CN101332471A - Dynamic control method of biting speed of rolling mill - Google Patents

Dynamic control method of biting speed of rolling mill Download PDF

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Publication number
CN101332471A
CN101332471A CNA200810020905XA CN200810020905A CN101332471A CN 101332471 A CN101332471 A CN 101332471A CN A200810020905X A CNA200810020905X A CN A200810020905XA CN 200810020905 A CN200810020905 A CN 200810020905A CN 101332471 A CN101332471 A CN 101332471A
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CN
China
Prior art keywords
biting speed
speed
biting
roll gap
rolling mill
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CNA200810020905XA
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Chinese (zh)
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CN101332471B (en
Inventor
廖仕军
赵桂琴
华军强
杨海涛
石小军
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南京钢铁股份有限公司
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Priority to CN200810020905XA priority Critical patent/CN101332471B/en
Publication of CN101332471A publication Critical patent/CN101332471A/en
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Publication of CN101332471B publication Critical patent/CN101332471B/en

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Abstract

The invention relates to a control method of biting steel speed, in particular to a dynamic control method of the biting steel speed of a rolling mill. The control method is carried out as the following steps: the roll gaps at the operating and driving sides of the rolling mill in the rolling process are measured; the measured values of the roll gaps at the operating and drive sides of the rolling mill are averaged to obtain an average value of roll gaps; a corresponding relation between the biting steel speed and the average value of roll gaps is obtained according to the corresponding relation between a stated biting steel speed and the stock thickness, thus obtaining the biting steel speed; the obtained biting speed is sent to a PLC which is responsible for controlling a main device in the rolling mill zone; the biting steel speed is sent to main drive cabinets of the upper and the lower rolls by the PLC which is responsible for controlling the main device in the rolling mill zone, the horizontal speed of the roll is controlled by the main drive cabinets of the upper and the lower rolls according to the biting steel speed. By dynamically controlling the biting steel speed of a steel plate, the control method of the biting steel speed has the advantages that the biting steel is more reasonable, the loss of the steel rolling device is reduced, and the product quality and output are improved.

Description

A kind of kinetic controlling equation method of biting speed of rolling mill
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 at 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 biting speed of rolling mill one steady state value, can improve end product quality by dynamic control biting speed of rolling mill, reduction is poor with plate, 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, 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 with roll gap as control foundation, obtain a kind of kinetic controlling equation method of biting speed of rolling mill, this method comprises the milling train operating desk, the PLC (J-PLC) of 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, this method are 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 by 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 by the data communication circuit;
(5) by 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 by 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 invention process After the invention process Advantage
End to end with the body temperature difference (is example with 8mm Q345B) About 150 ℃ About 100 ℃ 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 (12mm is following) 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 as follows:
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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 carried out as shown in Figure 1 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 by 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 by the data communication circuit;
(5) by 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 all employings are equal replaces or technical scheme that equivalent transformation forms, all drops within the scope of protection of present invention.

Claims (2)

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, 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 by 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 by the data communication circuit;
(5) by 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.
2. the kinetic controlling equation method of biting speed of rolling mill as claimed in claim 1 is characterized in that: in the described step (3), by 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.
CN200810020905XA 2008-07-31 2008-07-31 Dynamic control method of biting speed of rolling mill CN101332471B (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102527735A (en) * 2011-12-23 2012-07-04 秦皇岛首秦金属材料有限公司 Method for controlling even deformation of edge portion in medium-thick board rolling
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
CN103537750A (en) * 2012-07-17 2014-01-29 宝山钢铁股份有限公司 Cutting control method for rolling-cutting type bilateral scissors
CN104668293A (en) * 2013-11-29 2015-06-03 合肥神马科技集团有限公司 Rolling mill
CN104668292A (en) * 2013-11-29 2015-06-03 合肥神马科技集团有限公司 Rolling mill
CN107597853A (en) * 2017-07-19 2018-01-19 舞阳钢铁有限责任公司 A kind of method for distributing nip pressure rationally

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2762905Y (en) * 2004-10-26 2006-03-08 北京欧拓普科技有限公司 System for controlling hydraulic pressing position of rolling mill
CN101069897A (en) * 2007-06-15 2007-11-14 中国第一重型机械集团公司 Reversable cold-rolling machine lifting-speed thickness compensation control method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102527735A (en) * 2011-12-23 2012-07-04 秦皇岛首秦金属材料有限公司 Method for controlling even deformation of edge portion in medium-thick board rolling
CN103537750A (en) * 2012-07-17 2014-01-29 宝山钢铁股份有限公司 Cutting control method for rolling-cutting type bilateral scissors
CN103537750B (en) * 2012-07-17 2016-08-24 宝山钢铁股份有限公司 A kind of Cutting control method for rolling-cutting type bilateral scissors
CN104668293A (en) * 2013-11-29 2015-06-03 合肥神马科技集团有限公司 Rolling mill
CN104668292A (en) * 2013-11-29 2015-06-03 合肥神马科技集团有限公司 Rolling mill
CN107597853A (en) * 2017-07-19 2018-01-19 舞阳钢铁有限责任公司 A kind of method for distributing nip pressure rationally
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

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