DE3618756C1 - Method for rolling hot strip - Google Patents

Method for rolling hot strip

Info

Publication number
DE3618756C1
DE3618756C1 DE19863618756 DE3618756A DE3618756C1 DE 3618756 C1 DE3618756 C1 DE 3618756C1 DE 19863618756 DE19863618756 DE 19863618756 DE 3618756 A DE3618756 A DE 3618756A DE 3618756 C1 DE3618756 C1 DE 3618756C1
Authority
DE
Germany
Prior art keywords
center line
rolling
slab
cross
sectional profile
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
Application number
DE19863618756
Other languages
German (de)
Inventor
Wolfgang Dipl-Ing Fabian
Hermann-Josef Prof Dr Kopineck
Wilhelm Dr Tappe
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.)
Krupp Hoesch Stahl AG
Original Assignee
Hoesch Stahl AG
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
Priority claimed from DE19843444931 external-priority patent/DE3444931C2/en
Application filed by Hoesch Stahl AG filed Critical Hoesch Stahl AG
Priority to DE19863618756 priority Critical patent/DE3618756C1/en
Application granted granted Critical
Publication of DE3618756C1 publication Critical patent/DE3618756C1/en
Expired legal-status Critical Current

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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/466—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 metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B21B1/26—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 in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill

Landscapes

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

Abstract

The invention consists in an extension of the possible applications of the method and apparatus according to Patent Application P 3444931.0-32 to wider slabs or feedstock, such as those obtained from continuous casting plants, in which the ratio of width to height is up to 20.

Description

Die Erfindung betrifft ein Verfahren zur Korrek­ tur von fehlerhaften Brammen oder Vormaterial gemäß dem Oberbegriff des Anspruches 1.The invention relates to a method for correction faulty slabs or primary material according to the preamble of claim 1.

Ein solches Verfahren wurde durch das Deutsche Hauptpatent 34 44 931 bereits vorgeschlagen, wobei die fehlerhaften Brammen oder Vormaterial nach der Korrektur in einer Warmwalzstraße zu relativ dünnem Blech ausgewalzt werden.Such a procedure was created by the main German patent 34 44 931 already proposed, the faulty slabs or primary material after the Correction in a hot rolling mill to a relatively thin sheet be rolled out.

Der Erfindung liegt die Aufgabe zugrunde, das Anwendungsge­ biet des in der DE 34 44 931 C 2 beschriebenen Verfahrens zu er­ weitern.The invention is based, the application Ge offers the method described in DE 34 44 931 C 2 continue.

Diese Aufgabe wird durch die kennzeichnenden Merkmale im Anspruch 1 gelöst.This task is characterized by the characteristic features in the Claim 1 solved.

Es hat sich herausgestellt, daß das in der DE 34 44 931 C 2 be­ schriebene Verfahren und die Vorrichtung zur Durchführung des Verfahrens bei den üblicherweise auftretenden relativ klei­ nen Fehlern bei Stranggußanlagen auch mit Brammen oder Vor­ material durchführbar ist, bei denen die Breite bis zum Zwanzigfachen der Höhe beträgt.It has been found that that in DE 34 44 931 C 2 be written method and the device for performing the Procedure in the usually occurring relatively small Errors in continuous casting plants also with slabs or pre material is feasible in which the width up to Twenty times the amount.

Bei Brammen, bei denen das Verhältnis von Breite zur Höhe be­ sonders groß ist, können nicht so große Fehler korrigiert werden, wie bei Brammen, wo dieses Verhältnis klein ist. Es können bei Brammen, bei denen das Verhältnis von der Breite zur Höhe z. B. 10 beträgt in einem korrigierenden Walzen­ durchgang bis 4% des Gesamtvolumens der Bramme bei der Korrektur weggewalzt werden, ohne daß die Bramme sich säbel­ förmig verzieht. For slabs in which the ratio of width to height be is particularly large, can not correct such large errors like slabs, where this ratio is small. It can with slabs, where the ratio of the width to the height z. B. 10 is in a corrective rolling passage up to 4% of the total volume of the slab at the Correction are rolled away without the slab saber warped.  

Die Bramme verkrümmt sich erst merklich, wenn bei dem gleichen Verhältnis von Höhe zur Breite der Bramme noch mehr als 4% des Volumens weggewalzt werden.The slab only warps noticeably if it is at the same Ratio of height to width of the slab still more than 4% of the volume are rolled away.

Ein Wegwalzen von 4% des gesamten Volumens setzt schon einen extrem großen Fehler voraus, der bei Stranggußanlagen nicht auftritt. Bei den üblichen vorkommenden Fehlern bei Strang­ gußanlagen brauchen höchstens 2% des Volumens zur Korrektur weggewalzt werden.Rolling away 4% of the total volume already sets you in extremely large error ahead, which is not the case with continuous casting plants occurs. With the usual occurring errors in strand Casting plants need a maximum of 2% of the volume for correction be rolled away.

Wenn eine Bramme z. B. an einer Seite um 10% dicker ist als an der anderen Seite und die Dickenzunahme linear ist, so ist zur Korrektur ein im Querschnitt dreieckförmiger Teil wegzu­ walzen, der genau 2,5% des gesamten Volumens der Bramme aus­ macht.If a slab e.g. B. is 10% thicker on one side than on the other hand and the increase in thickness is linear, so is to correct a triangular section in cross section roll out exactly 2.5% of the total volume of the slab makes.

Eine vorteilhafte Ausgestaltung der Erfindung ist in Anspruch 2 gekennzeichnet.An advantageous embodiment of the invention is in claim 2 featured.

Claims (2)

1. Verfahren zum Walzen von Warmband aus Brammen oder Vorma­ terial, bei denen das Querschnittprofil in fehlerhafter Weise unsymmetrisch zur Mittellinie liegt, und bei denen die Unsymmetrie mit an sich bekannten Meßverfahren und Vergleichern ermittelt wird und zur Korrektur des Fehlers eine ebenfalls bekannte Korrekturvorrichtung zum Verändern des Querschnittprofils des Walzspaltes eines Walzgerüstes benutzt wird, wobei zum Ermitteln der Unsymmetrie an einer der oberen oder unteren längsseitigen Begrenzungsflächen der Bramme oder des Vormaterials die in Längsrichtung oder Walzrichtung sich erstreckende Mittellinie ermittelt wird und auf einer Linie quer zu dieser Mittellinie in symme­ trisch zur Mittellinie liegenden Meßpunkten die Abstände zu der gegenüberliegenden Fläche gemessen werden und die Meßwerte der symmetrisch zur Mittellinie auf den beiden Hälften sich entsprechende Meßpunkte miteinander ver­ glichen werden und bei einer für die Weiterverarbeitung störenden Unsymmetrie des Querschnittprofils zur Mittel­ linie die Bramme oder das Vormaterial durch eine Walzein­ richtung geführt wird, die vor der Warmwalzstraße liegt, oder die erste Walzeinrichtung der Warmwalzstraße ist und die so eingestellt ist, daß symmetrisch zur Mittellinie liegende gleiche Abstände gewalzt werden, wobei mindestens 30% der gesamten Breite auf der einen Hälfte mit den kleineren Abstandswerten liegend nicht mitgewalzt werden und weitgehend die andere Hälfte ausgewalzt wird, die von den symmetrisch gegenüber der Mittellinie liegenden Punk­ ten die größeren Werte der Abstände enthält und die Ein­ stellung der Walzeinrichtung so gewählt wird, daß die weitgehend ausgewalzte Hälfte in den Abständen und somit im Querschnittprofil zur Mittellinie angenähert symme­ trisch zum Querschnittsprofil der anderen Hälfte ist und anschließend die Bramme oder das Vormaterial den weiteren Walzeinrichtungen der Warmbandstraße zugeführt wird nach Patentanmeldung P 34 44 931, dadurch gekennzeichnet, daß die Breite der Bramme oder des Vormaterials weniger als das Zwanzigfache der Höhe beträgt.1. A method for rolling hot strip from slabs or Vorma material, in which the cross-sectional profile is incorrectly asymmetrical to the center line, and in which the asymmetry is determined with known measuring methods and comparators and to correct the error a known correction device for changing of the cross-sectional profile of the roll gap of a rolling stand is used, the center line extending in the longitudinal direction or rolling direction being determined and on a line transverse to this center line in symmetrical to the center line to determine the asymmetry on one of the upper or lower longitudinal boundary surfaces of the slab or of the primary material lying measuring points, the distances to the opposite surface are measured and the measured values of the measuring points symmetrical with respect to the center line on the two halves are compared with each other and with a disturbing asymmetry of the que for further processing cutting profile to the center line the slab or the raw material is passed through a rolling device, which is in front of the hot rolling mill, or is the first rolling device of the hot rolling mill and which is set so that the same distances are rolled symmetrically to the center line, with at least 30% of the total width on one half with the smaller distance values are not rolled along and largely the other half is rolled out, which contains the larger values of the distances from the points symmetrical with respect to the center line and the setting of the rolling device is selected so that the largely rolled out in the intervals and thus in the cross-sectional profile to the center line is approximately symmetrical to the cross-sectional profile of the other half and then the slab or the raw material is fed to the further rolling devices of the hot strip mill according to patent application P 34 44 931, characterized in that the width the slab or the raw material is less than 20 times the height. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß dieses auf in Stranggußanlagen hergestelle Brammen oder Vormaterial angewandt wird.2. The method according to claim 1, characterized in that this on slabs manufactured in continuous casting plants or Material is applied.
DE19863618756 1984-12-08 1986-06-06 Method for rolling hot strip Expired DE3618756C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863618756 DE3618756C1 (en) 1984-12-08 1986-06-06 Method for rolling hot strip

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843444931 DE3444931C2 (en) 1984-12-08 1984-12-08 Method and device for rolling hot strip
DE19863618756 DE3618756C1 (en) 1984-12-08 1986-06-06 Method for rolling hot strip

Publications (1)

Publication Number Publication Date
DE3618756C1 true DE3618756C1 (en) 1987-11-19

Family

ID=25827205

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863618756 Expired DE3618756C1 (en) 1984-12-08 1986-06-06 Method for rolling hot strip

Country Status (1)

Country Link
DE (1) DE3618756C1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3444931C2 (en) * 1984-12-08 1987-01-29 Hoesch Stahl AG, 4600 Dortmund Method and device for rolling hot strip

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3444931C2 (en) * 1984-12-08 1987-01-29 Hoesch Stahl AG, 4600 Dortmund Method and device for rolling hot strip

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Legal Events

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8100 Publication of the examined application without publication of unexamined application
AF Is addition to no.

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Owner name: KRUPP HOESCH STAHL AG, 44145 DORTMUND, DE