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EP0204878B1 - Laminoir en croix - Google Patents

Laminoir en croix Download PDF

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Publication number
EP0204878B1
EP0204878B1 EP19850730071 EP85730071A EP0204878B1 EP 0204878 B1 EP0204878 B1 EP 0204878B1 EP 19850730071 EP19850730071 EP 19850730071 EP 85730071 A EP85730071 A EP 85730071A EP 0204878 B1 EP0204878 B1 EP 0204878B1
Authority
EP
European Patent Office
Prior art keywords
roll
axis
rolling mill
rolling
skew
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
Application number
EP19850730071
Other languages
German (de)
English (en)
Other versions
EP0204878A3 (en
EP0204878A2 (fr
Inventor
Wilhelm Dip.-Ing. Nickel
Klaus-P. Dipl.-Ing. Schirmag
Engelbert Mailänder
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to AT85730071T priority Critical patent/ATE47055T1/de
Publication of EP0204878A2 publication Critical patent/EP0204878A2/fr
Publication of EP0204878A3 publication Critical patent/EP0204878A3/de
Application granted granted Critical
Publication of EP0204878B1 publication Critical patent/EP0204878B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills

Definitions

  • the invention relates to a pipe diagonal rolling mill according to the preamble of patent claim 1.
  • a rolling mill is known from DE-C 8244, in which three driven rollers are likewise arranged around the rolling axis in an equivalent manner.
  • the object of the invention is the formation of an oblique rolling mill for the stretching of hollow bodies into seamless tubes over 168.3 mm in a large diameter range.
  • the cross rolling mill is also designed to produce pipes with normal wall thickness with exact dimensions and uniform dimensions.
  • the cross roll mill should be adaptable to the large diameter ranges and produce pipes of such a quality that, apart from the previous punching and the subsequent sizing, no further manufacturing means are required, so that the investment costs for a system for producing seamless pipes are cheaper than the conventional ones.
  • the solution is based on a deformation intention.
  • the intention is that the quality of the finished pipe is sufficient if the width of the pressed surfaces of all the rolls lying on the circumference of the pipe is greater than or equal to about 1 to 6 and the proposed rolling mill allows this ratio to be greater than the large one Maintain the diameter range of the finished pipes to be manufactured.
  • prefabricated pipe diameters between approx. 200 and approx. 700 mm are intended.
  • the core of the invention is a roll stand on which more or fewer rolls can optionally be arranged in roll units or brought into the working position. In the latter case, the roller units removed from the working position remain in the roll stand. Only one or more roll chocks with their rolls are separated from the maximum assembly of the drive and their chocks are removed from the cross-rolling mill and the remaining roll units are moved so that they are arranged symmetrically about the roll axis.
  • the invention also relates to the roller unit itself, as is considered to be advantageous for such an inclined rolling mill design.
  • the setting options of the rollers correspond fully to the usual ones. However, all of these possibilities themselves are advantageously solved in comparison with conventional designs.
  • FIG. 1 shows an inclined rolling mill, the stand of which consists of the fixed scaffold frames 1, 2 on the foundation 3 and the exchangeable roll stand 4.
  • the rolling stand 4 is ring-shaped and consists of the two cheeks 4a and 4b in Figure 5, between which stops and wedges shown in Figure 1 are present. Between these stops are six roller units 5, 6, 7, 8, 9, 10, which are arranged at the same distance from one another in a centrally symmetrical manner with respect to the roller axis.
  • the rolling axis coincides with the axis of the rolling stock 11.
  • the circles abutting the rolling stock 11 are the cross rollers with shoulder calibration located in front of the roller units 5, 6, 7, 8, 9, 10.
  • roller units 5, 6, 7, 8, 9, 10 are arranged in the roll stand 4 and are effective when they are loaded with rollers.
  • the roller unit 8 has remained in place, but the associated roller has been removed and the roller units 5, 6, 7, 9 and 10 are moved to other positions by changing the wedges in the roll stand 4, so that they are again centrally symmetrical to the rolling stock 11 are arranged at the same distance from each other.
  • FIGS. 1 to 3 show the change in the number of rolls in the example with the rolling stock diameter 11 remaining the same.
  • FIG. 1 should apply to a rolling material diameter 11 that is up to twice as large as that in FIG. 3, so that with a larger circumference of the rolling material 11, a larger number of rollers act on it with approximately the same pressed width per roller.
  • FIG. 5 shows a roll unit inserted into the roll stand 4.
  • the roll stand 4 can be seen in FIG. 5 by the two cheeks 4a and 4b. Between these cheeks, the guide unit is fastened with its outer sleeve 12 by means of clamping wedges 13, 14.
  • the outer sleeve 12 has a circular cross section in the telescopic axially displaceable and rotatable about its axis, the inner sleeve 15 is arranged.
  • the diameter of the inner sleeve 15 corresponds approximately to the distance between the roller bearings 21, 22.
  • the base plate 17 carries the roller 19 with shoulder 20, the roller bearings 21, 22 and the drive clutch 23.
  • an adjusting finger 24 is arranged on the inner end of the sleeve 15 designed as a pickup 16, which is equivalent to the embodiment according to claim 2.
  • the threaded spindle 25 is set in rotation by the worm gear 28 with the motor 29.
  • the threaded nut 30 is located on the threaded spindle 25.
  • the threaded nut 30 is mounted in a tube 31, which in turn is firmly connected to the outer sleeve 12.
  • the threaded spindle is rotatably supported in the disks 26 and 27 on the cylinder 34, 35.
  • the clamping bolt 33 as an extended piston rod of the clamping cylinder 36 pulls the parts 17 to 24 to be moved with the inner sleeve 12 against the spindle 25 without play, the force of the cylinder being greater than the sum of the rolling force plus the clamping force of the cylinder.
  • the displacement drive consisting of the motor 19, the worm gear 28 and the threaded spindle 25, is set in motion.
  • the threaded spindle 25 moves with its upper spline end 32 in the worm gear and is pressed down by the threaded nut 30 in the illustration, for example, so that the roller 19 approaches the lower edge of the blade.
  • the inner sleeve 15 slides in the outer sleeve 12. So that the slack between the parts that are connected to the inner sleeve 15, that is between 16 and 17 and between 25 on the one hand and 27, 26 on the other hand when the roller is turned on and removed again does not bother, these parts are held together by the tensioned bolt 33.
  • a piston-cylinder combination 34, 35 which is acted upon hydraulically, the hydraulic action being able to overcome the tension caused by the bolt 33, which is also hydraulic.
  • This combination is referred to as a quick adjustment device in the later operating description.
  • a setting disk 37 is also provided on the roll stand 4 on the side of the cheek 4a in FIG. In this adjusting disc 37, which is also visible in FIG.
  • crank arms 38 are rotatably mounted, in which radial slots are incorporated, into which adjusting fingers 24 engage.
  • the adjusting disc 37 which can be pivoted about the rolling axis, is held hydraulically in the stand 4 by the drive 39 via the arm 40 against the adjustable stop 41 which is located on the stand 4. This pivoting movement then causes the inclination of the rollers to change rapidly, in that the inner sleeve 15 rotates in the outer sleeve 12.
  • crank arms 38 are connected to one another by linkages 42 and connected to a lever, the fixed point of which, like the mounting of a not shown but known adjusting drive, is arranged on the adjusting disk 37, whereby the radial slots in which the adjusting fingers 24 engage are deflected from their radial direction will.
  • the roll stand is initially set up according to the scheme according to one of FIGS. 1 to 3, the rolls being adjusted by the threaded spindle 25 in connection with the threaded nut 30 to the distance from the rolling axis which coincides with the center of the rolling stock 11.
  • the inner sleeve 15 is rotated with the roller chock and its structures relative to the outer sleeve 12. This is done by tensioning the adjusting disk 37 without the cylinder 39 against the adjusted stop 41 of the adjusting device via the swivel lever 40 on which the adjusting disk 37 is fixedly arranged.
  • This setting of the roller is not taken into account in the illustration in FIG. 5.
  • the roller axis like the roller axis, lies in the paper plane.
  • a mandrel bar may be provided for the rolls.
  • the circular cross section of the pipe produced is warped at the end of the pipe.
  • the rollers have to be moved apart quite suddenly and let the last end of the tube pass unprocessed.
  • the rapid adjustment which consists of the piston-cylinder combination 34, 35, is actuated for the sudden moving apart of the rollers. If the radial slots in the disks 38 are deflected with the longitudinal extension of the slots from the radial direction, the roller is pivoted by the quick adjustment device when the rollers are retracted. The same effect can be achieved by simultaneously swiveling the adjusting disk 37 over the cylinder 38.
  • the slots can be machined radially into the adjusting disk 37 and the disks, including the adjusting drives, can be omitted.
  • the pivoting takes place in such a way that a smaller transport angle is set so that the tube leaves the cross-rolling mill more slowly than when rolling in the rolling direction.

Landscapes

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

Claims (7)

1. Laminoir à cylindres obliques pour tubes, comportant plusieurs cylindres entraînés, munis de cannelures d'épaulement, inclinés par rapport à l'axe de laminage et disposés régulièrement autour de l'axe de laminage, dans un support stationnaire, caractérisé en ce que le support est constitué de châssis de cage stationnaires (1, 2), d'une cage de laminoir (4) sur ceux-ci, le cas échéant échangeable, et d'unités de laminage qui y sont disposées comportant chacune un cylindre, la cage de laminoir (4) étant réalisée de façon annulaire et étant munie de butées et de taquets pour l'agencement à volonté de 4 à 6 unités de laminage (5, 6, 7, 8, 9, 10) ou d'autres combinaisons jusqu'à au maximum 8 unités de laminage, et en ce que l'unité de laminage est constituée de douilles interne et externe à entraînement réglable, desquelles la douille externe (12) est disposée dans la cage de laminoir (4) avec son axe longitudinal perpendiculaire à l'axe de laminage, d'un moyen de réception (16) disposé en bout sur la douille interne (15) et de la pièce de montage de cylindre (17), échangeable en direction de l'axe de laminage sur le moyen de réception (16), ayant un cylindre (19), des paliers de cylindre (21, 22), le couplage d'entraînement (23) et un doigt de réglage (24).
2. Laminoir à cylindres obliques pour tubes selon la revendication 1, caractérisé en ce que la pièce de montage de cylindre (17) avec le cylindre (19) est montée rotative autour de son axe longitudinal par rapport à la douille externe (12).
3. Laminoir à cylindres obliques pour tubes selon la revendication 1 ou 2, caractérisé en ce que l'entraînement réglable est constitué d'une commande filetée entraînée (25, 30) entre la douille externe (12) et la douille interne (15) et/ou d'une combinaison cylindre-piston (35, 34) actionnée hydrauliquement, qui font partie de la douille interne (15).
4. Laminoir à cylindres obliques pour tubes selon la revendication 3, caractérisé en ce que la commande filetée (25, 30) est constituée d'un écrou (30) monté stationnaire dans la douille externe (12) et d'une broche filetée (25), entraînée par la douille externe (12, 31), montée rotative dans la douille interne (15).
5. Laminoir à cylindres obliques pour tubes selon une des revendications précédentes, caractérisé en ce que la cage de laminoir (4) est munie d'un disque de réglage (37) pouvant tourner de façon motorisée autour de l'axe de laminage dans la cage de laminoir (4) et, le cas échéant, échangeable avec la cage de laminoir (4), disque dans lequel s'engagent les doigts de réglage (24) de l'unité de laminage (5, 6, 7, 8, 9, 10), dans des fentes radiales.
6. Laminoir à cylindres obliques pour tubes selon la revendication 5, caractérisé en ce que les fentes radiales sont usinées dans des mécanismes à manivelle et bielle oscillante (38), qui sont agencés dans le disque de réglage (37) de façon réglable, de sorte que les fentes peuvent s'écarter de la direction radiale jusqu'à 30°.
7. Laminoir à cylindres obliques pour tubes selon une des revendications précédentes, caractérisé en ce que l'unité de laminage (5, 6, 7, 8, 9, 10) est agencée autour de l'axe de laminage, de sorte que les couplages d'entraînement (23) d'à chaque fois deux cylindres successifs (19) indiquent le côté d'entrée du laminoir (45) et le côté de sortie du laminoir.
EP19850730071 1985-02-18 1985-05-17 Laminoir en croix Expired EP0204878B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85730071T ATE47055T1 (de) 1985-02-18 1985-05-17 Schraegwalzwerk.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP85730025 1985-02-18
EP85730025 1985-02-18

Publications (3)

Publication Number Publication Date
EP0204878A2 EP0204878A2 (fr) 1986-12-17
EP0204878A3 EP0204878A3 (en) 1987-08-05
EP0204878B1 true EP0204878B1 (fr) 1989-10-11

Family

ID=8194608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850730071 Expired EP0204878B1 (fr) 1985-02-18 1985-05-17 Laminoir en croix

Country Status (2)

Country Link
EP (1) EP0204878B1 (fr)
DE (1) DE3573540D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007406C2 (de) * 1990-03-06 1994-01-20 Mannesmann Ag Verfahren zur Herstellung von mittel- und dünnwandigen nahtlosen Rohren und Walzeinrichtung zur Durchführung des Verfahrens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8244C (de) * A. LONGSDON in London Streckwerk zur Herstellung von Rotationskörpern und schraubenförmig gebildeten Körpern
DE846384C (de) * 1941-05-24 1952-08-11 Demag Ag Schraegwalzwerk mit drei oder mehr Walzen fuer die Herstellung nahtloser Rohre
FR1475645A (fr) * 1965-07-23 1967-04-07 Vallourec Nouveau laminoir à tubes et procédé utilisé pour la mise en oeuvre de ce laminoir
DE2264391A1 (de) * 1972-04-20 1973-11-15 Mannesmann Meer Ag Dreiwalzen schraegwalzwerk
DE2827727C2 (de) * 1978-06-22 1980-08-28 Mannesmann Ag, 4000 Duesseldorf Vorrichtung zum Ändern der Walzenanstellung an einem Dreiwalzenschrägwalzwerk

Also Published As

Publication number Publication date
EP0204878A3 (en) 1987-08-05
EP0204878A2 (fr) 1986-12-17
DE3573540D1 (en) 1989-11-16

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