EP0029422B1 - Device for locating rollers with an increased rotary resistance in a roller way - Google Patents

Device for locating rollers with an increased rotary resistance in a roller way Download PDF

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Publication number
EP0029422B1
EP0029422B1 EP80890106A EP80890106A EP0029422B1 EP 0029422 B1 EP0029422 B1 EP 0029422B1 EP 80890106 A EP80890106 A EP 80890106A EP 80890106 A EP80890106 A EP 80890106A EP 0029422 B1 EP0029422 B1 EP 0029422B1
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EP
European Patent Office
Prior art keywords
supporting body
rollers
arrangement according
frictional
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80890106A
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German (de)
French (fr)
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EP0029422A1 (en
EP0029422B2 (en
Inventor
Werner Scheurecker
Josef Wirth
Reinhold Dr. Angerer
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Primetals Technologies Austria GmbH
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Voestalpine AG
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Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0029422A1 publication Critical patent/EP0029422A1/en
Publication of EP0029422B1 publication Critical patent/EP0029422B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls

Definitions

  • the invention relates to a device for locating rolls with increased rotational resistance in a roll, in particular strand guide rolls in a continuous casting installation.
  • the strand is guided and cooled between two opposite roller conveyors after leaving the continuous mold, u. between at least a distance which corresponds to the length of the liquid sump of the strand.
  • the rollers of these roller conveyors have relatively small diameters and are arranged as closely as possible adjacent to one another. The rollers are held or surrounded by a frame construction. Because of the compact construction of the rollers and frame construction, the rollers are difficult to access from the outside.
  • the roller bearings may fail, so that individual rollers of the roller conveyor get stuck or are difficult to turn. This is not only disadvantageous for the strand quality, but also represents a danger for the entire system, since the strand grinds along the stuck rolls, which can tear open the still thin strand shell and thus lead to a strand breakthrough.
  • the object of the present invention is to be able to determine stuck roles as early as possible. This should be possible without a long shutdown. In particular, it should be possible to determine stuck rollers without dismantling components of the roller conveyor.
  • a support body which is movable along the roller conveyor and carries a reaming head, which reaming head can be pressed onto the lateral surface of successive rollers, a device for registering or measuring a difference in the speed of the support body at which it is moved along the roller conveyor , and the speed of the part of the reaming head coming into contact with a roller is provided.
  • the support body can be coupled to the start-up line and moved with the start-up line between the roller conveyors, which is a routine task in continuous casting systems which takes up only a very short time.
  • the support body advantageously has at least one surface that is in contact with the rollers of a roller conveyor and the friction head is resiliently mounted on the support body, wherein upon contact with a roller it can be moved from a position protruding beyond the surface to a position in alignment with the surface.
  • the friction head is designed as a friction wheel, the circumference of the friction wheel being able to be pressed against the outer surface of a roller, and a device indicating a rotational movement of the friction wheel is provided.
  • the friction wheel is expediently mounted on a swivel arm mounted on the support body, the swivel axis of the swivel arm being directed parallel to the axis of the friction wheel and the swivel arm being movable by means of a spring device against a stop limiting its movement against the rollers.
  • the friction wheel is slidably mounted along a guide and can be pressed by means of a spring device against a stop limiting its movement against the rollers.
  • the friction wheel serves as a drive for a cam disk, the cams of which trigger signals when they rotate, preferably close an electrical contact.
  • the friction wheel can also be expediently connected to a tachometer generator.
  • the reaming head is designed as a piston, which can be pressed against the outer surface of a roller at approximately a right angle to the roller conveyor and is displaceably mounted on guides on the carrier body in the direction of movement of the carrier body, with a device for registering or measuring a relative movement of the piston is provided relative to the support body in the direction of movement of the support body.
  • the piston is expediently mounted on a carriage which can be displaced in the direction of movement of the support body and which can preferably be displaced by means of longitudinal guides on rollers provided on the support body, with position indicators on the carriage and on the support body for registering a relative movement between the carriage and the support body, such as a magnetic coil with iron core or electrical contacts are provided.
  • the surface of the support body which is in contact with the roller conveyor is preferably formed by an elastically deformable steel strip.
  • FIG. 1 shows a side view of an inventive device according to a first embodiment
  • FIG. 2 shows a section along the line 11-11 of FIG. 1
  • FIG. 3 shows a detail of FIG 1 on an enlarged scale
  • FIG. 4 shows a section along the line IV-IV of FIG. 3 according to this embodiment.
  • FIG. 5 shows a representation analogous to FIG. 4.
  • FIG. 6 shows a third embodiment in a section perpendicular to the roller axes of the roller conveyors.
  • FIG. 7 shows a section along line VII-VII of FIG. 6,
  • FIG. 8 shows a section along line VIII-VIII of FIG Fig. 7 is performed.
  • the device 4 for locating stuck rollers is inserted between roller conveyors 1 and 2, the rollers of which are designated 3, a strand guide of a continuous casting installation. It is connected to a cold strand 6 by means of a coupling 5.
  • the device has a support body 7, which is formed by two elastically deformable steel strips 8, 8 'located opposite one another, which are pressed apart by spring pots 9, 9' located one behind the other. As a result, the steel strips 8, 8 'come into contact with the rollers 3 of the roller tracks 1 and 2. When pulling or pushing through the support body 7, the rollers 3 that have not got stuck are set in rotation.
  • hydraulically or pneumatically actuated pistons which press the steel strips 8, 8' apart, could also be provided.
  • the support body 7 is articulated to the coupling 5 via a linkage 10 and laterally arranged longitudinal cross members 11.
  • a bracket 12 is riveted to one of the steel strips 8, to which a swivel arm 13 is articulated, the swivel axis 14 being parallel to the axes 15 of the rollers 3 of the strand guideways.
  • the swivel arm is always moved by means of a spring 16 in the direction of arrow 16 ', that is to say towards the roller tracks.
  • a stop 17 for the swivel arm 13 ensures that the swivel arm is not pressed too far against the rollers 3.
  • a friction head designed as a friction wheel 18 is rotatably mounted at the free end of the swivel arm 13.
  • the axis 19, about which the friction wheel 18 is rotatable, is directed parallel to the pivot axis 14 of the pivot arm.
  • a cam disk 20 is fastened coaxially to the friction wheel 18, the cams 21 of which close an electrical contact 22 when the friction wheel 18 rotates.
  • the function of the device is as follows:
  • the steel belts 8, 8 'spread by the spring pots 9, 9' come into contact with the rollers 3 of the roller conveyors 1, 2, after overcoming the bearing play of the rollers 3, provided that they are not stuck through them
  • Pulling the device 4 between the roller tracks 1, 2 are rotated.
  • the roller circumferential speed corresponds to the transport speed of the carrier body 7.
  • the friction wheel 18 pressed resiliently against the rollers 3, provided the rollers rotate, does not make any relative movement with respect to the carrier body 7 when the rollers come into contact, since the circumference of the friction wheel 18 corresponds to the transport speed of the Carrier body 7 is moved past the rollers 3.
  • the friction wheel 18 is simply pushed back from its position projecting beyond the steel belt 8 until the circumference of the friction wheel 18 is aligned with the steel belt 8, which is in contact with the outer surfaces of the rollers 3. If the friction wheel comes into contact with a stuck or only difficult to rotate roller 3 - with such a roller there is a sliding movement between the contact surface 23 of the steel strip 8 and the surface of the roller - the friction wheel 18 is rotated and the electrical contact 22 closed.
  • the closing of the electrical contact is used to send a signal to a registration device, which is accommodated, for example, in a box 24 mounted on the device 4.
  • the recording device for example, at a stationary control station, independently of the support body 7.
  • the recording device If, in addition to each signal, the recording device also detects the respective position of the supporting body within the roller tracks, the position of the stuck rollers can be determined immediately.
  • the position of a stuck roller can be recorded in connection with an axially movable stylus 25 protruding over the steel band, which is depressed by each strand guide roller 3, which it moves past, thereby triggering a signal.
  • Signals can be triggered by the electrical contact or in another way, for example pneumatically.
  • the device 4 is turned through 180 ° about its longitudinal axis and moved again between the roller conveyors. It is also possible to provide a friction wheel 18 on both steel belts 8, 8 ', so that it is possible to locate stuck rollers on both roller tracks 1, 2 in one operation.
  • the friction wheel 18 can be displaced along a guide 26 directed perpendicular to the contact surface 23 of the steel strip 8.
  • the guide is designed as a piston which slides on a cylinder 27 fastened to the steel strip 8.
  • a spring 28 serves to press the friction wheel 18 against the strand guide rollers, a stop 17 likewise limiting the movement against the rollers 3.
  • a rotational movement of the friction wheel 18 is transmitted to a tachometer generator 29, which emits a signal corresponding to the rotational movement of the friction wheel to a recording device.
  • the vertical movement of the friction wheel 18 together with the housing and piston 26, which takes place every time the device is pressed down by a strand guide roller, can be done in the same way as the movement of an axially movable stylus 25 in the form of an output signal for registering the position of the respective roller be used.
  • the reaming head is designed as a piston 30, which is displaceably mounted approximately perpendicular to the contact surface 23 of the steel strip 8 and is pressed outwards beyond the contact surface 23 by a spring 31.
  • the piston 30 is mounted on a carriage 33 which can be displaced in the direction of movement of the support body 7, which direction is marked by the double arrow 32.
  • the carriage 33 has longitudinal guides 34 which are in contact with rollers 35 arranged on the support body 7. To indicate a relative movement of the piston 30 relative to the support body 7 in the direction of movement of the support body - such a relative movement occurs when the piston comes into contact with a stuck or difficult to rotate roller 3 - an inductive displacement sensor 36 is provided, as shown in Fig.
  • an iron core 37 mounted in the carriage 33 is immersed in a magnetic coil 38 which is fastened to the support body 7.
  • a displacement sensor designed as an electrical contact 39 could also be provided, as is shown on the right in FIG. 6.
  • the carriage 33 is, as long as the piston 30 does not perform a relative movement with respect to the support body 7 in the longitudinal direction of the support body by means of a roller 3 which has remained stuck, by means of two springs 40, each of which is fixed against the carriage 33 or against brackets 41 which are fastened to the steel belt 8 are, support, held in the middle position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)
  • Control Of Conveyors (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Continuous Casting (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)

Description

Die Erfindung betrifft eine Einrichtung zum Orten von Rollen mit einem erhöhten Drehwiderstand in einer Rollen, insbesondere von Strangführungsrollen in einer Stranggiessanlage.The invention relates to a device for locating rolls with increased rotational resistance in a roll, in particular strand guide rolls in a continuous casting installation.

Bei Stranggiessanlagen wird der Strang nach Verlassen der Durchlaufkokille zwischen zwei einander gegenüberliegenden Rollenbahnen geführt und gekühlt, u. zw. mindestens über eine Wegstrecke, die der Länge des flüssigen Sumpfes des Stranges entspricht. Die Rollen dieser Rollenbahnen weisen, um ein Ausbauchen des Stranges wirkungsvoll zu verhindern, relativ kleine Durchmesser auf und sind möglichst eng benachbart angeordnet. Die Rollen sind von einer Rahmenkonstruktion gehalten bzw. umgeben. Wegen der gedrängten Bauweise der Rollen und Rahmenkonstruktion sind die Rollen von aussen nur schwer zugänglich.In continuous casting plants, the strand is guided and cooled between two opposite roller conveyors after leaving the continuous mold, u. between at least a distance which corresponds to the length of the liquid sump of the strand. In order to effectively prevent the strand from bulging, the rollers of these roller conveyors have relatively small diameters and are arranged as closely as possible adjacent to one another. The rollers are held or surrounded by a frame construction. Because of the compact construction of the rollers and frame construction, the rollers are difficult to access from the outside.

Durch die hohe Temperaturbelastung der Rollen durch den glühenden, einen flüssigen kern aufweisenden Strang sowie durch das Kühlwasser kann es zu einem Versagen der Rollenlager kommen, so dass einzelne Rollen der Rollenbahnen steckenbleiben bzw. sich nur mehr schwer drehen lassen. Dies ist nicht nur für die Strangqualität nachteilig, sondern stellt auch eine Gefahr für die gesamte Anlage dar, da der Strang entlang der steckengebliebenen Rollen schleift, wodurch es zu einem Aufreissen der noch dünnen Strangschale und damit zu einem Strangdurchbruch kommen kann.Due to the high temperature load of the rollers due to the glowing strand with a liquid core and the cooling water, the roller bearings may fail, so that individual rollers of the roller conveyor get stuck or are difficult to turn. This is not only disadvantageous for the strand quality, but also represents a danger for the entire system, since the strand grinds along the stuck rolls, which can tear open the still thin strand shell and thus lead to a strand breakthrough.

Die vorliegende Erfindung stellt sich die Aufgabe, steckengebliebene Rollen möglichst frühzeitig ermitteln zu können. Dies soll ohne längere Betriebsunterbrechung möglich sein. Insbesondere soll die Ermittlung von steckengebliebenen Rollen ohne Demontage von Bauteilen der Rollenbahn durchführbar sein.The object of the present invention is to be able to determine stuck roles as early as possible. This should be possible without a long shutdown. In particular, it should be possible to determine stuck rollers without dismantling components of the roller conveyor.

Diese Aufgabe wird erfindungsgemäss gelöst durch einen entlang der Rollenbahn bewegbaren, einen Reibkopf tragenden Tragkörper, welcher Reibkopf an die Mantelfläche aufeinanderfolgender Rollen pressbar ist, wobei eine Vorrichtung zum Registrieren bzw. Messen eines Unterschiedes der Geschwindigkeit des Tragkörpers, mit der dieser entlang der Rollenbahn bewegt ist, und der Geschwindigkeit des mit einer Rolle in Kontakt gelangenden Teiles des Reibkopfes vorgesehen ist. Der Tragkörper kann an den Anfahrstrang gekuppelt werden und mit dem Anfahrstrang zwischen den Rollenbahnen hindurchbewegt werden, was bei Stranggiessanlagen eine Routinearbeit darstellt, die nur sehr kurze Zeit beansprucht.This object is achieved according to the invention by a support body which is movable along the roller conveyor and carries a reaming head, which reaming head can be pressed onto the lateral surface of successive rollers, a device for registering or measuring a difference in the speed of the support body at which it is moved along the roller conveyor , and the speed of the part of the reaming head coming into contact with a roller is provided. The support body can be coupled to the start-up line and moved with the start-up line between the roller conveyors, which is a routine task in continuous casting systems which takes up only a very short time.

Vorteilhaft weist der Tragkörper mindestens eine mit den Rollen einer Rollenbahn in Kontakt stehende Fläche auf und ist der Reibkopf an dem Tragkörper federnd gelagert, wobei er bei Kontakt mit einer Rolle aus einer über die Fläche vorstehenden Position in eine mit der Fläche fluchtende Position bewegbar ist.The support body advantageously has at least one surface that is in contact with the rollers of a roller conveyor and the friction head is resiliently mounted on the support body, wherein upon contact with a roller it can be moved from a position protruding beyond the surface to a position in alignment with the surface.

Nach einer bevorzugten Ausführungsform ist der Reibkopf als Reibrad ausgebildet, wobei das Reibrad mit seinem Umfang gegen die Mantelfläche einer Rolle anpressbar ist, und ist eine eine Drehbewegung des Reibrades anzeigende Einrichtung vorgesehen.According to a preferred embodiment, the friction head is designed as a friction wheel, the circumference of the friction wheel being able to be pressed against the outer surface of a roller, and a device indicating a rotational movement of the friction wheel is provided.

Zweckmässig ist das Reibrad an einem am Tragkörper montierten Schwenkarm gelagert, wobei die Schwenkachse des Schwenkarmes parallel zur Achse des Reibrades gerichtet ist und der Schwenkarm mittels einer Federeinrichtung gegen einen seine Bewegung gegen die Rollen begrenzenden Anschlag bewegbar ist.The friction wheel is expediently mounted on a swivel arm mounted on the support body, the swivel axis of the swivel arm being directed parallel to the axis of the friction wheel and the swivel arm being movable by means of a spring device against a stop limiting its movement against the rollers.

Nach einer anderen vorteilhaften Ausführungsform ist das Reibrad entlang einer Führung gleitbar gelagert und mittels einer Federeinrichtung gegen einen seine Bewegung gegen die Rollen begrenzenden Anschlag pressbar.According to another advantageous embodiment, the friction wheel is slidably mounted along a guide and can be pressed by means of a spring device against a stop limiting its movement against the rollers.

Es ist von Vorteil, wenn das Reibrad als Antrieb für eine Nockenscheibe dient, deren Nocken bei einer Drehbewegung Signale auslösen, vorzugsweise einen elektrischen Kontakt schliessen.It is advantageous if the friction wheel serves as a drive for a cam disk, the cams of which trigger signals when they rotate, preferably close an electrical contact.

Das Reibrad kann auch zweckmässig mit einem Tachogenerator verbunden sein.The friction wheel can also be expediently connected to a tachometer generator.

Nach einer weiteren bevorzugten Ausführungsform ist der Reibkopf als Kolben ausgebildet, der gegen die Mantelfläche einer Rolle etwa rechtwinkelig zur Rollenbahn anpressbar und in Bewegungsrichtung des Tragkörpers an dem Tragkörper entlang von Führungen verschiebbar gelagert ist, wobei eine Einrichtung zur Registrierung bzw. Messung einer Relativbewegung des Kolbens gegenüber dem Tragkörper in Bewegungsrichtung des Tragkörpers vorgesehen ist.According to a further preferred embodiment, the reaming head is designed as a piston, which can be pressed against the outer surface of a roller at approximately a right angle to the roller conveyor and is displaceably mounted on guides on the carrier body in the direction of movement of the carrier body, with a device for registering or measuring a relative movement of the piston is provided relative to the support body in the direction of movement of the support body.

Zweckmässig ist bei dieser Ausführungsform der Kolben auf einem in Bewegungsrichtung des Tragkörpers verschiebbaren Wagen montiert, der vorzugsweise mittels Längsführungen an am Tragkörper vorgesehenen Rollen verschiebbar ist, wobei an dem Wagen und an dem Tragkörper Weggeber zur Registrierung einer Relativbewegung zwischen Wagen und Tragkörper, wie eine Magnetspule mit Eisenkern oder elektrische Kontakte, vorgesehen sind.In this embodiment, the piston is expediently mounted on a carriage which can be displaced in the direction of movement of the support body and which can preferably be displaced by means of longitudinal guides on rollers provided on the support body, with position indicators on the carriage and on the support body for registering a relative movement between the carriage and the support body, such as a magnetic coil with iron core or electrical contacts are provided.

Vorzugsweise ist die mit der Rollenbahn in Kontakt stehende Fläche des Tragkörpers von einem elastisch verformbaren Stahlband gebildet.The surface of the support body which is in contact with the roller conveyor is preferably formed by an elastically deformable steel strip.

Die Erfindung ist nachfolgend anhand der Zeichnung an drei Ausführungsbeispielen näher erläutert, wobei Fig. 1 eine Seitenansicht einer erfindungsgemässen Einrichtung nach einer ersten Ausführungsform, Fig. 2 einen Schnitt gemäss der Linie 11-11 der Fig. 1, Fig. 3 ein Detail der Fig. 1 in vergrössertem Massstab und Fig. 4 einen Schnitt gemäss der Linie IV-IV der Fig. 3 nach dieser Ausführungsform zeigen. In Fig. 5 ist in zu Fig. 4 analoger Darstellung eine weitere Ausführungsform gezeigt. Fig. 6 stellt eine dritte Ausführungsform im senkrecht zu den Rollenachsen der Rollenbahnen geführten Schnitt dar. Fig. 7 zeigt einen gemäss der Linie VII-VII der Fig. 6 geführten Schnitt, Fig. 8 einen Schnitt, der gemäss der Linie VIII-VIII der Fig. 7 geführt ist.The invention is explained in more detail below with reference to the drawing using three exemplary embodiments, wherein FIG. 1 shows a side view of an inventive device according to a first embodiment, FIG. 2 shows a section along the line 11-11 of FIG. 1, FIG. 3 shows a detail of FIG 1 on an enlarged scale, and FIG. 4 shows a section along the line IV-IV of FIG. 3 according to this embodiment. A further embodiment is shown in FIG. 5 in a representation analogous to FIG. 4. FIG. 6 shows a third embodiment in a section perpendicular to the roller axes of the roller conveyors. FIG. 7 shows a section along line VII-VII of FIG. 6, FIG. 8 shows a section along line VIII-VIII of FIG Fig. 7 is performed.

Zwischen Rollenbahnen 1 und 2, deren Rollen mit 3 bezeichnet sind, einer Strangführung einer Stranggiessanlage ist die Einrichtung 4 zum Orten von steckengebliebenen Rollen eingeschoben. Sie ist mittels einer Kupplung 5 mit einem Kaltstrang 6 verbunden. Die Einrichtung weist einen Tragkörper 7 auf, der von zwei einander gegenüberliegenden elastisch verformbaren Stahlbändern 8, 8' gebildet ist, die durch hintereinander liegende Federtöpfe 9, 9' auseinander gepresst werden. Dadurch gelangen die Stahlbänder 8, 8' mit den Rollen 3 der Rollenbahnen 1 und 2 in Kontakt. Beim Durchziehen bzw. Durchschieben des Tragkörpers 7 werden die nicht steckengebliebenen Rollen 3 in Drehung versetzt. Anstelle der Federtöpfe 9, 9' könnten auch hydraulisch oder pneumatisch beaufschlagte, die Stahlbänder 8, 8' auseinanderpressende Kolben usw. vorgesehen sein.The device 4 for locating stuck rollers is inserted between roller conveyors 1 and 2, the rollers of which are designated 3, a strand guide of a continuous casting installation. It is connected to a cold strand 6 by means of a coupling 5. The device has a support body 7, which is formed by two elastically deformable steel strips 8, 8 'located opposite one another, which are pressed apart by spring pots 9, 9' located one behind the other. As a result, the steel strips 8, 8 'come into contact with the rollers 3 of the roller tracks 1 and 2. When pulling or pushing through the support body 7, the rollers 3 that have not got stuck are set in rotation. Instead of the spring pots 9, 9 ', hydraulically or pneumatically actuated pistons, which press the steel strips 8, 8' apart, could also be provided.

Mit dem mittleren Federtopf 9' ist der Tragkörper 7 über ein Gestänge 10 und seitlich angeordnete Längstraversen 11 mit der Kupplung 5 gelenkig verbunden. An einem der Stahlbänder 8 ist eine Konsole 12 angenietet, an der ein Schwenkarm 13 angelenkt ist, wobei die Schwenkachse 14 parallel zu den Achsen 15 der Rollen 3 der Strangführungsbahnen liegt. Der Schwenkarm wird mittels einer Feder 16 stets in Richtung des Pfeiles 16', also zu den Rollenbahnen hin bewegt. Ein Anschlag 17 für den Schwenkarm 13 sorgt dafür, dass der Schwenkarm nicht zu weit gegen die Rollen 3 gedrückt wird. Am freien Ende des Schwenkarmes 13 ist ein als Reibrad 18 ausgebildeter Reibkopf drehbar gelagert. Die Achse 19, um die das Reibrad 18 drehbar ist, ist parallel zur Schwenkachse 14 des Schwenkarmes gerichtet. Am Reibrad 18 ist koaxial eine Nockenscheibe 20 befestigt, deren Nocken 21 bei einer Drehbewegung des Reibrades 18 einen elektrischen Kontakt 22 schliessen.With the middle spring cup 9 ', the support body 7 is articulated to the coupling 5 via a linkage 10 and laterally arranged longitudinal cross members 11. A bracket 12 is riveted to one of the steel strips 8, to which a swivel arm 13 is articulated, the swivel axis 14 being parallel to the axes 15 of the rollers 3 of the strand guideways. The swivel arm is always moved by means of a spring 16 in the direction of arrow 16 ', that is to say towards the roller tracks. A stop 17 for the swivel arm 13 ensures that the swivel arm is not pressed too far against the rollers 3. At the free end of the swivel arm 13, a friction head designed as a friction wheel 18 is rotatably mounted. The axis 19, about which the friction wheel 18 is rotatable, is directed parallel to the pivot axis 14 of the pivot arm. A cam disk 20 is fastened coaxially to the friction wheel 18, the cams 21 of which close an electrical contact 22 when the friction wheel 18 rotates.

Die Funktion der Einrichtung ist folgende: Die durch die Federtöpfe 9,9' gespreizten Stahlbänder 8, 8' gelangen mit den Rollen 3 der Rollenbahnen 1,2 in Kontakt, wobei nach Überwindung des Lagerspieles der Rollen 3 diese, sofern sie nicht stekken, durch Durchziehen der Einrichtung 4 zwischen den Rollenbahnen 1, 2 gedreht werden. Die Rollenumfangsgeschwindigkeit entspricht dabei der Transportgeschwindigkeit des Tragkörpers 7. Das federnd gegen die Rollen 3 gepresste Reibrad 18 führt, sofern sich die Rollen drehen, bei Kontakt mit den Rollen keine Relativbewegung gegenüber dem Tragkörper 7 aus, da der Umfang des Reibrades 18 mit der Transportgeschwindigkeit des Tragkörpers 7 an den Rollen 3 vorbeibewegt wird. Das Reibrad 18 wird lediglich aus seiner über das Stahlband 8 vorstehenden Position zurückgedrückt, bis der Umfang des Reibrades 18 mit dem Stahlband 8, das mit den Mantelflächen der Rollen 3 in Kontakt steht, fluchtet. Gelangt das Reibrad mit einer steckengebliebenen bzw. nur erschwert drehbaren Rolle 3 in Kontakt - bei einer solchen Rolle kommt es zu einer Gleitbewegung zwischen der Kontaktfläche 23 des Stahlbandes 8 und der oberfläche der Rolle - wird das Reibrad 18 in Drehung versetzt und der elektrische Kontakt 22 geschlossen. Das Schliessen des elektrischen Kontaktes wird dazu genützt, ein Signal an ein Registriergerät zu leiten, welches beispielsweise in einem an der Einrichtung 4 montierten Kasten 24 untergebracht ist. Mit Hilfe drahtloser Übermittlung der Signale wäre es auch möglich, das Registriergerät, unabhängig vom Tragkörper 7, beispielsweise an einem ortsfesten Kontrollstand anzuordnen. Wenn das Registriergerät zusätzlich zu jedem Signal auch die jeweilige Lage des Tragkörpers innerhalb der Rollenbahnen erfasst, so kann man unmittelbar die Lage der steckengebliebenen Rollen feststellen. Die Lage einer steckenden Rolle kann in Verbindung mit einem über das Stahlband herausragenden, axial beweglichen Taststift 25 festgehalten werden, der von jeder Strangführungsrolle 3, an der er vorbeiwandert, niedergedrückt wird und dabei ein Signal aulöst. Signale können durch den elektrischen Kontakt oder auch in anderer Art und Weise ausgelöst werden, beispielsweise pneumatisch.The function of the device is as follows: The steel belts 8, 8 'spread by the spring pots 9, 9' come into contact with the rollers 3 of the roller conveyors 1, 2, after overcoming the bearing play of the rollers 3, provided that they are not stuck through them Pulling the device 4 between the roller tracks 1, 2 are rotated. The roller circumferential speed corresponds to the transport speed of the carrier body 7. The friction wheel 18 pressed resiliently against the rollers 3, provided the rollers rotate, does not make any relative movement with respect to the carrier body 7 when the rollers come into contact, since the circumference of the friction wheel 18 corresponds to the transport speed of the Carrier body 7 is moved past the rollers 3. The friction wheel 18 is simply pushed back from its position projecting beyond the steel belt 8 until the circumference of the friction wheel 18 is aligned with the steel belt 8, which is in contact with the outer surfaces of the rollers 3. If the friction wheel comes into contact with a stuck or only difficult to rotate roller 3 - with such a roller there is a sliding movement between the contact surface 23 of the steel strip 8 and the surface of the roller - the friction wheel 18 is rotated and the electrical contact 22 closed. The closing of the electrical contact is used to send a signal to a registration device, which is accommodated, for example, in a box 24 mounted on the device 4. With the aid of wireless transmission of the signals, it would also be possible to arrange the recording device, for example, at a stationary control station, independently of the support body 7. If, in addition to each signal, the recording device also detects the respective position of the supporting body within the roller tracks, the position of the stuck rollers can be determined immediately. The position of a stuck roller can be recorded in connection with an axially movable stylus 25 protruding over the steel band, which is depressed by each strand guide roller 3, which it moves past, thereby triggering a signal. Signals can be triggered by the electrical contact or in another way, for example pneumatically.

Zur Kontrolle der Rollen 3 der unteren Rollenbahn 2 wird die Einrichtung 4 um 180° um ihre Längsachse gewendet und nochmals zwischen den Rollenbahnen hindurchbewegt. Es ist auch möglich, an beiden Stahlbändern 8, 8' ein Reibrad 18 vorzusehen, so dass ein Orten steckengebliebener Rollen an beiden Rollenbahnen 1, 2 in einem Arbeitsgang möglich ist.To control the rollers 3 of the lower roller conveyor 2, the device 4 is turned through 180 ° about its longitudinal axis and moved again between the roller conveyors. It is also possible to provide a friction wheel 18 on both steel belts 8, 8 ', so that it is possible to locate stuck rollers on both roller tracks 1, 2 in one operation.

Bei der in Fig. 5 dargestellten Ausführungsform ist das Reibrad 18 entlang einer senkrecht zur Kontaktfläche 23 des Stahlbandes 8 gerichteten Führung 26 verschiebbar. Die Führung ist als Kolben ausgebildet, der an einem am Stahlband 8 befestigten Zylinder 27 gleitet. Eine Feder 28 dient zum Anpressen des Reibrades 18 an die Strangführungsrollen, wobei ebenfalls ein Anschlag 17 die Bewegung gegen die Rollen 3 begrenzt. Eine Drehbewegung des Reibrades 18 wird an einen Tachogenerator 29 übertragen, der ein der Drehbewegung des Reibrades entsprechendes Signal an ein Registriergerät abgibt.In the embodiment shown in FIG. 5, the friction wheel 18 can be displaced along a guide 26 directed perpendicular to the contact surface 23 of the steel strip 8. The guide is designed as a piston which slides on a cylinder 27 fastened to the steel strip 8. A spring 28 serves to press the friction wheel 18 against the strand guide rollers, a stop 17 likewise limiting the movement against the rollers 3. A rotational movement of the friction wheel 18 is transmitted to a tachometer generator 29, which emits a signal corresponding to the rotational movement of the friction wheel to a recording device.

Die senkrechte Bewegung des Reibrades 18 samt Gehäuse und Kolben 26, die jedesmal stattfindet, wenn das Gerät von einer Strangführungsrolle niedergedrückt wird, kann in g!eicher Weise wie die Bewegung eines axial beweglichen Taststiftes 25 in Form eines Ausgangssignals zur Registrierung der Lage der jeweiligen Rolle verwendet werden.The vertical movement of the friction wheel 18 together with the housing and piston 26, which takes place every time the device is pressed down by a strand guide roller, can be done in the same way as the movement of an axially movable stylus 25 in the form of an output signal for registering the position of the respective roller be used.

Bei der in den Fig. 6 bis 8 dargestellen Ausführungsform ist der Reibkopf als Kolben 30 ausgebildet, der etwa senkrecht zur Kontaktfläche 23 des Stahlbandes 8 verschiebbar gelagert ist und durch eine Feder 31 nach aussen über die Kontaktfläche 23 hinausgepresst wird. Der Kolben 30 ist an einem in Bewegungsrichtung des Tragkörpers 7, welche Richtung durch den Doppelpfeil 32 markiert ist, verschiebbaren Wagen 33 montiert. Der Wagen 33 weist Längsführungen 34 auf, welche mit am Tragkörper 7 angeordneten Rollen 35 in Kontakt stehen. Zur Anzeige einer Relativbewegung des Kolbens 30 gegenüber dem Tragkörper 7 in Bewegungsrichtung des Tragkörpers - eine solche Relativbewegung tritt dann auf, wenn der Kolben mit einer steckengebliebenen bzw. schwer drehbaren Rolle 3 in Kontakt gelangt- ist ein induktiver Weggeber 36, wie in Fig. 6 auf der linken Seite dargestellt, vorgesehen. Hierbei taucht ein im Wagen 33 montierter Eisenkern 37 in eine Magnetspule 38, die am Tragkörper 7 befestigt ist. Anstelle des induktiven Weggebers könnte auch ein als elektrischer Kontakt 39 ausgebildeter Weggeber vorgesehen sein, wie er in Fig. 6 auf der rechten Seite dargestellt ist. Der Wagen 33 wird, solange der Kolben 30 nicht durch eine stekkengebliebene Rolle 3 eine Relativbewegung gegenüber dem Tragkörper 7 in Längsrichtung des Tragkörpers ausführt, mittels zweier Federn 40, die sich jeweils gegen den Wagen 33 bzw. gegen Konsolen 41, die am Stahlband 8 befestigt sind, stützen, in Mittellage gehalten.In the embodiment shown in FIGS. 6 to 8, the reaming head is designed as a piston 30, which is displaceably mounted approximately perpendicular to the contact surface 23 of the steel strip 8 and is pressed outwards beyond the contact surface 23 by a spring 31. The piston 30 is mounted on a carriage 33 which can be displaced in the direction of movement of the support body 7, which direction is marked by the double arrow 32. The carriage 33 has longitudinal guides 34 which are in contact with rollers 35 arranged on the support body 7. To indicate a relative movement of the piston 30 relative to the support body 7 in the direction of movement of the support body - such a relative movement occurs when the piston comes into contact with a stuck or difficult to rotate roller 3 - an inductive displacement sensor 36 is provided, as shown in Fig. 6 on the left side. Here, an iron core 37 mounted in the carriage 33 is immersed in a magnetic coil 38 which is fastened to the support body 7. Instead of the inductive displacement sensor, a displacement sensor designed as an electrical contact 39 could also be provided, as is shown on the right in FIG. 6. The carriage 33 is, as long as the piston 30 does not perform a relative movement with respect to the support body 7 in the longitudinal direction of the support body by means of a roller 3 which has remained stuck, by means of two springs 40, each of which is fixed against the carriage 33 or against brackets 41 which are fastened to the steel belt 8 are, support, held in the middle position.

Claims (11)

1. Arrangement for locating rollers (3) with an increased rotatory resistance in a rollerway (1, 2), in particular strand-guiding rollers in a continuous casting plant, characterised by a supporting body (7) movable along the rollerway (1, 2) and carrying a frictional head (18,30), which frictional head (18,30) is pressable against the surface area of subsequently arranged rollers (3), an arrangement (20, 22; 29; 36, 39) being provided for recording and measuring a difference between the velocity of the supporting body (7) with which the latter is moved along the rollerway (1, 2) and the velocity of that part of the frictional head (18, 30) which gets into contact with a roller (3).
2. Arrangement according to claim 1, characterised in that the supporting body (7) has at least one surface (23) that is in contact with the rollers (3) of a rollerway (1, 2) and the frictional head (18, 30) is resiliently mounted on the supporting body (7) and, when getting into contact with a roller (3), is movable from a position projecting beyond the surface (23) into a position in alignment with the surface (23).
3. Arrangement according to claim 1 or 2, characterised in thatthefrictional head is designed as a frictional wheel (18), the frictional wheel (18) being pressable with its circumference against the surface area of a roller (3), and that a means (20, 21, 22, 29) is provided for indicating a rotational movement of the frictional wheel (18) (fig. 1 to 5).
4. Arrangement according to claim 3, characterised in that the frictional wheel (18) is mounted on a pivot arm (13) arranged on the supporting body (7), the pivot axis (14) of the pivot arm being directed parallel to the axis (19) of the frictional wheel (18) and the pivot arm (13) being movable, by means of a spring device (16), agains a stop (17) delimiting its movement towards the rollers (3) (fig. 3, 4).
5. Arrangement according to claim 3, characterised in that the frictional wheel is mounted so as to be slidable along a guide (26) and is pressable by means of a spring device (28) against a stop (17) delimiting its movement towards the rollers (3) (fig. 5).
6. Arrangement according to claims 3 to 5, characterised in that the frictional wheel (18) serves as a drive for a cam disk (20) whose cams (21) initiate signals at a rotational movement, preferably close an electric contact (22) (fig. 3, 4).
7. Arrangement according to claims 3 to 5, characterised in that the frictional wheel (18) is connected with a tachometer generator (29) (fig. 5).
8. Arrangement according to claim 1 or 2, characterised in that the frictional head is designed as a piston (30), which is pressable against the surface area of a roller (3) approximately at a right angle to the rollerway (1, 2) and is mounted on the supporting body (7) so as to be displaceable along guides (34) in the moving direction (32) of the supporting body (7), an arrangement (36; 39) for recording and measuring a relative movement of the piston (30) relative to the supporting body (7) in the moving direction (32) of the supporting body (7) being provided (fig. 6 to 8).
9. Arrangement according to claim 8, characterised in that the piston is mounted on a car (33) displaceable in the moving direction (32) of the supporting body (7), which car preferably is displaceable by means of longitudinal guides (34) on rollers (35) provided on the supporting body (7).
10. Arrangement according to claim 9, characterised in that, on the car (33) and on the supporting body (7), distance indicators for recording a relative movement between the car and the supporting body, such as a magnetic coil (38) with an iron core (37), or electric contacts (39), are provided.
11. Arrangement according to claims 2 to 10, characterised in that the surface (23) of the supporting body (7) which is in contact with the rollerway (1, 2) is formed by an elastically deformable steel strip (8, 8').
EP80890106A 1979-10-22 1980-09-24 Device for locating rollers with an increased rotary resistance in a roller way Expired EP0029422B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0687379A AT364102B (en) 1979-10-22 1979-10-22 DEVICE FOR LOCATING ROLLS WITH AN INCREASED TURNING RESISTANCE IN A ROLLER COVER
AT6873/79 1979-10-22

Publications (3)

Publication Number Publication Date
EP0029422A1 EP0029422A1 (en) 1981-05-27
EP0029422B1 true EP0029422B1 (en) 1983-07-20
EP0029422B2 EP0029422B2 (en) 1987-01-14

Family

ID=3590634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80890106A Expired EP0029422B2 (en) 1979-10-22 1980-09-24 Device for locating rollers with an increased rotary resistance in a roller way

Country Status (8)

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US (1) US4341257A (en)
EP (1) EP0029422B2 (en)
JP (1) JPS5681415A (en)
AT (1) AT364102B (en)
BR (1) BR8006754A (en)
CA (1) CA1136002A (en)
DE (1) DE3064296D1 (en)
ES (1) ES496054A0 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4880749A (en) * 1984-06-05 1989-11-14 Eastman Kodak Company Analytical element and its use in a whole blood hemoglobin assay
SE521918C2 (en) * 2001-05-23 2003-12-16 Skf Ab Method for detecting a squeezing or stationary roll
DE102007006316B3 (en) * 2007-01-30 2008-04-10 Hima Paul Hildebrandt Gmbh + Co Kg Cable e.g. winding cable, position monitoring device for e.g. cableway, has evaluation device comparing movement parameters and determining movement parameter difference corresponding to operational reliability condition of transport system
DE102008015035A1 (en) * 2008-03-13 2009-09-24 Hima Paul Hildebrandt Gmbh + Co Kg Wear monitoring system, cable-operated transport system and method for monitoring wear parts thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1222006A (en) * 1958-03-14 1960-06-07 Electrical device for automatic determination of the maximum difference between the maximum and minimum values of a cross section
FR2248892A1 (en) * 1973-02-28 1975-05-23 Sumitomo Metal Ind Automatic electronic measurement of the roll-gap - between guide and support rolls for continuous casting of slabs
US3853087A (en) * 1973-06-29 1974-12-10 Panhandle Eastern Pipe Line Co Bearing failure indicator
SU665783A3 (en) * 1976-08-27 1979-05-30 Маннесманн Аг, Машиненфабрик Густав Вигард, (Фирма) Devkcg for'measwrkng and monitorkng alignment of open-ended mould and supporving rollers of'radial type continuous-ccsting mahing
DE2645022C3 (en) * 1976-10-06 1980-04-30 Mannesmann Demag Ag, 4100 Duisburg Measuring device for rotatably mounted work rolls, in particular for support, drive and straightening rolls in continuous metal casting plants
FR2375935A1 (en) * 1976-12-29 1978-07-28 Fives Cail Babcock Adjusting the roll gap in the track on continuous casting machines - using template with max. and min. tolerances
DE7813146U1 (en) * 1978-04-28 1979-10-04 Graenges Oxeloesunds Jaernverk Ab, Oxeloesund (Schweden) DEVICE FOR MEASURING THE DISTANCE BETWEEN THE CAST ROLL SUPPORT ROLLERS OF A CONTINUOUS CASTING PLANT FOR STEEL OR METAL
JPS5573452A (en) * 1978-11-29 1980-06-03 Kawasaki Steel Corp Roll revolution detector of continuous casting machine
JPS55133856A (en) * 1979-04-05 1980-10-18 Kawasaki Steel Corp Roll revolution detector

Also Published As

Publication number Publication date
EP0029422A1 (en) 1981-05-27
AT364102B (en) 1981-09-25
ATA687379A (en) 1981-02-15
US4341257A (en) 1982-07-27
EP0029422B2 (en) 1987-01-14
CA1136002A (en) 1982-11-23
ES8200029A1 (en) 1981-10-16
JPS5681415A (en) 1981-07-03
BR8006754A (en) 1981-04-28
DE3064296D1 (en) 1983-08-25
ES496054A0 (en) 1981-10-16

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