EP0572829B1 - Roll adjustment device - Google Patents

Roll adjustment device Download PDF

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Publication number
EP0572829B1
EP0572829B1 EP93107709A EP93107709A EP0572829B1 EP 0572829 B1 EP0572829 B1 EP 0572829B1 EP 93107709 A EP93107709 A EP 93107709A EP 93107709 A EP93107709 A EP 93107709A EP 0572829 B1 EP0572829 B1 EP 0572829B1
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EP
European Patent Office
Prior art keywords
adjusting device
roll
piston
adjusting
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93107709A
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German (de)
French (fr)
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EP0572829A1 (en
Inventor
Willi Benz
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SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Publication of EP0572829A1 publication Critical patent/EP0572829A1/en
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Classifications

    • 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
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting

Definitions

  • the invention relates to a roller adjustment device with hydraulic adjustment cylinders of 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 for positioning the straightening rollers is and in the cylinder space of each adjusting cylinder two pistons which can be acted upon independently of one another and which carry out an overall stroke with a small working stroke and a large idle stroke are arranged.
  • a roll adjusting device for the adjustment of the rolls of a roll stand, which has two pistons which can be acted upon independently of one another in a positioning cylinder and which on the one hand allows the rolls to be widely separated with a large idle stroke and on the other hand to keep the working stroke of the rollers small in operation.
  • the invention has for its object to make a roller adjustment device of the type mentioned reliable, especially in the event of anomalies such as in the case of tilting movements of the upper crossbar of a straightening machine.
  • the lower piston executing the working stroke has an extension designed as an adjusting piston rod and the adjusting piston rods are supported on a hydraulic cushion by spherical bearings.
  • the adjusting cylinders misalignments are possible without the disadvantageous chatter marks of the self-locking spherical bearings, both with the small adjusting strokes by means of the lower piston and with working strokes of both pistons that add up to the total stroke.
  • the upper crossmember can be tilted transversely in the direction of sheet travel. If the positioning cylinders are advantageously connected to one another in terms of control technology via measuring sensors, parallel positioning can be achieved.
  • the spherical bearing consists of a pair of spherical spheres which lie against one another and which is arranged between a cover and a base plate facing the flat piston of the hydraulic cushion and extending upwards over the adjusting piston rod.
  • the adjusting piston rod is thus movably connected to the crossbar via a spherical suspension.
  • the pressure medium (oil) acting on the flat piston from below lifts the installation unit (flat piston, base plate, etc.) up to the stop position of the suspension so that the components lie against each other without play.
  • the hydraulic cushion / the flat piston is connected to an accumulator and a pressure measuring device and a controlled check valve are arranged in the accumulator line.
  • the controlled check valve opens and thus enables the spring forces to relax. Any leaks are compensated for by replenishing pressure medium from the accumulator.
  • the machine frame is formed by two stands 2, 3 anchored to the foundation, which are rigidly connected by an upper frame cross member 4a and a lower and upper crossbar 4, 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 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.
  • Roller positioning wedges 8 are mounted on the lower roller mill 7 and can be displaced by one pressure medium cylinder 9 each.
  • a bearing carrier wedge 11 for lower straightening rollers 12 and support rollers 13 associated therewith is supported on each wedge 8; webs 14 are arranged between the support rollers 13.
  • several upper straightening rollers 15 are supported on their bales, namely by means of support rollers 17, which are located between webs 16.
  • the upper straightening and support rollers 15, 17 are mounted on a bearing carrier wedge 18.
  • Each of the adjacent bearing bracket keys 18 is supported on a wedge 21, the other side of which rests on the upper roller mill 6.
  • the adjusting 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.
  • the adjusting cylinders 10 are formed with a divided total stroke, which is composed of an idle stroke 24 and a working stroke 25.
  • an upper piston 26 and a lower piston 27 are arranged in the cylinder space 34 of the positioning cylinder 10 for this purpose, which can be acted upon independently of one another.
  • the lower piston 27 executes the working stroke 25; it is extended downwards by an adjusting piston rod 28, which has a spherical bearing 29 at its lower end (cf. FIG. 2).
  • a cylinder cover 33 placed on the cylinder housing 31 and fastened with cylinder screws 32 arranged on a circle closes off the cylinder chamber 34 at the top.
  • a sealing plate 36 delimiting the pressure chamber 35 for the upper piston 26 is arranged below the cylinder cover 33. This serves at the same time for guiding supply pipes 37, 38 penetrating the cylinder cover 33, via which the pressure medium (oil) flows into the upper and lower pressure chambers 35 and 39, respectively.
  • the supply pipe 37 assigned to the upper or idle stroke pressure chamber 35 ends in the sealing plate 36, while the supply pipe 38 assigned to the lower or working stroke pressure chamber 39 dips into a through bore 41 of the upper piston 26.
  • the feed pipe 38 is of such a length that in the position of the upper piston 26 shown in FIG. 3, in which it rests against a lower fixed stop 42 in the form of an annular inner collar of the cylinder housing, it is at a distance corresponding to the path of the idle stroke 24 the mouth 43 of the through hole 41 ends.
  • the upper piston 26 is moved with excess force against the fixed stop 42, so that the oil column in the upper pressure chamber 35 is no longer subject to oil elasticity.
  • both feed pipes 37, 38 i.e. associated valves, not shown, are opened.
  • the pistons 26 and 27 can then move upward in the direction of arrow 44, the oil displaced from the pressure chambers 39 and 35 escaping via the feed lines 37, 38.
  • the adjusting piston rods 28 of the adjusting cylinders 10, which have the spherical bearing 29 at their lower ends, are - as shown in FIG. 2 - supported on a hydraulic cushion 45, which is formed under a flat piston 46 arranged in the crossbar 4.
  • the hydraulic cushion 45 is connected via an accumulator line 47 to an accumulator 48 which is preceded by a pressure measuring device 49 and a controlled check valve 51 in the accumulator line 47. Due to the support of the flat piston 46 via the hydraulic cushion 45, the transverse crossbeam 4 can be tilted relative to the adjusting piston rods 28 without these having a disadvantageous effect on a pair of spherical caps 54 consisting of two individual parts 52, 53 facing one another with spherical surfaces.
  • the pair of calottes 54 is arranged on a tie bolt 56, which is screwed into the adjusting piston rod 28 on the one hand and in the crossbar 4 on the other hand and is surrounded by a bush 55, between a cover 57 and a base plate 58 facing the flat piston 46 and extending upwards over the adjusting piston rod 28.
  • a split ring 59 screwed to the base plate 58 ultimately establishes the coupling to the crossbar 4.
  • the one on the pair of calottes 54 put on cover 57 is acted upon by a spring assembly 61, which acts on a nut 63 screwed onto the tension bolt 56 via a pressure ring 62.
  • the base plate 58 with the pair of caps 54 lifts up to the stop position of the spherical suspension against the cover 57 acted upon from the other side by the plate spring assembly 61.
  • the crossbar 4 can also be tilted.
  • the pair of calottes 54 is thus firmly clamped, although inclined positions of the crossbar with respect to the adjusting piston rods 28 are possible via the rounded surfaces lying against one another.
  • the check valve 51 opens so that the excess amount of pressure medium can flow out until the plate spring assemblies 61 are relaxed as far as they will go.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Crushing And Grinding (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

A roll adjustment device with hydraulic adjusting cylinders (10) of a levelling machine for sheets and strips, with upper and lower levelling rolls which are arranged offset to one another and are supported along their length by means of back-up rollers which, for their part, are supported on crossmembers (4, 5) and arranged in roll frames, at least the upper crossmember being adjustable for the purpose of positioning the levelling rolls, is designed so as to be more reliable in operation and variable as regards the adjusting travel by dividing up the total stroke of each adjusting cylinder (10). <IMAGE>

Description

Die Erfindung betrifft eine Walzenanstellvorrichtung mit hydraulischen Anstellzylindern 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 und im Zylinderraum eines jeden Anstellzylinders zwei unabhängig voneinander beaufschlagbare, einen Gesamthub mit einem kleinen Arbeitshub und einen großen Leerhub ausführende Kolben angeordnet sind.The invention relates to a roller adjustment device with hydraulic adjustment cylinders of 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 for positioning the straightening rollers is and in the cylinder space of each adjusting cylinder two pistons which can be acted upon independently of one another and which carry out an overall stroke with a small working stroke and a large idle stroke are arranged.

Durch die DE-A-37 00 555 ist eine Richtmaschine für Bleche und Bänder bekanntgeworden, bei der die Querhäupter durch vier Anstellvorrichtungen auf und ab anstellbar sind, um die Relativlage der oberen und unteren zueinander versetzten Richtwalzen quer zur Vorschubrichtung des Richtgutes zu beeinflussen. Damit werden zum Einstellen der Überstreckungsverteilung die Querhäupter und damit die Richtwalzen einlaufseitig auf einen größeren Überstreckungsbetrag eingestellt als auslaufseitig, d.h. die Querhäupter werden in Vorschubrichtung etwas divergierend angestellt.From DE-A-37 00 555 a straightening machine for sheets and strips has become known in which the crossheads can be adjusted up and down by four adjusting devices in order to influence the relative position of the upper and lower straightening rollers offset from one another transversely to the feed direction of the straightening material. In order to set the overstretching distribution, the crossheads and thus the straightening rollers are set to a larger overstretching amount on the inlet side than on the outlet side, i.e. the crossheads are set slightly diverging in the feed direction.

Aus der JP-A- 62-130705 (nächster Stand der Technik) ist für die Anstellung der Walzen eines Walzgerüstes eine Walzenanstellvorrichtung bekannt, die in einem Anstellzylinder zwei unabhängig voneinander beaufschlagbare Kolben aufweist und es erlaubt, einerseits die Walzen mit einem großen Leerhub weit auseinanderzufahren und andererseits den Arbeitshub bei den Walzen im Betrieb klein zu halten.From JP-A-62-130705 (closest prior art) a roll adjusting device is known for the adjustment of the rolls of a roll stand, which has two pistons which can be acted upon independently of one another in a positioning cylinder and which on the one hand allows the rolls to be widely separated with a large idle stroke and on the other hand to keep the working stroke of the rollers small in operation.

Damit sich in ein und derselben Richtmaschine größere Anstellbereiche bewältigen lassen, sind zur Hubvergrößerung mechanische Überlagerungen bekannt; z.B. werden bei Anstellvorrichtungen mit Gewindespindeln zusätzliche Distanzstücke eingeschwenkt, oder es wird sogar die Maschine insgesamt aus dem Arbeitsbereich herausgefahren. Diese Maßnahmen sind sehr umständlich und erfordern einen großen Zeitaufwand. Obwohl bei hydraulischen Anstellvorrichtungen ein großer Arbeitshub wünschenswert ist, wird er dennoch so klein wie möglich gehalten, um eine ansonsten indifferente Regelung zu vermeiden, da nämlich die Anstellung ansonsten zu elastisch und damit regeltechnisch nicht mehr betreibbar wäre. Schließlich läßt sich bei den sich auf Kalotten abstützenden und damit selbsthemmenden Anstellspindeln unter Last ein Gleiten bzw. eine Reibung nicht verhindern, so daß trotz der Kalottenlagerung dennoch Rattermarken nicht zu verhindern sind, die die Kalottenlagerung zerstören können.So that larger adjustment ranges can be managed in one and the same straightening machine, the stroke is increased mechanical overlays known; For example, in the case of adjusting devices with threaded spindles, additional spacers are swiveled in, or the machine as a whole is even moved out of the working area. These measures are very cumbersome and require a great deal of time. Although a large working stroke is desirable in hydraulic adjustment devices, it is nevertheless kept as small as possible in order to avoid an otherwise indifferent control, since the adjustment would otherwise be too elastic and therefore no longer operable in terms of control technology. Finally, sliding or friction cannot be prevented in the case of the supporting spindles, which are supported on the spherical cap and thus self-locking, so that despite the spherical cap bearing arrangement, chatter marks which can destroy the spherical cap bearing arrangement cannot be prevented.

Der Erfindung liegt die Aufgabe zugrunde, eine Walzenanstellvorrichtung der eingangs genannten Art betriebssicherer zu gestalten, insbesondere bei auftretenden Schieflagen wie vor allem im Falle von Kippbewegungen der oberen Quertraverse einer Richtmaschine.The invention has for its object to make a roller adjustment device of the type mentioned reliable, especially in the event of anomalies such as in the case of tilting movements of the upper crossbar of a straightening machine.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der den Arbeitshub ausführende untere Kolben eine als Anstellkolbenstange ausgebildete Verlängerung aufweist und die Anstellkolbenstangen über Kalottenlagerungen auf einem hydraulischen Kissen abgestützt sind. Bei den Anstellzylindern sind damit Schieflagen ohne die nachteiligen Rattermarken der selbsthemmenden Kalottenlagerungen möglich, und zwar sowohl bei den kleinen Anstellhüben mittels des unteren Kolbens als auch bei sich zu dem Gesamthub addierenden Arbeitshüben beider Kolben. Im Rahmen des Führungsspiels eines Flachkolbens des hydraulischen Kissens läßt sich die obere Quertraverse in Blechlaufrichtung quer kippen. Wenn vorteilhaft die Anstellzylinder über Meßwertgeber regeltechnisch miteinander verbunden sind, läßt sich ein paralleles Anstellen erreichen.This object is achieved in that the lower piston executing the working stroke has an extension designed as an adjusting piston rod and the adjusting piston rods are supported on a hydraulic cushion by spherical bearings. In the case of the adjusting cylinders, misalignments are possible without the disadvantageous chatter marks of the self-locking spherical bearings, both with the small adjusting strokes by means of the lower piston and with working strokes of both pistons that add up to the total stroke. As part of the guiding game of a flat piston of the hydraulic cushion, the upper crossmember can be tilted transversely in the direction of sheet travel. If the positioning cylinders are advantageously connected to one another in terms of control technology via measuring sensors, parallel positioning can be achieved.

Vorteilhaft besteht die Kalottenlagerung aus einem mit sphärischen Flächen einander anliegenden Kalottenpaar, das zwischen einem Deckel und einer einem Flachkolben des hydraulischen Kissens zugewandten, nach oben hin die Anstellkolbenstange übergreifenden Fußplatte angeordnet ist. Die Anstellkolbenstange ist somit über eine sphärische Aufhängung beweglich mit der Quertraverse verbunden. Das von unten den Flachkolben beaufschlagende Druckmedium (Öl) hebt die Einbaueinheit (Flachkolben, Fußplatte, etc.) bis zur Anschlaglage der Aufhängung an, so daß die Bauteile ohne Spiel aneinanderliegen.Advantageously, the spherical bearing consists of a pair of spherical spheres which lie against one another and which is arranged between a cover and a base plate facing the flat piston of the hydraulic cushion and extending upwards over the adjusting piston rod. The adjusting piston rod is thus movably connected to the crossbar via a spherical suspension. The pressure medium (oil) acting on the flat piston from below lifts the installation unit (flat piston, base plate, etc.) up to the stop position of the suspension so that the components lie against each other without play.

Es empfiehlt sich, ein den Deckel beaufschlagendes, vorteilhaft zwischen einem Druckring und dem Deckel angeordnetes, auf die sphärische Aufhängung einwirkendes Federpaket vorzusehen. Damit läßt sich eine Abfederung von leichten Rückprallkräften erreichen, die beim Bandaustritt auftreten.It is advisable to provide a spring assembly which acts on the cover and is advantageously arranged between a pressure ring and the cover and acts on the spherical suspension. In this way, a cushioning of light rebound forces that occur when the belt exits can be achieved.

Es wird vorgeschlagen, daß das hydraulische Kissen/ der Flachkolben an einen Akkumulator angeschlossen ist und in der Akkumulatorleitung eine Druckmeßeinrichtung und ein gesteuertes Rückschlagventil angeordnet sind. Bei aufgrund von Rückprallkräften auftretenden Druckspitzen geht das gesteuerte Rückschlagventil auf und ermöglicht somit eine Entspannung der Federkräfte. Etwaige Leckagen werden durch Nachspeisung von Druckmittel aus dem Akkumulator ausgeglichen.It is proposed that the hydraulic cushion / the flat piston is connected to an accumulator and a pressure measuring device and a controlled check valve are arranged in the accumulator line. When pressure peaks occur due to rebound forces, the controlled check valve opens and thus enables the spring forces to relax. Any leaks are compensated for by replenishing pressure medium from the accumulator.

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

Figur 1
eine erfindungsgemäße Rollenrichtmaschine im Querschnitt dargestellt;
Figur 2
einen erfindungsgemäßen Anstellzylinder im Querschnitt und vergrößert dargestellt; und
Figur 3
als Einzelheit die Kolbenanordnung des Anstellzylinders gemäß Fig. 2 im Teilschnitt.
The invention is explained 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;
Figure 2
a pitch cylinder according to the invention shown in cross section and enlarged; and
Figure 3
as a detail the piston arrangement of the adjusting cylinder according to FIG. 2 in partial section.

Bei der Rollenrichtmaschine 1 wird der Maschinenrahmen durch zwei am Fundament verankerte Ständer 2, 3 gebildet, die durch eine obere Rahmentraverse 4a und eine untere und obere Quertraverse 4, 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 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 roller leveler 1, the machine frame is formed by two stands 2, 3 anchored to the foundation, which are rigidly connected by an upper frame cross member 4a and a lower and upper crossbar 4, 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 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 Rollenanstellkeile 8 gelagert, die durch je einen Druckmittelzylinder 9 verschiebbar sind. Auf jedem Anstellkeil 8 ist ein Lagerträgerkeil 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 an ihren Ballen abgestützt, und zwar mittels Stützrollen 17, die sich zwischen Stegen 16 befinden. Die oberen Richt- und Stützrollen 15, 17 sind an einem Lagerträgerkeil 18 gelagert. Jeder der benachbarten Lagerträgerkeile 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.Roller positioning wedges 8 are mounted on the lower roller mill 7 and can be displaced by one pressure medium cylinder 9 each. A bearing carrier wedge 11 for lower straightening rollers 12 and support rollers 13 associated therewith is supported on each wedge 8; webs 14 are arranged between the support rollers 13. Furthermore, several upper straightening rollers 15 are supported on their bales, namely by means of support rollers 17, which are located between webs 16. The upper straightening and support rollers 15, 17 are mounted on a bearing carrier wedge 18. Each of the adjacent bearing bracket keys 18 is supported on a wedge 21, the other side of which rests on the upper roller mill 6. The adjusting 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.

Die Anstellzylinder 10 sind mit einem aufgeteilten Gesamthub ausgebildet, der sich aus einem Leerhub 24 und einem Arbeitshub 25 zusammensetzt. Wie in den Fig. 2 und 3 dargestellt wird, sind zu diesem Zweck im Zylinderraum 34 des Anstellzylinders 10 ein oberer Kolben 26 und ein unterer Kolben 27 angeordnet, die unabhängig voneinander beaufschlagbar sind. Der untere Kolben 27 führt den Arbeitshub 25 aus; er ist durch eine Anstellkolbenstange 28 nach unten hin verlängert, die an ihrem unteren Ende eine Kalottenlagerung 29 aufweist (vgl. Fig. 2). Ein auf das Zylindergehäuse 31 aufgesetzter und mit auf einem Kreis angeordneten Zylinderschrauben 32 befestigter Zylinderdeckel 33 schließt den Zylinderraum 34 nach oben ab. Unterhalb des Zylinderdeckels 33 ist eine den Druckraum 35 für den oberen Kolben 26 begrenzende Dichtplatte 36 angeordnet. Diese dient gleichzeitig zur Führung von den Zylinderdeckel 33 durchdringenden Zuleitungsrohren 37, 38, über die das Druckmittel (Öl) in den oberen bzw. unteren Druckraun 35 bzw. 39 einströmt.The adjusting cylinders 10 are formed with a divided total stroke, which is composed of an idle stroke 24 and a working stroke 25. As shown in FIGS. 2 and 3, an upper piston 26 and a lower piston 27 are arranged in the cylinder space 34 of the positioning cylinder 10 for this purpose, which can be acted upon independently of one another. The lower piston 27 executes the working stroke 25; it is extended downwards by an adjusting piston rod 28, which has a spherical bearing 29 at its lower end (cf. FIG. 2). A cylinder cover 33 placed on the cylinder housing 31 and fastened with cylinder screws 32 arranged on a circle closes off the cylinder chamber 34 at the top. A sealing plate 36 delimiting the pressure chamber 35 for the upper piston 26 is arranged below the cylinder cover 33. This serves at the same time for guiding supply pipes 37, 38 penetrating the cylinder cover 33, via which the pressure medium (oil) flows into the upper and lower pressure chambers 35 and 39, respectively.

Das dem oberen bzw. Leerhub-Druckraum 35 zugeordnete Zuleitungsrohr 37 endet in der Dichtplatte 36, während das dem unteren bzw. Arbeitshub-Druckraum 39 zugeordnete Zuleitungsrohr 38 in eine Durchgangsbohrung 41 des oberen Kolbens 26 eintaucht. Das Zuleitungsrohr 38 ist von einer solchen Länge, daß es in der in Fig. 3 dargestellten Position des oberen Kolbens 26, in der dieser einem unteren Festanschlag 42 in Form eines ringartigen Innenkragens des Zylindergehäuses anliegt, in einem dem Weg des Leerhubs 24 entsprechenden Abstand über der Mündung 43 der Durchgangsbohrung 41 endet. Der obere Kolben 26 wird mit Kraftüberschuß gegen den Festanschlag 42 gefahren, so daß die in dem oberen Druckraum 35 anstehende Ölsäule keiner Ölelastizität mehr unterliegt.The supply pipe 37 assigned to the upper or idle stroke pressure chamber 35 ends in the sealing plate 36, while the supply pipe 38 assigned to the lower or working stroke pressure chamber 39 dips into a through bore 41 of the upper piston 26. The feed pipe 38 is of such a length that in the position of the upper piston 26 shown in FIG. 3, in which it rests against a lower fixed stop 42 in the form of an annular inner collar of the cylinder housing, it is at a distance corresponding to the path of the idle stroke 24 the mouth 43 of the through hole 41 ends. The upper piston 26 is moved with excess force against the fixed stop 42, so that the oil column in the upper pressure chamber 35 is no longer subject to oil elasticity.

Aufgrund des unterteilten, sich aus dem Leerhub 24 und dem demgegenüber kleineren Arbeitshub 25 zusammensetzenden Gesamthubes des Anstellzylinders 10 wird trotz eines somit sehr großen Auffahrweges dennoch der Arbeitshub 25 regeltechnisch günstig klein gehalten. Soll der Walzspalt über den Arbeitshub 25 hinaus vergrößert werden, müssen beide Zuleitungsrohre 37, 38, d.h. diesen zugeordnete, nicht dargestellte Ventile aufgesteuert werden. Die Kolben 26 bzw. 27 können sich dann in Pfeilrichtung 44 nach oben bewegen, wobei das aus den Druckräumen 39 bzw. 35 verdrängte Öl über die Zuleitungen 37, 38 entweicht.Because of the subdivided total stroke of the actuating cylinder 10, which is composed of the idle stroke 24 and the smaller working stroke 25, the working stroke 25 is nevertheless kept small in terms of control technology despite a very large drive-up path. If the roll gap is to be enlarged beyond the working stroke 25, both feed pipes 37, 38, i.e. associated valves, not shown, are opened. The pistons 26 and 27 can then move upward in the direction of arrow 44, the oil displaced from the pressure chambers 39 and 35 escaping via the feed lines 37, 38.

Die an ihren unteren Enden die Kalottenlagerung 29 aufweisenden Anstellkolbenstangen 28 der Anstellzylinder 10 sind - wie in Fig. 2 dargestellt - auf einem hydraulischen Kissen 45 abgestützt, das sich unter einem in der Quertraverse 4 angeordneten Flachkolben 46 ausbildet. Das hydraulische Kissen 45 ist über eine Akkumulatorleitung 47 mit einem Akkumulator 48 verbunden, dem in der Akkumulatorleitung 47 eine Druckmeßeinrichtung 49 und ein gesteuertes Rückschlagventil 51 vorgeschaltet sind. Aufgrund der Abstützung des Flachkolbens 46 über das hydraulische Kissen 45 werden Schieflagen der Quertraverse 4 gegenüber den Anstellkolbenstangen 28 ermöglicht, ohne daß sich diese nachteilig auf ein aus zwei einander mit sphärischen Flächen zugewandten Einzelteilen 52, 53 bestehendes Kalottenpaar 54 auswirken.The adjusting piston rods 28 of the adjusting cylinders 10, which have the spherical bearing 29 at their lower ends, are - as shown in FIG. 2 - supported on a hydraulic cushion 45, which is formed under a flat piston 46 arranged in the crossbar 4. The hydraulic cushion 45 is connected via an accumulator line 47 to an accumulator 48 which is preceded by a pressure measuring device 49 and a controlled check valve 51 in the accumulator line 47. Due to the support of the flat piston 46 via the hydraulic cushion 45, the transverse crossbeam 4 can be tilted relative to the adjusting piston rods 28 without these having a disadvantageous effect on a pair of spherical caps 54 consisting of two individual parts 52, 53 facing one another with spherical surfaces.

Das Kalottenpaar 54 ist auf einem einerseits in der Anstellkolenstange 28 und andererseits in der Quertraverse 4 eingeschraubten, von einer Büchse 55 umschlossenen Zugbolzen 56 zwischen einem Deckel 57 und einer dem Flachkolben 46 zugewandten, nach oben hin die Anstellkolbenstange 28 übergreifenden Fußplatte 58 angeordnet. Ein mit der Fußplatte 58 verschraubter, geteilter Ring 59 stellt letztendlich die Kopplung zur Quertraverse 4 her. Der auf das Kalottenpaar 54 aufgesetzte Deckel 57 wird von einem Federpaket 61 beaufschlagt, auf das über einen Druckring 62 eine auf den Zugbolzen 56 aufgeschraubte Mutter 63 einwirkt. Sobald Öl in den Druckraum unter dem Flachkolben 46 einströmt und damit das hydraulische Kissen 45 aufbaut, hebt sich die Fußplatte 58 mit dem Kalottenpaar 54 bis zur Anschlaglage der sphärischen Aufhängung gegen den von der anderen Seite her von dem Tellerfederpaket 61 beaufschlagten Deckel 57 an. Im Rahmen des Kolbenspiels des Flachkolbens 46 ist auch ein Kippen der Quertraverse 4 möglich. Das Kalottenpaar 54 ist somit fest eingespannt, wobei allerdings Schieflagen der Quertraverse gegenüber den Anstellkolbenstangen 28 über die einander anliegenden gerundeten Flächen möglich sind. Sobald ein bestimmter Druck des hydraulischen Kissens 45 überschritten wird, öffnet das Rückschlagventil 51, so daß die überschüssige Druckmittelmenge abströmen kann, bis die Tellerfederpakete 61 bis zum Anschlag entspannt sind.The pair of calottes 54 is arranged on a tie bolt 56, which is screwed into the adjusting piston rod 28 on the one hand and in the crossbar 4 on the other hand and is surrounded by a bush 55, between a cover 57 and a base plate 58 facing the flat piston 46 and extending upwards over the adjusting piston rod 28. A split ring 59 screwed to the base plate 58 ultimately establishes the coupling to the crossbar 4. The one on the pair of calottes 54 put on cover 57 is acted upon by a spring assembly 61, which acts on a nut 63 screwed onto the tension bolt 56 via a pressure ring 62. As soon as oil flows into the pressure chamber under the flat piston 46 and thus builds up the hydraulic cushion 45, the base plate 58 with the pair of caps 54 lifts up to the stop position of the spherical suspension against the cover 57 acted upon from the other side by the plate spring assembly 61. Within the scope of the piston play of the flat piston 46, the crossbar 4 can also be tilted. The pair of calottes 54 is thus firmly clamped, although inclined positions of the crossbar with respect to the adjusting piston rods 28 are possible via the rounded surfaces lying against one another. As soon as a certain pressure of the hydraulic cushion 45 is exceeded, the check valve 51 opens so that the excess amount of pressure medium can flow out until the plate spring assemblies 61 are relaxed as far as they will go.

BezugszeichenlisteReference list

11
RollenrichtmaschineRoller straightener
22nd
StänderStand
33rd
StänderStand
44th
QuertraverseCrossbar
4a4a
RahmentraverseFrame cross member
55
QuertraverseCrossbar
66
WalzenstuhlRoller mill
77
WalzenstuhlRoller mill
88th
AnstellkeilWedge
99
DruckmittelzylinderPressure cylinder
1010th
AnstellzylinderPitch cylinder
1111
LagerträgerkeilBearing bracket wedge
1212th
untere Richtrollelower straightening roll
1313
StützrolleSupport roller
1414
StützlagerSupport bearing
1515
obere Richtrolleupper straightening roll
1616
StützlagerSupport bearing
1717th
StützrolleSupport roller
1818th
LagerträgerBearing bracket
1919th
2020th
2121
AnstellkeilWedge
2222
DruckmittelzylinderPressure cylinder
2323
GelenkwellePTO shaft
2424th
LeerhubIdle stroke
2525th
ArbeitshubWorking stroke
2626
oberer Kolbenupper piston
2727
unterer Kolbenlower piston
2828
AnstellkolbenstangeStarting piston rod
2929
KalottenlagerungSpherical bearing
3030th
3131
ZylindergehäuseCylinder housing
3232
Zylinderschraubecylinder head screw
3333
ZylinderdeckelCylinder cover
3434
ZylinderraumCylinder space
3535
DruckraumPressure room
3636
DichtplatteSealing plate
3737
ZuleitungsrohrSupply pipe
3838
ZuleitungsrohrSupply pipe
3939
DruckraumPressure room
4040
4141
DurchgangsbohrungThrough hole
4242
FestanschlagFixed stop
4343
Mündungmuzzle
4444
Pfeilarrow
4545
hydraulisches Kissenhydraulic cushion
4646
FlachkolbenFlat bottom flask
4747
AkkumulatorleitungAccumulator line
4848
Akkumulatoraccumulator
4949
DruckmeßeinrichtungPressure measuring device
5050
5151
Rückschlagventilcheck valve
5252
EinzelteilItem
5353
EinzelteilItem
5454
KalottenpaarDome pair
5555
BuchseRifle
5656
ZugbolzenDraw bolt
5757
Deckelcover
5858
FußplatteFootplate
5959
Ringring
6060
6161
FederpaketSpring pack
6262
DruckringPressure ring
6363
Muttermother

Claims (8)

  1. Roll adjusting device with hydraulic adjusting cylinders (10) of a straightening machine for sheets and strips with upper and lower straightening rolls (12, 15), which are arranged offset relative to one another and supported over their length by means of support rolls (13, 17), which are in turn supported at crossbeams (4, 5) and arranged in roll frames (6, 7), wherein at least the upper crossbeam (4) is adjustable for positioning the straightening rolls and two pistons (26, 27), which are loadable independently of one another and execute a total stroke with a small working stroke and a large idle stroke, are arranged in the cylinder chamber (34) of one of each adjusting cylinder (10), characterised in that the lower piston (27) executing the working stroke (25) has a prolongation formed as an adjusting piston rod (28) and the adjusting piston rods (28) are supported on a hydraulic pad (45) by way of cup bearings (29).
  2. Roll adjusting device according to claim 1, characterised thereby that the cup bearing (29) comprises a cup pair (54), the individual parts (52, 53) of which contact each other by spherical surfaces and which is arranged between a cover (57) and a foot plate (58), which faces a flat-topped piston (46) of the hydraulic pad (45) and engages from above over the adjusting piston rod (28).
  3. Roll adjusting device according to claim 1 or 2, characterised thereby that the foot plate (58) is connected with the crossbeam (4) by way of a divided ring (59).
  4. Roll adjusting device according to one of claims 1 to 3, characterised by a spring packet (61) loading the cover (57).
  5. Roll adjusting device according to claim 4, characterised thereby that the spring packet (61) is arranged between a pressure ring (62) and the cover (57).
  6. Roll adjusting device according to one of claims 1 to 5, characterised thereby that the hydraulic pad (45) is connected to an accumulator (48), and a pressure measuring device (49) and a controlled non-return valve (51) are arranged in the accumulator duct (47).
  7. Roll adjusting device according to one of claims 1 to 6, characterised thereby that the adjusting cylinders (10) are connected together by way of measurement value transmitters in the manner of regulating technology.
  8. Roll adjusting device according to claims 1 to 7, characterised thereby that the upper crossbeam (4) is tiltable transversely, as seen in sheet running direction, within the scope of the guidance play of the flat-topped piston (46).
EP93107709A 1992-06-02 1993-05-12 Roll adjustment device Expired - Lifetime EP0572829B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4218138 1992-06-02
DE4218138A DE4218138A1 (en) 1992-06-02 1992-06-02 Roller adjustment device

Publications (2)

Publication Number Publication Date
EP0572829A1 EP0572829A1 (en) 1993-12-08
EP0572829B1 true EP0572829B1 (en) 1996-08-14

Family

ID=6460207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107709A Expired - Lifetime EP0572829B1 (en) 1992-06-02 1993-05-12 Roll adjustment device

Country Status (4)

Country Link
EP (1) EP0572829B1 (en)
AT (1) ATE141194T1 (en)
DE (2) DE4218138A1 (en)
ES (1) ES2091519T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111451284A (en) * 2020-04-22 2020-07-28 山东钢铁集团日照有限公司 Method for improving hydraulic balance loop of hot rolling finishing mill back-up roll balance system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103008400A (en) * 2012-12-03 2013-04-03 太原重工股份有限公司 Telescopic rotating hydraulic device and hydraulic locking device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285972B (en) * 1966-05-27 1969-01-02 Neumann Ohg Straightening roller drive for sheet metal straightening machines
GB1216546A (en) * 1968-02-09 1970-12-23 Paterson Candy Internat Ltd Three-position ram
DE3700555A1 (en) * 1987-01-10 1988-07-21 Schloemann Siemag Ag LEVELING MACHINE FOR SHEETS AND TAPES
DE3939124A1 (en) * 1989-11-25 1991-05-29 Sundwiger Eisen Maschinen MULTI-ROLLER ROD WITH HYDRAULIC EMPLOYMENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111451284A (en) * 2020-04-22 2020-07-28 山东钢铁集团日照有限公司 Method for improving hydraulic balance loop of hot rolling finishing mill back-up roll balance system

Also Published As

Publication number Publication date
ES2091519T3 (en) 1996-11-01
DE4218138A1 (en) 1993-12-09
ATE141194T1 (en) 1996-08-15
EP0572829A1 (en) 1993-12-08
DE59303409D1 (en) 1996-09-19

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