EP0649686B1 - Rolling mill with axially shifting rolls - Google Patents

Rolling mill with axially shifting rolls Download PDF

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Publication number
EP0649686B1
EP0649686B1 EP19940402057 EP94402057A EP0649686B1 EP 0649686 B1 EP0649686 B1 EP 0649686B1 EP 19940402057 EP19940402057 EP 19940402057 EP 94402057 A EP94402057 A EP 94402057A EP 0649686 B1 EP0649686 B1 EP 0649686B1
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EP
European Patent Office
Prior art keywords
roll
rolling mill
chock
support
axial displacement
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EP19940402057
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German (de)
French (fr)
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EP0649686B2 (en
EP0649686A1 (en
Inventor
André Ravenet
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Clecim SAS
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
    • 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
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially
    • 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
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing

Definitions

  • the subject of the invention is a displacement rolling mill axial being able, in particular, to present a great opening stroke, such a rolling mill being usable more specially for hot rolling of metals not ferrous such as aluminum.
  • each working cylinder is associated with a plurality of support cylinders arranged symmetrically on one side and on the other side of the clamping plane.
  • the different cylinders have their axes substantially parallel and are superimposed on inside a cage with two uprights apart, each cylinder being centered on two aligned pins rotatably mounted, each via a bearing, in a holding chock which can slide at inside a window in the upright corresponding to the cage and provided with guide faces defining a direction of sliding of the chocks parallel to the clamping plane.
  • the clamping force is generally applied by mechanical or hydraulic cylinders supported on one side on the cage and on the other on the chocks of one of the support cylinders, the other cylinder being blocked, so as to determine an approximation of the cylinders with a some crushing effect of the product passing between the working cylinders.
  • the width of the product to be laminated which varies in depending on the work program, may be less than the length of the active part of the working cylinders. These are therefore not loaded uniformly and may arching causing excessive crushing of the sides side of the product.
  • Various means can be used, in known manner, to avoid this drawback.
  • modern rolling mills are often equipped with devices to exercise bending efforts, one way or the other, on the ends of the working rolls.
  • Such devices generally consist of cylinders which are supported on the holding chocks placed respectively at the two ends of each cylinder.
  • At least one of the cylinders is associated to an axial displacement control device comprising, for example, one or more cylinders fixed on amount of the cage, at the corresponding level and connected to one of the chocks of the cylinder by an organ hanging.
  • the cambering means can be placed on supports that slide with the chocks, but there results in a certain complication of the installation and hydraulic circuits (EP-A-026903, EP-A-067040).
  • JP-A-57-177.810 JP-A-57-177.810 to provide each movable cylinder with two pins whose length is increased by axial displacement distance so that slide axially with respect to the bearings of the chock corresponding, along a sliding span which extends over a length corresponding to the extent of the chock increased by the distance of movement.
  • the axial displacement means which are placed on one side of the cylinder, rest on one part end of the corresponding journal, beyond the span sliding, via an organ drive rotatably mounted on said end part and axially fixed on the trunnion, so as to control axial displacement of the cylinder without interfering with rotation of it.
  • the subject of the invention is new provisions. to solve all of these problems and, by particular, to realize the axial displacement of cylinders without stopping the scrolling of the product, even in the case of rolling mills having a very large stroke opening hours.
  • the invention therefore relates, in general, an axial displacement rolling mill comprising, at inside a cage with two uprights apart, at minus two superimposed cylinders between which passes a product to be laminated and each carried in pairs aligned journals rotatably mounted respectively, by through support bearings, each in a holding chock guided in an upright window correspondent of the cage parallel to a plane of clamping in which the axes are placed substantially cylinders, the rolling mill comprising means for adjustment of an axial offset of at least one of cylinders relative to the opposite cylinder in function the width of the product to be rolled, with sliding axial of the journals of said displaceable cylinder in their respective chocks which remain fixed axially with respect to the corresponding amounts of the cage, said axial adjustment means being supported on a drive member rotatably mounted on a end of one of the trunnions of said cylinder movable and axially integral with it.
  • axially movable cylinder can also be move parallel to itself and over a large opening stroke, along the vertical plane of clamping, with corresponding movement of chocks guided holding in the cage windows, as well as the drive member, and said axial displacement control means are provided a removable attachment means on the member and are mounted on a support likely to slide parallel to said plane of tightening and associated with positioning means of said means for controlling the axial displacement substantially at the level of the cylinder for engagement removable attachment means on the member cylinder drive.
  • the axial displacement control means include, for each movable cylinder, at least one cylinder hydraulic whose body is fixed on the support sliding and the removable hooking means is fixed at the end of the cylinder rod and is mounted sliding on the support, parallel to the axis of the cylinder.
  • the axial displacement control means include, at least for the cylinder movable in height, two cylinders placed symmetrically on either side of the clamping plane and are slidably mounted parallel to the clamping plane and susceptible to be controlled synchronously, said cylinders being mounted respectively on two movable supports in synchronism and associated, respectively, with means removable attachment with, respectively, two lateral parts of the drive member extending symmetrically on either side of the axis of the cylinder.
  • At least one of the supports is associated with a sensor for locating the position of said support, and to means for controlling the sliding of the support along the upright depending sensor indications for setting the position of said support at the cylinder to move and the engagement of the control means of the axial movement with a drive member axially integral with the cylinder with possibility of rotation.
  • Figure 1 is a partial half-view, in section transverse, a rolling stand fitted with a device according to the invention.
  • Figure 2 is a partial half-view, in section transverse, from the same rolling stand in position maximum cylinder opening.
  • Figure 3 shows all the cylinders in longitudinal section through the clamping plane.
  • Figure 4 is a detail view of the device axial displacement in horizontal section along the line AA in Figure 3.
  • Figure 5 is a partial view of the drive member according to arrow F 1 in Figure 4.
  • FIG. 6 is a sectional view, on an enlarged scale, along line BB in Figure 4.
  • Figure 7 is a side view, along arrow F 2 of Figure 1, of the height adjustment device.
  • Figures 1 and 2 show the parts essentials of a Quarto type rolling mill comprising a set of cylinders mounted inside a cage 1, respectively two working rolls 2, 2 ', placed on either side of a plan P1 for the passage of the product to laminate and taking support each, on the side opposite the product, respectively on two support cylinders 20, 20 '.
  • the axes of the different cylinders are substantially parallel and, most often, are placed substantially in the same clamping plane P2 which constitutes a plane of symmetry of the cage.
  • each working cylinder 2 (2 ') includes a cylindrical active part 21 (21') and two pins 22 centered on the axis x'x of the cylinder and each provided with a cylindrical seat 23 rotating in a holding chock 3 (3 '), comprising, so known, one or more bearings 31 housed in a case 32.
  • each support cylinder 20 (20 ') is carried by two pins each rotating in a chock 30.
  • the cage 1 consists essentially of two spread uprights 11, connected by a cross member 12 and between which are placed the cylinders.
  • the chocks 3 of working cylinders 2 and 30 of the supporting cylinders 20, are superimposed in windows 13 formed in the two uprights 11 and are provided with sliding faces 33 which can slide along guide faces 14 corresponding on each side of each window 13, parallel to the clamping plane P2 ( Figures 1 and 2).
  • the cage 1 can be provided with all kinds of known devices that don't need to be described in detail.
  • the product is usually transported on roller tables placed on either side of the rolling mill and whose level corresponds substantially to that of the upper generator of the working cylinder lower 2 'which rests on the lower support cylinder 20 ', these two cylinders therefore being placed at a level substantially constant.
  • the rolling mill is also equipped with cambering devices acting on the chocks from the working cylinders to make a bending called "positive” or “negative”, respectively by tightening or relative spacing of said chocks.
  • the chocks from working cylinders can be blocked axially with respect to the cage and the cylinders support. Therefore, it is possible to mount the means camber directly on chocks and avoid thus offsets and shifts.
  • the clamping force is applied, by means not shown, on the chocks 30 'of the lower support cylinder 20' including the level varies only slightly.
  • the width of the air gap is determined by the level of the upper support cylinder 20 which can be adjusted to a large amplitude between a minimum opening position and a maximum opening position, shown respectively in Figures 1 and 2.
  • This setting of height is effected by screws 15 on which are applied the chocks 30 of the support cylinder 20 to the auxiliary cylinders 16 mounted on the crossmember fixed 12 and hanging on corresponding ears of each chock.
  • the cylinders 17, which determine the spacing chocks 3, 3 ', working cylinders are dimensioned so as to be able to exert efforts of bending of the cylinders in the negative direction by spacing of chocks, against action, in direction reverse, of cylinders 34 of positive camber taking support directly, on one side on the chock 30 (30 ') of the cylinder support 20 (20 ') and the other on chock 3 (3') of associated working cylinder 2 (2 ').
  • each pin 22 is provided, as we have shown in Figure 3, a cylindrical seat 23 which can slide axially in the internal cage 35 of the bearing 31 of the corresponding holding chock 3 and this sliding surface 23 extends over a length L1 at least equal to the L2 right-of-way of the landing increased by the maximum amplitude D of the axial displacement which is wish to achieve.
  • the holding chocks 3a, 3b can be locked, axially, relative to the cage 1, the pins 22 sliding, along the spans of sliding 23 inside the corresponding bearings when adjusting the axial position of cylinder 2.
  • the internal cage of each bearing is mounted on a socket 35 having an internal face cylindrical of equal diameter, to the nearest assembly clearance, to that of the sliding surface 23.
  • each upright 11 of the cage is advantageously fitted with a lock 18 movable perpendicular to the clamping plane P1, under the action of a jack, so as to engage on lateral parts 36 of the chock 3 to block axially this with respect to the upright 11 in retaining, however, a possibility of sliding vertical allowing height adjustment of the chock 3.
  • one or more are advantageously used cylinders supported on an auxiliary chock 4 mounted on an end portion 24 of the pin 22 which extends outwards beyond the sliding range 23.
  • the auxiliary chock 4 comprises, in a conventional manner, a rolling bearing 41, housed in a housing 42 and whose inner cage is threaded on the extreme part 24 of the journal.
  • the latter is advantageously separated from the sliding surface 23 by a shoulder 25 against which the chock 4 can be axially blocked so known, for example by means of a screwed ring 43.
  • each working cylinder 2 (2 ') is controlled by two cylinders 5a, 5b, taking support, respectively, on both sides the amount 11 of the cage, on both sides of the window 13.
  • the axial displacement cylinders 5a, 5b are each mounted on a support 6 which can slide vertically, under the action of a jack 66, along a slide 61 fixed on the corresponding part of the amount 11 of the cage.
  • the slide 61 is advantageously constituted a profile kept at a certain distance from the upright 11 by arms 62 and defining a sliding face 63 parallel to the clamping plane P1.
  • Each support 6 is kept applied against the slide 61 by hooking members 64 and constitutes thus a slide on which is provided a slide 68 parallel to the axis x'x of cylinder 2 and along which can move a sliding part 53 in hook shape, attached to the end of the rod 52 of the displacement cylinder 5 whose body is fixed itself on a base 65 constituting a part of the slide 6 and defining an application face of the jack 5 perpendicular to the axis x'x of cylinder 2.
  • the two sliding hooks 53a, 53b, actuated, respectively, by the displacement cylinders 5a, 5b, are respectively provided with notches 54 in which engage lateral parts 45 formed, respectively on two ears 44 of the chock auxiliary 4 extending horizontally, on both sides on the other side of the cylinder axis x'x.
  • the chock 4 which could turn in its bearing 41, is held in a horizontal position by at least one rod 36 fixed on one side of the chock 3 and extending outwardly cantilevered from it, in a direction parallel to the x'x axis of the cylinder 2.
  • the rod 36 threads into a bore 46 of the chock 4 which thus is held horizontally and prevented from turning with cylinder 2, while being able to slide axially.
  • each notch 54 extends vertically over the entire height of the hook 53 so as to allow slight vertical displacements of the chock 4 for follow the deformations of the axis x'x of cylinder 2 under the action of the camber cylinders 17, 34.
  • each working cylinder is slidably mounted on their chocks in the same way respective 3a, 3b, but only one of them, for example the right pin 22b, is equipped with a chock auxiliary 4 connected to the cylinders 5 for axial movement.
  • the two cylinders 5a, 5b can control, by through the hooks 53a, 53b, and the chock 4, axial displacements of cylinder 2 which moves with the chock 4 mounted axially fixed on its end 24, while chocks 3a, 3b, working cylinders remain integral axially with the uprights 11 of the cage, sliding along the two pins 22a, 22b, of the cylinder.
  • each support slide 6 provided a cylinder 5 for axial displacement of the upper cylinder 2 can be moved vertically along the slide corresponding 61 under the action of an auxiliary cylinder 66 whose body is fixed on the amount of the cage and whose the rod is articulated, at its end, on the slide 6. It is thus possible, by means of the jacks 66, to adjust the heights of the two slides 6a, 6b, associated to the auxiliary chock 4 of the upper cylinder 2, from so as to place them substantially at the same level. In this position, the lateral parts 45 of the auxiliary chock 4 engage in the notches 54 hooks 53 mounted, with the jacks 5, on the slides 6a, 6b.
  • the lower working cylinder 2 ' is also provided with an associated auxiliary chock, in a way similar to two mounted 5 'displacement cylinders, respectively, on two 6 'slides, as we have shown in Figure 7.
  • the levels of the cylinder lower support 20 'and lower working cylinder 2 'which rests on it vary only slightly and it it is therefore not necessary, in service, to modify the height of the corresponding slides 6 'which remain at the working cylinder level lower 2 'and can therefore serve as a reference for adjusting the level of upper slides 6.
  • each upper slide 6 is associated with a linear sensor 67 comprising a rod sliding whose end is connected to the slide lower 6 '.
  • the sensors 67 therefore provide an indication of the height of the two upper slides 6 in the form of a signal which is taken into account by the general system control of the rolling mill and it acts on the cylinders 66 so as to adjust the height of the slides upper 6 compared to lower slides 6 ', depending on the spacing of the working rolls 2, 2 '.
  • each cylinder 2 is controlled by a sensor 69 whose body is fixed on the base 65 of the corresponding slide 6 and whose rod is connected to the displacement control hook 53 axial.
  • the camber cylinders 17, 34 can be mounted directly on chocks and therefore remain well centered with respect to the bearings, the cambering action can be exercised at the same time as the axial displacement of the working cylinders 2, 2 '.
  • the range of adjustment of the spacing between the working cylinders can be important, the axial displacement control devices which can be positioned immediately at the cylinders correspondents.
  • a rolling stand is generally fitted, at certain levels, with horizontal slides on which can rest, constantly, corresponding support parts of the chocks of each cylinder.
  • the two working cylinders are, usually removed from the cage at the same time upper cylinder resting on the lower cylinder.
  • each upper slide 6 is equipped a hook 7 which can engage, on the descent of the slide 6, on a corresponding hook 71 mounted swiveling around a horizontal axis on the slide lower 6 'and associated with a spring 73, the hook 71 can be opened by an auxiliary cylinder 72.
  • the axial displacement cylinders 5 then bring the two working rolls 2, 2 ', in the extreme position towards the right, as shown in the upper half-view of the Figure 4.
  • the rod 36 is engaged in the bore 46 of the auxiliary chock 4 only by its end which is provided with a groove 37 placed at the level of the posterior face of the chock 4.
  • This is fitted with a latching lever 8 pivotally mounted, on the chock 4, around an axis 81 and extended by an arm 82 which holds the hook 8 in the open position, against the action of a spring 83, when the hook of displacement 53 is engaged on the lateral part 45 of the chick 4.
  • Each attachment lever 8 is, moreover, provided a notch 84 which can engage in the groove 37 of the rod 36 under the action of the spring 83 when the lever 8 is released by raising the corresponding hook 53.
  • the invention has been described in the context of a Quarto rolling mill and for the axial displacement of working cylinders but the same layouts could be applicable to any type of rolling mill and other cylinders, for example the support cylinders or the intermediate rolls in a Sexto rolling mill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)

Description

L'invention a pour objet un laminoir à déplacement axial pouvant, en particulier, présenter une grande course d'ouverture, un tel laminoir étant utilisable plus spécialement pour le laminage à chaud de métaux non ferreux tels que l'aluminium.The subject of the invention is a displacement rolling mill axial being able, in particular, to present a great opening stroke, such a rolling mill being usable more specially for hot rolling of metals not ferrous such as aluminum.

On sait qu'un laminoir comprend, d'une façon générale, deux cylindres de travail superposés entre lesquels passe une plaque ou bande de métal à laminer, lesdits cylindres étant soumis, pour le laminage, à un effort de serrage déterminant un certain écrasement du produit.We know that a rolling mill understands, in a way general, two working cylinders superimposed between which passes a metal plate or strip to be laminated, said rolls being subjected, for rolling, to a clamping force determining a certain crushing of the product.

On connaít différents types de laminoirs et, en particulier, les laminoirs de type "Duo" comprenant seulement deux cylindres de travail d'assez grand diamètre, les laminoirs "Quarto" dans lesquels les deux cylindres de travail, de diamètre réduit, sont associés, respectivement, à deux cylindres d'appui et les laminoirs de type "Sexto" dans lesquels des cylindres intermédiaires sont interposés entre chaque cylindre d'appui et le cylindre de travail correspondant. Généralement, les axes des cylindres sont placés sensiblement dans un même plan de coulissement dit "plan de serrage".We know different types of rolling mills and, in particular, "Duo" type rolling mills including only two working cylinders large enough diameter, the "Quarto" rolling mills in which both working cylinders, of reduced diameter, are associated, respectively, two support rolls and rolling mills "Sexto" type in which cylinders intermediaries are interposed between each cylinder support and the corresponding working cylinder. Generally, the axes of the cylinders are placed substantially in the same sliding plane called "plane Clamping".

On connaít aussi des laminoirs dans lesquels chaque cylindre de travail est associé à une pluralité de cylindres d'appui disposés symétriquement de part et d'autre du plan de serrage.We also know rolling mills in which each working cylinder is associated with a plurality of support cylinders arranged symmetrically on one side and on the other side of the clamping plane.

D'une façon générale, les différents cylindres ont leurs axes sensiblement parallèles et sont superposés à l'intérieur d'une cage comportant deux montants écartés, chaque cylindre étant centré sur deux tourillons alignés montés rotatifs, chacun par l'intermédiaire d'un palier, dans une empoise de maintien qui peut coulisser à l'intérieur d'une fenêtre ménagée dans le montant correspondant de la cage et munie de faces de guidage définissant une direction de coulissement des empoises parallèlement au plan de serrage.Generally, the different cylinders have their axes substantially parallel and are superimposed on inside a cage with two uprights apart, each cylinder being centered on two aligned pins rotatably mounted, each via a bearing, in a holding chock which can slide at inside a window in the upright corresponding to the cage and provided with guide faces defining a direction of sliding of the chocks parallel to the clamping plane.

L'effort de serrage est généralement appliqué par des vérins mécaniques ou hydrauliques prenant appui d'un côté sur la cage et de l'autre sur les empoises de l'un des cylindres d'appui, l'autre cylindre étant bloqué, de façon à déterminer un rapprochement des cylindres avec un certain effet d'écrasement du produit passant entre les cylindres de travail.The clamping force is generally applied by mechanical or hydraulic cylinders supported on one side on the cage and on the other on the chocks of one of the support cylinders, the other cylinder being blocked, so as to determine an approximation of the cylinders with a some crushing effect of the product passing between the working cylinders.

La largeur du produit à laminer, qui varie en fonction du programme de travail, peut être inférieure à la longueur de la partie active des cylindres de travail. Ceux-ci ne sont donc pas chargés uniformément et peuvent se cambrer en provoquant un écrasement excessif des côtés latéraux du produit. Divers moyens peuvent être employés, de façon connue, pour éviter cet inconvénient. En particulier, pour corriger la répartition des contraintes sur toute la largeur du produit, les laminoirs modernes sont souvent munis de dispositifs permettant d'exercer des efforts de cambrage, dans un sens ou dans l'autre, sur les extrémités des cylindres de travail. De tels dispositifs sont constitués, généralement, de vérins qui prennent appui sur les empoises de maintien placées respectivement aux deux extrémités de chaque cylindre.The width of the product to be laminated, which varies in depending on the work program, may be less than the length of the active part of the working cylinders. These are therefore not loaded uniformly and may arching causing excessive crushing of the sides side of the product. Various means can be used, in known manner, to avoid this drawback. In particular, to correct the stress distribution across the entire product width, modern rolling mills are often equipped with devices to exercise bending efforts, one way or the other, on the ends of the working rolls. Such devices generally consist of cylinders which are supported on the holding chocks placed respectively at the two ends of each cylinder.

On peut aussi, dans les laminoirs plus perfectionnés, réaliser un déplacement, l'un par rapport à l'autre et parallèlement à leurs axes, des deux cylindres de travail de façon que la distance entre leurs extrémités opposées corresponde sensiblement à la largeur du produit à laminer.It is also possible, in more sophisticated rolling mills, move, relative to each other and two working cylinders parallel to their axes so that the distance between their opposite ends corresponds approximately to the width of the product to laminate.

A cet effet, au moins l'un des cylindres est associé à un dispositif de commande du déplacement axial comprenant, par exemple, un ou plusieurs vérins fixés sur un montant de la cage, au niveau correspondant et reliés à l'une des empoises du cylindre par un organe d'accrochage.For this purpose, at least one of the cylinders is associated to an axial displacement control device comprising, for example, one or more cylinders fixed on amount of the cage, at the corresponding level and connected to one of the chocks of the cylinder by an organ hanging.

Or, il est intéressant de disposer des deux systèmes de façon à pouvoir, d'une part, régler la position relative axiale des cylindres de travail et, d'autre part, corriger la répartition des contraintes au moyen des vérins de cambrage.However, it is interesting to have both systems so that, on the one hand, you can adjust the position relative axial of the working cylinders and, on the other hand, correct the stress distribution using bending cylinders.

Dans les laminoirs de type Sexto, les deux actions peuvent être séparées, les efforts de cambrage étant appliqués sur les cylindres de travail alors que le réglage axial est effectué sur les cylindres intermédiaires. Dans les laminoirs Duo ou Quarto, en revanche, le réglage axial et le cambrage doivent être effectués sur les cylindres de travail qui sont en contact direct avec le produit.In Sexto rolling mills, the two actions can be separated, the bending efforts being applied to the working rolls while the axial adjustment is carried out on the cylinders intermediaries. In the Duo or Quarto rolling mills, in however, the axial adjustment and the camber must be performed on the working cylinders which are in direct contact with the product.

Par ailleurs, il est souvent nécessaire de démonter les différents cylindres, pour entretien ou remplacement et, à cet effet, les deux empoises de chaque cylindre restent solidaires axialement de celui-ci de façon à être démontées avec lui. Par conséquent, lorsqu'un cylindre est déplacé axialement, ses deux empoises se déplacent avec lui par rapport aux montants de la cage.In addition, it is often necessary to disassemble the different cylinders, for maintenance or replacement and, for this purpose, the two chocks of each cylinder remain axially integral therewith so as to be disassembled with him. Therefore, when a cylinder is moved axially, its two chocks move with him compared to the amounts of the cage.

On peut placer les moyens de cambrage sur des supports qui coulissent avec les empoises, mais il en résulte une certaine complication de l'installation et des circuits hydrauliques (EP-A-026903, EP-A-067040).The cambering means can be placed on supports that slide with the chocks, but there results in a certain complication of the installation and hydraulic circuits (EP-A-026903, EP-A-067040).

On peut aussi fixer les moyens de cambrage sur les montants de la cage et prévoir des appuis glissants permettant le décalage de l'empoise, mais il en résulte un décentrement des efforts (EP-A-0283342).It is also possible to fix the cambering means on the amounts of the cage and provide sliding supports allowing the offset of the chock, but this results a decentralization of efforts (EP-A-0283342).

Pour éviter ces inconvénients, on a aussi proposé (JP-A-57-177.810) de munir chaque cylindre déplaçable de deux tourillons dont la longueur est augmentée de la distance de déplacement axial de façon à pouvoir coulisser axialement par rapport aux paliers de l'empoise correspondante, le long d'une portée de glissement qui s'étend sur une longueur correspondant à l'emprise de l'empoise augmentée de la distance de déplacement. Dans ce cas, les moyens de déplacement axial, qui sont placés sur un côté du cylindre, prennent appui sur une partie extrême du tourillon correspondant, au-delà de la portée de glissement, par l'intermédiaire d'un organe d'entraínement monté rotatif sur ladite partie extrême et calée axialement sur le tourillon, de façon à commander le déplacement axial du cylindre sans gêner la rotation de celui-ci.To avoid these drawbacks, we have also proposed (JP-A-57-177.810) to provide each movable cylinder with two pins whose length is increased by axial displacement distance so that slide axially with respect to the bearings of the chock corresponding, along a sliding span which extends over a length corresponding to the extent of the chock increased by the distance of movement. In in this case, the axial displacement means, which are placed on one side of the cylinder, rest on one part end of the corresponding journal, beyond the span sliding, via an organ drive rotatably mounted on said end part and axially fixed on the trunnion, so as to control axial displacement of the cylinder without interfering with rotation of it.

Par ailleurs, dans les installations modernes, il est souhaitable de modifier la position axiale des cylindres sans arrêt du laminage et, par conséquent, du cambrage des cylindres, par exemple lorsque le changement de largeur se fait en continu, sans interrompre le défilement de la bande.Furthermore, in modern installations, it is desirable to change the axial position of the cylinders without stopping rolling and, therefore, bending cylinders, for example when the change of width is done continuously, without interrupting the tape scrolling.

Mais, une autre difficulté vient aussi du fait que l'écartement des cylindres doit varier en fonction de l'épaisseur du produit. On peut s'en accomoder lorsque cette variation reste assez réduite, par exemple sur les trains finisseurs ou pour le laminage de tôles d'épaisseur assez faible. Cependant, il est parfois nécessaire de faire varier notablement la position en hauteur des cylindres de travail comme, par exemple, pour le laminage des métaux non ferreux et, plus généralement, lorsqu'un même laminoir doit servir à la fois d'ébaucheur et de finisseur, ce qui nécessite une grande course d'ouverture.But another difficulty also comes from the fact that the spacing of the cylinders must vary depending on the thickness of the product. We can accommodate it when this variation remains fairly small, for example on finishing trains or for sheet metal rolling fairly thin. However, it is sometimes necessary to vary the position significantly height of the working cylinders such as, for example, for the rolling of non-ferrous metals and, more generally, when the same rolling mill must serve at the same time as a rougher and finisher, which requires a large stroke opening hours.

L'invention a pour objet de nouvelles dispositions permettant de résoudre l'ensemble de ces problèmes et, en particulier, de réaliser le déplacement axial des cylindres sans arrêt du défilement du produit, même dans le cas de laminoirs ayant une très grande course d'ouverture. The subject of the invention is new provisions. to solve all of these problems and, by particular, to realize the axial displacement of cylinders without stopping the scrolling of the product, even in the case of rolling mills having a very large stroke opening hours.

L'invention concerne donc, d'une façon générale, un laminoir à déplacement axial comprenant, à l'intérieur d'une cage ayant deux montants écartés, au moins deux cylindres superposés entre lesquels passe un produit à laminer et portés chacun par deux tourillons alignés montés rotatifs respectivement, par l'intermédiaire de paliers d'appui, chacun dans une empoise de maintien guidée dans une fenêtre du montant correspondant de la cage parallèlement à un plan de serrage dans lequel sont placés sensiblement les axes des cylindres, le laminoir comportant des moyens de réglage d'un décalage axial d'au moins l'un des cylindres par rapport au cylindre opposé en fonction de la largeur du produit à laminer, avec coulissement axial des tourillons dudit cylindre déplaçable dans leurs empoises respectives qui restent fixes axialement par rapport aux montants correspondants de la cage, lesdits moyens de réglage axial prenant appui sur un organe d'entraínement monté rotatif sur une extrémité de l'un des tourillons dudit cylindre déplaçable et solidaire axialement de celui-ci.The invention therefore relates, in general, an axial displacement rolling mill comprising, at inside a cage with two uprights apart, at minus two superimposed cylinders between which passes a product to be laminated and each carried in pairs aligned journals rotatably mounted respectively, by through support bearings, each in a holding chock guided in an upright window correspondent of the cage parallel to a plane of clamping in which the axes are placed substantially cylinders, the rolling mill comprising means for adjustment of an axial offset of at least one of cylinders relative to the opposite cylinder in function the width of the product to be rolled, with sliding axial of the journals of said displaceable cylinder in their respective chocks which remain fixed axially with respect to the corresponding amounts of the cage, said axial adjustment means being supported on a drive member rotatably mounted on a end of one of the trunnions of said cylinder movable and axially integral with it.

Conformément à l'invention, pour s'adapter à un changement d'épaisseur du produit à laminer, le cylindre déplaçable axialement peut en outre se déplacer parallèlement à lui-même et sur une grande course d'ouverture, le long du plan vertical de serrage, avec déplacement correspondant des empoises de maintien guidées dans les fenêtres de la cage, ainsi que de l'organe d'entraínement, et lesdits moyens de commande du déplacement axial sont munis d'un moyen d'accrochage amovible sur l'organe d'entraínement et sont montés sur un support susceptible de coulisser parallèlement audit plan de serrage et associé à des moyens de positionnement desdits moyens de commande du déplacement axial sensiblement au niveau du cylindre pour l'engagement du moyen d'accrochage amovible sur l'organe d'entraínement du cylindre.According to the invention, to adapt to a change in thickness of the product to be rolled, axially movable cylinder can also be move parallel to itself and over a large opening stroke, along the vertical plane of clamping, with corresponding movement of chocks guided holding in the cage windows, as well as the drive member, and said axial displacement control means are provided a removable attachment means on the member and are mounted on a support likely to slide parallel to said plane of tightening and associated with positioning means of said means for controlling the axial displacement substantially at the level of the cylinder for engagement removable attachment means on the member cylinder drive.

Dans un mode de réalisation préférentiel, les moyens de commande du déplacement axial comprennent, pour chaque cylindre déplaçable, au moins un vérin hydraulique dont le corps est fixé sur le support coulissant et le moyen d'accrochage amovible est fixé à l'extrémité de la tige du vérin et est monté coulissant sur le support, parallèlement à l'axe du cylindre.In a preferred embodiment, the axial displacement control means include, for each movable cylinder, at least one cylinder hydraulic whose body is fixed on the support sliding and the removable hooking means is fixed at the end of the cylinder rod and is mounted sliding on the support, parallel to the axis of the cylinder.

Selon une autre disposition avantageuse, les moyens de commande du déplacement axial comprennent, au moins pour le cylindre déplaçable en hauteur, deux vérins placés symétriquement de part et d'autre du plan de serrage et sont montés coulissants parallèlement au plan de serrage et susceptibles d'être commandés en synchronisme, lesdits vérins étant montés respectivement sur deux supports déplaçables en synchronisme et associés, respectivement, à des moyens d'accrochage amovible avec, respectivement, deux parties latérales de l'organe d'entraínement s'étendant symétriquement de part et d'autre de l'axe du cylindre.According to another advantageous arrangement, the axial displacement control means include, at least for the cylinder movable in height, two cylinders placed symmetrically on either side of the clamping plane and are slidably mounted parallel to the clamping plane and susceptible to be controlled synchronously, said cylinders being mounted respectively on two movable supports in synchronism and associated, respectively, with means removable attachment with, respectively, two lateral parts of the drive member extending symmetrically on either side of the axis of the cylinder.

Par ailleurs, au moins l'un des supports coulissants est associé à un capteur de repérage de la position dudit support, et à des moyens de commande du coulissement du support le long du montant en fonction des indications du capteur pour le réglage de la position dudit support au niveau du cylindre à déplacer et l'engagement des moyens de commande du déplacement axial avec un organe d'entraínement solidaire axialement du cylindre avec possibilité de rotation. In addition, at least one of the supports is associated with a sensor for locating the position of said support, and to means for controlling the sliding of the support along the upright depending sensor indications for setting the position of said support at the cylinder to move and the engagement of the control means of the axial movement with a drive member axially integral with the cylinder with possibility of rotation.

Mais l'invention comporte également plusieurs autres caractéristiques avantageuses qui font l'objet des revendications secondaires et elle sera mieux comprise par la description qui va suivre d'un mode de réalisation particulier, donné à titre d'exemple et représenté sur les dessins annexés. But the invention also includes several other advantageous characteristics which are the subject secondary claims and it will be better understood by the following description of a mode of particular realization, given by way of example and shown in the accompanying drawings.

La Figure 1 est une demi-vue partielle, en coupe transversale, d'une cage de laminoir équipée d'un dispositif selon l'invention.Figure 1 is a partial half-view, in section transverse, a rolling stand fitted with a device according to the invention.

La Figure 2 est une demi-vue partielle, en coupe transversale, de la même cage de laminoir en position d'ouverture maximale des cylindres.Figure 2 is a partial half-view, in section transverse, from the same rolling stand in position maximum cylinder opening.

La Figure 3 représente l'ensemble des cylindres en coupe longitudinale par le plan de serrage.Figure 3 shows all the cylinders in longitudinal section through the clamping plane.

La Figure 4 est une vue de détail du dispositif de déplacement axial en coupe horizontale suivant la ligne AA de la Figure 3.Figure 4 is a detail view of the device axial displacement in horizontal section along the line AA in Figure 3.

La Figure 5 est une vue partielle de l'organe d'entraínement suivant la flèche F1 de la Figure 4.Figure 5 is a partial view of the drive member according to arrow F 1 in Figure 4.

La Figure 6 est une vue en coupe, à échelle agrandie, suivant la ligne BB de la Figure 4.FIG. 6 is a sectional view, on an enlarged scale, along line BB in Figure 4.

La Figure 7 est une vue de côté, suivant la flèche F2 de la Figure 1, du dispositif de réglage en hauteur.Figure 7 is a side view, along arrow F 2 of Figure 1, of the height adjustment device.

Sur les Figures 1 et 2, on a représenté les parties essentielles d'un laminoir de type Quarto comprenant un ensemble de cylindres montés à l'intérieur d'une cage 1, respectivement deux cylindres de travail 2, 2', placés de part et d'autre d'un plan P1 de passage du produit à laminer et prenant appui chacun, du côté opposé au produit, respectivement sur deux cylindres d'appui 20, 20'.Figures 1 and 2 show the parts essentials of a Quarto type rolling mill comprising a set of cylinders mounted inside a cage 1, respectively two working rolls 2, 2 ', placed on either side of a plan P1 for the passage of the product to laminate and taking support each, on the side opposite the product, respectively on two support cylinders 20, 20 '.

Les axes des différents cylindres sont sensiblement parallèles et, le plus souvent, sont placés sensiblement dans un même plan de serrage P2 qui constitue un plan de symétrie de la cage.The axes of the different cylinders are substantially parallel and, most often, are placed substantially in the same clamping plane P2 which constitutes a plane of symmetry of the cage.

Comme on l'a indiqué sur la Figure 3, qui est une vue en coupe par le plan P2, chaque cylindre de travail 2 (2') comprend une partie active cylindrique 21 (21') et deux tourillons 22 centrés sur l'axe x'x du cylindre et munis chacun d'une portée cylindrique 23 tournant dans une empoise de maintien 3 (3'), comprenant, de façon connue, un ou plusieurs paliers à roulements 31 logés dans un boítier 32.As shown in Figure 3, which is a view in section through the plane P2, each working cylinder 2 (2 ') includes a cylindrical active part 21 (21') and two pins 22 centered on the axis x'x of the cylinder and each provided with a cylindrical seat 23 rotating in a holding chock 3 (3 '), comprising, so known, one or more bearings 31 housed in a case 32.

De la même façon, chaque cylindre d'appui 20 (20') est porté par deux tourillons tournant chacun dans une empoise 30.Similarly, each support cylinder 20 (20 ') is carried by two pins each rotating in a chock 30.

La cage 1 est constituée essentiellement de deux montants écartés 11, reliés par une traverse 12 et entre lesquels sont placés les cylindres. Les empoises 3 des cylindres de travail 2 et 30 des cylindres d'appui 20, sont superposées dans des fenêtres 13 ménagées dans les deux montants 11 et sont munies de faces de glissement 33 qui peuvent coulisser le long de faces de guidage correspondantes 14 ménagées de part et d'autre de chaque fenêtre 13, parallèlement au plan de serrage P2 (Figures 1 et 2).The cage 1 consists essentially of two spread uprights 11, connected by a cross member 12 and between which are placed the cylinders. The chocks 3 of working cylinders 2 and 30 of the supporting cylinders 20, are superimposed in windows 13 formed in the two uprights 11 and are provided with sliding faces 33 which can slide along guide faces 14 corresponding on each side of each window 13, parallel to the clamping plane P2 (Figures 1 and 2).

Des moyens connus, mécaniques ou hydrauliques, permettent d'exercer, entre les cylindres d'appui 20, 20', un effort de serrage qui est transmis aux cylindres de travail 2, 2', et détermine un certain écrasement du produit passant entre ces derniers, le long du plan P1.Known means, mechanical or hydraulic, allow to exercise, between the support cylinders 20, 20 ', a clamping force which is transmitted to the cylinders 2, 2 ', and determines a certain crushing of the product passing between them, along the plane P1.

D'une façon générale, la cage 1 peut être munie de toutes sortes de dispositifs connus qui n'ont pas besoin d'être décrits en détail.Generally, the cage 1 can be provided with all kinds of known devices that don't need to be described in detail.

Par exemple, le produit est généralement transporté sur des tables à rouleaux placées de part et d'autre du laminoir et dont le niveau correspond sensiblement à celui de la génératrice supérieure du cylindre de travail inférieur 2' qui repose sur le cylindre d'appui inférieur 20', ces deux cylindres étant donc placés à un niveau sensiblement constant. En revanche, on peut faire varier plus largement les niveaux du cylindre de travail supérieur 2 et du cylindre d'appui associé 20 pour adapter à l'épaisseur du produit la largeur de l'entrefer entre les cylindres de travail 2, 2'.For example, the product is usually transported on roller tables placed on either side of the rolling mill and whose level corresponds substantially to that of the upper generator of the working cylinder lower 2 'which rests on the lower support cylinder 20 ', these two cylinders therefore being placed at a level substantially constant. However, we can vary more broadly the levels of the working cylinder upper 2 and associated support cylinder 20 for adapt to the thickness of the product the width of the air gap between the working rolls 2, 2 '.

D'autre part, comme on l'a indiqué, le laminoir est aussi équipé de dispositifs de cambrage agissant sur les empoises des cylindres de travail pour réaliser un cambrage dit "positif" ou "négatif", respectivement par resserrement ou écartement relatif desdites empoises.On the other hand, as indicated, the rolling mill is also equipped with cambering devices acting on the chocks from the working cylinders to make a bending called "positive" or "negative", respectively by tightening or relative spacing of said chocks.

Selon l'une des caractéristiques de l'invention, les empoises des cylindres de travail peuvent être bloquées axialement par rapport à la cage et aux cylindres d'appui. De ce fait, il est possible de monter les moyens de cambrage directement sur les empoises et d'éviter ainsi les décentrements et les glissements.According to one of the characteristics of the invention, the chocks from working cylinders can be blocked axially with respect to the cage and the cylinders support. Therefore, it is possible to mount the means camber directly on chocks and avoid thus offsets and shifts.

Dans le mode de réalisation représenté, à titre d'exemple, sur les Figures, l'effort de serrage est appliqué, par des moyens non représentés, sur les empoises 30' du cylindre d'appui inférieur 20' dont le niveau ne varie que faiblement. A chaque passe, la largeur de l'entrefer est déterminée par le niveau du cylindre d'appui supérieur 20 qui peut être réglé sur une grande amplitude entre une position d'ouverture minimale et une position d'ouverture maximale, représentées respectivement sur les Figures 1 et 2. Ce réglage de hauteur est effectué par des vis 15 sur lesquelles sont appliquées les empoises 30 du cylindre d'appui 20 au moyen de vérins auxiliaires 16 montés sur la traverse fixe 12 et s'accrochant sur des oreilles correspondantes de chaque empoise.In the embodiment shown, as example, in the Figures, the clamping force is applied, by means not shown, on the chocks 30 'of the lower support cylinder 20' including the level varies only slightly. With each pass, the width of the air gap is determined by the level of the upper support cylinder 20 which can be adjusted to a large amplitude between a minimum opening position and a maximum opening position, shown respectively in Figures 1 and 2. This setting of height is effected by screws 15 on which are applied the chocks 30 of the support cylinder 20 to the auxiliary cylinders 16 mounted on the crossmember fixed 12 and hanging on corresponding ears of each chock.

Des vérins 17, placés entre les empoises des cylindres de travail 2, 2', permettent d'appliquer le cylindre de travail supérieur 2 contre le cylindre d'appui supérieur 20, en prenant appui sur les empoises du cylindre de travail inférieur 2' qui repose lui-même sur le cylindre d'appui inférieur 20'.Cylinders 17, placed between the chocks of the working cylinders 2, 2 ', allow to apply the upper working cylinder 2 against the cylinder upper support 20, taking support on the chocks the lower working cylinder 2 'which rests itself on the lower support cylinder 20 '.

On peut ainsi régler l'écartement des cylindres, éventuellement sur une grande amplitude, en fonction de l'épaisseur du produit à laminer. Dans le cas, notamment, des métaux non ferreux, le même laminoir peut ainsi servir d'abord d'ébaucheur puis de finisseur.We can thus adjust the spacing of the cylinders, possibly over a large amplitude, depending on the thickness of the product to be laminated. In particular, non-ferrous metals, the same rolling mill can thus first serve as a rougher then a finisher.

En outre, les vérins 17, qui déterminent l'écartement des empoises 3, 3', des cylindres de travail, sont dimensionnés de façon à pouvoir exercer des efforts de cambrage des cylindres dans le sens négatif par écartement des empoises, contre l'action, en sens inverse, de vérins 34 de cambrage positif prenant appui directement, d'un côté sur l'empoise 30 (30') du cylindre d'appui 20 (20') et de l'autre sur l'empoise 3 (3') du cylindre de travail associé 2 (2').In addition, the cylinders 17, which determine the spacing chocks 3, 3 ', working cylinders, are dimensioned so as to be able to exert efforts of bending of the cylinders in the negative direction by spacing of chocks, against action, in direction reverse, of cylinders 34 of positive camber taking support directly, on one side on the chock 30 (30 ') of the cylinder support 20 (20 ') and the other on chock 3 (3') of associated working cylinder 2 (2 ').

Pour permettre les déplacements axiaux des cylindres de travail, chaque tourillon 22 est muni, comme on l'a représenté sur la Figure 3, d'une portée cylindrique 23 qui peut coulisser axialement dans la cage interne 35 du palier 31 de l'empoise de maintien correspondante 3 et cette portée de glissement 23 s'étend sur une longueur L1 au moins égale à l'emprise L2 du palier augmentée de l'amplitude maximale D du déplacement axial que l'on souhaite réaliser.To allow axial movements of the cylinders working, each pin 22 is provided, as we have shown in Figure 3, a cylindrical seat 23 which can slide axially in the internal cage 35 of the bearing 31 of the corresponding holding chock 3 and this sliding surface 23 extends over a length L1 at least equal to the L2 right-of-way of the landing increased by the maximum amplitude D of the axial displacement which is wish to achieve.

De la sorte, les empoises de maintien 3a, 3b, peuvent être bloquées, dans le sens axial, par rapport à la cage 1, les tourillons 22 coulissant, le long des portées de glissement 23 à l'intérieur des paliers correspondants lorsque l'on règle la position axiale du cylindre 2.In this way, the holding chocks 3a, 3b, can be locked, axially, relative to the cage 1, the pins 22 sliding, along the spans of sliding 23 inside the corresponding bearings when adjusting the axial position of cylinder 2.

De préférence, la cage interne de chaque palier est montée sur une douille 35 ayant une face interne cylindrique de diamètre égal, au jeu de montage près, à celui de la portée de glissement 23.Preferably, the internal cage of each bearing is mounted on a socket 35 having an internal face cylindrical of equal diameter, to the nearest assembly clearance, to that of the sliding surface 23.

Comme on l'a indiqué sur la Figure 4, qui est une vue de détail montrant, en demi-coupe, les deux positions axiales d'un cylindre de travail 2, chaque montant 11 de la cage est avantageusement équipé d'un verrou 18 déplaçable perpendiculairement au plan de serrage P1, sous l'action d'un vérin, de façon à s'engager sur des parties latérales 36 de l'empoise 3 pour bloquer axialement celle-ci par rapport au montant 11 en conservant, cependant, une possibilité de coulissement vertical permettant le réglage en hauteur de l'empoise 3.As shown in Figure 4, which is a view detail showing, in half-section, the two positions axial of a working cylinder 2, each upright 11 of the cage is advantageously fitted with a lock 18 movable perpendicular to the clamping plane P1, under the action of a jack, so as to engage on lateral parts 36 of the chock 3 to block axially this with respect to the upright 11 in retaining, however, a possibility of sliding vertical allowing height adjustment of the chock 3.

Pour appliquer l'effort de déplacement axial sur le cylindre, on utilise avantageusement un ou plusieurs vérins prenant appui sur une empoise auxiliaire 4 montée sur une partie extrême 24 du tourillon 22 qui s'étend vers l'extérieur au-delà de la portée de glissement 23.To apply the axial displacement force on the cylinder, one or more are advantageously used cylinders supported on an auxiliary chock 4 mounted on an end portion 24 of the pin 22 which extends outwards beyond the sliding range 23.

L'empoise auxiliaire 4 comprend, de façon classique, un palier à roulements 41, logé dans un boítier 42 et dont la cage interne est enfilée sur la partie extrême 24 du tourillon.The auxiliary chock 4 comprises, in a conventional manner, a rolling bearing 41, housed in a housing 42 and whose inner cage is threaded on the extreme part 24 of the journal.

Cette dernière est avantageusement séparée de la portée de glissement 23 par un épaulement 25 contre lequel l'empoise 4 peut être bloquée axialement de façon connue, par exemple au moyen d'une bague vissée 43.The latter is advantageously separated from the sliding surface 23 by a shoulder 25 against which the chock 4 can be axially blocked so known, for example by means of a screwed ring 43.

De préférence, le déplacement axial de chaque cylindre de travail 2 (2') est commandé par deux vérins 5a, 5b, prenant appui, respectivement, sur les deux côtés du montant 11 de la cage, de part et d'autre de la fenêtre 13.Preferably, the axial displacement of each working cylinder 2 (2 ') is controlled by two cylinders 5a, 5b, taking support, respectively, on both sides the amount 11 of the cage, on both sides of the window 13.

Pour suivre les variations du niveau du cylindre de travail supérieur 2 qui peut être réglé sur une grande amplitude, les vérins de déplacement axial 5a, 5b, sont montés chacun sur un support 6 pouvant coulisser verticalement, sous l'action d'un vérin 66, le long d'une glissière 61 fixée sur la partie correspondante du montant 11 de la cage. Comme on l'a représenté sur la Figure 4, la glissière 61 est avantageusement constituée d'un profilé maintenu à une certaine distance du montant 11 par des bras 62 et définissant une face de glissement 63 parallèle au plan de serrage P1.To follow variations in the cylinder level of upper work 2 which can be set to a large amplitude, the axial displacement cylinders 5a, 5b, are each mounted on a support 6 which can slide vertically, under the action of a jack 66, along a slide 61 fixed on the corresponding part of the amount 11 of the cage. As shown in the Figure 4, the slide 61 is advantageously constituted a profile kept at a certain distance from the upright 11 by arms 62 and defining a sliding face 63 parallel to the clamping plane P1.

Chaque support 6 est maintenu appliqué contre la glissière 61 par des organes d'accrochage 64 et constitue ainsi un coulisseau sur lequel est ménagée une glissière 68 parallèle à l'axe x'x du cylindre 2 et le long de laquelle peut se déplacer une pièce coulissante 53 en forme de crochet, fixée sur l'extrémité de la tige 52 du vérin de déplacement 5 dont le corps est fixé lui-même sur une embase 65 constituant une partie du coulisseau 6 et définissant une face d'application du vérin 5 perpendiculaire à l'axe x'x du cylindre 2.Each support 6 is kept applied against the slide 61 by hooking members 64 and constitutes thus a slide on which is provided a slide 68 parallel to the axis x'x of cylinder 2 and along which can move a sliding part 53 in hook shape, attached to the end of the rod 52 of the displacement cylinder 5 whose body is fixed itself on a base 65 constituting a part of the slide 6 and defining an application face of the jack 5 perpendicular to the axis x'x of cylinder 2.

Les deux crochets coulissants 53a, 53b, actionnés, respectivement, par les vérins de déplacement 5a, 5b, sont munis respectivement d'encoches 54 dans lesquelles s'engagent des parties latérales 45 ménagées, respectivement sur deux oreilles 44 de l'empoise auxiliaire 4 s'étendant horizontalement, de part et d'autre de l'axe x'x du cylindre.The two sliding hooks 53a, 53b, actuated, respectively, by the displacement cylinders 5a, 5b, are respectively provided with notches 54 in which engage lateral parts 45 formed, respectively on two ears 44 of the chock auxiliary 4 extending horizontally, on both sides on the other side of the cylinder axis x'x.

L'empoise 4, qui pourrait tourner dans son palier 41, est maintenue en position horizontale par au moins une tige 36 fixée sur un côté de l'empoise 3 et s'étendant vers l'extérieur en porte-à-faux, à partir de celle-ci, suivant une direction parallèle à l'axe x'x du cylindre 2. A son extrémité opposée à l'empoise 3, la tige 36 s'enfile dans un alésage 46 de l'empoise 4 qui, ainsi, est maintenue horizontalement et empêchée de tourner avec le cylindre 2, tout en pouvant coulisser axialement.The chock 4, which could turn in its bearing 41, is held in a horizontal position by at least one rod 36 fixed on one side of the chock 3 and extending outwardly cantilevered from it, in a direction parallel to the x'x axis of the cylinder 2. At its end opposite to the chock 3, the rod 36 threads into a bore 46 of the chock 4 which thus is held horizontally and prevented from turning with cylinder 2, while being able to slide axially.

D'autre part, chaque encoche 54 s'étend verticalement sur toute la hauteur du crochet 53 de façon à permettre de légers déplacements verticaux de l'empoise 4 pour suivre les déformations de l'axe x'x du cylindre 2 sous l'action des vérins de cambrage 17, 34.On the other hand, each notch 54 extends vertically over the entire height of the hook 53 so as to allow slight vertical displacements of the chock 4 for follow the deformations of the axis x'x of cylinder 2 under the action of the camber cylinders 17, 34.

Comme on l'a représenté sur la Figure 3, les deux tourillons 22a, 22b, de chaque cylindre de travail sont montés coulissants de la même façon sur leurs empoises respectives 3a, 3b, mais un seul d'entre eux, par exemple le tourillon de droite 22b, est équipé d'une empoise auxiliaire 4 reliée aux vérins 5 de déplacement axial. As shown in Figure 3, the two pins 22a, 22b, of each working cylinder are slidably mounted on their chocks in the same way respective 3a, 3b, but only one of them, for example the right pin 22b, is equipped with a chock auxiliary 4 connected to the cylinders 5 for axial movement.

Ainsi, grâce aux dispositions qui viennent d'être décrites, les deux vérins 5a, 5b, peuvent commander, par l'intermédiaire des crochets 53a, 53b, et de l'empoise 4, des déplacements axiaux du cylindre 2 qui se déplace avec l'empoise 4 montée fixe axialement sur son extrémité 24, alors que les empoises 3a, 3b, des cylindres de travail restent solidaires, axialement, des montants 11 de la cage, en glissant le long des deux tourillons 22a, 22b, du cylindre.Thus, thanks to the provisions which have just been described, the two cylinders 5a, 5b, can control, by through the hooks 53a, 53b, and the chock 4, axial displacements of cylinder 2 which moves with the chock 4 mounted axially fixed on its end 24, while chocks 3a, 3b, working cylinders remain integral axially with the uprights 11 of the cage, sliding along the two pins 22a, 22b, of the cylinder.

Comme on l'a indiqué précédemment, il est possible de faire varier largement le niveau du cylindre de travail supérieur 2 et, par conséquent, de l'empoise 4 de commande des déplacements axiaux. Pour s'adapter au niveau du cylindre, chaque coulisseau de support 6 muni d'un vérin 5 de déplacement axial du cylindre supérieur 2 peut être déplacé verticalement le long de la glissière correspondante 61 sous l'action d'un vérin auxiliaire 66 dont le corps est fixé sur le montant de la cage et dont la tige est articulée, à son extrémité, sur le coulisseau 6. Il est ainsi possible, au moyen des vérins 66, de régler les hauteurs des deux coulisseaux 6a, 6b, associés à l'empoise auxiliaire 4 du cylindre supérieur 2, de façon à les placer sensiblement au niveau de celle-ci. Dans cette position, les parties latérales 45 de l'empoise auxiliaire 4 s'engagent dans les encoches 54 des crochets 53 montés, avec les vérins 5, sur les coulisseaux 6a, 6b.As mentioned earlier, it is possible to vary the working cylinder level widely upper 2 and, therefore, chock 4 of control of axial displacements. To adapt to cylinder level, each support slide 6 provided a cylinder 5 for axial displacement of the upper cylinder 2 can be moved vertically along the slide corresponding 61 under the action of an auxiliary cylinder 66 whose body is fixed on the amount of the cage and whose the rod is articulated, at its end, on the slide 6. It is thus possible, by means of the jacks 66, to adjust the heights of the two slides 6a, 6b, associated to the auxiliary chock 4 of the upper cylinder 2, from so as to place them substantially at the same level. In this position, the lateral parts 45 of the auxiliary chock 4 engage in the notches 54 hooks 53 mounted, with the jacks 5, on the slides 6a, 6b.

Le cylindre de travail inférieur 2' est également muni d'une empoise auxiliaire associée, d'une façon analogue, à deux vérins de déplacement 5' montés, respectivement, sur deux coulisseaux 6', comme on l'a indiqué sur la Figure 7.The lower working cylinder 2 'is also provided with an associated auxiliary chock, in a way similar to two mounted 5 'displacement cylinders, respectively, on two 6 'slides, as we have shown in Figure 7.

Dans l'exemple représenté, les niveaux du cylindre d'appui inférieur 20' et du cylindre de travail inférieur 2' qui repose sur lui ne varient que faiblement et il n'est donc pas nécessaire, en service, de modifier la hauteur des coulisseaux correspondants 6' qui restent au niveau du cylindre de travail inférieur 2' et peuvent donc servir de référence pour le réglage du niveau des coulisseaux supérieurs 6.In the example shown, the levels of the cylinder lower support 20 'and lower working cylinder 2 'which rests on it vary only slightly and it it is therefore not necessary, in service, to modify the height of the corresponding slides 6 'which remain at the working cylinder level lower 2 'and can therefore serve as a reference for adjusting the level of upper slides 6.

A cet effet, chaque coulisseau supérieur 6 est associé à un capteur linéaire 67 comprenant une tige coulissante dont l'extrémité est reliée au coulisseau inférieur 6'.For this purpose, each upper slide 6 is associated with a linear sensor 67 comprising a rod sliding whose end is connected to the slide lower 6 '.

Les capteurs 67 fournissent donc une indication sur la hauteur des deux coulisseaux supérieurs 6 sous forme d'un signal qui est pris en compte par le système général de contrôle du laminoir et celui-ci agit sur les vérins 66 de façon à régler la hauteur des coulisseaux supérieurs 6 par rapport aux coulisseaux inférieurs 6', en fonction de l'écartement des cylindres de travail 2, 2'.The sensors 67 therefore provide an indication of the height of the two upper slides 6 in the form of a signal which is taken into account by the general system control of the rolling mill and it acts on the cylinders 66 so as to adjust the height of the slides upper 6 compared to lower slides 6 ', depending on the spacing of the working rolls 2, 2 '.

D'une façon analogue, comme on l'a représenté sur la Figure 7, la position axiale de chaque cylindre 2 est contrôlée par un capteur 69 dont le corps est fixé sur l'embase 65 du coulisseau correspondant 6 et dont la tige est reliée au crochet 53 de commande du déplacement axial.Similarly, as shown in the Figure 7, the axial position of each cylinder 2 is controlled by a sensor 69 whose body is fixed on the base 65 of the corresponding slide 6 and whose rod is connected to the displacement control hook 53 axial.

On voit que, grâce aux dispositions qui viennent d'être décrites et notamment la possibilité de blocage axial des empoises 3, 3', les vérins de cambrage 17, 34, peuvent être montés directement sur les empoises et restent donc bien centrés par rapport aux paliers, l'action de cambrage pouvant être exercée en même temps que le déplacement axial des cylindres de travail 2, 2'.We see that, thanks to the provisions that come to be described and in particular the possibility of blocking axial chocks 3, 3 ', the camber cylinders 17, 34, can be mounted directly on chocks and therefore remain well centered with respect to the bearings, the cambering action can be exercised at the same time as the axial displacement of the working cylinders 2, 2 '.

En outre, l'amplitude de réglage de l'écartement entre les cylindres de travail peut être importante, les dispositifs de commande du déplacement axial pouvant être positionnés immédiatement au niveau des cylindres correspondants. In addition, the range of adjustment of the spacing between the working cylinders can be important, the axial displacement control devices which can be positioned immediately at the cylinders correspondents.

On sait, par ailleurs, que les cylindres et, en particulier les cylindres de travail, doivent être périodiquement démontés pour permettre leur vérification, leur entretien et leur remplacement éventuel.We also know that the cylinders and, in especially the working cylinders, must be periodically dismantled to allow their verification, their maintenance and possible replacement.

A cet effet, une cage de laminoir est généralement munie, à certains niveaux, de glissières horizontales sur lesquelles peuvent reposer, de façon constante, des parties d'appui correspondantes des empoises de chaque cylindre.For this purpose, a rolling stand is generally fitted, at certain levels, with horizontal slides on which can rest, constantly, corresponding support parts of the chocks of each cylinder.

D'autre part, les deux cylindres de travail sont, généralement, retirés en même temps de la cage, le cylindre supérieur reposant sur le cylindre inférieur.On the other hand, the two working cylinders are, usually removed from the cage at the same time upper cylinder resting on the lower cylinder.

Dans l'installation selon l'invention, lorsque l'on désire démonter la paire de cylindres de travail 2, 2', on abaisse, tout d'abord, le cylindre supérieur 2 jusqu'au contact avec le cylindre inférieur 2', dans la position représentée sur la Figure 1. Les deux coulisseaux 6 sont descendus au même niveau par les vérins 66. Comme on l'a représenté sur la vue de détail de la Figure 6, chaque coulisseau supérieur 6 est équipé d'un crochet 7 qui peut s'engager, à la descente du coulisseau 6, sur un crochet correspondant 71 monté pivotant, autour d'un axe horizontal, sur le coulisseau inférieur 6' et associé à un ressort 73, le crochet 71 pouvant être ouvert par un vérin auxiliaire 72.In the installation according to the invention, when one wish to disassemble the pair of working cylinders 2, 2 ', first lower the upper cylinder 2 until contact with the lower cylinder 2 ', in the position shown in Figure 1. Both slides 6 are lowered to the same level by the cylinders 66. As shown in the detail view of Figure 6, each upper slide 6 is equipped a hook 7 which can engage, on the descent of the slide 6, on a corresponding hook 71 mounted swiveling around a horizontal axis on the slide lower 6 'and associated with a spring 73, the hook 71 can be opened by an auxiliary cylinder 72.

Les vérins de déplacement axial 5 ramènent alors les deux cylindres de travail 2, 2', en position extrême vers la droite, comme indiqué sur la demi-vue supérieure de la Figure 4. Dans cette position, la tige 36 n'est engagée dans l'alésage 46 de l'empoise auxiliaire 4 que par son extrémité qui est munie d'une gorge 37 placée au niveau de la face postérieure de l'empoise 4. Celle-ci est équipée d'un levier d'accrochage 8 monté pivotant, sur l'empoise 4, autour d'un axe 81 et prolongé par un bras 82 qui maintient le crochet 8 en position ouverte, contre l'action d'un ressort 83, lorsque le crochet de déplacement 53 est engagé sur la partie latérale 45 de l'empoise 4.The axial displacement cylinders 5 then bring the two working rolls 2, 2 ', in the extreme position towards the right, as shown in the upper half-view of the Figure 4. In this position, the rod 36 is engaged in the bore 46 of the auxiliary chock 4 only by its end which is provided with a groove 37 placed at the level of the posterior face of the chock 4. This is fitted with a latching lever 8 pivotally mounted, on the chock 4, around an axis 81 and extended by an arm 82 which holds the hook 8 in the open position, against the action of a spring 83, when the hook of displacement 53 is engaged on the lateral part 45 of the chick 4.

On commande alors, au moyen des vérins 66, la remontée des coulisseaux supérieurs 6 qui entraínent avec eux les coulisseaux inférieurs 6' grâce aux crochets 7, 71.We then control, by means of the jacks 66, the raising of the upper slides 6 which drive with them the lower slides 6 'thanks to the hooks 7, 71.

Chaque levier d'accrochage 8 est, en outre, muni d'une encoche 84 qui peut s'engager dans la gorge 37 de la tige 36 sous l'action du ressort 83 lorsque le levier 8 est libéré par la remontée du crochet correspondant 53.Each attachment lever 8 is, moreover, provided a notch 84 which can engage in the groove 37 of the rod 36 under the action of the spring 83 when the lever 8 is released by raising the corresponding hook 53.

De la sorte, les cylindres de travail 2 et 2' se trouvent solidarisés en translation axiale avec leurs empoises correspondantes 3, 3', par l'intermédiaire des empoises auxiliaires 4, 4', et des tiges 36.In this way, the working cylinders 2 and 2 'are find themselves secured in axial translation with their corresponding chocks 3, 3 ', via the auxiliary chocks 4, 4 ', and rods 36.

Il est ainsi possible de retirer de la cage les deux cylindres de travail 2, 2', avec leurs empoises.It is thus possible to remove the two working cylinders 2, 2 ', with their chocks.

Par une opération inverse, on introduit dans la cage une nouvelle paire de cylindres de travail équipés de leurs empoises de support 3 et d'empoises auxiliaires 4 solidarisées axialement par les leviers d'accrochage 8 et les tiges 36.By a reverse operation, we introduce into the cage a new pair of working cylinders fitted with their support chocks 3 and auxiliary chocks 4 secured axially by the hooking levers 8 and the rods 36.

Lorsque les cylindres sont en place, on abaisse simultanément les quatre coulisseaux 6 et 6' et les crochets correspondants 53 viennent s'engager sur les parties extrêmes 45 des empoises auxiliaires 4, 4', en repoussant les bras 82 des leviers d'accrochage 8 qui sont ainsi libérés automatiquement. Chaque cylindre de travail 2, 2', peut alors être réglé individuellement.When the cylinders are in place, we lower simultaneously the four slides 6 and 6 'and the corresponding hooks 53 come to engage on the end parts 45 of the auxiliary chocks 4, 4 ′, in pushing the arms 82 of the hooking levers 8 which are released automatically. Each cylinder of work 2, 2 ', can then be adjusted individually.

D'autre part, lorsque la paire de cylindres de travail 2, 2', a été retirée, il est possible d'abaisser de nouveau en position basse les quatre coulisseaux 6, 6', de façon à permettre le démontage du cylindre d'appui supérieur 20.On the other hand, when the pair of cylinders of work 2, 2 ', has been removed, it is possible to lower again in the low position the four slides 6, 6 ', so as to allow disassembly of the support cylinder higher 20.

Bien entendu, l'invention ne se limite pas au mode de réalisation qui vient d'être décrit en détail, d'autres dispositions analogues pouvant être envisagées sans s'écarter du cadre de protection défini par les revendications.Of course, the invention is not limited to the mode of realization which has just been described in detail, others analogous provisions which can be envisaged without deviate from the protective framework defined by claims.

En particulier, on a décrit l'invention dans le cadre d'un laminoir Quarto et pour le déplacement axial des cylindres de travail, mais les mêmes dispositions pourraient être applicables à tout type de laminoir et à d'autres cylindres, par exemple les cylindres d'appui ou les cylindres intermédiaires dans un laminoir Sexto.In particular, the invention has been described in the context of a Quarto rolling mill and for the axial displacement of working cylinders but the same layouts could be applicable to any type of rolling mill and other cylinders, for example the support cylinders or the intermediate rolls in a Sexto rolling mill.

Les signes de référence, insérés après les caractéristiques techniques mentionnées dans les revendications, ont pour seul but de faciliter la compréhension de ces dernières et n'en limitent aucunement la portée.The reference signs, inserted after the technical characteristics mentioned in the claims are intended only to facilitate the understanding and limiting them in no way the scope.

Claims (15)

  1. Axial displacement rolling mill comprising, inside a stand (1) having two spaced uprights (11) at least two superposed rolls (2, 2') between which is conveyed the product to he rolled and each carried by two aligned trunnions (22) mounted so as to be able to rotate, respectively, by means of supporting bearings (31) each housed in a retaining chock (3) guided on a window (13) of the corresponding upright (11) of the stand (1), parallel to a clamping plane (P2) in which are substantially located the axes of the rolls (2, 2'), the rolling mill comprising means (5) for commanding the axial displacement of at least one of the roll (2) with respect to the opposite roll (2') according to the width of the product to be rolled with an axial slide of the trunnions of the said moveable roll (2) in the respective chocks (3) thereof which remain fixed axially with respect to the corresponding uprights of the stand (1), said means (5) for commanding the axial displacement hearing on a drive element (4) mounted so as to he able to rotate on a end of one of the trunnions (22) of said moveable roll (2) and axially integral with said latter, characterized in that to match with a modification of the width of the product to be rolled, the roll (2) axially moveable can move moreover in parallel to itself and on a great opening way along the vertical clamping plane (P2) with a corresponding displacement of the retaining chocks (3) guided on the windows (13) of the stand (1) as well as the drive element (4) and in that said means (5) for commanding the axial displacement are provided with a removable engagement element (53) on the drive element (4) and are mounted on a support (6) liable to slide in parallel to said clamping plane (P2) and associated with means (66) for the positionning of said means (5) for commanding the axial displacement substantially at the level of the roll (2) for engaging the removable engagement element (53) on the drive element (4) of the roll.
  2. The rolling mill according to claim 1, characterized in that the means (5) for commanding the axial displacement comprise, for each moveable roll (2, 2') at least one hydraulic jack (5) whose body is fixed onto the sliding support (6) and in that the removable engagement element (53) is fixed at the end of the rod (52) of the jack (5) and is sliding mounted onto the support (6) in parallel with the axis of the roll (2)
  3. The rolling mill according to claim 2, characterized in that the means (5) for commanding axial displacement comprise, at least for the roll (2) whose height can he varied, two jacks (5a, 5b) placed symmetrically either side of the clamping plane (P2) and liable to he commanded in synchronism, said jacks (5a, 5b) being mounted respectively on two supports (6a, 6b) moveable in synchronism and associated, respectively, with means (53a, 53b) for engaging with, in a removable way, respectively, two lateral parts (45) of the drive element (4) extending symmetrically either side of the axis (x'x) of the roll (2).
  4. The rolling mill according to one of the preceding claims, characterized in that at least one of the sliding supports (6) is associated with a sensor (67) for referencing the position of said support (6), and with means (66) for commanding the sliding of the support (6) along the upright (11) according to the indications from the sensor (67) for the adjustment of the position of said support (6) to the level of the roll (2) to be axially displaced and the engagement of axial displacement command means (5) with a drive element (4) rigidly locked axially with the roll (2) with the possibility of rotation.
  5. The rolling mill according to one of the preceding claims, characterized in that the drive element (4) of each axially moveable roll (2) comprises an auxiliary chock (4), mounted so as to rotate on an end portion (24) of the corresponding trunnions (22) of the roll (2) and axially locked with respect to said latter, said auxiliary chock (4) having at least one lug (44) liable to engage in a removable way in the engagement element (53) integral with the axial displacement means (5).
  6. The rolling mill according to Claim 5, characterized in that each engagement element (53) is mounted so as to slide on a slider (68) provided on the corresponding support (6) and parallel to the axis (x'x) of the roll (2).
  7. The rolling mill according to one of claims 5 and 6, characterized in that each engagement element (53) has a notch (54) in which a lateral part (45) of the lug (44) of the chock (4) engages and which extends perpendicularly to the axis (x'x) of the roll over the whole height of the engagement element (53) so as to allow a variation of the height of the chock (4) with respect to the support (6).
  8. The rolling mill according to one of claims 5 to 7, characterized in that the auxiliary chock (4) has a boring (46) in which a rod (36) can slide, said rod being fixed onto the retaining chock (3) of the trunnion (22) and extending parallel to the axis (x'x) of the roll, said rod (36) serving to hold the auxiliary chock (4) without interfering with the axial displacements of said auxiliary chock with the roll.
  9. The rolling mill according to one of Claims 5 to 8, characterized in that each retaining chock (3) of a working roll (2) is locked axially on the corresponding upright (11) of the stand (1) by a removable rigid interlocking means (18) and is associated with removable means (8) ensuring rigid axial interlocking with the roll (2) to allow the removal of said roll (2) with its chocks (3a, 3b).
  10. The rolling mill according to claim 9, characterized in that the removable means (8) ensuring rigid axial interlocking of the retaining chock (3) is made up of a lever (8) mounted so as to be able to rotate about an axis (81) on the auxiliary chock (4) and has a notch (84) liable to engage in a groove (37) provided on the retaining rod (36) of the auxiliary chock (4), said notch (84) disengaging from the groove (37) by a rotation of said lever (8) which is controlled by the engagement of the auxiliary chock (4) in the engagement element (53) of the displacement jack (5).
  11. The rolling mill according to claim 4, characterized in that in the case where the heights of one of the pressure rolls (20') and of the corresponding working roll (2') only slightly vary when in service, the means (5') commanding the axial displacement of said working roll (2') are mounted on a support (6') which remains at the level of said roll (2') and serves as a reference for the adjustment of the position in height of the support (6) of the axial displacement means (5) of the other working roll (2).
  12. The rolling mill according to claim 11, characterized in that it comprises removable means (7, 71) for rigidly locking the supports (6') of substantially constant level with the supports (6) of adjustable level allowing said supports (6,6') to he spaced apart together from the level of the working rolls (2, 2') with which they are respectively associated, in order to allow the removal of said working rolls with their retaining chocks (3,3') and auxiliary chocks (4,4').
  13. The rolling mill according to one of the preceding claims, characterized in that each working roll (2, 2') is associated with bending means (7, 34) which hear directly on its retaining chocks (3,3').
  14. The rolling mill according to claim 13, characterized in that the bending means (17) in the relative space apart direction of the chocks (3,3') are made up of jacks (17) each comprising two elements which hear in opposite directions, respectively, on the retaining chocks (3, 3') of two rolls, said jacks (17) having, on the one hand, a range of adjustment compatible with the possibilities of variation of the gap between the two working rolls (2,2') and on the other hand, being dimensioned so as to able to exert the bending forces.
  15. The rolling mill according to one of the preceding claims, characterized in that each supporting hearing (31) of a trunnion (22) of the moveable roll (2) is mounted on a socket (35) inserted with ability to slide axially on a slider (23) provided onto the trunnion (22) and extending along a length (L1) at least equal to the length (L2) of the retaining chock (3) increased with the maximum range (D) of axial displacement of the roll (2).
EP19940402057 1993-09-28 1994-09-14 Rolling mill with axially shifting rolls Expired - Lifetime EP0649686B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311523 1993-09-28
FR9311523A FR2710567B1 (en) 1993-09-28 1993-09-28 Axial displacement rolling mill.

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EP0649686A1 EP0649686A1 (en) 1995-04-26
EP0649686B1 true EP0649686B1 (en) 1998-06-17
EP0649686B2 EP0649686B2 (en) 2004-01-02

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JP (1) JPH07164015A (en)
CN (1) CN1050541C (en)
DE (1) DE69411117T3 (en)
FR (1) FR2710567B1 (en)
RU (1) RU94035662A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2851942B1 (en) * 2003-03-05 2006-04-28 METHOD FOR CHANGING THE CONFIGURATION OF A ROLLING MILL AND IMPROVED ROLLING MILL FOR IMPLEMENTING THE METHOD
DE102009060640A1 (en) * 2009-07-07 2011-01-13 Sms Siemag Ag Cluster arm arrangement for the intermediate roll sets of 18 HS rolling stands
AT509455B1 (en) * 2010-07-27 2011-09-15 Andritz Ag Maschf ROLLING RACK WITH ROLLER BEARING
CN102553925A (en) * 2011-12-31 2012-07-11 太原重工股份有限公司 Double-roller continuous pipe rolling mill
CN102927856B (en) * 2012-11-12 2014-07-30 浙江南泰科技有限公司 Firecracker leading wire handpiece
JP6151936B2 (en) * 2013-03-13 2017-06-21 株式会社 英田エンジニアリング Roll stand
FR3010332B1 (en) * 2013-09-12 2015-10-02 Fives Dms CASSETTE FOR ROLLING MILL AND ROLLING MACHINE EQUIPPED WITH SUCH A CASSETTE
CN104014592B (en) * 2014-06-18 2015-12-16 济南重工股份有限公司 A kind of two-roller skew-rolling rolling mill roller device mechanism for axial adjusting
CN107350291B (en) * 2016-05-10 2020-03-31 北新集团建材股份有限公司 Roller device
CN107649518B (en) * 2017-11-07 2023-07-18 扬州诚德重工有限公司 Horizontal four-roller rolling mill
CN110000213B (en) * 2019-04-19 2020-10-16 扬州顺达重工设备有限公司 Rolling mill convenient to change roll
CN112404135B (en) * 2020-10-14 2022-12-02 沈阳中钛装备制造有限公司 Automatic roll changing rolling mill for rolling pipes and working method
CN116351884B (en) * 2023-03-10 2024-07-02 中国机械总院集团北京机电研究所有限公司 Roller clamping mechanism and cross wedge rolling mill

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1038509B (en) * 1956-08-09 1958-09-11 Huettenwerk Rheinhausen Ag Device for holding and adjusting the pitch rollers in the axial direction on high-speed continuous roller lines
US3475940A (en) * 1967-07-18 1969-11-04 Mesta Machine Co Fall-away spacer block
US3822081A (en) * 1973-03-08 1974-07-02 Morgan Construction Co Axial roll adjustment means
JPS57177810A (en) * 1981-04-24 1982-11-01 Ishikawajima Harima Heavy Ind Co Ltd Rolling mill
JPS60238009A (en) * 1984-05-10 1985-11-26 Mitsubishi Heavy Ind Ltd Roll oscillation device of rolling mill
JPS62286608A (en) * 1986-06-03 1987-12-12 Ono Roll Seisakusho:Kk Rolling mill
DE3638330A1 (en) * 1986-11-10 1988-05-19 Schloemann Siemag Ag ROLLING DEVICES WITH A DEVICE FOR THE AXIAL SHIFTING OF ADJUSTABLE ROLLERS
DE3638331C2 (en) * 1986-11-10 1995-07-13 Schloemann Siemag Ag Roll stand for rolling flat material with a pair of axially displaceable work rolls
FR2611541B1 (en) * 1987-02-27 1994-04-29 Clecim Sa DEVICE FOR ADJUSTING THE PROFILE AND DISTRIBUTION OF WEAR OF CYLINDERS IN A ROLLER WITH AXIALLY MOVABLE CYLINDERS

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DE69411117D1 (en) 1998-07-23
CN1107393A (en) 1995-08-30
DE69411117T3 (en) 2004-08-12
CN1050541C (en) 2000-03-22
JPH07164015A (en) 1995-06-27
DE69411117T2 (en) 1998-11-19
EP0649686B2 (en) 2004-01-02
RU94035662A (en) 1996-08-10
EP0649686A1 (en) 1995-04-26
FR2710567A1 (en) 1995-04-07
FR2710567B1 (en) 1995-12-22

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