EP0436762A1 - Method and apparatus for achieving a predetermined yield point and surface roughness during cold-laminating of metallic pre-treated strips - Google Patents
Method and apparatus for achieving a predetermined yield point and surface roughness during cold-laminating of metallic pre-treated strips Download PDFInfo
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- EP0436762A1 EP0436762A1 EP90100562A EP90100562A EP0436762A1 EP 0436762 A1 EP0436762 A1 EP 0436762A1 EP 90100562 A EP90100562 A EP 90100562A EP 90100562 A EP90100562 A EP 90100562A EP 0436762 A1 EP0436762 A1 EP 0436762A1
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- Prior art keywords
- roll stand
- duo
- rolling
- roller set
- roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
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- 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
- B21B1/28—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 cold-rolling, e.g. Steckel cold mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/14—Roughness
Definitions
- the invention relates to a method for producing a predetermined yield strength and surface roughness in the course of the cold rolling of pretreated metal strips.
- strip treatment plants are known in which a cold post-rolling stand in duo, quarto or multi-roll construction is arranged after one or more treatment parts.
- the treatment parts used are devices for chemical treatment, for cleaning and degreasing, for annealing and heat treatment, for coating with metallic coatings such as tin, zinc, aluminum or the like, for applying paints, lacquers or photochemical layers of metal strips.
- Such a cold rolling mill is often also referred to as a skin pass mill.
- the cold rolling mill has the task of setting the strip material to a predetermined yield strength by targeted cold forming and at the same time transferring a defined roughness from the rolls to the strip surface.
- the problem is the fact that metal strips of different steel grades are increasingly being driven in the same strip line.
- it can be relatively soft steels, e.g. B. for special deep-drawing grades with yield strengths of approx. 140 to 180 N / mm2 and high-strength steels with yield strengths of approx. 300 to 600 N / mm2.
- With the usual strip thicknesses of around 0.4 to 0.8 mm and strip widths of up to 2000 mm can only be used for four-high roll stands for the desired strain hardening thin metal strips.
- the switch qualities may only undergo a slight strain hardening, especially since they have a steep hardening characteristic.
- a four-high mill stand for metal strips of this type may only be driven with a rolling force of 50 to 100 t and for the desired roughness with specially roughened rollers.
- these rollers lose their roughness due to contact with their backup rollers and therefore have to be changed frequently. This makes large tape storage in the inlet and outlet section necessary to bridge the changeover times, especially in continuously operating systems.
- the invention is based on the object of specifying a method and a system for producing a well-defined yield strength and at the same time surface roughness in the course of cold rolling of pretreated metal strips of different grades.
- this object is achieved in that the respective metal strip is subjected to a hardness puncture under predetermined strip tension and / or subsequently - with continuous strip running - the roughness.
- roughness means a certain surface conditioning.
- the desired yield strength and surface roughness can be rolled in two mutually independent, but successive treatment steps with continuously running metal strip.
- the hardness stitch can be dispensed with and the surface conditioning can be carried out with roughened rolls at low rolling pressures.
- the invention is based on the knowledge that the adjustable belt tension has a considerable influence on the degree of rolling and thus also on the strengthening and roughness of the strip material. This is particularly important if the hardness stitch is not used for special deep-drawing grades.
- the invention also relates to a system for carrying out the method according to the invention, with at least one inlet-side pull roller set and one outlet-side pull roller set for continuously running metal strips and a multi-roll stand, in particular a four-high roll stand, arranged between the two pull roll sets, for rolling a hardness pass.
- This system is characterized in that a duo-roll stand for rolling the roughness is arranged between the multi-roll stand and the set of traction rollers on the outlet side.
- the cold post-roll stand of known strip treatment plants is thus divided into a multi-roll stand for the hardness pass and into a duo roll stand for surface conditioning.
- the invention recommends that a tensile measuring device is connected upstream of the multi-roll stand, the subsequent duo-roll stand and the pull-out roller set on the outlet side, and that the drives of the multi-roll stand, duo-roll stand and pull-roller set on the outlet side are guided by the associated pull measurement devices.
- this enables the not exactly measurable elongation of the metal strip in question to be compensated for in the individual sections, on the other hand, the strip tension in front of and behind the roll stands can be adjusted within wide limits, in order to influence the degree of rolling and consequently the hardening and roughness of the tape material increase can.
- the inlet-side pull roller set expediently becomes the guide drive or speed master for the system according to the invention.
- roller straightening machine After each of the multi-roll stand and the duo roll stand. If, for example, you work with special deep-drawing quality via tensile measurement with little retraction and little preference when the multi-roll stand is open, the pull-out roller set on the outlet side tows the assigned straightening machine and applies its bending losses.
- a system for generating a predetermined yield strength and surface roughness in the course of the cold rolling of pretreated metal strips 1 is shown.
- this system has at least one outlet-side pulling roller set 2 and one outlet-side pulling roller set 5 for the continuously continuous metal strip 1 and a multi-roll stand 3, in particular a four-high roll stand, arranged between the two pulling roller sets 2, 5, for rolling a hardness pass.
- a duo-roll stand 4 is arranged for rolling on the roughness.
- a tensile measuring device T1, T2, T3 is connected upstream of the multi-roll stand 3, the subsequent two-roll stand 4 and the outlet-side pull roller set 5.
- the drives of the multi-roll stand 3, duo-roll stand 4 and the pull-roller set 5 on the outlet side are acted upon or guided by the associated tension measuring devices T1, T2, T3.
- the feed roller set 2 on the inlet side works as a Speedmaster.
- the multi-roll stand 3 and the duo roll stand 4 are each followed by a roller straightening machine 6, 7.
- the drives of the roll stands 3, 4 take up not only the power required for the rolling and the bearing losses, but also the respective difference between advance and retraction.
- the train distribution can e.g. B. be
- the yield strength of the special deep-drawing grades is only slightly increased, whereby the deformability is retained.
- the duo mill stand 4 and low strip tension as well as low rolling force of e.g. B. 70 to 100 t the cold deformation is about 0.3 to 0.5%.
- the roughness of the rolls is well transferred to the metal strip 1.
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- Metal Rolling (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Erzeugen einer vorgegebenen Streckgrenzen-Festigkeit und Oberflächen-Rauhigkeit im Zuge des Kaltnachwalzens vorbehandelter Metallbänder.The invention relates to a method for producing a predetermined yield strength and surface roughness in the course of the cold rolling of pretreated metal strips.
Für Metallbänder und insbesondere Bänder aus Stahl-Legierungen, sind Bandbehandlungsanlagen bekannt, bei denen einem oder mehreren Behandlungsteilen ein Kaltnachwalzgerüst in Duo-, Quarto- oder Mehrwalzen-Bauweise nachgeordnet ist. Als Behandlungsteile finden Einrichtungen zum chemischen Behandeln, zum Reinigen und Entfetten, zum Glühen und Wärmebehandeln, zum Beschichten mit metallischen Überzügen wie Zinn, Zink, Alu oder dergleichen, zum Auftragen von Farben, Lacken oder fotochemischen Schichten von Metallbändern Verwendung. Ein derartiges Kaltnachwalzgerüst wird häufig auch als Dressiergerüst bezeichnet.For metal strips and in particular strips made of steel alloys, strip treatment plants are known in which a cold post-rolling stand in duo, quarto or multi-roll construction is arranged after one or more treatment parts. The treatment parts used are devices for chemical treatment, for cleaning and degreasing, for annealing and heat treatment, for coating with metallic coatings such as tin, zinc, aluminum or the like, for applying paints, lacquers or photochemical layers of metal strips. Such a cold rolling mill is often also referred to as a skin pass mill.
Das Kaltnachwalzgerüst hat die Aufgabe, das Bandmaterial durch gezielte Kaltverformung auf eine vorgegebene Streckgrenzen-Frestigkeit einzustellen und gleichzeitig eine definierte Rauhigkeit von den Walzen auf die Bandoberfläche zu übertragen. Problematisch ist die Tatsache, daß in zunehmendem Maße in der gleichen Bandlinie Metallbänder unterschiedlicher Stahlgüten gefahren werden. So kann es sich beispielsweise um verhältnismäßig weiche Stähle, z. B. für Sondertiefziehgüten mit Streckgrenzen von ca. 140 bis 180 N/mm² und höherfeste Stähle mit Streckgrenzen von ca. 300 bis 600 N/mm² handeln. Bei den üblichen Banddicken von etwa 0,4 bis 0,8 mm und Bandbreiten bis zum 2000 mm sind für die gewünschte Kaltverfestigung nur noch Quarto-Walzgerüste einsetzbar, die in Abhängigkeit von dem jeweiligen Metallband mit Walzkräften von etwa 600 t bei Banddicken über 1,0 mm und bis zu etwa 1500 t bei Banddicken darunter bzw. bei dünnen Metallbändern gefahren werden. Die Weichenqualitäten, insbesondere die Sondertiefziehgüten, dürfen jedoch nur eine geringe Kaltverfestigung erfahren, zumal sie eine steile Verfestigungscharakteristik aufweisen. So darf ein Quarto-Walzgerüst für derartige Metallbänder nur mit einer Walzkraft von 50 bis 100 t und für die gewünschte Rauhigkeit mit speziell aufgerauhten Walzen gefahren werden. Jedoch verlieren diese Walzen ihre Rauhigkeit durch den Kontakt mit ihren Stützwalzen und müssen daher häufig gewechselt werden. Das macht insbesondere in kontinuierlich arbeitenden Anlagen große Bandspeicher im Ein- und Auslaufteil zum Überbrücken der Wechselzeiten erforderlich.The cold rolling mill has the task of setting the strip material to a predetermined yield strength by targeted cold forming and at the same time transferring a defined roughness from the rolls to the strip surface. The problem is the fact that metal strips of different steel grades are increasingly being driven in the same strip line. For example, it can be relatively soft steels, e.g. B. for special deep-drawing grades with yield strengths of approx. 140 to 180 N / mm² and high-strength steels with yield strengths of approx. 300 to 600 N / mm². With the usual strip thicknesses of around 0.4 to 0.8 mm and strip widths of up to 2000 mm can only be used for four-high roll stands for the desired strain hardening thin metal strips. However, the switch qualities, especially the special deep-drawing grades, may only undergo a slight strain hardening, especially since they have a steep hardening characteristic. A four-high mill stand for metal strips of this type may only be driven with a rolling force of 50 to 100 t and for the desired roughness with specially roughened rollers. However, these rollers lose their roughness due to contact with their backup rollers and therefore have to be changed frequently. This makes large tape storage in the inlet and outlet section necessary to bridge the changeover times, especially in continuously operating systems.
Ein anderes Problem besteht darin, daß für das Quarto-Walzgerüst ein großer Regelbereich zur hydraulischen Walzkraftanstellung erforderlich ist. Für hart zu walzende Metallbänder werden beispielsweise hydraulische Drücke von 250 bar bei 150 t Walzkraft erforderlich, während weiche Metallbänder wie Sondertiefziehbänder nur mit 8 bis 16 bar gefahren werden dürfen. Die Regeldruckschwankungen von etwa +/- 1 bar bei Servoventilen bedeuten in dem einen Fall eine walzkraft-Regelabweichung von +/- 0,4 %, bei dem anderen Fall jedoch eine Regelabweichung von +/- 12,5 % bzw. +/- 6,25 % mit entsprechend unterschiedlichen Kaltverfestigungs- und Rauhigkeitsgraden im gleichen Metallband. - Aus diesen Gründen ist es nicht möglich, eine wohldefinierte Streckgrenzen-Festigkeit und gleichzeitig eine wohldefinierte, uniforme Oberflächen-Rauhigkeit bei Metallbändern unterschiedlicher Güte zu erwalzen. Hier setzt die Erfindung ein.Another problem is that a large control range for the hydraulic rolling force adjustment is required for the four-high mill stand. For hard-to-roll metal strips, for example, hydraulic pressures of 250 bar at 150 t rolling force are required, while soft metal strips such as special deep-drawing strips may only be operated at 8 to 16 bar. The control pressure fluctuations of approximately +/- 1 bar for servo valves in one case mean a rolling force control deviation of +/- 0.4%, in the other case, however, a control deviation of +/- 12.5% or +/- 6 , 25% with correspondingly different levels of work hardening and roughness in the same metal band. For these reasons, it is not possible to roll a well-defined yield strength and at the same time a well-defined, uniform surface roughness in metal strips of different grades. This is where the invention comes in.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Anlage zum Erzeugen einer wohldefinierten Streckgrenzen-Festigkeit und gleichzeitig Oberflächen-Rauhigkeit im Zuge des Kaltnachwalzens von vorbehandelten Metallbändern unterschiedlicher Güte anzugeben.The invention is based on the object of specifying a method and a system for producing a well-defined yield strength and at the same time surface roughness in the course of cold rolling of pretreated metal strips of different grades.
Diese Aufgabe löst die Erfindung in verfahrensmäßiger Hinsicht dadurch, daß dem jeweiligen Metallband unter vorgegebenen Bandzügen ein Härtestich und/oder anschließend - bei kontinuierlichem Bandlauf - die Rauhigkeit aufgewalzt wird. Rauhigkeit meint im Rahmen der Erfindung eine bestimmte Oberflächen-Konditionierung. - Nach Lehre der Erfindung lassen sich also die jeweils gewünschte Streckgrenzen-Festigkeit und Oberflächen-Rauhigkeit in zwei voneinander unabhängigen, je-doch aufeinanderfolgenden Behandlungsschritten bei kontinuierlich durchlaufendem Metallband erwalzen. Tatsächlich besteht nunmehr die Möglichkeit, die Walzkraft sowohl für weiche Metallbänder als auch für harte Metallbänder optimal einzustellen und zu regeln. Bei Tiefziehqualitäten kann auf den Härtestich verzichtet werden und die Oberflächen-Konditionierung mit gerauhten Walzen bei niedrigen Walzdrücken erfolgen. In diesem Zusammenhang geht die Erfindung von der Erkenntnis aus, daß die einstellbaren Bandzüge einen erheblichen Einfluß auf den Walzgrad und damit auch auf die Verfestigung und Rauhigkeit des Bandmaterials haben. Das ist insbesondere dann auch von Bedeutung, wenn bei Sondertiefziehgüten auf den Härtestich verzichtet wird.In terms of the method, this object is achieved in that the respective metal strip is subjected to a hardness puncture under predetermined strip tension and / or subsequently - with continuous strip running - the roughness. In the context of the invention, roughness means a certain surface conditioning. - According to the teaching of the invention, the desired yield strength and surface roughness can be rolled in two mutually independent, but successive treatment steps with continuously running metal strip. In fact, there is now the possibility of optimally setting and regulating the rolling force both for soft metal strips and for hard metal strips. In the case of deep-drawing qualities, the hardness stitch can be dispensed with and the surface conditioning can be carried out with roughened rolls at low rolling pressures. In this connection, the invention is based on the knowledge that the adjustable belt tension has a considerable influence on the degree of rolling and thus also on the strengthening and roughness of the strip material. This is particularly important if the hardness stitch is not used for special deep-drawing grades.
Gegenstand der Erfindung ist auch eine Anlage zur Durchführung des erfindungsgemäßen Verfahrens, mit zumindest einem einlaufseitigen Zugrollensatz und einem auslaufseitigen Zugrollensatz für kontinuierlich durchlaufende Metallbänder und einem zwischen beiden Zugrollensätzen angeordneten Mehrwalzengerüst, insbesondere Quarto-Walzgerüst, zum Aufwalzen eines Härtestiches. Diese Anlage ist dadurch gekennzeichnet, daß zwischen dem Mehrwalzengerüst und dem auslaufseitigen Zugrollensatz ein Duo-Walzgerüst zum Aufwalzen der Rauhigkeit angeordnet ist. Das Kaltnachwalzgerüst bekannter Bandbehandlungsanlagen wird also gleichsam in ein Mehrwalzengerüst für den Härtestich und in ein Duo-Walzgerüst für die Oberflächen-Konditionierung aufgeteilt. Ferner empfiehlt die Erfindung, daß dem Mehrwalzengerüst, dem nachfolgenden Duo-Walzgerüst und dem auslaufseitigen Zugrollensatz jeweils eine Zugmeßvorrichtung vorgeschaltet ist und daß die Antriebe vom Mehrwalzengerüst, Duo-Walzgerüst und auslaufseitigem Zugrollensatz von den zugeordneten Zugmeßvorrichtungen geführt sind. Dadurch läßt sich einerseits die nicht genau meßbare Längung des betreffenden Metallbandes in den einzelnen Abschnitten kompensieren, lassen sich andererseits die Bandzüge vor und hinter den Walzgerüsten in weiten Grenzen einstellen, um eben auch, auf diese Weise Einfluß auf den Walzgrad und folglich die Verfestigung und Rauhigkeit des Bandmaterials nehmen zu können. Dabei wird der einlaufseitige Zugrollensatz zweckmäßigerweise zum Führantrieb bzw. Speedmaster für die erfindungsgemäße Anlage. Außerdem besteht die Möglichkeit, dem Mehrwalzengerüst und dem Duo-Walzgerüst jeweils eine Rollenrichtmaschine nachzuordnen. Arbeitet man beispielsweise bei Sondertiefziehgüte über die Zugmessung mit geringem Rückzug und geringem Vorzug bei geöffnetem Mehrwalzengerüst, dann führt der auslaufseitige Zugrollensatz die zugeordnete Richtmaschine im Schlepp und bringt deren Biegeverluste auf.The invention also relates to a system for carrying out the method according to the invention, with at least one inlet-side pull roller set and one outlet-side pull roller set for continuously running metal strips and a multi-roll stand, in particular a four-high roll stand, arranged between the two pull roll sets, for rolling a hardness pass. This system is characterized in that a duo-roll stand for rolling the roughness is arranged between the multi-roll stand and the set of traction rollers on the outlet side. The cold post-roll stand of known strip treatment plants is thus divided into a multi-roll stand for the hardness pass and into a duo roll stand for surface conditioning. Furthermore, the invention recommends that a tensile measuring device is connected upstream of the multi-roll stand, the subsequent duo-roll stand and the pull-out roller set on the outlet side, and that the drives of the multi-roll stand, duo-roll stand and pull-roller set on the outlet side are guided by the associated pull measurement devices. On the one hand, this enables the not exactly measurable elongation of the metal strip in question to be compensated for in the individual sections, on the other hand, the strip tension in front of and behind the roll stands can be adjusted within wide limits, in order to influence the degree of rolling and consequently the hardening and roughness of the tape material increase can. The inlet-side pull roller set expediently becomes the guide drive or speed master for the system according to the invention. There is also the option of placing a roller straightening machine after each of the multi-roll stand and the duo roll stand. If, for example, you work with special deep-drawing quality via tensile measurement with little retraction and little preference when the multi-roll stand is open, the pull-out roller set on the outlet side tows the assigned straightening machine and applies its bending losses.
Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert; es zeigen
- Fig. 1
- eine erfindungsgemäße Anlage in schematischer Seitenansicht und
- Fig. 2
- den Gegenstand nach Fig. 1 mit zwischengeschalteten Richtrollenmaschinen.
- Fig. 1
- an inventive system in a schematic side view
- Fig. 2
- 1 with intermediate straightening roll machines.
In den Figuren ist eine Anlage zum Erzeugen einer vorgegebenen Streckgrenzen-Festigkeit und Oberflächen-Rauhigkeit im Zuge des Kaltnachwalzens vorbehandelter Metallbänder 1 gezeigt. Diese Anlage weist in ihrem grundsätzlichen Aufbau zumindest einen auslaufseitigen Zugrollensatz 2 und einen auslaufseitigen Zugrollensatz 5 für das jeweils kontinuierlich durchlaufende Metallband 1 und ein zwischen beiden Zugrollensätzen 2, 5 angeordnetes Mehrwalzengerüst 3, insbesondere Quarto-Walzgerüst, zum Aufwalzen eines Härtestiches auf. Zwischen dem Mehrwalzengerüst 3 und dem auslaufseitigen Zugrollensatz 5 ist ein Duo-Walzgerüst 4 zum Aufwalzen der Rauhigkeit angeordnet. Dem Mehrwalzengerüst 3, dem nachfolgenden Duo-Walzgerüst 4 und dem auslaufseitigen Zugrollensatz 5 ist jeweils eine Zugmeßvorrichtung T1, T2, T3 vorgeschaltet. Die Antriebe vom Mehrwalzengerüst 3, Duo-Walzgerüst 4 und auslaufseitigem Zugrollensatz 5 sind von den zugeordneten Zugmeßvorrichtungen T1, T2, T3 beaufschlagt bzw. geführt. Der einlaufseitige Zugrollensatz 2 arbeitet als Speedmaster. Dem Mehrwalzengerüst 3 und dem Duo-Walzgerüst 4 ist jeweils eine Rollenrichtmaschine 6, 7 nachgeschaltet.In the figures, a system for generating a predetermined yield strength and surface roughness in the course of the cold rolling of pretreated metal strips 1 is shown. In its basic structure, this system has at least one outlet-side pulling roller set 2 and one outlet-side pulling roller set 5 for the continuously continuous metal strip 1 and a multi-roll stand 3, in particular a four-high roll stand, arranged between the two pulling roller sets 2, 5, for rolling a hardness pass. Between the multi-roll stand 3 and the outlet-side pulling roller set 5, a duo-roll stand 4 is arranged for rolling on the roughness. A tensile measuring device T1, T2, T3 is connected upstream of the multi-roll stand 3, the subsequent two-roll stand 4 and the outlet-side pull roller set 5. The drives of the multi-roll stand 3, duo-roll stand 4 and the pull-roller set 5 on the outlet side are acted upon or guided by the associated tension measuring devices T1, T2, T3. The feed roller set 2 on the inlet side works as a Speedmaster. The multi-roll stand 3 and the duo roll stand 4 are each followed by a roller straightening machine 6, 7.
Für harte Metallbänder wird wie folgt gefahren:
- a) über Zugmeßvorrichtung T1 Rückzug einstellen,
- b) mit Mehrwalzengerüst 3 Härtestich walzen,
- c) über Zugmeßvorrichtung T2 Rückzug für das Duo-Walzgerüst 4 einstellen,
- d) über Zugmeßvorrichtung T3 Vorzug für das Duo-Walzgerüst 4 einstellen,
- e) mit Duo-Walzgerüst 4 Rauhigkeit aufwalzen.
- a) set retraction via tension measuring device T1,
- b) roll 3 hardness pass with multi-roll stand,
- c) set the retraction for the duo mill stand 4 using the tension measuring device T2,
- d) set the preference for the duo mill stand 4 using the tension measuring device T3,
- e) Roll up 4 roughness with the Duo roll stand.
Hierbei nehmen die Antriebe der Walzgerüste 3, 4 neben der für das Walzen und die Lagerverluste erforderlichen Leistung auch die jeweilige Differenz zwischen Vor- und Rückzug auf. Die Zugverteilung kann z. B. sein
Für weiche Metallbänder, z. B. Sondertiefziehgüten, kann wie folgt gefahren werden:
- a) Mehrwalzengerüst 3 ist geöffnet,
- b) Rückzug für Duo-Walzgerüst 4 von Zugmeßvorrichtung T2,
- c) Vorzug für Duo-Walzgerüst 4 von Zugmeßvorrichtung T3,
Zugeinstellung, z. B. Rückzug zu Duo-Walzgerüst 4: 3 t
Vorzug zu Duo-Walzgerüst 4: 1,5 tFor soft metal strips, e.g. B. Special deep-drawing grades can be operated as follows:
- a) multi-roll stand 3 is open,
- b) withdrawal for duo mill stand 4 from tension measuring device T2,
- c) preference for duo mill stand 4 from tension measuring device T3,
Tension adjustment, e.g. B. Retreat to duo mill stand 4: 3 t
Preferred for duo mill stand 4: 1.5 t
Bei dieser Anordnung und Fahrweise wird die Streckgrenze der Sondertiefziehgüten lediglich geringfügig erhöht, wodurch die Verformbarkeit erhalten bleibt. Bei großen Walzendurchmessern dem Duo-Walzgerüstes 4 und geringen Bandzügen sowie geringer Walzkraft von z. B. 70 bis 100 t liegt die Kaltverformung bei etwa 0,3 bis 0,5 % Die Rauhigkeit der Walzen wird hierbei gut auf das Metallband 1 übertragen.With this arrangement and driving style, the yield strength of the special deep-drawing grades is only slightly increased, whereby the deformability is retained. With large roller diameters, the duo mill stand 4 and low strip tension as well as low rolling force of e.g. B. 70 to 100 t, the cold deformation is about 0.3 to 0.5%. The roughness of the rolls is well transferred to the metal strip 1.
Bei höherfesten Metallbändern 1 sind bei dem Duo-Walzgerüst 4 Walzkräfte von etwa 250 bis 300 t zum Aufbringen der Rauhigkeit erforderlich. Bei einem maximalen Druck von 250 bar beträgt die Regelabweichung
bei weichen Metallbändern 1, Walzkraft 70 t bei 84 bar +/- 1,1 %,
bei harten Metallbändern 1, Walzkraft 300 t bei 250 bar +/- 0,4 %,
d. h. auch bei weichen Metallbändern 1 ist die Walzkraft gut einstellbar und regelbar.In the case of high-strength metal strips 1, 4 rolling forces of approximately 250 to 300 t are required for applying the roughness in the duo roll stand. The control deviation is at a maximum pressure of 250 bar
with soft metal strips 1, rolling force 70 t at 84 bar +/- 1.1%,
with hard metal strips 1, rolling force 300 t at 250 bar +/- 0.4%,
that is, even with soft metal strips 1, the rolling force is easily adjustable and controllable.
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP90100562A EP0436762A1 (en) | 1990-01-12 | 1990-01-12 | Method and apparatus for achieving a predetermined yield point and surface roughness during cold-laminating of metallic pre-treated strips |
| CA 2033961 CA2033961A1 (en) | 1990-01-12 | 1991-01-10 | Method and arrangement for producing a predetermined yield strength and surface roughness of metal strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP90100562A EP0436762A1 (en) | 1990-01-12 | 1990-01-12 | Method and apparatus for achieving a predetermined yield point and surface roughness during cold-laminating of metallic pre-treated strips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0436762A1 true EP0436762A1 (en) | 1991-07-17 |
Family
ID=8203482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90100562A Withdrawn EP0436762A1 (en) | 1990-01-12 | 1990-01-12 | Method and apparatus for achieving a predetermined yield point and surface roughness during cold-laminating of metallic pre-treated strips |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0436762A1 (en) |
| CA (1) | CA2033961A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0679451A1 (en) * | 1994-04-27 | 1995-11-02 | Hoogovens Staal B.V. | Apparatus and method for the manufacture of DR steel strip |
| EP0972580A2 (en) * | 1998-07-14 | 2000-01-19 | Sms Schloemann-Siemag Aktiengesellschaft | Method for presetting cold-forming installations |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2287380A (en) * | 1940-10-15 | 1942-06-23 | Clarence J Klein | Metal rolling |
| US2306792A (en) * | 1939-06-15 | 1942-12-29 | Carl E Moore | Method of treating annealed strip steel |
| FR1563057A (en) * | 1968-02-16 | 1969-04-11 | ||
| DE2001915A1 (en) * | 1969-01-17 | 1970-07-23 | Uss Eng & Consult | Method and device for cold rolling |
| EP0046423A1 (en) * | 1980-08-18 | 1982-02-24 | Societe Des Forges De Basse-Indre | Method of executing the skin pass at a regulated rate in the rolling of steel strips annealed in a furnace |
| GB2114034A (en) * | 1982-02-03 | 1983-08-17 | Bwg Bergwerk Walzwerk | Process and pickling line for production of metal strip from hot-rolled strip, more particularly wide hot-rolled strip |
| GB2197233A (en) * | 1986-10-15 | 1988-05-18 | Bwg Bergwerk Walzwerk | Rolling of metal strip |
-
1990
- 1990-01-12 EP EP90100562A patent/EP0436762A1/en not_active Withdrawn
-
1991
- 1991-01-10 CA CA 2033961 patent/CA2033961A1/en not_active Abandoned
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2306792A (en) * | 1939-06-15 | 1942-12-29 | Carl E Moore | Method of treating annealed strip steel |
| US2287380A (en) * | 1940-10-15 | 1942-06-23 | Clarence J Klein | Metal rolling |
| FR1563057A (en) * | 1968-02-16 | 1969-04-11 | ||
| DE2001915A1 (en) * | 1969-01-17 | 1970-07-23 | Uss Eng & Consult | Method and device for cold rolling |
| EP0046423A1 (en) * | 1980-08-18 | 1982-02-24 | Societe Des Forges De Basse-Indre | Method of executing the skin pass at a regulated rate in the rolling of steel strips annealed in a furnace |
| GB2114034A (en) * | 1982-02-03 | 1983-08-17 | Bwg Bergwerk Walzwerk | Process and pickling line for production of metal strip from hot-rolled strip, more particularly wide hot-rolled strip |
| GB2197233A (en) * | 1986-10-15 | 1988-05-18 | Bwg Bergwerk Walzwerk | Rolling of metal strip |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 211 (M-501)[2267], 24 Juli 1986; & JP-A-61 52 907 (KAWASAKI STEEL CORP.) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0679451A1 (en) * | 1994-04-27 | 1995-11-02 | Hoogovens Staal B.V. | Apparatus and method for the manufacture of DR steel strip |
| NL9400674A (en) * | 1994-04-27 | 1995-12-01 | Hoogovens Groep Bv | Device and method for manufacturing DKG strip steel. |
| US5693287A (en) * | 1994-04-27 | 1997-12-02 | Hoogovens Staal Bv | Apparatus and method for the manufacture of DR steel strip |
| AU697297B2 (en) * | 1994-04-27 | 1998-10-01 | Hoogovens Staal Bv | Apparatus and method for the manufacture of DR steel strip |
| EP0972580A2 (en) * | 1998-07-14 | 2000-01-19 | Sms Schloemann-Siemag Aktiengesellschaft | Method for presetting cold-forming installations |
| EP0972580A3 (en) * | 1998-07-14 | 2002-12-11 | SMS Demag AG | Method for presetting cold-forming installations |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2033961A1 (en) | 1991-07-13 |
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