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EP1543923A1 - Roughing disc - Google Patents

Roughing disc Download PDF

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Publication number
EP1543923A1
EP1543923A1 EP04027627A EP04027627A EP1543923A1 EP 1543923 A1 EP1543923 A1 EP 1543923A1 EP 04027627 A EP04027627 A EP 04027627A EP 04027627 A EP04027627 A EP 04027627A EP 1543923 A1 EP1543923 A1 EP 1543923A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
layers
wheel according
separating layer
roughing
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
EP04027627A
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German (de)
French (fr)
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EP1543923B1 (en
Inventor
Martin Wördehoff
Claus Genau
Theo Schneider
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
Application filed by August Rueggeberg GmbH and Co KG filed Critical August Rueggeberg GmbH and Co KG
Priority to PL04027627T priority Critical patent/PL1543923T3/en
Publication of EP1543923A1 publication Critical patent/EP1543923A1/en
Application granted granted Critical
Publication of EP1543923B1 publication Critical patent/EP1543923B1/en
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    • 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
    • B24D7/00—Bonded 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
    • B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives

Definitions

  • the invention relates to a roughing grinding wheel according to the preamble of claim 1.
  • a relatively thick circumferential grinding wheel is known made of several fabric-reinforced, glued individual discs consists, wherein in the adhesive layer, an elastic insert can be provided. Such slices have a higher grinding performance as an integrally assembled compact disc.
  • From the CH-PS 434 023 is also a compact disk known in their radially outer regions each having abrasive-free zones, the annular spacers are formed, which optionally removed again can be so that a clear gap between the neighboring Areas is formed.
  • the invention is based on the object, a roughing grinding wheel of the generic type in such a way that when used under forces, which attack substantially in the direction of the center axis on the grinding wheel, the vibrations are significantly reduced.
  • the grinding wheel has within range the at least one annular separating layer has a compact Structure and only in the range of at least one separation layer a two or multi-layered construction.
  • the separation layer has primarily the function, to reduce the amplitude of vibration during grinding. It does not work Primarily as a cushioning layer, but makes the grinding wheel in this Area softer without affecting the structure of the binder bound Whole grain abrasive must be softened. The abrasion itself is therefore not enlarged.
  • the claims 2 and 3 give particularly advantageous embodiments of at least one release layer.
  • Claim 4 indicates a preferred thickness range of each release layer.
  • Claim 6 indicates, where advantageously the separating layer is arranged, if only one release layer is present.
  • Claims 7 and 8 give preferred ranges of outside diameter and the thickness of the grinding wheel.
  • the separation layer extends in the radial direction only over the working range of the grinding wheel, ie only on their ablixbaren during grinding area.
  • the use of the roughing wheel 1 is carried out on a machined Workpiece 8 in such a way that the grinding wheel 1 is not radially to its central axis 6, but essentially transversely thereto in the area of its External circumference 9 is loaded with a force P, so they accordingly is bent, as exaggerated in Fig. 1 for the attack area 10th the grinding wheel 1 is shown on the workpiece 8.
  • the angle a between the direction of attack of the force P and the center axis 6 is predominantly in the range of 20 to 60 °.
  • the grinding wheel 1 consists in its basic structure of abrasive grain 11, which is bound by means of a binder, usually phenolic resin. From Fig. 2 and 3, the basic structure of the roughing wheel results 1. Thereafter, the grinding wheel 1 on its underside 12 and on its upper side 13 each have a reinforcement 14 and 15, respectively, by a soaked with the binder of the abrasive grain 11 tissue , in particular a glass fabric, is formed, which is so soaked in the rule with phenolic resin. It is followed in each case inwardly to a layer 16 or 17 of abrasive grain 11 with binder, which in turn on their adjacent sides reinforcements 18, 19, which may be equal to the reinforcements 14, 15.
  • a binder usually phenolic resin.
  • the reinforcements 14, 15, 18, 19 and the layers 16, 17 are constructed so that they concentric to the central axis 6, the central opening 4 limit.
  • an annular separating layer 20 is arranged, which is formed in the present case of two adjacent intermediate layers 21, 22, which consist for example of paper, plastic film or the like.
  • this separating layer 20 does not extend to the outer circumference 9 of the grinding wheel 1, but has an outer diameter D 20 for which the following applies in relation to the outer diameter D 1 of the grinding wheel 1: 0.97 ⁇ D 20 / D 1 ⁇ 0,99.
  • the outer diameter D 1 of the grinding wheel 1 is in the range of 100 to 300 mm.
  • the separating layer 20 extends over the working region 23 of the grinding wheel 1, ie radially to the axis 6 inwardly over a range which can be consumed during use, for example in accordance with FIG.
  • This work area 23 extends over 60 to 100 percent of the flat area 24 of the grinding wheel when viewed from the outer circumference 9, the flat area 24 being located radially outside the inner clamping area 26 offset by a crank 25.
  • the grinding wheel 1 can on its outer sides nor a lower paper cover 27 and an upper paper cover 28, wherein the upper paper cover 28 usually formed at the same time as a label is.
  • the centering ring 5 is placed from above.
  • the grinding wheel 1 is formed in a compressed state so that the bonded abrasive grain 11 also passes through the inner reinforcements 18, 19, although in the production according to FIG. 2, the inner reinforcements 18, 19 and the release layer 20 directly be placed over each other.
  • the bonded abrasive grain is also located in the small radially outer region 29 outside of the release layer 20.
  • the reason why the release layer 20 does not generally extend beyond the full outer diameter D 1 and consequently is formed radially outward of the bonded abrasive grain filled region 29 lies primarily in manufacturing reasons. A certain tolerance compensation in the production makes this necessary.
  • the bonded abrasive grain of this area 29 is abraded, so that then the release layer 20 is exposed.
  • d 20 of the separating layer 20 in comparison with the outer diameter D 1 of the grinding wheel 1, 0.2 ⁇ d 20 / D 1 ⁇ 0.65.
  • each separating layer 20 may also be present be, which are arranged symmetrically about the thickness c. Also In this case, each separating layer 20 is bounded on both sides by a reinforcement 18, 19. The same applies to the embodiment of FIG. 5, where three Separating layers 20 are provided.
  • a separating layer 20 ' can not only consist of two intermediate layers 21, 22, but as shown in Fig. 6 from only a relatively thick intermediate layer 30 exist, which consists of a material that occurs when caused by the described bend in the attack area 10 about shear directed radially to the axis 6 shearing forces in and thereby practically dissolved in two intermediate layers.
  • Such properties for example, have cardboard or paper.
  • the only one intermediate layer 30 made of a material, for example a suitable plastic, which, with the binder, in So usually phenolic resin, only a small bond is received, so that at the described bending load, the intermediate layer 30 from the abrasive grain 11th or the reinforcement 18 or 19 breaks off. Otherwise, the structure of a such grinding wheel 1 'as already described.
  • the radially outer area is first 29 processed. If the separating layer 20 or 20 'on the outer circumference 9 is exposed, then leads the described embodiment of the separation layer or separation layers 20 or 20 'cause the grinding wheel 1 or 1' the behavior of several packetized grinding wheels has, but the strength and stability of the grinding wheel as a compact grinding wheel within the separating layer 20 in the region of the crank 25 and in Clamping area 26 is maintained. The through the radial extent of the Separating layer 20 or 20 'defined working areas 23 of the grinding wheel 1, 1 'can move radially against each other and thus among the Dodge resilient axial forces.

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

Abstract

The grinding disc has at least two layers (16, 17) of bonded grinding particles (11) each strengthened on each side towards the centre axis (6) by reinforcements (19, 14,18). Between the adjoining layers is an annular dividing layer (20) extending up close to the outer circumference (9) and having an outer diameter , inner diameter and thickness which separates the adjoining layers from each other but supports same relative to each other towards the centre axis. The dividing layer can itself consists of two adjoining intermediate layers.

Description

Die Erfindung betrifft eine Schrupp-Schleifscheibe nach dem Oberbegriff des Anspruches 1.The invention relates to a roughing grinding wheel according to the preamble of claim 1.

Bei derartigen bekannten Schrupp-Schleifscheiben, deren Durchmesser um mindestens den Faktor 10 größer ist als ihre Dicke, treten beim Einsatz an handgeführten Winkel-Schleifmaschinen im Schleifeinsatz starke Vibrationen auf, die erhebliche körperliche Schäden des Hand-Arm-Systems verursachen können. Zur Beseitigung dieses Nachteils wurden bereits vibrations- und geräuschärmere Schrupp-Schleifscheiben entwickelt, die aber andere Nachteile, wie unangenehme Geruchsentwicklung beim Schleifprozess und/oder geringere Schleifleistung aufwiesen.In such known roughing grinding wheels whose diameter to at least the factor 10 is greater than its thickness, occur during use hand-held angle grinders in the grinding insert strong vibrations which cause considerable physical damage to the hand-arm system can. To eliminate this disadvantage, vibration and quieter roughing wheels, but others Disadvantages, such as unpleasant odor during the grinding process and / or lower grinding performance.

Aus der CH-PS 434 023 ist eine relativ dicke Umfangs-Schleifscheibe bekannt, die aus mehreren gewebeverstärkten, miteinander verklebten Einzelscheiben besteht, wobei in der Klebemittelschicht eine elastische Einlage vorgesehen sein kann. Solche Paketscheiben haben eine höhere Schleifleistung als eine einstückig zusammengesetzte Kompaktscheibe. Aus der CH-PS 434 023 ist darüber hinaus eine Kompaktscheibe bekannt, die in ihren radial äußeren Bereichen jeweils schleifmittelfreie Zonen aufweist, die von ringförmigen Zwischenlagen gebildet sind, die gegebenenfalls wieder entfernt werden können, so dass ein deutlicher Spalt zwischen den benachbarten Bereichen ausgebildet wird. Diese schleifmittelfreien Zonen führen beim Umfangsschleifen zu einem besonders kühlen Schliff und erzeugen außerdem noch weiteren Spanraum, der eine wesentlich Erhöhung der Abschliffleistung bei sonst gleicher Scheibenzusammensetzung ermöglicht. From CH-PS 434 023 a relatively thick circumferential grinding wheel is known made of several fabric-reinforced, glued individual discs consists, wherein in the adhesive layer, an elastic insert can be provided. Such slices have a higher grinding performance as an integrally assembled compact disc. From the CH-PS 434 023 is also a compact disk known in their radially outer regions each having abrasive-free zones, the annular spacers are formed, which optionally removed again can be so that a clear gap between the neighboring Areas is formed. These abrasive-free zones lead when peripheral grinding to a very cool cut and produce In addition, even more chip space, which significantly increases the Abschliffleistung with otherwise the same disc composition allows.

Der Erfindung liegt die Aufgabe zugrunde, eine Schrupp-Schleifscheibe der gattungsgemäßen Art so auszubilden, dass beim Einsatz unter Kräften, die wesentlich in Richtung der Mittel-Achse an der Schleifscheibe angreifen, die Vibrationen erheblich reduziert werden.The invention is based on the object, a roughing grinding wheel of the generic type in such a way that when used under forces, which attack substantially in the direction of the center axis on the grinding wheel, the vibrations are significantly reduced.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Die Schleifscheibe hat im Bereich innerhalb der mindestens einen ringförmigen Trennschicht einen kompakten Aufbau und nur im Bereich der mindestens einen Trennschicht einen zweioder mehrschichtigen Aufbau. Die Trennschicht hat primär die Funktion, die Amplitude der Vibration beim Schleifen zu reduzieren. Sie wirkt nicht primär als Dämpfungsschicht, sondern macht die Schleifscheibe in diesem Bereich weicher, ohne dass die Struktur des mittels Bindemittel gebundenen Schleifkorns insgesamt weicher gemacht werden muss. Der Abrieb selber wird also nicht vergrößert.This object is achieved by the features in the characterizing part of claim 1 solved. The grinding wheel has within range the at least one annular separating layer has a compact Structure and only in the range of at least one separation layer a two or multi-layered construction. The separation layer has primarily the function, to reduce the amplitude of vibration during grinding. It does not work Primarily as a cushioning layer, but makes the grinding wheel in this Area softer without affecting the structure of the binder bound Whole grain abrasive must be softened. The abrasion itself is therefore not enlarged.

Die Ansprüche 2 und 3 geben besonders vorteilhafte Ausgestaltungen der mindestens einen Trennschicht an.The claims 2 and 3 give particularly advantageous embodiments of at least one release layer.

Anspruch 4 gibt einen bevorzugten Dicken-Bereich jeder Trennschicht an.Claim 4 indicates a preferred thickness range of each release layer.

Nach Anspruch 5 sind vorteilhafterweise höchstens drei Trennschichten vorhanden.According to claim 5 are advantageously at most three separation layers available.

Anspruch 6 gibt an, wo vorteilhafterweise die Trennschicht angeordnet ist, wenn nur eine Trennschicht vorhanden ist.Claim 6 indicates, where advantageously the separating layer is arranged, if only one release layer is present.

Die Ansprüche 7 und 8 geben bevorzugte Bereiche des Außen-Durchmessers und der Dicke der Schleifscheibe an. Claims 7 and 8 give preferred ranges of outside diameter and the thickness of the grinding wheel.

Gemäß der Weiterbildung nach Anspruch 9 erstreckt sich die Trennschicht in radialer Richtung nur über den Arbeitsbereich der Schleifscheibe, also nur über deren beim Schleifeinsatz abarbeitbaren Bereich.According to the embodiment according to claim 9, the separation layer extends in the radial direction only over the working range of the grinding wheel, ie only on their abarbeitbaren during grinding area.

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

Fig. 1
eine Hand-Schleifmaschine mit einer Schrupp-Schleifscheibe nach der Erfindung im Schleifeinsatz,
Fig. 2
eine erfindungsgemäße Schrupp-Schleifscheibe in einer Seitenansicht in Explosionsdarstellung,
Fig. 3
eine Schleifscheibe nach Fig. 2 in Normal-Darstellung,
Fig. 4
einen Teilschnitt durch eine Schleifscheibe mit zwei Trennschichten,
Fig. 5
einen Teilschnitt durch eine Schleifscheibe mit drei Trennschichten und
Fig. 6
einen Teilschnitt durch eine Schleifscheibe mit einer Trennschicht aus nur einer Zwischenlage.
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 hand grinder with a roughing wheel according to the invention in the grinding insert,
Fig. 2
a roughing grinding wheel according to the invention in an exploded side view,
Fig. 3
a grinding wheel according to FIG. 2 in normal representation,
Fig. 4
a partial section through a grinding wheel with two separating layers,
Fig. 5
a partial section through a grinding wheel with three separating layers and
Fig. 6
a partial section through a grinding wheel with a release layer of only one intermediate layer.

Wie aus Fig. 1 hervorgeht, werden Schrupp-Schleifscheiben 1 an Hand-Schleifmaschinen 2, und zwar sogenannten Winkel-Schleifmaschinen, eingesetzt. Sie werden hierzu auf eine Abtriebswelle 3 der Schleifmaschine 2 aufgesteckt, die durch eine Mittel-Öffnung 4 mit einem Zentrier-Ring 5 der Schleifscheibe 1 hindurchgesteckt wird, so dass die Mittel-Achse 6 der Schleifscheibe 1 mit der entsprechenden Mittel-Achse der Abtriebswelle 3 zusammenfällt. Die Befestigung der Schleifscheibe 1 auf der Abtriebswelle 3 erfolgt mittels einer Spann-Mutter 7.As is apparent from Fig. 1, roughing wheels 1 are used on hand grinders 2, and so-called angle grinders used. You are doing this on an output shaft 3 of the grinding machine. 2 plugged through a central opening 4 with a centering ring 5 of the Grinding wheel 1 is inserted through, so that the central axis 6 of the Grinding wheel 1 with the corresponding center axis of the output shaft. 3 coincides. The attachment of the grinding wheel 1 on the output shaft 3 takes place by means of a clamping nut. 7

Der Einsatz der Schrupp-Schleifscheibe 1 erfolgt an einem zu bearbeitenden Werkstück 8 in der Weise, dass die Schleifscheibe 1 nicht radial zu ihrer Mittel-Achse 6, sondern im Wesentlichen quer hierzu im Bereich ihres Außenumfangs 9 mit einer Kraft P belastet wird, so dass sie entsprechend verbogen wird, wie in Fig. 1 übertrieben für den Angriffs-Bereich 10 der Schleifscheibe 1 am Werkstück 8 dargestellt ist. Der Winkel a zwischen der Angriffsrichtung der Kraft P und der Mittel-Achse 6 liegt überwiegend im Bereich von 20 bis 60°. Wie in Fig. 1 weiterhin dargestellt ist, kehrt die Schleifscheibe 1 jeweils nach Verlassen des Angriffs-Bereichs 10 in ihre normale Lage radial zur Mittel-Achse 6 zurück.The use of the roughing wheel 1 is carried out on a machined Workpiece 8 in such a way that the grinding wheel 1 is not radially to its central axis 6, but essentially transversely thereto in the area of its External circumference 9 is loaded with a force P, so they accordingly is bent, as exaggerated in Fig. 1 for the attack area 10th the grinding wheel 1 is shown on the workpiece 8. The angle a between the direction of attack of the force P and the center axis 6 is predominantly in the range of 20 to 60 °. As further illustrated in FIG. 1, returns the grinding wheel 1 each after leaving the attack area 10th in their normal position radially to the center axis 6 back.

Die Schleifscheibe 1 besteht in ihrem Grundaufbau aus Schleifkorn 11, das mittels eines Bindemittels, in der Regel Phenolharz, gebunden ist. Aus Fig. 2 und 3 ergibt sich der Grundaufbau der Schrupp-Schleifscheibe 1. Hiernach weist die Schleifscheibe 1 an ihrer Unterseite 12 und an ihrer Oberseite 13 je eine Armierung 14 bzw. 15 auf, die durch ein mit dem Bindemittel des Schleifkorns 11 getränktes Gewebe, insbesondere ein Glasgewebe, gebildet ist, das also im Regelfall mit Phenolharz getränkt ist. Es schließt sich jeweils nach innen eine Schicht 16 bzw. 17 aus Schleifkorn 11 mit Bindemittel an, die auf ihren einander benachbarten Seiten wiederum Armierungen 18, 19 aufweisen, die den Armierungen 14, 15 gleich sein können. Die Armierungen 14, 15, 18, 19 und die Schichten 16, 17 sind so aufgebaut, dass sie konzentrisch zu ihrer Mittel-Achse 6 die Mittel-Öffnung 4 begrenzen. Zwischen den beiden inneren Armierungen 18, 19 ist eine ringförmige Trennschicht 20 angeordnet, die im vorliegenden Fall aus zwei aneinander liegenden Zwischenlagen 21, 22 gebildet ist, die beispielsweise aus Papier, Kunststofffolie oder dergleichen bestehen. Diese Trennschicht 20 erstreckt sich in der Regel nicht bis zum Außenumfang 9 der Schleifscheibe 1, sondern hat einen Außen-Durchmesser D20, für den im Verhältnis zum Außen-Durchmesser D1 der Schleifscheibe 1 gilt: 0,97 ≤D20/D1 ≤0,99. Der Außen-Durchmesser D1 der Schleifscheibe 1 liegt im Bereich von 100 bis 300 mm. Nach innen erstreckt sich die Trennschicht 20 über den Arbeitsbereich 23 der Schleifscheibe 1, d. h. radial zur Achse 6 nach innen über einen Bereich, der beim Einsatz, beispielsweise gemäß Fig. 1, verbraucht werden kann. Dieser Arbeitsbereich 23 erstreckt sich - vom Außenumfang 9 her betrachtet - über 60 bis 100 Prozent des ebenen Bereichs 24 der Schleifscheibe, wobei der ebene Bereich 24 sich radial außerhalb des durch eine Kröpfung 25 abgesetzten inneren Einspann-Bereichs 26 befindet.The grinding wheel 1 consists in its basic structure of abrasive grain 11, which is bound by means of a binder, usually phenolic resin. From Fig. 2 and 3, the basic structure of the roughing wheel results 1. Thereafter, the grinding wheel 1 on its underside 12 and on its upper side 13 each have a reinforcement 14 and 15, respectively, by a soaked with the binder of the abrasive grain 11 tissue , in particular a glass fabric, is formed, which is so soaked in the rule with phenolic resin. It is followed in each case inwardly to a layer 16 or 17 of abrasive grain 11 with binder, which in turn on their adjacent sides reinforcements 18, 19, which may be equal to the reinforcements 14, 15. The reinforcements 14, 15, 18, 19 and the layers 16, 17 are constructed so that they concentric to the central axis 6, the central opening 4 limit. Between the two inner reinforcements 18, 19, an annular separating layer 20 is arranged, which is formed in the present case of two adjacent intermediate layers 21, 22, which consist for example of paper, plastic film or the like. As a rule, this separating layer 20 does not extend to the outer circumference 9 of the grinding wheel 1, but has an outer diameter D 20 for which the following applies in relation to the outer diameter D 1 of the grinding wheel 1: 0.97 ≦ D 20 / D 1 ≤0,99. The outer diameter D 1 of the grinding wheel 1 is in the range of 100 to 300 mm. Inwardly, the separating layer 20 extends over the working region 23 of the grinding wheel 1, ie radially to the axis 6 inwardly over a range which can be consumed during use, for example in accordance with FIG. This work area 23 extends over 60 to 100 percent of the flat area 24 of the grinding wheel when viewed from the outer circumference 9, the flat area 24 being located radially outside the inner clamping area 26 offset by a crank 25.

Die Schleifscheibe 1 kann auf ihren Außenseiten noch eine untere Papier-Abdeckung 27 und eine obere Papier-Abdeckung 28 aufweisen, wobei die obere Papier-Abdeckung 28 in der Regel gleichzeitig als Etikett ausgebildet ist. Der Zentrier-Ring 5 ist von oben aufgesetzt.The grinding wheel 1 can on its outer sides nor a lower paper cover 27 and an upper paper cover 28, wherein the upper paper cover 28 usually formed at the same time as a label is. The centering ring 5 is placed from above.

Wie aus Fig. 3 hervorgeht, ist die Schleifscheibe 1 in verpresstem Zustand so ausgebildet, dass das gebundene Schleifkorn 11 auch die inneren Armierungen 18, 19 durchsetzt, obwohl bei der Herstellung entsprechend Fig. 2 die inneren Armierungen 18, 19 und die Trennschicht 20 unmittelbar über einander gelegt werden. Das gebundene Schleifkorn befindet sich auch in dem kleinen radial äußeren Bereich 29 außerhalb der Trennschicht 20. Der Grund, warum die Trennschicht 20 sich in der Regel nicht über den vollen Außendurchmesser D1 erstreckt und demzufolge radial außen der mit gebundenem Schleifkorn gefüllte Bereich 29 ausgebildet ist, liegt primär in fertigungstechnischen Gründen. Ein gewisser Toleranzausgleich bei der Fertigung macht dies erforderlich. Zu Beginn eines Schleifvorganges wird das gebundene Schleifkorn dieses Bereiches 29 abgeschliffen, so dass dann die Trennschicht 20 freigelegt ist. Für den Innen-Durchmesser d20 der Trennschicht 20 gilt im Vergleich zu dem Außen-Durchmesser D1 der Schleifscheibe 1: 0,2 ≤d20/D1 ≤0,65.As is apparent from Fig. 3, the grinding wheel 1 is formed in a compressed state so that the bonded abrasive grain 11 also passes through the inner reinforcements 18, 19, although in the production according to FIG. 2, the inner reinforcements 18, 19 and the release layer 20 directly be placed over each other. The bonded abrasive grain is also located in the small radially outer region 29 outside of the release layer 20. The reason why the release layer 20 does not generally extend beyond the full outer diameter D 1 and consequently is formed radially outward of the bonded abrasive grain filled region 29 , lies primarily in manufacturing reasons. A certain tolerance compensation in the production makes this necessary. At the beginning of a grinding process, the bonded abrasive grain of this area 29 is abraded, so that then the release layer 20 is exposed. For the inner diameter d 20 of the separating layer 20, in comparison with the outer diameter D 1 of the grinding wheel 1, 0.2 ≦ d 20 / D 1 ≦ 0.65.

Wenn - wie in Fig. 3 dargestellt ist - nur eine Trennschicht 20 vorhanden ist, dann befindet diese sich im mittleren Dicken-Bereich der Schleifscheibe, wobei für den Abstand b der Trennschicht 20 von der Oberseite 13 der Schleifscheibe 1 im Verhältnis zur Gesamtdicke c der Schleifscheibe 1 gilt: 0,33 ≤b/c ≤0,66. Mit anderen Worten heißt dies, dass sich bei Vorhandensein nur einer Trennschicht 20 diese im mittleren Drittel der axialen Erstreckung der Schleifscheibe 1 befindet.If - as shown in Fig. 3 - only one release layer 20 is present is, then it is in the middle thickness range of the grinding wheel, wherein for the distance b of the separating layer 20 from the upper side 13 of the Grinding wheel 1 in relation to the total thickness c of the grinding wheel 1 is: 0.33 ≤b / c ≤0.66. In other words, this means that in presence only one separating layer 20 this in the middle third of the axial extent the grinding wheel 1 is located.

Wie sich aus Fig. 4 ergibt, können auch zwei Trennschichten 20 vorhanden sein, wobei diese über die Dicke c symmetrisch angeordnet sind. Auch hierbei ist jede Trennschicht 20 beidseitig von einer Armierung 18, 19 begrenzt. Entsprechendes gilt für die Ausgestaltung nach Fig. 5, wo drei Trennschichten 20 vorgesehen sind.As can be seen from FIG. 4, two separating layers 20 may also be present be, which are arranged symmetrically about the thickness c. Also In this case, each separating layer 20 is bounded on both sides by a reinforcement 18, 19. The same applies to the embodiment of FIG. 5, where three Separating layers 20 are provided.

Eine Trennschicht 20' kann auch nicht nur aus zwei Zwischenlagen 21, 22, sondern gemäß der Darstellung in Fig. 6 aus nur einer relativ dicken Zwischenlage 30 bestehen, die aus einem Material besteht, das bei Auftreten der durch die geschilderte Biegung im Angriffs-Bereich 10 hervorgerufenen etwa radial zur Achse 6 gerichteten Scherkräfte in sich zerreißt und dadurch praktisch in zwei Zwischenlagen aufgelöst wird. Derartige Eigenschaften haben beispielsweise Pappe oder Papier. Grundsätzlich ist es auch denkbar, dass die nur eine Zwischenlage 30 aus einem Material, beispielsweise einem geeignetem Kunststoff, besteht, der mit dem Bindemittel, in der Regel also Phenolharz, nur eine geringe Bindung eingeht, so dass bei der geschilderten Biegebelastung die Zwischenlage 30 vom Schleifkorn 11 bzw. der Armierung 18 oder 19 abreißt. Ansonsten ist der Aufbau einer solchen Schleifscheibe 1' gleich wie der bereits geschilderte.A separating layer 20 'can not only consist of two intermediate layers 21, 22, but as shown in Fig. 6 from only a relatively thick intermediate layer 30 exist, which consists of a material that occurs when caused by the described bend in the attack area 10 about shear directed radially to the axis 6 shearing forces in and thereby practically dissolved in two intermediate layers. Such properties for example, have cardboard or paper. Basically it is too conceivable that the only one intermediate layer 30 made of a material, for example a suitable plastic, which, with the binder, in So usually phenolic resin, only a small bond is received, so that at the described bending load, the intermediate layer 30 from the abrasive grain 11th or the reinforcement 18 or 19 breaks off. Otherwise, the structure of a such grinding wheel 1 'as already described.

Bei Einsatz der erfindungsgemäßen Schrupp-Schleifscheibe 1, 1' in der eingangs bereits geschilderten Weise wird zuerst der radial äußere Bereich 29 abgearbeitet. Wenn die Trennschicht 20 bzw. 20' am Außenumfang 9 freigelegt ist, dann führt die geschilderte Ausgestaltung der Trennschicht bzw. Trennschichten 20 oder 20' dazu, dass die Schleifscheibe 1 bzw. 1' das Verhalten mehrerer paketierter Schleifscheiben aufweist, wobei aber die Festigkeit und Stabilität der Schleifscheibe als Kompaktschleifscheibe innerhalb der Trennschicht 20 in dem Bereich der Kröpfung 25 und im Einspann-Bereich 26 erhalten bleibt. Die durch die radiale Erstreckung der Trennschicht 20 bzw. 20' definierten Arbeitsbereiche 23 der Schleifscheibe 1, 1' können sich radial gegeneinander verschieben und somit unter den axialen Kräften federnd ausweichen. Die Amplitude der durch die Verbiegung im Angriffs-Bereich 10 und der anschließenden Rückstellung auftretenden Schwingung wird hierdurch gegenüber durchgehend als Verbund-Schleifscheibe ausgebildeten Schleifscheiben stark reduziert. Dies bewirkt ein weicheres und vibrationsärmeres Schleifen. Für die Dicke e einer Trennschicht 20 bzw. 20' gilt: 0,1 mm ≤e ≤2,0 mm, wobei die größeren Dicken-Bereiche primär bei einlagigen Zwischenlagen 30 vorkommen werden, wenn diese aus Pappe bestehen.When using the roughing grinding wheel 1, 1 'according to the invention in the At the beginning already described way, the radially outer area is first 29 processed. If the separating layer 20 or 20 'on the outer circumference 9 is exposed, then leads the described embodiment of the separation layer or separation layers 20 or 20 'cause the grinding wheel 1 or 1' the behavior of several packetized grinding wheels has, but the strength and stability of the grinding wheel as a compact grinding wheel within the separating layer 20 in the region of the crank 25 and in Clamping area 26 is maintained. The through the radial extent of the Separating layer 20 or 20 'defined working areas 23 of the grinding wheel 1, 1 'can move radially against each other and thus among the Dodge resilient axial forces. The amplitude of the bending occurring in the attack area 10 and the subsequent provision As a result, oscillation becomes continuous as a composite grinding wheel trained grinding wheels greatly reduced. this causes a softer and less vibration sanding. For the thickness e one Separation layer 20 or 20 'applies: 0.1 mm ≤e ≤2.0 mm, the larger Thickness regions occur primarily in single-layer liners 30 if they are made of cardboard.

Claims (9)

Schrupp-Schleifscheibe, die aus mittels Bindemittel gebundenem Schleifkorn (11) besteht, jeweils eine benachbart zur Oberseite (13) und zur Unterseite (12) angeordnete Armierung (15, 14) aufweist, weitere in das Schleifkorn (11) eingebettete Armierungen (18, 19) aufweist, eine Mittel-Öffnung (4) aufweist, eine Mittel-Achse (6) aufweist, einen Außenumfang (9) aufweist, einen radial außen liegenden Arbeitsbereich (23) aufweist und einen Außen-Durchmesser (D1) aufweist, für den im Verhältnis zur Dicke (c) gilt: 10c ≤D1, dadurch gekennzeichnet, dass sie mindestens zwei Schichten (16, 17) von gebundenem Schleifkom (11) aufweist, die jeweils in Richtung der Mittel-Achse (6) beidseitig durch je eine Armierung (15, 19, 14, 18) verstärkt sind und
dass zwischen einander benachbarten Schichten (16, 17) eine ringförmige, sich bis in die Nähe des Außenumfangs (9) erstreckende Trennschicht (20, 20') mit einem Außen-Durchmesser (D20) und einem Innen-Durchmesser (d20) und einer Dicke (e) angeordnet ist, die die einander benachbarten Schichten (16, 17) voneinander trennt, aber in Richtung der Mittel-Achse (6) gegeneinander abstützt.Roughing grinding wheel, the consists of bonded abrasive grain (11), each has an adjacent to the top (13) and the bottom (12) arranged reinforcement (15, 14), further in the abrasive grain (11) embedded reinforcements (18, 19), has a central opening (4), a center axis (6), an outer periphery (9), has a radially outer working area (23) and an outer diameter (D 1 ) for which relative to the thickness (c): 10c ≤D 1 , characterized in that it comprises at least two layers (16, 17) of bound Schleifkom (11) which are respectively reinforced in the direction of the central axis (6) on both sides by a respective reinforcement (15, 19, 14, 18) and
in that between adjacent layers (16, 17) there is an annular separating layer (20, 20 ') extending to the vicinity of the outer circumference (9) and having an outer diameter (D 20 ) and an inner diameter (d 20 ) and a thickness (e) is arranged, which separates the adjacent layers (16, 17) from each other, but in the direction of the central axis (6) is supported against each other. Schrupp-Schleifscheibe nach Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine Trennschicht (20) aus zwei aneinander liegenden Zwischenlagen (21, 22) besteht. Roughing grinding wheel according to claim 1, characterized in that the at least one separating layer (20) consists of two adjacent intermediate layers (21, 22). Schrupp-Schleifscheibe nach Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine Trennschicht (20') aus einer unter Scherung radial zur Mittel-Achse (6) auf- bzw. abreißenden Zwischenlage (30) besteht.Rough grinding wheel according to claim 1, characterized in that the at least one separating layer (20 ') consists of a shearing radially to the central axis (6) up or tearing intermediate layer (30). Schrupp-Schleifscheibe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass für die Dicke (e) der mindestens einen Trennschicht (20, 20') gilt: 0,1 mm ≤e ≤2,0 mm.Roughing grinding wheel according to one of claims 1 to 3, characterized in that for the thickness (e) of the at least one separating layer (20, 20 ') applies: 0.1 mm ≤e ≤ 2.0 mm. Schrupp-Schleifscheibe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass ein bis drei Trennschichten (20, 20') vorgesehen sind.Roughing grinding wheel according to one of claims 1 to 3, characterized in that one to three separating layers (20, 20 ') are provided. Schrupp-Schleifscheibe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass bei Vorhandensein nur einer Trennschicht (20, 20') diese - in Richtung der Mittel-Achse - im mittleren Drittel der Scheibe (1, 1') angeordnet ist.Rough grinding wheel according to one of claims 1 to 5, characterized in that in the presence of only one separating layer (20, 20 ') - in the middle third of the disc (1, 1') is arranged - in the direction of the central axis. Schrupp-Schleifscheibe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass für den Außen-Durchmesser (D20) der Schleifscheibe (1, 1') gilt: 100 mm ≤D20 ≤300 mm.Roughing grinding wheel according to one of claims 1 to 6, characterized in that for the outer diameter (D 20 ) of the grinding wheel (1, 1 ') applies: 100 mm ≤D 20 ≤300 mm. Schrupp-Schleifscheibe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass für die Dicke (c) der Schleifscheibe gilt: 4 mm ≤c ≤12 mm. Rough grinding wheel according to one of claims 1 to 7, characterized in that for the thickness (c) of the grinding wheel applies: 4 mm ≤c ≤12 mm. Schrupp-Schleifscheibe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Trennschicht (20, 20') sich über den Arbeitsbereich (23) erstreckt, wobei gilt: 0,2 ≤d20/D1 ≤0,65.Roughing grinding wheel according to one of claims 1 to 8, characterized in that the separating layer (20, 20 ') extends over the working area (23), wherein: 0.2 ≤d 20 / D 1 ≤ 0.65.
EP04027627A 2003-12-19 2004-11-20 Roughing disc Expired - Lifetime EP1543923B1 (en)

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DE10359747A DE10359747A1 (en) 2003-12-19 2003-12-19 Rough-grinding wheel
DE10359747 2003-12-19

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FR2898070A1 (en) * 2006-03-06 2007-09-07 Saint Gobain Abrasifs Tech FINE BEARING WHEEL, USE THEREOF, METHOD AND DEVICE FOR MANUFACTURING THE SAME
DE202008014496U1 (en) 2008-06-04 2009-01-15 August Rüggeberg Gmbh & Co. Kg Fan wheel
DE102008023946B3 (en) * 2008-05-16 2009-04-02 August Rüggeberg Gmbh & Co. Kg Rough-grinding wheel
EP2760636A1 (en) 2011-09-27 2014-08-06 Saint-Gobain Abrasives, Inc. Noise-reduced abrasive articles
CN106346379A (en) * 2016-11-24 2017-01-25 东莞市金利威磨料磨具有限公司 Formulation and processing method of a resin grinding wheel angle grinding disc
CN108778629A (en) * 2016-03-03 2018-11-09 3M创新有限公司 Central dip grinding wheel
WO2020078563A1 (en) 2018-10-19 2020-04-23 August Rüggeberg Gmbh & Co. Kg Grinding tool and method for producing a grinding tool
WO2020147922A1 (en) 2019-01-14 2020-07-23 August Rüggeberg Gmbh & Co. Kg Grinding disc and use of such a grinding disc

Families Citing this family (3)

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CA2748353C (en) 2008-12-30 2014-04-08 Saint-Gobain Abrasifs Reinforced bonded abrasive tools
PL3081337T3 (en) * 2015-04-02 2022-06-06 Klingspor Ag Roughing disc with core
EP3536455A1 (en) 2018-03-09 2019-09-11 August Rüggeberg GmbH & Co. KG Flad-disc

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DE2632652A1 (en) * 1975-07-23 1977-02-10 Slipmaterial Naxos Vaestervik NOISE-REDUCED GRINDING DISC
DE2610580A1 (en) * 1976-03-13 1977-09-22 Raschke Hans Dieter Dipl Ing Damping layer for grinding disc - has layer of high internal damping characteristic material held sandwiched between grinding layers
EP0229983A2 (en) * 1985-12-20 1987-07-29 Feldmühle Aktiengesellschaft Sound-deadened grinding wheel

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2898070A1 (en) * 2006-03-06 2007-09-07 Saint Gobain Abrasifs Tech FINE BEARING WHEEL, USE THEREOF, METHOD AND DEVICE FOR MANUFACTURING THE SAME
WO2007101957A2 (en) * 2006-03-06 2007-09-13 Saint-Gobain Abrasifs Technologie Et Service Fine fettling wheel, use of said wheel, and method and device for producing the same
WO2007101957A3 (en) * 2006-03-06 2007-10-25 Saint Gobain Abrasifs Tech Fine fettling wheel, use of said wheel, and method and device for producing the same
CN101394972B (en) * 2006-03-06 2013-03-27 圣戈班磨料科技服务公司 Fine fettling wheel, use of the wheel, and method and device for producing the same
AU2007222236B2 (en) * 2006-03-06 2012-10-04 Saint-Gobain Abrasifs Grinding wheel for fine trimming, use of this grinding wheel, and process and device for manufacturing it
AU2008356428B2 (en) * 2008-05-16 2014-08-21 August Ruggeberg Gmbh & Co. Kg Roughing grinding wheel
DE102008023946B3 (en) * 2008-05-16 2009-04-02 August Rüggeberg Gmbh & Co. Kg Rough-grinding wheel
WO2009138114A1 (en) 2008-05-16 2009-11-19 August Rüggeberg Gmbh & Co. Kg Roughing grinding wheel
CN102026777B (en) * 2008-05-16 2013-06-12 奥古斯特吕格贝格有限及两合公司 Roughing grinding wheel
CN102026777A (en) * 2008-05-16 2011-04-20 奥古斯特吕格贝格有限及两合公司 Roughing grinding wheel
CN101596699B (en) * 2008-06-04 2012-10-31 奥古斯特吕格贝格有限及两合公司 Fan-type grinding wheel
US8177608B2 (en) 2008-06-04 2012-05-15 August Rueggeberg Gmbh & Co. Kg Fan-type grinding wheel
EP2130646A1 (en) 2008-06-04 2009-12-09 August Rüggeberg GmbH & Co. KG Flap grinding wheel
DE202008014496U1 (en) 2008-06-04 2009-01-15 August Rüggeberg Gmbh & Co. Kg Fan wheel
EP2760636A1 (en) 2011-09-27 2014-08-06 Saint-Gobain Abrasives, Inc. Noise-reduced abrasive articles
EP2760636A4 (en) * 2011-09-27 2015-07-22 Saint Gobain Abrasives Inc Noise-reduced abrasive articles
CN108778629A (en) * 2016-03-03 2018-11-09 3M创新有限公司 Central dip grinding wheel
CN106346379A (en) * 2016-11-24 2017-01-25 东莞市金利威磨料磨具有限公司 Formulation and processing method of a resin grinding wheel angle grinding disc
CN106346379B (en) * 2016-11-24 2018-11-06 东莞市金利威磨料磨具有限公司 Formula and processing method of resin grinding wheel angle abrasive disc
WO2020078563A1 (en) 2018-10-19 2020-04-23 August Rüggeberg Gmbh & Co. Kg Grinding tool and method for producing a grinding tool
WO2020147922A1 (en) 2019-01-14 2020-07-23 August Rüggeberg Gmbh & Co. Kg Grinding disc and use of such a grinding disc

Also Published As

Publication number Publication date
PL1543923T3 (en) 2006-08-31
EP1543923B1 (en) 2006-05-10
DE502004000537D1 (en) 2006-06-14
DE10359747A1 (en) 2005-07-14
AR046894A1 (en) 2005-12-28
ES2264786T3 (en) 2007-01-16
BRPI0405613A (en) 2005-08-30
ATE325685T1 (en) 2006-06-15
ZA200410025B (en) 2005-09-28
MXPA04012430A (en) 2005-06-23

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