CN104428075B - The method of process rolled piece in milling train - Google Patents
The method of process rolled piece in milling train Download PDFInfo
- Publication number
- CN104428075B CN104428075B CN201380036366.8A CN201380036366A CN104428075B CN 104428075 B CN104428075 B CN 104428075B CN 201380036366 A CN201380036366 A CN 201380036366A CN 104428075 B CN104428075 B CN 104428075B
- Authority
- CN
- China
- Prior art keywords
- driving device
- pilot control
- loading moment
- rolling
- electric current
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- 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
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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
- B21B37/46—Roll speed or drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/10—Motor power; motor current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/10—Motor power; motor current
- B21B2275/12—Roll torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
- B21B35/04—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills each stand having its own motor or motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
A kind of method that the present invention relates to rolled piece (6) processed in milling train (2), this milling train has the rolling-mill housing of driving device (8) (4) with at least one, wherein, in order to reduce by driving device (8) upper generation effect, foreseeable loading moment (ML) rotating speed of driving device (8) that causes declines, and is realized the roll torque pilot control of driving device (8) by that flow to driving device (8), to form moment electric current (I).
Description
Technical field
The method that the present invention relates to a kind of process rolled piece in milling train, this milling train has at least one rolling-mill housing with driving device.
Background technology
Processing rolled piece, such as steel or during with the different metal of so-called slab or steel billet form, rolled piece is through the mill train with one or more rolling-mill housing.Each rolling-mill housing is respectively provided with a driving device for roll, utilizes roll, rolled piece be rolled into there is intended geometry, such as the sheet material of predetermined thickness or cross section or wire rod.
In order to realize this purpose, it is necessary to roll to be adjusted to the rotating speed determined under the help of the driving device of each rolling-mill housing.It is important in this that, during the whole service of mill train, the predetermined ratio of the rotating speed of the roll of each mill train also to keep constant, this is because otherwise tension load and pressure load will occur on rolled piece, this can cause again undesirable rolling result, or result even in the fracture of rolled piece or form knotting.
In order to especially guarantee this purpose when high mill speed in mechanical aspects, more such as it is in the transfer gear connection coupled to each other rigidly by machinery in the wire frame of multi-frame of the roll in elongated products mill train, and utilizes common motor to drive.But, a bigger shortcoming at this is that equipment component can not be matched with other product owing to fixing for rotating ratio, and such as when some roll wears, whole roll stacks is required for pondering again, otherwise arises that effect described above.
These shortcomings can thus overcome, and namely each rolling-mill housing has the independent driving device for roll.It is respectively provided with independent speed setting unit, such that it is able to individually it is adjusted at this each driving device.
But, a huge requirement of such driving device solution is, during processing rolled piece, the revolution of the roll of each rolling-mill housing or driving device is regulated.When each rolling-mill housing is produced to affect by different loading moments especially true, this be such as when open rolling, namely situation when rolled piece occurs on roll.When driving device is had such impact by loading moment, roll is braked, and therefore this cause that the rotating speed of the roll in relevant rolling-mill housing or driving device declines.On the contrary, do not have when open rolling time point or the roll of devious, such as less loading moment those other rolling-mill housing that it is influential has unchanged or only changes less rotating speed.This causes that the rotating speed of each driving device or roll is asynchronous, is namely no longer operated with default rotating ratio each other.This causes the mistake of material thickness and causes that when unallowed stretching or pressure load the fracture of wire rod between each rolling-mill housing or rolled piece form knotting.
For this, utilize up to now, there is partial stack correction engaging means speed setting unit, each driving device of the characteristic of whole system, namely rolling-mill housing or the characteristic of roll and its be all no longer foreseeable on the impact of rolling result so that the quality of rolled piece no longer can with require to adapt.
Summary of the invention
Therefore, a kind of method that the purpose of the present invention is to propose to rolled piece for processing in milling train, wherein it can be avoided that above-mentioned shortcoming.
This purpose is realized by a kind of method of rolled piece for processing in milling train.At this, this milling train has at least one rolling-mill housing with driving device, wherein, declined by generation effect on the drive means, driving device that foreseeable loading moment causes rotating speed to reduce, realized the roll torque pilot control of driving device by that flow to driving device, to form moment electric current.
In the method according to the invention, when such as when there is foreseeable loading moment when open rolling, the rotating speed thus determined descends through the roll torque pilot control of the electric current to the formation moment being supplied to driving device to be reduced.Suitable parameter is applied for the predictable of loading moment, the position of such as roll seam geometric profile, material sensors and feature, the spacing of each rolling-mill housing or mill speed and material velocity, when accordingly it was determined that relevant driving device or with which type of degree is affected by loading moment.The analog value of the height including foreseeable loading moment can such as model by milling train be determined.Then, predictable in this wise the volume electric current being supplied to driving device can be carried out autotelic pilot control according to this, i.e. reduce the rotational speed of driving unit reduction occurring being associated with loading moment.Thereby, it is ensured that the controlled operation of the roll of driving device or each rolling-mill housing and then whole equipment.Thus, no longer various stretching or pressure load are caused due to the strong fluctuation of speed of each driving device or the roll of different rolling-mill housing.Thus reduce the deviation on thickness and be avoided as much as the fracture of rolled piece or formed knotting.When milling train has multiple rolling-mill housing with independent driving device and each driving device by individually pilot control, particularly relate to this situation.
Foreseeable loading moment is by correcting e.g. particularly torque value, the actual value of tachometer value and the acceleration actual value thus derived.Thus, dynamic calibration is realized when the position of band head.Can the degree of additionally dynamic calibration loading moment by observing and nursing.In the repetitive process of identical material, realize repeatedly optimizing the correction of unused time point and repeatedly correcting the degree of foreseeable loading moment by the assessment between the pilot control value of foreseeable loading moment and current loading moment.
In a preferred embodiment of the invention, pilot control is based on material.This means, this be first also contemplated for material parameter, such as the factor of hardness or its impact, such as temperature and material type, relevant driving device is had much impacts by foreseeable loading moment, thus driving device being carried out corresponding pilot control based on this also and then change the electric current supplied.
In order to driving device is carried out pilot control make current jump formula when loading moment occurs raise time, system temporarily to occur loading moment make a response.Disadvantage thereof however is that, when the such saltatory change of supply, formation moment electric current, except mechanical features, the response characteristic of whole system is also had impact at corresponding operating point by the characteristic of current transformer.
In order to be avoided, increase electric current not jumping characteristic, but the ground that rises, in time window continuously, especially increase ramp type, for driving device is carried out pilot control.Thus, the corresponding torque of driving device also just only will be relatively slowly, namely ramp type ground change.Differently, this slope can also be preset as stepped.
At this, so measure the slope on slope for torque, namely drivetrain be maintained at definition and at any time in all reproducible state.Therefore, whole system is better controlled, and each driving device and especially whole system all present the time response significantly improved.Thus ensure that the recyclability of the performance of whole system.The restriction that electric current rises is raised by the corresponding ramp type of current rating and realizes, and can indirectly by direct torque also or rotating speed pilot control realize.
The slope on slope depends on the power of commutator.At this, the layout of rectifier type, operating point and commutator, the size of electric current especially to be implanted, rotating speed and voltage reserve are key factors.When high reproducibility, the slope meansigma methods corresponding to realizing at regulation operating point.Slope for reproducibility completely, slope or ladder is necessarily less than possible greatest gradient at this, and this greatest gradient can be supplied to commutator at all regulation operating points.The rising of rated value does not make the attainable power transition of commutator rise to the voltage limit when Rated motor voltage and peak power.This eliminates the deviation of the rectifier characteristic in different operating points.It is possible to realize point-device and foreseeable pilot control when high speed.By interpolation, except dynamically illustrating that the loading moment occurred is for except dynamically correcting positions of materials and the load of machinery systems, reproducible operation also allows for ruggedness is carried out point-device analysis.
In order to carry out pilot control before turn and afterwards without rotating speed deviation, so design slope, namely the driving device torque realized by elevated currents is risen and result in the deviation of symmetrical effect, therefore eliminates until occurring that the speed of load rises and until completely setting up the delay of torque after there is load.When load and the constant slope of saltatory, the connection of torque has half to realize before there is load torque, and second half realizes after there is load torque.
When load occurring until when fully the rise time connected between torque is not above frame spacing divided by the value of material velocity, terminating pilot control before material enters in follow-up frame.When there being the deviation of symmetrical impact, it is corresponding to material necessary DT Doubling Time through two frames.
In conjunction with the description of the following embodiment that connection with figures is elaborated, the above-mentioned characteristic of the present invention, feature and advantage and the type realized thereof and mode are to become apparent from and apparent clearly.
Accompanying drawing explanation
For the embodiment in the further description reference diagram of the present invention.There is shown schematic schematic diagram:
Fig. 1 is the view of mill train with rolling-mill housing that order arranges and the independent driving device for each rolling-mill housing,
Fig. 2 is a chart, illustrated therein is the load torque on the driving device being respectively acting on rolling-mill housing and is supplied to the electric current of this driving device change curve in time,
Fig. 3 is a chart, illustrated therein is value shown in figure 2 when working, the corresponding rotating speed of driving device change curve in time.
Detailed description of the invention
Fig. 1 illustrates the sectional view of the mill train 2 with the rolling-mill housing 4 being sequentially arranged each other, and wherein this rolling-mill housing is for processing rolled piece 6.Schematically show eight rolling-mill housing being sequentially arranged each other 4 in FIG, rolled piece 6 these rolling-mill housing of traverse, for instance the bar as rolled piece is rolled into wire rod.
Each rolling-mill housing 4, to there being an independent driving device 8 including motor 10 and actuating device 12, wherein illustrate only driving device 8 in the accompanying drawings for clarity.By the commutator 14 with control unit 16, supply desired electric current I for driving device.Each rolling-mill housing 4 also includes at least one roll 13, and it is driven with default rotating speed n by corresponding driving device 8, and this rotating speed such as obtains from passage table.
If rolled piece 6 occurs on the roll 4 of rolling-mill housing 13, then be applied with loading moment M on the driving device 8 of corresponding rolling-mill housing 13L.This loading moment MLCause now the decline of the rotating speed n of the driving device 8 being correlated with.In the milling train 2 according to prior art, correspondingly rotating speed n is upwards revised, thus after the time delay determined, the driving device 8 of relevant rolling-mill housing 4 has intended rotating speed n again.But, is especially there is loading moment M in the characteristic of driving device 8LNot always can regenerate afterwards.Fluctuating based on consequent rotating speed deviation with the stretching being associated, the quality of rolled products not always can meet requirement.In other words, the dynamic property of driving device depends on the loading moment M of appearanceLPerformance with actuator.But, these performances are not always precisely enough foreseeable, and are only capable of regenerating conditionally based on the dependency with operating point.
According to the present invention, reduce the loading moment M by generation effect on driving device 8LThe rotating speed that causes declines, and this is achieved in, namely driving device 8 by control unit 16 and commutator 14 in view of its electric current I being supplied to carrys out pilot control.
In order to realize this target firstly the need of knowing or estimate loading moment ML, say, that loading moment is foreseeable value.The such as known value according to the model of milling train 2 and rolled piece 6 to be rolled, it is possible to determine the loading moment M of effect on the driving device 8 of rolling-mill housing 4LCorresponding predictive value.At this, measure this predictive value in time, thus predicting the loading moment M of the driving device 8 of determination for rolling-mill housing 4 in the way of time changing curveL.Depend on this foreseeable loading moment ML, then it is achieved in that the roll torque pilot control to driving device 8 by that be supplied to driving device, to form moment electric current I, namely the rotating speed of driving device 8 being declined compensates.For differently driving the driving device of more than one rolling-mill housing 4 with preferred version before, the loading moment M relevant to motor measured in timeLShow the summation of each roll torque relevant to motor.
It is diagrammatically only that two rolling-mill housing 4 with each corresponding driving device 8 illustrate the loading moment M occurred thereon in fig. 2LAnd it being supplied to the time changing curve of the electric current I of this driving device 8, this electric current I has corresponding controlling value, namely the current rating in time changing curve.Curve 18 illustrates at time t2Time loading moment M on the driving device 8 of the first rolling-mill housing 4LSaltatory change, and the loading moment M that curve 20 represents when time point t7 on the driving device 8 of the second rolling-mill housing 4LJump.
In order to reduce by the loading moment M of effect on driving device 8LThe rotating speed of the driving device 8 caused declines, and realizes the pilot control targetedly to driving device 8 by means of control unit 16 and commutator 14 by being supplied to the electric current I of driving device.For this, at time point t0, namely loading moment M is occurringLIncreasing the rated value of electric current I with regard to ramp type, this is as shown in curve 22 before.Then, electric current I from but be also at that loading moment M occursLTime point t2Between time point t1Starting to follow with less time delay, this is as shown in curve 24.The slope of current rating and electric current I measures in this wise at this; namely driving device 8 is maintained in stable state, and this state is also renewable, say, that; the rising of current rating and electric current I so very slowly realizes so that driving device 8 has the operation characteristic defined.Especially the slope of electric current I is designed in this wise, and loading moment M is occurring in the torque rising half of the driving device 8 namely realized by electric current risingLSecond half realizes after this before.It means that from t1To t2Interval with from t3To t4Interval equal.Reaching time point t4Time, loading moment MLValue equal to the value of torque M of driving device 8.
After a certain time period, for instance when inserting rolled piece 6, this situation occurs in the second rolling-mill housing 4, and causes loading moment M thereLJump in various degree, it is as shown in curve 20.This corresponding loading moment MLFurther through known parameter it is contemplated that.At this, in order to reduce by loading moment MLThe rotating speed of the driving device 8 caused declines, also by time point t5And t8Between the current rating that increases of ramp type ground, it is as shown in curve 26, realized the pilot control to driving device 8.At this, after corresponding time delay, also at t6And t9Between interval in so increase electric current I according to curve 28 ramp type, namely driving device 8 is maintained in stable state, and loading moment M is occurring by the electric current torque rising half of driving device 8 realized that risesLSecond half realizes after this before.
Now, figure 3 illustrates the rotation speed change curve of two driving devices 8 in corresponding rolling-mill housing 4.Following curve 30 illustrates the time changing curve of the rotating speed n of the driving device 8 of the first rolling-mill housing 4.By the pilot control to the electric current I being supplied to driving device 8, first from time point t1Start increase torque M as described above and therefore also improve rotating speed n.This straight hair is raw until time point t2, at this time point loading moment MLTo driving device 8 generation effect, it causes that rotating speed drops under intended rotating speed n now.By at time point t2And t4Between improve further electric current I and torque M, rotating speed n is brought to intended value.
Corresponding change curve illustrates for the curve 32 of the driving device 8 of the second rolling-mill housing 4.
Curve trend according to rotating speed n can recognize that, the rotating speed of driving device 8 descends through corresponding pilot control and compensates.The overlapping torque ripple disappeared gradually is not shown for purposes of clarity.Pilot control by the associated predefined rising to the pilot control of electric current I and electric current I, in this form with slope, during the dynamic operation of driving device, guarantee that it runs all the time in definition and reproducible state so that in the operation of rolling, avoid the formation of the fracture of knotting or rolled piece.Thus, it is also possible to by pilot control influential system characteristic better, with to the loading moment M occurredLCompensate.
Although the present invention is illustrated further by preferred embodiment and described in detail, but the present invention is not limited by disclosed enforcement and other variant can be derived by those skilled in the art, without protection scope of the present invention is impacted.
Claims (13)
1. the method for processing the rolled piece (6) in milling train (2), described milling train has the rolling-mill housing of driving device (8) (4) with at least one, wherein, in order to reduce by loading moment (M that go up generation effect at described driving device (8), that can predictL) rotating speed of described driving device (8) that causes declines, and is realized the roll torque pilot control of described driving device (8) by that flow to described driving device (8), to form moment electric current (I).
2. method according to claim 1, wherein, described milling train (2) is elongated products milling train and has multiple rolling-mill housing (4), described rolling-mill housing is with each independent driving device (8) for high mill speed, and the described loading moment (M that individually pilot control is limited by the operation of rolling when each described driving device (8)L)。
3. method according to claim 1 and 2, wherein, realizes described pilot control based on material.
4. method according to claim 1 and 2, wherein, in order to described driving device (8) is carried out pilot control, saltatory ground raises described electric current (I).
5. method according to claim 3, wherein, in order to described driving device (8) is carried out pilot control, saltatory ground raises described electric current (I).
6. method according to claim 1 and 2, wherein, in order to described driving device (8) is carried out pilot control, ramp type ground or stepwise raise described electric current (I).
7. method according to claim 3, wherein, in order to described driving device (8) is carried out pilot control, ramp type ground or stepwise raise described electric current (I).
8. method according to claim 6, wherein, depends on that rectifier characteristic is passed through to reduce power and the slope in the trend on slope is measured as follows, and namely described driving device (8) provides the performance being entirely capable of regeneration.
9. method according to claim 7, wherein, depends on that rectifier characteristic is passed through to reduce power and the slope in the trend on slope is measured as follows, and namely described driving device (8) provides the performance being entirely capable of regeneration.
10. method according to claim 6, wherein, designs this slope as follows in order to eliminate remaining speed discrepancy in time, namely until described loading moment (M after there is loadL) completely set up, at loading moment (ML) and realized by described pilot control, the torque of described driving device (8) rise between deviation to until described loading moment (M occursL) time described speed discrepancy compensate.
11. method according to claim 9, wherein, design this slope as follows to eliminate remaining speed discrepancy in time, namely until described loading moment (M after load occursL) completely set up, at loading moment (ML) and realized by described pilot control, the torque of described driving device (8) rise between deviation to until described loading moment (M occursL) time described speed discrepancy compensate.
12. method according to claim 8, wherein, by assessing the rotary speed actual value with the acquisition of described pilot control form or torque actual value, to the described loading moment (M that can predictL) be corrected.
13. method according to claim 11, wherein, by assessing the rotary speed actual value with the acquisition of described pilot control form or torque actual value, to the described loading moment (M that can predictL) be corrected.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12178196.7 | 2012-07-27 | ||
| EP12178196.7A EP2689864A1 (en) | 2012-07-27 | 2012-07-27 | Method for processing milled goods in a rolling mill |
| PCT/EP2013/062141 WO2014016043A1 (en) | 2012-07-27 | 2013-06-12 | Method for processing rolling stock in a rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104428075A CN104428075A (en) | 2015-03-18 |
| CN104428075B true CN104428075B (en) | 2016-07-27 |
Family
ID=46845596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380036366.8A Expired - Fee Related CN104428075B (en) | 2012-07-27 | 2013-06-12 | The method of process rolled piece in milling train |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2689864A1 (en) |
| CN (1) | CN104428075B (en) |
| WO (1) | WO2014016043A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716564B (en) * | 2017-10-27 | 2019-04-23 | 宝钢特钢韶关有限公司 | Wire and rod continuous rolling rolled piece detection method and detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1026936C (en) * | 1990-10-02 | 1994-12-07 | 东芝株式会社 | Method and apparatus for controlling speed of motor |
| DE19624717A1 (en) * | 1995-07-31 | 1997-02-06 | Gfm Gmbh | Process for regulating the rolling stock through a continuous rolling mill |
| CN1174447A (en) * | 1996-08-17 | 1998-02-25 | Sms舒路曼-斯玛公司 | Regulating method |
| CN1239909A (en) * | 1996-12-20 | 1999-12-29 | 西门子公司 | Roll stand drive arrangement |
| US6311532B1 (en) * | 1997-06-23 | 2001-11-06 | Siemens Aktiengesellschaft | Method and device for reducing or compensating rotational speed losses during insertion or rolling stock in a roll stand |
| CN1803326A (en) * | 2006-01-25 | 2006-07-19 | 冶金自动化研究设计院 | Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE757704C (en) | 1937-10-10 | 1953-03-23 | Siemens Schuckertwerke A G | Device for speed control of the drive motors of a continuous roller line |
| JPS6099416A (en) | 1983-11-04 | 1985-06-03 | Mitsubishi Electric Corp | Speed control device of rolling mill |
| JPH04361813A (en) | 1991-06-07 | 1992-12-15 | Kobe Steel Ltd | Method for controlling biting speed of rolled stock in rolling line |
| JPH06218416A (en) | 1993-01-22 | 1994-08-09 | Kawasaki Steel Corp | Method and device for controlling speed of rolling mill |
| JP2005046898A (en) | 2003-07-31 | 2005-02-24 | Jfe Steel Kk | Rolling mill speed control method |
| JP2005254289A (en) | 2004-03-12 | 2005-09-22 | Jfe Steel Kk | Method for controlling speed of rolling mill |
| DE102009050710B4 (en) | 2009-10-26 | 2016-08-04 | Sms Group Gmbh | Wire rolling stand with single drive |
-
2012
- 2012-07-27 EP EP12178196.7A patent/EP2689864A1/en not_active Withdrawn
-
2013
- 2013-06-12 WO PCT/EP2013/062141 patent/WO2014016043A1/en active Application Filing
- 2013-06-12 CN CN201380036366.8A patent/CN104428075B/en not_active Expired - Fee Related
- 2013-06-12 EP EP13729682.8A patent/EP2861360B1/en not_active Revoked
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1026936C (en) * | 1990-10-02 | 1994-12-07 | 东芝株式会社 | Method and apparatus for controlling speed of motor |
| DE19624717A1 (en) * | 1995-07-31 | 1997-02-06 | Gfm Gmbh | Process for regulating the rolling stock through a continuous rolling mill |
| CN1174447A (en) * | 1996-08-17 | 1998-02-25 | Sms舒路曼-斯玛公司 | Regulating method |
| CN1239909A (en) * | 1996-12-20 | 1999-12-29 | 西门子公司 | Roll stand drive arrangement |
| US6311532B1 (en) * | 1997-06-23 | 2001-11-06 | Siemens Aktiengesellschaft | Method and device for reducing or compensating rotational speed losses during insertion or rolling stock in a roll stand |
| CN1803326A (en) * | 2006-01-25 | 2006-07-19 | 冶金自动化研究设计院 | Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2689864A1 (en) | 2014-01-29 |
| EP2861360A1 (en) | 2015-04-22 |
| WO2014016043A1 (en) | 2014-01-30 |
| EP2861360B1 (en) | 2016-11-02 |
| CN104428075A (en) | 2015-03-18 |
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