EP0034806B1 - Apparatus for rolling rings - Google Patents

Apparatus for rolling rings Download PDF

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Publication number
EP0034806B1
EP0034806B1 EP81101175A EP81101175A EP0034806B1 EP 0034806 B1 EP0034806 B1 EP 0034806B1 EP 81101175 A EP81101175 A EP 81101175A EP 81101175 A EP81101175 A EP 81101175A EP 0034806 B1 EP0034806 B1 EP 0034806B1
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Prior art keywords
vertical
roll
rolls
shaped
axial
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EP81101175A
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German (de)
French (fr)
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EP0034806A1 (en
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Bruno Jakob Brück
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • 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
    • B21B2035/005—Hydraulic drive motors

Definitions

  • the invention relates to a ring rolling mill for the manufacture of disk-like rings with an integrally formed sleeve-shaped extension, in particular so-called welding neck flanges for connecting pipes.
  • the invention is therefore based on the prior art given by DE-A-2 504 969.
  • the outer diameter of the blank increases until it is centered on the inner diameter of the ring-shaped template.
  • the inside diameter of the blank decreases.
  • the material displaced in this direction has previously been bent or squeezed down by a central mandrel to the desired sleeve-shaped extension.
  • the invention has for its object to further develop a ring rolling mill of the type described in such a way that the material displaced inward during face rolling by means of the tapered axial roll or rolls is shaped into a sleeve-shaped extension while maintaining the fiber course by a rolling process.
  • the invention provides that the vertical roller is conical in connection with a cylindrical part.
  • a vertical roller which is expediently designed as a non-driven trailing roller, can be adjusted from the inside via the horizontal adjustability of its bearing housing against the inside diameter of the blank which grows inward during face rolling, whereby due to its relatively small diameter it creates a real rolling effect, because the acceptance of a rolling stock is known the easier it is to accomplish, the smaller the curvature of the roll surface compared to the curvature of the rolling stock, which is infinitely large when rolling bars and sheets.
  • This rolling of the inwardly displaced material has the result that the material is redirected into the sleeve-shaped extension with regular bending of the fibers.
  • tapered axial roller or rollers extends within the finished dimension of the inside diameter of the product to be manufactured, there is a sharp-edged transition between the flange and the extension, which is filled with material, compared to a cylindrical part of a vertical roller.
  • the press-like machine frame comprises two columns 1, 2, which are connected to one another by an upper cross member 3 and a lower cross member 4.
  • a pillar 5 is guided by the columns 1, 2 and its height can be adjusted by means of the hydraulic cylinders 6, 7 fixed to the upper cross member 3.
  • a rotary table 8 is arranged on the lower cross member 4, on which an annular template 9 can be clamped.
  • Four pinions 10, each with a hydraulic motor unit 11, 12 serve to drive the turntable 4.
  • two slides 14, 15 are guided horizontally adjustable in guides 16, 17.
  • the slides each carry a bearing housing 18, 19 for tapered axial rollers 20, 21, the respective lower surface line of which is parallel to the plane of the turntable 8, i. H. normally runs horizontally, and their axial direction in the projection of FIG. 2 obliquely, d. H. not radial, runs.
  • the two tapered axial rollers 20, 21 are arranged approximately diametrically to one another.
  • the carriages 14, 15 also carry bearing housings 22, 23 for vertically supported vertical rollers 24, 25, each of which has its own cylinder 26, 27 are adjustable in height.
  • a hydraulic cylinder 28 is provided, which is carried by the spar 5 in a manner not shown.
  • horizontal hydraulic cylinder is also available for the carriage 15.
  • Each of the horizontal cylinders is to be operated independently, as are the cylinders 26, 27 for the height adjustment of the vertical rollers, but a partially overlapping movement play of the slide and the vertical rollers can be set via a programmed control.
  • the vertical rollers 24, 25 are also arranged approximately diametrically, but lagging angularly offset in the direction of rotation A of the rotary table 8 with respect to the closest axial roller.
  • the vertical rolls thus process a blank inserted into the template 9 from the inside after and while the upper end face of the blank is processed by a shortly before arranged axial roll in the sense of a decrease in thickness.
  • Fig. 2 also shows that the tapered axial rollers 20, 21 extend within a dot-dash circle 30 which represents the inside diameter D of the finished product.
  • the spar 5 is steered downwards by means of the cylinders 6, 7 until the tapered axial rollers 20, 21 start on the upper end face of the blank ring disk and are taken along as drag rollers.
  • the axial rollers 20, 21 roll the blank in its thickness, as a result of which material flows outwards and the circumferential play (not shown) relative to the template 9 disappears.
  • the blank is centered in the template. Material also flows inwards through this face rolling.
  • the vertical roller 24, which has a conical tip 24a following a cylindrical part is lowered by means of the cylinder 26 into the height position shown.
  • the inwardly displaced material in the intermediate cross section 32 flows obliquely inwards in an extension 32a due to the cone tip 24a. Accordingly, the fibers are slightly bent inside the blank.
  • the transition 32b of the intermediate profile is filled with sharp edges.
  • the vertical roller 24 is controlled further downward if its cylindrical region is set to the finished dimension D of the inner diameter by means of the displacement cylinder 28. In practice, this means that the ring rolling mill has only one vertical roller 24 with a conical tip 24a and only one upstream axial roller 20.
  • both vertical rollers are adjusted to the finished dimension D of the inside diameter (circle 30 in FIG. 2) with regard to their horizontal adjustability, the vertical roller 24 being continuously adjusted downwards with the cone tip.
  • the progressive change in the intermediate cross-section 32 with respect to the formation of the inward extension 32a is then rolled by the vertical roller 25 after a rotation of 180 °.
  • these processes can also be accompanied by horizontal positioning of one or the other vertical roller if these were not initially set to the inside diameter D.
  • the conical axial rollers 20, 21 are used to flat-face until the axial rollers run up against the front edge of the template 9 and the desired thickness of the flanges is thus achieved.

Abstract

1. Apparatus for rolling rings for the production of disk-like rings sleeve-like extensions formed thereon, especially for the production of so-called welded neck flanges (31) used for the connection of pines, with the aid of a ring-shaped template (9) which may be mounted on a turntable (8), with a cross beam (5) supported for vertical adjustment in a press type machine frame and provided with at least one bearing box (18, 19) for at least one overhung coneshaped axial roll (20, 21), the lower generating line of which is positioned parallel, i.e. horizontally to the table plane to roll down the thickness of a hot-rolled annular disk-shaped blank in its circumferentially floating position inside the template, the cross beam (5) being provided with at least one horizontally adjustable bearing box (22, 23) to hold an overhung vertically adjustable vertical roll (25), the diameter of which is considerably smaller then the inside diameter of the blank and the position of which is angularly transposed to the axial roll or rolls, characterized in that a cylindrical section of the vertical roll (24) is followed by a cone-shaped section.

Description

Die Erfindung betrifft ein Ringwalzwerk zum Herstellen von scheibenartigen Ringen mit angeformtem hülsenförmigen Fortsatz, insbesondere von sogenannten Vorschweißflanschen zum Anschluß von Rohren gemäß Oberbegriff von Patentanspruch 1. Die Erfindung geht damit von dem durch die DE-A-2 504 969 gegebenen Stand der Technik aus. Mit der Dickenabnahme nimmt der Außendurchmesser des Rohlings zu, bis er am Innendurchmesser der ringförmigen Schablone zentriert ist. Gleichzeitig nimmt jedoch der Innendurchmesser des Rohlings ab. Das in diese Richtung verdrängte Material wurde bisher durch einen mittigen Dorn nach unten zu dem gewünschten hülsenförmigen Fortsatz abgebogen bzw. abgequetscht. Da sich hierbei eine abgebogene Innenkante zwischen der Ringscheibe bzw. dem Flansch des herzustellenden Erzeugnisses und dem hülsenförmigen Fortsatz bildete, mußte es nach dem bisher angewendeten Verfahren stirnseitig abgedreht werden, oder man hat durch weiteres stirnseitiges Planwalzen mittels der kegeligen Axialwalze bzw. -walzen für einen scharfkantigen Übergang zwischen der späteren Anschlußfläche des Ringflansches und dem Innendurchmesser des hülsenförmigen Fortsatzes gesorgt. Stets wurde hierdurch jedoch der Faserverlauf zwischen dem Ringflansch und dem hülsenförmigen Fortsatz unterbrochen bzw. scharfkantig umgelenkt, was festigkeitsmäßig unerwünscht ist.The invention relates to a ring rolling mill for the manufacture of disk-like rings with an integrally formed sleeve-shaped extension, in particular so-called welding neck flanges for connecting pipes. The invention is therefore based on the prior art given by DE-A-2 504 969. As the thickness decreases, the outer diameter of the blank increases until it is centered on the inner diameter of the ring-shaped template. At the same time, however, the inside diameter of the blank decreases. The material displaced in this direction has previously been bent or squeezed down by a central mandrel to the desired sleeve-shaped extension. Since a bent inner edge was formed between the ring disk or the flange of the product to be manufactured and the sleeve-shaped extension, it had to be turned off on the face side according to the previously used method, or one had to do further face rolling by means of the conical axial roller or rollers for one sharp-edged transition between the subsequent connection surface of the ring flange and the inner diameter of the sleeve-shaped extension. However, this always interrupted the fiber path between the ring flange and the sleeve-shaped extension or redirected it with sharp edges, which is undesirable in terms of strength.

Der Erfindung liegt die Aufgabe zugrunde, ein Ringwalzwerk der beschriebenen Art dahingehend weiterzuentwickeln, daß das beim Planwalzen mittels der kegeligen Axialwalze bzw. -walzen nach innen verdrängte Material unter Aufrechterhalten des Faserverlaufs durch einen Walzvorgang zum hülsenförmigen Fortsatz umgeformt wird. In Lösung dieser Aufgabe sieht die Erfindung vor, daß die Vertikalwalze im Anschluß an einen zylindrischen Teil kegelförmig ausgebildet ist.The invention has for its object to further develop a ring rolling mill of the type described in such a way that the material displaced inward during face rolling by means of the tapered axial roll or rolls is shaped into a sleeve-shaped extension while maintaining the fiber course by a rolling process. To achieve this object, the invention provides that the vertical roller is conical in connection with a cylindrical part.

Eine zweckmäßig als nicht angetriebene Schleppwalze ausgebildete Vertikalwalze kann von innen her über die waagerechte Verstellbarkeit ihres Lagergehäuses gegen den beim Planwalzen nach innen wachsenden Innendurchmesser des Rohlings angestellt werden, wobei sie wegen ihres relativ kleinen Durchmessers einen regelrechten Walzeffekt begründet, denn die Abnahme eines Walzgutes ist bekanntlich um so leichter zu bewerkstelligen, je kleiner die Krümmung der Walzen-Oberfläche gegenüber der Krümmung des Walzgutes ist, die beim Walzen von Stäben und Blechen unendlich groß ist. Dieses Abwalzen des nach innen verdrängten Materials hat zur Folge, daß das Material unter regelmäßiger Umbiegung der Fasern in den hülsenförmigen Fortsatz umgeleitet wird. Da die kegelige Axialwalze oder -walzen bis innerhalb des Fertigmaßes des Innendurchmessers des herzustellenden Erzeugnisses reicht bzw. reichen, ergibt sich gegenüber einem zylindrischen Teil einer Vertikalwalze ein vom Material ausgefüllter, scharfkantiger Übergang zwischen Flansch und Fortsatz.A vertical roller, which is expediently designed as a non-driven trailing roller, can be adjusted from the inside via the horizontal adjustability of its bearing housing against the inside diameter of the blank which grows inward during face rolling, whereby due to its relatively small diameter it creates a real rolling effect, because the acceptance of a rolling stock is known the easier it is to accomplish, the smaller the curvature of the roll surface compared to the curvature of the rolling stock, which is infinitely large when rolling bars and sheets. This rolling of the inwardly displaced material has the result that the material is redirected into the sleeve-shaped extension with regular bending of the fibers. Since the tapered axial roller or rollers extends within the finished dimension of the inside diameter of the product to be manufactured, there is a sharp-edged transition between the flange and the extension, which is filled with material, compared to a cylindrical part of a vertical roller.

Die im Anschluß an einen zylindrischen Teil kegelförmig ausgebildete Vertikalwalze ergibt durch eine anfängliche Senkbewegung der Vertikalwalze über ihr kegelförmiges Ende eine allmähliche Umlenkung des nach innen verdrängten Materials des Rohlings schräg nach unten, wobei nach einem weiteren Absenken der Vertikalwalze und gegebenenfalls waagerechtem Anstellen der zylindrische Teil der Vertikalwalze das weitere Abwalzen des abgebogenen Ansatzes zum hülsenförmigen Fortsatz mit bestimmtem Innendurchmesser bzw. lichter Weite des Fertigerzeugnisses übernimmt.The subsequent to a cylindrical part conical vertical roller results in an initial lowering movement of the vertical roller over its conical end a gradual deflection of the inwardly displaced material of the blank obliquely downwards, whereby after a further lowering of the vertical roller and, if necessary, horizontal adjustment of the cylindrical part of the Vertical roll takes over the further rolling of the bent approach to the sleeve-shaped extension with a certain inner diameter or clear width of the finished product.

Diese letztere Wirkung kann auch gleichzeitig durch eine weitere, etwa diametral zur ersten Vertikalwalze mit kegeliger Spitze angeordnete zweite Vertikalwalze erzielt werden, die auf ihrer Länge zylindrisch ausgebildet ist und fortschreitend waagerecht angestellt wird. Weitere Ausgestaltungen des Ringwalzwerkes gemäß der Erfindung sind in den Patentansprüchen 3 bis 6 angegeben, die in der nachfolgenden Zeichnungsbeschreibung näher erläutert werden.This latter effect can also be achieved at the same time by a further, approximately diametrically arranged to the first vertical roller with a tapered tip, a second vertical roller which is cylindrical in length and progressively adjusted horizontally. Further refinements of the ring rolling mill according to the invention are specified in claims 3 to 6, which are explained in more detail in the following description of the drawings.

In der Zeichnung ist ein Ausführungsbeispiel eines Ringwalzwerks gemäß der Erfindung für die Herstellung von sogenannten Vorschweißflanschen mit zwei kegeligen Axialwalzen und zwei Vertikalwalzen dargestellt, und zwar zeigt

  • Fig. 1 eine Vorderansicht des Ringwalzwerkes, teilweise geschnitten, und
  • Fig. eine Draufsicht auf die Schablone zur Verdeutlichung der Walzenanordnung.
In the drawing, an embodiment of a ring rolling mill according to the invention for the production of so-called welding neck flanges with two tapered axial rolls and two vertical rolls is shown, namely shows
  • Fig. 1 is a front view of the ring rolling mill, partially cut, and
  • Fig. A plan view of the template to illustrate the roller assembly.

Das pressenartige Maschinengestell umfaßt zwei Säulen 1, 2, die durch eine obere Traverse 3 und eine untere Traverse 4 miteinander verbunden sind. Von den Säulen 1, 2 ist ein Holm 5 geführt, der über die an der oberen Traverse 3 festgelegten Hydraulikzylinder 6, 7 in der Höhe verstellt werden kann. Auf der unteren Traverse 4 ist ein Drehtisch 8 angeordnet, auf den eine ringförmige Schablone 9 aufspannbar ist. Zum Antrieb des Drehtisches 4 dienen vier Ritzel 10 mit jeweils einem hydraulischen Motoraggregat 11,12.The press-like machine frame comprises two columns 1, 2, which are connected to one another by an upper cross member 3 and a lower cross member 4. A pillar 5 is guided by the columns 1, 2 and its height can be adjusted by means of the hydraulic cylinders 6, 7 fixed to the upper cross member 3. A rotary table 8 is arranged on the lower cross member 4, on which an annular template 9 can be clamped. Four pinions 10, each with a hydraulic motor unit 11, 12 serve to drive the turntable 4.

Am höhenverstellbaren Holm 5 sind zwei Schlitten 14, 15 in Führungen 16, 17 waagerecht verstellbar geführt. Die Schlitten tragen je ein Lagergehäuse 18,19 für kegelige Axialwalzen 20, 21, deren jeweils untere Mantellinie parallel zur Ebene des Drehtisches 8, d. h. normalerweise waagerecht verläuft, und deren Achsrichtung in der Projektion nach Fig. 2 schräg, d. h. nicht radial, verläuft. Die beiden kegeligen Axialwalzen 20, 21 sind etwa diametral zueinander angeordnet.On the height-adjustable spar 5, two slides 14, 15 are guided horizontally adjustable in guides 16, 17. The slides each carry a bearing housing 18, 19 for tapered axial rollers 20, 21, the respective lower surface line of which is parallel to the plane of the turntable 8, i. H. normally runs horizontally, and their axial direction in the projection of FIG. 2 obliquely, d. H. not radial, runs. The two tapered axial rollers 20, 21 are arranged approximately diametrically to one another.

Die Schlitten 14, 15 tragen ferner Lagergehäuse 22, 23 für fliegend gelagerte Vertikalwalzen 24, 25, die über Zylinder 26, 27 je für sich höhenverstellbar sind. Für die waagerechte Verstellung des Schlittens 14 ist ein Hydraulikzylinder 28 vorgesehen, der in nicht näher dargestellter Weise von dem Holm 5 getragen ist. Ein ebensolcher, nicht dargestellter waagerechter Hydraulikzylinder ist auch für den Schlitten 15 vorhanden. Jeder der waagerechten Zylinder ist für sich zu betätigen, ebenso die Zylinder 26, 27 für die Höhenverstellung der Vertikalwalzen, jedoch kann über eine programmierte Steuerung ein sich zum Teil überschneidendes Bewegungsspiel der Schlitten und der Vertikalwalzen eingestellt werden.The carriages 14, 15 also carry bearing housings 22, 23 for vertically supported vertical rollers 24, 25, each of which has its own cylinder 26, 27 are adjustable in height. For the horizontal adjustment of the carriage 14, a hydraulic cylinder 28 is provided, which is carried by the spar 5 in a manner not shown. The same, not shown, horizontal hydraulic cylinder is also available for the carriage 15. Each of the horizontal cylinders is to be operated independently, as are the cylinders 26, 27 for the height adjustment of the vertical rollers, but a partially overlapping movement play of the slide and the vertical rollers can be set via a programmed control.

Wie Fig. 2 zeigt, sind auch die Vertikalwalzen 24, 25 etwa diametral angeordnet, jedoch in Drehrichtung A des Drehtisches 8 gegenüber der nächstliegenden Axialwalze nacheilend winkelversetzt. Die Vertikalwalzen bearbeiten somit einen in die Schablone 9 eingesetzten Rohling von innen, nachdem und während die obere Stirnfläche des Rohlings durch eine kurz vorher angeordnete Axialwalze im Sinne einer Dickenabnahme bearbeitet wird. Fig. 2 zeigt auch, daß die kegeligen Axialwalzen 20, 21 bis innerhalb eines strichpunktierten Kreises 30 reichen, der den Innendurchmesser D des Fertigerzeugnisses repräsentiert.As shown in FIG. 2, the vertical rollers 24, 25 are also arranged approximately diametrically, but lagging angularly offset in the direction of rotation A of the rotary table 8 with respect to the closest axial roller. The vertical rolls thus process a blank inserted into the template 9 from the inside after and while the upper end face of the blank is processed by a shortly before arranged axial roll in the sense of a decrease in thickness. Fig. 2 also shows that the tapered axial rollers 20, 21 extend within a dot-dash circle 30 which represents the inside diameter D of the finished product.

Die Wirkungsweise des dargestellten Ringwalzwerkes ist folgende:

  • Es soll ein sogenannter Vorschweißflansch hergestellt werden, dessen Fertigquerschnitt 31 auf der rechten Zeichnungshälfte im Bereich der Vertikalwalze 25 dargestellt ist. Die Schablone 9 hat eine Ausnehmung, die dem Verlauf der Außenflächen des herzustellenden Vorschweißflansches entspricht. Die waagerechte Kreisringfläche 9a der Schablone 9 nimmt einen walzwarmen Rohling mit Umfangsspiel gegenüber der senkrechten Begrenzungsfläche 9b der Ausnehmung in der Schablone 9 auf. Die Dicke des Ringscheiben-Rohlings übersteigt die obere Stirnfläche der Schablone 9, wie im Zwischenquerschnitt 32 im Bereich der Vertikalwalze 24 dargestellt ist.
The operation of the ring rolling mill shown is as follows:
  • A so-called welding neck flange is to be produced, the finished cross section 31 of which is shown on the right half of the drawing in the area of the vertical roller 25. The template 9 has a recess which corresponds to the course of the outer surfaces of the welding neck flange to be produced. The horizontal circular ring surface 9a of the template 9 receives a warm-rolled blank with circumferential play relative to the vertical boundary surface 9b of the recess in the template 9. The thickness of the ring disk blank exceeds the upper end face of the template 9, as is shown in the intermediate cross section 32 in the region of the vertical roller 24.

Nachdem der Drehtisch über seine Antriebe 10 bis 12 in Drehung versetzt ist, wird der Holm 5 mittels der Zylinder 6, 7 abwärts gesteuert, bis die kegeligen Axialwalzen 20, 21 an der oberen Stirnfläche des Ringscheiben-Rohlings anlaufen und als Schleppwalzen mitgenommen werden. Durch weiteres Abwärtssteuern des Holmes 5 walzen die Axialwalzen 20, 21 den Rohling in seiner Dicke ab, wodurch Material nach außen fließt und das nicht dargestellte Umfangsspiel gegenüber der Schablone 9 verschwindet. Hierdurch ist der Rohling in der Schablone zentriert. Es fließt durch dieses Planwalzen aber auch Material nach innen. Während oder bereits vor dem Planwalzen wird die Vertikalwalze 24, die im Anschluß an einen zylindrischen Teil eine Kegelspitze 24a aufweist, mittels des Zylinders 26 in die dargestellte Höhenlage abgesenkt. Es ist in der linken Zeichnungshälfte erkennbar, daß das nach innen verdrängte Material im Zwischenquerschnitt 32 aufgrund der Kegelspitze 24a in einem Fortsatz 32a schräg nach innen fließt. Entsprechend werden die Fasern innerhalb des Rohlings leicht angebogen. Infolge des Übergriffs der Axialwalze 20 bis innerhalb des Kreises 30 mit dem Innendurchmesser D (Fig. 2) wird hierbei der Übergang 32b des Zwischenprofils scharfkantig ausgefüllt. Zum Fertigwalzen und Kalibrieren des Innendurchmessers D kann es genügen, wenn die Vertikalwalze 24 weiter abwärts gesteuert wird, wenn ihr zylindrischer Bereich auf das Fertigmaß D des Innendurchmessers mittels des Verschiebezylinders 28 eingestellt ist. Praktisch bedeutet dies, da'ß das Ringwalzwerk nur eine Vertikalwalze 24 mit Kegelspitze 24a und nur eine vorgeordnete Axialwalze 20 hat.After the turntable is rotated by its drives 10 to 12, the spar 5 is steered downwards by means of the cylinders 6, 7 until the tapered axial rollers 20, 21 start on the upper end face of the blank ring disk and are taken along as drag rollers. By further downward steering of the spar 5, the axial rollers 20, 21 roll the blank in its thickness, as a result of which material flows outwards and the circumferential play (not shown) relative to the template 9 disappears. As a result, the blank is centered in the template. Material also flows inwards through this face rolling. During or before the face rolling, the vertical roller 24, which has a conical tip 24a following a cylindrical part, is lowered by means of the cylinder 26 into the height position shown. It can be seen in the left half of the drawing that the inwardly displaced material in the intermediate cross section 32 flows obliquely inwards in an extension 32a due to the cone tip 24a. Accordingly, the fibers are slightly bent inside the blank. As a result of the overlap of the axial roller 20 to within the circle 30 with the inner diameter D (FIG. 2), the transition 32b of the intermediate profile is filled with sharp edges. To finish rolling and calibrating the inner diameter D, it may be sufficient if the vertical roller 24 is controlled further downward if its cylindrical region is set to the finished dimension D of the inner diameter by means of the displacement cylinder 28. In practice, this means that the ring rolling mill has only one vertical roller 24 with a conical tip 24a and only one upstream axial roller 20.

Es empfiehlt sich zur Beschleunigung des Walzvorgangs zwei diametral angeordnete Axialwalzen 20, 21 und zwei diametral angeordnete Vertikalwalzen 24, 25 mit der dargestellten Unterschiedlichkeit deren äußerer Gestaltung vorzusehen und über eine hydraulische Steuerung mit beiden Vertikalwalzen gleichzeitig zu arbeiten. Hierbei werden beide Vertikalwalzen hinsichtlich ihrer waagerechten Verstellbarkeit auf das Fertigmaß D des Innendurchmessers (Kreis 30 in Fig. 2) eingestellt, wobei die Vertikalwalze 24 mit der Kegelspitze kontinuierlich abwärts verstellt wird. Die fortschreitende Änderung des Zwischenquerschnitts 32 hinsichtlich der Ausbildung des nach innen gerichteten Fortsatzes 32a wird dann nach 180° Umdrehung durch die Vertikalwalze 25 beigewalzt. Selbstverständlich können diese Vorgänge auch von einem waagerechten Anstellen der einen oder anderen Vertikalwalze begleitet sein, wenn diese anfänglich nicht auf den Innendurchmesser D eingestellt wurden.To accelerate the rolling process, it is advisable to provide two diametrically arranged axial rolls 20, 21 and two diametrically arranged vertical rolls 24, 25 with the illustrated differences in their external design and to work with both vertical rolls simultaneously via a hydraulic control. Both vertical rollers are adjusted to the finished dimension D of the inside diameter (circle 30 in FIG. 2) with regard to their horizontal adjustability, the vertical roller 24 being continuously adjusted downwards with the cone tip. The progressive change in the intermediate cross-section 32 with respect to the formation of the inward extension 32a is then rolled by the vertical roller 25 after a rotation of 180 °. Of course, these processes can also be accompanied by horizontal positioning of one or the other vertical roller if these were not initially set to the inside diameter D.

Bei allen bisher beschriebenen Verfahrensweisen wird mittels der kegeligen Axiaiwalzen 20, 21 so lange plangewalzt, bis die Axialwalzen an dem stirnseitigen Rand der Schablone 9 auflaufen und damit die Solldicke der Flansche erreicht ist.In all the procedures described so far, the conical axial rollers 20, 21 are used to flat-face until the axial rollers run up against the front edge of the template 9 and the desired thickness of the flanges is thus achieved.

Claims (6)

1. Apparatus for rolling rings for the production of disk-like rings with sleeve-like extensions formed thereon, especially for the production of so-called welded neck flanges (31) used for the connection of pipes, with the aid of a ring-shaped template (9) which may be mounted on a turntable (8), with a cross beam (5) supported for vertical adjustment in a press type machine frame and provided with at least one bearing box (18, 19) for at least one overhung coneshaped axial roll (20, 21), the lower generating line of which is positioned parallel, i.e. horinzontally to the table plane to roll down the thickness of a hot-rolled annular disk-shaped blank in its circumferentially floating position inside the template, the cross beam (5) being provided with at least one horizontally adjustable bearing box (22, 23) to hold an overhung vertically adjustable vertical roll (25), the diameter of which is considerably smaller than the inside diameter of the blank and the position of which is angularly transposed to the axial roll or rolls, characterized in that a cylindrical section of the vertical roll (24) is followed by a cone-shaped section.
2. Apparatus for rolling rings according to Claim 1, characterized in that a further vertical roll (25) is shaped cylindrically over its entire length.
3. Apparatus for rolling rings according to Claim 1 or 2, characterized in that each of the two vertical rolls (24, 25) may be independently adjusted in the horizontal direction via their respective bearing boxes (22, 23) and in the vertical direction within their bearing boxes.
4. Apparatus for rolling rings according to Claim 3, characterized in that the bearing boxes (22, 23) for the vertical rolls (24, 25) are arranged in slides (14, 15) which are guided horizontally in the vertically adjustable cross beam (5) and which are actuated by hydraulic adjusting cylinders (28) fixed in the cross beam.
5. Apparatus for rolling rings according to Claim 4, characterized in that the bearing boxes (18, 19) for the axial rolls (20, 21) are carried by the slides (14,15).
6. Apparatus for rolling rings according to one or several of the foregoing Claims, characterized in that the apparatus utilizes two diametrically positioned cone-shaped axial rolls (20, 21) and two diametrically positioned vertical rolls (24, 25) transposed in the turning direction of the turntable (8).
EP81101175A 1980-02-20 1981-02-19 Apparatus for rolling rings Expired EP0034806B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101175T ATE5054T1 (en) 1980-02-20 1981-02-19 RING ROLLING MILL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803006294 DE3006294A1 (en) 1980-02-20 1980-02-20 RING ROLLING MILL
DE3006294 1980-02-20

Publications (2)

Publication Number Publication Date
EP0034806A1 EP0034806A1 (en) 1981-09-02
EP0034806B1 true EP0034806B1 (en) 1983-10-19

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EP81101175A Expired EP0034806B1 (en) 1980-02-20 1981-02-19 Apparatus for rolling rings

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EP (1) EP0034806B1 (en)
AT (1) ATE5054T1 (en)
DE (1) DE3006294A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1242945B (en) * 1990-12-12 1994-05-18 Bompani Ivaldo Mta PROCEDURE AND MEANS FOR MAKING A HUB IN A SHEET METAL DISC OR SIMILAR
DE19810851B4 (en) * 1998-03-13 2006-07-27 Brück, Bruno Jakob Method and device for rolling rings
CN105666134A (en) * 2016-04-13 2016-06-15 张雪燕 Slippage control head of syringe assembling machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE658592C (en) * 1936-03-11 1938-04-06 Ferndorf Eisen Metall Process for the production of rings, in particular of large flange rings
FR2183988A1 (en) * 1972-05-09 1973-12-21 Rheinstahl Ag
DE2504969A1 (en) * 1975-02-06 1976-08-19 Horst Schenk Annular workpiece rolling mill - forms blank in revolving guide by radially acting mandrel roll and axial rolls

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE43328C (en) * 1887-06-01 1888-05-19 J. MUN-TON in Maywood, Illinois, V. St. A Wheel rim rolling mill
US1781140A (en) * 1923-12-10 1930-11-11 Taylor James Hall Universal ring-rolling machine
US2132370A (en) * 1938-02-25 1938-10-04 Henry M Hubbard Metal rolling apparatus and method for annular work
DE811832C (en) * 1950-02-25 1951-08-23 Adolf Kreuser G M B H Device for pressure transmission in a radial disk rolling mill
FR2040631A5 (en) * 1969-04-08 1971-01-22 Cordonnier Jean Rolling mill for rolling circular products
DD142853A1 (en) * 1979-04-16 1980-07-16 Wenke Karl Heinz METHOD FOR PRODUCING WELDED PROFILED RINGS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE658592C (en) * 1936-03-11 1938-04-06 Ferndorf Eisen Metall Process for the production of rings, in particular of large flange rings
FR2183988A1 (en) * 1972-05-09 1973-12-21 Rheinstahl Ag
DE2504969A1 (en) * 1975-02-06 1976-08-19 Horst Schenk Annular workpiece rolling mill - forms blank in revolving guide by radially acting mandrel roll and axial rolls

Also Published As

Publication number Publication date
ATE5054T1 (en) 1983-11-15
DE3006294A1 (en) 1981-10-01
EP0034806A1 (en) 1981-09-02
DE3006294C2 (en) 1989-10-12

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