CN103962414A - Coiler wrapper roller ladder-speed control method and control system thereof - Google Patents
Coiler wrapper roller ladder-speed control method and control system thereof Download PDFInfo
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- CN103962414A CN103962414A CN201310030645.5A CN201310030645A CN103962414A CN 103962414 A CN103962414 A CN 103962414A CN 201310030645 A CN201310030645 A CN 201310030645A CN 103962414 A CN103962414 A CN 103962414A
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Abstract
The invention provides a coiler wrapper roller ladder-speed control method and a control system thereof, and relates to special control equipment or a method for metal rolling machines or processing products thereof so as to real-timely achieve the hardness, the thickness and the coiling temperature of a strip steel. According to the present invention, the speed advancing rate adjustment parameter is determined according to the following judgment conditions that: (1) the speed advancing rate adjustment parameter is increased if the hardness of a strip steel is increased, (2) the speed advancing rate adjustment parameter is increased if the thickness of a strip steel is increased, and (3) the speed advancing rate adjustment parameter is decreased if the temperature of a strip steel is increased; and according to the speed advancing rate adjustment parameter, the advancing rates of the first wrapper roller, the second wrapper roller and the third wrapper roller are calculated, and the speeds of the first wrapper roller, the second wrapper roller and the third wrapper roller are controlled according to the advancing rates of various wrapper rollers to form the stably and progressively increased ladder speed so as to reduce the problems of inner ring bruise defects and pulling of the strip steel width into the narrow state of the hot-rolled steel coil, increase the control precision of the coiler, reduce the strip steel coiling defect, and increase the steel rolling product quality.
Description
Technical field
The present invention relates to be specially adapted for control appliance or the method for rolling mill for metal or its converted products, relate in particular to method and the control system thereof of a kind of coil wrapper roll ladder speed control.
Background technology
Coiling machine is the visual plant of hot rolling line, for the hot-strip of rolling is rolled into coil of strip.As shown in Figure 1, coiling machine 1 is positioned at after mm finishing mill unit 2, is last procedure of hot continuous rolling production line.Referring to Fig. 1, coiling machine 1 mainly comprise roller-way 11, flipper guide 12, pinch roll 13, three help winding up roller 14, help the capital equipment such as winding up roller hydraulic cylinder 15, reel 16.Wherein main being responsible for of roller-way 11 is delivered to coiling machine unit by band steel 7 by mm finishing mill unit.The Main Function of flipper guide 12 is centering band steel.The Main Function of pinch roll 13 is to sting the steel stage to apply certain clamping force with steel at head, it is implemented to flexural deformation for the first time simultaneously; Batch the stage to apply stable tension force with steel, to ensure good scroll quality at afterbody.Help winding up roller 14 to help curved bel steel 7, and make to be with steel to be tightly wound around coiling 15.Help gap between winding up roller and reel to be called and help winding up roller roll gap, help winding up roller roll gap by helping winding up roller oil cylinder 16 to control.Reel 15 is nucleus equipments of coiling machine, after band steel is wound around, it is applied to forward direction tension force, up-to-standard to guarantee scroll.
In the time that band steel 7 heads pass mm finishing mill unit 2 end frame, in order to make to be with steel 7 better to move on runout table, prevent from being with steel head to beat, runout table is to be greater than the leading speed operation of finishing mill terminal frame, give band steel forward direction tension force, meanwhile, pinch roll, reel and help winding up roller all with certain leading speed operation, help winding up roller to accommodate reel edge, so that band steel head gives while entering reel band steel a downforce.
But rear operation, in the time producing the band steel on high surface, finds after pickling that the inner ring 30m left and right of coils of hot-rolled steel exists a large amount of tip-like to dampen defect, and more serious the closer to band steel head defect.
Analyze from links technique, find that this defect is mainly due to degree of compacting deficiency between coils of hot-rolled steel inner ring volume layer, rear operation rolls up in the time carrying out coil of strip uncoiling that fault is moving to be caused.Rear operation is adding man-hour to hot rolled coil, coil of strip need to be opened, and this process is called uncoiling.In the time that uncoiling starts, draw a straight line at band steel steel roll rim, as shown in Figure 2, find that distortion has occurred this line in the time opening to inner ring of steel coil, as shown in Figure 3, prove, between circle and circle, the changing of the relative positions has occurred, thereby caused the contusion defect of needle-like.
Chinese invention patent application " coiling hot continuous rolling high-intensity medium plate " (application for a patent for invention number: 200810080249.2 publication numbers: CN 101439366A) discloses a kind of coiling hot continuous rolling high-intensity medium plate, is applicable to have that material is hard, specification is thick, the hot rolled steel plate of intensity high produces; Object is to eliminate the destabilizing factor of cut deal while batching, reduce Surface Defects in Steel Plate; Setting and the adjustment of parameter control carried out in this invention for hot continuous rolling coiling machine group, comprise the setting of G roller table speed, selects the leading rate of suitable roller-way and hysteresis rate, and selection pressure coefficient, adjusts side guide pressure coefficient, demarcates Withdrawal roll pressure coefficient; The control of upper bottom pinch roll electric current negative current, helps winding up roller gap and opens distance parameter and set; Determine reel tension added value and current ratio.
The domestic and international most hot continuous rollings in the world produce line and have all adopted speed in advance and tension coiling control technology at present, but according to the confirmation that these are produced to line product quality in kind, product coil of strip below all thickness 7mm all exists head in various degree to dampen defect, and distance is general all 20～25 meters of left and right.Leading and the tension coiling of this proof speed cannot ensure the degree of compacting that inner ring 10 encloses.
According to existing solution, in the time that band steel head passes finishing mill terminal frame, in order to make to be with steel better to move on runout table, prevent from being with steel head to beat, runout table, to be greater than the leading speed operation of finishing mill terminal frame, gives band steel a forward direction tension force, simultaneously, pinch roll, reel and help winding up roller all with certain leading speed operation, help winding up roller to accommodate reel edge, so as band steel head while entering reel to downforce of band steel.After reel moment reaches certain value, coiling machine switches to Torque Control by speed control, between reel and finish rolling end frame, keeps certain tension force.In this course, band steel enters before coiling machine and reel switch to Torque Control at head, roller rest road, pinch roll, reel, help the leading speed of winding up roller to keep the tensile force between volume layer, after switching to Torque Control, keep the compactness between volume layer by the tension force between reel and finish rolling end frame.
But there is following defect in prior art scheme:
1, help that the leading rate of winding up roller is excessive to be caused too soon in advance, cause the width narrowing with steel
In order to ensure with tighter being wrapped on reel of steel head, just must further improve reel and the leading rate that helps winding up roller, but reel or help excessive easily the causing of leading rate of winding up roller stinging the moment width narrowing of steel with steel, the particularly thin gauge strip to thickness≤7mm, width narrowing phenomenon is particularly serious.Main cause is as follows: for example, by pinch roll, reel, helps the leading rate of winding up roller to be set as respectively 1.05,1.10,1.20, in coil process, due to reel with help between winding up roller speed poor excessive, cause the overtension that is subject to steel, thereby cause width narrowing (as shown in Figure 4).
2, tension force control is worked more lately, causes coils of hot-rolled steel inner ring degree of compacting deficiency, band steel head serious contusion
Be wound around after coiling and between reel, forming certain tension value and the process that is unlikely to loose winding is called and builds with steel.Because tension force control is just to work after reel is built, therefore occurred frequently with 10 enclosing the effect of not playing decision before steel for dampening.That builds a signal issues time point as shown in Figure 5: reel electric current reaches after certain threshold value, postponing the regular hour, builds a signal and just issues, and is now with steel to reach more than 20 meters around coiling.
Summary of the invention
The object of this invention is to provide a kind of for controlling the control method that helps winding up roller speed of coiling machine of hot rolling line, help the leading rate of winding up roller by adjustment, formation helps the ladder speed of winding up roller, dampens the problem of defect and strip width drawing down to reduce the inner ring of coils of hot-rolled steel.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of coil wrapper roll ladder method for control speed, the control that helps winding up roller speed for the computer control system of hot rolling line to coiling machine, after described coiling machine is connected to the mm finishing mill unit of hot rolling line, described coiling machine comprises that pinch roll, first helps winding up roller, second to help winding up roller and the 3rd to help winding up roller, is characterized in that:
Hardness, thickness and the coiling temperature of described computer control system Real-time Obtaining band steel;
Determine the leading rate adjustment of speed parameter according to following Rule of judgment:
If 1. the hardness with steel improves, the leading rate that gathers way is adjusted parameter;
If 2. the thickness with steel increases, the leading rate that gathers way is adjusted parameter;
If 3. the temperature with steel raises, the leading rate that underspeeds is adjusted parameter;
Adjust parameter according to the leading rate of speed, calculating respectively first helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, help respectively the leading rate of winding up roller according to each, control first and help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller, form the ladder speed steadily increasing progressively.
The preferred technical scheme of one of coil wrapper roll ladder method for control speed of the present invention, described computer control system comprises one-level computer and second computer, it is characterized in that comprising the following steps:
S100) described second computer receives stinging after steel signal of mm finishing mill unit, obtains hardness and thickness data with steel, and by the coiling temperature of coiling temperature temperature measurer Real-time Obtaining, determines hardness rank, thickness rank and coiling temperature rank with steel;
S200) described second computer is determined according to step S100 the hardness rank with steel, thickness rank and coiling temperature rank, determine the leading rate adjustment of hardness parameter X 1, the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, wherein, the span of X1 is that the span that the span of 0.5～2.5, X2 is 0.5～4, X3 is 1.5～0;
S300) leading the hardness of obtaining from step S200 rate is adjusted parameter X 1 by described second computer, and the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, the one-level computer described in being sent to;
S400) the leading rate of hardness that described one-level computer receives according to step S300 is adjusted parameter X 1, the leading rate of thickness adjusts parameter X 2 and the leading rate of coiling temperature is adjusted parameter X 3, determine the leading rate adjustment of speed parameter X according to formula X=X1+X2+X3, then according to formula
WR1=PR+X
WR2=WR1+X=PR+2X
WR3=WR2+X=PR+3X
Calculate first and help winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, wherein, WR1 first helps the leading rate of winding up roller, and WR2 second helps the leading rate of winding up roller, and WR3 the 3rd helps the leading rate of winding up roller, and X is that the leading rate of speed is adjusted parameter, and PR is the leading rate of pinch roll;
What S500) described one-level computer calculated according to step S400 first helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, determine that first helps winding up roller, second to help winding up roller and the 3rd to help the speed setting value of winding up roller, control respectively the speed that each helps winding up roller, make the pinch roll, first contacting with the strip help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller to increase progressively successively, form the ladder speed steadily increasing progressively.
The preferably technical scheme of one of coil wrapper roll ladder method for control speed of the present invention, is characterized in that in described step S100, determines the thickness rank with steel according to belt steel thickness according to following condition:
The belt steel thickness < 2.38mm of the first thickness rank;
The belt steel thickness of the second thickness rank is 2.38～4.05mm;
The belt steel thickness of the 3rd thickness rank is 4.05～5.53mm;
The belt steel thickness of the 4th thickness rank is 5.53～6.99mm;
The belt steel thickness of the 5th thickness rank is 6.99～10.99mm;
The belt steel thickness of the 6th thickness rank is 10.99～13.99mm;
The belt steel thickness of the 7th thickness rank is 13.99～16.99mm;
The belt steel thickness > 16.99mm of the 8th thickness rank.
The better technical scheme of one of coil wrapper roll ladder method for control speed of the present invention, is characterized in that in described step S100, determines the coiling temperature rank with steel according to the coiling temperature with steel according to following condition:
First batches 600 DEG C of other coiling temperature of temperature level <;
Second to batch other coiling temperature of temperature level be 600～650 DEG C;
The coiling temperature of the 3rd coiling temperature rank is 650～700 DEG C;
700 DEG C of other coiling temperature of temperature level > are got in Volume Four.
The improved technical scheme of one of coil wrapper roll ladder method for control speed of the present invention, is characterized in that in described step S100, determines the hardness rank with steel according to the hardness with steel according to following condition:
Other band steel hardness of the first durometer level is 200～250N/mm
2;
Other band steel hardness of the second durometer level is 250～300N/mm
2;
Other band steel hardness of the 3rd durometer level is 300～350N/mm
2;
Other band steel hardness of the 4th durometer level is 350～400N/mm
2;
The band steel hardness of five stiffness degree rank is 400～450N/mm
2;
Other band steel hardness of the 6th durometer level is 450～500N/mm
2;
Other band steel hardness of the 7th durometer level is 500～550N/mm
2;
Other band steel hardness of the 8th durometer level is 550～600N/mm
2;
Other band steel hardness of the 9th durometer level is 600～650N/mm
2;
Other band steel hardness of the tenth durometer level is 650～700N/mm
2.
The further improved technical scheme of one of coil wrapper roll ladder method for control speed of the present invention, it is characterized in that the leading rate adjustment of described hardness parameter X 1, the leading rate adjustment parameter X 2 of thickness and the leading rate adjustment of coiling temperature parameter X 3 are stored in respectively the leading rate that hardness rank, thickness rank and coiling temperature rank with steel are index value and adjust in parameter list, step S200 tables look-up and determines the leading rate adjustment parameter of correspondence according to the hardness rank with steel, thickness rank and coiling temperature rank.
Another object of the present invention be to provide a kind of use above-mentioned coil wrapper roll ladder method for control speed help winding up roller speed control system, the present invention solves the problems of the technologies described above adopted technical scheme and is:
A kind of use above-mentioned coil wrapper roll ladder method for control speed help winding up roller speed control system, for the control that helps winding up roller speed of hot rolling line computer control system to coiling machine, described computer control system comprises one-level computer and second computer, after described coiling machine is connected to the mm finishing mill unit of hot rolling line, described coiling machine comprises pinch roll, first helps winding up roller, second helps winding up roller and the 3rd to help winding up roller, the arrival end of coiling machine is connected to the port of export of mm finishing mill unit, described second computer is connected to one-level computer by computer network, described one-level computer is connected to the drive motors that respectively helps winding up roller of coiling machine by motor control module, described one-level computer sends motor control module to speed setting value, respectively help the speed of winding up roller by drive motors control, it is characterized in that:
Described second computer comprises hardness rank determination module, thickness rank determination module and temperature rank determination module;
Described coiling machine arrival end is provided with coiling temperature temperature measurer, and the coiling temperature detecting is in real time sent to described temperature rank determination module by described coiling temperature temperature measurer;
Described one-level computer comprises that the leading rate of speed adjusts parameter determination module, the leading rate computing module of speed, and the one the second and the 3rd help winding up roller Speed Setting module;
The leading rate of described speed is adjusted parameter determination module, obtains hardness rank, thickness rank and the temperature rank with steel by second computer, determines the leading rate adjustment of speed parameter, and sends the described leading rate computing module of speed to;
The leading rate computing module of described speed calculates first and helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of speed of winding up roller, and first, second, and third described in sending to respectively helped winding up roller Speed Setting module;
Described first, second, and third helps winding up roller Speed Setting module, according to the leading rate of the speed that respectively helps winding up roller, determine that first helps winding up roller, second to help winding up roller and the 3rd to help the speed setting value of winding up roller, send respectively each to and help the drive motors of winding up roller by motor control module, control respectively first and help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller to increase progressively successively, form the ladder speed steadily increasing progressively.
The invention has the beneficial effects as follows:
1. coil wrapper roll ladder method for control speed of the present invention, according to the hardness of Real-time Obtaining band steel, thickness and coiling temperature, adjustment helps the leading rate of winding up roller, forms the ladder speed that helps winding up roller, and the inner ring that can reduce coils of hot-rolled steel is dampened the problem of defect and strip width drawing down.
The above-mentioned coil wrapper roll ladder of use of the present invention method for control speed help winding up roller speed control system, use the existing computer control system of hot-rolling mill set control system, only need to increase the drive motors that coiling temperature temperature measurer just can utilize existing motor control module and help winding up roller, realize and help the control of winding up roller ladder speed by computer program control, thereby improve the control accuracy of coiling machine, reduce band steel rolling defect, improve belt steel rolling product quality.
Brief description of the drawings
Fig. 1 is the structural representation of coiling machine.
Fig. 2 is the schematic diagram of hot-rolled steel crimping linear mark that portion draws in the time that coils of hot-rolled steel starts uncoiling.
Fig. 3 for coils of hot-rolled steel uncoiling during to inner ring in Fig. 2 the schematic diagram of the linear mark of drawing distortion.
Fig. 4 is the schematic diagram of coils of hot-rolled steel width narrowing in coil process.
Fig. 5 is the sequential chart that in coiling machine, reel is built a process.
Fig. 6 is the structural representation that helps winding up roller speed control system for coil wrapper roll ladder method for control speed of the present invention.
In figure, 1-coiling machine, 11 roller-ways, 12-flipper guide, 13-pinch roll, 14-helps winding up roller, 1401-first helps winding up roller, 1402-second helps winding up roller, 1403-the 3rd helps winding up roller, 15-reel, 16-helps winding up roller hydraulic cylinder, 2-mm finishing mill unit, 3-second computer, 301-hardness rank determination module, 302-thickness rank determination module, 303-temperature rank determination module, 4-one-level computer, the leading rate of 401-speed is adjusted parameter determination module, the leading rate computing module of 402-speed, 403-first helps winding up roller Speed Setting module, 404-second helps winding up roller Speed Setting module, 405 the 3rd help winding up roller Speed Setting module, 5-motor control module, 6-drive motors, 7-is with steel.
Detailed description of the invention
In order to understand better technique scheme of the present invention, describe in detail further below in conjunction with drawings and Examples.
An embodiment who helps winding up roller speed control system who uses coil wrapper roll ladder method for control speed of the present invention is as shown in Figure 6, this system is for the control that helps winding up roller speed of hot rolling line computer control system to coiling machine, hot rolling line computer control system comprises one-level computer 4 and second computer 3, after coiling machine 1 is connected to the mm finishing mill unit 2 of hot rolling line, coiling machine 1 comprises pinch roll 13 and helps winding up roller 14, wherein help winding up roller 14 to comprise that first helps winding up roller 1401, second helps winding up roller 1402 and the 3rd to help winding up roller 1403, the arrival end of coiling machine 1 is connected to the port of export of mm finishing mill unit 2, second computer 3 is connected to one-level computer 4 by computer network, one-level computer 4 is connected to the drive motors that helps winding up roller 14 6 of coiling machine 1 by motor control module 5, one-level computer 4 sends motor control module 5 to speed setting value, control by drive motors 6 speed that helps winding up roller 14.In Fig. 6, ignore the ins and outs of the driving mechanism of each workpiece of coiling machine, after merging, unified simplification represents with drive motors 6.
In this embodiment, second computer 3 comprises hardness rank determination module 301, thickness rank determination module 302 and temperature rank determination module 303.
Coiling machine 1 arrival end is provided with coiling temperature temperature measurer (not shown), and the coiling temperature detecting is in real time sent to described temperature rank determination module by described coiling temperature temperature measurer; Described coiling temperature analyzer can be selected: LAND company, system 4, temperature measurer model: M2 300～1100 response speed 5ms(0 to 95%); Processor model: landmark graphic output renewal frequency 10ms.
One-level computer 4 comprises that the leading rate of speed adjusts parameter determination module 401, the leading rate computing module 402 of speed, and first help winding up roller Speed Setting module 403, second to help winding up roller Speed Setting module 404 and the 3rd to help winding up roller Speed Setting module 405.
The leading rate of speed is adjusted parameter determination module 401, obtains hardness rank, thickness rank and the temperature rank with steel by second computer 3, determines the leading rate adjustment of speed parameter, and the leading rate computing module 402 of the speed that sends to.
The leading rate computing module 402 of speed calculates first and helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of speed of winding up roller, sends respectively first to and helps winding up roller Speed Setting module 403, second to help winding up roller Speed Setting module 404 and the 3rd to help winding up roller Speed Setting module 405.In this embodiment, second computer 3 and one-level computer 4 are the computer of existing hot rolling line computer control system, wherein each functional module is all connected and is realized transfer of data by the logic of computer-internal, and therefore, Fig. 6 has omitted the annexation between each module.
First helps winding up roller Speed Setting module 403, second to help winding up roller Speed Setting module 404 and the 3rd to help winding up roller Speed Setting module 405, according to the leading rate of the speed that respectively helps winding up roller, determine that first helps winding up roller, second to help winding up roller and the 3rd to help the speed setting value of winding up roller, send respectively the drive motors that respectively helps winding up roller to by motor control module, control first and help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller to increase progressively successively, form the ladder speed steadily increasing progressively.
The principle of the establishing method of a kind of coil wrapper roll ladder speed provided by the present invention is as follows:
Caused strip width drawing down because leading rate arranges conference, tension force control is switched again too late, cannot play effective effect, addresses this problem so must seek additive method.Through large quantitative analysis and experiment, under existing technical conditions, leading rate being increased simultaneously as far as possible ensure not only each object speed smooth transition contacting with the strip is to improve inner ring degree of compacting but also the best method of drawing down not.From current appointed condition and technique, at the pinch roll that only has of coiling process neutral zone steel contact, reel and 3 help winding up roller, according to existing technique setting, according to hardness rank, thickness rank, temperature rank, pinch roll is set as to a leading rate, reel is set as a leading rate, and 3 are helped winding up roller to be set as same leading rate, therefore as ensured higher leading rate, certainly will make between these several the objects that contact with the strip speed poor excessive, thereby cause drawing down.Poor in order to reduce this speed, it is a kind of ideal method that 3 speed that help winding up roller are set by different speed, can ensure higher leading rate, can keep again speed difference between every object in certain zone of reasonableness.
But because each hardness with steel is all different with temperature, be down to minimumly although speed is poor, for mild steel, it is excessive that leading rate arranges, and still more easily causes drawing down.Therefore, need to set up according to the characteristic with steel the layering of leading rate velocity step ladder control to coiling machine, just can realize according to the feature of different cultivars, gauge strip steel and take different ladder speed.Realize each steel grade and can ensure to be with steel inner ring degree of compacting, reduce again width narrowing.
According to the analysis of width narrowing phenomenon is in the past found, drawing down and band steel steel grade, specification, the relation of temperature is the closest.The steel grade of impact with steel drawing down, specification, temperature data is also a lot, if adopt total data as variable, only steel grade just reaches thousands of kinds, database is huger.For this reason, we have only filtered out steel grade (being hardness), coiling temperature, and these 3 of thickness are on the most significant variable of the impact of drawing down.According to steel grade, coiling temperature, thickness carries out rude classification to band steel grade class, take the different winding up roller velocity step ladder control that helps according to the feature of different size band steel, do not occur under the prerequisite of drawing down in guarantee, improve as far as possible the degree of compacting of inner ring of steel coil, the contusion defect when reducing coils of hot-rolled steel uncoiling.
Due to the characteristic of each steel grade, the thickness of different steel and temperature setting are all different, help between winding up roller and help winding up roller and reel between speed poorly must keep certain reasonability, too greatly more easily cause strip width drawing down, too littlely cannot bring into play due effect.Through a large amount of experimental verifications, find that there is following rule:
Hardness group with steel is lower, the easier drawing down of width;
Temperature with steel is higher, the easier drawing down of width;
Thickness with steel is thinner, the easier drawing down of width.
According to this rule, the invention provides following coil wrapper roll ladder method for control speed, the control that helps winding up roller speed for the computer control system of hot rolling line to coiling machine, after described coiling machine is connected to the mm finishing mill unit of hot rolling line, described coiling machine comprises that pinch roll, first helps winding up roller, second to help winding up roller and the 3rd to help winding up roller.
First, utilize hardness, thickness and the coiling temperature of the computer control system Real-time Obtaining band steel of hot rolling line;
Secondly, determine the leading rate adjustment of speed parameter according to following Rule of judgment:
If 1. the hardness with steel improves, the leading rate that gathers way is adjusted parameter;
If 2. the thickness with steel increases, the leading rate that gathers way is adjusted parameter;
If 3. the temperature with steel raises, the leading rate that underspeeds is adjusted parameter;
Then, adjust parameter according to the leading rate of speed, calculate respectively first and help winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, help respectively the leading rate of winding up roller according to each, control first and help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller, form the ladder speed steadily increasing progressively.
According to an embodiment of coil wrapper roll ladder method for control speed of the present invention, the other velocity step ladder of following layering is set and sets scheme:
The first order: hardness rank (corresponding with steel grade characteristic), is divided into 10 grades; Hardness rank can reflect the strength characteristics with steel; Obtain according to second computer with the hardness rank of steel rolling scaduled in actual hardness value determine.
The second level: thickness rank, point 8 grades; Target thickness value during the employing of obtaining according to second computer with the thickness rank of steel is rolling scaduled is determined.
The third level: temperature rank, point 4 grades.In these 3 variablees, coiling temperature fluctuation is larger, so must adopt coiling temperature measured value.For this reason must newly-increased coiling temperature temperature measurer before coiling machine.Coiling temperature adopts measured value, second computer by be arranged on steel head 10 measurement points detect in real time, determine temperature rank after calculating average actual measurement coiling temperature.
The preferred embodiment of one of coil wrapper roll ladder method for control speed of the present invention, comprises the following steps:
S100) enter the first frame of mm finishing mill unit 2 with steel 7, second computer 3 is received stinging after steel signal of mm finishing mill unit the first frame, obtain hardness and thickness data with steel 7, and by the coiling temperature of coiling temperature temperature measurer Real-time Obtaining, determine hardness rank, thickness rank and coiling temperature rank with steel.
Wherein, hardness rank determination module 301 is determined the hardness rank with steel according to the hardness with steel according to following condition:
Other band steel hardness of the first durometer level is 200～250N/mm
2;
Other band steel hardness of the second durometer level is 250～300N/mm
2;
Other band steel hardness of the 3rd durometer level is 300～350N/mm
2;
Other band steel hardness of the 4th durometer level is 350～400N/mm
2;
The band steel hardness of five stiffness degree rank is 400～450N/mm
2;
Other band steel hardness of the 6th durometer level is 450～500N/mm
2;
Other band steel hardness of the 7th durometer level is 500～550N/mm
2;
Other band steel hardness of the 8th durometer level is 550～600N/mm
2;
Other band steel hardness of the 9th durometer level is 600～650N/mm
2;
Other band steel hardness of the tenth durometer level is 650～700N/mm
2.
Thickness rank determination module 302 is determined the thickness rank with steel according to belt steel thickness according to following condition:
The belt steel thickness < 2.38mm of the first thickness rank;
The belt steel thickness of the second thickness rank is 2.38～4.05mm;
The belt steel thickness of the 3rd thickness rank is 4.05～5.53mm;
The belt steel thickness of the 4th thickness rank is 5.53～6.99mm;
The belt steel thickness of the 5th thickness rank is 6.99～10.99mm;
The belt steel thickness of the 6th thickness rank is 10.99～13.99mm;
The belt steel thickness of the 7th thickness rank is 13.99～16.99mm;
The belt steel thickness > 16.99mm of the 8th thickness rank.
Temperature rank determination module 303 is determined the coiling temperature rank with steel according to the coiling temperature with steel according to following condition:
First batches 600 DEG C of other coiling temperature of temperature level <;
Second to batch other coiling temperature of temperature level be 600～650 DEG C;
The coiling temperature of the 3rd coiling temperature rank is 650～700 DEG C;
700 DEG C of other coiling temperature of temperature level > are got in Volume Four.
S200) second computer 3 is determined according to step S100 the hardness rank with steel 7, thickness rank and coiling temperature rank, determine respectively the leading rate adjustment of hardness parameter X 1, the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, wherein, the span of X1 is that the span that the span of 0.5～2.5, X2 is 0.5～4, X3 is 1.5～0;
S300) leading the hardness of obtaining from step S200 rate is adjusted parameter X 1 by second computer 3, and the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, the one-level computer 4 described in being sent to;
S400) the leading rate of hardness that one-level computer 4 receives according to step S300 is adjusted parameter X 1, the leading rate of thickness adjusts parameter X 2 and the leading rate of coiling temperature is adjusted parameter X 3, determine the leading rate adjustment of speed parameter X according to formula X=X1+X2+X3, then according to formula
WR1=PR+X
WR2=WR1+X=PR+2X
WR3=WR2+X=PR+3X
Calculate first and help winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the leading rate of winding up roller 1403, wherein, WR1 first helps the leading rate of winding up roller, WR2 second helps the leading rate of winding up roller, WR3 the 3rd helps the leading rate of winding up roller, and PR is the leading rate of pinch roll, and X is that the leading rate of speed is adjusted parameter.The leading rate PR of pinch roll in formula is the external parameter of obtaining from the leading rate setting of the coiling machine table of existing control system, and its span is generally 105～118.
What S500) one-level computer 4 calculated according to step S400 first helps winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the leading rate of winding up roller 1403, determine that first helps winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the speed setting value of winding up roller 1403, control respectively the speed that each helps winding up roller, make the pinch roll 13, first contacting with the strip help winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the speed of winding up roller 1403 to increase progressively successively, form the ladder speed steadily increasing progressively.
According to the embodiment of coil wrapper roll ladder method for control speed of the present invention, the leading rate adjustment of described hardness parameter X 1, the leading rate adjustment parameter X 2 of thickness and the leading rate adjustment of coiling temperature parameter X 3 are stored in respectively the leading rate that hardness rank, thickness rank and coiling temperature rank with steel are index value and adjust in parameter list, and step S200 tables look-up and determines the leading rate adjustment parameter of correspondence according to the hardness rank with steel, thickness rank and coiling temperature rank.
According to this embodiment, in the rank tables of data as shown in table 1, table 2 and table 3 first above-mentioned hardness rank, thickness rank and coiling temperature rank being stored respectively:
Table 1 hardness rank tables of data
Table 1 thickness rank tables of data
Table 3 coiling temperature rank tables of data
| Coiling temperature rank | 1 | 2 | 3 | 4 |
| Corresponding temperature (DEG C) | ＜600 | 600～650 | 650～700 | ＞700 |
Then, then according to the tier levels number of hardness rank, thickness rank and coiling temperature rank of dividing; The leading rate of setting up taking the hardness rank with steel, thickness rank and coiling temperature rank as index value is adjusted parameter list, and the leading rate that leading hardness rate adjustment parameter X 1, the leading rate adjustment parameter X 2 of thickness and the leading rate adjustment of coiling temperature parameter X 3 is stored in respectively to foundation is adjusted in parameter list.According to the embodiment shown in table 1, table 2 and table 3, hardness rank is divided into 10 grades, thickness rank is divided into 8 grades, coiling temperature rank is divided into 4 grades, the leading rate of correspondence establishment as shown in table 5, table 6 and table 4 adjusted parameter list, store respectively the hardness leading rate adjustment ginseng table (table 4) of the leading rate adjustment of hardness parameter X 1, the leading rate adjustment parameter list of thickness (table 5) that the leading rate of storage thickness is adjusted parameter X 2, and the leading rate of storage coiling temperature of the leading rate adjustment of storage coiling temperature parameter X 3 is adjusted parameter list (table 6).
The leading rate of table 4 hardness is adjusted parameter list
| Hardness rank | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| X1 value | 0.5 | 0.5 | 1 | 1 | 1.5 | 1.5 | 2 | 2 | 2.5 | 2.5 |
The leading rate of table 5 thickness is adjusted parameter list
| Thickness rank | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| X2 value | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 |
The leading rate of table 6 temperature is adjusted parameter list
| Temperature rank | 1 | 2 | 3 | 4 |
| X3 value | 1.5 | 1 | 0.5 | 0 |
embodiment
Suppose to enter the band steel 7 of finishing stand, its yield strength is 520N/mm
2, thickness is 4.5mm, coiling temperature rank is 630 DEG C;
Process in accordance with the present invention S100, second computer 3 obtains actual hardness, thickness and the coiling temperature with steel 7, according to the scope at its numerical value place, inquire about above-mentioned hardness, thickness and coiling temperature rank tables of data (table 1～3), determine to be 7 with the hardness group rank of steel 7, thickness rank is 3, and coiling temperature rank is 2.
Process in accordance with the present invention S200, second computer 3 is according to the hardness rank with steel 7, thickness rank and coiling temperature rank, from table 5～6, table look-up and determine the leading rate adjustment of corresponding hardness parameter X 1=2%, the leading rate of thickness is adjusted parameter X 2=1.5%, and the leading rate of coiling temperature is adjusted parameter X 3=1%.
Process in accordance with the present invention S300, leading the hardness of obtaining from step S200 rate is adjusted parameter X 1 by second computer 3, and the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, the one-level computer 4 described in being sent to.
Process in accordance with the present invention S400, one-level computer 4 is adjusted parameter X 1 according to the leading rate of the hardness receiving, the leading rate of thickness adjusts parameter X 2 and the leading rate of coiling temperature is adjusted parameter X 3, the leading rate of the speed that calculates is adjusted parameter X=X1+X2+X3=2%+1.5%+1%=4.5%, according to setting from the leading rate of original coiling machine the leading rate PR=108% of pinch roll reading table (table 7), calculate first according to formula and help winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the leading rate of winding up roller 1403 again:
WR1=PR+X=108%+4.5%=112.5%；
WR2=PR+2X=108%+4.5%*2=117%；
WR3=PR+3X=108%+4.5%*3=121.5%。
Process in accordance with the present invention S500, what one-level computer 4 calculated according to step S400 first helps winding up roller 1401, second to help winding up roller 1402 and the 3rd to help leading rate WR1, WR2 and the WR3 of winding up roller 1403, determine that first helps winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the speed setting value of winding up roller 1403, control respectively the speed that each helps winding up roller, make to help winding up roller 1401, second to help winding up roller 1402 and the 3rd to help the speed of winding up roller 1403 to increase progressively successively with the pinch roll 13 contacting with steel 7, first, form the ladder speed steadily increasing progressively.
Table 7 is examples for the leading rate setting of original coiling machine table, and due to various hardness ranks, thickness rank and coiling temperature rank can be combined as a very huge form, and table 7 has only selected the part relevant to the present embodiment as example.
The leading rate of the original coiling machine of table 7 is set table (part)
| Hardness rank | Thickness rank | Temperature rank | PR | MD | WR |
| …… | |||||
| 7 | 1 | 2 | 108 | 110 | 112 |
| 7 | 2 | 2 | 108 | 110 | 112 |
| 7 | 3 | 1 | 108 | 110 | 112 |
| 7 | 3 | 2 | 108 | 110 | 112 |
| 7 | 4 | 1 | 112 | 114 | 115 |
| 7 | 4 | 2 | 112 | 114 | 115 |
| …… | |||||
| 7 | 6 | 2 | 118 | 123 | 125 |
| …… |
In table 7, PR is the leading rate of pinch roll, and WR is for helping the leading rate of winding up roller, and MD is the leading rate of reel.As can be seen from Table 7, according to original technique setting, according to hardness rank, thickness rank and coiling temperature rank, pinch roll 13 is set as a leading rate PR, and reel 15 is set as a leading rate MD, 3 are helped winding up roller 14 to be set as same leading rate WR, therefore as will ensure higher leading rate, certainly will cause between these several the objects that contact with the strip speed poor excessive, thereby cause drawing down; Otherwise, just may cause because tension force is on the low side coils of hot-rolled steel inner ring degree of compacting deficiency, cause being with steel head to produce and dampen defect.
Those of ordinary skill in the art will be appreciated that; above embodiment is only for technical scheme of the present invention is described; and be not used as limitation of the invention; any variation of the above embodiment being done based on connotation of the present invention, modification, all will drop in the protection domain of claim of the present invention.
Claims (7)
1. a coil wrapper roll ladder method for control speed, the control that helps winding up roller speed for the computer control system of hot rolling line to coiling machine, after described coiling machine is connected to the mm finishing mill unit of hot rolling line, described coiling machine comprises that pinch roll, first helps winding up roller, second to help winding up roller and the 3rd to help winding up roller, is characterized in that:
Hardness, thickness and the coiling temperature of described computer control system Real-time Obtaining band steel;
Determine the leading rate adjustment of speed parameter according to following Rule of judgment:
If 1. the hardness with steel improves, the leading rate that gathers way is adjusted parameter;
If 2. the thickness with steel increases, the leading rate that gathers way is adjusted parameter;
If 3. the temperature with steel raises, the leading rate that underspeeds is adjusted parameter;
Adjust parameter according to the leading rate of speed, calculating respectively first helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, help respectively the leading rate of winding up roller according to each, control first and help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller, form the ladder speed steadily increasing progressively.
2. coil wrapper roll ladder method for control speed according to claim 1, described computer control system comprises one-level computer and second computer, it is characterized in that comprising the following steps:
S100) described second computer receives stinging after steel signal of mm finishing mill unit, obtains hardness and thickness data with steel, and by the coiling temperature of coiling temperature temperature measurer Real-time Obtaining, determines hardness rank, thickness rank and coiling temperature rank with steel;
S200) described second computer is determined according to step S100 the hardness rank with steel, thickness rank and coiling temperature rank, determine the leading rate adjustment of hardness parameter X 1, the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, wherein, the span of X1 is that the span that the span of 0.5～2.5, X2 is 0.5～4, X3 is 1.5～0;
S300) leading the hardness of obtaining from step S200 rate is adjusted parameter X 1 by described second computer, and the leading rate of thickness is adjusted parameter X 2, and the leading rate of coiling temperature is adjusted parameter X 3, the one-level computer described in being sent to;
S400) the leading rate of hardness that described one-level computer receives according to step S300 is adjusted parameter X 1, the leading rate of thickness adjusts parameter X 2 and the leading rate of coiling temperature is adjusted parameter X 3, determine the leading rate adjustment of speed parameter X according to formula X=X1+X2+X3, then according to formula
WR1=PR+X
WR2=WR1+X=PR+2X
WR3=WR2+X=PR+3X
Calculate first and help winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, wherein, WR1 first helps the leading rate of winding up roller, and WR2 second helps the leading rate of winding up roller, and WR3 the 3rd helps the leading rate of winding up roller, and X is that the leading rate of speed is adjusted parameter, and PR is the leading rate of pinch roll;
What S500) described one-level computer calculated according to step S400 first helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of winding up roller, determine that first helps winding up roller, second to help winding up roller and the 3rd to help the speed setting value of winding up roller, control respectively the speed that each helps winding up roller, make the pinch roll, first contacting with the strip help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller to increase progressively successively, form the ladder speed steadily increasing progressively.
3. coil wrapper roll ladder method for control speed according to claim 2, is characterized in that in described step S100, determines the thickness rank with steel according to belt steel thickness according to following condition:
The belt steel thickness < 2.38mm of the first thickness rank;
The belt steel thickness of the second thickness rank is 2.38～4.05mm;
The belt steel thickness of the 3rd thickness rank is 4.05～5.53mm;
The belt steel thickness of the 4th thickness rank is 5.53～6.99mm;
The belt steel thickness of the 5th thickness rank is 6.99～10.99mm;
The belt steel thickness of the 6th thickness rank is 10.99～13.99mm;
The belt steel thickness of the 7th thickness rank is 13.99～16.99mm;
The belt steel thickness > 16.99mm of the 8th thickness rank.
4. coil wrapper roll ladder method for control speed according to claim 2, is characterized in that in described step S100, determines the coiling temperature rank with steel according to the coiling temperature with steel according to following condition:
First batches 600 DEG C of other coiling temperature of temperature level <;
Second to batch other coiling temperature of temperature level be 600～650 DEG C;
The coiling temperature of the 3rd coiling temperature rank is 650～700 DEG C;
700 DEG C of other coiling temperature of temperature level > are got in Volume Four.
5. coil wrapper roll ladder method for control speed according to claim 2, is characterized in that in described step S100, determines the hardness rank with steel according to the hardness with steel according to following condition:
Other band steel hardness of the first durometer level is 200～250N/mm
2;
Other band steel hardness of the second durometer level is 250～300N/mm
2;
Other band steel hardness of the 3rd durometer level is 300～350N/mm
2;
Other band steel hardness of the 4th durometer level is 350～400N/mm
2;
The band steel hardness of five stiffness degree rank is 400～450N/mm
2;
Other band steel hardness of the 6th durometer level is 450～500N/mm
2;
Other band steel hardness of the 7th durometer level is 500～550N/mm
2;
Other band steel hardness of the 8th durometer level is 550～600N/mm
2;
Other band steel hardness of the 9th durometer level is 600～650N/mm
2;
Other band steel hardness of the tenth durometer level is 650～700N/mm
2.
6. coil wrapper roll ladder method for control speed according to claim 2, it is characterized in that the leading rate adjustment of described hardness parameter X 1, the leading rate adjustment parameter X 2 of thickness and the leading rate adjustment of coiling temperature parameter X 3 are stored in respectively the leading rate that hardness rank, thickness rank and coiling temperature rank with steel are index value and adjust in parameter list, step S200 tables look-up and determines the leading rate adjustment parameter of correspondence according to the hardness rank with steel, thickness rank and coiling temperature rank.
7. what a right to use required coil wrapper roll ladder method for control speed described in arbitrary claim of 1 to 6 helps winding up roller speed control system, for the control that helps winding up roller speed of hot rolling line computer control system to coiling machine, described computer control system comprises one-level computer and second computer, after described coiling machine is connected to the mm finishing mill unit of hot rolling line, described coiling machine comprises pinch roll, first helps winding up roller, second helps winding up roller and the 3rd to help winding up roller, the arrival end of coiling machine is connected to the port of export of mm finishing mill unit, described second computer is connected to one-level computer by computer network, described one-level computer is connected to the drive motors that respectively helps winding up roller of coiling machine by motor control module, described one-level computer sends motor control module to speed setting value, respectively help the speed of winding up roller by drive motors control, it is characterized in that:
Described second computer comprises hardness rank determination module, thickness rank determination module and temperature rank determination module;
Described coiling machine arrival end is provided with coiling temperature temperature measurer, and the coiling temperature detecting is in real time sent to described temperature rank determination module by described coiling temperature temperature measurer;
Described one-level computer comprises that the leading rate of speed adjusts parameter determination module, the leading rate computing module of speed, and the one the second and the 3rd help winding up roller Speed Setting module;
The leading rate of described speed is adjusted parameter determination module, obtains hardness rank, thickness rank and the temperature rank with steel by second computer, determines the leading rate adjustment of speed parameter, and sends the described leading rate computing module of speed to;
The leading rate computing module of described speed calculates first and helps winding up roller, second to help winding up roller and the 3rd to help the leading rate of speed of winding up roller, and first, second, and third described in sending to respectively helped winding up roller Speed Setting module;
Described first, second, and third helps winding up roller Speed Setting module, according to the leading rate of the speed that respectively helps winding up roller, determine that first helps winding up roller, second to help winding up roller and the 3rd to help the speed setting value of winding up roller, send respectively each to and help the drive motors of winding up roller by motor control module, control respectively first and help winding up roller, second to help winding up roller and the 3rd to help the speed of winding up roller to increase progressively successively, form the ladder speed steadily increasing progressively.
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