CN112742879A - Control method for camber of medium plate - Google Patents
Control method for camber of medium plate Download PDFInfo
- Publication number
- CN112742879A CN112742879A CN202110000908.2A CN202110000908A CN112742879A CN 112742879 A CN112742879 A CN 112742879A CN 202110000908 A CN202110000908 A CN 202110000908A CN 112742879 A CN112742879 A CN 112742879A
- Authority
- CN
- China
- Prior art keywords
- camber
- rolling
- control method
- inclination
- medium plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
Abstract
The invention relates to a control method for camber of a medium plate, which comprises the following specific steps: firstly, calculating the deviation delta of the predicted bounce value of the operation side and the transmission side of each rolling pass according to a rolling schedule table and the rigidity measurement curves of two sides of a rolling mill; then classifying and setting gain coefficient K according to the specification of the finished product and rolling pass1、K2And K3(ii) a Then calculating the pass automatic adjustment inclination amount; and finally, applying the adjusted inclination amount to the set values of the hydraulic cylinders on the operation side and the transmission side before biting steel, and adjusting the inclination of the roll gap. The invention has the advantages that the strip shape of the rolling mill can be automatically and dynamically adjusted, the occurrence of the camber condition is reduced, the labor intensity of operators is reduced, and the strip shape quality is improved.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a control method for camber of a medium plate.
Background
In the reciprocating rolling process of the finishing mill, due to the reasons of large rigidity deviation of two sides of the rolling mill, irregular shape of supplied materials, large temperature deviation of two sides, large thickness deviation of two sides and the like, camber can occur to front and rear plate shapes, namely some inward camber and some outward camber, and sometimes the front and rear are crossed.
In order to correct the strip shape, the operator performs manual adjustment of the inclination, sometimes due to a lag or overshoot of the manual adjustment, or even the S-turn, causing the rolling to be terminated or the quick-release rolling to be unplanned.
Disclosure of Invention
The invention aims to solve the problems that camber is easy to occur in the shape of the traditional rolling mill and the treatment efficiency is low, and provides a control method for the camber of a medium plate, which can automatically and dynamically adjust the shape of the rolling mill, reduce the labor intensity of operators and improve the shape quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for camber of a medium plate comprises the following specific steps:
the method comprises the following steps: calculating the deviation delta of the predicted bounce value of the operation side and the transmission side of each rolling pass according to the rolling schedule table and the rigidity measurement curves of the two sides of the rolling mill;
step two: classifying and setting gain coefficient K according to finished product specification and rolling pass1、K2And K3；
Step three: calculating the pass automatic adjustment inclination amount;
step four: the roll gap inclination is adjusted by applying the adjusted inclination amount to the set values of the hydraulic cylinders on the operation side and the transmission side before biting steel.
Furthermore, in the first step, the calculation of the predicted bounce value is obtained according to the existing bounce value calculation program, and the program mainly utilizes a rolling schedule table and rigidity measurement curves at two sides of the rolling mill to carry out calculation.
Further, in the second step, the setting of the gain factor is obtained according to the specific debugging result.
Further, in the third step, when the rolling mill rotates forwards, the inclination dynamic adjustment amount is K1*K3*Δ。
Further, in the third step, when the rolling mill is reversed, the inclination dynamic adjustment amount is K2*K3*Δ。
Furthermore, in the fourth step, the set value of the hydraulic cylinder at the transmission side is the sum of the preset value of the hydraulic cylinder at the transmission side and the dynamic adjustment quantity of the inclination.
Further, in the fourth step, the set value of the hydraulic cylinder at the operation side is the difference between the preset value of the hydraulic cylinder at the operation side and the dynamic adjustment amount of the inclination.
In the technical scheme of the invention, better plate shape can be obtained by carrying out system control on the regulating quantity, the width of a steel plate can be reduced by 0.1% in an unplanned manner, the fault time caused by camber can be reduced by 20 minutes on average per month, the method is suitable for automatic steel rolling of a medium plate mill, the plate shape of the mill can be automatically and dynamically regulated, the labor intensity of operators is reduced, and the plate shape quality is improved.
Drawings
FIG. 1 is a logic flow chart of a control method for camber of a medium plate according to the present invention.
Detailed Description
Example 1
In order to make the present invention more clear, the following further describes a control method for the camber of a medium plate of the present invention, and the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Taking the dynamic control of the shape of a finishing mill in a middle plate factory as an example, the performance parameters of the mill are as follows:
(1) maximum rolling force: 40000 kN;
(2) maximum rolling moment: 2X 1470 kN.m;
(3) a main motor: 2 × 4200 kW; 0 to 60 to 145 rpm;
(4) rolling speed: 0 to 2.51 to 6.45 m/s;
(5) maximum roll opening degree: 180 mm;
(6) diameter of the working roll: phi 850/phi 800 mm;
(7) length of work roll body: 2690 mm;
(8) diameter of the supporting roller: phi 1600/phi 1500 mm;
(9) length of the supporting roll body: 2590 mm;
(10) the bearing capacity of the working roll shaft is up/down: 38000/38000 kg;
(11) bearing capacity of the supporting roll shaft is up/down: 98000/100000 kg;
(12) screw diameter × pitch: s600 multiplied by 40 mm;
(13) the total reduction ratio is: i = 16.7;
(14) pressing speed: 0-20 mm/s;
(15) pressing down a motor: ZZJ818, N =186kW, N =0-435/1100 r/min;
(16) the section of the stand column of the frame: 7790 cm2；
(17) Height of the frame window: 6730 mm;
(18) frame window width operating side/drive side: 1640/1635 mm;
(19) rolling elevation: +940 mm.
The technical specifications of the hydraulic cylinder are as follows:
as shown in fig. 1, H is the rolled product thickness; h1~H3To divide the thickness; sDSSetting a position value of a hydraulic cylinder at the transmission side; sOSSetting a position value of the hydraulic cylinder at the operation side; s is a dynamic inclination adjustment quantity; sDS0The position preset value of the hydraulic cylinder at the transmission side is obtained; sOS0The position preset value of the hydraulic cylinder at the operation side is obtained; k1Is a gain factor of 1; k2Is a gain factor of 2; k3Is a gain factor of 3.
According to the logic diagram shown in fig. 1, the control of the camber of the medium plate can be completed, and the method comprises the following specific steps:
the method comprises the following steps: calculating the deviation delta of the predicted bounce value of the operation side and the transmission side of each rolling pass according to the rolling schedule table and the rigidity measurement curves of the two sides of the rolling mill;
step two: classifying and setting gain coefficient K according to finished product specification and rolling pass1、K2And K3；
Step three: calculating the pass automatic adjustment inclination amount;
step four: the roll gap inclination is adjusted by applying the adjusted inclination amount to the set values of the hydraulic cylinders on the operation side and the transmission side before biting steel.
In the invention, the calculation of the bounce value is obtained by a set of existing programs through a rolling schedule table and rigidity measurement curves at two sides of a rolling mill, the gain coefficient is obtained according to a debugging result, the quality of the plate shape can be accurately controlled by applying all the parameters in a logic diagram, a better plate shape is obtained, the width of a steel plate can be reduced by 0.1% in an unplanned manner, the fault time caused by camber is reduced by 20 minutes on average in a month, the method is suitable for automatic steel rolling of a medium plate rolling mill, the plate shape of the rolling mill can be automatically and dynamically adjusted, the labor intensity of operators is reduced, the plate shape quality is improved, and the annual production is effective and benefits about 250 ten thousand yuan.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. A control method for camber of a medium plate comprises the following specific steps, and is characterized by comprising the following steps:
the method comprises the following steps: calculating the deviation delta of the predicted bounce value of the operation side and the transmission side of each rolling pass according to the rolling schedule table and the rigidity measurement curves of the two sides of the rolling mill;
step two: classifying and setting gain coefficient K according to finished product specification and rolling pass1、K2And K3；
Step three: calculating the pass automatic adjustment inclination amount;
step four: the roll gap inclination is adjusted by applying the adjusted inclination amount to the set values of the hydraulic cylinders on the operation side and the transmission side before biting steel.
2. The control method for camber of a medium plate according to claim 1, wherein:
in the first step, the calculation of the predicted bounce value is obtained according to the existing bounce value calculation program, and the program mainly utilizes a rolling schedule table and rigidity measurement curves at two sides of the rolling mill to calculate.
3. The control method for camber of a medium plate according to claim 1 or 2, wherein:
in the second step, the setting of the gain coefficient is obtained according to the specific debugging result.
4. The control method for camber of a medium plate according to claim 1 or 2, wherein:
in the third step, when the rolling mill rotates forwards, the inclination dynamic adjustment amount is K1*K3*Δ。
5. The control method for camber of a medium plate according to claim 1 or 2, wherein:
in the third step, when the rolling mill rotates reversely, the inclination dynamic adjustment amount is K2*K3*Δ。
6. The control method for camber of a medium plate according to claim 1 or 2, wherein:
in the fourth step, the set value of the hydraulic cylinder at the transmission side is the sum of the preset value of the hydraulic cylinder at the transmission side and the dynamic inclination adjustment quantity.
7. The control method for camber of a medium plate according to claim 1 or 2, wherein:
in the fourth step, the set value of the hydraulic cylinder at the operation side is the difference between the preset value of the hydraulic cylinder at the operation side and the dynamic adjustment quantity of the inclination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110000908.2A CN112742879B (en) | 2021-01-04 | 2021-01-04 | Control method for camber of medium plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110000908.2A CN112742879B (en) | 2021-01-04 | 2021-01-04 | Control method for camber of medium plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112742879A true CN112742879A (en) | 2021-05-04 |
| CN112742879B CN112742879B (en) | 2022-08-19 |
Family
ID=75649639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110000908.2A Active CN112742879B (en) | 2021-01-04 | 2021-01-04 | Control method for camber of medium plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112742879B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252358A (en) * | 2013-05-21 | 2013-08-21 | 东北大学 | Correction method of wide and thick plate camber |
| CN103752623A (en) * | 2013-12-27 | 2014-04-30 | 首钢总公司 | Automatic control method for improving camber of rough mill intermediate billet |
| CN104668294A (en) * | 2013-11-28 | 2015-06-03 | 上海梅山钢铁股份有限公司 | Dynamic constant thickness ratio taper control method |
| CN106984652A (en) * | 2016-01-21 | 2017-07-28 | 宝山钢铁股份有限公司 | The method that finishing stand sideslip is controlled according to breakdown bar camber |
| CN109622632A (en) * | 2018-12-18 | 2019-04-16 | 北京科技大学 | A kind of hot-rolled intermediate billet camber control method |
| CN111530940A (en) * | 2020-05-09 | 2020-08-14 | 河钢股份有限公司承德分公司 | Steel rolling drift automatic adjusting method based on bounce theory |
-
2021
- 2021-01-04 CN CN202110000908.2A patent/CN112742879B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252358A (en) * | 2013-05-21 | 2013-08-21 | 东北大学 | Correction method of wide and thick plate camber |
| CN104668294A (en) * | 2013-11-28 | 2015-06-03 | 上海梅山钢铁股份有限公司 | Dynamic constant thickness ratio taper control method |
| CN103752623A (en) * | 2013-12-27 | 2014-04-30 | 首钢总公司 | Automatic control method for improving camber of rough mill intermediate billet |
| CN106984652A (en) * | 2016-01-21 | 2017-07-28 | 宝山钢铁股份有限公司 | The method that finishing stand sideslip is controlled according to breakdown bar camber |
| CN109622632A (en) * | 2018-12-18 | 2019-04-16 | 北京科技大学 | A kind of hot-rolled intermediate billet camber control method |
| CN111530940A (en) * | 2020-05-09 | 2020-08-14 | 河钢股份有限公司承德分公司 | Steel rolling drift automatic adjusting method based on bounce theory |
Non-Patent Citations (3)
| Title |
|---|
| 杜平等: "中厚板轧制过程消除侧弯的两侧辊缝在线调整模型", 《冶金自动化》 * |
| 王君等: "中厚板轧机液压辊缝控制系统研究及其PLC实现", 《东北大学学报(自然科学版)》 * |
| 王海玉等: "粗轧板坯镰刀弯控制模型的研究与应用", 《工程科学学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112742879B (en) | 2022-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6260162B2 (en) | ||
| CN102921740A (en) | Method for controlling width deviation of head and tail of hot rolled strip | |
| CN112742879B (en) | Control method for camber of medium plate | |
| CN113361179B (en) | Corner rolling full load regulation distribution method for heavy and medium plate mill | |
| CN101422785B (en) | Method for adjusting middle-roller drunkenness in double cold reduction shadow-mask strip-steel machine | |
| CA2570865A1 (en) | Method for rolling strips in a rolling stand | |
| CN1887463A (en) | Feed forward control method for wall thickness of tension reducing machine | |
| CN112958633B (en) | Incoming material camber-based fine rolling strip steel head pre-swing leveling control method | |
| RU2281817C1 (en) | Metallic strip continuous rolling method (varints) | |
| CN110711771B (en) | Control method for correcting strip steel deviation based on finish rolling vertical roll | |
| CN105127211B (en) | Method and device for horizontal profiling correction of metal plate strip | |
| CN116756874A (en) | Method for establishing plate and strip rolling process expansion model by adopting angle rolling | |
| WO2007137739A2 (en) | Method and device for producing a metal strip by continuous casting | |
| KR20180013905A (en) | Method for the stepped rolling of a metal strip | |
| CN111360082A (en) | Method for distributing rolling reduction in case of lack of five-stand cold continuous rolling | |
| CN210730537U (en) | On-line monitoring and automatic adjusting device for strip rolling | |
| CN111299325B (en) | Control method and equipment for cold-formed steel plate cutting warping defect | |
| EP1080800B1 (en) | Method for flexibly rolling a metal strip | |
| CN211135122U (en) | Gap-adjustable non-ferrous metal rolling device | |
| CN110508623B (en) | Control method for inhibiting oscillation of finishing elongation rate | |
| CN113857297A (en) | Method and system for controlling plate shape of straightening machine | |
| CN110227721B (en) | Control method for roll gap of rolling mill in speed change process | |
| CN113146264A (en) | Arc channel steel production equipment | |
| CN1504277A (en) | Process for rolling H steel using trio mill and heat rectification machine | |
| CN111014291A (en) | Control method for rolling model of cold-rolled thin strip steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |