CN101332471B - A Dynamic Control Method of Biting Speed of Rolling Mill - Google Patents
A Dynamic Control Method of Biting Speed of Rolling Mill Download PDFInfo
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- CN101332471B CN101332471B CN200810020905XA CN200810020905A CN101332471B CN 101332471 B CN101332471 B CN 101332471B CN 200810020905X A CN200810020905X A CN 200810020905XA CN 200810020905 A CN200810020905 A CN 200810020905A CN 101332471 B CN101332471 B CN 101332471B
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Abstract
The invention relates to a method for controlling biting speed, in particular to a method for dynamically controlling the biting speed of a rolling mill, which comprises the following steps: detecting the roll gap on the operation side and the roll gap on the transmission side of the rolling mill in the rolling process; carrying out average value taking on the detected roll gap on the operation side and the roll gap on the transmission side of the rolling mill to obtain the average value of the roll gaps; according to the corresponding relation between the set biting steel speed and the blank thickness, obtaining the corresponding relation between the biting steel speed and the average value of the roll gap, and obtaining the biting steel speed; transmitting the obtained biting speed to a PLC (programmable logic controller) responsible for controlling main equipment in a rolling mill area; the steel biting speed is transmitted to the upper and lower roller main transmission cabinets through a PLC (programmable logic controller) responsible for the control of main equipment in a rolling mill area, and the upper and lower roller main transmission cabinets control the horizontal speed of the roller according to the steel biting speed. The invention controls the biting speed of the steel plate dynamically, so that the biting speed of the steel plate is more reasonable, the loss of the steel rolling equipment is reduced, and the product quality and the yield are improved.
Description
Technical field
The present invention relates to a kind of control method of biting speed, specifically a kind of kinetic controlling equation method of biting speed of rolling mill.
Background technology
Heavy Plate Plant in present nationwide, the how thick steady state value that all is set at of biting speed of rolling mill blank, but this biting speed of rolling mill establishing method of using always has following defective:
Corresponding biting speed was too fast when 1, blank was thicker, and milling train (plant equipment, hydraulic system and main motor) is impacted greatly, and especially breast roll has bigger damage before and after breaker roll and the milling train, and the probability that send steel rider road generation roll breakage before the machine and behind the machine increases;
Corresponding biting speed was slow excessively when 2, blank was thin, and in this case, steel plate length is generally all longer, and mill speed is slow, thereby the rolling finished product that comes out is increased with the steel plate main body temperature difference end to end, and end product quality reduces; And be unfavorable for improving output;
3, the increase sheet metal is poor with plate, and quality in kind reduces, and lumber recovery is not high;
4, because of biting speed is low, average mill speed is low, and rolling time increases, and influences the output and the performance of enterprises.
This shows that existing biting speed of rolling mill control method can not dynamically be controlled biting speed of rolling mill, affects product quality; Be unfavorable for improving output; And the probability that makes roll, breast roll and send the steel rider road to damage increases, and is unfavorable for reducing cost, and haves much room for improvement.
Summary of the invention
Technical problem to be solved by this invention is: the shortcoming that is set at a steady state value to biting speed of rolling mill in the prior art; A kind of kinetic controlling equation method of biting speed of rolling mill is proposed; This method no longer is set at a steady state value with biting speed of rolling mill; Can improve end product quality through dynamic control biting speed of rolling mill, it is poor with plate to reduce, and improves lumber recovery.
The technical scheme of the above technical problem of solution of the present invention is: through inventor's research; Find in the rolling process; Roll gap and sotck thinkness are basic identical, and both differences are that it is below 10%, because of roll gap is easier to detect; For this reason when dynamically controlling biting speed; The present invention as the control foundation, obtains a kind of kinetic controlling equation method of biting speed of rolling mill with roll gap, and this method comprises the PLC (J-PLC) of milling train operating desk, up-down rollers main transmission cabinet and the control of responsible milling train district main equipment; The milling train operating desk is provided with thickness control system of the rolling mill (HAGC); Thickness control system of the rolling mill (HAGC) carries out data communication with the PLC (J-PLC) of responsible milling train district main equipment control, and thickness control system of the rolling mill (HAGC) comprises position-detection sensor (MTS), Hydrauservo System and electric control system, and this method is carried out the dynamic control of biting speed of rolling mill according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS);
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, obtain the mean value of roll gap;
(3) according to the biting speed of setting and the corresponding relation of sotck thinkness, draw the corresponding relation of biting speed and roll gap mean value, thereby draw biting speed;
(4) biting speed that step (3) is obtained is passed to the PLC (J-PLC) that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC (J-PLC) that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, press the speed of biting speed control roll horizontal direction by up-down rollers main transmission cabinet.
Corresponding relation by biting speed and sotck thinkness: during sotck thinkness>=50mm, biting speed is 1.3m/s; Sotck thinkness is when 12～50mm, and biting speed is 2.0m/s; During sotck thinkness≤12mm, biting speed is 3.0m/s; The corresponding relation that can draw biting speed and roll gap mean value is: during roll gap mean value>=50mm, biting speed is 1.3m/s; Roll gap mean value is when 12～50mm, and biting speed is 2.0m/s; During sotck thinkness≤12mm, biting speed is 3.0m/s.
Advantage of the present invention is: the present invention is through the dynamic biting speed of control steel plate, makes to sting steel and more become rationally, reduces the loss of steel rolling equipment, improves the quality of products raising output.Compare with biting speed commonly used, use the kinetic controlling equation method of biting speed of rolling mill of the present invention after, one ton of excellent special cut deal of every production can fall this more than 10 yuan, every Heavy Plate Production line can fall this more than 10,000,000 by producing 1,000,000 tons of excellent special cut deals.Concrete advantage sees the following form:
Table 1
| Project | Before the present invention implements | After the present invention implements | Advantage |
| End to end with the body temperature difference (is example with 8mm Q345B) | About 150 ℃ | About 100C | Correspondingly be reduced to 0.25mm with the thick difference of body from 0.4mm end to end.Quality and economic indicator all improve. |
| Rolling rhythm (with 12 with lower steel plate, length 30m calculates) | 50 seconds | 47 seconds | Output can improve more than 6%, and because of thin specification (below the 12mm) steel plate production, finishing mill is the weak link of a production line.This some accounts for total output 1/3, by producing 1500000 tons of scales per year, can increase production 30,000 tons. |
| The front and back breast roll changing cycle | 2 months | 3 months | The relevant device maintenance workload reduces, and reduce downtime.Other work roll table fault before and after the milling train also obviously reduces. |
Description of drawings
Fig. 1 is the dynamic control flow chart of biting speed of rolling mill of the present invention.
The specific embodiment
Embodiment one
Present embodiment is dynamically controlled certain medium plate mill's biting speed of rolling mill, and the rolling mill characteristic parameter is following:
1) maximum rolling force 40000KN
2) maximum rolling force square 2 * 1470KN-m
3) main motor 2 * 4200KW; 0～60～145rpm;
4) mill speed 0～2.51～6.45m/s
5) roll maximum opening degree 180mm
6) work roll diameter φ 850/ φ 800mm
7) working roll barrel length 2690mm
8) backing roll diameter phi 1600/ φ 1500mm
9) backing roll barrel length 2590mm
10) on the workroll bearing weight/following 38000/38000Kg
11) on the supporting roller supporting power/following 98000/100000Kg
12) housing screw diameter * pitch S600 * 40mm
13) depress overall ratio i=16.7
14) depress speed 0～20mm/s
15) depress motor: ZZJ818, N=186KW, n=0-435/1100r/min
16) framework pillar section 7790cm2
17) framework window height 6730mm
18) framework window width fore side/transmission side 1640/1635mm
19) rolling absolute altitude+940mm
20) hydraulic cylinder technical specification such as following table:
Table 2
| Sequence number | Title | Piston diameter (mm) | Range (mm) | Operating pressure (MPa) | Quantity |
| 1 | The top backing up roll compensating cylinder | (plunger) φ 340 | 330 | 13/20 | 1 |
| 2 | The top working roll compensating cylinder | (plunger) φ 180 | 260 | 13 | 4 |
| 3 | The bottom working roll compensating cylinder | φ170/φ125 | 170 | 13 | 4 |
| 4 | Roll axle head block plate hydraulic cylinder | φ100/φ50 | 60 | 12 | 8 |
| 7 | Connect the axis clamping hydraulic cylinder | φ140/φ70 | 140 | 12 | 4 |
| 8 | The swing guide hydraulic cylinder | φ180/φ100 | 330 | 12 | 2 |
Equipment mainly comprises the PLC (J-PLC) of machine operation platform, up-down rollers main transmission cabinet and the control of responsible milling train district main equipment; The milling train operating desk is provided with thickness control system of the rolling mill (HAGC); Thickness control system of the rolling mill (HAGC) carries out data communication with the PLC (J-PLC) of responsible milling train district main equipment control; Thickness control system of the rolling mill (HAGC) comprises position-detection sensor (MTS), Hydrauservo System and electric control system; The flow process of biting speed of rolling mill kinetic controlling equation method of the present invention is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 60mm, and milling train transmission side roll gap is 40mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 50mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: during roll gap mean value >=50mm, biting speed is 1.3m/s, and drawing biting speed is 1.3m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 1.3m/s.
Embodiment two
The milling train of present embodiment is identical with embodiment one, and the flow process of biting speed of rolling mill kinetic controlling equation method is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 65mm, and milling train transmission side roll gap is 55mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 60mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: during roll gap mean value >=50mm, biting speed is 1.3m/s, and drawing biting speed is 1.3m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 1.3m/s.
Embodiment three
The milling train of present embodiment is identical with embodiment one, and the flow process of biting speed of rolling mill kinetic controlling equation method is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 25mm, and milling train transmission side roll gap is 35mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 30mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: roll gap mean value is when 12～50mm, and biting speed is 2.0m/s, and drawing biting speed is 2.0m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 2.0m/s.
Embodiment four
The milling train of present embodiment is identical with embodiment one, and the flow process of biting speed of rolling mill kinetic controlling equation method is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 12mm, and milling train transmission side roll gap is 18mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 15mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: roll gap mean value is when 12～50mm, and biting speed is 2.0m/s, and drawing biting speed is 2.0m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 2.0m/s.
Embodiment five
The milling train of present embodiment is identical with embodiment one, and the flow process of biting speed of rolling mill kinetic controlling equation method is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 12mm, and milling train transmission side roll gap is 18mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 15mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: roll gap mean value is when 12～50mm, and biting speed is 2.0m/s, and drawing biting speed is 2.0m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 2.0m/s.
Embodiment six
The milling train of present embodiment is identical with embodiment one, and the flow process of biting speed of rolling mill kinetic controlling equation method is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 11mm, and milling train transmission side roll gap is 13mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 12mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: roll gap mean value is when≤12mm, and biting speed is 3.0m/s, and drawing biting speed is 3.0m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 3.0m/s.
Embodiment seven
The milling train of present embodiment is identical with embodiment one, and the flow process of biting speed of rolling mill kinetic controlling equation method is as shown in Figure 1, carries out according to the following steps:
(1) thickness control system of the rolling mill (HAGC) detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor (MTS), and obtaining milling train fore side roll gap is 5mm, and milling train transmission side roll gap is 7mm;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, the mean value that obtains roll gap is 6mm;
(3) according to the biting speed of setting and the corresponding relation of roll gap mean value: roll gap mean value is when≤12mm, and biting speed is 3.0m/s, and drawing biting speed is 3.0m/s;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, the speed of controlling the roll horizontal direction by biting speed by up-down rollers main transmission cabinet is 3.0m/s.
The present invention can also have other embodiment, and the corresponding relation of biting speed and sotck thinkness is different and different because of milling train, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of requirement protection of the present invention.
Claims (1)
1. the kinetic controlling equation method of a biting speed of rolling mill; The PLC that comprises milling train operating desk, up-down rollers main transmission cabinet and the control of responsible milling train district main equipment; The milling train operating desk is provided with thickness control system of the rolling mill; The PLC of thickness control system of the rolling mill and the control of responsible milling train district main equipment carries out data communication, and thickness control system of the rolling mill comprises position-detection sensor, Hydrauservo System and electric control system, it is characterized in that: carry out the dynamic control of biting speed of rolling mill according to the following steps:
(1) thickness control system of the rolling mill detects milling train fore side roll gap and transmission side roll gap in the operation of rolling in real time through position-detection sensor;
(2) step (1) detected milling train fore side roll gap and transmission side roll gap are averaged value, obtain the mean value of roll gap;
(3) according to the biting speed of setting and the corresponding relation of sotck thinkness, draw the corresponding relation of biting speed and roll gap mean value, thereby draw biting speed;
(4) biting speed that step (3) is obtained is passed to the PLC that is responsible for the main equipment control of milling train district through the data communication circuit;
(5) through the PLC that is responsible for the main equipment control of milling train district biting speed is passed to up-down rollers main transmission cabinet, press the speed of biting speed control roll horizontal direction by up-down rollers main transmission cabinet;
In the said step (3), the corresponding relation of biting speed and sotck thinkness:
During sotck thinkness >=50mm, biting speed is 1.3m/s;
Sotck thinkness is when 12～50mm, and biting speed is 2.0m/s;
During sotck thinkness≤12mm, biting speed is 3.0m/s,
The corresponding relation that draws biting speed and roll gap mean value is:
During roll gap mean value >=50mm, biting speed is 1.3m/s;
Roll gap mean value is when 12～50mm, and biting speed is 2.0m/s;
During sotck thinkness≤12mm, biting speed is 3.0m/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810020905XA CN101332471B (en) | 2008-07-31 | 2008-07-31 | A Dynamic Control Method of Biting Speed of Rolling Mill |
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|---|---|---|---|
| CN200810020905XA CN101332471B (en) | 2008-07-31 | 2008-07-31 | A Dynamic Control Method of Biting Speed of Rolling Mill |
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| CN101332471B true CN101332471B (en) | 2012-05-02 |
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| CN102120224B (en) * | 2010-01-08 | 2012-10-10 | 宝山钢铁股份有限公司 | Control method of automatic deviation correction during rolling of hot continuous rolling mill |
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| CN104668292A (en) * | 2013-11-29 | 2015-06-03 | 合肥神马科技集团有限公司 | Rolling mill |
| CN104668293A (en) * | 2013-11-29 | 2015-06-03 | 合肥神马科技集团有限公司 | Rolling mill |
| CN107597853B (en) * | 2017-07-19 | 2020-06-12 | 舞阳钢铁有限责任公司 | Method for optimizing and configuring rolling pressure |
| CN112238145B (en) * | 2019-07-19 | 2022-09-02 | 北京宇轩智能科技有限公司 | Intelligent steel rolling mill accurate steel biting signal processing method |
| CN113333475A (en) * | 2021-06-30 | 2021-09-03 | 南京钢铁股份有限公司 | Method for reducing impact of steel biting of roller |
| CN115213237B (en) * | 2022-06-06 | 2024-12-03 | 阳春新钢铁有限责任公司 | A control system and method for preventing rough rolling from biting steel and tripping of front roller table |
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Patent Citations (5)
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| JPS56128602A (en) | 1980-03-14 | 1981-10-08 | Sumitomo Metal Ind Ltd | Cold rolling method for steel sheet |
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