EP3713686B1 - Dispositif servant à commander un laminoir étireur-réducteur - Google Patents

Dispositif servant à commander un laminoir étireur-réducteur Download PDF

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Publication number
EP3713686B1
EP3713686B1 EP18807600.4A EP18807600A EP3713686B1 EP 3713686 B1 EP3713686 B1 EP 3713686B1 EP 18807600 A EP18807600 A EP 18807600A EP 3713686 B1 EP3713686 B1 EP 3713686B1
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EP
European Patent Office
Prior art keywords
wall thickness
tube
motors
stretch
rotational speed
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.)
Active
Application number
EP18807600.4A
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German (de)
English (en)
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EP3713686A1 (fr
Inventor
Alexander Gohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
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SMS Group GmbH
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Publication date
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Publication of EP3713686A1 publication Critical patent/EP3713686A1/fr
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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
    • B21B37/78—Control of tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/10—Cross-sectional area
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/72—Rear end control; Front end control

Definitions

  • the invention relates to a method for controlling a stretch-reducing mill according to the preamble of claim 1.
  • the process causes the tube wall thickness to thicken or upset at the tube ends compared to the central part of the tube. This is due to the fact that at the front or rear end of the tube, due to the rolling stands not being in engagement with the rolling stock either ahead or behind in the conveying direction, the longitudinal rolling tension otherwise achieved in the tube center part is not achieved.
  • the pipe sections that are thicker than the permissible wall thickness tolerance are a loss of yield and must be cut off.
  • the mother tubes or shells used can have upset wall thicknesses at the ends, e.g. as a result of tool wear in the upstream units. This upsetting of the mother pipes causes an additional thickening of the finished pipe ends.
  • End loss control has achieved practical and widespread importance by dynamically varying the motor or roller speeds as the pipe ends pass through the mill.
  • the speed ratio between the roll calibers closest to the end of the pipe is increased and thus an increased rolling tension is applied.
  • the particular challenge is, on the one hand, to bring about the speed changes mentioned in good time, since otherwise they have no effect on the thickening of the ends.
  • the magnitude of the speed change and the transition to steady-state speeds must be precisely matched, since otherwise the sections adjacent to the pipe ends may fall below the target wall thickness in an inadmissible manner.
  • the situation is further complicated by the fact that the speed curves of up to 32 drive motors have to be adjusted. It is not possible to determine theoretical speed curves in advance that achieve the best possible shortening of the thickened ends without further adjustment.
  • the manual setting of the speed curves is a difficult and time-consuming procedure for the operating teams.
  • the generic JP H07246414 A describes an automatic adjustment of engine speeds based on pipe measurement data. However, the deployment times and the duration of the effect are not adjusted. However, both have a high influence on the control result. In addition, the influence of the incoming pipe is not taken into account. Likewise, a combination of several rolls to minimize the influence of measurement errors or outliers is not listed
  • DE-A1-38 19 571 describes a method for controlling wall thickness when stretch-reducing tubes. There is no provision for changing speeds in such a way that the time profile of the speed changes of individual or all motors is automatically adjusted based on the pipe wall thickness measurements.
  • a disadvantage of the prior art is that the rolling mill operators usually have to make correction settings on the CEC in practical operation, or at least at the beginning of a rolling campaign. If necessary, adjustments must also be made within a rolling campaign, e.g. due to tool wear.
  • a CEC independently monitors and evaluates the wall thickness results achieved at the pipe ends and resets the strength and timing of the speed change at the pipe ends for the following pipes.
  • the course of the speeds over time is characterized by the start time of the speed change and the end point of the speed change. It is provided that the course over time is characterized by the start time or end time and a rate of change.
  • the evaluation of the wall thickness progression is carried out on at least three sections of the wall thickness profile.
  • the evaluation of the wall thickness progression is carried out from a number of target variables.
  • the wall thickness profiles at the ends can be examined for cyclical patterns, such patterns being taken into account when controlling the motors.
  • a measurement of an incoming shell wall thickness profile can be carried out, with the magnitudes and the time progression of the speed changes of the tube end control being adapted to shell wall thickness measured values. In this way, intervention is made very early on in the forming of a shell into a tube as the end product with the aim of improving the tube end diameter.
  • the wall thickness profiles at the ends of the shells can be examined for cyclical patterns and such patterns can also be taken into account.
  • Another measure that improves the invention consists in an automatic puncture detection.
  • a further measure that improves the invention consists in taking into account the actual wall thickness profiles at the ends of the incoming mother pipes.
  • a further measure that improves the invention consists in specifying target or ideal shapes of the pipe ends of each dimension.
  • Another measure that improves the invention consists in using pattern-recognizing algorithms to evaluate the course of the wall thickness of each pipe end.
  • a further measure that improves the invention consists in a simulation for the precalculation of the effect of a change in setting.
  • Another measure that improves the invention consists in iterating the CEC setting over several loops to find a stable optimum
  • a stretch-reducing mill comprises several rolls in roll stands 1, which are driven by controllable motors.
  • the stretch-reducing of a rolling stock 2 is carried out by targeted control of the motors at different speeds, so that the rolling stock is placed under tensile stress between the rolls.
  • the motors are supplied with electrical energy via a programmable logic controller (PLC) 3 .
  • PLC programmable logic controller
  • the PLC 3 takes over the query and/or calculation of the speeds of the motors during the rolling process.
  • the PLC 3 is connected to sensors 5, 6 via a network 4 in the form of a fieldbus system, so that measured values flow directly into the PLC.
  • the sensors 5 are, for example, position sensors, for example in the form of light barriers.
  • the sensors 6 determine further measured values for monitoring the rolling process, in particular the diameter, wall thickness and temperature of the rolling stock.
  • the PLC 3 can also communicate with a process control computer 7a of a process control level via a network 7 that is not capable of real-time.
  • a method according to the invention for controlling a stretch-reducing mill can be carried out on a stretch-reducing mill described above by way of example will.
  • the tube ends of stretched tubes are optimized by controlling one or more motors of the stretch-reducing mill.
  • At least one wall thickness measurement is carried out on the outlet side by the sensors 6 and the magnitude of a change in the speed of the motors is automatically adapted to the measured pipe wall thickness profile.
  • the time course of the speed changes of individual or all motors is automatically adjusted on the basis of the measured pipe wall thickness values.
  • the course of the speeds over time is characterized by the start time of the speed change and the end point of the speed change.
  • the course over time is also characterized by a rate of change of the speeds.
  • An evaluation of the wall thickness progression is carried out on at least three sections of the wall thickness profile.
  • the evaluation of the wall thickness progression is made from several target values.
  • the process for controlling the tube end thickness is combined with a wall thickness control system for automatically controlling the wall thickness outside the thickened ends.
  • the measured values from the sensors 6 are analyzed using programs, the wall thickness profiles at the ends being examined for cyclical patterns and such patterns being taken into account when controlling the motors.
  • an incoming shell wall thickness profile is measured, with the magnitudes and the time curves of the speed changes of the tube end control being adapted to shell wall thickness measurements.
  • the wall thickness gradients at the end of the shell are examined for cyclical patterns and such patterns are also taken into account.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Claims (8)

  1. Procédé de commande d'un laminoir étireur-réducteur, dans lequel les extrémités des tubes étirés sont optimisées par la commande d'un ou de plusieurs moteurs du laminoir étireur-réducteur (1), comprenant au moins une mesure de l'épaisseur de la paroi côté sortie et une adaptation automatique de la grandeur d'une variation de la vitesse des moteurs au profil d'épaisseur de la paroi du tube,
    caractérisé en ce que
    l'évolution dans le temps des variations de vitesse de certains ou de tous les moteurs est également adaptée automatiquement sur la base des valeurs de mesure de l'épaisseur de la paroi du tube,
    l'évolution dans le temps des vitesses de rotation étant caractérisée par l'instant de début de la variation de la vitesse de rotation et par l'instant de fin de la variation de la vitesse de rotation,
    l'évolution dans le temps étant caractérisée par l'instant de début ou l'instant de fin et un taux de variation.
  2. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'évaluation de la variation de l'épaisseur de la paroi est effectuée sur au moins trois sections du profil d'épaisseur de la paroi.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'évaluation de la variation de l'épaisseur de la paroi est effectuée à partir de plusieurs grandeurs cibles.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le procédé est combiné avec un système de contrôle de l'épaisseur de la paroi pour contrôler automatiquement l'épaisseur de la paroi en dehors des extrémités épaissies.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la variation de l'épaisseur de la paroi aux extrémités est examinée pour déceler des modèles cycliques et que de tels modèles sont pris en compte lors de la commande des moteurs.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une mesure d'un profil d'épaisseur de paroi de loupe en entrée est effectuée, les grandeurs et l'évolution dans le temps des variations de vitesse de la commande d'extrémité de tube étant adaptées aux valeurs de mesure de l'épaisseur de paroi de loupe.
  7. Procédé selon la revendication 6, caractérisé en ce que les variations de l'épaisseur de paroi aux extrémités des loupes sont examinées pour déceler des modèles cycliques et que de tels modèles sont pris en compte.
  8. Procédé selon l'une des revendications 6 ou 7, caractérisé en ce que le procédé est combiné avec un système de contrôle de l'épaisseur des parois pour contrôler automatiquement l'épaisseur des parois en dehors des extrémités épaissies.
EP18807600.4A 2017-11-21 2018-11-20 Dispositif servant à commander un laminoir étireur-réducteur Active EP3713686B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017220750.7A DE102017220750A1 (de) 2017-11-21 2017-11-21 Vorrichtung zur Steuerung eines Streckreduzierwalzwerks
PCT/EP2018/081896 WO2019101727A1 (fr) 2017-11-21 2018-11-20 Dispositif servant à commander un laminoir étireur-réducteur

Publications (2)

Publication Number Publication Date
EP3713686A1 EP3713686A1 (fr) 2020-09-30
EP3713686B1 true EP3713686B1 (fr) 2022-10-05

Family

ID=64453488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18807600.4A Active EP3713686B1 (fr) 2017-11-21 2018-11-20 Dispositif servant à commander un laminoir étireur-réducteur

Country Status (8)

Country Link
US (1) US11602779B2 (fr)
EP (1) EP3713686B1 (fr)
CN (1) CN111372694A (fr)
DE (1) DE102017220750A1 (fr)
ES (1) ES2934481T3 (fr)
MX (1) MX2020005173A (fr)
RU (1) RU2748571C1 (fr)
WO (1) WO2019101727A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018217378B3 (de) * 2018-10-11 2020-03-26 Sms Group Gmbh Wanddickenkontrolle beim Streckreduzieren von Rohren
CN113996663B (zh) * 2021-12-31 2022-03-11 太原科技大学 无缝管张力减径工艺减径率分配修正方法及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643659A1 (de) 1986-12-18 1988-07-07 Mannesmann Ag Verfahren zur steuerung der rohrwanddicke
JPH06269831A (ja) 1993-03-23 1994-09-27 Sumitomo Metal Ind Ltd ストレッチレデューサの管端肉厚制御方法
JPH07246414A (ja) 1994-03-10 1995-09-26 Nkk Corp ストレッチレデューサーの管端部肉厚制御方法
JP2001001019A (ja) 1999-06-24 2001-01-09 Sumitomo Metal Ind Ltd マンドレルミルによる素管の圧延方法及びマンドレルミル
JP2004337941A (ja) 2003-05-16 2004-12-02 Sumitomo Metal Ind Ltd 金属管製造装置および金属管の肉厚制御方法

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Publication number Priority date Publication date Assignee Title
DE1602181B2 (de) 1967-10-06 1971-11-18 Stahl- und Röhrenwerk Reisholz GmbH, 4000 Düsseldorf Verfahren zur Verringerung verdickter Enden beim Streckreduzierwalzen von Rohren
FR2070965A5 (fr) 1969-12-12 1971-09-17 Nippon Kokan Kk
DE2347891C2 (de) 1973-09-24 1983-04-21 Kocks Technik Gmbh & Co, 4010 Hilden Walzstraße zum Streckreduzieren von Rohren
US4002048A (en) 1975-12-19 1977-01-11 Aetna-Standard Engineering Company Method of stretch reducing of tubular stock
SU715159A1 (ru) 1977-03-09 1980-02-15 Предприятие П/Я А-7697 Устройство дл регулировани толщины стенки труб при редуцировании
DE2947233C2 (de) * 1979-11-23 1992-03-12 Kocks Technik Gmbh & Co, 4010 Hilden Vorrichtung zur Steuerung der Wanddicke von Rohren
DE3028211C2 (de) 1980-07-25 1986-10-16 Kocks Technik Gmbh & Co, 4010 Hilden Walzstraße zum Streckreduzieren von Rohren
JPS6021114A (ja) * 1983-07-18 1985-02-02 Kawasaki Steel Corp 鋼管絞り圧延機の肉厚制御方法
JPS62124007A (ja) * 1985-11-20 1987-06-05 Kawasaki Steel Corp ストレツチレデユ−サの伸し長さ制御方法
DE3819571A1 (de) * 1988-06-06 1989-12-07 Mannesmann Ag Verfahren zur regelung der wanddicke beim streckreduzieren von rohren
DE19840864C1 (de) * 1998-08-31 1999-07-29 Mannesmann Ag Verfahren zur Minimierung verdickter Enden beim Walzen von Rohren in einem Streckreduzierwalzwerk
DE10157742C1 (de) * 2001-11-24 2003-06-18 Sms Meer Gmbh Verfahren zum Betreiben eines Streckreduzierwalzwerks und Streckreduzierwalzwerk
DE10201717C1 (de) * 2002-01-18 2003-04-10 Sms Meer Gmbh Verfahren und Vorrichtung zum Walzen eines Rohres
JP4013659B2 (ja) 2002-06-13 2007-11-28 住友金属工業株式会社 管圧延機の肉厚制御方法
DE602005024782D1 (de) 2004-03-30 2010-12-30 Sumitomo Metal Ind Verfahren und vorrichtung zur steuerung des walzens von rohren mit festem durchmesser
CN100534656C (zh) 2007-03-29 2009-09-02 宝山钢铁股份有限公司 张减机钢管增厚端控制方法
CN204523791U (zh) 2015-03-15 2015-08-05 邯郸市卓立精细板材有限公司 一种带钢厚度实时检测装置
DE102015118065A1 (de) 2015-10-22 2017-04-27 Hans Joachim Pehle Verfahren zur Drehzahlanpassung von kontinuierlichen Rohrwalzwerken
CN206253457U (zh) 2016-12-12 2017-06-16 江苏飞翔精密机械制造有限公司 热轧钢管壁厚调节装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643659A1 (de) 1986-12-18 1988-07-07 Mannesmann Ag Verfahren zur steuerung der rohrwanddicke
JPH06269831A (ja) 1993-03-23 1994-09-27 Sumitomo Metal Ind Ltd ストレッチレデューサの管端肉厚制御方法
JPH07246414A (ja) 1994-03-10 1995-09-26 Nkk Corp ストレッチレデューサーの管端部肉厚制御方法
JP2001001019A (ja) 1999-06-24 2001-01-09 Sumitomo Metal Ind Ltd マンドレルミルによる素管の圧延方法及びマンドレルミル
JP2004337941A (ja) 2003-05-16 2004-12-02 Sumitomo Metal Ind Ltd 金属管製造装置および金属管の肉厚制御方法

Also Published As

Publication number Publication date
ES2934481T3 (es) 2023-02-22
DE102017220750A1 (de) 2019-05-23
RU2748571C1 (ru) 2021-05-26
WO2019101727A1 (fr) 2019-05-31
CN111372694A (zh) 2020-07-03
US20200391263A1 (en) 2020-12-17
EP3713686A1 (fr) 2020-09-30
US11602779B2 (en) 2023-03-14
MX2020005173A (es) 2020-08-20

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