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EP2676745A1 - Device for coating a workpiece - Google Patents

Device for coating a workpiece Download PDF

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Publication number
EP2676745A1
EP2676745A1 EP13170216.9A EP13170216A EP2676745A1 EP 2676745 A1 EP2676745 A1 EP 2676745A1 EP 13170216 A EP13170216 A EP 13170216A EP 2676745 A1 EP2676745 A1 EP 2676745A1
Authority
EP
European Patent Office
Prior art keywords
tool
drive shaft
axial
cylindrical mating
mating surfaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13170216.9A
Other languages
German (de)
French (fr)
Other versions
EP2676745B8 (en
EP2676745B1 (en
Inventor
Michael Esposito
Aljoscha Langenohl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Meer GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Meer GmbH filed Critical SMS Meer GmbH
Publication of EP2676745A1 publication Critical patent/EP2676745A1/en
Application granted granted Critical
Publication of EP2676745B1 publication Critical patent/EP2676745B1/en
Publication of EP2676745B8 publication Critical patent/EP2676745B8/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • B21B35/141—Rigid spindle couplings, e.g. coupling boxes placed on roll necks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/005—Cantilevered roll stands

Definitions

  • the invention relates to a device for forming a workpiece, comprising a drive shaft rotatable about a rotation axis and a tool attached thereto, in particular a roller, wherein a positive connection, in particular a splined connection, between the drive shaft and the tool is present, with a torque can be transmitted from the drive shaft to the tool.
  • connection between the drive shaft and the roller is currently produced by a toothed fit.
  • the rolling forces and moments are transmitted over a small space.
  • a quick and easy roll change is of great importance, so that a high efficiency of processing can be ensured.
  • the use of splined shaft connections has proven very successful in this context.
  • the invention is therefore the object of a device of the type mentioned in such a way that this remedy is created. It should therefore be achieved that the wear of the connection between the drive shaft and roller is substantially reduced, which should result in an increase in service life of the device in order to reduce the operating costs accordingly.
  • the solution of this object by the invention is characterized in that the positive connection, in particular the splined shaft, extends over a first axial portion, wherein outside the first axial portion, a second axial portion is present, in which the drive shaft and the tool having cooperating first cylindrical mating surfaces adapted to transmit radial forces.
  • the positive connection is preferably arranged at a radial distance from the axis of rotation, which is smaller than the radial distance of the first cylindrical mating surfaces of the axis of rotation.
  • a third axial portion may be present in which the drive shaft and the tool have cooperating second cylindrical mating surfaces configured to transmit radial forces. It is preferably provided that the first axial portion between the second axial portion and the third axial portion is arranged.
  • lubricant may be introduced in order to optimally supply the toothed shaft connection with lubricant.
  • the second cylindrical mating surface of the tool can be formed by a sleeve which is arranged in the tool.
  • the sleeve is preferably arranged with a press fit in a bore of the tool. Said interference fit is preferably produced by shrinking.
  • the positive connection is preferably arranged at a radial distance from the axis of rotation which is greater than the radial distance of the second cylindrical mating surfaces from the axis of rotation.
  • the positive connection, at least one of the first cylindrical mating surfaces or at least one of the second cylindrical mating surfaces are advantageously provided with a wear-resistant coating.
  • a tie rod may be screwed, which presses for the purpose of axial fixing of the tool on the drive shaft with a flange-like enlarged portion on a frontally arranged contact surface of the tool.
  • This end-side contact surface may in particular be an end face of the sleeve.
  • a number of screws, in particular grub screws, can be arranged in the flange-like enlarged section, which are screwed into threaded bores located in the flange-like enlarged section, wherein the screws have with their one axial end on the abutment surface of the tool, in particular on one end side of the sleeve. to press.
  • a rolling device for forming a rolling stock results in a very advantageous manner that the wear of the connection between the drive shaft and tool can be significantly reduced.
  • the functions of torque transmission on the one hand and the transmission of radial forces on the other hand is decoupled. By relieving radial forces, the toothed shaft connection is enabled to transmit high torques with much less wear and tear.
  • the equipment with wear-resistant surface coatings and the use of optimal lubricants promote the reduction of wear.
  • a backlash-free axial attachment is further provided, which equally ensures that the wear of the device is minimized.
  • the proposed tool is used in particular in the hot forming, since here the benefits mentioned in a special way.
  • the proposal according to the invention permits transmission of the transverse forces (that is to say the radial forces) via now separate mating surfaces.
  • the axial forces are transmitted in isolation from this via the tie rod (threaded bolt).
  • the transmission of the torque between the drive shaft and roller takes place exclusively by the toothed shaft connection, which, however, according to the invention must transmit only the torques and is kept free of other forces, in particular radial forces, which leads to the desired significant increase in service life.
  • the lubrication of the device is also a not insignificant aspect.
  • FIG. 1 An embodiment of the invention is shown.
  • the single figure shows in partial radial section a device for forming a workpiece with a drive shaft and a roller attached thereto.
  • a device 1 for forming a (not shown) workpiece or rolling stock is shown.
  • the device 1 comprises a drive shaft 2 which is rotatable about a rotation axis a.
  • a tool 3 is fixed in the form of a roller.
  • the attachment is made detachable, so that the roller can be removed from the drive shaft 2 and replaced by another.
  • connection between the drive shaft 2 and roller 3 is designed so that both torques from the drive shaft 2 to the roller 3, as well as with respect to the axis of rotation a radial and axial forces can be transmitted.
  • said connection is designed so that once torques about the axis of rotation a, then radial forces between the drive shaft 2 and the roller 3 and finally axial forces between the drive shaft 2 and the roller 3 can be transmitted separately and isolated from each other.
  • a positive connection 4 in the form of a splined shaft connection.
  • the toothed shaft connection 4 extends over a first axial section 5, which is selected with respect to its extension so that the required torques can be transmitted reliably.
  • the spline connection is kept completely free of radial and axial forces.
  • the radial forces are transmitted via two other axial sections, namely via a second axial section 6 and a third axial section 9.
  • respective cylindrical mating surfaces are arranged on both the drive shaft 2 and the roller 3, which tolerates each other are, so that a defined transmission of radial forces is possible.
  • the drive shaft 2 in the second axial portion 6 a first cylindrical mating surface 7, which with a first cylindrical mating surface 8 of the tool. 3 interacts.
  • the drive shaft 2 in the third axial section 9 has a second cylindrical mating surface 10 which cooperates with a second cylindrical mating surface 11 of the tool 3.
  • the second cylindrical fitting surface 11 is formed by a sleeve 12, which is inserted in a bore 13 in the roller 2. More specifically, the sleeve 12 is fixed in the bore 13 by a thermal shrinking operation.
  • the transmission of axial forces finally takes place - again isolated from the torque transmission and from the transmission of radial forces - by a tie rod 15 which is screwed in a central thread 14 of the drive shaft 2 with a threaded portion.
  • the tie rod 15 has in its one axial end a flange-like enlarged portion 16 which is formed to abut against a frontally arranged contact surface 17 of the roller 3.
  • the frontal contact surface is formed by the one end face of the sleeve 12.
  • the flange-like enlarged portion 16 has a number of threaded holes on its circumference, are screwed into the grub screws 18. The screws are tightened until their one axial ends abut against the end face of the sleeve 12 with sufficient bias.
  • the radial distance r 1 of the toothed shaft connection 4 is smaller than the radial distance r 2 of the cylindrical first mating surfaces 7, 8 in the first axial section 5.
  • the radial distance r 1 of the spline connection 4 is greater than the radial distance r 3 of the cylindrical second fitting surfaces 10, 11 in the third axial section 5.
  • shrinking the sleeve 12 results in a problem-free way in the production of the tooth profile of the spline connection 4 in the roller 3.
  • the profile can namely made before shrinking the sleeve 12 in a simple manner, for. B. milled and ground, as is given without a sleeve 12, a free outlet for the necessary tool for this purpose. Subsequently, only the sleeve 12 is inserted (shrunk) and the roller 3 is thus put into the usable state.
  • All surfaces which are under load during operation of the device 1 can be coated so that long service lives can be achieved.
  • a lubricant may be introduced, so that the spline connection can operate under optimum lubrication conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Flexible Shafts (AREA)
  • Forging (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Umformen eines Werkstücks, umfassend eine um eine Drehachse drehbare Antriebswelle und ein an dieser befestigtes Werkzeug, insbesondere eine Walze, wobei eine formschlüssige Verbindung, insbesondere eine Zahnwellenverbindung, zwischen der Antriebswelle und dem Werkzeug vorhanden ist, mit der ein Drehmoment von der Antriebswelle auf das Werkzeug übertragen werden kann.The invention relates to a device for forming a workpiece, comprising a drive shaft rotatable about a rotation axis and a tool attached thereto, in particular a roller, wherein a positive connection, in particular a splined connection, between the drive shaft and the tool is present, with a torque can be transmitted from the drive shaft to the tool.

Bei Vorrichtungen dieser Art geht es darum, ein Werkzeug, namentlich eine Walze, an einer Antriebswelle lösbar festzulegen. Während der Benutzung muss ein hohes Drehmoment von der Antriebswelle auf die Walze übertragen werden. Bekannt ist es hierbei, eine Zahnwellenverbindung zwischen Antriebswelle und Walze einzusetzen. Derartige Zahnwellenverbindungen sind im Maschinenbau hinlänglich bekannt und gebräuchlich. Es wird auf die Normen DIN 5480 und DIN 5466 hingewiesen, die über den Aufbau dieser formschlüssigen Verbindungen Aufschluss geben.In devices of this kind is about a tool, namely a roller, releasably secured to a drive shaft. During use, a high torque must be transferred from the drive shaft to the roller. It is known here to use a spline connection between the drive shaft and roller. Such splined connections are well known and used in mechanical engineering. Attention is drawn to the standards DIN 5480 and DIN 5466, which provide information on the structure of these positive connections.

Beim Einsatz einer Zahnwellenverbindung zwischen der Antriebswelle und der Walze ergibt sich in vorteilhafter Weise, dass einerseits eine Drehmomentübertragung möglich ist, dass andererseits die Zahnwellenverbindung aufgrund ihrer Konzeption aber auch radiale Kräfte übertragen kann, was vorliegend beim Walzen eines Werkstücks sehr wesentlich ist.When using a spline connection between the drive shaft and the roller results in an advantageous manner, on the one hand, a torque transmission is possible, on the other hand, the spline connection due But their conception can also transmit radial forces, which is very essential in the present case when rolling a workpiece.

Im Falle eines Umformwerkzeugs der gattungsgemäßen Art wird derzeit also die Verbindung zwischen Antriebswelle und Walze per Passverzahnung hergestellt. Die Walzkräfte und -momente werden über einen kleinen Bauraum übertragen. Darüber hinaus kommt einem schnellen und einfachen Walzenwechsel eine hohe Bedeutung zu, damit eine hohe Wirtschaftlichkeit der Bearbeitung sichergestellt werden kann. Der Einsatz von Zahnwellenverbindungen hat sich in diesem Zusammenhang sehr bewährt.In the case of a forming tool of the generic type, therefore, the connection between the drive shaft and the roller is currently produced by a toothed fit. The rolling forces and moments are transmitted over a small space. In addition, a quick and easy roll change is of great importance, so that a high efficiency of processing can be ensured. The use of splined shaft connections has proven very successful in this context.

Nachteilig ist indes, dass beim genannten Anwendungsfall der Verbindung einer Walze auf einer Antriebswelle ein hoher Verschleiß der Verbindung vorliegt, so dass nach gewissen Standzeiten Bauteile ausgewechselt werden müssen, um die Übertragung radialer Kräfte und von Drehmomenten zuverlässig bewerkstelligen zu können. Es müssen nämlich auf relativ engem Bauraum sowohl die radialen Kräfte als auch die Drehmomente übertragen werden, was hinsichtlich der Verschleißanfälligkeit entsprechende Probleme bereitet.The disadvantage, however, is that in the case of the application of the compound of a roller on a drive shaft high wear of the connection is present, so that after certain periods components must be replaced in order to accomplish the transmission of radial forces and torque reliable. Namely, both the radial forces and the torques must be transmitted in a relatively small space, which causes corresponding problems in terms of susceptibility to wear.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so fortzubilden, dass diesbezüglich Abhilfe geschaffen wird. Es soll also erreicht werden, dass der Verschleiß der Verbindung zwischen Antriebswelle und Walze wesentlich reduziert wird, wodurch sich eine Standzeiterhöhung der Vorrichtung ergeben soll, um die Betriebskosten entsprechend zu vermindern.The invention is therefore the object of a device of the type mentioned in such a way that this remedy is created. It should therefore be achieved that the wear of the connection between the drive shaft and roller is substantially reduced, which should result in an increase in service life of the device in order to reduce the operating costs accordingly.

Die Lösung dieser Aufgabe durch die Erfindung ist dadurch gekennzeichnet, dass sich die formschlüssige Verbindung, insbesondere die Zahnwellenverbindung, über einen ersten axialen Abschnitt erstreckt, wobei außerhalb des ersten axialen Abschnitts ein zweiter axialer Abschnitt vorhanden ist, in dem die Antriebswelle und das Werkzeug zusammenwirkende erste zylindrische Passflächen aufweisen, die zur Übertragung radialer Kräfte ausgebildet sind.The solution of this object by the invention is characterized in that the positive connection, in particular the splined shaft, extends over a first axial portion, wherein outside the first axial portion, a second axial portion is present, in which the drive shaft and the tool having cooperating first cylindrical mating surfaces adapted to transmit radial forces.

Hierdurch wird die Zahnwellenverbindung von radialen Kräften entlastet; sie muss nunmehr ausschließlich Drehmomente übertragen.As a result, the spline connection is relieved of radial forces; It now only has to transmit torques.

Die formschlüssige Verbindung ist dabei vorzugsweise in einem radialen Abstand von der Drehachse angeordnet, der kleiner ist als der radiale Abstand der ersten zylindrischen Passflächen von der Drehachse.The positive connection is preferably arranged at a radial distance from the axis of rotation, which is smaller than the radial distance of the first cylindrical mating surfaces of the axis of rotation.

Außerhalb des ersten axialen Abschnitts und außerhalb des zweiten axialen Abschnitts kann in sehr bevorzugter Weise ein dritter axialer Abschnitt vorhanden sein, in dem die Antriebswelle und das Werkzeug zusammenwirkende zweite zylindrische Passflächen aufweisen, die zur Übertragung radialer Kräfte ausgebildet sind. Dabei ist bevorzugt vorgesehen, dass der erste axiale Abschnitt zwischen dem zweiten axialen Abschnitt und dem dritten axialen Abschnitt angeordnet ist. In vorteilhafter Weise kann in den sich zwischen dem zweiten und dritten axialen Abschnitt befindlichen Raum, in dem sich der erste axiale Abschnitt mit der Zahnwellenverbindung befindet, Schmiermittel eingebracht sein, um die Zahnwellenverbindung optimal mit Schmierstoff zu versorgen.Outside the first axial portion and outside the second axial portion, most preferably a third axial portion may be present in which the drive shaft and the tool have cooperating second cylindrical mating surfaces configured to transmit radial forces. It is preferably provided that the first axial portion between the second axial portion and the third axial portion is arranged. Advantageously, in the space between the second and third axial section, in which the first axial section with the toothed shaft connection is located, lubricant may be introduced in order to optimally supply the toothed shaft connection with lubricant.

Die zweite zylindrische Passfläche des Werkzeugs kann durch eine Hülse gebildet werden, die im Werkzeug angeordnet ist. Die Hülse ist dabei bevorzugt mit Presspassung in einer Bohrung des Werkzeugs angeordnet. Besagte Presspassung wird bevorzugt durch Einschrumpfen hergestellt.The second cylindrical mating surface of the tool can be formed by a sleeve which is arranged in the tool. The sleeve is preferably arranged with a press fit in a bore of the tool. Said interference fit is preferably produced by shrinking.

Die formschlüssige Verbindung ist bevorzugt in einem radialen Abstand von der Drehachse angeordnet, der größer ist als der radiale Abstand der zweiten zylindrischen Passflächen von der Drehachse. Die Montage und Demontage wird hierdurch in einfacher Weise möglich.The positive connection is preferably arranged at a radial distance from the axis of rotation which is greater than the radial distance of the second cylindrical mating surfaces from the axis of rotation. The assembly and disassembly is thereby possible in a simple manner.

Die formschlüssige Verbindung, mindestens eine der ersten zylindrischen Passflächen bzw. mindestens eine der zweiten zylindrischen Passflächen sind mit Vorteil mit einer verschleißfesten Beschichtung versehen.The positive connection, at least one of the first cylindrical mating surfaces or at least one of the second cylindrical mating surfaces are advantageously provided with a wear-resistant coating.

In einem Zentralgewinde der Antriebswelle kann ein Zuganker eingeschraubt sein, der zwecks axialer Festlegung des Werkzeugs an der Antriebswelle mit einem flanschartig vergrößerten Abschnitt auf eine stirnseitig angeordnete Anlagefläche des Werkzeugs drückt. Diese stirnseitige Anlagefläche kann insbesondere eine Stirnseite der Hülse sein. Im flanschartig vergrößerten Abschnitt kann eine Anzahl Schrauben, insbesondere Madenschrauben, angeordnet sein, die in sich im flanschartig vergrößerten Abschnitt befindlichen Gewindebohrungen eingeschraubt sind, wobei die Schrauben mit ihrem einen axialen Ende auf die stirnseitig angeordnete Anlagefläche des Werkzeugs, insbesondere auf eine Stirnseite der Hülse, drücken.In a central thread of the drive shaft, a tie rod may be screwed, which presses for the purpose of axial fixing of the tool on the drive shaft with a flange-like enlarged portion on a frontally arranged contact surface of the tool. This end-side contact surface may in particular be an end face of the sleeve. A number of screws, in particular grub screws, can be arranged in the flange-like enlarged section, which are screwed into threaded bores located in the flange-like enlarged section, wherein the screws have with their one axial end on the abutment surface of the tool, in particular on one end side of the sleeve. to press.

Mit der vorgeschlagenen Ausgestaltung einer Walzvorrichtung zum Umformen eines Walzguts ergibt sich in sehr vorteilhafter Weise, dass der Verschleiß der Verbindung zwischen Antriebswelle und Werkzeug wesentlich herabgesetzt werden kann. Die Funktionen der Drehmomentübertragung einerseits und der Übertragung radialer Kräfte andererseits ist entkoppelt. Durch die Entlastung von radialen Kräften wird die Zahnwellenverbindung in den Stand gesetzt, mit wesentlich geringerem Verschleiß auch hohe Drehmomente übertragen zu können.With the proposed embodiment of a rolling device for forming a rolling stock results in a very advantageous manner that the wear of the connection between the drive shaft and tool can be significantly reduced. The functions of torque transmission on the one hand and the transmission of radial forces on the other hand is decoupled. By relieving radial forces, the toothed shaft connection is enabled to transmit high torques with much less wear and tear.

Die Ausstattung mit verschleißfesten Oberflächenbeschichtungen und der Einsatz optimaler Schmiermittel begünstigen die Reduzierung des Verschleißes. Vorteilhaft ist weiter eine spielfreie axiale Befestigung vorgesehen, die gleichermaßen dafür Sorge trägt, dass der Verschleiß der Vorrichtung minimiert wird.The equipment with wear-resistant surface coatings and the use of optimal lubricants promote the reduction of wear. Advantageously, a backlash-free axial attachment is further provided, which equally ensures that the wear of the device is minimized.

Somit ergibt sich eine deutliche Reduzierung des Verschleißes und damit eine signifikante Lebensdauererhöhung bzw. Erhöhung der Standzeit der Vorrichtung bzw. deren Teile.This results in a significant reduction of wear and thus a significant increase in service life and increase the service life of the device or its parts.

Das vorgeschlagene Werkzeug wird insbesondere in der Warmumformung eingesetzt, da sich hier die genannten Vorteile in besonderer Weise auswirken.The proposed tool is used in particular in the hot forming, since here the benefits mentioned in a special way.

Der erfindungsgemäße Vorschlag erlaubt eine Übertragung der Querkräfte (d. h. der radialen Kräfte) über nunmehr separate Passflächen. Die Axialkräfte werden isoliert hiervon über den Zuganker (Gewindebolzen) übertragen. Indes erfolgt die Übertragung des Drehmoments zwischen Antriebswelle und Walze ausschließlich durch die Zahnwellenverbindung, die allerdings erfindungsgemäß ausschließlich die Drehmomente übertragen muss und von anderen Kräften, insbesondere von radialen Kräften freigehalten wird, was zu der angestrebten deutlichen Erhöhung der Standzeiten führt.The proposal according to the invention permits transmission of the transverse forces (that is to say the radial forces) via now separate mating surfaces. The axial forces are transmitted in isolation from this via the tie rod (threaded bolt). However, the transmission of the torque between the drive shaft and roller takes place exclusively by the toothed shaft connection, which, however, according to the invention must transmit only the torques and is kept free of other forces, in particular radial forces, which leads to the desired significant increase in service life.

Der Schmierung der Vorrichtung kommt auch ein nicht unwesentlicher Aspekt zu. Durch die Wahl eines geeigneten Schmierstoffs - insbesondere in Verbindung mit einer Oberflächenbeschichtung der hochbelasteten Bereiche der Vorrichtung - kann der Verschleiß weiter in erheblichem Maße verringert werden.The lubrication of the device is also a not insignificant aspect. By choosing a suitable lubricant - especially in conjunction with a surface coating of the highly loaded areas of the device - the wear can be further reduced significantly.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die einzige Figur zeigt im teilweisen Radialschnitt eine Vorrichtung zum Umformen eines Werkstücks mit einer Antriebswelle und einem an dieser befestigten Walze.In the drawing, an embodiment of the invention is shown. The single figure shows in partial radial section a device for forming a workpiece with a drive shaft and a roller attached thereto.

In der Figur ist eine Vorrichtung 1 zum Umformen eines (nicht dargestellten) Werkstücks bzw. Walzguts dargestellt. Die Vorrichtung 1 umfasst eine Antriebswelle 2, die um eine Drehachse a drehbar ist. Am axialen Ende der Antriebswelle 2 ist ein Werkzeug 3 in Form einer Walze befestigt. Die Befestigung ist lösbar ausgeführt, so dass die Walze von der Antriebswelle 2 entfernt und durch eine andere ersetzt werden kann.In the figure, a device 1 for forming a (not shown) workpiece or rolling stock is shown. The device 1 comprises a drive shaft 2 which is rotatable about a rotation axis a. At the axial end of the drive shaft 2, a tool 3 is fixed in the form of a roller. The attachment is made detachable, so that the roller can be removed from the drive shaft 2 and replaced by another.

Die Verbindung zwischen Antriebswelle 2 und Walze 3 ist so ausgeführt, dass sowohl Drehmomente von der Antriebswelle 2 auf die Walze 3, als auch bezüglich der Drehachse a radiale und axiale Kräfte übertragen werden können. Dabei ist besagte Verbindung so gestaltet, dass einmal Drehmomente um die Drehachse a, dann radiale Kräfte zwischen der Antriebswelle 2 und der Walze 3 und schließlich axiale Kräfte zwischen der Antriebswelle 2 und der Walze 3 jeweils separat und isoliert voneinander übertragen werden können.The connection between the drive shaft 2 and roller 3 is designed so that both torques from the drive shaft 2 to the roller 3, as well as with respect to the axis of rotation a radial and axial forces can be transmitted. In this case, said connection is designed so that once torques about the axis of rotation a, then radial forces between the drive shaft 2 and the roller 3 and finally axial forces between the drive shaft 2 and the roller 3 can be transmitted separately and isolated from each other.

Zur Übertragung eines Drehmoments weisen nämlich die Antriebswelle 2 und die Walze 3 eine formschlüssige Verbindung 4 in Form einer Zahnwellenverbindung auf. Die Zahnwellenverbindung 4 erstreckt sich dabei über einen ersten axialen Abschnitt 5, der hinsichtlich seiner Erstreckung so gewählt ist, dass die benötigten Drehmomente zuverlässig übertragen werden können. Die Zahnwellenverbindung ist dabei von radialen und axialen Kräften gänzlich frei gehalten.To transmit a torque, namely, the drive shaft 2 and the roller 3 on a positive connection 4 in the form of a splined shaft connection. The toothed shaft connection 4 extends over a first axial section 5, which is selected with respect to its extension so that the required torques can be transmitted reliably. The spline connection is kept completely free of radial and axial forces.

Die radialen Kräfte werden über zwei andere axiale Abschnitte übertragen, und zwar über einen zweiten axialen Abschnitt 6 und einen dritten axialen Abschnitt 9. In diesen beiden Abschnitten sind jeweilige zylindrische Passflächen sowohl an der Antriebswelle 2 als auch an der Walze 3 angeordnet, die zueinander toleriert sind, so dass eine definierte Übertragung radialer Kräfte möglich ist.The radial forces are transmitted via two other axial sections, namely via a second axial section 6 and a third axial section 9. In these two sections, respective cylindrical mating surfaces are arranged on both the drive shaft 2 and the roller 3, which tolerates each other are, so that a defined transmission of radial forces is possible.

So weist die Antriebswelle 2 im zweiten axialen Abschnitt 6 eine erste zylindrische Passfläche 7 auf, die mit einer ersten zylindrischen Passfläche 8 des Werkzeugs 3 zusammenwirkt. Indes weist die Antriebswelle 2 im dritten axialen Abschnitt 9 eine zweite zylindrische Passfläche 10 auf, die mit einer zweiten zylindrischen Passfläche 11 des Werkzeugs 3 zusammenwirkt.Thus, the drive shaft 2 in the second axial portion 6, a first cylindrical mating surface 7, which with a first cylindrical mating surface 8 of the tool. 3 interacts. Meanwhile, the drive shaft 2 in the third axial section 9 has a second cylindrical mating surface 10 which cooperates with a second cylindrical mating surface 11 of the tool 3.

Im Bereich des dritten axialen Abschnitts 9 ist zu erkennen, dass die zweite zylindrische Passfläche 11 durch eine Hülse 12 gebildet wird, die in einer Bohrung 13 in der Walze 2 eingesetzt ist. Genauer gesagt, ist die Hülse 12 in der Bohrung 13 durch einen thermischen Schrumpfvorgang fixiert.In the area of the third axial section 9, it can be seen that the second cylindrical fitting surface 11 is formed by a sleeve 12, which is inserted in a bore 13 in the roller 2. More specifically, the sleeve 12 is fixed in the bore 13 by a thermal shrinking operation.

Die Übertragung axialer Kräfte erfolgt schließlich - wiederum isoliert von der Drehmomentübertragung und von der Übertragung radialer Kräfte - durch einen Zuganker 15, der in einem Zentralgewinde 14 der Antriebswelle 2 mit einem Gewindeabschnitt eingeschraubt ist. Der Zuganker 15 hat in seinem einen axialen Ende einen flanschartig vergrößerten Abschnitt 16, der ausgebildet ist, an einer stirnseitig angeordneten Anlagefläche 17 der Walze 3 anzuliegen. Konkret wird die stirnseitige Anlagefläche durch die eine Stirnseite der Hülse 12 gebildet.The transmission of axial forces finally takes place - again isolated from the torque transmission and from the transmission of radial forces - by a tie rod 15 which is screwed in a central thread 14 of the drive shaft 2 with a threaded portion. The tie rod 15 has in its one axial end a flange-like enlarged portion 16 which is formed to abut against a frontally arranged contact surface 17 of the roller 3. Specifically, the frontal contact surface is formed by the one end face of the sleeve 12.

Um eine spielfreie axiale Festlegung der Walze 3 an der Antriebswelle 2 zu erreichen, weist der flanschartig vergrößerte Abschnitt 16 über seinem Umfang eine Anzahl Gewindebohrungen auf, in die Madenschrauben 18 eingeschraubt sind. Die Schrauben werden angezogen, bis ihre einen axialen Enden an der Stirnseite der Hülse 12 mit hinreichender Vorspannung anliegen.In order to achieve a play-free axial fixing of the roller 3 to the drive shaft 2, the flange-like enlarged portion 16 has a number of threaded holes on its circumference, are screwed into the grub screws 18. The screws are tightened until their one axial ends abut against the end face of the sleeve 12 with sufficient bias.

Wie weiter zu erkennen ist, ist der radiale Abstand r1 der Zahnwellenverbindung 4 kleiner als der radiale Abstand r2 der zylindrischen ersten Passflächen 7, 8 im ersten axialen Abschnitt 5.As can also be seen, the radial distance r 1 of the toothed shaft connection 4 is smaller than the radial distance r 2 of the cylindrical first mating surfaces 7, 8 in the first axial section 5.

Indes ist der radiale Abstand r1 der Zahnwellenverbindung 4 größer als der radiale Abstand r3 der zylindrischen zweiten Passflächen 10, 11 im dritten axialen Abschnitt 5.Meanwhile, the radial distance r 1 of the spline connection 4 is greater than the radial distance r 3 of the cylindrical second fitting surfaces 10, 11 in the third axial section 5.

Durch das Einschrumpfen der Hülse 12 ergibt sich eine problemfreie Möglichkeit bei der Fertigung des Zahnprofils der Zahnwellenverbindung 4 in der Walze 3. Das Profil kann nämlich vor dem Einschrumpfen der Hülse 12 in einfacher Weise hergestellt, z. B. gefräst und geschliffen, werden, da ohne Hülse 12 ein freier Auslauf für das hierfür nötige Werkzeug gegeben ist. Anschließend erst wird die Hülse 12 eingesetzt (eingeschrumpft) und die Walze 3 damit in den benutzungsfähigen Zustand versetzt.By shrinking the sleeve 12 results in a problem-free way in the production of the tooth profile of the spline connection 4 in the roller 3. The profile can namely made before shrinking the sleeve 12 in a simple manner, for. B. milled and ground, as is given without a sleeve 12, a free outlet for the necessary tool for this purpose. Subsequently, only the sleeve 12 is inserted (shrunk) and the roller 3 is thus put into the usable state.

Alle sich im Betrieb der Vorrichtung 1 unter Last befindlichen Flächen können beschichtet werden, so dass lange Standzeiten erreicht werden können. In den Raum zwischen dem zweiten axialen Abschnitt 6 und dem dritten axialen Abschnitt 9 kann ein Schmiermittel eingebracht werden, so dass die Zahnwellenverbindung unter optimalen Schmierbedingungen arbeiten kann.All surfaces which are under load during operation of the device 1 can be coated so that long service lives can be achieved. In the space between the second axial portion 6 and the third axial portion 9, a lubricant may be introduced, so that the spline connection can operate under optimum lubrication conditions.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Vorrichtung zum Umformen eines WerkstücksDevice for forming a workpiece
22
Antriebswelledrive shaft
33
WerkzeugTool
44
formschlüssige Verbindung (Zahnwellenverbindung)positive connection (toothed shaft connection)
55
erster axialer Abschnittfirst axial section
66
zweiter axialer Abschnittsecond axial section
77
erste zylindrische Passfläche der Antriebswellefirst cylindrical mating surface of the drive shaft
88th
erste zylindrische Passfläche des Werkzeugsfirst cylindrical mating surface of the tool
99
dritter axialer Abschnittthird axial section
1010
zweite zylindrische Passfläche der Antriebswellesecond cylindrical mating surface of the drive shaft
1111
zweite zylindrische Passfläche des Werkzeugssecond cylindrical mating surface of the tool
1212
Hülseshell
1313
Bohrungdrilling
1414
Zentralgewindecentral thread
1515
Zugankertie rods
1616
flanschartig vergrößerter Abschnittflange enlarged section
1717
stirnseitig angeordnete Anlageflächefrontally arranged contact surface
1818
Schraubescrew
aa
Drehachseaxis of rotation
r1 r 1
radialer Abstandradial distance
r2 r 2
radialer Abstandradial distance
r3 r 3
radialer Abstandradial distance

Claims (10)

Vorrichtung (1) zum Umformen eines Werkstücks, umfassend eine um eine Drehachse (a) drehbare Antriebswelle (2) und ein an dieser befestigtes Werkzeug (3), insbesondere eine Walze, wobei eine formschlüssige Verbindung (4), insbesondere eine Zahnwellenverbindung, zwischen der Antriebswelle (2) und dem Werkzeug (3) vorhanden ist, mit der ein Drehmoment von der Antriebswelle (2) auf das Werkzeug (3) übertragen werden kann,
dadurch gekennzeichnet, dass
sich die formschlüssige Verbindung (4) über einen ersten axialen Abschnitt (5) erstreckt, wobei außerhalb des ersten axialen Abschnitts (5) ein zweiter axialer Abschnitt (6) vorhanden ist, in dem die Antriebswelle (2) und das Werkzeug (3) zusammenwirkende erste zylindrische Passflächen (7, 8) aufweisen, die zur Übertragung radialer Kräfte ausgebildet sind.Device (1) for forming a workpiece, comprising a drive shaft (2) rotatable about a rotation axis (a) and a tool (3) fastened thereto, in particular a roller, wherein a positive connection (4), in particular a toothed shaft connection, between the Drive shaft (2) and the tool (3) is provided with which a torque from the drive shaft (2) can be transmitted to the tool (3),
characterized in that
the positive connection (4) extends over a first axial section (5), outside of the first axial section (5) there being a second axial section (6) in which the drive shaft (2) and the tool (3) cooperate first cylindrical mating surfaces (7, 8) which are designed to transmit radial forces. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die formschlüssige Verbindung (4) in einem radialen Abstand (r1) von der Drehachse (a) angeordnet ist, der kleiner ist als der radiale Abstand (r2) der ersten zylindrischen Passflächen (7, 8) von der Drehachse (a).Apparatus according to claim 1, characterized in that the positive connection (4) is arranged at a radial distance (r 1 ) from the axis of rotation (a) which is smaller than the radial distance (r 2 ) of the first cylindrical mating surfaces (7, 8) from the axis of rotation (a). Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass außerhalb des ersten axialen Abschnitts (5) und außerhalb des zweiten axialen Abschnitts (6) ein dritter axialer Abschnitt (9) vorhanden ist, in dem die Antriebswelle (2) und das Werkzeug (3) zusammenwirkende zweite zylindrische Passflächen (10, 11) aufweisen, die zur Übertragung radialer Kräfte ausgebildet sind.Device according to one of claims 1 or 2, characterized in that outside the first axial section (5) and outside the second axial section (6) there is a third axial section (9) in which the drive shaft (2) and the tool (3) cooperating second cylindrical mating surfaces (10, 11) which are designed to transmit radial forces. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der erste axiale Abschnitt (5) zwischen dem zweiten axialen Abschnitt (6) und dem dritten axialen Abschnitt (9) angeordnet ist, wobei vorzugsweise Schmiermittel im Bereich zwischen dem zweiten axialen Abschnitt (6) und dem dritten axialen Abschnitt (9) eingebracht ist.Apparatus according to claim 3, characterized in that the first axial portion (5) between the second axial portion (6) and the third axial portion (9) is arranged, wherein preferably lubricant in the region between the second axial portion (6) and the third axial section (9) is introduced. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die zweite zylindrische Passfläche (11) des Werkzeugs durch eine Hülse (12) gebildet wird, die im Werkzeug (3) angeordnet ist.Apparatus according to claim 3 or 4, characterized in that the second cylindrical mating surface (11) of the tool by a sleeve (12) is formed, which is arranged in the tool (3). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Hülse (12) mit Presspassung in einer Bohrung (13) des Werkzeugs (3) sitzt, wobei die Presspassung insbesondere durch einen Schrumpfvorgang hergestellt ist.Apparatus according to claim 5, characterized in that the sleeve (12) with a press fit in a bore (13) of the tool (3) sits, wherein the press fit is made in particular by a shrinking process. Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass die formschlüssige Verbindung (4) in einem radialen Abstand (r1) von der Drehachse (a) angeordnet ist, der größer ist als der radiale Abstand (r3) der zweiten zylindrischen Passflächen (10, 11) von der Drehachse (a).Device according to one of claims 3 to 6, characterized in that the positive connection (4) at a radial distance (r 1 ) from the axis of rotation (a) is arranged, which is greater than the radial distance (r 3 ) of the second cylindrical Mating surfaces (10, 11) from the axis of rotation (a). Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die formschlüssige Verbindung (4) und/oder mindestens eine der ersten zylindrischen Passflächen (7, 8) und/oder mindestens eine der zweiten zylindrischen Passflächen (10, 11) mit einer verschleißfesten Beschichtung versehen sind.Device according to one of claims 1 to 7, characterized in that the positive connection (4) and / or at least one of the first cylindrical mating surfaces (7, 8) and / or at least one of the second cylindrical mating surfaces (10, 11) with a wear-resistant Coating are provided. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass in einem Zentralgewinde (14) der Antriebswelle (2) ein Zuganker (15) eingeschraubt ist, der zwecks axialer Festlegung des Werkzeugs (3) an der Antriebswelle (2) mit einem flanschartig vergrößerten Abschnitt (16) auf eine stirnseitig angeordnete Anlagefläche (17) des Werkzeugs (3), insbesondere auf eine Stirnseite der Hülse (12), drückt.Device according to one of claims 1 to 8, characterized in that in a central thread (14) of the drive shaft (2) a tie rod (15) is screwed, for the purpose of axial fixing of the tool (3) on the drive shaft (2) with a flange enlarged portion (16) on a frontally arranged contact surface (17) of the tool (3), in particular on an end face of the sleeve (12) presses. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass im flanschartig vergrößerten Abschnitt (16) eine Anzahl Schrauben (18), insbesondere Madenschrauben, angeordnet sind, die in sich im flanschartig vergrößerten Abschnitt (16) befindlichen Gewindebohrungen eingeschraubt sind, wobei die Schrauben (18) mit ihrem einen axialen Ende auf die stirnseitig angeordnete Anlagefläche (17) des Werkzeugs (3), insbesondere auf eine Stirnseite der Hülse (12), drücken.Apparatus according to claim 9, characterized in that a number of screws (18), in particular grub screw, are arranged in the flange-like enlarged section (16), which are screwed into threaded bores located in the flange-like enlarged section (16), wherein the screws (18) with its one axial end on the frontally arranged contact surface (17) of the tool (3), in particular on an end face of the sleeve (12), press.
EP13170216.9A 2012-06-20 2013-06-03 Device for coating a workpiece Active EP2676745B8 (en)

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JP (1) JP5892979B2 (en)
KR (1) KR101524531B1 (en)
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SI2740549T1 (en) * 2012-12-07 2016-08-31 Primetals Technologies Austria GmbH Pinch roller of a winding assembly of a rolling mill
GB2557609B (en) * 2016-12-12 2023-01-18 Pandrol Ltd A variable diameter fastener for a railway rail fastening assembly
CN109500094A (en) * 2018-12-12 2019-03-22 唐山钢铁集团有限责任公司 A kind of clutch for fashioned iron universal mill screw-down

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KR20130142901A (en) 2013-12-30
EP2676745B8 (en) 2016-09-28
JP2014000606A (en) 2014-01-09
RU2570255C2 (en) 2015-12-10
US9868141B2 (en) 2018-01-16
DE102012012293B4 (en) 2017-10-26
DE102012012293A1 (en) 2013-12-24
KR101524531B1 (en) 2015-06-01
JP5892979B2 (en) 2016-03-23
CN103511477A (en) 2014-01-15
ES2602294T3 (en) 2017-02-20
US20130343804A1 (en) 2013-12-26
CN103511477B (en) 2016-12-28
RU2013128244A (en) 2014-12-27
EP2676745B1 (en) 2016-08-10

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