EP0255590B1 - Drawing device for tubes with a cambered wall at the end - Google Patents

Drawing device for tubes with a cambered wall at the end Download PDF

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Publication number
EP0255590B1
EP0255590B1 EP87108656A EP87108656A EP0255590B1 EP 0255590 B1 EP0255590 B1 EP 0255590B1 EP 87108656 A EP87108656 A EP 87108656A EP 87108656 A EP87108656 A EP 87108656A EP 0255590 B1 EP0255590 B1 EP 0255590B1
Authority
EP
European Patent Office
Prior art keywords
rod
tube
stopper
transport
dished
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87108656A
Other languages
German (de)
French (fr)
Other versions
EP0255590A2 (en
EP0255590A3 (en
Inventor
Rudolf Bültmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87108656T priority Critical patent/ATE45519T1/en
Publication of EP0255590A2 publication Critical patent/EP0255590A2/en
Publication of EP0255590A3 publication Critical patent/EP0255590A3/en
Application granted granted Critical
Publication of EP0255590B1 publication Critical patent/EP0255590B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B21C3/16—Mandrels; Mounting or adjusting same

Definitions

  • the invention relates to a drawing device for pipes with an end-curved pipe wall in the manner according to the features of the preamble in the claim.
  • a domed, domed wall is present in particular in the case of pipes with a larger diameter.
  • the head of the nail-shaped drawbar lies against the inside of the arch, the shaft protrudes so far that the jaws of the pulling carriage can grip it.
  • the drawbar has an axial rod on the back, which is received by the stopper rod, which is designed as a tube. This guide prevents the drawing head from tilting during the return movement of the drawing bar from the drawn tube, which could result in damage to the drawing material.
  • transport rollers are attached in the area of the drawing nozzle, which, when the return transport is to take place, move transversely in such a way that they abut the axial rod.
  • the transport rollers move out of the way again, so that the stopper and stopper rod are free to receive a new pipe.
  • the known system is to be developed in such a way that a complete return transport of the drawing bar can be carried out in one operation.
  • the transport rollers can find a free section on the axial rod immediately after the end of the drawing process, because the holding tube which surrounds the rod is provided with slots for the transport rollers to pass through. Because in this case the transport rollers are not in front of but behind the pulling plug, a complete stop of the drawing bar on the pulling plug is also possible.
  • the simple measure according to the invention thus makes a significant contribution to the automatic sequence of the drawing process.
  • a drawing iron 13 with a drawing nozzle 14 and an associated drawing carriage 18 with clamping jaws 19 can be seen in the figures.
  • the tube to be drawn the so-called blank 10 with a dome-like curved tube wall 12
  • a head 16 of the drawing bar rests on the inside of the tube against the curvature 12, while a shaft 17 of the drawing bar extends through the tube opening and the nozzle and protrudes so far that the clamping jaws 19 are able to clamp the shaft 17.
  • the end of the pull plug 20 lies against the head 16.
  • the pulling plug is held by a plug rod 23, which in this case is designed as a tube and slidably receives an axial rod 22, which is part of the drawing bar 15.
  • the pulling is in progress.
  • a piece 11 of the tube is already calibrated.
  • the pulling plug 20 is pushed into the pulling nozzle.
  • the two transport rollers 24 are provided for returning the drawing bar to the position 16 ', where the drawing head rests against the pulling plug, which are each attached to brackets 26 by means of sliding devices 25.
  • the transport rollers 24 rest against the axial rod 22 for the return transport of the drawing bar, wherein slots 27 are formed for the passage in the tube 23.

Abstract

1. Drawing device for tubes having a dished tube walling at their end, characterized in that - a spike-shaped drawing rod (15) rests with its head (16) against the interior of the dished tube walling (12), whereas a shaft (17) of the drawing rod is protruding ; - the drawing rod (15) is guided by means of an axial pole (22) mounted at its rear end in a bore of the drawing stopper (20) and in the stopper rod (23) formed as a tube ; - for the back transport of the drawing rod (15) after the drawing process, there are provided in the region of the drawing nozzle (14) driving rollers (24) which by means of transverse transport can be brought into an abutment in a free section of the axial pole (22) ; characterized by the following further features : - behind the drawing stopper (20) there are provided slots (27) in the tube (23) serving as stopper rod for the passage of the driving rollers (24).

Description

Die Erfindung bezieht sich auf eine Ziehvorrichtung für Rohre mit endseitig gewölbter Rohrwand in der Art gemäß den Merkmalen des Oberbegriffs im Patentanspruch.The invention relates to a drawing device for pipes with an end-curved pipe wall in the manner according to the features of the preamble in the claim.

Eine endseitig kuppelförmig gewölbte Wand ist insbesondere bei Rohren mit größerem Durchmesser vorhanden. Der Kopf der nagelförmigen Ziehangel liegt innen an der Wölbung an, der Schaft steht so weit vor, daß die Klemmbacken des Ziehwagens ihn erfassen können. Die Ziehangel hat rückseitig eine achsiale Stange, die von der Stopfenstange, die als Rohr ausgebildet ist, aufgenommen wird. Durch diese Führung wird bei der Rückbewegung der Ziehangel aus dem gezogenen Rohr ein Verkanten des Ziehangelkopfes, was eine Beschädigung des Ziehgutes zur Folge haben könnte, vermieden.A domed, domed wall is present in particular in the case of pipes with a larger diameter. The head of the nail-shaped drawbar lies against the inside of the arch, the shaft protrudes so far that the jaws of the pulling carriage can grip it. The drawbar has an axial rod on the back, which is received by the stopper rod, which is designed as a tube. This guide prevents the drawing head from tilting during the return movement of the drawing bar from the drawn tube, which could result in damage to the drawing material.

Für den Rücktransport der Ziehangeln sind im Bereich der Ziehdüse Transportrollen angebracht, die, wenn der Rücktransport stattfinden soll, derart quer verfahren, daß sie an der achsialen Stange anliegen. Wenn der Rücktransport erfolgt ist, fahren die Transportrollen wieder aus dem Weg, so daß Stopfen und Stopfenstange frei zur Aufnahme eines neuen Rohres sind.For the return transport of the drawing bars, transport rollers are attached in the area of the drawing nozzle, which, when the return transport is to take place, move transversely in such a way that they abut the axial rod. When the return transport has taken place, the transport rollers move out of the way again, so that the stopper and stopper rod are free to receive a new pipe.

Bei einer bekannten Ziehvorrichtung dieser Art (DE-A 32 15 717) ist es erforderlich, daß nach Beendigung des Ziehvorgangs, wenn der Rücktransport der Ziehangel einsetzen soll, erst der Ziehstopfen ein Stück aus der Ziehdüse zurückfahren muß, damit die Transportrollen ein freies Stück an der achsialen Stange finden, wo sie angreifen können. Der Rücktransport findet durch Anschlagen des Ziehangelkopfes an den Transportrollen ihr Ende. Der vollständige Rücktransport der Ziehangel bis zur Anlage am Ziehstopfen ist bei dem vorgenannten Stand der Technik nicht möglich.In a known pulling device of this type (DE-A 32 15 717) it is necessary that after the end of the pulling process, if the return transport of the drawing bar is to begin, the pulling plug must first move back a little from the pulling nozzle so that the transport rollers start to move freely find the axial rod where they can attack. The return transport comes to an end by hitting the drawbar head on the transport rollers. With the aforementioned prior art, it is not possible to completely transport the drawing bar back to the drawing plug.

Daraus ergibt sich die Aufgabe der Erfindung. Die bekannte Anlage soll derart weiterentwickelt werden, daß sich in einem Arbeitsgang ein vollständiger Rücktransport der Ziehangel durchführen läßt.Hence the object of the invention. The known system is to be developed in such a way that a complete return transport of the drawing bar can be carried out in one operation.

Diese Aufgabe wird durch die Merkmale nach dem kennzeichnenden Teil des Patentanspruchs gelöstThis object is achieved by the features according to the characterizing part of the patent claim

An einer solchen Anlage können unmittelbar nach Beendigung des Ziehvorgangs die Transportrollen durch eine Querfahrt einen freien Abschnitt an der achsialen Stange finden, weil das Halterohr, welches die Stange umgibt, für den Durchgang der Transportrollen mit Schlitzen versehen ist. Weil in diesem Falle die Transportrollen nicht vor, sondern hinter dem Ziehstopfen sind, ist auch ein kompletter Anschlag der Ziehangel am Ziehstopfen möglich. Durch die einfache Maßnahme nach der Erfindung ergibt sich somit ein erheblicher Beitrag zum automatischen Ablauf des Ziehvorganges.In such a system, the transport rollers can find a free section on the axial rod immediately after the end of the drawing process, because the holding tube which surrounds the rod is provided with slots for the transport rollers to pass through. Because in this case the transport rollers are not in front of but behind the pulling plug, a complete stop of the drawing bar on the pulling plug is also possible. The simple measure according to the invention thus makes a significant contribution to the automatic sequence of the drawing process.

Im folgenden wird ein Ausführungsbeispiel der Erfindung näher beschrieben unter Bezugnahme auf die beiliegenden Zeichnungen, welche die Rohrziehanlage im Bereich der Ziehdüse im Prinzip zeigen. Im besonderen stellen dar:

  • Fig. 1 die Stellung vor dem Ziehen;
  • Fig. 2 die Stellung beim Ziehen und
  • Fig. 3 die Stellung nach dem Ziehen.
In the following an embodiment of the invention is described in more detail with reference to the accompanying drawings, which show the pipe drawing system in the region of the drawing nozzle in principle. In particular:
  • 1 shows the position before pulling;
  • Fig. 2 shows the position when pulling and
  • Fig. 3 shows the position after pulling.

Man erkennt auf den Figuren ein Zieheisen 13 mit einer Ziehdüse 14 und einen zugeordneten Ziehwagen 18 mit Klemmbacken 19. Das Rohr, das gezogen werden soll, das sogenannte Rohling 10 mit endseitig kuppelartig gewölbter Rohrwand 12, steht am Eingang der Düse. Dabei liegt ein Kopf 16 der Ziehangel innen am Rohr an der Wölbung 12 an, während ein Schaft 17 der Ziehangel sich durch die Rohröffnung und die Düse hindurch erstreckt und so weit vorsteht, daß die Klemmbacken 19 in der Lage sind den Schaft 17 festzuklemmen. Der Ziehstopfen 20 liegt mit seiner Stirnfläche am Kopf 16 an. Der Ziehstopfen wird durch eine Stopfenstange 23 gehalten, die aber in diesem Falle als Rohr ausgebildet ist und eine achsiale Stange 22 verschiebbar aufnimmt, welche einen Teil der Ziehangel 15 darstellt.A drawing iron 13 with a drawing nozzle 14 and an associated drawing carriage 18 with clamping jaws 19 can be seen in the figures. The tube to be drawn, the so-called blank 10 with a dome-like curved tube wall 12, is at the entrance to the nozzle. Here, a head 16 of the drawing bar rests on the inside of the tube against the curvature 12, while a shaft 17 of the drawing bar extends through the tube opening and the nozzle and protrudes so far that the clamping jaws 19 are able to clamp the shaft 17. The end of the pull plug 20 lies against the head 16. The pulling plug is held by a plug rod 23, which in this case is designed as a tube and slidably receives an axial rod 22, which is part of the drawing bar 15.

Nach Figur 2 ist das Ziehen im Gange. Ein Stück 11 des Rohres ist bereits kalibriert. Der Ziehstopfen 20 ist in die Ziehdüse vorgeschoben.According to Figure 2, the pulling is in progress. A piece 11 of the tube is already calibrated. The pulling plug 20 is pushed into the pulling nozzle.

In der Stellung nach Figur 3 ist der Ziehvorgang beendet. Das kalibrierte Rohr 11 ist vollkommen frei. Indessen hat die Ziehangel 15 noch ihre vorgeschobene Lage inne.In the position according to FIG. 3, the drawing process has ended. The calibrated tube 11 is completely free. Meanwhile, the drawing tile 15 still has its advanced position.

Zur Rückführung der Ziehangel in die Stellung 16', wo der Ziehangelkopf wieder am Ziehstopfen anliegt, sind die beiden Transportrollen 24 vorgesehen, die jeweils mittels Schiebeeinrichtungen 25 an Halterungen 26 angebracht sind. Die Transportrollen 24 liegen zum Rücktransport der Ziehangel an der achsialen Stange 22 an, wobei für den Durchgang im Rohr 23 Schlitze 27 gebildet sind.The two transport rollers 24 are provided for returning the drawing bar to the position 16 ', where the drawing head rests against the pulling plug, which are each attached to brackets 26 by means of sliding devices 25. The transport rollers 24 rest against the axial rod 22 for the return transport of the drawing bar, wherein slots 27 are formed for the passage in the tube 23.

Wenn die Ziehangel die Stellung 16' erreicht hat, fahren die Transportrollen 24 zurück, so daß der Ziehstopfen frei wird und dorthin gebracht werden kann, wo an einem Bereitschaftslager ein neuer Rohr-Rohling aufgebracht werden kann.When the drawing bar has reached position 16 ', the transport rollers 24 move back so that the drawing plug is free and can be brought to where a new pipe blank can be applied to a standby warehouse.

Claims (1)

  1. Drawing device for tubes having a dished tube walling at their end, characterized in that
    - a spike-shaped drawing rod (15) rests with its head (16) against the interior of the dished tube walling (12), whereas a shaft (17) of the drawing rod is protruding;
    - the drawing rod (15) is guided by means of an axial pole (22) mounted at its rear end in a bore of the drawing stopper (20) and in the stopper rod (23) formed as a tube;
    - for the back transport of the drawing rod (15) after the drawing process, there are provided in the region of the drawing nozzle (14) driving rollers (24) which by means of transverse transport can be brought into an abutment in a free section of the axial pole (22); characterized by the following further features:
    - behind the drawing stopper (20) there are provided slots (27) in the tube (23) serving as stopper rod for the passage of the driving rollers (24).
EP87108656A 1986-08-02 1987-06-16 Drawing device for tubes with a cambered wall at the end Expired EP0255590B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108656T ATE45519T1 (en) 1986-08-02 1987-06-16 PULLING DEVICE FOR PIPES WITH CURVED PIPE WALLS AT THE END.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3626235 1986-08-02
DE3626235A DE3626235C1 (en) 1986-08-02 1986-08-02 Pulling device for pipes with curved pipe wall at the end

Publications (3)

Publication Number Publication Date
EP0255590A2 EP0255590A2 (en) 1988-02-10
EP0255590A3 EP0255590A3 (en) 1988-04-20
EP0255590B1 true EP0255590B1 (en) 1989-08-16

Family

ID=6306578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108656A Expired EP0255590B1 (en) 1986-08-02 1987-06-16 Drawing device for tubes with a cambered wall at the end

Country Status (4)

Country Link
EP (1) EP0255590B1 (en)
AT (1) ATE45519T1 (en)
DE (1) DE3626235C1 (en)
ES (1) ES2010205B3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY154390A (en) 2006-12-14 2015-06-15 Cta Technology Proprietary Ltd Manufacturing method for a multi-channel copper tube, and manufacturing apparatus for the tube
DE102010022123C5 (en) * 2010-05-20 2023-03-02 Leonhard Kurz Stiftung & Co. Kg security element
CN107188394B (en) * 2017-07-25 2019-12-10 成都光明派特贵金属有限公司 Glass discharge tube drawing die set, glass discharge tube manufacturing method and glass discharge tube
CN112024624A (en) * 2020-07-22 2020-12-04 无锡科拓精密合金有限公司 Cold-drawing processing method of seamless steel pipe with high-finish inner wall

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE569686C (en) * 1927-12-22 1933-02-06 Ver Deutsche Metallwerke Ag Process for the production of pipes by drawing on a mandrel
CH394996A (en) * 1961-09-02 1965-07-15 Kieserling & Albrecht Method for drawing tubes, in particular thin-walled tubes made of non-ferrous metals, over stoppers in several successive draws and drawing bench for carrying out the process
DE1602313A1 (en) * 1967-08-09 1970-08-06 Mannesmann Meer Ag Pulling large pipes with a foreign rod
DE3215717A1 (en) * 1982-04-28 1983-11-03 Bültmann KG, 5982 Neuenrade Tube drawing device

Also Published As

Publication number Publication date
ES2010205B3 (en) 1989-11-01
ATE45519T1 (en) 1989-09-15
EP0255590A2 (en) 1988-02-10
EP0255590A3 (en) 1988-04-20
DE3626235C1 (en) 1987-11-26

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