EP1832389B1 - Expansion roller with individual sections - Google Patents
Expansion roller with individual sections Download PDFInfo
- Publication number
- EP1832389B1 EP1832389B1 EP20070003813 EP07003813A EP1832389B1 EP 1832389 B1 EP1832389 B1 EP 1832389B1 EP 20070003813 EP20070003813 EP 20070003813 EP 07003813 A EP07003813 A EP 07003813A EP 1832389 B1 EP1832389 B1 EP 1832389B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spokes
- expansion roller
- sectors
- expansion
- roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005498 polishing Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/02—Expansible drums for carrying flexible material in tubular form, e.g. expanded by centrifugal force
Definitions
- the invention relates to an expansion roller for receiving a grinding or polishing sleeve.
- Such expansion rollers are used to mount flexible grinding or polishing sleeves on a drive shaft of a surface or longitudinal grinder.
- work area or longitudinal grinders with cylindrical tools, such. B. mop wheels or fleece wheels.
- flexible tool sleeves for example, abrasive belt used with such devices.
- Such flexible sleeves are then carried and driven by a roller-shaped adapter.
- expansion rollers often consist of wheels with respect to the radial direction tilted spokes, which set up under centrifugal force.
- the expansion roller In operation with a surface or longitudinal grinder, the expansion roller is rotated. As a result of the centrifugal force, the spokes are raised, whereby the diameter of the expansion roller is increased. The sleeve is thereby stretched and fixed.
- inflatable expansion rollers are known in which an individual hardness adjustment is possible by adjusting the pressure.
- an expansion roll which is formed of elastic material, for receiving a grinding or polishing wheel. It comprises a hollow cylindrical base body from which spokes distributed around the cylinder axis spokes which are tilted in their direction perpendicular to the cylinder axis in each case by a fixed angle relative to the radial direction, wherein they spread during a rotational movement of the expansion roller under centrifugal force.
- the problem with the conventional expansion rollers with the tilted spokes is the interaction of stability of the fixation of the sleeve and the desired degree of hardness.
- a balance is required.
- Soft rollers adapt well to the sleeve and the sleeve is accordingly well tensioned.
- the fixation of the sleeve may not be given to the same extent.
- the sleeves should not sit too tightly on the expansion roller at rest, so that a simple and quick change is possible. This, of course, also affects the fit of the sleeve in the operating state.
- an object of the invention to provide an expansion roller, which at the same time allows a quick and easy change of the sleeves while also ensuring a stable fit of the sleeve on the expansion roller during the operating state.
- An expansion roll according to the invention for receiving a grinding or polishing sleeve is made of an elastic material. It comprises a hollow-cylindrical basic body, from which spokes distributed around the cylinder axis extend, which are tilted in their direction perpendicular to the cylinder axis in each case by a fixed angle relative to the radial direction. During a rotational movement of an expansion roller according to the invention about the cylinder axis, the spokes spread apart under centrifugal force. in each case a plurality of adjacent spokes of an expansion roller according to the invention are connected at its outer end by a cylinder jacket partial surface to form a sector.
- the spokes go over at its outer end in this cylinder jacket surface, much like spokes in a rim.
- the total number of spokes is divided into at least two separate sectors in an expansion roller according to the invention.
- the outer circumferential surface of the expansion roller is also divided into sectors. Between each two sectors, that is to say between adjacent spokes which belong to different sectors, there is then a gap open towards the outer lateral surface.
- the elastic material of the expansion roller is, for example, a rubber.
- the elasticity of the material ensures that the spokes can set up by centrifugal force and can move to the radial direction. Overall, the material should still have a certain stability, so that the roller is relatively rigid in the axial direction. Due to the inventive division of the spokes and subdivision of the outer lateral surface in sectors but also a certain compressibility of the expansion roller is achieved. This allows a simple change even from relatively tight-fitting sleeves. To raise the sleeve on the expansion roller, the expansion roller can be slightly compressed by pressure on the lateral surface in its diameter. As a result, tight-fitting sleeves can be changed easily.
- the gaps between the sectors in turn allow increased expansion of the roller and thus better fixation of the sleeves.
- the spokes in the individual sectors can better set up in the expansion roller according to the invention.
- the sleeve is thereby stretched during operation stronger and is then held by friction and clamping fit against rotation on the expansion roller.
- the spokes are divided into three sectors of equal size.
- the individual sectors are of equal size.
- the formation of imbalances can be avoided.
- the above advantages are further enhanced by the subdivision. In principle, a higher number of sectors is possible.
- the expansion roller in the passage opening in the hollow cylindrical body is expediently equipped with a fastening device.
- a fastening device may be, for example, an internal thread or a double keyway.
- the expansion roller can be rotatably connected to a corresponding drive shaft. The rotational movement will then be transmitted via the expansion roller a grinding or polishing sleeve.
- the sleeves correspond in shape to a short piece of hose whose length corresponds to the length of the expansion roller. Its diameter is only slightly larger than that of the expansion roller at rest, so that the sleeve can then simply be pushed over this for mounting.
- Grinding or polishing sleeves for use with an expansion roll according to the invention may consist, for example, of abrasive tape, fleece or felt. They are suitable for applications such as polishing, grinding or matting of various materials, such as wood, metal, stainless steel or plastic.
- the expansion roller 10 comprises a hollow cylindrical base body 11 with a passage opening 16 in which a fastening device is located. From the hollow cylindrical body 11 go 21 spokes 13. The spokes are separated by channels 14. Each seven spokes are connected via an outer cylinder part surface 15 with each other to a sector. The channels between two adjacent spokes, which belong to different sectors, are open to the outer cylinder jacket surface as a gap 17. The outer cylindrical surface of the expansion roller is therefore divided by the column 17 into three sectors 15. Hollow-cylindrical body, spokes and outer part-shell surfaces can be molded in one piece. The individual spokes 13 have a cross-section at the starting point has the smallest width on the hollow cylindrical base body 11.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Description
Die Erfindung betrifft eine Expansionswalze zur Aufnahme einer Schleif- oder Polierhülse. Solche Expansionswalzen werden eingesetzt um flexible Schleif- oder Polierhülsen auf einer Antriebswelle eines Flächen- oder Längsschleifgerätes zu montieren. Üblicherweise arbeiten Flächen- oder Längsschleifgeräte mit walzenförmigen Werkzeugen, wie z. B. Moprädern oder Vliesrädern. Für bestimmte Anwendung werden aber auch flexible Werkzeughülsen beispielsweise aus Schleifband mit solchen Geräten verwendet. Solche flexible Hülsen werden dann von einem walzenförmigen Adapter getragen und angetrieben. Für diesen Zweck gibt es verschiedene Expansionswalzen, auf welche die flexiblen Hülsen wie eine Manschette aufgeschoben werden. Durch eine Expansion der Walze und einer Vergrößerung ihres Durchmessers wird die Hülse dann fest auf die Walze gespannt. Solche Expansionswalzen bestehen häufig aus Rädern mit gegenüber der radialen Richtung verkippten Speichen, die sich unter Fliehkrafteinwirkung aufstellen. Im Betrieb mit einem Flächen- oder Längsschleifgerät wird die Expansionswalze in Rotation versetzt. Infolge der Fliehkraft stellen sich die Speichen auf, wodurch der Durchmesser der Expansionswalze vergrößert wird. Die Hülse wird dadurch gespannt und fixiert. Neben den genannten sind auch aufblasbare Expansionswalzen bekannt, bei denen durch die Anpassung des Drucks eine individuelle Härte-Einstellung möglich ist.The invention relates to an expansion roller for receiving a grinding or polishing sleeve. Such expansion rollers are used to mount flexible grinding or polishing sleeves on a drive shaft of a surface or longitudinal grinder. Usually work area or longitudinal grinders with cylindrical tools, such. B. mop wheels or fleece wheels. For certain applications but also flexible tool sleeves, for example, abrasive belt used with such devices. Such flexible sleeves are then carried and driven by a roller-shaped adapter. For this purpose, there are various expansion rollers on which the flexible sleeves are pushed like a cuff. By an expansion of the roller and an increase in its diameter, the sleeve is then clamped firmly on the roller. Such expansion rollers often consist of wheels with respect to the radial direction tilted spokes, which set up under centrifugal force. In operation with a surface or longitudinal grinder, the expansion roller is rotated. As a result of the centrifugal force, the spokes are raised, whereby the diameter of the expansion roller is increased. The sleeve is thereby stretched and fixed. In addition to the mentioned inflatable expansion rollers are known in which an individual hardness adjustment is possible by adjusting the pressure.
Aus Dokument
Problematisch bei den herkömmlichen Expansionswalzen mit den verkippten Speichen ist das Zusammenwirken von Stabilität der Fixierung der Hülse und dem gewünschten Härtegrad. Hierbei ist eine Abwägung erforderlich. Weiche Walzen passen sich gut an die Hülse an und die Hülse wird dementsprechend gut gespannt. Bei einer harten Walze dagegen ist unter Umständen die Fixierung der Hülse nicht in demselben Maße gegeben. Andererseits sollen die Hülsen im Ruhezustand nicht zu straff auf der Expansionswalze sitzen, damit ein einfaches und schnelles Wechseln möglich ist. Dies wiederum beeinflusst natürlich auch den Sitz der Hülse im Betriebszustand.The problem with the conventional expansion rollers with the tilted spokes is the interaction of stability of the fixation of the sleeve and the desired degree of hardness. Here, a balance is required. Soft rollers adapt well to the sleeve and the sleeve is accordingly well tensioned. In contrast, with a hard roller, the fixation of the sleeve may not be given to the same extent. On the other hand, the sleeves should not sit too tightly on the expansion roller at rest, so that a simple and quick change is possible. This, of course, also affects the fit of the sleeve in the operating state.
Vor diesem Hintergrund ist es Aufgabe der Erfindung, eine Expansionswalze anzugeben, welche gleichzeitig einen schnellen und einfachen Wechsel der Hülsen ermöglicht und dabei auch einen stabilen Sitz der Hülse auf der Expansionswalze während des Betriebszustandes gewährleistet.Against this background, it is an object of the invention to provide an expansion roller, which at the same time allows a quick and easy change of the sleeves while also ensuring a stable fit of the sleeve on the expansion roller during the operating state.
Die Aufgabe wird durch die Erfindung gemäß dem unabhängigen Anspruch gelöst. Eine erfindungsgemäße Expansionswalze zur Aufnahme einer Schleif- oder Polierhülse ist aus einem elastischen Material hergestellt. Sie umfasst einen hohlzylindrischen Grundkörper, von dem um die Zylinderachse verteilt Speichen ausgehen, die in ihrer Richtung senkrecht zur Zylinderachse jeweils um einen festen Winkel gegenüber der radialen Richtung verkippt sind. Bei einer Rotationsbewegung einer erfindungsgemäßen Expansionswalze um die Zylinderachse spreizen sich die Speichen unter Fliehkrafteinwirkung auf. jeweils mehrere benachbarte Speichen einer erfindungsgemäßen Expansionswalze sind dabei an ihrem äußeren Ende durch eine Zylindermantel-Teilfläche zu einem Sektor verbunden. Die Speichen gehen an ihrem äußeren Ende in diese Zylindermantel-Teilfläche über, ähnlich wie Speichen in eine Felge. Die Gesamtzahl der Speichen ist bei einer erfindungsgemäßen Expansionswalze auf mindestens zwei getrennte Sektoren aufgeteilt. Dadurch ist die äußere Mantelfläche der Expansionswalze ebenfalls in Sektoren unterteilt. Zwischen jeweils zwei Sektoren, das heißt zwischen benachbarten Speichen, welche zu unterschiedlichen Sektoren gehören, befindet sich dann ein zur äußeren Mantelfläche hin offener Spalt.The object is solved by the invention according to the independent claim. An expansion roll according to the invention for receiving a grinding or polishing sleeve is made of an elastic material. It comprises a hollow-cylindrical basic body, from which spokes distributed around the cylinder axis extend, which are tilted in their direction perpendicular to the cylinder axis in each case by a fixed angle relative to the radial direction. During a rotational movement of an expansion roller according to the invention about the cylinder axis, the spokes spread apart under centrifugal force. in each case a plurality of adjacent spokes of an expansion roller according to the invention are connected at its outer end by a cylinder jacket partial surface to form a sector. The spokes go over at its outer end in this cylinder jacket surface, much like spokes in a rim. The total number of spokes is divided into at least two separate sectors in an expansion roller according to the invention. As a result, the outer circumferential surface of the expansion roller is also divided into sectors. Between each two sectors, that is to say between adjacent spokes which belong to different sectors, there is then a gap open towards the outer lateral surface.
Das elastische Material der Expansionswalze ist beispielsweise ein Gummi. Durch die Elastizität des Materials wird gewährleistet, dass sich die Speichen durch Fliehkrafteinwirkung aufstellen können und zur radialen Richtung hin bewegen können. Insgesamt sollte das Material dennoch eine gewisse Stabilität aufweisen, so dass die Walze in Achsrichtung relativ biegesteif ist. Durch die erfindungsgemäße Aufteilung der Speichen und Unterteilung der äußeren Mantelfläche in Sektoren wird aber auch eine gewisse Kompressibilität der Expansionswalze erreicht. Dies ermöglicht einen einfachen Wechsel auch von relativ straff sitzenden Hülsen. Um die Hülse auf die Expansionswalze aufzuziehen, kann die Expansionswalze durch Druck auf die Mantelfläche in ihrem Durchmesser geringfügig komprimiert werden. Dadurch können auch eng sitzende Hülsen problemlos gewechselt werden. Während des Betriebes in einer Rotationsbewegung ermöglichen die Spalte zwischen den Sektoren wiederum eine verstärkte Expansion der Walze und damit eine bessere Fixierung der Hülsen. Gegenüber einer herkömmlichen Expansionswalze mit durchgehender äußerer Mantelfläche können sich bei der erfindungsgemäßen Expansionswalze die Speichen in den einzelnen Sektoren besser aufstellen. Die Hülse wird dadurch im Betrieb stärker gespannt und ist dann durch Reibung und Spannsitz drehfest auf der Expansionswalze gehaltert.The elastic material of the expansion roller is, for example, a rubber. The elasticity of the material ensures that the spokes can set up by centrifugal force and can move to the radial direction. Overall, the material should still have a certain stability, so that the roller is relatively rigid in the axial direction. Due to the inventive division of the spokes and subdivision of the outer lateral surface in sectors but also a certain compressibility of the expansion roller is achieved. This allows a simple change even from relatively tight-fitting sleeves. To raise the sleeve on the expansion roller, the expansion roller can be slightly compressed by pressure on the lateral surface in its diameter. As a result, tight-fitting sleeves can be changed easily. During operation in a rotational movement, the gaps between the sectors in turn allow increased expansion of the roller and thus better fixation of the sleeves. Compared to a conventional expansion roller with a continuous outer circumferential surface, the spokes in the individual sectors can better set up in the expansion roller according to the invention. The sleeve is thereby stretched during operation stronger and is then held by friction and clamping fit against rotation on the expansion roller.
In einer besonders bevorzugten Ausführungsvariante sind die Speichen auf drei gleich große Sektoren aufgeteilt. Aus Symmetriegründen ist es vorteilhaft, wenn die einzelnen Sektoren gleich groß ausgebildet sind. Dadurch kann die Entstehung von Unwuchten vermieden werden. Bei einer Zahl von drei Sektoren werden die oben genannten Vorteile durch die Unterteilung noch verstärkt. Grundsätzlich ist auch eine höhere Zahl von Sektoren möglich.In a particularly preferred embodiment, the spokes are divided into three sectors of equal size. For reasons of symmetry, it is advantageous if the individual sectors are of equal size. As a result, the formation of imbalances can be avoided. With a number of three sectors, the above advantages are further enhanced by the subdivision. In principle, a higher number of sectors is possible.
Für die Montage auf der Antriebswelle eines Längsschleifers oder einer anderen Antriebsmaschine ist die Expansionswalze in der Durchlassöffnung im hohlzylindrischen Grundkörper zweckmäßig mit einer Befestigungsvorrichtung ausgestattet. Eine solche Befestigungsvorrichtung kann, zum Beispiel, ein Innengewinde oder auch eine Doppelkeilnut sein. Über die Befestigungsvorrichtung kann die Expansionswalze drehfest mit einer entsprechenden Antriebswelle verbunden werden. Die Drehbewegung wird dann über die Expansionswalze eine Schleif- oder Polierhülse übertragen werden. Die Hülsen entsprechen ihrer Form nach einem kurzen Stück Schlauch, dessen Länge der Länge der Expansionswalze entspricht. Ihr Durchmesser ist nur geringfügig größer als der der Expansionswalze im Ruhezustand, so dass die Hülse zur Montage dann einfach über diese geschoben werden kann.For mounting on the drive shaft of a longitudinal grinder or another drive machine, the expansion roller in the passage opening in the hollow cylindrical body is expediently equipped with a fastening device. Such a fastening device may be, for example, an internal thread or a double keyway. About the fastening device, the expansion roller can be rotatably connected to a corresponding drive shaft. The rotational movement will then be transmitted via the expansion roller a grinding or polishing sleeve. The sleeves correspond in shape to a short piece of hose whose length corresponds to the length of the expansion roller. Its diameter is only slightly larger than that of the expansion roller at rest, so that the sleeve can then simply be pushed over this for mounting.
Schleif- oder Polierhülsen zur Verwendung mit einer erfindungsgemäßen Expansionswalze können beispielsweise aus Schleifband, Vlies oder aus Filz bestehen. Sie eignen sich für Anwendungen wie Polieren, Schleifen oder Mattieren von verschiedensten Materialien, beispielsweise Holz, Metall, Edelstahl oder auch Kunststoff.Grinding or polishing sleeves for use with an expansion roll according to the invention may consist, for example, of abrasive tape, fleece or felt. They are suitable for applications such as polishing, grinding or matting of various materials, such as wood, metal, stainless steel or plastic.
Die Erfindung wird nachfolgend anhand des in
- Fig. 1:
- zeigt schematisch eine erfindungsgemäße Expansionswalze mit drei Sektoren.
- Fig. 1:
- schematically shows an expansion roller according to the invention with three sectors.
Die Expansionswalze 10 umfasst einen hohlzylindrischen Grundkörper 11 mit einer Durchlassöffnung 16, in welchem sich eine Befestigungsvorrichtung befindet. Von dem hohlzylindrischen Grundkörper 11 gehen 21 Speichen 13 aus. Die Speichen sind durch Kanäle 14 voneinander getrennt. Jeweils sieben Speichen sind über eine äußere Zylinderteilmantelfläche 15 miteinander zu einem Sektor verbunden. Die Kanäle zwischen zwei benachbarten Speichen, welche zu verschiedenen Sektoren gehören, sind zur äußeren Zylindermantelfläche hin als Spalt 17 geöffnet. Die äußere Zylindermantelfläche der Expansionswalze ist daher durch die Spalte 17 in drei Sektoren 15 unterteilt. Hohlzylindrischer Grundkörper, Speichen und äußere Teilmantelflächen können aus einem Stück geformt sein. Die einzelnen Speichen 13 weisen einen Querschnitt auf, der am Ansatzpunkt am hohlzylindrischen Grundkörper 11 die geringste Breite aufweist. Bei einer Rotationsbewegung der Expansionswalze um die Zylinderachse 12 wirkt eine Zentrifugalkraft auf die Speichen 13, so dass sich die Speichen 13 zur radialen Richtung hin aufspreizen. Durch die besondere Form des Querschnitts der Speichen 13, mit der geringsten Breite am Ansatzpunkt wird ein Abknicken und Aufspreizen der Speichen 13 erleichtert. Den Speichen 13 wird dabei durch die äußere Mantelfläche 15 ein gewisser Widerstand entgegengesetzt, da das Aufspreizen der Speichen 13 eine Dehnung der äußeren Mantelfläche 15 verursacht. Dieser Widerstand wird durch die geöffneten Kanäle 17 zwischen den Sektoren verringert. Die gesamten Sektoren können sich damit leichter aufspreizen. Andererseits ermöglichen die offenen Kanäle 17 auch eine leichte Kompression der Expansionswalze 10, wenn beispielsweise eine Hülse auf die Expansionswalze geschoben werden soll.The
Claims (2)
- An expansion roller (10) made of an elastic material for receiving a grinding or polishing sleeve, comprising a hollow-cylindrical base body (11), from which spokes originate which are distributed about the cylinder axis (12) and which are each tilted in their direction vertically to the cylinder axis (12) by a fixed angle against the radial direction, with the same widening during a rotational movement of the expansion roller (10) about the cylinder axis (12) under the influence of centrifugal force,
characterized in
that several adjacent spokes (13) converge at their outer end into a partial area (15) of the cylinder jacket and are thus joined together into sectors (15), so that the total number of spokes (13) is divided into at least two separate sectors (15). - An expansion roller (10) according to claim 1,
characterized in
that the total number of spokes (13) is divided among at least three sectors of equal size.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200620003662 DE202006003662U1 (en) | 2006-03-08 | 2006-03-08 | Expansion roller with individual sectors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1832389A1 EP1832389A1 (en) | 2007-09-12 |
| EP1832389B1 true EP1832389B1 (en) | 2008-10-29 |
Family
ID=36442340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20070003813 Active EP1832389B1 (en) | 2006-03-08 | 2007-02-23 | Expansion roller with individual sections |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1832389B1 (en) |
| DE (2) | DE202006003662U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6140540B2 (en) * | 2013-06-14 | 2017-05-31 | スリーエム イノベイティブ プロパティズ カンパニー | adapter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH349187A (en) * | 1957-04-18 | 1960-09-30 | Int Precision Wheel Corp | Grinding wheel |
| US3188775A (en) * | 1961-09-25 | 1965-06-15 | William J Cosmos | One piece industrial wheel |
-
2006
- 2006-03-08 DE DE200620003662 patent/DE202006003662U1/en not_active Expired - Lifetime
-
2007
- 2007-02-23 EP EP20070003813 patent/EP1832389B1/en active Active
- 2007-02-23 DE DE200750000192 patent/DE502007000192D1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP1832389A1 (en) | 2007-09-12 |
| DE202006003662U1 (en) | 2006-05-04 |
| DE502007000192D1 (en) | 2008-12-11 |
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