EP0079295A1 - Method of and device for manufacturing tubes in a cold rolling mill - Google Patents

Method of and device for manufacturing tubes in a cold rolling mill Download PDF

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Publication number
EP0079295A1
EP0079295A1 EP82730131A EP82730131A EP0079295A1 EP 0079295 A1 EP0079295 A1 EP 0079295A1 EP 82730131 A EP82730131 A EP 82730131A EP 82730131 A EP82730131 A EP 82730131A EP 0079295 A1 EP0079295 A1 EP 0079295A1
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EP
European Patent Office
Prior art keywords
feed
billet
mandrel
rolling mill
length
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Granted
Application number
EP82730131A
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German (de)
French (fr)
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EP0079295B1 (en
Inventor
Klaus Rehag
Josef Gerretz
Fritz Dr. Ing. Zeunert
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Vodafone GmbH
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Mannesmann AG
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Priority to AT82730131T priority Critical patent/ATE15979T1/en
Publication of EP0079295A1 publication Critical patent/EP0079295A1/en
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Publication of EP0079295B1 publication Critical patent/EP0079295B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/04—Pilgrim-step feeding mechanisms

Definitions

  • the present invention relates to a method and an apparatus for carrying out the method for producing pipes in a discontinuously operated cold pilger rolling mill, in which the billet is stretched over a fixed mandrel by means of caliber rolls rolling down and down on the billet, while the billet is gripped by a feed slide and is moved by means of feed spindles in the rolling direction and that on the inlet side has a rotatable mandrel abutment, in which the mandrel rod can be clamped and which can be opened with the slug for loading the rolling mill.
  • Cold rolling mills of the type described, in which the slug is inserted from the inlet side through the open mandrel abutment, are also referred to as so-called rear loaders. Since such rolling mills only have a mandrel abutment and a feed slide, which pushes the rolling material forward by an adjustable certain amount over, usually two feed spindles, the maximum length of the slugs to be used is just as long as the entire feed slide path. This means that the feed spindles or their thread range is also as long as the maximum length of the cap.
  • the maximum roll length to be rolled is predetermined by the fact that the effective length of the feed spindle is limited to approximately 15 m for manufacturing reasons.
  • the mentioned slab length was also set to about 15 m, which also resulted in the limitation of the known cold rolling mills to a certain maximum slug weight. This was disadvantageous because different pipe manufacturers, in particular copper pipe manufacturers, demanded larger weights, which made it necessary to use much larger weights, but was previously not achievable with the cold pilger rolling mills described.
  • the present invention is based on the object, while maintaining the construction elements used in cold pilger rolling mills of the type described at the beginning, to make these rolling mills usable for bobbin lengths which are greater than the effective maximum feed spindle length.
  • the feed carriage grips the slide several times and transports it several times over part of its length, the feed slide being released from the slide after each transport path and moved back into its starting position.
  • a device for carrying out the method is preferably characterized in that the feed carriage - as is known in continuously operated cold pilger rolling mills - is provided with a chuck which grips the tube blank on its circumference, and in that the mandrel abutment is arranged at a distance from the rear feed spindle end which is several times corresponds to the maximum feed slide travel.
  • the mandrel abutment is arranged at a distance from the rear feed spindle end which is several times corresponds to the maximum feed slide travel.
  • the feed carriage can be moved back to grasp the bobbin when the new bobbin is pushed into the rolling mill, namely when the rolling mill is shut down or during the running whale.
  • the present invention can meet the desire for extremely large bob weights with simple design means.
  • the loading time and feed carriage return time, calculated as a percentage of the rolling time of the billet, is more favorable than in the known rolling mills of this type, which could not exceed a maximum batch length of 15 meters.
  • 1 denotes the roll stand of a cold pilger rolling mill, which is driven in a conventional manner via thrust crank drives with mass balancing 2.
  • a feed slide 4 is provided, which grips the tube blank 3 at its rear end and advances in the direction of arrow 5 into the rolling mill 1.
  • the feed carriage 4 is driven by spindles 6, which are given their rotary movement via the gear housing 7.
  • the mandrel abutment is designated in which the mandrel rod is held at the end remote from the rolling mill.
  • the mandrel abutment 8 can be opened sq so that a new hole can be inserted through the mandrel abutment 8.
  • the section length to be used in the conventional cold pilger rolling mill shown in the exemplary embodiment results from the feed path of the feed carriage 4, which is determined by the length of the feed spindles 6. Since the length of the feed spindles 6 is limited to approximately 15 meters for manufacturing reasons, this also corresponds to the feed path the feed carriage 4 between the gear box 7 and the roll stand 1.
  • the cold rolling mill according to the invention is shown in FIG. 2, the same parts being labeled identically. It can be seen as different from the prior art in FIG. 1 that, in the cold rolling mill according to the invention, the mandrel abutment 8 is displaced to the inlet side by a considerable amount. Nevertheless, the displacement of the feed carriage 4, which is determined by the length of the feed spindle 6, remains the same length, but considerably longer mandrel bars, one of which is indicated at 9, can be used.
  • the length of the feed spindle is no longer a criterion for the slug length; the latter can be at least as long as the distance between the entry point into the rolling mill 1 and the mandrel abutment 8.
  • the bevel bed designated 10 between the rear feed gear 7 and the mandrel abutment 8 has fixed bevel and mandrel rod guides 11 and is very simple in its design. It can be seen in FIG. 2 that, in addition to the slag bed 10, the same construction elements are used that are also present in the prior art. Considerable increases in production can be achieved with little effort by the proposal of the invention in that the feed carriage 4 grasps the same die 3 several times and continues by a certain feed path in the direction of the arrow 5.
  • the hole 3 is inserted in the usual way through the opened rear mandrel abutment 8, whereby its length can be considerably greater than in the prior art, which is shown in FIG.

Abstract

1. Method for the production of pipes in a discontinuously operated cold pilger rolling mill (1), in which the billet (3) is drawn over a fixed mandrel rod (9) by means of grooved rolls rolling back and forth down on the billet (3), whilst the billet (3) is held by a feed slide (4) and is conveyed in the rolling direction by means of feed screws (6), and which has a rotatable mandrel support (8) on the run-in side, in which the mandrel rod (8) can be firmly clamped, and which can be opened to introduce the billet (3) into the cold pilger rolling mill (1), characterized in that for the rolling of billets (3) the length of which is greater than the effective length of the feed screws (6), the mandrel support (8) is moved toward the input side of the cold pilger rolling mill (1) by a multiple of this effective length of the feed screws (6) and that the feed slide (4) takes hold of the billet (3) and releases it respectively several times and repeatedly transports it further over a part of its length, the feed slide (4) being detached from the billet (3) after each conveying passage and returned to its initial position.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Durchführung des Verfahrens zum Herstellen von Rohren in einem diskontinuierlich betriebenen Kaltpilgerwalzwerk, bei dem die Luppe über einen festen Dorn mittels auf der Luppe hin- und herabwälzender Kaliberwalzen gestreckt wird, während die Luppe von einem Vorschubschlitten ergriffen und mittels Vorschubspindeln in Walzrichtung verfahren wird und daß einlaufseitig ein drehbares Dornwiderlager aufweist, in dem die Dornstange festklemmbar ist und das zum Laden des Walzwerkes mit der Luppe geöffnet werden kann.The present invention relates to a method and an apparatus for carrying out the method for producing pipes in a discontinuously operated cold pilger rolling mill, in which the billet is stretched over a fixed mandrel by means of caliber rolls rolling down and down on the billet, while the billet is gripped by a feed slide and is moved by means of feed spindles in the rolling direction and that on the inlet side has a rotatable mandrel abutment, in which the mandrel rod can be clamped and which can be opened with the slug for loading the rolling mill.

Kaltwalzwerke der beschriebenen Art, bei denen die Luppe von der Einlaufseite aus durch das geöffnete Dornwiderlager hindurch eingesetzt wird, werden auch als sogenannte Hinterlader bezeichnet. Da derartige Walzwerke nur ein Dornwiderlager und einen Vorschubschlitten aufweisen, der in bestimmten Abständen über, in der Regel zwei Vorschubspindeln das Walzmaterial um einen einstellbaren bestimmten Betrag vorwärtsschiebt, ist die maximale Länge der einzusetzenden Luppen genauso groß wie der gesamte Vorschubschlittenweg. Das bedeutet, daß die Vorschubspindeln bzw. deren Gewindebe-reich ebenfalls so lang wie die maximale Luppenlänge ist.Cold rolling mills of the type described, in which the slug is inserted from the inlet side through the open mandrel abutment, are also referred to as so-called rear loaders. Since such rolling mills only have a mandrel abutment and a feed slide, which pushes the rolling material forward by an adjustable certain amount over, usually two feed spindles, the maximum length of the slugs to be used is just as long as the entire feed slide path. This means that the feed spindles or their thread range is also as long as the maximum length of the cap.

Bei den bekannten Kaltwalzwerken ist die maximal zu verwalzende Luppenlänge dadurch vorgegeben, daß aus Fertigungsgründen die wirksame Länge der Vorschubspindel auf ca. 15 m begrenzt ist. Damit war die genannte einzusetzende Luppenlänge ebenfalls auf ca. 15 m festgelegt, woraus sich auch die Beschränkung der bekannten Kaltwalzwerke ein bestimmtes maximales Luppengewicht ergab. Das war nachteilig, weil von verschiedenen Rohrherstellern, insbesondere Kupferrohrherstellern größere Luppengewichte verlangt wurden, - was den Einsatz wesentlich größerer Luppen erforderlich machte, mit den beschriebenen Kaltpilgerwalzwerken jedoch bisher nicht erzielbar war.In the known cold rolling mills the maximum roll length to be rolled is predetermined by the fact that the effective length of the feed spindle is limited to approximately 15 m for manufacturing reasons. Thus, the mentioned slab length was also set to about 15 m, which also resulted in the limitation of the known cold rolling mills to a certain maximum slug weight. This was disadvantageous because different pipe manufacturers, in particular copper pipe manufacturers, demanded larger weights, which made it necessary to use much larger weights, but was previously not achievable with the cold pilger rolling mills described.

Der vorliegenden Erfindung liegt, davon ausgehend die Aufgabe zugrunde, unter Beibehaltung der bei Kaltpilgerwalzwerken der eingangs beschriebenen Art verwendeten Konstruktionselemente diese Walzwerke einsetzbar für Luppenlängen zu machen, die größer sind als die wirksame maximale Vorschubspindellänge.The present invention is based on the object, while maintaining the construction elements used in cold pilger rolling mills of the type described at the beginning, to make these rolling mills usable for bobbin lengths which are greater than the effective maximum feed spindle length.

Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, daß der Vorschubschlitten die Luppe mehrfach ergreift und mehrmals über einen Teil ihrer Lange weitertransportiert, wobei der Vorschubschlitten nach jedem Transportweg von der Luppe gelöst und in seine Ausgangsstellung zurückbewegt wird. Dieser Vorschlag macht es möglich, extrem lange Luppen in mehreren Stufen auszuwalzen, weil die Luppe mehrfach ergriffen wird und' somit die Spindellänge nicht mehr ein Kriterium für die Luppenlänge ist.To achieve the object, it is proposed according to the invention that the feed carriage grips the slide several times and transports it several times over part of its length, the feed slide being released from the slide after each transport path and moved back into its starting position. This proposal makes it possible auszuwalzen extremely long blooms in several stages because the billet is taken several times and 'thus the spindle length is no longer a criterion for shell length.

Vorzugsweise ist eine Vorrichtung zur Durchführung des Verfahrens dadurch gekennzeichnet, daß der Vorschubschlitten - wie bei kontinuierlich betriebenen Kaltpilgerwalzwerken bekannt - mit einem die Rohrluppe an ihrem Umfang ergreifenden Spannfutter versehen ist und daß das Dornwiderlager in einem Abstand von rückwärtigen Vorschubspindelende entfernt angeordnet ist, der einem mehrfachen des maximalen Vorschubschlittenweges entspricht. Durch das Ergreifen der Rohrluppe an ihrem Umfang kann diese durch beliebig häufiges Umgreifen erfaßt und somit theoretisch beliebig lang ausgebildet sein. Je nach Abstand des Dornwiderlagers vom rückwärtigen Vorschubspindelende können durch den Vorschlag der Erfindung Luppen von 25 bis 30 Metern ohne weiteres in das Walzwerk einge-schoben werden.A device for carrying out the method is preferably characterized in that the feed carriage - as is known in continuously operated cold pilger rolling mills - is provided with a chuck which grips the tube blank on its circumference, and in that the mandrel abutment is arranged at a distance from the rear feed spindle end which is several times corresponds to the maximum feed slide travel. By gripping the tube blank at its circumference, it can be gripped by reaching around as often as desired and thus theoretically can be of any length. Depending on the distance of the mandrel abutment from the rear end of the feed spindle, the proposal of the invention allows loops of 25 to 30 meters to be easily inserted into the rolling mill.

Die Zurückbewegung des Vorschubschlittens zum Nachgreifen der Luppe kann jeweils dann erfolgen, wenn die neue Luppe in das Walzwerk eingeschoben wird, und zwar bei stillgesetztem Walzwerk bzw. auch während des laufenden Wal zwerks.The feed carriage can be moved back to grasp the bobbin when the new bobbin is pushed into the rolling mill, namely when the rolling mill is shut down or during the running whale.

Die vorliegende Erfindung kann den Wunsch nach extrem großen Luppengewichten mit einfachen konstruktiven Mitteln erfüllen. Die Ladezeit und Vorschubschlittenrückfahrzeit, gerechnet in Prozenten von der Walzzeit der Luppe ist günstiger als bei den bekannten Walzwerken dieser Art,die maximale Luppenlängen von 15 Metern nicht überschreiten konnten.The present invention can meet the desire for extremely large bob weights with simple design means. The loading time and feed carriage return time, calculated as a percentage of the rolling time of the billet, is more favorable than in the known rolling mills of this type, which could not exceed a maximum batch length of 15 meters.

Schließlich ist vorgesehen, daß zwischen dem rückwärtigen Vorschubgetriebe und dem Dornwiderlager ein Luppenbett mit ortsfesten Luppen- und Dornstangenführungen vorgesehen ist, ein Bauteil, der sich durch sehr einfache Ausführung auszeichnet. Insgesamt wird durch geringfügige Änderung des Walzwerkes und die Beibehaltung herkömmlicher Konstruktionselemente ein überraschend großer Vorteil erzielen, mit dem außerdem erhebliche Produktionssteigerungen möglich sind.Finally, it is envisaged that between the rear feed gear and the mandrel abutment a coulter bed with stationary coulter and mandrel rod guides is provided, a component which is characterized by a very simple design. Overall, a minor change in the rolling mill and the retention of conventional construction elements will achieve a surprisingly great advantage, which will also enable considerable increases in production.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und nachfolgend beschrieben. Es zeigt:

  • Fig. 1 ein Kaltwalzwerk nach dem Stand der Technik und
  • Fig. 2 das erfindungsgemäße Kaltwalzwerk in Seitenansicht.
An embodiment of the invention is shown in the drawing and described below. It shows:
  • Fig. 1 is a cold rolling mill according to the prior art and
  • Fig. 2 shows the cold rolling mill according to the invention in side view.

In Figur 1 ist mit 1 das Walzgerüst eines Kaltpilgerwalzwerkes bezeichnet, das in herkömmlicher Weise über Schubkurbeltriebe mit Massenausgleich 2 angetrieben ist. Zum Vorschub der zu walzenden Rohrluppe 3 ist ein Vorschubschlitten 4 vorgesehen, der die Rohrluppe 3 an ihrem hinteren Ende ergreift und in Pfeil richtung 5 in das Walzwerk 1 vorschiebt. Der Vorschubschlitten 4 wird über Spindeln 6 angetrieben, die ihre Drehbewegung über das Getriebegehäuse 7 erteilt bekommen.In FIG. 1, 1 denotes the roll stand of a cold pilger rolling mill, which is driven in a conventional manner via thrust crank drives with mass balancing 2. To feed the tube blank 3 to be rolled, a feed slide 4 is provided, which grips the tube blank 3 at its rear end and advances in the direction of arrow 5 into the rolling mill 1. The feed carriage 4 is driven by spindles 6, which are given their rotary movement via the gear housing 7.

Mit 8 ist das Dornwiderlager bezeichnet, in dem die Dornstange am walzwerkfernen Ende gehalten wird. Das Dornwiderlager 8 läßt sich sq öffnen, daß eine neue Luppe durch das Dornwiderlager 8 hindurch eingesetzt werden kann. Die in dem im Ausführungsbeispiel dargestellten herkömmlichen Kaltpilgerwalzwerk einzusetzende Luppenlänge ergibt sich aus dem Vorschubweg des Vorschubschlittens 4, der bestimmt ist durch die Länge der Vorschubspindeln 6. Da die Länge der Vorschubspindeln 6 aus Fertigungsgründen auf ca. 15 Meter begrenzt ist, entspricht dies auch dem Vorschubweg des Vorschubschlittens 4 zwischen dem Getriebekasten 7 und dem Walzgerüst 1.With 8 the mandrel abutment is designated in which the mandrel rod is held at the end remote from the rolling mill. The mandrel abutment 8 can be opened sq so that a new hole can be inserted through the mandrel abutment 8. The section length to be used in the conventional cold pilger rolling mill shown in the exemplary embodiment results from the feed path of the feed carriage 4, which is determined by the length of the feed spindles 6. Since the length of the feed spindles 6 is limited to approximately 15 meters for manufacturing reasons, this also corresponds to the feed path the feed carriage 4 between the gear box 7 and the roll stand 1.

In Fig. 2 ist das erfindungsgemäße Kaltwalzwerk dargestellt, wobei gleiche Teile gleich bezeichnet sind. Als unterschiedlich gegenüber dem Stand der Technik in Fig. 1 ist zu erkennen, daß beim dem erfindungsgemäßen Kaltwalzwerk das Dornwiderlager 8 um einen erheblichen Betrag zur Einlaufseite hin verschoben ist. Trotzdem bleibt der durch die Länge der Vorschubspindel 6 festgelegte Verschiebeweg des Vorschubschlittens 4 in gleicher Länge bestehen, es lassen sich jedoch wesentlich längere Dornstangen, von denen eine bei 9 angedeutet ist, einsetzen. Dadurch, daß der Vorschubschlitten 4 in der Lage ist, die Luppe mehrfach zu ergreifen und vorzuschieben, ist die Länge der Vorschubspindel nicht mehr Kriterium für die Luppenlänge; letztere kann mindestens so lang sein, wie der Abstand zwischen dem Einlaufpunkt in das Walzwerk 1 und dem Dornwiderlager 8.The cold rolling mill according to the invention is shown in FIG. 2, the same parts being labeled identically. It can be seen as different from the prior art in FIG. 1 that, in the cold rolling mill according to the invention, the mandrel abutment 8 is displaced to the inlet side by a considerable amount. Nevertheless, the displacement of the feed carriage 4, which is determined by the length of the feed spindle 6, remains the same length, but considerably longer mandrel bars, one of which is indicated at 9, can be used. Because the feed carriage 4 is able to grip and advance the slug several times, the length of the feed spindle is no longer a criterion for the slug length; the latter can be at least as long as the distance between the entry point into the rolling mill 1 and the mandrel abutment 8.

Das mit 10 bezeichnete Luppenbett zwischen dem rückwärtigen Vorschubgetriebe 7 und dem Dornwiderlager 8 weist ortsfeste Luppen- und Dornstangenführungen 11 auf und ist in seiner Ausführung sehr einfach. Es ist in Figur 2 erkennbar, daß außer dem Luppenbett 10 die gleichen Konstruktionselemente Verwendung finden, die auch beim Stand der Technik vorhanden sind. Mit geringem Aufwand lassen sich durch den Vorschlag der Erfindung erhebliche Produktionssteigerungen dadurch erzielen, daß der Vorschubschlitten 4 ein und dieselbe Luppe 3 mehrfach ergreift und um einen bestimmten Vorschubweg in Pfeilrichtung 5 weiterführt. Die Luppe 3 wird dabei in üblicher Weise durch das geöffnete hintere Dornwiderlager 8 eingeführt, wobei ihre Länge wesentlich größer sein kann, als beim Stand der Technik, der in Figur 1 dargestellt ist.The bevel bed designated 10 between the rear feed gear 7 and the mandrel abutment 8 has fixed bevel and mandrel rod guides 11 and is very simple in its design. It can be seen in FIG. 2 that, in addition to the slag bed 10, the same construction elements are used that are also present in the prior art. Considerable increases in production can be achieved with little effort by the proposal of the invention in that the feed carriage 4 grasps the same die 3 several times and continues by a certain feed path in the direction of the arrow 5. The hole 3 is inserted in the usual way through the opened rear mandrel abutment 8, whereby its length can be considerably greater than in the prior art, which is shown in FIG.

Claims (3)

1. Verfahren zum Herstellen von Rohren in einem diskontinuierlich betriebenen Kaltwalzwerk, bei dem die Luppe über einen festen Dorn mittels auf der Luppe hin- und herabwälzender Kaliberwalzen gestreckt wird, während die Luppe von einem Vorschubschlitten ergriffen und mittels Vorschubspindeln in Walzrichtung verfahren wird, und das einlaufseitig ein drehbares Dorn Widerlager aufweist, in dem die Dornstange festklemmbar ist und das zum Laden des Walzwerkes mit der Luppe geöffnet werden kann, dadurch gekennzeichnet, daß der Vorschubschlitten die Luppe mehrfach ergreift und mehrmals über einen Teil ihrer Länge weitertransportiert, wobei der Vorschubschlitten nach jedem Transportweg von der Luppe gelöst und in seine Ausgangsstellung zurückbewegt wird.1. A method for producing pipes in a discontinuously operated cold rolling mill, in which the billet is stretched over a fixed mandrel by means of caliber rolls rolling down and down on the billet, while the billet is gripped by a feed slide and moved in the rolling direction by means of feed spindles, and that has a rotatable mandrel abutment on the inlet side, in which the mandrel rod can be clamped and which can be opened for loading the rolling mill with the slug, characterized in that the feed carriage grips the slug several times and is transported several times over part of its length, the feed carriage following each Transport path is released from the slab and moved back to its original position. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß der Vorschubschlitten (4) - wie bei kontinuierlich betriebenen Kaltpilgerwalzwerken bekannt - mit einem die Rohrluppe (3) an ihrem Umfang ergreifenden Spannfutter versehen ist und daß das Dornwiderlager (8) in einem Abstand vom rückwärtigen Vorschubspindelende entfernt angeordnet ist, der einem Mehrfachen des maximalen Vorschubschlittenweges entspricht.2. Device for carrying out the method according to claim 1, characterized in that the feed carriage (4) - as is known in continuously operated cold pilger rolling mills - is provided with a chuck (3) on its circumference gripping chuck and that the mandrel abutment (8) in is arranged at a distance from the rear feed spindle end which corresponds to a multiple of the maximum feed slide path. 3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 2, dadurch gekennzeichnet, daß zwischen dem rückwärtigen Vorschubgetriebe (7) und dem Dornwiderlager (8) ein Luppenbett (10) mit ortsfesten Luppen- und Dornstangenführungen (11) vorgesehen ist.3. A device for carrying out the method according to claim 2, characterized in that between the rear feed gear (7) and the mandrel abutment (8), a bobbin bed (10) with fixed bobbin and mandrel rod guides (11) is provided.
EP82730131A 1981-11-11 1982-10-21 Method of and device for manufacturing tubes in a cold rolling mill Expired EP0079295B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82730131T ATE15979T1 (en) 1981-11-11 1982-10-21 METHOD AND DEVICE FOR PRODUCTION OF TUBES IN A COLD ROLLING MILL.

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DE3145394 1981-11-11
DE19813145394 DE3145394A1 (en) 1981-11-11 1981-11-11 METHOD AND DEVICE FOR PRODUCING TUBES IN A COLD ROLLING MILL

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EP0079295A1 true EP0079295A1 (en) 1983-05-18
EP0079295B1 EP0079295B1 (en) 1985-10-09

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JP (1) JPH0641002B2 (en)
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CN101733280B (en) * 2009-05-14 2012-06-06 电钢城重型机械开放式股份公司 Cold-rolling pipe mill
WO2017167745A1 (en) * 2016-04-01 2017-10-05 Sandvik Materials Technology Deutschland Gmbh Cold pilger rolling mill and method for producing a pipe

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JP6479468B2 (en) * 2014-12-26 2019-03-06 三菱重工業株式会社 Steam turbine equipment, ship, and control method of steam turbine equipment
DE102016106035A1 (en) 2016-04-01 2017-10-05 Sandvik Materials Technology Deutschland Gmbh Cold pilger rolling mill and method of making a pipe

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Publication number Priority date Publication date Assignee Title
CN101733280B (en) * 2009-05-14 2012-06-06 电钢城重型机械开放式股份公司 Cold-rolling pipe mill
WO2017167745A1 (en) * 2016-04-01 2017-10-05 Sandvik Materials Technology Deutschland Gmbh Cold pilger rolling mill and method for producing a pipe
CN108883448A (en) * 2016-04-01 2018-11-23 山特维克原料技术德国公开股份有限公司 Pierre's format cold-rolling mill and method for manufacturing pipe fitting
US10946424B2 (en) 2016-04-01 2021-03-16 Sandvik Materials Technology Deutschland Gmbh Cold pilger rolling mill and method for producing a pipe

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Publication number Publication date
ATE15979T1 (en) 1985-10-15
DE3145394A1 (en) 1983-05-19
DE3145394C2 (en) 1988-06-09
JPS5890303A (en) 1983-05-30
JPH0641002B2 (en) 1994-06-01
EP0079295B1 (en) 1985-10-09

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