CN102266870A - Method for starting finishing mill set of broad hot strips - Google Patents
Method for starting finishing mill set of broad hot strips Download PDFInfo
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- CN102266870A CN102266870A CN2011101970887A CN201110197088A CN102266870A CN 102266870 A CN102266870 A CN 102266870A CN 2011101970887 A CN2011101970887 A CN 2011101970887A CN 201110197088 A CN201110197088 A CN 201110197088A CN 102266870 A CN102266870 A CN 102266870A
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Abstract
The invention discloses a method for starting a finishing mill set of broad hot strips, and the method comprises the following steps: controlling hydraulic cylinders of rolling mills of the finishing mill set to statically press, thereby supplying static pressures between working rollers and support rollers of the rolling mills; when the static pressures reach a preset value, controlling the hydraulic cylinders of the rolling mills to stop pressing; and then normally starting. According to the method provided by the invention, the static pressures between working rollers and support rollers before the finishing mill set are started are increased, thereby improving the starting condition of the rolling mills, overcoming the defect of insufficient driving power on the support rollers from the working rollers, and efficiently avoiding serious facility accidents, such as roller scratches, and the like.
Description
Technical field
The invention belongs to metallurgical hot rolling technical field, relate to a kind of startup method that is applicable to the mm finishing mill unit of broad hot strip.
Background technology
The startup method that is used for the mm finishing mill unit of broad hot strip is normally carried out under the pattern of zero load, detailed process is as follows: by opening the car button on operative employee's push panel, each rolling mill of mm finishing mill unit starts, speed is elevated to creep speed (normally 0.2m/s) gradually by zero, the operative employee presses once more and opens the car button then, and rolling mill speed rises to artificial setting speed or acyclic homologically trioial speed.
Because opening car is to carry out under the situation of zero load, so only depend on the equilibrant force of working roll to contact between working roll and the backing roll.Therefore, car is opened in zero load may be because of the drive deficiency of working roll to backing roll, (this oil film is in supporting roller bearing and for closed state to be unfavorable for the backing roll oil film, can not flow to belt steel surface) formation, produce relative slip between the phenomenon that occurs the motionless backing roll of work roller strap easily, working roll and backing roll, thereby the substantial equipment accident such as chew between generation backing roll and the working roll mutually, cause significantly additionally increasing of roll dressing amount simultaneously, thereby greatly reduce the service life of roll.
Summary of the invention
In order to solve in the prior art because the problem that startup causes under idle mode the invention provides a kind of startup method that is applicable to the broad hot strip mm finishing mill unit.According to the present invention, open the static pressure between the working roll and backing roll before the car by increasing mm finishing mill unit, can improve the entry condition of milling train, overcome working roll backing roll is driven hypodynamic drawback, thereby effectively avoid the generation of substantial equipment accidents such as roll chews.
The invention provides a kind of startup method of mm finishing mill unit of broad hot strip, said method comprising the steps of: the hydraulic cylinder of each rolling mill of control mm finishing mill unit carries out static pressure and leans on, so that have static pressure between the working roll of each rolling mill and the backing roll; Reach when setting value when detecting static pressure, the hydraulic cylinder of controlling each rolling mill stops to press, and starts normally then.
According to one embodiment of present invention, described hydraulic cylinder can be a roll gap master cylinder automatically.
According to one embodiment of present invention, describedly carry out normal setting up procedure and can comprise: the main transmission of each rolling mill of control mm finishing mill unit rises to the acyclic homologically trioial speed or the artificial setting speed of each rolling mill with certain acceleration, thereby makes each rolling mill band of mm finishing mill unit pressure-activated.
The piezomagnetic pressure head of lower support roll bearing seat below that according to one embodiment of present invention, can be by being arranged on each milling train come the pressure between testing roller and the backing roll.
According to one embodiment of present invention, the setting value of static pressure can be in 170 tons～220 tons scope.According to a preferred embodiment of the present invention, the setting value of static pressure can be 200 tons.
According to one embodiment of present invention, can realize that the static pressure of each rolling mill of mm finishing mill unit leans on by in the control module of mm finishing mill unit, adding " light pressure opens car " program.
Description of drawings
Fig. 1 is the layout schematic diagram according to mm finishing mill unit piezomagnetic pressure head of the present invention.
The acyclic homologically trioial that Fig. 2 shows the mm finishing mill unit according to the present invention opens the schematic diagram of car picture.
The specific embodiment
When broad hot strip, under idle mode, start mm finishing mill unit usually, but easy like this making produces relative slip between working roll and the backing roll, thereby the substantial equipment accident such as chew between generation backing roll and the working roll mutually.To this, the invention provides a kind of with the light pressure-activated method that is used for the mm finishing mill unit of broad hot strip, to avoid the generation of substantial equipment accidents such as roll chews.
Describe the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 shows the layout according to the piezomagnetic pressure head of mm finishing mill unit of the present invention.As shown in Figure 1, band steel 4 passes two working rolls 2 to be rolled, and upper support roller 1 and lower support roller 1 are supported top working roll 2 and bottom working roll 2 respectively.Piezomagnetic pressure head 3 is arranged in the groove of bearing block below of lower support roller 1, is used for static pressure between testing roller and the backing roll.
According to the present invention, by being carried out roll gap, depresses each rolling mill of mm finishing mill unit, when pressure acquires a certain degree, start the mm finishing mill unit main transmission.Specifically, according to the present invention, the startup method of the mm finishing mill unit of broad hot strip comprises: the hydraulic cylinder of each rolling mill of control mm finishing mill unit carries out static pressure and leans on, so that have static pressure between the working roll of milling train and the backing roll; When piezomagnetic pressure head 3 detected static pressure between working roll and the backing roll and reaches setting value, the hydraulic cylinder of controlling each rolling mill stopped to press, and starts normally then.
Specifically, at first, the mm finishing mill unit that is used for broad hot strip need start under the situation that all entry conditions (also can be called " opening spoke spare ") of assurance all possess again.Here, entry condition comprises that the main transmission signal is ready, hydraulic pressure signal is normal, the input of roll diameter of roller roll shape information is normal etc.
Then, can utilize the hydraulic cylinder of each rolling mill of mm finishing mill unit to carry out static pressure automatically and lean on, so that reach certain static pressure between working roll and the backing roll, gently pressure-activated to realize.Reach setting value when the piezomagnetic pressure head 3 that is arranged on lower support roller 2 belows detects pressure) time, the control hydraulic cylinder stops to press.According to one embodiment of present invention, can adopt the hydraulic cylinder of AGC (roll gap control automatically) cylinder as each rolling mill of mm finishing mill unit.For example, can adopt model is the AGC cylinder of RHN0150MP071S1G6100.According to another embodiment of the present invention, can adopt model is the piezomagnetic pressure head of SLC1750.In one embodiment of the invention, setting value can be in 170 tons～No. 220 scope, and in a preferred embodiment, setting value is 200 tons (T).
Then, the main transmission of each rolling mill of control mm finishing mill unit is with relatively-stationary acceleration (for example, 2m/s
2) open car automatically, and rise to acyclic homologically trioial speed or setting speed, open car thereby finish milling train band pressure.Here, acyclic homologically trioial speed is meant to be stipulated in automated procedures, guarantees the needed fixed speed of milling train automatic acyclic homologically trioial precision.
The startup that it will be understood by those skilled in the art that common milling train is controlled by automated procedures.Therefore,, can in finish rolling main transmission control module, increase " light pressure opens car " program according to the present invention, and open setting on the car picture " light pressure opens car " dialog box, and carry out the program module link in the finish rolling acyclic homologically trioial.Rational force value is set in this program, and breaker roll did not cause impression to be advisable when the size of force value was leaned on the assurance static pressure.
Come to describe in further detail the startup method that is used for the broad hot strip mm finishing mill unit of the present invention below in conjunction with specific embodiments.
After the mm finishing mill unit that is used for broad hot strip possesses the required full terms of startup, carry out following operation:
1) the click acyclic homologically trioial opens " light pressure the opens car " dialog box (as shown in Figure 2) on the car picture, thereby the AGC cylinder of each rolling mill of mm finishing mill unit carries out static pressure automatically to be leaned on, when piezomagnetic pressure head detected pressures reached 200T, the AGC cylinder stopped to press (procedure auto-control) automatically;
2) the click acyclic homologically trioial opens " the automatic acyclic homologically trioial request of the F1-6 " dialog box (as shown in Figure 2) on the car picture, selects acyclic homologically trioial speed to start.Here, " the automatic acyclic homologically trioial request of F1-6 " is the affirmation that auto zero speed governing degree is selected, and clicks this dialog box, and then dialog box changes color (as becoming green), and auto zero speed governing degree is selected to drop into; Click this dialog box once more, the former background color of dialog box color restoration (as grey) then, auto zero speed governing degree are selected to abandon;
3) milling train main transmission is with 2m/s
2Acceleration open car automatically and rise to each rolling mill acyclic homologically trioial speed (F1～F6 acyclic homologically trioial speed: 90,120,150,210,210,210, unit: rice/minute), open the car function thereby finish.
After the mm finishing mill unit that is used for broad hot strip possesses the required full terms of startup, carry out following operation:
1) click acyclic homologically trioial and open " light pressure opens car " button (as shown in Figure 2) on the car picture, lean on thereby the AGC cylinder of each rolling mill of mm finishing mill unit carries out static pressure automatically, when pressing magnetic instrument detected pressures to reach 200T when above, the AGC cylinder stops to press automatically;
2) in semi-automatic picture, manually carry out speed and set;
3) main transmission of control milling train is with 2m/s
2Acceleration open car automatically and rise to artificial setting speed (F1～F6 acyclic homologically trioial speed: 104,150,197,245,301,354, unit: rice/minute), open the car function thereby finish.
Therefore, compare, the invention has the advantages that with the method that under idle mode, starts the mm finishing mill unit of broad hot strip according to prior art:
1) the present invention carried out static pressure earlier and leans on before the broad hot strip mm finishing mill unit normally opens car, when pressing pressure and reach predetermined value (for example, the arbitrary numerical value in 170 tons～220 tons scope), carried out speed just now and started, and had realized that light pressure opens car;
2) the static pressure depended on pressure selected of the present invention is of moderate size, and has both guaranteed good contact the between working roll and the backing roll, and the excessive breaker roll of unlikely again pressure causes impression;
3) click " light pressure opens car " and change over to automatically and open range of driving preface, realized a key operation, can guarantee the stable smooth operation produced, and easy to be reliable;
4) the present invention can avoid the generation of the accident that chews between working roll and the backing roll effectively, has improved the security and stability that mm finishing mill unit opens car.
Therefore, the present invention opens car by making mm finishing mill unit under the state that has the certain pressure load, improved the entry condition of each rolling mill of mm finishing mill unit, overcome working roll backing roll has been driven hypodynamic drawback, thereby effectively avoided the generation of substantial equipment accidents such as roll chews, improved the security and stability that mm finishing mill unit opens the car acyclic homologically trioial greatly.Facts have proved, the method according to this invention, stable smooth operation, easy to be reliable.
Claims (7)
1. the startup method of the mm finishing mill unit of a broad hot strip is characterized in that said method comprising the steps of:
The hydraulic cylinder of each rolling mill of control mm finishing mill unit carries out static pressure and leans on, so that have static pressure between the working roll of each rolling mill and the backing roll;
Reach when setting value when detecting static pressure, the hydraulic cylinder of controlling each rolling mill stops to press, and starts normally then.
2. startup method as claimed in claim 1 is characterized in that described hydraulic cylinder is automatic roll gap master cylinder.
3. startup method as claimed in claim 1, it is characterized in that describedly carrying out normal setting up procedure and comprising: the main transmission of each rolling mill of control mm finishing mill unit rises to the acyclic homologically trioial speed or the artificial setting speed of each rolling mill with certain acceleration, thereby makes each rolling mill band of mm finishing mill unit pressure-activated.
4. startup method as claimed in claim 1, the piezomagnetic pressure head that it is characterized in that the bearing block below of the lower support roller by being arranged on each milling train comes the pressure between testing roller and the backing roll.
5. startup method as claimed in claim 1, the setting value that it is characterized in that static pressure is in 170 tons～220 tons scope.
6. startup method as claimed in claim 1, the setting value that it is characterized in that static pressure is 200 tons.
7. startup method as claimed in claim 1 is characterized in that realizing that by add " light pressure opens car " program in the control module of mm finishing mill unit the static pressure of each rolling mill of mm finishing mill unit leans on.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101970887A CN102266870A (en) | 2011-07-14 | 2011-07-14 | Method for starting finishing mill set of broad hot strips |
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| CN2011101970887A CN102266870A (en) | 2011-07-14 | 2011-07-14 | Method for starting finishing mill set of broad hot strips |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894482A (en) * | 2019-02-28 | 2019-06-18 | 首钢智新迁安电磁材料有限公司 | A kind of cold continuous rolling Starting control optimization method and device |
| CN110142297A (en) * | 2019-06-19 | 2019-08-20 | 东北大学 | Five Stands Cold Tandem Mill raw material plates of one kind open vehicle method and system |
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| WO2010069575A2 (en) * | 2008-12-18 | 2010-06-24 | Sms Siemag Ag | Method for calibrating two interacting working rollers in a rolling stand |
| CN101879523A (en) * | 2009-05-04 | 2010-11-10 | 上海重型机器厂有限公司 | Bending cylinder block |
| CN101918155A (en) * | 2008-03-04 | 2010-12-15 | 新日本制铁株式会社 | Plate rolling mill and plate rolling method |
| CN101947546A (en) * | 2010-08-02 | 2011-01-19 | 西北有色金属研究院 | Rolling device and rolling method for small-size narrow strips |
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2011
- 2011-07-14 CN CN2011101970887A patent/CN102266870A/en active Pending
Patent Citations (6)
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| EP0175621A1 (en) * | 1984-09-21 | 1986-03-26 | Clecim Sa | Tandem rolling mill for flat rolling stock |
| WO1995024281A1 (en) * | 1994-03-11 | 1995-09-14 | Siemens Aktiengesellschaft | Rolling mill, in particular cold rolling mill |
| CN101918155A (en) * | 2008-03-04 | 2010-12-15 | 新日本制铁株式会社 | Plate rolling mill and plate rolling method |
| WO2010069575A2 (en) * | 2008-12-18 | 2010-06-24 | Sms Siemag Ag | Method for calibrating two interacting working rollers in a rolling stand |
| CN101879523A (en) * | 2009-05-04 | 2010-11-10 | 上海重型机器厂有限公司 | Bending cylinder block |
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| 刘宁等: "济钢1700mm热轧带钢精轧机平衡力研究", 《轧钢》, vol. 28, no. 2, 30 April 2011 (2011-04-30) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109894482A (en) * | 2019-02-28 | 2019-06-18 | 首钢智新迁安电磁材料有限公司 | A kind of cold continuous rolling Starting control optimization method and device |
| CN110142297A (en) * | 2019-06-19 | 2019-08-20 | 东北大学 | Five Stands Cold Tandem Mill raw material plates of one kind open vehicle method and system |
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Application publication date: 20111207 |