EP1269131B1 - Vermeidung von selbsterregten ratterschwingungen in walzanlagen - Google Patents
Vermeidung von selbsterregten ratterschwingungen in walzanlagen Download PDFInfo
- Publication number
- EP1269131B1 EP1269131B1 EP00941881A EP00941881A EP1269131B1 EP 1269131 B1 EP1269131 B1 EP 1269131B1 EP 00941881 A EP00941881 A EP 00941881A EP 00941881 A EP00941881 A EP 00941881A EP 1269131 B1 EP1269131 B1 EP 1269131B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- resistance
- oscillation
- resistance generator
- roll
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
- B21B2203/04—Brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
- B21B2203/44—Vibration dampers
Definitions
- the object of the invention is the z. B. chatter marks occurring during the cold rolling of sheet steel to exclude.
- chatter marks occurring during the cold rolling of sheet steel to exclude.
- the Basic vibrations add periodic vibrations and grow exponentially.
- the rolling stock suffers from a reduction in quality. This leads to waste and also damage the rolling mill.
- Even with weak chatter instability there are so-called thickness and / or Form waves.
- the same chattering phenomena also occur with the other rolled products on, even when rolling paper, as well as when rolling ribbons and wires.
- the vertical forces and deflections occurring on the work roll are F 1 and x 1 , in the horizontal direction F2 and x2 and the moments and angles of rotation are T 5 and ⁇ 5 .
- the forces and deflections (deflection speed) on the incoming goods are F4 and x 4 (x ⁇ 4 ) and on the outgoing goods F 3 and x 3 (x ⁇ - 3 ) .
- the moments and angles of rotation T 6 , ⁇ 6 and T 7 , ⁇ 7 also occur on the rolling stock in the immediate vicinity of the rolling location.
- the rolling system 10 can be reduced in terms of vibration to the individual modes n , consisting of the modal mass M n , the modal damping D n and the modal spring C n .
- each mode n forms a closed, single-path oscillator.
- the same equivalent circuit diagram also applies to rotary modes with the rotation angles wink.
- a resistance roll 34 is coupled to the support roll 32 and rotates due to the pressure With. Their axis of rotation is parallel to the other axes and lies in the central plane.
- the resistance roller 34 consists of a plastic with high internal damping, for example of polyurethane, and has a spectral resistance in the x 1 direction, at the critical chatter frequency this is R.
- symmetry of the rollers above and below the rolling stock 33 is assumed; hence the factor 2.
- the damping D 1 summarizes the natural internal friction losses, which can be determined from a reverberation measurement on the stationary roll stand 30.
- FIGS. 4 to 9 show different embodiments for damping with a resistance R.
- a roll stand 40 again consists of work and support rolls 41 and 42 and the rolling stock 43. The resistance is applied here, comparable to FIG. 3, by two resistance rolls 44 acting on the work roll 41.
- the resistance roller 44 is also designed for torsional vibrations and has the rotational resistance R 5 .
- the mass moment of inertia ⁇ 5 is made up of the sum of work and support rolls 41 and 42.
- C 5 dT 5 / d ⁇ 5 acts as a torsion spring for the specified operating condition, characterized by the index () 0 by the rolling speed ⁇ 0 , rolling force F (h 0 ) , tapering h 0 and working torque T 50 .
- the resistance roller 54 acting on a roller 51 does not consist of a homogeneous one Plastic, but from an annular layering of steel and plastic.
- this stratification can be described as a quasi-homogeneous waveguide describe and mark again with a resistance R. Thanks to the higher mass, greater structural freedom, resonance enables higher resistance densities to be achieved, so that a continuous cylinder roller is not necessary and individual roller disks are sufficient.
- the contact line must have a high Hertzian spring constant. This is achieved if the outer jacket of the resistance roller 54 is also made of steel.
- the resistance roller 54 is designed as a resonator, it can be expedient be to dimension the spring constants of the Hertzian contact line so that the Hertzian Spring constant and the roller mass a resonator with the required resonance frequency result.
- the advantage of this solution is that the Hertzian spring constant due to the contact pressure and so that the resonance frequency can be adjusted.
- the resistance sensor 64 is mounted inside the support roller 62.
- a resistance sensor 74 consisting of concentric steel / plastic layers.
- FIGS. 8 and 9 show fixed resistors 84 and 94 which act on the rollers 81 and 91.
- the resistance body 84 is coupled by a slide bearing shell 86 and is able to suppress vibrations perpendicular to the bearing.
- the resistance R is actively generated.
- a sensor 95 records the oscillation speed x ⁇ of the roller 91 and a force F proportional x ⁇ is transmitted electrodynamically to the roller 91 in the resistance transducer 94.
- Fanned mode vibrations can also occur in the rolling stock itself.
- a resistance roller 104 with a resistance R acts on the rolling stock 103 in FIG. 10.
- the principle of action is identical to the resistance rollers described in FIG. 3.
- the resistance R must in particular be adapted to the impedance of the rolling stock.
- an impedance jump acts as a reflector, but if resistance is the same, a maximum of vibration energy is withdrawn from the vibration system.
- an active resistance transmitter 114 is used, controlled by the signal x ⁇ of the fast sensor 115, to generate a resistance R.
- the embodiment according to FIG. 12 is suitable for damping transverse bending vibrations in the rolling stock 123.
- a perforated plate 124 is brought near the rolling stock 123, so that the air friction in the perforations acts as a damper with a resistance R that can be set in terms of construction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Braking Arrangements (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Description
- Fig. 1
- Walzprozess, Bezeichnungen.
- Fig. 2
- Modales Ersatzsystem
- Fig. 3 bis 5
- Resistanzwalzen zur Schwingungsstabilisierung.
- Fig. 6 und 7
- Mitrotierende Resistanzkörper zur Schwingungsstabilisierung
- Fig. 8 und 9
- Feststehende Resistanzgeber.
- Fig. 10 bis 12
- Auf das Walzgut einwirkende Resistanzkörper.
- X0 =
- Walzanlage, Walzgerüst;
- X1,X2 =
- Walzen;
- X3 =
- Walzgut;
- X4 =
- Resistanzwalze, -körper, -geber
- X5 =
- Sensor zur Steuerung eines aktiven Resistanzgebers
- X6 =
- Kopplungsglied.
Die Ausführungsbeispiele der Fig. 8 und 9 zeigen feststehende Resistanzkörper 84 und 94, die auf die Walzen 81 und 91 wirken. In Fig. 8 ist der Resistanzkörper 84 durch eine Gleitlagerschale 86 angekoppelt und vermag Schwingungen senkrecht zum Lager zu unterdrücken. Im Beispiel der Fig. 9 wird die Resistanz R aktiv generiert. Dazu nimmt ein Sensor 95 die Schwinggeschwindigkeit x ˙ der Walze 91 auf und in dem Resistanzgeber 94 wird - hier - elektrodynamisch eine Kraft F proportional x ˙ auf die Walze 91 übertragen. Dies erfolgt nach dem Prinzip des Linearmotors oder durch eine Wirbelstrombremsung. Für die Steuerung gibt es aus der Antischall-Technik (engl. AVC = active vibration control) bekannte Lösungen. Der Proportionaltätsfaktor von F und x ˙ stellt gerade die Resistanz dar; bekanntlich ist R = F/x ˙.
Claims (5)
- Vorrichtung zur Stabilisierung von Walzanlagen gegenüber selbsterregten Ratterschwingungen und gegen störende Dicken- und/oder Formwellen im Walzgut durch einen Schwingungsdämpfer gekennzeichnet durch folgende Merkmale:a) als Schwingungsdämpfer wird ein walzenförmiger oder walzenscheibenförmiger Resistanzgeber (34,44,54,64,74) verwendetb) der Resistanzgeber ist aus mehreren ringförmigen, sich radial abwechselnden Metall- und Kunststoffschichten aufgebautc) der Resistanzgeber wirkt durch seinen Schichtaufbau als radialer quasihomogener Wellenleiterd) der Resistanzgeber ist kraft- und/oder momentenschlüssig an eine Walze (X1, X2) oder an ein Walzgut (X3) angekoppelte) der Resistanzgeber ist mitrotierend ausgeführtf) am Umfang des Resistanzgeber von der Walze (X1, X2) oder dem Walzgut (X3) eingeleiteten translatorischen und/oder rotatorischen Körperschallschwingungen werden durch den Wellenleiter in einem oder mehreren Schwinungsfreiheitsgraden gedämpft.g) die Punkt- und/oder Momentresistanz des Resistanzgebers im Bereich der kritischen Ratterfrequenz wirkt schwingungsdynamisch direkt auf den Walzpunkt mit der plastisehen Verformung des Walzgutes ein und hebt die durch degressive Walzkräfte und/oder - momente verursachte Ratterinstabilität auf.
- Vorrichtung zur Stabilisierung von Walzanlagen durch einen Schwingungsdämpfer nach Anspruch 1 dadurch gekennzeichnet, daß die Kunststoffschichten des Resistanzgebers eine hohe innere Dämpfung besitzen.
- Vorrichtung zur Stabilisierung von Walzanlagen durch einen Schwingungsdämpfer nach einem der Ansprüche 1-2, dadurch gekennzeichnet, daß der Außenmantel des Resistanzgebers (54) aus Metall besteht.
- Vorrichtung zur Stabilisierung von Walzanlagen durch einen Schwingungsdämpfer nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß die Federkonstante der Hertzschen Kontaktlinie und die Masse der Resistanzwalze (54) einen Resonator mit einstellbarer Frequenz ergeben.
- Vorrichtung zur Stabilisierung von Walzanlagen durch einen Schwingungsdämpfer nach einem der Ansprüche 1-4, dadurch gekennzeichnet, daß der Resistanzgeber (64,74) im Innern der Walze (62) oder am Rand der Walze (71) angebracht ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19918555A DE19918555C1 (de) | 1999-04-23 | 1999-04-23 | Stabilisierung von Walzanlagen gegenüber selbsterregten Ratterschwingungen |
DE19918555 | 1999-04-23 | ||
PCT/DE2000/001240 WO2000065319A2 (de) | 1999-04-23 | 2000-04-20 | Vermeidung von selbsterregten ratterschwingungen in walzanlagen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1269131A2 EP1269131A2 (de) | 2003-01-02 |
EP1269131B1 true EP1269131B1 (de) | 2004-01-07 |
Family
ID=7905682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00941881A Expired - Lifetime EP1269131B1 (de) | 1999-04-23 | 2000-04-20 | Vermeidung von selbsterregten ratterschwingungen in walzanlagen |
Country Status (9)
Country | Link |
---|---|
US (1) | US6773383B2 (de) |
EP (1) | EP1269131B1 (de) |
JP (1) | JP2002542944A (de) |
AT (1) | ATE257586T1 (de) |
AU (1) | AU779828B2 (de) |
BR (1) | BR0009988A (de) |
CA (1) | CA2371111A1 (de) |
DE (2) | DE19918555C1 (de) |
WO (1) | WO2000065319A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107597850A (zh) * | 2017-08-31 | 2018-01-19 | 武汉钢铁有限公司 | 确定冷轧机振源的方法、装置、计算机存储介质及设备 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2002222242A1 (en) * | 2000-12-20 | 2002-07-01 | Alcan International Limited | Mill vibration control apparatus and method |
DE10328557B4 (de) * | 2003-06-24 | 2005-04-14 | Walzen Irle Gmbh | Walze |
US8042807B2 (en) * | 2006-12-21 | 2011-10-25 | Palo Alto Research Center Incorporated | Transport for printing systems |
DE102007000131A1 (de) * | 2007-03-07 | 2008-09-11 | Hilti Ag | Handwerkzeugmaschine mit pneumatischem Schlagwerk |
IT1390945B1 (it) * | 2008-08-06 | 2011-10-27 | Futura Spa | Rullo per il trattamento di materiale nastriforme cartaceo |
AT507087B1 (de) * | 2008-12-05 | 2010-02-15 | Siemens Vai Metals Tech Gmbh | Verfahren und vorrichtung zur semi-aktiven reduktion von druckschwingungen in einem hydrauliksystem |
IT1402012B1 (it) | 2010-10-08 | 2013-08-28 | Danieli Off Mecc | Sistema di smorzamento di vibrazioni di un laminatoio |
US8584552B2 (en) * | 2011-02-23 | 2013-11-19 | Mario H. Gottfried | High speed conical flywheel system |
CN104942010B (zh) * | 2015-07-03 | 2017-04-05 | 燕山大学 | 一种板带轧机颤振的建模方法 |
CN112050916B (zh) * | 2020-06-22 | 2021-11-30 | 华东理工大学 | 一种基于称重托辊的振动频率测量物料总质量的方法 |
CN112453053B (zh) * | 2020-09-28 | 2023-07-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 薄规格及极薄规格带钢生产中光整机处带钢起筋消除方法 |
CN114483870B (zh) * | 2022-01-26 | 2023-10-20 | 太原理工大学 | 一种轧机辊系垂直振动的刚柔耦合吸振装置 |
Family Cites Families (21)
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US1790697A (en) * | 1931-02-03 | Antibacklash mechanism for rolling-mill trains | ||
US620286A (en) * | 1899-02-28 | Rubber roll | ||
US3111894A (en) * | 1962-04-17 | 1963-11-26 | West Virginia Pulp & Paper Co | Calender vibration eliminator |
FR1354656A (fr) * | 1962-05-30 | 1964-03-06 | Karlstad Mekaniska Ab | Calandre à papier |
GB1026207A (en) * | 1962-10-23 | 1966-04-14 | Shin Mitsubishi Jukogyo Kk | A roller assembly for a calender |
US3279234A (en) | 1962-12-13 | 1966-10-18 | Superior Electric Co | Plate rolling machine |
US3503242A (en) * | 1967-04-20 | 1970-03-31 | Natalis H Polakowski | Mill rolling machine |
DE2412672C3 (de) * | 1974-03-16 | 1980-08-28 | Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen | Breitbandiger Schwingungsdämpfer zum Reduzieren von Körperschall |
DE2449874A1 (de) * | 1974-10-21 | 1976-04-29 | Hufnagl Walter | Rolle zum kaltverformen von walzdraht |
DE3113268C2 (de) * | 1981-04-02 | 1983-12-22 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Schwingungsabsorber |
DD204631A1 (de) * | 1982-03-25 | 1983-12-07 | Alban Zoellner | Lagerung |
JPS6118658A (ja) * | 1984-07-02 | 1986-01-27 | Mitsubishi Heavy Ind Ltd | ストリツプの振動吸収装置 |
US4842944A (en) | 1984-11-07 | 1989-06-27 | Canon Kabushiki Kaisha | Elastic rotatable member |
US5081760A (en) | 1989-06-26 | 1992-01-21 | Hitachi, Ltd. | Work roll for metal rolling |
US5252130A (en) | 1989-09-20 | 1993-10-12 | Hitachi, Ltd. | Apparatus which comes in contact with molten metal and composite member and sliding structure for use in the same |
DE4103248A1 (de) * | 1991-02-04 | 1992-08-06 | Kugelfischer G Schaefer & Co | Lagerung der arbeitswalze eines dressiergeruestes |
ATE143429T1 (de) | 1991-05-03 | 1996-10-15 | Voith Sulzer Papiermasch Gmbh | Durchbiegungseinstellwalze und deren verwendung |
JP3194260B2 (ja) * | 1993-09-28 | 2001-07-30 | 川崎製鉄株式会社 | 調質圧延機におけるチャターマーク防止装置 |
JP3575054B2 (ja) * | 1994-04-22 | 2004-10-06 | 東海ゴム工業株式会社 | 導電性ロールの製造方法 |
JP3307551B2 (ja) | 1996-07-02 | 2002-07-24 | 株式会社日立製作所 | 圧延機用駆動装置、圧延機及び圧延方法 |
DE19702325A1 (de) * | 1997-01-23 | 1998-07-30 | Alcan Gmbh | Verfahren zur Herstellung von schwingungsgedämpften Walzen und Walzensatz |
-
1999
- 1999-04-23 DE DE19918555A patent/DE19918555C1/de not_active Expired - Fee Related
-
2000
- 2000-04-20 AU AU56711/00A patent/AU779828B2/en not_active Ceased
- 2000-04-20 AT AT00941881T patent/ATE257586T1/de not_active IP Right Cessation
- 2000-04-20 JP JP2000614011A patent/JP2002542944A/ja active Pending
- 2000-04-20 EP EP00941881A patent/EP1269131B1/de not_active Expired - Lifetime
- 2000-04-20 CA CA002371111A patent/CA2371111A1/en not_active Abandoned
- 2000-04-20 DE DE50004997T patent/DE50004997D1/de not_active Expired - Fee Related
- 2000-04-20 WO PCT/DE2000/001240 patent/WO2000065319A2/de active IP Right Grant
- 2000-04-20 BR BR0009988-0A patent/BR0009988A/pt not_active IP Right Cessation
-
2001
- 2001-10-22 US US09/982,806 patent/US6773383B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107597850A (zh) * | 2017-08-31 | 2018-01-19 | 武汉钢铁有限公司 | 确定冷轧机振源的方法、装置、计算机存储介质及设备 |
Also Published As
Publication number | Publication date |
---|---|
BR0009988A (pt) | 2002-01-08 |
CA2371111A1 (en) | 2000-11-02 |
US6773383B2 (en) | 2004-08-10 |
DE19918555C1 (de) | 2001-06-07 |
ATE257586T1 (de) | 2004-01-15 |
WO2000065319A3 (de) | 2001-04-05 |
AU779828B2 (en) | 2005-02-10 |
US20020072457A1 (en) | 2002-06-13 |
DE50004997D1 (de) | 2004-02-12 |
AU5671100A (en) | 2000-11-10 |
JP2002542944A (ja) | 2002-12-17 |
WO2000065319A2 (de) | 2000-11-02 |
EP1269131A2 (de) | 2003-01-02 |
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