EP0451572A2 - Grinding wheel - Google Patents

Grinding wheel Download PDF

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Publication number
EP0451572A2
EP0451572A2 EP91104483A EP91104483A EP0451572A2 EP 0451572 A2 EP0451572 A2 EP 0451572A2 EP 91104483 A EP91104483 A EP 91104483A EP 91104483 A EP91104483 A EP 91104483A EP 0451572 A2 EP0451572 A2 EP 0451572A2
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EP
European Patent Office
Prior art keywords
grinding
grinding wheel
electrically conductive
fabric
conductive metal
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.)
Withdrawn
Application number
EP91104483A
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German (de)
French (fr)
Other versions
EP0451572A3 (en
Inventor
Wolfgang Huber
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.)
Filing date
Publication date
Application filed by Tyrolit-Schleifmittelwerke Swarovski KG filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP0451572A2 publication Critical patent/EP0451572A2/en
Publication of EP0451572A3 publication Critical patent/EP0451572A3/en
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a grinding wheel, in particular a cutting wheel with a grinding body made of abrasive grain, binder and preferably filler-active and grinding-inactive fillers, the grinding body being provided with at least one wearing fabric.
  • the invention relates to a device for determining the degree of wear of a grinding wheel.
  • the object of the invention is therefore to provide a grinding or cutting-off wheel, the degree of wear of which can be controlled by an electronic sensor, and the indicator of which does not significantly influence the accuracy of the grinding wheel or the MAK values which arise when the grinding wheel is worn.
  • the object of the invention is achieved in that the fabric, which is inserted on a flat side of the grinding wheel or within the wheel width in this, has electrically conductive metal threads and / or that at least one electrically conductive metal thread or foil strip is braided into the tissue, the electrically conductive metal threads or foil strips being at least partially on the surface of the grinding wheel, so that they can be scanned by an electrical sensor.
  • Such a fabric with electrically conductive metal threads can be arranged on one as well as on both flat sides of the grinding wheel.
  • An embodiment of the invention provides that only a part of the threads forming the fabric are electrically conductive, for example it would be possible for only the weft or the warp of the fabric to consist of metal threads.
  • the metallically conductive threads can form the fabric or part of the fabric, but they can also be braided into the fabric. It is essential that the fabric enables the metallically conductive metal threads to be held absolutely securely on the grinding wheel or in the grinding wheel body. It has been found that individual threads placed laterally on the grinding wheel are torn away during operation.
  • the fabric with electrically conductive metal threads attached to the flat side of the grinding body is advantageously wider-meshed than a reinforcing fabric located in the grinding body.
  • the device according to the invention is characterized in that the fabric, which is inserted on a flat side of the grinding wheel or within the wheel width in this, has electrically conductive metal threads and / or in that at least one electrically conductive metal thread or foil strip is woven into the tissue, the electrically conductive metal threads or foil strips are at least partially on the surface of the grinding wheel and in that the device is provided with an electrical sensor which measures the wear of the metal thread or foil strips.
  • Fig. 1 shows a schematic side view of a grinding wheel according to the invention
  • Fig. 2 shows a section along the line II Fig. 1
  • Fig. 3 shows a section of the side view
  • Fig. 4 shows a view from the line of the arrow A of Fig. 3rd
  • the grinding wheel according to the invention has a conventional grinding body 1 with abrasive grain, for example corundum, an organic or inorganic binder and preferably fillers that are both grinding and inactive.
  • abrasive grain for example corundum
  • an organic or inorganic binder preferably fillers that are both grinding and inactive.
  • a conventional reinforcing fabric 2 consisting of carbon fibers or glass fibers is inserted into the grinding body 1.
  • a wide-mesh fabric 3 is pressed into the abrasive body 1 that is formed by metallic threads 4 in the embodiment shown in FIG. 2.
  • the metallic threads 4 serve an electronic sensor as an indicator of the degree of wear of the grinding wheel, since they are used up together with the grinding wheel material.
  • the fabrics 3 have good anchoring with the material of the grinding wheel 1, which is obtained by partially pressing them into the grinding wheel 1.
  • the adhesion of the fabric 3 can be increased by an adhesion improver.
  • the fabrics 3 are made of non-electrically conductive material, but additional, metallic, electrically conductive threads or foil strips 5 are woven into this fabric 3.
  • the metallic conductive Threads 5 or film strips are aligned radially in the grinding wheel.
  • Preferred materials for the electrically conductive threads 4, 5 are copper and aluminum.

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

Abstract

A grinding wheel with an abrasive (1) comprising abrasive grain, binder and preferably grinding-active and grinding-inactive fillers. The abrasive (1) is provided with at least one wearing fabric (3), which is embedded in the abrasive (1) on a flat side thereof and either has electrically conductive metal filaments (4) or there are electrically conductive metal filaments (4) woven into the fabric (3). The electrically conductive metal filaments (4) or foil strips (5) lie at least partially on the surface of the abrasive (1). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schleifscheibe insbesondere Trennschleifscheibe mit einem Schleifkörper aus Schleifkorn, Bindemittel und vorzugsweise schleifaktiven und schleifinaktiven Füllstoffen, wobei der Schleifkörper mit mindestens einem verschleißenden Gewebe versehen ist.The invention relates to a grinding wheel, in particular a cutting wheel with a grinding body made of abrasive grain, binder and preferably filler-active and grinding-inactive fillers, the grinding body being provided with at least one wearing fabric.

Weiters bezieht sich die Erfindung auf eine Vorrichtung zur Bestimmung des Abnutzungsgrades einer Schleifscheibe.Furthermore, the invention relates to a device for determining the degree of wear of a grinding wheel.

Es ist bekannt den Abnutzungsgrad und den Abstand einer Schleif- oder Trennschleifscheibe zum Werkstück mittels eines elektronischen Fühlers zu überwachen. Zu diesem Zweck wurden die Schleifscheiben an mindestens einer Flachseite mit einem elektrisch leitfähigen Lack oder dgl. besprüht. Die elektrisch leitfähige Schicht lieferte dem Fühler den Kennwert, bei einer vorgegebenen Abnutzung der Schleifscheibe die Maschine zu steuern.It is known to monitor the degree of wear and the distance of a grinding or cutting wheel from the workpiece by means of an electronic sensor. For this purpose, the grinding wheels were sprayed on at least one flat side with an electrically conductive paint or the like. The electrically conductive layer provided the sensor with the characteristic value of controlling the machine if the grinding wheel was worn for a given time.

Durch das Besprühen mit elektrisch leitfähigem Lack ergaben sich jedoch beim Betrieb d.h. während des Schleifens Probleme hinsichtlich des dabei hervorgerufenen Staubes.However, spraying with electrically conductive paint resulted in operation, i.e. problems with the resulting dust during grinding.

Ein weiterer Nachteil ergab sich durch Verrunden der Kanten der Trenn- bzw. Schleifscheiben und bezüglich der Meßgenauigkeit.Another disadvantage was the rounding of the edges of the cutting or grinding wheels and the measuring accuracy.

Aufgabe der Erfindung ist es daher eine Schleif- bzw. Trennschleifscheibe zu schaffen, deren Abnutzungsgrad von einem elektronischen Fühler kontrolliert werden kann und deren Indikator weder die Genauigkeit der Schleifscheibe noch die MAK-Werte die beim Abrieb der Schleifscheibe entstehen wesentlich beeinflußt.The object of the invention is therefore to provide a grinding or cutting-off wheel, the degree of wear of which can be controlled by an electronic sensor, and the indicator of which does not significantly influence the accuracy of the grinding wheel or the MAK values which arise when the grinding wheel is worn.

Die erfindungsgemäße Aufgabe wird dadurch gelöst, daß das Gewebe, das an einer Flachseite des Schleifkörpers oder innerhalb der Scheibenbreite in diesen eingelegt ist elektrisch leitende Metallfäden aufweist und/oder daß mindestens ein elektrisch leitender Metallfaden oder Folienband in das Gewebe eingeflochten ist, wobei die elektrisch leitenden Metallfäden bzw. Folienbänder zumindestens teilweise an der Oberfläche des Schleifkörpers liegen, sodaß sie von einem elektrischen Fühler abtastbar sind.The object of the invention is achieved in that the fabric, which is inserted on a flat side of the grinding wheel or within the wheel width in this, has electrically conductive metal threads and / or that at least one electrically conductive metal thread or foil strip is braided into the tissue, the electrically conductive metal threads or foil strips being at least partially on the surface of the grinding wheel, so that they can be scanned by an electrical sensor.

Ein derartiges Gewebe mit elektrisch leitenden Metallfäden kann sowohl an einer als auch an beiden Flachseiten der Schleifscheibe angeordnet sein.Such a fabric with electrically conductive metal threads can be arranged on one as well as on both flat sides of the grinding wheel.

Ein Ausführungsbeispiel der Erfindung sieht vor, daß nur ein Teil der das Gewebe bildenden Fäden elektrisch leitend sind, beispielsweise wäre es möglich, daß nur der Schuß oder die Kette des Gewebes aus Metallfäden besteht.An embodiment of the invention provides that only a part of the threads forming the fabric are electrically conductive, for example it would be possible for only the weft or the warp of the fabric to consist of metal threads.

Die metallisch leitenden Fäden können sowohl das Gewebe oder Teil des Gewebes bilden, sie können aber auch zusätzlich in das Gewebe eingeflochten sein. Wesentlich ist, daß es das Gewebe ermöglicht, die metallisch leitenden Metallfäden absolut sicher an der Schleifscheibe bzw. im Schleifscheibenkörper zu halten. Es hat sich erwiesen, daß einzelne auf den Schleifkörper seitlich aufgelegte Fäden während des Betriebes weggerissen werden.The metallically conductive threads can form the fabric or part of the fabric, but they can also be braided into the fabric. It is essential that the fabric enables the metallically conductive metal threads to be held absolutely securely on the grinding wheel or in the grinding wheel body. It has been found that individual threads placed laterally on the grinding wheel are torn away during operation.

Das an der Flachseite des Schleifkörpers angebrachte Gewebe mit elektrisch leitenden Metallfäden ist vorteilhaft weitmaschiger als ein im Schleifkörper befindliches Armierungsgewebe.The fabric with electrically conductive metal threads attached to the flat side of the grinding body is advantageously wider-meshed than a reinforcing fabric located in the grinding body.

Die erfindungsgemäße Vorrichtung ist dadurch gekennzeichnet, daß das Gewebe, das an einer Flachseite des Schleifkörpers oder innerhalb der Scheibenbreite in diesen eingelegt ist, elektrisch leitende Metallfäden aufweist und/oder, daß mindestens ein elektrisch leitender Metallfaden oder Folienband in das Gewebe eingewoben ist, wobei die elektrisch leitenden Metallfäden bzw. Folienbänder zumindestens teilweise an der Oberfläche des Schleifkörpers liegen und dadurch, daß die Vorrichtung mit einem elektrischen Fühler versehen ist, der die Abnützung des oder der Metallfäden bzw. Folienbänder mißt.The device according to the invention is characterized in that the fabric, which is inserted on a flat side of the grinding wheel or within the wheel width in this, has electrically conductive metal threads and / or in that at least one electrically conductive metal thread or foil strip is woven into the tissue, the electrically conductive metal threads or foil strips are at least partially on the surface of the grinding wheel and in that the device is provided with an electrical sensor which measures the wear of the metal thread or foil strips.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Figuren der beiliegenden Zeichnung eingehend beschrieben.Exemplary embodiments of the invention are described in detail below with reference to the figures in the accompanying drawing.

Die Fig. 1 zeigt eine schematisch gehaltene Seitenansicht einer erfindungsgemäßen Schleifscheibe, die Fig. 2 zeigt einen Schnitt nach der Linie I-I Fig. 1, die Fig. 3 zeigt einen Ausschnitt der Seitenansicht und die Fig. 4 zeigt eine Ansicht aus der Linie des Pfeiles A der Fig. 3.Fig. 1 shows a schematic side view of a grinding wheel according to the invention, Fig. 2 shows a section along the line II Fig. 1, Fig. 3 shows a section of the side view and Fig. 4 shows a view from the line of the arrow A of Fig. 3rd

Die erfindungsgemäße Schleifscheibe weist einen herkömmlichen Schleifkörper 1 mit Schleifkorn beispielsweise Korund, einem organischen oder unorganischen Bindemittel und vorzugsweise schleifaktiven sowie schleifinaktiven Füllstoffen auf.The grinding wheel according to the invention has a conventional grinding body 1 with abrasive grain, for example corundum, an organic or inorganic binder and preferably fillers that are both grinding and inactive.

In den Schleifkörper 1 ist wie aus der Fig. 2 ersichtlich ein herkömmliches Armierungsgewebe 2 bestehend aus Kohlenfasern bzw. Glasfasern eingelegt.As can be seen from FIG. 2, a conventional reinforcing fabric 2 consisting of carbon fibers or glass fibers is inserted into the grinding body 1.

An den beiden Flachseiten des Schleifkörpers 1 ist jeweils ein weitmaschiges Gewebe 3 in den Schleifkörper 1 eingedrückt, daß im Ausführungsbeispiel nach der Fig. 2 von metallischen Fäden 4 gebildet wird. Die metallischen Fäden 4 dienen dabei einem elektronischen Fühler als Indikator für den Abnützungsgrad der Schleifscheibe, da sie zusammen mit dem Schleifscheibenmaterial aufgebraucht werden.On the two flat sides of the abrasive body 1, a wide-mesh fabric 3 is pressed into the abrasive body 1 that is formed by metallic threads 4 in the embodiment shown in FIG. 2. The metallic threads 4 serve an electronic sensor as an indicator of the degree of wear of the grinding wheel, since they are used up together with the grinding wheel material.

Wesentlich ist, daß die Gewebe 3 eine gute Verankerung mit dem Material des Schleifkörpers 1 haben, was dadurch erhalten wird, daß sie teilweise in den Schleifkörper 1 eingedrückt sind. Die Haftung der Gewebe 3 kann noch durch einen Haftungsverbesserer erhöht werden.It is essential that the fabrics 3 have good anchoring with the material of the grinding wheel 1, which is obtained by partially pressing them into the grinding wheel 1. The adhesion of the fabric 3 can be increased by an adhesion improver.

Im Ausführungsbeispiel nach den Fig. 3 und 4 sind die Gewebe 3 aus nicht elektrisch leitenden Material aber in dieses Gewebe 3 sind zusätzliche, metallische elektrisch leitende Fäden bzw. Folienbänder 5 eingeflochten. Die metallisch leitenden Fäden 5 bzw. Folienbänder sind dabei in der Schleifscheibe radial ausgerichtet.In the exemplary embodiment according to FIGS. 3 and 4, the fabrics 3 are made of non-electrically conductive material, but additional, metallic, electrically conductive threads or foil strips 5 are woven into this fabric 3. The metallic conductive Threads 5 or film strips are aligned radially in the grinding wheel.

Bevorzugte Materialien für die elektrisch leitenden Fäden 4, 5 sind Kupfer und Aluminium.Preferred materials for the electrically conductive threads 4, 5 are copper and aluminum.

Claims (7)

Schleifscheibe insbesondere Trennschleifscheibe mit einem Schleifkörper aus Schleifkorn, Bindemittel und vorzugsweise schleifaktiven und schleifinaktiven Füllstoffen, wobei der Schleifkörper mit mindestens einem verschleißenden Gewebe versehen ist, dadurch gekennzeichnet, daß das Gewebe (3), das an einer Flachseite des Schleifkörpers (1) oder innerhalb der Scheibenbreite in diesen eingelegt ist elektrisch leitende Metallfäden (4) aufweist und/oder daß mindestens ein elektrisch leitender Metallfaden (4) oder Folienband (5) in das Gewebe (3) eingewoben ist, wobei die elektrisch leitenden Metallfäden (4) bzw. Folienbänder (5) zumindestens teilweise an der Oberfläche des Schleifkörpers (1) liegen, sodaß sie von einem elektrischen Fühler abtastbar sind.Grinding wheel, in particular cut-off wheel with a grinding body made of abrasive grain, binder and preferably grinding-active and grinding-inactive fillers, the grinding body being provided with at least one abrasive cloth, characterized in that the cloth (3) which is on a flat side of the grinding wheel (1) or within the The width of the disc is inserted in it and has electrically conductive metal threads (4) and / or that at least one electrically conductive metal thread (4) or foil strip (5) is woven into the fabric (3), the electrically conductive metal threads (4) or foil strips ( 5) lie at least partially on the surface of the grinding wheel (1), so that they can be scanned by an electrical sensor. Schleifscheibe nach Anspruch 1, dadurch gekennzeichnet, daß nur ein Teil der das Gewebe (4) bildenden Fläche elektrisch leitend ist.Grinding wheel according to claim 1, characterized in that only a part of the surface forming the fabric (4) is electrically conductive. Schleifscheibe nach Anspruch 2, dadurch gekennzeichnet, daß nur Kette oder Schuß des Gewebes (4) aus Metallfäden (4) bestehen.Grinding wheel according to claim 2, characterized in that only warp or weft of the fabric (4) consist of metal threads (4). Schleifscheibe nach Anspruch 1, dadurch gekennzeichnet, daß das Gewebe (3) aus einem elektrisch nicht leitenden Material, beispielsweise Kohlefasern, besteht in das mindestens ein elektrisch leitender Metallfaden und/oder ein Folienband (5) eingeflochten ist.Grinding wheel according to claim 1, characterized in that the fabric (3) consists of an electrically non-conductive material, for example carbon fibers, into which at least one electrically conductive metal thread and / or a foil strip (5) is braided. Schleifscheibe nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das in der Flachseite des Schleifkörpers (1) angeordnete Gewebe (4) weitmaschiger als ein im Schleifkörper (1) befindliches Armierungsgewebe (2) ist.Grinding wheel according to at least one of claims 1 to 4, characterized in that the fabric arranged in the flat side of the grinding body (1) (4) has a wider mesh than a reinforcing fabric (2) located in the grinding body (1). Schleifscheibe nach Anspruch 1, dadurch gekennzeichnet, daß an der Flachseite des Schleifkörpers (1) befindliche Gewebe (4) mit einem Haftverbesserer versehen ist.Grinding wheel according to claim 1, characterized in that the fabric (4) located on the flat side of the grinding body (1) is provided with an adhesion promoter. Vorrichtung zur Bestimmung des Abnutzungsgrades einer Schleifscheibe insbesondere Trennschleifscheibe mit einem Schleifkörper aus Schleifkorn, Bindemittel und vorzugsweise schleifaktiven und schleifinaktiven Füllstoffen, wobei der Schleifkörper mit mindestens einem verschleißenden Gewebe versehen ist, dadurch gekennzeichnet, daß das Gewebe (3), das an einer Flachseite des Schleifkörpers (1) oder innerhalb der Scheibenbreite in diesen eingelegt ist elektrisch leitende Metallfäden (4) aufweist und/oder daß mindestens ein elektrisch leitender Metallfaden (4) oder Folienband (5) in das Gewebe (3) eingewoben ist, wobei die elektrisch leitenden Metallfäden (4) bzw. Folienbänder (5) zumindestens teilweise an der Oberfläche des Schleifkörpers (1) liegen und dadurch, daß die Vorrichtung mit einem elektrischen Fühler versehen ist, der die Abnützung des oder der Metallfäden (4) bzw. Folienbänder (5) mißt.Device for determining the degree of wear of a grinding wheel, in particular a cutting wheel with a grinding body made of abrasive grain, binding agent and preferably grinding-active and grinding-inactive fillers, the grinding wheel being provided with at least one abrasive cloth, characterized in that the cloth (3) on a flat side of the grinding wheel (1) or within the width of the disc, there is electrically conductive metal threads (4) and / or that at least one electrically conductive metal thread (4) or foil strip (5) is woven into the fabric (3), the electrically conductive metal threads ( 4) or foil strips (5) are at least partially on the surface of the grinding wheel (1) and in that the device is provided with an electrical sensor which measures the wear of the metal thread (s) (4) or foil strips (5).
EP19910104483 1990-04-11 1991-03-22 Grinding wheel Withdrawn EP0451572A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT87190A AT396213B (en) 1990-04-11 1990-04-11 GRINDING WHEEL
AT871/90 1990-04-11

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EP0451572A2 true EP0451572A2 (en) 1991-10-16
EP0451572A3 EP0451572A3 (en) 1992-02-05

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003008151A1 (en) * 2001-07-20 2003-01-30 3M Innovative Properties Company Fixed abrasive articles with wear indicators
ITBS20090117A1 (en) * 2009-06-26 2010-12-27 Molemab S P A ABRASIVE WHEEL AND METHOD OF REALIZATION
DE102012002105A1 (en) * 2012-02-06 2013-08-08 Egon Evertz Kg (Gmbh & Co.) Grinding wheel, in particular for longitudinal or transverse grinding

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422940A1 (en) * 1974-05-11 1975-12-04 Waldrich Werkzeugmasch DEVICE FOR STOPPING THE INFEED MOVEMENT OF A ROTATING TOOL CARRIED BY A TOOL SPINDLE, IN PARTICULAR A GRINDING WHEEL

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2721771A (en) * 1970-04-09 1972-10-05 Norton Company Magnetic sheet material
AT337033B (en) * 1974-06-17 1977-06-10 Morex Ag FLEXIBLE ABRASIVE WITH ANTISTATIC PROPERTIES, IN PARTICULAR FOR ENDLESS ABRASIVE TAPES AND PROCESS FOR ITS MANUFACTURING

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422940A1 (en) * 1974-05-11 1975-12-04 Waldrich Werkzeugmasch DEVICE FOR STOPPING THE INFEED MOVEMENT OF A ROTATING TOOL CARRIED BY A TOOL SPINDLE, IN PARTICULAR A GRINDING WHEEL

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003008151A1 (en) * 2001-07-20 2003-01-30 3M Innovative Properties Company Fixed abrasive articles with wear indicators
ITBS20090117A1 (en) * 2009-06-26 2010-12-27 Molemab S P A ABRASIVE WHEEL AND METHOD OF REALIZATION
DE102012002105A1 (en) * 2012-02-06 2013-08-08 Egon Evertz Kg (Gmbh & Co.) Grinding wheel, in particular for longitudinal or transverse grinding

Also Published As

Publication number Publication date
EP0451572A3 (en) 1992-02-05
ATA87190A (en) 1992-11-15
AT396213B (en) 1993-07-26

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