll gap is 10mm) according to when preliminary roller footpath calculates; Whole process both sides position sensor detects transmission side in real time and fore side pushes to cylinder stroke.
(2) computer calculates roll gap deviation according to position sensor measured value, computing formula: roll gap deviation=transmission side physical location-fore side physical location.
(3) computer controls 2 solenoid valve conductions, cut out: as roll gap deviation >0 and
, transmission side closed electromagnetic valve, fore side magnetic valve continues conducting, and roll is lifted on continuing, and roll gap reduces, and due to transmission side closed electromagnetic valve, transmission side is pushed to cylinder and stopped action, and roll gap deviation reduces; As roll gap deviation <0 and
, fore side closed electromagnetic valve, transmission side magnetic valve continues conducting, and roll is lifted on continuing, and roll gap reduces, and due to fore side closed electromagnetic valve, fore side is pushed to cylinder and stopped action, and roll gap deviation reduces.
(4) when
, roll does not arrive fixed position, 2 magnetic valve conductings simultaneously, and roll is lifted on continuing, and roll gap reduces; When
, and roll does not arrive fixed position, performs (3).
(5) reach fixed position when roll is lifted to, planisher pushes to systematic evaluation to servo valve control, carries out remaining school idle task.
Technique scheme can realize planisher both sides and push to cylinder synchronous operation when solenoid-driven, and non-for original magnetic valve controlled circumstances is improved to position deviation close-loop control mode.
Relative to prior art, the present invention is simple, the roll gap off-gage phenomenon of avoiding planisher roller rest to occur, significantly improves tandem mill planisher lumber recovery, is worth producing on line at the planisher possessing similar solenoid control hydraulic cylinder promoting.
accompanying drawing illustrates:
Fig. 1 is that cylinder control system figure pushed to by planisher;
Fig. 2 pushes to cylinder roll gap synchronization control logic figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment 1:
As shown in Figure 1, cylinder gap preset device pushed to by planisher, mainly comprises with lower component, frame, the topping roll moved up and down and bottom roll, fluid pressure line and safety valve, and described device also comprises:
Push to cylinder, hydraulic cylinder is positioned at bottom frame;
Push to cylinder position sensor, be directly connected with the piston pushing to cylinder, follow the tracks of and push to cylinder actuating length;
Servo valve, drives both sides to push to cylinder and moves, control and rolling force deviation or inclination control for planisher roll-force; Magnetic valve, drives both sides to push to cylinder and moves, open and close control fast for temper mill roller; Above-mentionedly push to cylinder, push to cylinder position sensor, servo valve, magnetic valve all arrange one at transmission side, fore side.
The present embodiment to undergo technological transformation realization to the planisher that existing installation computer controls transmission side, fore side pushes to cylinder, magnetic valve synchronous control technique is increased utilizing existing equipment, computer controls magnetic valve according to improved step, and four roller planishers push to cylinder control system as shown in Figure 1.
Connect and move back planisher and allow maximum support roller roller footpath 1100mm, maximum functional roller roller footpath 450mm, planisher configure most big roller footpath and roll to fall lower roll surface and rolling center linear distance under the situation of bottom be 95mm; Planisher current actual support roller roller footpath is 1090mm, and real work roller roller footpath is 440.Push to cylinder roll gap synchronization to control as shown in Figure 2.The rate-determining steps of computer-chronograph of the present invention is adopted to be:
(1) computer calculates according to current backing roll, working roll roller footpath the total kilometres that cylinder action pushed to by planisher, and namely lower roll surface can lift the distance to rolling centerline above.Computing formula is as follows:
result of calculation is:
(2) computer sends roller rest order, both sides solenoid valve conduction, and push to cylinder jack-up roll and rise, position sensor starts counting simultaneously, and planisher roll gap data are reduced gradually by 110mm.
(3), while roll gap reduces, computer is according to two side sensers actual detection data counts roll gap deviation, and computing formula is:
Roll gap deviation=transmission side physical location-fore side physical location
(4) computer carry out according to calculating roll gap deviation size and polarity the section of sentencing, and Controlling solenoid valve.When
, transmission side closed electromagnetic valve, fore side magnetic valve keeps conducting, and planisher roll gap continues to reduce.
(5) when
, fore side closed electromagnetic valve, transmission side magnetic valve keeps conducting, and planisher roll gap continues to reduce.
(6) when
, the conducting simultaneously of transmission side, fore side magnetic valve; When
, push to cylinder and switch to servo valve control.
So far, computer detects by pushing to cylinder position, adopts roll gap deviation to carry out the switching state of Controlling solenoid valve, realize both sides solenoid-driven and push to the synchronous of cylinder during solenoid control pushes to cylinder.
Before not adopting invention, when computer receives planisher roller rest, the conducting simultaneously of transmission side, fore side magnetic valve, roll is lifted, the roller rest control logic report fault when occurring that roll gap deviation exceedes allowed band (as 1.2mm), temper mill roller declines fast, and roller rest failure, causes the not smooth quality events of planisher.Using the condition of roll gap deviation as Controlling solenoid valve after carrying out an invention, follow the mechanism of " whose whose wait fast ", well realize planisher and push to cylinder both sides roll gap synchronization function.
Original solenoid-driven is pushed to the not controlled state of cylinder and is advanced through roll gap deviation Controlling solenoid valve switching state and realizes pushing to cylinder position synchronizing function by the present invention; well solve the problem that roll gap is bigger than normal; above-mentioned embodiment is only the preferred embodiment of invention; be not protection scope of the present invention, those skilled in the art can make the appropriate adjustments under the prerequisite not departing from this claims.
Claims (2)
1. a cylinder roll gap synchronization control method pushed to by planisher, it is characterized in that: mainly comprise with lower component, and frame, the topping roll moved up and down and bottom roll, fluid pressure line and safety valve, also comprise
Push to cylinder, push to cylinder and be positioned at bottom frame;
Push to cylinder position sensor, be directly connected with the piston pushing to cylinder, follow the tracks of and push to cylinder actuating length;
Servo valve, drives both sides to push to cylinder and moves, control and rolling force deviation or inclination control for planisher roll-force;
Magnetic valve, drives both sides to push to cylinder and moves, open and close control fast for temper mill roller;
Above-mentionedly push to cylinder, push to cylinder position sensor, servo valve, magnetic valve all arrange one at transmission side, fore side;
The method comprises the following steps:
(1) when planisher roll change school zero or roller rest, roll pushes to cylinder action by bottom planisher frame by solenoid-driven, simultaneous computer pushes to cylinder total kilometres and a fixed position according to when preliminary roller footpath calculates, and whole process both sides are pushed to cylinder position sensor and detected transmission side in real time and fore side pushes to cylinder stroke;
(2) computer calculates roll gap deviation according to pushing to cylinder position measurement value sensor;
(3) computer controls 2 solenoid valve conductions, cut out, as roll gap deviation >0 and
, transmission side closed electromagnetic valve, fore side magnetic valve continues conducting, and roll is lifted on continuing, and roll gap reduces, and due to transmission side closed electromagnetic valve, transmission side is pushed to cylinder and stopped action, and roll gap deviation reduces; As roll gap deviation <0 and
, fore side closed electromagnetic valve, transmission side magnetic valve continues conducting, and roll is lifted on continuing, and roll gap reduces, and due to fore side closed electromagnetic valve, fore side is pushed to cylinder and stopped action, and roll gap deviation reduces;
(4) when
, roll does not arrive fixed position, 2 magnetic valve conductings simultaneously, and roll is lifted on continuing, and roll gap reduces; When
, and roll does not arrive fixed position, performs (3);
(5) reach fixed position when roll is lifted to, planisher pushes to systematic evaluation to servo valve control, carries out remaining school idle task.
2. cylinder roll gap synchronization control method pushed to by planisher according to claim 1, it is characterized in that: the computing formula of the calculating roll gap deviation in described step (2) is: roll gap deviation=transmission side physical location-fore side physical location.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210107871.4A CN103372576B (en) | 2012-04-13 | 2012-04-13 | Temper mill push-up cylinder roll gap control device and roll gap synchronous control method |
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| CN201210107871.4A CN103372576B (en) | 2012-04-13 | 2012-04-13 | Temper mill push-up cylinder roll gap control device and roll gap synchronous control method |
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| CN103372576A CN103372576A (en) | 2013-10-30 |
| CN103372576B true CN103372576B (en) | 2015-06-24 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103949482B (en) * | 2014-04-18 | 2017-01-04 | 南京梅山冶金发展有限公司 | A kind of planisher roller balance control method |
| CN104307889B (en) * | 2014-11-03 | 2017-04-26 | 攀钢集团攀枝花钢钒有限公司 | Light finishing machine control method |
| CN106623444B (en) * | 2017-02-16 | 2018-04-03 | 中冶华天工程技术有限公司 | A kind of mill roll-gap Controlling model based on AMESim |
| CN106881358A (en) * | 2017-03-22 | 2017-06-23 | 中冶华天工程技术有限公司 | Mill roll-gap measures control method |
| CN108787760B (en) * | 2017-04-28 | 2019-09-17 | 上海宝信软件股份有限公司 | A kind of planisher gap preset device and control method based on four servo valves |
| CN111872133B (en) * | 2020-08-03 | 2022-03-15 | 华峰铝业有限公司 | Metal composite material bonding rolling method for improving defects of air bubbles and leather material deviation |
| CN112658063B (en) * | 2020-11-19 | 2023-02-03 | 首钢京唐钢铁联合有限责任公司 | Installation accuracy control method for roller box supporting roller of straightening machine |
| CN112642861B (en) * | 2020-12-30 | 2024-02-09 | 宝信软件(安徽)股份有限公司 | Control method for roll gap position and upper roll balance of roll system |
| CN114147073B (en) * | 2021-11-03 | 2024-02-02 | 天津市新宇彩板有限公司 | Zero calibration control method and system for oil pressure sensor |
| CN116586434B (en) * | 2023-07-19 | 2023-09-08 | 邢台纳科诺尔精轧科技股份有限公司 | Roll gap adjusting device and method for battery pole piece rolling mill |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3693385A (en) * | 1969-09-29 | 1972-09-26 | Ube Industries | Fluid control system for selectively self-adjusting mill reduction force or interworking roll distance |
| JPS5614019A (en) * | 1979-07-13 | 1981-02-10 | Hitachi Ltd | Rolling mill |
| US4485649A (en) * | 1981-10-16 | 1984-12-04 | Davy Mckee (Sheffield) Limited | Rolling mill control system |
| CN201067761Y (en) * | 2007-08-01 | 2008-06-04 | 许晓明 | Refined temper mill |
| CN201342426Y (en) * | 2008-12-18 | 2009-11-11 | 鞍钢集团自动化公司 | TDC hot rolling skin pass mill control system |
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