EP0132567B1 - Clamping device for a ring wheel - Google Patents

Clamping device for a ring wheel Download PDF

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Publication number
EP0132567B1
EP0132567B1 EP84106731A EP84106731A EP0132567B1 EP 0132567 B1 EP0132567 B1 EP 0132567B1 EP 84106731 A EP84106731 A EP 84106731A EP 84106731 A EP84106731 A EP 84106731A EP 0132567 B1 EP0132567 B1 EP 0132567B1
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EP
European Patent Office
Prior art keywords
slip ring
radius
flange
wedges
centering device
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EP84106731A
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German (de)
French (fr)
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EP0132567A1 (en
Inventor
Erwin Junker
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Individual
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Individual
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Priority claimed from DE19833322258 external-priority patent/DE3322258C1/en
Priority claimed from DE19843405556 external-priority patent/DE3405556C1/en
Application filed by Individual filed Critical Individual
Priority to AT84106731T priority Critical patent/ATE27237T1/en
Publication of EP0132567A1 publication Critical patent/EP0132567A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16Bushings; Mountings

Definitions

  • the invention relates to a centering device for a metal slip ring, which has a grinding surface on its outer circumference, with a tensioning flange and a support flange, the support part of which has a plurality of radially projecting wedges running over its length, which are assigned corresponding grooves in the bore of the slip ring.
  • Slip rings usually have circular bores, and the support pins of the clamping flanges also have a circular cross section. Because of the very high speeds at which slip rings rotate, eccentricities in the slip ring bearings produce dangerously large ones. Mass forces. Therefore, when clamping a slip ring, care must be taken to avoid imbalance, i.e. to ensure exact centering. In the known slip rings, the play between the slip ring bore and the trunnion is therefore kept extremely low. This avoids an imbalance, but at the cost of the disadvantage that it is very difficult to slide the slip ring onto the trunnion.
  • a tensioning device for a slip ring with the above-mentioned disadvantages is known (FR-A-445,807), in which wedges in the supporting flange and grooves in the slip ring are to be used to make such a connection between these parts that the slip ring is prevented from bursting.
  • US-A-1 661 861 describes a device for fastening a rotating grinding wheel to a flange of a flexible shaft, the grinding wheel and the flange having curved and undercut surfaces on protrusions which, when the grinding wheel rotates relative to the flange, in relation to one another Coming system and thus cause a tightening, which can be increased by bolts extending through the flange. Apart from the fact that these surfaces require a special effort in the manufacture of the flange and the wheel, with this arrangement an exact centering of the grinding wheel on the flange is neither addressed nor possible.
  • the object of the invention is to develop a centering device for a slip ring in such a way that it is possible in a simple manner to place the slip ring, which is cheaper to manufacture than before, with a large amount of play and thus easily onto the supporting flange, but to set a slight play before tightening to achieve a good centering and a perfect concentricity.
  • three wedges are provided that are evenly distributed over the circumference.
  • the maximum tolerance between the radii is 5 11m.
  • this centering device according to the invention for, in particular, slip rings with cubic boron nitride is that, given the tolerance of bore of the grinding wheel to the diameter of the supporting part in the range of 5 11 m, the grinding wheel can no longer be mounted using conventional methods, with the proposal according to the invention, however, it is easy to slide the slip ring onto the support part if the grooves of the slip ring are aligned with the wedges on the circumference of the support part. After reaching the position of the slip ring perpendicular to the axis, the slip ring then only needs to be rotated so that the required fit is produced. In this position, the slip ring is clamped in the usual way between the support flange and the clamping flange.
  • the centering takes place in that the wedges, with their outer contours increasing in cross-sectional profile, lay like wedge-like inclined planes on groove edges of the slip ring, whereby this, controlled by the wedge-like inclined planes, slips into the exactly centered position. Because this type of centering without a tight concentric fit of the wedges in the slip ring bore , there is no need to use slip rings with narrow radial tolerances. Slip rings with relatively wide radial tolerances can be manufactured comparatively cheaply.
  • Each wedge expediently has a contour increasing from the smaller radius to the larger radius in the form of a circular arc with the radius whose center of curvature is offset laterally by an eccentricity from the center of the supporting part of the supporting flange.
  • the contour advantageously increases counter to the direction of rotation of the supporting part.
  • preferably three wedges are evenly distributed over the entire circumference of the supporting part of the supporting flange.
  • a supporting part with three evenly spaced wedges can rest on three and only three equally spaced locations on the slip ring.
  • a particular advantage of this design of the centering device is that it allows not only easy sliding on and precise centering, but also cheaper manufacture of the slip rings, namely those with further radial tolerances.
  • a slip ring 1 is shown, which sits with its bore 10 on the support member 3 of a centering device on a drive shaft 4.
  • the support part 3 is part of the support flange 5, which has a flat annular surface as a clamping surface 6, which is arranged exactly at right angles to the longitudinal axis of the drive shaft 4.
  • the slip ring 1 is held on the support part 3 with the aid of a clamping flange 2 which is screwed to the support flange 5.
  • a bore 10 with the inner radius B has, as is clearly shown in FIGS. 2 to 5, three axially parallel grooves 8 arranged at the same distance from one another, while on the circumference of the supporting part 3 there are likewise equally spaced wedges 9 which are somewhat narrower than the grooves 9 of the slip ring 1 are.
  • the slip ring 1 can therefore be pushed onto the support part 3 with so much play that the slip ring and the support part hardly touch
  • the right angle of the slip ring to the axis of rotation is exactly given when the slip ring 1 rests with its end face 7 on the support flange 5.
  • the slip ring 1 is then rotated with respect to the flange 5 with its support part 3 until the position shown in Fig. 4 is reached the known fixing of the slip ring on the centering device, for example with the aid of the clamping flange 2 shown in FIG. 1.
  • the centering device shown in FIGS. 5 and 6 also serves to center the slip ring 1, which is formed from boron nitride with a suitable bond and, according to experience, is very sensitive to imbalance.
  • This device consists of the drive shaft 4, the supporting flange 5, the supporting part 3, the bearing journal and the clamping flange 2.
  • the slip ring 1 has, in the bore 10, three likewise axially parallel grooves 8, which are evenly distributed, that is to say offset from one another by 120 ° in each case.
  • the support part 3 of the support flange 5 carries three wedges 11, 12 and 13, which are also equally spaced from each other by 120 °.
  • the cross-sectional profile of each wedge 11, 12 and 13 increases from a smaller radius R1; which is smaller than the bore radius B, steadily increases to a larger radius R2 which is larger than the bore radius B.
  • the contour of the wedge 11 becomes a wedge-like inclined plane, which runs up to the edge of the groove 8 when the slip ring 1 rotates clockwise.
  • Rotation of the slip ring 1 clockwise therefore means that the slip ring 1 lies against all three wedge contours and, controlled by them, into the centered position shown in FIG. 5 slips. In this position, the slip ring is fixed by tightening the clamping flange 2.
  • the direction of rotation of the centering device is indicated by an arrow 15 in FIG. 6. It is expedient that the contour of the wedges increases counter to the direction of rotation according to arrow 15, e.g. with the wedge 11 the smaller radius R1 runs ahead.
  • the wedge contour can be increased from the smaller radius R1 to the larger radius R2 in various ways. In principle, a linear increase is even possible. 6 shows a particularly simple solution in terms of production technology. Thereafter, the contour of the wedge 11 is in the form of a circular arc, but the center of curvature M2 of the circular arc with the radius R is offset laterally by the eccentricity x from the center M1 of the supporting part 3 of the supporting flange 5.

Description

Die Erfindung betrifft eine Zentriervorrichtung fur einen metallenen Schleifring, der an seinen Außenumfang einen Schleifbelag aufweist, mit einen Spann- und einem Tragflansch, dessen Tragteil mehrere über seine Länge verlaufende, radial vorspringende Keile aufweist, welche entsprechenden Nuten in der Bohrung des Schleifringes zugeordnet sind.The invention relates to a centering device for a metal slip ring, which has a grinding surface on its outer circumference, with a tensioning flange and a support flange, the support part of which has a plurality of radially projecting wedges running over its length, which are assigned corresponding grooves in the bore of the slip ring.

Schleifringe haben meist kreisrunde Bohrungen und den entsprechend haben auch die Tragzapfen der Spannflansche meist kreisrunden Querschnitt. Wegen der sehr hohen Drehzahlen, mit denen Schleifringe umlaufen, erzeugen Exzentrizitäten in der Schleifringlagerung gefährlich große. Massenkräfte. Darum ist beim Einspannen eines Schleifringes sorgfältig auf die Vermeidung von Unwucht, also auf genaue Zentrierung zu achten. Bei den bekannten Schleifringen wird deshalb des Spiel zwischen der Schleifringbohrung und den Tragzapfen äußerst gering gehalten. Zwar wird dadurch eine Unwucht vermieden, doch dies um den Preis des Nachteils, daß das Aufschieben des Schleifrings auf den Tragzapfen sehr schwierig wird. Wegen des sehr engen Spiels verkantet nämlich der Schleifring beim aufschieben leicht, und es erfordert dann jedesmal viel Fingerspitzengefühl, die Verkantung, wenn dies überhaupt möglich ist, ohne Beschädigung des Schleifrings zu lösen und das Aufschieben auf den Tragzapfen erneut zu versuchen. Viele Arbeitsunfälle beim Schleifen sind auf praktisch unsichtbare Defekte am Schleifring zurückzuführen, die dieser erst beim Einspannen in die Spannvorrichtung erlitten hat.Slip rings usually have circular bores, and the support pins of the clamping flanges also have a circular cross section. Because of the very high speeds at which slip rings rotate, eccentricities in the slip ring bearings produce dangerously large ones. Mass forces. Therefore, when clamping a slip ring, care must be taken to avoid imbalance, i.e. to ensure exact centering. In the known slip rings, the play between the slip ring bore and the trunnion is therefore kept extremely low. This avoids an imbalance, but at the cost of the disadvantage that it is very difficult to slide the slip ring onto the trunnion. Because of the very tight play, the slip ring tilts slightly when it is slid on, and it always takes a lot of tact to loosen the tilt, if this is possible at all, without damaging the slip ring and trying to push it back onto the trunnion. Many work accidents during grinding are due to practically invisible defects on the slip ring, which the ring only suffered when it was clamped in the clamping device.

Bislang wurden Schleifscheiben für ihren Einsatz auf Schleifmaschinen auf den Dorn bzw. Tragteil eines Tragflansches geschoben und in ihrer Endlage mit Hilfe beispielsweise eines Spannflansches festgelegt (US-A- 2 497 217). Der wesentliche Nachteil dieser bekannten Schleifscheibenspannvorrichtung besteht darin, daß das Aufsetzen der Schleifscheibe auf den Tragteil wegen der geringen Toleranz schwierig ist, zumal dann, wenn die Schleifscheibe etwas schräg auf den Tragteil aufgesetzt und dabei verkantet, wonach ein weiteres Aufsetzen unmöglich und darüber hinaus bei einem Verkanten auch die Bohrung der Schleifscheibe beschädigt wird. Hieraus ergibt sich als weiterer Nachteil ein nichtzentrischer Lauf der Schleifscheibe.So far, grinding wheels for their use on grinding machines have been pushed onto the mandrel or supporting part of a supporting flange and fixed in their end position with the aid of, for example, a clamping flange (US-A-2 497 217). The main disadvantage of this known grinding wheel clamping device is that it is difficult to place the grinding wheel on the supporting part because of the low tolerance, especially when the grinding wheel is slightly inclined and tilted on the supporting part, after which a further placement is impossible and moreover at one Tilting also damages the bore of the grinding wheel. This results in a further disadvantage of a non-centric running of the grinding wheel.

Weiterhin ist eine Spannvorrichtung für einen Schleifring mit den vorstehend genannten Nachteilen bekannt (FR-A- 445,807), bei welcher mit Keilen im Tragflansch und Nuten im Schleifring eine solche Verbindung zwischen diesen Teilen hergestellt werden soll, daß ein Bersten des Schleifringes vermieden wird.Furthermore, a tensioning device for a slip ring with the above-mentioned disadvantages is known (FR-A-445,807), in which wedges in the supporting flange and grooves in the slip ring are to be used to make such a connection between these parts that the slip ring is prevented from bursting.

In der US-A- 1 661 861 ist eine Vorrichtung zum Befestigen einer rotierenden Schleifscheibe an einem Flansch einer biegsamen Welle beschrieben, wobei die Schleifscheibe und der Flansch an Vorsprüngen befindliche gekrümmte und hinterschnittene Flächen aufweisen, welche bei Verdrehen der Schleifscheibe gegen den Flansch zur gegenseitigen Anlage kommen und somit ein Festspannen bewirken, das von sich durch den Flansch erstreckende Schrauben noch erhöht werden kann. Abgesehen davon, daß diese Flächen einen besonderen Aufwand bei der Herstellung des Flansches und der Scheibe erfordern, ist mit dieser Anordnung ein genaues Zentrieren der Schleifscheibe auf dem Flansch weder angesprochen noch möglich.US-A-1 661 861 describes a device for fastening a rotating grinding wheel to a flange of a flexible shaft, the grinding wheel and the flange having curved and undercut surfaces on protrusions which, when the grinding wheel rotates relative to the flange, in relation to one another Coming system and thus cause a tightening, which can be increased by bolts extending through the flange. Apart from the fact that these surfaces require a special effort in the manufacture of the flange and the wheel, with this arrangement an exact centering of the grinding wheel on the flange is neither addressed nor possible.

Die der Erfindung zugrundeliegende Aufgabe besteht darin, eine Zentriervorrichtung für einen Schleifring so weiterzubilden, daß es in einfacher Weise gelingt, den billiger als bisher herstellbaren Schleifring mit großem Spiel und damit leicht auf den Tragflansch aufzusetzen, vor dem Festspannen jedoch ein geringes Spiel einzustellen, um eine gute Zentrierung und einen einwandfreien Rundlauf zu erzielen.The object of the invention is to develop a centering device for a slip ring in such a way that it is possible in a simple manner to place the slip ring, which is cheaper to manufacture than before, with a large amount of play and thus easily onto the supporting flange, but to set a slight play before tightening to achieve a good centering and a perfect concentricity.

Diese Aufgabe wird gemäß Erfindung dadurch gelöst, daß der die Keile umschließende Radius nur wenig kleiner als der Bohrungsradius des Schleifringes ist.This object is achieved according to the invention in that the radius surrounding the wedges is only slightly smaller than the bore radius of the slip ring.

Vorzugsweise sind jeweils drei gleichmäßig über den Umfang verteilte Keile vorgesehen.Preferably, three wedges are provided that are evenly distributed over the circumference.

Zweckmäßig ist die Toleranz zwischen den Radien maximal 5 11m.The maximum tolerance between the radii is 5 11m.

Der wesentliche Vorteil dieser erfindungsgemäßen Zentriervorrichtung für insbesondere Schleifringe mit kubischem Bornitrid besteht darin, daß bei der hier in Rede stehenden Toleranz von Bohrung der Schleifscheibe zum Durchmesser des Tragteils im Bereich von 5 11m die Schleifscheibe mittels herkömmlicher Verfahren zwar nicht mehr montiert werden kann, mit dem erfindungsgemäßen Vorschlag es indessen ein leichtes ist, den Schleifring auf das Tragteil aufzuschieben, wenn die Nuten des Schleifringes mit den Keilen am Umfang des Tragteils ausgerichtet sind. Nach Erreichen der achsensenkrechten Lage des Schleifringes braucht dann der Schleifring lediglich gedreht zu werden, so daß die geforderte Passung hergestellt wird. In dieser Lage wird der Schleifring in der üblichen Weise zwischen Trag-und Spannflansch eingespannt.The main advantage of this centering device according to the invention for, in particular, slip rings with cubic boron nitride is that, given the tolerance of bore of the grinding wheel to the diameter of the supporting part in the range of 5 11 m, the grinding wheel can no longer be mounted using conventional methods, with the proposal according to the invention, however, it is easy to slide the slip ring onto the support part if the grooves of the slip ring are aligned with the wedges on the circumference of the support part. After reaching the position of the slip ring perpendicular to the axis, the slip ring then only needs to be rotated so that the required fit is produced. In this position, the slip ring is clamped in the usual way between the support flange and the clamping flange.

Gemäß einem weiteren Lösungsvorschlag für die obengenannte Aufgabe kann zweckmäßig so vorgegangen werden, daß das Querschnittsprofil jedes Keiles von einem kleineren Radius, der kleiner als der Bohrungsradius des Schleifrings ist, stetig auf einen größeren Radius ansteigt, der größer als der Bohrungsradius ist.According to a further solution for the above-mentioned task, it can be expedient to proceed in such a way that the cross-sectional profile of each wedge increases continuously from a smaller radius that is smaller than the bore radius of the slip ring to a larger radius that is larger than the bore radius.

Das Zentrieren erfolgt dadurch, daß sich die Keile mit ihren im Querschnittsprofil ansteigenden Außenkonturen wie keilartig schiefe Ebenen an Nutränder des Schleifrings anlegen, wodurch dieser, von den keilartig schiefen Ebenen gesteuert, in die genau zentrierte Stellung rutscht. Da diese Zentrierungsart ohne einen engen konzentrischen Sitz der Keile in der Schleifringbohrung auskommt, entfällt hier die Notwendigkeit, Schleifringe mit engen Radialtoleranzen zu verwenden. Schleifringe mit relativ weiten Radialtoleranzen lassen sich vergleichsweise billig herstellen.The centering takes place in that the wedges, with their outer contours increasing in cross-sectional profile, lay like wedge-like inclined planes on groove edges of the slip ring, whereby this, controlled by the wedge-like inclined planes, slips into the exactly centered position. Because this type of centering without a tight concentric fit of the wedges in the slip ring bore , there is no need to use slip rings with narrow radial tolerances. Slip rings with relatively wide radial tolerances can be manufactured comparatively cheaply.

Zweckmäßig hat jeder Keil eine vom kleineren Radius auf den größeren Radius ansteigende Kontur in Form eines Kreisbogens mit dem Radius, dessen Krümmungsmittelpunkt um eine Exzentrizität vom Mittelpunkt des Tragteiles des Tragflansches seitlich versetzt ist. Das hat die weiteren Vorteile, daß die Zentrierung mit größer werdenden Schleifringtoleranzen etwas weicher wird und die Fertigung der im Querschnitt ansteigenden Keilprofile auf den in der Fertigung gebräuchlichen Fräsmaschinen ohne komplizierte Spezialvorrichtungen möglich ist.Each wedge expediently has a contour increasing from the smaller radius to the larger radius in the form of a circular arc with the radius whose center of curvature is offset laterally by an eccentricity from the center of the supporting part of the supporting flange. This has the further advantages that the centering becomes somewhat softer with increasing slip ring tolerances and that the wedge profiles that increase in cross-section can be produced on the milling machines commonly used in production without complicated special devices.

Vorteilhaft steigt bei jedem Keil die Kontur entgegen der Drehrichtung des Tragteiles an.With each wedge, the contour advantageously increases counter to the direction of rotation of the supporting part.

Auch bei der so ausgebildeten Zentriervorrichtung wird das Drehmoment reibschlüssig vom Tragflansch auf den fest dagegen gespannten Schleifring übertragen. Deshalb sind diejenigen Stellen, an denen die Keile noch vom Zentrieren her an den Nuträndern anliegen, von der Drehkraftübertragung entlastet, und der Schleifring könnte insoweit in beiden Drehrichtungen laufen. In dem normalerweise nicht auftretenden Fall jedoch, daß sich aus irgendwelchen Gründen die Anpressung des Schleifrings an den Tragflansch lockert, würde eine Ablösung der Keile von den Nuträndern die Zentrierung aufheben, so daß die sofort auftretende große Unwucht zu schweren Schaden oder gar Unfällen führen müßte. Die erfindungsgemäße Zentriervorrichtung verhindert dies, weil auch in einem solchen Notfall die Zentrierung aufrechterhalten und damit das Auftreten einer gefährlichen Unwucht vermieden wird.Even with the centering device designed in this way, the torque is frictionally transmitted from the supporting flange to the slip ring which is firmly clamped against it. Therefore, the points where the wedges are still centered on the groove edges are relieved of the torque transmission, and the slip ring could run in both directions. In the normally non-existent case, however, that the pressing of the slip ring on the supporting flange loosens for some reason, a detachment of the wedges from the groove edges would remove the centering, so that the immediately occurring large unbalance would lead to serious damage or even accidents. The centering device according to the invention prevents this because in such an emergency the centering is maintained and the occurrence of a dangerous imbalance is avoided.

Bei beiden Lösungsvorschlägen sind vorzugsweise drei Keile über den gesamten Umfang des Tragteiles des Tragflansches gleichmäßig verteilt. So wie Stühle mit drei Beinen niemals wackeln, kann sich auch ein Tragteil mit drei gleichmäßig verteilten Keilen an drei und nur drei gleichmäßig verteilte Stellen des Schleifrings anlegen.In both proposed solutions, preferably three wedges are evenly distributed over the entire circumference of the supporting part of the supporting flange. Just as chairs with three legs never wobble, a supporting part with three evenly spaced wedges can rest on three and only three equally spaced locations on the slip ring.

Ein besonderer Vorteil dieser Ausbildung der Zentriervorrichtung besteht darin, daß sie nicht nur das leichte Aufschieben und genaue Zentrieren, sondern auch die billigere Herstellung der Schleifringe gestattet, nämlich solcher mit weiteren Radialtoleranzen.A particular advantage of this design of the centering device is that it allows not only easy sliding on and precise centering, but also cheaper manufacture of the slip rings, namely those with further radial tolerances.

Weitere Vorteile ergeben sich aus der nachfolgenden Erläuterung der Erfindung an Ausführungsbeispielen anhand der beigefügten Zeichnung. In der Zeichnung zeigen:

  • Fig. 1 eine teilweise geschnittene Seitenansicht einer Anordnung von Schleifring und Zentriervorrichtung
  • Fig. 2 eine Detailansicht des Bereiches "x" in Fig. 3,
  • Fig. 3 eine im Schnitt gezeigte Relativlage von Schleifscheibe zum Tragteil des Tragflansches während der Montage des Schleifringes
  • Fig. 4 eine der Fig. 3 ähnliche Ansicht, wobei jedoch der Schleifring gegenüber dem Tragteil gedreht worden ist,
  • Fig. 5 einen Schnitt durch die Zentriervorrichtung nach einem weiteren Vorschlag längs der Linie A-A in Fig. 1, in Zentrierposition und
  • Fig. 6 einen Ausschnitt aus Fig. 5, jedoch in Aufschiebeposition, in größerem Maßstab.
Further advantages result from the following explanation of the invention using exemplary embodiments with reference to the attached drawing. The drawing shows:
  • Fig. 1 is a partially sectioned side view of an arrangement of slip ring and centering device
  • 2 is a detailed view of the area "x" in Fig. 3,
  • Fig. 3 shows a sectional position shown in section of the grinding wheel to the supporting part of the support flange during assembly of the slip ring
  • 4 is a view similar to FIG. 3, but with the slip ring rotated relative to the support member,
  • Fig. 5 shows a section through the centering device according to a further proposal along the line AA in Fig. 1, in the centering position and
  • Fig. 6 shows a detail from Fig. 5, but in the deferral position, on a larger scale.

In Fig. 1 ist ein Schleifring 1 gezeigt, welcher mit seiner Bohrung 10 auf dem Tragteil 3 einer Zentriervorrichtung auf einer Antriebswelle 4 sitzt. Das Tragteil 3 ist Teil des Tragflansches 5, welcher eine ebene Ringfläche als Spannfläche 6 aufweist die genau rechtwinklig zur Längsachse der Antriebswelle 4 angeordnet ist.In Fig. 1, a slip ring 1 is shown, which sits with its bore 10 on the support member 3 of a centering device on a drive shaft 4. The support part 3 is part of the support flange 5, which has a flat annular surface as a clamping surface 6, which is arranged exactly at right angles to the longitudinal axis of the drive shaft 4.

Nach Fig. 1 wird der Schleifring 1 auf dem Tragteil 3 mit Hilfe eines Spannflansches 2 gehalten, der mit dem Tragflansch 5 verschraubt ist.1, the slip ring 1 is held on the support part 3 with the aid of a clamping flange 2 which is screwed to the support flange 5.

Eine Bohrung 10 mit dem Innenradius B, weist, wie dies deutlich in Fig. 2 bis 5 gezeigt ist, drei in gleichem Abstand voneinander angeordnete achsparallele Nuten 8 auf, während am Umfang des Tragteils 3 ebenfalls gleichmäßig beabstandete Keile 9 vorgesehen sind, die etwas schmaler als die Nuten 9 des Schleifringes 1 sind. Die Zylinderflächen darstellenden Außenflächen der Keile 9 liegen auf dem Radius D" der nur wenig kleiner als der Radius B, ist. Der Schleifring 1 kann zunächst also mit so großem Spiel auf das Tragteil 3 geschoben werden, daß sich Schleifring und Tragteil kaum berühren. Bei Anliegen des Schleifringes 1 mit seiner Stirnfläche 7 an dem Tragflansch 5 ist die Rechtwinkligkeit des Schleifringes zur Drehachse exakt gegeben. Danach wird der Schleifring 1 gegenüber dem Flansch 5 mit seinem Tragteil 3 gedreht, bis die in Fig. 4 gezeigte Lage erreicht ist. Schließlich erfolgt die als solche bekannte Fixierung des Schleifringes an der Zentriervorrichtung, beispielsweise mit Hilfe des in Fig. 1 gezeigten Spannflansches 2.A bore 10 with the inner radius B has, as is clearly shown in FIGS. 2 to 5, three axially parallel grooves 8 arranged at the same distance from one another, while on the circumference of the supporting part 3 there are likewise equally spaced wedges 9 which are somewhat narrower than the grooves 9 of the slip ring 1 are. The outer surfaces of the wedges 9, which represent cylindrical surfaces, lie on the radius D "which is only slightly smaller than the radius B. The slip ring 1 can therefore be pushed onto the support part 3 with so much play that the slip ring and the support part hardly touch The right angle of the slip ring to the axis of rotation is exactly given when the slip ring 1 rests with its end face 7 on the support flange 5. The slip ring 1 is then rotated with respect to the flange 5 with its support part 3 until the position shown in Fig. 4 is reached the known fixing of the slip ring on the centering device, for example with the aid of the clamping flange 2 shown in FIG. 1.

Damit ist gewährleistet, daß der Schleifring genau rund läuft und auch bei seiner Montage nicht beschädigt werden kann, da die Montage äußerst einfach ist, andererseits der Radius D, der Keile 9 (siehe Fig. 2) nahezu gleich dem Radius B, der Schleifscheiben-Bohrung ist, und somit die Zentrierung vom Schleifring am Tragteil im jim-Bereich erfolgt.This ensures that the slip ring runs exactly and cannot be damaged even when it is being installed, since the assembly is extremely simple, on the other hand the radius D, the wedges 9 (see FIG. 2) are almost equal to the radius B, the grinding wheel Hole is, and thus the centering of the slip ring on the support part in the jim area.

Die in Fig. 5 und 6 gezeigte Zentriervorrichtung gemäß einem weiteren Lösungsvorschlag dient ebenfalls einem Zentrieren des Schleifrings 1, der aus Bornitrid mit geeigneter Bindung gebildet ist und erfahrungsgemäß sehr empfindlich gegenüber Unwucht ist. Diese Vorrichtung besteht aus der Antriebswelle 4, dem Tragflansch 5, dem Tragteil 3, dem Lagerzapfen und dem Spannflansch 2.The centering device shown in FIGS. 5 and 6 according to a further proposed solution also serves to center the slip ring 1, which is formed from boron nitride with a suitable bond and, according to experience, is very sensitive to imbalance. This device consists of the drive shaft 4, the supporting flange 5, the supporting part 3, the bearing journal and the clamping flange 2.

Beim Einsetzen eines Schleifrings 1 wird dieser auf den Tragteil 3 des Tragflansches 5 geschoben, bis der Schleifring 1 an der Spannfläche 6 zur Anlage kommt. Dann wird der Spannflansch 2 auf einen Zapfen des Tragflansches 5 geschoben, bis er am Schleifring 1 zur Anlage kommt. Schließlich wird der Schleifring 1 zentriert und der Spannflansch 2 mittels (in Fig. 1 strichpunktiert angedeuteter) Schrauben fest gegen den Tragflansch 5 gezogen. Dadurch wird der Schleifring 1 festgespannt und bei Drehung der Antriebswelle 4 durch seinen Reibschluß zwischen den Flanschen 2 und 5 mitgenommen.When a slip ring 1 is inserted, it is pushed onto the support part 3 of the support flange 5 until the slip ring 1 comes into contact with the clamping surface 6. Then the Clamping flange 2 pushed onto a pin of the support flange 5 until it comes into contact with the slip ring 1. Finally, the slip ring 1 is centered and the clamping flange 2 is pulled firmly against the supporting flange 5 by means of screws (indicated by dash-dotted lines in FIG. 1). As a result, the slip ring 1 is tightened and, when the drive shaft 4 rotates, is carried along by its frictional engagement between the flanges 2 and 5.

Der Schleifring 1 weist nach Fig. 5 und 6 in der Bohrung 10 drei ebenfalls achsparallele Nuten 8 auf, die gleichmäßig verteilt sind, also um jeweils 120° gegeneinander versetzt liegen. Der Tragteil 3 des Tragflansches 5 trägt drei Keile 11, 12 und 13, die ebenfalls gleichmäßig verteilt um jedes 120° gegeneinander versetzt liegen. Das Querschnittsprofil eines jeden Keils 11, 12 und 13 (vgl. Keil 11 in Fig. 5 und 6) steigt von einem kleineren Radius R1; der kleiner als der Bohrungsradius B, ist, stetig auf einen größeren Radius R2 an, der größer als der Bohrungsradius B, ist. Dadurch wird die Kontur des Keiles 11 zu einer keilartig wirkenden schiefen Ebene, die bei Drehung des Schleifrings 1 im Uhrzeigersinn an den Rand der Nut 8 anläuft. So verhält es sich bei allen drei Keilen 11, 12 und 13. Eine Drehung des Schleifrings 1 im Uhrzeigersinn führt deshalb dazu, daß der Schleifring 1 sich an alle drei Keilkonturen anlegt und, von diesen gesteuert, in die in Fig. 5 gezeigte zentrierte Position rutscht. In dieser Position wird der Schleifring durch Anziehen des Spannflanschs 2 fixiert.5 and 6, the slip ring 1 has, in the bore 10, three likewise axially parallel grooves 8, which are evenly distributed, that is to say offset from one another by 120 ° in each case. The support part 3 of the support flange 5 carries three wedges 11, 12 and 13, which are also equally spaced from each other by 120 °. The cross-sectional profile of each wedge 11, 12 and 13 (cf. wedge 11 in FIGS. 5 and 6) increases from a smaller radius R1; which is smaller than the bore radius B, steadily increases to a larger radius R2 which is larger than the bore radius B. As a result, the contour of the wedge 11 becomes a wedge-like inclined plane, which runs up to the edge of the groove 8 when the slip ring 1 rotates clockwise. This is the case with all three wedges 11, 12 and 13. Rotation of the slip ring 1 clockwise therefore means that the slip ring 1 lies against all three wedge contours and, controlled by them, into the centered position shown in FIG. 5 slips. In this position, the slip ring is fixed by tightening the clamping flange 2.

Der in Fig 5 und 6 dargestellte weitere Lösungsvorschlag ermöglicht also, wie Fig. 6 zeigt, ein leichtes Aufschieben mit weitem Spiel, während er eine genaue Zentrierung ermöglicht, ohne daß der Tragteil 3 des Tragflansches 5 einen engen konzentrischen Sitz in der Schleifringbohrung 7 haben müßte. Vielmehr stellt sich der für das Zentrieren erforderliche enge "Sitz" zwischen den ansteigenden Konturen der Keile 11, 12 und 13 sowie den Rändern der Nuten 8 ein. So wird die Verwendung von Schleifringen 1 mit relativ großen Radialtoleranzen in den Schleifringbohrungen 7 möglich. Solche Schleifringe sind, weil ihre Bohrungen eine große Radialtoleranz haben dürfen, in der Herstellung billiger als bisher übliche Schleifringe.The further proposed solution shown in FIGS. 5 and 6 thus enables, as shown in FIG. 6, an easy pushing on with a large amount of play, while allowing precise centering without the support part 3 of the support flange 5 having to have a tight concentric fit in the slip ring bore 7 . Rather, the tight "fit" required for centering occurs between the rising contours of the wedges 11, 12 and 13 and the edges of the grooves 8. The use of slip rings 1 with relatively large radial tolerances in the slip ring bores 7 is thus possible. Such slip rings are, because their bores may have a large radial tolerance, less expensive to manufacture than previously conventional slip rings.

Die Drehrichtung der Zentriervorrichtung ist in Fig. 6 mit einem Pfeil 15 bezeichnet. Es ist zweckmäßig, daß die Kontur der Keile entgegen der Drehrichtung gemäß dem Pfeil 15 ansteigt, daß also z.B. beim Keil 11 der kleinere Radius R1 voranläuft.The direction of rotation of the centering device is indicated by an arrow 15 in FIG. 6. It is expedient that the contour of the wedges increases counter to the direction of rotation according to arrow 15, e.g. with the wedge 11 the smaller radius R1 runs ahead.

Das Ansteigen der Keilkontur vom kleineren Radius R1 auf den größeren Radius R2 kann auf verschiedene Weise realisiert werden. Im Prinzip ist sogar ein lineares Ansteigen möglich. Eine fertigungstechnisch besonders einfache Lösung zeigt Fig. 6. Danach ist die Kontur des Keils 11 kreisbogenförmig, wobei jedoch der Krümmungsmittelpunkt M2 des Kreisbogens mit dem Radius R um die Exzentrizität x vom Mittelpunkt M1 des Tragteiles 3 des Tragflansches 5 seitlich versetzt ist.The wedge contour can be increased from the smaller radius R1 to the larger radius R2 in various ways. In principle, a linear increase is even possible. 6 shows a particularly simple solution in terms of production technology. Thereafter, the contour of the wedge 11 is in the form of a circular arc, but the center of curvature M2 of the circular arc with the radius R is offset laterally by the eccentricity x from the center M1 of the supporting part 3 of the supporting flange 5.

Claims (7)

1. Centering device for a metal slip ring (1) which is provided with a slip covering on its outer periphery, having a tensioning flange (2) and a supporting flange (5), the support means (3) for said supporting flange having a plurality of radially protruding wedges (a) which extend over its length and are associated with corresponding grooves (8) in the bore (10) in the slip ring (1), characterised in that the radius (D1) surrounding the wedges (9) is only slightly smaller than the bore radius (B1) of the slip ring (1),
2. Centering device according to Claim 1, characterised in that three wedges (9) are distributed uniformly over the periphery.
3. Centering device according to Claim 1 or 2, characterised in that the maximum difference between the radii (D1; B1) is 5 4m.
4. Centering device for a metal slip ring (1) which is provided with a slip covering on its outer periphery, having a tensioning flange and a supporting flange (5), the support means (3) for said supporting flange having a plurality of radially protruding wedges (11, 12, 13) which extend over its length and are associated with corresponding grooves (8) in the bore in the slip ring, characterised in that the cross-sectional profile of each wedge (11, 12, 13) always increases from a smaller radium (R1), which is smaller than the bore radius (B1) of the slip ring (1), to a greater radius (R2) which is greater than the bore radius (B1).
5. Centering device according to Claim 4, characterised in that each wedge (11, 12, 13) has a configuration which increases from the smaller radius (R1) to the greater radius (R2) and is in the form of an arc having the radius (R), the centre of curvature (M2) of said radius being laterally displaced by an eccentricity (x) from the centre (M1) of the support means (3) for the supporting flange (5).
6. Centering device according to Claim 4, characterised in that, in the case of each wedge (11, 12, 13), the configuration increases in opposition to the direction of rotation (15) of the support means (3).
7. Centering device according to Claim 1 or 4, characterised in that three wedges (11, 12, 13) are uniformly distributed over the periphery of the support means (3) for the supporting flange (5).
EP84106731A 1983-06-21 1984-06-13 Clamping device for a ring wheel Expired EP0132567B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106731T ATE27237T1 (en) 1983-06-21 1984-06-13 CLAMPING DEVICE FOR A SLIP RING.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3322258 1983-06-21
DE19833322258 DE3322258C1 (en) 1983-06-21 1983-06-21 Clamping device for a grinding ring
DE19843405556 DE3405556C1 (en) 1984-02-16 1984-02-16 Clamping device for a cylinder wheel
DE3405556 1984-02-16

Publications (2)

Publication Number Publication Date
EP0132567A1 EP0132567A1 (en) 1985-02-13
EP0132567B1 true EP0132567B1 (en) 1987-05-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106731A Expired EP0132567B1 (en) 1983-06-21 1984-06-13 Clamping device for a ring wheel

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US (1) US4577440A (en)
EP (1) EP0132567B1 (en)

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DE3823591A1 (en) * 1987-12-23 1989-07-06 Fortuna Werke Maschf Ag GRINDING WHEEL
DE4317277C2 (en) * 1993-05-25 1996-05-23 Bayerische Motoren Werke Ag Device for the aligned arrangement of rotatable shaft end sections to be connected to one another
US6230600B1 (en) 1996-07-12 2001-05-15 Precision Arbor Systems, Inc. Saw arbor and guided circular saw
US5901629A (en) * 1996-07-12 1999-05-11 Precision Arbour Systems, Inc. Saw arbor and guided circular saw
US5997390A (en) * 1998-02-02 1999-12-07 Speedfam Corporation Polishing apparatus with improved alignment of polishing plates
USD424076S (en) * 1999-02-24 2000-05-02 Black & Decker Inc. Mounting device for a cutting tool
USD417598S (en) * 1999-02-24 1999-12-14 Black & Decker Inc. Rotatable cutting tool
DE102004061871B4 (en) * 2004-12-22 2007-05-31 Erwin Junker Maschinenfabrik Gmbh Clamping device with centering device on a grinding spindle rotor and rotating part with such a centering device
CN100534720C (en) * 2008-05-07 2009-09-02 常熟市中恒数控设备制造有限公司 Grinding machine spindle end mechanism
DE202008011959U1 (en) * 2008-08-29 2010-02-11 C. & E. Fein Gmbh Adapter for attaching a tool to an oscillating drive
DE102018206641A1 (en) * 2018-04-27 2019-10-31 Robert Bosch Gmbh Device and method for cutting a product, in particular confectionery mass

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DE7212119U (en) * 1972-10-26 Graupner F Device for attaching rotating grinding tools to a flange
FR445807A (en) * 1912-07-06 1912-11-20 Jeremie Frederic Louis Doucet Improvements to emery wheels to make them impossible to burst
US1661861A (en) * 1925-06-23 1928-03-06 Carborundum Co Grinding wheel and holder therefor
US2255885A (en) * 1939-09-05 1941-09-16 Charles J Steidl Device for securing saws and other appliances to arbors
US2497217A (en) * 1947-03-08 1950-02-14 Walter J T Hall Holder for rotary tools with center holes of different sizes
US2577042A (en) * 1951-02-24 1951-12-04 Speicher Elmer Truing and balancing device for face type diamond grinding wheels
US2855731A (en) * 1956-12-26 1958-10-14 Super Cut Truing device for peripheral type grinding wheels
DE1167644B (en) * 1957-05-15 1964-04-09 Karl Rud Dienes Fabrikationsge Device for fastening circular knives on the associated shaft part of longitudinal cutting machines for paper webs or the like.
US3353306A (en) * 1964-01-31 1967-11-21 Norton Co Hub mounting for grinding wheels
US3613472A (en) * 1970-08-12 1971-10-19 Gerhard R Held Honing gear assembly
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US4577440A (en) 1986-03-25
EP0132567A1 (en) 1985-02-13

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