EP1314491B1 - Verfahren zum Betreiben eines Streckreduzierwalzwerks und Streckreduzierwalzwerk - Google Patents
Verfahren zum Betreiben eines Streckreduzierwalzwerks und Streckreduzierwalzwerk Download PDFInfo
- Publication number
- EP1314491B1 EP1314491B1 EP02022590A EP02022590A EP1314491B1 EP 1314491 B1 EP1314491 B1 EP 1314491B1 EP 02022590 A EP02022590 A EP 02022590A EP 02022590 A EP02022590 A EP 02022590A EP 1314491 B1 EP1314491 B1 EP 1314491B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll stand
- tube
- outlet side
- roll
- drive
- 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 - Lifetime
Links
Images
Classifications
-
- 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
- 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
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/18—Presence of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/20—Track of 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
- B21B2275/04—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
- B21B2275/02—Speed
- B21B2275/06—Product speed
-
- 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
- B21B35/025—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills for stretch-reducing of tubes
Definitions
- the invention relates to a method for operating a stretch-reducing mill for rolling a tube of finite length, which has at least two roll stands has, which are arranged one behind the other in the conveying direction of the tube, wherein at least two co-operating rollers are arranged in each roll stand are, each over a defined peripheral portion of the tube on this apply and roll it, and at least two drives for driving the Rolling two different roll stands are available. Furthermore concerns the invention an apparatus for performing the method. On A generic method and a generic device are e.g. known from document DE-A 3601693.
- the pipe to be processed passes a rolling mill, a number of roll stands in succession in the conveying direction of the tube are arranged. Rolls are stored in each roll stand, which are given priority in the rolling process contact the pipe with a defined circumferential section. Overall, several, usually three, rollers act in this way in each roll stand together that the tube is essentially over its entire circumference of is enclosed in the rollers. The pipe is thus reduced in diameter rolled.
- the rolling mill usually has one group or several groups of rolling stands, whose rollers are driven by a common drive.
- the drive comprises two motors (basic drive and superimposed drive), whose rotation in a summation gear is added up in such a way that the required increase the rolling speed in rolling stands arranged one behind the other results.
- Sawing devices are often arranged behind the rolling mill, with which the rolled pipe can be cut to length.
- the sawing devices are mostly executed as "flying saws", which means that during the sawing process run with the conveying speed of the pipe; d. H. the sawing process can be done while the pipe is being transported.
- the rolling mill manipulators robots
- a pusher serve on the cooling bed.
- the invention is therefore based on the object of providing a stretch-reducing rolling method of the type mentioned at the outset and an associated device with which or with which it is possible to reduce the existing disadvantages or to eliminate them entirely.
- the proposed active outlet speed control or regulation it can be achieved to prevent the so-called "spit-out effect", which in consequently enables high quality to be achieved in the succession processes; in particular, the cutting tolerances during the sawing process are improved.
- the proposed method reduces or eliminates the period in which the "spit-out effect" is to be expected (ie during the acceleration phase to be feared), the motor speed of the basic and superimposed drive in the rear scaffolding group, which ensures a constant outlet speed of the Pipe from the rolling mill is ensured.
- the point in time at which the Conveying direction at the rear end of the pipe is the roll stand or stand group on the outlet side leaves is determined from observation or monitoring of the point in time passing the rear end of the pipe at the outlet end Rolling mill upstream in the conveying direction, taking into account the Rolling speed of the pipe from the monitoring point to the last one Rolling stand.
- the stretch-reducing mill according to the invention for carrying out the method has at least two roll stands with rollers, at least two drives for driving the rolls of two different roll stands are.
- means for determining the point in time, to which the rear end of the pipe in the conveying direction is in the conveying direction Leaving mill stand leaves, are available as well as means for control or Regulating the drive of the roll stand on the outlet side so that during the duration a drive of the rollers of the outlet side of a predetermined time interval Roll stand with reduced speed.
- one is in the conveying direction in front of the roll stand on the outlet side Sensor arranged to detect the time of passing the end of the pipe is suitable. Furthermore, the sensor can send its measured signal to a Control or regulation transmit on the drive of the outlet side Acts on the roll stand.
- At least the drive of the roll stands last arranged in the conveying direction of the stretch-reducing mill can be designed as an overall superposition drive be, which has a summation gear and two motors. From the drive that drives the mill stands last arranged in the conveying direction can at least three rolling stands are driven.
- a sawing device is preferred in the conveying direction behind the outlet-side roll stand is arranged; this can have a "flying saw”. Further an automatic manipulator can be arranged behind the last rolling stand his.
- rollers 4, 5 and 6 or 4 ', 5' and 6 'roll a tube 2 in a stretch-reducing mill The rollers 4, 5 and 6 belong to a first roll stand 3a, while the rolls 4 ', 5' and 6 ' belong to a second roll stand 3b. Both mill stands 3a and 3b belong again to a first group of roll stands of the stretch-reducing mill, such as described below. So that a tube 2 with a finite length L at Pass through the stretch-reducing mill over its entire circumference is rolled evenly, the rolls of two successive roll stands 3a, 3b each rotated by 60 ° around the tube axis, as is shown in FIGS. 1 and 2 is clearly visible.
- Fig. 3 the structure of a stretch-reducing mill 1 is outlined schematically.
- Conveying direction R of the tube 2 a number of roll stands 3 are arranged one behind the other. Rollers are arranged in each roll stand, as sketched in FIGS. 1 and 2. Due to the rolling process, the diameter of the Tube 2 somewhat reduced, with one between the individual roll stands 3 Tension for stretching the tube 2 is maintained. Because of the from roll stand to roll stand of decreasing diameter of the rolls the subsequent rollers turn faster and faster.
- a sawing device 15 is arranged, with which the rolled Pipe 2 is cut to length.
- the sawing device is called a "flying saw” trained, d. H. the saw moves in conveyance during the sawing process direction R with the ejection speed of the tube to ensure a clean Generate cut.
- a sensor 10 is arranged at a monitoring point 9 in front of the last group of roll stands 3a "", 3b “", 3c “” and 3d "". As shown in particular in FIG. 4, the sensor 10 detects when the rear end 8 of the tube 2 passes the point 9. The signal detected by the sensor 10 is sent to a controller 11.
- the control system 11 is supplied by the summation gear 12 "" (or by the motors 13 “” or 14 "") for the drive speeds of the rollers.
- the point in time t A at which the pipe 2 is ejected from the rolling mill 1, ie when the pipe end 8 leaves the last rolling stand 3d "" can therefore be calculated in a simple manner.
- a time interval .DELTA.T is also predetermined for the control or regulation, which - as can be seen from FIG. 5 - is defined in such a way that the calculated time t A comes to lie at the end of the time interval .DELTA.T.
- the control or regulation now (via the motors 13 “" and 14 “") selectively controls or regulates the rotational speed n, in particular the rollers of the last roll stand 3d "" during the time interval .DELTA.T, so that the outlet speed of the pipe increases does not leave the specified tolerance band ⁇ V.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Disintegrating Or Milling (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
- Fig. 1
- schematisch die Ansicht zweier Walzenpaare in Förderrichtung des Rohres betrachtet,
- Fig. 2
- die zu Fig. 1 zugehörige Seitenansicht,
- Fig. 3
- schematisch den Aufbau eines Streckreduzierwalzwerks,
- Fig. 4
- einen Ausschnitt aus Fig. 3 mit den letzten in Förderrichtung angeordneten Walzgerüsten und
- Fig. 5
- den Verlauf der Drehzahl der Walzen im auslaufseitigen Walzgerüst über der Zeit.
- 1
- Streckreduzierwalzwerk
- 2
- Rohr
- 3
- Walzgerüste
- 3a, 3b, 3c, 3d
- erste Gruppe Walzgerüste
- 3a', 3b', 3c', 3d'
- zweite Gruppe Walzgerüste
- 3a", 3b", 3c", 3d"
- dritte Gruppe Walzgerüste
- 3a''', 3b"', 3c''', 3d'''
- vierte Gruppe Walzgerüste
- 3a"", 3b'''', 3c"", 3d""
- fünfte Gruppe Walzgerüste
- 4, 4' 5, 5' 6, 6'
- Walzen
- 7, 7', 7", 7"', 7""
- Antriebe (Überlagerungsantriebe)
- 8
- hinteres Ende des Rohres
- 9
- Ort des Sensors (Beobachtungsstelle)
- 10
- Sensor
- 11
- Steuerung/Regelung
- 12, 12', 12", 12''', 12""
- Summierungsgetriebe
- 13, 13', 13", 13"', 13""
- Motoren
- 14, 14', 14'', 14"', 14""
- Motoren
- 15
- Sägevorrichtung
- L
- Rohrlänge
- R
- Förderrichtung
- t
- Zeit
- tA
- Zeitpunkt des Rohrausstoßes
- ΔT
- Zeitintervall
- v
- Auslaufgeschwindigkeit des Rohres
- ΔV
- Toleranz für die Auslaufgeschwindigkeit des Rohres
Claims (11)
- Verfahren zum Betreiben eines Streckreduzierwalzwerks (1) zum Walzen eines Rohres (2) mit endlicher Länge (L),
das mindestens zwei Walzgerüste (3a, 3b, 3c, 3d, 3a', 3b', 3c', 3d', ...) aufweist, die in Förderrichtung (R) des Rohres (2) hintereinander angeordnet sind,
wobei in jedem Walzgerüst (3a, 3b, 3c, 3d, 3a', 3b', 3c', 3d', ...) mindestens zwei zusammenwirkende Walzen (4, 5, 6, 4', 5', 6') angeordnet sind, die jeweils über einen definierten Umfangsabschnitt des Rohres (2) an diesem anliegen und es walzen, und
wobei mindestens zwei Antriebe (7, 7', 7", 7"', 7"") für den Antrieb der Walzen (4, 5, 6, 4', 5', 6') zweier unterschiedlicher Walzgerüste (3a, 3b, 3c, 3d, 3a', 3b', 3c', 3d', ...) vorhanden sind,
dadurch gekennzeichnet, dass das Verfahren die Schritte aufweist:a) Ermitteln des Zeitpunktes (tA), zu dem das in Förderrichtung (R) hintere Ende (8) des Rohres (2) das in Förderrichtung (R) letzte, auslaufseitige Walzgerüst (3d"") verlässt;b) Festlegung eines Zeitintervalls (ΔT) vorgegebener Dauer, in dem der Zeitpunkt (tA) liegt, zu dem das in Förderrichtung (R) hintere Ende (8) des Rohres (2) das auslaufseitige Walzgerüst (3d"") verlässt;c) Steuern oder Regeln des Antriebs (7"") des auslaufseitigen Walzgerüsts (3d"") so, dass während der Dauer des Zeitintervalls (ΔT) ein Antrieb der Walzen des auslaufseitigen Walzgerüsts (3d"") mit reduzierter Drehzahl und der Auslauf des Rohres dementsprechend mit im wesentlichen konstanter Geschwindigkeit erfolgt. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass der Zeitpunkt (tA), zu dem das in Förderrichtung (R) hintere Ende (8) des Rohres (2) das in Förderrichtung (R) auslaufseitige Walzgerüst (3d"") verlässt, ermittelt wird aus Überwachung des Zeitpunkts des Passierens des hinteren Endes (8) des Rohres (2) an einer dem auslaufseitigen Walzgerüst (3d"") in Förderrichtung (R) vorgelagerten Stelle (9) unter Berücksichtigung der Walzgeschwindigkeit des Rohres (2) von der Überwachungsstelle (9) bis zum auslaufseitigen Walzgerüst (3d""). - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass neben der Steuerung oder Regelung des Antriebs (7"") des auslaufseitigen Walzgerüsts (3d"") auch eine Steuerung oder Regelung derjenigen Antriebe (7"') erfolgt, die vorgelagerten Walzgerüsten (3a"', 3b"', 3c"', 3d"') zugeordnet sind und deren Walzen während des Zeitintervalls ΔT) Kontakt mit dem Rohr (2) haben. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass für die Steuerung oder Regelung der Drehzahl des Antriebs (7"") des auslaufseitigen Walzgerüsts (3d"") eine Toleranz (ΔV) vorgegeben wird, die nicht verlassen werden darf. - Streckreduzierwalzwerk (1) zum Walzen eines Rohres (2) mit endlicher Länge (L) zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4,
das mindestens zwei Walzgerüste (3a, 3b, 3c, 3d, 3a', 3b', 3c', 3d', ...) aufweist, die in Förderrichtung (R) des Rohres (2) hintereinander angeordnet sind,
wobei in jedem Walzgerüst (3a, 3b, 3c, 3d, 3a', 3b', 3c', 3d', ...) mindestens zwei zusammenwirkende Walzen (4, 5, 6, 4', 5', 6') angeordnet sind, die jeweils über einen definierten Umfangsabschnitt des Rohres (2) an diesem anliegen und es walzen, und
wobei mindestens zwei Antriebe (7, 7', 7", 7"', 7"") für den Antrieb der Walzen (4, 5, 6, 4', 5', 6') zweier unterschiedlicher Walzgerüste (3a, 3b, 3c, 3d, 3a', 3b', 3c', 3d', ...) vorhanden sind,
dadurch gekennzeichnet, dass Mittel (10, 11) zur Ermittlung des Zeitpunkts (tA), zu dem das in Förderrichtung (R) hintere Ende (8) des Rohres (2) das auslaufseitige Walzgerüst (3d"") verlässt, vorhanden sind sowie Mittel (11) zum Steuern oder Regeln des Antriebs (7"") des auslaufseitigen Walzgerüsts (3d"") so, dass während der Dauer eines vorgegebenen Zeitintervalls (ΔT) ein Antrieb der Walzen des auslaufseitigen Walzgerüsts (3d"") mit reduzierter Drehzahl erfolgt. - Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet, dass vor dem auslaufseitigen Walzgerüst (3d"") ein Sensor (10) angeordnet ist, der zur Erfassung des Zeitpunkts des Passierens des Endes (8) des Rohres (2) geeignet ist. - Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet, dass der Sensor (10) sein gemessenes Signal an eine Steuerung oder Regelung (11) übermittelt, die auf den Antrieb (7"") des auslaufseitigen Walzgerüsts (3d"") einwirkt. - Vorrichtung nach einem der Ansprüche 5 bis 7,
dadurch gekennzeichnet, dass zumindest der Antrieb (7"") der in Förderrichtung (R) zuletzt angeordneten Walzgerüste (3a"", 3b"", 3c"", 3d"") des Streckreduzierwalzwerks (1) ein Gesamtüberlagerungsantrieb ist, der ein Summierungsgetriebe (12"") sowie zwei Motoren (13"", 14"") aufweist. - Vorrichtung nach Anspruch 8,
dadurch gekennzeichnet, dass von dem Antrieb (7"") mindestens drei Walzgerüste (3a"", 3b"", 3c"", 3d"") angetrieben sind. - Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass hinter dem auslaufseitigen Walzgerüst (3d"") eine Sägevorrichtung (15) angeordnet ist.
- Vorrichtung nach einem der Ansprüche 5 bis 10,
dadurch gekennzeichnet, dass hinter dem auslaufseitigen Walzgerüst (3d"") ein automatischer Manipulator angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10157742A DE10157742C1 (de) | 2001-11-24 | 2001-11-24 | Verfahren zum Betreiben eines Streckreduzierwalzwerks und Streckreduzierwalzwerk |
DE10157742 | 2001-11-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1314491A1 EP1314491A1 (de) | 2003-05-28 |
EP1314491B1 true EP1314491B1 (de) | 2004-12-08 |
Family
ID=7706885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02022590A Expired - Lifetime EP1314491B1 (de) | 2001-11-24 | 2002-10-09 | Verfahren zum Betreiben eines Streckreduzierwalzwerks und Streckreduzierwalzwerk |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1314491B1 (de) |
CN (1) | CN1236873C (de) |
AT (1) | ATE284279T1 (de) |
DE (2) | DE10157742C1 (de) |
ES (1) | ES2234970T3 (de) |
RU (1) | RU2300433C2 (de) |
UA (1) | UA72613C2 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103406371B (zh) * | 2013-07-04 | 2015-11-25 | 中国重型机械研究院股份公司 | 一种冷轧管机管缝检测控制系统及方法 |
CN103447300B (zh) * | 2013-08-30 | 2015-08-05 | 湖北新冶钢特种钢管有限公司 | 集中传动减径机和减径机对热轧无缝钢管的减径工艺 |
CN103801558B (zh) * | 2014-01-27 | 2015-12-30 | 胜利油田康贝石油工程装备有限公司 | 石油用割缝管的梯型缝加工方法和设备 |
DE102017220750A1 (de) * | 2017-11-21 | 2019-05-23 | Sms Group Gmbh | Vorrichtung zur Steuerung eines Streckreduzierwalzwerks |
DE102018207908A1 (de) * | 2018-05-18 | 2019-11-21 | Sms Group Gmbh | Streckreduzierungswalzwerk mit verbesserter Durchmesser- und Wanddickentoleranz |
CN109047335A (zh) * | 2018-06-11 | 2018-12-21 | 黑龙江建龙化工有限公司 | 钢管尺寸外径控制方法 |
DE102018217378B3 (de) * | 2018-10-11 | 2020-03-26 | Sms Group Gmbh | Wanddickenkontrolle beim Streckreduzieren von Rohren |
CN109877160B (zh) * | 2019-04-09 | 2020-03-31 | 浙江鼎尚不锈钢有限公司 | 高精度无缝钢管的四辊减径机 |
CN112872044B (zh) * | 2021-01-13 | 2023-02-17 | 首钢京唐钢铁联合有限责任公司 | 一种控制轧制节奏的方法及装置 |
CN114515762B (zh) * | 2022-01-28 | 2024-01-26 | 广西钢铁集团有限公司 | 高速线材圆钢尾部尺寸控制方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU997864A1 (ru) * | 1979-04-05 | 1983-02-23 | Предприятие П/Я В-8173 | Способ настройки редукционно-раст жного стана |
DE3601693A1 (de) * | 1986-01-17 | 1987-07-23 | Mannesmann Ag | Walzstrasse zum streckreduzieren von rohren |
SU1488044A1 (ru) * | 1987-01-04 | 1989-06-23 | Всесоюзный научно-исследовательский и конструкторско-технологический институт трубной промышленности | Способ редуцировани труб с нат жением |
RU2015755C1 (ru) * | 1991-05-23 | 1994-07-15 | Всероссийский научно-исследовательский, проектно-конструкторский и технологический институт кабельной промышленности | Способ холодного редуцирования сварных трубных изделий |
DE4446659C1 (de) * | 1994-12-16 | 1996-07-25 | Mannesmann Ag | Arbeitsverfahren zur Herstellung von Rohren in einem Streckreduzierwalzwerk |
-
2001
- 2001-11-24 DE DE10157742A patent/DE10157742C1/de not_active Expired - Fee Related
-
2002
- 2002-10-09 ES ES02022590T patent/ES2234970T3/es not_active Expired - Lifetime
- 2002-10-09 EP EP02022590A patent/EP1314491B1/de not_active Expired - Lifetime
- 2002-10-09 AT AT02022590T patent/ATE284279T1/de active
- 2002-10-09 DE DE2002501715 patent/DE50201715D1/de not_active Expired - Lifetime
- 2002-11-22 RU RU2002131461/02A patent/RU2300433C2/ru not_active IP Right Cessation
- 2002-11-22 UA UA2002119336A patent/UA72613C2/uk unknown
- 2002-11-25 CN CNB02152811XA patent/CN1236873C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
UA72613C2 (uk) | 2005-03-15 |
EP1314491A1 (de) | 2003-05-28 |
ES2234970T3 (es) | 2005-07-01 |
CN1422709A (zh) | 2003-06-11 |
DE50201715D1 (de) | 2005-01-13 |
DE10157742C1 (de) | 2003-06-18 |
RU2300433C2 (ru) | 2007-06-10 |
CN1236873C (zh) | 2006-01-18 |
ATE284279T1 (de) | 2004-12-15 |
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