EP1030746B1 - Precision-rolling method - Google Patents

Precision-rolling method Download PDF

Info

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
Authority
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
Other languages
German (de)
French (fr)
Other versions
EP1030746A1 (en
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP1030746A1 publication Critical patent/EP1030746A1/en
Application granted granted Critical
Publication of EP1030746B1 publication Critical patent/EP1030746B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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.

Landscapes

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

Description

Die Erfindung betrifft ein Präzisionswalzverfahren zum Herstellen von stabförmigem oder drahtförmigem Walzgut mit kreisrundem Querschnitt, unter Einhaltung enger Form- und Maßtoleranzen sowie eine Profilwalzeinrichtung zur Durchführung des Verfahrens.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.

Es sind zur Zeit mehrere Systeme für das Präzisionswalzen ("Sizing") von stabförmigem Walzgut bekannt. Die bekannten Systeme werden nach kontinuierlichen Stabstahlwalzstraßen bzw. vor oder nach Drahtwalzblöcken eingesetzt, um die Form- und Maßhaltigkeit des Walzgutes zu verbessem.There are currently several systems for the precision rolling ("sizing") of rod-shaped Rolling stock known. The known systems are based on continuous steel mill trains or before or after wire rod blocks used to the dimensional and dimensional accuracy of the To improve rolling stock.

Ein bekanntes System besteht aus drei Duo-Walzgerüsten in der Abfolge horizontal-vertikalhorizontal. Das aus der kontinuierlichen Walzstraße auslaufende Rund wird in diesem System mit der Kaliberfolge oval-oval-rund mit geringem Umformgrad auf die gewünschte Fertigdimension umgeformt.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.

Die Nachteile dieses Systems sind folgende: Die ovalen Querschnitte lassen sich mit bekannten Walzgutführungen nur schwer führen. Das Walzgut neigt zum Kippen, d.h. zur Querschnittsverdrehung, insbesondere wenn der Abstand zwischen den Gerüsten zu groß ist. Daher wird auf eine Führung des Walzgutes zwischen den Gerüsten verzichtet und der Gerüstabstand so klein wie möglich gewählt. Daraus ergibt sich der weitere Nachteil, daß im Falle einer Störung des Walzgutdurchlaufs das aufgestaute Walzgut nur schwierig entfernt werden kann. Auch ist die Wartung der Gerüste kompliziert und umständlich. Ein dritter Nachteil ist die sehr komplizierte maßliche Einstellung der Walzkaliber auf die Fertigabmessung wegen der notwendigen Berücksichtigung der Lagerspiele und dei thermischen Ausdehnung der Gerüste während des Betriebs.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. This results in the further disadvantage that in In the event of a malfunction in the rolling stock flow, the accumulated rolling stock is difficult to remove can be. 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.

Ein weiteres System besteht aus zwei Duo-Gerüsten in der Abfolge vertikal-horizontal, wobei das zweite Gerüst vorgespannte Walzen aufweist. Auch hier wird das aus der kontinuierlichen Walzstraße auslaufende Rund mit der Kaliberfolge oval-rund auf das gewünschte Fertigmaß umgeformt. Durch die vorgespannten Walzen des Fertiggerüstes werden die Lagerspiele und die thermische Gerüstdehnung kompensiert. Hier ist ebenfalls der entscheidende Nachteil der schwierigen Führung des ovalen Querschnitts in das Rundkaliber gegeben.Another system consists of two duo stands in the sequence vertical-horizontal, whereby the second stand has biased rollers. Here, too, the continuous Round mill tapering round with the oval-round caliber sequence to the desired finished size reshaped. Through the pre-tensioned rollers of the finishing stand, the bearing clearances and compensates for the thermal expansion of the scaffold. Here too is the crucial disadvantage of difficult guidance of the oval cross-section into the round caliber.

Ein drittes System besteht aus einem Walzblock mit drei Walzgerüsten, in denen jeweils drei Walzen unter 120° zueinander angeordnet sind. Das aus der kontinuierlichen Walzstraße auslaufende Rund wird mit der Kaliberfolge trigon-trigon-rund auf das gewünschte Fertigmaß umgeformt. Die Nachteile liegen einerseits in dem hohen mechanischen Aufwand für Antrieb und Synchronisation der drei Walzen pro Gerüst, andererseits in dem Umstand, daß für keine Kompensation der Lagerspiele und thermischen Ausdehnungen der Gerüste gesorgt ist.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.

Das vierte bekannte System besteht aus zwei Walzgerüsten mit jeweils vier Walzen, von denen jeweils nur ein Walzenpaar angetrieben ist und das andere durch das Walzgut mitgeschleppt wird. Die Walzenachsen des zweiten Walzgerüstes sind um 45° gegenüber dem ersten verdreht angeordnet. Auch dieses System besitzt den Nachteil der schwierigen Voreinstellung der Walzkaliber, da die Lagerspiele und thermischen Ausdehnungen berücksichtigt werden müssen. Weitere Nachteile ergeben sich aus der um 45° verdrehten Antriebslage des zweiten Gerüstes, die einen komplizierten mechanischen Antrieb erfordert. Ein weiterer Nachteil ist, daß die nichtangetriebenen Walzenpaare vom einlaufenden Walzgutanfang auf ihre Arbeitsdrehzahl beschleunigt werden müssen, woraus eine Beschädigung des Kalibergrundes resultieren kann.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.

Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, ein Präzisionswalzverfahren zum Herstellen von stabförmigem Walzgut oder Draht mit kreisrundem Querschnitt zu schaffen, welche ein Walzgut mit besonders hoher Genauigkeit in einer bestimmten Dimension ergeben, wobei jedoch trotzdem - im Gegensatz zum Stand der Technik - eine gute Zugänglichkeit zu jedem der Walzgerüste gegeben ist, so daß auch im Falle einer Störung das Walzen innerhalb kurzer Zeit wieder fortgesetzt werden kann, d.h. die Betriebsbereitschaft der Anlage schnellstmöglich wieder herstellbar und eine einfache Wartung möglich sind.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.

Diese Aufgabe wird bei einem Verfahren der eingangs beschriebenen Art durch die Kombination folgender Merkmale gelöst:

  • Walzen des Walzgutes in mindestens einem Duo-Walzgerüst mit offenem Kaliber, ausgehend von einem beliebigen Querschnitt zu einem Walzgut mit polygonalem, inbesondere tetragonalem Querschnitt,
  • Führen des Walzgutes über eine vorbestimmte Weglänge entlang einer oder mehrerer Längskanten und/oder entlang der an Längskanten anschließenden Flächen des Walzgutes zu einem weiteren Walzgerüst und
  • anschließendes Walzen zu einem Walzgut mit kreisrundem Querschnitt in mindestens einem geschlossenen Kaliber, bei dem Walzkräfte stemförmig auf das Walzgut aus zumindest drei Richtungen einwirken und das Walzgut verformen.
In a method of the type described in the introduction, this object is achieved by combining the following features:
  • Rolling the rolling stock in at least one duo rolling stand with an open caliber, starting from any cross-section to a rolling stock with a polygonal, in particular tetragonal cross-section,
  • Guide the rolling stock over a predetermined path length along one or more longitudinal edges and / or along the surfaces of the rolling stock adjoining the longitudinal edges to a further rolling stand and
  • subsequent rolling into a rolling stock with a circular cross section in at least one closed caliber, in which rolling forces act like a stem on the rolling stock from at least three directions and deform the rolling stock.

Durch die Führung des Stabstahles zur Einleitung desselben in das weitere Walzgerüst, die durch den polygonalen Querschnitt des aus dem Duo-Walzgerüst austretenden Stabstahles ermöglicht wird, ist entlang der gesamten Länge des Stabstahles eine exakte gleichbleibende Zuführung desselben in das weitere Walzgerüst gewährleistet, so daß sowohl eine gleichmäßige Verformung des Stabstahles als auch dadurch bedingt ein gleichmäßiger Querschnitt erreicht werden kann, wobei aufgrund der gleichmäßigen Verformung auch nach Austritt des Stabstahles aus dem Walzgerüst kein Kippen od. dgl. stattfindet.By guiding the bar steel to introduce it into the further rolling stand, the due to the polygonal cross section of the steel bar emerging from the duo mill stand is made possible is an exact constant along the entire length of the bar steel Feeding the same into the further rolling stand ensures that both a uniform deformation of the steel bar and, as a result, a uniform one Cross section can be achieved, due to the uniform deformation also after If the steel bar exits the roll stand, no tilting or the like takes place.

Vorzugsweise wird das Walzgut in zwei hintereinander angeordneten Duo-Walzgerüsten zu einem Walzgut mit tetragonalem Querschnitt gewalzt und zwischen diesen beiden Duo-Walzgerüsten geführt.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.

Eine Profilwalzeinrichtung zur Durchführung des erfindungsgemäßen Verfahrens ist gekennzeichnet durch:

  • mindestens ein Duo-Walzgerüst mit einem offenen, polygonalen, insbesondere tetragonalen Walzkaliber,
  • eine an das Duo-Walzgerüst in Walzrichtung anschließende Walzgutführung mit das aus dem Duo-Walzgerüst austretende Walzgut an einer oder mehreren Längskanten und/oder an den an Längskanten des Walzgutes anschließenden Flächen des Walzgutes führenden Führungseinrichtungen und
  • mindestens ein weiteres Walzgerüst mit einem geschlossenen kreisrunden Kaliber mit mindestens drei sternförmig angeordneten Walzen.
A profile rolling device for carrying out the method according to the invention is characterized by:
  • at least one duo mill stand with an open, polygonal, in particular tetragonal, roll caliber,
  • a rolling stock guide connected to the duo rolling stand in the rolling direction with the rolling stock emerging from the duo rolling stand on one or more longitudinal edges and / or on the surfaces of the rolling stock leading to the longitudinal edges of the rolling stock and
  • at least one further roll stand with a closed circular caliber with at least three rollers arranged in a star shape.

Ein Walzgerüst mit einem geschlossenen Kaliber ist beispielsweise aus der DE-A- 1 527 722 bekannt. Es weist vier Scheiben auf, deren Arbeitsflächen ein geschlossenes Kaliber bilden. Zwei gegenüberliegende Scheibenwalzen sind angetrieben, wohingegen die beiden anderen Scheibenwalzen über das zu walzende Material bewegt werden. Die Scheibenwalzen können gegeneinander verstellt werden, so daß das Kaliber in seiner Dimensionierung variabel ist. Jede Scheibenwalze wird von einer anderen Scheibenwalze beaufschlagt, wobei eine Verschiebung der Scheibenwalzen in radialer Richtung der anderen Scheibenwalzen diese Veränderung des Kalibers ermöglicht. Dadurch wird jedoch bedingt, daß die Scheibenwalzen nur mit relativ geringen Kräften gegeneinander gehalten sein können, da keine Gegenkräfte zur Vermeidung einer Verbiegung der Scheibenwalzen aufgebracht werden können. Ein derartiges geschlossenes Kaliber ist bereits ohne die zusätzliche Krafteinwirkung, welche durch das Walzen bewirkt wird, nur schwer geeignet, dauerhaft ein geschlossenes Kaliber zu bilden, sondem es tritt vielmehr eine unerwünschte Dimensionsänderung des Kalibers ein, so daß nicht die erwünschte Dimensionierung eines Walzgutes erreicht werden kann. 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.

Eine besonders vorteilhafte erfindungsgemäße Ausführungsform ist dadurch gekennzeichnet, daß zwei Duo-Walzgerüste mit tetragonalem Walzkaliber mit einer zwischengeordneten Führung vorgesehen sind.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.

Gemäß einer bevorzugten Ausführungsform sind erfindungsgemäß zur einfachen Verwirklichung eines auch unter erschwerten Walzbedingungen stets geschlossenen Kalibers die Walzen des weiteren Walzgerüstes über konische Flächen aneinander abgestützt, wobei die Walzen mit einer die Walzkraft um eine Vorspannkraft überschreitenden Anstellkraft gegeneinandergepreßt sind.According to a preferred embodiment, 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.

Ein Walzgerüst mit einem geschlossenen Kaliber der oben beschriebenen Art ist an sich bekannt, beispielsweise aus der EP-A- 0 264 849.A roll stand with a closed caliber of the type described above is in itself known, for example from EP-A-0 264 849.

Vorzugsweise weist erfindungsgemäß das geschlossene Kaliber eine Querschnittsfläche auf, die um 5 bis 20 % geringer ist als jene des offenen Kalibers des Duo-Walzgerüstes. Hierdurch können selbst Stahllegierungen mit hohem Verformungswiderstand besonders genau gewalzt werden, wobei aufgrund der sich dabei ergebenden geringen Walzkräfte auch hohe Walzgeschwindigkeiten verwirklicht werden können.According to the invention, 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.

Eine bevorzugte Ausführungsform ist dadurch gekennzeichnet, daß das weitere Walzgerüst vier Walzen, insbesondere Scheibenwalzen, aufweist, von denen lediglich zwei einander gegenüberliegende Walzen mittels eines Motors antreibbar sind, insbesondere mit einem gemeinsamen Motor, und daß jede der vier Walzen über jeweils eine konische Fläche an einer konischen Fläche einer weiteren Walze anliegt, wobei jede Walze an zwei benachbarten Walzen anliegt und sich über die konischen Kontaktflächen der Walzen ein geschlossener Kraftfluß sowie ein Reibantrieb für die nicht von einem Motor angetriebenen Walzen einstellt.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.

Hierdurch ist ein besonders vorteilhafter Kraftschluß innerhalb des Kalibers gegeben, wobei durch Aufteilung des Antriebes einerseits als Zwangsantrieb über einen Motor, andererseits über die konischen Flächen eine Synchronisation der Walzen mit einfachsten Mitteln erreicht ist. Durch die Scheibenwalzen ist sichergestellt, daß die Beanspruchung der formenden Flächen der Walzen aufgrund des höheren Umfanges geringer gehalten werden kann.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.

Vorteilhaft weisen die angetriebenen Walzen des weiteren Walzgerüstes einen größeren Durchmesser in den formenden Flächen auf als die nicht über einen eigenen Antrieb angetriebenen Walzen, wodurch die Stabstähle besonders einfach in das weitere Walzgerüst eingeleitet werden können, so daß insbesondere auch im Kopfbereich des Stabstahles besonders schnell der erwünschte Querschnitt erhalten wird.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.

Gemäß einer weiteren bevorzugten Ausführungsform sind die über einen Motor antreibbaren Walzen des weiteren Walzgerüstes in Richtung ihrer Welle gegen die zwei weiteren Walzen verschiebbar, wodurch eine exakte Positionierung des weiteren Walzgerüstes bezüglich des ersten als auch der Führung erreicht wird, so daß die Achse des Walzgutes in der Walzstraße vollkommen geradlinig beibehalten werden kann.According to a further preferred embodiment, 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.

Vorteilhaft weist das weitere Walzgerüst zwei Gerüstständer auf, welche gegeneinander über Zuganker und Gewindemuttern vorgespannt sind. Hierdurch können besonders hohe Kräfte aufgebracht werden, so daß mit besonders hoher Genauigkeit eine Reduktion der Querschnittsfläche des Walzgutes erreicht werden kann und gleichzeitig hohe Geschwindigkeiten realisiert werden können. Durch die konstruktive Ausbildung mit Zuganker und Gewindemutter ist eine besonders einfache Ausbildung der Gerüstständer realisierbar, die gleichzeitig besonders zuverlässig ist.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. Through 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.

Sind die Gewindemuttern Hydraulikmuttern, so kann die Montage derselben besonders einfach, u.zw. ohne zusätzliches Werkzeug erfolgen.If the threaded nuts are hydraulic nuts, the assembly of the same can be special easy, etc. done without additional tools.

Ist das Duo-Walzgerüst und/oder das weitere Walzgerüst jeweils auf einem Gerüstwechselwagen angeordnet, welcher entlang von Schienen in eine Arbeitsstellung schieb- und dort festlegbar und aus dieser Stellung erneut in eine Ruhestellung schiebbar ist, so kann ein besonders einfacher Austausch der Walzen erfolgen, wobei gleiclizeitig eine exakte Positionierung des Walzgerüstes besonders einfach durchgeführt werden kann.Is the duo mill stand and / or the other mill stand on one Scaffold changing car arranged, which along rails in a working position can be pushed and fixed there and pushed again from this position into a rest position, a particularly simple exchange of the rollers can take place, one at the same time exact positioning of the roll stand can be carried out particularly easily.

Zweckmäßig weisen die formenden Flächen der das geschlossene Kaliber bildenden Walzen an den aneinanderschließenden kreisförmigen Kanten eine Abfasung auf. Hierdurch ist selbst bei Unregelmäßigkeiten der Querschnittsfläche des Walzgutes aus dem Duo-Walzgerüst bzw. nicht angeglichenen Geschwindigkeiten zwischen dem Duo-Walzgerüst und dem weiteren Walzgerüst eine genaue Querschnittsfläche des Walzgutes gewährleistet, wobei die Beanspruchung der formenden Flächen des weiteren Gerüstes besonders gering gehalten ist.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.

Eine besonders einfache Gestaltung der Führungseinrichtungen ist durch Profilrollen gekennzeichnet. Diese sind zweckmäßig paarweise unter Bildung eines der Querschnittsform des zu führenden Walzgutes angepaßten Kalibers angeordnet. Weiters sind die Profilrollen in je nach Weglänge erforderlicher Anzahl unter Bildung einer Rollenbahn vorgesehen. 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.

Die Erfindung ist nachstehend anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert, wobei in den Fig. 1a bis 1d eine Kaliberfolge für das erfindungsgemäße Walzverfahren bzw. die Einrichtung zur Durchführung des Verfahrens veranschaulicht ist. Fig. 2 zeigt in schematischer Darstellung zwei hintereinander angeordnete Walzgerüste der erfindungsgemäßen Profilwalzeinrichtung. Fig. 3 veranschaulicht einen Schnitt durch das Walzgerüst gemäß der Linie III/III der Fig. 2; Fig. 4 zeigt einen Schnitt durch das Walzgerüst gemäß der Linie IV/IV der Fig. 2, und die Fig. 5a und 5b veranschaulichen jeweils ein Ausführungsbeispiel für eine Führungseinrichtung zwischen den Walzgerüsten. In den Fig. 6a bis 6c ist die Kaliberfolge gemäß einer weiteren Ausführungsform gezeigt.The invention is illustrated below with reference to two in the drawing Exemplary embodiments explained in more detail, with a caliber sequence for the Rolling method according to the invention or the device for carrying out the method is illustrated. 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.

Das zu verformende Walzgut 1, ein Stabstahl, wird, ausgehend von dem in Fig. 1a dargestellten runden Querschnitt (in Fig. 1b strichpunktiert dargestellt) zu einem im wesentlichen vierkantigen Querschnitt mittels der in Fig. 1b dargestellten Walzen 3, 4 mit Nuten 3a, 4a eines Duo-Walzgerüstes mit offenem Kaliber 5 unter Reduktion der Querschnittsfläche umgeformt. Dieser nunmehr vierkantige Stabstahl, wobei derselbe auch einen anderen polygonalen Querschnitt aufweisen kann, wie z.B. einen dreikantigen, fünfkantigen od. dgl., gelangt in das in Fig. 1c dargestellte geschlossene Kaliber 6 mit vier Scheibenwalzen 7, 8 und 9, 10, in dem er wieder zu einem Stabstahl mit rundem Querschnitt, jedoch hoher Präzision, gewalzt wird.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.

Die Scheibenwalzen 7 bis 10 weisen an den den Kaliberteilflächen 11, 12 und 13, 14 anschließenden Bereichen konische Flächen, u.zw. 7a, 7b, 8a, 8b, 9a, 9b und 10a, 10b auf. Diese Flächen schließen jeweils Öffnungswinkel α von 90° ein, so daß die einzelnen Scheibenwalzen 7 bis 10 bei gleich großen Kegelstumpfflächen unter geringstem Schlupf gegeneinander gepreßt werden können, womit einerseits ein geschlossenes Kaliber gebildet ist und andererseits der Antrieb von einem Scheibenwalzenpaar auf das weitere Scheibenwalzenpaar mit hohen Kräften durchgeführt werden kann. Wie in Fig. 1d dargestellt, können die Kanten zwischen den Kegelstumpfflächen 7a, 7b und der Kaliberteilfläche 11 abgefast sein, so daß ein Kaliber entsteht, das weiterhin geschlossen ist, jedoch die Möglichkeit aufweist, Flächenpressungsspitzen zu vermeiden.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 α 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.

Das geschlossene Kaliber, welches in Fig. 1c dargestellt ist, kann auch jede andere Form, beispielsweise Vierkant oder einen anderen polygonen Querschnitt, oval od. dgl. aufweisen.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.

Bei der Aufeinanderfolge der Kaliber 5 und 6 ist im Sinne einer gleichmäßigen Verformung darauf zu achten, daß bei den aufeinanderfolgenden Walzstichen nicht immer in denselben oder analogen Richtungen verformt wird, sondern die Verformung beispielsweise normal zur ersten Verformungsrichtung stattfindet, so daß, bezogen auf den gesamten Querschnitt, im wesentlichen gleichmäßige Verformungen vorhanden sind.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.

In Fig. 2 sind in Walzrichtung c zwei Walzgerüste 15, 16 hintereinander angeordnet dargestellt, u.zw. ein Duo-Walzgerüst 15 mit dem offenen Kaliber 5 und ein Vierscheiben-Walzgerüst 16 mit dem geschlossenen Kaliber 6. Zum besseren Verständnis sind sowohl das Duo-Walzgerüst 15 als auch das Vierscheiben-Walzgerüst 16 im Aufriß dargestellt. Zwischen den Walzgerüsten ist in schematischer Darstellung eine Walzgutführung 17 veranschaulicht, von der ein Detail der Fig. 5a zu entnehmen ist. Die Walzgerüste 15 und 16 sind jeweils auf einem Gerüstwechselwagen 18 und 19 angeordnet, welcher entlang von Schienen 20 und 21 aus der Arbeitsstellung geschoben werden kann, wobei die in Ruheposition stehenden Walzgerüste 22, 23, welche ebenfalls auf Gerüstwechselwagen 24 und 25 angeordnet sind, in Arbeitsposition verschoben werden können. Es ist hierbei lediglich erforderlich, daß parallel zur Walzrichtung c ebenfalls Schienen vorgesehen sind, so daß am Kreuzungspunkt der normal und parallel zur Walzrichtung c verlaufenden Schienen die Wägen 18, 19 gedreht und damit aus der Position Walzstellung bewegt werden können, und das weitere Walzgerüst sodann wieder in Arbeitsposition gebracht werden kann. Ein derartiger Vorgang ist erforderlich, wenn entweder ein Wechsel im Querschnitt des Stabstahles 1 durchgeführt werden soll oder auch die Walzen 3, 4 und 7 bis 10 abgenutzt sind und ein Austausch erforderlich wird.2, 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. It is only necessary that parallel rails are also provided for rolling direction c, so that at the crossing point the carriages 18, 19 rotated normally and parallel to the rolling direction c and so that the rolling position can be moved, and the further rolling stand can then be brought back into the working position. Such a process is required if either a change in the cross section of the steel bar 1 is carried out should be or the rollers 3, 4 and 7 to 10 are worn and an exchange is required.

Beide Walzgerüste 15, 16 weisen Elektromotoren 26, 27 auf, deren Drehzahl genau regulierbar ist, wobei über Getriebe 28, 29 die Untersetzung in eine geringere Umdrehungszahl erfolgt und in anschließenden Getrieben 30 und 31 im wesentlichen die Weiterleitung der Drehbewegung von einer Achse auf zwei Achsen des Duo-Walzgerüstes 15 bzw. eines Walzenpaares des Vierscheiben-Walzgerüstes 16 erfolgt.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.

Die Regelung des Antriebes muß unter Berücksichtigung der Querschnittsabnahme derart erfolgen, daß keine gleiche Geschwindigkeit des Walzgutes 1, sondern eine gleiche Massendurchsatzgeschwindigkeit in den Walzgerüsten 15, 16 eintritt, um jegliche Störungen bei dem Walzvorgang zu vermeiden. Es kann jedoch auch vorteilhaft sein, daß das Vierscheiben-Walzgerüst 16 eine geringfügig größere Walzgeschwindigkeit aufweist, als dies für den Massendurchsatz des Duo-Walzgerüstes 15 erforderlich wäre, womit auf das Walzgut zwischen dem Duo-Walzgerüst 15 und dem Vierscheiben-Walzgerüst 16 ein geringfügiger Zug ausgeübt wird, wodurch, wie bekannt, Störungen leichter vermieden werden können. 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. However, it can also be advantageous that 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.

Die Kraftweiterleitung zwischen den Getrieben 28 und 30 bzw. 29 und 31 erfolgt über Wellen 32 und 34 bzw. 33 und 35, die über Flansche und einer nicht dargestellten zwischengelegten Hardy-Scheibe aneinandergeflanscht sind. Die Kraftausleitung aus den Getrieben 30 und 31 erfolgt über Wellen 36, 37 und 38, 39 und über Kardangelenke 40, 41, 42 und 43 direkt in die Wellen der Walzgerüste 15 bzw. 16.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.

In Fig. 3 ist das. Vierscheiben-Walzgerüst 16 schematisch im Schnitt dargestellt, wobei die Krafteinleitung in die Wellen 44 und 45 über Flansche 46 und 47 erfolgt. Die Wellen sind in Rollenlagern 48, 49 und 50, 51 von Gerüstständern 62, 63 gelagert, in welchen die weiteren Scheibenwalzen 9 und 10 ebenfalls in dieser Weise gelagert sind.In 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.

Die Scheibenwalzen 9 und 10 sind nicht angetrieben, aber auf Achsen 52 und 53 querverschieblich angeordnet, wobei diese Querverschiebung durch Distanzscheiben 54 und 55 durchgeführt und auch sodann eine Lagefixierung der Scheibenwalzen 9 und 10 erreicht werden kann. Die Scheibenwalzen 9, 10 sind ebenfalls über Rollenlager 56, 57 gelagert.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.

Die Scheibenwalzen 7, 8, 9, 10 werden über ihre konischen Flächen 7a, 7b, 8a, 8b, 9a, 9b, 10a und 10b im gegenseitigen Kontakt gehalten, wobei die Relativlage der Scheibenwalzen 7 und 8 zueinander durch die starre Anordnung im biegesteifen Walzgerüst gegeben ist, wohingegen die Scheibenwalzen 9 und 10, wie besonders deutlich aus Fig. 4 zu entnehmen ist, über Zuganker 58, 59 und hydraulische Muttern 60 und 61 gegeneinandergehalten sind. Es sind jeweils vier Zuganker 58, 59 vorgesehen, u.zw. zwei vor und zwei nach jenem Bereich, in dem das geschlossene Kaliber 6 durch die vier Scheibenwalzen 7 bis 10 vorliegt, so daß ein Zusammenspannen symmetrisch auf den eigentlichen Bereich der Verformung erfolgt.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. 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.

Die in Fig. 5a dargestellte Walzgutführung 17 für Walzgut 1 ist einerseits über geeignete, nicht dargestellte Triebe höhen- und seitenverstellbar und weist eine in Walzrichtung orientierte Führungsbahn für das Walzgut 1 auf, welche durch hintereinander und jeweils paarweise angeordnete Profilrollen 64 verwirklicht ist, die ein Kaliber 65 entsprechend dem Querschnitt des zu führenden Walzgutes 1 einschließen. Die Führungseinrichtung könnte auch durch Führungsflächen gebildet sein, so daß eine exakte Führung des aus dem Duo-Walzwerk 15 austretenden Stabstahles 1 möglich ist, und der Stabstahl 1 in genau reproduzierbarer Weise in das Vierscheiben-Walzwerk 16 eingeführt wird. Fig. 5a veranschaulicht eine Ausführungsform von Profilrollen für einen achteckigen Querschnitt des Walzgutes 1. The rolling stock guide 17 for rolling stock 1 shown in FIG. 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.

Durch die erfindungsgemäße Anordnung einer Walzgutführung 17 gelingt es, die beiden Walzgerüste 15 und 16 weiter auseinanderzurücken, ohne daß die Präzision der Walzung durch das Walzgerüst 16 in Mitleidenschaft gezogen wird. Beispielsweise kann erfindungsgemäß eine Distanz 66 zwischen den Walzgerüsten 15 und 16 von 1,5 bis 2 m verwirklicht werden, wogegen ohne eine solche Führung die Walzgerüste 15 und 16 ganz eng benachbart angeordnet sein müßten, z.B. im Bereich von einem halben Meter oder weniger. Erfindungsgemäß ist somit auch das zweite Walzgerüst 16 gut zugänglich, was die Bedienung und Wartung ganz wesentlich vereinfacht. Zudem können eventuelle Materialstaus zwischen den beiden Walzgerüsten in einfacher Weise entfernt werden.The arrangement of a rolling stock guide 17 according to the invention enables the two Roll stands 15 and 16 move further apart without the precision of the rolling is affected by the rolling stand 16. For example according to the invention 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. According to the invention, the second roll stand 16 is thus also easily accessible, which makes it easier to operate and maintenance simplified considerably. In addition, possible material jams between the two rolling stands can be removed in a simple manner.

Trotz dem relativ großen Abstand 66 der beiden Walzgerüste 15 und 16 zueinander lassen sich auch die Anfangs- und Endbereiche des Walzgutes 1 besonders exakt auf die gewünschte Dimension walzen. Wesentlich ist, daß das Walzgut 1 zwischen den beiden Walzgerüsten 15 und 16 einen polygonartigen Querschnitt aufweist, denn nur hierdurch ist eine exakte Führung des Walzgutes 1 zwischen diesen beiden Walzgerüsten 15 und 16 möglich. Hätte das Walzgut 1 in diesem Bereich einen runden, beispielsweise einen kreisrunden Querschnitt, wäre eine exakte Führung des Walzgutes nicht möglich. Kippungen des Walzgutes würden sich negativ auswirken, u.zw. nicht nur auf die Führung des Walzgutes, beispielsweise beim Einfädeln in das weitere Walzgerüst 16.Despite the relatively large distance 66 of the two roll stands 15 and 16 to each other the start and end areas of the rolling stock 1 particularly precisely to the desired Roll dimension. It is essential that 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. Had 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.

In den Fig. 6a, 6b und 6c ist die Kaliberfolge gemäß einer weiteren Ausführungsform der Erfindung gezeigt, wobei in einem ersten Duo-Walzgerüst 15' (Fig. 6a) mit Kaliberwalzen 3', 4' ein Walzgut 1 mit einem leicht ovalen Querschnitt (unschraffierte Fläche) zu einem Walzgut mit im wesentlichen tetragonalem Querschnitt (schraffierte Fläche in Fig. 6a) gewalzt wird. Dieses erste Duo-Walzgerüst 15' ist horizontal angeordnet. In einem nachfolgenden vertikalen Duo-Walzgerüst 15 (Fig. 6b) mit den Kaliberwalzen 3, 4 erfolgt eine Querschnittsreduzierung zu einem Walzgut 1 mit ebenfalls tetragonalem Querschnitt (schraffierte Fläche in Fig. 6b), wobei das Walzgut 1 zwischen dem ersten Duo-Walzgerüst 3', 4' und dem nachfolgenden Duo-Walzgerüst 3, 4 ebenfalls mittels einer Walzgutführung 17, vorzugsweise einer Führungsbahn mit Führungsrollen 64, geführt ist.6a, 6b and 6c, 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. In one subsequent vertical duo mill stand 15 (Fig. 6b) with the caliber rolls 3, 4 a reduction in cross section to a rolling stock 1 with a tetragonal cross section (hatched area in Fig. 6b), 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.

Anschließend an das zweite Duo-Walzgerüst 15 erfolgt ein Walzen des Walzgutes in einem Vierscheiben-Walzgerüst 16 (Fig. 6c) mit den Kaliberwalzen 7, 8, 9, 10 zu einem Walzgut mit kreisrundem Querschnitt höchster Präzision. Zwischen dem zweiten Duo-Walzgerüst 15 und dem Vierscheiben-Walzgerüst 16 ist eine Walzgutführung 17, vorzugsweise ebenfalls von Führungsröllen 64 gebildet, vorgesehen. Following the second duo roll stand 15, 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. Between the second duo mill stand 15 and the four-disc roll stand 16 is a rolling stock guide 17, preferably also formed by guide rollers 64, provided.

Beispielexample

Stranggußknüppel aus Kohlenstoffstahl, z.B. C10, mit quadratischem Querschnitt von 150 mm Seitenlänge, werden in einer Streckkaliberstraße auf einen runden Querschnitt mit einem Durchmesser von 22 mm gewalzt. Anschließend werden die so gebildeten Stabstähle einem ersten Duo-Walzgerüst 15' zugeführt. In diesem Duo-Walzgerüst 15' erfolgt eine Reduktion des Querschnittes um 28 %. Anschließend erfolgt eine weitere Walzung in einem zweiten Duo-Walzgerüst 15 mit einer Stichabnahme von 22 % zu einem tetragonalen Querschnitt. Der aus dem zweiten Duo-Walzgerüst 15 austretende Stabstahl 1 gelangt über die Führung 17 in das Vierscheiben-Walzgerüst 16, in dem ein kreisrunder Querschnitt erzeugt sowie eine weitere Reduktion des Querschnittes um 19 % durchgeführt wird. Die Walzen 3 und 4 des Duo-Walzgerüstes 15 und des Vierscheiben-Walzgerüstes 16 weisen einen Durchmesser von 320 cm auf. Die Geschwindigkeit des aus dem Vierscheiben-Walzgerüst 16 austretenden Stabstahles 1 beträgt 15 m/sec.Continuous cast billets made of carbon steel, e.g. C10, with a square cross section of 150 mm side length, are in a stretch caliber line with a round cross section rolled with a diameter of 22 mm. Then the bar steels thus formed a first duo mill stand 15 '. This takes place in this duo roll stand 15 ' Reduction of the cross section by 28%. Then another rolling takes place in one second duo mill stand 15 with a stitch reduction of 22% to a tetragonal Cross-section. 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.

Über die Zuganker 58, 59 und hydraulischen Muttern 60, 61 wird beim Vierscheiben-Walzgerüst 16 eine Verspannung von 20 Tonnen ausgeübt.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.

Zur Führung der Stabstähle 1 zwischen den etwa 2,5 m voneinander entfernt angeordneten Walzgerüsten 15 und 16 dienen Führungsrollenpaare 64.To guide the steel bars 1 between the approximately 2.5 m apart Roll stands 15 and 16 serve pairs of guide rollers 64.

Mit dem erfindungsgemäßen Verfahren lassen sich Fertigprodukte mit kreisrundem Querschnitt mit sehr hoher Präzision herstellen, u.zw. sowohl hinsichtlich Maß als auch der Form, z.B. Fertigprodukte im Durchmesserbereich bis 25 mm mit einer Mindesttoleranz von ± 0,1 mm, und im Durchmesserbereich von 25 bis 100 mm mit einer Mindesttoleranz von ± 0,25 % des Durchmessers.With the method according to the invention, 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.

Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung ermöglichen zudem einen vereinfachten Walzbetrieb, insofern, als für unterschiedliche Durchmesser des Endproduktes die der erfindungsgemäßen Profilwalzeinrichtung vorgeordnete Vorstraße keiner Kaliberänderung bedarf; eine Kaliberänderung ist lediglich für die erfindungsgemäße Profilwalzeinrichtung erforderlich, was durch die bei der erfindungsgemäßen Profilwalzeinrichtung gegebene Möglichkeit der großen Variation der Stichabnahme im Durchmesserbereich von mindestens 1:4 gegeben ist. So ist es möglich, ausgehend von ein und demselben der erfindungsgemäßen Profilwalzeinrichtung zugeführten Walzgut ein Fertigprodukt von z.B. 25 bis 100 mm herzustellen. 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.

Weiters kann erfindungsgemäß ein Fertigprodukt mit beliebigem Durchmesser hergestellt werden, d.h. der Durchmesser des Endproduktes kann stufenlos gewählt werden; man ist nicht an Durchmessersprünge gebunden.Furthermore, 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.

Da das Walzgerüst 16 mit geschlossenem Kaliber 6 und vorgespannten Walzen 7 bis 10 im geschlossenen und vorgespannten Zustand bearbeitet werden kann, ist die Herstellung eines bestimmten Kalibers besonders einfach.Since the roll stand 16 with closed caliber 6 and prestressed rolls 7 to 10 in closed and biased condition can be machined is the manufacture of a certain caliber particularly easy.

Claims (14)

  1. Precision-rolling process for producing rolled stock (1) in bar or wire form which is circular in cross section, maintaining tight shape and size tolerances, having the following features:
    rolling of the rolling stock (1) in at least one two-high roll stand (15, 15') with an open pass (5), starting from any desired cross section, to form rolled stock (1) which is polygonal, in particular tetragonal, in cross section,
    guiding the rolled stock (1) over a predetermined distance along one or more longitudinal edges and/or along those surfaces of the rolled stock (1) which adjoin longitudinal edges, to a further roll stand (16), and
    subsequent rolling to form rolled stock (1) which is circular in cross section in at least one closed pass (6), in which rolling forces act on and deform the rolling stock (1) in a star shape from at least three directions.
  2. Precision-rolling process according to Claim 1, characterized in that the rolling stock (1) is rolled in two two-high roll stands (15', 15), which are arranged one behind the other, to form rolled stock (1) which is tetragonal in cross section, and is guided between these two two-high roll stands (15', 15).
  3. Profile-rolling device for producing rolled stock which is circular in cross section and has the following features:
    at least one two-high roll stand (15, 15') with an open, polygonal, in particular tetragonal, roll pass (5),
    a rolled-stock guide (17) which adjoins the two-high. roll stand (15) in the rolling direction (c) and has guide devices (64) which guide the rolled stock (1) emerging from the two-high roll stand (15) on one or more longitudinal edges and/or on the surfaces of the rolled stock which adjoin longitudinal edges of the rolled stock, and
    at least one further roll stand (16) with a closed, circular pass (6) with at least three rolls (7 to 10) arranged in a star shape.
  4. Profile-rolling device according to Claim 3, characterized in that two two-high roll stands (15', 15) with a tetragonal roll pass are provided with a guide arranged between them.
  5. Profile-rolling device according to Claim 3 or 4, characterized in that the rolls (7 to 10) of the further roll stand (16) are supported against one another by way of conical surfaces (7a to 10b), the rolls (7 to 10) being pressed against one another by a screw-down force which exceeds the rolling force by a preloading force.
  6. Profile-rolling device according to one or more of Claims 3 to 5, characterized in that the closed pass (6) has a cross-sectional area which is 5 to 20% smaller than that of the open pass (5) of the two-high roll stand (15).
  7. Profile-rolling device according to one or more of Claims 3 to 6, characterized in that the further roll stand (16) has four rolls (7 to 10), in particular disc rolls, of which only two opposite rolls (7, 8) can be driven by means of a motor, in particular by a common motor, and in that each of the four rolls (7 to 10) bears against a conical surface of a further roll (7 to 10) by way of in each case a conical surface (7a to 10b), each roll (7 to 10) bearing against two adjoining rolls (7 to 10), and a closed flux of force and a frictional drive for the rolls (9, 10) which are not driven by a motor being established via the conical surfaces (7a to 10b) of the rolls (7 to 10).
  8. Profile-rolling device according to Claim 7, characterized in that the driven rolls (7, 8) of the further roll stand (16) have a larger diameter in the shaping surfaces (11, 12) than the rolls (9, 10) which are not driven by means of their own drive.
  9. Profile-rolling device according to Claim 7 or 8, characterized in that those rolls (7, 8) of the further roll stand (16) which can be driven by means of a motor can be displaced towards the two further rolls (9, 10) in the direction of their shafts.
  10. Profile-rolling device according to one or more of Claims 7 to 9, characterized in that the further roll stand (16) has two stand units (62, 63) which are preloaded towards one another by means of tie bars (58, 59) and threaded nuts (60, 61).
  11. Profile-rolling device according to Claim 10, characterized in that the threaded nuts (60, 61) are designed as hydraulic nuts.
  12. Profile-rolling device according to one or more of Claims 3 to 11, characterized in that the two-high roll stand (15) and/or the further roll stand (16) is/are in each case arranged on a stand-changing trolley (19) which can slide along rails into a working position, in which it can be fixed, and can slide out of this position back into an at-rest position.
  13. Profile-rolling device according to one or more of Claims 3 to 12, characterized in that the shaping surfaces (11 to 14) of the rolls (7 to 10) which form the closed pass (6) have a chamfer on the circular edges which adjoin one another (Fig. 1d).
  14. Profile-rolling device according to one or more of Claims 3 to 13, characterized in that the guide devices (64) are formed by shaping rollers.
EP98949818A 1997-11-14 1998-10-21 Precision-rolling method Expired - Lifetime EP1030746B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0193297A AT406644B (en) 1997-11-14 1997-11-14 PRECISION ROLLING METHOD
AT193297 1997-11-14
PCT/AT1998/000255 WO1999025499A1 (en) 1997-11-14 1998-10-21 Precision-rolling method

Publications (2)

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

Family

ID=3524142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98949818A Expired - Lifetime EP1030746B1 (en) 1997-11-14 1998-10-21 Precision-rolling method

Country Status (6)

Country Link
US (1) US6216517B1 (en)
EP (1) EP1030746B1 (en)
JP (1) JP4316796B2 (en)
AT (1) AT406644B (en)
DE (1) DE59804086D1 (en)
WO (1) WO1999025499A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102671937A (en) * 2012-05-07 2012-09-19 陈吉玉 Active precision four-roll mill

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6769279B1 (en) 2002-10-16 2004-08-03 Machine Concepts, Inc. Multiroll precision leveler with automatic shape control
WO2009125074A1 (en) * 2008-04-11 2009-10-15 Siemens Vai Metals Technologies Sas Plant for the reversible rolling of steel strip
FR2938110B1 (en) * 2008-11-06 2013-02-15 Areva Nc METHOD FOR EMPTYING NUCLEAR FUEL TANKS AND MILLING MACHINE BY SHEATH DEFORMATION
DE102010009593A1 (en) * 2010-02-26 2011-09-01 Kocks Technik Gmbh & Co. Kg Roll stand has two rollers with axes around which rollers rotate and guide roller for guiding rolling stock, where guide roller has guide section for partial contact with rolling stock
JP2013180302A (en) * 2012-02-29 2013-09-12 Jfe Steel Corp Method for manufacturing steel excellent in inner quality
CN102910410A (en) * 2012-11-02 2013-02-06 无锡华联科技集团有限公司 Pipe single-roll clamping and conveying mechanism
CN103084416A (en) * 2013-01-31 2013-05-08 中冶南方工程技术有限公司 Horizontal type corrective pinch device
US9459086B2 (en) 2014-02-17 2016-10-04 Machine Concepts, Inc. Shape sensor devices, shape error detection systems, and related shape sensing methods
ES2546577B1 (en) * 2015-03-06 2016-05-12 La Farga Lacambra, S.A.U. Hot rolling roller for thermal copper bars, use of said rolling roller and associated lamination process
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
ITUB20154967A1 (en) * 2015-10-16 2017-04-16 Danieli Off Mecc METHOD AND METAL LAMINATING SYSTEM
US10710135B2 (en) 2016-12-21 2020-07-14 Machine Concepts Inc. Dual-stage multi-roll leveler and work roll assembly
US11833562B2 (en) 2016-12-21 2023-12-05 Machine Concepts, Inc. Dual-stage multi-roll leveler and metal strip material flattening method
KR101813163B1 (en) * 2017-08-31 2017-12-28 한영공업(주) Apparatus For Manufacturing Inner Cable

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1213692A (en) * 1957-10-09 1960-04-04 Moeller & Neumann Gmbh Continuous rolling train for the production of round and square irons
US3360974A (en) * 1965-04-07 1968-01-02 United States Steel Corp Apparatus for treating metal
US3513697A (en) * 1967-08-01 1970-05-26 Frederick L Thayer Hand loaders maximum explosion pressure indicator
US3575028A (en) * 1969-01-28 1971-04-13 Blaw Knox Co Rolling mills
GB1268213A (en) * 1969-04-15 1972-03-22 Thaelmann Schwermaschbau Veb Method of rolling wire in a group of driven roll units
SE381830B (en) * 1971-11-17 1975-12-22 Morgaardshammar Ab KIT TO PRE-TENSION A DUOVAL COUPLE FOR HOT OR COLD ROLLING AND DEVICE FOR PERFORMING THE KIT
AU458531B2 (en) * 1973-08-06 1975-02-27 M.I.M. Rolling Consultants (Aust.) Pty. Ltd. Rod rolling
DE3132646A1 (en) * 1980-08-27 1982-06-09 Daidotokushuko K.K., Nagoya, Aichi ROLLING DEVICE AND METHOD FOR ROLLING ROD-SHAPED MATERIALS
JPS57165101A (en) * 1981-04-03 1982-10-12 Nippon Steel Corp Finish rolling method for rolling material of circular section
DE3445219A1 (en) * 1984-12-12 1986-06-12 Kocks Technik Gmbh & Co, 4010 Hilden ROLL CALIBRATION FOR CONTINUOUSLY WORKING ROD AND WIRE ROLLING MILLS OR -BLOCKS
EP0264850B1 (en) * 1986-10-20 1992-03-25 Sms Schloemann-Siemag Aktiengesellschaft Arrangement for rolling profiled bars within small tolerances
US4858457A (en) * 1988-05-12 1989-08-22 Potucek Frank R Machine and method for making concrete reinforcing bars
JP2667043B2 (en) * 1990-07-12 1997-10-22 住友重機械工業株式会社 Roll stand for rolling mill
DE69224725T2 (en) * 1991-11-29 1998-07-02 Kawasaki Steel Co Four-roll sizing mill for the production of round steel bars
EP0549896B1 (en) * 1991-11-29 1998-03-11 Kawasaki Steel Corporation Four-roller type sizing mill apparatus for producing round steel rods
DE4207298A1 (en) * 1992-03-07 1993-09-09 Schloemann Siemag Ag METHOD AND ROLLING MILL FOR PRECISION ROLLING OF WIRE OR FROM ROLLING GOODS WITH A ROUND SECTION
JP3759201B2 (en) * 1994-12-28 2006-03-22 Ｊｆｅスチール株式会社 Steel bar guide method and guide device
DE19625811A1 (en) * 1995-08-08 1997-02-13 Schloemann Siemag Ag Rolling of rod or wire with narrow tolerances - in a rolling installation, including at least two rolling units of high stiffness positioned one after another
JPH09155401A (en) * 1995-11-30 1997-06-17 Daido Steel Co Ltd 8-roll type rolling mill and rolling method using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102671937A (en) * 2012-05-07 2012-09-19 陈吉玉 Active precision four-roll mill
CN102671937B (en) * 2012-05-07 2014-11-12 陈吉玉 Active precision four-roll mill

Also Published As

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

Similar Documents

Publication Publication Date Title
EP1030746B1 (en) Precision-rolling method
DE2856525A1 (en) METHOD AND DEVICE FOR PROCESSING WITH DIE ROLLERS OR PRINTING ROLLS
DE3636478A1 (en) METHOD AND ARRANGEMENT FOR ROLLING CONTINUOUS PROFILES
EP2429730B1 (en) Feed drive for a cold-pilgering mill
EP0560093B1 (en) Small section-/wire rod mill
EP0449004A2 (en) Method and installation for manufacturing hot-rolled steel strip, in particular for special steels from a continuously cast material
EP3738691A2 (en) Multi-piece rolling tool with floating support and rolling machine
DE102012106991B4 (en) Cross-rolling plant
DE3417500A1 (en) Two-high reversing roll stand, in particular for rolling steel sections
EP0560115A1 (en) Method and rolling mill for precision rolling wire or stock having a circular cross-section
DE1452499A1 (en) Bar or wire rolling and drawing device
DE2659318A1 (en) PROCESS FOR ROLLING ROUND STEEL
DE2556569C2 (en) Process for the manufacture of square billets by rolling
EP0870554B1 (en) Rolling train for rolling flat steel
DE2528850B2 (en) Pilgrim step mill for pipe cold rolling
EP0703014A1 (en) Method for rolling hollow blocks in an Assel rolling mill
EP0542387B1 (en) Method of longitudinal rolling seamless pipes
EP2233224B1 (en) Method for cold forming metal tubes
DE102020215769A1 (en) Hot rolling stand for a hot rolling mill and for the production of a metal flat product, hot rolling mill and method for operating a hot rolling mill
CH651228A5 (en) Process and apparatus for the production of thin and relatively narrow metal strips
DE202023100646U1 (en) Three-high cross-rolling mill for the manufacture of rotationally symmetrical long products in a single-stage rolling process
DE3536046A1 (en) METHOD, SYSTEM AND ROLLING MILL FOR THE PRODUCTION OF SEAMLESS TUBES
DE102022004111A1 (en) Method for cross rolling of blanks with the axial tensile force acting in the rolling caliber
DE19605008A1 (en) Process for rolling hot strip, in particular hot wide strip
DE1527684C (en) Process for rolling beams with H or similar profiles

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000428

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RBV Designated contracting states (corrected)

Designated state(s): DE GB IT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20011002

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT SE

REF Corresponds to:

Ref document number: 59804086

Country of ref document: DE

Date of ref document: 20020613

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020802

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030211

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101018

Year of fee payment: 13

Ref country code: IT

Payment date: 20101027

Year of fee payment: 13

Ref country code: SE

Payment date: 20101014

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20101220

Year of fee payment: 13

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20111021

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120501

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59804086

Country of ref document: DE

Effective date: 20120501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111021

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111021

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111022