EP2739411A1 - Verfahren zur ermittlung einer walzgutgeschwindigkeit - Google Patents
Verfahren zur ermittlung einer walzgutgeschwindigkeitInfo
- Publication number
- EP2739411A1 EP2739411A1 EP12756184.3A EP12756184A EP2739411A1 EP 2739411 A1 EP2739411 A1 EP 2739411A1 EP 12756184 A EP12756184 A EP 12756184A EP 2739411 A1 EP2739411 A1 EP 2739411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- determined
- speed
- rolling stock
- value
- 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
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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- 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
- B21B2275/06—Product speed
Definitions
- the invention relates to a method for determining an outlet-soaking rolling stock speed in a rolling stand.
- a hot slab or cast strand is rolled into slabs or ribbons in several passes.
- the rolling stock should generally be rolled to a target thickness specified in the pass schedule. This affects both reversing and continuous rolling mills.
- the roll gap of the stand In order to obtain a desired target thickness on a roll stand, the roll gap of the stand must be suitably adjusted. This is done by a positioning system, which usually adjusts the upper set of rolls with respect to the pass line of the rolling mill.
- the adjustment system is e.g. operated with a hydraulic cylinder or with an electromechanical screw or a combination of both.
- the target value for the roll gap is first from a
- the pass schedule is calculated by a rolling mill model or selected from a list.
- the nip for the current stitch is moved to the appropriate setpoint before the roughing of the rolling stock.
- the puncture is the moment of impact of the rolling stock on the Walzge ⁇ setup or the roller. It is known that after the tapping a Lastwalzspaltregler (Gaugemeter) calculates the current roll gap. This is done taking into account the position of the Anstellsystems, the forces occurring during the rolling process and the framework parameters. On the basis of its scaffolding model, the load-roll gap controller attempts to adjust the roll gap and thus the roll thickness to the target value.
- the known Walzgut yorksmess spur are e.g. used to determine the inlet-soaking stock speed before the first stand.
- the modeled outfeed-side rolling material speed vi ' is from the
- the overfeed s can be calculated here by a rolling model or be known from a list. As soon as you start the run, there will be a valid expiry date
- the leaking ⁇ de rolling stock is then calculated on the basis of the above formula be ⁇ , but the modeled outlet side rolling ⁇ speed vi 'is tracked by the actually measured outlet side rolling stock speed vi.
- the inlet side rolling stock thickness ho is determined from a known initial value, for example a thickness measurement in the roughing train, or from a constant value in a slab. If there is no further thickness measurement in subsequent passes - or no further thickness measurement during reversing - then the
- the spatially correct assignment of a measured thickness or the auslaufseifigen rolling stock thickness to the nip of the particular for the Next Tier ⁇ th stitch rolling mill stand in a known manner by a length-related storage of the rolling stock thickness, egg ⁇ ne synchronization for example on the head of the rolled stock and a displacement monitoring of head to nip.
- the calculated estimated value for the outlet-side rolling stock thickness hi is regulated by the abovementioned mass flow controller known from cold rolling, for example, to its target size, a target outlet thickness hi S.
- the mass flow controller acts on the positioning system of the respective rolling stand and gives, for example, correction values for the speed of inlet-saturated units. Such are, for example, a preceding rolling mill or a reel or roll which unwinds the rolling stock.
- the above-mentioned simple load roll gap controller is therefore in principle replaced by the mass flow controller in this solution.
- the problem with the above-mentioned method is determination of the run-seizing rolling speed vi.
- a direct measurement on the rolling stock is possible.
- a Walzgut- speed measuring means the speed at which the rolling stock passes through a fixed location or a con troll ⁇ point in the system.
- laser or pulser are known on rollers with WalzgutAuth.
- the procedure known measuring only provide inadequate measurement resulting ⁇ skills with respect to rule and subject to corresponding disturbances.
- the object of the invention is to specify an improved method for determining an outlet-seized rolling stock speed.
- the invention is achieved by a method according to claim 1.
- the rolling stand is a rolling stock which vi 'verar ⁇ beitender mass flow controller associated with the after chung
- the correction value is determined using a measured value.
- the measured value is determined during the rolling process.
- the invention is based on the realization that the roll stands ⁇ schwindtechnikscream timing devices at the roller drives especially dynamic components of the rolling process reflects particularly robust. Such components are, for example, acceleration of the rolling train, changes in rotational speed due to speed corrections of the control systems, or load reactions. All this finds its way into the process according to the invention by using the roller speed.
- a corresponding advance value can again be taken from a rolling model or a list in a known manner.
- the predetermined overfeed is in the form of the base value based on measurements - corrected or fine tuned, and to the fact ⁇ plural existing overfeed s better approximated - ie in the form of the correction value.
- This he ⁇ factor enables the determination of a constant current Voreilungs-.
- the lead is thus improved by adaptively adapting a standard value based on the measured values.
- a Corridor ⁇ alloyed overfeed ZB is determined, a correction value per rolling pass to be used for subsequent, for example, similar rolling operations. Also in the next rolling process, a new correction value is then determined, which can then be used for the next but one rolling process.
- a continuous optimization and tracking of the accuracy of the advance is achieved. This has an immediate effect on the accuracy of the estimated outlet side rolling stock speed according to the above formula. So finally the re ⁇ gel performance of the mass flow controller and finally the rolling result is improved.
- the speed is detected via a Walzgut- adapted Walzgut yorks ⁇ model with other words.
- the adaptation takes place by constant adaptation of the correction value on the basis of the currently determined measured values.
- the lead s is adapted by the measured values.
- the invention is a robust method, which, in contrast to an inadequate measurement value for the outlet-side rolling stock speed a sufficiently ge ⁇ nauen Walzgut Irishs actual value as an estimated value ermit ⁇ telt and uses.
- the value zero is initially selected as correction value.
- the correction values determined are then stored cumulatively for subsequent passings. Although a correspondingly determined correction value usually only acts on the following rolling process. In the course of time, however, this leads to a continued ⁇ current statistical adaptation of the rolling model or stored in lists characteristics for overfeed.
- the measured value is at
- Walzgut determined itself. However, this does not mean the o.g. direct speed measurement on the rolling stock. A different measured value is measured here, which is included in the calculation of the rolling stock speed only via the overfeed.
- that time difference is determined as a measured value, in which a be ⁇ voted portion of the rolling a certain distance travels in a roll stand containing the rolling mill.
- a be ⁇ voted portion of the rolling a certain distance travels in a roll stand containing the rolling mill.
- This is also in contrast to the above-mentioned direct Walzgutgeschwindig ⁇ keitsunk.
- the speed is be ⁇ true, with a certain portion of the rolling passes a fixed investment location.
- the section of the rolling stock is, for example, a certain fixed point or location on the rolling stock.
- the head of the rolling stock is used as the section.
- the head of the rolling stock refers to the seen in BEWE ⁇ supply direction front end of the rolling stock.
- the distance between the stands of two rolling mills passed through the rolling stock is used as the travel distance, and the time difference is determined which passes through the rolling stock between the times of the Ansti ⁇ che of the two rolling mills.
- two adjacent rolling mills become according to the above selected.
- the integration of the rolling speed on ers ⁇ th roll stand from the time of tapping results in a ge ⁇ covered length, with the outlet side skeleton protrudes the rolling stock from the rolling ⁇ .
- the integration takes place until the time at which the rolling stock punctures the next stand and gives ei ⁇ ne final length 1.
- T t2-tl the time of tapping.
- an actual speed of the rolling stock is additionally determined by known measuring methods. Such an actual speed is thus one with which the rolling stock passes a certain plant location. Such an actual speed is actually measured and, together with the lead determined according to the invention, processed in a lead advance adaptation determining a controlled overfeed. In other words, the actual velocity and the lead corrected according to the invention enter the lead adaptation controller.
- a certain weighting between the measured value and the advance value can be selected.
- a rolling material speed measured after the rolling stand or between rolling stands is used by the advance adaptation controllers. The use is, however, to increase the robustness of the mass flow control only indirectly, namely together with the inventively determined ⁇ lead in the advance adaptation controller.
- the Walzgut Norwaysermitt ⁇ ment an optimal compromise between robust dynamics and high stationary accuracy is achieved.
- the measured Wal ⁇ zen Agriculture is then multi- with a modeled and tracked over the Voreilungsregelung Voreilungs imagery cated. The result is ultimately the more ⁇ zuver,de rolling stock.
- the measured or, as a result of the advance or pre-hurry adaptation controller, the actual advance is a direct indication of the modeling quality of the overfeed and can thus be used ideally for the adaptation of the process models.
- the adaptation of the modeled lead can also be easily limited in the controller:
- the controlled overfeed determined by the advance controller is frozen, i. their value is retained and will not be further adjusted.
- the overfeed adaptation controller is frozen, i. the override factor applicable at the time of the incorrect measurement is not further corrected, but is constantly being used. This can for example be done until a valid actual speed is measured again. The adjustment of the lead can then be continued to obtain even more accurate lead values.
- FIG. 2 shows two successive rolling mills of the rolling mill
- FIG. 3 shows an alternative mass flow regulator from FIG. 1.
- 1 shows a detail of a rolling mill 2, namely a rolling stand 4, in which a rolling stock 6 is to be rolled by means of a roller 8.
- the rolling stock 6 is fed to the rolling stand 4 with an incoming rolling stock thickness ho and a feedstock speed o on the inlet side.
- the rolling stock 6 leaves the rolling stand 4 with a ⁇ did neuter auslaufseifigen rolling stock vi and ei ⁇ ner expiring rolling stock thickness hi.
- the roller 8 rotates in the rolling process with a roller speed v w .
- the leak-side rolling stock vi can not be measured reliably ge ⁇ nug.
- the rolling mill 4 is associated with a mass flow controller 10, which regulates the setting of a variable roll gap 12 - indicated by a thickness arrow - in the roll stand 4.
- the mass flow controller 10 uses the modeled outlet-side rolling stock vi 'for the roll gap control. According to the
- This invention is formed from the roller speed v w and egg ⁇ ner modeled lead s' according to.
- the modeled lead s' is the sum of a base value s G and a correction value s K.
- the correction value s K is formed according to the invention from a measured value M determined during the rolling process.
- G the one in the rolling mill, for example EXISTING ⁇ which list or a rolling model entnom- men not shown .
- the rolling stock speed vi thus approaches the real rolling stock speed vi.
- the mass flow controller 10 is better able to adjust the nip 12 to the roll stand 4 embarkre ⁇ rules.
- the actual leaking rolling ⁇ thick approaches hi a setpoint hi S. 2 shows a larger section of the rolling mill 2, and an example of the determination of a measured value M.
- the value M is here ⁇ measuring the rolling 6 - or its at a certain portion 15 - determined. Shown are two nachein ⁇ other lying - not necessarily adjacent rolling stands 4, which are traversed by rolling stock 6 in the direction of arrow 14.
- the respective times of the punctures of the rolling stock 6 on the respective rolling stand 4 are the times ti, 2 .
- the actual stand spacing d of the two rolling stands 4 as the distance of the piercing points of the rolling train.
- Measured now is measured value M, a time difference T, in which section 15 covers a specific distance 17 in the rolling train with the two rolling stands 4.
- ⁇ section 15 of the head 16 of the rolling stock 6 is selected, as a distance 17 of the stand distance d.
- the time difference t2 _ ti, and an integral of the Wal ⁇ zen Industries v w from the time tl to the time t2.
- This provides an imaginary length 1, with a head 16 of the rolling stock 6 protrudes from the first stand 4.
- the conceived length 1 does not correspond to reality, since the real
- a comparison of the length 1 with the actual frame distance d provides an actual overfeed s and thus a Cor ⁇ rekturwert K s for the basic value G s.
- 3 shows an alternate mass flow controller 10, which an actually measured outlet-side rolling speed VI ⁇ M is supplied as a measured value M. This is determined on the rolling stock 6 by means of a Walzgut yorksmess worn 18.
- the mass flow controller 10 includes a Voreilungs- adaptation controller 20, which the actual Walzengeschwindig ⁇ velocity v w, the measured rolling stock v iM and the determined ge ⁇ Gurss above adapted overfeed s are supplied '.
- a controlled overrun s R is determined, which then passes through a limitation and plausibility stage 22.
- the correction value s K generated is again finely tuned in the lead s' by the lead adaptation controller 20 and the limitation and plausibility check stage 22 in order to produce a modeled overfeed s', which in some circumstances would be even better adapted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12756184.3A EP2739411B1 (de) | 2011-10-13 | 2012-09-05 | Verfahren zur ermittlung einer walzgutgeschwindigkeit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11185033.5A EP2581142A1 (de) | 2011-10-13 | 2011-10-13 | Verfahren zur Ermittlung einer Walzgutgeschwindigkeit |
| EP12756184.3A EP2739411B1 (de) | 2011-10-13 | 2012-09-05 | Verfahren zur ermittlung einer walzgutgeschwindigkeit |
| PCT/EP2012/067333 WO2013053549A1 (de) | 2011-10-13 | 2012-09-05 | Verfahren zur ermittlung einer walzgutgeschwindigkeit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2739411A1 true EP2739411A1 (de) | 2014-06-11 |
| EP2739411B1 EP2739411B1 (de) | 2016-06-08 |
Family
ID=46801502
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11185033.5A Withdrawn EP2581142A1 (de) | 2011-10-13 | 2011-10-13 | Verfahren zur Ermittlung einer Walzgutgeschwindigkeit |
| EP12756184.3A Active EP2739411B1 (de) | 2011-10-13 | 2012-09-05 | Verfahren zur ermittlung einer walzgutgeschwindigkeit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11185033.5A Withdrawn EP2581142A1 (de) | 2011-10-13 | 2011-10-13 | Verfahren zur Ermittlung einer Walzgutgeschwindigkeit |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2581142A1 (de) |
| CN (1) | CN103874551B (de) |
| WO (1) | WO2013053549A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09239417A (ja) * | 1996-03-11 | 1997-09-16 | Toshiba Corp | 熱間圧延機の制御装置 |
| JP2000094022A (ja) * | 1998-09-14 | 2000-04-04 | Toshiba Corp | 通板速度制御装置 |
| JP3615996B2 (ja) * | 2000-07-06 | 2005-02-02 | 東芝三菱電機産業システム株式会社 | 連続圧延機の板厚制御方法、パススケジュール算出方法及び板厚制御装置 |
| JP2002028710A (ja) * | 2000-07-12 | 2002-01-29 | Sumitomo Metal Ind Ltd | 連続圧延方法 |
| DE10254178B4 (de) * | 2002-11-21 | 2011-10-13 | Abb Ag | Verfahren zur Ermittlung von Zustandsgrößen eines Walzprozesses |
| CN100493748C (zh) * | 2006-09-20 | 2009-06-03 | 宝山钢铁股份有限公司 | 利用前滑自适应动态修正带钢厚度偏差的控制方法 |
| DE102008007057A1 (de) * | 2008-01-31 | 2009-08-13 | Siemens Aktiengesellschaft | Regelverfahren für eine Kaltwalzstraße mit vollständiger Massenflussregelung |
| EP2135690A1 (de) * | 2008-06-19 | 2009-12-23 | Siemens Aktiengesellschaft | Konti-Walzstrasse mit Ein- und/oder Ausgliedern von Walzgerüsten im laufenden Betrieb |
| EP2298461A1 (de) * | 2009-09-17 | 2011-03-23 | Siemens Aktiengesellschaft | Kaltwalzstraße mit Massenflussregelung an einem Walzgerüst |
-
2011
- 2011-10-13 EP EP11185033.5A patent/EP2581142A1/de not_active Withdrawn
-
2012
- 2012-09-05 WO PCT/EP2012/067333 patent/WO2013053549A1/de not_active Ceased
- 2012-09-05 CN CN201280050250.5A patent/CN103874551B/zh active Active
- 2012-09-05 EP EP12756184.3A patent/EP2739411B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013053549A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103874551B (zh) | 2016-05-11 |
| CN103874551A (zh) | 2014-06-18 |
| EP2581142A1 (de) | 2013-04-17 |
| EP2739411B1 (de) | 2016-06-08 |
| WO2013053549A1 (de) | 2013-04-18 |
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