EP1022070A2 - Mandrel, apparatus and method for the cold drawing of seamless tubes - Google Patents

Mandrel, apparatus and method for the cold drawing of seamless tubes Download PDF

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Publication number
EP1022070A2
EP1022070A2 EP00100800A EP00100800A EP1022070A2 EP 1022070 A2 EP1022070 A2 EP 1022070A2 EP 00100800 A EP00100800 A EP 00100800A EP 00100800 A EP00100800 A EP 00100800A EP 1022070 A2 EP1022070 A2 EP 1022070A2
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EP
European Patent Office
Prior art keywords
mandrel
guide
pipe
drawing die
die
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP00100800A
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German (de)
French (fr)
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EP1022070A3 (en
Inventor
Walter Dr. Wetzels
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Schumag AG
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Schumag AG
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Publication date
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Publication of EP1022070A2 publication Critical patent/EP1022070A2/en
Publication of EP1022070A3 publication Critical patent/EP1022070A3/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/12—Die holders; Rotating dies
    • B21C3/14—Die holders combined with devices for guiding the drawing material or combined with devices for cooling heating, or lubricating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/16—Mandrels; Mounting or adjusting same

Definitions

  • the invention relates to a mandrel, a device and a method for cold drawing seamless tubes.
  • the mandrel has an in Direction of drawing arranged on by a die and a reaches the support block downstream of the drawing die. By moving of the drawing die perpendicular to the pipe axis can cause eccentricities be balanced.
  • the mandrel is guided by its guidance in the Support block held coaxial to the pipe axis, while the drawing block with respect the mandrel or the tube is arranged eccentrically.
  • another drawing die may be arranged, which in Dependence on an eccentricity of the pipe with respect to the pipe axis is relocatable.
  • the eccentricity of the pipe is expressed here by wall inequalities, which are due to the production of the primary material.
  • the invention proposes one Mandrel for cold drawing seamless tubes with an opposite direction of drawing arranged mandrel guide.
  • the invention proposes one Device for cold drawing seamless pipes with a drawing die and with such a mandrel cooperating with the drawing die, at which a pipe guide the pipe starting from the drawing die leads against the direction of pull.
  • a Drawing die and a mandrel interacting with the drawing die in Dependence on the eccentricity of the pipe in its relative angle to be changed to each other.
  • the mandrel is opposed to the Pull direction arranged mandrel guide, which is located on the inner wall of the incoming pipe supports, guided.
  • the occurring and Forces to be applied can be easily mastered, since only the Angle between the incoming pipe and the drawing die can be changed got to.
  • complex facilities can be dispensed with, which the drawing die depending on its eccentricity in its Change angular position. As a result, the control behavior of the Overall arrangement can be mastered much easier.
  • the angle of the dome is adjusted by a Guiding at a point where the pipe leading the mandrel is still is not pulled.
  • the mandrel guide can be one against the direction of pull arranged guide arm.
  • This The guide arm forms a lever that provides the forces necessary for guidance reduced accordingly.
  • a System should be provided on an inner wall of the to be drawn Rohres comes to the plant.
  • the system be designed, for example, by a disk or a cylinder, the outside diameter of this system is essentially the same Corresponds to the inside diameter of the incoming pipe. It goes without saying here that a small game can also be provided.
  • a pipe guide can be provided at the level of the mandrel guide system be so that the forces necessary to guide the cathedral are immediate act on the pipe at the point where the forces from the Thorn guidance can be exerted on the tube. This way Minimize stresses occurring in the pipe.
  • One, preferably an ultrasonic sensor can be in the drawing die comprehensive, measuring device to be arranged to the eccentricity measure up.
  • the eccentricity on the one hand sufficiently precise and on the other hand on one for the pipe that was finally drawn crucial points are measured.
  • Drawing die and measuring device or measuring the eccentricity on or in the drawing die is therefore independent of the other features advantageous.
  • the change in relative angle can be caused by a torque, which results from a force acting on an opposite direction of pull lying point is applied to the mandrel. This is for example by the system described above or by the system described above Pipe routing possible. It is also possible to change the relative angle due to a torque that results from a force that applied to the mandrel at a point lying in the direction of pull becomes.
  • the eccentricity can also relatively simple means and by a manageable Regulation can be influenced.
  • a mandrel 1 acts with a Drawing die 2 together to form a tube 3 which, in the direction of flow Dome 1 and the Ziebstein 2 happened to be cold drawn.
  • the mandrel 1 comprises a guide arm 4 arranged against the direction of pull, on the a guide disk 5 is arranged at the end pointing away from the mandrel 1.
  • the disc 5 essentially has the inside diameter of the incoming pipe 3, with a slight play between disc 5 and tube 3 is provided.
  • the tube 3 is guided by a tube guide 6 embraced.
  • the pipe guide 6 rests on a holder 7 which prevents the pipe guide 6 from following a movement of the pipe 3.
  • measuring devices (not shown) are arranged, which Measure the wall thickness of the tube 3, and hence its eccentricity.
  • ultrasonic sensors 9 as measuring devices for measuring the eccentricity in corresponding Flat bottom holes are provided in the drawing die 2.
  • the ultrasonic sensors 9 are selected such that they send pulses and can receive. A pulse emitted by a sensor 9 is on Material interfaces reflected. It then follows from the runtime differences the corresponding wall thickness or eccentricity.
  • ultrasonic sensors 9 are each in provided at an angle of 90 ° to each other in the drawing die 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Abstract

The cold drawing device is used in conjunction with a mandrel (1), which has a mandrel guide with a guide arm (4) fitted against the drawing direction. The device (5) is pressed against the inner wall of the tube (3). It has a flatter (2) and a tube guide (6). The tube is guided to a point going out from the flatter against the direction of drawing.

Description

Die Erfindung betrifft einen Dorn, eine Vorrichtung und ein Verfahren zum Kaltziehen nahtloser Rohre.The invention relates to a mandrel, a device and a method for cold drawing seamless tubes.

Ein derartiger Dorn sowie eine derartige Vorrichtung werden beispielsweise in der DB 196 10 642 A1 offenbart. Ebenso offenbart diese Druckschrift ein entsprechendes Verfahren. Hierbei weist der Dorn eine in Ziehrichtung angeordnete Führung auf, die durch einen Ziehstein und einen dem Ziehstein nachgeordneten Stützstein hindurchreicht. Durch Verlagern des Ziehsteins senkrecht zur Rohrachse können Exzentrizitäten ausgeglichen werden. Hierbei wird der Dorn durch seine Führung in dem Stützstein koaxial zur Rohrachse gehalten, während der Ziehstein bezüglich des Dornes bzw. des Rohres exzentrisch angeordnet ist.Such a mandrel and such a device disclosed for example in DB 196 10 642 A1. This also reveals A corresponding procedure. The mandrel has an in Direction of drawing arranged on by a die and a reaches the support block downstream of the drawing die. By moving of the drawing die perpendicular to the pipe axis can cause eccentricities be balanced. The mandrel is guided by its guidance in the Support block held coaxial to the pipe axis, while the drawing block with respect the mandrel or the tube is arranged eccentrically.

Um die Ziehspaltgeometrie an diese Exzentrizität anzupassen, kann der Ziehstein in Abhängigkeit von dem Betrag der Exzentrizität des Ziebsteins bezüglich der Rohrachse um einen Winkel aus seiner senkrecht zur Ziehachse verlaufenden Ziehebene herausgeschwenkt werden.In order to adapt the drawing gap geometry to this eccentricity, the Drawing die depending on the amount of eccentricity of the drawing brick with respect to the pipe axis at an angle from its perpendicular to Pull plane extending pivot plane are pivoted out.

In einer weiteren Ausführungsform deiser Vorrichtung kann zwischen dem Ziehstein und dem Stützstein ein weiterer Ziehstein angeordnet sein, der in Abhängigkeit von einer Exzentrizität des Rohres bezüglich der Rohrachse verlagerbar ist.In a further embodiment of the device, between the Drawing die and the support block another drawing die may be arranged, which in Dependence on an eccentricity of the pipe with respect to the pipe axis is relocatable.

Die Exzentrizität des Rohres äußert sich hierbei durch Wandungleichheiten, die durch die Herstellung des Vormaterials bedingt sind.The eccentricity of the pipe is expressed here by wall inequalities, which are due to the production of the primary material.

Um beim Kaltziehen nahtloser Rohre die Gefahr einer Exzentrizität mit einfachen Mitteln zu reduzieren, schlägt die Erfindung einerseits einen Dorn zum Kaltziehen nahtloser Rohre mit einer entgegen der Ziehrichtung angeordneten Dornführung vor. Andererseits schlägt die Erfindung eine Vorrichtung zum Kaltziehen nahtloser Rohre mit einem Ziehstein und mit einem mit dem Ziehstein zusammenwirkenden, derartigen Dorn vor, bei welcher eine Rohrführung das Rohr an einer vom Ziehstein ausgehend entgegen der Ziehrichtung liegende Stelle führt. Darüber hinaus swird ein Verfahren zum Kaltziehen nahtloser Rohre vorgeschlagen, bei welchem ein Ziehstein und ein mit dem Ziehstein zusammenwirkender Dorn in Abhängigkeit von der Exzentrizität des Rohres in ihrem Relativwinkel zueinander verändert werden.To avoid the risk of eccentricity when cold drawing seamless pipes To reduce simple means, the invention proposes one Mandrel for cold drawing seamless tubes with an opposite direction of drawing arranged mandrel guide. On the other hand, the invention proposes one Device for cold drawing seamless pipes with a drawing die and with such a mandrel cooperating with the drawing die, at which a pipe guide the pipe starting from the drawing die leads against the direction of pull. Beyond that Process for cold drawing seamless tubes proposed, in which a Drawing die and a mandrel interacting with the drawing die in Dependence on the eccentricity of the pipe in its relative angle to be changed to each other.

Durch eine derartige Anordnung wird der Dorn durch eine entgegen der Ziehrichtung angeordnete Dornführung, die sich an der Innenwandung des einlaufende Rohres abstützt, geführt. Die hierbei auftretenden und aufzubringenden Kräfte lassen sich einfach beherrschen, da lediglich der Winkel zwischen einlaufenden Rohr und dem Ziehstein verändert werden muß. Insbesondere kann auf aufwendige Einrichtungen verzichtet werden, die den Ziehstein in Abhängigkeit von seiner Exzentrizität in seiner Winkellage verändern. Hierdurch kann auch das Regelverhalten der Gesamtanordnung wesentlich einfacher beherrscht werden.With such an arrangement, the mandrel is opposed to the Pull direction arranged mandrel guide, which is located on the inner wall of the incoming pipe supports, guided. The occurring and Forces to be applied can be easily mastered, since only the Angle between the incoming pipe and the drawing die can be changed got to. In particular, complex facilities can be dispensed with, which the drawing die depending on its eccentricity in its Change angular position. As a result, the control behavior of the Overall arrangement can be mastered much easier.

Darüber hinaus erfolgt die Winkeleinstellung des Domes durch eine Führung an einer Stelle, an welcher das den Dorn führende Rohr noch nicht gezogen ist.In addition, the angle of the dome is adjusted by a Guiding at a point where the pipe leading the mandrel is still is not pulled.

In einer konkreten Ausgestaltung des Domes kann die Dornführung einen entgegen der Ziehrichtung angeordneten Führungsarm umfassen. Dieser Führungsarm bildet einen Hebel, der die zur Führung notwendigen Kräfte entsprechend reduziert.In a concrete design of the cathedral, the mandrel guide can be one against the direction of pull arranged guide arm. This The guide arm forms a lever that provides the forces necessary for guidance reduced accordingly.

An dem vom Dorn wegweisenden Ende des Führungsarmes kann eine Anlage vorgesehen sein, die an einer Innenwandung des zu ziehenden Rohres zur Anlage kommt. In konkreter Ausgestaltung kann die Anlage beispielsweise durch eine Scheibe bzw. einen Zylinder ausgestaltet sein, wobei der Außendurchmesser dieser Anlage im Wesentlichen dem Innendurchmesser des einlaufenden Rohres entspricht. Es versteht sich hierbei, daß auch ein kleines Spiel vorgesehen sein kann.At the end of the guide arm pointing away from the mandrel, a System should be provided on an inner wall of the to be drawn Rohres comes to the plant. In a specific embodiment, the system be designed, for example, by a disk or a cylinder, the outside diameter of this system is essentially the same Corresponds to the inside diameter of the incoming pipe. It goes without saying here that a small game can also be provided.

Auf Höhe der Anlage der Dornführung kann eine Rohrführung vorgesehen sein, so daß die zur Führung des Domes notwendigen Kräfte unmittelbar an der Stelle auf das Rohr wirken, an welcher auch die Kräfte durch die Dornenführung auf das Rohr ausgeübt werden. Auf diese Weise lassen sich in dem Rohr auftretende Spannungen minimieren. A pipe guide can be provided at the level of the mandrel guide system be so that the forces necessary to guide the cathedral are immediate act on the pipe at the point where the forces from the Thorn guidance can be exerted on the tube. This way Minimize stresses occurring in the pipe.

In dem Ziehstein kann eine, vorzugsweise einen Ultraschallsensor umfassende, Meßeinrichtung angeordnet sein, um die Exzentrizität zu messen. Durch eine derartige Anordnung kann die Exzentrizität einerseits ausreichend genau und andererseits an einer für das letzlich gezogene Rohr entscheidenden Stellen gemessen werden. Eine derartige Anordnung aus Ziehstein und Meßeinrichtung bzw. ein Messen der Exzentrizität am bzw. im Ziehstein ist somit auch unabhängig von den übrigen Merkmalen vorteilhaft.One, preferably an ultrasonic sensor can be in the drawing die comprehensive, measuring device to be arranged to the eccentricity measure up. With such an arrangement, the eccentricity on the one hand sufficiently precise and on the other hand on one for the pipe that was finally drawn crucial points are measured. Such an arrangement Drawing die and measuring device or measuring the eccentricity on or in the drawing die is therefore independent of the other features advantageous.

Durch die Veränderung des Relativwinkels zwischen Ziehstein und Dorn in Abhängigkeit von der Exzentrizität des Rohres kann die Wandung des gezogenen Rohres außerordentlich genau beeinflußt werden. Insbesondere ist eine entsprechende Regelung leicht beherrschbar.By changing the relative angle between drawing die and mandrel depending on the eccentricity of the tube, the wall of the pulled tube are influenced extremely precisely. In particular a corresponding regulation is easily manageable.

Die Relativwinkeländerung kann durch ein Drehmoment bedingt werden, welches aus einer Kraft resultiert, die an einer entgegen der Ziehrichtung liegenden Stelle auf den Dorn aufgebracht wird. Dieses ist beispielsweise durch die vorbeschriebene Anlage bzw. durch die vorbeschriebene Rohrführung realisierbar. Ebenso ist es möglich, die Relativwinkeländerung durch ein Drehmoment zu bedingen, welches aus einer Kraft resultiert, die an einer in der Ziehrichtung liegenden Stelle auf den Dorn aufgebracht wird.The change in relative angle can be caused by a torque, which results from a force acting on an opposite direction of pull lying point is applied to the mandrel. This is for example by the system described above or by the system described above Pipe routing possible. It is also possible to change the relative angle due to a torque that results from a force that applied to the mandrel at a point lying in the direction of pull becomes.

Durch eine derartige Verfahrensführung kann die Exzentrizität mit verhältnismäßig einfachen Mitteln und durch eine gut beherrschbare Regelung beeinflußt werden. With such a procedure, the eccentricity can also relatively simple means and by a manageable Regulation can be influenced.

Weitere Vorteile, Ziele und Eigenschaften vorliegenden Erfindung werden anhand nachfolgender Beschreibung anliegender Zeichnung erläutert, in welcher beispielhaft zwei Vorrichtungen zum Kaltziehen nahtloser Rohre mit einem Ziehstein und mit einem mit dem Ziehstein zusammenwirkenden, erfindungsgemäßen Dorn in Schnitt schematisch dargestellt sind.Further advantages, goals and characteristics of the present invention will be explained with reference to the following description of the attached drawing, in which exemplifies two devices for cold drawing seamless tubes with a drawing die and with one interacting with the drawing die, the mandrel according to the invention are shown schematically in section.

Bei der in Figur 1 dargestellt Vorrichtung wirkt ein Dorn 1 mit einem Ziehstein 2 zusammen, um ein Rohr 3, welches im Durchlaufrichtung, den Dom 1 und den Ziebstein 2 passiert, kaltzuziehen. DerDorn 1 umfasst einen entgegen der Ziehrichtung angeordneten Führungsarm 4, an dessen vom Dorn 1 wegweisenden Ende eine Führungsscheibe 5 angeordnet ist. Die Scheibe 5 weist im Wesentlichen den Innendurchmesser des einlaufenden Rohres 3 auf, wobei ein geringes Spiel zwischen Scheibe 5 und Rohr 3 vorgesehen ist.In the device shown in Figure 1, a mandrel 1 acts with a Drawing die 2 together to form a tube 3 which, in the direction of flow Dome 1 and the Ziebstein 2 happened to be cold drawn. The mandrel 1 comprises a guide arm 4 arranged against the direction of pull, on the a guide disk 5 is arranged at the end pointing away from the mandrel 1. The disc 5 essentially has the inside diameter of the incoming pipe 3, with a slight play between disc 5 and tube 3 is provided.

Auf Höhe der Scheibe 5 wird das Rohr 3 von einer Rohrführung 6 umgriffen. Die Rohrführung 6 liegt an einer Halterung 7 an, die verhindert, daß die Rohrführung 6 einer Bewegung des Rohres 3 folgt.At the level of the disc 5, the tube 3 is guided by a tube guide 6 embraced. The pipe guide 6 rests on a holder 7 which prevents the pipe guide 6 from following a movement of the pipe 3.

Vor dem Ziehstein 2 sind Meßgeräte (nicht dargestellt) angeordnet, die die Wandstärke des Rohres 3, mithin dessen Exzentrizität, messen.In front of the drawing die 2 measuring devices (not shown) are arranged, which Measure the wall thickness of the tube 3, and hence its eccentricity.

In Abhängigkeit von dieser Exzentrizität wird die Winkellage des Ziehsteins bezüglich der Rohrachse 8 (gestrichelt dargestellt) variiert. Auf diese Weise kann der Relativwinkel zwischen dorn und Ziehstein in Abhängigkeit von der Exzentrizität verändert werden. Depending on this eccentricity, the angular position of the Drawing die with respect to the tube axis 8 (shown in dashed lines) varies. On this way the relative angle between mandrel and drawing die in Depending on the eccentricity can be changed.

Gleiches ist auch daurch möglich, daß die relative Lage des Ziehsteins 2 und der Rohrführung 6 in Bezug auf die Rohrachse 8 in Abhängigkeit von der Exzentrizität des Rohres 3 verändert wird. Hierzu brauchen lediglich die Rohrführung 6 und/oder der Ziehstein 2 senkrecht zur Rohrachse 8 verlagert zu werden. Durch diese Verlagerung wird ebenfalls der Relativwinkel zwischen Ziehstein 2 und Dorn 1 verändert.The same is also possible in that the relative position of the drawing block 2 and the pipe guide 6 with respect to the pipe axis 8 depending on the eccentricity of the tube 3 is changed. All you need is this the pipe guide 6 and / or the drawing die 2 perpendicular to the pipe axis 8 to be relocated. This relocation also means that Relative angle between die 2 and mandrel 1 changed.

Es versteht sich, daß die letztgenannte Verlagerung auch kummulativ zu einer Winkelveränderung des Ziehsteines 2 Anwendung finden kann.It is understood that the latter shift is also cumulative an angle change of the die 2 can be used.

Bei der in Figur 2 dargestellten Ausführungsform sind Ultraschallsensoren 9 als Meßgeräte zum Messen der Exzentrizität in entsprechenden Bohrungen mit flachem Boden in dem Ziehstein 2 vorgesehen. Hierbei sind die Ultraschallsensoren 9 derart gewählt, daß diese Impulse ssenden und empfangen können. Ein von einem Sensor 9 ausgestrahlter Impuls wird an Materialgrenzflächen reflektiert. Aus dem Laufzeitunterschieden folgt dann die entsprechende Wandstärke bzw. Exzentrizität.In the embodiment shown in Figure 2 are ultrasonic sensors 9 as measuring devices for measuring the eccentricity in corresponding Flat bottom holes are provided in the drawing die 2. Here are the ultrasonic sensors 9 are selected such that they send pulses and can receive. A pulse emitted by a sensor 9 is on Material interfaces reflected. It then follows from the runtime differences the corresponding wall thickness or eccentricity.

Bei dieser Ausführungsform sind vier Ultraschallsensoren 9 jeweils in einem Winkel von 90° zueinander in dem Ziehstein 2 vorgesehen.In this embodiment, four ultrasonic sensors 9 are each in provided at an angle of 90 ° to each other in the drawing die 2.

Wie aus den Figuren ersichtlich, wird die Relativwinkeländerung zwischen Dorn 1 und Ziehstein 2 und durch ein Drehmoment bedingt, welches von einer Kraft, die auf die Scheibe 5 wirkt, aufgebracht wird.As can be seen from the figures, the change in relative angle between Mandrel 1 and drawing die 2 and due to a torque which of a force acting on the disc 5 is applied.

Claims (10)

Dorn zum Kaltziehen nahtloser Rohre, gekennzeichnet durch eine entgegen der Ziehrichtung angeordnete Dornführung.Mandrel for cold drawing seamless tubes, characterized by a mandrel guide arranged opposite to the direction of drawing. Dom nach Anspruch 1, dadurch gekennzeichnet, daß die Dornführung einen entgegen der Ziehrichtung angeordneten Führungsarm (4) des Dorns (1) umfasst.Dome according to claim 1, characterized in that the mandrel guide comprises a guide arm (4) of the mandrel (1) which is arranged counter to the pulling direction. Dorn nach Anspruch 2, dadurch gekennzeichnet, daß am von dem Dorn (1) wegweisenden Ende des Führungsarmes (4) eine Anlage (5) vorgesehen ist, die an einer Innenwandung eines zu ziehenden Rohres (3) zur Anlage kommt.Mandrel according to claim 2, characterized in that at the end of the guide arm (4) pointing away from the mandrel (1) a system (5) is provided which comes to rest on an inner wall of a pipe (3) to be drawn. Vorrichtung zum Kaltziehen nahtloser Rohre mit einem Ziehstein und mit einem mit dem Ziehstein zusammenwirkenden Dorn nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Rohrführung (6), die das Rohr (3) an einer vom Ziehstein (2) ausgehend entgegen der Ziehrichtung liegenden Stelle führt.Device for cold drawing seamless pipes with a drawing die and with a mandrel which interacts with the drawing die according to one of the preceding claims, characterized by a pipe guide (6) which guides the pipe (3) at a point opposite the drawing direction starting from the drawing die (2) . Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Rohrführung (6) auf Höhe einer Anlage (5) der Dornführung vorgesehen ist. Apparatus according to claim 4, characterized in that the pipe guide (6) is provided at the level of a system (5) of the mandrel guide. Vorrichtung anch Anspruch 4 oder 5, dadurch gekennzeichnet, daß in dem Ziehstein (2) eine Meßeinrichtung (9) zum Messen der Exzentrizität des Rohres (3) angeordnet ist.Device according to claim 4 or 5, characterized in that a measuring device (9) for measuring the eccentricity of the tube (3) is arranged in the drawing die (2). Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Meßeinrichtung (9) einen Ultraschallsensor umfasst.Apparatus according to claim 6, characterized in that the measuring device (9) comprises an ultrasonic sensor. Verfahren zum Kaltziehen nahtloser Rohre, dadurch gekennzeichnet, daß ein Ziehstein (2) und ein mit dem Zeihstein (2) zusammenwirkender Dorn (1) in Abhängigkeit von der Exzentrizität des Rohres (3) in ihrem Relativwinkel zueinander verändert werden.Method for cold drawing seamless tubes, characterized in that a drawing die (2) and a mandrel (1) which interacts with the die brick (2) are changed in their relative angles to one another depending on the eccentricity of the tube (3). Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Relativwinkeländerung durch ein Drehmoment bedingt ist, welches aus einer Kraft resultiert, die an einer entgegen der Ziehrichtung liegenden Stelle auf den Dorn aufgebracht wird.A method according to claim 8, characterized in that the change in relative angle is caused by a torque which results from a force which is applied to the mandrel at a point lying opposite to the direction of drawing. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Relativwinkeländerung durch ein Drehmoment bedingt ist, welches aus einer Kraft resultiert, die an einer in der Ziehrichtung liegenden Stelle auf den Dorn aufgebracht wird.Method according to Claim 8, characterized in that the change in relative angle is caused by a torque which results from a force which is applied to the mandrel at a point lying in the direction of drawing.
EP00100800A 1999-01-22 2000-01-17 Mandrel, apparatus and method for the cold drawing of seamless tubes Withdrawn EP1022070A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999102501 DE19902501A1 (en) 1999-01-22 1999-01-22 Mandrel, device and method for cold drawing seamless tubes
DE19902501 1999-01-22

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EP1022070A2 true EP1022070A2 (en) 2000-07-26
EP1022070A3 EP1022070A3 (en) 2002-01-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10218586B4 (en) * 2002-04-26 2006-03-30 Diatronic GmbH Gesellschaft für Diamant- und Hochtemperatur-Elektronik Drawing tool with electrical and micromechanical functional elements and method for producing a workpiece using this drawing tool
DE102009039873A1 (en) 2008-09-14 2010-04-08 Sms Schumag Gmbh & Co. Kg Degree of drawing machine and method of drawing a workpiece by a drawing ring
US10328473B2 (en) * 2013-11-20 2019-06-25 Danieli & C. Officine Meccaniche S.P.A. Drawing machine for drawing tubes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006008237A1 (en) * 2006-02-22 2007-08-23 Volkswagen Ag Device for deforming a strip-like workpiece comprises a deforming tool with a die and stamp which pivot about a rotary axle arranged parallel to a drawing direction to change the cross-sectional geometry of a drawing gap
DE102020108425A1 (en) 2020-03-26 2021-09-30 Sms Group Gmbh Drawing machine, drawing process and mandrel
DE102020121444A1 (en) 2020-08-14 2022-02-17 BL-Chemie GmbH & Co. Kommanditgesellschaft Pulling device for pulling tubes with a die to reduce the tube diameter and change the eccentricity of the tube

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3131803A (en) * 1961-12-04 1964-05-05 Babcock & Wilcox Co Method of and apparatus for cold drawing metal tubes
US3167176A (en) * 1961-12-04 1965-01-26 Babcock & Wilcox Co Method of and apparatus for correcting tube eccentricity
DE1959676A1 (en) * 1969-11-28 1971-06-03 Wieland Werke Ag Device for the production of approximately equal-walled tubes
GB2158755A (en) * 1984-05-02 1985-11-20 Nat Res Dev Improvements in or relating to plug drawing
DE19610642A1 (en) * 1996-03-07 1997-09-11 Mannesmann Ag Method and equipment for cold drawing seamless tubes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943044C (en) * 1953-06-10 1956-05-09 Siemens Ag Device for drawing pipes made of drawable and rollable non-ferrous metals, preferably aluminum, over a flying mandrel arranged inside the pipe
US3709020A (en) * 1970-05-14 1973-01-09 Babcock & Wilcox Co Method of and apparatus for producing a straight bore cold drawn tube
DE2362820A1 (en) * 1973-12-18 1975-07-10 Wallram Hartmetall Gmbh Tool set for precision pipe-drawing - has reducer part and finisher part connected to mandrel head part on both sides

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3131803A (en) * 1961-12-04 1964-05-05 Babcock & Wilcox Co Method of and apparatus for cold drawing metal tubes
US3167176A (en) * 1961-12-04 1965-01-26 Babcock & Wilcox Co Method of and apparatus for correcting tube eccentricity
DE1959676A1 (en) * 1969-11-28 1971-06-03 Wieland Werke Ag Device for the production of approximately equal-walled tubes
GB2158755A (en) * 1984-05-02 1985-11-20 Nat Res Dev Improvements in or relating to plug drawing
DE19610642A1 (en) * 1996-03-07 1997-09-11 Mannesmann Ag Method and equipment for cold drawing seamless tubes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BENSON : "praktische und theoretische gesichtspunkte bei der gestaltung fliegender ziehdorne" ZEITSCHRIFT F]R METALLKUNDE, Bd. 57, Nr. 10, Oktober 1966 (1966-10), Seiten 717-724, XP002174468 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10218586B4 (en) * 2002-04-26 2006-03-30 Diatronic GmbH Gesellschaft für Diamant- und Hochtemperatur-Elektronik Drawing tool with electrical and micromechanical functional elements and method for producing a workpiece using this drawing tool
DE102009039873A1 (en) 2008-09-14 2010-04-08 Sms Schumag Gmbh & Co. Kg Degree of drawing machine and method of drawing a workpiece by a drawing ring
US8627703B2 (en) 2008-09-14 2014-01-14 Sms Meer Gmbh Linear drawing machine and method for linear drawing of a workpiece through a drawing ring
US9079232B2 (en) 2008-09-14 2015-07-14 Sms Meer Gmbh Linear drawing machine and method for linear drawing of a workpiece through a drawing ring
DE102009061264B3 (en) * 2008-09-14 2016-05-04 Sms Group Gmbh Degree of drawing machine and method of drawing a workpiece by a drawing ring
US10328473B2 (en) * 2013-11-20 2019-06-25 Danieli & C. Officine Meccaniche S.P.A. Drawing machine for drawing tubes
US11097325B2 (en) 2013-11-20 2021-08-24 Danieli & C. Officine Meccaniche S.P.A. Drawing machine for drawing tubes

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