CN103341499B - Device for tracing and detecting interior plate blank head position of fixed width machine - Google Patents
Device for tracing and detecting interior plate blank head position of fixed width machine Download PDFInfo
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- CN103341499B CN103341499B CN201310234628.3A CN201310234628A CN103341499B CN 103341499 B CN103341499 B CN 103341499B CN 201310234628 A CN201310234628 A CN 201310234628A CN 103341499 B CN103341499 B CN 103341499B
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Abstract
The invention provides a device for tracing and detecting an interior plate blank head position of a fixed width machine. The device for tracing and detecting the interior the plate blank head position of the fixed width machine comprises a fixed width machine control PLC and a fixed width machine first-level control system connected with the fixed width machine control PLC; the input end of the fixed width machine control PLC is connected with a main transmission motor current signal, a pressing die size, and an inlet pinch roller pressure signal. The fixed width machine control PLC comprises a filtering module, a counting module, a plate blank head position calculating module and a communication module; filter shaping is conducted on the main transmission motor signal by the filtering module; the number of impulses of the main transmission motor current signal is accumulated by the counting module; the plate blank head position is calculated by the plate blank head position counting module, and the calculation formula is a plate blank head position value=28.96m+the number of the impulses of the main transmission motor current signal*the pressing die size; the plate blank head position value is transmitted to the fixed width machine first-level control system in real time by the communication module; the filtering module judges monitored currents, and the impulses are effective when the currents are larger than or equal to 4000A every time.
Description
Technical field
The present invention relates to the device of a kind of constant width machine inner slab head position tracing detection, belong to electric basic automatization control field, directly apply to hot rolling constant width machine forcing press (hereinafter referred to as constant width machine) and control.
Background technology
After on Hot Line, constant width machine is positioned at roughing descaler, before other milling train, for carrying out the side pressure of continuous print width to slab total length.Therefore, slab must be accurately at the tracing positional of constant width machine.If slab head position is followed the tracks of inaccurate, constant width machine side pressure pressure gap preset, guide roller and pinch roll gap preset can be affected.Directly cause outlet slab width control system precise decreasing, time serious, also there will be pinch roll and guide roller device damage.
Solve this problem and have two schemes: 1, in existing system, detected by a kind of other method and calculate slab head position and follow the tracks of, the method affects less by external equipment situation.As the wearing and tearing of entrance pinch roll roller footpath, slab skidding etc. all can cause error.2, the checkout gear followed the tracks of slab position is increased.As laser velocimeter, directly measure real-time speed and the position of slab.The program can more perfectly be dealt with problems, but, need to increase external equipment, and it is more by site environment restriction, as the selection of installation site, the size weight maintenance repair of checkout gear is safeguarded etc., and will carry out larger transformation to existing electromechanical equipment, and therefore the method cannot realize in a short time.
In constant width machine controls, wherein the head position of slab is followed the tracks of and accurately, otherwise must easily be occurred width of plate slab abnormal failure, badly damaged equipment.In former design, in constant width machine, the computational methods of slab head position are: when slab head nips constant width machine entrance pinch roll, the encoder of pinch roll motor can detect the speed of pinch roll in real time, at this moment carries out integral operation to its speed, can obtain the positional value of slab head tracking.Usually, the slab head position value of the method calculating is very accurate.But when occurring the footpath inordinate wear of pinch roll roller, or slab plate shape is bad, when occurring skidding, the slab head position value that the method calculates, much larger than the physical location of slab head, causes producing extremely.
Summary of the invention
The object of the invention is to solve the problem, the device of a kind of wide machine inner slab head position tracing detection is provided, adopt brand-new detection computations method, overcome the limitation of former method, realize the detection by the pulse change to constant width machine main driving motor electric current, draw and effectively pat number of times, pat the step distance after number of times is multiplied by beating, the tracing positional of slab head in constant width machine can be calculated.
Technical scheme of the present invention: the device of constant width machine of the present invention inner slab head position tracing detection comprises constant width machine control PLC, the constant width machine first class control system be connected with constant width machine control PLC, the input of constant width machine control PLC connects main driving motor current signal, die size, entrance pinch roll pressure signal; Constant width machine control PLC comprises filtration module, counting module, slab head position computing module, communication module; Filtration module: to main driving motor current signal filter shape; Counting module: the pulse number of accumulative main driving motor current signal; Slab head position computing module: calculate slab head position, computing formula is: slab head position value=28.96 meter+main driving motor current impulse number × die size; Slab head position value is sent to constant width machine first class control system by communication module in real time.
The electric current of described filtration module to monitoring judges, be more than or equal to 4000A is that pulse is effective at every turn.
Advantage of the present invention:
1) entrance pinch roll roller footpath inordinate wear: the very large error of calculation appears in former method, cause slab head position to be followed the tracks of inaccurate, it is excessive that slab head subtracts wide amount; The present invention also there will be error, but not quite, on slab head subtract wide have impact in allowed band.
2) when incoming slab template is bad, easily there is fault of sealing up a door in former method, slab breaks equipment, manually must return steel; Slab of the present invention rolling time in constant width machine increases, but can normally produce.
3) incoming slab subtract wide amount large time, former method easily occur skid, cause slab head position follow the tracks of calculating there is error, width of plate slab control accuracy decline; The present invention skids impact not quite, still can use.
In a word, new method contrast aging method, solves slab and to skid the head position error of calculation brought.And this method easily realizes, do not need used device transformation, utilize existing electromechanical equipment, increase control algolithm and just can realize.
After coming into operation, the fault statistics of constant width machine and width accuracy: not only obviously decline fault time, and also width control system precision also improves.
Accompanying drawing explanation
Fig. 1 is constant width machine side pressure pressing mold and slab motion (overlooking) schematic diagram.
Fig. 2 is constant width machine device location value (side-looking) schematic diagram.
Fig. 3 is hardware principle block diagram of the present invention.
Fig. 4 is software principle block diagram of the present invention.
Fig. 5 is slab rolling flow chart in constant width machine.
Detailed description of the invention
Fig. 1 is constant width machine side pressure pressing mold and slab motion (overlooking) schematic diagram.
In figure: the side pressure pressing mold 2 of constant width machine, slab 1.
Step 1) slab enters constant width machine original position;
Step 2) slab to move ahead a die size 400mm, stops;
Step 3) main driving motor rotates to 360 degree or 0 degree by 180 degree, and a slab 1 patted by pressing mold 2;
After step 4) has been patted, (main driving motor rotates to 180 degree by 360 degree (0 degree) again, and pressing mold is regained.
Enter the beating of next cycle, middle rectangle represents incoming slab 1, and its arrow represents that slab stepping moves ahead; The trapezoidal expression pressing mold 2 in both sides, its arrow represents its flap-wise, moves back and forth; The mechanical device that upper and lower ellipse representation main driving motor drives, rotary motion.
The effective wide 400mm of side pressure pressing mold 2 of constant width machine, slab 1 moves ahead 400mm, and stop, then main driving motor rotates to 360 degree or 0 degree by 180 degree, and pressing mold is patted once, and after having patted, main driving motor rotates to 180 degree by 360 degree (0 degree) again, pressing mold withdrawal.Enter the beating of next cycle.
Fig. 3 is hardware principle block diagram of the present invention, Fig. 4 is software principle block diagram of the present invention: the device of constant width machine of the present invention inner slab head position tracing detection comprises constant width machine control PLC, the constant width machine first class control system be connected with constant width machine control PLC, the input of constant width machine control PLC connects main driving motor current signal, die size, entrance pinch roll pressure signal; Constant width machine control PLC comprises filtration module, counting module, slab head position computing module, communication module; Filtration module: to main driving motor current signal filter shape; Counting module: the pulse number of accumulative main driving motor current signal; Slab head position computing module: calculate slab head position, computing formula is: slab head position value=28.96 meter+main driving motor current impulse number × die size; Slab head position value is sent to constant width machine first class control system by communication module in real time.
Fig. 2 is constant width machine device location value (side-looking) schematic diagram.
Slab enters constant width machine arrival and subtracts wide side pressure pressing mold place, and due to die size 400mm, slab moves ahead after 400mm, stops.Side pressure pressing mold is once patted, after side pressure side pressure mould is regained.Slab continues the 400mm that moves ahead, and enters next sampling action.
Fig. 2 provides the positional value of the several visual plant of constant width machine.Represent the distance of this equipment and roughing rolling line entrance respectively.27.01 meters, constant width machine entrance pinch roll 3 position, outlet 30.91 meters, pinch roll 4 position and 28.96 meters, constant width machine side pressure pressing mold 2 position.Before slab head arrives side pressure pressing mold, slab only does forward movement, does not start to carry out side pressure and subtracts wide, only has when slab head arrives side pressure pressing mold 28.96 meters, namely start the side compression type driven by main driving motor and subtract wide motion, until slab leaves constant width machine completely.Therefore computing formula is as follows:
Number of times × 0.4 meter is patted in slab head position value=28.96 meter+stepping;
Fig. 5 is slab rolling flow chart in constant width machine:
It is no that the present invention arrives initial position by entrance pinch roll pressure signal determination slab, can the size of current of Real-Time Monitoring constant width machine main driving motor by current transformer, when each pressing mold is patted, the electric current of monitoring just has a pulsed saltus step, be more than or equal to 4000A(empirical statistics value at every turn) namely record pulsatile once, the current impulse of monitoring adds up by constant width machine control PLC, and the distance simultaneously number of times of this impulse hits being multiplied by each slab stepping can obtain slab head in real time and to move ahead value.When the electric current of monitoring is less than position that 4000A can think that this side pressure pressing mold pats and to pat position last time identical, namely there is stagnation of skidding in slab, do not have normal forward.
Table 1: stepping number of times and slab head position corresponding relation
Incoming slab enters constant width machine entrance pinch roll, under it drives, arrive side pressure pressing mold, starts stepping and subtracts wide motion.Stop after slab advance 400mm, side pressure pressing mold is patted once, and pressing mold is regained, and can to complete subtracting of whole slab wide for this process repeatedly.When slab and entrance pinch roll skid, actual slab position does not change, but entrance pinch roll is still in rotation.
Therefore, in former method, computing formula:
, n entrance pinch roll motor actual speed; R entrance pinch roll radius; T is the time that entrance pinch roll stings steel.
Former method rely on entrance pinch roll speed to carry out slab head position value that integral operation obtains will 400mm more about than slab actual head position value, if continue to occur skidding, so this error will continue to become greatly, until cause constant width machine fault.
Computing formula of the present invention: slab head position value=28.96 meter+main transmission current impulse number of times × 0.4 meter.
In the present invention, skid in the event of slab and entrance pinch roll, the position that so this side pressure pressing mold is patted will overlap with the position that last time, pressing mold was patted, because slab has been clapped narrow by beating last time, when this is patted, do not have very large load, the main driving motor electric current driving side pressure pressing mold to pat will not have impulse hits, therefore can by counting main driving motor current impulse number, calculate slab head position value, the slab head position value obtained like this can not be subject to slab and to skid the impact brought, ensure that the accuracy of slab head position value.
Core of the present invention is the head position pursuit gain being calculated slab by the curent change of constant width machine main driving motor, reduce the dependence to constant width machine entrance pinch roll, when entrance pinch roll and slab occur skidding or occur to wear and tear in its roller footpath, do not affect detection and the calculating of slab head position tracking.Therefore, every curent change by constant width machine main driving motor calculates the head position pursuit gain of slab, all belongs to protection scope of the present invention.
Claims (2)
1. the device of a constant width machine inner slab head position tracing detection, comprise constant width machine control PLC, the constant width machine first class control system be connected with constant width machine control PLC, is characterized in that: the input of constant width machine control PLC connects main driving motor current signal, die size, entrance pinch roll pressure signal; Constant width machine control PLC comprises filtration module, counting module, slab head position computing module, communication module; Filtration module: to main driving motor current signal filter shape; Counting module: the pulse number of accumulative main driving motor current signal; Slab head position computing module: calculate slab head position, computing formula is: slab head position value=28.96 meter+main driving motor current impulse number × die size; Slab head position value is sent to constant width machine first class control system by communication module in real time.
2. the device of constant width machine according to claim 1 inner slab head position tracing detection, is characterized in that: the electric current of filtration module to monitoring judges, be more than or equal to 4000A is that pulse is effective at every turn.
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| CN201310234628.3A CN103341499B (en) | 2013-06-14 | 2013-06-14 | Device for tracing and detecting interior plate blank head position of fixed width machine |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104772344B (en) * | 2014-01-10 | 2016-10-05 | 宝山钢铁股份有限公司 | Hot rolling synchronous mode heavy side press tracking |
| CN104001729B (en) * | 2014-04-02 | 2016-05-25 | 首钢京唐钢铁联合有限责任公司 | A kind of apparatus for establishing and method of constant width machine pinch roll slab tracking |
| CN107020300B (en) * | 2016-01-29 | 2019-03-29 | 宝山钢铁股份有限公司 | A kind of complex correction device and complex correction method improving coiling machine tracking accuracy |
| CN107020309B (en) * | 2016-01-29 | 2019-03-29 | 宝山钢铁股份有限公司 | A kind of means for correcting of coiler pinch-roll tracking accuracy and bearing calibration |
| CN107608400A (en) * | 2017-08-30 | 2018-01-19 | 滁州市西控电子有限公司 | A kind of mine saves drainage control system |
| CN108817098B (en) * | 2018-04-26 | 2020-02-21 | 首钢京唐钢铁联合有限责任公司 | Hot rolling process control method and device |
| CN110508626B (en) * | 2019-07-23 | 2021-07-27 | 北京首钢股份有限公司 | Side press plate blank extrusion control method |
| CN111618096A (en) * | 2020-04-29 | 2020-09-04 | 河钢乐亭钢铁有限公司 | Method for calculating tracking control of head of hot rolling coiler |
| CN113877968B (en) * | 2020-07-01 | 2023-12-12 | 宝山钢铁股份有限公司 | Method for preventing slipping of width-fixing machine |
| CN111872135A (en) * | 2020-08-05 | 2020-11-03 | 攀钢集团西昌钢钒有限公司 | Fixed width press and rolling control method thereof |
| CN115446126B (en) * | 2022-08-31 | 2024-02-13 | 鞍钢股份有限公司 | Steel biting and throwing method for hot rolling fixed-width press |
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| KR20000042886A (en) * | 1998-12-28 | 2000-07-15 | 이구택 | Control method at generation of abnormality in sensor for controlling cold rolling process |
| JP2004135477A (en) * | 2002-10-15 | 2004-04-30 | Jfe Steel Kk | Synchronous motor operating and controlling method |
| JP3930846B2 (en) * | 2003-10-17 | 2007-06-13 | 新日本製鐵株式会社 | Sheet shape control method and sheet rolling machine |
| CN101920270B (en) * | 2009-06-12 | 2012-07-04 | 宝山钢铁股份有限公司 | Device and method for detecting and controlling tilting buckle head of band steel in rough rolling process |
| CN101722196B (en) * | 2009-11-10 | 2011-10-26 | 武汉钢铁(集团)公司 | Method for calculating and locating strip steel head of automatic stepping system of hot continuous rolling coiling machine |
| JP5838765B2 (en) * | 2011-11-29 | 2016-01-06 | Ｊｆｅスチール株式会社 | Rolled material conveying method and rolling apparatus |
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Effective date of registration: 20170718 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
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Granted publication date: 20150121 Termination date: 20200614 |