EP1977858B1 - Sanding system - Google Patents

Sanding system Download PDF

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Publication number
EP1977858B1
EP1977858B1 EP07014468A EP07014468A EP1977858B1 EP 1977858 B1 EP1977858 B1 EP 1977858B1 EP 07014468 A EP07014468 A EP 07014468A EP 07014468 A EP07014468 A EP 07014468A EP 1977858 B1 EP1977858 B1 EP 1977858B1
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EP
European Patent Office
Prior art keywords
suction openings
outs
cut
sanding system
suction
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.)
Not-in-force
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EP07014468A
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German (de)
French (fr)
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EP1977858A1 (en
Inventor
Uli Falk
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UFI Schleiftechnik GmbH and Co KG
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UFI Schleiftechnik GmbH and Co KG
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Publication of EP1977858A1 publication Critical patent/EP1977858A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • 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
    • B24D9/08—Circular back-plates for carrying flexible material

Definitions

  • the invention relates to a grinding system according to the preamble of claim 1.
  • a grinding system with the features of the preamble of claim 1 is characterized by the US 2003/032383 A1 known.
  • the US-A-4,616,449 discloses a suction plate for a grinding machine having a support block and having means for spacing the suction plate over the top of the support block, and having an edge bonded to the periphery of the support plate having a relatively narrow peripheral opening between the inner surface of the edge and the peripheral surface of the support block bounded with the lower peripheral edge of the edge terminating with the peripheral edge of the support block, the spacing means comprising foot members on the underside of the support plate, said edge directed up and down the plate, around the narrow peripheral edge Defining opening between the edge and the edge of the support block. At least one opening is provided in the top of the plate to establish communication between the peripheral port and a vacuum source of the grinding machine.
  • the suction plate and the suction block are arranged in a circle, wherein the bottom surface of the support block is provided with at least one circular, concentric openings having channel. The openings in the channel extend therefrom through the support block to establish communication between the concentric channel and the opening in the top of the support plate.
  • a sanding pad for grinding machines which has a support plate with a plurality of openings or openings of circular cross-section. About these breakthroughs the air flow with Schleifmitteistaub, ie through these openings, the resulting during grinding sanding dust or other fine impurities that are incurred during grinding and are removed together with the sanding dust are sucked out using a arranged in or on the grinder suction bell.
  • the EP 1 074 347 A2 describes a grinding wheel for use in a grinding apparatus having a dust removing drive, wherein a number of dust discharge holes are arranged in a main body.
  • the dust discharge holes are arranged at intervals in the main body to drive the discharge of the dust generated during the grinding operation by the in cooperation with the dust discharge holes.
  • the provided in the main body Staubab technologicallöcher have no specially shaped edge areas, so that no aerodynamically favorable design of Schleifstaubabsaug malbrechungen is obtained in order to optimize the air flow with the grinding dust can.
  • a plate-like grinding tool which has a support body with a plurality of passage openings and with a plurality of abrasive segments.
  • openings for the grinding dust provided, which are very large, so that the sanding dust can be sucked off without large residues.
  • the edge regions of the passage openings have edge regions which are sharp-edged, but not ground or chamfered, so that no aerodynamically favorable design of Schleifabsaug malbrechungen be created.
  • the abrasive body has a perforation which is distributed approximately evenly over the entire surface of the abrasive body or at least partially arranged and penetrates at least the abrasive layer having, wherein the distance of the individual perforations forming openings to each other and to the suction of the sanding pad or the Grinding plate is chosen so that a virtually dust-free transport of the grinding dust should be effected.
  • the grinding wheel according to the publication DE 21 45 714 A1 has on its entire surface a perforation forming holes which are regularly distributed over the entire surface and which communicate with the inside of the plate approximately radially extending channels and the other end opens to the outside.
  • DE 44 00 550 A1 is a sanding pad for a machine equipped with dust extraction work, in which the Absaug tellbrüche in the disk body end-side mouth areas have, the openings are widened, so that even with eccentrically placed sanding pads dust flow should be guaranteed.
  • the handle is arranged at the same time serving as a suction housing protective housing for drive members of the sanding pad, hollow and connected to the cavity of the protective housing.
  • the handle forms a discharge pipe for the grinding dust, attached to the free end of the suction hose, which extends away from the handle of the hand grinder.
  • a sanding pad for a dust extractor equipped sanding machine discloses the DE 89 02 423 U1 in which the disk body for Schleifstaubabsaugung with eight distributed on an inner circular line around the center, transverse to the disk body plane openings and eight formed on an outer circular line around the center formed in the free surface of the disk body recesses formed over approximately radially extending channels with the periphery of the disk body and are connected to the perforations, is equipped, and to which a disc of abrasive cloth abrasive material can be attached, which has congruent to the openings on one of the circular lines holes, each distributed on the inner circular line arranged openings at the bottom of a second recess, which extends from the inner circular line to beyond a middle, third circular line out. This should be used discs of abrasive cloth any hole pattern.
  • the invention has for its object to provide a system of the type mentioned, which allows a quick and easy installation of the grinding wheel, without the risk of incorrect installation is given.
  • the invention is based on the idea that overlap areas between suction openings of the sanding disk and breakthroughs of the grinding wheel provide a suction effect.
  • the grinding wheel does not have to be fixed in an exact angular position.
  • the grinding wheel can be practical be mounted or attached in any angular position.
  • the suction holes created by the overlap provide the necessary suction effect, so that sanding dust is always sucked in.
  • An operator of the grinding machine does not have to worry about the position of the grinding wheel.
  • the inventive vote of both parts can always be done a good dust extraction.
  • one or more, in particular two concentric ring arrangements of suction openings and openings are present.
  • the suction openings are practically on hole circles.
  • a bolt circle of the sanding pad coincides with a pitch circle of the sanding disk.
  • the number of openings is equal to the number of suction openings. For each breakthrough, there is a corresponding suction opening, so that when all suction openings or openings are the same size, there is a simple overlap image. This effect is enhanced when the geometric shape and size of the apertures is equal to the geometric shape and size of the suction openings.
  • the apertures and the suction openings are elongate, for example elliptical.
  • Such a grinding wheel is on the one hand easy to manufacture, on the other hand it is ensured that a minimum size of a suction hole, which results from the overlap, is maintained. This ensures that a suction motor of the grinding machine is not overloaded.
  • the openings and the suction openings are arranged at 90 ° to each other angularly offset.
  • suction openings e.g. 50 - 70 suction openings.
  • the area of a suction opening is e.g. 0.3%, ie at most 0.5% of the total area of the grinding wheel. Due to the large number of suction openings a uniform suction is achieved.
  • Fig. 1 shows a plan view of a sanding pad 1 of a grinding system or a grinding machine, which is designed in particular as a hand grinder, but not shown in detail.
  • the sanding pad 1 is provided with suction openings 2 for sucking in sanding dust.
  • the suction openings are divided into two concentric ring arrangements or hole circles 3 and 4.
  • all suction ports 2 have the same size and have the same geometric shape. All suction openings 2 are elongate or elliptical here.
  • the inner circle of holes 3 has twenty openings, while the outer circle of holes has thirty four suction openings 2.
  • the suction openings are within a concentric ring 3 or 4 in each case far enough apart that this distance corresponds approximately to the length of the suction openings. An approximately equal distance can be assumed if the length deviates by a maximum of 25%.
  • the suction openings are also relatively small. For example, the area of a breakthrough is 1/300 of the surface of the sanding pad surface.
  • Fig. 1 shows further dimensions.
  • the diameter D of the center hole D is preferably 18 mm
  • the diameter of the inner hole circle 3 is preferably 65 mm
  • the diameter of the outer hole circle 4 in particular 108 mm
  • the diameter of the grinding plate preferably 150 mm.
  • Fig. 2 illustrates the outer hole circle 4.
  • the angle ⁇ 1 between the suction openings is preferably 8 ° - 14 °, for example, 10.588 °.
  • This angle ⁇ 1 is smaller than the angle ⁇ 2 of the inner suction openings, which in Fig. 3 are shown separately.
  • the angle ⁇ 2 is in particular 15 ° -20 °, for example 18 °.
  • Fig. 4 the length L and width B of the elliptical suction openings is indicated.
  • the suction openings are inclined by 45 °, wherein the inclination direction of the inner suction openings is also rotated by 45 °, but in the opposite direction, so that the inner and outer suction openings are rotated by 90 ° to each other.
  • a grinding wheel 5 with breakthroughs 6 can be placed, as Fig. 5 shows. Front in the FIG. 5 the grinding wheel 5 can be seen, while behind the grinding wheel is arranged.
  • the grinding wheel 5 has a center hole 10 for fixing and is preferably made of abrasive paper. It can be fastened with Velcro, for example.
  • the apertures 6 of the grinding wheel 5 are so designed to the suction openings 3 of the grinding disc 1 that regardless of a rotational position when placing the grinding wheel 5 is always an overlap of the suction openings 3 with the apertures 6 is present, so that rotational position independent holes 7 are formed by the the sanding dust can be sucked off.
  • the holes 7 serve as suction holes.
  • a suction hole is practically formed by the intersection of both openings (opening 6 and suction 2). The size of the effective suction opening 2 is thus reduced to the size of the suction hole or hole 7.
  • Sanding pad 1 and grinding wheel 5 have approximately the same hole structure, the direction of the suction openings 2 and apertures 6 runs opposite, as Fig. 5 shows.
  • the openings 6 are elliptical.
  • the number of openings 6 is equal to the number of suction openings 2. Their size, shape also agrees with that of the suction opening.
  • the breakthroughs and the suction holes are how Fig. 5 shows, mutually angularly offset by 90 ° in the opposite direction.
  • the hole spacing of holes in a ring arrangement or a pitch circle is chosen so that the overlapping of the grinding wheel on the sanding disc always results in the greatest possible overlap. As a result, regardless of the arrangement of the grinding wheel 5 on the sanding pad 1 is given a good suction.
  • Fig. 6-8 show variants of the hole arrangements, wherein it can be seen that the direction of the ellipses of both the grinding wheel 5 and the grinding plate may be different, but always a suction opening 2 is arranged at 90 ° angularly offset to its opening 6.
  • the invention thus provides an advantage by a much simpler handling for the user with a simultaneously ensured good dust extraction.
  • the holes can also have, for example, oblong rectangular shapes, another oval shape or other arrangements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Polarising Elements (AREA)
  • Disintegrating Or Milling (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The grinder has a rotating plate (1) to hold a grinding disk, with suction openings (2) to extract dust aligned with openings in the grinding disk. The suction openings are arranged in concentric circles (3,4).

Description

Die Erfindung betrifft ein Schleifsystem nach dem Oberbegriff des Anspruches 1.The invention relates to a grinding system according to the preamble of claim 1.

Ein Schleifsystem mit den Merkmalen des Oberbegriffes des Anspruches 1 ist durch die US 2003/032383 A1 bekannt. Diese offenbart einen universellen Schleifartikel, der geeignet ist, auf der Montagefläche einer Schleifmaschine montiert zu werden, die über mehrere Staubabzugslöcher verfügt, die eine offene Fläche bilden, wobei der Schleifartikel über mehrere einzelne Öffnungen in Form von länglichen, gekrümmten Schlitzen verfügt, die derart bemessen und angeordnet sind, dass sie unabhängig von der Winkelstellung des Schleifartikels, wenn der Schleifartikel mit der Montagefläche passgenau ausgerichtet ist, den größten Teil der offenen Fläche der Staubabzugslöcher freihalten, wobei die Öffnungen symmetrisch um einen Mittelpunkt des Schleifartikels angeordnet sind. Eine winkelversetzte Anordnung der Öffnungen ist nicht vorgesehen.A grinding system with the features of the preamble of claim 1 is characterized by the US 2003/032383 A1 known. This discloses a universal abrasive article capable of being mounted on the mounting surface of a sanding machine having a plurality of dust extraction holes forming an open surface, the abrasive article having a plurality of discrete apertures in the form of elongated, curved slots sized so and arranged to keep most of the open area of the dust extraction holes clear, regardless of the angular position of the abrasive article when the abrasive article is properly aligned with the mounting surface, the openings being symmetrically disposed about a center of the abrasive article. An angular offset arrangement of the openings is not provided.

Die US-A-4 616 449 offenbart eine Absaugplatte für eine Schleifmaschine, die einen Stützblock aufweist und die über Mittel zur Beabstandung der Absaugplatte über der Oberseite des Stützblockes verfügt, sowie einen an die Peripherie der Abstützplatte gebundenen Rand aufweist, der eine relativ enge, periphere Öffnung zwischen der Innenfläche des Randes und der gegenüberliegenden Oberfläche des Stützblockes begrenzt, wobei die untere, periphere Kante des Randes mit der peripheren Kante des Stützblockes abschließt, wobei die Beabstandungsmittel Fußorgane an der Unterseite der Abstützplatte umfassen, wobei dieser Rand aus- und abwärts der Platte gerichtet ist, um die enge periphere Öffnung zwischen dem Rand und der Kante des Stützblockes zu definieren. Mindestens eine Öffnung ist in der Oberseite der Platte vorgesehen, um eine Verbindung zwischen der peripheren Öffnung und einer Unterdruckquelle der Schleifmaschine herzustellen. Mehrere Vorsprünge auf der Innenfläche des Randes dienen zur Abstandshaltung zwischen dem Rand und der gegenüberliegenden Oberfläche des Stützblockes. Die Absaugplatte und der Absaugblock sind kreisförmig angeordnet, wobei die Bodenfläche des Stützblockes mit mindestens einem kreisförmigen, konzentrische Öffnungen aufweisenden Kanal versehen ist. Die Öffnungen im Kanal erstrecken sich von diesem durch den Stützblock, um eine Verbindung zwischen dem konzentrischen Kanal und der Öffnung in der Oberseite der Abstützplatte herzustellen.The US-A-4,616,449 discloses a suction plate for a grinding machine having a support block and having means for spacing the suction plate over the top of the support block, and having an edge bonded to the periphery of the support plate having a relatively narrow peripheral opening between the inner surface of the edge and the peripheral surface of the support block bounded with the lower peripheral edge of the edge terminating with the peripheral edge of the support block, the spacing means comprising foot members on the underside of the support plate, said edge directed up and down the plate, around the narrow peripheral edge Defining opening between the edge and the edge of the support block. At least one opening is provided in the top of the plate to establish communication between the peripheral port and a vacuum source of the grinding machine. Several protrusions on the inner surface of the edge are used for spacing between the edge and the opposite surface of the support block. The suction plate and the suction block are arranged in a circle, wherein the bottom surface of the support block is provided with at least one circular, concentric openings having channel. The openings in the channel extend therefrom through the support block to establish communication between the concentric channel and the opening in the top of the support plate.

In der Druckschrift EP 0 557 773 A1 ist ein Schleifteller für Schleifmaschinen beschrieben, die eine Stützplatte mit mehreren Durchbrechungen bzw. Öffnungen von kreisförmigem Querschnitt aufweist. Über diese Durchbrechungen erfolgt der Luftstrom mit Schleifmitteistaub, d. h. durch diese Durchbrechungen kann der beim Schleifen entstehende Schleifstaub oder weitere feine Verunreinigungen, die beim Schleifen anfallen und zusammen mit dem Schleifstaub abtransportiert werden, unter Einsatz einer in oder an der Schleifmaschine angeordneten Absaugglocke abgesaugt werden.In the publication EP 0 557 773 A1 a sanding pad for grinding machines is described, which has a support plate with a plurality of openings or openings of circular cross-section. About these breakthroughs the air flow with Schleifmitteistaub, ie through these openings, the resulting during grinding sanding dust or other fine impurities that are incurred during grinding and are removed together with the sanding dust are sucked out using a arranged in or on the grinder suction bell.

Die EP 1 074 347 A2 beschreibt eine Schleifscheibe für die Verwendung in einer Schleifvorrichtung mit einer Antriebseinrichtung zur Staubabfuhr, wobei eine Anzahl von Staubabfuhrlöchem in einem Hauptkörper angeordnet sind.The EP 1 074 347 A2 describes a grinding wheel for use in a grinding apparatus having a dust removing drive, wherein a number of dust discharge holes are arranged in a main body.

Die Staubabfuhrlöcher sind in Abständen in dem Hauptkörper angeordnet, um das Abführen des beim Schleifvorgang erzeugten Staubes durch die im Zusammenwirken mit den Staubabfuhrlöchern anzutreiben. Die im Hauptkörper vorgesehenen Staubabführlöcher weisen keine speziell geformten Randbereiche auf, so dass auch keine aerodynamisch günstige Ausbildung der Schleifstaubabsaugdurchbrechungen erhalten wird, um den Luftfluss mit dem Schleifstaub optimieren zu können.The dust discharge holes are arranged at intervals in the main body to drive the discharge of the dust generated during the grinding operation by the in cooperation with the dust discharge holes. The provided in the main body Staubabführlöcher have no specially shaped edge areas, so that no aerodynamically favorable design of Schleifstaubabsaugdurchbrechungen is obtained in order to optimize the air flow with the grinding dust can.

Aus der DE 201 05 199 U1 ist ein tellerartiges Schleifwerkzeug bekannt, das einen Tragkörper mit mehreren Durchlassöffnungen und mit mehreren Schleifsegmenten aufweist. Hier sind Durchlassöffnungen für den Schleifstaub vorgesehen, die sehr groß bemessen sind, so dass der Schleifstaub ohne große Rückstände abgesogen werden kann. Die Randbereiche der Durchlassöffnungen weisen Randbereiche auf, die scharfkantig, jedoch nicht angeschliffen oder abgeschrägt sind, so dass keine aerodynamisch günstige Ausbildung der Schleifabsaugdurchbrechungen geschaffen werden.From the DE 201 05 199 U1 is a plate-like grinding tool is known, which has a support body with a plurality of passage openings and with a plurality of abrasive segments. Here are openings for the grinding dust provided, which are very large, so that the sanding dust can be sucked off without large residues. The edge regions of the passage openings have edge regions which are sharp-edged, but not ground or chamfered, so that no aerodynamically favorable design of Schleifabsaugdurchbrechungen be created.

In der Druckschrift EP 0 781 629 A1 weist der Schleifkörper eine Perforation auf, die annähernd gleichmäßig über die gesamte Fläche des Schleifkörpers verteilt oder zumindest partiell angeordnet ist und zumindest die das Schleifmittel aufweisende Schicht durchdringt, wobei der Abstand der einzelnen, die Perforation bildenden Durchbrechungen zueinander und gegenüber den Absaugeinrichtungen des Schleiftellers oder der Schleifplatte so gewählt ist, dass ein nahezu staubloser Transport des Schleifstaubs bewirkt sein soll.In the publication EP 0 781 629 A1 the abrasive body has a perforation which is distributed approximately evenly over the entire surface of the abrasive body or at least partially arranged and penetrates at least the abrasive layer having, wherein the distance of the individual perforations forming openings to each other and to the suction of the sanding pad or the Grinding plate is chosen so that a virtually dust-free transport of the grinding dust should be effected.

Die Schleifscheibe gemäß der Druckschrift DE 21 45 714 A1 weist auf ihrer gesamten Oberfläche eine Perforierung bildende Löcher auf, die regelmäßig über die gesamte Oberfläche verteilt sind und die mit im Inneren des Tellers annähernd radial verlaufenden Kanälen in Verbindung stehen und deren anderes Ende nach außen mündet.The grinding wheel according to the publication DE 21 45 714 A1 has on its entire surface a perforation forming holes which are regularly distributed over the entire surface and which communicate with the inside of the plate approximately radially extending channels and the other end opens to the outside.

Durch die DE 44 00 550 A1 ist ein Schleifschuh für eine mit Staubabsaugung ausgerüstete Arbeitsmaschine bekannt, bei dem die Absaugdurchbrüche in dem Scheibenkörper einendseitig Mündungsbereiche aufweisen, deren Öffnungen verbreitert sind, so dass auch bei exzentrisch aufgelegten Schleiftellern ein Staubfluss gewährleistet sein soll.By the DE 44 00 550 A1 is a sanding pad for a machine equipped with dust extraction work, in which the Absaugdurchbrüche in the disk body end-side mouth areas have, the openings are widened, so that even with eccentrically placed sanding pads dust flow should be guaranteed.

In der Druckschrift DE 40 32 069 A1 ist der Handgriff am zugleich als Absauggehäuse dienenden Schutzgehäuse für Antriebsorgane des Schleiftellers angeordnet, hohl ausgebildet sowie mit dem Hohlraum des Schutzgehäuses verbunden. Der Handgriff bildet ein Abführrohr für den Schleifstaub, an dessen freien Ende der Absaugschlauch befestigt ist, der sich vom Handgriff der Handschleifmaschine weg erstreckt.In the publication DE 40 32 069 A1 the handle is arranged at the same time serving as a suction housing protective housing for drive members of the sanding pad, hollow and connected to the cavity of the protective housing. The handle forms a discharge pipe for the grinding dust, attached to the free end of the suction hose, which extends away from the handle of the hand grinder.

Einen Schleifteller für eine mit Staubabsaugung ausgerüstete Schleifmaschine offenbart die DE 89 02 423 U1 , bei dem der Scheibenkörper zur Schleifstaubabsaugung mit acht auf einer inneren Kreislinie um das Zentrum verteilten, quer zur Scheibenkörperebene verlaufenden Durchbrechungen und mit acht auf einer äußeren Kreislinie um das Zentrum verteilten in die freie Oberfläche des Scheibenkörpers eingeformten Vertiefungen, die über etwa radial verlaufende Kanäle mit der Peripherie des Scheibenkörpers und mit den Durchbrechungen verbunden sind, ausgerüstet ist, und an den eine Scheibe aus Schleifleinen Schleifmaterial ansetzbar ist, die zu den Durchbrechungen auf einer der Kreislinien kongruente Löcher hat, wobei jede der auf der inneren Kreislinie verteilt angeordneten Durchbrechungen am Boden einer zweiten Vertiefung ausmündet, die sich von der inneren Kreislinie bis über eine mittlere, dritte Kreislinie hinaus erstreckt. Dadurch sollen Scheiben aus Schleifleinen beliebigem Lochbild verwendet werden.A sanding pad for a dust extractor equipped sanding machine discloses the DE 89 02 423 U1 in which the disk body for Schleifstaubabsaugung with eight distributed on an inner circular line around the center, transverse to the disk body plane openings and eight formed on an outer circular line around the center formed in the free surface of the disk body recesses formed over approximately radially extending channels with the periphery of the disk body and are connected to the perforations, is equipped, and to which a disc of abrasive cloth abrasive material can be attached, which has congruent to the openings on one of the circular lines holes, each distributed on the inner circular line arranged openings at the bottom of a second recess, which extends from the inner circular line to beyond a middle, third circular line out. This should be used discs of abrasive cloth any hole pattern.

Der Erfindung liegt die Aufgabe zugrunde, ein System der genannten Art zu schaffen, das eine schnelle und einfache Montage der Schleifscheibe erlaubt, und zwar ohne dass die Gefahr einer falschen Montage gegeben ist.The invention has for its object to provide a system of the type mentioned, which allows a quick and easy installation of the grinding wheel, without the risk of incorrect installation is given.

Diese Aufgabe wird durch ein System mit den kennzeichnenden Merkmalen des Anspruches 1 in Verbindung mit seinen Oberbegriffsmerkmalen gelöst.This object is achieved by a system having the characterizing features of claim 1 in conjunction with its preamble features.

Die Erfindung beruht auf den Gedanken, dass Überlappungsbereiche zwischen Saugöffnungen des Schleiftellers und Durchbrüchen der Schleifscheibe für eine Saugwirkung sorgen. Dadurch muss die Schleifscheibe nicht in exakter Winkellage befestigt sein. Die Schleifscheibe kann praktisch in einer beliebigen Winkellage montiert bzw. befestigt werden. Die durch die Überlappung entstehenden Sauglöcher sorgen für die erforderliche Saugwirkung, so dass Schleifstaub stets angesaugt wird. Ein Bediener der Schleifmaschine muss sich also nicht um die Position der Schleifscheibe kümmern. Durch die erfindungsgemäße Abstimmung beider Teile kann immer eine gute Staubabsaugung erfolgen.The invention is based on the idea that overlap areas between suction openings of the sanding disk and breakthroughs of the grinding wheel provide a suction effect. As a result, the grinding wheel does not have to be fixed in an exact angular position. The grinding wheel can be practical be mounted or attached in any angular position. The suction holes created by the overlap provide the necessary suction effect, so that sanding dust is always sucked in. An operator of the grinding machine does not have to worry about the position of the grinding wheel. The inventive vote of both parts can always be done a good dust extraction.

In einer vorteilhaften Ausführungsform des erfindungsgemäßen Systems ist vorgesehen, dass ein oder mehrere, insbesondere zwei konzentrische Ringanordnungen von Saugöffnungen und Durchbrüchen vorhanden sind. Die Saugöffnungen liegen praktisch auf Lochkreisen. Ein Lochkreis des Schleiftellers stimmt mit einem Lochkreis der Schleifscheibe überein. Dadurch können einerseits in einfacher Weise überlappende Bereiche geschaffen werden und andererseits verbleibt außerhalb der Lochkreise genügend Schleiffläche, so dass die Schleifwirkung kaum beeinträchtigt wird. Auch wird die Lebensdauer einer Schleifscheibe durch diese Maßnahme erhöht.In an advantageous embodiment of the system according to the invention it is provided that one or more, in particular two concentric ring arrangements of suction openings and openings are present. The suction openings are practically on hole circles. A bolt circle of the sanding pad coincides with a pitch circle of the sanding disk. As a result, on the one hand, overlapping areas can be created in a simple manner and, on the other hand, sufficient grinding area remains outside the hole circles, so that the grinding effect is hardly impaired. Also, the life of a grinding wheel is increased by this measure.

Vorteilhaft ist es, wenn die Anzahl der Durchbrüche gleich der Anzahl der Saugöffnungen ist. Für jeden Durchbruch gibt es also eine entsprechende Saugöffnung, so dass wenn alle Saugöffnungen bzw. Durchbrüche gleich groß sind, sich ein einfaches Überlappungsbild ergibt. Verstärkt wird dieser Effekt wenn die geometrische Form und Größe der Durchbrüche gleich der geometrischen Form und Größe der Saugöffnungen ist.It is advantageous if the number of openings is equal to the number of suction openings. For each breakthrough, there is a corresponding suction opening, so that when all suction openings or openings are the same size, there is a simple overlap image. This effect is enhanced when the geometric shape and size of the apertures is equal to the geometric shape and size of the suction openings.

Um eine optimale Überlappungsstruktur zu erhalten, ist es besonders günstig, wenn die Durchbrüche und die Saugöffnungen länglich, z.B. ellipsenförmig ausgeführt sind. Eine solche Schleifscheibe ist einerseits einfach herstellbar, wobei andererseits sichergestellt wird, dass eine Mindestgröße eines Saugloches, der durch die Überlappung entsteht, eingehalten wird. Dies stellt sicher, dass ein Ansaugmotor der Schleifmaschine nicht überlastet wird.In order to obtain an optimum overlapping structure, it is particularly advantageous if the apertures and the suction openings are elongate, for example elliptical. Such a grinding wheel is on the one hand easy to manufacture, on the other hand it is ensured that a minimum size of a suction hole, which results from the overlap, is maintained. This ensures that a suction motor of the grinding machine is not overloaded.

In einer weiteren vorteilhaften Weiterbildung der Erfindung sind die Durchbrüche und die Saugöffnungen zueinander um 90° winkelversetzt angeordnet. Hierdurch ist es möglich, dass die Durchbrüche relativ klein ausgeführt sind, so dass eine große Schleiffläche vorhanden ist. Eine große Schleiffläche erhöht nämlich nicht nur die Schleifwirkung, sondern auch die Lebensdauer der Schleifscheibe. Optimal ist es hierbei, wenn die Durchbrüche innerhalb eines konzentrischen Ringes jeweils soweit voneinander beabstandet sind, dass dieser Abstand etwa der Länge der Saugöffnungen entspricht. Dieser Effekt ist auch gegeben, wenn ein Lochabstand einer Ringanordnung oder eines Lochkreises so gewählt ist, dass sich beim Übereinanderlegen der Schleifscheibe auf den Schleifteller immer eine möglichst große Überschneidung ergibt.In a further advantageous embodiment of the invention, the openings and the suction openings are arranged at 90 ° to each other angularly offset. This makes it possible that the openings are made relatively small, so that a large grinding surface is present. Namely, a large grinding surface not only increases the grinding action but also the life of the grinding wheel. It is optimal in this case if the openings within a concentric ring are each spaced so far apart that this distance corresponds approximately to the length of the suction openings. This effect is also given when a hole spacing of a ring assembly or a bolt circle is chosen so that when overlaying the grinding wheel on the sanding plate always the largest possible overlap results.

So ist es möglich, dass eine Vielzahl von kleinen Saugöffnungen benutzt werden, z.B. 50 - 70 Saugöffnungen. Die Fläche einer Saugöffnung beträgt z.B. 0,3 %, also höchstens 0,5 % der Gesamtfläche der Schleifscheibe. Durch die Vielzahl der Saugöffnungen wird ein gleichmäßiges Absaugen erreicht.Thus, it is possible to use a plurality of small suction openings, e.g. 50 - 70 suction openings. The area of a suction opening is e.g. 0.3%, ie at most 0.5% of the total area of the grinding wheel. Due to the large number of suction openings a uniform suction is achieved.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.

Ein Ausführungsbeispiel wird anhand der Zeichnungen näher erläutert, wobei weitere vorteilhafte Weiterbildungen der Erfindung und Vorteile derselben beschrieben sind.An embodiment will be explained in more detail with reference to the drawings, wherein further advantageous developments of the invention and advantages thereof are described.

Es zeigen:

Fig. 1
eine erste Darstellung eines Schleiftellers,
Fig. 2
eine zweite Darstellung einer Schleiftellers,
Fig. 3
eine dritte Darstellung einer Schleiftellers,
Fig. 4
eine vierte Darstellung einer Schleiftellers,
Fig. 5
eine erste Darstellung einer Schleifscheibe mit dahinter angeordneten Schleiftellern,
Fig. 6
eine zweite Darstellung einer Schleifscheibe mit dahinter angeordneten Schleiftellern,
Fig. 7
eine dritte Darstellung einer Schleifscheibe mit dahinter angeordneten Schleiftellern und
Fig. 8
eine vierte Darstellung einer Schleifscheibe mit dahinter angeordneten Schleiftellern.
Show it:
Fig. 1
a first representation of a sanding plate,
Fig. 2
a second representation of a sanding plate,
Fig. 3
a third representation of a sanding plate,
Fig. 4
a fourth illustration of a sanding plate,
Fig. 5
a first representation of a grinding wheel with behind arranged grinding plates,
Fig. 6
a second representation of a grinding wheel with behind arranged grinding plates,
Fig. 7
a third representation of a grinding wheel with behind arranged grinding plates and
Fig. 8
a fourth representation of a grinding wheel with behind arranged grinding plates.

In den Figuren sind gleiche Teile mit denselben Bezugszeichen versehen.In the figures, like parts are given the same reference numerals.

Fig. 1 zeigt eine Aufsicht auf einen Schleifteller 1 eines Schleifsystems bzw. einer Schleifmaschine, die insbesondere als Handschleifgerät ausgeführt ist, jedoch nicht näher dargestellt ist. Der Schleifteller 1 ist mit Saugöffnungen 2 zum Ansaugen von Schleifstaub versehen. Die Saugöffnungen sind in zwei konzentrische Ringanordnungen bzw. Lochkreisen 3 und 4 unterteilt. Fig. 1 shows a plan view of a sanding pad 1 of a grinding system or a grinding machine, which is designed in particular as a hand grinder, but not shown in detail. The sanding pad 1 is provided with suction openings 2 for sucking in sanding dust. The suction openings are divided into two concentric ring arrangements or hole circles 3 and 4.

Wie Fig. 1 veranschaulicht, sind alle Saugöffnungen 2 gleich groß haben und haben die gleiche geometrische Form. Alle Saugöffnungen 2 sind länglich bzw. hier ellipsenförmig ausgeführt. Die auf dem äußeren Lochkreis 4, also außen liegenden Saugöffnungen sind winkelversetzt, vorzugsweise um 90°, zu den inneren Saugöffnungen des Lochkreises 3 angeordnet. Der innere Lochkreis 3 hat zwanzig Durchbrüche, während der äußere Lochkreis vierunddreißig Saugöffnungen 2 hat. Die Saugöffnungen sind innerhalb eines konzentrischen Ringes 3 oder 4 jeweils soweit voneinander beabstandet, dass dieser Abstand etwa der Länge der Saugöffnungen entspricht. Ein etwa gleicher Abstand kann angenommen werden, wenn die Länge um maximal 25 % abweicht. Die Saugöffnungen sind außerdem relativ klein. So ist die Fläche eines Durchbruches z.B. 1/300 der Fläche der Schleiftellerfläche.As Fig. 1 illustrated, all suction ports 2 have the same size and have the same geometric shape. All suction openings 2 are elongate or elliptical here. The on the outer hole circle 4, so outside suction openings are angularly offset, preferably arranged at 90 ° to the inner suction openings of the bolt circle 3. The inner circle of holes 3 has twenty openings, while the outer circle of holes has thirty four suction openings 2. The suction openings are within a concentric ring 3 or 4 in each case far enough apart that this distance corresponds approximately to the length of the suction openings. An approximately equal distance can be assumed if the length deviates by a maximum of 25%. The suction openings are also relatively small. For example, the area of a breakthrough is 1/300 of the surface of the sanding pad surface.

Fig. 1 zeigt weitere Abmessungen. Hierbei ist der Durchmesser D des Zentrumsloches D vorzugsweise 18 mm, der Durchmesser des inneren Lochkreises 3 vorzugsweise 65 mm, der Durchmesser des äußeren Lochkreises 4 insbesondere 108 mm und der Durchmesser des Schleiftellers vorzugsweise 150 mm. Fig. 1 shows further dimensions. Here, the diameter D of the center hole D is preferably 18 mm, the diameter of the inner hole circle 3 is preferably 65 mm, the diameter of the outer hole circle 4 in particular 108 mm and the diameter of the grinding plate preferably 150 mm.

Fig. 2 veranschaulicht den äußeren Lochkreis 4. Der Winkel α1 zwischen den Saugöffnungen beträgt vorzugsweise 8° - 14°, z.B. 10,588°. Dieser Winkel α1 ist kleiner als der Winkel α2 der inneren Saugöffnungen, die in Fig. 3 gesondert dargestellt sind. Der Winkel α2 beträgt insbesondere 15° -20°, z.B. 18°. Fig. 2 illustrates the outer hole circle 4. The angle α 1 between the suction openings is preferably 8 ° - 14 °, for example, 10.588 °. This angle α 1 is smaller than the angle α 2 of the inner suction openings, which in Fig. 3 are shown separately. The angle α 2 is in particular 15 ° -20 °, for example 18 °.

In Fig. 4 ist die Länge L und Breite B der elliptischen Saugöffnungen angedeutet. Die Länge L ist insbesondere etwa doppelt so lang wie die Breite B; z.B. B = 5 mm, L = 10 mm. Weiterhin ist gezeigt, dass die Saugöffnungen um 45° geneigt sind, wobei die Neigungsrichtung der inneren Saugöffnungen ebenfalls um 45° gedreht ist, jedoch in entgegengesetzter Richtung, so dass die inneren und äußeren Saugöffnungen zueinander um 90° gedreht sind.In Fig. 4 the length L and width B of the elliptical suction openings is indicated. In particular, the length L is about twice as long as the width B; eg B = 5 mm, L = 10 mm. Furthermore, it is shown that the suction openings are inclined by 45 °, wherein the inclination direction of the inner suction openings is also rotated by 45 °, but in the opposite direction, so that the inner and outer suction openings are rotated by 90 ° to each other.

Auf den Schleifteller 1 ist eine Schleifscheibe 5 mit Durchbrüchen 6 aufsetzbar, wie Fig. 5 zeigt. Vorne in der Figur 5 ist die Schleifscheibe 5 zu sehen, während dahinter die Schleifscheibe angeordnet ist.On the sanding pad 1, a grinding wheel 5 with breakthroughs 6 can be placed, as Fig. 5 shows. Front in the FIG. 5 the grinding wheel 5 can be seen, while behind the grinding wheel is arranged.

Die Schleifscheibe 5 hat ein zentrisches Loch 10 zum Fixieren und besteht vorzugsweise aus Schleifpapier. Sie ist zum Beispiel mit Klettverschluss befestigbar. Erfindungsgemäß sind die Durchbrüche 6 der Schleifscheibe 5 derart zu den Saugöffnungen 3 des Schleiftellers 1 ausgeführt, dass unabhängig von einer Drehposition beim Aufsetzen der Schleifscheibe 5 immer eine Überlappung der Saugöffnungen 3 mit den Durchbrüchen 6 vorhanden ist, so dass drehpositionsunabhängig Löcher 7 entstehen, durch die der Schleifstaub abgesaugt werden kann. Die Löcher 7 dienen als Absauglöcher. Ein Absaugloch wird praktisch durch die Schnittmenge beider Öffnungen (Durchbruch 6 und Saugöffnung 2) gebildet. Die Größe der wirksamen Saugöffnung 2 reduziert sich also zu der Größe des Absaugloches bzw. Loches 7.The grinding wheel 5 has a center hole 10 for fixing and is preferably made of abrasive paper. It can be fastened with Velcro, for example. According to the apertures 6 of the grinding wheel 5 are so designed to the suction openings 3 of the grinding disc 1 that regardless of a rotational position when placing the grinding wheel 5 is always an overlap of the suction openings 3 with the apertures 6 is present, so that rotational position independent holes 7 are formed by the the sanding dust can be sucked off. The holes 7 serve as suction holes. A suction hole is practically formed by the intersection of both openings (opening 6 and suction 2). The size of the effective suction opening 2 is thus reduced to the size of the suction hole or hole 7.

Schleifteller 1 und Schleifscheibe 5 haben etwa gleiche Lochstruktur, wobei die Richtung der Saugöffnungen 2 und Durchbrüche 6 entgegengesetzt verläuft, wie Fig. 5 zeigt. So wie die Saugöffnungen 2 sind auch die Durchbrüche 6 ellipsenförmig. Die Anzahl der Durchbrüche 6 ist gleich der Anzahl der Saugöffnungen 2. Ihre Größe, Form stimmt ebenfalls mit der der Saugöffnung überein. Die Durchbrüche und die Saugöffnungen sind, wie Fig. 5 zeigt, zueinander in entgegengesetzter Richtung um 90° winkelversetzt angeordnet.Sanding pad 1 and grinding wheel 5 have approximately the same hole structure, the direction of the suction openings 2 and apertures 6 runs opposite, as Fig. 5 shows. As well as the suction openings 2, the openings 6 are elliptical. The number of openings 6 is equal to the number of suction openings 2. Their size, shape also agrees with that of the suction opening. The breakthroughs and the suction holes are how Fig. 5 shows, mutually angularly offset by 90 ° in the opposite direction.

Der Lochabstand von Löchern in einer Ringanordnung oder einem Lochkreis ist so gewählt, dass sich beim Übereinanderlegen der Schleifscheibe auf den Schleifteller immer eine möglichst große Überschneidung ergibt. Dadurch ist unabhängig von der Anordnung der Schleifscheibe 5 auf dem Schleifteller 1 eine gute Saugwirkung gegeben.The hole spacing of holes in a ring arrangement or a pitch circle is chosen so that the overlapping of the grinding wheel on the sanding disc always results in the greatest possible overlap. As a result, regardless of the arrangement of the grinding wheel 5 on the sanding pad 1 is given a good suction.

Die Fig. 6 - 8 zeigen Varianten der Lochanordnungen, wobei zu erkennen ist, dass die Richtung der Ellipsen sowohl der Schleifscheibe 5 als auch des Schleiftellers unterschiedlich sein kann, wobei aber immer ein Saugöffnung 2 um 90° winkelversetzt zu ihrem Durchbruch 6 angeordnet ist.The Fig. 6-8 show variants of the hole arrangements, wherein it can be seen that the direction of the ellipses of both the grinding wheel 5 and the grinding plate may be different, but always a suction opening 2 is arranged at 90 ° angularly offset to its opening 6.

Wichtig ist also, dass die Durchbrüche 6 in der Schleifscheibe 5, welche auf dem Schleifteller 1 aufgelegt wird, genau in entgegengesetzter Richtung schräg angeordnet sind wie im Schleifteller 1. Beim Auflegen der Schleifscheibe 5 braucht sich der Anwender lediglich an dem vorhandenen zentrischen Loch 10 (Zentrumsloch) zu orientieren.It is therefore important that the openings 6 in the grinding wheel 5, which is placed on the sanding pad 1, are arranged obliquely exactly in the opposite direction as in the sanding pad 1. When placing the grinding wheel 5, the user only needs at the existing central hole 10 (FIG. Center hole) to orient.

Durch die Erfindung ergibt sich somit ein Vorteil durch eine deutlich einfachere Handhabung für den Anwender mit einer gleichzeitig sichergestellten guten Staubabsaugung.The invention thus provides an advantage by a much simpler handling for the user with a simultaneously ensured good dust extraction.

Die Erfindung ist nicht auf dieses Beispiel beschränkt, so können die Löcher auch z.B. längliche Rechteckformen, eine andere ovale Form oder andere Anordnungen aufweisen.The invention is not limited to this example, so the holes can also have, for example, oblong rectangular shapes, another oval shape or other arrangements.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Schleiftellersanding pad
22
Saugöffnungensuction ports
33
innerer Lochkreisinner bolt circle
44
äußerer Lochkreisouter bolt circle
55
Schleifscheibegrinding wheel
66
Durchbrüchebreakthroughs
77
Löcherholes
1010
zentrisches Lochcentric hole

Claims (13)

  1. A sanding system, comprising a grinding disk (1) of a grinding machine and an abrasive disk (5) attachable onto the grinding disk, wherein the grinding disk (1) is provided with suction openings (2) for sucking-in abrasive dust and the abrasive disk (5) has corresponding cut-outs (6), wherein the cut-outs of the abrasive disk are arranged with respect to the suction openings (2) of the grinding disk (1) in such a manner that independent from a rotational position when attaching the abrasive disk (5), an overlapping of the suction openings (2) with the cut-outs (6) exists so that independent from the rotational position, holes are formed through which the abrasive dust can be sucked-in, wherein the number of cut-outs (6) is equal to the number of the suction openings (2),
    characterized in
    that the cut-outs (6) and the suction openings (2) are formed elongated and are arranged with an angular offset in opposite direction with respect to each other.
  2. The sanding system according to claim 1,
    characterized in
    that one or more concentric ring arrangements of suction openings (2) and cut-outs (6) exist.
  3. The sanding system according to claim 2,
    characterized in
    that two concentric ring arrangements of suction openings (2) and cut-outs (6) exist.
  4. The sanding system according to any one of the preceding claims 1 to 3,
    characterized in
    that all suction openings (2) are the same size.
  5. The sanding system according to any one of the preceding claims 1 to 4,
    characterized in
    that the geometrical shape and size of the cut-outs (6) is equal to the geometrical shape and size of the suction openings (2).
  6. The sanding system according to any one of the preceding claims 1 to 5,
    characterized in
    that the cut-outs (6) and the suction openings (2) are formed approximately elliptical.
  7. The sanding system according to any one of the preceding claims 1 to 6,
    characterized in
    that the cut-outs (6) and the suction openings (2) are arranged offset to one another by an angle of 90°.
  8. The sanding system according to any one of the preceding claims 1 to 7,
    characterized in
    that the cut-outs (6) each have such a distance to one another within a concentric ring that this distance corresponds approximately to the length of the suction openings (2).
  9. The sanding system according to any one of the preceding claims 1 to 8,
    characterized in
    that a hole distance of a ring arrangement or a hole circle (3, 4) is selected in such a manner that when putting the abrasive disk (5) on top of the grinding disk (1), an overlapping as big as possible is always obtained.
  10. The sanding system according to any one of the preceding claims 1 to 9,
    characterized in
    that a plurality of small suction openings (2) exists, in particular a total of at least 40 suction openings, preferably 50 - 70 suction openings (2) exist, wherein the area of a suction opening (2) preferably is, at the most, 0.5 % of the total area of the abrasive disk.
  11. The sanding system according to any one of the preceding claims 1 to 10,
    characterized in
    that the abrasive disk (5) has a centric hole (10) for fixation.
  12. The sanding system according to any one of the preceding claims 1 to 11,
    characterized in
    that the abrasive disk (5) consists of sanding paper.
  13. The sanding system according to any one of the preceding claims 1 to 12,
    characterized in
    that the grinding machine is designed as a hand grinder.
EP07014468A 2007-04-02 2007-07-24 Sanding system Not-in-force EP1977858B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007004949U DE202007004949U1 (en) 2007-04-02 2007-04-02 Grinder with a rotating plate, to hold a grinding disk, has concentric circles of suction openings to extract dust

Publications (2)

Publication Number Publication Date
EP1977858A1 EP1977858A1 (en) 2008-10-08
EP1977858B1 true EP1977858B1 (en) 2009-06-03

Family

ID=38170583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014468A Not-in-force EP1977858B1 (en) 2007-04-02 2007-07-24 Sanding system

Country Status (3)

Country Link
EP (1) EP1977858B1 (en)
AT (1) ATE432792T1 (en)
DE (2) DE202007004949U1 (en)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP2797714B1 (en) 2011-12-31 2019-04-03 Saint-Gobain Abrasives, Inc. Abrasive article having a non-uniform distribution of openings
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander

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Publication number Priority date Publication date Assignee Title
DK178006B1 (en) * 2007-12-04 2015-03-02 Flex Trim As Grinding tools and apparatus for grinding a surface on plate-shaped workpieces
DE102010003616A1 (en) 2010-04-01 2011-10-06 Robert Bosch Gmbh Holding body for flexible abrasive and grinding system
DE202010012502U1 (en) 2010-09-13 2010-11-18 Robert Bosch Gmbh grinding wheel
EP2758210B1 (en) 2011-09-20 2016-05-18 Robert Bosch GmbH Retaining body for flexible grinding means, grinding system, and grinding tool
DE102017216175A1 (en) 2017-09-13 2019-03-14 Robert Bosch Gmbh abrasive article
GB2590707A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander

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US4616449A (en) 1984-08-31 1986-10-14 Miksa Marton Suction housing for vacuum sanding devices
DE8902423U1 (en) 1989-03-01 1989-06-29 Ihmels, Hartmut, 2905 Edewecht Sanding disc for a sander equipped with dust extraction
DE4032069A1 (en) 1990-03-23 1991-09-26 Hans Rainer Nied Angle grinder with dust extracting guard - has suction passage for escape of dust laden air from guard incorporated in handle
DE4205977A1 (en) 1992-02-27 1993-09-02 Bosch Gmbh Robert GRINDING PLATE FROM MULTIPLE MATERIAL LAYERS
DE4400550A1 (en) 1994-01-11 1995-07-13 Koltec Ag Grinding shoe for hand tool with vacuum removal of dust
KR100314287B1 (en) 1999-07-29 2001-11-23 김세광 Grinding wheel
US7108594B2 (en) * 2001-03-16 2006-09-19 Saint-Gobain Abrasives Technology Company Perforated sanding disc
DE20105199U1 (en) 2001-03-26 2002-08-08 DIEWE-Diamantwerkzeuge GmbH, 86510 Ried grinding tool
US6743086B2 (en) * 2001-08-10 2004-06-01 3M Innovative Properties Company Abrasive article with universal hole pattern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2797714B1 (en) 2011-12-31 2019-04-03 Saint-Gobain Abrasives, Inc. Abrasive article having a non-uniform distribution of openings
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Also Published As

Publication number Publication date
DE202007004949U1 (en) 2007-06-06
ATE432792T1 (en) 2009-06-15
DE502007000830D1 (en) 2009-07-16
EP1977858A1 (en) 2008-10-08

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