EP0034806A1 - Apparatus for rolling rings - Google Patents

Apparatus for rolling rings Download PDF

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Publication number
EP0034806A1
EP0034806A1 EP81101175A EP81101175A EP0034806A1 EP 0034806 A1 EP0034806 A1 EP 0034806A1 EP 81101175 A EP81101175 A EP 81101175A EP 81101175 A EP81101175 A EP 81101175A EP 0034806 A1 EP0034806 A1 EP 0034806A1
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EP
European Patent Office
Prior art keywords
rolling mill
vertical
ring rolling
rollers
axial
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EP81101175A
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German (de)
French (fr)
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EP0034806B1 (en
Inventor
Bruno Jakob Brück
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Individual
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Priority to AT81101175T priority Critical patent/ATE5054T1/en
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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 disc-like rings with integrally formed sleeve-shaped extension, in particular so-called welding neck flanges for connecting pipes with the aid of an annular template that can be clamped onto a rotary table, with a spar that is vertically adjustable within a press-like machine frame, on which at least one bearing housing is arranged for a cantilevered tapered axial roller, the lower surface line of which runs parallel to the table plane, ie horizontally, in order to roll off the thickness of a warm-rolled annular disk-shaped blank inserted into the template with circumferential play. As the thickness decreases, the outside diameter of the blank increases until it is centered on the inside diameter of the ring-shaped template.
  • the invention has for its object to further develop a ring rolling mill of the type described in that the bezw during face rolling by means of the conical axial roller. Rolling inwardly displaced material is deformed into a sleeve-shaped extension while maintaining the fiber course by a rolling process.
  • the invention provides that the height-adjustable spar of the ring rolling mill carries at least one horizontally adjustable bearing housing for a cantilevered vertical roll, the diameter of which is considerably smaller than the inside diameter of the blank and which is arranged at an angle to the axial roll (s):
  • 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
  • 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 to within the finished dimension of the inside diameter of the product to be manufactured. range, there is a sharp-edged transition between the flange and the extension, filled with the material, compared to a cylindrical part of a vertical roller.
  • a vertical roller is expediently conical in shape following a cylindrical part and is height-adjustable, so that an initial lowering movement of the vertical roller over its conical end leads to a gradual deflection of the inwardly displaced material of the blank obliquely downwards, after a further lowering of the vertical roller and if necessary, horizontal positioning of the cylindrical part of the vertical roller, the further rolling of the bent attachment to the sleeve-shaped extension with a certain inner diameter. clear width of the finished product takes over.
  • 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 column 5 is guided by the columns 1, 2 and the height can be adjusted via the hydraulic cylinders 6, 7 fixed on 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.
  • To drive the rotation table 4 serve four pinions 10, each with a hydraulic motor unit 11, 12.
  • two slides 14, 15 are guided horizontally adjustable in guides 16, 17.
  • the slides each have a bearing housing 18, 19 for tapered axial rollers 20, 21, the lower surface line of which is parallel to the plane of the rotary table 8, i.e. normal-. runs horizontally, and its axial direction is inclined in the projection according to Fig. 2, i.e. not radial, runs.
  • the two conical axial rollers 20, 21 are arranged approximately diametrically to one another.
  • the carriages 14, 15 also carry bearing housings 22, 23 for vertical rolls 24, 25 with overhung bearings, each of which can be adjusted in height by means of cylinders 26, 27.
  • a hydraulic cylinder 28 is provided, which is carried by the spar 5 in a manner shown in more detail.
  • 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 slides 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.
  • Figure 2 also shows that the conical xialwalzen A 20,21 extend to within a dot-dashed circle 30, the inner diameter D represents 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 downward Holmes rollers 5 d e axial rolls 20,21 the blank in its thickness from, whereby material flows to the outside and disappear the circumferential clearance, not shown, with respect to the template. 9
  • 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 roll 24 is controlled further down when its the inner diameter is set by means of the V erschiebezylinders 28 cylindrical region to the finished D. Practically, 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.
  • FIG. 25 Another mode of operation and thus a further simplified structure of the ring rolling mill is conceivable with a single vertical roller 25 with a cylindrical lateral surface over the length and a single upstream axial roller 21.
  • This cylindrical vertical roller 25 is initially lowered to the position shown extended downwards, but is opposite that Recess in the template 9 for receiving the blank is set to a larger nip than it corresponds to the finished dimension D of the inside diameter of the finished product.
  • the material displaced inward by the face rolling is then rolled down to the right by a continuous horizontal advance of the vertical roll 25, whereby the sleeve-shaped extension 31a of the finished cross section 31 is created.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

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 angeformten hülsenförmigen Fortsatz, insbesondere von sogenannten Vorschweißflanschen zum Anschluß von Rohren mit Hilfe einer ringförmigen Schablone, die auf einen Drehtisch aufspannbar ist, mit innerhalb eines pressenartigen Maschinenrahmens höhenverstellbar geführten Holm, an dem mindestens ein Lagergehäuse für eine fliegend gelagerte kegelige Axialwalze angeordnet ist, deren jeweils untere Mantellinie parallel zur Tischebene, d.h. wagerecht verläuft, um die Dicke einer mit Umfangsspiel in die Schablone eingesetzten walzwarmen ringscheibenförmigen Rohlings abzuwalzen. Mit der Dickenabnahme nimmt der Aussendurchmesser des Rohlings zu, bis er am Innendurchmesser der ringförmigen Schablone zentriert ist. Gleichzeitig nimmt jedoch der Innendurchmesser des Rohlingsab. Das in diese Richtung verdrängte Material wurde bisher durch einen mittigen Dorn nach unten zu dem gewünschten hülsenförmigen Fortsatz abgebogen bezw. abgequetscht.Da sich hierbei eine abgebogene Innenkante zwischen der Ringscheibe bezw. 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 stirnseigiges Planwalzen mittels der kegeligen Axialwalze bezw. -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 bezw. scharfkantig umgelenkt, was festigkeitsmässig unerwünscht ist.The invention relates to a ring rolling mill for the manufacture of disc-like rings with integrally formed sleeve-shaped extension, in particular so-called welding neck flanges for connecting pipes with the aid of an annular template that can be clamped onto a rotary table, with a spar that is vertically adjustable within a press-like machine frame, on which at least one bearing housing is arranged for a cantilevered tapered axial roller, the lower surface line of which runs parallel to the table plane, ie horizontally, in order to roll off the thickness of a warm-rolled annular disk-shaped blank inserted into the template with circumferential play. As the thickness decreases, the outside diameter of the blank increases until it is centered on the inside 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 so far been bent or downward by a central mandrel to the desired sleeve-shaped extension. Squeezed because there is a bent inner edge between the washer or formed 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 or even by face-end facing rolling using the tapered axial roller. -Rolls for a sharp-edged transition between the later connection surface of the ring flange and the Inside diameter of the sleeve-shaped extension is taken care of. However, this always interrupted the fiber path between the ring flange and the sleeve-shaped extension. deflected sharply, 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 kegegeligen Axialwalze bezw. -walzen nach innen verdrängte Material unter Aufrechterhalten des Faserverlaufes durch einen Walzvorgang zum hülsenförmigen Fortsatz umgeformt wird. In Lösung dieser Aufgabe sieht die Erfindung vor, daß der höhenverstellbare Holm des Ringwalzwerkes mindestens ein wagerecht verstellbares Lagergehäuse für eine fliegend gelagerte Vertikalwalze trägt, deren Durchmesser erheblich kleiner als der Innendurchmesser des Rohlinges und die zu der oder den Axialwalzen winkelversetzt angeordnet ist:The invention has for its object to further develop a ring rolling mill of the type described in that the bezw during face rolling by means of the conical axial roller. Rolling inwardly displaced material is deformed into a sleeve-shaped extension while maintaining the fiber course by a rolling process. In solving this problem, the invention provides that the height-adjustable spar of the ring rolling mill carries at least one horizontally adjustable bearing housing for a cantilevered vertical roll, the diameter of which is considerably smaller than the inside diameter of the blank and which is arranged at an angle to the axial roll (s):

Eine zweckmässig als nicht angetriebene Schleppwalze ausgebildete Vertikalwalze kann von innen her über die wagerechte Verstellbarkeit ihres Lagergehäuses gegen den beim Planwalzen nach innen wachsenden Innendurchmesser des Rohlinges angestellt werden, wobei sie wegen ihres relativ kleinen Durchmessers einen regelrechten Walzeffekt begründet, denn die Abnahme eines Walzgutes ist bekanntlich umso 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 bezw. 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 to within the finished dimension of the inside diameter of the product to be manufactured. range, there is a sharp-edged transition between the flange and the extension, filled with the material, compared to a cylindrical part of a vertical roller.

Eine Vertikalwalze ist zweckmässig im Anschluß an einen zylindrischen Teil kegelförmig ausgebildet und höhenverstellbar, sodaß durch eine anfängliche Senkbewegung der Vertikalwalze über ihr kegelförmiges Ende eine allmähliche Umlenkung des nach innen verdrängten Materials des Rohlinges schräg-nach unten erfolgt, wobei nach einem weiteren Absenken der Vertikalwalze und gegebenenfalls wagerechtem Anstellen der zylindrische Teil der Vertikalwalze das weitere Abwalzen des abgebogenen Ansatzes zum hülsenförmigen Fortsatz mit bestimmten Innendurchmesser bezw. lichter Weite des Fertigerzeugnisses übernimmt.A vertical roller is expediently conical in shape following a cylindrical part and is height-adjustable, so that an initial lowering movement of the vertical roller over its conical end leads to a gradual deflection of the inwardly displaced material of the blank obliquely downwards, after a further lowering of the vertical roller and if necessary, horizontal positioning of the cylindrical part of the vertical roller, the further rolling of the bent attachment to the sleeve-shaped extension with a certain inner diameter. clear width of the finished product takes over.

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 wagerecht angestellt wird. Weitere Ausgestaltungen des Ringwalzwerkes gemäß der Erfindung sind in den Patentansprüchen 4 bis 7 angeben, die in der nachfolgenden Zeichnungsbeschreibung näher erläutert werden.This latter effect can also be achieved at the same time by another, approximately diametrically arranged with respect to the first vertical roller with a conical tip, which is cylindrical in length and progressively horizontally adjusted. Further embodiments of the ring rolling mill according to the invention are specified in claims 4 to 7, which are explained in more detail in the following description of the drawings.

In der Zeichnung ist ein Ausführungsbeispiel eines Ringwalzwerkes 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.2 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
  • 1 shows a front view of the ring rolling mill, partially cut, and
  • 2 shows a plan view of the template to illustrate the roller arrangement.

Das pressenartige Maschinengestellt 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 column 5 is guided by the columns 1, 2 and the height can be adjusted via the hydraulic cylinders 6, 7 fixed on 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. To drive the rotation table 4 serve four pinions 10, each with a hydraulic motor unit 11, 12.

Am höhenverstellbaren Holm 5 sind zwei Schlitten 14,15 in Führungen 16,17 wagerecht 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. normaler- . weise wagerecht 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 have a bearing housing 18, 19 for tapered axial rollers 20, 21, the lower surface line of which is parallel to the plane of the rotary table 8, i.e. normal-. runs horizontally, and its axial direction is inclined in the projection according to Fig. 2, i.e. not radial, runs. The two conical 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 wagerechte Verstellung des Schlittens 14 ist ein Hydraulikzylinder 28 vorgesehen, der in näher dargestellter Weise von dem Holm 5 getragen ist. Ein ebensolcher, nicht dargestellter wagerechter Hydraulikzylinder ist auch für den Schlitten 15 vorhanden. Jeder der wagerechten 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 vertical rolls 24, 25 with overhung bearings, each of which can be adjusted in height by means of cylinders 26, 27. For the horizontal adjustment of the slide 14, a hydraulic cylinder 28 is provided, which is carried by the spar 5 in a manner shown in more detail. 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 slides and the vertical rollers can be set via a programmed control.

Wie Fig.2 zeit, 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 Rohlinges 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, den 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. Figure 2 also shows that the conical xialwalzen A 20,21 extend to within a dot-dashed circle 30, the inner diameter D represents 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 wagerechte 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-Rohlinges 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 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-Rohlinges anlaufen und als Schleppwalzen mitgenommen werden. Durch weiteres Abwärtssteuern des Holmes 5 walzen d::e 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 Rohlinges leicht angebogen. Infolge des Übergriffes 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 Innendurchmesser 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, daß das Ringwalzwerk nur eine Vertikalwalze 24 mit Kegelspitze 24a und nur eine vorgeordnete Axialwalze 20 hat.After the rotary table is set in rotation via 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 controlling the downward Holmes rollers 5 d: e axial rolls 20,21 the blank in its thickness from, whereby material flows to the outside and disappear the circumferential clearance, not shown, with respect to the template. 9 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 assault on the Axial roller 20 to within circle 30 with the inside diameter D (FIG. 2), the transition 32b of the intermediate profile is filled with sharp edges. For finish rolling and calibrating the inner diameter D, it may suffice when the vertical roll 24 is controlled further down when its the inner diameter is set by means of the V erschiebezylinders 28 cylindrical region to the finished D. Practically, 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.

Eine andere Wirkungsweise und damit ein weiterer vereinfachter Aufbau des Ringwalzwerkes ist denkbar mit einer einzigen Vertikalwalze 25 mit zylindrischer Mantelfläche über die Länge und einer einzigen vorgeordneten Axialwalze 21. Diese zylindrische Vertikalwalze 25 wird anfänglich auf die dargestellte nach unten ausgefahrene Stellung abgesenkt, ist jedoch gegenüber der Ausnehmung in der Schablone 9 zur Aufnahme des Rohlinges auf einen größeren Walzenspalt eingestellt als es dem Fertigmaß D des Innendurchmessers des Fertigerzeugnisses entspricht. Das durch das Planwalzen nach innen verdrängte Material wird dann durch einen kontinuierlichen wagerechten Vorschub der Vertikalwalze 25 nach rechts niedergewalzt, wodurch der hülsenförmige Fortsatz 31a des Fertigquerschnittes 31 entsteht. Es empfiehlt sich jedoch, zur Beschleunigung des Walzvorganges 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 wagerechten 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 Zwischenquerschnittes 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 wagerechten Anstellen der einen oder anderen Vertikalwalze begleitet sein, wenn diese anfänglich nicht auf den Innendurchmesser D eingestellt wurden. Bei allen bisher beschriebenen Verfahrensweisen wird mittels der kegeligen Axialwalzen 20,21 solange plangewalzt, bis die Axialwalzen an dem stirnseitigen Rand der Schablone 9 auflaufen und damit die Solldicke der Flansches erreicht ist.Another mode of operation and thus a further simplified structure of the ring rolling mill is conceivable with a single vertical roller 25 with a cylindrical lateral surface over the length and a single upstream axial roller 21. This cylindrical vertical roller 25 is initially lowered to the position shown extended downwards, but is opposite that Recess in the template 9 for receiving the blank is set to a larger nip than it corresponds to the finished dimension D of the inside diameter of the finished product. The material displaced inward by the face rolling is then rolled down to the right by a continuous horizontal advance of the vertical roll 25, whereby the sleeve-shaped extension 31a of the finished cross section 31 is created. However, 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 outer 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 of 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. In all the procedures described so far, the conical axial rollers 20, 21 are used for flat rolling until the axial rollers run up on the front edge of the template 9 and thus the nominal thickness of the flange is reached.

Claims (7)

1. Ringwalzwerk zum Herstellen von scheibenartigen Ringen mit angeformtem hülsenartigen Fortsatz, insbesondere von sogenannten Vorschweißflanschen (31) zum Anschluß von Rohren mit Hilfe einer ringförmigen Schablone (9), die auf einen Drehtisch (8) aufspannbar ist, mit innerhalb eines pressenartigen Maschinenrahmens höhenverstellbar ge- führten Holm (5), an dem mindestens ein Lagergehäuse (18,19) für eine fliegend gelagerte kegelige Axialwalze (20,21) angeordnet ist, deren jeweils untere Mantellinie parallel zur Tischeben, d.h. wagerecht, verläuft, um die Dicke eines mit Umfangsspiel in die Schablone eingesetzten walzwarmen Rohlinges von Ringscheibenform abzuwalzen, dadurch gekennzeichnet, daß der Holm (5) mindestens ein wagerecht verstellbares Lagergehäuse (22,23) für eine fliegend gelagerte Vertikalwalze (24,25) trägt, deren Durchmesser erheblich kleiner als der Innendurchmesser des Rohlinges und die zu der oder den Axialwalzen winkelversetzt angeordnet ist.1. Ring rolling mill for the manufacture of disc-like rings with molded sleeve-like extension, in particular of so-called welding neck flanges (31) for connecting pipes with the aid of an annular template (9) which can be clamped onto a turntable (8), with height adjustable within a press-like machine frame - led spar (5), on which at least one bearing housing (18,19) for a cantilevered tapered axial roller (20,21) is arranged, the respective lower surface line parallel to the table plane, ie horizontal, in order to roll the thickness of a warm-rolled blank of annular disk shape inserted into the template with circumferential play, characterized in that the spar (5) carries at least one horizontally adjustable bearing housing (22, 23) for a cantilevered vertical roller (24, 25) , whose diameter is considerably smaller than the inner diameter of the blank and which is arranged at an angle to the axial roller or rollers. 2. Ringwalzwerk nach Anspruch 1, dadurch gekennzeichnet, daß eine Vertikalwalze (24) im Anschluß an einen zylindrischen Teil kegelförmig ausgebildet und höhenverstellbar ist.2. Ring rolling mill according to claim 1, characterized in that a vertical roller (24) following a cylindrical part is conical and is adjustable in height. 3. Ringwalzwerk nach Anspruch 1, dadurch gekennzeichnet, daß eine Vertikalwalze (25) auf ihrer Länge zylindrisch ausgebildet und wagerecht verstellbar ist.3. Ring rolling mill according to claim 1, characterized in that a vertical roller (25) is cylindrical in length and horizontally adjustable. 4. Ringwalzwerk nach Anspruch 2 und 3, dadurch gekennzeichnet, daß beide Vertikalwalzen (24,25) über ihre Lagergehäuse (22,23) je für sich wagerecht und innerhalb ihrer Lagergehäuse je für sich senkrecht verstellbar sind.4. Ring rolling mill according to claim 2 and 3, characterized in that both vertical rollers (24, 25) are horizontally adjustable via their bearing housings (22, 23) each individually and vertically within their bearing housings. 5. Ringwalzwerk nach Anspruch 4, dadurch gekennzeichnet, daß die Lagergehäuse (22,23) für die Vertikalwalzen (24,25) in Sdhlitten (14,15) angeordnet sind, die im höhenverstellbaren Holm (5) wagerecht geführt sind und an denen im Holm festgelegte hydraulische Verstellzylinder (28) angreifen.5. Ring rolling mill according to claim 4, characterized in that the bearing housing (22,23) for the vertical rollers (24,25) in Sdhlitten (14,15) are arranged, which are horizontally guided in the height-adjustable spar (5) and on which in Handle the hydraulic adjusting cylinders (28) that have been fixed to the handlebar. 6. Ringwalzwerk nach Anspruch 5, dadurch gekennzeichnet, daß die Lagergehäuse (18,19) für die Axialwalzen (20,21) von den Schlitten (14,15) getragen sind.6. Ring rolling mill according to claim 5, characterized in that the bearing housing (18,19) for the axial rollers (20,21) are carried by the carriage (14,15). 7. Ringwalzwerk nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei diametral angeordnete kegelige Axialwalzen (20,21) und zwei diametral angeordnete, in Drehrichtung (A) des Drehtisches (8) versetzte Vertikalwalzen (24,25) vorgesehen sind.7. Ring rolling mill according to one or more of the preceding claims, characterized in that two diametrically arranged conical axial rollers (20,21) and two diametrically arranged, in the direction of rotation (A) of the rotary table (8) offset vertical rollers (24,25) are provided.
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.

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DE19803006294 DE3006294A1 (en) 1980-02-20 1980-02-20 RING ROLLING MILL
DE3006294 1980-02-20

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EP0034806B1 EP0034806B1 (en) 1983-10-19

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP0490840A1 (en) * 1990-12-12 1992-06-17 M.T.A. di BOMPANI IVALDO & C. S.N.C. Procedure and means to realise a hub from a metal disc or similar
CN105666134A (en) * 2016-04-13 2016-06-15 张雪燕 Slippage control head of syringe assembling machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810851B4 (en) * 1998-03-13 2006-07-27 Brück, Bruno Jakob Method and device for rolling rings

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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
DE2222608A1 (en) * 1972-05-09 1973-11-22 Rheinstahl Ag RING ROLLING MILL
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

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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 (4)

* 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
DE2222608A1 (en) * 1972-05-09 1973-11-22 Rheinstahl Ag RING ROLLING MILL
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490840A1 (en) * 1990-12-12 1992-06-17 M.T.A. di BOMPANI IVALDO & C. S.N.C. Procedure and means to realise a hub from a metal disc or similar
CN105666134A (en) * 2016-04-13 2016-06-15 张雪燕 Slippage control head of syringe assembling machine

Also Published As

Publication number Publication date
EP0034806B1 (en) 1983-10-19
DE3006294C2 (en) 1989-10-12
ATE5054T1 (en) 1983-11-15
DE3006294A1 (en) 1981-10-01

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