EP0016422B1 - Straightening machine for thin-walled pipes - Google Patents

Straightening machine for thin-walled pipes Download PDF

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Publication number
EP0016422B1
EP0016422B1 EP80101302A EP80101302A EP0016422B1 EP 0016422 B1 EP0016422 B1 EP 0016422B1 EP 80101302 A EP80101302 A EP 80101302A EP 80101302 A EP80101302 A EP 80101302A EP 0016422 B1 EP0016422 B1 EP 0016422B1
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European Patent Office
Prior art keywords
frames
roller
rotation
rollers
frame
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EP80101302A
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German (de)
French (fr)
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EP0016422A1 (en
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Hans Lindemann
Wolfgang Dr.-Ing. Dipl.-Phys. Lindemann
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/06—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged inclined to a revolving flier rolling frame

Definitions

  • the invention relates to a straightening machine consisting of a plurality of individual machines arranged one behind the other in the direction of movement of a thin-walled tube, each with a frame that can be driven all round, according to the preamble of claim 1.
  • Such a generic straightening machine by means of which the thin-walled tube can be secured against twisting and which is provided with rollers that can be adjusted transversely to the tube and that can be inclined relative to the tube axis, the rotational speeds of the frames that can be driven in the opposite direction of rotation or the inclined positions of the rollers of the individual machines in the sense of a train structure in the tube can deviate or deviate from each other, the pivot axis of the roller holders arranged in the two drivable frames are each arranged in a plane transverse to the axis of rotation of the frame, in each of the frames at least one roller holder supporting a roller is from the DE-A-2 020 915 is known.
  • a gauge for the pipe has educational roles.
  • the axis of rotation of a straightening frame is offset from the axes of the two adjacent straightening frames, as a result of which the axes of the gauges formed by the straightening rollers are also offset from one another. Successive straightening frames run in opposite directions.
  • the directional effect is achieved in this known straightening machine only by the deflection of the tube, which is caused by the axial displacement of one frame relative to the two adjacent frames, in particular since the teaching formed by the straightening rollers corresponds to the diameter of the tube to be straightened.
  • the frames carrying the straightening rollers are slidably arranged on a fixed, rotatable faceplate. This makes the construction of this known straightening machine very complicated.
  • the gauge formed by the straightening rollers of the housing axially offset from the other housings can be smaller than the nominal diameter of the pipe to be straightened.
  • the invention is based on the consideration that thin-walled pipes have to be plastically deformed in order to be able to be properly straightened, which can be done by pulling, pushing, bending, twisting or by a combination of these influences.
  • the invention is based on the object to straighten thin-walled pipes perfectly straight, to maintain the circular cross-section of the pipe to be straightened or to reduce the deviation from the circular ring shape and, if necessary, also to provide the outer surface of thin-walled pipes with a bare surface over the entire surface.
  • the given instruction deliberately causes such a deformation.
  • the circumferential cross-sectional deformation is used for straightening. Due to the correspondingly high rotational speed of the frame, the blunt pipe surface ensures that no bare lanes are visible because the lanes overlap.
  • the rollers arranged in the frame are positioned with respect to the axis of rotation of the frame so that they can themselves generate the feed of the pipe to be straightened and roll on the pipe surface, ie do not slide on this surface.
  • the speed of the second frame should be slightly higher than the speed of the first frame, but you can also choose the angle of attack of the rollers that are arranged in the second frame, slightly larger than the angle of attack of the rollers arranged in the first frame, so that tube to be straightened between the two frames is under slight tension.
  • roller holders each bearing a roller, opposite each other in such a way that their pivot axes lie on a straight line intersecting the axis of rotation of the corresponding frame, and the roles with the same Distance from the axis of rotation of the corresponding frame are set obliquely.
  • each roller It is also expedient to form the spherical outer surface of each roller from several sections of different curvatures, of which at least one section has a radius of curvature between 500 mm and infinity.
  • the roll holders are also designed in a manner known per se to be movable in a controlled manner in the direction of the frame rotation axis during the insertion and runout of the pipe to be straightened with rotating frames.
  • the distance between the individual machines can also be changed so that the reel seat, the reels for the reels, the reels for diameter, the angular position, etc. can be prepared outside the straightening machine so that the exchange can be accelerated, so that each one is easily accessible.
  • rollers arranged on the rapidly rotating frame center the material to be straightened in the straightening machine, it is advantageous, in particular if only one or two rollers are provided per frame, for the pipe to be straightened in the area of the frame supports in the hollow cylindrical frame there Leadership tools.
  • a thin-walled tube 1 is fed through pairs of intake rollers 2 to a frame 3 which can be driven all round and which is supported by a bearing 4 or the like via a pulley. 5 can be driven in one direction of rotation.
  • a roller holder 6 is arranged obliquely adjustable about a pivot axis 7, this pivot axis 7 lies in a plane transverse to the frame axis of rotation 8 and intersects the frame axis of rotation.
  • the roller 9, which is freely rotatably mounted in the roller holder 6, has a spherical lateral surface which is formed from several sections of different curvature.
  • roller holders 6, each supporting a roller 9, in the frame 3 so that their pivot axes 7 lie in a straight line intersecting the axis of rotation 8, the rollers 9 being set at the same distance from this axis of rotation 8. More than two rollers 9 can also be arranged in the transverse plane.
  • the second frame 10 is through a bearing 11 about the same axis of rotation 8 as the frame 3 or the like via a pulley. 12 drivable, but in the opposite direction to the direction of rotation of the frame 3. It also has at least one roll holder 14 which rotates freely around a roll 13 and which is arranged obliquely in the frame 10 about a pivot axis 15. It is more expedient to also provide two roll holders 14 in the frame 10, which can be adjusted obliquely about the same pivot axis 15.
  • Extending rollers 18 are arranged behind the second frame 10 in a manner known per se and, like the pairs of intake rollers 2, prevent the rotation of a pipe 1 to be straightened.
  • the drivable frame 10 is arranged in the direction of the frame axis of rotation 8 towards and away from the frame 3 in order to be able to replace the roller holders 6 and 14 relatively quickly, although the assignment of these roller holders 6 and 14 to the frame 3 and 10 is shown in the drawing as if the roll holder could not be removed.
  • the two frames 3 and 10 are moved towards each other contrary to the representation in the drawing.
  • guide means 20 and 21 for the material 1 to be straightened are arranged in the area of the bearings 4 and 11 of the frames 3 and 10, in which the latter are hollow-cylindrical.
  • These consist of a hollow cylindrical bush, the inside diameter of which corresponds approximately to the outside diameter of the pipes 1 to be straightened.
  • This bushing can be made of Teflon or another material that has a low coefficient of friction compared to the material of the goods.

Abstract

1. Straightening machine which consists of several individual machines which are arranged in succession in the direction of movement of a thin-walled pipe (1) and which each have a frame (3, 10) which can be driven to rotate, and through which the thin-walled pipe (1), secured against rotation (rollers 2, 18), can be guided, with rollers (9, 13) which can be adjusted transversely to the pipe (1) and can be inclined in relation to the pipe axis, in which machine the rotational speeds of the frames (3, 10) which can be driven in opposite directions of rotation, or the inclinations of the rollers (9, 13) of the individual machines differ or can differ from one another for the purpose of building up tension in the pipe (1), the pivot axes (7, 15) of the roller-holders (6, 14) located in the two drivable frames (3, 10) are each arranged in a plane lying transversely to the axis of rotation (8) of the frames (3, 10) and at least one roller-holder (6, 14) supporting a roller (9, 13) is located in each of the frames (3, 10), characterised in that only two individual machines (3, 9 and 10, 13 respectively) with a common axis of rotation are provided, in that each of the rollers (9, 13) has a crowned shell surface, and in that the rotational speeds of the frames (3, 10) are calculated in such a way that the effective polishing width is greater than the advance, per revolution, of the material to be straightened.

Description

Die Erfindung betrifft eine aus mehreren in der Bewegungsrichtung eines dünnwandigen Rohres hintereinander angeordneten Einzelmaschinen mit je einem umlaufend antreibbaren Rahmen bestehende Richtmaschine gemäss Oberbegriff des Anspruches 1.The invention relates to a straightening machine consisting of a plurality of individual machines arranged one behind the other in the direction of movement of a thin-walled tube, each with a frame that can be driven all round, according to the preamble of claim 1.

Eine solche gattungsgemässe Richtmaschine, durch die das dünnwandige Rohr gegen Verdrehen gesichert durchführbar ist und die mit quer zum Rohr einstellbaren und zur Rohrachse schräg stellbaren Rollen versehen ist, wobei die Umlaufgeschwindigkeiten der mit entgegengesetzter Drehrichtung antreibbaren Rahmen bzw. die Schrägstellungen der Rollen der Einzelmaschinen im Sinne eines Zugaufbaus im Rohr voneinander abweichen bzw. abweichen können, die Schwenkachse der in den beiden antreibbaren Rahmen angeordneten Rollenhalter je in einer quer zur Drehachse der Rahmen liegenden Ebene angeordnet sind, in jedem der Rahmen mindestens ein eine Rolle lagernder Rollenhalter angeordnet ist, ist aus der DE-A-2 020 915 bekannt.Such a generic straightening machine, by means of which the thin-walled tube can be secured against twisting and which is provided with rollers that can be adjusted transversely to the tube and that can be inclined relative to the tube axis, the rotational speeds of the frames that can be driven in the opposite direction of rotation or the inclined positions of the rollers of the individual machines in the sense of a train structure in the tube can deviate or deviate from each other, the pivot axis of the roller holders arranged in the two drivable frames are each arranged in a plane transverse to the axis of rotation of the frame, in each of the frames at least one roller holder supporting a roller is from the DE-A-2 020 915 is known.

Bei dieser bekannten Richtmaschine, mit der dünnwandige Rohre mit polierter Oberfläche oder auch Rundstäbe gerichtet werden können, sind mindestens drei in der Bewegungsrichtung hintereinander angeordnete Einzelmaschinen vorgesehen, die je aus einem Richtrahmen bestehen, der jeweils vier ein hyperbolisches Profil aufweisende, eine Lehre für das Rohr bildende Richtrollen besitzt. Die Drehachse eines Richtrahmens ist dabei gegenüber den Achsen der beiden benachbarten Richtrahmen versetzt, wodurch auch die Achsen der durch die Richtrollen gebildeten Lehren gegeneinander versetzt sind. Aufeinanderfolgende Richtrahmen laufen dabei in zueinander entgegengesetzter Richtung um. Die Richtwirkung wird bei dieser bekannten Richtmaschine nur durch die Durchbiegung des Rohres erzielt, welche durch die axiale Verschiebung des einen Rahmens gegenüber den beiden benachbarten Rahmen bewirkt wird, insbesondere, da die durch die Richtrollen gebildete Lehre dem Durchmesser des zu richtenden Rohres entspricht. Um die Richtrollen eines Rahmens gegenüber den Richtrollen der anderen Rahmen axial versetzen zu können, sind die die Richtrollen tragenden Rahmen an einer ortsfesten, drehbaren Planscheibe verschiebbar angeordnet. Dadurch wird der Aufbau dieser bekannten Richtmaschine sehr kompliziert. Um Einbeulungen geringer Tiefe an der Rohroberfläche zu beseitigen, kann die durch die Richtrollen des axial gegenüber den anderen Gehäusen versetzten Gehäuses gebildete Lehre kleiner sein, als der Nenndurchmesser des zu richtenden Rohres.In this known straightening machine, with which thin-walled pipes with a polished surface or round rods can be straightened, at least three individual machines arranged one behind the other in the direction of movement are provided, each of which consists of a straightening frame, each of which has a hyperbolic profile, a gauge for the pipe has educational roles. The axis of rotation of a straightening frame is offset from the axes of the two adjacent straightening frames, as a result of which the axes of the gauges formed by the straightening rollers are also offset from one another. Successive straightening frames run in opposite directions. The directional effect is achieved in this known straightening machine only by the deflection of the tube, which is caused by the axial displacement of one frame relative to the two adjacent frames, in particular since the teaching formed by the straightening rollers corresponds to the diameter of the tube to be straightened. In order to be able to axially offset the straightening rollers of a frame with respect to the straightening rollers of the other frames, the frames carrying the straightening rollers are slidably arranged on a fixed, rotatable faceplate. This makes the construction of this known straightening machine very complicated. In order to eliminate dents of shallow depth on the pipe surface, the gauge formed by the straightening rollers of the housing axially offset from the other housings can be smaller than the nominal diameter of the pipe to be straightened.

Die Erfindung geht von der Überlegung aus, dass dünnwandige Rohre, um einwandfrei gerichtet werden zu können, plastisch verformt werden müssen, was durch Zug, Druck, Biegung, Verdrehung oder durch eine Kombination dieser Beeinffussungen erfolgen kann.The invention is based on the consideration that thin-walled pipes have to be plastically deformed in order to be able to be properly straightened, which can be done by pulling, pushing, bending, twisting or by a combination of these influences.

Das verbreiteste Verfahren beim Richten dünnwandiger Rohre besteht darin, die plastische Verformung durch Biegung zu bewirken, wie dies auch aus der DE-A-2 020 915 hervorgeht. In diesem Fall muss jedoch die Biegebeanspruchung umlaufend wirken. Dies kann dadurch erfolgen, dass das zu richtende Rohr oder das Richtsystem umläuft.The most widespread method in straightening thin-walled pipes is to effect plastic deformation by bending, as is also apparent from DE-A-2 020 915. In this case, however, the bending stress must have an all-round effect. This can be done by rotating the pipe to be straightened or the straightening system.

Zusätzlich ist dafür zu sorgen, dass die Verformung langsam genug bis zur plastischen Verformung anschwillt und auch langsam genug wieder abschwillt. Der maximale Vorschub pro Umdrehung ist also begrenzt.In addition, it must be ensured that the deformation swells slowly enough until plastic deformation and also swells slowly enough. The maximum feed per revolution is therefore limited.

Bei der bekannten Rohrrichtmaschine mit umlaufend wirkender Biegebeanspruchung wird neben der plastischen Verformung durch Biegung auch eine plastische Verformung des Rohrquerschnittes bewirkt.In the known pipe straightening machine with circumferential bending stress, plastic deformation of the pipe cross-section is effected in addition to the plastic deformation by bending.

Der Erfindung liegt nun die Aufgabe zugrunde, dünnwandige Rohre einwandfrei gerade zu richten, den Kreisquerschnitt des zu richtenden Rohres zu erhalten bzw. die Abweichung von der Kreisringform zu verringern und gegebenenfalls darüberhinaus die Mantelfläche dünnwandiger Rohre ganzflächig mit einer blanken Oberfläche zu versehen.The invention is based on the object to straighten thin-walled pipes perfectly straight, to maintain the circular cross-section of the pipe to be straightened or to reduce the deviation from the circular ring shape and, if necessary, also to provide the outer surface of thin-walled pipes with a bare surface over the entire surface.

Diese Aufgabe wird erfindungsgemäss durch die Kennzeichenmerkmale des Anspruches 1 gelöst.According to the invention, this object is achieved by the characterizing features of claim 1.

Während man bisher Wert darauf legte, den Kreisquerschnitt der zu richtenden, dünnwandigen Rohre wenig zu verformen, wird durch die gegebene Anweisung eine solche Verformung bewusst erwirkt. Es wird abweichend von den bekannten Rohrrichtmaschinen nur die umlaufende Querschnittsverformung zum Richten benutzt. Durch die entsprechend hoch gewählte Umlaufdrehzahl der Rahmen wird bei stumpfer Rohroberfläche erreicht, dass keine blanken Laufspuren zu sehen sind, weil sich die Laufspuren überdecken. Die in dem Rahmen angeordneten Rollen sind dabei gegenüber der Rahmendrehachse so angestellt, dass sie den Vorschub des zu richtenden Rohres selbst erzeugen können und auf der Rohroberfläche abrollen, also nicht auf dieser Oberfläche gleiten. Darüberhinaus sollte die Drehzahl des zweiten Rahmens geringfügig grösser sein, als die Drehzahl des ersten Rahmens, man kann aber auch den Anstellwinkel der Rollen, die im zweiten Rahmen angeordnet sind, geringfügig grösser wählen, als den Anstellwinkel der im ersten Rahmen angeordneten Rollen, damit das zu richtende Rohr zwischen beiden Rahmen unter leichtem Zug steht.While previously it was important to deform the circular cross section of the thin-walled pipes to be straightened, the given instruction deliberately causes such a deformation. In contrast to the known pipe straightening machines, only the circumferential cross-sectional deformation is used for straightening. Due to the correspondingly high rotational speed of the frame, the blunt pipe surface ensures that no bare lanes are visible because the lanes overlap. The rollers arranged in the frame are positioned with respect to the axis of rotation of the frame so that they can themselves generate the feed of the pipe to be straightened and roll on the pipe surface, ie do not slide on this surface. In addition, the speed of the second frame should be slightly higher than the speed of the first frame, but you can also choose the angle of attack of the rollers that are arranged in the second frame, slightly larger than the angle of attack of the rollers arranged in the first frame, so that tube to be straightened between the two frames is under slight tension.

Wenngleich es an sich ausreicht, in jedem Rahmen nur eine Rolle mit balliger Mantelfläche anzuordnen, empfiehlt es sich, in jedem umlaufend antreibbaren Rahmen zwei je eine Rolle lagernde Rollenhalter so gegenüberliegend anzuordnen, dass deren Schwenkachsen auf einer die Drehachse des entsprechenden Rahmens schneidenden Geraden liegen, und die Rollen mit gleichem Abstand von der Drehachse des entsprechenden Rahmens schräg gestellt eingestellt sind. Man kann aber auch in jedem umlaufend antreibbaren Rahmen mehr als zwei je eine Rolle lagernde Rollenhalter vorsehen und ihre Schrägstellungen im wesentlichen gleich bemessen.Although it is sufficient in itself to arrange only one roller with a spherical lateral surface in each frame, it is advisable to arrange two roller holders, each bearing a roller, opposite each other in such a way that their pivot axes lie on a straight line intersecting the axis of rotation of the corresponding frame, and the roles with the same Distance from the axis of rotation of the corresponding frame are set obliquely. However, it is also possible to provide more than two roll holders, each bearing a roll, in each circumferentially drivable frame and dimension their inclinations essentially the same.

Zweckmässig ist es darüberhinaus, die ballige Mantelfläche jeder Rolle aus mehreren Abschnitten verschiedener Krümmungen zu bilden, von denen mindestens ein Abschnitt einen Krümmungsradius zwischen 500 mm und unendlich hat.It is also expedient to form the spherical outer surface of each roller from several sections of different curvatures, of which at least one section has a radius of curvature between 500 mm and infinity.

Um bei verhältnismässig hohen Richtgeschwindigkeiten keine Probleme an den Anfängen und an den Enden auftreten zu lassen, sind auch hier die Rollenhalter in an sich bekannter Weise während des Einführens und Auslaufens des zu richtenden Rohres bei umlaufenden Rahmen gesteuert in Richtung auf die Rahmendrehachse hin bewegbar ausgebildet.In order to prevent problems at the beginning and at the ends from occurring at relatively high straightening speeds, the roll holders are also designed in a manner known per se to be movable in a controlled manner in the direction of the frame rotation axis during the insertion and runout of the pipe to be straightened with rotating frames.

Damit die die Rollen lagernden Rollenhalter, die Rollen auf Durchmesser, die Winkelstellung usw. ausserhalb der Richtmaschine vorbereitet werden können, um den Austausch zu beschleunigen, ist auch hier der Abstand zwischen den Einzelmaschinen änderbar ist, sodass jede für sich gut zugänglich ist.The distance between the individual machines can also be changed so that the reel seat, the reels for the reels, the reels for diameter, the angular position, etc. can be prepared outside the straightening machine so that the exchange can be accelerated, so that each one is easily accessible.

Obgleich die an den schnellumlaufenden Rahmen angeordneten Rollen das zu richtende Gut in der Richtmaschine zentrieren, ist es vorteilhaft, insbesondere dann, wenn je Rahmen nur eine oder zwei Rollen vorgesehen sind, das zu richtende Rohr im Bereich der Rahmenträger in dem dort hohlzylinderförmig ausgebildeten Rahmen in Führungsmitteln zu führen.Although the rollers arranged on the rapidly rotating frame center the material to be straightened in the straightening machine, it is advantageous, in particular if only one or two rollers are provided per frame, for the pipe to be straightened in the area of the frame supports in the hollow cylindrical frame there Leadership tools.

Die Erfindung wird anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles nachstehend näher erläutert.The invention is explained in more detail below with reference to an exemplary embodiment schematically shown in the drawing.

Ein dünnwandiges Rohr 1 wird durch Einzugsrollenpaare 2 einem umlaufend antreibbaren Rahmen 3 zugeführt, der durch ein Lager 4 gelagert über eine Riemenscheibe od.dgl. 5 in einer Drehrichtung antreibbar ist. In dem Rahmen 3 ist mindestens ein Rollenhalter 6 um eine Schwenkachse 7 schräg einstellbar angeordnet, diese Schwenkachse 7 liegt in einer zur Rahmendrehachse 8 quer liegenden Ebene und schneidet die Rahmendrehachse. Die im Rollenhalter 6 frei drehbar gelagerte Rolle 9 weist eine ballige Mantelfläche auf, die aus mehreren Abschnitten verschiedener Krümmung gebildet ist.A thin-walled tube 1 is fed through pairs of intake rollers 2 to a frame 3 which can be driven all round and which is supported by a bearing 4 or the like via a pulley. 5 can be driven in one direction of rotation. In the frame 3, at least one roller holder 6 is arranged obliquely adjustable about a pivot axis 7, this pivot axis 7 lies in a plane transverse to the frame axis of rotation 8 and intersects the frame axis of rotation. The roller 9, which is freely rotatably mounted in the roller holder 6, has a spherical lateral surface which is formed from several sections of different curvature.

Zweckmässiger ist es jedoch, im Rahmen 3 zwei je eine Rolle 9 lagernde Rollenhalter 6 so gegenüberliegend anzuordnen, dass deren Schwenkachsen 7 in einer die Drehachse 8 schneidenden Geraden liegen, wobei die Rollen 9 mit gleichem Abstand von dieser Drehachse 8 eingestellt sind. Es können auch mehr als zwei Rollen 9 in der querliegenden Ebene angeordnet sein. Der zweite Rahmen 10 ist durch ein Lager 11 um die gleiche Drehachse 8, wie der Rahmen 3 über eine Riemenscheibe od.dgl. 12 antreibbar, jedoch in entgegengesetzter Richtung zur Drehrichtung des Rahmens 3. Auch er weist mindestens einen eine Rolle 13 frei drehbar lagernden Rollenhalter 14 auf, der um eine Schwenkachse 15 schräg einstellbar im Rahmen 10 angeordnet ist. Zweckmässiger ist es, auch im Rahmen 10 zwei Rollenhalter 14 vorzusehen, die um die gleiche Schwenkachse 15 entsprechend schräg einstellbar sind.It is more expedient, however, to arrange two roller holders 6, each supporting a roller 9, in the frame 3 so that their pivot axes 7 lie in a straight line intersecting the axis of rotation 8, the rollers 9 being set at the same distance from this axis of rotation 8. More than two rollers 9 can also be arranged in the transverse plane. The second frame 10 is through a bearing 11 about the same axis of rotation 8 as the frame 3 or the like via a pulley. 12 drivable, but in the opposite direction to the direction of rotation of the frame 3. It also has at least one roll holder 14 which rotates freely around a roll 13 and which is arranged obliquely in the frame 10 about a pivot axis 15. It is more expedient to also provide two roll holders 14 in the frame 10, which can be adjusted obliquely about the same pivot axis 15.

Während die Mittel zum Schrägstellen der Rollen bzw. der Rollenhalter nicht dargestellt sind, sind die zum radialen Verstellen der Rollenhalter vorgesehenen Mittel durch axial zur Rahmendrehachse 8 verschiebbare, mit Konusflächen 16 versehene Ringkörper 17 nur angedeutet, da solche Verstellorgane beispielsweise zum radialen Verstellen der Messer von Schälmaschinen an sich bekannt sind.While the means for tilting the rollers or the roller holder are not shown, the means provided for the radial adjustment of the roller holder are only indicated by ring bodies 17 which can be displaced axially relative to the axis of rotation 8 and are provided with conical surfaces 16, since such adjustment members for example for the radial adjustment of the knives from Peeling machines are known per se.

Hinter dem zweiten Rahmen 10 sind in an sich bekannter Weise Auszugsrollen 18 angeordnet, die wie die Einzugsrollenpaare 2 das Verdrehen eines zu richtenden Rohres 1 verhindern.Extending rollers 18 are arranged behind the second frame 10 in a manner known per se and, like the pairs of intake rollers 2, prevent the rotation of a pipe 1 to be straightened.

Wie durch den Doppelpfeil 19 angedeutet, ist der antreibbare Rahmen 10 in Richtung der Rahmendrehachse 8 auf den Rahmen 3 zu und von diesem weg verschiebbar angeordnet, um die Rollenhalter 6 und 14 verhältnismässig schnell auswechseln zu können, wenngleich die Zuordnung dieser Rollenhalter 6 und 14 zu den Rahmen 3 und 10 in der Zeichnung so dargestellt ist, als liessen sich die Rollenhalter nicht ausbauen. In Betriebsstellung sind die beiden Rahmen 3 und 10 entgegen der Darstellung in der Zeichnung aufeinanderzu bewegt.As indicated by the double arrow 19, the drivable frame 10 is arranged in the direction of the frame axis of rotation 8 towards and away from the frame 3 in order to be able to replace the roller holders 6 and 14 relatively quickly, although the assignment of these roller holders 6 and 14 to the frame 3 and 10 is shown in the drawing as if the roll holder could not be removed. In the operating position, the two frames 3 and 10 are moved towards each other contrary to the representation in the drawing.

Im Bereich der Lager 4 und 11 der Rahmen 3 und 10, in dem letztere hohlzylinderförmig ausgebildet sind, sind Führungsmittel 20 und 21 für das zu richtende Gut 1 angeordnet. Diese bestehen hier aus einer hohlzylinderförmigen Buchse, deren Innendurchmesser etwa dem Aussendurchmesser der zu richtenden Rohre 1 entspricht. Diese Buchse kann dabei aus Teflon oder einem anderen, gegenüber dem Material des Gutes einen niedrigen Reibungskoeffizienten aufweisendem Material bestehen.In the area of the bearings 4 and 11 of the frames 3 and 10, in which the latter are hollow-cylindrical, guide means 20 and 21 for the material 1 to be straightened are arranged. These consist of a hollow cylindrical bush, the inside diameter of which corresponds approximately to the outside diameter of the pipes 1 to be straightened. This bushing can be made of Teflon or another material that has a low coefficient of friction compared to the material of the goods.

Claims (5)

1. Straightening machine which consists of several individual machines which are arranged in succession in the direction of movement of a thin-walled pipe (1) and which each have a frame (3, 10) which can be driven to rotate, and through which the thin-walled pipe (1), secured against rotation (rotters 2, 18), can be guided, with rollers (9, 13) which can be adjusted transversely to the pipe (1) and can be inclined in relation to the pipe axis, in which machine the rotational speeds of the frames (3, 10) which can be driven in opposite directions of rotation, or the inclinations of the rollers. (9, 13) of the individual machines differ or can differ from one another for the purpose of building up tension in the pipe (1), the pivot axes (7, 15) of the roller-holders (6, 14) located in the two drivable frames (3, 10) are each arranged in a plane lying transversely to the axis of rotation (8) of the frames (3, 10) and at least one roller-holder (6, 14) supporting a roller (9, 13) is located in each of the frames (3, 10), characterised in that only two individual machines (3, 9 and 10, 13 respectively) with a common axis of rotation are provided, in that each of the rollers (9, 13) has a crowned shell surface, and in that the rotational speeds of the frames (3, 10) are calculated in such a way that the effective polishing width is greater than the advance, per revolution, of the material to be straightened.
2. Straightening machine according to Claim 1, characterised in that two roller-holders (6, 14), each supporting a roller (9, 13), are located opposite one another in each frame (3, 10) which can be driven to rotate, in such a way that their pivot axes (7, 15) lie on a straight line intersecting the axis of rotation (8) of the frames, and the rollers (9, 13) are set at the same distance from the axis of rotation (8) of the frames.
3. Straightening machine according to Claim 1, characterised in that more than two roller-holders (6, 14), each supporting a roller (9, 13), are provided in each frame (3, 10) which can be driven to rotate, and in that the distances between their rollers and the axis of rotation (8) of the frames and their inclinations are each essentially identical.
4. Straightening machine according to one or more of Claims 1 to 3, characterised in that the crowned shell surface of each roller (9, 13) is formed from several portions of different curvatures, at least one portion of which has a radius of curvature of between 500 mm and infinity.
5. Straightening machine according to one or more of Claims 1 to 4, characterised in that guide means (20, 21) are located respectively, in the region of the frame bearings (4, 11), in each frame (3, 10) which is made there in the form of a hollow cylinder.
EP80101302A 1979-03-19 1980-03-13 Straightening machine for thin-walled pipes Expired EP0016422B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101302T ATE4176T1 (en) 1979-03-19 1980-03-13 STRAIGHTENING MACHINE FOR THIN-WALLED PIPES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2910705 1979-03-19
DE19792910705 DE2910705A1 (en) 1979-03-19 1979-03-19 TWO SINGLE MACHINES TO BE DIRECTLY ADJUSTED IN THE MOVEMENT DIRECTION WITH A FRAME DRIVE FRAME FOR A SINGLE-WALL TUBE

Publications (2)

Publication Number Publication Date
EP0016422A1 EP0016422A1 (en) 1980-10-01
EP0016422B1 true EP0016422B1 (en) 1983-07-20

Family

ID=6065784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101302A Expired EP0016422B1 (en) 1979-03-19 1980-03-13 Straightening machine for thin-walled pipes

Country Status (3)

Country Link
EP (1) EP0016422B1 (en)
AT (1) ATE4176T1 (en)
DE (1) DE2910705A1 (en)

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CN111958357A (en) * 2020-08-04 2020-11-20 安庆锦泰金属材料科技有限公司 Quenching polishing belt oiling device

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ITBO20080634A1 (en) * 2008-10-15 2010-04-16 Schnell Spa EQUIPMENT FOR STRAIGHTENING METAL AND SIMILAR PROFILES
CN104971968B (en) * 2014-04-11 2017-04-26 浙江久而久化学有限公司 Aluminum tube color printing automatic discharging device
CN109773606B (en) * 2018-12-26 2021-06-08 芜湖恒美电热器具有限公司 Steel pipe grinding and correcting device for steel strip rolling
CN111151595B (en) * 2020-01-12 2023-11-03 浙江同诚合金铜管有限公司 Production and preparation method for copper alloy pipe straightening lubrication heat treatment blanking
CN113333508B (en) * 2021-06-02 2023-02-24 湖州远拓输送设备有限公司 Conical roller rounding machine tool

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032066B (en) * 1955-09-29 1958-06-12 Th Calow & Co Straightening machine for pipes, shafts or the like.
DE1140052B (en) * 1958-04-18 1962-11-22 Th Calow & Co Straightening machine with rotating frame or drum
DE1800297B2 (en) * 1968-10-01 1976-08-12 Wsesojusnynautschno-issledowatelskij i projektno-konstruktorsky institut metallurgitscheskowo maschinostrojenia, Moskau MACHINE FOR LEVELING PRIMARILY THIN-WALLED PIPES
DE2020915C3 (en) * 1970-04-29 1974-09-12 Wsesojusnij Nautschno-Issledowatel' Skij I Projektno-Konstruktorskij Institut Metallurgitscheskowo Maschinostrojenija, Moskau Straightening machine for pipes
DE2411880A1 (en) * 1974-03-12 1975-09-18 Lindemann Hans Rod straightening machine unit - has eccentric roller in rotating housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111958357A (en) * 2020-08-04 2020-11-20 安庆锦泰金属材料科技有限公司 Quenching polishing belt oiling device

Also Published As

Publication number Publication date
DE2910705A1 (en) 1980-10-02
ATE4176T1 (en) 1983-08-15
EP0016422A1 (en) 1980-10-01

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