EP2750831B1 - Grinding or cutting tool for a machine tool with a rotary drive - Google Patents

Grinding or cutting tool for a machine tool with a rotary drive Download PDF

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Publication number
EP2750831B1
EP2750831B1 EP12735550.1A EP12735550A EP2750831B1 EP 2750831 B1 EP2750831 B1 EP 2750831B1 EP 12735550 A EP12735550 A EP 12735550A EP 2750831 B1 EP2750831 B1 EP 2750831B1
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EP
European Patent Office
Prior art keywords
grinding
main material
material removing
cutting tool
removing body
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EP12735550.1A
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German (de)
French (fr)
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EP2750831A1 (en
Inventor
Milan Bozic
Daniel Grolimund
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B24B27/08—Grinders for cutting-off being portable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D99/00—Subject matter not provided for in other groups of this subclass

Definitions

  • the invention relates to a grinding or cutting tool for a machine tool with rotary drive according to the preamble of claim 1.
  • the grinding or cutting tool has a Abtragungsground phenomenon with U-shaped cross section, whose end faces form cutting edges.
  • the Abtragungsground phenomenon is made in one piece with a mounting portion over which the tool is releasably secured to the tool shaft.
  • the attachment portion extends transversely to the U-shaped Abtragsground phenomenon and is integrally formed with a leg of the body.
  • a grinding or cutting tool which has a Abtragungsground phenomenon with flat bearing side, which at the workpiece machining rests on the workpiece.
  • the ablation body has a lateral processing edge.
  • the Abtragungsground phenomenon has a C-shaped cross section, wherein the convex outer side forms the support side.
  • the end portions of the C-shaped cross-section are connected to each other via a mounting plate which is fastened via rivets on Abtragungsground phenomena.
  • the mounting plate has a central recess for attachment to the tool shaft.
  • the invention is based on the object with simple constructive measures a grinding or cutting tool for a machine tool with rotary drive in such a way that the forces acting on the machine tool forces are reduced and the service life is increased.
  • the grinding or cutting tool according to the invention can be used in machine tools, in particular in handheld power tools with rotary drive, for example for the production of grooves. Both drives with only one direction of rotation and rotary oscillating drives with alternating direction of rotation are considered.
  • the drive in the machine tool is preferably via an electric drive motor.
  • the grinding or cutting tool has a Abtragungsgroundianu and a mounting portion.
  • the Abtragungsgroundianu has a processing edge or a processing surface and is used for workpiece machining, whereas over the mounting portion a releasable connection with the tool shaft of the machine tool is made.
  • the mounting portion and the Abtragungsground réelle form a one-piece component.
  • a recess for receiving the tool shaft is introduced, wherein the axis of the recess coincides with the drive axis of rotation.
  • the grinding or cutting tool is driven about the drive axis of rotation.
  • the fastening section and the ablation main body are arranged in relation to one another in such a way that the drive rotational axis through the fastening section simultaneously forms an axis of symmetry for the ablation main body.
  • the Abtragungsgroundêt is carried out with respect to the symmetry axis in particular point-symmetrical.
  • rotational symmetry is also considered.
  • the Abtragungsground manipulate is in alignment with the drive axis of rotation, whereby the lever arm between the drive rotational axis and the processing edge or surface is reduced to a minimum value.
  • Relative to the drive axis of rotation of the Abtragungsground réelle and the mounting portion are axially offset from one another.
  • Another advantage is that the moment of inertia is reduced.
  • smaller sized drive motors can be used in the machine tool.
  • the machining edge or surface either over its entire length or surface at a distance from the drive axis of rotation or, according to an alternative embodiment, the machining edge or surface is cut from the drive axis of rotation, so that at least one point or a small area coincides directly with the drive axis of rotation. In both cases, however, also have the spaced apart from the drive axis of rotation portions only a relatively small distance.
  • the ablation main body has a flat bearing side, which rests on the workpiece during workpiece machining and on which the machining edge or surface is formed.
  • the flat bearing side can be made flat or curved, for example convex bent outward.
  • the side edge is located in the side area of the support side, whereas the resting on the workpiece underside of the support side is not used for removal and workpiece machining, but only for support.
  • a mounting recess is arranged in the support side of the Abtragungsground stresses expediently, which is arranged coaxially to the drive axis of rotation.
  • This mounting recess allows the insertion of a tool over which, for example, a nut can be tightened or released, which is part of a fastening device for attachment of the grinding or cutting tool to the tool shaft.
  • the abstützungsgrundSuper having the flat bearing surface is formed for example U-shaped.
  • the ablation base body is advantageously connected to two wall regions, for example the two legs of the U-shape, with the opposite edge regions of the fastening section, so that an at least substantially closed hollow body is formed, which has a relatively high rigidity.
  • the AbtragungsgrundSuper on an inner shoulder which serves to receive a fastening element of the fastening device, via which the grinding or cutting tool is attached to the machine tool or the tool shaft.
  • a support and guide section is formed on the AbtragungsgroundME, which projects beyond the AbtragungsgroundSuper transversely to the drive axis of rotation.
  • the support and guide portion allows a resting of the grinding or cutting tool on the workpiece to be machined at the beginning of the machining process, which simplifies the processing.
  • two support and guide sections on Abtragungsgroundêt molded, so that in two places a support on the workpiece is possible.
  • the attachment portion is divided into two separate halves, which are each connected to the Abtragungsgroundêt.
  • the dividing line between the halves preferably extends symmetrically through the attachment portion, in particular through the recess in the attachment portion for receiving the tool shaft.
  • the fastening portion is firmly anchored with two halves in the fastening device, via which the connection is made to the tool shaft, so that no weakening in the stability of the grinding or cutting tool is given.
  • the fastening section and the ablation base body are formed in one piece.
  • FIGS. 1 to 3 a first embodiment of a cutting or grinding tool 1 is shown, which can be used in machine tools, in particular hand tool machines with rotary drive.
  • the rotary drive is either a continuous rotation in one direction or a rotary oscillation drive.
  • the cutting or grinding tool 1 comprises a fastening section 2 and an ablation base body 3 for workpiece machining formed integrally with the fastening section 2.
  • a central recess 4 is introduced, which serves to receive a tool shaft 5, the drive axis of rotation is denoted by 6.
  • the drive axis of rotation 6 at the same time forms an axis of symmetry both for the attachment section 2 and for the removal base body 3, which lies in alignment with the axis of symmetry.
  • the fastening section 2 and the ablation base body 3 are axially offset from one another.
  • a series of smaller recesses 7 are introduced in a circle around the central recess 4, protrude into the knob-shaped elevations of a fastening device, which is fixedly connected to the tool shaft 5. In this way, the torque is transmitted from the tool shaft 5 to the cutting or grinding tool 1.
  • the attachment portion 2 is divided symmetrically into two halves 2a and 2b, which are separated from each other by a parting line 8, which is guided centrally through the central recess 4.
  • the two halves 2 a and 2 b of the fastening portion 2 are clamped by the fastening device, via which the attachment of the cutting or grinding tool 1 takes place on the tool shaft 5.
  • the AbtragungsgroundSuper 3 is bent convexly outwards, in particular bent part-circular, wherein the outer side forms a support side 9, which rests in the workpiece machining on the workpiece top.
  • the front edge of the AbtragungsgroundMechs 3 forms a processing edge 10, which is designed as a cutting or grinding edge.
  • the opposite side edge of AbtragungsgroundMechs 3 may form a machining edge for workpiece machining.
  • a mounting recess 11 is inserted, which is aligned with the drive axis of rotation 6.
  • a tool can be inserted for fixing or for releasing the cutting or grinding tool 1 on the tool shaft 5 from below, for example, to be able to solve a fastening nut.
  • the bearing surfaces 12 are one-piece part of the AbtragungsgroundMechs 3 and are bounded on its outer side by vertical wall sections 13, via which the one-piece connection to the overhead mounting portion 2 takes place.
  • laterally projecting support and guide portions 14 are formed, which are placed at the beginning of the workpiece machining on the top of the workpiece and thereby provide improved guidance for the power tool.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Erfindung bezieht sich auf ein Schleif- bzw. Schneidwerkzeug für eine Werkzeugmaschine mit Drehantrieb nach dem Oberbegriff des Anspruches 1.The invention relates to a grinding or cutting tool for a machine tool with rotary drive according to the preamble of claim 1.

Stand der TechnikState of the art

In der EP 0 487 948 B1 wird ein Schleif- bzw. Schneidwerkzeug für eine Handwerkzeugmaschine mit Drehoszillationsantrieb beschrieben. Das Schleif- bzw. Schneidwerkzeug weist einen Abtragungsgrundkörper mit U-förmigem Querschnitt auf, dessen Stirnseiten Schneidkanten bilden. Der Abtragungsgrundkörper ist einteilig mit einem Befestigungsabschnitt ausgeführt, über den das Werkzeug lösbar an der Werkzeugwelle zu befestigen ist. Der Befestigungsabschnitt erstreckt sich quer zum U-förmigen Abtragsgrundkörper und ist einteilig mit einem Schenkel des Grundkörpers ausgebildet. Der Befestigungsabschnitt ist im Bereich seines dem U-förmigen Abtragungsgrundkörper abgewandten Bereichs mit der Werkzeugwelle verbunden, deren Antriebsdrehachse parallel versetzt zu den Schenkeln des Abtragungsgrundkörpers verläuft. Bei der Drehoszillationsbewegung wird somit der U-förmige Abtragungsgrundkörper mit einem verhältnismäßig langen Hebel zur Antriebsdrehachse verschwenkt.In the EP 0 487 948 B1 a grinding or cutting tool for a hand tool with rotary oscillation drive is described. The grinding or cutting tool has a Abtragungsgrundkörper with U-shaped cross section, whose end faces form cutting edges. The Abtragungsgrundkörper is made in one piece with a mounting portion over which the tool is releasably secured to the tool shaft. The attachment portion extends transversely to the U-shaped Abtragsgrundkörper and is integrally formed with a leg of the body. In the region of its region remote from the U-shaped ablation body, the fastening section is connected to the tool shaft, whose drive axis of rotation extends parallel to the legs of the ablation main body. In the rotary oscillation movement of the U-shaped Abtragungsgrundkörper is thus pivoted with a relatively long lever to the drive axis of rotation.

Hierbei ist zu beachten, dass auf Grund des großen Hebels bei der Werkstückbearbeitung verhältnismäßig große Kräfte bzw. Momente in die Werkzeugmaschine eingeleitet werden und vom Benutzer abgestützt werden müssen. Die hohen Kräfte und Momente belasten den Benutzer und können zu einer Reduzierung der Standzeit der Maschine führen.It should be noted that due to the large lever in the workpiece machining relatively large forces or moments are introduced into the machine tool and must be supported by the user. The high forces and moments burden the user and can lead to a reduction in the service life of the machine.

Aus der US 2009/0239455 A1 ist ein Schleif- bzw. Schneidwerkzeug bekannt, welches einen Abtragungsgrundkörper mit flächiger Auflageseite aufweist, die bei der Werkstückbearbeitung auf dem Werkstück aufliegt. Der Abtragungsgrundkörper weist eine seitliche Bearbeitungskante auf. Der Abtragungsgrundkörper besitzt einen C-förmigen Querschnitt, wobei die konvexe Außenseite die Auflageseite bildet. Die Endabschnitte des C-förmigen Querschnittes sind über eine Befestigungsplatte miteinander verbunden, die über Niete am Abtragungsgrundkörper befestigt ist. Die Befestigungsplatte weist eine zentrale Ausnehmung zur Befestigung an der Werkzeugwelle auf.From the US 2009/0239455 A1 a grinding or cutting tool is known, which has a Abtragungsgrundkörper with flat bearing side, which at the workpiece machining rests on the workpiece. The ablation body has a lateral processing edge. The Abtragungsgrundkörper has a C-shaped cross section, wherein the convex outer side forms the support side. The end portions of the C-shaped cross-section are connected to each other via a mounting plate which is fastened via rivets on Abtragungsgrundkörper. The mounting plate has a central recess for attachment to the tool shaft.

Offenbarung der ErfindungDisclosure of the invention

Der Erfindung liegt die Aufgabe zu Grunde, mit einfachen konstruktiven Maßnahmen ein Schleif- bzw. Schneidwerkzeug für eine Werkzeugmaschine mit Drehantrieb so auszubilden, dass die auf die Werkzeugmaschine wirkenden Kräfte reduziert sind und die Standzeit erhöht ist.The invention is based on the object with simple constructive measures a grinding or cutting tool for a machine tool with rotary drive in such a way that the forces acting on the machine tool forces are reduced and the service life is increased.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruches 1 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an.This object is achieved with the features of claim 1. The dependent claims indicate expedient developments.

Das erfindungsgemäße Schleif- bzw. Schneidwerkzeug kann in Werkzeugmaschinen, insbesondere in Handwerkzeugmaschinen mit Drehantrieb eingesetzt werden, beispielsweise zur Erzeugung von Nuten. In Betracht kommen sowohl Antriebe mit nur einer Drehrichtung als auch Drehoszillationsantriebe mit wechselnder Drehrichtung. Der Antrieb in der Werkzeugmaschine erfolgt vorzugsweise über einen elektrischen Antriebsmotor.The grinding or cutting tool according to the invention can be used in machine tools, in particular in handheld power tools with rotary drive, for example for the production of grooves. Both drives with only one direction of rotation and rotary oscillating drives with alternating direction of rotation are considered. The drive in the machine tool is preferably via an electric drive motor.

Das Schleif- bzw. Schneidwerkzeug weist einen Abtragungsgrundkörper sowie einen Befestigungsabschnitt auf. Der Abtragungsgrundkörper besitzt eine Bearbeitungskante oder eine Bearbeitungsfläche und dient zur Werkstückbearbeitung, wohingegen über den Befestigungsabschnitt eine lösbare Verbindung mit der Werkzeugwelle der Werkzeugmaschine hergestellt wird. Der Befestigungsabschnitt und derAbtragungsgrundkörper bilden ein einteilig ausgeführtes Bauteil.The grinding or cutting tool has a Abtragungsgrundkörper and a mounting portion. The Abtragungsgrundkörper has a processing edge or a processing surface and is used for workpiece machining, whereas over the mounting portion a releasable connection with the tool shaft of the machine tool is made. The mounting portion and the Abtragungsgrundkörper form a one-piece component.

In den Befestigungsabschnitt ist eine Ausnehmung zur Aufnahme der Werkzeugwelle eingebracht, wobei die Achse der Ausnehmung mit der Antriebsdrehachse zusammenfällt. Im montierten Zustand und bei Betrieb der Werkzeugmaschine wird das Schleif- bzw. Schneidwerkzeug um die Antriebsdrehachse angetrieben.In the attachment portion a recess for receiving the tool shaft is introduced, wherein the axis of the recess coincides with the drive axis of rotation. In the mounted state and during operation of the machine tool, the grinding or cutting tool is driven about the drive axis of rotation.

Der Befestigungsabschnitt und der Abtragungsgrundkörper sind in der Weise zueinander angeordnet, dass die Antriebsdrehachse durch den Befestigungsabschnitt zugleich eine Symmetrieachse für den Abtragungsgrundkörper bildet. Der Abtragungsgrundkörper ist bezogen auf die Symmetrieachse insbesondere punktsymmetrisch ausgeführt. Gegebenenfalls kommt auch Rotationssymmetrie in Betracht.The fastening section and the ablation main body are arranged in relation to one another in such a way that the drive rotational axis through the fastening section simultaneously forms an axis of symmetry for the ablation main body. The Abtragungsgrundkörper is carried out with respect to the symmetry axis in particular point-symmetrical. Optionally, rotational symmetry is also considered.

In dieser Ausführung liegt der Abtragungsgrundkörper in einer Flucht mit der Antriebsdrehachse, wodurch der Hebelarm zwischen der Antriebsdrehachse und der Bearbeitungskante bzw. -fläche auf einen Minimalwert verkürzt wird. Bezogen auf die Antriebsdrehachse sind der Abtragungsgrundkörper und der Befestigungsabschnitt axial versetz zueinander angeordnet. Dadurch werden Reaktionskräfte, die bei der Werkstückbearbeitung entstehen, minimiert, so dass die Belastung auf die Werkzeugmaschine und auch für den Bearbeiter entsprechend reduziert und die Standzeit erhöht ist.In this embodiment, the Abtragungsgrundkörper is in alignment with the drive axis of rotation, whereby the lever arm between the drive rotational axis and the processing edge or surface is reduced to a minimum value. Relative to the drive axis of rotation of the Abtragungsgrundkörper and the mounting portion are axially offset from one another. As a result, reaction forces that arise during workpiece machining are minimized, so that the load on the machine tool and also for the processor is reduced accordingly and the service life is increased.

Ein weiterer Vorteil liegt darin, dass das Massenträgheitsmoment reduziert ist. Somit können kleiner dimensionierte Antriebsmotoren in der Werkzeugmaschine eingesetzt werden.Another advantage is that the moment of inertia is reduced. Thus, smaller sized drive motors can be used in the machine tool.

Je nach Ausführung weist die Bearbeitungskante bzw. -fläche entweder über ihre gesamte Länge bzw. Fläche einen Abstand zur Antriebsdrehachse auf oder, gemäß einer alternativen Ausführung, die Bearbeitungskante bzw. -fläche wird von der Antriebsdrehachse geschnitten, so dass mindestens ein Punkt bzw. ein kleiner Bereich unmittelbar mit der Antriebsdrehachse zusammenfällt. In beiden Fällen weisen aber auch die zur Antriebsdrehachse beabstandeten Abschnitte nur einen verhältnismäßig kleinen Abstand auf.Depending on the design, the machining edge or surface either over its entire length or surface at a distance from the drive axis of rotation or, according to an alternative embodiment, the machining edge or surface is cut from the drive axis of rotation, so that at least one point or a small area coincides directly with the drive axis of rotation. In both cases, however, also have the spaced apart from the drive axis of rotation portions only a relatively small distance.

Es können grundsätzlich konstruktiv verschieden aufgebaute Schleif- bzw. Schneidwerkzeuge mit dem Abtragungsgrundkörper in einer Flucht mi der Antriebsdrehachse vorgesehen sein. Erfindungsgemäß weist der Abtragungsgrundkörper eine flächige Auflageseite auf, die bei der Werkstückbearbeitung auf dem Werkstück aufliegt und an der die Bearbeitungskante bzw. -fläche gebildet ist. Die flächige Auflageseite kann eben oder gebogen ausgeführt sein, beispielsweise konvex nach außen gebogen. Vorteilhafterweise bildet eine Seitenkante des Abtragungsgrundkörpers eine Bearbeitungskante, die beispielsweise im Sinne einer Schnittkante als Messer, Säge oder partikelbestückte Schneide ausgeführt sein kann. Im Falle des Abtragungsgrundkörpers mit flächiger Auflageseite befindet sich die Seitenkante im Seitenbereich der Auflageseite, wohingegen die auf dem Werkstück aufliegende Unterseite der Auflageseite nicht zur Abtragung und Werkstückbearbeitung dient, sondern nur zur Abstützung.In principle, constructively differently constructed grinding or cutting tools can be provided with the ablation main body in alignment with the drive axis of rotation. According to the invention, the ablation main body has a flat bearing side, which rests on the workpiece during workpiece machining and on which the machining edge or surface is formed. The flat bearing side can be made flat or curved, for example convex bent outward. Advantageously, forms a side edge of Abtragungsgrundkörpers a processing edge, which may be performed for example in the sense of a cutting edge as a knife, saw or particle-equipped cutting edge. In the case of Abtragungsgrundkörpers with flat bearing side, the side edge is located in the side area of the support side, whereas the resting on the workpiece underside of the support side is not used for removal and workpiece machining, but only for support.

Um das Schleif- bzw. Schneidwerkzeug an der Werkzeugwelle sichern und wieder lösen zu können, ist in die Auflageseite des Abtragungsgrundkörpers zweckmäßigerweise eine Montageausnehmung eingebracht, die koaxial zur Antriebsdrehachse angeordnet ist. Diese Montageausnehmung erlaubt das Einführen eines Werkzeugs, über das beispielsweise eine Mutter festgezogen bzw. gelöst werden kann, welche Teil einer Befestigungseinrichtung zur Befestigung des Schleif- bzw. Schneidwerkzeugs an der Werkzeugwelle ist.In order to secure the grinding or cutting tool on the tool shaft and to be able to solve again, a mounting recess is arranged in the support side of the Abtragungsgrundkörpers expediently, which is arranged coaxially to the drive axis of rotation. This mounting recess allows the insertion of a tool over which, for example, a nut can be tightened or released, which is part of a fastening device for attachment of the grinding or cutting tool to the tool shaft.

Der die flächige Auflagefläche aufweisende Abtragungsgrundkörper ist beispielsweise U-förmig ausgebildet. Der Abtragungsgrundkörper ist vorteilhafterweise mit zwei Wandbereichen, beispielsweise den beiden Schenkeln der U-Form, mit den gegenüberliegenden Randbereichen des Befestigungsabschnitts verbunden, so dass ein zumindest im Wesentlichen geschlossener Hohlkörper entsteht, der eine verhältnismäßig hohe Steifigkeit aufweist.The abstützungsgrundkörper having the flat bearing surface is formed for example U-shaped. The ablation base body is advantageously connected to two wall regions, for example the two legs of the U-shape, with the opposite edge regions of the fastening section, so that an at least substantially closed hollow body is formed, which has a relatively high rigidity.

Gemäß einer weiteren vorteilhaften Ausführung weist der Abtragungsgrundkörper einen innen liegenden Absatz auf, der zur Aufnahme eines Befestigungselements der Befestigungseinrichtung dient, über die das Schleif- bzw. Schneidwerkzeug mit der Werkzeugmaschine bzw. der Werkzeugwelle befestigt wird.According to a further advantageous embodiment, the Abtragungsgrundkörper on an inner shoulder, which serves to receive a fastening element of the fastening device, via which the grinding or cutting tool is attached to the machine tool or the tool shaft.

Gemäß einer weiteren vorteilhaften Ausführung ist an dem Abtragungsgrundkörper ein Auflage- und Führungsabschnitt angeformt, der den Abtragungsgrundkörper quer zur Antriebsdrehachse überragt. Der Auflage- und Führungsabschnitt ermöglicht ein Aufliegen des Schleif- bzw. Schneidwerkzeugs auf dem zu bearbeitenden Werkstück zu Beginn des Bearbeitungsvorgangs, was die Bearbeitung vereinfacht. Gegebenenfalls sind zwei Auflage- und Führungsabschnitte am Abtragungsgrundkörper angeformt, so dass an zwei Stellen eine Abstützung am Werkstück möglich ist.According to a further advantageous embodiment, a support and guide section is formed on the Abtragungsgrundkörper, which projects beyond the Abtragungsgrundkörper transversely to the drive axis of rotation. The support and guide portion allows a resting of the grinding or cutting tool on the workpiece to be machined at the beginning of the machining process, which simplifies the processing. Optionally, two support and guide sections on Abtragungsgrundkörper molded, so that in two places a support on the workpiece is possible.

Es ist erfindungsgemäß vorgesehen, dass der Befestigungsabschnitt in zwei separate Hälften unterteilt ist, die jeweils mit dem Abtragungsgrundkörper verbunden sind. Die Trennlinie zwischen den Hälften verläuft vorzugsweise symmetrisch durch den Befestigungsabschnitt, insbesondere durch die Ausnehmung im Befestigungsabschnitt zur Aufnahme der Werkzeugwelle. Im montierten Zustand ist der Befestigungsabschnitt mit beiden Hälften fest in der Befestigungseinrichtung verankert, über die die Verbindung zur Werkzeugwelle hergestellt wird, so dass keine Schwächung in der Stabilität des Schleif- bzw. Schneidwerkzeugs gegeben ist.It is inventively provided that the attachment portion is divided into two separate halves, which are each connected to the Abtragungsgrundkörper. The dividing line between the halves preferably extends symmetrically through the attachment portion, in particular through the recess in the attachment portion for receiving the tool shaft. In the assembled state, the fastening portion is firmly anchored with two halves in the fastening device, via which the connection is made to the tool shaft, so that no weakening in the stability of the grinding or cutting tool is given.

Erfindungsgemäß ist es vorgesehen, dass der Befestigungsabschnitt und der Abtragungsgrundkörper einteilig ausgebildet sind.According to the invention, it is provided that the fastening section and the ablation base body are formed in one piece.

Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:

Fig. 1
eine perspektivische Darstellung eines Schleif- bzw. Schneidwerkzeugs für eine Werkzeugmaschine, mit einem als Hohlkörper ausgebildeten Abtragungsgrundkörper, an dem einteilig ein Befestigungsabschnitt angeformt ist, über den das Schleif- bzw. Schneidwerkzeug lösbar an der Werkzeugwelle einer Werkzeugmaschine zu befestigen ist,
Fig. 2
das Schleif- bzw. Schneidwerkzeug aus Fig. 1 in einer weiteren perspektivischen Ansicht,
Fig. 3
das Schleif- bzw. Schneidwerkzeug in noch einer perspektivischen Ansicht,
Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:
Fig. 1
a perspective view of a grinding or cutting tool for a machine tool, with a designed as a hollow Abtragungsgrundkörper on which integrally an attachment portion is integrally formed, via which the grinding or cutting tool is releasably secured to the tool shaft of a machine tool,
Fig. 2
the grinding or cutting tool Fig. 1 in a further perspective view,
Fig. 3
the grinding or cutting tool in another perspective view,

In den Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen.In the figures, the same components are provided with the same reference numerals.

In den Figuren 1 bis 3 ist ein erstes Ausführungsbeispiel eines Schneid- bzw. Schleifwerkzeugs 1 dargestellt, das in Werkzeugmaschinen, insbesondere Handwerkzeugmaschinen mit Drehantrieb einsetzbar ist. Bei dem Drehantrieb handelt es sich entweder um eine fortlaufende Drehung in einer Richtung oder um einen Drehoszillationsantrieb.In the FIGS. 1 to 3 a first embodiment of a cutting or grinding tool 1 is shown, which can be used in machine tools, in particular hand tool machines with rotary drive. The rotary drive is either a continuous rotation in one direction or a rotary oscillation drive.

Das Schneid- bzw. Schleifwerkzeug 1 umfasst einen Befestigungsabschnitt 2 und einen einteilig mit dem Befestigungsabschnitt 2 ausgebildeten Abtragungsgrundkörper 3 zur Werkstückbearbeitung. In den Befestigungsabschnitt 2 ist eine zentrische Ausnehmung 4 eingebracht, die zur Aufnahme einer Werkzeugwelle 5 dient, deren Antriebsdrehachse mit 6 bezeichnet ist. Die Antriebsdrehachse 6 bildet zugleich eine Symmetrieachse sowohl für den Befestigungsabschnitt 2 als auch für den Abtragungsgrundkörper 3, der in einer Flucht mit der Symmetrieachse liegt. Bezogen auf die Antriebsdrehachse 6 liegen der Befestigungsabschnitt 2 und der Abtragungsgrundkörper 3 axial versetzt zueinander.The cutting or grinding tool 1 comprises a fastening section 2 and an ablation base body 3 for workpiece machining formed integrally with the fastening section 2. In the mounting portion 2, a central recess 4 is introduced, which serves to receive a tool shaft 5, the drive axis of rotation is denoted by 6. The drive axis of rotation 6 at the same time forms an axis of symmetry both for the attachment section 2 and for the removal base body 3, which lies in alignment with the axis of symmetry. Relative to the drive rotational axis 6, the fastening section 2 and the ablation base body 3 are axially offset from one another.

In den Befestigungsabschnitt 2 sind in einem Kreis um die zentrische Ausnehmung 4 eine Reihe kleinerer Ausnehmungen 7 eingebracht, in die noppenförmige Erhebungen einer Befestigungseinrichtung einragen, welches fest mit der Werkzeugwelle 5 verbunden ist. Auf diese Weise wird das Drehmoment von der Werkzeugwelle 5 auf das Schneid- bzw. Schleifwerkzeug 1 übertragen.In the mounting portion 2, a series of smaller recesses 7 are introduced in a circle around the central recess 4, protrude into the knob-shaped elevations of a fastening device, which is fixedly connected to the tool shaft 5. In this way, the torque is transmitted from the tool shaft 5 to the cutting or grinding tool 1.

Grundsätzlich kommen auch alternative Schnittstellengeometrien zur Verbindung des Befestigungsabschnitts 2 mit der Befestigungseinrichtung an der Werkzeugwelle 5 in Betracht.In principle, alternative interface geometries for connecting the fastening section 2 to the fastening device on the tool shaft 5 come into consideration.

Der Befestigungsabschnitt 2 ist symmetrisch in zwei Hälften 2a und 2b unterteilt, die durch eine Trennlinie 8 voneinander separiert sind, welche mittig durch die zentrische Ausnehmung 4 geführt ist. Im montierten Zustand werden die beiden Hälften 2a und 2b des Befestigungsabschnitts 2 von der Befestigungseinrichtung festgeklemmt, über die die Befestigung des Schneid- bzw. Schleifwerkzeugs 1 an der Werkzeugwelle 5 erfolgt.The attachment portion 2 is divided symmetrically into two halves 2a and 2b, which are separated from each other by a parting line 8, which is guided centrally through the central recess 4. In the assembled state, the two halves 2 a and 2 b of the fastening portion 2 are clamped by the fastening device, via which the attachment of the cutting or grinding tool 1 takes place on the tool shaft 5.

Der Abtragungsgrundkörper 3 ist konvex nach außen gebogen, insbesondere teilkreisförmig gebogen, wobei die außen liegende Seite eine Auflageseite 9 bildet, welche bei der Werkstückbearbeitung auf der Werkstückoberseite aufliegt. Die Vorderkante des Abtragungsgrundkörpers 3 bildet eine Bearbeitungskante 10, die als Schneid- oder Schleifkante ausgeführt ist. Auch die gegenüberliegende Seitenkante des Abtragungsgrundkörpers 3 kann eine Bearbeitungskante zur Werkstückbearbeitung bilden.The Abtragungsgrundkörper 3 is bent convexly outwards, in particular bent part-circular, wherein the outer side forms a support side 9, which rests in the workpiece machining on the workpiece top. The front edge of the Abtragungsgrundkörpers 3 forms a processing edge 10, which is designed as a cutting or grinding edge. Also, the opposite side edge of Abtragungsgrundkörpers 3 may form a machining edge for workpiece machining.

In den Abtragungsgrundkörper 3 ist eine Montageausnehmung 11 eingebracht, die mit der Antriebsdrehachse 6 fluchtet. Durch die Montageausnehmung 11 kann zur Befestigung bzw. zum Lösen des Schneid- bzw. Schleifwerkzeugs 1 an der Werkzeugwelle 5 von unten ein Werkzeug eingeführt werden, um beispielsweise eine Befestigungsmutter lösen zu können.In the Abtragungsgrundkörper 3 a mounting recess 11 is inserted, which is aligned with the drive axis of rotation 6. Through the mounting recess 11, a tool can be inserted for fixing or for releasing the cutting or grinding tool 1 on the tool shaft 5 from below, for example, to be able to solve a fastening nut.

Der teilkreisförmig gebogene Abtragungsgrundkörper 3 geht benachbart zum oben liegenden Befestigungsabschnitt 2 in horizontale, nach außen gerichtete Auflageflächen 12 über, die jeweils einen innen liegenden Absatz zur Aufnahme eines Befestigungselements der Befestigungseinrichtung bilden, über das die Befestigung des Schneid- bzw. Schleifwerkzeugs mit der Werkzeugwelle erfolgt. Die Auflageflächen 12 sind einteiliger Bestandteil des Abtragungsgrundkörpers 3 und werden an ihrer Außenseite von vertikalen Wandabschnitten 13 begrenzt, über die die einteilige Verbindung zum oben liegenden Befestigungsabschnitt 2 erfolgt.The part-circular curved Abtragungsgrundkörper 3 adjacent to the overhead mounting portion 2 in horizontal, outwardly directed bearing surfaces 12, which each form an inner shoulder for receiving a fastener of the fastening device, via which the attachment of the cutting or grinding tool with the tool shaft , The bearing surfaces 12 are one-piece part of the Abtragungsgrundkörpers 3 and are bounded on its outer side by vertical wall sections 13, via which the one-piece connection to the overhead mounting portion 2 takes place.

An den Auflageflächen 12 sind seitlich überstehende Auflage- und Führungsabschnitte 14 angeformt, welche zu Beginn der Werkstückbearbeitung auf die Oberseite des Werkstückes aufgelegt werden und hierdurch eine verbesserte Führung für die Handwerkzeugmaschine bieten.At the bearing surfaces 12 laterally projecting support and guide portions 14 are formed, which are placed at the beginning of the workpiece machining on the top of the workpiece and thereby provide improved guidance for the power tool.

Claims (8)

  1. Grinding or cutting tool for a power tool with a rotary drive, having a fastening portion (2) for connecting to a tool shaft (5) of the power tool and having a main material removing body (3) for workpiece machining, wherein the main material removing body (3) has a machining edge (10) or face and the drive rotation axis (6) through the fastening portion (2) forms an axis of symmetry of the main material removing body (3), wherein the machining edge (10) or face is located at least partially at a distance from the drive rotation axis (6), wherein the main material removing body (3) has an extensive bearing side (9) which bears against the workpiece during workpiece machining and on which the machining edge (10) or face is formed, characterized in that the fastening portion (2) and the main material removing body (3) are formed in one piece, and in that the fastening portion (2) is subdivided into two separate halves (2a, 2b) which are each connected to the main material removing body (3), wherein the parting line (8) between the halves (2a, 2b) extends symmetrically through a cutout (4) in the fastening portion (2) for receiving the tool shaft.
  2. Grinding or cutting tool according to Claim 1, characterized in that the bearing side (9) is curved convexly towards the outside.
  3. Grinding or cutting tool according to Claim 1 or 2, characterized in that one side edge of the bearing side (9) of the main material removing body forms the machining edge (10).
  4. Grinding or cutting tool according to one of Claims 1 to 3, characterized in that a mounting cutout (11) that is coaxial with the drive rotation axis (6) has been introduced into the bearing side (9).
  5. Grinding or cutting tool according to one of Claims 1 to 4, characterized in that the main material removing body (3) is connected to opposite peripheral regions of the fastening portion (2).
  6. Grinding or cutting tool according to one of Claims 1 to 5, characterized in that the main material removing body (3) has an internal shoulder for holding a fastening element for fastening to the power tool.
  7. Grinding or cutting tool according to one of Claims 1 to 6, characterized in that a bearing and guiding portion (14) is integrally formed on the main material removing body (3), said bearing and guiding portion (14) protruding beyond the main material removing body (3) transversely to the drive rotation axis (6).
  8. Power tool having a grinding or cutting tool according to one of Claims 1 to 7.
EP12735550.1A 2011-09-02 2012-07-17 Grinding or cutting tool for a machine tool with a rotary drive Active EP2750831B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011082035A DE102011082035A1 (en) 2011-09-02 2011-09-02 Grinding or cutting tool for a machine tool with rotary drive
PCT/EP2012/063986 WO2013029868A1 (en) 2011-09-02 2012-07-17 Grinding or cutting tool for a machine tool with a rotary drive

Publications (2)

Publication Number Publication Date
EP2750831A1 EP2750831A1 (en) 2014-07-09
EP2750831B1 true EP2750831B1 (en) 2015-11-18

Family

ID=46514379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12735550.1A Active EP2750831B1 (en) 2011-09-02 2012-07-17 Grinding or cutting tool for a machine tool with a rotary drive

Country Status (3)

Country Link
EP (1) EP2750831B1 (en)
DE (1) DE102011082035A1 (en)
WO (1) WO2013029868A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940743A1 (en) * 1989-12-09 1991-06-13 Chicago Pneumatic Tool Gmbh Portable saw for trepanning holes and hole segments - has oscillatory drive to cup-shaped cutter having edge chosen to suit material
DE4135573A1 (en) 1990-11-28 1992-06-04 Fein C & E METHOD AND DEVICE FOR MAKING SURFACE CHANNELS IN PLATE MATERIAL FROM SOFT MATERIAL AND USE OF A DEVICE
DE29825263U1 (en) * 1997-05-28 2007-10-25 Maroc Gmbh cutting tool
TWI238753B (en) * 2002-12-19 2005-09-01 Miyanaga Kk Diamond disk for grinding
DE102006055523A1 (en) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Swing swing tool
US8210909B2 (en) * 2008-03-24 2012-07-03 Robert Bosch Gmbh Abrading system
DE202008009525U1 (en) * 2008-07-08 2009-11-19 C. & E. Fein Gmbh Tool with a mounting hole for positive connection with various oscillating drivable drive shafts
DE202009008427U1 (en) * 2009-06-15 2010-11-04 C. & E. Fein Gmbh cutting tool

Also Published As

Publication number Publication date
DE102011082035A1 (en) 2013-03-07
EP2750831A1 (en) 2014-07-09
WO2013029868A1 (en) 2013-03-07

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