CN102298351B - Method for improving tracking accuracy of strip steel - Google Patents
Method for improving tracking accuracy of strip steel Download PDFInfo
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- CN102298351B CN102298351B CN2010102092495A CN201010209249A CN102298351B CN 102298351 B CN102298351 B CN 102298351B CN 2010102092495 A CN2010102092495 A CN 2010102092495A CN 201010209249 A CN201010209249 A CN 201010209249A CN 102298351 B CN102298351 B CN 102298351B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 87
- 239000010959 steel Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003466 welding Methods 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims abstract description 9
- 238000013500 data storage Methods 0.000 claims abstract description 8
- 238000005192 partition Methods 0.000 claims abstract description 8
- 238000012937 correction Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000012217 deletion Methods 0.000 claims description 2
- 230000037430 deletion Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 8
- 230000006870 function Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 238000005498 polishing Methods 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Abstract
The invention provides a method for improving the tracking accuracy of strip steel, which utilizes an Alston programmable logic controller to compile and modify the related programs of each PLC, increases the detection means and the communication interface, improves the system and the partition structure, develops the functions of the system and each component element, improves the data detection and storage accuracy of the outlet finished product coil through the effective communication and the connection of the material tracking system and the related systems, and avoids the loss of the data of the steel coil; the precision of an on-line tracking system is improved, and the correction speed of the position of the processed welding seam is doubled; optimizing a system architecture, shortening the processing time to 500ms, and reducing the error value of the welding seam by five times through program calculation; the quantity and the quality of online strip steel data storage are improved, double-hole detection alarm and real-time display are realized, the egg roll feeding is automatically judged, waste loss is reduced, and the yield of products is improved.
Description
Technical field
The invention belongs to automation field, relate in particular to a kind of method that improves cold rolled continuous annealing unit band steel tracking precision.
Background technology
Materiel tracking system is to be used for position while welding on-line monitoring, technological parameter to adjust and detect the system that preserves the finished product related data automatically.What the materiel tracking system of certain cold rolling mill continuous annealing unit adopted is the programmable logic control system (being PLC) of being produced by U.S. Alstom; The producer that adopts this system both at home and abroad is mostly with the continuous zinc coating unit of this system applies in low speed; Because unit speed is low; Tracking accuracy is less demanding, therefore still can adapt to.Still genus is the first and certain cold rolling mill is used on continuous annealing production line at a high speed.
This materiel tracking system can't adapt to the requirement of the highest 820m/min travelling speed of continuous annealing unit band steel owing to the tracking accuracy reason, causes track and localization inaccurate, and can't shield a steel plate leakage eye defective, and it is inaccurate to cause weld seam to demarcate.Simultaneously, the accuracy of logic when this materiel tracking system also can't be realized high-speed cruising has leakage at the moment can't realize automatic shearing near band steel weld seam, and causes and rein in roller when subtracting roll-force when being with the steel polishing to cross weld seam; When producing rouleau, the volume data are prone to lose on the outlet step rate; When the tracker fault, data are not stored and are caused the finished product loss of data on the production line, thereby have a strong impact on the precision of materiel tracking system, directly cause the decline of finished product lumber recovery.
Summary of the invention
The object of the invention aims to provide a kind of simple, and is effective, is convenient to operation, can reduce the tracker measuring error, remedies the tracker bugs, improves the method for band steel tracking precision.
For this reason, the technical solution that the present invention taked is:
A kind of method that improves band steel tracking precision comprises programmable logic controller, and its concrete steps and method are:
1, improve outlet finished product volume Data Detection and storage accuracy:
Establishment outlet step rate mobile process increases virtual coil of strip data storage area in tracking PLC;
On the coil of strip transport vehicle, optical grating detecting instrument is set, detects coil of strip physical location and temporary;
Coil of strip optical grating detecting instrument position and angle on the adjustment outlet step rate make and detect grating 20mm above ground level, and grating irradiating angle and coil of strip axis are 35 °～55 ° angles;
2, improve the on-line tracing system accuracy:
In tracking PLC, increase the digital quantity output template, revise hole appearance communication interface and the mode of seeking, after tracking PLC digital quantity output template receives and seeks hole appearance welding hole detection signal, directly send the flying shear that exports PLC to and shear program through rigid line;
3, optimize the trace routine system architecture:
The change tape steel is followed the tracks of partition table, and according to band steel actual motion route, tension variation, velocity variations and subarea number change factor, the correlator section length that revision band steel is followed the tracks of is utilized the online position while welding error that hole appearance correction band steel is followed the tracks of of seeking;
4, carry out in tape steel data storage:
In the online position while welding calculation procedure of tracking PLC, be increased in tape steel position while welding and reach coil of strip position synchronous program synchronously, and be stored in tracking PLC in tape steel position while welding calculates the data field of stand-by program;
In the tracking PLC communication program, increase, utilize EPA that data communication is passed to the second computer communication system to be the message communication of main contents in tape steel real data;
In the online position while welding calculating of tracking PLC stand-by program, be increased in tape steel position while welding and coil of strip location restore program; The band steel physical location of the time band steel location storage district record that accident occurs is passed to the operation screen of production and the online position while welding calculation procedure of tracking PLC, guarantee the band steel position that picture shows and make tracking PLC that weld seam and coil of strip process data can keep and be accurate in the state of accident;
5, realize the diplopore detection alarm:
Increase near the diplopore detection alarm program band steel weld seam, utilize and seek the hole appearance and judge that near the weld seam other leak eye or holes, and carry out information display alarm at man-machine picture;
6, judge " following egg roll " automatically:
Outlet PLC finished product volume shearing program goes out coil of strip weight and sends to tracking PLC according to length, width, thickness and the density calculation of strip coiling; The tracking PLC determining program will be sheared the back actual weight automatically less than i.e. " following egg roll " information deletion of 1 ton coil of strip, and issue operation screen through Ethernet;
7, be with steel welding back position probing:
Band steel ruuning situation judged that being with steel position and running route, the information that tracking PLC transmits according to welding machine PLC to carry out weld seam calculates after welding machine PLC accomplished according to welding, and passed to production operation system and secondary information system through Ethernet.
Beneficial effect of the present invention is:
Outlet finished product volume Data Detection and storage accuracy have been improved, the coil of strip loss of data phenomenon of avoiding when manually moving coil of strip misoperation or coil of strip detection stop position and angle just causing; Improved the precision of on-line tracing system; Make the speed of tracking PLC processing welding lines position correction bring up to 500ms by 1s; Tracking accuracy is brought up to 10m by 30～50m; Avoid because of communication between outlet PLC and the tracking PLC too much cause overtime fault cause position while welding can't proofread and correct or correction time late excessively, make position while welding inaccurate, influence exports the shear precision of coil of strip.Optimized the system architecture of trace routine, improved the speed of band steel tracking PLC processing partition running program, made the processing time shorten to 500ms by original 800ms, program is calculated the error amount of weld seam deviation and is brought up to 10m by 50m.Improved quality and quantity, can organize production immediately after making accident treatment, improved the lumber recovery of product in tape steel data storage.Improved system's detection alarm ability, realized the diplopore detection alarm and shown in real time.Can judge " following egg roll " automatically, avoid rolling up heavy not enough problem, and in time searching and elimination causes the reason of " following egg roll " that foundation is provided.
Embodiment
The present invention mainly is actual according to produced on-site; Work out and revise each PLC relative program; Increase detection means and communication interface, improvement system and partitioned organization, increase and development system and each element function; Effective communication through materiel tracking system and related system and getting in touch realizes improving the target of band steel tracking precision.Its concrete grammar and operation steps are:
1, improve outlet finished product volume Data Detection and storage accuracy:
The step rate mobile process of in tracking PLC, increasing export; And in outlet step rate mobile process, work out virtual coil of strip data storage area; Be used for being stored in the data of the coil of strip of coil of strip transport vehicle when step rate rewinds, avoid causing the volume loss of data because of producing misoperation when manually moving coil of strip.
On the coil of strip transport vehicle, optical grating detecting instrument is set, detection coil of strip physical location places the memory block temporary the little car data of coil of strip, after moving the whole completion of volume operation, accomplishes the transmission of coil of strip data again.
Coil of strip optical grating detecting instrument position and angle on the adjustment outlet step rate; Detection grating height is reduced to by former 80mm above ground level exceeds 20mm; Simultaneously the grating irradiating angle is 35 °～55 ° angles by original changing into the coil of strip axis with the coil of strip axis normal, promptly is in coil of strip clinodiagonal direction.Lick for a short time thereby eliminated invar, grating is broken forth from the coil of strip intermediate hollow, detects less than the band steel, and thinking does not have the band steel and cause the phenomenon of coil of strip loss of data.
2, improve the on-line tracing system accuracy:
In tracking PLC, increase the digital quantity output template; Hole appearance communication interface and mode are sought in modification; Former cause outlet PLC receive the back through the global variable communication pass to tracking PLC seek the hole appearance detect the welding hole signal change by tracking PLC digital quantity output template receive seek hole appearance welding hole detection signal after; Directly send the flying shear shearing program of outlet PLC to, improve the speed of tracking PLC processing welding lines position correction through rigid line.
3, optimize the trace routine system architecture:
The change tape steel is followed the tracks of partition table; Tracing area is divided into 204 sub-areas by 219 reductions; And according to band steel actual motion route, tension variation, velocity variations and subarea number change factor; The correlator section length that revision band steel is followed the tracks of is utilized the online position while welding error that hole appearance correction band steel is followed the tracks of of seeking.
So-called band steel actual motion route is: the band steel completely will be through two the 1000 meters kinks with 500 meters, one 300 meters cleaning zone, regional and one 1000 meters the stove district of one 50 meters polishing.
So-called strip tension changes, and mainly be to consider to have 7 cover jockey pulleys, and the tension force of band steel is different between each jockey pulley.For example, become cleaning section tension force a 0～20kN at 1# jockey pulley place by uncoiling tension 0～30kN; Strip tension becomes entry loop tension force 0～30kN by cleaning section tension force 0～20kN at 2# jockey pulley place; Become stove district tension force 0～20kN etc. at 3# jockey pulley place by entry loop tension force 0～30kN, when confirming the subarea, must take into full account the difference that strip tension changes.
So-called strip speed changes, and mainly is consideration strip speed in entry loop is adjusted to the stove district by inlet velocity 0～800m/min speed 0～450m/min; In the outlet kink, be adjusted to the speed 0～800m/min of polishing by the speed 0～450m/min in stove district; Speed 0～800m/min by polishing in the inspection kink is adjusted to the speed 0～800m/min that batches.
The present invention changes according to band steel number of partitions, has reduced the quantity in the subarea of no purposes, has improved the speed of band steel tracking PLC processing partition running program, makes the processing time shorten to 500ms by original 800ms.Simultaneously, change according to band steel partition length again, the subarea length that the change tape steel is followed the tracks of is sought 1# in the entry loop length in the subarea at appearance place, hole and is brought up to 66.41 meters by original 16.46 meters; The subarea length of seeking the 2# of outlet in the kink appearance place, hole is brought up to 75.76 meters by original 20.91 meters; The subarea length that 3# seeks hole appearance place is brought up to 78.91 meters by original 25.36 meters; The subarea length of seeking the 4# of inspection in the kink appearance place, hole is brought up to 85.01 meters by original 30.38 meters; The subarea length of seeking the 5# at 7# jockey pulley place hole appearance place is brought up to 54.81 meters by original 1.77 meters.Owing to the position while welding correction program of tracking PLC is passed through the modification of above-mentioned five parts, makes the error amount of program when calculating weld seam deviation bring up to 10m by 50m.
4, carry out in tape steel data storage:
In the online position while welding calculation procedure of tracking PLC, be increased in tape steel position while welding and reach coil of strip position synchronous program synchronously; Per second is recorded in tape steel position while welding and coil of strip position, and is stored in tracking PLC in tape steel position while welding calculates the data field of stand-by program.
In the tracking PLC communication program, increase the 5100# communication; The main contents of communication are the data at the tape steel; The reel number, length, width, the thickness that comprise coil of strip; Whether need carry out light positive and handle, whether need oil surface processing and coil of strip weld seam present range scissors how far to wait information, utilize the every 5s of EPA that data communication is passed to the second computer communication system then.
In the online position while welding calculating of tracking PLC stand-by program, be increased in tape steel position while welding and coil of strip location restore program; During to the accident of the online position while welding calculating stand-by program of track PLC be with steel location storage district at tape steel actual welds position and coil of strip location records causing when stopping because of field accident; The band steel physical location of time band steel location storage district record is passed to the operation screen of production and the online position while welding calculation procedure of tracking PLC with accident after accident treatment finishes; Guarantee that the band steel position in the online position while welding calculation procedure of band steel position that picture shows and tracking PLC is accurate, can organize production immediately after making accident treatment.
5, realize the diplopore detection alarm:
Increase near the diplopore detection alarm program band steel weld seam, utilize and seek the hole appearance and judge that near the weld seam other leak eye or holes, and carry out information display alarm at man-machine picture.Main method is:
Utilize the code-disc of 1# idler roller, when seeking the hole appearance and find first hole, trigger the diplopore length computation program of tracking PLC diplopore detection alarm program; When seeking the hole appearance and find next hole; The length that record calculates, and with 90 meters compare, if length is less than 90; Then trigger diplopore and report to the police, warning is passed to the picture of production monitoring.When this length computation; Because the highest 800m/min of speed theory calculates when dashing cover by inlet, seek Kong Shihui of the every discovery of hole appearance pulse signal that to produce a retention time be 3.8s (signal retention time be 3.8 seconds be to be used for guaranteeing to seek the hole appearance to have found a hole really).Through calculating: 800/60 * 3.8=50 (m), when distance is less than 50 meters between two holes, when dashing cover with 800m/min; Only can generate a time greater than 3.8 seconds long pulse signal, can not trigger the diplopore length computation program of tracking PLC diplopore detection alarm program, so the duration of the pulse signal of seeking Kong Yi that inspection simultaneously produces on the basis of computational length; If greater than 3.8 seconds; Then also think diplopore, then trigger diplopore and report to the police, warning is passed to the picture of production monitoring.
Simultaneously, 5# seeks hole Yi Chu in outlet, utilizes 7# idler roller code-disc; When seeking the hole appearance and find first hole, trigger the diplopore length computation program of tracking PLC diplopore detection alarm program, when seeking the hole appearance and find next hole; Write down the length of calculating, and compare, if length is less than 90m with 90m; Then trigger diplopore and report to the police, warning is passed to the picture of production monitoring.
6, judge " following egg roll " automatically:
So-called " following egg roll " is meant because of strip surface quality or other reason and causes the actual weight of this winding steel after shearing less than 1 ton coil of strip.For this reason, in the finished product volume shearing program of outlet PLC, through length and thickness and the width and the density of strip coiling; Just can calculate the weight of coil of strip, when this total amount less than a ton hour, " the following egg roll " that this information is sent to tracking PLC through the global variable communication between outlet PLC and the tracking PLC be determining program automatically; Determining program will be other information of this volume (like reel number automatically for " the following egg roll " of tracking PLC; Length, weight, width; Information such as thickness) in finished product volume information storehouse, delete, and issue the production operation picture to this volume for the information of " following egg roll " through the mode of ethernet communication.
7, be with steel welding back position probing:
Band steel ruuning situation judged that being with steel position and running route, the information that tracking PLC transmits according to welding machine PLC to carry out weld seam calculates after welding machine PLC accomplished according to welding, and passed to production operation system and secondary information system through Ethernet.
For cold rolling mill with two uncoilers,, the band steel claim to be with steel when moving on the 1# uncoiler at on-line running, and, the band steel claim to be with steel when moving on the 2# uncoiler in the operation of rolling off the production line.
Behind inlet production exercise workmanship weld seam; Welding machine PLC through the field bus communication mode welding accomplish signal issue inlet PLC on the working procedure that rolls off the production line; Inlet PLC takies grating through the coil of strip on the uncoiler; The band signal of steel on the 1# uncoiler still is the 2# uncoiler pass to inlet PLC on roll off the production line in the working procedure; Inlet PLC the band steel the 1# uncoiler still is information such as signal has been accomplished in 2# uncoiler signal, welding, the run signal of produce selecting to reach the standard grade or to roll off the production line pass to through the global variable communication tracking PLC on the operation determining program that rolls off the production line, through several information that inlet PLC gives, judge that the band steel reaching the standard grade or rolling off the production line operation.At on-line running, just issue the coil of strip information on reaching the standard grade the online position while welding calculation procedure of tracking PLC, be used for carrying out the calculating of online weld seam; Simultaneously the relevant information of band steel, like the color that the band steel shows on picture, reel number at on-line running; Width, thickness, whether oiling; Information such as polishing is passed to production operation system and secondary information system through the mode of Ethernet.
Claims (2)
1. one kind is improved the method for being with the steel tracking precision, comprises that programmable logic controller is PLC, is characterized in that:
(1), improve outlet finished product volume Data Detection and storage accuracy:
Establishment outlet step rate mobile process increases virtual coil of strip data storage area in tracking PLC;
On the coil of strip transport vehicle, optical grating detecting instrument is set, detects coil of strip physical location and temporary;
Coil of strip optical grating detecting instrument position and angle on the adjustment outlet step rate;
(2), improve the on-line tracing system accuracy:
In tracking PLC, increase the digital quantity output template, revise hole appearance communication interface and the mode of seeking, after tracking PLC digital quantity output template receives and seeks hole appearance welding hole detection signal, directly send the flying shear that exports PLC to and shear program through rigid line;
(3), optimize the trace routine system architecture:
The change tape steel is followed the tracks of partition table, and according to band steel actual motion route, tension variation, velocity variations and subarea number change factor, the correlator section length that revision band steel is followed the tracks of is utilized the online position while welding error that hole appearance correction band steel is followed the tracks of of seeking;
(4), carry out in tape steel data storage:
In the online position while welding calculation procedure of tracking PLC, be increased in tape steel position while welding and reach coil of strip position synchronous program synchronously, and be stored in tracking PLC in tape steel position while welding calculates the data field of stand-by program;
In the tracking PLC communication program, increase, utilize EPA that data communication is passed to the second computer communication system to be the message communication of main contents in tape steel real data;
Calculate in the stand-by program at the online position while welding of tracking PLC and to be increased in tape steel position while welding and coil of strip location restore program, the band steel physical location of band steel location storage district record is passed to the operation screen of production and the online position while welding calculation procedure of tracking PLC when accident occurring;
(5), realize the diplopore detection alarm:
Increase near the diplopore detection alarm program band steel weld seam, utilize and seek the hole appearance and judge that near the weld seam other leak eye or holes, and carry out information display alarm at man-machine picture;
(6), judge " following egg roll " automatically:
Outlet PLC finished product volume shearing program goes out coil of strip weight and sends to tracking PLC according to length, width, thickness and the density calculation of strip coiling; The tracking PLC determining program will be sheared the back actual weight automatically less than i.e. " following egg roll " information deletion of 1 ton coil of strip, and be this volume that the information of " following egg roll " is issued operation screen through Ethernet;
(7), be with steel welding back position probing:
Band steel ruuning situation judged that being with steel position and running route, the information that tracking PLC transmits according to welding machine PLC to carry out weld seam calculates after welding machine PLC accomplished according to welding, and passed to production operation system and secondary information system through Ethernet.
2. the method for raising band steel tracking precision according to claim 1 is characterized in that the position of coil of strip optical grating detecting instrument is 20mm above ground level on the said outlet step rate, and grating irradiating angle and coil of strip axis are 35 °～55 ° angles.
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| CN102632092B (en) * | 2012-04-24 | 2013-12-04 | 中冶连铸技术工程股份有限公司 | Processing line welding seam tracking method and device |
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| CN105251776B (en) * | 2014-07-16 | 2017-05-24 | 鞍钢股份有限公司 | Cold continuous rolling mill strip steel tracking processing method |
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