EP0570770A1 - Method and machine for straightening plates and strips - Google Patents

Method and machine for straightening plates and strips Download PDF

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Publication number
EP0570770A1
EP0570770A1 EP93107311A EP93107311A EP0570770A1 EP 0570770 A1 EP0570770 A1 EP 0570770A1 EP 93107311 A EP93107311 A EP 93107311A EP 93107311 A EP93107311 A EP 93107311A EP 0570770 A1 EP0570770 A1 EP 0570770A1
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Prior art keywords
straightening
machine
regulated
forces
rollers
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EP93107311A
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German (de)
French (fr)
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EP0570770B1 (en
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Willi Benz
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SMS Siemag AG
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SMS Schloemann Siemag AG
Schloemann Siemag AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the invention relates to a method for compensating the crossbeam deflection of a straightening machine and a straightening machine for sheets and strips with offset upper and lower straightening rollers, which are supported over their length by means of cross braces supported in turn, arranged in roller mills, at least the upper crossbar Positioning of the straightening rollers is adjustable.
  • a straightening roller group including a roller mill can be pre-bent, the transverse heads bending under the straightening force to such an extent that the preset V-shape disappears, the groups of support rollers are axially aligned and, accordingly, the straightening rollers are straight, so that the deflection accordingly the crosshead can be compensated.
  • the deflection also depends on the size of the preset V-shape of the crossheads.
  • the straightening rollers must be in contact with the likewise V-shaped groups of support rollers under idling conditions, which means that the straightening rollers must also be pre-bent in a V-shape by forces acting on their ends. Since that The extent of the straightening roll pre-bending must be considerable because of the strong kink position of the groups of support rollers, the straightening rolls - until they are just bent under the straightening force - are subjected to considerable bending stress. The sharp kinks are extremely disadvantageous for both the straightening and the backup rolls. In addition, it is not possible to adjust the straightening gap under load.
  • the invention has for its object to provide a method and a straightening machine of the type mentioned with which the operation can be improved, in particular the straightening gap can be set without the disadvantages mentioned.
  • the sheet width and sheet position in relation to the machine center and the total forces acting on the inlet and outlet sides to the left and right of the machine center on each adjusting cylinder are measured, from which and taking into account the crossbeam deflection, a computer calculates the percentage of individual forces, and the individual forces that change depending on the load then correspond to the measured cylinder forces and the calculated percentage distribution are regulated.
  • a variable regulation of the straightening gap under load is thus achieved as a function of the forces actually occurring during straightening, these forces, which counteract the forces widening the straightening gap, being set in accordance with the calculated percentages; a constant straightening gap can be maintained in this way.
  • the force of each of the four positioning cylinders which can be different for an eccentric sheet run and therefore an eccentric straightening force for each positioning cylinder, are known, the equilibrium of forces and the corresponding deformation equations as well as the condition that the roller mills have no deflection at the outer support points and only the deflection of the crossbeams is compensated for, the individual forces required between the support points to compensate for the crossbeam deflection. So that the roller mills have no deflection at the support points, the outermost individual forces acting symmetrically to the center of the machine preferably set themselves automatically due to the regulated straightening gap and only the internal individual forces are regulated. These external individual forces correspond to fixed stops.
  • a control deviation of the regulated individual forces is absorbed.
  • the differential force from the straightening force and the weight force must not exceed the balancing force.
  • top and bottom between the roller mill and the crossbar are arranged symmetrically to the machine center, outer fixed stops and between the fixed stops, plungers spaced apart from one another, each of which is at one Control valve is connected, all with a computer supplying them with control signals are connected.
  • the plungers arranged at the top and bottom which apply the individual forces for variably adapting the straightening gap to the actual operating conditions, of which four are advantageously arranged in a row in two rows one behind the other, enable a symmetrical system.
  • the individual forces distributed to compensate for the transverse beam deflection in proportion to their percentages are applied to a total of sixteen plungers, in that each plunger receives a signal via the control valve assigned to it.
  • the control signals can be transferred to the lower plungers, taking into account the weight of the roller mill. Due to the automatic straightening gap constant control, it does not matter whether a sheet runs in or out, the sheet strength changes during the run or the sheet is shifted off-center, etc., in any case the plungers automatically follow every change and also the ski training the sheet ends can at least be significantly reduced. As soon as the straightening force fluctuates, the pressure of the plungers is changed accordingly, which may all have a different plunger pressure.
  • Servo valves can advantageously be used for the pressure control according to the invention.
  • a measuring device determining the sheet position and width is connected to the computer, z. B. a diode line camera, the individual forces to be applied by the plungers can be adjusted depending on any center deviations of the sheet.
  • balancing cylinders are arranged on the inlet and outlet sides between the roller mills.
  • the balancing cylinders thus present at all four corners of the machine frame press the roller mills against the fixed stops of the crossbeams and ensure that the coupling and positioning of the roller mills is established.
  • the adjusting force of the balancing cylinders is greater than the control deviation, that is to say the cylinders are designed to be correspondingly larger, they continue to contribute to absorbing a control deviation, apart from exerting pressure upwards and downwards.
  • the machine frame is formed by two stands 2, 3 anchored to the foundation, which are rigidly connected by an upper and a lower crossbar 4, 4a and 5.
  • An upper roller mill 6 is held on the upper crossbar 4; a lower roller mill 7 is movably arranged on the lower crossbar 5.
  • the upper crossmember 4 can be adjusted against the lower crossmember 5 by means of the setting cylinder 10; each arranged on the inlet and outlet sides at the corners and thus a total of four positioning cylinders 10 engage the upper crossmember 4.
  • Adjustment wedges 8 are mounted on the lower roller mill 7, each of which can be displaced by a pressure medium cylinder 9.
  • a bearing bracket 11 for lower straightening rollers 12 and support rollers 13 associated therewith is supported on each wedge; webs 14 are arranged between the support rollers 13.
  • several upper straightening rollers 15 are arranged by support rollers arranged between webs 16 17 supported on their bales.
  • the upper straightening and support rollers 15, 17 are mounted on a bearing bracket 18.
  • Each of the adjacent bearing supports 18 is supported on an adjusting wedge 21, the other side of which rests on the upper roller mill 6.
  • the setting wedges 21 can be displaced by one pressure medium cylinder 22 each.
  • the upper and lower straightening rollers 15, 12 are individually driven and connected to a drive (not shown) via cardan shafts 23.
  • Both the upper and the lower crossmember 4, 5 are supported on the inlet and outlet sides at the top and bottom by means of outer fixed stops 25 arranged symmetrically to the machine center 24 against the roller mill 6 or 7. Furthermore, there are plungers 26 on the inlet and outlet side above and below between the upper cross-member 4 and the associated roller mill 6 or the lower cross-member 5 and the associated roller mill 7 with the same distance from one another between the fixed stops 25 Control valves 27 designed as servo valves are connected.
  • the four plungers 26, each arranged in a row between the fixed stops 25, are electrically connected to a computer 28 via their control valves 27, which is illustrated in FIG. 2 by the dashed lines there for an upper and a lower plunger 26 becomes.
  • a measuring device 31 which is assigned to the straightening machine 1 and which determines the position and the width of the sheet 29 to be straightened in relation to the machine center 24, as illustrated by the broken line leading from the measuring device 31 to the computer 28.
  • balancing cylinders 32 are arranged at all four corners, which exert a force up and down according to the arrows 33 and are also designed with such large cylinders that they are able to compensate for a control deviation that is, the Force generated by the balancing cylinders 32 is slightly greater than the directional force. Both the balancing cylinders 32 and the positioning cylinders 10 are - without being marked in the drawing - electrically connected to the computer 28.
  • the plungers 26 practice the deflection of the upper and lower crossbars 4 and 5 compensating, changing individual forces depending on the load; these are in Figure 2 on the left of the machine center 24 for the upper plungers with F11 F and F120 or for the lower plungers F11 u and F12 u and on the right of the machine center 24 for the upper plungers with Fr20 and Fr10 or for the lower plungers with Fr2 u and Fr1 u .
  • the control valves 27 assigned to the plungers 26 receive a control signal from the computer 28 in order to adjust that the individual forces according to their calculated percentage distribution depending on the forces actually occurring and the transverse beam bending function means that the plungers 26 are acted upon more or less.
  • any force setting can be achieved with the aim of keeping the straightening gap parallel or alternatively dynamically varying the straightening gap; the total force setting must not exceed the contact force.
  • the regulation of the straightening gap is carried out under load, the plungers 26 and the individual forces generated by them being variably and automatically adapted to changing operating conditions.

Abstract

In a method for compensating the bending of the crossbeams of a straightening (levelling) machine for sheets and strips with upper and lower straightening (levelling) rolls which are arranged offset relative to one another and are supported along their length by means of back-up rollers supported, for their part, against crossbeams and arranged in roller frames, in which arrangement at least the upper crossbeam can be adjusted in order to position the levelling rolls, operation is improved and, in particular, a constant levelling gap achieved if the levelling gap is regulated under load. In a levelling machine (1), outer fixed stops (25) and, spaced apart between the fixed stops (25), plungers (26) are arranged at the bottom and top at the entry and the exit sides between the roller frames (6 and 7) and the respective crossbeams (4 and 5) and symmetrically with respect to the machine centre (24). Each of these plungers is connected to a control valve (27) and all of these control valves are connected to a computer (28) which supplies them with control signals. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Kompensation der Quertraversendurchbiegung einer Richtmaschine sowie eine Richtmaschine für Bleche und Bänder mit versetzt zueinander angeordneten oberen und unteren Richtwalzen, die über ihre Länge mittels ihrerseits an Quertraversen abgestützten, in Walzenstühlen angeordneten Stützrollen abgestützt sind, wobei zumindest die obere Quertraverse zur Positionierung der Richtwalzen anstellbar ist.The invention relates to a method for compensating the crossbeam deflection of a straightening machine and a straightening machine for sheets and strips with offset upper and lower straightening rollers, which are supported over their length by means of cross braces supported in turn, arranged in roller mills, at least the upper crossbar Positioning of the straightening rollers is adjustable.

Es ist bekannt, die Stützrollen von Richtmaschinen derart voreinzustellen, daß unter Berücksichtigung der Durchbiegung der Quertraversen unter der Richtkraft die Richtwalzen-Durchbiegung kompensiert ist und damit die Richtwalzen beim Richten gerade sind. Zu diesem Zweck läßt sich bspw. eine Richtwalzengruppe samt Walzenstuhl vorbiegen, wobei sich die Querhäupter unter der Richtkraft soweit durchbiegen, daß die voreingestellte V-Form verschwindet, die Gruppen von Stützrollen axial fluchten und demgemäß die Richtwalzen gerade sind, so daß sich entsprechend die Durchbiegung der Querhäupter kompensieren läßt. Die Durchbiegung ist dabei auch von der Größe der voreingestellten V-Form der Querhäupter abhängig. Weiterhin müssen entsprechend die Richtwalzen unter Leerlaufbedingungen bereits an den ebenfalls V-förmig gerichteten Gruppen von Stützrollen anliegen, was bedeutet, daß auch die Richtwalzen durch an ihren Enden angreifende Kräfte V-förmig vorgebogen werden müssen. Da das Ausmaß der Richtwalzen-Vorbiegung wegen der starken Knicklage der Gruppen von Stützrollen beträchtlich sein muß, werden die Richtwalzen - bis sie unter der Richtkraft gerade gebogen sind - erheblich auf Biegung beansprucht. Die scharfen Knickstellen sind somit sowohl für die Richt- als auch für die Stützwalzen äußerst nachteilig. Hinzu kommt, daß ein Verstellen des Richtspaltes unter Last nicht möglich ist.It is known to preset the support rollers of straightening machines in such a way that, taking into account the deflection of the crossbeams under the straightening force, the straightening roll deflection is compensated and the straightening rolls are therefore straight when straightening. For this purpose, for example, a straightening roller group including a roller mill can be pre-bent, the transverse heads bending under the straightening force to such an extent that the preset V-shape disappears, the groups of support rollers are axially aligned and, accordingly, the straightening rollers are straight, so that the deflection accordingly the crosshead can be compensated. The deflection also depends on the size of the preset V-shape of the crossheads. Furthermore, the straightening rollers must be in contact with the likewise V-shaped groups of support rollers under idling conditions, which means that the straightening rollers must also be pre-bent in a V-shape by forces acting on their ends. Since that The extent of the straightening roll pre-bending must be considerable because of the strong kink position of the groups of support rollers, the straightening rolls - until they are just bent under the straightening force - are subjected to considerable bending stress. The sharp kinks are extremely disadvantageous for both the straightening and the backup rolls. In addition, it is not possible to adjust the straightening gap under load.

Schließlich sind, um einen konstanten Spalt einzuhalten, Richtmaschinen bekannt, bei denen der Richtspalt im Einlauf- und Auslaufbereich kleiner als in den dazwischen liegenden Abschnitten eingestellt wird. Das hat jedoch beim Ein- und Ausfahren eines zu richtenden Bleches zur Folge, daß sich am Blechanfang ein nach oben und am Blechende ein nach unten verlaufender sogenannter Ski ausbildet.Finally, in order to maintain a constant gap, straightening machines are known in which the straightening gap in the inlet and outlet areas is set smaller than in the sections in between. However, when a sheet to be straightened is retracted and extended, this results in a so-called ski forming at the top of the sheet and a downward running at the sheet end.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Richtmaschine der eingangs genannten Art zu schaffen, mit denen sich die Betriebsweise verbessern, insbesondere der Richtspalt ohne die genannten Nachteile einstellen läßt.The invention has for its object to provide a method and a straightening machine of the type mentioned with which the operation can be improved, in particular the straightening gap can be set without the disadvantages mentioned.

Diese Aufgabe wird für ein Verfahren erfindungsgemäß dadurch gelöst, daß der Richtspalt unter Last geregelt wird. Somit liegt ein während des Betriebes auch bei sich verändernden Betriebsparametern stets konstanter Richtspalt vor, der jedoch aufgrund der erfindungsgemäßen Regelmöglichkeit gleichwohl dynamisch variiert werden könnte.This object is achieved according to the invention in that the straightening gap is regulated under load. Thus, there is always a constant straightening gap during operation, even with changing operating parameters, but this could nevertheless be varied dynamically due to the possibility of regulation according to the invention.

Es wird vorgeschlagen, daß die Blechbreite und die Blechlage in Bezug auf die Maschinenmitte sowie die ein- und auslaufseitig links und rechts der Maschinenmitte an jedem Anstellzylinder wirkenden Gesamtkräfte gemessen werden, aus denen und unter Berücksichtigung der Quertraversendurchbiegung ein Rechner die prozentualen Anteile von Einzelkräften berechnet, und die sich lastabhängig geregelt verändernden Einzelkräfte dann entsprechend den gemessenen Zylinderkräften und der errechneten prozentualen Verteilung geregelt werden. Es wird somit ein variables Regeln des Richtspaltes unter Last in Abhängigkeit von den beim Richten tatsächlich auftretenden Kräften erreicht, wobei diese Kräfte, die den den Richtspalt aufweitenden Kräften entgegenwirken, entsprechend den errechneten, prozentualen Anteilen eingestellt werden; ein kontanter Richtspalt läßt sich auf diese Weise aufrechterhalten. Nachdem die links und rechts von der Maschinenmitte auftretenden Gesamtkräfte, d.h., die Kraft eines jeden der vier Anstellzylinder, die bei einem außermittigen Blechlauf und damit außermittiger Richtkraft bei jedem Anstellzylinder verschieden sein kann, bekannt sind, lassen sich aus dem Kräftegleichgewicht und den entsprechenden Verformungsgleichungen sowie der Bedingung, daß die Walzenstühle an äußeren Stützstellen keine Durchbiegung haben und nur die Durchbiegung der Quertraversen ausgeglichen wird, die zwischen den Stützstellen zur Kompensation der Quertraversen-Durchbiegung benötigten Einzelkräfte errechnen. Damit die Walzenstühle an den Stützstellen keine Durchbiegung haben, stellen sich vorzugsweise jeweils die äußersten symmetrisch zur Maschinenmitte wirkenden Einzelkräfte aufgrund des geregelten Richtspaltes selbsttätig ein und werden nur die inneren Einzelkräfte geregelt. Diese äußeren Einzelkräfte entsprechen Festanschlägen.It is proposed that the sheet width and sheet position in relation to the machine center and the total forces acting on the inlet and outlet sides to the left and right of the machine center on each adjusting cylinder are measured, from which and taking into account the crossbeam deflection, a computer calculates the percentage of individual forces, and the individual forces that change depending on the load then correspond to the measured cylinder forces and the calculated percentage distribution are regulated. A variable regulation of the straightening gap under load is thus achieved as a function of the forces actually occurring during straightening, these forces, which counteract the forces widening the straightening gap, being set in accordance with the calculated percentages; a constant straightening gap can be maintained in this way. After the total forces occurring to the left and right of the machine center, i.e. the force of each of the four positioning cylinders, which can be different for an eccentric sheet run and therefore an eccentric straightening force for each positioning cylinder, are known, the equilibrium of forces and the corresponding deformation equations as well as the condition that the roller mills have no deflection at the outer support points and only the deflection of the crossbeams is compensated for, the individual forces required between the support points to compensate for the crossbeam deflection. So that the roller mills have no deflection at the support points, the outermost individual forces acting symmetrically to the center of the machine preferably set themselves automatically due to the regulated straightening gap and only the internal individual forces are regulated. These external individual forces correspond to fixed stops.

Nach einem Vorschlag der Erfindung wird eine Regelabweichung der geregelten Einzelkräfte aufgefangen. Zu diesem Zweck darf die Differenzkraft aus der Richtkraft und der Gewichtskraft die Ausbalancierungskraft nicht überschreiten.According to a proposal of the invention, a control deviation of the regulated individual forces is absorbed. For this purpose, the differential force from the straightening force and the weight force must not exceed the balancing force.

Bei einer Richtmaschine für Bleche und Bänder mit Kompensation der Quertraversen-Durchbiegung sind erfindungsgemäß ein- und auslaufseitig jeweils oben und unten zwischen dem Walzenstuhl und der Quertraverse symmetrisch zur Maschinenmitte äußere Festanschläge und zwischen den Festanschlägen mit Abstand voneinander verteilt Plunger angeordnet, von denen jeder an ein Regelventil angeschlossen ist, die sämtlich mit einem sie mit Regelsignalen versorgenden Rechner verbunden sind. Die jeweils oben und unten angeordneten, die Einzelkräfte zum variablen Anpassen des Richtspaltes an die tatsächlichen Betriebsbedingungen aufbringenden Plunger, von denen vorteilhaft in zwei hintereinanderliegenden Reihen jeweils vier in einer Reihe angeordnet sind, ermöglichen ein symmetrisches System. Auf die insgesamt sechzehn Plunger werden die zur Kompensation der Quertraversen-Durchbiegung im Verhältnis ihrer prozentualen Anteile verteilten Einzelkräfte aufgebracht, indem jeder Plunger über das ihm zugeordnete Regelventil ein Signal erhält. Die Regelsignale lassen sich dabei - unter Berücksichtigung des Gewichts des Walzenstuhls - sinngemäß auf die unteren Plunger übertragen. Aufgrund der somit selbsttätigen Richtspalt-Konstantregelung ist es gleich, ob ein Blech ein- oder ausläuft, sich die Blechfestigkeit während des Durchlaufs ändert oder das Blech außermittig verlagert wird, etc., auf jeden Fall folgen die Plunger jeder Veränderung automatisch und auch die Skiausbildung an den Blechenden läßt sich zumindest wesentlich verringern. Sobald die Richtkraft schwankt, wird entsprechend der Druck der Plunger geändert, die gegebenenfalls sämtlich einen anderen Plungerdruck aufweisen können. Für die erfindungsgemäße Druckregelung lassen sich vorteilhaft Servo-Ventile einsetzen.In a straightening machine for sheets and strips with compensation of the crossbeam deflection, according to the invention, on the inlet and outlet sides, top and bottom between the roller mill and the crossbar are arranged symmetrically to the machine center, outer fixed stops and between the fixed stops, plungers spaced apart from one another, each of which is at one Control valve is connected, all with a computer supplying them with control signals are connected. The plungers arranged at the top and bottom, which apply the individual forces for variably adapting the straightening gap to the actual operating conditions, of which four are advantageously arranged in a row in two rows one behind the other, enable a symmetrical system. The individual forces distributed to compensate for the transverse beam deflection in proportion to their percentages are applied to a total of sixteen plungers, in that each plunger receives a signal via the control valve assigned to it. The control signals can be transferred to the lower plungers, taking into account the weight of the roller mill. Due to the automatic straightening gap constant control, it does not matter whether a sheet runs in or out, the sheet strength changes during the run or the sheet is shifted off-center, etc., in any case the plungers automatically follow every change and also the ski training the sheet ends can at least be significantly reduced. As soon as the straightening force fluctuates, the pressure of the plungers is changed accordingly, which may all have a different plunger pressure. Servo valves can advantageously be used for the pressure control according to the invention.

Wenn mit dem Rechner ein die Blechlage und -breite bezogen auf die Maschinenmitte ermittelndes Meßgerät verbunden ist, z. B. eine Dioden-Zeilenkamera, lassen sich die von den Plungern aufzubringenden Einzelkräfte abhängig von etwaigen Mittenabweichungen des Bleches einregeln.If a measuring device determining the sheet position and width is connected to the computer, z. B. a diode line camera, the individual forces to be applied by the plungers can be adjusted depending on any center deviations of the sheet.

Es wird vorgeschlagen, daß ein- und auslaufseitig zwischen den Walzenstühlen Ausbalancierungszylinder angeordnet sind. Die somit an allen vier Ecken des Maschinenrahmens vorhandenen Ausbalancierungszylinder pressen die Walzenstühle gegen die Festanschläge der Quertraversen und sorgen dafür, daß die Kopplung und Positionierung der Walzenstühle hergestellt wird.It is proposed that balancing cylinders are arranged on the inlet and outlet sides between the roller mills. The balancing cylinders thus present at all four corners of the machine frame press the roller mills against the fixed stops of the crossbeams and ensure that the coupling and positioning of the roller mills is established.

Wenn die Anstellkraft der Ausbalancierungszylinder größer ist als die Regelabweichung, das heißt, die Zylinder entsprechend größer ausgelegt sind, tragen sie, außer Druck nach oben und unten auszuüben, weiterhin dazu bei, eine Regelabweichung aufzufangen.If the adjusting force of the balancing cylinders is greater than the control deviation, that is to say the cylinders are designed to be correspondingly larger, they continue to contribute to absorbing a control deviation, apart from exerting pressure upwards and downwards.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
eine erfindungsgemäße Rollenrichtmaschine im Querschnitt dargestellt; und
Figur 2
eine Schema-Zeichnung der Rollenrichtmaschine gemäß Figur 1 mit dem darin symbolhaft eingetragenen Regelkonzept zur Kompensation der Quertraversendurchbiegung.
The invention is explained in more detail below with reference to an embodiment shown in the drawings. Show it:
Figure 1
a roller straightening machine according to the invention shown in cross section; and
Figure 2
2 shows a schematic drawing of the roller straightening machine according to FIG. 1 with the control concept symbolically entered therein to compensate for the transverse beam deflection.

Bei einer Rollenrichtmaschine 1 wird der Maschinenrahmen durch zwei am Fundament verankerte Ständer 2, 3 gebildet, die durch eine obere und eine untere Quertraverse 4, 4a und 5 starr verbunden sind. An der oberen Quertraverse 4 ist ein oberer Walzenstuhl 6 gehalten; ein unterer Walzenstuhl 7 ist verfahrbar auf der unteren Quertraverse 5 angeordnet. Die obere Quertraverse 4 ist über Anstellzylinder 10 gegen die untere Quertraverse 5 anstellbar; jeweils ein- und auslaufseitig an den Ecken angeordnete und somit insgesamt vier Anstellzylinder 10 greifen an die obere Quertraverse 4 an.In the case of a roller straightening machine 1, the machine frame is formed by two stands 2, 3 anchored to the foundation, which are rigidly connected by an upper and a lower crossbar 4, 4a and 5. An upper roller mill 6 is held on the upper crossbar 4; a lower roller mill 7 is movably arranged on the lower crossbar 5. The upper crossmember 4 can be adjusted against the lower crossmember 5 by means of the setting cylinder 10; each arranged on the inlet and outlet sides at the corners and thus a total of four positioning cylinders 10 engage the upper crossmember 4.

Auf dem unteren Walzenstuhl 7 sind Anstellkeile 8 gelagert, die durch je einen Druckmittelzylinder 9 verschiebbar sind. Auf jedem Anstellkeil ist ein Lagerträger 11 für untere Richtrollen 12 und diesen zugeordneten Stützrollen 13 abgestützt; zwischen den Stützrollen 13 sind jeweils Stege 14 angeordnet. Weiterhin sind mehrere obere Richtrollen 15 durch zwischen Stegen 16 angeordneten Stützrollen 17 an ihren Ballen abgestützt. Die oberen Richt- und Stützrollen 15, 17 sind an einen Lagerträger 18 gelagert. Jeder der benachbarten Lagerträger 18 ist an einen Anstellkeil 21 abgestützt, dessen andere Seite am oberen Walzenstuhl 6 anliegt. Die Anstellkeile 21 sind durch je einen Druckmittelzylinder 22 verschiebbar. Die oberen und unteren Richtrollen 15, 12 sind einzeln angetrieben und über Gelenkwellen 23 mit einem nicht dargestellten Antrieb verbunden.Adjustment wedges 8 are mounted on the lower roller mill 7, each of which can be displaced by a pressure medium cylinder 9. A bearing bracket 11 for lower straightening rollers 12 and support rollers 13 associated therewith is supported on each wedge; webs 14 are arranged between the support rollers 13. Furthermore, several upper straightening rollers 15 are arranged by support rollers arranged between webs 16 17 supported on their bales. The upper straightening and support rollers 15, 17 are mounted on a bearing bracket 18. Each of the adjacent bearing supports 18 is supported on an adjusting wedge 21, the other side of which rests on the upper roller mill 6. The setting wedges 21 can be displaced by one pressure medium cylinder 22 each. The upper and lower straightening rollers 15, 12 are individually driven and connected to a drive (not shown) via cardan shafts 23.

Sowohl die obere als auch die untere Quertraverse 4, 5 ist ein- und auslaufseitig jeweils oben und unten über symmetrisch zur Maschinenmitte 24 angeordnete äußere Festanschläge 25 gegen den Walzenstuhl 6 bzw. 7 abgestützt. Weiterhin befinden sich an der Ein- und Auslaufseite oben und unten jeweils zwischen der oberen Quertraverse 4 und dem ihr zugeordneten Walzenstuhl 6 bzw. der unteren Quertraverse 5 und dem ihr zugeordneten Walzenstuhl 7 mit gleichem Abstand voneinander zwischen den Festanschlägen 25 angeordnete Plunger 26, an die als Servoventile ausgeführte Regelventile 27 angeschlossen sind.Both the upper and the lower crossmember 4, 5 are supported on the inlet and outlet sides at the top and bottom by means of outer fixed stops 25 arranged symmetrically to the machine center 24 against the roller mill 6 or 7. Furthermore, there are plungers 26 on the inlet and outlet side above and below between the upper cross-member 4 and the associated roller mill 6 or the lower cross-member 5 and the associated roller mill 7 with the same distance from one another between the fixed stops 25 Control valves 27 designed as servo valves are connected.

Wie sich aus Figur 2 ergibt, sind die vier jeweils in einer Reihe zwischen den Festanschlägen 25 angeordneten Plunger 26 über ihre Regelventile 27 elektrisch an einen Rechner 28 angeschlossen, was in Figur 2 durch die dort für einen oberen und einen unteren Plunger 26 gestrichelten Linien verdeutlicht wird. An den Rechner 28 ist weiterhin ein der Richtmaschine 1 zugeordnetes, die Lage und die Breite des zu richtenden Bleches 29 bezogen auf die Maschinenmitte 24 ermittelndes Meßgerät 31 angeschlossen, wie durch die von dem Meßgerät 31 zu dem Rechner 28 führende gestrichelte Linie verdeutlicht. Zur Kopplung und Positionierung der Walzenstühle 6, 7 sind an allen vier Ecken Ausbalancierungszylinder 32 angeordnet, die entsprechend den Pfeilen 33 eine Kraft nach oben und unten ausüben und außerdem mit solch großen Zylindern ausgelegt sind, daß sie in der Lage sind, eine Regelabweichung zu kompensieren, daß heißt, die von den Ausbalancierungszylindern 32 erzeugte Kraft ist etwas größer als die Richtkraft. Sowohl die Ausbalancierungszylinder 32 als auch die Anstellzylinder 10 sind - ohne daß das in der Zeichnung gekennzeichnet ist - elektrisch mit dem Rechner 28 verbunden.As can be seen from FIG. 2, the four plungers 26, each arranged in a row between the fixed stops 25, are electrically connected to a computer 28 via their control valves 27, which is illustrated in FIG. 2 by the dashed lines there for an upper and a lower plunger 26 becomes. Connected to the computer 28 is a measuring device 31 which is assigned to the straightening machine 1 and which determines the position and the width of the sheet 29 to be straightened in relation to the machine center 24, as illustrated by the broken line leading from the measuring device 31 to the computer 28. For coupling and positioning the roller mills 6, 7, balancing cylinders 32 are arranged at all four corners, which exert a force up and down according to the arrows 33 and are also designed with such large cylinders that they are able to compensate for a control deviation that is, the Force generated by the balancing cylinders 32 is slightly greater than the directional force. Both the balancing cylinders 32 and the positioning cylinders 10 are - without being marked in the drawing - electrically connected to the computer 28.

Damit die beim Richten des Bleches 29 auftretende Kraft Q nicht zu einer Aufweitung des Richtspaltes führt und sich die parallele Lage der oberen zu den unteren Richtwalzen 15, 12 einhalten läßt, üben die Plunger 26 die Durchbiegung der oberen bzw. unteren Quertraverse 4 bzw. 5 kompensierende, sich lastabhängig geregelt verändernde Einzelkräfte aus; diese sind in Figur 2 links der Maschinenmitte 24 für die oberen Plunger mit F11₀ und F12₀ bzw. für die unteren Plunger F11u und F12u sowie rechts der Maschinenmitte 24 für die oberen Plunger mit Fr2₀ und Fr1₀ bzw. für die unteren Plunger mit Fr2u und Fr1u bezeichnet. Da die Walzenstühle 6 bzw. 7 an den Stützstellen der äußeren Festanschläge 25 keine Durchbiegung haben, sind diese Stützstellen mit F10₀, F10u bzw. Fr0₀, Fr0u bezeichnet. Aus den links und rechts der Maschinenmitte 24 von den dort jeweils zwei Anstellzylindern 10 auf die Richtmaschine 1 ausgeübten Gesamtkräfte F11/2 und Fr1/2 ergeben sich die Einzelkräfte F11₀, Fr1u und F12₀, F12u bzw. Fr2₀, Fr2u und Fr1₀, Fr1u, deren prozentualen Anteile bezogen auf die Gesamtkräfte F11/2 und Fr1/2 der Rechner 28 ermittelt. Sobald beim Richten des Bleches 29 die dann tatsächlich auftretenden, realen Kräfte feststehen, erhalten die den Plungern 26 zugeordneten Regelventile 27 von dem Rechner 28 ein Regelsignal, um die Einzelkräfte entsprechend ihrer errechneten prozentualen Verteilung abhängig von den tatsächlich auftretenden Kräften und der Quertraversenbiegefunktion einzustellen, daß heißt, die Plunger 26 werden mehr oder weniger beaufschlagt. Auf diese Weise läßt sich jede beliebige Krafteinstellung erreichen, mit dem Ziel, den Richtspalt parallel zu halten, bzw. den Richtspalt alternativ dynamisch zu variieren; die Krafteinstellung darf dabei aber in der Summe die Anstellkraft nicht überschreiten. Die Regelung des Richtspaltes wird hierbei unter Last durchgeführt, wobei die Plunger 26 bzw. die von ihnen erzeugten Einzelkräfte variabel und selbsttätig an sich ändernde Betriebsbedingungen angepaßt werden.So that the force Q occurring when straightening the sheet 29 does not lead to an expansion of the straightening gap and the parallel position of the upper to the lower straightening rollers 15, 12 can be maintained, the plungers 26 practice the deflection of the upper and lower crossbars 4 and 5 compensating, changing individual forces depending on the load; these are in Figure 2 on the left of the machine center 24 for the upper plungers with F11 F and F12₀ or for the lower plungers F11 u and F12 u and on the right of the machine center 24 for the upper plungers with Fr2₀ and Fr1₀ or for the lower plungers with Fr2 u and Fr1 u . Since the roller mills 6 and 7 have no deflection at the support points of the outer fixed stops 25, these support points are designated with F10₀, F10 u or Fr0₀, Fr0 u . The individual forces F11₀, Fr1 u and F12₀, F12 u and Fr2₀, Fr2 u and Fr1₀, respectively, result from the total forces F11 / 2 and Fr1 / 2 exerted on the left and right of the machine center 24 by the two respective setting cylinders 10 there on the straightening machine 1. Fr1 u , the percentage of which, based on the total forces F11 / 2 and Fr1 / 2, is determined by the computer 28. As soon as the real forces that actually occur when the sheet 29 is straightened out, the control valves 27 assigned to the plungers 26 receive a control signal from the computer 28 in order to adjust that the individual forces according to their calculated percentage distribution depending on the forces actually occurring and the transverse beam bending function means that the plungers 26 are acted upon more or less. In this way, any force setting can be achieved with the aim of keeping the straightening gap parallel or alternatively dynamically varying the straightening gap; the total force setting must not exceed the contact force. The regulation of the straightening gap is carried out under load, the plungers 26 and the individual forces generated by them being variably and automatically adapted to changing operating conditions.

Claims (10)

Verfahren zur Kompensation der Quertraversen-Durchbiegung einer Richtmaschine für Bleche und Bänder mit versetzt zueinander angeordneten oberen und unteren Richtwalzen, die über ihre Länge mittels ihrerseits an Quertraversen abgestützten, in Walzenstühlen angeordneten Stützrollen abgestützt sind, wobei zumindest die obere Quertraverse zur Positionierung der Richtwalzen anstellbar ist,
dadurch gekennzeichnet,
daß der Richtspalt unter Last geregelt wird.
Method for compensating the crossbeam deflection of a straightening machine for sheets and strips with offset upper and lower straightening rollers, which are supported along their length by means of support rollers which are in turn supported on crossbeams and arranged in roller mills, at least the upper crossbar being adjustable for positioning the straightening rollers ,
characterized,
that the straightening gap is regulated under load.
Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Blechbreite und die Blechlage in Bezug auf Maschinenmitte sowie die ein- und auslaufseitig links und recht der Maschinenmitte an jedem Anstellzylinder auftretenden Gesamtkräfte gemessen werden, aus denen und unter Berücksichtigung der Quertraversendurchbiegung ein Rechner die prozentualen Anteile von Einzelkräften berechnet, und daß die sich lastabhängig geregelt verändernden Einzelkräfte dann entsprechend den gemessenen Zylinderkräften und der errechneten prozentualen Verteilung geregelt werden.
Method according to claim 1,
characterized,
that the sheet width and sheet position in relation to the machine center as well as the total forces occurring on the inlet and outlet sides left and right of the machine center on each pitch cylinder are measured, from which and taking into account the crossbeam deflection, a computer calculates the percentage of individual forces, and that this depends on the load regulated changing individual forces are then regulated according to the measured cylinder forces and the calculated percentage distribution.
Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß sich jeweils die äußersten symmetrisch zur Maschinenmitte wirkenden Einzelkräfte aufgrund des geregelten Richtspaltes selbsttätig einstellen und die inneren Einzelkräfte geregelt werden.
The method of claim 1 or 2,
characterized,
that the outermost individual forces acting symmetrically to the machine center are automatically set due to the regulated straightening gap and the internal individual forces are regulated.
Verfahren nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß eine Regelabweichung der geregelten Einzelkräfte aufgefangen wird.
Method according to one or more of claims 1 to 3,
characterized,
that a control deviation of the regulated individual forces is absorbed.
Richtmaschine für Bleche und Bänder mit versetzt zueinander angeordneten oberen und unteren Richtwalzen, die über ihre Länge mittels ihrerseits an Quertraversen abgestützten, in Walzenstühlen angeordneten Stützrollen abgestützt sind, wobei zumindest die obere Quertraverse zur Positionierung der Richtwalzen anstellbar ist,
dadurch gekennzeichnet,
daß ein- und auslaufseitig jeweils oben und unten zwischen dem Walzenstuhl (6 bzw. 7) und der Quertraverse (4 bzw. 5) symmetrisch zur Maschinenmitte (24) äußere Festanschläge (25) und zwischen den Festanschlägen (25) mit Abstand voneinander verteilt Plunger (26) angeordnet sind, von denen jeder an ein Regelventil (27) angeschlossen ist, die sämtlich mit einem sie mit Regelsignalen versorgenden Rechner (28) verbunden sind.
Straightening machine for sheets and strips with staggered upper and lower straightening rollers, which are supported along their length by means of support rollers which are in turn supported on cross beams and arranged in roller mills, at least the upper cross beam being adjustable for positioning the straightening rollers,
characterized,
that the inlet and outlet side each top and bottom between the roller mill (6 or 7) and the cross-beam (4 or 5) symmetrical to the machine center (24) outer fixed stops (25) and between the fixed stops (25) spaced apart plunger (26) are arranged, each of which is connected to a control valve (27), all of which are connected to a computer (28) which supplies them with control signals.
Richtmaschine nach Anspruch 5,
gekennzeichnet durch
zwei hintereinander angeordnete Reihen aus jeweils vier Plungern (26).
Straightening machine according to claim 5,
marked by
two rows of four plungers (26) arranged one behind the other.
Richtmaschine nach Anspruch 5 oder 6,
dadurch gekennzeichnet,
daß die Regelventile (27) als Servoventile ausgebildet sind.
Straightening machine according to claim 5 or 6,
characterized,
that the control valves (27) are designed as servo valves.
Richtmaschine nach einem oder mehreren der Ansprüche 5 bis 7,
dadurch gekennzeichnet,
daß mit dem Rechner (28) ein die Blechlage und -breite bezogen auf die Maschinenmitte (24) ermittelndes Meßgerät (31) verbunden ist.
Straightening machine according to one or more of claims 5 to 7,
characterized,
that a measuring device (31) determining the sheet metal position and width relative to the machine center (24) is connected to the computer (28).
Richtmaschine nach einem oder mehreren der Ansprüche 5 bis 8,
dadurch gekennzeichnet,
daß ein und auslaufseitig zwischen den Walzenstühlen (6, 7) Ausbalancierungszylinder (32) angeordnet sind.
Straightening machine according to one or more of claims 5 to 8,
characterized,
that balancing cylinders (32) are arranged on the inlet and outlet sides between the roller mills (6, 7).
Richtmaschine nach Anspruch 9,
dadurch gekennzeichnet,
daß die Anstellkraft der Ausbalancierungszylinder (32) größer ist als die Regelabweichung der Plunger (26).
Straightening machine according to claim 9,
characterized,
that the adjusting force of the balancing cylinder (32) is greater than the control deviation of the plunger (26).
EP93107311A 1992-05-21 1993-05-05 Method for straightening plates and strips Expired - Lifetime EP0570770B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4216686A DE4216686A1 (en) 1992-05-21 1992-05-21 Process and straightening machine for straightening sheets and strips
DE4216686 1992-05-21

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EP0570770A1 true EP0570770A1 (en) 1993-11-24
EP0570770B1 EP0570770B1 (en) 1997-07-30

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AT (1) ATE156046T1 (en)
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US5461895A (en) * 1993-12-09 1995-10-31 Danieli United, Inc. High capacity hydraulic leveller
WO1996032212A1 (en) * 1995-04-14 1996-10-17 Clecim Levelling machine with overlapping rollers, and method for using same
FR2732913A1 (en) * 1995-04-14 1996-10-18 Clecim Sa Levelling machine for levelling flat products in a continuous strip mill
EP0767014A1 (en) * 1995-10-06 1997-04-09 Kvaerner Clecim Straightening machine with parallel cylinders
US5680785A (en) * 1994-04-15 1997-10-28 Clecim Metal strip planishing installation
FR2860738A1 (en) * 2003-10-13 2005-04-15 Vai Clecim Product e.g. metallic band, path controlling method for flattening machine, involves positioning jacks for adjusting nesting of flattening rollers for maintaining measured value of gap between rollers to be equal to reference value
CN104457670A (en) * 2014-12-14 2015-03-25 天津博信汽车零部件有限公司 Semi-automatic cushion gap detection device
CN104942048A (en) * 2015-06-30 2015-09-30 中国二十冶集团有限公司 Disassembling method for upper slanting wedge of roller type cold straightening machine
DE102017124027A1 (en) 2017-10-16 2019-04-18 Schuler Automation Gmbh & Co. Kg Method, device and computer program product for adjusting the bending of at least one straightening roller of a roller straightening machine

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DE102004041732A1 (en) 2004-08-28 2006-03-02 Sms Demag Ag Method of straightening a metal strip and straightening machine
IN2012DN02039A (en) 2009-09-09 2015-08-21 Siemens Vai Metals Tech Sas
DE102021101054A1 (en) 2021-01-19 2022-07-21 Kohler Maschinenbau Gmbh Straightening machine for straightening metal strips or flat metal parts, and method for operating such a machine

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5461895A (en) * 1993-12-09 1995-10-31 Danieli United, Inc. High capacity hydraulic leveller
US5680785A (en) * 1994-04-15 1997-10-28 Clecim Metal strip planishing installation
WO1996032212A1 (en) * 1995-04-14 1996-10-17 Clecim Levelling machine with overlapping rollers, and method for using same
FR2732913A1 (en) * 1995-04-14 1996-10-18 Clecim Sa Levelling machine for levelling flat products in a continuous strip mill
FR2732912A1 (en) * 1995-04-14 1996-10-18 Clecim Sa Nested roller planer
EP0767014A1 (en) * 1995-10-06 1997-04-09 Kvaerner Clecim Straightening machine with parallel cylinders
FR2739578A1 (en) * 1995-10-06 1997-04-11 Clecim Sa PARALLEL CYLINDER PLANER
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FR2860738A1 (en) * 2003-10-13 2005-04-15 Vai Clecim Product e.g. metallic band, path controlling method for flattening machine, involves positioning jacks for adjusting nesting of flattening rollers for maintaining measured value of gap between rollers to be equal to reference value
WO2005046899A1 (en) * 2003-10-13 2005-05-26 Vai Clecim Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same
CN100364681C (en) * 2003-10-13 2008-01-30 韦克莱奇姆公司 Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same
US7475581B2 (en) 2003-10-13 2009-01-13 Siemens Vai Metals Technologies Sas Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same
CN104457670A (en) * 2014-12-14 2015-03-25 天津博信汽车零部件有限公司 Semi-automatic cushion gap detection device
CN104457670B (en) * 2014-12-14 2017-08-01 天津博信汽车零部件有限公司 A kind of semi-automatic cushion gap detection equipment
CN104942048A (en) * 2015-06-30 2015-09-30 中国二十冶集团有限公司 Disassembling method for upper slanting wedge of roller type cold straightening machine
DE102017124027A1 (en) 2017-10-16 2019-04-18 Schuler Automation Gmbh & Co. Kg Method, device and computer program product for adjusting the bending of at least one straightening roller of a roller straightening machine
US11596989B2 (en) 2017-10-16 2023-03-07 Schuler Pressen Gmbh Method and computer program product for setting the bending of at least one straightening roller of a roller straightening machine

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ATE156046T1 (en) 1997-08-15
EP0570770B1 (en) 1997-07-30
ES2106222T3 (en) 1997-11-01
DE59306992D1 (en) 1997-09-04
DE4216686A1 (en) 1993-11-25

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