EP1117507B1 - Grinding tool - Google Patents

Grinding tool Download PDF

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Publication number
EP1117507B1
EP1117507B1 EP98944948A EP98944948A EP1117507B1 EP 1117507 B1 EP1117507 B1 EP 1117507B1 EP 98944948 A EP98944948 A EP 98944948A EP 98944948 A EP98944948 A EP 98944948A EP 1117507 B1 EP1117507 B1 EP 1117507B1
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EP
European Patent Office
Prior art keywords
grinding tool
grinding
tool according
slots
holding
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP98944948A
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German (de)
French (fr)
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EP1117507A1 (en
Inventor
Josef Vogel-Zaugg
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Botech AG
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Botech AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/06—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery the flaps or strips being individually attached
    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools

Definitions

  • the present invention relates to a grinding tool according to Preamble of claim 1.
  • Rotary grinding tool known in which the Abrasive in the form of an abrasive surface having abrasive cloths with on textile or cellulose Radial material or carrier material built on plastic protruding from a driven cylindrical body are arranged. The rotating tool is now about to machined surface, with the free ends of the Abrasives hit the surface one after the other and pulled over it.
  • the tool can either be used in an automatic machine or for manual processing be used.
  • This known construction is particularly suitable in shape of small tool diameters for machining hard ones Workpieces, for example made of metal.
  • From US-A-3 869 833 is a grinding tool with a drive shaft known, which is radial to the drive axis to the outside Has abrasive, which is arranged on a carrier tape are. Each abrasive is spaced from one another aligned parallel to the drive axis from the drive axis arranged handrail attached, the handrails spaced from each other on a circular path around the Drive axis are arranged in a basic clamping body.
  • the object of the present invention was now to Find grinding tool, which workpieces also made of soft Material, such as wood, and with an arched
  • this object is achieved by a grinding tool solved with the features of claim 1.
  • the grinding tool Due to the inventive design of the grinding tool is also with large dimensions of the tool, resp. with a large machining width, also curved contours created the following abrasive, which in particular also very well used for machining soft workpieces can be, such as wood.
  • the tool can be built relatively wide, i.e. have a wide working area, and thus even large workpieces with a curved surface in just a few steps to edit.
  • the surfaces of three-dimensional curved bodies optimally and quickly processed, even with soft material of the workpiece such as Wood.
  • the tool according to the invention also has a long service life and is relatively easy to maintain respectively. to chat.
  • the tool according to the invention is particularly suitable also for machining soft workpieces but also for workpieces with a hard surface and / or straight Use surface advantageously.
  • FIG 1 is a schematic view of an inventive Shown grinding tool.
  • the grinding tool points a cylindrical base clamping body 1 with drive shaft 2 leaf-shaped protruding on and on it Abrasives 3. Between the abrasives 3 are each Spacer elements 4 arranged, the abrasive 3 from each other distance and keep in shape.
  • the grinding tool is now driven by a motor Drive axis 2 set in rotation and then tangential introduced a workpiece to be machined.
  • you can the grinding tool can be set up stationary and that too machining workpiece, for example by means of a gripper arm, which can be numerically controlled, tangential to that rotating grinding tool can be introduced.
  • FIG. 2 is now a partial view of one of the leaf-shaped Abrasive 3 shown.
  • the abrasive 3 has here, for example, an essentially rectangular shape on and is essentially in the radial direction with respect to the drive axis 2 of the grinding tool extending slots 5.6.
  • the slots 5.6 have, for example a rectangular shape.
  • the against the free Slots 5 arranged at the end of the abrasive 3 are sufficient preferably up to the free edge of the abrasive 3, i.e. it are slits open to the outside.
  • This configuration of the abrasive 3 is on the one hand created a coherent abrasive 3, the free Edge through the slots 5, respectively. 6 in practical from each other independently deflectable flags is divided and thus one flexible grinding edge, which also forms strongly shaped three-dimensional contours of workpieces to be machined can follow.
  • the abrasives 3 are in operation when they hit the Workpiece to be machined against the direction of drive rotation deflected resp. pushed away. It has now been shown that through the arrangement of the slots 5,6 according to the invention the individual edge sections of each abrasive 3 advantageously nestle together and practically a homogeneous Form grinding plane. To be strong even when editing deformed workpieces to achieve homogeneous machining, the abrasives 3 are preferably one after the other arranged in the basic clamping body 1 that in successive Abrasives 3, the slots 5, respectively. 6 not immediately are arranged one behind the other, but laterally around aligned at least the width of the slots or larger are.
  • the abrasives 3 have a conventional structure from one leaf-shaped carrier material on one side or is provided on both sides with an abrasive grinding element, such as for example sand or corunt grains.
  • the carrier material can consist of cellulosic or artificial material.
  • the abrasives 3 are via holding rods 7 with the grinding tool resp. the basic clamping body 1 of Connected grinding tool.
  • Figure 3 is the partial view shown on a part of the base clamping body 1, namely the holding disc 8 for the holding rods 7.
  • the preferably cylindrical support rods 7 are individually around their longitudinal axes are rotatably mounted in bores of the holding disc 8.
  • a holding disc 8 is shown with a few holding rods 7, the opposite holding disc 8 'is only dashed indicated.
  • FIG 4 is the longitudinal section through the outer area of the base clamping body 1 with both holding washers 8 resp. 8 'and inserted holding rod 7 shown.
  • the support rods 7 are each on the outside the retaining washers 8 and 8 'attached rings 9 against kept axial displacement.
  • the rings 9 are, for example via a clamping connection 10, for example continuous clamping screws, braced against each other and can so that the washers 8 and 8 'connect with each other.
  • the handrails 7 for weight and strength reasons should be made narrow, it is preferably provided between the two washers 8 and 8 'if necessary, more Insert support plates 11.
  • This support discs 11 have instead of bores, as the retaining disks 8, 8 'have, semicircular or U-shaped radially open to the outside Slots through which the support rods 7 radially from the outside can be introduced.
  • This tether 12 thus serves first Line as a safety device and can be by means of clamping devices clamped against the drive axis 2 of the grinding tool 1 become.
  • the corner areas of the abrasive 3 can also be rounded be formed, as shown in Figure 5 in an alternative embodiment is shown.
  • the slots 5 can also for example rounded corners, lenticular shape or one slightly curved resp. have a curved longitudinal line.
  • FIG. 6 shows the section through an abrasive 3, which is attached to a support rod 7.
  • abrasive 3 For example can in the lower area of the abrasive 3 Eye 3 'be formed, which is pushed over the support rod 7 can be.
  • the abrasive 3 on the holding rods 7 is conceivable, such as. by passing through holding slots in the Handrails 7.
  • the spacer elements 4 are preferably in the same width as the abrasive 3 formed with less Height.
  • the spacer elements 4 can for example directly connected to the corresponding sides of the abrasive 3 be, for example, glued to it, or be connected to each other, the connecting element, for example a clamp or rivet, by a corresponding one Opening in the abrasive 3 is passed.
  • the spacer elements 4 only in the foot area of the Abrasive 3 with this resp. connected and are exposed radially to the outside on the surface of the abrasive 3 on.
  • the grinding tool according to the invention is particularly suitable for processing large three-dimensional shapes Workpieces in one step.
  • the configuration of the grinding tool can be advantageous be carried out in large dimensions, preferably with a diameter of more than 500 mm, which is the machining of such workpieces in a single operation. Due to the inventive design of the Abrasive 3 with the slots 5,6 is despite the large dimensions a flexible processing zone over the entire Width of the tool achieved what the machining of soft materials such as wood in particular.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)

Abstract

A grinding tool has radially projecting grinding elements separated by spacers. The grinding elements are provided with radially extending slots. Some of the slots are open-ended. Axially spaced slots alternate in different radial positions.

Description

Die vorliegende Erfindung betrifft ein Schleifwerkzeug gemäss Oberbegriff von Anspruch 1.The present invention relates to a grinding tool according to Preamble of claim 1.

Für die maschinelle, abrasive Bearbeitung von Oberflächen sind eine Vielzahl von Schleifwerkzeugen bekannt. So sind beispielsweise Rotations-Schleifwerkzeug bekannt, bei welchen das Schleifmittel in Form von eine abrasiv wirkende Oberfläche aufweisenden Schleiftüchern mit auf textilem oder zellulosem Material oder auf Kunststoff aufgebautem Trägermaterial radial von einem angetriebenen zylinderförmigen Grundkörper abstehend angeordnet sind. Das rotierende Werkzeug wird nun über die zu bearbeitende Oberfläche geführt, wobei die freien Enden der Schleifmittel dabei nacheinander auf die Oberfläche auftreffen und darüber gezogen werden. Das Werkzeug kann dabei entweder in einer automatischen Maschine eingesetzt sein oder für Handbearbeitung eingesetzt werden.For the mechanical, abrasive processing of surfaces a variety of grinding tools known. For example Rotary grinding tool known in which the Abrasive in the form of an abrasive surface having abrasive cloths with on textile or cellulose Radial material or carrier material built on plastic protruding from a driven cylindrical body are arranged. The rotating tool is now about to machined surface, with the free ends of the Abrasives hit the surface one after the other and pulled over it. The tool can either be used in an automatic machine or for manual processing be used.

Diese bekannte Konstruktion eignet sich insbesondere in Form von kleinen Werkzeugdurchmessern für die Bearbeitung von harten Werkstücken, beispielsweise aus Metall. Für die Bearbeitung von weichen Werkstücken, beispielsweise aus Holz, besteht die Gefahr, dass keine regelmässige Oberfläche erzielt werden kann, da die einzelnen Schleifmittel unterschiedlich stark in das Material eingreifen. Insbesondere tritt diese Problem nach der Einlaufphase des Werkzeuges noch vermehrt auf, nach welcher die Schleifmittel jeweils an den Enden durch den Gebrauch unterschiedliche Formen aufweisen. Für die Bearbeitung von grösseren Werkstücken muss dann das Schleifmittel gesteuert oder von Hand mehrfach über die gesamte Oberfläche verfahren werden, um diese gesamthaft zu bearbeiten, was einerseits zeitaufwendig ist und andererseits wiederum Probleme bei der Erzielung eines homogenen Schleifbildes bietet.This known construction is particularly suitable in shape of small tool diameters for machining hard ones Workpieces, for example made of metal. For editing of soft workpieces, for example made of wood the risk that a regular surface will not be achieved can, since the individual abrasives differ in strength intervene the material. This problem occurs in particular the running-in phase of the tool increases, after which the abrasives at each end due to use have different shapes. For editing Larger workpieces must then be controlled by the abrasive or move several times over the entire surface by hand to be able to process all of this, on the one hand is time consuming and on the other hand problems with the Achieving a homogeneous grinding pattern offers.

Wenn grössere Werkstücke bearbeitet werden sollen, sollte das Werkzeug in der Abmessung, insbesondere in der Bearbeitungsbreite, vergrössert werden, was aber bei herkömmlich bekannten Schleifwerkzeugen zu grossen Problemen bezüglich der Schleifwirkung führt. Herkömmliche:Schleifmittel würden über die Breite sehr steif und unbeweglich sein, und insbesondere die Bearbeitung von nicht ebenen, geschwungenen Oberflächen aus einem weichem Material praktisch verunmöglichen.If larger workpieces are to be processed, that should be the case Tool in size, especially in machining width, be enlarged, but what with conventionally known Grinding tools to big problems with the grinding effect leads. Conventional: Abrasives would over the Width to be very stiff and immovable, and especially that Machining of non-flat, curved surfaces practically impossible with a soft material.

Aus der US-A-3 869 833 ist ein Schleifwerkzeug mit Antriebsachse bekannt, welches radial zur Antriebsachse nach aussen stehende Schleifmittel aufweist, welche auf einem Trägerband angeordnet sind. Jedes Schleifmittel ist jeweils an einer im Abstand von der Antriebsachse parallel zur Antriebsachse ausgerichtet angeordneten Haltestange befestigt, wobei die Haltestangen untereinander beabstandet auf einer Kreisbahn um die Antriebsachse in einem Grundspannkörper angeordnet sind.From US-A-3 869 833 is a grinding tool with a drive shaft known, which is radial to the drive axis to the outside Has abrasive, which is arranged on a carrier tape are. Each abrasive is spaced from one another aligned parallel to the drive axis from the drive axis arranged handrail attached, the handrails spaced from each other on a circular path around the Drive axis are arranged in a basic clamping body.

Die Aufgabe der vorliegenden Erfindung lag nun darin, ein Schleifwerkzeug zu finden, welches Werkstücke auch aus weichem Material, wie beispielsweise Holz, und mit einer gewölbtenThe object of the present invention was now to Find grinding tool, which workpieces also made of soft Material, such as wood, and with an arched

Oberfläche zu bearbeiten in der Lage ist.Is able to edit surface.

Diese Aufgabe wird erfindungsgemäss durch eine Schleifwerkzeug mit den Merkmalen nach Anspruch 1 gelöst.According to the invention, this object is achieved by a grinding tool solved with the features of claim 1.

Weiter bevorzugte Ausführungsformen ergeben sich aus Merkmalen der abhängigen Ansprüchen 2 bis 11.Further preferred embodiments result from features of dependent claims 2 to 11.

Durch die erfindungsgemässe Ausgestaltung des Schleifwerkzeuges wird auch bei grossen Abmessungen des Werkzeuges, resp. bei einer grossen Bearbeitungsbreite, ein auch gewölbten Konturen folgendes Schleifmittel geschaffen, welches insbesondere auch sehr gut für die Bearbeitung von weichen Werkstücken eingesetzt werden kann, wie beispielsweise aus Holz. Vorteilhafterweise kann das Werkzeug verhältnismässig breit gebaut werden, d.h. eine breite Bearbeitungsfläche aufweisen, und damit auch grosse Werkstücke mit gewölbter Oberfläche in wenigen Arbeitsgängen bearbeiten. Insbesondere werden die Oberflächen von dreidimensional gewölbten Körpern optimal und schnell bearbeitet, selbst bei weichem Material des Werkstückes wie beispielsweise Holz.Due to the inventive design of the grinding tool is also with large dimensions of the tool, resp. with a large machining width, also curved contours created the following abrasive, which in particular also very well used for machining soft workpieces can be, such as wood. advantageously, the tool can be built relatively wide, i.e. have a wide working area, and thus even large workpieces with a curved surface in just a few steps to edit. In particular, the surfaces of three-dimensional curved bodies optimally and quickly processed, even with soft material of the workpiece such as Wood.

Das erfindungsgemässe Werkzeug weist überdies eine hohe Lebensdauer auf und lässt sich verhältnismässig einfach warten resp. unterhalten.The tool according to the invention also has a long service life and is relatively easy to maintain respectively. to chat.

Das erfindungsgemässe Werkzeug eignet sich zwar insbesondere auch für die Bearbeitung von weichen Werkstücken, lässt sich aber auch für Werkstücke mit harter Oberfläche und/oder gerader Oberfläche vorteilhaft einsetzen.The tool according to the invention is particularly suitable also for machining soft workpieces but also for workpieces with a hard surface and / or straight Use surface advantageously.

Ein Ausführungsbeispiel der vorliegenden Erfindung wird nachstehend anhand von Figuren noch näher erläutert. Es zeigen

  • Fig. 1 die schematische Ansicht eines erfindungsgemässen Schleifwerkzeuges;
  • Fig. 2 die Ausschnittsansicht eines Schleifwerkzeuges nach Figur 1 auf die Schleifmittel;
  • Fig. 3 die Ansicht des Grundspannkörpers mit Haltestäben des Schleifwerkzeuges nach Figur 1 in Teilansicht;
  • Fig. 4 den Längsschnitt durch ein Schleifwerkzeug in alternativer Ausführung im Bereich der Schleifmittel;
  • Fig. 5 die Ansicht eines alternativ ausgestalteten Schleifmittels; und
  • Fig. 6 den Schnitt durch ein Schleifmittel mit Haltestab und Abstandselementen.
    • An embodiment of the present invention is explained in more detail below with reference to figures. Show it
  • 1 shows the schematic view of an inventive grinding tool;
  • FIG. 2 shows the detail view of a grinding tool according to FIG. 1 on the grinding means;
  • 3 shows the partial view of the basic clamping body with holding rods of the grinding tool according to FIG. 1;
  • 4 shows the longitudinal section through an abrasive tool in an alternative embodiment in the area of the abrasive.
  • 5 shows the view of an alternatively configured abrasive; and
  • Fig. 6 shows the section through an abrasive with a holding rod and spacers.

    • In Figur 1 ist schematisch die Ansicht eines erfindungsgemässen Schleifwerkzeuges dargestellt. Das Schleifwerkzeug weist einen zylinderförmigen Grundspannkörper 1 mit Antriebsachse 2 auf und daran radial nach aussen abragende, blattförmige Schleifmittel 3. Zwischen den Schleifmitteln 3 sind jeweils Abstandselemente 4 angeordnet, welche die Schleifmittel 3 voneinander beabstanden und in Form halten.In Figure 1 is a schematic view of an inventive Shown grinding tool. The grinding tool points a cylindrical base clamping body 1 with drive shaft 2 leaf-shaped protruding on and on it Abrasives 3. Between the abrasives 3 are each Spacer elements 4 arranged, the abrasive 3 from each other distance and keep in shape.

    Das Schleifwerkzeug wird nun mittels eines Motores über die Antriebsachse 2 in Rotation versetzt und dann tangential an ein zu bearbeitendes Werkstück herangeführt. Alternativ kann das Schleifwerkzeug stationär eingerichtet werden und das zu bearbeitende Werkstück beispielsweise mittels eines Greifarmes, welcher numerisch gesteuert sein kann, tangential an das rotierende Schleifwerkzeug herangeführt werden.The grinding tool is now driven by a motor Drive axis 2 set in rotation and then tangential introduced a workpiece to be machined. Alternatively, you can the grinding tool can be set up stationary and that too machining workpiece, for example by means of a gripper arm, which can be numerically controlled, tangential to that rotating grinding tool can be introduced.

    In Figur 2 ist nun eine Teilansicht auf eines der blattförmigen Schleifmittel 3 dargestellt. Das Schleifmittel 3 weist hier beispielsweise eine im wesentlichen rechteckförmige Gestalt auf und besitzt sich im wesentlichen in radialer Richtung in Bezug auf die Antriebsachse 2 des Schleifwerkzeuges erstreckende Schlitze 5,6. Die Schlitze 5,6 weisen beispielsweise eine rechteckförmige Gestalt auf. Die gegen das freie Ende des Schleifmittels 3 hin angeordneten Schlitze 5 reichen vorzugsweise bis zum freien Rand des Schleifmittels 3, d.h. es sind nach aussen offene Schlitze. Die weiter nach Innen gegen die Drehachse 2 hin befindlichen Schlitze 6 sind derart angeordnet, dass ihre Oberkante 6' radial weiter entfernt von der Drehachse 2 angeordnet sind als die Unterkanten 5' der Schlitze 5, d.h benachbarte Schlizte 5,6 sind also zueinander überlappend versetzt angeordnet. In Figure 2 is now a partial view of one of the leaf-shaped Abrasive 3 shown. The abrasive 3 has here, for example, an essentially rectangular shape on and is essentially in the radial direction with respect to the drive axis 2 of the grinding tool extending slots 5.6. The slots 5.6 have, for example a rectangular shape. The against the free Slots 5 arranged at the end of the abrasive 3 are sufficient preferably up to the free edge of the abrasive 3, i.e. it are slits open to the outside. The further inside against the slots 6 towards the axis of rotation 2 are arranged in such a way that its upper edge 6 'radially further away from the Axis of rotation 2 are arranged as the lower edges 5 'of the slots 5, i.e. adjacent slides 5, 6 are therefore overlapping with one another staggered.

    Durch diese Ausgestaltung der Schleifmittel 3 wird einerseits ein zusammenhängendes Schleifmittel 3 geschaffen, dessen freie Kante durch die Schlitze 5 resp. 6 in voneinander praktisch unabhängig auslenkbare Fahnen aufgeteilt wird und damit eine flexible Schleifkante bildet, welche auch stark geformten, dreidimensionalen Konturen von zu bearbeitenden Werkstücken folgen kann. Damit wird vorteilhafterweise eine gute, homogene Schleifwirkung ohne übermässig starken Druck erzielt, wie er bei einem durchgehenden Schleifmittel auftreten würde, weshalb auch Werkstücke aus verhältnismässig weichem Material, wie beispielsweise Holz, bearbeitet werden können, ohne dass unregelmässige oder übermässiger Materialabtrag durch die Schleifmittel 3 verursacht würde.This configuration of the abrasive 3 is on the one hand created a coherent abrasive 3, the free Edge through the slots 5, respectively. 6 in practical from each other independently deflectable flags is divided and thus one flexible grinding edge, which also forms strongly shaped three-dimensional contours of workpieces to be machined can follow. This advantageously results in a good, homogeneous Grinding effect achieved without excessive pressure like he does would occur with a continuous abrasive, which is why even workpieces made of relatively soft material, such as For example, wood, can be processed without irregular or excessive material removal by the abrasives 3 would cause.

    Die Schleifmittel 3 werden im Betrieb beim Auftreffen auf das zu bearbeitende Werkstück entgegen der Antriebsdrehrichtung ausgelenkt resp. weggedrückt. Es hat sich nun gezeigt, dass durch die erfindungsgemässe Anordnung der Schlitze 5,6 sich die einzelnen Randabschnitte jedes Schleifmittels 3 vorteilhafterweise aneinanderschmiegen und praktisch eine homogene Schleifebene bilden. Um auch bei der Bearbeitung von stark verformten Werkstücken eine homogene Bearbeitung zu erzielen, werden die Schleifmittel 3 bevorzugterweise derart hintereinander im Grundspannkörper 1 angeordnet, dass bei aufeinanderfolgenden Schleifmitteln 3 die Schlitze 5 resp. 6 nicht unmittelbar hintereinander angeordnet sind, sondern seitlich um mindestens die Breite der Schlitze oder grösser versetzt ausgerichtet sind.The abrasives 3 are in operation when they hit the Workpiece to be machined against the direction of drive rotation deflected resp. pushed away. It has now been shown that through the arrangement of the slots 5,6 according to the invention the individual edge sections of each abrasive 3 advantageously nestle together and practically a homogeneous Form grinding plane. To be strong even when editing deformed workpieces to achieve homogeneous machining, the abrasives 3 are preferably one after the other arranged in the basic clamping body 1 that in successive Abrasives 3, the slots 5, respectively. 6 not immediately are arranged one behind the other, but laterally around aligned at least the width of the slots or larger are.

    Die Schleifmittel 3 weisen einen herkömmlichen Aufbau aus einem blattförmigem Trägermaterial auf, welches einseitig oder beidseitig mit einem abrasiven Schleiforgan versehen ist, wie beispielsweise Sand- oder Koruntkörnern. Das Trägermaterial kann dabei aus zellulosem oder künstlichen Material bestehen.The abrasives 3 have a conventional structure from one leaf-shaped carrier material on one side or is provided on both sides with an abrasive grinding element, such as for example sand or corunt grains. The carrier material can consist of cellulosic or artificial material.

    Die Schleifmittel 3 sind erfindungsgemäss über Haltestangen 7 mit dem Schleifwerkzeug resp. dem Grundspannkörper 1 des Schleifwerkzeuges verbunden. In Figur 3 ist nun die Teilansicht auf einen Teil des Grundspannkörpers 1 dargestellt, nämlich der Haltescheibe 8 für die Haltestangen 7. Die vorzugsweise zylinderförmigen Haltestangen 7 sind dabei einzeln um ihre Längsachsen drehbar in Bohrungen der Haltescheibe 8 gelagert. Der Uebersichtlichkeit halber sind in der Figur 3 nur eine Haltescheibe 8 mit wenigen Haltestangen 7 dargestellt, die gegenüberliegende Haltescheibe 8' ist lediglich gestrichelt angedeutet.According to the invention, the abrasives 3 are via holding rods 7 with the grinding tool resp. the basic clamping body 1 of Connected grinding tool. In Figure 3 is the partial view shown on a part of the base clamping body 1, namely the holding disc 8 for the holding rods 7. The preferably cylindrical support rods 7 are individually around their longitudinal axes are rotatably mounted in bores of the holding disc 8. For the sake of clarity are only in Figure 3 a holding disc 8 is shown with a few holding rods 7, the opposite holding disc 8 'is only dashed indicated.

    In Figur 4 ist nun detaillierter der Längsschnitt durch den äusseren Bereich des Grundspannkörpers 1 mit beiden Haltescheiben 8 resp. 8' und eingesetzter Haltestange 7 dargestellt. Die Haltestangen 7 werden durch jeweils auf der Aussenseite der Haltescheiben 8 resp. 8' angebrachte Ringe 9 gegen axiale Verschiebung gehalten. Die Ringe 9 werden beispielsweise über eine Spannverbindung 10, beispielsweise durchgehenden Spannschrauben, gegeneinander verspannt und können damit auch die Haltescheiben 8 und 8' miteinander verbinden.In Figure 4 is the longitudinal section through the outer area of the base clamping body 1 with both holding washers 8 resp. 8 'and inserted holding rod 7 shown. The support rods 7 are each on the outside the retaining washers 8 and 8 'attached rings 9 against kept axial displacement. The rings 9 are, for example via a clamping connection 10, for example continuous clamping screws, braced against each other and can so that the washers 8 and 8 'connect with each other.

    Da die Haltestangen 7 aus Gewichts- und Festigkeitsgründen schmal ausgeführt sein sollten, ist vorzugsweise vorgesehen, zwischen den beiden Haltescheiben 8 resp. 8' ggf. weitere Stützscheiben 11 einzusetzen. Dies Stützscheiben 11 haben anstelle von Bohrungen, wie dies die Haltescheiben 8, 8' aufweisen, halbkreis- oder U-förmige radial nach Aussen offene Schlitze, durch welche die Haltestangen 7 radial von Aussen eingeführt werden können. Vorzugsweise ist weiter vorgesehen, ein Halteseil 12 um die Peripherie der Stützscheibe 11 anzuordnen. Dieses dient dazu, zu verhindern, dass sich die Haltestangen 7 im Betrieb, gerade bei hohen Drehzahlen, unter der Belastung nach Aussen ausbiegen und im Extremfall aus den entsprechenden Bohrungen der Haltescheiben 8 resp. 8' herausgezogen werden können. Dieses Halteseil 12 dient damit in erster Linie als Sicherheitsmittel und kann mittels Spannvorrichtungen gegen die Antriebsachse 2 des Schleifwerkzeuges 1 hin verspannt werden.Since the handrails 7 for weight and strength reasons should be made narrow, it is preferably provided between the two washers 8 and 8 'if necessary, more Insert support plates 11. This support discs 11 have instead of bores, as the retaining disks 8, 8 'have, semicircular or U-shaped radially open to the outside Slots through which the support rods 7 radially from the outside can be introduced. It is preferably further provided a tether 12 to arrange the periphery of the support plate 11. This is to prevent the handrails from moving 7 in operation, especially at high speeds, under the Bend the load outwards and in extreme cases from the corresponding Holes of the washers 8 and. 8 'pulled out can be. This tether 12 thus serves first Line as a safety device and can be by means of clamping devices clamped against the drive axis 2 of the grinding tool 1 become.

    Die Eckbereiche der Schleifmittel 3 können auch abgerundet ausgebildet sein, wie dies in Figur 5 in alternativer Ausführung dargestellt ist. Ebenfalls können die Schlitze 5 auch beispielsweise gerundete Ecken, linsenförmige Gestalt oder eine leicht gebogene resp. geschwungene Längslinie aufweisen.The corner areas of the abrasive 3 can also be rounded be formed, as shown in Figure 5 in an alternative embodiment is shown. The slots 5 can also for example rounded corners, lenticular shape or one slightly curved resp. have a curved longitudinal line.

    In Figur 6 ist der Schnitt durch ein Schleifmittel 3 dargestellt, welches an einer Haltestange 7 befestigt ist. Beispielsweise kann im unteren Bereich des Schleifmittels 3 ein Auge 3' ausgebildet sein, welches über die Haltestange 7 geschoben werden kann. Selbstverständlich sind auch andere Befestigungsarten der Schleifmittel 3 an den Haltestangen 7 denkbar, wie z.B. durch Hindurchführen durch Halteschlitze in den Haltestangen 7.6 shows the section through an abrasive 3, which is attached to a support rod 7. For example can in the lower area of the abrasive 3 Eye 3 'be formed, which is pushed over the support rod 7 can be. Of course, other types of fastening are also possible the abrasive 3 on the holding rods 7 is conceivable, such as. by passing through holding slots in the Handrails 7.

    Beispielsweise beidseitig des Schleifmittels 3 sind zwei Abstandselemente 4 angeordnet, wie ebenfalls aus Figur 4 ersichtlich ist. Die Abstandselemente 4 sind vorzugsweise in derselben Breite wie die Schleifmittel 3 ausgebildet bei geringerer Höhe. Die Abstandselemente 4 können beispielsweise direkt mit den entsprechenden Seiten der Schleifmittel 3 verbunden sein, beispielsweise damit verklebt sein, oder aber miteinander verbunden sein, wobei das Verbindungselement, beispielsweise eine Klammer oder Niete, durch eine entsprechende Öffnung im Schleifmittel 3 hindurchgeführt ist. Vorzugsweise sind die Abstandselemente 4 lediglich im Fussbereich des Schleifmittels 3 mit diesem resp. miteinander verbunden und liegen radial gegen aussen frei an der Oberfläche des Schleifmittels 3 auf.For example, on both sides of the abrasive 3 there are two spacer elements 4 arranged, as can also be seen from Figure 4 is. The spacer elements 4 are preferably in the same width as the abrasive 3 formed with less Height. The spacer elements 4 can for example directly connected to the corresponding sides of the abrasive 3 be, for example, glued to it, or be connected to each other, the connecting element, for example a clamp or rivet, by a corresponding one Opening in the abrasive 3 is passed. Preferably are the spacer elements 4 only in the foot area of the Abrasive 3 with this resp. connected and are exposed radially to the outside on the surface of the abrasive 3 on.

    Das erfindungsgemässe Schleifwerkzeug eignet sich insbesondere für die Bearbeitung von grossen dreidimensional geformten Werkstücken in einem Arbeitsgang. Durch die erfindungsgemässe Ausgestaltung des Schleifwerkzeuges kann dieses vorteilhafterweise in grossen Dimensionen ausgeführt werden, vorzugsweise mit einem Durchmesser von mehr als 500 mm, was die Bearbeitung von derartigen Werkstücken in einem einzigen Arbeitsgang ermöglicht. Durch die erfindungsgemässe Ausgestaltung der Schleifmittel 3 mit den Schlitzen 5,6 wird trotz grosser Abmessungen eine flexible Bearbeitungszone über die gesamte Breite des Werkzeuges erzielt, was auch die Bearbeitung von weichen Materialien wie insbesondere Holz möglich macht.The grinding tool according to the invention is particularly suitable for processing large three-dimensional shapes Workpieces in one step. By the inventive The configuration of the grinding tool can be advantageous be carried out in large dimensions, preferably with a diameter of more than 500 mm, which is the machining of such workpieces in a single operation. Due to the inventive design of the Abrasive 3 with the slots 5,6 is despite the large dimensions a flexible processing zone over the entire Width of the tool achieved what the machining of soft materials such as wood in particular.

    Claims (11)

    1. Grinding tool having a driving axis (2) and grinding means (3), which are disposed radially relative to the driving axis in an outwardly projecting manner and comprise abrasive grinding elements disposed on a flexible base strip, wherein each grinding means (3) is fastened in each case to a holding bar (7), which is disposed at a distance from the driving axis (2) and aligned parallel to the driving axis (2), and wherein the holding bars (7) are arranged mutually spaced apart on a circular path around the driving axis (2) in a basic clamping body (1), characterized in that disposed in each case between adjacent grinding means (3) are spacing elements (4) extending at least over a sub-region of the grinding means and the grinding means (3) have slots (5, 6), which extend in each case substantially radially relative to the driving axis (2) and of which at least some are slots (5) open towards the free end of the grinding means (3), and wherein the slots (5, 6) are formed in each case at a spacing alongside one another alternately in at least two radially different positions relative to the driving axis.
    2. Grinding tool according to claim 1, characterized in that the slots (5, 6) are spaced at regular intervals and each have the same dimensions.
    3. Grinding tool according to one of claims 1 or 2, characterized in that the respective bottom (5') and/or top (6') end regions of adjacent slots (5, 6) of a grinding means (3) are disposed so as to overlap in radial direction.
    4. Grinding tool according to one of claims 1 to 3, characterized in that the radially overlapping slots (5, 6) of in each case directly successive grinding means (3) are arranged offset in axial direction at least by the width of the slots (5, 6).
    5. Grinding tool according to one of claims 1 to 4, characterized in that the holding bars (7) take the form of round rods and are disposed so as to be mounted rotatably about their longitudinal axis.
    6. Grinding tool according to one of claims 1 to 5, characterized in that the ends of the holding rods (7) are introduced into bores of holding disks (8), which form part of the basic clamping body (1).
    7. Grinding tool according to one of claims 1 to 6, characterized in that the basic clamping body (1) comprises at each side a holding disk (8, 8') and at least additionally between said holding disks (8, 8') comprises at least one supporting disk (11), which is disposed parallel thereto and extends radially at least as far as the holding bars (7) and preferably at least partially surrounds the latter.
    8. Grinding tool according to claim 7, characterized in that stretched around the circumference of the supporting disk (11) is a stay rope (12), which extends radially outside of the holding bars (7), being preferably disposed so as to lie against the outside of the latter.
    9. Grinding tool according to one of claims 1 to 8, characterized in that the spacing elements (4) take the form of elastic cushions, preferably made of plastics material or natural fibres.
    10. Grinding tool according to one of claims 1 to 9, characterized in that the spacing elements (4) are fastened in each case at one side or at both sides, preferably only at the foot region, to the grinding means (3).
    11. Grinding tool according to one of claims 1 to 10, characterized in that the diameter of the grinding tool is at least 500 mm.
    EP98944948A 1998-10-02 1998-10-02 Grinding tool Expired - Lifetime EP1117507B1 (en)

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    PCT/CH1998/000422 WO2000020171A1 (en) 1998-10-02 1998-10-02 Grinding tool

    Publications (2)

    Publication Number Publication Date
    EP1117507A1 EP1117507A1 (en) 2001-07-25
    EP1117507B1 true EP1117507B1 (en) 2003-01-02

    Family

    ID=4551357

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98944948A Expired - Lifetime EP1117507B1 (en) 1998-10-02 1998-10-02 Grinding tool

    Country Status (7)

    Country Link
    US (1) US6491576B1 (en)
    EP (1) EP1117507B1 (en)
    AT (1) ATE230328T1 (en)
    AU (1) AU9249898A (en)
    DE (1) DE59806834D1 (en)
    DK (1) DK1117507T3 (en)
    WO (1) WO2000020171A1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2548766A1 (en) 2011-07-22 2013-01-23 Solvay Sa Unloading device, process and unloaded powder
    FR3006221B1 (en) * 2013-05-31 2015-07-03 Snecma GRINDING TOOL
    CA2959779C (en) 2016-03-04 2019-06-11 The Libman Company Scissor-style toilet brush

    Family Cites Families (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2259475A (en) * 1940-04-10 1941-10-21 Koppers Co Inc Apparatus for reconditioning engine cylinders
    US3869833A (en) 1974-03-21 1975-03-11 James A Belanger Rotary finishing wheel
    JPS5789566A (en) * 1980-11-17 1982-06-03 Sankyo Rikagaku Kk Abrasive blade wheel
    DE3145151C2 (en) 1981-11-13 1986-02-06 Bayerische Motoren Werke AG, 8000 München Drivable roller for grinding or polishing the surface of a vehicle body or the like
    US4882880A (en) * 1988-05-17 1989-11-28 Schaffner Manufacturing Company, Inc. Ganging of buffing wheels
    US5355639A (en) * 1990-07-04 1994-10-18 Commissariat A L'energie Atomique Device for machining of contours made of a soft material and automatic machining method using such a device
    US5157874A (en) * 1990-08-20 1992-10-27 Peng Shih Jen Rotary multi-brushes
    JPH07314337A (en) * 1994-05-25 1995-12-05 Taku Nakasaki Manufacture of rotating member for grinding
    JP2729924B2 (en) * 1994-07-29 1998-03-18 株式会社スリーエフ技研 Abrasive wheel with vent for exhaust heat
    DE29617206U1 (en) * 1996-10-02 1996-12-05 Osborn International GmbH, 35099 Burgwald Rotary brush for surface treatment of workpieces

    Also Published As

    Publication number Publication date
    WO2000020171A1 (en) 2000-04-13
    AU9249898A (en) 2000-04-26
    US6491576B1 (en) 2002-12-10
    EP1117507A1 (en) 2001-07-25
    ATE230328T1 (en) 2003-01-15
    DE59806834D1 (en) 2003-02-06
    DK1117507T3 (en) 2003-04-22

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