EP0021995A1 - Driving device for wide strip - Google Patents

Driving device for wide strip Download PDF

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Publication number
EP0021995A1
EP0021995A1 EP19800400899 EP80400899A EP0021995A1 EP 0021995 A1 EP0021995 A1 EP 0021995A1 EP 19800400899 EP19800400899 EP 19800400899 EP 80400899 A EP80400899 A EP 80400899A EP 0021995 A1 EP0021995 A1 EP 0021995A1
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EP
European Patent Office
Prior art keywords
piston
bearings
ring
cylinder
drive device
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.)
Granted
Application number
EP19800400899
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German (de)
French (fr)
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EP0021995B1 (en
Inventor
André Quehen
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Secim SA
Original Assignee
Secim SA
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Publication date
Application filed by Secim SA filed Critical Secim SA
Publication of EP0021995A1 publication Critical patent/EP0021995A1/en
Application granted granted Critical
Publication of EP0021995B1 publication Critical patent/EP0021995B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B21C47/3408—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the lateral position of the material
    • B21C47/3425—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the lateral position of the material without lateral edge contact

Definitions

  • the present invention relates to a device for driving a laminated metal strip.
  • This device is intended to be mounted next to a tape winder in a broadband rolling mill.
  • tape drive devices in which the tape passes between two parallel drive rollers, mounted in a cage.
  • the lower roller whose diameter and weight are smaller than those of the upper roller is fixedly mounted in the cage.
  • the upper roller is mounted at its ends in bearings which are guided vertically in the cage.
  • the upper roller can be lifted during the engagement of the strip so as to allow the passage of this strip downstream.
  • the downward movement of the upper roller is limited by fixed stops against which the bearings can be applied.
  • the application of the bearings of the upper roller is carried out with great force by preloaded springs.
  • the air gap between the rollers which is adjusted using the fixed stops is slightly less than the thickness of the laminated strip. This air gap is adjustable as a function of the thickness of the laminated strip by adjusting the vertical position of the fixed stops.
  • the force exerted on the strip is equal to the sum of the weight of the upper roller and the force of the preloaded springs which apply to the bearings of this roller.
  • This force exerted on the strip is substantially constant and low, which does not correspond to the best conditions for achieving good training and good guidance of the laminated strip.
  • the invention aims to overcome the drawbacks of existing tape drive devices.
  • the device according to the invention maintains the lower roller in a fixed position for waiting for the engagement of the hot strip. It absorbs the impact of band engagement. It allows, after engagement of the strip between the drive rollers, to adjust the pressure force on this strip, this adjustment can be obtained separately on each bearing mounted at the end of the lower roller. It makes it possible to use a constant and preset hydraulic pressure, when the rollers are in the standby position of the strip or when this strip is engaged between these rollers.
  • the bearings of the upper roller can be positioned against a fixed stop using a prestressing force greater than the separation force of the driving rollers. The position of the fixed stop is preset according to the thickness of the laminated strip.
  • the belt drive device comprises a frame which guides bearings mounted at the ends of two driving rollers so that the axes of these rollers move relatively in a vertical plane, the upper roller being moved by means motors, and it is essentially characterized by the fact that the bearings of the upper roller are applied by said motor means against fixed stops and by the fact that it comprises jacks whose pistons support the bearings of the lower roller and are moved vertically by pressurizing chambers located on the bottom side, each of these jacks being equipped with means capable of moving the end of travel of said piston upwards.
  • the means capable of moving the end of stroke upwards of the piston comprise a ring housed, on the rod side, in the cylinder so as to limit the stroke of the piston upwards and to form a chamber.
  • upper annular connected to a hydraulic fluid supply line, this ring being capable of being applied in the low position against a stop defining a low end of stroke limiting the stroke of the piston upwards.
  • Figure 1 shows schematically in side view and in section, the tape drive device according to the invention.
  • Figure 2 shows the hydraulic circuit of a cylinder for moving the lower roller of the device.
  • the device shown in Figure 1 is used to drive a metal strip 2 which has just been laminated and which will be wound up. It comprises two lateral frames 3 which are arranged on either side of the metal strip 2. The latter passes between two driving rollers 4 and 5 whose axes 41 and 51 are horizontal. Bearings 42 and 52 are mounted respectively at the ends of the rollers 4 and 5. These bearings 42 and 52 are guided respectively by vertical slides 31 and 32 formed by lights of the side frames 3. Thus the rollers 4 and 5 can move relatively in a vertical plane. These drive rollers 4 and 5 are rotated around the axes 41 and 51 respectively, using drive means which are not shown in the drawings.
  • the upper roller 5 can be moved vertically using motor means.
  • These drive means are constituted by double-acting hydraulic cylinders which are each associated with a bearing 52 of the upper roller.
  • Each of these jacks comprises a cylinder 61 which is fixed to the frame 3 and a piston 62 which is integral with a rod 63 hinged to an associated bearing 52.
  • the upper roller is in the high position when the winding device is not used and the strip is directed to a machine located downstream. It is in the low position during use of the winding device. In this low position, the bearings 52 of the upper roller are applied against stops 7 integral with the frame 3 and whose vertical position can be adjusted.
  • These adjustable stops can be of the wedge type or of the screw jack type or of any other equivalent type.
  • stops are adjusted by the operator so that the interval between the upper roller and the lower roller is slightly less than the thickness of the metal strip.
  • the bearings 52 of the upper roller are applied against the stops 7 with an application force which is greater than the maximum separation force generated between the two drive rollers so as to create a preload of the elements associated with each bearing.
  • Each frame 3 is equipped with a hydraulic cylinder which is identified as a whole by the reference 1.
  • Each of these cylinders comprises a cylinder 11 resting on the frame 3 and a piston 12 which is integral with a rod 13 on which rests a bearing 42 of the lower roller.
  • the piston delimits, on the side of its lower face and the bottom of the cylinder, a lower chamber 14 which is supplied by a conduit 15. The pressurization of this chamber 14 moves the piston 12 vertically upwards.
  • each cylinder is equipped with means capable of moving the end of travel of the piston up.
  • each cylinder comprises a ring 16 which is housed on the rod side in the cylinder so as to limit the stroke of the piston 12 upwards.
  • Each ring 16 can slide with seal on the rod 13 which itself crosses the cylinder 11 with seal.
  • this ring 16 can slide with seal in the bore of the cylinder 11 so as to form a sealed annular chamber 17 on the side of its upper side.
  • This annular chamber 17 which surrounds the rod 13 is connected to a hydraulic fluid supply line 18.
  • the ring 16 can be applied in the low position against a stop which defines a low end limit limiting the stroke of the piston towards the top. This stop is constituted by the bottom of the cylinder 11.
  • the ring 16 has a bell shape which allows it to abut against the bottom of the cylinder 11 when the chamber 17 is pressurized. Due to the bell shape of the ring 16, the diameter of the piston 12 is less than the diameter of the inner bore of the cylinder 11. The piston 12 is free to move inside the ring 16 including the upper flange can be applied against the shoulder formed by the piston and its rod.
  • the diameter of the lower chamber 14 is preferably less than the diameter of the piston 12.
  • the annular surface of the ring, on the side of the annular chamber 17, is greater than the surface for applying pressure in the chamber 14 located above below the underside of the piston, i.e. on the surface of a horizontal section. Therefore, when the chambers 17 and 14 are supplied under equal pressures, the ring 16 is applied against the lower bottom of the cylinder 11.
  • the hydraulic circuit represented by FIG. 2 comprises an electro-hydraulic distributor 20 which controls the supply of hydraulic liquid to the upper chamber 17 from the supply line 23.
  • a pressure regulator 21 the control of which is available to the the operator modifies the pressure of the hydraulic fluid between the supply line 23 located upstream and the line 15 opening into the lower chamber 14.
  • a hydraulic damper 19 is connected to the line 15 located downstream of the pressure regulator 21.
  • the lower roller 4 Before the engagement of the metal strip between the rollers, the lower roller 4 is in the low and fixed position. This position is lowered by putting the chambers 14 and 17 under pressure. Because the pressures in these chambers are equal and the surface of ap plication in the chamber 17 is greater than the surface of application in the chamber 14, the ring 16 is in abutment against the lower bottom of the cylinder 11. The piston 12 is applied against the collar of the ring 16. The position of the roller upper 5 is adjusted by the stops 7.
  • the bearings 52 of the upper roller remain applied against the stops 7.
  • the bearings 42 of the lower roller can then move slightly downwards by pushing the piston 12 and pushing back and or by compressing the liquid in the chamber 14.
  • the mobile assembly formed by the lower roller and by its bearings is lighter than the mobile assembly formed by the upper roller and its bearings. As a result, the harmful effects due to the shocks caused by the introduction of the strip are relatively reduced.
  • the pressure in the annular chamber 17 is removed using the distributor 20. Therefore the ring 16 is free to move inside the cylinder 17 and it can therefore go up to come up against the upper bottom - rod side - of the cylinder.
  • the stroke of the piston 12 is therefore increased by the stroke of the ring 16.
  • the pressurization of the upper chamber 17 corresponds to a low end of stroke limiting the stroke of the piston upwards.
  • the removal of the pressurization of the upper chamber 17 corresponds to a high end limit limiting the stroke of the piston upwards.
  • the lower roller 4 is applied to the metal strip with a force corresponding to the pressure prevailing in the chamber 14.
  • This pressure is constant but it is adjustable by the operator as a function of the dimensional characteristics of the strip 2.
  • This setting of the pressure in chamber'14 can be obtained using the pressure regulator 21.
  • the pressure can be adjusted differently between the cylinders located on the right and left side of the strip so as to compensate for any symmetry defects in the drive device or in guiding the strip.
  • the annular chamber 17 is again pressurized by maneuvering the distributor 20 so as to position the lower roller in its fixed waiting position.

Abstract

1. Device for driving a strip (2), comprising an upper roller (5) mounted at its ends in bearings (52) guided vertically by a frame (3), and drive means (61, 62, 63) for displacing the said bearings (52), and a lower roller (4) mounted at its ends in bearings (42) guided by the frame (3) and each displaced by a hydraulic jack (1) comprising a cylinder (11) and a rod (13) fixed to a piston (12) delimiting a lower chamber (14) connected to a hydraulic circuit, characterized in that it possesses tops (7) limiting the travel of the bearings (52) of the upper roller (5), and in that the jack (1) possesses a ring (16) which slides, on the same side as the rod, in the cylinder (11) under the action of hydraulic means (17, 18) which make it possible to bring the ring into a low position in which it is up against the cylinder and limits the stroke of the piston (12) upwardly to an intermediate position, in such a way that the lower roller (4) is moved away from the upper roller (5) before the strip (2) is engaged.

Description

La présente invention est relative à un dispositif d'entrainement de bande métallique laminée. Ce dispositif est destiné à être monté à côté d'une enrouleuse de bande dans un laminoir à large bande.The present invention relates to a device for driving a laminated metal strip. This device is intended to be mounted next to a tape winder in a broadband rolling mill.

Il existe des dispositifs d'entrainement de bande dans lesquels la bande passe entre deux rouleaux d'entrainement parallèles, montés dans une cage. Le rouleau inférieur dont le diamètre et le poids sont plus faibles que ceux du rouleau supérieur est monté fixe dans la cage. Le rouleau supérieur est monté à ses extrémités dans des paliers qui sont guidés verticalement dans la cage. Le rouleau supérieur peut être soulevé lors de l'engagement de la bande de façon à laisser le passage de cette bande vers l'aval. Le mouvement du rouleau supérieur vers le bas est limité par des butées fixes contre lesquelles les paliers peuvent être appliqués. L'application des paliers du rouleau supérieur est effectuée avec une force importante par des ressorts précontraints. L'entrefer entre les rouleaux qui est réglé à l'aide des butées fixes est légèrement inférieur à l'épaisseur de la bande laminée. Cet entrefer est réglable en fonction de l'épaisseur de la bande laminée par réglage de la position verticale des butées fixes. La force exercée sur la bande est égale à la somme du poids du rouleau supérieur et de l'effort des ressorts précontraints qui s'appliquent sur les paliers de ce rouleau. Cette force exercée sur la bande est sensiblement constante et faible ce qui ne correspond pas aux meilleures conditions pour réaliser un bon entrainement et un bon guidage de la bande laminée.There are tape drive devices in which the tape passes between two parallel drive rollers, mounted in a cage. The lower roller whose diameter and weight are smaller than those of the upper roller is fixedly mounted in the cage. The upper roller is mounted at its ends in bearings which are guided vertically in the cage. The upper roller can be lifted during the engagement of the strip so as to allow the passage of this strip downstream. The downward movement of the upper roller is limited by fixed stops against which the bearings can be applied. The application of the bearings of the upper roller is carried out with great force by preloaded springs. The air gap between the rollers which is adjusted using the fixed stops is slightly less than the thickness of the laminated strip. This air gap is adjustable as a function of the thickness of the laminated strip by adjusting the vertical position of the fixed stops. The force exerted on the strip is equal to the sum of the weight of the upper roller and the force of the preloaded springs which apply to the bearings of this roller. This force exerted on the strip is substantially constant and low, which does not correspond to the best conditions for achieving good training and good guidance of the laminated strip.

On a cherché à améliorer ce dispositif d'entrainement en com- plétant;la force exercée sur la bande laminée à l'aide de vérins agissant sur les paliers du rouleau supérieur. Ces vérins permettent d'ajouter ou de retrancher une force complémentaire à celle due au poids du rouleau et éventuellement à l'effort des ressorts précontraints. Toutefois un tel dispositif présente les inconvénients suivants : les jeux sont importants, les parties mobiles présentent une inertie importante ce qui ne favorise pas l'engagement de la bande laminée, les pré- réglages ne sont pas faciles à réaliser.Attempts have been made to improve this complementary drive device ; the force exerted on the rolled strip by means of jacks acting on the bearings of the upper roller. These jacks make it possible to add or subtract a force complementary to that due to the weight of the roller and possibly to the force of the prestressed springs. However, such a device has the following drawbacks: the games are large, the moving parts have a high inertia which does not favor the engagement of the laminated strip, the presettings are not easy to carry out.

L'invention a pour but de pallier les inconvénients des dispositifs d'entraînement de bande existants. Le dispositif selon l'invention assure le maintien en position fixe du rouleau inférieur pendant l'attente de l'engagement de la bande à chaud. Il permet d'amortir l'impact d'engagement de la bande. Il permet, après engagement de la bande entre les rouleaux entraineurs, de régler la force de pression sur cette bande, ce réglage pouvant être obtenu séparément sur chaque palier monté à l'extrémité du rouleau inférieur. Il permet d'utiliser une pression hydraulique constante et préréglée, lorsque les rouleaux sont en position d'attente de la bande ou lorsque cette bande est engagée entre ces rouleaux. Les paliers du rouleau supérieur peuvent être positionnés contre une butée fixe à l'aide d'une force de précontrainte supérieure à la force de séparation des rouleaux entraineurs. La position de la butée fixe est préréglable en fonction de l'épaisseur de la bande laminée.The invention aims to overcome the drawbacks of existing tape drive devices. The device according to the invention maintains the lower roller in a fixed position for waiting for the engagement of the hot strip. It absorbs the impact of band engagement. It allows, after engagement of the strip between the drive rollers, to adjust the pressure force on this strip, this adjustment can be obtained separately on each bearing mounted at the end of the lower roller. It makes it possible to use a constant and preset hydraulic pressure, when the rollers are in the standby position of the strip or when this strip is engaged between these rollers. The bearings of the upper roller can be positioned against a fixed stop using a prestressing force greater than the separation force of the driving rollers. The position of the fixed stop is preset according to the thickness of the laminated strip.

Le dispositif d'entrainement de la bande selon l'invention comprend un bâti qui guide des paliers montés aux extrémités de deux rouleaux entraineurs de manière que les axes de ces rouleaux se déplacent relativement dans un plan vertical, le rouleau supérieur étant déplacé par des moyens moteurs, et il est essentiellement caractérisé par le fait que les paliers du rouleau supérieur sont appliqués par lesdits moyens moteurs contre des butées fixes et par le fait qu'il comprend des vérins dont les pistons supportent les paliers du rouleau inférieur et sont déplacés verticalement par la mise en pression de chambres situées côté fond, chacun de ces vérins étant équipé de moyens capables de déplacer la fin de course dudit piston vers le haut.The belt drive device according to the invention comprises a frame which guides bearings mounted at the ends of two driving rollers so that the axes of these rollers move relatively in a vertical plane, the upper roller being moved by means motors, and it is essentially characterized by the fact that the bearings of the upper roller are applied by said motor means against fixed stops and by the fact that it comprises jacks whose pistons support the bearings of the lower roller and are moved vertically by pressurizing chambers located on the bottom side, each of these jacks being equipped with means capable of moving the end of travel of said piston upwards.

Selon une caractéristique de l'invention, les moyens capables de déplacer la fin de course vers le haut du piston comprennent une bague logée, du côté tige, dans le cylindre de manière à limiter la course du piston vers le haut et à former une chambre supérieure annulaire, connectée à une conduite d'alimentation en liquide hydraulique, cette bague étant susceptible d'être appliquée en position basse contre une butée définissant une fin de course basse limitant la course du piston vers le haut.According to a characteristic of the invention, the means capable of moving the end of stroke upwards of the piston comprise a ring housed, on the rod side, in the cylinder so as to limit the stroke of the piston upwards and to form a chamber. upper annular, connected to a hydraulic fluid supply line, this ring being capable of being applied in the low position against a stop defining a low end of stroke limiting the stroke of the piston upwards.

L'invention va maintenant être décrite avec plus de détails en se référant à un mode de réalisation donné à titre d'exemple et représenté par les dessins annexés.The invention will now be described in more detail with reference to an embodiment given by way of example and represented by the accompanying drawings.

La figure 1 représente schématiquement en vue latérale et en coupe, le dispositif d'entraînement de bande selon l'invention.Figure 1 shows schematically in side view and in section, the tape drive device according to the invention.

La figure 2 représente le circuit hydraulique d'un vérin de déplacement du rouleau inférieur du dispositif.Figure 2 shows the hydraulic circuit of a cylinder for moving the lower roller of the device.

Le dispositif représenté par la figure 1 sert à entrainer une bande métallique 2 qui vient d'être laminée et qui va être enroulée. Il comprend deux bâtis latéraux 3 qui sont disposés de part et d'autre de la bande métallique 2. Celle-ci passe entre deux rouleaux entraineurs 4 et 5 dont les axes 41 et 51 sont horizontaux. Des paliers 42 et 52 sont montés respectivement aux extrémités des rouleaux 4 et 5. Ces paliers 42 et 52 sont guidés respectivement par des glissières verticales 31 et 32 formées par des lumières des bâtis latéraux 3. Ainsi les rouleaux 4 et 5 peuvent se déplacer relativement dans un plan vertical. Ces rouleaux entraineurs 4 et 5 sont entrainés en rotation, autour des axes 41 et 51 respectivement, à l'aide de moyens d'entraînement qui ne sont pas représentés par les dessins.The device shown in Figure 1 is used to drive a metal strip 2 which has just been laminated and which will be wound up. It comprises two lateral frames 3 which are arranged on either side of the metal strip 2. The latter passes between two driving rollers 4 and 5 whose axes 41 and 51 are horizontal. Bearings 42 and 52 are mounted respectively at the ends of the rollers 4 and 5. These bearings 42 and 52 are guided respectively by vertical slides 31 and 32 formed by lights of the side frames 3. Thus the rollers 4 and 5 can move relatively in a vertical plane. These drive rollers 4 and 5 are rotated around the axes 41 and 51 respectively, using drive means which are not shown in the drawings.

Le rouleau supérieur 5 peut-être déplacé verticalement à l'aide de moyens moteurs. Ces moyens moteurs sont constitués par des vérins hydrauliques à double effet qui sont associés chacun à un palier 52 du rouleau supérieur. Chacun de ces vérins comprend un cylindre 61 qui est fixé au bâti 3 et un piston 62 qui est solidaire d'une tige 63 articulée à un palier 52 associé. Le rouleau supérieur est en position haute lorsque le dispositif d'enroulement n'est pas utilisé et que la bande est dirigée vers une machine située en aval. Il est en position basse pendant l'utilisation dudispositif d'enroulement. Dans cette position basse, les paliers 52 du rouleau supérieur sont appliqués contre des butées 7 solidaires du bâti 3 et dont la position verticale peut être réglée. Ces butées réglables peuvent être de type à coin ou de type à vérin à vis ou de tout autre type équivalent. Ces butées sont réglées par l'opérateur de telle sorte que l'intervalle entre le rouleau supérieur et le rouleau inférieur soit légèrement inférieur à l'épaisseur de la bande métallique. Les paliers 52 du rouleau supérieur sont appliqués contre les butées 7 avec une force d'application qui est supérieure à l'effort maximal de séparation engendré entre les deux rouleaux d'entrainement de façon à créer une précontrainte des éléments associés à chaque palier.The upper roller 5 can be moved vertically using motor means. These drive means are constituted by double-acting hydraulic cylinders which are each associated with a bearing 52 of the upper roller. Each of these jacks comprises a cylinder 61 which is fixed to the frame 3 and a piston 62 which is integral with a rod 63 hinged to an associated bearing 52. The upper roller is in the high position when the winding device is not used and the strip is directed to a machine located downstream. It is in the low position during use of the winding device. In this low position, the bearings 52 of the upper roller are applied against stops 7 integral with the frame 3 and whose vertical position can be adjusted. These adjustable stops can be of the wedge type or of the screw jack type or of any other equivalent type. These stops are adjusted by the operator so that the interval between the upper roller and the lower roller is slightly less than the thickness of the metal strip. The bearings 52 of the upper roller are applied against the stops 7 with an application force which is greater than the maximum separation force generated between the two drive rollers so as to create a preload of the elements associated with each bearing.

Chaque bâti 3 est équipé d'un vérin hydraulique qui est repéré dans son ensemble par la référence 1. Chacun de ces vérins comprend un cylindre 11 s'appyant sur le bâti 3 et un piston 12 qui est solidaire d'une tige 13 sur laquelle repose un palier 42 du rouleau inférieur. Le piston délimite, du côté de sa face inférieure et du fond du cylindre, une chambre inférieure 14 qui est alimentée par un conduit 15. La mise en pression de cette chambre 14 déplace verticalement le piston 12 vers le haut.Each frame 3 is equipped with a hydraulic cylinder which is identified as a whole by the reference 1. Each of these cylinders comprises a cylinder 11 resting on the frame 3 and a piston 12 which is integral with a rod 13 on which rests a bearing 42 of the lower roller. The piston delimits, on the side of its lower face and the bottom of the cylinder, a lower chamber 14 which is supplied by a conduit 15. The pressurization of this chamber 14 moves the piston 12 vertically upwards.

Chaque vérin est équipé de moyens capables de déplacer la fin de course du piston vers le haut. A cet effet chaque vérin comprend une bague 16 qui est logée du côté tige dans le cylindre de manière à limiter la course du piston 12 vers le haut. Chaque bagué 16 peut coulisser avec étanchéité sur la tige 13 qui traverse elle-même avec étanchéité le cylindre 11. Par ailleurs cette bague 16 peut coulisser avec étanchéité dans l'alésage du cylindre 11 de manière à former une chambre annulaire étanche 17 du côté de sa face supérieure. Cette chambre annulaire 17 qui entoure la tige 13 est connectée à une conduite d'alimentation en liquide hydraulique 18. La bague 16 est susceptible d'être appliquée en position basse contre une butée qui définit une fin de course basse limitant la course du piston vers le haut. Cette butée est constituée par le fond du cylindre 11. La bague 16 a une forme en cloche qui lui permet de venir buter contre le fond du cylindre 11 lorsque la chambre 17 est mise en pression. Du fait de la forme en cloche de la bague 16, le diamètre du piston 12 est inférieur au diamètre de l'alésage intérieur du cylindre 11. Le piston 12 est libre de se déplacer à l'intérieur de la bague 16 dont la colerette supérieure peut s'appliquer contre l'épaulement formé par le piston et sa tige. Le diamètre de la chambre inférieure 14 est de préférence inférieur au diamètre du piston 12. La surface annulaire de la bague, du côté de la chambre annulaire 17, est supérieure à la surface d'application de la pression dans la chambre 14 située au-dessous de la face inférieure du piston, c'est-à-dire à la surface d'une section horizontale. De ce fait, lorsque les chambres 17 et 14 sont alimentées sous des pressions égales, la bague 16 est appliquée contre le fond inférieur du cylindre 11.Each cylinder is equipped with means capable of moving the end of travel of the piston up. For this purpose each cylinder comprises a ring 16 which is housed on the rod side in the cylinder so as to limit the stroke of the piston 12 upwards. Each ring 16 can slide with seal on the rod 13 which itself crosses the cylinder 11 with seal. Furthermore, this ring 16 can slide with seal in the bore of the cylinder 11 so as to form a sealed annular chamber 17 on the side of its upper side. This annular chamber 17 which surrounds the rod 13 is connected to a hydraulic fluid supply line 18. The ring 16 can be applied in the low position against a stop which defines a low end limit limiting the stroke of the piston towards the top. This stop is constituted by the bottom of the cylinder 11. The ring 16 has a bell shape which allows it to abut against the bottom of the cylinder 11 when the chamber 17 is pressurized. Due to the bell shape of the ring 16, the diameter of the piston 12 is less than the diameter of the inner bore of the cylinder 11. The piston 12 is free to move inside the ring 16 including the upper flange can be applied against the shoulder formed by the piston and its rod. The diameter of the lower chamber 14 is preferably less than the diameter of the piston 12. The annular surface of the ring, on the side of the annular chamber 17, is greater than the surface for applying pressure in the chamber 14 located above below the underside of the piston, i.e. on the surface of a horizontal section. Therefore, when the chambers 17 and 14 are supplied under equal pressures, the ring 16 is applied against the lower bottom of the cylinder 11.

Le circuit hydraulique représenté par la figure 2 comporte un distributeur électrohydraulique 20 qui contrôle l'alimentation en liquide hydraulique de la chambre supérieure 17 à partir de la conduite d'alimentation 23. Un régulateur de pression 21 dont la commande est à la disposition de l'opérateur modifie la pression du liquide hydraulique entre la conduite d'alimentation 23 située en amont et la conduite 15 débouchant dans la chambre inférieure 14. Un amortisseur hydraulique 19 est branché sur la conduite 15 située en aval du régulateur de pression 21.The hydraulic circuit represented by FIG. 2 comprises an electro-hydraulic distributor 20 which controls the supply of hydraulic liquid to the upper chamber 17 from the supply line 23. A pressure regulator 21 the control of which is available to the the operator modifies the pressure of the hydraulic fluid between the supply line 23 located upstream and the line 15 opening into the lower chamber 14. A hydraulic damper 19 is connected to the line 15 located downstream of the pressure regulator 21.

Le fonctionnement du dispositif d'entraînement va maintenant être expliqué en se référant aux figures 1 et 2.The operation of the drive device will now be explained with reference to Figures 1 and 2.

Avant l'engagement de la bande métallique entre les rouleaux, le rouleau inférieur 4 se trouve en position basse et fixe. Cette position est chenue en mettant sous pression les chambres 14 et 17. Du fait que les pressions dans ces chambres sont égales et que la surface d'application dans la chambre 17 est supérieure à la surface d'application dans la chambre 14, la bague 16 se trouve en butée contre le fond inférieur du cylindre 11. Le piston 12 est appliqué contre la collerette de la bague 16. La position du rouleau supérieur 5 est réglée par les butées 7.Before the engagement of the metal strip between the rollers, the lower roller 4 is in the low and fixed position. This position is lowered by putting the chambers 14 and 17 under pressure. Because the pressures in these chambers are equal and the surface of ap plication in the chamber 17 is greater than the surface of application in the chamber 14, the ring 16 is in abutment against the lower bottom of the cylinder 11. The piston 12 is applied against the collar of the ring 16. The position of the roller upper 5 is adjusted by the stops 7.

Lors de l'engagement de la bande métallique entre les rouleaux, les paliers 52 du rouleau supérieur restentappliqués contre les butées 7. Les paliers 42 du rouleau inférieur peuvent alors se déplacer légèrement vers le bas en repoussant le piston 12 et en refoulant et ou en comprimant le liquide dans la chambre 14. L'ensemble mobile formé par le rouleau inférieur et par ses paliers est plus léger que l'ensemble mobile formé par le rouleau supérieur et ses paliers. De ce fait, les effets néfastes dûs aux chocs causés par l'introduction de la bande sont relativement réduits.When the metal strip is engaged between the rollers, the bearings 52 of the upper roller remain applied against the stops 7. The bearings 42 of the lower roller can then move slightly downwards by pushing the piston 12 and pushing back and or by compressing the liquid in the chamber 14. The mobile assembly formed by the lower roller and by its bearings is lighter than the mobile assembly formed by the upper roller and its bearings. As a result, the harmful effects due to the shocks caused by the introduction of the strip are relatively reduced.

Dès que la bande métallique s'est introduite entre les rouleaux entraineurs, la pression dans la chambre annulaire 17 est supprimée à l'aide du distributeur 20. De ce fait la bague 16 est libre de se déplacer à l'intérieur du cylindre 17 et elle peut donc monter jusqu'à venir buter contre le fond supérieur -côté tige- du cylindre. La course du piston 12 est donc augmentée de la course de la bague 16. La mise en pression de la chambre supérieure 17 correspond à une fin de course basse limitant la course du piston vers le haut. Au contraire la supression de la mise en pression de la chambre supérieure 17 correspond à une fin de course haute limitant la course du piston vers le haut. Le rouleau inférieur 4 est appliqué sur la bande métallique avec une force correspondant à la pression régnant dans la chambre 14. Cette préssion est constante mais elle est réglable par l'opérateur en fonction des caractérie- tiques dimensionnelles de la bande 2. Ce réglage de la pression dans la chambre'14 peut être obtenu à l'aide du régulateur de pression 21. La pression peut être réglée différemment entre les vérins situés du côté droit et du côté gauche de la bande de façon à compenser les défauts de symétrie éventuels dans le dispositif d'entrainement ou dans le guidage de la bande.As soon as the metal strip has been introduced between the driving rollers, the pressure in the annular chamber 17 is removed using the distributor 20. Therefore the ring 16 is free to move inside the cylinder 17 and it can therefore go up to come up against the upper bottom - rod side - of the cylinder. The stroke of the piston 12 is therefore increased by the stroke of the ring 16. The pressurization of the upper chamber 17 corresponds to a low end of stroke limiting the stroke of the piston upwards. On the contrary, the removal of the pressurization of the upper chamber 17 corresponds to a high end limit limiting the stroke of the piston upwards. The lower roller 4 is applied to the metal strip with a force corresponding to the pressure prevailing in the chamber 14. This pressure is constant but it is adjustable by the operator as a function of the dimensional characteristics of the strip 2. This setting of the pressure in chamber'14 can be obtained using the pressure regulator 21. The pressure can be adjusted differently between the cylinders located on the right and left side of the strip so as to compensate for any symmetry defects in the drive device or in guiding the strip.

Lorsque la fin de la bande métallique 2 quitte les rouleaux entraineurs, la chambre annulaire 17 est de nouveau mise sous pression par manoeuvre du distributeur 20 de manière à positionner le rouleau inférieur dans sa position d'attente fixe.When the end of the metal strip 2 leaves the driving rollers, the annular chamber 17 is again pressurized by maneuvering the distributor 20 so as to position the lower roller in its fixed waiting position.

Il est bien entendu que l'on peut sans sortir du cadre de l'invention imaginer des variantes et des perfectionnements de détail et de même envisager l'emploi de moyens équivalents.It is understood that one can without departing from the framework of in vention imagine variations and refinements of detail and even consider the use of equivalent means.

Claims (5)

1.- Dispositif d'entrainement de bande comprenant un bâti qui guide des paliers montés aux extrémités de deux rouleaux entraineurs de manière que les axes de ces rouleaux se déplacent relativement dans un plan vertical, le rouleau supérieur étant déplacé par des moyens moteurs, caractérisé par le fait que les paliers du rouleau supérieur sont appliqués par lesdits moyens moteurs contre des butées fixes et par le fait qu'il comprend des vérins (1) dont les pistons (12) supportent les paliers (42) du rouleau inférieur (4) et sont déplacés verticalement par la mise en pression des chambres (14) situées côté fond, chacun de ces vérins (1) étant équipé de moyens (16-17-18) capables de déplacer la fin de course dudit piston (13) vers le haut.1.- Belt drive device comprising a frame which guides bearings mounted at the ends of two driving rollers so that the axes of these rollers move relatively in a vertical plane, the upper roller being moved by motor means, characterized by the fact that the bearings of the upper roller are applied by said drive means against fixed stops and by the fact that it comprises jacks (1) whose pistons (12) support the bearings (42) of the lower roller (4) and are moved vertically by the pressurization of the chambers (14) located on the bottom side, each of these jacks (1) being equipped with means (16-17-18) capable of moving the end of travel of said piston (13) towards the high. 2.- Dispositif d'entrainement selon la revendication 1, caractérisé par le fait que les moyens capables de déplacer la fin de course vers le haut du piston (12) comprennent une bague (16) logée du côté tige dans le cylindre (11) de manière à limiter la course 'dudit piston (12) vers le haut et ménageant une chambre supérieure annulaire (17) connectée à une conduite d'alimentation (18) en liquide hydraulique, cette bague étant susceptible d'être appliquée en position basse contre une butée (11) définissant une fin de course basse limitant la course du piston (12) vers le haut.2.- Drive device according to claim 1, characterized in that the means capable of moving the end of stroke up the piston (12) comprise a ring (16) housed on the rod side in the cylinder (11) so as to limit the stroke 'of said piston (12) upwards and providing an annular upper chamber (17) connected to a supply line (18) with hydraulic liquid, this ring being capable of being applied in the low position against a stop (11) defining a low end limit limiting the stroke of the piston (12) upwards. 3.- Dispositif d'entrainement selon l'une quelconque des revendications précédentes, caractérisé par le fait que la bague (16) est constituée par une cloche dans laquelle coulisse le piston (12).3.- Drive device according to any one of the preceding claims, characterized in that the ring (16) consists of a bell in which the piston (12) slides. 4.- Dispositif d'entrainement selon l'une quelconque des revendications précédentes, caractérisé par le fait que la surface annulaire de la bague (16) est supérieure à la surface d'une section horizontale de la chambre (1) située au-dessous de la face inférieure du piston.4. A drive device according to any one of the preceding claims, characterized in that the annular surface of the ring (16) is greater than the surface of a horizontal section of the chamber (1) located below from the underside of the piston. 5.- Dispositif d'entrainement selon l'une quelconque des revendications précédentes, caractérisé par le fait que chaque palier (42) du rouleau inférieur (4) est associé à un vérin hydraulique (1) dans lequel la chambre (14) située sous le piston (12) est connectée à un amortisseur et à un organe de régulation de la pression d'alimentation.5.- Drive device according to any one of the preceding claims, characterized in that each bearing (42) of the lower roller (4) is associated with a hydraulic cylinder (1) in which the chamber (14) located under the piston (12) is connected to a damper and to a member for regulating the supply pressure.
EP19800400899 1979-06-26 1980-06-18 Driving device for wide strip Expired EP0021995B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7916350 1979-06-26
FR7916350A FR2459692A1 (en) 1979-06-26 1979-06-26 BAND DRIVING DEVICE

Publications (2)

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EP0021995A1 true EP0021995A1 (en) 1981-01-07
EP0021995B1 EP0021995B1 (en) 1983-07-13

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EP19800400899 Expired EP0021995B1 (en) 1979-06-26 1980-06-18 Driving device for wide strip

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EP (1) EP0021995B1 (en)
DE (1) DE3064116D1 (en)
ES (1) ES8102859A1 (en)
FR (1) FR2459692A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192982A2 (en) * 1985-03-01 1986-09-03 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for advancing rolled strip
US4748840A (en) * 1985-08-20 1988-06-07 Mannesmann Ag Fastening a hydraulic drive in roll stands
EP0721813A1 (en) * 1995-01-16 1996-07-17 MANNESMANN Aktiengesellschaft Device for guiding hot-rolled strip through an inductor
EP1226886A1 (en) * 2001-01-30 2002-07-31 Vai Clecim System for driving and guiding a metal band
CN101733286B (en) * 2008-11-04 2012-10-03 上海重型机器厂有限公司 Device for adjusting rolling line level of medium plate mill and adjusting method thereof
CN117282899A (en) * 2023-11-27 2023-12-26 山西恒冠重工集团有限公司 Forging and pressing device for flange machining

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2796781A (en) * 1953-11-09 1957-06-25 Aetna Standard Eng Co Roll adjusting mechanism
FR85442E (en) * 1960-03-14 1965-08-06 Moeller & Neumann Verwalt Ges Hydraulic positioning device for rolling mills
FR1539009A (en) * 1967-05-22 1968-09-13 Spidem Ste Nle Development of cylinders and applications
DE2059711A1 (en) * 1970-02-19 1971-08-26 Gulf & Western Ind Prod Co Device for winding strip material, in particular heavy plates and the like.
FR2281799A1 (en) * 1974-08-13 1976-03-12 Hoesch Werke Ag TWO ROLLER DRIVE MACHINE FOR STRIP WINDER
FR2371976A1 (en) * 1976-11-26 1978-06-23 Schloemann Siemag Ag TWO ROLLER DRIVE DEVICE FOR BELT SPOOLER

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2796781A (en) * 1953-11-09 1957-06-25 Aetna Standard Eng Co Roll adjusting mechanism
FR85442E (en) * 1960-03-14 1965-08-06 Moeller & Neumann Verwalt Ges Hydraulic positioning device for rolling mills
FR1539009A (en) * 1967-05-22 1968-09-13 Spidem Ste Nle Development of cylinders and applications
DE2059711A1 (en) * 1970-02-19 1971-08-26 Gulf & Western Ind Prod Co Device for winding strip material, in particular heavy plates and the like.
FR2281799A1 (en) * 1974-08-13 1976-03-12 Hoesch Werke Ag TWO ROLLER DRIVE MACHINE FOR STRIP WINDER
FR2371976A1 (en) * 1976-11-26 1978-06-23 Schloemann Siemag Ag TWO ROLLER DRIVE DEVICE FOR BELT SPOOLER

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192982A2 (en) * 1985-03-01 1986-09-03 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for advancing rolled strip
EP0192982A3 (en) * 1985-03-01 1989-03-29 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for advancing rolled strip
US4748840A (en) * 1985-08-20 1988-06-07 Mannesmann Ag Fastening a hydraulic drive in roll stands
EP0721813A1 (en) * 1995-01-16 1996-07-17 MANNESMANN Aktiengesellschaft Device for guiding hot-rolled strip through an inductor
EP1226886A1 (en) * 2001-01-30 2002-07-31 Vai Clecim System for driving and guiding a metal band
FR2820061A1 (en) * 2001-01-30 2002-08-02 Vai Clecim DEVICE FOR DRIVING AND GUIDING A BELT
CN101733286B (en) * 2008-11-04 2012-10-03 上海重型机器厂有限公司 Device for adjusting rolling line level of medium plate mill and adjusting method thereof
CN117282899A (en) * 2023-11-27 2023-12-26 山西恒冠重工集团有限公司 Forging and pressing device for flange machining
CN117282899B (en) * 2023-11-27 2024-02-02 山西恒冠重工集团有限公司 Forging and pressing device for flange machining

Also Published As

Publication number Publication date
DE3064116D1 (en) 1983-08-18
FR2459692B1 (en) 1982-09-24
FR2459692A1 (en) 1981-01-16
ES492749A0 (en) 1981-02-16
ES8102859A1 (en) 1981-02-16
EP0021995B1 (en) 1983-07-13

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