EP0928644B1 - Regelungsverfahren für kontinuierliches Nachwalzen von Stahlband - Google Patents

Regelungsverfahren für kontinuierliches Nachwalzen von Stahlband Download PDF

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Publication number
EP0928644B1
EP0928644B1 EP99400036A EP99400036A EP0928644B1 EP 0928644 B1 EP0928644 B1 EP 0928644B1 EP 99400036 A EP99400036 A EP 99400036A EP 99400036 A EP99400036 A EP 99400036A EP 0928644 B1 EP0928644 B1 EP 0928644B1
Authority
EP
European Patent Office
Prior art keywords
cage
regulation
elongation
strip
stand
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
Application number
EP99400036A
Other languages
English (en)
French (fr)
Other versions
EP0928644A1 (de
Inventor
Fernand Allegro
Frédéric Bertolini
Rodolphe Devos
Régis Mieze
Philippe Reynoudt
Bruno Sparty
Michel Chauvire
Gilles Revoir
Didier Becler
Christophe Silvy-Leligois
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0928644A1 publication Critical patent/EP0928644A1/de
Application granted granted Critical
Publication of EP0928644B1 publication Critical patent/EP0928644B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21B37/56—Elongation control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling

Definitions

  • the invention relates to a method for controlling an operation. continuous hardening and reduction of a metal strip in a work hardening installation, comprising at least two successive cages of rolling.
  • a rolling or work hardening cage of this type of installation has two working cylinders rotating in opposite directions in the air gap which a metal strip can be reduced and / or hardened; in terms of the clamping force of these cylinders, the thickness of the metal strip is reduced and its length, on the contrary, increased.
  • the elongation rate obtained is depending on the clamping force of the cage; in the case of a “skin-pass”, the elongation rate is low, whereas in the case of a “DR” operation, it can reach around 60%.
  • the cage speed differential depends therefore the rate of elongation of the strip.
  • the invention relates to a method for adjusting these actuators according to of these measures.
  • Mode 2 is shown schematically in the block diagram of Figure 1, where 1 ', 2 and 3 respectively designate the “S-block”, the first cage and the second cage ; 4A and 4B the elongation rate measurement device.
  • the transfer function of regulation B is complex because the law of behavior linking force and elongation is not at all linear; this law of behavior is similar to the classical law of behavior linking the tensile and elongation, as shown in Figure 4.
  • regulation B is of the “band” type dead ”.
  • the invention aims to remedy these drawbacks.
  • the clamping force of this cage is adjusted so as to maintain said measured voltage within a predetermined range of values, the possible modification of the clamping force only intervening when said belt tension leaves said range; this type of setting is conventionally called “dead band regulation”.
  • the strip work hardening installation continuous metal comprises, in the direction of travel of the band B, a unwinder 7, an input S block 1 ', a first cage 2 then a second cage 3, an outlet S-block 5 and a rewinder 6.
  • the unwinder 7 and the rewinder 6 are of a conventional type and will not be not described in detail.
  • the “S” blocks 1 ', 5, composed of two support rollers strip, are used in a conventional manner to vary the tension of strip B; one of the rollers of each block is provided with non-tachometric means shown 4A, 4B adapted to accurately measure the speed of passage of band B in these blocks 1 ', 5.
  • Each cage 2, 3 has two supported working rolls each by a support cylinder; means not shown allow to varying the clamping force of the working rolls towards each other; other means not shown allow the speed of rotation to be varied working cylinders of each cage.
  • the work hardening installation also includes means (not shown) to measure the belt tension between stands 2 and 3.
  • the measurement of the elongation rate of the upstream cage 2 conventionally follows from the tachometric measurements practiced in 4A, 4B at level of block in S input 1 'and output 5, after deduction of the rate reduced elongation of the cage 3.
  • the regulation B ′ is preferably of the “dead band” type, that is to say that the clamping force is only acted on if the tension of the strip comes out of a predetermined range of values (the maximum corresponding for example to a risk of rupture, the minimum, for example, a risk of creases).
  • the gain of regulation B ' must be adapted so that the response time of this regulation is much greater than the response time responds to regulation A '.
  • the regulation operation B ′ can even be carried out "Manually" by the installation operator.
  • the purpose of this example is to compare the performance of the regulation according to the invention compared to those of a conventional art regulation previous in the case of a steel strip rolling operation carried out after annealing (called "double reduction").
  • Figure 8 illustrates these fluctuations in the classic case where pull-ups are regulated by speed and where the band elongation (or thickness) is regulated either directly by tightening the reduction cage or indirectly by traction interlining with recentering by tightening the reduction cage; there are significant fluctuations in the elongation: ⁇ 3% around the average value of 37.5%.
  • Figure 9 illustrates, facing the same disturbance, these fluctuations in the case, according to the invention, the intercage traction is regulated by the tightening of the reduction cage and where the elongation is directly regulated by the speed of the last cage; we note that the elongation remains almost constant, the fluctuations being reduced by a factor of at least 5 compared to the case previous.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Claims (2)

  1. Verfahren zum Steuern einer kontinuierlichen Kaltverformung und zur Dickenreduktion eines Metallbandes B, bei welchem das Metallband den Spalt der Arbeitswalzen von mindestens zwei aufeinanderfolgenden Walzgerüsten durchläuft, die ein Vorgerüst (2) zur Erzielung der wesentlichen Dickenreduktion und ein Nachgerüst (3) enthalten, und bei dem zur kontinuierlichen Regelung der Drehgeschwindigkeit und der Walzkraft der Walzen des Dickenreduktionsgerüstes (2) das Längungsverhältnis des durch dieses Gerüst (2) laufenden Bandes und die Bandspannung hinter diesem Gerüst (2) gemessen werden,
    gekennzeichnet durch die folgenden Schritte:
    Steuern der Geschwindigkeit der Walzen dieses Gerüsts (2) relativ zu derjenigen der Walzen des Nachgerüsts (3) in Abhängigkeit von dem gemessenen Längungsverhältnis,
    Steuern der Walzkraft dieses Gerüsts (2) in Abhängigkeit von der danach gemessenen Spannung,
    wobei die Ansprechzeit zur Steuerung der Walzkraft viel größer als die Ansprechzeit zur Steuerung der Geschwindigkeit gewählt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Walzkraft dieses Gerüsts (2) so eingestellt wird, dass die gemessene Spannung in einem vorbestimmten Wertebereich bleibt und eine eventuelle Änderung der Walzkraft nur erfolgt, wenn die Spannung des Bandes außerhalb dieses Bereichs liegt.
EP99400036A 1998-01-13 1999-01-08 Regelungsverfahren für kontinuierliches Nachwalzen von Stahlband Expired - Lifetime EP0928644B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9800214A FR2773505B1 (fr) 1998-01-13 1998-01-13 Procede de pilotage d'une operation d'ecrouissage en continu d'une bande metallique
FR9800214 1998-01-13

Publications (2)

Publication Number Publication Date
EP0928644A1 EP0928644A1 (de) 1999-07-14
EP0928644B1 true EP0928644B1 (de) 2002-12-18

Family

ID=9521671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400036A Expired - Lifetime EP0928644B1 (de) 1998-01-13 1999-01-08 Regelungsverfahren für kontinuierliches Nachwalzen von Stahlband

Country Status (7)

Country Link
US (1) US6079242A (de)
EP (1) EP0928644B1 (de)
AT (1) ATE229849T1 (de)
BR (1) BR9900047A (de)
CA (1) CA2259110C (de)
DE (1) DE69904513T2 (de)
FR (1) FR2773505B1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729773C5 (de) * 1997-07-11 2007-05-10 Siemens Ag Verfahren und Einrichtung zum Walzen eines Metallbandes
DE19903926A1 (de) * 1999-02-01 2000-08-03 Sms Demag Ag Verfahren und Anlage zum Umformen von Metallband
KR20050010182A (ko) * 2003-07-18 2005-01-27 현대자동차주식회사 판재의 내덴트성 향상 방법
US8967219B2 (en) 2010-06-10 2015-03-03 Guardian Ig, Llc Window spacer applicator
WO2009064915A1 (en) * 2007-11-13 2009-05-22 Infinite Edge Technologies, Llc Reinforced window spacer
US9309714B2 (en) 2007-11-13 2016-04-12 Guardian Ig, Llc Rotating spacer applicator for window assembly
EP2454437B1 (de) 2009-07-14 2017-05-10 Guardian IG, LLC Gedehnte streifen für distanzstück und abgedichtete einheit
US9228389B2 (en) 2010-12-17 2016-01-05 Guardian Ig, Llc Triple pane window spacer, window assembly and methods for manufacturing same
US9689196B2 (en) 2012-10-22 2017-06-27 Guardian Ig, Llc Assembly equipment line and method for windows
US9260907B2 (en) 2012-10-22 2016-02-16 Guardian Ig, Llc Triple pane window spacer having a sunken intermediate pane
BR112017000255B1 (pt) * 2014-07-15 2022-12-06 Novelis Inc Sistema de controle de vibrações, moinho de laminação a frio que incorpora o sistema, e, método de controle de vibrações para usar o sistema
MX2017000905A (es) 2014-07-25 2017-03-08 Novelis Inc Control de las vibraciones de tercera octava de una laminadora mediante una amortiguacion del proceso.
CN105224793B (zh) * 2015-09-21 2017-11-21 中冶南方工程技术有限公司 干平整带钢屈服强度和摩擦系数的联合修正方法
CN105414201B (zh) * 2015-12-10 2017-11-03 安徽马钢自动化信息技术有限公司 一种提高光整机加减速时延伸率控制精度的方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US30933A (en) * 1860-12-18 Improvement in harvesting-machines
US3820365A (en) * 1973-03-23 1974-06-28 Westinghouse Electric Corp Automatic extension control
US4016740A (en) * 1973-12-27 1977-04-12 Nippon Steel Corporation Method and an apparatus for the manufacture of a steel sheet
US4188812A (en) * 1979-01-03 1980-02-19 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Installation for production of continuously cold rolled sheet metal or strip
JPS57193213A (en) * 1981-05-22 1982-11-27 Nippon Steel Corp Tension controller
JPS6213209A (ja) * 1985-07-09 1987-01-22 Mitsubishi Electric Corp 伸び率制御装置
JPS62275514A (ja) * 1986-05-20 1987-11-30 Sumitomo Metal Ind Ltd スキンパスミルの伸率制御方法
US5054302A (en) * 1989-04-07 1991-10-08 Kawasaki Steel Corporation Hardness compensated thickness control method for wet skin-pass rolled sheet
JPH03128111A (ja) * 1989-10-12 1991-05-31 Toshiba Corp ストリップの伸び率制御装置
JPH04305305A (ja) * 1991-03-29 1992-10-28 Kawasaki Steel Corp 調質圧延機の伸率制御方法

Also Published As

Publication number Publication date
FR2773505B1 (fr) 2000-02-25
CA2259110C (fr) 2007-05-08
EP0928644A1 (de) 1999-07-14
FR2773505A1 (fr) 1999-07-16
DE69904513D1 (de) 2003-01-30
ATE229849T1 (de) 2003-01-15
BR9900047A (pt) 2000-01-04
DE69904513T2 (de) 2003-09-11
US6079242A (en) 2000-06-27
CA2259110A1 (fr) 1999-07-13

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