EP1131187B1 - Fan-like grinding wheel - Google Patents

Fan-like grinding wheel Download PDF

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Publication number
EP1131187B1
EP1131187B1 EP99958000A EP99958000A EP1131187B1 EP 1131187 B1 EP1131187 B1 EP 1131187B1 EP 99958000 A EP99958000 A EP 99958000A EP 99958000 A EP99958000 A EP 99958000A EP 1131187 B1 EP1131187 B1 EP 1131187B1
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EP
European Patent Office
Prior art keywords
lamellae
flap disc
backing
layer
grinding
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.)
Expired - Lifetime
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EP99958000A
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German (de)
French (fr)
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EP1131187A1 (en
Inventor
Gustav Eisenberg
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VEREINIGTE SCHMIRGEL- und MASCHINEN-FABRIKEN AG
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VEREINIGTE SCHMIRGEL- und MASCHINEN-FABRIKEN AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties

Definitions

  • the invention relates to a flap disc according to the preamble of claim 1.
  • DE 35 25 620 is a flap disc known, along which along the peripheral zone a circular disk-shaped flexible base plate in radial slots of the peripheral zone grinding lamellae each other arranged overlapping like roof tiles and unsolvable are attached.
  • a circular disk-shaped flexible base plate in radial slots of the peripheral zone grinding lamellae each other arranged overlapping like roof tiles and unsolvable are attached.
  • Base plate designed as a partial disc in its peripheral zone radial slots are present that lead to gill-like Openings are extended into which grinding lamellas are trapped.
  • DE-GM 88 04 148.4 describes a flap disc, which consists of a metallic support plate consists of an outer ring on the fan forming grinding flaps are glued on.
  • the part of the backing plate which carries grinding flaps is frustoconical bent. This is said to be ergonomic created favorable shape and the strength against Centrifugal stress can be increased.
  • DE 38 39 238 discloses a flap disc with a base plate, with the fan-shaped an outer ring of lamellar roof tiles are glued across.
  • the base plate is preferred formed as a metal disc in which Breakthroughs are located, which are preferably round. This Holes are used to allow the adhesive to flow through Back. One attached to the back of the plate Lowering increases the hold of the adhesive. At the same time, the plate has several in the clamping area Notches on the self-locking when tightened ensure against loosening of the nut. Through this Training should create a basic plate, which high operational reliability with a simple production guaranteed.
  • DE 40 20 461 is a flap grinding tool known, which has a support plate with a fastener for placement on a prime mover is provided, as well as with a grinding wheel, a circular disk-shaped, detachable on Support plate attachable carrier and arranged thereon Has abrasives.
  • the carrier consists of a flexible fabric.
  • Lanyard between the Carrier and the support plate is a self-adhesive, Detachable, large surface fastener.
  • the outside diameter of the carrier and the one arranged thereon Grinding flaps are larger than the outside diameter one depending on the progressive degree of wear of the grinding flaps selected and in its diameter adapted to the respective degree of wear Support plate, which with a centric, Pin on the grinding wheel side for a central perforation is provided in the carrier.
  • DE 195 43 597 is a flap disc known for hand grinders, consisting of a round carrier disc with a centrally arranged Device for attachment to a hand grinder and overlapping like a fan on the carrier disc attached grinding flaps that extend up to extend or over the outer edge of the carrier disk these protrude.
  • the surfaces of the grinding flaps serve as a grinding surface.
  • the radially outside Narrow sides of the grinding flaps form the scope of the Flap disc.
  • At least the narrow sides of the Sanding flaps are made with a hardening binder provided, the material-removing on the to be processed Object acts and extends to the grinding surface extends. This training is intended to be a flap disc be created, even with frequent Use in areas that are difficult to access such as angles, Corners or the like has a long service life.
  • the object of the present invention is in a flap disc of the type mentioned Type in such a way that the grinding effect with reduced Improved material and manufacturing costs becomes.
  • the invention proposes for the lamellae Flap disc two different types of flaps the first slats, consisting of a pad, one attached to it Basic bond layer and one on the basic bond layer Spreading layer made of abrasive grain and one applied to the abrasive grain scattering layer Top layer, and on the other second slats, consisting from one pad and only one on the pad applied layer with abrasive substances.
  • the training according to the invention has the advantage that the slats overall easier and cheaper can be produced, which means the flap disc overall becomes cheaper.
  • FIG. 1 shows a flap disc 2 with a support plate 4, which has a central through hole 6 for fastening the flap disc on a machine.
  • the arranged perpendicular or inclined to the axis of rotation are fan-like or roof tile-like each other overlapping slats 10 attached, preferably glued.
  • the fins 10 have radially outer sides 11, which end with the edge of the carrier plate or tower above it and the straight or can be curved.
  • the slats 10 consist of two types of slats, first slats 12, consisting of a base 14, a basic bond layer 15 applied thereon, one applied to the base bond layer 15 Spreading layer made of abrasive grain 16 and one on the abrasive grain scattering layer 16 applied cover layer 18, and second slats 20, consisting of a base 22 and a layer 24 applied to the base with abrasive substances, cf. 2 and 3.
  • the abrasive grain 16 is partially in the Basic bond layer 15 embedded and the cover layer 18 is chosen only so strong that the abrasive grain with its tips protrude from the top layer, cf. Fig. 2.
  • the cover layer 18 of the first slats 12 can additionally provided with abrasive substances his.
  • grinding active substances for example Potassium fluoroborate, cryolite, calcium fluoride and chiolite used.
  • Example 1 In a known manner, grinding lamellae were glued in a fan-like overlapping manner on a carrier disk of 115 mm in diameter. 60 slats with a size of 18 x 25 mm were used.
  • the abrasive flaps consisted of a base made of equipped polyester fabric with a base bond layer, in which zirconium corundum in grain 40 was sprinkled in an amount of 700 g / m 2 as abrasive grain, a first cover bond applied to the abrasive grain scattering layer with an application of 300 g / m 2 , which ensures the strength of the abrasive grain layer, and a second cover bond with an abrasive substance (potassium fluoroborate), which supports the grinding process, and which was applied with a binder in an amount of 380 g / m 2 .
  • an abrasive substance potassium fluoroborate
  • This flap disc was tested on a machine with a speed of 4,200 rpm, which has a cutting speed of 25 m / sec. equivalent.
  • Round pipes made of V2A 4301 with an outside diameter of 90 mm and a wall thickness of 10 mm were ground. 153 g of material were machined in 10 intervals of 5 minutes each.
  • Example 2 Grinding lamellae according to Example 1 were glued to the carrier disk, the following lamellae being used alternately.
  • the 1st, 3rd, 5th etc. consisted of material as in Example 1, but without a second cover binding.
  • the 2nd, 4th, 6th, etc. lamella consisted of a base on which only one layer was applied, which contained potassium fluoroborate as an abrasive substance and was applied with a binder in an amount of 480 g / m 2 . 373 g of material were machined under the same conditions as in Example 1.
  • Example 3 According to Example 2, one was Flap disc made, which grinding flaps according to Example 1, however, without a second cover binding and lamellas from a base with only one active grinding Containing coating in the ratio of 1: 2 d. H. the disc only showed 1/3 of the amount of abrasive grain from Example 1. With this disc were under same conditions as in Example 1 353 g of material machined.
  • Example 4 There was a flap disc prepared according to Example 2, in which the grinding active Substance potassium fluoroborate was replaced by cryolite. This disc was made under the same conditions as in Example 1, 394 g of material are machined.
  • Example 5 There was a flap disc prepared according to Example 1, using instead of zirconium corundum as abrasive grain sintered alumina the same Grain size was used. It was with this disc under the same conditions as in Example 1 201 g Machined material.
  • Example 6 A flap disc according to the example 4 was made with sintered aluminum oxide instead of zirconium aluminum oxide manufactured. It was under with this disc same conditions as in Example 1 370 g material machined.
  • Example 7 A flap disc according to example 6 was made with fins, the calcium carbonate instead of cryolite as an active abrasive contained. With this disc were among the same Conditions as in Example 1, 203 g of material machined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Massaging Devices (AREA)
  • Led Device Packages (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Surgical Instruments (AREA)
  • Packaging For Recording Disks (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

A flap disc consists of a backing plate to whose peripheral zone laminae overlapping like a fan or roof tiles are attached. In order to improve the abrasive effect of such a flap disc using less material and simpler production, the lamellae 10 consist of first lamellae 12, comprising a backing 14, a base bonding coat 15 applied to the backing, a layer of abrasive grain 16 deposited over the base bonding coat 15, and a size coat 18 over the layer of deposited abrasive grain 16, and second lamellae 20, consisting of a backing 22 and a layer 24 with grinding active fillers applied to the backing.

Description

Die Erfindung betrifft eine Fächerschleifscheibe gemäß Oberbegriff des Anspruchs 1.The invention relates to a flap disc according to the preamble of claim 1.

Durch die DE 35 25 620 ist eine Fächerschleifscheibe bekannt, bei welcher entlang der Umfangzone eines kreisscheibenförmigen flexiblen Grundtellers in radialen Schlitzen der Umfangzone Schleiflamellen einander dachziegelartig übergreifend angeordnet und unlösbar befestigt sind. Um den Grundteller leichter und einfacher auszubilden und dennoch bei höheren Drehzahlen die Schleiflamellen sicher zu halten, ist der Grundteller als Teilscheibe ausgebildet, in deren Umfangzone radiale Schlitze vorhanden sind, die zu kiemenartigen Öffnungen erweitert sind, in welche Schleiflamellen eingeklemmt sind.DE 35 25 620 is a flap disc known, along which along the peripheral zone a circular disk-shaped flexible base plate in radial slots of the peripheral zone grinding lamellae each other arranged overlapping like roof tiles and unsolvable are attached. To make the base plate lighter and easier to train and still at higher speeds Keeping the grinding flaps safe is the key Base plate designed as a partial disc, in its peripheral zone radial slots are present that lead to gill-like Openings are extended into which grinding lamellas are trapped.

Aus der DE 35 41 347 ist eine Fächerschleifscheibe bekannt, bei welcher entlang der Umfangzone eines kreisscheibenförmigen flexiblen Grundtellers Schleiflamellen einander dachziegelartig übergreifend angeordnet sind, durch radiale Schlitze in der Umfangzone hindurchgesteckt und an der Rückseite durch einen Spannteller festgeklemmt sind. Der Grundteller und der Spannteller sind als Blechscheiben ausgebildet und am Außenumfang kraft- oder formschlüssig miteinander verbunden. Durch diese Ausbildung soll die Fächerschleifscheibe nach der Herstellung als ein einstückiges Werkzeug gehandhabt werden können, und zwar während des Transports und vom Benutzer.From DE 35 41 347 is a flap disc known, in which along the circumferential zone circular disk-shaped flexible base plate grinding lamella arranged overlapping each other like roof tiles are inserted through radial slots in the peripheral zone and at the back through a clamping plate are clamped. The base plate and the Clamping plates are designed as sheet metal washers and on The outer circumference is positively or positively connected. Through this training, the flap disc after manufacturing as a one piece tool can be handled during the Transports and by the user.

Das DE-GM 88 04 148.4 beschreibt eine Fächerschleifscheibe, welche aus einem metallischen Stützteller besteht, auf dem fächerartig einen äußeren Ring bildende Schleiflamellen aufgeklebt sind. Der die Schleiflamellen tragende Teil des Stütztellers ist kegelstumpfförmig gebogen. Hierdurch soll eine ergonomisch günstige Form geschaffen und die Festigkeit gegenüber Fliehkraftbeanspruchung erhöht werden.DE-GM 88 04 148.4 describes a flap disc, which consists of a metallic support plate consists of an outer ring on the fan forming grinding flaps are glued on. The the The part of the backing plate which carries grinding flaps is frustoconical bent. This is said to be ergonomic created favorable shape and the strength against Centrifugal stress can be increased.

Die DE 38 39 238 offenbart eine Fächerschleifscheibe mit einem Grundteller, bei der fächerartig auf einem äußeren Ring Schleiflamellen dachziegelartig übergreifend aufgeklebt sind. Der Grundteller ist vorzugsweise als Metallscheibe ausgebildet, in der sich Durchbrüche befinden, die vorzugsweise rund sind. Diese Löcher dienen dem Durchfließen des Klebstoffes auf die Rückseite. Eine auf der Rückseite des Tellers angebrachte Senkung verstärkt den Halt des Klebstoffes. Gleichzeitig weist der Teller im Spannbereich mehrere Kerbungen auf, die beim Festspannen eine Selbsthemmung gegen das Lösen der Mutter gewährleisten. Durch diese Ausbildung soll ein Grundteller geschaffen werden, welcher bei einer einfachen Herstellung eine hohe Betriebssicherheit gewährleistet.DE 38 39 238 discloses a flap disc with a base plate, with the fan-shaped an outer ring of lamellar roof tiles are glued across. The base plate is preferred formed as a metal disc in which Breakthroughs are located, which are preferably round. This Holes are used to allow the adhesive to flow through Back. One attached to the back of the plate Lowering increases the hold of the adhesive. At the same time, the plate has several in the clamping area Notches on the self-locking when tightened ensure against loosening of the nut. Through this Training should create a basic plate, which high operational reliability with a simple production guaranteed.

Aus der DE 40 20 461 ist ein Fächerschleifwerkzeug bekannt, welches einen Stützteller aufweist, der mit einem Befestigungsmittel zum Aufsetzen auf eine Antriebsmaschine versehen ist, sowie mit einer Schleifscheibe, die einen kreisscheibenförmigen, lösbar am Stützteller befestigbaren Träger und darauf angeordneten Schleifmittel aufweist. Der Träger besteht aus einem flexiblen Gewebe. Verbindungsmittel zwischen dem Träger und dem Stützteller ist ein selbsthaftender, lösbarer, großflächig angebrachter Flächenhaftverschluß. Auf dem Träger sind radial ausgerichtete, sich fächerartig überlappende Schleiflamellen aufgeklebt. Der Außendurchmesser des Trägers und der darauf angeordneten Schleiflamellen ist größer als der Außendurchmesser eines in Abhängigkeit vom fortschreitenden Abnutzungsgrad der Schleiflamellen ausgewählten und in seinem Durchmesser dem jeweiligen Abnutzungsgrad angepaßten Stütztellers, welcher mit einem zentrischen, schleifscheibenseitigen Stift für eine zentrische Lochung im Träger versehen ist. Durch diese Ausbildung soll erreicht werden, daß beim Schleifen in Eckbereichen das Schleifmittel möglichst vollständig genutzt werden kann.DE 40 20 461 is a flap grinding tool known, which has a support plate with a fastener for placement on a prime mover is provided, as well as with a grinding wheel, a circular disk-shaped, detachable on Support plate attachable carrier and arranged thereon Has abrasives. The carrier consists of a flexible fabric. Lanyard between the Carrier and the support plate is a self-adhesive, Detachable, large surface fastener. There are radially aligned ones on the carrier glued fan-like overlapping lamellas. The outside diameter of the carrier and the one arranged thereon Grinding flaps are larger than the outside diameter one depending on the progressive degree of wear of the grinding flaps selected and in its diameter adapted to the respective degree of wear Support plate, which with a centric, Pin on the grinding wheel side for a central perforation is provided in the carrier. Through this training should be achieved that when grinding in corner areas use the abrasive as completely as possible can be.

Durch die DE 195 43 597 ist eine Fächerschleifscheibe für Handschleifmaschinen bekannt, bestehend aus einer runden Trägerscheibe mit einer zentrisch angeordneten Einrichtung zur Befestigung an einer Handschleifmaschine und fächerartig überlappenden, auf der Trägerscheibe befestigten Schleiflamellen, die sich bis zum äußeren Rand der Trägerscheibe erstrecken oder über diese hinausragen. Die Oberflächen der Schleiflamellen dienen als Schleiffläche. Die radial außenliegenden Schmalseiten der Schleiflamellen bilden den Umfang der Fächerschleifscheibe. Zumindest die Schmalseiten der Schleiflamellen sind mit einem aushärtenden Bindemittel versehen, das materialabtragend auf den zu bearbeitenden Gegenstand einwirkt und sich bis zur Schleiffläche hin erstreckt. Durch diese Ausbildung soll eine Fächerschleifscheibe geschaffen werden, die auch bei häufigem Einsatz in schwer zugänglichen Bereichen wie Winkeln, Ecken oder dergleichen eine hohe Lebensdauer aufweist.DE 195 43 597 is a flap disc known for hand grinders, consisting of a round carrier disc with a centrally arranged Device for attachment to a hand grinder and overlapping like a fan on the carrier disc attached grinding flaps that extend up to extend or over the outer edge of the carrier disk these protrude. The surfaces of the grinding flaps serve as a grinding surface. The radially outside Narrow sides of the grinding flaps form the scope of the Flap disc. At least the narrow sides of the Sanding flaps are made with a hardening binder provided, the material-removing on the to be processed Object acts and extends to the grinding surface extends. This training is intended to be a flap disc be created, even with frequent Use in areas that are difficult to access such as angles, Corners or the like has a long service life.

Es ist bekannt, bei den bekannten Fächerschleifscheiben Schleiflamellen zu verwenden, bei denen auf eine Unterlage eine Grundbindungsschicht, darauf eine Schleifkornschicht, auf die Schleifkornschicht eine erste Deckbindung und in recht aufwendiger Weise auf die erste Deckbindung eine zweite Deckbindung aufgebracht sind. Die erste Deckbindung soll für die Festigkeit der Schleifkornschicht sorgen und kann zusätzlich schleifaktive Stoffe, wie KBF,, Kryolith o. ä. aufweisen. Die zweite Deckschicht weist schleifaktive Stoffe auf, die von Bedeutung sind für die Schleifwirkung der Fächerschleifscheibe.It is known in the known flap discs To use grinding flaps where one underlay a basic bond layer, one on top Abrasive grain layer, one on the abrasive grain layer first cover binding and in a rather complex manner the first cover binding applied a second cover binding are. The first cover binding is meant for strength the abrasive grain layer and can additionally have abrasive substances such as KBF, cryolite or the like. The second top layer has abrasive substances which are important for the grinding effect of the Flap disc.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine Fächerschleifscheibe der eingangs genannten Art so auszubilden, daß die Schleifwirkung bei verringertem Material- und Herstellungsaufwand verbessert wird.The object of the present invention is in a flap disc of the type mentioned Type in such a way that the grinding effect with reduced Improved material and manufacturing costs becomes.

Diese Aufgabe wird durch die Erfindung gemäß Anspruch 1 gelöst.This object is achieved by the invention according to claim 1 solved.

Vorteilhafte und zweckmäßige Weiterbildungen sind in den Unteransprüchen angegeben.Advantageous and expedient further training are specified in the subclaims.

Die Erfindung schlägt vor für die Lamellen der Fächerschleifscheibe zwei verschiedene Arten von Lamellen einzusetzen, und zwar zum einen erste Lamellen, bestehend aus einer Unterlage, einer darauf aufgebrachten Grundbindungsschicht und einer auf die Grundbindungsschicht aufgebrachten Streulage aus Schleifkorn und einer auf die Schleifkornstreulage aufgebrachten Deckschicht, und zum anderen zweite Lamellen, bestehend aus einer Unterlage und nur einer auf die Unterlage aufgebrachten Schicht mit schleifaktiven Stoffen.The invention proposes for the lamellae Flap disc two different types of flaps the first slats, consisting of a pad, one attached to it Basic bond layer and one on the basic bond layer Spreading layer made of abrasive grain and one applied to the abrasive grain scattering layer Top layer, and on the other second slats, consisting from one pad and only one on the pad applied layer with abrasive substances.

Dabei kann beispielsweise jede zweite, dritte, vierte etc. Lamelle nach Art der ersten Lamellen oder nach Art der zweiten Lamellen und können die weiteren Lamellen nach Art der zweiten Lamellen bzw. ersten Lamellen ausgebildet sein. Es können sich auch Gruppen von ersten Lamellen und Gruppen von zweiten Lamellen abwechseln, wobei die Anzahl der Lamellen in den Gruppen gleich oder unterschiedlich sein kann.Every second, third, fourth etc. slat according to the type of the first slat or according to the type of second slats and the others Slats in the manner of the second slats or first slats be trained. There can also be groups of first slats and groups of second slats alternate with the number of slats in the groups can be the same or different.

Die erfindungsgemäße Ausbildung hat den Vorteil, daß die Lamellen insgesamt einfacher und preiswerter herstellbar sind, wodurch die Fächerschleifscheibe insgesamt preiswerter wird. Durch das Vorsehen der schleifaktiven Stoffe auf separaten Lamellen mit nur einer Bindeschicht auf der Unterlage, welche die schleifaktiven Stoffe aufweist, ergibt sich eine Einsparung an Schleifkorn und es entfällt die Notwendigkeit, die schleifaktiven Stoffe in einer zweiten Deckbindungsschicht auftragen zu müssen. Außerdem ergeben sich Möglichkeiten das Abbauverhalten der schleifaktiven Stoffe gegenüber einer Anordnung in einer zweiten Deckbindung gemäß Stand der Technik zu verbessern. Dabei ist auch eine Erhöhung der aufgebrachten Menge an schleifaktiven Stoffen möglich, ohne die Agressivität der Fächerscheibe herabzusetzen. Gleichzeitig hat sich überraschenderweise gezeigt, daß die Schleifwirkung der erfindungsgemäßen Fächerschleifscheibe verbessert wird.The training according to the invention has the advantage that the slats overall easier and cheaper can be produced, which means the flap disc overall becomes cheaper. By providing the abrasive fabrics on separate lamellas with only a binding layer on the base, which the If there are abrasive substances, there is a saving of abrasive grain and there is no need the abrasive fabrics in a second cover bond layer to have to apply. Also revealed possibilities of the degradation behavior of the grinding active Fabrics versus an arrangement in a second To improve cover binding according to the prior art. there is also an increase in the amount applied Abrasive substances possible without the aggressiveness the serrated washer. At the same time Surprisingly shown that the grinding effect of flap disc according to the invention is improved.

Die Erfindung soll nachfolgend anhand der beigefügten Zeichnung, die ein Ausführungsbeispiel zeigt, näher erläutert werden.The invention will now be described with reference to the accompanying Drawing showing an embodiment are explained in more detail.

Es zeigen

Fig. 1
eine Fächerschleifscheibe in der Draufsicht,
Fig. 2
eine bei der Fächerschleifscheibe nach Fig. 1 verwendete erste Lamelle im Schnitt und
Fig. 3
eine bei der Fächerschleifscheibe nach Fig. 1 verwendete zweite Lamelle im Schnitt.
Show it
Fig. 1
a flap disc in top view,
Fig. 2
a first lamella used in the flap disc of FIG. 1 in section and
Fig. 3
a second lamella used in the flap disc of FIG. 1 in section.

Gleiche Bauteile in den Figuren der Zeichnung sind mit den gleichen Bezugszeichen versehen.The same components in the figures of the drawing are provided with the same reference numerals.

Die Fig. 1 zeigt eine Fächerschleifscheibe 2 mit einem Trägerteller 4, welcher eine zentrische Durchgangsbohrung 6 zur Befestigung der Fächerschleifscheibe an einer Maschine aufweist.1 shows a flap disc 2 with a support plate 4, which has a central through hole 6 for fastening the flap disc on a machine.

Auf der Umfangzone 8 des Trägertellers 4, die senkrecht oder geneigt zur Rotationsachse angeordnet ist, sind fächerartig bzw. dachziegelartig einander überlappende Lamellen 10 befestigt, vorzugsweise aufgeklebt. Die Lamellen 10 weisen radial außenliegende Seiten 11 auf, die mit dem Rand des Trägertellers abschließen oder diesen überragen und die gerade oder gebogen ausgebildet sein können.On the peripheral zone 8 of the carrier plate 4, the arranged perpendicular or inclined to the axis of rotation are fan-like or roof tile-like each other overlapping slats 10 attached, preferably glued. The fins 10 have radially outer sides 11, which end with the edge of the carrier plate or tower above it and the straight or can be curved.

Die Lamellen 10 bestehen aus zwei Arten von Lamellen, ersten Lamellen 12, bestehend aus einer Unterlage 14, einer darauf aufgebrachten Grundbindungsschicht 15, einer auf die Grundbindungsschicht 15 aufgebrachten Streulage aus Schleifkorn 16 und einer auf die Schleifkornstreulage 16 aufgebrachten Deckschicht 18, und aus zweiten Lamellen 20, bestehend aus einer Unterlage 22 und einer auf die Unterlage aufgebrachten Schicht 24 mit schleifaktiven Stoffen, vgl. Fig. 2 und 3.The slats 10 consist of two types of slats, first slats 12, consisting of a base 14, a basic bond layer 15 applied thereon, one applied to the base bond layer 15 Spreading layer made of abrasive grain 16 and one on the abrasive grain scattering layer 16 applied cover layer 18, and second slats 20, consisting of a base 22 and a layer 24 applied to the base with abrasive substances, cf. 2 and 3.

Das Schleifkorn 16 ist dabei teilweise in der Grundbindungsschicht 15 eingebettet und die Deckschicht 18 ist nur so stark gewählt, daß das Schleifkorn mit seinen Spitzen aus der Deckschicht herausragt, vgl. Fig. 2.The abrasive grain 16 is partially in the Basic bond layer 15 embedded and the cover layer 18 is chosen only so strong that the abrasive grain with its tips protrude from the top layer, cf. Fig. 2.

In der Fig. 1 wechseln sich die ersten und zweiten Lamellen 12 und 20 ab. Es kann aber auch jede (n+1)-te Lamelle (n = 2, 3, 4 ...) als erste oder zweite Lamelle 12 oder 20 ausgebildet sein. Es können sich auch Gruppen aus mehreren ersten und Gruppen aus mehreren zweiten Lamellen abwechseln, wobei die Zahl der Lamellen pro Gruppe unterschiedlich sein kann.In Fig. 1, the first and second alternate Slats 12 and 20 off. But it can also be every (n + 1) th Slat (n = 2, 3, 4 ...) as the first or second slat 12 or 20 may be formed. There can also be groups from several first and groups from several second Alternate slats, the number of slats can be different per group.

Die Deckschicht 18 der ersten Lamellen 12 kann zusätzlich noch mit schleifaktiven Stoffen versehen sein.The cover layer 18 of the first slats 12 can additionally provided with abrasive substances his.

Als schleifaktive Stoffe werden beispielsweise Kaliumfluoroborat, Kryolith, Calciumfluorid und Chiolith eingesetzt.As grinding active substances, for example Potassium fluoroborate, cryolite, calcium fluoride and chiolite used.

Nachfolgend folgen einige Beispiele zur weiteren Erläuterung der Erfindung.Below are some examples of others Explanation of the invention.

Beispiel 1: Auf einer Trägerscheibe von 115 mm Durchmesser wurden Schleiflamellen in bekannter Weise fächerartig überlappend aufgeklebt. Es wurden 60 Lamellen mit einer Größe von 18 x 25 mm eingesetzt. Die Schleiflamellen bestanden aus einer Unterlage aus ausgerüstetem Polyestergewebe mit einer Grundbindungsschicht, in welche Zirkonkorund in Korn 40 als Schleifkorn in einer Menge von 700 g/m2 gestreut war, einer ersten auf die Schleifkornstreulage aufgebrachten Deckbindung mit einem Auftrag von 300 g/m2, die für die Festigkeit der Schleifkornschicht sorgt, und einer zweiten Deckbindung mit einem schleifaktiven Stoff (Kaliumfluoroborat), der den Schleifvorgang unterstützt, und der mit einem Bindemittel in einer Menge von 380 g/m2 aufgebracht wurde. Die Prüfung dieser Fächerschleifscheibe erfolgte auf einer Maschine mit einer Drehzahl von 4.200 U/Min., die einer Schnittgeschwindigkeit von 25 m/Sek. entspricht. Es wurden Rundrohre aus V2A 4301 mit einem Außendurchmesser von 90 mm und einer Wandstärke von 10 mm geschliffen. In 10 Intervallen von je 5 Minuten wurden 153 g Material zerspant.Example 1: In a known manner, grinding lamellae were glued in a fan-like overlapping manner on a carrier disk of 115 mm in diameter. 60 slats with a size of 18 x 25 mm were used. The abrasive flaps consisted of a base made of equipped polyester fabric with a base bond layer, in which zirconium corundum in grain 40 was sprinkled in an amount of 700 g / m 2 as abrasive grain, a first cover bond applied to the abrasive grain scattering layer with an application of 300 g / m 2 , which ensures the strength of the abrasive grain layer, and a second cover bond with an abrasive substance (potassium fluoroborate), which supports the grinding process, and which was applied with a binder in an amount of 380 g / m 2 . This flap disc was tested on a machine with a speed of 4,200 rpm, which has a cutting speed of 25 m / sec. equivalent. Round pipes made of V2A 4301 with an outside diameter of 90 mm and a wall thickness of 10 mm were ground. 153 g of material were machined in 10 intervals of 5 minutes each.

Beispiel 2: Es wurden Schleiflamellen gemäß Beispiel 1 auf die Trägerscheibe aufgeklebt, wobei abwechselnd folgende Lamellen verwendet wurden. Die 1., 3., 5. usw. bestand aus Material wie in Beispiel 1, jedoch ohne zweite Deckbindung. Die 2., 4., 6. usw. Lamelle bestand aus einer Unterlage, auf die nur eine Schicht aufgebracht wurde, welche Kaliumfluoroborat als schleifaktiven Stoff enthielt und mit einem Bindemittel in einer Menge von 480 g/m2 aufgebracht wurde. Unter gleichen Bedingungen wie in Beispiel 1 wurden 373 g Material zerspant.Example 2: Grinding lamellae according to Example 1 were glued to the carrier disk, the following lamellae being used alternately. The 1st, 3rd, 5th etc. consisted of material as in Example 1, but without a second cover binding. The 2nd, 4th, 6th, etc. lamella consisted of a base on which only one layer was applied, which contained potassium fluoroborate as an abrasive substance and was applied with a binder in an amount of 480 g / m 2 . 373 g of material were machined under the same conditions as in Example 1.

Beispiel 3: Entsprechend dem Beispiel 2 wurde eine Fächerschleifscheibe hergestellt, welche Schleiflamellen gemäß Beispiel 1 allerdings ohne zweite Deckbindung und Lamellen aus einer Unterlage mit nur einer schleifaktiven Beschichtung im Verhältnis von 1:2 enthielt, d. h. die Scheibe wies nur noch 1/3 der Schleifkornmenge aus Beispiel 1 auf. Mit dieser Scheibe wurden unter gleichen Bedingungen wie in Beispiel 1 353 g Material zerspant.Example 3: According to Example 2, one was Flap disc made, which grinding flaps according to Example 1, however, without a second cover binding and lamellas from a base with only one active grinding Containing coating in the ratio of 1: 2 d. H. the disc only showed 1/3 of the amount of abrasive grain from Example 1. With this disc were under same conditions as in Example 1 353 g of material machined.

Beispiel 4: Es wurde eine Fächerschleifscheibe gemäß Beispiel 2 hergestellt, bei der der schleifaktive Stoff Kaliumfluoroborat durch Kryolith ersetzt wurde. Mit dieser Scheibe wurden unter gleichen Bedingungen wie in Beispiel 1 394 g Material zerspant.Example 4: There was a flap disc prepared according to Example 2, in which the grinding active Substance potassium fluoroborate was replaced by cryolite. This disc was made under the same conditions as in Example 1, 394 g of material are machined.

Bei den Beispielen 1-4 war der Gewichtsverlust der Scheiben nach dem Schleifen etwa gleich hoch.In Examples 1-4, the weight loss was Disks roughly the same height after grinding.

Beispiel 5: Es wurde eine Fächerschleifscheibe gemäß Beispiel 1 hergestellt, wobei anstelle von Zirkonkorund als Schleifkorn Sinterkorund der gleichen Korngröße eingesetzt wurde. Es wurden mit dieser Scheibe unter gleichen Bedingungen wie in Beispiel 1 201 g Material zerspant.Example 5: There was a flap disc prepared according to Example 1, using instead of zirconium corundum as abrasive grain sintered alumina the same Grain size was used. It was with this disc under the same conditions as in Example 1 201 g Machined material.

Beispiel 6: Eine Fächerschleifscheibe gemäß Beispiel 4 wurde mit Sinterkorund anstelle von Zirkonkorund hergestellt. Es wurden mit dieser Scheibe unter gleichen Bedingungen wie in Beispiel 1 370 g Material zerspant.Example 6: A flap disc according to the example 4 was made with sintered aluminum oxide instead of zirconium aluminum oxide manufactured. It was under with this disc same conditions as in Example 1 370 g material machined.

Beispiel 7: Eine Fächerschleifscheibe gemäß Beispiel 6 wurde mit Lamellen hergestellt, die Calciumcarbonat anstelle von Kryolith als schleifaktiven Stoff enthielten. Mit dieser Scheibe wurden unter gleichen Bedingungen wie in Beispiel 1 203 g Material zerspant.Example 7: A flap disc according to example 6 was made with fins, the calcium carbonate instead of cryolite as an active abrasive contained. With this disc were among the same Conditions as in Example 1, 203 g of material machined.

Bei den Beispielen 5-7 lag der Gewichtsverlust der Scheiben nach dem Schleifen etwa in gleicher Höhe.In Examples 5-7, the weight loss was Disks after grinding at about the same height.

Claims (7)

  1. Flap disc with a backing plate to whose peripheral zone laminae overlapping like a fan or roof tiles are attached, characterized in that the lamellae (10) consist of first lamellae (12), comprising a backing (14), a base bonding coat (15) applied to the backing, a layer of abrasive grain (16) deposited over the base bonding coat, and a size coat (18) over the layer of deposited abrasive grain (16), and second lamellae (20), consisting of a backing (22) and a layer (24) with active abrasive materials applied to the backing.
  2. Flap disc according to claim 1, characterized in that every (n+1)th lamella (10) (n = 2, 3, 4...) is formed as a first or second lamella (12 or 20).
  3. Flap disc according to claim 1, characterized in that alternating groups of first lamellae (12) and groups of second lamellae (20) are provided.
  4. Flap disc according to claim 3, characterized in that the number of lamellae per group is equal or different.
  5. Flap disc according to claim 1, characterized in that the size coat (18) of the first lamellae (12) is provided with active abrasive materials.
  6. Flap disc according to claim 1 or 5, characterized in that the active abrasive materials consist of potassium fluoroborate, cryolite, calcium fluoride or chiolite.
  7. Flap disc according to one of the preceding claims, characterized in that the abrasive grain of the flap disc consists of zirconia alumina or sintered aluminium oxide or a mixture of the two.
EP99958000A 1998-11-20 1999-11-05 Fan-like grinding wheel Expired - Lifetime EP1131187B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19853550A DE19853550C1 (en) 1998-11-20 1998-11-20 Flat grinding disc has laminated plate with grinding inclusions and covering layer
DE19853550 1998-11-20
PCT/EP1999/008494 WO2000030809A1 (en) 1998-11-20 1999-11-05 Fan-like grinding wheel

Publications (2)

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EP1131187A1 EP1131187A1 (en) 2001-09-12
EP1131187B1 true EP1131187B1 (en) 2002-08-28

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EP99958000A Expired - Lifetime EP1131187B1 (en) 1998-11-20 1999-11-05 Fan-like grinding wheel

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US (1) US6582289B1 (en)
EP (1) EP1131187B1 (en)
JP (1) JP4681120B2 (en)
CN (1) CN1131129C (en)
AT (1) ATE222836T1 (en)
AU (1) AU756920B2 (en)
CA (1) CA2350060C (en)
DE (2) DE19853550C1 (en)
DK (1) DK1131187T3 (en)
ES (1) ES2183627T3 (en)
HU (1) HU227803B1 (en)
PT (1) PT1131187E (en)
RU (1) RU2205102C2 (en)
SK (1) SK5922001A3 (en)
TR (1) TR200101380T2 (en)
WO (1) WO2000030809A1 (en)
ZA (1) ZA200103288B (en)

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AU756920B2 (en) 2003-01-30
CA2350060A1 (en) 2000-06-02
HU227803B1 (en) 2012-03-28
CA2350060C (en) 2008-06-03
EP1131187A1 (en) 2001-09-12
US6582289B1 (en) 2003-06-24
JP4681120B2 (en) 2011-05-11
HUP0104239A2 (en) 2002-03-28
PT1131187E (en) 2003-01-31
DK1131187T3 (en) 2002-12-23
JP2002530213A (en) 2002-09-17
DE59902492D1 (en) 2002-10-02
SK5922001A3 (en) 2001-10-08
TR200101380T2 (en) 2001-12-21
AU1551600A (en) 2000-06-13
WO2000030809A1 (en) 2000-06-02
CN1131129C (en) 2003-12-17
HUP0104239A3 (en) 2008-08-28
DE19853550C1 (en) 2000-03-09
RU2205102C2 (en) 2003-05-27
CN1324287A (en) 2001-11-28
ES2183627T3 (en) 2003-03-16
ZA200103288B (en) 2002-02-27
ATE222836T1 (en) 2002-09-15

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