EP1327707A1 - Basic body for the support disk of an OE-rotor bearing - Google Patents

Basic body for the support disk of an OE-rotor bearing Download PDF

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Publication number
EP1327707A1
EP1327707A1 EP02025442A EP02025442A EP1327707A1 EP 1327707 A1 EP1327707 A1 EP 1327707A1 EP 02025442 A EP02025442 A EP 02025442A EP 02025442 A EP02025442 A EP 02025442A EP 1327707 A1 EP1327707 A1 EP 1327707A1
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EP
European Patent Office
Prior art keywords
base body
body according
extrusion
hub
bore
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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
EP02025442A
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German (de)
French (fr)
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EP1327707B1 (en
Inventor
Edmund Schuller
Manfred Knabel
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
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Rieter Ingolstadt Spinnereimaschinenbau AG
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Publication of EP1327707A1 publication Critical patent/EP1327707A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/12—Rotor bearings; Arrangements for driving or stopping

Definitions

  • the present invention relates to a base body for a support disc for the storage of an open-end spinning rotor according to the preamble of the claim 1.
  • open-end spinning rotors are so-called indirect bearings used because the spinning rotors with much more operated at 100,000 revolutions per minute.
  • the indirect camp for the radial mounting of the spinning rotor consist of four support disks, which are arranged in pairs and each pair forms a wedge gap, the area of the rotor shaft end being accommodated in the first wedge gap while the area of the rotor shaft is supported in the other wedge gap that receives the rotor pot of the spinning rotor.
  • Form the support disks So on its peripheral surface the tread on which the spinning rotor its rotor shaft rolls.
  • This tread is made of a plastic, e.g. Polyurethane, or rubber.
  • the tread of a support disc is used for this purpose, for example Injection molding applied to the base body. Due to the ever increasing The speeds of the open-end spinning rotors also become the support disks operated at a higher speed, which leads in particular to the fact that the Tread is more heavily loaded and thus increases the risk that it detaches from the base body of the support disc. To prevent this, are profiles from the prior art on the outer circumference of the support disk base body known, in addition also partially holes be introduced in the axial direction or grooves or notches to better connect the tread to the base plate.
  • This configuration of the peripheral region of the support disk base body requires a high manufacturing effort, for example Holes are always drilled in an additional step have to be, while the base body otherwise, for example is made from a solid material by turning. It is also known Manufacture supporting disc base body by extrusion.
  • the disadvantage of the known support disk base body is that it only with large processing effort in sufficient quality may or may not have sufficient strength, so that mounting problems with the waves that carry them.
  • the object of the present invention is to provide a base body for a support disk propose the inexpensive and with few processing steps can be produced and at the same time has high strength, which allows it to be securely attached to an axis of a bearing.
  • This The object is achieved by a support disk with a base body solved according to the present invention. Because the main body is made by extrusion and one after extrusion Has been subjected to the hardening process, it is achieved that the base body is inexpensive is, and that its shape with sufficient accuracy of fit is producible and also has sufficient strength, which allows it to be stored by means of axes and during operation to keep its shape.
  • the base body is particularly advantageously made of an aluminum alloy, which contains magnesium and silicon, as these are particularly suitable is to be extruded into the desired shape and
  • this alloy can be particularly advantageous after the shape hardened particularly easily and with sufficient strength become.
  • the aluminum alloy contains copper, whereby is achieved that the base body with a particularly high strength can be manufactured.
  • a basic body is particularly favorable here is hardened cold, as this leads to particularly high strength.
  • the base body is warm cured, making it high strength and also low Has brittleness and therefore particularly good usage properties.
  • the base body at least partially has a strength of at least 220 N / mm 2 ensures that it can be reliably supported, for example, via a bore on an axis.
  • a base body with a strength of at least 250 N / mm 2 it is possible to insert an axis into a bore of the base body for storage, which advantageously has a relatively small diameter.
  • the base body is particularly favorable with a strength between 250 N / mm 2 and 350 N / mm 2 , because with such a base body high speeds can be reliably driven without problems with the connection between the base body and the axis supporting it.
  • the base body with the strength according to the invention is particularly favorable equipped at least in the area of his hub. Step in this area the greatest loads, especially by the storage means, so that in Area of the hub the strength is of particular importance.
  • the base body and the hub are formed in one piece, whereby the production is particularly simple and inexpensive.
  • the base body advantageously has a profile on its outer circumference, which is at least partially made by extrusion.
  • the profiling can be formed particularly inexpensively can and at the same time a shaping of the profiling can be made possible can be difficult to manufacture with other manufacturing processes is.
  • Undercuts on the profile can also be advantageous in particular by extrusion.
  • Through training of the base body by means of extrusion is achieved particularly advantageously, that the basic body, except for the processing that may be required the bore, can be made completely finished, which reduces the manufacturing cost lowers. Result from the symmetrical design of the profiling manufacturing advantages and the particular advantage that a subsequent set on the basic body evenly on Basic body can be determined.
  • the design of the profile with a radially arranged outside bell-shaped profile advantageously results in an easy extrusion Profile to be produced radially on the outer circumference of the base body at the same time is particularly cheap for setting a set and above also ensures that when applying a set the material thickness the set or the covering of the support disc, especially when designed with a groove always remains constant.
  • the design of a base body on the outer circumference is particularly favorable has openings in the axial direction caused by extrusion or are produced by stamping. This can be done easily A particularly advantageous base body can be produced on the a set, that is to say a tread, is particularly easily and securely fixed can be. These are openings in particular by punching particularly simple and inexpensive, even in a subsequent machining process, produced.
  • a base body for a Support disc this is provided with markings are produced by means of extrusion or punching. With the help of these markings it is particularly easy to increase the speed of the support disc detect how this is particularly the case in piecing processes known in the prior art is required. By marking, especially if this is designed as an opening through extrusion or punching a simple way is created, the speed to measure the support disc without taking any further measures must be made.
  • Two or three subordinate ones in time are particularly suitable for this purpose Processing stages, because this ensures reliable dimensional accuracy and at the same time solid and inexpensive basic bodies can be produced.
  • the basic body is also reworked by machining be, especially in the area of the hole, so that after extrusion the bore for receiving an axis, in particular, with very narrow Tolerances can be produced.
  • the base body according to the invention between 55 mm and 80 mm in diameter, preferably between 60 mm and 75 mm, it is achieved that the hub on the base body in sufficient size can be produced and in particular that sufficient deformation takes place during extrusion, so that a distortion is largely prevented.
  • this an outer diameter, which is in relation to the diameter of the Bore of the hub is between 1.6 and 2.5, particularly favorable between 1.8 and 2.3. This advantageously ensures that the hub is in position sufficient force is to be exerted when it is pressed onto a shaft, which is a safe Define a support disc with its base body on an axis guaranteed.
  • the advantageous design of the marking as an opening enables save additional components for marking the support disc and thereby train them inexpensively. It is advantageous when used several breakthroughs made sure that these preferably over 180 ° are arranged on the support disc or distributed around its axis.
  • FIG. 1 shows a perspective view of an inventive Base body 1 for a support disc for mounting an open-end spinning rotor.
  • the base body 1 has a hub 2, with a bore 21, in which with the help of a press fit of the base body 1 of a support disc in the operating case is attached to an axis, which in turn in bearings, for example Rolling bearings, is stored.
  • This has on the outer circumference of the base body a profiling 3 with the help of a clothing covering on the base body 1 (Tread) is attached.
  • the profiling is used for example Trim covering applied by injection molding in undercuts 31 of the profiling can intervene, whereby it, in particular in radial Direction, is particularly securely attached to the base body 1.
  • the Base body 1 has an outer diameter G
  • the hub 2 has an outer diameter Diameter N and the bore 21 the diameter B.
  • Figure 2 shows a side view of the base body 1 of Figure 1.
  • the hub 2 is arranged, wherein the base body 1 merges into the profiling 3, which is formed on the outer circumference 11 of the base body 1 is.
  • Figure 3 shows the section B-B of Figure 2 of the body according to the invention 1.
  • the hub 2 has around the left side the bore 21 has a smaller outer diameter than around the right side the bore 21.
  • the profiling 3 formed, which is designed symmetrically. So she owns on her left and on their right side an undercut 31, in the radial direction considered, as well as a bell-shaped arranged on the outer circumference Profile 32.
  • the base body 1 of Figure 3 is temporally separated by two Subsequent processing stages have been produced. This was initially the blank 4 of Figure 5 by extrusion with the help of an extrusion tool reshaped into the shape of Figure 4. After that the preliminary stage 41 of the base body 1 was subjected to a further flow process, in which the radial profile was molded, reshaped. In particular was the bell-shaped profile 32 on the outer circumference 11 molded.
  • FIG. 6 shows a basic body 1 designed according to the invention in the Side view, the profiling 3, which is designed approximately like that of Figure 4.
  • the openings 5 can be configured differently, with different configurations are not normally carried out on a base body 1. It is with figure 6 exceptionally the case to represent different openings 5 to be able to. These are, for example, as on the outer circumference of the profiling 3 open triangular openings 51 formed, or in Form of substantial circular also open on the outer circumference 11 Openings 52.
  • the openings 5, 51, 52 can also be through Extrusions are made, for example, during the molding of the radial profiling 3 on the outer circumference.
  • FIG. 7 shows a base body 1 designed according to the invention, which also has Markings 6 is provided as openings 61 in the base body (1) are trained. There are four evenly over the base body 1 Openings 61, each offset by 90 °, arranged. The markings 6 are viewed on the base body 1 in the radial direction between the Hub 2 and the undercut 31 arranged.
  • the base body 1 shown in FIGS. 1, 6 and 7 has additionally been subjected to a hardening process according to the invention after the extrusion.
  • heat curing was used as the method for curing. After extrusion in an oven, the base body was heated to a temperature near the melting point, then quenched in a water bath at approx. 515 ° C ⁇ 10 ° C and then in a warm air oven at approx. 170 ° C for several hours (between 8 hours and 12 hours). This gave the base body its hardness according to the invention of approximately 250 N / mm 2 to 350 N / mm 2 .
  • the material of the blank and thus also of the finished base body 1 is made according to the invention from an aluminum alloy AlMgSi, preferably AlMgSi 1. This can advantageously be extruded as well Hardening. Other materials, especially other aluminum alloys can also be used for a base body according to the invention if it has the Meet requirements according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Rolling Contact Bearings (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The body blank for a rotor bearing support disk (1) is made by high deformation pressing followed by a hardening process. The strength, especially round the hub (2) is between 250 and 350 N/mm2. The body (1) and hub (2) are made in one piece and at least some of the profiling (3) on the periphery is made by pressing. The body is made in a number of stages, the bore (21) being finished by machining. The profile (3) has an undercut (31) to assist in holding a synthetic running surface. The outer diameter (G) is preferably between 60 and 75 mm and the ratio between the diameter of the hub (N) and the bore (B) is between 1.8 and 2.3.

Description

Die vorliegende Erfindung betrifft einen Grundkörper für eine Stützscheibe für die Lagerung eines Offenend-Spinnrotors gemäß dem Oberbegriff des Patentanspruchs 1. Zur Lagerung von Offenend-Spinnrotoren werden sogenannte indirekte Lagerungen eingesetzt, da die Spinnrotoren mit weit mehr als 100.000 Umdrehungen pro Minute betrieben werden. Die indirekten Lager zur radialen Lagerung des Spinnrotors bestehen aus vier Stützscheiben, die paarweise angeordnet sind und dabei jedes Paar einen Keilspalt bildet, wobei in dem ersten Keilspalt der Bereich des Rotorschaftendes aufgenommen ist, während im anderen Keilspalt der Bereich des Rotorschaftes gelagert ist, der den Rotortopf des Spinnrotors aufnimmt. Die Stützscheiben bilden also auf ihrer Umfangsfläche die Lauffläche, auf der der Spinnrotor mit seinem Rotorschaft abrollt.The present invention relates to a base body for a support disc for the storage of an open-end spinning rotor according to the preamble of the claim 1. For the storage of open-end spinning rotors are so-called indirect bearings used because the spinning rotors with much more operated at 100,000 revolutions per minute. The indirect camp for the radial mounting of the spinning rotor consist of four support disks, which are arranged in pairs and each pair forms a wedge gap, the area of the rotor shaft end being accommodated in the first wedge gap while the area of the rotor shaft is supported in the other wedge gap that receives the rotor pot of the spinning rotor. Form the support disks So on its peripheral surface the tread on which the spinning rotor its rotor shaft rolls.

Diese Lauffläche besteht aus einem Kunststoff, z.B. Polyurethan, oder Kautschuk. Der Laufbelag einer Stützscheibe wird dazu beispielsweise mittels Spritzgießen auf den Grundkörper aufgebracht. Durch die immer weiter steigenden Drehzahlen der Offenend-Spinnrotoren werden auch die Stützscheiben mit höherer Drehzahl betrieben, was insbesondere dazu führt, daß der Laufbelag stärker belastet wird und sich damit auch die Gefahr erhöht, daß er sich vom Grundkörper der Stützscheibe ablöst. Um dies zu verhindern, sind aus dem Stand der Technik Profilierungen am Außenumfang des Stützscheiben-Grundkörpers bekannt, wobei zusätzlich auch noch teilweise Bohrungen in axialer Richtung oder Nuten oder Kerben eingebracht werden, um den Laufbelag besser mit dem Stützscheiben-Grundkörper zu verbinden. This tread is made of a plastic, e.g. Polyurethane, or rubber. The tread of a support disc is used for this purpose, for example Injection molding applied to the base body. Due to the ever increasing The speeds of the open-end spinning rotors also become the support disks operated at a higher speed, which leads in particular to the fact that the Tread is more heavily loaded and thus increases the risk that it detaches from the base body of the support disc. To prevent this, are profiles from the prior art on the outer circumference of the support disk base body known, in addition also partially holes be introduced in the axial direction or grooves or notches to better connect the tread to the base plate.

Diese Ausgestaltung des Umfangsbereiches des Stützscheiben-Grundkörpers erfordert allerdings einen hohen Fertigungsaufwand, da beispielsweise Bohrungen immer in einem zusätzlichen Arbeitsschritt eingebracht werden müssen, während der Grundkörper ansonsten beispielsweise durch Drehen aus einem Vollmaterial hergestellt wird. Bekannt ist es auch Stützscheiben-Grundkörper durch Fließpressen herzustellen.This configuration of the peripheral region of the support disk base body however, requires a high manufacturing effort, for example Holes are always drilled in an additional step have to be, while the base body otherwise, for example is made from a solid material by turning. It is also known Manufacture supporting disc base body by extrusion.

Der Nachteil der bekannten Stützscheibengrundkörper ist, daß sie nur mit großem Bearbeitungsaufwand in ausreichender Qualität hergestellt werden können oder keine genügende Festigkeit aufweisen, so daß sich Befestigungsprobleme mit den sie tragenden Wellen ergeben.The disadvantage of the known support disk base body is that it only with large processing effort in sufficient quality may or may not have sufficient strength, so that mounting problems with the waves that carry them.

Aufgabe der vorliegenden Erfindung ist es, einen Grundkörper für eine Stützscheibe vorzuschlagen, der kostengünstig und mit wenigen Bearbeitungsschritten herstellbar ist und dabei gleichzeitig eine hohe Festigkeit aufweist, die es erlaubt, ihn sicher auf einer Achse eines Lagers zu befestigen. Diese Aufgabe wird erfindungsgemäß durch eine Stützscheibe mit einem Grundkörper gemäß der vorliegenden Erfindung gelöst. Dadurch, daß der Grundkörper durch Fließpressen hergestellt ist und nach dem Fließpressen einem Härtevorgang unterzogen worden ist, wird erreicht, daß der Grundkörper kostengünstig ist, sowie daß seine Formgebung mit ausreichender Passgenauigkeit herstellbar ist und darüber hinaus eine genügende Festigkeit aufweist, die es erlaubt, ihn mittels Achsen zu lagern und während des Betriebs formstabil zu bleiben.The object of the present invention is to provide a base body for a support disk propose the inexpensive and with few processing steps can be produced and at the same time has high strength, which allows it to be securely attached to an axis of a bearing. This The object is achieved by a support disk with a base body solved according to the present invention. Because the main body is made by extrusion and one after extrusion Has been subjected to the hardening process, it is achieved that the base body is inexpensive is, and that its shape with sufficient accuracy of fit is producible and also has sufficient strength, which allows it to be stored by means of axes and during operation to keep its shape.

Besonders vorteilhaft besteht dazu der Grundkörper aus einer Aluminiumlegierung, die Magnesium und Silizium enthält, da diese besonders gut geeignet ist, durch Fließpressen in die gewünschte Form gebracht zu werden und darüber hinaus kann diese Legierung besonders vorteilhaft im Anschluß an die Formgebung besonders einfach und mit ausreichender Festigkeit gehärtet werden. For this purpose, the base body is particularly advantageously made of an aluminum alloy, which contains magnesium and silicon, as these are particularly suitable is to be extruded into the desired shape and In addition, this alloy can be particularly advantageous after the shape hardened particularly easily and with sufficient strength become.

In vorteilhafter Weiterbildung enthält die Aluminiumlegierung Kupfer, wodurch erreicht wird, daß der Grundkörpers mit einem besonders großen Festigkeit hergestellt werden kann. Besonders günstig ist dabei ein Grundkörper, der kalt ausgehärtet ist, da dies zu besonders hoher Festigkeit führt. In weiterer besonders günstiger Weiterbildung der Erfindung ist der Grundkörper warm ausgehärtet, wodurch er eine hohe Festigkeit und darüber hinaus eine geringe Sprödigkeit und somit also besonders gute Gebrauchseigenschaften aufweist.In an advantageous further development, the aluminum alloy contains copper, whereby is achieved that the base body with a particularly high strength can be manufactured. A basic body is particularly favorable here is hardened cold, as this leads to particularly high strength. In another Particularly advantageous development of the invention, the base body is warm cured, making it high strength and also low Has brittleness and therefore particularly good usage properties.

Dadurch, daß der Grundkörper wenigstens teilweise eine Festigkeit von wenigstens 220 N/mm2 hat, wird sicher erreicht, daß er beispielsweise über ein Bohrung an einer Achse zuverlässig gelagert werden kann. Durch die Verwendung eines Grundkörpers mit einer Festigkeit von wenigstens 250 N/mm2 ist es möglich, zur Lagerung eine Achse in eine Bohrung des Grundkörpers einzuführen, die vorteilhaft einen relativ geringen Durchmesser besitzt. Besonders günstig ist der Grundkörper mit eine Festigkeit zwischen 250 N/mm2 und 350 N/mm2 ausgestaltet, weil mit einem derartigen Grundkörper zuverlässig hohe Drehzahlen gefahren werden können, ohne daß Probleme an der Verbindung zwischen Grundkörper und der ihn lagernden Achse auftreten.The fact that the base body at least partially has a strength of at least 220 N / mm 2 ensures that it can be reliably supported, for example, via a bore on an axis. By using a base body with a strength of at least 250 N / mm 2 , it is possible to insert an axis into a bore of the base body for storage, which advantageously has a relatively small diameter. The base body is particularly favorable with a strength between 250 N / mm 2 and 350 N / mm 2 , because with such a base body high speeds can be reliably driven without problems with the connection between the base body and the axis supporting it.

Besonders günstig ist der Grundkörper mit der erfindungsgemäßen Festigkeit wenigstens im Bereich seiner Nabe ausgestattet. In diesem Bereich treten die größten Belastungen, insbesondere durch das Lagermittel auf, so daß im Bereich der Nabe die Festigkeit von besonderer Bedeutung ist. In weiterer vorteilhafter Ausgestaltung sind Grundkörper und Nabe einteilig ausgebildet, wodurch die Herstellung besonders einfach und kostengünstig ist.The base body with the strength according to the invention is particularly favorable equipped at least in the area of his hub. Step in this area the greatest loads, especially by the storage means, so that in Area of the hub the strength is of particular importance. In another advantageous embodiment, the base body and the hub are formed in one piece, whereby the production is particularly simple and inexpensive.

Vorteilhaft besitzt der Grundkörper an seinem Außenumfang eine Profilierung, die wenigstens zum Teil durch Fließpressen hergestellt ist. Dadurch wird erreicht, daß die Profilierung besonders kostengünstig ausgebildet werden kann und gleichzeitig eine Formgebung der Profilierung ermöglicht werden kann, die mit anderen Herstellungsverfahren nur schwierig herzustellen ist. Vorteilhaft können dabei auch Hinterschneidungen an der Profilierung insbesondere durch Fließpressen realisiert werden. Durch die Ausbildung des Grundkörpers mittels des Fließpressens wird besonders vorteilhaft erreicht, daß der Grundkörper, bis auf die eventuell erforderliche Bearbeitung der Bohrung, komplett fertig hergestellt werden kann, was die Herstellungskosten senkt. Durch die symmetrische Ausgestaltung der Profilierung ergeben sich fertigungstechnische Vorteile sowie der besondere Vorteil, daß eine anschließende auf dem Grundkörper aufgebrachte Garnitur gleichmäßig am Grundkörper festgelegt werden kann.The base body advantageously has a profile on its outer circumference, which is at least partially made by extrusion. Thereby it is achieved that the profiling can be formed particularly inexpensively can and at the same time a shaping of the profiling can be made possible can be difficult to manufacture with other manufacturing processes is. Undercuts on the profile can also be advantageous in particular by extrusion. Through training of the base body by means of extrusion is achieved particularly advantageously, that the basic body, except for the processing that may be required the bore, can be made completely finished, which reduces the manufacturing cost lowers. Result from the symmetrical design of the profiling manufacturing advantages and the particular advantage that a subsequent set on the basic body evenly on Basic body can be determined.

Die Ausgestaltung der Profilierung mit einem radial außen angeordneten glockenkurvenförmigen Profil ergibt vorteilhaft ein leicht durch Fließpressen herzustellendes Profil radial am Außenumfang des Grundkörpers, das gleichzeitig besonders günstig ist für das Festlegen einer Garnitur und darüber hinaus dafür sorgt, daß beim Aufbringen einer Garnitur die Materialstärke der Garnitur bzw. des Belages der Stützscheibe insbesondere bei Ausgestaltung des Belages mit einer Rille immer konstant bleibt.The design of the profile with a radially arranged outside bell-shaped profile advantageously results in an easy extrusion Profile to be produced radially on the outer circumference of the base body at the same time is particularly cheap for setting a set and above also ensures that when applying a set the material thickness the set or the covering of the support disc, especially when designed with a groove always remains constant.

Besonders günstig ist die Ausgestaltung eines Grundkörpers, der am Außenumfang in axialer Richtung Durchbrechungen besitzt, die durch Fließpressen oder durch Stanzen hergestellt sind. Dadurch kann auf einfache Weise ein besonders vorteilhafter Grundkörper hergestellt werden, an dem besonders einfach und sicher eine Garnitur, das heißt ein Laufbelag, festgelegt werden kann. Insbesondere durch Stanzen sind diese Durchbrechungen besonders einfach und kostengünstig, auch in einem nachfolgenden Bearbeitungsprozess, herstellbar.The design of a base body on the outer circumference is particularly favorable has openings in the axial direction caused by extrusion or are produced by stamping. This can be done easily A particularly advantageous base body can be produced on the a set, that is to say a tread, is particularly easily and securely fixed can be. These are openings in particular by punching particularly simple and inexpensive, even in a subsequent machining process, produced.

In weiterer besonders günstiger Ausgestaltung eines Grundkörpers für eine Stützscheibe gemäß der Erfindung ist dieser mit Markierungen versehen, die mittels Fließpressen oder Stanzen hergestellt sind. Mit Hilfe dieser Markierungen ist es besonders einfach möglich, die Drehzahl der Stützscheibe zu erfassen, wie dies insbesondere bei im Stand der Technik bekannten Anspinnverfahren erforderlich ist. Durch die Markierung, insbesondere wenn diese als Durchbrechung ausgebildet ist, die durch Fließpressen oder Stanzen hergestellt wurde, wird eine einfache Möglichkeit geschaffen, die Drehzahl der Stützscheibe zu messen, ohne daß an dieser weitere Maßnahmen vorgenommen werden müssen.In a further particularly favorable embodiment of a base body for a Support disc according to the invention, this is provided with markings are produced by means of extrusion or punching. With the help of these markings it is particularly easy to increase the speed of the support disc detect how this is particularly the case in piecing processes known in the prior art is required. By marking, especially if this is designed as an opening through extrusion or punching a simple way is created, the speed to measure the support disc without taking any further measures must be made.

Besonders vorteilhaft, weil auch kostengünstig und wiederholgenau herstellbar, ist ein erfindungsgemäßer Grundkörper, der durch mehrere, beispielsweise einander zeitlich nachgeordnete, Bearbeitungsstufen, bestehend aus Fließpressen, hergestellt ist.Particularly advantageous because it can also be produced inexpensively and with repeat accuracy, is a basic body according to the invention, which by several, for example processing stages that are subordinate to each other, consisting of Extrusion is made.

Besonders günstig eignen sich dazu zwei oder drei zeitlich einander nachgeordnete Bearbeitungsstufen, weil dadurch sichere Maßhaltigkeit und gleichzeitig feste und kostengünstige Grundkörper erzeugbar sind. Vorteilhaft kann der Grundkörper zusätzlich durch spanende Bearbeitung nachgearbeitet werden, insbesondere im Bereich der Bohrung, so daß nach dem Fließpressen die Bohrung zur Aufnahme einer Achse, insbesondere, mit sehr engen Toleranzen herstellbar ist. Dadurch daß der Grundkörper gemäß der Erfindung zwischen 55 mm und 80 mm im Durchmesser besitzt, vorzugsweise zwischen 60 mm und 75 mm, wird erreicht, daß die Nabe am Grundkörper in ausreichender Größe hergestellt werden kann und insbesondere auch, daß beim Fließpressen eine genügende Verformung stattfindet, so daß ein Verzug weitgehend verhindert wird.Two or three subordinate ones in time are particularly suitable for this purpose Processing stages, because this ensures reliable dimensional accuracy and at the same time solid and inexpensive basic bodies can be produced. Can be beneficial the basic body is also reworked by machining be, especially in the area of the hole, so that after extrusion the bore for receiving an axis, in particular, with very narrow Tolerances can be produced. Characterized in that the base body according to the invention between 55 mm and 80 mm in diameter, preferably between 60 mm and 75 mm, it is achieved that the hub on the base body in sufficient size can be produced and in particular that sufficient deformation takes place during extrusion, so that a distortion is largely prevented.

In einer weiteren besonders günstigen Auslegung des Grundkörpers besitzt dieser einen Außendurchmesser, der im Verhältnis zum Durchmesser der Bohrung der Nabe zwischen 1,6 und 2,5 liegt, besonders günstig zwischen 1,8 und 2,3. Dadurch wird vorteilhaft sichergestellt, daß die Nabe in der Lage ist ausreichend Kraft beim Aufpressen auf eine Welle auszuüben, die ein sicheres Festlegen einer Stützscheibe mit ihrem Grundkörper an einer Achse gewährleistet. In a further particularly favorable design of the base body this an outer diameter, which is in relation to the diameter of the Bore of the hub is between 1.6 and 2.5, particularly favorable between 1.8 and 2.3. This advantageously ensures that the hub is in position sufficient force is to be exerted when it is pressed onto a shaft, which is a safe Define a support disc with its base body on an axis guaranteed.

Die vorteilhafte Ausgestaltung der Markierung als Durchbrechung ermöglicht zusätzliche Bauteilung zu einer Markierung der Stützscheibe einzusparen und dadurch diese kostengünstig auszubilden. Vorteilhaft wird beim Einsatz mehrerer Durchbrechungen Sorge getragen, daß diese vorzugsweise über 180 ° auf der Stützscheibe bzw. um deren Achse verteilt angeordnet sind.The advantageous design of the marking as an opening enables save additional components for marking the support disc and thereby train them inexpensively. It is advantageous when used several breakthroughs made sure that these preferably over 180 ° are arranged on the support disc or distributed around its axis.

Im folgenden wird die Erfindung anhand zeichnerischer Darstellungen beschrieben. Es zeigen

Figur 1
eine perspektivische Darstellung eines erfindungsgemäßen Grundkörpers 1,
Figur 2
eine Seitenansicht des Grundkörpers 1 von Figur 1,
Figur 3
den Schnitt B-B von Figur 2,
Figur 4
einen Schnitt durch eine Vorstufe von Figur 3,
Figur 5
einen Schnitt durch einen Rohling,
Figur 6
eine Seitenansicht eines Grundkörpers mit axialen Aussparungen am Außenumfang,
Figur 7
eine Seitenansicht eines Grundkörpers mit vier Markierungen.
The invention is described below with the aid of drawings. Show it
Figure 1
2 shows a perspective illustration of a base body 1 according to the invention,
Figure 2
2 shows a side view of the base body 1 from FIG. 1,
Figure 3
the section BB of Figure 2,
Figure 4
4 shows a section through a preliminary stage from FIG. 3
Figure 5
a cut through a blank,
Figure 6
2 shows a side view of a base body with axial cutouts on the outer circumference,
Figure 7
a side view of a body with four markings.

Figur 1 zeigt eine perspektivische Darstellung eines erfindungsgemäßen Grundkörpers 1 für eine Stützscheibe zur Lagerung eines Offenend-Spinnrotors. Der Grundkörper 1 besitzt eine Nabe 2, mit einer Bohrung 21, in die mit Hilfe eines Preßsitzes der Grundkörper 1 einer Stützscheibe im Betriebsfall auf einer Achse befestigt ist, die ihrerseits in Lagern, beispielsweise Wälzlagern, gelagert ist. Am Außenumfang des Grundkörpers besitzt dieser einer Profilierung 3 mit deren Hilfe auf dem Grundkörper 1 ein Garniturbelag (Laufbelag) befestigt ist. Die Profilierung dient dabei dazu, daß der beispielsweise mittels Spritzgießen aufgebrachte Garniturbelag in Hinterschneidungen 31 der Profilierung eingreifen kann, wodurch er, insbesondere in radialer Richtung, besonders sicher auf dem Grundkörper 1 befestigt ist. Der Grundkörper 1 besitzt einen Außendurchmesser G, die Nabe 2 einen äußeren Durchmesser N sowie die Bohrung 21 den Durchmesser B.Figure 1 shows a perspective view of an inventive Base body 1 for a support disc for mounting an open-end spinning rotor. The base body 1 has a hub 2, with a bore 21, in which with the help of a press fit of the base body 1 of a support disc in the operating case is attached to an axis, which in turn in bearings, for example Rolling bearings, is stored. This has on the outer circumference of the base body a profiling 3 with the help of a clothing covering on the base body 1 (Tread) is attached. The profiling is used for example Trim covering applied by injection molding in undercuts 31 of the profiling can intervene, whereby it, in particular in radial Direction, is particularly securely attached to the base body 1. The Base body 1 has an outer diameter G, the hub 2 has an outer diameter Diameter N and the bore 21 the diameter B.

Figur 2 zeigt eine Seitenansicht des Grundkörpers 1 von Figur 1. Um die Bohrung 21 ist die Nabe 2 angeordnet, wobei der Grundkörper 1 übergeht in die Profilierung 3, die am Außenumfang 11 des Grundkörpers 1 ausgebildet ist.Figure 2 shows a side view of the base body 1 of Figure 1. To the Bore 21, the hub 2 is arranged, wherein the base body 1 merges into the profiling 3, which is formed on the outer circumference 11 of the base body 1 is.

Figur 3 zeigt den Schnitt B-B von Figur 2 des erfindungsgemäßen Grundkörpers 1. Wie aus Figur 3 zu erkennen ist, besitzt die Nabe 2 um die linke Seite der Bohrung 21 einen kleineren Außendurchmesser als um die rechte Seite der Bohrung 21. Am Außenumfang 11 des Grundkörpers 1 ist die Profilierung 3 ausgebildet, die symmetrisch ausgestaltet ist. Sie besitzt also auf ihrer linken und ihrer rechten Seite je eine Hinterschneidung 31, in radialer Richtung betrachtet, sowie ein am Außenumfang angeordnetes glockenkurvenförmiges Profil 32. Der Grundkörper 1 von Figur 3 ist durch zwei zeitlich einander nachgeordnete Bearbeitungsstufen hergestellt worden. Dabei wurde zunächst der Rohling 4 von Figur 5 durch Fließpressen mit Hilfe eines Fließpreßwerkzeuges in die Form von Figur 4 umgeformt. Im Anschluß daran wurde die Vorstufe 41 des Grundkörpers 1 durch einen nochmaligen Fließprozess, bei dem die radiale Profilierung angeformt wurde, umgeformt. Insbesondere wurde dabei das glockenkurvenförmige Profil 32 am Außenumfang 11 angeformt.Figure 3 shows the section B-B of Figure 2 of the body according to the invention 1. As can be seen from Figure 3, the hub 2 has around the left side the bore 21 has a smaller outer diameter than around the right side the bore 21. On the outer circumference 11 of the base body 1 is the profiling 3 formed, which is designed symmetrically. So she owns on her left and on their right side an undercut 31, in the radial direction considered, as well as a bell-shaped arranged on the outer circumference Profile 32. The base body 1 of Figure 3 is temporally separated by two Subsequent processing stages have been produced. This was initially the blank 4 of Figure 5 by extrusion with the help of an extrusion tool reshaped into the shape of Figure 4. After that the preliminary stage 41 of the base body 1 was subjected to a further flow process, in which the radial profile was molded, reshaped. In particular was the bell-shaped profile 32 on the outer circumference 11 molded.

Figur 6 zeigt einen erfindungsgemäße ausgestalteten Grundkörper 1 in der Seitenansicht, wobei die Profilierung 3, die in etwa ausgestaltet ist wie die von Figur 4. Zusätzlich sind in axialer Richtung verlaufende Durchbrechungen 5 ausgebildet, die ausgestanzt wurden. Die Durchbrechungen 5 können dabei verschieden ausgestaltet sein, wobei verschiedene Ausgestaltungen normalerweise nicht an einem Grundkörper 1 ausgeführt sind. Es ist bei Figur 6 ausnahmsweise der Fall, um verschiedene Durchbrechungen 5 darstellen zu können. Diese sind beispielsweise als am Außenumfang der Profilierung 3 offenen dreieckförmige Durchbrechungen 51 ausgebildet, oder in Form von wesentlichen kreisrunden ebenfalls am Außenumfang 11 offenen Durchbrechungen 52. Die Durchbrechungen 5, 51, 52 können auch durch Fließpressen hergestellt werden, zum Beispiel während der Ausformung der radialen Profilierung 3 am Außenumfang.FIG. 6 shows a basic body 1 designed according to the invention in the Side view, the profiling 3, which is designed approximately like that of Figure 4. In addition, there are openings running in the axial direction 5 trained, which were punched out. The openings 5 can can be configured differently, with different configurations are not normally carried out on a base body 1. It is with figure 6 exceptionally the case to represent different openings 5 to be able to. These are, for example, as on the outer circumference of the profiling 3 open triangular openings 51 formed, or in Form of substantial circular also open on the outer circumference 11 Openings 52. The openings 5, 51, 52 can also be through Extrusions are made, for example, during the molding of the radial profiling 3 on the outer circumference.

Figur 7 zeigt einen erfindungsgemäß ausgestalteten Grundkörper 1, der mit Markierungen 6 versehen ist, die als Durchbrechungen 61 im Grundkörper (1) ausgebildet sind. Gleichmäßig über den Grundkörper 1 sind dabei vier Durchbrechungen 61, jeweils um 90° versetzt, angeordnet. Die Markierungen 6 sind dabei am Grundkörper 1 in radialer Richtung betrachtet zwischen der Nabe 2 und der Hinterschneidung 31 angeordnet.FIG. 7 shows a base body 1 designed according to the invention, which also has Markings 6 is provided as openings 61 in the base body (1) are trained. There are four evenly over the base body 1 Openings 61, each offset by 90 °, arranged. The markings 6 are viewed on the base body 1 in the radial direction between the Hub 2 and the undercut 31 arranged.

Der in Figur 1, 6 und 7 gezeigte Grundkörper 1 ist erfindungsgemäß nach dem Fließpressen zusätzlich noch einem Härteprozeß unterzogen worden. Als Verfahren zum Härten wurde erfindungsgemäß das Warmaushärten angewandt. Dabei ist der Grundkörper nach dem Fließpressen in einem Ofen auf eine Temperatur nahe dem Schmelzpunkt erwärmt worden, ca. 515°C ±10°C anschließend im Wasserbad abgeschreckt worden und danach im Warmluftofen bei ca. 170°C für mehrere Stunden (zwischen 8 Stunden und 12 Stunden) gelagert worden. Dadurch erhielt der Grundkörper seine erfindungsgemäße Härte von ca. 250 N/mm2 bis 350 N/mm2.The base body 1 shown in FIGS. 1, 6 and 7 has additionally been subjected to a hardening process according to the invention after the extrusion. According to the invention, heat curing was used as the method for curing. After extrusion in an oven, the base body was heated to a temperature near the melting point, then quenched in a water bath at approx. 515 ° C ± 10 ° C and then in a warm air oven at approx. 170 ° C for several hours (between 8 hours and 12 hours). This gave the base body its hardness according to the invention of approximately 250 N / mm 2 to 350 N / mm 2 .

Der Werkstoff des Rohlings und damit auch des fertigen Grundkörpers 1 besteht erfindungsgemäß aus einer Aluminiumlegierung AlMgSi, vorzugsweise AlMgSi 1. Dieser läßt sich vorteilhaft sowohl leicht Fließpressen als auch Härten. Andere Werkstoffe, insbesondere andere Aluminiumlegierungen sind für einen erfindungsgemäßen Grundkörper ebenso einsetzbar, wenn sie die Anforderungen gemäß der Erfindung erfüllen.The material of the blank and thus also of the finished base body 1 is made according to the invention from an aluminum alloy AlMgSi, preferably AlMgSi 1. This can advantageously be extruded as well Hardening. Other materials, especially other aluminum alloys can also be used for a base body according to the invention if it has the Meet requirements according to the invention.

Claims (23)

Grundkörper für eine Stützscheibe zur Lagerung eines Offenend-Spinnrotors, wobei der Grundkörper eine Nabe mit einer Bohrung zur Aufnahme einer Achse und einen Außenumfang zur Aufnahme eines Laufbelages besitzt, dadurch gekennzeichnet, daß der Grundkörper (1) durch Fließpressen hergestellt ist und nach dem Fließpressen einem Härtevorgang unterzogen worden ist.Base body for a support disc for mounting an open-end spinning rotor, the base body having a hub with a bore for receiving an axle and an outer circumference for receiving a tread, characterized in that the base body (1) is produced by extrusion and one after extrusion Has undergone hardening. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Grundkörper (1) aus einer Aluminiumlegierung besteht, die Magnesium und Silizium enthält.Base body according to one or more of claims 1 to 4, characterized in that the base body (1) consists of an aluminum alloy which contains magnesium and silicon. Grundkörper nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Grundkörper (1) aus einer Aluminiumlegierung besteht, die Kupfer enthält.Base body according to claim 1 or 2, characterized in that the base body (1) consists of an aluminum alloy containing copper. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Grundkörper (1) kalt ausgehärtet ist.Base body according to one or more of claims 1 to 3, characterized in that the base body (1) is hardened cold. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß Grundkörper (1) warm ausgehärtet ist.Base body according to one or more of claims 1 to 3, characterized in that the base body (1) is thermoset. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Grundkörper (1) wenigstens teilweise eine Festigkeit Rm von wenigstens 220 N/mm2 hat. Base body according to one or more of claims 1 to 5, characterized in that the base body (1) at least partially has a strength R m of at least 220 N / mm 2 . Grundkörper nach Anspruch 6, dadurch gekennzeichnet, daß der Grundkörper (1) eine Festigkeit Rm von wenigstens 250 N/mm2 Base body according to claim 6, characterized in that the base body (1) has a strength R m of at least 250 N / mm 2 Grundkörper nach Anspruch 7, dadurch gekennzeichnet, daß der Grundkörper (1) eine Festigkeit zwischen 250 N/mm2 und 350 N/mm2 hat.Base body according to claim 7, characterized in that the base body (1) has a strength between 250 N / mm 2 and 350 N / mm 2 . Grundkörper nach einem oder mehreren der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß der Grundkörper (1) die Festigkeit wenigstens im Bereich seiner Nabe (2) hat.Base body according to one or more of claims 6 to 8, characterized in that the base body (1) has the strength at least in the region of its hub (2). Grundkörper nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß Grundkörper (1) und Nabe (2) einteilig ausgebildet sind.Base body according to one or more of claims 1 to 9, characterized in that the base body (1) and hub (2) are formed in one piece. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Grundkörper (1) an seinem Außenumfang (11) mit einer Profilierung (3) versehen ist, die wenigstens zum Teil durch Fließpressen hergestellt ist.Base body according to one or more of claims 1 to 10, characterized in that the base body (1) is provided on its outer circumference (11) with a profile (3) which is at least partially produced by extrusion. Grundkörper nach Anspruch 11, dadurch gekennzeichnet, daß die Profilierung (3) in radialer Richtung betrachtet eine Hinterschneidung (31) besitzt.Base body according to claim 11, characterized in that the profiling (3), viewed in the radial direction, has an undercut (31). Grundkörper nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die Profilierung (3) symmetrisch ausgebildet ist.Base body according to claim 11 or 12, characterized in that the profiling (3) is symmetrical. Grundkörper nach einem oder mehreren der Ansprüche 11 bis 13 dadurch gekennzeichnet, daß die Profilierung (3) radial außen ein glockenkurvenförmiges Profil (32) besitzt Base body according to one or more of claims 11 to 13, characterized in that the profiling (3) has a bell-shaped profile (32) radially on the outside Grundkörper nach einem oder mehreren der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß am Außenumfang (11) in axialer Richtung Durchbrechungen (5, 51, 52) vorgesehen sind, die durch Fließpressen und/oder durch Stanzen hergestellt sind.Base body according to one or more of claims 1 to 14, characterized in that openings (5, 51, 52) are provided on the outer circumference (11) in the axial direction, which are produced by extrusion and / or by punching. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß am Grundkörper (1) eine Markierung (6) angebracht ist, die durch Fließpressen und / oder Stanzen hergestellt ist.Base body according to one or more of claims 1 to 15, characterized in that a marking (6) is made on the base body (1) and is made by extrusion and / or stamping. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß der Grundkörper (1) durch mehrere, vorzugsweise drei, zeitlich einander nachgeordnete Bearbeitungsstufen bestehend aus Fließpressen hergestellt ist.Base body according to one or more of claims 1 to 16, characterized in that the base body (1) is produced by a plurality of, preferably three, processing stages consisting of extrusion, which are arranged in time. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 17, dadurch gekennzeichnet, daß die Bohrung (21) nach dem Fließpressen durch spanende Bearbeitung bearbeitet ist.Base body according to one or more of claims 1 to 17, characterized in that the bore (21) is machined after extrusion. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß der Grundkörper (1) einen Außendurchmesser (G) zwischen 55 mm und 80 mm, vorzugsweise zwischen 60 mm und 75 mm besitzt.Base body according to one or more of claims 1 to 18, characterized in that the base body (1) has an outer diameter (G) between 55 mm and 80 mm, preferably between 60 mm and 75 mm. Grundkörper nach einem oder mehreren der Ansprüche 1 bis 19, dadurch gekennzeichnet, daß das Verhältnis des größten äußeren Durchmessers (N) der Nabe zu dem Durchmesser (B) der Bohrung der Nabe zwischen 1,6 und 2,5 vorzugsweise zwischen 1,8 und 2,3 beträgt.Base body according to one or more of claims 1 to 19, characterized in that the ratio of the largest outer diameter (N) of the hub to the diameter (B) of the bore of the hub is between 1.6 and 2.5, preferably between 1.8 and Is 2.3. Grundkörper nach einem oder mehreren der Ansprüche 16 bis 20, dadurch gekennzeichnet, daß die Markierung (6) als Durchbrechung ausgebildet ist. Base body according to one or more of claims 16 to 20, characterized in that the marking (6) is designed as an opening. Grundkörper nach einem oder mehreren der Ansprüche 16 bis 21, dadurch gekennzeichnet, daß der Grundkörper (1) mehrere Markierungen (6) besitzt, die vorzugsweise 180° zueinander versetzt angeordnet sind.Base body according to one or more of claims 16 to 21, characterized in that the base body (1) has a plurality of markings (6) which are preferably arranged offset by 180 ° to one another. Grundkörper nach Anspruch 21 oder 22, dadurch gekennzeichnet, daß die Durchbrechung in radialer Richtung betrachtet zwischen der Nabe (2) und der Hinterschneidung (31) angeordnet ist.Base body according to claim 21 or 22, characterized in that the opening, viewed in the radial direction, is arranged between the hub (2) and the undercut (31).
EP02025442A 2002-01-10 2002-11-15 Method for producing of a basic body for the support disk of an OE-rotor bearing and basic body Expired - Lifetime EP1327707B1 (en)

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DE102012014660A1 (en) 2012-07-24 2014-01-30 Saurer Germany Gmbh & Co. Kg Support disk storage for an open-end spinning device

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US4713932A (en) * 1986-05-10 1987-12-22 Fritz Stahlecker Supporting disk for a supporting-disk bearing of an open-end spinning machine
DE4019028A1 (en) * 1990-06-14 1991-12-19 Schurr Stahlecker & Grill Open=end spinning rotor with reduced vibration - has driving discs with dovetailed groove and pref. rings fitting tightly in groove, for high speed
EP1043431A1 (en) * 1999-03-09 2000-10-11 W. SCHLAFHORST AG & CO. Bearing for a spinning rotor in an open-end spinningdevice
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EP1146152A1 (en) * 2000-04-13 2001-10-17 Rieter Ingolstadt Spinnereimaschinenbau AG Support disc with a caouchouc ring for a disc bearing holding a spinning rotor

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DE4011632A1 (en) * 1990-04-11 1991-10-17 Fritz Stahlecker Support discs for OE rotor - has increased surface contact between metal disc and synthetic ring
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US4713932A (en) * 1986-05-10 1987-12-22 Fritz Stahlecker Supporting disk for a supporting-disk bearing of an open-end spinning machine
DE4019028A1 (en) * 1990-06-14 1991-12-19 Schurr Stahlecker & Grill Open=end spinning rotor with reduced vibration - has driving discs with dovetailed groove and pref. rings fitting tightly in groove, for high speed
US6220761B1 (en) * 1998-05-29 2001-04-24 Rieter Ingolstadt Spinnereimaschinenbau Ag Bearing arrangement with cooling groove for an open-end spin rotor using support disks
EP1043431A1 (en) * 1999-03-09 2000-10-11 W. SCHLAFHORST AG & CO. Bearing for a spinning rotor in an open-end spinningdevice
EP1146152A1 (en) * 2000-04-13 2001-10-17 Rieter Ingolstadt Spinnereimaschinenbau AG Support disc with a caouchouc ring for a disc bearing holding a spinning rotor

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WO2016150755A1 (en) * 2015-03-25 2016-09-29 Rieter Ingolstadt Gmbh Spinning rotor comprising a lining, supporting disc for bearing a spinning rotor and open-end spinning device comprising a spinning rotor and a bearing device comprising supporting discs

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DE10200743A1 (en) 2003-07-24
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TW200301791A (en) 2003-07-16
EP1327707B1 (en) 2006-05-24

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