EP3016755B1 - Method and device for coating scaled forming products with a lubricant - Google Patents

Method and device for coating scaled forming products with a lubricant Download PDF

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Publication number
EP3016755B1
EP3016755B1 EP14741823.0A EP14741823A EP3016755B1 EP 3016755 B1 EP3016755 B1 EP 3016755B1 EP 14741823 A EP14741823 A EP 14741823A EP 3016755 B1 EP3016755 B1 EP 3016755B1
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EP
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Prior art keywords
deformation
lubricant
scale
product
residence chamber
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EP14741823.0A
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German (de)
French (fr)
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EP3016755A2 (en
Inventor
Harri Weinhold
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Ecoform Umformtechnik GmbH
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Ecoform Umformtechnik GmbH
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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
    • B21C9/00—Cooling, heating or lubricating drawing material
    • 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
    • B21C9/00—Cooling, heating or lubricating drawing material
    • B21C9/005—Cold application of the lubricant

Definitions

  • the invention relates to the field of metallurgy and relates to a method and apparatus for coating scale-bearing metallic stranded forming material with a lubricant for forming in a downstream drawing process.
  • wire rod forming material plays an important role. It is well known that wire rod is covered with oxide, hydroxide and scale layers or the like. This, especially from the hot forming process originating surface layers must be carefully removed before pulling, because their presence not only cause a much higher wear of the drawing tools and a significant reduction in the possible pulling speed, but also a strong reduction in quality of the wire to be pulled. In many cases, a forming process under such conditions is not possible at all.
  • the mechanical cleaning methods can be subdivided during wire drawing usually in three in the drawing direction successive cleaning areas.
  • the wire rod is forcibly guided through a tortuous path of two angularly staggered roller assemblies, whereby the wire is bent both mutually and in two planes rotated by 90 ° and thus more or less flaking off the brittle scale layers from the metal surface ,
  • a second cleaning area is required in each case, namely brushing with wire brush systems.
  • the wire rod is treated in a third cleaning area to remove the remaining oxide dust residues with compressed air jets or high-pressure water jet impingement.
  • the bonded forming material is first enveloped in a lubricant chamber with a closed layer of a lubricant and subjected to a cross-section reducing forming ( DE 10 2004 015 975 B3 ).
  • This deformation causes the scale layer separates from the forming material and breaks into small layer parts, which are absorbed by the lubricant sheath.
  • the material thus treated is subjected to fine cleaning immediately after leaving the lubricant chamber with rotating plastic brushes and with a compressed air blower. Thereafter, a wire completely cleaned of scale is present for further processing in a downstream drawing process.
  • the invention has for its object to develop a method and an apparatus with which the coating of scale-bonded metallic stranded Umformgut with a solid lubricant for forming in a downstream drawing process while avoiding the removal of existing on metallic Umformgut scale layers or solid layers containing scale , is possible. At the same time the conditions for a substantial improvement of the stability of the downstream drawing process and the quality of the manufactured products are to be created.
  • the scale-bonded forming material is coated with a solid lubricant before the downstream drawing process and formed with a degree of deformation ⁇ of> 3% and then through at least one storage chamber for mixing the resulting from forming the scale layer Zunderteilchen with that on the Umformgut after this transformation drawn lubricant.
  • the material to be formed is advantageously drawn through a lubricant-filled chamber in which the solid lubricant is pressurized.
  • the brittle scale layer is detached from the material surface of the forming material and broken up into small scale particles.
  • the amount of the degree of deformation ⁇ is to be chosen so high that it is sufficient to bring about complete detachment of the scale layer from the metallic matrix of the surface of the material to be formed as a result of the surface enlargement.
  • the degree of deformation ⁇ must not be too high in order to disadvantageously press the scale layer detached in this way again onto the surface of the material to be formed.
  • the Umformgut is then pulled through a stowage chamber with cylindrical or conically running inside diameter in the pulling direction.
  • the forming material has a coating on exit from the stagnation chamber which need not be removed, but rather is usable as a high performance lubricant film for a downstream drawing process.
  • This lubricant film consists of the solid lubricant used in the pressure chamber and embedded therein Zunderteilchen.
  • the Zunderstaubteilchen improve in a surprising way quite decisively the pressure and temperature stability of the lubricant film and create the conditions for a substantial improvement in the stability of the downstream drawing process and the quality of the products produced.
  • the pressure prevailing in the storage chamber in the lubricant-scale particle mixture is regulated.
  • a storage chamber is used with an existing at the outlet, the thickness of the desired on the expiring Umformgut desired lubricant-scale particle film opening.
  • a die can be used for the determination of the thickness of the desired on the expiring Umformgut lubricant Zunderteilchen film.
  • the invention comprises a device arranged on a drawing machine, comprising means for enveloping a scale-bonded forming material with a solid lubricant under pressure and one or more downstream dies for forming the coated Umformgutes with a degree of deformation ⁇ of> 3% and a downstream Stowing chamber for mixing the resulting from forming the scale layer Zunderteilchen with the present on the Umformgut after this transformation lubricant.
  • the device for wrapping the scale-bonded forming material with a solid lubricant and for forming with a degree of deformation ⁇ of> 3% according to the invention is a lubricant-filled pressure chamber.
  • the stagnation chamber for mixing the scale particles formed as a result of forming from the scale layer with the lubricant present on the material to be formed after forming has a cylindrical diameter or conical inner diameter, wherein the inside diameter of the cylindrical stowage chamber is greater than 0.02 mm , than the diameter of the formed material.
  • the stowage chamber has an opening which determines the thickness of the lubricant-scale particle film desired on the outgoing material to be formed. This opening can be conveniently realized by a die with appropriate dimensions.
  • a device for regulating the lubricant pressure prevailing in the stagnation chamber can be arranged on the stagnation chamber.
  • the invention includes in its core a combination of technical measures for cleaning pretreatment of scale-shaped forming material with technical measures for coating such Umformgut for downstream forming.
  • advantageous synergistic effects are achieved by completely dispensing with a separate cleaning process for removal of the scale in the case of scale-bonded forming material and at the same time achieving a lubricant coating which, owing to its high pressure and temperature resistance, enables particularly efficient forming processes.
  • the apparatus shown in the drawing for coating a scale-bearing forming material 1 contains a (only partially shown) pressure chamber 2, which with a solid lubricant 3 is filled, which is under a pressure P.
  • the device is arranged on a drawing machine, not shown in the drawing before the forming stages serving forming.
  • the forming material 1 is pulled in the pulling direction Z by the device.
  • the Zunderbelag 5 located on the forming material 1 is crushed into small scale particles and released from the metallic matrix of the material to be formed.
  • the tinder particles are transported together with the lubricant on the Umformgut 1 in the subsequently arranged stowage chamber element 6, which has a cylindrical passage channel 7 whose inner diameter is 0.04 mm larger than the outer diameter of the Umformgutes.
  • the passage channel 7 of the storage chamber element 6 there is an intensive mixing of the scale particles with the lubricant.
  • a die 8 is arranged, which serves with its outlet opening for determining the coating thickness of the lubricant Zunderteilchen film on the Umformgut 1.
  • This lubricant film consists of the solid lubricant used in the pressure chamber and embedded therein Zunderteilchen.
  • the scale particles improve in a surprising manner quite decisively the pressure and temperature stability of the lubricant film and create the conditions for a substantial improvement in the stability of the downstream forming process and the quality of the products produced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Lubricants (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Description

Die Erfindung bezieht sich auf das Gebiet der Metallurgie und betrifft ein Verfahren und Vorrichtung zum Beschichten von zunderbehaftetem metallischem strangförmigem Umformgut mit einem Schmierstoff für die Umformung in einem nachgeordneten Ziehprozess.The invention relates to the field of metallurgy and relates to a method and apparatus for coating scale-bearing metallic stranded forming material with a lubricant for forming in a downstream drawing process.

Bei der Umformung von zunderbehaftetem metallischem strangförmigem Umformgut spielt der vorherige Reinigungsvorgang des üblicherweise als Walzdraht bezeichneten Umformgutes eine bedeutende Rolle. Es ist allgemein bekannt, dass Walzdraht mit Oxid-, Hydroxid- und Zunderschichten oder ähnlichem bedeckt ist. Diese, vor allem vom Warmumformprozess herrührenden Oberflächenschichten müssen vor dem Ziehen sorgfältig entfernt werden, da ihr Vorhandensein nicht nur einen wesentlich höheren Verschleiß der Ziehwerkzeuge und eine bedeutende Reduzierung der möglichen Ziehgeschwindigkeit bewirken, sondern auch eine starke Qualitätsverminderung des zu ziehenden Drahtes nach sich ziehen. In vielen Fällen ist ein Umformprozess unter solchen Bedingungen auch gar nicht möglich.In the forming of scale-bonded metallic stranded Umformgut the previous cleaning process of the usually referred to as wire rod forming material plays an important role. It is well known that wire rod is covered with oxide, hydroxide and scale layers or the like. This, especially from the hot forming process originating surface layers must be carefully removed before pulling, because their presence not only cause a much higher wear of the drawing tools and a significant reduction in the possible pulling speed, but also a strong reduction in quality of the wire to be pulled. In many cases, a forming process under such conditions is not possible at all.

Für die Entfernung derartiger Oberflächenschichten ist eine Vielzahl von Verfahren bekannt, die sich im Wesentlichen in zwei Gruppen einteilen lassen, und zwar den chemischen und den mechanischen Reinigungsverfahren.For the removal of such surface layers, a variety of methods are known, which can be divided into two main groups, namely the chemical and the mechanical cleaning process.

Bei der Gruppe der chemischen Reinigungsverfahren wird im Kern ein Nassbeizen des Drahtes durchgeführt, wobei jedoch eine Reihe zusätzlicher Operationen erforderlich ist, wie beispielsweise Neutralisieren, Spülen, Trocknen usw. Derartige Verfahrensschritte und die dazugehörigen Einrichtungen sind sehr kostenaufwändig. Darüber hinaus belasten die dafür erforderlichen Medien, wie Säuren und Laugen, in nicht unbeträchtlichem Maße die Umwelt.In the group of chemical cleaning processes, a wet pickling of the wire is performed in the core, but with a series of additional operations such as neutralizing, rinsing, drying, etc. Such process steps and associated equipment are very costly. In addition, the media required for this, such as acids and alkalis, burden the environment to a not inconsiderable degree.

Die mechanischen Reinigungsverfahren lassen sich beim Drahtziehen üblicherweise in drei in Ziehrichtung aufeinanderfolgende Reinigungsbereiche unterteilen.The mechanical cleaning methods can be subdivided during wire drawing usually in three in the drawing direction successive cleaning areas.

Im ersten Reinigungsbereich wird der Walzdraht durch eine gewundene Strecke von jeweils zwei im Winkel von 90° versetzten Walzenanordnungen zwangsgeführt, wodurch der Draht sowohl wechselseitig als auch in zwei um 90° gedrehten Ebenen gebogen wird und somit die spröden Zunderschichten mehr oder weniger von der Metalloberfläche abplatzen. Danach ist in jedem Falle ein zweiter Reinigungsbereich erforderlich, nämlich das Bürsten mit Drahtbürstensystemen. Abschließend wird der Walzdraht in einem dritten Reinigungsbereich zur Entfernung der noch anhaftenden Oxidstaubrückstände mit Druckluftstrahlen oder Hochdruck-Wasserstrahl-Beaufschlagung behandelt.In the first cleaning area, the wire rod is forcibly guided through a tortuous path of two angularly staggered roller assemblies, whereby the wire is bent both mutually and in two planes rotated by 90 ° and thus more or less flaking off the brittle scale layers from the metal surface , After that, a second cleaning area is required in each case, namely brushing with wire brush systems. Finally, the wire rod is treated in a third cleaning area to remove the remaining oxide dust residues with compressed air jets or high-pressure water jet impingement.

Nachteilig bei den mechanischen Reinigungsverfahren sind der sehr große technologische Aufwand und der Umstand, dass infolge der mechanischen Beanspruchung des Umformgutes eine Schädigung der Oberfläche und des Gefüges sowie eine Versprödung des Umformgutes eintreten.Disadvantages of the mechanical cleaning processes are the great technological complexity and the fact that, as a result of the mechanical stress on the material to be formed, damage to the surface and the structure as well as embrittlement of the material to be formed occur.

Bekannt ist auch ein Verfahren bei dem zum Entfernen von Zunder- und Rostschichten das behaftete Umformgut zunächst in einer Schmierstoffkammer mit einer geschlossenen Schicht eines Schmierstoffs umhüllt und einer querschnittsvermindernden Umformung unterworfen wird ( DE 10 2004 015 975 B3 ). Diese Umformung führt dazu, dass sich die Zunderschicht vom Umformgut ablöst und in kleine Schichtteile zerbricht, welche von der Schmierstoffumhüllung aufgenommen werden. Das so behandelte Umformgut wird unmittelbar nach dem Austritt aus der Schmierstoffkammer mit rotierenden Plastbürsten sowie mit einem Druckluftgebläse einer Feinreinigung unterworfen. Danach liegt ein völlig von Zunder gereinigter Draht zur Weiterverarbeitung in einem nachgeordneten Ziehprozess vor. Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu entwickeln, mit denen das Beschichten von zunderbehaftetem metallischem strangförmigem Umformgut mit einem Festschmierstoff für die Umformung in einem nachgeordneten Ziehprozess unter Vermeidung des Entfernens von auf metallischem Umformgut vorhandenen Zunderschichten oder Feststoffschichten, die Zunder enthalten, möglich ist. Gleichzeitig sollen die Voraussetzungen für eine wesentliche Verbesserung der Stabilität des nachgeordneten Ziehprozesses und der Qualität der hergestellten Produkte geschaffen werden.Also known is a method in which, for removing scale and rust layers, the bonded forming material is first enveloped in a lubricant chamber with a closed layer of a lubricant and subjected to a cross-section reducing forming ( DE 10 2004 015 975 B3 ). This deformation causes the scale layer separates from the forming material and breaks into small layer parts, which are absorbed by the lubricant sheath. The material thus treated is subjected to fine cleaning immediately after leaving the lubricant chamber with rotating plastic brushes and with a compressed air blower. Thereafter, a wire completely cleaned of scale is present for further processing in a downstream drawing process. The invention has for its object to develop a method and an apparatus with which the coating of scale-bonded metallic stranded Umformgut with a solid lubricant for forming in a downstream drawing process while avoiding the removal of existing on metallic Umformgut scale layers or solid layers containing scale , is possible. At the same time the conditions for a substantial improvement of the stability of the downstream drawing process and the quality of the manufactured products are to be created.

Diese Aufgabe wird mit den in den Patentansprüche 1 und 6 aufgezeigten Merkmalen gelöst. Bevorzugte Ausgestaltungen sind in den abhängigen Unteransprüchen enthalten.This object is achieved with the indicated in the claims 1 and 6 features. Preferred embodiments are contained in the dependent subclaims.

Beim erfindungsgemäßen Verfahren wird das zunderbehaftete Umformgut vor dem nachgeordneten Ziehprozess mit einem Festschmierstoff umhüllt und mit einem Umformgrad ε von > 3% umgeformt und danach durch mindestens eine Staukammer zur Vermischung der infolge der Umformung aus der Zunderschicht entstandenen Zunderteilchen mit dem auf dem Umformgut nach dieser Umformung vorhandenen Schmierstoff gezogen.In the method according to the invention, the scale-bonded forming material is coated with a solid lubricant before the downstream drawing process and formed with a degree of deformation ε of> 3% and then through at least one storage chamber for mixing the resulting from forming the scale layer Zunderteilchen with that on the Umformgut after this transformation drawn lubricant.

Zur Umhüllung mit dem Festschmierstoff und zur Umformung mit einem Umformgrad ε von >3% wird das Umformgut in vorteilhafter Weise durch eine schmiermittelgefüllte Kammer gezogen, in der der Festschierstoff unter Druck gesetzt wird. Bei der Umformung wird infolge der am Umformgut stattfindenden Oberflächenvergrößerung die spröde Zunderschicht von der Umformgutoberfläche gelöst und in kleine Zunderteilchen zerbrochen.For wrapping with the solid lubricant and for forming with a degree of deformation ε of> 3%, the material to be formed is advantageously drawn through a lubricant-filled chamber in which the solid lubricant is pressurized. During forming, as a result of the surface enlargement taking place on the material to be formed, the brittle scale layer is detached from the material surface of the forming material and broken up into small scale particles.

Bei der Bemessung des Umformgrades ist unter Berücksichtigung unterschiedlicher Werkstoffqualitäten der Betrag des Umformgrades ε so hoch zu wählen, dass er ausreicht, um ein vollständiges Loslösen der Zunderschicht von der metallischen Matrix der Oberfläche des Umformgutes infolge der Oberflächenvergrößerung zu bewirken. Jedoch darf der Umformgrad ε nicht zu hoch gewählt werden, um die auf diese Art und Weise losgelöste Zunderschicht unvorteilhaft wieder an die Oberfläche des Umformgutes zu pressen.When dimensioning the degree of deformation, taking into account different material qualities, the amount of the degree of deformation ε is to be chosen so high that it is sufficient to bring about complete detachment of the scale layer from the metallic matrix of the surface of the material to be formed as a result of the surface enlargement. However, the degree of deformation ε must not be too high in order to disadvantageously press the scale layer detached in this way again onto the surface of the material to be formed.

Zur Vermischung der entstandenen Zunderteilchen mit dem auf dem Umformgut vorhandenen Schmierstoff wird das Umformgut anschließend durch eine Staukammer mit in Durchzugsrichtung zylindrisch oder konisch verlaufendem Innendurchmesser gezogen.To mix the resulting scale particles with the lubricant present on the Umformgut the Umformgut is then pulled through a stowage chamber with cylindrical or conically running inside diameter in the pulling direction.

Das Umformgut weist beim Austritt aus der Staukammer eine Beschichtung auf, die nicht entfernt werden muss, sondern vielmehr als hochleistungsfähiger Schmierstofffilm für einen nachgeordneten Ziehprozess verwendbar ist. Dieser Schmierstofffilm besteht aus dem in der Druckkammer eingesetzten Festschmierstoff und darin eingebetteten Zunderteilchen. Die Zunderstaubteilchen verbessern in überraschender Weise ganz entscheidend die Druck- und Temperaturstabilität des Schmierstofffilms und schaffen die Voraussetzungen für eine wesentliche Verbesserung der Stabilität des nachgeordneten Ziehprozesses und der Qualität der hergestellten Produkte.The forming material has a coating on exit from the stagnation chamber which need not be removed, but rather is usable as a high performance lubricant film for a downstream drawing process. This lubricant film consists of the solid lubricant used in the pressure chamber and embedded therein Zunderteilchen. The Zunderstaubteilchen improve in a surprising way quite decisively the pressure and temperature stability of the lubricant film and create the conditions for a substantial improvement in the stability of the downstream drawing process and the quality of the products produced.

Erfindungsgemäß wird der in der Staukammer im Schmierstoff-Zunderteilchen-Gemisch herrschende Druck reguliert.According to the invention, the pressure prevailing in the storage chamber in the lubricant-scale particle mixture is regulated.

Zweckmäßigerweise wird eine Staukammer mit einer am Auslauf vorhandenen, die Dicke des auf dem auslaufenden Umformgut gewünschten Schmierstoff-Zunderteilchen-Films bestimmenden Öffnung verwendet. Für die Bestimmung der Dicke des auf dem auslaufenden Umformgut gewünschten Schmierstoff-Zunderteilchen-Films kann auch ein Ziehstein verwendet werden.Appropriately, a storage chamber is used with an existing at the outlet, the thickness of the desired on the expiring Umformgut desired lubricant-scale particle film opening. For the determination of the thickness of the desired on the expiring Umformgut lubricant Zunderteilchen film also a die can be used.

Zur Durchführung des Verfahrens beinhaltet die Erfindung eine an einer Ziehmaschine angeordnete Vorrichtung, enthaltend eine Einrichtung zur Umhüllung eines zunderbehafteten Umformgutes mit einem Festschmierstoff unter Druckeinwirkung und einen oder mehrere nachgeordneten Ziehsteine für eine Umformung des umhüllten Umformgutes mit einem Umformgrad ε von > 3% sowie eine nachgeordnete Staukammer zur Vermischung der infolge der Umformung aus der Zunderschicht entstandenen Zunderteilchen mit dem auf dem Umformgut nach dieser Umformung vorhandenen Schmierstoff.To carry out the method, the invention comprises a device arranged on a drawing machine, comprising means for enveloping a scale-bonded forming material with a solid lubricant under pressure and one or more downstream dies for forming the coated Umformgutes with a degree of deformation ε of> 3% and a downstream Stowing chamber for mixing the resulting from forming the scale layer Zunderteilchen with the present on the Umformgut after this transformation lubricant.

Die Einrichtung zur Umhüllung des zunderbehafteten Umformgutes mit einem Festschmierstoff und zur Umformung mit einem Umformgrad ε von > 3% ist erfindungsgemäß eine schmiermittelgefüllte Druckkammer.The device for wrapping the scale-bonded forming material with a solid lubricant and for forming with a degree of deformation ε of> 3% according to the invention is a lubricant-filled pressure chamber.

Die Staukammer zur Vermischung der infolge der Umformung aus der Zunderschicht entstandenen Zunderteilchen mit dem auf dem Umformgut nach der Umformung vorhandenen Schmierstoff weist erfindungsgemäß einen in Durchzugsrichtung zylindrisch oder konisch verlaufendem Innendurchmesser auf, wobei der Innendurchmesser der zylindrisch verlaufenden Staukammer > 0,02 mm größer bemessen ist, als der Durchmesser des Umformgutes.According to the invention, the stagnation chamber for mixing the scale particles formed as a result of forming from the scale layer with the lubricant present on the material to be formed after forming has a cylindrical diameter or conical inner diameter, wherein the inside diameter of the cylindrical stowage chamber is greater than 0.02 mm , than the diameter of the formed material.

Die Staukammer weist an ihrem Ende eine die Dicke des auf dem auslaufenden Umformgut gewünschten Schmierstoff-Zunderteilchen-Films bestimmende Öffnung auf. Diese Öffnung kann zweckmäßigerweise durch einen Ziehstein mit entsprechenden Abmessungen realisiert sein.At its end, the stowage chamber has an opening which determines the thickness of the lubricant-scale particle film desired on the outgoing material to be formed. This opening can be conveniently realized by a die with appropriate dimensions.

Erfindungsgemäß kann an der Staukammer eine Einrichtung zur Regulierung des in der Staukammer herrschenden Schmierstoffdrucks angeordnet sein.According to the invention, a device for regulating the lubricant pressure prevailing in the stagnation chamber can be arranged on the stagnation chamber.

Die Erfindung beinhaltet in ihrem Kern eine Kombination technischer Maßnahmen zur Reinigungsvorbehandlung von zunderbehaftetem Umformgut mit technischen Maßnahmen zur Beschichtung von derartigem Umformgut für eine nachgeordnete Umformung. Mit der Kombination werden vorteilhafte synergetische Effekte erreicht, indem bei zunderbehaftetem Umformgut völlig auf einen separaten Reinigungsprozess zum Entfernen des Zunders verzichtet werden kann und gleichzeitig eine Schmierstoffbeschichtung erzielt wird, die infolge ihrer hohen Druck- und Temperaturbeständigkeit besonders leistungsfähige Umformprozesse ermöglicht.The invention includes in its core a combination of technical measures for cleaning pretreatment of scale-shaped forming material with technical measures for coating such Umformgut for downstream forming. With the combination, advantageous synergistic effects are achieved by completely dispensing with a separate cleaning process for removal of the scale in the case of scale-bonded forming material and at the same time achieving a lubricant coating which, owing to its high pressure and temperature resistance, enables particularly efficient forming processes.

Nachstehend ist die Erfindung an Hand eines Ausführungsbeispiels und einer zugehörigen Zeichnung näher erläutert.The invention with reference to an embodiment and an accompanying drawing is explained in more detail.

Die in der Zeichnung gezeigte Vorrichtung zum Beschichten eines zunderbehafteten Umformgutes 1 enthält eine (nur teilweise dargestellte) Druckkammer 2, welche mit einem Festschmierstoff 3 gefüllt ist, der unter einem Druck P steht. Die Vorrichtung ist an einer in der Zeichnung nicht dargestellten Ziehmaschine vor den der Umformung dienenden Ziehstufen angeordnet. Das Umformgut 1 wird in der Ziehrichtung Z durch die Vorrichtung gezogen. Am Ausgang der Druckkammer 2 ist ein Ziehstein 4 angeordnet, mit dem das Umformgut 1 mit einem Umformgrad ε = 5% umgeformt wird. Dabei wird der auf dem Umformgut 1 befindliche Zunderbelag 5 in kleine Zunderteilchen zerkleinert und von der metallischen Matrix des Umformgutes gelöst. Die Zunderteilchen werden zusammen mit dem Schmierstoff auf dem Umformgut 1 in das nachfolgend angeordnete Staukammerelement 6 transportiert, das einen zylindrisch verlaufenden Durchzugskanal 7 aufweist, dessen Innendurchmesser 0,04 mm größer ist, als der Außendurchmesser des Umformgutes.
Im Durchzugskanal 7 des Staukammerelementes 6 kommt es zu einer intensiven Vermischung der Zunderteilchen mit dem Schmierstoff.The apparatus shown in the drawing for coating a scale-bearing forming material 1 contains a (only partially shown) pressure chamber 2, which with a solid lubricant 3 is filled, which is under a pressure P. The device is arranged on a drawing machine, not shown in the drawing before the forming stages serving forming. The forming material 1 is pulled in the pulling direction Z by the device. At the output of the pressure chamber 2, a die 4 is arranged, with which the material to be formed 1 with a degree of deformation ε = 5% is formed. Here, the Zunderbelag 5 located on the forming material 1 is crushed into small scale particles and released from the metallic matrix of the material to be formed. The tinder particles are transported together with the lubricant on the Umformgut 1 in the subsequently arranged stowage chamber element 6, which has a cylindrical passage channel 7 whose inner diameter is 0.04 mm larger than the outer diameter of the Umformgutes.
In the passage channel 7 of the storage chamber element 6, there is an intensive mixing of the scale particles with the lubricant.

Am Ausgang des Durchzugskanals 7 ist noch ein Ziehstein 8 angeordnet, der mit seiner Austrittsöffnung zur Festlegung der Beschichtungsdicke des Schmierstoff-Zunderteilchen-Films auf dem Umformgut 1 dient.At the exit of the passage channel 7 is still a die 8 is arranged, which serves with its outlet opening for determining the coating thickness of the lubricant Zunderteilchen film on the Umformgut 1.

Das Umformgut 1 weist bei seinem Austritt aus dem Ziehstein 8 eine Beschichtung 9 auf, die nicht entfernt werden muss, sondern vielmehr als hochleistungsfähiger Schmierstofffilm für einen nachgeordneten Ziehprozess verwendbar ist. Dieser Schmierstofffilm besteht aus dem in der Druckkammer eingesetzten Festschmierstoff und darin eingebetteten Zunderteilchen. Die Zunderteilchen verbessern in überraschender Weise ganz entscheidend die Druck- und Temperaturstabilität des Schmierstofffilms und schaffen die Voraussetzungen für eine wesentliche Verbesserung der Stabilität des nachgeordneten Umformprozesses und der Qualität der hergestellten Produkte.The forming material 1, at its exit from the die 8, a coating 9, which does not need to be removed, but rather as a high-performance lubricant film for a downstream drawing process is used. This lubricant film consists of the solid lubricant used in the pressure chamber and embedded therein Zunderteilchen. The scale particles improve in a surprising manner quite decisively the pressure and temperature stability of the lubricant film and create the conditions for a substantial improvement in the stability of the downstream forming process and the quality of the products produced.

Claims (13)

  1. Method for coating scaled metallic extruded deformation product (1) with a lubricant (3) for deformation in a subsequent drawing process, characterized in that the scaled deformation product (1) is encapsulated, prior to the subsequent drawing process, with a solid lubricant (3) and is deformed with a degree of deformation ε of > 3%, and is then drawn through at least one residence chamber (6) for the purpose of mixing the scale particles, produced from the scale layer as a consequence of the deformation, with the lubricant that is present on the deformation product after this deformation.
  2. Method according to Claim 1, characterized in that, for the purpose of encapsulation with the lubricant and for deformation with a degree of deformation ε of > 3%, the scaled deformation product is drawn through a lubricant-filled pressure chamber.
  3. Method according to Claim 1, characterized in that, for the purpose of mixing the scale particles, produced from the scale layer as a consequence of the deformation, with the lubricant that is present on the deformation product, the deformation product is drawn through a residence chamber with an internal diameter that is cylindrical or conical in the drawing direction.
  4. Method according to Claim 3, characterized in that use is made of a residence chamber having, at the outlet, an opening which determines the thickness of the desired lubricant-scale particle film on the outgoing deformation product.
  5. Method according to Claim 3, characterized in that use is made of a residence chamber having, at the outlet, a die which determines the thickness of the desired lubricant-scale particle film on the outgoing deformation product.
  6. Method according to Claim 1, characterized in that the pressure prevailing in the lubricant-scale particle mixture in the residence chamber is regulated.
  7. Device for coating scaled metallic extruded deformation product (1) with a lubricant (3) for deformation in a subsequent drawing process, characterized in that it comprises the following: on a drawing machine, a device for encapsulating a scaled deformation product (1) with a solid lubricant (3) under the action of pressure, and one or more subsequent dies (4) for deforming the encapsulated deformation product with a degree of deformation ε of > 3%, and a subsequent residence chamber (6) for the purpose of mixing the scale particles, produced from the scale layer as a consequence of the deformation, with the lubricant that is present on the deformation product (1) after this deformation.
  8. Device according to Claim 7, characterized in that, for the purpose of encapsulating the scaled deformation product with a solid lubricant, and for deformation with a degree of deformation ε of > 3%, the device is a lubricant-filled pressure chamber.
  9. Device according to Claim 7, characterized in that, for the purpose of mixing the scale particles, produced from the scale layer as a consequence of the deformation, with the lubricant that is present on the deformation product after deformation, the residence chamber has an internal diameter that is cylindrical or conical in the drawing direction.
  10. Device according to Claim 7, characterized in that the internal diameter of the cylindrical residence chamber is > 0.02 mm larger than the diameter of the deformation product.
  11. Device according to Claim 7, characterized in that the residence chamber has, at its end, an opening which determines the thickness of the desired lubricant-scale particle film on the outgoing deformation product.
  12. Device according to Claim 7, characterized in that the residence chamber has, at its end, a die which determines the thickness of the desired lubricant-scale particle film on the outgoing deformation product.
  13. Device according to Claim 7, characterized in that there is arranged, on the residence chamber, a device for regulating the lubricant pressure prevailing in the residence chamber.
EP14741823.0A 2013-07-05 2014-07-02 Method and device for coating scaled forming products with a lubricant Not-in-force EP3016755B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013213251.4A DE102013213251B4 (en) 2013-07-05 2013-07-05 Method and device for coating scale-bearing formed material with a lubricant
PCT/EP2014/064048 WO2015000951A2 (en) 2013-07-05 2014-07-02 Method and device for coating scaled forming products with a lubricant

Publications (2)

Publication Number Publication Date
EP3016755A2 EP3016755A2 (en) 2016-05-11
EP3016755B1 true EP3016755B1 (en) 2017-07-19

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Application Number Title Priority Date Filing Date
EP14741823.0A Not-in-force EP3016755B1 (en) 2013-07-05 2014-07-02 Method and device for coating scaled forming products with a lubricant

Country Status (6)

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US (1) US20160303628A1 (en)
EP (1) EP3016755B1 (en)
CN (1) CN105431239B (en)
DE (1) DE102013213251B4 (en)
RU (1) RU2667190C2 (en)
WO (1) WO2015000951A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109513767A (en) * 2018-11-27 2019-03-26 宁波市铭宏国光化工有限公司 A kind of metal wire rod drawing process and wire-drawing equipment

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BG41686A1 (en) * 1984-12-17 1987-08-14 Petkov Device for drawing of wire
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JPS6483316A (en) * 1987-09-25 1989-03-29 Sumitomo Metal Ind Cold drawing method for steel stock
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DE19817088C2 (en) * 1998-04-17 2000-02-17 Ecoform Umformtechnik Gmbh Method and device for coating and shaping strand-shaped metal material by drawing
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EP2219193A4 (en) * 2007-11-01 2012-07-04 Furukawa Electric Co Ltd Conductor material for electronic device and electric wire for wiring using the same

Also Published As

Publication number Publication date
US20160303628A1 (en) 2016-10-20
WO2015000951A2 (en) 2015-01-08
DE102013213251A1 (en) 2015-01-08
RU2016103741A (en) 2017-08-10
RU2667190C2 (en) 2018-09-17
WO2015000951A3 (en) 2015-02-26
EP3016755A2 (en) 2016-05-11
DE102013213251B4 (en) 2016-09-29
CN105431239A (en) 2016-03-23
CN105431239B (en) 2018-03-06

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