EP1030746B1 - Procede de laminage de precision - Google Patents

Procede de laminage de precision Download PDF

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Publication number
EP1030746B1
EP1030746B1 EP98949818A EP98949818A EP1030746B1 EP 1030746 B1 EP1030746 B1 EP 1030746B1 EP 98949818 A EP98949818 A EP 98949818A EP 98949818 A EP98949818 A EP 98949818A EP 1030746 B1 EP1030746 B1 EP 1030746B1
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EP
European Patent Office
Prior art keywords
rolling
rolls
profile
stand
roll stand
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.)
Expired - Lifetime
Application number
EP98949818A
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German (de)
English (en)
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EP1030746A1 (fr
Inventor
Gerald Hein
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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Publication date
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Publication of EP1030746A1 publication Critical patent/EP1030746A1/fr
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
    • B21B13/103—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane for rolling bars, rods or wire
    • 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
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B2031/026—Transverse shifting 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
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • 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
    • B21B31/103—Manipulators or carriages therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/10—Driving arrangements for rolls which have only a low-power drive; Driving arrangements for rolls which receive power from the shaft of another roll

Definitions

  • the invention relates to a precision rolling process for producing rod-shaped or wire-shaped rolling stock with a circular cross-section, while maintaining tight form and Dimensional tolerances and a profile roller device for performing the method.
  • a known system consists of three duo mill stands in the sequence horizontal-vertical-horizontal. The round that runs out of the continuous rolling mill becomes in this system with the caliber sequence oval-oval-round with low degree of deformation to the desired one Finished dimension.
  • the disadvantages of this system are as follows:
  • the oval cross sections can be used known lead guides difficult.
  • the rolling stock tends to tilt, i.e. to Cross-sectional rotation, especially if the distance between the scaffolding is too large. Therefore, there is no guidance of the rolling stock between the stands and the Scaffold spacing chosen to be as small as possible.
  • the maintenance of the scaffolding is also complicated and cumbersome.
  • a third The disadvantage is the very complicated dimensional adjustment of the rolling calibers to the Finished dimensions because of the necessary consideration of the bearing play and dei thermal expansion of the scaffolding during operation.
  • Another system consists of two duo stands in the sequence vertical-horizontal, whereby the second stand has biased rollers.
  • the continuous Round mill tapering round with the oval-round caliber sequence to the desired finished size reshaped.
  • the bearing clearances Through the pre-tensioned rollers of the finishing stand, the bearing clearances and compensates for the thermal expansion of the scaffold.
  • a third system consists of a roll block with three roll stands, in each of which three Rollers are arranged at 120 ° to each other. That from the continuous rolling mill The round is rounded off with the trigon-trigon-round caliber sequence to the desired finished size reshaped.
  • the disadvantages lie on the one hand in the high mechanical outlay for the drive and synchronization of the three rollers per stand, on the other hand, in the fact that none Compensation of bearing play and thermal expansion of the scaffolding is ensured.
  • the fourth known system consists of two roll stands, each with four rolls, from which are each driven only one pair of rollers and the other by the rolling stock is dragged along.
  • the roll axes of the second roll stand are 45 ° opposite to that first arranged twisted.
  • This system also has the disadvantage of being difficult Presetting of the roll calibers because of the bearing play and thermal expansion must be taken into account. Further disadvantages result from the 45 ° rotation Drive position of the second scaffold, which requires a complicated mechanical drive.
  • Another disadvantage is that the non-driven roller pairs from the incoming Rolling stock must be accelerated to their working speed, from which a Damage to the base of the caliber can result.
  • the invention aims at avoiding these disadvantages and difficulties and presents itself the task of a precision rolling process for the production of rod-shaped rolling stock or To create wire with a circular cross section, which is a rolling stock with a particularly high Accuracy in a certain dimension, but still - contrary to the state of the art - there is good accessibility to each of the roll stands, so that in the event of a fault, the rolling can be continued again within a short time can, i.e. the operational readiness of the system can be restored as soon as possible and one easy maintenance are possible.
  • the rolling stock is preferably fed into two duo rolling stands arranged one behind the other rolled with a tetragonal cross section and between these two duo stands guided.
  • a rolling stand with a closed caliber is, for example, from DE-A-1 527 722 known. It has four disks, the work surfaces of which form a closed caliber. Two opposite disc rollers are driven, whereas the other two Disc rollers are moved over the material to be rolled. The disc rollers can can be adjusted against each other so that the size of the caliber is variable. Each disc roller is acted on by a different disc roller, one Displacement of the disc rollers in the radial direction of the other disc rollers Allows you to change the caliber. However, this means that the disc rollers can only be held against one another with relatively low forces, since there are no opposing forces can be applied to avoid bending of the disc rollers. On such a closed caliber is already without the additional force which caused by rolling, is difficult to use, permanently closed caliber form, but rather an undesirable dimensional change of the caliber occurs, so that the desired dimensioning of a rolling stock cannot be achieved.
  • a particularly advantageous embodiment according to the invention is characterized in that that two duo mill stands with a tetragonal roll caliber with an intermediate one Leadership are provided.
  • the invention is simple Realization of a caliber that is always closed, even under difficult rolling conditions the rollers of the further roll stand are supported against one another via conical surfaces, wherein the rollers with a setting force which exceeds the rolling force by a pretensioning force are pressed against each other.
  • a roll stand with a closed caliber of the type described above is in itself known, for example from EP-A-0 264 849.
  • the closed caliber preferably has a cross-sectional area, which is 5 to 20% less than that of the open caliber of the duo mill stand. hereby can even roll steel alloys with high deformation resistance particularly precisely be, due to the resulting low rolling forces also high Rolling speeds can be realized.
  • a preferred embodiment is characterized in that the further roll stand has four rollers, in particular disc rollers, of which only two face each other opposite rollers can be driven by a motor, in particular with a common motor, and that each of the four rollers has a conical surface on each conical surface of another roller, each roller on two adjacent Rolls abuts and a closed over the conical contact surfaces of the rollers Power flow and a friction drive for the rollers not driven by a motor established.
  • This provides a particularly advantageous frictional connection within the caliber, whereby by dividing the drive on the one hand as a positive drive via a motor, on the other
  • the rollers are synchronized with the simplest of means via the conical surfaces is.
  • the disc rollers ensure that the stress on the forming Areas of the rollers can be kept smaller due to the larger circumference.
  • the driven rollers of the further roll stand advantageously have a larger one Diameter in the forming surfaces than that does not have its own drive driven rollers, which makes the steel bars particularly easy in the further rolling stand can be initiated, so that especially in the head region of the steel bar the desired cross section is obtained particularly quickly.
  • they can be driven by a motor Rolling the further roll stand in the direction of its shaft against the two further rolls displaceable, whereby an exact positioning of the further roll stand with respect to the first and the guide is reached, so that the axis of the rolling stock in the rolling mill can be kept completely straight.
  • the further roll stand advantageously has two stand stands, which are mutually over Tie rods and threaded nuts are preloaded. This allows particularly high forces are applied so that a reduction in the Cross-sectional area of the rolling stock can be achieved and at the same time high Speeds can be realized.
  • the constructive training with Tie rod and threaded nut is a particularly simple design of the scaffold stand feasible, which is particularly reliable at the same time.
  • the threaded nuts are hydraulic nuts, the assembly of the same can be special easy, etc. done without additional tools.
  • the shaping surfaces of the rolls forming the closed caliber expediently point a chamfer on the adjoining circular edges. This is itself in the event of irregularities in the cross-sectional area of the rolling stock from the duo mill stand or speeds that have not been adjusted between the duo mill stand and the other Roll stand ensures an exact cross-sectional area of the rolling stock, the Strain on the forming surfaces of the further scaffold is kept particularly low.
  • a particularly simple design of the guide devices is through profile rollers characterized. These are expediently in pairs to form one of the cross-sectional shape of the caliber adapted to be guided. Furthermore, the profile rolls are in Depending on the length of the path, the required number is provided to form a roller conveyor.
  • FIG. 2 shows a schematic representation of two arranged one behind the other Roll stands of the profile rolling device according to the invention.
  • Fig. 3 illustrates one Section through the roll stand according to the line III / III of Fig. 2;
  • Fig. 4 shows a section through the roll stand according to the line IV / IV of FIG. 2, and
  • FIGS. 5a and 5b each illustrate an embodiment for a guide device between the Rolling mills. 6a to 6c the caliber sequence is according to another Embodiment shown.
  • the rolling stock 1 to be deformed, a bar steel is, starting from that in Fig. 1a Round cross section shown (dash-dotted lines in Fig. 1b) to a in essential square cross section by means of the rollers 3, 4 shown in Fig. 1b with Grooves 3a, 4a of a duo mill stand with open caliber 5 while reducing the Cross-sectional area reshaped.
  • This now square steel bar the same also can have a different polygonal cross-section, e.g. a triangular, five-edged or the like., comes in the closed caliber 6 shown in Fig. 1c with four Disc rollers 7, 8 and 9, 10, in which it again becomes a steel bar with a round cross section, however, high precision is rolled.
  • the disc rollers 7 to 10 have the caliber partial surfaces 11, 12 and 13, 14 adjacent areas conical surfaces, etc. 7a, 7b, 8a, 8b, 9a, 9b and 10a, 10b. These surfaces each include an opening angle ⁇ of 90 °, so that the individual Disc rollers 7 to 10 with the same truncated cone surfaces with minimal slip can be pressed against each other, which on the one hand forms a closed caliber and on the other hand the drive from one pair of disc rollers to the other Disc roller pair can be performed with high forces. As shown in Fig. 1d, the edges between the truncated cone surfaces 7a, 7b and the caliber partial surface 11 beveled so that a caliber is created that is still closed, but the Possibility to avoid surface pressure peaks.
  • the closed caliber which is shown in Fig. 1c, can also have any other shape, for example square or another polygonal cross-section, oval or the like.
  • the sequence of calibers 5 and 6 is in the sense of a uniform deformation make sure that the successive rolling passes are not always in the same or analog directions is deformed, but the deformation is normal, for example first deformation direction takes place, so that, based on the entire cross section, in substantially uniform deformations are present.
  • two rolling stands 15, 16 are arranged one behind the other in the rolling direction c shown, etc. a duo mill stand 15 with the open caliber 5 and a four-disc mill stand 16 with the closed caliber 6. Both are for better understanding Duo roll stand 15 and the four-disc roll stand 16 shown in elevation. Between the rolling stands are illustrated in a schematic representation of a rolling stock guide 17, a detail of which can be seen in FIG. 5a.
  • the roll stands 15 and 16 are each on a scaffold changing car 18 and 19 arranged along rails 20 and 21 can be pushed out of the working position, the standing position Roll stands 22, 23, which are also arranged on stand changing carriages 24 and 25, in Working position can be moved.
  • Both roll stands 15, 16 have electric motors 26, 27, the speed of which is precise is adjustable, the gear ratio 28, 29 reducing the gear ratio to a lower one Number of revolutions takes place and in subsequent transmissions 30 and 31 essentially the Forwarding of the rotary movement from one axis to two axes of the duo mill stand 15 or a pair of rollers of the four-disc mill stand 16.
  • the control of the drive must take into account the decrease in cross section take place that not the same speed of the rolling stock 1, but the same Mass flow rate in the mill stands 15, 16 occurs to any disruption to avoid during the rolling process.
  • the Four-disc mill stand 16 has a slightly higher rolling speed than this would be required for the mass throughput of the duo mill stand 15, which means on the rolling stock between the duo mill stand 15 and the four-disk mill stand 16 a slight one Train is exercised, which, as is known, can be avoided more easily.
  • the transmission of force between the transmissions 28 and 30 or 29 and 31 takes place via waves 32 and 34 or 33 and 35, which are interposed over flanges and one not shown Hardy disc are flanged together.
  • the transmission of power from gearboxes 30 and 31 takes place via shafts 36, 37 and 38, 39 and via universal joints 40, 41, 42 and 43 directly into the Shafts of the roll stands 15 and 16.
  • Fig. 3 that. Four-disc rolling stand 16 is shown schematically in section, the Force is introduced into the shafts 44 and 45 via flanges 46 and 47.
  • the waves are in Roller bearings 48, 49 and 50, 51 of frame stands 62, 63, in which the others Disc rollers 9 and 10 are also stored in this way.
  • the disc rollers 9 and 10 are not driven, but on axes 52 and 53 arranged transversely, this transverse displacement by spacers 54 and 55 performed and then achieved a positional fixation of the disc rollers 9 and 10 can be.
  • the disc rollers 9, 10 are also mounted on roller bearings 56, 57.
  • the disc rollers 7, 8, 9, 10 are over their conical surfaces 7a, 7b, 8a, 8b, 9a, 9b, 10a and 10b held in mutual contact, the relative position of the disc rollers 7 and 8 is given to each other by the rigid arrangement in the rigid roll stand, whereas the disk rollers 9 and 10, as can be seen particularly clearly from FIG. 4, via Tie rods 58, 59 and hydraulic nuts 60 and 61 are held together.
  • Tie rods 58, 59 and hydraulic nuts 60 and 61 are held together.
  • There are Four tie rods 58, 59 are provided, etc. two before and two after that area, in which is the closed caliber 6 through the four disc rollers 7 to 10, so that a Clamping takes place symmetrically on the actual area of the deformation.
  • Shoots, not shown, are height and side adjustable and have one in the rolling direction oriented guideway for the rolling stock 1, which one behind the other and each paired arranged profile rollers 64 is realized, which is a caliber 65 corresponding to the Include the cross section of the rolling stock 1 to be guided.
  • the leadership facility could also be formed by guide surfaces, so that an exact guidance of the duo rolling mill 15 emerging steel bars 1 is possible, and the steel bars 1 in exactly is reproducibly introduced into the four-disc rolling mill 16.
  • Fig. 5a illustrates an embodiment of profile rolls for an octagonal cross section of the Rolled goods 1.
  • a rolling stock guide 17 enables the two Roll stands 15 and 16 move further apart without the precision of the rolling is affected by the rolling stand 16.
  • a distance 66 between the roll stands 15 and 16 of 1.5 to 2 m be realized, whereas without such a guide, the roll stands 15 and 16 very closely should be adjacent, e.g. in the range of half a meter or less.
  • the second roll stand 16 is thus also easily accessible, which makes it easier to operate and maintenance simplified considerably.
  • possible material jams between the two rolling stands can be removed in a simple manner.
  • the rolling stock 1 between the two roll stands 15 and 16 has a polygonal cross-section, because this is the only way to ensure precise guidance of the rolling stock 1 between these two roll stands 15 and 16 possible.
  • the rolling stock 1 a round, for example a circular cross-section in this area would be one exact guidance of the rolling stock is not possible. Tilting of the rolling stock would become negative impact, etc. not only on the guidance of the rolling stock, for example when threading in the further roll stand 16.
  • the caliber sequence is according to a further embodiment of the Invention shown, wherein in a first duo roll stand 15 '(Fig. 6a) with caliber rolls 3', 4 'a rolling stock 1 with a slightly oval cross section (unshaded area) to one Rolled stock with an essentially tetragonal cross-section (hatched area in FIG. 6a) is rolled.
  • This first duo roll stand 15 ' is arranged horizontally.
  • the rolling stock 1 between the first duo roll stand 3 ', 4 'and the subsequent duo roll stand 3, 4 likewise by means of a rolling stock guide 17, preferably a guide track with guide rollers 64 is guided.
  • the rolling stock is rolled in one Four-disc rolling stand 16 (Fig. 6c) with the caliber rolls 7, 8, 9, 10 to form a rolling stock with a circular cross section of the highest precision.
  • a rolling stock guide 17 preferably also formed by guide rollers 64, provided.
  • the steel bar 1 emerging from the second duo mill stand 15 passes over the guide 17 in the four-disc stand 16, in which a circular cross section generated and a further reduction of the cross section by 19% is carried out.
  • the Rollers 3 and 4 of the duo roll stand 15 and the four-disk roll stand 16 have a diameter of 320 cm.
  • the speed of the from the four-disc mill stand 16 emerging steel bars 1 is 15 m / sec.
  • the tie rods 58, 59 and hydraulic nuts 60, 61 are used in the four-disc mill stand 16 exerted a tension of 20 tons.
  • Roll stands 15 and 16 serve pairs of guide rollers 64.
  • finished products with circular Create a cross-section with very high precision, etc. both in terms of measure and Shape e.g. Finished products in the diameter range up to 25 mm with a minimum tolerance of ⁇ 0.1 mm, and in the diameter range from 25 to 100 mm with a minimum tolerance of ⁇ 0.25% of the diameter.
  • the inventive method and the inventive device also enable a simplified rolling operation, insofar as for different diameters of the End product the roughing mill upstream of the profile rolling device according to the invention no change in caliber required; a change in caliber is only for the invention Profile rolling device required, which by the in the invention Profile roller device given the possibility of large variation in the stitch decrease in Diameter range of at least 1: 4 is given. So it is possible starting from one and the same rolling stock supplied to the profile rolling device according to the invention Finished product of e.g. 25 to 100 mm.
  • a finished product with any diameter can be produced according to the invention become, i.e. the diameter of the end product can be selected continuously; one is not bound to jumps in diameter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (14)

  1. Procédé de laminage de précision pour la fabrication d'un produit laminé (1) en forme de barre ou en forme de fil de section transversale ronde, en respectant des tolérances étroites de forme et de dimensions, qui présente les caractéristiques suivantes:
    laminage du produit laminé (1) dans au moins une cage de laminoir duo (15, 15') à cannelure ouverte (5), à partir d'une section transversale quelconque en un produit laminé (1) avec une section transversale polygonale, en particulier quadrangulaire,
    guidage du produit laminé (1) sur un trajet déterminé le long d'une ou de plusieurs arêtes longitudinales et/ou le long des faces du produit laminé (1) se raccordant par des arêtes longitudinales vers une cage de laminoir supplémentaire (16), et
    ensuite laminage en un produit laminé (1) de section transversale ronde dans au moins une cannelure fermée (6), au cours duquel des efforts de laminage agissent en étoile depuis au moins trois directions sur le produit laminé (1) et déforment le produit laminé (1).
  2. Procédé de laminage de précision suivant la revendication 1, caractérisé en ce que le produit laminé (1) est laminé en un produit laminé (1) de section transversale quadrangulaire dans deux cages de laminoir duo disposées l'une derrière l'autre (15', 15) et est guidé entre ces deux cages de laminoir duo (15', 15).
  3. Dispositif de profilage pour la fabrication d'un produit laminé de section transversale ronde, qui présente les caractéristiques suivantes:
    au moins une cage de laminoir duo (15, 15') avec une cannelure de laminage (5) ouverte polygonale, en particulier quadrangulaire,
    un guidage de produit laminé (17) situé à la suite de la cage de laminoir duo (15) dans le sens du laminage (c), avec des dispositifs de guidage (64) guidant le produit laminé (1) sortant de la cage de laminoir duo (15) sur une ou plusieurs arêtes longitudinales et/ou sur les faces du produit laminé se raccordant par des arêtes longitudinales, et
    au moins une cage de laminoir supplémentaire (16) avec une cannelure ronde fermée (6), avec au moins trois cylindres (7 à 10) disposés en étoile.
  4. Dispositif de profilage suivant la revendication 3, caractérisé en ce qu'il est prévu deux cages de laminoir duo (15', 15) avec une cannelure de laminage quadrangulaire, avec un guidage disposé entre elles.
  5. Dispositif de profilage suivant la revendication 3 ou 4, caractérisé en ce que les cylindres (7 à 10) de la cage de laminoir supplémentaire (16) sont appuyés les uns sur les autres par des surfaces coniques (7a à 10b), les cylindres (7 à 10) étant pressés les uns contre les autres avec un effort de serrage qui dépasse l'effort de laminage d'un effort de préserrage.
  6. Dispositif de profilage suivant une ou plusieurs des revendications 3 à 5, caractérisé en ce que la cannelure fermée (6) présente une aire de section transversale, qui est inférieure de 5 à 20% à celle de la cannelure ouverte (5) de la cage de laminoir duo (15).
  7. Dispositif de profilage suivant une ou plusieurs des revendications 3 à 6, caractérisé en ce que la cage de laminoir supplémentaire (16) présente quatre cylindres (7 à 10), en particulier des cylindres à disques, dont seulement deux cylindres (7, 8) disposés l'un en face de l'autre peuvent être entraínés au moyen d'un moteur, en particulier avec un moteur commun, et en ce que chacun des quatre cylindres (7 à 10) s'appuie chaque fois par une surface conique (7a à 10b) sur une surface conique d'un autre cylindre (7 à 10), chaque cylindre (7 à 10) s'appuyant sur deux cylindres voisins (7 à 10) et les surfaces coniques (7a à 10b) des cylindres (7 à 10) établissant un flux fermé d'efforts ainsi qu'un entraínement par friction pour les cylindres (9, 10) non entraínés par un moteur.
  8. Dispositif de profilage suivant la revendication 7, caractérisé en ce que les cylindres entraínés (7, 8) de la cage de laminoir supplémentaire (16) présentent dans les surfaces de formage (11, 12) un diamètre plus grand que les cylindres (9, 10) non entraínés par un entraínement propre.
  9. Dispositif de profilage suivant la revendication 7 ou 8, caractérisé en ce que les cylindres (7, 8) de la cage de laminoir supplémentaire (16) pouvant être entraínés par un moteur peuvent être déplacés dans la direction de leur arbre vers les deux autres cylindres (9, 10).
  10. Dispositif de profilage suivant une ou plusieurs des revendications 7 à 9, caractérisé en ce que la cage de laminoir supplémentaire (16) présente deux montants de cage (62, 63), qui sont précontraints l'un par rapport à l'autre au moyen de tirants (58, 59) et d'écrous filetés (60, 61).
  11. Dispositif de profilage suivant la revendication 10, caractérisé en ce que les écrous filetés (60, 61) sont constitués par des écrous hydrauliques.
  12. Dispositif de profilage suivant une ou plusieurs des revendications 3 à 11, caractérisé en ce que la cage de laminoir duo (15) et/ou la cage de laminoir supplémentaire (16) est chaque fois disposée sur un chariot de changement de cage (19), qui peut être déplacé le long de rails dans une position de travail et y être fixé et qui peut être à nouveau déplacé de cette position à une position de repos.
  13. Dispositif de profilage suivant une ou plusieurs des revendications 3 à 12, caractérisé en ce que les surfaces de formage (11 à 14) des cylindres (7 à 10) formant la cannelure fermée (6) présentent un retrait aux arêtes de forme circulaire qui se raccordent l'une à l'autre (Fig. 1d).
  14. Dispositif de profilage suivant une ou plusieurs des revendications 3 à 13, caractérisé en ce que les dispositifs de guidage (64) sont formés par des rouleaux profilés.
EP98949818A 1997-11-14 1998-10-21 Procede de laminage de precision Expired - Lifetime EP1030746B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT193297 1997-11-14
AT0193297A AT406644B (de) 1997-11-14 1997-11-14 Präzisionswalzverfahren
PCT/AT1998/000255 WO1999025499A1 (fr) 1997-11-14 1998-10-21 Procede de laminage de precision

Publications (2)

Publication Number Publication Date
EP1030746A1 EP1030746A1 (fr) 2000-08-30
EP1030746B1 true EP1030746B1 (fr) 2002-05-08

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EP98949818A Expired - Lifetime EP1030746B1 (fr) 1997-11-14 1998-10-21 Procede de laminage de precision

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EP (1) EP1030746B1 (fr)
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AT (1) AT406644B (fr)
DE (1) DE59804086D1 (fr)
WO (1) WO1999025499A1 (fr)

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FR2938110B1 (fr) * 2008-11-06 2013-02-15 Areva Nc Procede de vidage de gaines de combustible nucleaire et machine de broyage par deformation de la gaine
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CN102910410A (zh) * 2012-11-02 2013-02-06 无锡华联科技集团有限公司 管子单辊夹送机构
CN103084416A (zh) * 2013-01-31 2013-05-08 中冶南方工程技术有限公司 一种水平式纠偏夹送装置
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CN102671937B (zh) * 2012-05-07 2014-11-12 陈吉玉 主动式精密四辊轧机

Also Published As

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JP2001523575A (ja) 2001-11-27
DE59804086D1 (de) 2002-06-13
US6216517B1 (en) 2001-04-17
WO1999025499A1 (fr) 1999-05-27
EP1030746A1 (fr) 2000-08-30
ATA193297A (de) 1999-12-15
JP4316796B2 (ja) 2009-08-19
AT406644B (de) 2000-07-25

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