CN100551567C - The control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors - Google Patents
The control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors Download PDFInfo
- Publication number
- CN100551567C CN100551567C CNB2006100469999A CN200610046999A CN100551567C CN 100551567 C CN100551567 C CN 100551567C CN B2006100469999 A CNB2006100469999 A CN B2006100469999A CN 200610046999 A CN200610046999 A CN 200610046999A CN 100551567 C CN100551567 C CN 100551567C
- Authority
- CN
- China
- Prior art keywords
- working roll
- rolling
- control method
- load
- reduction ratio
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
The present invention discloses a kind of control method of cold strip mill working roll balancing the load of Belt Driven by Double Motor, it is characterized in that: by determining what roller technology parameter, emulsion process parameter value, acceleration when dynamically adjusting rolling unit tension force, reduction ratio and driving motor raising speed were realized.The present invention creates a Frotteurism that is suitable for the different rolling loads in upper working rolls and lower working rolls deformed area by determining means such as rational roll roughness and roll life cycle, suitable emulsion technological parameter, emulsion flow-control.The control parameters such as reduction ratio, unit tension and driving motor acceleration of dynamically adjusting tandem mills according to the actual amount of working roll rolled band steel compensate because the working roller abrasion that long life cycle causes.Can improve the stability of the operation of rolling significantly by above-mentioned integrated control method, the motor speed difference that causes owing to upper working rolls and lower working rolls rolling load difference can be controlled in 3%.
Description
Technical field
The invention belongs to the steel rolling field, be applicable to the production process control of the rolling mill for cold rolled steel strip of Belt Driven by Double Motor, specifically is the control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors.
Technical background
In the cold rolling of strip steel production process,, can cause the as-rolled condition difference in the up-down rollers rolling deformation district because the rolling technological parameter of up-down rollers exists difference.Because the as-rolled condition difference of upper working rolls and lower working rolls makes rolling loads such as upper working rolls and lower working rolls roll-force, roll torque there are differences.
Be provided with two motor load balance control functions of up-down rollers transmission in the cold-rolling mill control system for Belt Driven by Double Motor.The purpose of this motor load balance control is for the electric current, the motor torque that guarantee the up-down rollers driving motor unanimity of exerting oneself in rolling process, otherwise the operation of rolling can't be carried out.
The speed of an independent work drive motor is provided with ring and speed control outer shroud in the load control in the control system of each driving motor, so can accurately be controlled.But be controlled in certain scope in order to satisfy the two load difference of driving motor when rolling, the control of the balancing the load of motor is satisfied the consistent requirement of up-down rollers driving motor load by the speed of adjusting motor.
Like this, if there is bigger difference in the up-down rollers rolling load in the operation of rolling, can cause that like this there is big difference in the load of up-down rollers driving motor, the adjustment of the load balancing control system by motor can make the speed difference of up-down rollers motor obviously increase.The increase of up-down rollers motor speed difference makes the speed difference of upper working rolls and lower working rolls increase, when the speed difference of upper working rolls and lower working rolls is increased to certain value, gently then belt steel surface will produce the slide mark defective, heavy then with steel because of the stranding that is subjected to up-down rollers roll the effect broken belt cause production accident.
Because there are the problems referred to above in the cold-rolling mill of Belt Driven by Double Motor, therefore newly-built in recent years cold-rolling mill generally adopts single motor kind of drive.But the cold-rolling mill of Belt Driven by Double Motor still is used for actual production at present in a large number, therefore is necessary to take suitable method to overcome the above-mentioned shortcoming of double motor drive system.
Summary of the invention
At the problem that exists in the existing Belt Driven by Double Motor cold-rolling mill production technology, the present invention proposes a kind of integrated control method, it is the control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors, upper working rolls and lower working rolls speed difference in the operation of rolling can be controlled at small range, thereby guarantee the stable of the operation of rolling, avoid producing steel strip surface defect, do not influence normal milling train production process.
Technical scheme of the present invention is such, by determining what roller technology parameter, emulsion process parameter value, acceleration when dynamically adjusting rolling unit tension force, reduction ratio and driving motor raising speed were realized.
Each parameter of the present invention is as follows:
The roller technology parameter comprises that working roll roughness, maximum rolling cycle of roll and working roll are joined the roller technology parameter value of roller diameter difference,
Wherein,
The work roll surface roughness: 0.9 μ m～1.1 μ m,
The maximum rolling cycle: 4200 tons,
It is poor that maximum is joined roller: 4mm.
The emulsion technological parameter is:
Flow＞5000l/min,
Concentration: 3.0～3.5%,
PH value: 5～8,
Electrical conductivity＜120 μ s/cm,
Saponification number＞120mg KOH/g,
E.S.I:40～60%, E.S.I are represented the physical quantity of the stability of emulsion,
Temperature: 55～60 ℃,
Pressure: 8～10Bar,
Upper working rolls and lower working rolls emulsion flow-rate ratio: 0.8～0.85.
Milling train exporting unit tension force controlling value is,
When working roll rolling cycle 0～2000 ton hour, unit tension numerical value is 1.0 σ Mpa;
When working roll rolling cycles 2000～3000 ton hour, unit tension numerical value is 1.15 σ Mpa;
When working roll rolling cycles 3000～4200 ton hour, unit tension numerical value is 1.4 σ Mpa.
Wherein σ is a milling train exporting unit tension force.
Milling train exporting unit tension force controlling value,
When working roll rolling cycle 0～2000 ton hour, reduction ratio numerical value 1.0r%,
When working roll rolling cycles 2000～3000 ton hour, reduction ratio numerical value 0.9r%,
When working roll rolling cycles 3000～4200 ton hour, reduction ratio numerical value 0.7r%,
Wherein r is a reduction ratio.
Motor raising speed Acceleration Control,
Working roll rolling cycle 0～2500 ton hour on duty, acceleration value 1.0m/s
2,
Working roll rolling cycles 2500～4200 ton hour on duty, acceleration value 0.6m/s
2
Above-mentioned parameter of the present invention can adopt wherein two or more or adopt simultaneously, load balance of rolling mill for cold rolled steel strip driven by dual electrical motors is controlled.
The present invention adopts method that computer controlled automatic and measuring technique, friction combine with lubricating status control and cold continuous rolling band steel Dynamic Rolling Process rules technology that the contact with the strip rolling load of deformed area of upper working rolls and lower working rolls in the cold-strip steel operation of rolling is carried out Comprehensive Control, in the hope of roll-force, the roll torque balance in the deformed area up and down, it is poor to reduce rolling load, thereby reduces the upper working rolls and lower working rolls speed difference that up-down rollers driving motor load difference causes.Can improve the stability of the operation of rolling significantly by above-mentioned integrated control method, the motor speed difference that causes owing to upper working rolls and lower working rolls rolling load difference can be controlled in 3%.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a Belt Driven by Double Motor milling train schematic diagram,
Fig. 2 is a driving motor speed measured data in the operation of rolling under embodiment 1 process conditions,
Fig. 3 is a driving motor speed measured data in the operation of rolling under embodiment 2 process conditions,
Fig. 4 is a driving motor speed measured data in the operation of rolling under embodiment 3 process conditions.
The specific embodiment
As shown in Figure 1,2,3 is upper and lower working roll, and 1,4 is upper and lower backing roll, and 5 is steel plate, and 6,7 is the up-down rollers driving motor.
The present invention determines original work roll surface roughness working range by a large amount of industrial experiments: 0.9～1.1 μ m; 4200 tons of maximum rolling cycles of working roll; It is 4mm that upper and lower working roll is joined roller diameter difference maximum.When working roll is joined roller, if upper working rolls and lower working rolls diameter difference during greater than 1mm the major diameter working roll be used for top roll, if the diameter difference during less than 1mm the high roll of surface roughness be used for top roll.Determine emulsion technological parameter (table 1) by a large amount of industrial experiments:
Table 1 emulsion technological parameter
In the operation of rolling, by to the control of the opening degree of valve in the emulsion spraying system equipment, the emulsion injection flow that makes top working roll is 0.8～0.85 with the ratio of the emulsion injection flow of bottom working roll.
When the rolled band steel total amount of working roll changes, the acceleration (table 4) when dynamically adjusting milling train exporting unit tension force (table 2), reduction ratio (table 3) and up-down rollers driving motor raising speed according to the rolling total amount of working roll.
Table 2 milling train exporting unit tension force controlling value
Table 3 milling train reduction ratio controlling value
Table 4 motor raising speed Acceleration Control value
In table 2 and the table 3, tension force σ of milling train exporting unit and reduction ratio r are not fixed values, and they are to be got by calculating according to steel grade, the specification of rolled band steel by control system computer model system.
The present invention proposes on the basis of control system calculated value, unit tension, reduction ratio and motor raising speed acceleration is dynamically revised according to the roll rolling cycle.
Embodiment 1:
The original rugosity just of upper and lower working roll is respectively: 0.91 μ m, 0.95 μ m.The rolled band steel total amount of working roll is 1524 tons during belt steel rolling.Belt steel rolling steel grade st12, inlet thickness 2.19mm, reduction ratio r are 20%, the wide 1250mm of strip.The tension force σ of milling train exporting unit is 120Mpa in the operation of rolling, and motor acceleration is 1m/s in the accelerator
2
Concentration of emulsion used is 3.25%, and temperature is 57 ℃, and pH value is 6.1, and electrical conductivity is 101 μ s/cm, and saponification number is 170mg KOH/g, and E.S.I is 51%, expulsion pressure 9.1Bar, working roll emulsion injection flow 5140l/min.
Under above-mentioned technological parameter condition, the torque of up-down rollers driving motor and speed actual value such as Fig. 2 in the belt steel rolling process.
Embodiment 2:
The original rugosity just of upper and lower working roll is respectively: 0.98 μ m, 0.94 μ m.The rolled band steel total amount of working roll is 2422 tons during belt steel rolling.Belt steel rolling steel grade spcc, inlet thickness 2.17mm, the wide 1220mm of strip.The initial depression rate r of computer settings is 18%, is 0.9 * 18% through revised reduction ratio.The tension force σ of milling train exporting unit of computer initial setting is 125Mpa, and exporting unit's tension force is 1.15 * 125Mpa after revising, and the motor acceleration of initial setting is 1m/s
2, revised acceleration is 0.8m/s
2
Concentration of emulsion used is 3.5%, and temperature is 58 ℃, and pH value is 6.4, and electrical conductivity is 106 μ s/cm, and saponification number is 173mg KOH/g, and E.S.I is 55%, expulsion pressure 9.7Bar, working roll emulsion injection flow 5410l/min.
Under above-mentioned technological parameter condition, the torque of up-down rollers driving motor and speed actual value such as Fig. 3 in the belt steel rolling process.
Embodiment 3:
The original rugosity just of upper and lower working roll: 1.04 μ m, 1.14 μ m.The rolled band steel total amount of working roll is 3104 tons during belt steel rolling.Belt steel rolling steel grade st12, inlet thickness 1.15mm, the wide 1225mm of strip.The initial depression rate r of computer settings is 33%, is 0.7 * 33% through revised reduction ratio.The tension force σ of milling train exporting unit of computer initial setting is 125Mpa, and exporting unit's tension force is 1.4 * 125Mpa after revising, and the motor acceleration of initial setting is 1m/s
2, revised acceleration is 0.6m/s
2
Concentration of emulsion used is 3.5%, and temperature is 59 ℃, and pH value is 7.2, and electrical conductivity is 103 μ s/cm, and saponification number is 170mg KOH/g, and E.S.I is 51%, expulsion pressure 9.3Bar, working roll emulsion injection flow 5141l/min.
Under above-mentioned technological parameter condition, the torque of up-down rollers driving motor and speed actual value such as Fig. 4 in the belt steel rolling process.
In the operations of rolling such as embodiment 1～embodiment 3, the real data of up-down rollers driving motor speed can be found, adopt roller technology parameter of the present invention, emulsion technological parameter and corresponding dynamic rolling procedure, the operation of rolling of band steel is stable, and the speed difference of the motor of up-down rollers all is controlled in 3%.
Claims (6)
1, a kind of control method of cold strip mill working roll balancing the load of Belt Driven by Double Motor is characterized in that: by determining what roller technology parameter, emulsion process parameter value, acceleration when dynamically adjusting rolling unit tension force, reduction ratio and driving motor raising speed were realized.
2, the control method of the cold strip mill working roll balancing the load of a kind of Belt Driven by Double Motor according to claim 1, it is characterized in that, the roller technology parameter comprises that working roll roughness, maximum rolling cycle of roll and working roll are joined the roller technology parameter value of roller diameter difference
Wherein,
The work roll surface roughness: 0.9 μ m～1.1 μ m,
Maximum rolling cycle: 4200T,
It is poor that maximum is joined roller: 4mm.
3, the control method of the cold strip mill working roll balancing the load of a kind of Belt Driven by Double Motor according to claim 1 is characterized in that, the emulsion technological parameter is,
Flow＞5000l/min,
Concentration: 3.0～3.5%,
PH value: 5～8,
Electrical conductivity＜120 μ s/cm,
Saponification number＞120mg KOH/g,
E.S.I:40～60%, E.S.I are represented the physical quantity of the stability of emulsion,
Temperature: 55～60 ℃,
Pressure: 8～10Bar,
Upper working rolls and lower working rolls emulsion flow-rate ratio: 0.8～0.85.
4, the control method of the cold strip mill working roll balancing the load of a kind of Belt Driven by Double Motor according to claim 1 is characterized in that, milling train exporting unit tension force controlling value is,
When working roll rolling cycle 0～2000 ton hour, unit tension numerical value is 1.0 σ Mpa;
When working roll rolling cycles 2000～3000 ton hour, unit tension numerical value is 1.15 σ Mpa;
When working roll rolling cycles 3000～4200 ton hour, unit tension numerical value is 1.4 σ Mpa,
σ initial setting unit tension wherein.
5, the control method of the cold strip mill working roll balancing the load of a kind of Belt Driven by Double Motor according to claim 1 is characterized in that,
When working roll rolling cycle 0～2000 ton hour, reduction ratio numerical value 1.0r%,
When working roll rolling cycles 2000～3000 ton hour, reduction ratio numerical value 0.9r%,
When working roll rolling cycles 3000～4200 ton hour, reduction ratio numerical value 0.7r%,
Wherein r is the rolling reduction ratio of initial setting.
6, the control method of the cold strip mill working roll balancing the load of a kind of Belt Driven by Double Motor according to claim 1 is characterized in that, motor raising speed Acceleration Control,
Working roll rolling cycle 0～2500 ton hour on duty, acceleration value 1.0m/s
2,
Working roll rolling cycles 2500～4200 ton hour on duty, acceleration value 0.6m/s
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100469999A CN100551567C (en) | 2006-06-19 | 2006-06-19 | The control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100469999A CN100551567C (en) | 2006-06-19 | 2006-06-19 | The control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101091965A CN101091965A (en) | 2007-12-26 |
| CN100551567C true CN100551567C (en) | 2009-10-21 |
Family
ID=38990502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100469999A Expired - Fee Related CN100551567C (en) | 2006-06-19 | 2006-06-19 | The control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100551567C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5060432B2 (en) * | 2008-08-29 | 2012-10-31 | 株式会社日立製作所 | Hot rolling tension control device and tension control method |
| CN101934288B (en) * | 2009-06-30 | 2014-08-27 | 上海宝信软件股份有限公司 | Cold continuous rolling reduction distribution method |
| CN102296169B (en) * | 2010-06-25 | 2015-06-17 | 上海宝钢工业技术服务有限公司 | Early warning method for pocking marks on surface of strip steel of annealing set |
| CN102476131A (en) * | 2010-11-26 | 2012-05-30 | 宝山钢铁股份有限公司 | Cold rolling method for preventing high-silicon strip steel from being broken |
| CN104550236B (en) * | 2015-01-07 | 2017-02-22 | 王乐 | Cold rolling process capable of preventing broken edge wave defect of ultrathin steel strip |
| CN109261728B (en) * | 2018-09-29 | 2020-02-07 | 安阳复星合力新材料股份有限公司 | Double-drive synchronous control method for cold-rolled bar mill |
| CN110129545B (en) * | 2019-04-28 | 2021-01-12 | 首钢智新迁安电磁材料有限公司 | Method and device for improving tension control stability of annealing furnace |
| CN110369517B (en) * | 2019-07-31 | 2021-06-01 | 日照宝华新材料有限公司 | Method for controlling scratch of tension roller in slipping |
| CN111438186B (en) * | 2020-03-31 | 2022-01-18 | 首钢京唐钢铁联合有限责任公司 | Preparation method of five-tandem mill strip steel |
| CN113295491A (en) * | 2021-05-24 | 2021-08-24 | 河海大学 | Metallographic preparation device for material science and engineering |
| CN114210730B (en) * | 2022-02-21 | 2022-04-26 | 山西太钢不锈钢精密带钢有限公司 | Production method for improving rolling efficiency of stainless steel precision strip steel |
-
2006
- 2006-06-19 CN CNB2006100469999A patent/CN100551567C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101091965A (en) | 2007-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100551567C (en) | The control method of load balance of rolling mill for cold rolled steel strip driven by dual electrical motors | |
| CN106909723B (en) | Method for optimally setting relation curve between emulsion flow and rolling speed in cold rolling process | |
| CN102581067B (en) | Hot-rolled coiler pinch roll controlling method | |
| CN103691855B (en) | The roll forming of structural steel straight-flanked ring base is the method for special-shaped thin wall ring | |
| CN106583452B (en) | A kind of optional metal polar thin hoop mill of the kind of drive and its milling method | |
| CN106391708B (en) | Rolling method for producing ultrathin strip steel by using cold rolling six-roller single-stand reversible rolling mill | |
| CN204122476U (en) | Fixed thick, the level pressure closed-loop adjustment control system of precision of battery pole piece rolling mill | |
| CN102039316A (en) | Zero-point calibration method for hot continuous rolling machine frame | |
| CN105268748A (en) | Hot rolling load distribution method based on product classification | |
| CN101920265B (en) | Method for optimizing roll shifting process of middle roll of six-roll cold mill | |
| CN103861873B (en) | A kind of UCMW cold continuous rolling texturing rolling system and method | |
| CN206918078U (en) | The hydrostatic bearing fueller of cold-rolling machine supporting-roller | |
| CN103406353B (en) | A kind of cold-strip steel stretching-bending straightener with roll shifting function | |
| CN100496781C (en) | Median plate four-high mill single side following type load equalization control method | |
| CN103357676B (en) | A kind of system of subdivision control of level liquid injection pressure and method thereof | |
| CN109092902B (en) | The first rolling mill is prevented to sting the milling method of steel skidding | |
| CN108213088A (en) | The control method of smooth flow quantity in a kind of cold-rolled steel sheet wet jetting piles operation of rolling | |
| CN101574703B (en) | Shell course rolling technology | |
| CN102641894A (en) | Vertical roll control method and device for medium plate edging mill | |
| CN101342542B (en) | Channel steel rolling method | |
| CN201175719Y (en) | Hydraulic pressure servo battery pole piece rolling mill | |
| CN201214104Y (en) | Control device for empty setting machine frame loop of fault rolling mills | |
| CN104525577A (en) | Method for eliminating thickness out-of-tolerance existing during rolling acceleration and deceleration | |
| CN201002102Y (en) | Four-roller cold-rolling machine and leveling machine rolling line stepless regulating device | |
| CN206344430U (en) | Multifilm flexibility pressing and forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20210619 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |