EP2286959A2 - Scrubbing-grinding tool - Google Patents

Scrubbing-grinding tool Download PDF

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Publication number
EP2286959A2
EP2286959A2 EP10167695A EP10167695A EP2286959A2 EP 2286959 A2 EP2286959 A2 EP 2286959A2 EP 10167695 A EP10167695 A EP 10167695A EP 10167695 A EP10167695 A EP 10167695A EP 2286959 A2 EP2286959 A2 EP 2286959A2
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EP
European Patent Office
Prior art keywords
grinding
fiber
tool according
grinding tool
radius
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.)
Granted
Application number
EP10167695A
Other languages
German (de)
French (fr)
Other versions
EP2286959B1 (en
EP2286959A3 (en
Inventor
Bernd Stuckenholz
Nicolas Huth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
August Rueggeberg GmbH and Co KG
Original Assignee
August Rueggeberg GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE200910038583 external-priority patent/DE102009038583A1/en
Priority claimed from DE201010029553 external-priority patent/DE102010029553A1/en
Application filed by August Rueggeberg GmbH and Co KG filed Critical August Rueggeberg GmbH and Co KG
Publication of EP2286959A2 publication Critical patent/EP2286959A2/en
Publication of EP2286959A3 publication Critical patent/EP2286959A3/en
Application granted granted Critical
Publication of EP2286959B1 publication Critical patent/EP2286959B1/en
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Anticipated expiration legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/02Wheels in one piece
    • B24D7/04Wheels in one piece with reinforcing means

Definitions

  • Such roughing-grinding tools are known in practice in large numbers.
  • Such fiber grinding wheels are flexible and releasably mounted on the support plate.
  • the mounting on the support plate is done by a screw-on flange in the Kröpfungs Society the fiber grinding wheel.
  • the service life of the fiber grinding wheel is short, for example only about 1 minute.
  • the abrasive grain of the fiber abrasive disc shows its first signs of wear, whereby the surface of the workpiece to be machined is no longer completely uniform. The fiber grinding wheel is therefore already replaced after this time.
  • Abrasive base are known, as they are common practice, which thus consist of a serving as a support or underlay elastically flexible disc on which an abrasive grain is attached by means of a synthetic resin.
  • the invention has for its object to design a roughing-grinding tool of the generic type so that it has a long service life with simple and inexpensive construction.
  • the fiber disc is made of vulcanized fiber, a material that has been known for a century and a half and made from cotton fibers. Surprisingly, it has also been found that the roughing and grinding tool is far superior to conventional roughing wheels both in terms of machined mass per unit time and overall machinable mass. This is especially true when Ceramic grain is used as an abrasive.
  • the grinding wheel with the abrasive coating is slightly convexly curved towards the grinding side.
  • Such rough grinding wheels so roughing-grinding tools are used on hand-held grinding machines, an exact angular position of the grinding tool against the surface to be ground is usually not observed when using.
  • the slight curvature causes no high local surface pressures between the grinding wheel and the workpiece to be machined, with the result of a corresponding tearing of abrasive grain occur. This leads to a considerable increase in the service life or the cutting performance.
  • the grinding portion is divided into a main grinding portion and a radially outer smaller outer grinding portion, with the outer grinding portion being curved more toward the back of the grinding tool, the risk of the grinding tool is increased Removal of the grinding wheel from the carrier plate further reduced.
  • the grinding tool can hereby also be used for a short time for face grinding.
  • FIGS. 1 to 3 illustrated roughing-grinding tool has a in the usual way from impregnated with phenolic resin and compressed glass fibers existing support plate 1, which has a flat, annular clamping area 2 in the usual way, in which a likewise circular opening 3 for receiving a drive shaft Drive machine is formed.
  • the annular clamping region 2 surrounding the opening 3 is provided with a metal ring 5 on the rear side of the support plate 1 remote from a grinding side 4.
  • the clamping area 2 is adjoined by a cranking area 6, which is likewise of annular design and rises radially to the axis 7 of the carrier plate 1 towards the grinding side 4.
  • the cranking region 6 is adjoined by an annular grinding region 8, which is inclined radially outward from the grinding side 4, counter to the cranking region 6, radially to the axis 7.
  • This embodiment of a support plate 1 is well known and common.
  • a fiber grinding wheel 9 is attached on the grinding side 4, which is a so-called abrasive on a base, which consists of a fiber disk 10 as a support or base and a resin-bonded abrasive coating 11.
  • the fiber disk 10 is made of vulcanized fiber, which is a bound, pressed material based on cotton fibers.
  • the abrasive coating 11 is formed by ceramic grain 11.1, which is produced from a microgranulate by sintering. The microgranules break individually from the respective grain, so that thereby the stability of the ceramic grain 11.1 is significantly increased compared to conventional abrasives.
  • the resin bonded abrasive pad 11 is bonded to the fiber disk 10 in the usual manner.
  • the fiber disk 10 of the fiber grinding wheel 9 is connected to the grinding side 4 of the support plate 1 by means of an adhesive layer 12.
  • the radius R1 of the support plate 1 is - like FIG. 1 can be removed - slightly smaller than the radius R9 of the fiber grinding wheel 9, without the fiber grinding wheel 9 projecting radially to the axis 7 on the outer edge 13 of the support plate 1.
  • the cranking region 6 has a radius R6 from the axis 7 at the transition to the main grinding region 8.
  • the main grinding portion 8 has a radius R8 from the axis 7 which is equal to the radius R9 of the fiber grinding disc 9.
  • the support plate 1 ' consists of a glass cloth impregnated with epoxy resin. He has - as in the embodiment of the FIGS. 1 to 3 - a constant thickness h.
  • the planar annular clamping area 2 ' is likewise formed with a circular opening 3' for receiving a drive shaft of a drive machine.
  • the annular clamping region 2 'surrounding the opening 3' is not reinforced with a metal ring in this exemplary embodiment.
  • the curvature region 6 'adjoining the clamping region 2' is likewise of annular design and rises radially to the axis 7 'of the carrier plate 1' towards the grinding side 4 '.
  • the planar clamping region 2 ' merges with a radius of curvature r2' in the cranking region 6 '.
  • the cranking region 6 ' is adjoined in turn by an annular main grinding region 8', which extends radially to the axis 7 'against the cranking region 6', namely radially to the axis 7 'outwardly from the grinding side 4' is inclined. Seen from the axis 7 'to the outside of the grinding area 8' so from the grinding side 4 'inclined away.
  • FIG. 4 Also in the design FIG. 4 is on the grinding side 4 'of the support plate 1' a fiber grinding disc 9 'attached.
  • This is also a so-called abrasive on a base, which consists of a fiber disk 10 'as a support or base and a resin-bonded abrasive coating 11'.
  • the fiber grinding wheel 9 ' is thus a self-contained grinding wheel, which could be used, as described above for the prior art according to EP 1 741 515 B1 has been described. It is flexible, so flexible.
  • the structure of the fiber grinding wheel 9 ' corresponds to the above to the FIGS. 1 to 3 already described.
  • the abrasive coating 11 'thus has ceramic grain 11.1'.
  • the fiber slice 10 'of the fiber abrasive disc 9' connected to the support plate 1 'by means of an adhesive layer 12'.
  • cranking region 6 ' is in the grinding area 8' with a radius of curvature r6 'on.
  • the main grinding area 8 'itself is also curved, slightly convex to the grinding side 4' with a radius of curvature r8 '.
  • the outer grinding area 15 'adjoining the main grinding area 8' is inclined radially outward away from the grinding side 4 'and convexly curved toward the grinding side 4' with a radius of curvature r15 '.
  • the fiber abrasive disc 9 ' has a radius R9' from the axis 7 '.
  • the offset area 6 ' has a radius R6' from the axis 7 'at the transition to the main grinding area 8'.
  • the main grinding area 8 ' has a radius R8' from the axis 7 'which is equal to the radius only R9 'of the fiber abrasive disc 9' is when there is no separate more curved outer abrasive region 15 '.
  • the radii R6 'and R8' with respect to the radius R9 ' the following applies: 0 . 45 R ⁇ 9 ⁇ ' ⁇ R ⁇ 6 ⁇ ' ⁇ 0 . 7 R ⁇ 9 ⁇ ' 0 . 75 R ⁇ 9 ⁇ ' ⁇ R ⁇ 8th ⁇ ' ⁇ R ⁇ 9 ⁇ '
  • FIG. 5 is different from that FIG. 4 in that the support plate 1 "has a radially outwardly increasing elasticity, that is to say a lower rigidity or greater flexibility
  • FIG. 4 Matching parts or areas are therefore designated by the same reference numerals and all similar parts or areas with the same reference numerals as to FIG. 4 have been used, supplemented by a double-dashed line, without requiring a new description.
  • the increasing elasticity of the support plate 1 "in the direction of the outer edge 13" is achieved in that the support plate 1 "has a plurality of respectively annular sections 16, 17 and 18, which have a different, radially outwardly decreasing thickness FIG. 5 the section 16 extends approximately as far as the transition from the cranking area 6 'into the main grinding area 8 ", here it has the thickness h, the annular section 17 extending radially outward extending radially to the outside. Grinding range 15 ".
  • the portion 17 has a thickness h '; the outer portion 18 has a thickness h ", where h> h '>h".
  • FIG. 5 assume that there are at least two such sections and no more than five such sections are. For the radii R6 ', R8 "and R9', the above relationships apply.
  • FIG. 6 the use of the roughing-grinding tool according to the invention on manual grinding machines 19 emerges.
  • the roughing-grinding tool is mounted on an output shaft 20 of the hand grinder 19, which is inserted through the opening 3 of the grinding tool, so that the axis 7 coincides with the central axis of the output shaft 20.
  • the attachment of the grinding tool on the output shaft 20 by means of a clamping nut 21st
  • the stronger curvature in the outer grinding area 15 'or 15 "causes when abutting the outer edge 13' or 13" of the grinding wheel to an object no detachment of the fiber grinding wheel 9 'together with abrasive coating 11 from the support plate. 1 'or 1 "takes place.

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

Abstract

The tool has a support plate (1) that is formed concentric to a centre longitudinal axis (7). The support plate exhibits a centre opening (3) for receiving a drive shaft of a drive machine. A fiber grinding disk (9) is formed from a fiber disk (10) with a resin-bound abrasive lining (11). The fiber grinding disk exhibits an outer annular grinding region (8) that is arranged radial to the centre longitudinal axis. The fiber grinding disk is supported or glued to the support plate using an adhesive layer (12), where the disk exhibits a grinding side (4) and made of vulcanized fiber.

Description

Die Erfindung betrifft ein Schrupp-Schleif-Werkzeug

  • mit einem Tragteller, der
    • - konzentrisch zu einer Mittel-Längs-Achse ausgebildet ist und
    • - eine mittlere Öffnung zur Aufnahme einer Antriebswelle einer Antriebsmaschine aufweist,
    und
  • mit einer Fiber-Schleifscheibe, die
    • - aus einer Fiber-Scheibe, mit einem harzgebundenen Schleifmittel-Belag gebildet ist,
    • - einen radial zur Mittel-Längs-Achse angeordneten, äußeren ringförmigen Schleif-Bereich aufweist,
    • - sich auf dem Tragteller abstützt und
    • - eine Schleifseite aufweist,
The invention relates to a roughing-grinding tool
  • with a carrier plate, the
    • - Is formed concentrically to a central longitudinal axis and
    • - Has a central opening for receiving a drive shaft of a prime mover,
    and
  • with a fiber grinding wheel that
    • - made of a fiber disc, with a resin-bonded abrasive coating,
    • having an outer annular grinding area arranged radially to the central longitudinal axis,
    • - is supported on the support plate and
    • has a grinding side,

Derartige Schrupp-Schleif-Werkzeuge sind in der Praxis in großer Zahl bekannt. Derartige Fiber-Schleifscheiben sind flexibel ausgebildet und lösbar auf dem Tragteller angebracht. Die Befestigung auf dem Tragteller erfolgt durch einen aufschraubbaren Flansch im Kröpfungsbereich der Fiber-Schleifscheibe. Bei Arbeiten, bei denen mittels des Schrupp-Schleif-Werkzeugs gleichmäßige Oberflächenstrukturen an dem zu bearbeitenden Werkstück erzielt werden müssen, ist die Standzeit der Fiber-Schleifscheibe kurz, beispielsweise nur ca. 1 Minute. Nach dieser Zeit zeigt das Schleifkorn der Fiber-Schleifscheibe erste Abnutzungserscheinungen, wodurch die Oberfläche des zu bearbeitenden Werkstücks nicht mehr vollkommen gleichmäßig wird. Die Fiber-Schleifscheibe wird daher bereits nach dieser Zeit ausgewechselt.Such roughing-grinding tools are known in practice in large numbers. Such fiber grinding wheels are flexible and releasably mounted on the support plate. The mounting on the support plate is done by a screw-on flange in the Kröpfungsbereich the fiber grinding wheel. For work in which uniform surface structures on the workpiece to be machined must be achieved by means of the roughing and grinding tool, the service life of the fiber grinding wheel is short, for example only about 1 minute. After this time, the abrasive grain of the fiber abrasive disc shows its first signs of wear, whereby the surface of the workpiece to be machined is no longer completely uniform. The fiber grinding wheel is therefore already replaced after this time.

Um ein schnelles Auswechseln derartiger Fiber-Schleifscheiben zu ermöglichen, wurde ein Schnellwechselsystem entwickelt, wie es in der EP 1 741 515 B1 dargestellt und beschrieben ist. Für den erwähnten Anwendungsfall wird feinkörniges Schleifkorn eingesetzt. Diese feinen Körnungen führen beim Schleifen zu einer großen Hitzebelastung des Werkstücks. Wenn der zu schleifende Werkstoff beispielsweise Edelstahl ist oder eine geringe Wärmeleitfähigkeit besitzt, entstehen Anlauffarben. Aus diesem Grunde wurden bei dem erwähnten Schnellwechselsystem nach der EP 1 741 515 B1 Kühlkanäle im Tragteller vorgesehen, um eine gute Kühlung der Schleifscheibe zu erreichen.In order to enable a quick replacement of such fiber grinding wheels, a quick-change system has been developed, as in the EP 1 741 515 B1 is shown and described. For the mentioned application fine-grained abrasive grain is used. These fine grains result in a high heat load on the workpiece during grinding. If the material to be ground, for example, is stainless steel or has a low thermal conductivity, tarnish occurs. For this reason, in the aforementioned quick-change system according to the EP 1 741 515 B1 Cooling channels provided in the support plate to achieve a good cooling of the grinding wheel.

Wenn zum Schruppschleifen - wie in der Praxis üblich - Schleifscheiben mit grobkörnigem Schleifmittel eingesetzt werden, dann besteht die Gefahr, dass die das Schleifmittel tragende Unterlage zerreißt. Dies gilt insbesondere, wenn als Unterlage für das Schleifmittel dienende Scheiben aus wenig festem Material eingesetzt werden.If grinding wheels with coarse abrasive are used for rough grinding, as is customary in practice, there is a risk that the backing bearing the abrasive material will break. This is especially true when serving as a base for the abrasive serving discs of little solid material.

Aus der EP 0 750 539 B1 (entsprechend DE 695 06 851 T2 ) und der EP 0 617 652 B1 (entsprechend DE 692 28 760 T2 ) sind Schleifmittel auf Unterlage bekannt, wie sie allgemein üblich sind, die also aus einer als Träger bzw. Unterlage dienenden elastisch biegsamen Scheibe bestehen, auf der mittels eines Kunstharzes ein Schleifkorn befestigt ist.From the EP 0 750 539 B1 (corresponding DE 695 06 851 T2 ) and the EP 0 617 652 B1 (corresponding DE 692 28 760 T2 ) Abrasive base are known, as they are common practice, which thus consist of a serving as a support or underlay elastically flexible disc on which an abrasive grain is attached by means of a synthetic resin.

Aus der DE 10 2006 010 366 B3 und der DE 90 17 256 U1 sind sogenannte Fächerschleifscheiben bekannt, bei denen die Schleiflamellen in der üblichen Weise auf einen Träger aufgeklebt sind.From the DE 10 2006 010 366 B3 and the DE 90 17 256 U1 So-called flap discs are known in which the abrasive blades are glued in the usual way to a carrier.

Der Erfindung liegt die Aufgabe zugrunde, ein Schrupp-Schleif-Werkzeug der gattungsgemäßen Art so auszugestalten, dass es bei einfachem und kostengünstigem Aufbau hohe Standzeiten aufweist.The invention has for its object to design a roughing-grinding tool of the generic type so that it has a long service life with simple and inexpensive construction.

Diese Aufgabe wird erfindungsgemäß bei einem Schrupp-Schleif-Werkzeug der gattungsgemäßen Art dadurch gelöst, dass die Fiber-Schleifscheibe auf den Tragteller aufgeklebt ist. Durch das Aufkleben der Fiber-Schleifscheibe auf den Tragteller hat sich überraschenderweise ergeben, dass ein Ausreißen der Fiber-Schleifscheibe trotz der hohen Belastungen beim Schruppschleifen nicht eintritt. Dies kann damit erklärt werden, dass beim Schrupp-Schleifen auftretende Drehmoment nicht vollständig von den Fasern der Fiber-Scheibe aufgenommen werden muss. Es erfolgt in erheblichem Umfang eine Übertragung auf den Tragteller. Auch bei Drehmomenten-Überlastung und beim Anstoßen der Außenkante der Fiber-Schleifscheibe an ein Werkstück kommt es nicht zum Bruch der Fiber-Schleifscheibe. Es lösen sich also keine kleineren oder größere Segmente von der Fiber-Schleifscheibe, sodass auch Verletzungen beim Benutzer weitestgehend ausgeschlossen sind.This object is achieved in a roughing-grinding tool of the generic type in that the fiber abrasive disc is adhered to the support plate. By sticking the fiber grinding wheel on the support plate has surprisingly revealed that a ripping of the fiber grinding wheel does not occur despite the high loads during rough grinding. This can be explained by the fact that torque occurring during rough grinding does not have to be completely absorbed by the fibers of the fiber disk. There is considerable transfer to the carrier plate. Even with torque overload and when abutting the outer edge of the fiber grinding wheel to a workpiece, it does not break the fiber grinding wheel. So there are no smaller or larger segments of the fiber grinding disc, so that injury to the user are largely excluded.

Die Fiber-Scheibe besteht aus Vulkanfiber, einem Material, das seit eineinhalb Jahrhunderten bekannt und auf der Basis von Baumwollfasern hergestellt ist. Überraschenderweise hat sich weiterhin ergeben, dass das Schrupp-Schleif-Werkzeug sowohl hinsichtlich der zerspanten Masse pro Zeiteinheit als auch hinsichtlich der gesamten zerspanbaren Masse konventionellen Schrupp-Schleifscheiben weit überlegen ist. Dies gilt insbesondere, wenn Ceramic-Korn als Schleifmittel eingesetzt wird.The fiber disc is made of vulcanized fiber, a material that has been known for a century and a half and made from cotton fibers. Surprisingly, it has also been found that the roughing and grinding tool is far superior to conventional roughing wheels both in terms of machined mass per unit time and overall machinable mass. This is especially true when Ceramic grain is used as an abrasive.

Als besonders vorteilhaft hat es sich erwiesen, wenn die Schleifscheibe mit dem Schleifmittel-Belag zur Schleifseite hin leicht konvex gewölbt ist. Da derartige Schrupp-Schleifscheiben, also Schrupp-Schleif-Werkzeuge, an handgeführten Schleifmaschinen eingesetzt werden, wird beim Einsatz eine exakte Winkelposition des Schleif-Werkzeugs gegenüber der zu schleifenden Fläche in der Regel nicht eingehalten. Die leichte Wölbung führt dazu, dass keine hohen lokalen Flächenpressungen zwischen der Schleif-Scheibe und dem zu bearbeitenden Werkstück mit der Folge eines entsprechenden Ausreißens von Schleifkorn auftreten. Dies führt zu einer erheblichen Erhöhung der Standzeit bzw. der Zerspanungsleistung. Wenn weiterhin der Schleif-Bereich in einen Haupt-Schleif-Bereich und einen radial äußeren kleineren Außen-Schleif-Bereich unterteilt ist, wobei der Außen-Schleif-Bereich noch stärker zur Rückseite des Schleif-Werkzeugs hin gekrümmt ist, dann wird die Gefahr des Ablösens der Schleifscheibe vom Tragteller weiter reduziert. Außerdem kann das Schleif-Werkzeug hiermit auch kurzzeitig zum Stirnschleifen eingesetzt werden.It has proven particularly advantageous if the grinding wheel with the abrasive coating is slightly convexly curved towards the grinding side. There Such rough grinding wheels, so roughing-grinding tools are used on hand-held grinding machines, an exact angular position of the grinding tool against the surface to be ground is usually not observed when using. The slight curvature causes no high local surface pressures between the grinding wheel and the workpiece to be machined, with the result of a corresponding tearing of abrasive grain occur. This leads to a considerable increase in the service life or the cutting performance. Further, when the grinding portion is divided into a main grinding portion and a radially outer smaller outer grinding portion, with the outer grinding portion being curved more toward the back of the grinding tool, the risk of the grinding tool is increased Removal of the grinding wheel from the carrier plate further reduced. In addition, the grinding tool can hereby also be used for a short time for face grinding.

Die weiteren Unteransprüche geben vorteilhafte Weiterbildungen wieder.The further subclaims give advantageous developments again.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. Es zeigt

Fig. 1
eine erste Ausführungsform eines Schrupp-Schleif- Werkzeugs gemäß der Erfindung in einer Rück-Ansicht ge- mäß dem Sichtpfeil I in Fig. 3,
Fig. 2
eine Draufsicht auf die Schleifseite des Schrupp-Schleif- Werkzeugs gemäß dem Sichtpfeil II in Fig. 3,
Fig. 3
einen Querschnitt durch das Schrupp-Schleif-Werkzeug ge- mäß der Schnittlinie III-III in Fig. 1,
Fig. 4
einen Querschnitt durch eine zweite Ausführungsform eines Schrupp-Schleif-Werkzeugs gemäß der Erfindung,
Fig. 5
einen Querschnitt durch eine dritte Ausführungsform eines Schrupp-Schleif-Werkzeugs gemäß der Erfindung und
Fig. 6
eine Hand-Schleifmaschine mit einem Schrupp-Schleif- Werkzeug nach der Erfindung im Schleifeinsatz.
Further features, advantages and details of the invention will become apparent from the following description of exemplary embodiments with reference to the drawing. It shows
Fig. 1
a first embodiment of a roughing-grinding tool according to the invention in a rear view according to the viewing arrow I in Fig. 3 .
Fig. 2
a plan view of the grinding side of the roughing-grinding tool according to the viewing arrow II in Fig. 3 .
Fig. 3
a cross section through the roughing-grinding tool according to the section line III-III in Fig. 1 .
Fig. 4
a cross section through a second embodiment of a roughing-grinding tool according to the invention,
Fig. 5
a cross-section through a third embodiment of a roughing-grinding tool according to the invention and
Fig. 6
a hand grinder with a roughing-grinding tool according to the invention in the grinding insert.

Das in den Figuren 1 bis 3 dargestellte Schrupp-Schleif-Werkzeug weist einen in der üblichen Weise aus mit Phenolharz getränkten und verpressten Glasfasern bestehenden Tragteller 1 auf, der in üblicher Weise einen ebenen, ringförmigen Einspann-Bereich 2 aufweist, in dem eine ebenfalls kreisförmige Öffnung 3 zur Aufnahme einer Antriebswelle einer Antriebsmaschine ausgebildet ist. Der die Öffnung 3 umgebende ringförmige Einspann-Bereich 2 ist auf der einer Schleifseite 4 abgewandten Rückseite des Tragtellers 1 mit einem Metallring 5 versehen. An den Einspann-Bereich 2 schließt sich ein Kröpfungs-Bereich 6 an, der ebenfalls ringförmig ausgebildet ist und radial zur Achse 7 des Tragtellers 1 zur Schleifseite 4 hin ansteigt. An den Kröpfungs-Bereich 6 schließt sich ein ringförmiger Schleif-Bereich 8 an, der radial zur Achse 7 entgegen dem Kröpfungs-Bereich 6, und zwar radial zur Achse 7 nach außen von der Schleifseite 4 weg geneigt ist. Diese Ausgestaltung eines Tragtellers 1 ist allgemein bekannt und üblich.That in the FIGS. 1 to 3 illustrated roughing-grinding tool has a in the usual way from impregnated with phenolic resin and compressed glass fibers existing support plate 1, which has a flat, annular clamping area 2 in the usual way, in which a likewise circular opening 3 for receiving a drive shaft Drive machine is formed. The annular clamping region 2 surrounding the opening 3 is provided with a metal ring 5 on the rear side of the support plate 1 remote from a grinding side 4. The clamping area 2 is adjoined by a cranking area 6, which is likewise of annular design and rises radially to the axis 7 of the carrier plate 1 towards the grinding side 4. The cranking region 6 is adjoined by an annular grinding region 8, which is inclined radially outward from the grinding side 4, counter to the cranking region 6, radially to the axis 7. This embodiment of a support plate 1 is well known and common.

Auf der Schleifseite 4 ist eine Fiber-Schleifscheibe 9 befestigt. Hierbei handelt es sich um ein sogenanntes Schleifmittel auf Unterlage, das aus einer Fiber-Scheibe 10 als Träger bzw. Unterlage und einem harzgebundenen Schleifmittel-Belag 11 besteht. Die Fiber-Scheibe 10 besteht aus Vulkanfiber, wobei es sich um ein gebundenes, verpresstes Material auf der Basis von Baumwollfasern handelt. Der Schleifmittel-Belag 11 wird durch Ceramic-Korn 11.1 gebildet, das aus einem Mikrogranulat durch Sintern hergestellt wird. Die Mikrogranulate brechen einzeln aus dem jeweiligen Korn heraus, so dass dadurch die Standfestigkeit des Ceramic-Korns 11.1 im Vergleich zu üblichen Schleifmitteln erheblich gesteigert wird. Der harzgebundene Schleifmittel-Belag 11 ist in der üblichen Weise mit der Fiber-Scheibe 10 verbunden. Die Fiber-Scheibe 10 der Fiber-Schleifscheibe 9 ist mit der Schleifseite 4 des Tragtellers 1 mittels einer Klebstoff-Schicht 12 verbunden.On the grinding side 4, a fiber grinding wheel 9 is attached. This is a so-called abrasive on a base, which consists of a fiber disk 10 as a support or base and a resin-bonded abrasive coating 11. The fiber disk 10 is made of vulcanized fiber, which is a bound, pressed material based on cotton fibers. The abrasive coating 11 is formed by ceramic grain 11.1, which is produced from a microgranulate by sintering. The microgranules break individually from the respective grain, so that thereby the stability of the ceramic grain 11.1 is significantly increased compared to conventional abrasives. The resin bonded abrasive pad 11 is bonded to the fiber disk 10 in the usual manner. The fiber disk 10 of the fiber grinding wheel 9 is connected to the grinding side 4 of the support plate 1 by means of an adhesive layer 12.

Der Radius R1 des Tragtellers 1 ist - wie Figur 1 entnehmbar ist - etwas kleiner als der Radius R9 der Fiber-Schleifscheibe 9, ohne dass die Fiber-Schleifscheibe 9 radial zur Achse 7 über den Außenrand 13 des Tragtellers 1 vorsteht. Der Kröpfungs-Bereich 6 weist am Übergang zum Haupt-Schleif-Bereich 8 einen Radius R6 von der Achse 7 auf. Der Haupt-Schleif-Bereich 8 weist einen Radius R8 von der Achse 7 auf, der gleich dem Radius R9 der Fiber-Schleif-Scheibe 9 ist. Für die Radien R6 und R8 in Bezug auf den Radius R9 gilt folgendes: 0 , 45 R 9 R 6 0 , 7 R 9

Figure imgb0001
R 9 = R 8
Figure imgb0002
The radius R1 of the support plate 1 is - like FIG. 1 can be removed - slightly smaller than the radius R9 of the fiber grinding wheel 9, without the fiber grinding wheel 9 projecting radially to the axis 7 on the outer edge 13 of the support plate 1. The cranking region 6 has a radius R6 from the axis 7 at the transition to the main grinding region 8. The main grinding portion 8 has a radius R8 from the axis 7 which is equal to the radius R9 of the fiber grinding disc 9. For the radii R6 and R8 with respect to the radius R9, the following applies: 0 . 45 R 9 R 6 0 . 7 R 9
Figure imgb0001
R 9 = R 8th
Figure imgb0002

Der Einsatz des Schleif-Werkzeugs erfolgt in der üblichen Weise unter einem Winkel zur Achse 7.The use of the grinding tool takes place in the usual manner at an angle to the axis 7.

Soweit bei der zweiten Ausführungsform nach Figur 4 gleiche oder ähnliche Teile oder Bereiche vorhanden sind, wie bei der Ausführungsform nach den Figuren 1 bis 3, werden die gleichen Bezugsziffern mit einem hochgesetzten Strich verwendet. Der Tragteller 1' besteht aus einem mit Epoxydharz getränkten Glasgewebe. Er besitzt - wie bei dem Ausführungsbeispiel nach den Figuren 1 bis 3 - eine konstante Dicke h. Der ebene ringförmige Einspann-Bereich 2' ist ebenfalls mit einer kreisförmigen Öffnung 3' zur Aufnahme einer Antriebswelle einer Antriebsmaschine ausgebildet. Der die Öffnung 3' umgebende ringförmige Einspann-Bereich 2' ist in diesem Ausführungsbeispiel nicht mit einem Metallring verstärkt. Der sich an den Einspann-Bereich 2' anschließende Kröpfungs-Bereich 6' ist ebenfalls ringförmig ausgebildet und steigt radial zur Achse 7' des Tragtellers 1' zur Schleifseite 4' hin an. Der ebene Einspann-Bereich 2' geht mit einem Krümmungsradius r2' in den Kröpfungs-Bereich 6' über. An den Kröpfungs-Bereich 6' schließt sich wiederum ein ringförmiger Haupt-Schleif-Bereich 8' an, der radial zur Achse 7' entgegen dem Kröpfungs-Bereich 6', und zwar radial zur Achse 7' nach außen von der Schleifseite 4' weg geneigt ist. Von der Achse 7' nach außen gesehen ist der Schleif-Bereich 8' also von der Schleifseite 4' weg geneigt. Auch bei der Ausgestaltung nach Figur 4 ist auf der Schleifseite 4' des Tragtellers 1' eine Fiber-Schleifscheibe 9' befestigt. Es handelt sich auch hier um ein sogenanntes Schleifmittel auf Unterlage, das aus einer Fiber-Scheibe 10' als Träger bzw. Unterlage und einem harzgebundenen Schleifmittel-Belag 11' besteht. Die Fiber-Schleifscheibe 9' ist also eine an sich eigenständige Schleifscheibe, die eingesetzt werden könnte, wie es oben zum Stand der Technik nach der EP 1 741 515 B1 beschrieben worden ist. Sie ist flexibel, also biegsam. Der Aufbau der Fiber-Schleifscheibe 9' entspricht dem oben zu den Figuren 1 bis 3 bereits Beschriebenen. Der Schleifmittel-Belag 11' weist also Ceramic-Korn 11.1' auf. Auch bei der Ausführung nach Figur 4 ist die Fiber-Scheibe 10' der Fiber-Schleifscheibe 9' mit dem Tragteller 1' mittels einer Klebstoff-Schicht 12' verbunden.As far as in the second embodiment according to FIG. 4 the same or similar parts or regions are present as in the embodiment according to the FIGS. 1 to 3 , the same reference numbers are used with a prime. The support plate 1 'consists of a glass cloth impregnated with epoxy resin. He has - as in the embodiment of the FIGS. 1 to 3 - a constant thickness h. The planar annular clamping area 2 'is likewise formed with a circular opening 3' for receiving a drive shaft of a drive machine. The annular clamping region 2 'surrounding the opening 3' is not reinforced with a metal ring in this exemplary embodiment. The curvature region 6 'adjoining the clamping region 2' is likewise of annular design and rises radially to the axis 7 'of the carrier plate 1' towards the grinding side 4 '. The planar clamping region 2 'merges with a radius of curvature r2' in the cranking region 6 '. The cranking region 6 'is adjoined in turn by an annular main grinding region 8', which extends radially to the axis 7 'against the cranking region 6', namely radially to the axis 7 'outwardly from the grinding side 4' is inclined. Seen from the axis 7 'to the outside of the grinding area 8' so from the grinding side 4 'inclined away. Also in the design FIG. 4 is on the grinding side 4 'of the support plate 1' a fiber grinding disc 9 'attached. This is also a so-called abrasive on a base, which consists of a fiber disk 10 'as a support or base and a resin-bonded abrasive coating 11'. The fiber grinding wheel 9 'is thus a self-contained grinding wheel, which could be used, as described above for the prior art according to EP 1 741 515 B1 has been described. It is flexible, so flexible. The structure of the fiber grinding wheel 9 'corresponds to the above to the FIGS. 1 to 3 already described. The abrasive coating 11 'thus has ceramic grain 11.1'. Also in the execution after FIG. 4 is the fiber slice 10 'of the fiber abrasive disc 9' connected to the support plate 1 'by means of an adhesive layer 12'.

Wie Figur 4 entnehmbar ist, geht der Kröpfungs-Bereich 6' in den Schleif-Bereich 8' mit einem Krümmungsradius r6' über. Der Haupt-Schleif-Bereich 8' selber ist ebenfalls gekrümmt, und zwar leicht konvex zur Schleifseite 4' mit einem Krümmungsradius r8'.As FIG. 4 can be removed, the cranking region 6 'is in the grinding area 8' with a radius of curvature r6 'on. The main grinding area 8 'itself is also curved, slightly convex to the grinding side 4' with a radius of curvature r8 '.

Der sich an den Haupt-Schleif-Bereich 8' anschließende Außen-Schleif-Bereich 15' ist radial nach außen gesehen von der Schleifseite 4' hin weg geneigt und zur Schleifseite 4' mit einem Krümmungsradius r15' konvex gekrümmt.The outer grinding area 15 'adjoining the main grinding area 8' is inclined radially outward away from the grinding side 4 'and convexly curved toward the grinding side 4' with a radius of curvature r15 '.

Die Krümmungen mit den Krümmungsradien r6', r8' und r15' sind konvex zur Schleifseite 4' ausgebildet; der Grund hierfür liegt darin, dass der Einsatz des Schrupp-Schleif-Werkzeugs in der üblichen Weise unter einem Winkel zur Achse 7' erfolgt. Die Fiber-Scheibe 10' endet - wie Figur 4 entnehmbar ist - bündig mit dem Außenrand 13' des Tragtellers 1'. Für die Krümmungsradien r2', r6', r8' und r15' gelten folgende Beziehungen:

  • 15 mm ≤ r2' ≤ 30 mm und bevorzugt 20 mm ≤ r2' ≤ 25 mm
  • 15 mm ≤ r6' ≤ 40 mm und bevorzugt 15 mm ≤ r6' ≤ 20 mm
  • 190 mm ≤ r8' ≤ 300 mm und bevorzugt 200 mm ≤ r8' ≤ 250 mm
  • 17 mm ≤ r15' ≤ 40 mm und bevorzugt 15 mm ≤ r15' ≤ 20 mm
The curvatures with the radii of curvature r6 ', r8' and r15 'are formed convex to the grinding side 4'; the reason for this is that the use of the roughing and grinding tool takes place in the usual way at an angle to the axis 7 '. The fiber disc 10 'ends - as FIG. 4 is removable - flush with the outer edge 13 'of the support plate 1'. The following relationships apply for the radii of curvature r2 ', r6', r8 'and r15':
  • 15 mm ≤ r2 '≤ 30 mm and preferably 20 mm ≤ r2' ≤ 25 mm
  • 15 mm ≤ r6 '≤ 40 mm and preferably 15 mm ≤ r6' ≤ 20 mm
  • 190 mm ≤ r8 '≤ 300 mm and preferably 200 mm ≤ r8' ≤ 250 mm
  • 17 mm ≤ r15 '≤ 40 mm and preferably 15 mm ≤ r15' ≤ 20 mm

Die Fiber-Schleif-Scheibe 9' weist einen Radius R9' von der Achse 7' auf. Der Kröpfungs-Bereich 6' weist am Übergang zum Haupt-Schleif-Bereich 8' einen Radius R6' von der Achse 7' auf. Der Haupt-Schleif-Bereich 8' weist einen Radius R8' von der Achse 7' auf, der nur dann gleich dem Radius R9' der Fiber-Schleif-Scheibe 9' ist, wenn kein gesonderter stärker gekrümmter Außen-Schleif-Bereich 15' vorhanden ist. Für die Radien R6' und R8' in Bezug auf den Radius R9' gilt Folgendes: 0 , 45 R 9 ʹ R 6 ʹ 0 , 7 R 9 ʹ

Figure imgb0003
0 , 75 R 9 ʹ R 8 ʹ R 9 ʹ
Figure imgb0004
The fiber abrasive disc 9 'has a radius R9' from the axis 7 '. The offset area 6 'has a radius R6' from the axis 7 'at the transition to the main grinding area 8'. The main grinding area 8 'has a radius R8' from the axis 7 'which is equal to the radius only R9 'of the fiber abrasive disc 9' is when there is no separate more curved outer abrasive region 15 '. For the radii R6 'and R8' with respect to the radius R9 ', the following applies: 0 . 45 R 9 ' R 6 ' 0 . 7 R 9 '
Figure imgb0003
0 . 75 R 9 ' R 8th ' R 9 '
Figure imgb0004

Das Ausführungsbeispiel nach Figur 5 unterscheidet sich von dem nach Figur 4 dadurch, dass der Tragteller 1" eine radial nach außen zunehmende Elastizität, also eine geringere Steifigkeit bzw. größere Nachgiebigkeit, aufweist. Alle mit Figur 4 übereinstimmenden Teile bzw. Bereiche werden daher mit den gleichen Bezugszeichen und alle ähnlichen Teile oder Bereiche jeweils mit denselben Bezugszeichen bezeichnet, wie sie zur Figur 4 verwendet worden sind, ergänzt um einen hochgesetzten Doppelstrich, ohne dass es einer erneuten Beschreibung bedürfte.The embodiment according to FIG. 5 is different from that FIG. 4 in that the support plate 1 "has a radially outwardly increasing elasticity, that is to say a lower rigidity or greater flexibility FIG. 4 Matching parts or areas are therefore designated by the same reference numerals and all similar parts or areas with the same reference numerals as to FIG. 4 have been used, supplemented by a double-dashed line, without requiring a new description.

Die zunehmende Elastizität des Tragtellers 1" in Richtung zum Außenrand 13" wird dadurch erreicht, dass der Tragteller 1" mehrere jeweils ringförmige Abschnitte 16, 17 bzw. 18 aufweist, die eine unterschiedliche, radial nach außen abnehmende Dicke aufweisen. Im Ausführungsbeispiel nach Figur 5 erstreckt sich der Abschnitt 16 etwa bis zum Übergang vom Kröpfungs-Bereich 6' in den Haupt-Schleif-Bereich 8"; er hat hier die Dicke h. Der sich radial nach außen daran anschließende ringförmige Abschnitt 17 erstreckt sich radial bis vor den Außen-Schleif-Bereich 15". Der Abschnitt 17 weist eine Dicke h' auf; der äußere Abschnitt 18 weist eine Dicke h" auf, wobei gilt h > h' > h". Grundsätzlich ist bei einer abgestuften Ausgestaltung entsprechend Figur 5 davon auszugehen, dass mindestens zwei derartige Abschnitte und höchstens fünf derartige Abschnitte vorgesehen sind. Für die Radien R6', R8" und R9' gelten die obigen Beziehungen.The increasing elasticity of the support plate 1 "in the direction of the outer edge 13" is achieved in that the support plate 1 "has a plurality of respectively annular sections 16, 17 and 18, which have a different, radially outwardly decreasing thickness FIG. 5 the section 16 extends approximately as far as the transition from the cranking area 6 'into the main grinding area 8 ", here it has the thickness h, the annular section 17 extending radially outward extending radially to the outside. Grinding range 15 ". The portion 17 has a thickness h '; the outer portion 18 has a thickness h ", where h> h '>h". Basically, according to a graduated embodiment FIG. 5 assume that there are at least two such sections and no more than five such sections are. For the radii R6 ', R8 "and R9', the above relationships apply.

Aus Figur 6 geht der Einsatz des erfindungsgemäßen Schrupp-Schleif-Werkzeugs an Hand-Schleifmaschinen 19 hervor. Das Schrupp-Schleif-Werkzeug wird auf einer Abtriebswelle 20 der Hand-Schleifmaschine 19 aufgesteckt, die durch die Öffnung 3 des Schleif-Werkzeugs hindurch gesteckt wird, sodass die Achse 7 mit der Mittel-Achse der Abtriebswelle 20 zusammenfällt. Die Befestigung des Schleif-Werkzeugs auf der Abtriebswelle 20 erfolgt mittels einer Spann-Mutter 21.Out FIG. 6 the use of the roughing-grinding tool according to the invention on manual grinding machines 19 emerges. The roughing-grinding tool is mounted on an output shaft 20 of the hand grinder 19, which is inserted through the opening 3 of the grinding tool, so that the axis 7 coincides with the central axis of the output shaft 20. The attachment of the grinding tool on the output shaft 20 by means of a clamping nut 21st

Durch die konvexe Wölbung des Haupt-Schleif-Bereichs 8" zur Schleifseite 4' hin wird erreicht, dass beim Flächenschleifen von Werkstücken 22, also beim Haupteinsatzgebiet derartiger Schleif-Werkzeuge, auch bei den unvermeidbaren Pendelbewegungen des Schleif-Werkzeugs eine gleichmäßige Belastung des Schleifmittel-Belages 11' eintritt, also keine extremen Flächenpressungen auftreten. Dies führt bei diesen stets an Hand-Schleifmaschinen eingesetzten Schrupp-Schleif-Werkzeugen zu einem geringeren Verschleiß und damit einer höheren Standzeit bzw. einer höheren Abtrags-Leistung der Schleifscheibe. Dieser vorteilhafte Effekt wird noch verstärkt durch die nach außen hin zunehmende Elastizität des Schleif-Werkzeugs gemäß Figur 5.Due to the convex curvature of the main grinding area 8 "towards the grinding side 4 ', it is achieved that during surface grinding of workpieces 22, ie in the main field of application of such grinding tools, even in the case of the unavoidable pendulum movements of the grinding tool, a uniform loading of the abrasive This results in less wear and tear on these grinding / grinding tools, which are always used on hand-held grinders, resulting in a longer service life and a higher removal rate of the grinding wheel reinforced by the outwardly increasing elasticity of the grinding tool according to FIG. 5 ,

Die stärkere Wölbung im Außen-Schleif-Bereich 15' bzw. 15" bewirkt, dass bei einem Anstoßen des Außenrandes 13' bzw. 13" der Schleifscheibe an einen Gegenstand keine Ablösung der Fiber-Schleifscheibe 9' samt Schleifmittel-Belag 11 vom Tragteller 1' bzw. 1" erfolgt.The stronger curvature in the outer grinding area 15 'or 15 "causes when abutting the outer edge 13' or 13" of the grinding wheel to an object no detachment of the fiber grinding wheel 9 'together with abrasive coating 11 from the support plate. 1 'or 1 "takes place.

Claims (13)

Schrupp-Schleif-Werkzeug - mit einem Tragteller (1, 1', 1"), der - - konzentrisch zu einer Mittel-Längs-Achse (7, 7') ausgebildet ist und - - eine mittlere Öffnung (3, 3') zur Aufnahme einer Antriebswelle einer Antriebsmaschine aufweist, und - mit einer Fiber-Schleifscheibe (9, 9', 9"), die - - aus einer Fiber-Scheibe (10, 10'), mit einem harzgebundenen Schleifmittel-Belag (11, 11') gebildet ist, - - einen radial zur Mittel-Längs-Achse (7, 7') angeordneten, äußeren ringförmigen Schleif-Bereich (8, 8', 8") aufweist, - - sich auf dem Tragteller (1, 1', 1") abstützt und - - eine Schleifseite (4, 4') aufweist, dadurch gekennzeichnet,
dass die Fiber-Schleifscheibe (9, 9', 9")
auf den Tragteller (1, 1', 1") aufgeklebt ist.
Rough grinding tool - With a support plate (1, 1 ', 1 "), the - - Concentric to a central longitudinal axis (7, 7 ') is formed and - - Has a central opening (3, 3 ') for receiving a drive shaft of a drive machine, and - with a fiber grinding wheel (9, 9 ', 9 "), the - - is formed from a fiber disc (10, 10 '), with a resin-bonded abrasive coating (11, 11'), - - a radially to the central longitudinal axis (7, 7 ') arranged, outer annular grinding area (8, 8', 8 "), - - on the support plate (1, 1 ', 1 ") is supported and - - has a grinding side (4, 4 '), characterized,
that the fiber grinding wheel (9, 9 ', 9 ")
is glued to the support plate (1, 1 ', 1 ").
Schrupp-Schleif-Werkzeug nach Anspruch 1, dadurch gekennzeichnet,
dass die Fiber-Schleifscheibe (9, 9', 9") mittels einer Klebstoff-Schicht (12, 12') auf den Tragteller (1, 1', 1") aufgeklebt ist.
Rough grinding tool according to claim 1, characterized in that
that the fiber grinding disc (9, 9 ', 9 ") by means of an adhesive layer (12, 12') on the support plate (1, 1 ', 1") is glued.
Schrupp-Schleif-Werkzeug nach Anspruch 1 oder 2, gekennzeichnet durch Ceramic-Korn (11.1, 11.1') als Schleifmittel.Rough grinding tool according to claim 1 or 2, characterized by ceramic grain (11.1, 11.1 ') as an abrasive. Schrupp-Schleif-Werkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,
dass der Schleif-Bereich (8', 8") zur Schleifseite (4') hin konvex mit einem Krümmungsradius r8' ausgebildet ist.
Rough grinding tool according to one of claims 1 to 3, characterized
in that the grinding area (8 ', 8 ") is designed to be convex with a radius of curvature r8' towards the grinding side (4 ').
Schrupp-Schleif-Werkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet,
dass der Schleif-Bereich einen Haupt-Schleif-Bereich (8', 8") und einen sich radial zur Achse (7') nach außen anschließenden Außen-Schleif-Bereich (15', 15") aufweist, der zur Schleifseite (4') hin konvex mit einem Krümmungsradius r15' ausgebildet ist.
Rough grinding tool according to one of claims 1 to 4, characterized
in that the grinding area has a main grinding area (8 ', 8 ") and an outer grinding area (15', 15") which adjoins the axis (7 ') outwards radially and which faces the grinding side (4 ') is convexly formed with a radius of curvature r15'.
Schrupp-Schleif-Werkzeug nach Anspruch 4 und 5, dadurch gekennzeichnet,
dass für den Krümmungsradius r15' in Bezug auf den Krümmungsradius r8' gilt: r15'<r8'.
Rough grinding tool according to claim 4 and 5, characterized
that applies to the radius of curvature r15 'in relation to the radius of curvature r8': r15 '' r8 '.
Schrupp-Schleif-Werkzeug nach Anspruch 4, dadurch gekennzeichnet,
dass für den Krümmungsradius r8' gilt: 190 mm ≤ r8' ≤ 300 mm und bevorzugt 200 mm ≤ r8' ≤ 250 mm.
Rough grinding tool according to claim 4, characterized in that
that 'applies: 190 mm ≤ r8' for the radius of curvature r8 ≤ 300 mm and preferably 200 mm ≤ r8 '≤ 250 mm.
Schrupp-Schleif-Werkzeug nach Anspruch 5, dadurch gekennzeichnet,
dass für den Krümmungsradius r15' gilt: 17 mm ≤ r15' ≤ 40 mm und bevorzugt 15 mm ≤ r15' ≤ 20 mm.
Rough grinding tool according to claim 5, characterized in that
that 'is true: 17 mm ≤ r15' for the radius of curvature r15 ≤ 40 mm and preferably 15 mm ≤ r15 '≤ 20 mm.
Schrupp-Schleif-Werkzeug nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet,
dass der Schleif-Bereich (8', 8") einen Innen-Radius R6' und einen Außen-Radius R8' und die Fiber-Schleif-Scheibe (9') einen Außen-Radius R9' aufweist, wobei gilt: 0 , 45 R 9 ʹ R 6 ʹ 0 , 7 R 9 ʹ
Figure imgb0005

und 0 , 75 R 9 ʹ R 8 ʹ R 9 ʹ
Figure imgb0006
Rough grinding tool according to one of claims 1 to 8, characterized
in that the grinding region (8 ', 8 ") has an inner radius R6' and an outer radius R8 'and the fiber-abrasive disc (9') has an outer radius R9 ', where: 0 . 45 R 9 ' R 6 ' 0 . 7 R 9 '
Figure imgb0005

and 0 . 75 R 9 ' R 8th ' R 9 '
Figure imgb0006
Schrupp-Schleif-Werkzeug nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet,
dass der Tragteller (1") radial zur Achse (7') eine nach außen zunehmende Elastizität aufweist.
Rough grinding tool according to one of claims 1 to 9, characterized
that the supporting plate (1 ") radially to the axis (7 ') has an outwardly increasing elasticity.
Schrupp-Schleif-Werkzeug nach Anspruch 10, dadurch gekennzeichnet,
dass die Elastizität radial nach außen stufenweise zunimmt.
Rough grinding tool according to claim 10, characterized in that
that the elasticity gradually increases radially outward.
Schrupp-Schleif-Werkzeug nach Anspruch 11, dadurch gekennzeichnet,
dass der Tragteller (1") mehrere ringförmige Abschnitte (16, 17, 18) aufweist, die jeweils eine radial zur Achse (7') nach außen abnehmende Dicke h, h', h" aufweisen.
Rough grinding tool according to claim 11, characterized in that
in that the support plate (1 ") has a plurality of annular sections (16, 17, 18) each having a thickness h, h ', h" which decreases radially outwards relative to the axis (7').
Schrupp-Schleif-Werkzeug nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet,
dass die Fiber-Scheibe (10, 10') aus Vulkanfiber besteht.
Rough grinding tool according to one of claims 1 to 12, characterized
that the fiber disc (10, 10 ') is made of vulcanized fiber.
EP10167695.5A 2009-08-22 2010-06-29 Scrubbing-grinding tool Not-in-force EP2286959B1 (en)

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DE201010029553 DE102010029553A1 (en) 2010-06-01 2010-06-01 Rough grinding tool for use on hand grinding machine, has fiber grinding disk with outer annular grinding region that is arranged radial to centre longitudinal axis, where disk is supported or glued to support plate using adhesive layer

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CN101992429B (en) 2015-04-08
CN101992429A (en) 2011-03-30
EP2286959B1 (en) 2014-05-07
CA2715530A1 (en) 2011-02-22
AU2010212470A1 (en) 2011-03-10
ZA201005883B (en) 2013-08-28
BRPI1003157A2 (en) 2012-04-10
RU2010132291A (en) 2012-02-10
EP2286959A3 (en) 2011-03-16
US20110045750A1 (en) 2011-02-24

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