EP2861360A1 - Verfahren zum bearbeiten von walzgut in einem walzwerk - Google Patents
Verfahren zum bearbeiten von walzgut in einem walzwerkInfo
- Publication number
- EP2861360A1 EP2861360A1 EP13729682.8A EP13729682A EP2861360A1 EP 2861360 A1 EP2861360 A1 EP 2861360A1 EP 13729682 A EP13729682 A EP 13729682A EP 2861360 A1 EP2861360 A1 EP 2861360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- rolling
- torque
- load
- current
- 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
- 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
Definitions
- a method of machining rolled stock in a rolling mill the invention relates to a method of machining rolled in a rolling mill comprising at least one drive end toward ⁇ rolling stand.
- the rolling stock passes through a rolling mill with one or more ⁇ ren roll stands.
- the individual rolling stands each have a drive for rollers, with which the rolling stock to Plat ⁇ th or wires with a desired geometry, such as thickness or cross section is rolled.
- the rollers using the drives of the individual rolling stands must be ge ⁇ controlled at a certain speed. It is also important that during the entire operation of the rolling mill and the predetermined Ver ⁇ ratio of the speeds of the rollers of the individual rolling stands remains constant, otherwise tensile and compressive loads on the rolling occur, which in turn lead to an unwanted rolling result or even to a Tearing or looping of the rolling stock can lead.
- a rolling mill at least one an on ⁇ drive exhibiting roll stand, in which by the current supplied to the drive torque generating current is carried out for reducing a speed break-in caused by an acting on the drive predictable load torque of the drive, a rolling torque feedforward control of the drive.
- the occurrence of a foreseeable load torque is reduced by a rolling torque pilot control of the torque-generating current supplied to the drive.
- suitable parameters such as roll gap geometry, position and characteristics of material sensors, distance of the individual rolling stands or roller and material speeds are used, with which it can be determined when the load torque and at what level it acts on the relevant drive.
- the corresponding values including the amount of foreseeable load torque may be determined at the pitch ⁇ means of a model of the mill.
- the current supplied to the drive can then be selectively controlled in such a way that a reduction in the rotational speed of the drive associated with the occurrence of the load torque is reduced.
- a kon ⁇ trollierter operation of the drives or the rolls of the individual roll stands and thus also of the entire system is provided ⁇ guaranteed. It is therefore no longer to individual tensile or compressive loads due to strong speed fluctuations of the individual drives or rollers of different rolling stands.
- variations in thickness are reduced and a Rei ⁇ Shen the rolling stock or looping largely avoided. This is especially true when the rolling mill ⁇ factory has multiple stands with separate drives and each drive is individually pre-controlled.
- the predictable load torque is ⁇ values by evaluating the actual, corrected it from ⁇ guided Beministerungsistute in particular, torque, speed, and. This results in a dynamic correction in the position of the tape head. By observer models the height of the Lastmo ⁇ ments can be dynamically corrected in addition. In repeating processes with the same material is carried out by evaluating the deviation between the pilot values for the foreseeable load torque and the actual load torque an iterative optimization Opti ⁇ for correcting the AufschaltZeitilss and an iterative correction of the amount of the predictable load torque.
- the feedforward control is material-based. This means that even Materi ⁇ alparameter such as the hardness or the influencing factors such as temperature and type of material first be taken into account how high the predictable load ⁇ moment on the relevant drive acts so that, in response to which the drive pilot accordingly and thus the supplied Electricity is changed.
- the current is not leaps and bounds, but increasing, within a time window continuously, in particular increases ramped for pre-control of the drive.
- the corresponding torque of the drive is changed only relatively slowly, so ramped.
- the ramp can also be preset in steps
- the slope of the ramp for the torque is dimensioned such that the drive train remains in a defined and reproducible state at any time.
- the Begren ⁇ wetting of the rise of the current is effected with a corresponding ⁇ the ramped increase in the current command value and may in- take place directly via a torque or speed precontrol.
- the steepness of the ramp depends on the dynamics of the power converter. Play inverter type, operating point and the design of the converter, in particular the amount of Aid ⁇ formative stream, the speed and the voltage reserve a role. With high reproducibility, the slope corresponds to an average value that can be achieved at the specified operating points. For complete reproducibility, the slope of the ramp or staircase must be smaller than the possible maximum slope that the converter can provide over all specified operating points. The setpoint increase then does not exceed the achievable dynamics of the converter at the voltage limit at nominal motor voltage and maximum power. This eliminates deviations of the converter behavior in different operating points. Thus, a highly accurate and predictable pre-control at high speeds Ge ⁇ is possible.
- the reproducible operation enables light-interpolation, a very precise analysis of Träg ⁇ units in addition a dynamic statement about the occurring load torque for dynamic correction of the material position and load height.
- the ramp is designed such that the increase in torque of the drive achieved by the current increase causes a symmetrically acting deviation, so that the speed increase to the occurrence of the load and the delay after the occurrence of the load cancel until the complete build-up of the torque. With a sudden load and a constant ramp, the torque upshift is thus realized halfway before and the other half after the load torque has occurred.
- a feedforward control is finished prior to entry of the material into the Fol ⁇ gegerüst when the rise time between contact of the load up to a complete connection of the torque value of the frame interval divided by Materialge ⁇ speed does not exceed.
- a ⁇ operate symmetrically the deviation corresponding to the twice the time required for the Ma ⁇ TERIAL when passing between two stands.
- FIG 3 shows a diagram in which the corresponding speed curve of the drives is shown by the action of the variables shown in FIG 2 in the time course 1 shows a section of a rolling mill train 2 having alseinan ⁇ of the following roll stands 4 for machining a rolled 6.
- FIG 1 are exemplary eight successive roll ⁇ scaffolding 4 shown, which, for example, a billet is rolled into wire passes through the rolling stock 6.
- Each mill stand 4 is a separate drive 8, comprising ei ⁇ nen motor 10 and a gearbox 12 assigned, wherein in the Fi ⁇ gur for clarity, only one drive 8 is hinted tet.
- the drive is supplied by means of a power converter 14 with a control unit 16, a desired current I.
- Je ⁇ the roll stand 4 further comprises at least one roller 13, which is driven by the respective drive 8 with a predetermined speed n, which is taken for example from a pass schedule.
- the rotational speed reduction caused by a load moment M L acting on the drive 8 is reduced by the drive 8 being adjusted by means of the control unit.
- direction 16 and the power converter 14 is precontrolled with respect to its supplied current I.
- the load torque M L can be known or estimated, that is, a predictable size. For example, based on models of the rolling mill 2 as well as known sizes of the rolling stock 6 to be rolled, a corresponding expected value of the load torque M L acting on a drive 8 of a rolling stand 4 can be determined. This expectation value is determined over time so that the load moment M L for a particular drive 8 of a roll stand 4 is predicted over time. Depending on the foreseeable load torque M L , the rolling torque precontrol of the drive 8 is then effected by the torque-forming current I supplied to the drive such that a fall in the rotational speed of the drive 8 is compensated. For actuators which drive different from the pre ⁇ zugswishing more than a rolling stand 4, the determined over time engine-related load torque M L reflects the sum of the individual motor-related me rolling moments are.
- FIG 2 is now by way of example for two rolling stands, each with 4 ⁇ wells associated therewith a drive 8 of the temporal course of impinging thereon load torques M L and the actuators 8 this current I supplied to the corresponding
- Control variable namely the current setpoint shown over time.
- Curve 18 represents a sudden change of the load moment M L on the drive 8 of the first stand 4 at time t 2
- curve 20 represents a jump of the load moment M L on the drive 8 of the second stand 4 at time t7.
- the ramp for the current setpoint as well as for the current I is so des ⁇ sen that the drive 8 remains in a stable state, which is also reproducible, that is, the increase of the current setpoint and the current I is so slow that the Drive 8 has a defined operating behavior ⁇ . More specifically, the ramp of the current I is such ges ⁇ taltet that achieved by the current increase torque ⁇ increase in the drive 8 for a half before and half after the occurrence of the load torque M L is realized.
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 |
---|---|---|---|
EP13729682.8A EP2861360B1 (de) | 2012-07-27 | 2013-06-12 | Verfahren zum bearbeiten von walzgut in einem walzwerk |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12178196.7A EP2689864A1 (de) | 2012-07-27 | 2012-07-27 | Verfahren zum Bearbeiten von Walzgut in einem Walzwerk |
EP13729682.8A EP2861360B1 (de) | 2012-07-27 | 2013-06-12 | Verfahren zum bearbeiten von walzgut in einem walzwerk |
PCT/EP2013/062141 WO2014016043A1 (de) | 2012-07-27 | 2013-06-12 | Verfahren zum bearbeiten von walzgut in einem walzwerk |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2861360A1 true EP2861360A1 (de) | 2015-04-22 |
EP2861360B1 EP2861360B1 (de) | 2016-11-02 |
Family
ID=46845596
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12178196.7A Withdrawn EP2689864A1 (de) | 2012-07-27 | 2012-07-27 | Verfahren zum Bearbeiten von Walzgut in einem Walzwerk |
EP13729682.8A Revoked EP2861360B1 (de) | 2012-07-27 | 2013-06-12 | Verfahren zum bearbeiten von walzgut in einem walzwerk |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12178196.7A Withdrawn EP2689864A1 (de) | 2012-07-27 | 2012-07-27 | Verfahren zum Bearbeiten von Walzgut in einem Walzwerk |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP2689864A1 (de) |
CN (1) | CN104428075B (de) |
WO (1) | WO2014016043A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107716564B (zh) * | 2017-10-27 | 2019-04-23 | 宝钢特钢韶关有限公司 | 棒线材连轧轧件检测方法及检测装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE757704C (de) | 1937-10-10 | 1953-03-23 | Siemens Schuckertwerke A G | Einrichtung zur Drehzahlregelung der Antriebsmotoren einer kontinuierlichen Walzenstrasse |
JPS6099416A (ja) | 1983-11-04 | 1985-06-03 | Mitsubishi Electric Corp | 圧延機の速度制御装置 |
JPH04145886A (ja) * | 1990-10-02 | 1992-05-19 | Toshiba Corp | 電動機の速度制御装置 |
JPH04361813A (ja) | 1991-06-07 | 1992-12-15 | Kobe Steel Ltd | 圧延ラインにおける圧延材噛込速度制御方法 |
JPH06218416A (ja) | 1993-01-22 | 1994-08-09 | Kawasaki Steel Corp | 圧延機の速度制御方法及び装置 |
AT406233B (de) * | 1995-07-31 | 2000-03-27 | Gfm Gmbh | Verfahren zum regeln des walzgutdurchlaufes durch eine kontinuierliche walzstrasse |
DE19633213A1 (de) * | 1996-08-17 | 1998-02-19 | Schloemann Siemag Ag | Regelverfahren |
DE19653182A1 (de) * | 1996-12-20 | 1998-06-25 | Siemens Ag | Antriebseinrichtung für Walzgerüste |
DE19726586A1 (de) * | 1997-06-23 | 1999-01-07 | Siemens Ag | Verfahren und Einrichtung zur Verringerung bzw. Kompensation von Drehzahleinbrüchen beim Einfädeln eines Walzgutes in ein Walzgerüst |
JP2005046898A (ja) | 2003-07-31 | 2005-02-24 | Jfe Steel Kk | 圧延機の速度制御方法 |
JP2005254289A (ja) | 2004-03-12 | 2005-09-22 | Jfe Steel Kk | 圧延機の速度制御方法 |
CN100441328C (zh) * | 2006-01-25 | 2008-12-10 | 冶金自动化研究设计院 | 一种抑制轧机传动系统动态速降和扭振的控制系统 |
DE102009050710B4 (de) | 2009-10-26 | 2016-08-04 | Sms Group Gmbh | Drahtwalzgerüst mit Einzelantrieb |
-
2012
- 2012-07-27 EP EP12178196.7A patent/EP2689864A1/de not_active Withdrawn
-
2013
- 2013-06-12 CN CN201380036366.8A patent/CN104428075B/zh not_active Expired - Fee Related
- 2013-06-12 EP EP13729682.8A patent/EP2861360B1/de not_active Revoked
- 2013-06-12 WO PCT/EP2013/062141 patent/WO2014016043A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014016043A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN104428075B (zh) | 2016-07-27 |
WO2014016043A1 (de) | 2014-01-30 |
EP2689864A1 (de) | 2014-01-29 |
CN104428075A (zh) | 2015-03-18 |
EP2861360B1 (de) | 2016-11-02 |
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