EP1023952A1 - Dual roll cross-rolling mill and method for rolling hollow billets of high-alloy steels - Google Patents
Dual roll cross-rolling mill and method for rolling hollow billets of high-alloy steels Download PDFInfo
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- EP1023952A1 EP1023952A1 EP00250015A EP00250015A EP1023952A1 EP 1023952 A1 EP1023952 A1 EP 1023952A1 EP 00250015 A EP00250015 A EP 00250015A EP 00250015 A EP00250015 A EP 00250015A EP 1023952 A1 EP1023952 A1 EP 1023952A1
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- EP
- European Patent Office
- Prior art keywords
- rolling mill
- roll cross
- mill according
- work surface
- base body
- Prior art date
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- 238000005096 rolling process Methods 0.000 title claims description 31
- 229910045601 alloy Inorganic materials 0.000 title claims description 15
- 239000000956 alloy Substances 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 14
- 229910000831 Steel Inorganic materials 0.000 title claims description 13
- 239000010959 steel Substances 0.000 title claims description 13
- 230000009977 dual effect Effects 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910000531 Co alloy Inorganic materials 0.000 claims description 2
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 230000000181 anti-adherent effect Effects 0.000 claims description 2
- 238000009694 cold isostatic pressing Methods 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 238000001513 hot isostatic pressing Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000007750 plasma spraying Methods 0.000 claims description 2
- 238000004663 powder metallurgy Methods 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 239000012876 carrier material Substances 0.000 claims 1
- 238000005304 joining Methods 0.000 claims 1
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 3
- 229910001182 Mo alloy Inorganic materials 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
Definitions
- the invention relates to a 2-roll cross-rolling mill for the production of hollow blocks high-alloy steels with guides for the rolling stock, which define the forming zone when punching of the hollow block transverse to the rolling axis close according to the preamble of Claim 1.
- lubricant can be transferred to the work rolls unintentionally, so that there is a slip (slip) between rolls and rolling stock, which up can lead to the termination of the punching process.
- the slippage is said to occur by adding a Si carbide containing liquid can be avoided, but this will be a additional device and medium required.
- the object of the present invention is to be seen in an effective and Find an affordable way to remove the harmful adhesions on the work surfaces Avoid guidance tools.
- the guide tools are each made of one consisting of a base material and one the work surface forming material with anti-adhesive properties compared to high-alloy steels and high heat resistance.
- the work surface of the Guide tools coated with a material that has no adhesion with the Pipe material or rolling stock material and due to its special Properties has a self-lubricating effect.
- The has particularly favorable properties for achieving the object of the invention Material molybdenum or a molybdenum base alloy from which the work surface consists.
- the work surface has a thickness between 0.1 and 10 mm. It but according to a special proposal of the invention, the thickness of the work surface be chosen so that the amounts of thermal expansion of the working part and Base body on the contact surface at working temperature are almost the same, so it there is no thermal stress and detachment of the work surface.
- connection between the base body and the material of the work surface can done positively according to a feature of the invention or according to another Feature of the invention by defined roughening of the contact surfaces between the Work surface and the basic body. It is also conceivable to join the work surface or thermal spraying (flame-plasma spraying) or on the Apply body. Another solution is to go through the working part hot isostatic pressing or cold isostatic pressing and sintering to produce by powder metallurgy.
- the base material of the base body is a high-strength steel or is an iron, nickel or cobalt-based alloy or completely made of the material of the working part. In the latter case, it is beneficial if the whole Guide tool consists monolithically of Mo or the Mo base alloy.
- the process for the production of hollow blocks from high-alloy steels with the Guide tools according to the invention provides that the work surface or entire guide tool before use according to the invention on a Temperature is brought above room temperature, so large thermal stresses be avoided.
- the guide tool should be before and after Punching process as well as during punching by suitable measures such as Compressed air nozzles or mechanical covers before contact with cooling water to be protected. It is also conceivable that the cooling and protection of the Guide tools before contact with water by inflating an inert gas, e.g. Nitrogen.
- an inert gas e.g. Nitrogen
- the roller cooling should, if necessary, automatically until the beginning of the next punching process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
Die Erfindung betrifft ein 2-Walzen-Schrägwalzwerk zur Herstellung von Hohlblöcken aus hochlegierten Stählen mit Führungen für das Walzgut, die die Umformzone beim Lochen des Hohlblockes quer zur Walzachse schließen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a 2-roll cross-rolling mill for the production of hollow blocks high-alloy steels with guides for the rolling stock, which define the forming zone when punching of the hollow block transverse to the rolling axis close according to the preamble of Claim 1.
Durch die Weiterentwicklung des Schrägwalzverfahrens und der metallurgischen Erzeugungsverfahren ist es heute möglich, nahtlose Rohre guter Qualität aus hochlegierten ferritischen, ferritisch-martensitischen und austenitischen Stählen durch Lochen auf dem Schrägwalzwerk herzustellen. Diese Methode hat gegenüber dem herkömmlichen Strangpreßverfahren einige Vorteile, vor allem durch Wegfallen des Ausbohrens der Blöcke, Erhöhung der Blockeinsatzgewichte und Verringerung der Exzentrizität und damit der Wanddickentoleranz. Besonders geeignet ist für das Lochen hochlegierter Stähle das Kegelschrägwalzwerk mit Führungsschuhen zum Schließen der Umformzone quer zur Walzachse, wie sie schon von R.C. Stiefel eingeführt wurden. Damit sind höhere Streckung und die Herstellung relativ dünnwandiger Hohlblöcke möglich, was mit einem 3-Walzen-Schrägwalzwerk oder mit einem 2-Walzen-Schrägwalzwerk mit Führungsscheiben nicht in dem gleichen Maße möglich ist.Through the further development of the cross rolling process and the metallurgical Production process today it is possible to make seamless pipes of good quality high-alloy ferritic, ferritic-martensitic and austenitic steels To make holes on the cross roll mill. This method has over conventional extrusion processes some advantages, especially by eliminating the Boring the blocks, increasing the block insert weights and reducing the Eccentricity and thus the wall thickness tolerance. Is particularly suitable for punching high-alloy steels the bevel cross rolling mill with guide shoes to close the Forming zone transverse to the rolling axis, as already used by R.C. Boots were introduced. This means higher stretching and the production of relatively thin-walled hollow blocks possible, what with a 3-roll cross-rolling mill or with a 2-roll cross-rolling mill with guide washers is not possible to the same extent.
Allerdings neigen hochlegierte Stähle sehr stark zur Adhäsion, d.h. zum Aufschweißen bzw. zum Ansetzen von Blockmaterial auf der Arbeitsfläche der Führungen. Das auf der Arbeitsfläche der Führungen festklebende Material (pick ups) führt zu mechanischen Beschädigungen in Form von tiefen scharfkantigen wendelförmig verlaufenden Riefen auf der Außenoberfläche der gelochten Hohlblöcke, die durch Schleifen, Schälen oder Abdrehen beseitigt werden müssen, was mit hohen Materialverlusten und zusätzlichem Arbeitsaufwand verbunden ist.However, high-alloy steels are very prone to adhesion, i.e. for welding or for placing block material on the work surface of the guides. That on the Working surface of the guides sticking material (pick ups) leads to mechanical Damage in the form of deep sharp-edged helical grooves the outer surface of the perforated hollow blocks, which are by grinding, peeling or Calibration must be eliminated, which with high material losses and additional Workload is connected.
Durch gezieltes Aufbringen eines Schmier- und Trennmittels auf die Führungen ist es möglich, das Entstehen der Materialansetzungen zu vermeiden bzw. hinauszuzögern. Allerdings kann dabei Schmiermittel ungewollt auf die Arbeitswalzen übertragen werden, so daß es zu einem Rutschen (Schlupf) zwischen Walzen und Walzgut kommt, was bis zum Abbruch des Lochvorganges führen kann.It is through the targeted application of a lubricant and release agent to the guides possible to avoid or delay the formation of material deposits. However, lubricant can be transferred to the work rolls unintentionally, so that there is a slip (slip) between rolls and rolling stock, which up can lead to the termination of the punching process.
Nach einer Literaturveröffentlichung soll der Schlupf durch Zuführen einer Si-Karbid enthaltenden Flüssigkeit vermieden werden können, jedoch wird dadurch wieder eine zusätzliche Vorrichtung und ein zusätzliches Medium erforderlich.According to a literature publication, the slippage is said to occur by adding a Si carbide containing liquid can be avoided, but this will be a additional device and medium required.
Eigene Versuche mit Führungsschuhen aus Grauguß GGG und GGL zeigten eine gewisse Eignung gegen Adhäsion, aber ihr Reibungs- und Verschleißverhalten war für den Produktionsbetrieb unbefriedigend.Own tests with guide shoes made of gray cast iron GGG and GGL showed one certain suitability against adhesion, but their friction and wear behavior was for the production operation unsatisfactory.
Die Aufgabe der vorliegenden Erfindung ist darin zu sehen, einen wirkungsvollen und preisgünstigen Weg zu finden, um die schädlichen Adhäsionen auf den Arbeitsflächen der Führungswerkzeuge zu vermeiden.The object of the present invention is to be seen in an effective and Find an affordable way to remove the harmful adhesions on the work surfaces Avoid guidance tools.
Deshalb wird erfindungsgemäß vorgeschlagen, die Führungswerkzeuge jeweils aus einem aus einem Trägerwerkstoff bestehenden Grundkörper und einem die Arbeitsfläche bildenden Werkstoff mit gegenüber hochlegierten Stählen antiadhäsiven Eigenschaften und hoher Warmfestigkeit zusammenzusetzen. Praktisch wird die Arbeitsfläche der Führungswerkzeuge mit einem Material beschichtet, das keine Adhäsion mit dem Rohrmaterial bzw. Walzgutwerkstoff eingeht und auf Grund seiner besonderen Eigenschaften einen selbstschmierenden Effekt aufweist.It is therefore proposed according to the invention that the guide tools are each made of one consisting of a base material and one the work surface forming material with anti-adhesive properties compared to high-alloy steels and high heat resistance. The work surface of the Guide tools coated with a material that has no adhesion with the Pipe material or rolling stock material and due to its special Properties has a self-lubricating effect.
Eine ähnliche Lösung wird zwar in der DE-PS 31 14 177 C2 für einen anderen Zweck vorgeschlagen, wobei aber hochwarmfeste Hartstoffschichten auf einem Grundkörper erzeugt werden, die das Problem der Vermeidung der Adhäsion von hochlegiertem Stahl mit den Führungswerkzeugen nicht lösen können. A similar solution is indeed in DE-PS 31 14 177 C2 for another purpose proposed, but high-temperature hard layers of hard material on a base body which creates the problem of avoiding the adhesion of high-alloy steel cannot solve with the guide tools.
Der Gedanke der vorliegenden Erfindung läßt sich gleichermaßen erfolgreich bei Führungswerkzeugen in Form von Schuhen, Scheiben oder Rollen einsetzenThe idea of the present invention can be equally successfully applied Use guide tools in the form of shoes, discs or rollers
Besonders günstige Eigenschaften zur Lösung der erfindungsgemäßen Aufgabe hat der Werkstoff Molybdän oder eine Molybdänbasislegierung, aus dem die Arbeitsfläche besteht.The has particularly favorable properties for achieving the object of the invention Material molybdenum or a molybdenum base alloy from which the work surface consists.
Es reicht aus, wenn die Arbeitsfläche eine Dicke zwischen 0,1 und 10 mm aufweist. Es sollte aber nach einem besonderen Vorschlag der Erfindung die Dicke der Arbeitsfläche so gewählt werden, daß die Beträge der Wärmedehnung des Arbeitsteils und des Grundkörpers an der Kontaktfläche bei Arbeitstemperatur nahezu gleich sind, damit es nicht zu Wärmespannungen und Ablösungen der Arbeitsfläche kommt.It is sufficient if the work surface has a thickness between 0.1 and 10 mm. It but according to a special proposal of the invention, the thickness of the work surface be chosen so that the amounts of thermal expansion of the working part and Base body on the contact surface at working temperature are almost the same, so it there is no thermal stress and detachment of the work surface.
Die Verbindung zwischen dem Grundkörper und dem Werkstoff der Arbeitsfläche kann nach einem Merkmal der Erfindung formschlüssig erfolgen oder nach einem anderen Merkmal der Erfindung durch definiertes Aufrauhen der Kontaktflächen zwischen der Arbeitsfläche und dem Grundkörper. Es ist auch denkbar, die Arbeitsfläche durch Fügen oder thermisches Spritzen (Flamm- Plasma-Spritzen) herzustellen bzw. auf den Grundkörper aufzubringen. Noch eine andere Lösung besteht darin, den Arbeitsteil durch heißisostatisches Pressen oder kaltisostatisches Pressen und Sintern auf pulvermetallurgischem Wege herzustellen.The connection between the base body and the material of the work surface can done positively according to a feature of the invention or according to another Feature of the invention by defined roughening of the contact surfaces between the Work surface and the basic body. It is also conceivable to join the work surface or thermal spraying (flame-plasma spraying) or on the Apply body. Another solution is to go through the working part hot isostatic pressing or cold isostatic pressing and sintering to produce by powder metallurgy.
Es ist günstig, wenn der Trägerwerkstoff des Grundkörpers ein höherfester Stahl oder eine Eisen-, Nickel- oder Kobaltbasislegierung ist oder auch komplett aus dem Werkstoff des Arbeitsteils besteht. In letzterem Fall ist es günstig, wenn das gesamte Führungswerkzeug monolithisch aus Mo oder der Mo-Basislegierung besteht.It is favorable if the base material of the base body is a high-strength steel or is an iron, nickel or cobalt-based alloy or completely made of the material of the working part. In the latter case, it is beneficial if the whole Guide tool consists monolithically of Mo or the Mo base alloy.
Das Verfahren zur Herstellung von Hohlblöcken aus hochlegierten Stählen mit den erfindungsgemäßen Führungswerkzeugen sieht vor, daß die Arbeitsfläche oder das gesamte Führungswerkzeug vor der erfindungsgemäßen Verwendung auf eine Temperatur oberhalb Raumtemperatur gebracht wird, damit große Wärmespannungen vermieden werden. The process for the production of hollow blocks from high-alloy steels with the Guide tools according to the invention provides that the work surface or entire guide tool before use according to the invention on a Temperature is brought above room temperature, so large thermal stresses be avoided.
Aus dem gleichen Grund sollte das Führungswerkzeug vor und nach dem Lochungsvorgang sowie während des Lochens durch geeignete Maßnahmen wie Druckluftdüsen oder mechanische Abdeckungen vor dem Kontakt mit Kühlwasser geschützt werden. Denkbar ist es auch, daß die Kühlung und der Schutz der Führungswerkzeuge vor Wasserkontakt durch Aufblasen eines inerten Gases, z.B. Stickstoff, erfolgt.For the same reason, the guide tool should be before and after Punching process as well as during punching by suitable measures such as Compressed air nozzles or mechanical covers before contact with cooling water to be protected. It is also conceivable that the cooling and protection of the Guide tools before contact with water by inflating an inert gas, e.g. Nitrogen.
Nach dem Lochungsvorgang sollte die Walzenkühlung, ggf. automatisch bis zum Beginn des nächsten Lochungsvorgangs unterbrochen werden.After the punching process, the roller cooling should, if necessary, automatically until the beginning of the next punching process.
Aus wirtschaftlicher und ökologischer Sicht ist es sinnvoll, wenn verschlissene Arbeitsflächen nach spanender Abtragung regeneriert werden und der Werkstoff der Arbeitsfläche durch mechanisches oder thermisches Trennen oder durch Einschmelzen des Grundkörperwerkstoffes zurückgewonnen wird.From an economic and ecological point of view, it makes sense if worn out Work surfaces are regenerated after machining and the material of the Work surface by mechanical or thermal separation or by melting of the base material is recovered.
Claims (16)
dadurch gekennzeichnet,
daß die Führungswerkzeuge jeweils aus einem aus einem Trägerwerkstoff bestehenden Grundkörper und einem die Arbeitsfläche bildenden Werkstoff mit gegenüber hochlegierten Stählen antiadhäsiven Eigenschaften und hoher Warmfestigkeit zusammengesetzt sind.2-roll cross-rolling mill for the production of hollow blocks from high-alloy steels with guide tools for the rolling stock, which close the forming zone when the hollow block is punched transversely to the rolling axis,
characterized,
that the guide tools are each composed of a base body consisting of a carrier material and a material forming the work surface with anti-adhesive properties and high heat resistance compared to high-alloy steels.
dadurch gekennzeichnet,
daß die Führungswerkzeuge Schuhe, Scheiben oder Rollen sind.2-roll cross rolling mill according to claim 1,
characterized,
that the guide tools are shoes, discs or rollers.
dadurch gekennzeichnet,
daß der Werkstoff der Arbeitsfläche Molybdän oder eine Molybdänbasislegierung ist.2-roll cross rolling mill according to claim 1 and 2,
characterized,
that the material of the work surface is molybdenum or a molybdenum-based alloy.
dadurch gekennzeichnet,
daß die Dicke der Arbeitsfläche 0,1 bis 10 mm beträgt.2-roll cross rolling mill according to claim 1 to 3,
characterized,
that the thickness of the work surface is 0.1 to 10 mm.
dadurch gekennzeichnet,
daß die Dicke der Arbeitsfläche so gewählt wird, daß die Beträge der Wärmedehnung des Arbeitsteils und des Grundkörpers an der Kontaktfläche bei Arbeitstemperatur nahezu gleich sind. 2-roll cross rolling mill according to one of claims 1 to 4,
characterized,
that the thickness of the working surface is chosen so that the amounts of thermal expansion of the working part and the base body at the contact surface at working temperature are almost the same.
dadurch gekennzeichnet,
daß die drehfeste Verbindung zwischen Grundkörper und Arbeitsfläche formschlüssig erfolgt.2-roll cross-rolling mill according to one of claims 1 to 5,
characterized,
that the non-rotatable connection between the base body and the work surface is positive.
dadurch gekennzeichnet,
daß die drehfeste Verbindung zwischen Grundkörper und Arbeitsfläche durch definiertes Aufrauhen der Kontaktflächen zwischen Arbeitsfläche und Grundkörpers gewährleistet wird.2-roll cross-rolling mill according to one of claims 1 to 6,
characterized,
that the non-rotatable connection between the base body and the work surface is ensured by a defined roughening of the contact surfaces between the work surface and the base body.
dadurch gekennzeichnet,
daß der Arbeitsteil durch heißisostatisches Pressen oder kaltisostatisches Pressen und Sintern auf pulvermetallurgischem Wege hergestellt wird2-roll cross rolling mill according to one of claims 1 to 7,
characterized,
that the working part is produced by hot isostatic pressing or cold isostatic pressing and sintering by powder metallurgy
dadurch gekennzeichnet,
daß die Arbeitsfläche durch Fügen oder thermisches Spritzen (Flamm-, Plasma-Spritzen) hergestellt bzw. auf den Grundkörper aufgebracht wird.2-roll cross rolling mill according to one of claims 1 to 8,
characterized,
that the work surface is made by joining or thermal spraying (flame, plasma spraying) or applied to the base body.
dadurch gekennzeichnet,
daß der Werkstoff des Grundkörpers ein höherfester Stahl oder eine Eisen-, Nickel- oder Kobaltbasislegierung ist.2-roll cross rolling mill according to one of claims 1 to 8,
characterized,
that the material of the base body is a high-strength steel or an iron, nickel or cobalt-based alloy.
dadurch gekennzeichnet,
daß der Werkstoff des Grundkörpers der Werkstoff des Arbeitsteils ist. 2-roll cross rolling mill according to one of claims 1 to 8,
characterized,
that the material of the base body is the material of the working part.
dadurch gekennzeichnet,
daß das gesamte Führungswerkzeug monolithisch aus Mo oder der Mo-Basislegierung besteht.2-roll cross-rolling mill for the production of hollow blocks from high-alloy steels with guide tools for the rolling stock, which close the forming zone when the hollow block is punched transversely to the rolling axis,
characterized,
that the entire guide tool is monolithically made of Mo or the Mo base alloy.
dadurch gekennzeichnet,
daß die Arbeitsfläche oder das gesamte Führungswerkzeug vor der erfindungsgemäßen Verwendung auf eine Temperatur oberhalb Raumtemperatur gebracht wird.Process for the production of hollow blocks from high-alloy steels with guide tools for the rolling stock, which close the forming zone when the hollow block is punched transversely to the rolling axis using a 2-roll cross-rolling mill according to one of Claims 1 to 12,
characterized,
that the work surface or the entire guide tool is brought to a temperature above room temperature before use.
dadurch gekennzeichnet,
daß die Führungswerkzeuge vor und nach dem Lochungsvorgang sowie während des Lochens durch geeignete Maßnahmen wie Druckluftdüsen oder mechanische Abdeckungen vor dem Kontakt mit Kühlwasser geschützt werden.Process for the production of hollow blocks according to claim 13,
characterized,
that the guide tools are protected against contact with cooling water before and after the punching process and during the punching by suitable measures such as compressed air nozzles or mechanical covers.
dadurch gekennzeichnet,
daß die Kühlung und der Schutz der Führungswerkzeuge vor Wasserkontakt durch Aufblasen eines inerten Gases, z.B. Stickstoff, erfolgt.Process for the production of hollow blocks according to claim 14,
characterized,
that the cooling and protection of the guide tools against water contact by blowing an inert gas, such as nitrogen, is done.
dadurch gekennzeichnet,
daß nach dem Lochungsvorgang die Walzenkühlung, ggf. z.B. automatisch, bis zum Beginn des nächsten Lochungsvorgangs unterbrochen werden kann.Method for producing hollow blocks according to one of claims 10 to 15,
characterized,
that after the punching process, the roll cooling, possibly automatically for example, can be interrupted until the start of the next punching process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19903974A DE19903974A1 (en) | 1999-01-26 | 1999-01-26 | 2-roll cross-rolling mill and process for the production of hollow blocks from high-alloy steels |
| DE19903974 | 1999-01-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1023952A1 true EP1023952A1 (en) | 2000-08-02 |
| EP1023952B1 EP1023952B1 (en) | 2002-05-22 |
Family
ID=7896063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00250015A Expired - Lifetime EP1023952B1 (en) | 1999-01-26 | 2000-01-18 | Dual roll cross-rolling mill and method for rolling hollow billets of high-alloy steels |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6260396B1 (en) |
| EP (1) | EP1023952B1 (en) |
| JP (1) | JP4624514B2 (en) |
| AT (1) | ATE217813T1 (en) |
| DE (2) | DE19903974A1 (en) |
| ES (1) | ES2173069T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012107041B4 (en) | 2012-08-01 | 2014-05-15 | Benteler Deutschland Gmbh | Method and device for producing a metallic hollow block from a metallic block |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153506A (en) * | 1983-02-19 | 1984-09-01 | Kawasaki Steel Corp | Manufacture of guide shoe used for manufacturing seamless pipe excellent in wear-and-seizure-resistant properties |
| JPS6099407A (en) * | 1983-11-04 | 1985-06-03 | Sumitomo Metal Ind Ltd | Guide shoe for seamless steel pipe mill |
| JPS6250009A (en) * | 1985-08-27 | 1987-03-04 | Nippon Steel Corp | Mandrel for steel pipe rolling mill |
| US4832912A (en) * | 1981-08-27 | 1989-05-23 | Mitsubishi Kinzoku Kabushiki Kaisha | Thermal and wear resistant tough alloy |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078412A (en) * | 1970-05-11 | 1978-03-14 | Columbiana Foundry Company | Support shoes and methods of supporting metal members such as seamless tubes |
| US4006618A (en) * | 1974-07-23 | 1977-02-08 | Samon Yanagimoto | Method of producing seamless steel tube |
| JPH01154808A (en) * | 1987-12-11 | 1989-06-16 | Nippon Steel Corp | Tool for drawing steel tube |
| JPH01191453A (en) * | 1988-01-27 | 1989-08-01 | Hitachi Ltd | Semiconductor device |
| JPH02133106A (en) * | 1988-11-10 | 1990-05-22 | Sumitomo Metal Ind Ltd | Plug for tube manufacturing machine |
| JPH02224808A (en) * | 1989-02-27 | 1990-09-06 | Kawasaki Steel Corp | Cross helical rolling method for seamless steel pipe |
| JPH02224806A (en) * | 1989-02-28 | 1990-09-06 | Nkk Corp | Plug for producing seamless steel pipe |
| JP2590595B2 (en) * | 1990-07-24 | 1997-03-12 | 住友金属工業株式会社 | Manufacturing method of seamless stainless steel pipe |
| JP3545834B2 (en) * | 1994-09-21 | 2004-07-21 | 株式会社リコー | Thermal fixing device |
| JPH10130687A (en) * | 1996-10-30 | 1998-05-19 | Kawasaki Steel Corp | Lubricant composition for hot working |
-
1999
- 1999-01-26 DE DE19903974A patent/DE19903974A1/en not_active Withdrawn
-
2000
- 2000-01-18 ES ES00250015T patent/ES2173069T3/en not_active Expired - Lifetime
- 2000-01-18 AT AT00250015T patent/ATE217813T1/en not_active IP Right Cessation
- 2000-01-18 EP EP00250015A patent/EP1023952B1/en not_active Expired - Lifetime
- 2000-01-18 DE DE50000172T patent/DE50000172D1/en not_active Expired - Lifetime
- 2000-01-21 JP JP2000012797A patent/JP4624514B2/en not_active Expired - Fee Related
- 2000-01-26 US US09/491,822 patent/US6260396B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832912A (en) * | 1981-08-27 | 1989-05-23 | Mitsubishi Kinzoku Kabushiki Kaisha | Thermal and wear resistant tough alloy |
| JPS59153506A (en) * | 1983-02-19 | 1984-09-01 | Kawasaki Steel Corp | Manufacture of guide shoe used for manufacturing seamless pipe excellent in wear-and-seizure-resistant properties |
| JPS6099407A (en) * | 1983-11-04 | 1985-06-03 | Sumitomo Metal Ind Ltd | Guide shoe for seamless steel pipe mill |
| JPS6250009A (en) * | 1985-08-27 | 1987-03-04 | Nippon Steel Corp | Mandrel for steel pipe rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE217813T1 (en) | 2002-06-15 |
| US6260396B1 (en) | 2001-07-17 |
| DE50000172D1 (en) | 2002-06-27 |
| JP2000225403A (en) | 2000-08-15 |
| JP4624514B2 (en) | 2011-02-02 |
| DE19903974A1 (en) | 2000-07-27 |
| EP1023952B1 (en) | 2002-05-22 |
| ES2173069T3 (en) | 2002-10-16 |
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