EP0560153A1 - Grinding wheel - Google Patents

Grinding wheel Download PDF

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Publication number
EP0560153A1
EP0560153A1 EP93103189A EP93103189A EP0560153A1 EP 0560153 A1 EP0560153 A1 EP 0560153A1 EP 93103189 A EP93103189 A EP 93103189A EP 93103189 A EP93103189 A EP 93103189A EP 0560153 A1 EP0560153 A1 EP 0560153A1
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EP
European Patent Office
Prior art keywords
grinding wheel
grinding
grain
abrasive
circumferentially closed
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
EP93103189A
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German (de)
French (fr)
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EP0560153B1 (en
Inventor
Wilhelm Schulze
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.)
Tyrolit-Schleifmittelwerke Swarovski KG
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski 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.)
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Publication date
Application filed by Tyrolit-Schleifmittelwerke Swarovski KG filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP0560153A1 publication Critical patent/EP0560153A1/en
Application granted granted Critical
Publication of EP0560153B1 publication Critical patent/EP0560153B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B24D5/08—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental with reinforcing means

Definitions

  • the invention relates to a grinding wheel with an abrasive material made of abrasive grain, for example corundum, an organic binder such as phenolic resin, and at least partially abrasive fillers, at least one reinforcing fabric being inserted into the abrasive material.
  • abrasive material made of abrasive grain, for example corundum, an organic binder such as phenolic resin, and at least partially abrasive fillers, at least one reinforcing fabric being inserted into the abrasive material.
  • the invention relates to relatively narrow discs, such as cutting discs, but is not limited to cutting discs.
  • the object of the invention is to improve grinding wheels provided with reinforcing fabric in such a way that an increased grinding performance is achieved with constant strength and blasting speed.
  • the reinforcing fabric has a plurality of circumferentially closed openings comprising several mesh areas.
  • the circumferentially closed openings are advantageously arranged in a circular ring near the circumference of the grinding wheel.
  • the circumferentially closed openings themselves are preferably circular, but can also have other patterns describe. For example, oval openings can also be considered.
  • the grinding wheel has a fine-grain ring in the hub area and a transition area with mixed grain of actual grinding grain and fine grain is provided, which merges with the actual grinding area and that of the Reinforcement mesh that runs through the entire circumference of the grinding wheel and has openings only in the grinding area.
  • FIG. 1 shows a schematic top view, partly in section, of a grinding wheel according to the invention
  • FIG. 2 shows a section along the line I-I of FIG. 1.
  • the grinding wheel according to the invention is formed in a conventional manner from an abrasive compound 1, into which reinforcing fabrics 2 made of a glass fiber fabric impregnated with resol resin are placed at an axial distance.
  • the abrasive compound 1 comprises abrasive grain 3, for example corundum, such as electrical corundum and fillers 4, which are embedded in a phenolic resin bond 5.
  • abrasive grain 3 for example corundum, such as electrical corundum and fillers 4, which are embedded in a phenolic resin bond 5.
  • the grinding wheel is provided with a fine-grain ring 6, which has the same binder but not necessarily the same fillers as the actual grinding ring 7, but is provided with grinding grain 8 of a finer grain size. From the fine-grain ring 6 to the actual slip ring 7, a transition region 9, which contains both the abrasive grain 3 as in the slip ring 7, and the fine grain 8 of the fine-grain ring.
  • the grain structure in the transition area preferably follows the filler curve.
  • the two reinforcement fabrics 2 are in the outer area, i.e. in the outer third of the grinding wheel radius, provided with circular, circumferentially closed openings 10, which are arranged along a circular ring 11.
  • the circumferentially closed openings 10 of the two reinforcement fabrics 2 are offset in the circumferential direction.

Abstract

A grinding wheel having a grinding composition composed of a basic particle (3), for example aluminium oxide, of an organic binder (5), such as phenolic resin, and of grinding-active fillers (4). Reinforcing-fabric elements (2) are inserted into the grinding composition. The reinforcing-fabric elements (2) have a plurality of circumferentially closed openings (10) enclosing mesh areas. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schleifscheibe mit einer Schleifmasse aus Schleifkorn, beispielsweise Korund, einem organischen Bindemittel, wie Phenolharz, und zumindestens zum Teil schleifaktiven Füllstoffen, wobei in die Schleifmasse mindestens ein Armierungsgewebe eingelegt ist.The invention relates to a grinding wheel with an abrasive material made of abrasive grain, for example corundum, an organic binder such as phenolic resin, and at least partially abrasive fillers, at least one reinforcing fabric being inserted into the abrasive material.

Insbesondere bezieht sich die Erfindung auf relativ schmale Scheiben, wie Trennscheiben, ist jedoch nicht auf Trennscheiben beschränkt.In particular, the invention relates to relatively narrow discs, such as cutting discs, but is not limited to cutting discs.

Bei organisch gebundenen Schleifscheiben ist es bekannt, diese zur Erhöhung der Festigkeit und des Sprengwertes mit einem oder mehreren Armierungsgeweben zu versehen. Als Armierungsgewebe kommen vorteilhaft Glasfasergewebe in Betracht. Es hat sich nun gezeigt, daß wenn Armierungsgewebe verwendet werden, die Festigkeit und die zulässige Umfangsgeschwindigkeit der Schleifscheibe zwar zunimmt, die Schleifleistung jedoch abnimmt.In the case of organically bonded grinding wheels, it is known to provide them with one or more reinforcing fabrics in order to increase the strength and the explosive value. Glass fiber fabrics are advantageously considered as reinforcing fabrics. It has now been shown that when reinforcing fabrics are used, the strength and the permissible peripheral speed of the grinding wheel increase, but the grinding performance decreases.

Aufgabe der Erfindung ist es, mit Armierungsgewebe versehene Schleifscheiben dahingehend zu verbessern, daß bei gleichbleibender Festigkeit und Sprenggeschwindigkeit eine erhöhte Schleifleistung erzielt wird.The object of the invention is to improve grinding wheels provided with reinforcing fabric in such a way that an increased grinding performance is achieved with constant strength and blasting speed.

Dies wird erfindungsgemäß dadurch erreicht, daß das Armierungsgewebe mehrere Maschenbereiche umfassende umfanggeschlossene Öffnungen aufweist.According to the invention, this is achieved in that the reinforcing fabric has a plurality of circumferentially closed openings comprising several mesh areas.

Vorteilhaft sind die umfanggeschlossenen Öffnungen in einem Kreisring nahe dem Umfang der Schleifscheibe angeordnet. Die umfanggeschlossenen Öffnungen selbst sind vorzugsweise kreisförmig, können aber auch andere Muster beschreiben. Beispielsweise können auch ovale Öffnungen in Betracht gezogen werden.The circumferentially closed openings are advantageously arranged in a circular ring near the circumference of the grinding wheel. The circumferentially closed openings themselves are preferably circular, but can also have other patterns describe. For example, oval openings can also be considered.

Durch die Öffnungen im Armierungsgewebe wird im Trenn- bzw. Schleifbereich eine erhöhte Schleifleistung erzielt, da der Anteil an nicht schleiffähigem Material in diesem Bereich herabgesetzt ist. Die Festigkeit bzw. Sprenggeschwindigkeit der Scheibe wird jedoch nicht in gleichem Maße herabgesetzt oder gar nicht beeinflußt.Through the openings in the reinforcement fabric, an increased grinding performance is achieved in the cutting or grinding area, since the proportion of non-grinding material is reduced in this area. However, the strength or speed of explosion of the pane is not reduced to the same extent or is not influenced at all.

Um den Sprengwert und die Seitensteifigkeit der Scheibe zu verbessern, ist in einem bevorzugten Ausführungsbeispiel vorgesehen, daS die Schleifscheibe im Nabenbereich einen Feinkornring aufweist und wobei ein Übergangsbereich mit Mischkorn aus eigentlichem Schleifkorn und Feinkorn vorgesehen ist, der zum eigentlichen Schleifbereich übergeht und daß die von der Nabe zum Schleifscheibenumfang durchgehenden Armierungsgewebe die Öffnungen ausschließlich im Schleifbereich aufweisen.In order to improve the explosive value and the lateral rigidity of the wheel, it is provided in a preferred embodiment that the grinding wheel has a fine-grain ring in the hub area and a transition area with mixed grain of actual grinding grain and fine grain is provided, which merges with the actual grinding area and that of the Reinforcement mesh that runs through the entire circumference of the grinding wheel and has openings only in the grinding area.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Figuren der Zeichnung eingehend beschrieben.An exemplary embodiment of the invention is described in detail below with reference to the figures of the drawing.

Fig. 1 zeigt eine schematisch gehaltene Draufsicht teilweise im Schnitt auf eine erfindungsgemäße Schleifscheibe, die Fig. 2 zeigt einen Schnitt nach der Linie I-I der Fig. 1.1 shows a schematic top view, partly in section, of a grinding wheel according to the invention, FIG. 2 shows a section along the line I-I of FIG. 1.

Die erfindungsgemäße Schleifscheibe wird in herkömmlicher Art und Weise von einer Schleifmasse 1 gebildet, in die in axialem Abstand Armierungsgewebe 2 aus einem mit Resolharz imprägniertem Glasfasergewebe eingelegt sind.The grinding wheel according to the invention is formed in a conventional manner from an abrasive compound 1, into which reinforcing fabrics 2 made of a glass fiber fabric impregnated with resol resin are placed at an axial distance.

Die Schleifmasse 1 umfaßt Schleifkorn 3, beispielsweise Korund, wie Elektrokorund und Füllstoffe 4, die in eine Phenolharzbindung 5 eingebettet sind.The abrasive compound 1 comprises abrasive grain 3, for example corundum, such as electrical corundum and fillers 4, which are embedded in a phenolic resin bond 5.

Im Nabenbereich ist die Schleifscheibe mit einem Feinkornring 6 versehen, der das gleiche Bindemittel aber nicht unbedingt die gleichen Füllstoffe wie der eigentliche Schleifring 7 aufweist, jedoch mit Schleifkorn 8 einer feineren Körnung versehen ist. Vom Feinkornring 6 zum eigentlichen Schleifring 7 führt ein Übergangsbereich 9, der sowohl Schleifkorn 3 wie im Schleifring 7 enthält, als auch Feinkorn 8 des Feinkornringes.In the hub area, the grinding wheel is provided with a fine-grain ring 6, which has the same binder but not necessarily the same fillers as the actual grinding ring 7, but is provided with grinding grain 8 of a finer grain size. From the fine-grain ring 6 to the actual slip ring 7, a transition region 9, which contains both the abrasive grain 3 as in the slip ring 7, and the fine grain 8 of the fine-grain ring.

Der Kornaufbau im Übergangsbereich folgt vorzugsweise der Füller-Kurve.The grain structure in the transition area preferably follows the filler curve.

Es folgt ein Beispiel einer Rezeptur einer erfindungsgemäßen Schleifscheibe.

Schleifring 7:
Schleifkorn-Korund 850 my
Kornvolumen 47 %
Korndichte 4,17
Bindung - Phenolharz
Bindungsvolumen 48 %
Bindungsdichte 2,229
Porenvolumen 5 %
schleifaktive Füllstoffe
Feinkornring 6:
Schleifkorn-Korund 275 my
Kornvolumen 45 %
Korndichte 3,95
Bindung - Phenolharz
Bindungsvolumen 43,1
Bindungsdichte 2,218
Porenvolumen 11,9

Die Herstellung der Schleifscheibe erfolgte wie nachstehend beschrieben.The following is an example of a recipe for a grinding wheel according to the invention.
Slip ring 7:
Abrasive grain corundum 850 my
Grain volume 47%
Grain density 4.17
Binding - phenolic resin
Binding volume 48%
Binding density 2.229
Pore volume 5%
active grinding fillers
Fine grain ring 6:
Abrasive grain corundum 275 my
Grain volume 45%
Grain density 3.95
Binding - phenolic resin
Binding volume 43.1
Binding density 2.218
Pore volume 11.9

The grinding wheel was manufactured as described below.

Beginnend mit dem Flanschgewebe 13 werden jeweils Feinkornschicht und Grobkornschichtring angebracht und dann das Innengewebe 2 eingelegt. Dies erfolgt dreimal, wobei noch dem Drittenmal statt des Innengewebes 2 das Flanschgewebe 13 aufgelegt wird. Nun wird auf das Maß 12,5 mm Scheibendicke gepreßt und der Scheibenrohling gespannt. Zum Schluß wird die Scheibe im Ofen ausgehärtet und abgedreht.Starting with the flange fabric 13, fine-grain layer and coarse-grain layer ring are applied and then the inner fabric 2 is inserted. This takes place three times, the flange fabric 13 being placed on the third time instead of the inner fabric 2. Now press to the dimension of 12.5 mm disc thickness and clamp the disc blank. Finally, the pane is hardened in the oven and turned off.

Erfindungsgemäß sind die beiden Armierungsgewebe 2 im äußeren Bereich, d.h. im äußeren Drittel des Schleifscheibenradius, mit kreisrunden umfanggeschlossenen Öffnungen 10 versehen, die entlang eines Kreisringes 11 angeordnet sind. Die umfanggeschlossenen Öffnungen 10 der beiden Armierungsgewebe 2 sind in Umfangsrichtung versetzt.According to the invention, the two reinforcement fabrics 2 are in the outer area, i.e. in the outer third of the grinding wheel radius, provided with circular, circumferentially closed openings 10, which are arranged along a circular ring 11. The circumferentially closed openings 10 of the two reinforcement fabrics 2 are offset in the circumferential direction.

Im Bereich der Öffnungen 10 ergibt sich naturgemäß eine verbesserte Durchbindung der Schleifmasse 1 und diese Bereiche weisen durchgehend Schleifkorn 3 auf, wodurch die Schleifleistung der Schleifscheibe merkbar verbessert wird und die Stabilität weiter verbessert werden kann.In the area of the openings 10 there is of course an improved binding of the grinding compound 1 and these areas have abrasive grain 3 throughout, whereby the grinding performance of the grinding wheel is noticeably improved and the stability can be further improved.

In der Fig. 2 und in den Öffnungen 10 der Fig. 1 wurde mit den dicken Querlinien die Schraffur für Kunststoff eingezeichnet.In Fig. 2 and in the openings 10 of Fig. 1, the hatching for plastic was drawn with the thick cross lines.

Claims (6)

Schleifscheibe mit einer Schleifmasse aus Schleifkorn, beispielsweise Korund, einem organischen Bindemittel, wie Phenolharz, und zumindestens zum Teil schleifaktiven Füllstoffen, wobei in die Schleifmasse mindestens ein Armierungsgewebe eingelegt ist, dadurch gekennzeichnet, daß das Armierungsgewebe (2) mehrere Maschenbereiche umfassende, umfanggeschlossene Öffnungen (10) aufweist.Abrasive disc with an abrasive material made of abrasive grain, e.g. corundum, an organic binder, such as phenolic resin, and at least partially abrasive fillers, with at least one reinforcing fabric being inserted into the abrasive material, characterized in that the reinforcing fabric (2) comprises a plurality of mesh areas, circumferentially closed openings ( 10). Schleifscheibe nach Anspruch 1, dadurch gekennzeichnet, daß die umfanggeschlossenen Öffnungen (10) zumindest annähernd kreisrund oder oval sind.Grinding wheel according to claim 1, characterized in that the circumferentially closed openings (10) are at least approximately circular or oval. Schleifscheibe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Öffnungen (10) auf einem oder mehreren Kreisring(en) (11) angeordnet sind.Grinding wheel according to claim 1 or 2, characterized in that the openings (10) are arranged on one or more circular rings (11). Schleifscheibe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sich die umfanggeschlossenen Öffnungen (10) in der äußeren Hälfte, vorzugsweise im äußeren Drittel des Radius der Schleifscheibe befinden.Grinding wheel according to one of claims 1 to 3, characterized in that the circumferentially closed openings (10) are located in the outer half, preferably in the outer third of the radius of the grinding wheel. Schleifscheibe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Schleifscheibe im Nabenbereich einen Feinkornring (6) aufweist und wobei ein Übergangsbereich (9) mit Mischkorn aus eigentlichem Schleifkorn (3) und Feinkorn (8) vorgesehen ist, der zum eigentlichen Schleifbereich (7) übergeht und daß die von der Nabe (12) zum Schleifscheibenumfang durchgehenden Armierungsgewebe (2) die umfanggeschlossenen Öffnungen (10) ausschließlich im Schleifbereich (3) aufweisen.Grinding wheel according to one of claims 1 to 4, characterized in that the grinding wheel has a fine grain ring (6) in the hub area and a transition area (9) with mixed grain of actual grinding grain (3) and fine grain (8) is provided, which is the actual grinding area (7) passes over and that the reinforcing fabric (2) passing through from the hub (12) to the circumference of the grinding wheel has the circumferentially closed openings (10) exclusively in the grinding area (3). Schleifscheibe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß jedes Armierungsgewebe (2) von einem mit Resolharz imprägnierten Glasfasergewebe gebildet wird.Grinding wheel according to one of claims 1 to 5, characterized in that each reinforcement fabric (2) is formed by a glass fiber fabric impregnated with resol resin.
EP19930103189 1992-03-09 1993-02-27 Grinding wheel Expired - Lifetime EP0560153B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT44592A AT397781B (en) 1992-03-09 1992-03-09 GRINDING WHEEL
AT445/92 1992-03-09

Publications (2)

Publication Number Publication Date
EP0560153A1 true EP0560153A1 (en) 1993-09-15
EP0560153B1 EP0560153B1 (en) 1996-05-01

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Family Applications (1)

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EP (1) EP0560153B1 (en)
AT (1) AT397781B (en)
DE (1) DE59302414D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998010895A1 (en) * 1996-09-16 1998-03-19 Comet, Umetni Brusi In Nekovine D.D. Abrasive cutting and grinding wheel
CN1061285C (en) * 1998-01-06 2001-01-31 梁永辉 Super thin cutting grinding wheel and its producing technology
CN110666670A (en) * 2019-03-11 2020-01-10 四川省三台县固锐实业有限责任公司 Polishing and grinding integrated wheel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039310B8 (en) * 2004-08-13 2006-05-11 Novatecs Gmbh grinding wheel
DE102012002104A1 (en) * 2012-02-06 2013-08-08 Egon Evertz Kg (Gmbh & Co.) Grinding disk e.g. longitudinal grinding disk, for use in steel manufacturing area for grinding slab surface to clear away blow holes, has fiber mat extending in radial direction around longitudinal axis and embedded in disk portion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2354852A1 (en) * 1976-06-17 1978-01-13 Norton Co COMPOSITE ABRASIVE CUTTING WHEEL
DE3545308A1 (en) * 1985-12-20 1987-06-25 Feldmuehle Ag GRINDING DISC WITH DAMPING
DE3606581A1 (en) * 1986-02-28 1987-09-03 Nkk Nihon Structure Co Grinding or cutting disc
DE3720435A1 (en) * 1986-07-01 1988-01-07 Charalambos Tasoulidis Quiet-operating diamond-carrying cutting disc for marble and garnet
EP0523260A1 (en) * 1991-07-13 1993-01-20 Heinrich Mummenhoff Blade body of fibre reinforced plastic for circular saw blades or abrasive cutting wheels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2354852A1 (en) * 1976-06-17 1978-01-13 Norton Co COMPOSITE ABRASIVE CUTTING WHEEL
DE3545308A1 (en) * 1985-12-20 1987-06-25 Feldmuehle Ag GRINDING DISC WITH DAMPING
DE3606581A1 (en) * 1986-02-28 1987-09-03 Nkk Nihon Structure Co Grinding or cutting disc
DE3720435A1 (en) * 1986-07-01 1988-01-07 Charalambos Tasoulidis Quiet-operating diamond-carrying cutting disc for marble and garnet
EP0523260A1 (en) * 1991-07-13 1993-01-20 Heinrich Mummenhoff Blade body of fibre reinforced plastic for circular saw blades or abrasive cutting wheels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TECHNOLOGICAL DIGESTS Bd. 9, Nr. 2, Februar 1964, Seite 40 I.T.D. NØ 1463 'Slots eliminate arching of cut-off wheels.' *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998010895A1 (en) * 1996-09-16 1998-03-19 Comet, Umetni Brusi In Nekovine D.D. Abrasive cutting and grinding wheel
CN1061285C (en) * 1998-01-06 2001-01-31 梁永辉 Super thin cutting grinding wheel and its producing technology
CN110666670A (en) * 2019-03-11 2020-01-10 四川省三台县固锐实业有限责任公司 Polishing and grinding integrated wheel

Also Published As

Publication number Publication date
ATA44592A (en) 1993-11-15
DE59302414D1 (en) 1996-06-05
AT397781B (en) 1994-06-27
EP0560153B1 (en) 1996-05-01

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