EP0072765A1 - Tool changing device on a pilgrim rolling mill - Google Patents

Tool changing device on a pilgrim rolling mill Download PDF

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Publication number
EP0072765A1
EP0072765A1 EP82420109A EP82420109A EP0072765A1 EP 0072765 A1 EP0072765 A1 EP 0072765A1 EP 82420109 A EP82420109 A EP 82420109A EP 82420109 A EP82420109 A EP 82420109A EP 0072765 A1 EP0072765 A1 EP 0072765A1
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EP
European Patent Office
Prior art keywords
rolling mill
cylinders
plane
frame
axes
Prior art date
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Granted
Application number
EP82420109A
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German (de)
French (fr)
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EP0072765B1 (en
Inventor
François Grandemange
Michel Couturier
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Vallourec SA
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Vallourec SA
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Priority to AT82420109T priority Critical patent/ATE17664T1/en
Publication of EP0072765A1 publication Critical patent/EP0072765A1/en
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Publication of EP0072765B1 publication Critical patent/EP0072765B1/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
    • 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
    • B21B31/14—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by pivotally displacing

Definitions

  • the tool change device object of the invention, relates to rolling mills with crawl steps intended to laminate long pieces such as tubes or bars, or similar elements. Although it can also be applied to rolling mills with hot vocational steps, it more particularly relates to rolling mills with cold vocational steps.
  • the cage supporting the rolls of the rolling mill is moved alternately with respect to the product to be rolled in synchronism with the rotation of the cylinders, while the product to be rolled is intermittently advanced in the passage between the cylinders.
  • the working rolls of these rolling mills consist of rolled rolls in chocks generally carried by the cage which, moved in an alternating movement along the rolling axis, ensures by fixed racks the rotation of the rolls on the product to laminate and strictly maintains these rolls in position, by opposing by its structure the efforts to separate said rolls during rolling.
  • a first method consists in manually intervening on the standstill cage positioned in the rolling mill. In the case of hoop cylinders, it is then possible, without removing the cylinder block, to remove the hoops. This intervention is delicate and dangerous because of the confinement of the device, the environment linked to the lubrication of the device and the weight of the parts to be handled. Furthermore, since we are already working on the stand of the rolling mill, we cannot proceed simultaneously on the stand or in the vicinity of it to other operations for changing auxiliary tools, such as tube clamps, etc ... which has the effect of extending the overall tool change time.
  • Another known method consists, when the rolling mill is stopped, the assembly of the two working rolls with their chocks being integral, to fix this assembly on a frame which slides laterally, relative to the rolling mill.
  • This frame most often permanently associated with the rolling mill, takes the assembly of the two cylinders in the rolling mill stand and after having released it from the cage, moves it laterally relative to the rolling mill.
  • This known device greatly facilitates the maintenance of rolling mills by allowing the change of part or part of the working rolls outside the stand of the rolling mill proper.
  • the two working cylinders are kept superimposed and mechanically secured one above the other, as in their working position, in the cage. To have access to the lower working cylinder, it is necessary to remove the entire upper cylinder with its chocks and its tools. It is then necessary to transport to the tool shop, the assembly of the two mounted cylinders in order to change the cylinders.
  • the object of the present invention is an improved device making it possible to change all or part of the working rolls even more easily, in particular in the case of rolls comprising hoops or shells.
  • This invention consists of a rolling mill with successive steps comprising a frame associated with the rolling mill which slides laterally with respect to said rolling mill and thus allows the extraction of the integral assembly of the cylinders and their annexes, tilting means being provided and arranged to so as to be able to act on this frame on which is fixed all the cylinders and their annexes, so as to tilt the plane which passes through the axes of the cylinders until this plane reaches the desired inclination.
  • the tilting means make it possible to tilt the plane while retaining the imitation orientation of the axes of the cylinders.
  • we tilt the. plane to the horizontal or to the vicinity of the horizontal.
  • tilting means can be a cradle mounted either on rollers which move on rails having an appropriate curvature, or on an axis around which it can pivot or any other known means allowing a rotation associated or not with a translation of the passing plane. by the axis of the cylinders.
  • the figures and the example below describe in a nonlimiting manner a particular embodiment of the invention.
  • Figure 4 shows the same device in side view and in section through the median plane AA of Figure 2 after tilting the frame, the axes of the working rolls then being in a horizontal plane for changing the hoops.
  • FIG 1 there is a rolling mill (1) with civil steps comprising a cage whose amounts are seen in (2 and 3), two working rolls (4 and 4 ') with their chocks (5-5' - 6 -6 ') and their rotational drive gears (7-7').
  • the two cylinders (4-4 ') and their chocks (5-5' - 6-6 ') are joined in a known manner by rods and bolts.
  • (6A) the housing of the heads thereof.
  • all of the cylinders (4-4 '), their chocks (5-5' - 6-6 ') and their drive pinions (7-7') came out of the cage of the rolling mill (1) and fixed on a frame (8) which slides laterally with respect to the whole rolling mill (1) according to the prior art.
  • This device makes it possible, after having raised the front rack (9) to easily leave the rolling mill stand (1) all of the two cylinders (4-4 1 ) etcb their annexes. We see however that to have access to the lower cylinder (4) and its chocks (5,6), it is necessary to remove the upper cylinder (4 ') and its annexes (5', 6 ', 7'). The area in which the assembly of the two cylinders is then does not allow, in view of the general mechanical design of the rolling mill, which is very dense in this part adjacent to the rolling mill proper, to make complex and multiple handling operations such as for example the provisional deposition of the upper cylinder.
  • the solution then consists, taking into account the delicate problems posed by the adjustment of the two superimposed cylinder blocks to transport the assembly (4-4 ') with its annexes (5-5' --6-6 '- 7-7' ) in the tool shop.
  • the handling of such an assembly is made difficult by its very large mass which, for a large rolling mill can be of the order of 8 to 10 tonnes.
  • FIGs 2, 3 and 4 there is shown a rolling mill with cold crawl steps (10), comprising a cage (11), equipped according to the invention.
  • the assembly of the two working cylinders (12-12 ') of their chocks (13-13'-14-14') and of their rotational drive pinions (15-15 ') is mounted on a frame (16 ), which can itself be secured with a cradle (17), mounted on a horizontal axis (18) parallel to the axes working rolls and therefore perpendicular to the rolling axis.
  • This axis (18) allows the cradle (17), the frame (16) and the set of two cylinders (12-12 ') with their annexes, to pivot by rotation in a vertical plane parallel to the rolling axis , that is to say the axis of movement of the parts to be laminated, the axes of the cylinders (12-12 ') retaining the same orientation.
  • the two frets, lower (20) and upper (20 ') can be changed on site without having to dismantle the entire upper cylinder (12') and its annexes.
  • the adjustment and setting of the two frets (20-20 ') is done relative to the shafts (21-21') of each of the working cylinders (12-12 ') without having to move or adjust the relative position of the shafts (21-21 ') themselves, nor the rest of the cylinders (12-12').
  • the work of changing the frets (20-20 ') and their annexes is greatly facilitated.
  • the lateral drive device for the frame (16) is shown diagrammatically in FIG. 2 by a telescopic jack (22).
  • the frame (16) also comprises a jack (23) actuating a device of inclined shims which allows, according to a known technique, to release all of the cylinders (12-12 ') and their annexes when they are taken to take them remove from the stand (11) of the rolling mill (10).
  • the tilting device of the frame (16) by the cradle (17) is designed so as to take advantage of the little space available and not to hinder the passage of the mechanical devices of the rolling mill. This is and a bore (24) in the base (25) is provided to allow the passage of the shaft controlling the rotation of the product to be laminated.
  • the kinematics control assembly of the rolling mill (rolling kinematics, rotation kinematics, advance kinematics) as well as the entire tool change device is located on the same side of the rolling mill relative to the plane vertical passing through the rolling axis, thus completely freeing the other side.
  • the device for controlling the rotation of the cradle (17) around the axis (18) is not shown. It can be carried out in various ways well known to those skilled in the art. It is also understood that the frame (16) is designed so that it can successively move laterally, to ensure the extraction of the integral assembly of the cylinders, the cage (11) of the rolling mill (10) , then freely tilt with the cradle (17).
  • said cradle (17) has a side face (26).
  • the face (26) of the cradle (17) comes to bear on a stop (27).
  • the use of the device is easily understandable by examining FIGS. 2, 3 and 4.
  • the chocks (13-13 '- 14-14') are held together 2 to 2 by not shown connecting means.
  • the set of cylinders is released from the cage (11) by the action of the jack (23).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Crushing And Grinding (AREA)
  • Toys (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Turning (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

1. A pilgrim-type cold rolling mill and with mobile housing, comprising a frame associated with the rolling mill which slides laterally relative to said rolling mill and thus allows withdrawal of the integral assembly of rolls and their associated mechanisms, characterized in that rocking means constituted by a cradle mounted on a spindle or on rollers, are capable of acting on the said frame with its assembly of rolls and their associated mechanisms so as to incline the plane containing the axes of the rolls until this plane reaches the desired inclination.

Description

Le dispositif de changement d'outillage, objet de l'invention, concerne les laminoirs à pas de pélerin destinés à laminer des pièces longues telles que des tubesnu des barres, ou des éléments analogues. Bien qu'il puisse s'appliquer aussi aux laminoirs à pas de pélerin à chaud, il concerne plus particulièrement les laminoirs à pas de pélerin à froid.The tool change device, object of the invention, relates to rolling mills with pilgrim steps intended to laminate long pieces such as tubes or bars, or similar elements. Although it can also be applied to rolling mills with hot pilgrim steps, it more particularly relates to rolling mills with cold pilgrim steps.

Comme l'expose, par exemple, le brevet français FR 1 602 013, dans les laminoirs de ce type, la cage supportant les cylindres du laminoir est animée d'un mouvement alternatif par rapport au produit à laminer en synchronisme'avec la rotation des cylindres, tandis que le produit à laminer est avancé de façon intermittente dans le passage entre les cylindres. Les cylindres de travail de ces laminoirs sont constitués de cylindres montés à roulement dans des empoises portées en général par la cage qui, mue d'un mouvement alternatif selon l'axe de laminage, assure par des crémaillères fixes la rotation des cylindres sur le produit à laminer et maintient strictement ces cylindres en position, en s'opposant par sa structure aux efforts d'écartement desdits cylindres pendant le laminage. Ces cylindres de travail comportent des cannelures qui donnent aux pièces laminées la forme souhaitée ; ils sont soit monobloc, on parlera alors de cylindres à cannelures circulaires, soit pourvus de frettes ou coquilles cannelées venant se fixer sur un bloc de fixation monté à demeure, on parlera alors de cylindres à cannelures semi-circulaires.As explained, for example, in French patent FR 1 602 013, in rolling mills of this type, the cage supporting the rolls of the rolling mill is moved alternately with respect to the product to be rolled in synchronism with the rotation of the cylinders, while the product to be rolled is intermittently advanced in the passage between the cylinders. The working rolls of these rolling mills consist of rolled rolls in chocks generally carried by the cage which, moved in an alternating movement along the rolling axis, ensures by fixed racks the rotation of the rolls on the product to laminate and strictly maintains these rolls in position, by opposing by its structure the efforts to separate said rolls during rolling. These working rolls have grooves which give the laminated parts the desired shape; they are either monobloc, we will then speak of cylinders with circular grooves, or provided with grooved frets or shells coming to be fixed on a fixing block mounted permanently, we will then speak of cylinders with semi-circular grooves.

Dans la marche courante des laminoirs ci-dessus, il est nécessaire de pouvoir procéder aisément au changement des cylindres de travail ou de leurs frettes par exemple pour changer les dimensions à laminer, rectifier les cannelures usées ou entretenir le laminoir. Ce changement des cylindres de travail ou de leurs frettes, effectué par les méthodes classiques est une opération longue, délicate, et qui a l'inconvénient d'immobiliser le laminoir en le rendant improductif pendant un temps assez long. Cette opération sera d'autant plus dangereuse pour le personnel que le poids des cylindres est important, ce qui est le cas des gros laminoirs par exemple ceux capables de prendre des ébauches tubulaires de diamètre extérieur 200 mm dont les cylindres peuvent atteindre des dimensions de l'ordre de 700 mm de diamètre, les frettes pesant de l'ordre de 500 à 700 kg.In the current operation of the above rolling mills, it is necessary to be able to easily change the working rolls or their frets for example to change the dimensions to be laminated, to rectify the used grooves or to maintain the rolling mill. This change of working rolls or their frets, carried out by conventional methods is a long, delicate operation, and which has the drawback of immobilizing the rolling mill by making it unproductive for a fairly long time. This operation will be all the more dangerous for the personnel that the weight of the cylinders is important, which is the large rolling mills, for example those capable of taking tubular blanks with an outside diameter of 200 mm, the cylinders of which can reach dimensions of the order of 700 mm in diameter, the hoops weighing of the order of 500 to 700 kg.

Il existe déjà différentes méthodes de changement des cylindres ou de leurs frettes sur des laminoirs existants.There are already different methods of changing the rolls or their frets on existing rolling mills.

Une première méthode consiste à intervenir manuellement sur la cage arrêtée et positionnée dans le laminoir. Dans le cas des cylindres à frettes, on peut alors, sans retirer le bloc cylindre, enlever les frettes. Cette intervention est délicate et dangereuse du fait du confinement du dispositif, de l'environnement lié à la lubrification du dispositif et du poids des pièces à manutentionner. Par ailleurs étant donné que l'on travaille déjà sur la cage du laminoir, on ne peut pas procéder simultanément sur la cage ou au voisinage de celle-ci à d'autres opérations de changement d'outillages annexes, tels que pince-tubes, etc... ce qui a pour effet de prolonger le temps global de changement d'outillage.A first method consists in manually intervening on the standstill cage positioned in the rolling mill. In the case of hoop cylinders, it is then possible, without removing the cylinder block, to remove the hoops. This intervention is delicate and dangerous because of the confinement of the device, the environment linked to the lubrication of the device and the weight of the parts to be handled. Furthermore, since we are already working on the stand of the rolling mill, we cannot proceed simultaneously on the stand or in the vicinity of it to other operations for changing auxiliary tools, such as tube clamps, etc ... which has the effect of extending the overall tool change time.

Une autre méthode connue consiste, lorsque le laminoir est arrêté, l'ensemble des deux cylindres de travail avec leurs empoises étant solidaires, à fixer cet ensemble sur un bâti qui coulisse latéralement, par rapport au laminoir. Ce bâti, le plus souvent associé de façon permanente au laminoir, vient prendre l'ensemble des deux cylindres dans la cage du laminoir et après l'avoir dégagé de la cage, le déplace latéralement par rapport au laminoir. Ce dispositif connu facilite grandement l'entretien des laminoirs en permettant le changement de font ou partie des cylindres de travail en dehors de la cage du laminoir proprement dite. Cependant, avec ce dispositif, on maintient les deux cylindres de travail superposés et solidarisés mécaniquement l'un au-dessus de l'autre, comme dans leur position de travail, dans la cage. Pour avoir accès au cylindre de travail inférieur, il est nécessaire d'enlever l'ensemble du cylindre supérieur avec ses empoises et son outillage. Il faut alors transporter à l'atelier d'outillage, l'ensemble des deux cylindres montés pour procéder au changement des cylindres.Another known method consists, when the rolling mill is stopped, the assembly of the two working rolls with their chocks being integral, to fix this assembly on a frame which slides laterally, relative to the rolling mill. This frame, most often permanently associated with the rolling mill, takes the assembly of the two cylinders in the rolling mill stand and after having released it from the cage, moves it laterally relative to the rolling mill. This known device greatly facilitates the maintenance of rolling mills by allowing the change of part or part of the working rolls outside the stand of the rolling mill proper. However, with this device, the two working cylinders are kept superimposed and mechanically secured one above the other, as in their working position, in the cage. To have access to the lower working cylinder, it is necessary to remove the entire upper cylinder with its chocks and its tools. It is then necessary to transport to the tool shop, the assembly of the two mounted cylinders in order to change the cylinders.

L'objet de la présente invention est un dispositif perfectionné permettant de changer plus facilement encore tout ou partie des cylindres de travail, en particulier dans le cas de cylindres comportant des frettes ou coquilles.The object of the present invention is an improved device making it possible to change all or part of the working rolls even more easily, in particular in the case of rolls comprising hoops or shells.

Cette invention consiste en un laminoir à pas de pélerin comprenant un bâti associé au laminoir qui coulisse latéralement par rapport audit laminoir et permet ainsi l'extraction de l'ensemble solidaire des cylindres et de leurs annexes, des moyens de basculement étant prévus et disposés de façon à pouvoir agir sur ce bâti sur lequel est fixé l'ensemble des cylindres et de leurs annexes, de façon à incliner le plan qui passe par les axes des cylindres jusqu'à ce que ce plan atteigne l'inclinaison voulue. Le plus souvent, les moyens de basculement permettent d'incliner le plan tout en conservant l'orientation imitiale des axes des cylindres. Préférentiellement, on incline le. plan jusqu'à l'horizontale ou jusqu'au voisinage de l'horizontale.This invention consists of a rolling mill with pilgrim steps comprising a frame associated with the rolling mill which slides laterally with respect to said rolling mill and thus allows the extraction of the integral assembly of the cylinders and their annexes, tilting means being provided and arranged to so as to be able to act on this frame on which is fixed all the cylinders and their annexes, so as to tilt the plane which passes through the axes of the cylinders until this plane reaches the desired inclination. Most often, the tilting means make it possible to tilt the plane while retaining the imitation orientation of the axes of the cylinders. Preferably, we tilt the. plane to the horizontal or to the vicinity of the horizontal.

Ces moyens de basculement peuvent être un berceau monté soit sur des galets qui se déplacent sur des rails ayant une courbure appropriée, soit sur un axe autour duquel il peut pivoter ou tout autre moyen connu permettant une rotation associée ou non à une translation du plan passant par l'axe des cylindres. Les figures et l'exemple ci-âpres décrivent de façon non limitative un mode particulier de réalisation de l'invention.These tilting means can be a cradle mounted either on rollers which move on rails having an appropriate curvature, or on an axis around which it can pivot or any other known means allowing a rotation associated or not with a translation of the passing plane. by the axis of the cylinders. The figures and the example below describe in a nonlimiting manner a particular embodiment of the invention.

  • La figure 1 représente schématiquement en vue cavalière un dispositif de changement de cylindres par montage sur un bâti coulissant de l'art antérieur.FIG. 1 schematically represents in a side view a device for changing cylinders by mounting on a sliding frame of the prior art.
  • La figure 2 représente en coupe perpendiculaire à l'axe de laminage un dispositif selon l'invention.Figure 2 shows in section perpendicular to the rolling axis a device according to the invention.
  • La figure 3 représente le même dispositif en vue latérale, selon l'axe XX' de la figure 2 du dispositif de basculement, les axes des cylindres se trouvant dans un plan vertical avant basculement.Figure 3 shows the same device in side view, along the axis XX 'of Figure 2 of the tilting device, the axes of the cylinders being in a vertical plane before tilting.

La figure 4 représente le même dispositif en vue latérale et en coupe par le plan médian AA de la figure 2 après basculement du bâti, les axes des cylindres de travail étant alors dans un plan horizontal pour changement des frettes.Figure 4 shows the same device in side view and in section through the median plane AA of Figure 2 after tilting the frame, the axes of the working rolls then being in a horizontal plane for changing the hoops.

En figure 1, on distingue un laminoir (1) à pas de pélerin comportant une cage dont on voit les montants en (2 et 3), deux cylindres de travail (4 et 4') avec leurs empoises (5-5' - 6-6') et leurs pignons d'entraînement en rotation (7-7'). Les deux cylindres (4-4') et leurs empoises (5-5' - 6-6') sont solidarisés de façon connue par des tiges et des boulons. On aperçoit en (6A) les logements des têtes de ceux-ci. Dans cette figure, l'ensemble des cylindres (4-4'), de leurs empoises (5-5' - 6-6') et de leurs pignons d'entraînement (7-7'), est sorti de la cage du laminoir (1) et fixé sur un bâti (8) qui coulisse latéralement par rapport à l'ensemble du laminoir (1) selon l'art antérieur. Ce dispositif permet, après avoir relevé la crémaillère avant (9) de sortir assez aisément de la cage du laminoir (1) l'ensemble des deux cylindres (4-41)etcb leurs annexes. On voit cependant que pour avoir accès au cylindre inférieur (4) et à ses empoises (5,6), il faut enlever le cylindre supérieur (4') et ses annexes (5', 6', 7'). La zone dans laquelle se trouve alors l'ensemble des deux cylindres ne permet pas, vue la conception générale mécanique du laminoir,très dense dans cette partie voisine du laminoir proprement dit, de faire des manutentions complexes et multiples comme par exemple le dépôt provisoire du cylindre supérieur. La solution consiste alors , compte tenu des problèmes délicats posés par le réglage des deux blocs-cylindres superposés à transporter l'ensemble (4-4') avec ses annexes (5-5' --6-6' - 7-7') dans l'atelier d'oùtillage. Mais la manipulation d'un tel ensemble est rendue difficile par sa masse très importante qui, pour un gros laminoir peut être de l'ordre de 8 à 10 tonnes.In Figure 1, there is a rolling mill (1) with pilgrim steps comprising a cage whose amounts are seen in (2 and 3), two working rolls (4 and 4 ') with their chocks (5-5' - 6 -6 ') and their rotational drive gears (7-7'). The two cylinders (4-4 ') and their chocks (5-5' - 6-6 ') are joined in a known manner by rods and bolts. We see in (6A) the housing of the heads thereof. In this figure, all of the cylinders (4-4 '), their chocks (5-5' - 6-6 ') and their drive pinions (7-7'), came out of the cage of the rolling mill (1) and fixed on a frame (8) which slides laterally with respect to the whole rolling mill (1) according to the prior art. This device makes it possible, after having raised the front rack (9) to easily leave the rolling mill stand (1) all of the two cylinders (4-4 1 ) etcb their annexes. We see however that to have access to the lower cylinder (4) and its chocks (5,6), it is necessary to remove the upper cylinder (4 ') and its annexes (5', 6 ', 7'). The area in which the assembly of the two cylinders is then does not allow, in view of the general mechanical design of the rolling mill, which is very dense in this part adjacent to the rolling mill proper, to make complex and multiple handling operations such as for example the provisional deposition of the upper cylinder. The solution then consists, taking into account the delicate problems posed by the adjustment of the two superimposed cylinder blocks to transport the assembly (4-4 ') with its annexes (5-5' --6-6 '- 7-7' ) in the tool shop. However, the handling of such an assembly is made difficult by its very large mass which, for a large rolling mill can be of the order of 8 to 10 tonnes.

En figures 2, 3 et 4, est représenté un laminoir à pas de pélerin à froid (10), comportant une cage (11), équipé suivant l'invention. L'ensemble des deux cylindres de travail (12-12') de leurs empoises (13-13'-14-14') et de leurs pignons d'entraînement en rotation (15-15') est monté sur un bâti (16), qui peut être lui-même solidarisé avec un berceau (17),monté sur un axe horizontal (18) parallèle aux axes des cylindres de travail et donc perpendiculaire à l'axe de laminage. Cet axe (18) permet au berceau (17), au bâti (16) et à l'ensemble des deux cylindres (12-12') avec leurs annexes, de basculer par rotation dans un plan vertical parallèle à l'axe de laminage, c'est-à-dire l'axe du déplacement des pièces à laminer, les axes des cylindres (12-12') conservant la même orientation.In Figures 2, 3 and 4, there is shown a rolling mill with cold pilgrim steps (10), comprising a cage (11), equipped according to the invention. The assembly of the two working cylinders (12-12 ') of their chocks (13-13'-14-14') and of their rotational drive pinions (15-15 ') is mounted on a frame (16 ), which can itself be secured with a cradle (17), mounted on a horizontal axis (18) parallel to the axes working rolls and therefore perpendicular to the rolling axis. This axis (18) allows the cradle (17), the frame (16) and the set of two cylinders (12-12 ') with their annexes, to pivot by rotation in a vertical plane parallel to the rolling axis , that is to say the axis of movement of the parts to be laminated, the axes of the cylinders (12-12 ') retaining the same orientation.

On voit figures 3 et 4, que ce dispositif est particulièrement avantageux pour les laminoirs dont les cylindres (12-12') ne travaillent que par rotation d'un demi-tour et dont, par suite, les cannelures de travail (19-19') peuvent être tracées sur des frettes amovibles (20-20') en forme de demi-coquilles. Ces frettes (20-20') constituent alors des pièces d'usure que l'on peut remplacer relativement fréquemment et facilement. Leur poids est faible par rapport à l'ensemble, de l'ordre de 500 à 700 kg par demi-coquille. En position horizontale du berceau (17), comme représenté en figure 4, les deux frettes (20-20') relativement légères peuvent être manipulées l'une et l'autre par une simple potence de service (P) de capacité inférieure à une tonne. Le changement des deux frettes, inférieure (20) et supérieure (20') peut se faire sur place sans avoir à démonter l'ensemble du cylindre supérieur (12') et de ses annexes. Le réglage et le calage des deux frettes (20-20') se font par rapport aux arbres (21-21') de chacun des cylindres de travail (12-12') sans avoir à déplacer, ni régler la position relative des arbres (21-21') eux-mêmes, ni du reste des cylindres (12-12'). Le travail de changement des frettes (20-20') et de leurs annexes est grandement facilité.We see Figures 3 and 4, that this device is particularly advantageous for rolling mills whose cylinders (12-12 ') work only by rotation of a half-turn and whose, consequently, the working grooves (19-19 ') can be traced on removable frets (20-20') in the form of half-shells. These frets (20-20 ') then constitute wearing parts which can be replaced relatively frequently and easily. Their weight is low compared to the whole, of the order of 500 to 700 kg per half-shell. In the horizontal position of the cradle (17), as shown in FIG. 4, the two relatively light hoops (20-20 ') can be manipulated both by a simple service bracket (P) of capacity less than one tonne. The two frets, lower (20) and upper (20 ') can be changed on site without having to dismantle the entire upper cylinder (12') and its annexes. The adjustment and setting of the two frets (20-20 ') is done relative to the shafts (21-21') of each of the working cylinders (12-12 ') without having to move or adjust the relative position of the shafts (21-21 ') themselves, nor the rest of the cylinders (12-12'). The work of changing the frets (20-20 ') and their annexes is greatly facilitated.

Le dispositif d'entraînement latéral du bâti (16) est représenté schématiquement en figure 2 par un vérin téléscopique (22). Le bâti (16) comporte également un vérin (23) actionnant un dispositif de cales inclinées qui permet selon une technique connue, de dégager l'ensemble des cylindres (12-12') et leurs annexes lorsque l'on vient les prendre pour les retirer de la cage (11) du laminoir (10).The lateral drive device for the frame (16) is shown diagrammatically in FIG. 2 by a telescopic jack (22). The frame (16) also comprises a jack (23) actuating a device of inclined shims which allows, according to a known technique, to release all of the cylinders (12-12 ') and their annexes when they are taken to take them remove from the stand (11) of the rolling mill (10).

Le dispositif de basculement du bâti (16) par le berceau (17) est conçu de manière à tirer parti du peu d'espace disponible et à ne pas gêner le passage des dispositifs mécaniques du laminoir. C'est ainsi qu'un alésage (24) dans le socle (25) est prévu pour permettre le passage de l'arbre commandant la rotation du produit à laminer.The tilting device of the frame (16) by the cradle (17) is designed so as to take advantage of the little space available and not to hinder the passage of the mechanical devices of the rolling mill. This is and a bore (24) in the base (25) is provided to allow the passage of the shaft controlling the rotation of the product to be laminated.

Ainsi, l'ensemble de commande cinématique du laminoir (cinématique de laminage, cinématique de rotation, cinématique d'avance) ainsi que l'ensemble du dispositif de changement d'outillage se trouve situé d'un même côté du laminoir par rapport au plan vertical passant par l'axe de laminage, libérant ainsi totalement l'autre côté.Thus, the kinematics control assembly of the rolling mill (rolling kinematics, rotation kinematics, advance kinematics) as well as the entire tool change device is located on the same side of the rolling mill relative to the plane vertical passing through the rolling axis, thus completely freeing the other side.

Le dispositif de commande de la rotation du berceau (17) autour de l'axe (18) n'est pas représenté. Il peut être réalisé de différentes façons bien connues de l'homme de l'art. Il est bien entendu par ailleurs que le bâti (16) est conçu de telle façon qu'il puisse successivement se déplacer latéralement, pour assurer l'extraction de l'ensemble solidaire des cylindres, de la cage (11) du laminoir (10), puis librement basculer avec le berceau (17).The device for controlling the rotation of the cradle (17) around the axis (18) is not shown. It can be carried out in various ways well known to those skilled in the art. It is also understood that the frame (16) is designed so that it can successively move laterally, to ensure the extraction of the integral assembly of the cylinders, the cage (11) of the rolling mill (10) , then freely tilt with the cradle (17).

Pour soutenir les empoises (13-13' - 14-14') au cours du basculement du berceau (17), comme représenté aux figures 3 et 4, ledit berceau (17) comporte une face latérale (26).To support the chocks (13-13 '- 14-14') during the tilting of the cradle (17), as shown in Figures 3 and 4, said cradle (17) has a side face (26).

En fin de course, la face (26) du berceau (17) vient en appui sur une butée (27). L'utilisation du dispositif est facilement compréhensible par l'examen des figures 2, 3 et 4. Pour une opération, par exemple de changement des frettes (20-20') on commence par relever la crémaillère (28). Les empoises (13-13' - 14-14') sont maintenues solidaires 2 à 2 par des moyens de liaison non représentés. On avance le bâti (16) sous les cylindres (12-12') et les empoises inférieures (13-14). On dégage de la cage (11) l'ensemble des cylindres par action du vérin (23). Par action du vérin (22), on retire latéralement dans le sens de la flèche F, l'ensemble des cylindres (12-12') et leurs annexes reposant sur le bâti (16), comme représenté en figures 2 et 3. Lorsque le bâti (16) est suffisamment écarté, et que les cylindres (12-12') se trouvent au-dessus du berceau (17), on fait basculer celui-ci autour de son axe (18) qui entraîne en rotation l'énsemble du bâti (16) et des cylindres (12-12'). On voit figure 4 que, en fin de course, les axes des cylindres (12-12') se trouvent dans un même plan sensiblement horizontal, le berceau (17) étant en appui sur la butée (27). On peut ainsi effectuer aisément toutes opérations de changement des frettes (20-20'). On remet enfin les deux cylindres (12-12') et leurs annexes en place dans la cage de laminoir (11) par des opérations inverses de basculement du berceau (17) puis de translation du bâti (16).At the end of the race, the face (26) of the cradle (17) comes to bear on a stop (27). The use of the device is easily understandable by examining FIGS. 2, 3 and 4. For an operation, for example changing the hoops (20-20 '), one begins by raising the rack (28). The chocks (13-13 '- 14-14') are held together 2 to 2 by not shown connecting means. We advance the frame (16) under the cylinders (12-12 ') and the lower chocks (13-14). The set of cylinders is released from the cage (11) by the action of the jack (23). By the action of the jack (22), the set of cylinders (12-12 ') and their annexes resting on the frame (16) are removed laterally in the direction of the arrow F, as shown in FIGS. 2 and 3. When the frame (16) is sufficiently spaced apart, and that the cylinders (12-12 ') are located above the cradle (17), the latter is tilted around its axis (18) which rotates the assembly frame (16) and cylinders (12-12 '). We see in Figure 4 that, at the end of the stroke, the axes of the cylinders (12-12 ') are in the same sensitive plane ment horizontal, the cradle (17) being supported on the stop (27). It is thus easy to carry out any operations for changing the frets (20-20 '). Finally, the two cylinders (12-12 ′) and their annexes are replaced in place in the rolling stand (11) by reverse operations of tilting the cradle (17) then translating the frame (16).

Ainsi, dans le cas d'un laminoir à pas de pélerin incorporant le dispositif objet de 1 'invention, permettant de produire des tubes finis de 150 mm de diamètre extérieur, on a constaté que, pour des cylindres comportant des frettes en demi-coquilles de 700 mm de diamètre extérieur, le temps global de changement d'outillage (ce temps incluant le changement d'outillages annexes, tels que les pince-tubes) est divisé environ par deux par rapport au temps nécessaire pour réaliser les mêmes opérations pour un laminoir classique, selon l'une ou l'autre des techniques décrites dans l'art antérieur.Thus, in the case of a pilgrim pitch rolling mill incorporating the device which is the subject of the invention, making it possible to produce finished tubes with an outside diameter of 150 mm, it has been found that, for cylinders comprising half-shell frets 700 mm outside diameter, the overall tool change time (this time including the change of auxiliary tools, such as pipe clamps) is approximately halved compared to the time required to perform the same operations for a conventional rolling mill, according to one or other of the techniques described in the prior art.

Bien que l'invention ait été décrite dans un cas particulier, elle recevra application pour tout laminoir à pas de pélerin mettant en oeuvre de tels dispositifs. Tel est le cas si par exemple le laminoir comporte en plus des cylindres de travail, des cylindres d'appui ou si les cylindres de travail comportent plusieurs cannelures réparties sur la longueur de la table.Although the invention has been described in a particular case, it will be applied to any rolling mill with pilgrim steps using such devices. This is the case if for example the rolling mill has in addition working rolls, support rolls or if the working rolls have several grooves distributed over the length of the table.

Claims (9)

1°) Laminoir à pas de pélerin comprenant un bâti associé au laminoir qui coulisse latéralement par rapport audit laminoir et permet ainsi l'extraction de l'ensemble solidaire des cylindres et de leurs annexes, caractérisé en ce que des moyens de basculement peuvent agir sur ce bâti sur lequel est fixé l'ensemble des cylindres et de leurs annexes, de façon à incliner le plan qui passe par les axes des cylindres, jusqu'à ce que ce plan atteigne l'inclinaison voulue.1) rolling mill with pilgrim steps comprising a frame associated with the rolling mill which slides laterally with respect to said rolling mill and thus allows the extraction of the integral assembly of the cylinders and their annexes, characterized in that tilting means can act on this frame on which is fixed all the cylinders and their annexes, so as to tilt the plane which passes through the axes of the cylinders, until this plane reaches the desired inclination. 2°) Laminoir à pas de pélerin suivant revendication 1, caractérisé en ce que les moyens de basculement permettent d'incliner le plan qui contient les axes des cylindres tout en conservant l'orientation initiale de ceux-ci.2) rolling mill with pilgrim's step according to claim 1, characterized in that the tilting means make it possible to tilt the plane which contains the axes of the rolls while retaining the initial orientation of the latter. 3°) Laminoir à pas de pélerin suivant revendication 1 ou 2, caractérisé en ce que les moyens de basculement permettent d'incliner jusqu'à l'horizontale le plan qui contient les axes des cylindres.3 °) rolling mill with pilgrim's step according to claim 1 or 2, characterized in that the tilting means allow the plane which contains the axes of the cylinders to be tilted up to horizontal. 4°) Laminoir selon l'une des revendications 1 à 3, caractérisé en ce que les moyens de basculement sont constitués par un berceau (17) monté sur un axe (18).4 °) rolling mill according to one of claims 1 to 3, characterized in that the tilting means are constituted by a cradle (17) mounted on an axis (18). 5°) Laminoir selon l'une des revendications 1 à 3, caractérisé eh ce que les moyens de basculement sont constitués par un berceau monté sur des galets.5 °) rolling mill according to one of claims 1 to 3, characterized eh that the tilting means are constituted by a cradle mounted on rollers. 6°) Laminoir selon l'une des revendications 1 à 5, caractérisé en ce que le socle portant le berceau est percé d'un alésage permettant le passage de l'arbre commandant la rotation du produit à laminer.6 °) rolling mill according to one of claims 1 to 5, characterized in that the base carrying the cradle is pierced with a bore allowing the passage of the shaft controlling the rotation of the product to be laminated. 7°) Laminoir selon l'une des revendications 1 à 6, caractérisé en ce que l'ensemble des dispositifs mécaniques du laminoir, cinématique de rotation, cinématique d'avance, cinématique de laminage, ainsi que le dispositif de basculement de l'ensemble solidaire des cylindres sont situés d'un même côté par rapport à un plan vertical passant par l'axe de laminage.7 °) rolling mill according to one of claims 1 to 6, characterized in that all the mechanical devices of the rolling mill, kinematics of rotation, kinematics of advance, kinematics of rolling, as well as the tilting device of the assembly integral with the cylinders are situated on the same side with respect to a vertical plane passing through the rolling axis. 8°) Procédé de changement de cylindres sur laminoir à pas de pélerin, dans lequel on extrait l'ensemble des cylindres et de leurs annexes de la cage du laminoir par translation d'un bâti, caractérisé en ce que après translation, on solidarise ce bâti sur lequel est fixé l'ensemble des cylindres et de leurs annexes, avec des moyens de basculement, puis on fait agir ces moyens de façon à incliner le plan passant par les axes des cylindres, jusqu'à ce que ce plan atteigne l'inclinaison voulue ou même le plus souvent l'horizontale, et en ce que on effectue alors les opérations nécessaires de démontage puis de réparation ou remplacement des frettes des cylindres, puis de remontage de ces frettes et en ce que après remontage les moyens de basculement sont utilisés pour ramener le plan passant par les axes des cylindres à la verticale puis en ce que on remet l'ensemble des cylindres et de leurs annexes dans la cage du laminoir par translation du bâti.8 °) Method of changing cylinders on a rolling mill with pilgrim steps, in which all the cylinders and their annexes are extracted from the rolling mill stand by translation of a frame, characterized in that after translation, this is secured frame on which all the cylinders and their annexes are fixed, with tilting means, then these means are made to act so as to tilt the plane passing through the axes of the cylinders, until this plane reaches the desired inclination or even most often the horizontal, and in that one then performs the necessary operations of disassembly then repair or replacement of the cylinder hoops, then reassembly of these hoops and in that after reassembly the tilting means are used to bring the plane passing through the axes of the cylinders to the vertical then in that we put all the cylinders and their annexes in the rolling mill stand by translation of the frame. 9°) Procédé suivant revendication 8, caractérisé en ce que les moyens de basculement permettent d'incliner le plan passant par les axes des cylindres tout en conservant l'orientation initiale de ceux-ci.9 °) Method according to claim 8, characterized in that the tilting means allow to tilt the plane passing through the axes of the cylinders while retaining the initial orientation thereof.
EP82420109A 1981-08-06 1982-07-30 Tool changing device on a pilgrim rolling mill Expired EP0072765B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420109T ATE17664T1 (en) 1981-08-06 1982-07-30 DEVICE FOR TOOL CHANGE ON PILGER ROLLING MILLS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8115571 1981-08-06
FR8115571A FR2510913A1 (en) 1981-08-06 1981-08-06 DEVICE FOR CHANGING TOOLS OF COLD ROLLING MILLS WITH NO PILGRIMS

Publications (2)

Publication Number Publication Date
EP0072765A1 true EP0072765A1 (en) 1983-02-23
EP0072765B1 EP0072765B1 (en) 1986-01-29

Family

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EP82420109A Expired EP0072765B1 (en) 1981-08-06 1982-07-30 Tool changing device on a pilgrim rolling mill

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EP (1) EP0072765B1 (en)
JP (1) JPS5829508A (en)
AT (1) ATE17664T1 (en)
DE (1) DE3268811D1 (en)
FR (1) FR2510913A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993251A (en) * 1989-07-07 1991-02-19 Sandvik Special Metals Corporation Rollstand having easily replaceable roll dies

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159206A (en) * 1983-02-28 1984-09-08 Mitsubishi Heavy Ind Ltd Supporting device of backup roll frame to be turned upside down
JPH0673043B2 (en) * 1986-03-19 1994-09-14 新王子製紙株式会社 Electrostatic recording body
JPH0617436A (en) * 1991-01-30 1994-01-25 Sanko Kensetsu Kogyo Kk Concrete structure
DE102015122701A1 (en) * 2015-12-23 2017-06-29 Sandvik Materials Technology Deutschland Gmbh Cold pilger rolling mill

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE541384C (en) * 1932-01-06 H C Gustav Asbeck Dr Ing Universal rolling mill
DE604909C (en) * 1932-01-01 1934-11-02 Hirsch Process for rolling tubes on pilgrim step rolling mills
DE848336C (en) * 1951-05-20 1952-09-04 Meer Ag Maschf Hot pilgrim stepping mill
FR1559326A (en) * 1967-03-30 1969-03-07

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE541384C (en) * 1932-01-06 H C Gustav Asbeck Dr Ing Universal rolling mill
DE604909C (en) * 1932-01-01 1934-11-02 Hirsch Process for rolling tubes on pilgrim step rolling mills
DE848336C (en) * 1951-05-20 1952-09-04 Meer Ag Maschf Hot pilgrim stepping mill
FR1559326A (en) * 1967-03-30 1969-03-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993251A (en) * 1989-07-07 1991-02-19 Sandvik Special Metals Corporation Rollstand having easily replaceable roll dies

Also Published As

Publication number Publication date
JPH0138562B2 (en) 1989-08-15
JPS5829508A (en) 1983-02-21
ATE17664T1 (en) 1986-02-15
EP0072765B1 (en) 1986-01-29
FR2510913A1 (en) 1983-02-11
FR2510913B1 (en) 1984-12-28
DE3268811D1 (en) 1986-03-13

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