EP3849720B1 - Système de récupération de lubrifiant et de protection pour raccords à broche - Google Patents

Système de récupération de lubrifiant et de protection pour raccords à broche Download PDF

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Publication number
EP3849720B1
EP3849720B1 EP19805393.6A EP19805393A EP3849720B1 EP 3849720 B1 EP3849720 B1 EP 3849720B1 EP 19805393 A EP19805393 A EP 19805393A EP 3849720 B1 EP3849720 B1 EP 3849720B1
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EP
European Patent Office
Prior art keywords
wall
casing
couplings
lubricant
spindle
Prior art date
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EP19805393.6A
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German (de)
English (en)
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EP3849720A1 (fr
Inventor
Morris CODARIN
Andrea Donadon
Carlo Mattanza
Gianni TIUSSI
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Danieli and C Officine Meccaniche SpA
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Danieli and C Officine Meccaniche SpA
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Publication of EP3849720A1 publication Critical patent/EP3849720A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • B21B35/147—Lubrication of spindle couplings

Definitions

  • the invention relates to a lubricant recovery system to be used for spindle couplings, in particular for couplings which connect a spindle to the respective working roll and which are part of a reversible rolling unit, as well as a protection system of said couplings from the external environment.
  • the invention finds application in roller stands where the mutual distance between the working rolls may have to vary.
  • a lubricant recovery and protection system and and a protective casing according to the preamble of claim 12 is for example known from DE 197 11 609 A1 .
  • Another lubricant recovery and protection system according to the preamble of claim 1, but with two separate oil collecting receptacles, is known from US 7,383,712 B2 .
  • the rolling mill is a set of hot or cold rolling and/or forming units (or stands) for malleable materials, in particular for metals.
  • Each unit is composed of a set of rollers that progressively press a semi-finished product, giving it the desired shape and dimensions.
  • the rollers can be of various shapes and sizes: smooth and cylindrical for the production of flat rolled products, shaped for the production of bars, angles and long products in general.
  • the product rolling process involves applying permanent plastic deformations by the action of appropriate forces applied by the rolling cylinders to the product, which are reflected in the structure of the material.
  • the rolling of the semi-finished steel products is generally carried out at high temperatures so as to reduce the stresses on the equipment: for example, the steel comes from the continuous casting machine or exits the heating furnace around 1100 °C, but cools around 900 °C by convection before the rolling begins; during rolling, the crushing work heats the material, compensating for its rapid cooling. For particular types of steel, subsequent cold rolling follows.
  • the roller stands which make up the rolling mill consist essentially of two or more cylinders generally with parallel axes, which are moved so as to be counter-rotating, between which the piece to be worked is passed.
  • the roller stands which make up the rolling mill consist essentially of two or more cylinders generally with parallel axes, which are moved so as to be counter-rotating, between which the piece to be worked is passed.
  • four-high stands consisting of four rolls
  • the cylinders In order for the cylinders to grasp the product and process it, it is necessary that certain proportions exist between the diameter of the cylinders, the distance (or gap) between them and the dimensions of the product.
  • the cylinders are supported by frames called shoulders, which define the roller stand; the set of several stands destined to subsequent rolling
  • the rolling mills can be reversible or unidirectional (so-called tandem trains).
  • reversible rolling mills the material is rolled alternately in one direction and then in the other, sliding back and forth between the working rolls until the desired degree of reduction is obtained. In this case, the distance between the working rolls is progressively reduced with each pass.
  • the product passes completely through the working rolls of the first stand set to a gap G1, while it is still partially gripped it begins to pass in the second stand set to a gap G2 smaller than G1, thus decreasing its thickness.
  • the leading end of the product coming out of the second stand is then wrapped in a reel.
  • the process is reversed: the trailing end (which becomes the leading end) passes again through the second stand set to a gap G3 smaller than G2 and then to G4 smaller than G3, to be wound again on a second reel.
  • the process is repeated for the number of times sufficient to obtain the desired thickness.
  • the product then leaves the rolling mill train to continue towards the downstream machines.
  • the product being processed passes completely downstream of the stand and is rolled by the working rolls spaced to define a first slot or a first gap G1 and re-rolled again going back upstream in the opposite direction from the same working rolls set to a second slot or a second gap G2 lower than said first gap G1 (G2 ⁇ G1).
  • the product steps in the gap of the reversible stand can continue several times until reaching the desired thickness, providing to have the gap between working rolls decreasing at each step.
  • unidirectional rolling mills are arranged in series and each stand contributes in part to the reduction in a gap decrease from stand to stand.
  • the working rolls are connected with special couplings to spindles which in turn are connected to mandrels which are actuated, directly or indirectly through reducers, by one or more motors to rotate the spindle-coupling-working roll system.
  • the couplings that connect the working rolls to the spindles deriving from the drive system must provide effective lubrication to preserve their life over time.
  • the lubricants usually grease, are disposed of, since they tend to accumulate particles deriving from wear and be soiled by contact with the external environment, for example by dust, rolling flakes and water from the cooling of the roller stands. Furthermore, their lubricating power is not among the best but it is a good compromise between quality and price.
  • the amount of grease used and lost during rolling can also amount to over 120 g/h for each coupling: it is easy to see that in a continuous lamination, this amounts to over 4 kg/day per stand, with the disposal costs associated with this loss.
  • such couplings, as well as the lubricant associated with them are not protected from dust, humidity or external aggressors. A protection of these couplings is desirable, but is made difficult by the rotating movement of the spindle-coupling-working roll system; in addition to that, the distance between the working rolls and, therefore, between the couplings of the spindles, is variable.
  • the reversible roller stands are characterized by a large distance between the maximum and minimum aperture positions of the working rolls or work rolls.
  • the distance between centrelines between the rolls in contact with the material to be rolled is variable.
  • the couplings that transfer the motion through the spindles from the motor to the working rolls and the spindles connected to them must make a very high excursion, substantially corresponding to that of the maximum-minimum gap that is obtained between the rolls.
  • the invention aims to overcome the aforementioned drawbacks and to propose a system that allows the recovery and reuse of the lubricant used for the couplings between working rolls and spindles in rolling mills, in particular with the continuous application of a lubricant at the coupling between spindles and working rolls, so as to extend the life, reducing the wear of these components and in order to possibly protect the lubricant and the couplings from dust, cooling water and other external agents.
  • Another object of the invention is to provide a system for recovering and protecting the lubricant which allows the rotary movement of the protected parts, and in particular for reversible rolling mills also allows a change in the distance between centrelines of the working rolls and therefore of the gap between the couplings.
  • a lubricant recovery and protection system for spindle couplings for reversible roller stands comprising
  • the proposed system encloses in the casing the parts affected by lubrication, and protects them together with the used lubricant from external agents and prevents the loss of the lubricant that remains inside the casing. Thanks to the protection and recovery of the lubricant according to the invention, even the use of more valuable lubricants, such as lubricating oils, which are more effective in the lubrication of the couplings, is no longer a problem from the economic point of view since the oil can be recovered inside the casing and protected from external agents and therefore be reused.
  • the lubricant is therefore preferably a lubricating oil.
  • said casing ensures protection according to the international class as defined in the IEC 60529 standard of at least IP 24.
  • This system according to the invention is suitable for any type of couplings between spindles and working rolls, and this for rolling mills of the reversible type as well as of the continuous type, the latter having a constant mutual distance between the working rolls of each roller stand.
  • these are guide shoe spindles.
  • the coupling can connect the spindle directly to the working roll as well as indirectly through components connected to the working roll (or even to the spindle).
  • Such components can be, for example, necks located at the ends of the roll which, in turn, at least in the case of the end that connects to the spindle, are inserted in respective housings or flanges which are part of the coupling itself or are connected to it.
  • Parts of the unit that can pass through the walls of the casing are the spindles or parts of them, parts of the working roll or components that connect it to the coupling or parts of the coupling itself, particularly if they are parts that do not require lubrication or particular protection, such as flanges for the necks of the working rolls that are integrated into the couplings.
  • the casing can therefore also contain parts of the spindles or the connected working rolls, such as for example the necks.
  • the case of partial containment of the coupling can, for example, occur if the casing contains the part of the coupling that realizes the actual connection and therefore the contact between two connected pieces, which also needs lubrication, but does not contain all the parts of the coupling.
  • Parts which serve as a housing for the working roller or a neck thereof may be located outside the casing.
  • the two opposite walls of the casing affected by the passage of spindles or components of the working rolls are advantageously provided for this purpose with respective apertures which allow a rotation of the spindles and rolls inside the corresponding aperture.
  • Individual openings can be provided for each spindle or working roll or aperture, for example in the form of slots, which allow a plurality of spindles or a plurality of working rolls to pass.
  • the rolling mill with which the casing is associated is a reversible rolling mill
  • the gap between the rolls and consequently the distance between the couplings is variable and at least one of the couplings with respective spindle and respective working roll is variable in height.
  • the height dimension is defined by the direction determined by the aforementioned distance. This height adjustability can be achieved because of the fact that the upper coupling with respective spindle and respective working roll is variable in height, or in that the lower coupling with respective spindle and respective working roll is variable in height or because of the fact that both the couplings with respective spindles and respective working rolls vary in height.
  • the casing comprises in the respective wall for each part of the connecting unit passing in the casing a wall element with said aperture for containing the passing part of said connecting unit wherein at least one wall element of the spindle side and the respective wall element of the working roll side is variable in height and thus moveable in the direction that defines the distance between the two wall elements arranged one above the other to follow the distance variation between spindles and working rolls.
  • the respective wall has guides on its sides, inside which guide shoes or respective profiles created on the side edges of the wall elements slide.
  • each aperture is made of antifriction material and/or includes at the edges of the aperture at least two sliding rolls projecting into the aperture to facilitate the rotation of the cylindrical element, spindle or working roll.
  • deformable elements are provided in positions where the distance between a moveable wall element and another wall element or between a wall element and the upper/lower part of the wall can vary.
  • the protection contains two couplings and only one of the two couplings is variable in height, there will be a deformable element between the two wall elements arranged one above the other and between the upper or lower part of the wall near the moveable part element, while it is not necessary to arrange a deformable element between the fixed wall element and the respective upper or lower part of the wall.
  • both couplings are movable, deformable elements are provided between the wall elements and between the upper wall element and the upper part of the wall and between the lower wall element and the lower part of the wall.
  • Deformable elements of different kinds are conceivable: elements folded like a squeezebox or creasable elements as known from bellows, shutter elements, elastic (reversibly) expandable polymeric materials.
  • the preferred variant for the deformable element is an element folded like a squeezebox or in other words a zig-zag-folded or Leporello-fold element, like a polymeric sheet.
  • An element folded in this manner allows a practically perfect reversible and repeated compression and expansion of the deformable element.
  • the combination of movable wall elements and deformable elements allows for the casing applied to the reversible rolling mills an airtight seal with a protection degree of at least IP 24.
  • inclinations made possible with spherical or wedge joints on the spindles support and simplify the adaptation of the distance between the couplings or of the slot between the working rolls and the inclination of the spindle to ensure their correct connection to the drive systems.
  • the casing comprises a device for lubricating the couplings with a lubricant.
  • These devices advantageously relate to the external lubrication of the couplings; moreover an internal lubrication can be managed by a flow of a lubricant coming from the inside of the spindles.
  • the oil recovery system according to the invention thus also allows continuous lubrication of the couplings.
  • the casing is provided with an outlet for the lubricant collected in the casing.
  • the casing can be provided with a tray on its bottom, an inclination of the bottom or a recess in the bottom for lubricant discharge, so as to be able to recover it easily.
  • Another aspect of the invention relates to a roller stand or a rolling mill train which comprises one or more lubricant recovery and protection systems according to the invention.
  • a further aspect of the invention relates to a method for continuous lubrication and protection of spindle couplings which comprises the following steps:
  • the invention also relates to a method for varying the slot between the working rolls in a roller stand and simultaneously protecting the couplings connecting the spindles to the working rolls.
  • a lubricant recovery and protection system according to the invention is provided which allows the height adjustment of the spindles and of the working rolls.
  • the compression step of the deformable element between the respective spindles arranged one above the other and between the respective working rolls arranged one above the other expanding simultaneously the other deformable elements present in the same wall and, in the case of distance increase, the step of expanding the deformable element between the respective spindles arranged one above the other and between the respective working rolls arranged one above the other compressing simultaneously the other deformable elements present in the same wall are added.
  • This method can be combined with the lubrication method described above, allowing lubrication even in the case of reversible rolling mills.
  • a last aspect of the invention relates to a protective casing which comprises at least two apertures arranged one above the other in each of two opposite walls of the casing forming a pair of opposite upper apertures and a pair of opposite lower apertures wherein each aperture is located in a wall element and wherein at least one pair of opposite wall elements is moveable in height inside the wall, preferably sliding with respective guide shoes or profiles inside of guides provided in the side edges of the respective side of the casing, and wherein the wall is formed in the parts affected by the movement of the wall elements of deformable material.
  • Fig. 1 shows a cross-section of a reversible rolling assembly comprising two roller stands 2 .
  • Each stand 2 is equipped with two working rolls 6 (or work rolls) that define a slot 8 (or gap) between them to pass the material to be rolled.
  • the backup rolls 4 preferably of larger diameter, externally support the two working rolls 6 in contact with the material to be processed.
  • Two upstream 10a and downstream 10b reels wrap and unwrap the product to be rolled allowing the evacuation of the same from the stands 2 between one rolling step and the following one, to allow adjustment of the slots 8 in such a way that the thick product can become thinner through the successive steps between the stands 2 .
  • these two reels can be contained in heated ovens.
  • Fig. 2 shows a side view of a four-roll roller stand according to the state of the art.
  • two working rolls 16 supported by a frame 19 and defining a gap 18 between them can be observed.
  • Two backup rolls 17 of larger diameter externally support the two working rolls 16 in contact with the material to be processed.
  • the two rolls 16 are connected through respective couplings 11 to spindles 14 which in turn are connected by means of respective couplings to pinions or shafts inside a reducer and/or splitter 13 powered by a motor 15 .
  • the couplings 11 are lubricated and in the state of the art they are not protected from dust or other external agents.
  • FIG. 3 illustrates, in a perspective view, an exemplary embodiment of a lubricant recovery and protection system according to the invention.
  • a casing 120 contains two couplings (not visible) that connect each a spindle 114a , 114b to the respective working roll or to the flange 116 a, 116b which directly accommodates the neck of the working roll and protects them from external agents such as dust and prevents the loss of lubricating oil used to lubricate the couplings that is collected inside the casing 120 .
  • Every flange 116a , 116b accommodates the neck of the working roll and is rotatably housed within a wall element 122a , 122b with a ring aperture.
  • Respective rings are also found on the opposite side of the casing 120 to allow the passage of the spindle-coupling-roll systems which form a connecting unit. Between the housings 116a , 116b there is a slot or a gap 118 whose height is variable according to the needs.
  • the casing 120 is equipped with two shutters i.e. two sheets folded in a zig-zag pattern, an upper one 124a between the upper part of the casing 120 and the ring 122a and an lower one 124b located between the two rings 122a and 122b .
  • Fig. 4 shows an enlarged detail of figure 2 highlighting the casing 120 with bellows-shaped sides.
  • the zig-zag folded sheet 124b is expanded, while the other 124a is compressed.
  • the wall elements 122a is 122b include gaskets 126 in the passage, i.e. in the rings for the flanges 116a and 116b .
  • each wall element 122a and 122b are housed in side guides 128 of the wall of the casing 120 containing the bellows-shaped system allowing the up and down movement of the wall elements in adjustment of the distance between centerlines between the essentially parallel working rolls.
  • each wall element preferably has ( fig. 6 ) side guide shoes 132 which can be made to slide vertically along these guides so as to accommodate the mutual approach/departure movement between the working rolls while allowing the rotation of the corresponding spindle.
  • Fig. 5 shows a sectional view of the casing 120 for protection of the couplings 111a , 111b between the spindles 114a , 114b and the respective flange 116a , 116b for the working roll.
  • a spindle-coupling-roller unit in which the couplings 111a , 111b between spindle and roller, i.e. its corresponding housing are enclosed in the casing 120 .
  • the opposite walls of the casing comprise, as already described with reference to fig. 4 , two zig-zag folded sheets to allow the variation of the distance between the spindles or between the working rolls.
  • an outlet 130 is provided to extract the lubricant collected on the bottom to then reuse it.
  • Fig. 6 shows a perspective view of a wall element with a ring for the passage of the spindles or of the working rolls, i.e. of their housings in the form of flanges in the casing as shown in figures 3 to 5 .
  • Each ring includes sliding rolls 134 which protrude slightly from the surface of the aperture to facilitate the rotation of the spindle or the working roll (not shown) passing through the ring.
  • said sliding rolls 134 can be four.
  • the lower working roll i.e. its flange 116b with the corresponding spindle 114b remains set at a fixed height, while only the upper counterpart 116a with attached motion transfer devices is moved in approach/departure.
  • the sides of the casing 120 there should be least two deformable shutter-shaped elements 124a , 124b and 124c , 124d for each wall, made of a plastic material suitable for folding on itself with zig-zag folds.
  • the first part of this tent is connected between the upper edge of the casing 120 and the upper part of the upper wall element 122a , 122c while the lower part of the shutter 124b , 124d is connected between the lower edge of the upper wall element 122a , 122c and the upper edge of the lower wall element 122b , 122d.
  • Said upper shutter 124a , 124c therefore extends to maximum tension when the lower and upper wall elements are spaced at the minimum gap between working rolls and vice versa the lower one 124b , 124d in this configuration is compressed to a minimum.
  • the gap between the wall elements 122a and 122b and between 122c and 122d (and therefore the working rolls) increases, the lower shutter 124b , 124d stretches and the upper one 124a , 124c contracts.
  • the lubricant is sprayed directly on the connecting couplings between the working rolls and spindles (as well as injected inside them) with known systems, below the casing 120 a container or a funnel system can be arranged to allow the lubricating oil to flow out for subsequent recovery.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Lubricants (AREA)

Claims (13)

  1. Système de récupération de lubrifiant et de protection pour des accouplements de broche (111a, 111b) pour des cages de laminoir réversibles comprenant
    (a) au moins deux accouplements (111a, 111b) qui sont disposés l'un au-dessus de l'autre, chacun d'eux reliant une broche (114a, 114b) et un cylindre de travail formant des unités de connexion respectives et qui définissent une distance entre eux en corrélation avec une fente respective (118) entre lesdits cylindres de travail,
    dans lequel ladite fente (118) et par conséquent ladite distance sont variables et dans lequel au moins l'un desdits accouplements (111a, 111b) avec la broche respective (114a, 114b) et le cylindre de travail respectif est variable en hauteur de sorte que :
    (i) l'accouplement supérieur (111a) avec sa broche respective (114a) et son cylindre de travail respectif est variable en hauteur; et/ou
    (ii) l'accouplement inférieur (111b) avec sa broche respective (114b) et son cylindre de travail respectif soit variable en hauteur; caractérisé en ce que le système de récupération du lubrifiant et de protection comprend en outre
    (b) un boîtier (120) dans lequel lesdits accouplements (111a, 111b) sont logés au moins partiellement de sorte que lesdites broches (114a, 114b) et lesdits cylindres de travail puissent tourner et dans lequel dans deux parois opposées du boîtier (120) des ouvertures sont prévues pour le passage des parties respectives de l'unité de connexion entrant dans le boîtier (120),
    dans lequel ledit boîtier (120) comprend dans la paroi respective pour chaque partie de l'unité de connexion passant dans le boîtier (120) un élément de paroi (122a, 122b, 122c, 122d) avec ladite ouverture pour contenir la partie passante de ladite unité de connexion, dans lequel au moins un élément de paroi (122c, 122d) du côté de la broche (114a, 114b) et l'élément de paroi respectif du côté du cylindre de travail est variable en hauteur et donc mobile dans la direction qui définit la distance entre les deux éléments de paroi (122a, 122b ; 122c, 122d) disposés l'un au-dessus de l'autre.
  2. Système de récupération de lubrifiant et de protection selon la revendication 1, dans lequel
    (I) entre deux éléments de paroi (122a et 122b, 122c et 122d) disposés l'un au-dessus de l'autre est disposé un premier élément déformable (124b, 124d); et dans lequel
    (II) entre la partie supérieure de la paroi contenant lesdits éléments de paroi (122a, 122b; 122c, 122d) et/ou la partie inférieure de la paroi contenant lesdits éléments de paroi (122a, 122b ; 122c, 122d) et l'élément de paroi mobile consécutif (122a, 122c) est disposé un autre élément déformable (124a, 124c).
  3. Système de récupération de lubrifiant et de protection selon la revendication 2 caractérisé en ce que ledit élément déformable (124a et 124b, 124c et 124d) est un élément plié comme un accordéon.
  4. Système de récupération de lubrifiant et de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites ouvertures sont réalisées en matériau antifriction et/ou comprennent dans les bords de l'ouverture au moins deux cylindres de glissement (134) faisant saillie dans l'ouverture.
  5. Système de récupération de lubrifiant et de protection selon l'une quelconque des revendications précédentes caractérisé en ce que ledit boîtier (120) comprend un dispositif de lubrification desdits accouplements (111a, 111b) avec un lubrifiant.
  6. Système de récupération de lubrifiant et de protection selon la revendication 5, caractérisé en ce que ledit boîtier (120) est muni d'une sortie (130) pour ledit lubrifiant.
  7. Système de récupération de lubrifiant et de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi contenant les éléments de paroi (122a, 122b, 122c, 122d) fournit des guides (128) sur ses côtés, à l'intérieur desquels coulissent des patins ou des profils de guidage respectifs (132) créés sur les bords latéraux des éléments de paroi.
  8. Système de récupération de lubrifiant et de protection selon l'une quelconque des revendications précédentes caractérisé en ce que chaque ouverture est réalisée en matériau antifriction et/ou comporte sur les bords de l'ouverture au moins deux cylindres de glissement (134) faisant saillie dans l'ouverture pour faciliter la rotation de l'élément cylindrique, de la broche ou du cylindre de travail.
  9. Cage de laminoir ou train de laminoir comprenant un ou plusieurs systèmes de récupération du lubrifiant et de protection selon l'une quelconque des revendications précédentes.
  10. Méthode pour la lubrification et la protection continues des accouplements de broches (111a, 111b) comprenant les étapes suivantes :
    (A) fourniture d'un système de récupération du lubrifiant et de protection selon la revendication 6, 7 ou 8;
    (B) lubrification des accouplements (111a, 111b) contenus dans le boîtier (120) par ledit dispositif de lubrification;
    (C) collecte dudit lubrifiant en excès dans ledit boîtier (120);
    (D) récupération dudit lubrifiant collecté par ladite sortie (130);
    (E) la réutilisation dudit lubrifiant drainé dans ledit dispositif de lubrification; et éventuellement, dans le cas d'un système selon la revendication 6 et l'une quelconque des revendications 2 à 4, la régulation de la distance entre lesdits accouplements (111a, 111b) comprimant/dilatant l'élément déformable (124b, 124d) entre deux éléments de paroi disposés l'un au-dessus de l'autre (122a et 122b, 122c et 122d) pour réduire/augmenter la distance et par conséquent dilater/compresser les autres éléments déformables (124a, 124d) présents dans la même paroi.
  11. Méthode pour faire varier la fente (118) entre les cylindres de travail dans une cage de laminoir et protéger simultanément les accouplements (111a, 111b) reliant les broches (114a, 114b) aux cylindres de travail comprenant les étapes suivantes :
    (A) fournir un système de récupération du lubrifiant et de protection selon l'une quelconque des revendications de 1 à 8 ; et
    (B) faire varier la distance entre lesdits accouplements (111a, 111b) et faire varier la hauteur des éléments de paroi respectifs (122a, 122b, 122c, 122d) ;
    dans lequel, dans le cas de la présence d'éléments déformables (124a, 124b, 124c, 124d), pendant la réduction de la distance, on ajoute l'étape de compression de l'élément déformable (124b, 124d) entre les broches respectives (114a, 114b) disposées l'une au-dessus de l'autre et entre les cylindres de travail respectifs disposés l'un au-dessus de l'autre en dilatant simultanément les autres éléments déformables (124a, 124c) présents dans la même paroi et, dans le cas d'une augmentation de la distance, on ajoute l'étape d'expansion de l'élément déformable (124b, 124d) entre les broches respectives (114a, 114b) disposées l'une au-dessus de l'autre et entre les cylindres de travail respectifs disposés l'un au-dessus de l'autre en comprimant simultanément les autres éléments déformables (124a, 124c) présents dans les mêmes parois.
  12. Boîtier de protection (120) qui comprend au moins deux ouvertures disposées l'une au-dessus de l'autre dans chacune de deux parois opposées du boîtier formant une paire d'ouvertures supérieures opposées et une paire d'ouvertures inférieures opposées, caractérisé en ce que chaque ouverture est située dans un élément de paroi (122a, 122b, 122c, 122d) et en ce qu'au moins une paire d'éléments de paroi opposés (122a, 122c et 122b, 122d) est mobile en hauteur à l'intérieur de la paroi, et en ce que la paroi est formée dans les parties affectées par le mouvement des éléments de paroi (122a, 122b, 122c, 122d) de matériau déformable (124a, 124b, 124c, 124d).
  13. Boîtier de protection (120) selon la revendication 12, caractérisé en ce que ladite au moins une paire d'éléments de paroi opposés (122a, 122c et 122b, 122d) est mobile en hauteur à l'intérieur de la paroi coulissant avec des patins ou des profils de guidage respectifs (132) à l'intérieur de guides (128) prévus dans les bords latéraux du côté respectif du boîtier (120).
EP19805393.6A 2018-10-30 2019-10-29 Système de récupération de lubrifiant et de protection pour raccords à broche Active EP3849720B1 (fr)

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IT102018000009918A IT201800009918A1 (it) 2018-10-30 2018-10-30 Sistema di recupero lubrificante e di protezione per snodi di allunghe
PCT/IB2019/059249 WO2020089783A1 (fr) 2018-10-30 2019-10-29 Système de récupération de lubrifiant et de protection pour raccords à broche

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DE1902894C3 (de) * 1969-01-22 1973-07-05 Siemag Siegener Masch Bau Zahngelenkspindel fuer Walzwerksantriebe mit einer Vorrichtung zur Umlaufschmierung
DE19711609A1 (de) * 1997-03-20 1998-09-24 Schloemann Siemag Ag Walzwerksantrieb mit Zahngelenkspindeln und mit einer Vorrichtung zur Umlaufschmierung
DE19757729B4 (de) * 1997-12-23 2004-09-16 Eitec Führungsbahnschutz-Systeme Gmbh Gliederschürze
FR2820353B1 (fr) * 2001-02-05 2003-05-23 Renault Automation Comau Dispositif de separation entre le poste d'usinage et le poste d'entrainement d'une machine-outil
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