EP0178233A1 - Variable crown roll for machines for thermo-mechanical treatment - Google Patents

Variable crown roll for machines for thermo-mechanical treatment Download PDF

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Publication number
EP0178233A1
EP0178233A1 EP85401985A EP85401985A EP0178233A1 EP 0178233 A1 EP0178233 A1 EP 0178233A1 EP 85401985 A EP85401985 A EP 85401985A EP 85401985 A EP85401985 A EP 85401985A EP 0178233 A1 EP0178233 A1 EP 0178233A1
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EP
European Patent Office
Prior art keywords
hoop
annular cavity
shaft
internal
cylinder according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85401985A
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German (de)
French (fr)
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EP0178233B1 (en
Inventor
André Quehen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clecim SAS
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Clecim SAS
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Publication date
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Publication of EP0178233A1 publication Critical patent/EP0178233A1/en
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Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/05—Sleeved rolls with deflectable sleeves

Definitions

  • the subject of the present invention is a variable convex cylinder, in particular for thermo-mechanical treatment lines for strip products, for example rolling or leveling trains.
  • variable domed cylinders comprising a shaft and a hoop adjusted to shrink on the shaft, and an annular cavity of a determined width and depth which is formed between the shaft and the hoop .
  • this cavity is introduced, by a passage in the shaft, a fluid under pressure in order to control the value of the doming of the cylinder by adjusting the pressure of the fluid.
  • variable convex cylinder the drive of the hoop and the sealing of the fluid in the cavity are generally ensured only by the adjustment of said hoop on the shaft.
  • the invention therefore relates to a variable cam cylinder making it possible to improve on the one hand the drive torque between the inflatable hoop and the shaft, and on the other hand the fluid tightness under pressure in the annular cavity.
  • variable crown cylinder comprises a thin internal hoop sealingly mounted in the annular cavity of the cylinder shaft and a radial passage for introducing a pressurized fluid, opening into the annular cavity. below the internal hoop.
  • variable convex cylinder according to the invention comprises a shaft 1 and an inflatable hoop 2 adjusted to retraction on said shaft 1.
  • the shaft 1 has on its outer periphery, at the level of the hoop 2, an annular cavity 3 of determined depth. In this cavity 3 is placed an internal hoop 4 constituted by a thin sheet. The internal hoop 4 is welded at 5 to the edges of the annular cavity 3 and forms with the external cylindrical face of the shaft 1 a continuous surface in contact with the internal wall of the hoop 2.
  • the bottom 30 of the annular cavity 3, below the internal hoop 4 communicates by a radial passage 6 with a duct 7 for supplying a pressurized fluid, which opens at one end of the shaft 1.
  • the internal hoop 4 has a thickness equal to the depth of the annular cavity 3; the bottom 30 thereof can advantageously be provided with grooves 8, for example in spider legs, which facilitate the distribution of the fluid under pressure below the internal hoop 4 for inflation thereof.
  • the metal sheet previously machined, constituting the internal hoop 4 is introduced into the cavity 3 and welding is carried out, on the one hand, of the two contiguous edges of said sheet to obtain a continuous cylindrical sheet, and on the other hand its lateral edges on the edges of the annular cavity of the shaft.
  • the internal hoop 4 is therefore secured to the shaft 1.
  • the hoop 2 is introduced on the shaft 1.
  • the sealing of the pressurized fluid is ensured directly by the welds 5 between the internal hoop 4 and the cavity 3.
  • the convexity of the hoop 2 can be modified by varying the pressure of the fluid. Furthermore, the tightening of the two hoops together increases with the pressure of the fluid, which is favorable for driving the external hoop 2.
  • the internal hoop 4 When the fluid pressure is cut or reduced, below a certain limit, the internal hoop 4 returns to its initial shape, in alignment with the outer periphery of the shaft 1 and comes to rest on the bottom of the annular cavity 3.
  • the outer hoop 2 is then rigidly held by the shaft 1 which constitutes a continuous cylindrical support over its entire length.

Abstract

1. Variable-crown roll of thermo-mechanical processing machines for strip product such as metal-strip rolling mills, comprising a central arbor (1), an inflatable sleeve (2) shrink-fitted on the said arbor (1) and an annular cavity (3) of specific depth between the said arbor (1) and the said inflatable sleeve (2), characterized in that it also incorporates a thin inner sleeve (4) mounted so as to be sealed off in the annular cavity (3) of the arbor (1), and a radial passage (6 - 7) for introducing a pressure fluid and which opens into the annular cavity (3) underneath the inner sleeve (4).

Description

La présente invention a pour objet un cylindre à bombé variable notamment pour des lignes de traitement thermo-mécanique des produits en bande, par exemple des trains de laminage ou de planage.The subject of the present invention is a variable convex cylinder, in particular for thermo-mechanical treatment lines for strip products, for example rolling or leveling trains.

On sait que les forces nécessaires pour obtenir l'allongement désiré et/ou la réduction d'épaisseur du métal au cours du laminage de tôles ou de bandes métalliques sont très importantes et entraînent une flexion des cylindres de travail. On empêche les cylindres de travail de subir une trop forte flexion due à la pression de laminage, par des cylindres d'appui de diamètre plus important et généralement on compense la flèche par des ajustements du bombé des cylindres d'appui ou par d'autres moyens d'ajustement direct du bombé des cylindres de travail.It is known that the forces necessary to obtain the desired elongation and / or reduction in the thickness of the metal during the rolling of metal sheets or strips are very large and cause bending of the working rolls. The working rollers are prevented from undergoing too much bending due to the rolling pressure, by support rolls of larger diameter and generally the deflection is compensated by adjustments of the convexity of the support rolls or by other means for direct adjustment of the crown of the working rolls.

Un ajustement en continu est possible avec des cylindres à bombé variable comprenant un arbre et une frette ajustée à retrait sur l'arbre, et une cavité annulaire d'une largeur et d'une profondeur déterminées qui est formée entre l'arbre et la frette. Dans cette cavité est introduit, par un passage dans l'arbre, un fluide sous pression afin de contrôler la valeur du bombement du cylindre en ajustant la pression du fluide.Continuous adjustment is possible with variable domed cylinders comprising a shaft and a hoop adjusted to shrink on the shaft, and an annular cavity of a determined width and depth which is formed between the shaft and the hoop . In this cavity is introduced, by a passage in the shaft, a fluid under pressure in order to control the value of the doming of the cylinder by adjusting the pressure of the fluid.

Mais dans ce genre de cylindre à bombé variable, l'entraînement de la frette et l'étanchéité du fluide dans la cavité sont généralement assurés uniquement par l'ajustage de ladite frette sur l'arbre.However, in this type of variable convex cylinder, the drive of the hoop and the sealing of the fluid in the cavity are generally ensured only by the adjustment of said hoop on the shaft.

L'invention se rapporte donc à un cylindre à bombé variable permettant d'améliorer d'une part le couple d'entraînement entre la frette gonflable et l'arbre, et d'autre part l'étanchéité du fluide sous pression dans la cavité annulaire.The invention therefore relates to a variable cam cylinder making it possible to improve on the one hand the drive torque between the inflatable hoop and the shaft, and on the other hand the fluid tightness under pressure in the annular cavity.

Suivant l'invention, le cylindre à bombé variable comprend une frette interne mince montée de manière étanche dans la cavité annulaire de l'arbre du cylindre et un passage radial d'introduction d'un fluide sous pression, débouchant dans la cavité annulaire au-dessous de la frette interne.According to the invention, the variable crown cylinder comprises a thin internal hoop sealingly mounted in the annular cavity of the cylinder shaft and a radial passage for introducing a pressurized fluid, opening into the annular cavity. below the internal hoop.

On décrira à présent, à titre d'exemple non limitatif, une forme de réalisation préférée de l'invention, en référence au dessin unique annexé, qui représente, en coupe longitudinale, un cylindre à bombé variable conforme à l'invention.A preferred embodiment of the invention will now be described, by way of non-limiting example, with reference to the single appended drawing, which represents, in longitudinal section, a variable convex cylinder in accordance with the invention.

Sur la figure, le cylindre à bombé variable selon l'invention comprend un arbre 1 et une frette gonflable 2 ajustée à retrait sur ledit arbre 1.In the figure, the variable convex cylinder according to the invention comprises a shaft 1 and an inflatable hoop 2 adjusted to retraction on said shaft 1.

L'arbre 1 comporte sur son pourtour extérieur, au niveau de la frette 2, une cavité annulaire 3 de profondeur déterminée. Dans cette cavité 3 est placée une frette interne 4 constituée par une tôle de faible épaisseur. La frette interne 4 est soudée en 5 sur les rebords de la cavité annulaire 3 et forme avec la face cylindrique extérieure de l'arbre 1 une surface continue en contact avec la paroi interne de la frette 2.The shaft 1 has on its outer periphery, at the level of the hoop 2, an annular cavity 3 of determined depth. In this cavity 3 is placed an internal hoop 4 constituted by a thin sheet. The internal hoop 4 is welded at 5 to the edges of the annular cavity 3 and forms with the external cylindrical face of the shaft 1 a continuous surface in contact with the internal wall of the hoop 2.

Le fond 30 de la cavité annulaire 3, au-dessous de la frette interne 4 communique par un passage radial 6 avec un conduit 7 d'alimentation d'un fluide sous pression, qui débouche à une extrémité de l'arbre 1.The bottom 30 of the annular cavity 3, below the internal hoop 4 communicates by a radial passage 6 with a duct 7 for supplying a pressurized fluid, which opens at one end of the shaft 1.

De préférence, la frette interne 4 a une épaisseur égale à la profondeur de la cavité annulaire 3 ; le fond 30 de celle-ci pouvant avantageusement être muni de rainures 8, par exemple en pattes d'araignée, qui facilitent la répartition du fluide sous pression au-dessous de la frette interne 4 pour le gonflage de celle-ci.Preferably, the internal hoop 4 has a thickness equal to the depth of the annular cavity 3; the bottom 30 thereof can advantageously be provided with grooves 8, for example in spider legs, which facilitate the distribution of the fluid under pressure below the internal hoop 4 for inflation thereof.

Le montage des frettes 2 et 4 sur l'arbre 1 s'effectue de la manière suivante :The mounting of the frets 2 and 4 on the shaft 1 is carried out as follows:

Après usinage de la cavité annulaire 3 dans l'arbre 1, la tôle métallique préalablement usinée, constituant la frette interne 4, est introduite dans la cavité 3 et on procède au soudage, d'une part des deux bords jointifs de ladite tôle pour obtenir une tôle cylindrique continue, et d'autre part de ses bords latéraux sur les rebords de la cavité annulaire de l'arbre. La frette interne 4 est donc solidaire de l'arbre 1. Puis, on introduit la frette 2 sur l'arbre 1.After machining the annular cavity 3 in the shaft 1, the metal sheet previously machined, constituting the internal hoop 4, is introduced into the cavity 3 and welding is carried out, on the one hand, of the two contiguous edges of said sheet to obtain a continuous cylindrical sheet, and on the other hand its lateral edges on the edges of the annular cavity of the shaft. The internal hoop 4 is therefore secured to the shaft 1. Then, the hoop 2 is introduced on the shaft 1.

Le fluide sous pression introduit dans le fond 30 de la cavité annulaire 3 par la conduite 7 et le passage radial 6 dilate la frette interne 4 qui elle-même gonfle la frette externe 2. L'étanchéité du fluide sous pression est assurée directement par les soudures 5 entre la frette interne 4 et la cavité 3. La convexité de la frette 2 peut être modifiée en jouant sur la pression du fluide. Par ailleurs, le serrage des deux frettes entre elles augmente avec la pression du fluide, ce qui est favorable pour l'entraînement de la frette externe 2.The pressurized fluid introduced into the bottom 30 of the annular cavity 3 through the pipe 7 and the radial passage 6 expands the internal hoop 4 which itself inflates the external hoop 2. The sealing of the pressurized fluid is ensured directly by the welds 5 between the internal hoop 4 and the cavity 3. The convexity of the hoop 2 can be modified by varying the pressure of the fluid. Furthermore, the tightening of the two hoops together increases with the pressure of the fluid, which is favorable for driving the external hoop 2.

Lorsque la pression du fluide est coupée ou diminuée, au-dessous d'une certaine limite, la frette interne 4 reprend sa forme initiale, dans l'alignement du pourtour extérieur de l'arbre 1 et vient s'appuyer sur le fond de la cavité annulaire 3.When the fluid pressure is cut or reduced, below a certain limit, the internal hoop 4 returns to its initial shape, in alignment with the outer periphery of the shaft 1 and comes to rest on the bottom of the annular cavity 3.

La frette externe 2 est alors maintenue rigidement par l'arbre 1 qui constitue un appui cylindrique continu sur toute sa longueur.The outer hoop 2 is then rigidly held by the shaft 1 which constitutes a continuous cylindrical support over its entire length.

Dans cette réalisation particulièrement simple d'un cylindre à bombé variable pour machines de traitement thermo-mécanique, on voit que le frottement entre les deux frettes et par conséquent le couple d'entraînement entre l'arbre et la frette gonflable augmente quand la pression du fluide croît. Avec cette disposition, on obtient une meilleure étanchéité du fluide grâce au soudage de la frette interne dans l'arbre du cylindre, ce qui permet d'éviter des dispositifs d'étanchéité complémentaires, et notamment des joints qui peuvent se détériorer à la longue.In this particularly simple realization of a variable convex cylinder for thermo-mechanical treatment machines, it can be seen that the friction between the two hoops and consequently the driving torque between the shaft and the inflatable hoop increases when the pressure of the fluid increases. With this arrangement, a better fluid tightness is obtained by welding the internal hoop in the cylinder shaft, which makes it possible to avoid additional sealing devices, and in particular seals which can deteriorate over time.

Il est bien entendu que la description qui précède n'a été donnée qu'à titre purement illustratif et non limitatif et que des variantes et des modifications peuvent y être apportées sans sortir du cadre de protection défini défini par les revendications.It is understood that the foregoing description has been given purely by way of non-limiting illustration and that variants and modifications may be made thereto without departing from the defined protective framework defined by the claims.

Claims (5)

1. Cylindre à bombé variable de machines de traitement thermomécanique de produits en bande notamment des trains de laminage des bandes métalliques comprenant un arbre central, une frette gonflable ajustée à retrait sur ledit arbre, et une cavité annulaire de profondeur déterminée entre ledit arbre et ladite frette gonflable,
caractérisé par le fait qu'il comprend également une frette interne mince (4) montée de manière étanche dans la cavité annulaire (3) de l'arbre (1) et un passage radial (6-7), d'introduction d'un fluide sous pression, débouchant dans la cavité annulaire (3) au-dessous de la frette interne (4).1. Variable convex cylinder of machines for thermomechanical treatment of strip products, in particular rolling trains for metal strips comprising a central shaft, an inflatable hoop adjusted to shrink on said shaft, and an annular cavity of determined depth between said shaft and said inflatable fret,
characterized by the fact that it also comprises a thin internal hoop (4) mounted in leaktight manner in the annular cavity (3) of the shaft (1) and a radial passage (6-7), for introducing a pressurized fluid, opening into the annular cavity (3) below the internal hoop (4). 2. Cylindre selon la revendication 1, caractérisé par le fait que la frette interne (4) est soudée sur les rebords latéraux de la cavité interne (3), lesdites soudures assurant l'étanchéité du fluide sous pression.2. Cylinder according to claim 1, characterized in that the internal hoop (4) is welded to the lateral edges of the internal cavity (3), said welds ensuring the tightness of the fluid under pressure. 3. Cylindre selon l'une quelconque des revendications précédentes, caractérisé par le fait que la frette interne (4) est constituée par une tôle métallique de faible épaisseur.3. Cylinder according to any one of the preceding claims, characterized in that the internal hoop (4) is constituted by a thin metal sheet. 4. Cylindre selon la revendication 3, caractérisé par le fait que la frette interne (4) a une épaisseur égale à la profondeur de la cavité annulaire (3) de façon à s'appuyer suee fond (30) de celle-ci lorsque la pression de fluide est coupée.4. Cylinder according to claim 3, characterized in that the internal hoop (4) has a thickness equal to the depth of the annular cavity (3) so as to bear on the bottom (30) thereof when the fluid pressure is shut off. 5. Cylindre selon la revendication 4, caractérisé par le fait que le fond (30) de la cavité annulaire (3) est muni d'au moins une rainure (8) de répartition du fluide sous pression au-dessous de la frette interne (4).5. Cylinder according to claim 4, characterized in that the bottom (30) of the annular cavity (3) is provided with at least one groove (8) for distributing the pressurized fluid below the internal hoop ( 4).
EP19850401985 1984-10-12 1985-10-11 Variable crown roll for machines for thermo-mechanical treatment Expired EP0178233B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8415663A FR2571637B1 (en) 1984-10-12 1984-10-12 VARIABLE BOMB CYLINDER FOR THERMO-MECHANICAL TREATMENT MACHINES
FR8415663 1984-10-12

Publications (2)

Publication Number Publication Date
EP0178233A1 true EP0178233A1 (en) 1986-04-16
EP0178233B1 EP0178233B1 (en) 1988-08-10

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EP19850401985 Expired EP0178233B1 (en) 1984-10-12 1985-10-11 Variable crown roll for machines for thermo-mechanical treatment

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EP (1) EP0178233B1 (en)
DE (1) DE3564201D1 (en)
FR (1) FR2571637B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3625802A1 (en) * 1986-07-30 1988-02-04 Bhs Bayerische Berg Roller with adjustable sag for the pressure treatment of webs of material, in particular for the one-sided corrugated-board machine
FR2670410A1 (en) * 1990-12-14 1992-06-19 Cleciml PLANT FOR ROLLING FLAT PRODUCTS.
CN113664075A (en) * 2021-07-18 2021-11-19 盐城工学院 Variable camber roll panel forming device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018242B2 (en) * 1978-11-13 1985-05-09 住友金属工業株式会社 Rolling roll with movable sleeve
JPS58196105A (en) * 1982-05-11 1983-11-15 Sumitomo Metal Ind Ltd Variable crown roll
JPS59101207A (en) * 1982-11-30 1984-06-11 Ishikawajima Harima Heavy Ind Co Ltd Roll for rolling mill

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 4, no. 108 (M-24) [590], 5 août 1980; & JP - A - 55 68106 (SUMITOMO KINZOKU KOGYO K.K.) 22-05-1980 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 216 (M-329) [1653], 3 octobre 1984; & JP - A - 59 101 207 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.) 11-06-1984 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 40 (M-278) [1477], 21 février 1984; & JP - A - 58 196 105 (SUMITOMO KINZOKU KOGYO K.K.) 15-11-1983 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3625802A1 (en) * 1986-07-30 1988-02-04 Bhs Bayerische Berg Roller with adjustable sag for the pressure treatment of webs of material, in particular for the one-sided corrugated-board machine
FR2670410A1 (en) * 1990-12-14 1992-06-19 Cleciml PLANT FOR ROLLING FLAT PRODUCTS.
EP0493171A1 (en) * 1990-12-14 1992-07-01 Clecim Equipment for rolling flat products
CN113664075A (en) * 2021-07-18 2021-11-19 盐城工学院 Variable camber roll panel forming device

Also Published As

Publication number Publication date
FR2571637A1 (en) 1986-04-18
FR2571637B1 (en) 1987-01-30
DE3564201D1 (en) 1988-09-15
EP0178233B1 (en) 1988-08-10

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