EP0981421B1 - Grinder for grinding metal slitting saw blades - Google Patents

Grinder for grinding metal slitting saw blades Download PDF

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Publication number
EP0981421B1
EP0981421B1 EP98914783A EP98914783A EP0981421B1 EP 0981421 B1 EP0981421 B1 EP 0981421B1 EP 98914783 A EP98914783 A EP 98914783A EP 98914783 A EP98914783 A EP 98914783A EP 0981421 B1 EP0981421 B1 EP 0981421B1
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EP
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Prior art keywords
grinding wheel
wheel according
tool
grinding
mounting bore
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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.)
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EP98914783A
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German (de)
French (fr)
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EP0981421A1 (en
Inventor
Richard SCHÜLLER
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August Heinr Schmidt GmbH and Co KG Maschinenfabrik
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August Heinr Schmidt GmbH and Co KG Maschinenfabrik
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Priority claimed from DE19719971A external-priority patent/DE19719971A1/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

Definitions

  • the invention relates to a grinding wheel for processing of metal circular saw blades with higher speeds, such grinding wheels hard materials, such as e.g. Containing diamond or cubic boron nitride Have machining areas with which high cutting performance can be achieved.
  • the grinding wheels according to the invention different from those previously used Grinding wheels in particular in that the base body the grinding wheel at least one side in the radial outer area of the tool mounting hole, the conventional or also, as this from DE 296 08 590 is known, can be formed, a contour is available is in the at least one centering element can intervene positively. While grinding the grinding wheel and at least one centering element on the tool spindle of the grinding machine held non-positively.
  • a commonly used screw connection Find application but there is also Possibility of hydraulically, pneumatically operated To use piston cylinder units or a spring force, the latter especially for one automatic operation.
  • a flange-like extension over the normal thickness of the base body of the Grinding wheel protrudes, is formed on the at least one radially outer contact surface for the / the Centering element (s) is present on which the / Centering element (s) can support. Conveniently is / are the contact surface (s) opposite the Axis of rotation inclined.
  • the contour can also be circular Be web, with openings if necessary be symmetrically divided into individual segments can.
  • the centering element (s) is supported each on the radially outer surface of the web from.
  • contours can be improved in that at least one-sided beveled contact surfaces are on which the corresponding contact surfaces Support the centering element (s).
  • Bevels have the advantage of being larger Investment areas are available and secondly becomes the insertion or fitting of the centering elements when attaching the grinding wheel to the grinding machine relieved and adjustment errors if necessary during the insertion can be compensated and consequently the wear on the centering elements and the Base body of the grinding wheel can be reduced.
  • the depressions or openings can be more advantageous Way to be improved if this are flared outwards, to like this already for the beveled training certain surface areas of the grooves, flanges or Webs, the case is, especially when threading the Centering elements can be improved.
  • the second Centering element can be a separate component be that non-positively towards the flange the grinding machine drive spindle can.
  • the centering element be part of the piston or of the cylinder, depending on which of the two Elements for fastening the grinding wheel the drive spindle is used.
  • Contours are in shape below the axis of rotation A. of grooves 3 and 3 'shown, again on the right a groove 3 from the central axis B of the grinding wheel 1 formed with a rectangular or square cross section and is on the other side of the central axis B shown groove 3 'at least one beveled Contact surface for a not shown Centering element should have.
  • FIG. 1 further shows various options training, processing areas 5 and 5 ' a grinding wheel according to the invention, the hard materials contain cubic boron nitride or diamond.
  • FIG. 2 shows another example of the invention Grinding wheel 1 shown. It is the contour 7 in the radial direction of the tool holder bore 4 outer area a flange-like extension whose in turn radially outer edge contact surfaces 8th for one or two centering elements 6 (not shown) available. the contact surfaces 8 are opposite the axis of rotation A inclined at an angle of 15 °.
  • the tool mounting hole 4 is partially in designed to expand conically, where the cone forms an angle of 90 °.
  • the cone is advantageously dimensioned such that he up to at least the central axis B of the grinding wheel base ranges or extends beyond and the remaining area of the tool holder bore 4 is cylindrical is trained.
  • the tool mounting hole 4 can also be designed in this way be (not shown) that the conical Part enclosed by two cylindrical parts , which is due to the larger diameter of the conical Part adjacent cylindrical part a larger one Internal diameter than the opposite one has cylindrical part.
  • the centering element 6 can then be constructed accordingly and on the cone and the end face adjacent to the cone cylindrical part of the tool mounting hole 4 issue.
  • plane support surfaces 9 are radial to Tool mounting hole 4 outer area available, on which the centering element (s) (6) or a Clamping element 11 in the fixed position of the grinding wheel 1 come to the plant.
  • the cone can also in a form not shown formed on both sides of the grinding wheel 1 be, in which case two on both sides accordingly trained centering elements 6 are used can.
  • FIG. 3 the example according to FIG. 2 is more fixed Position on a drive spindle Grinding machine for circular saw blades shown.
  • FIG. 3 clearly shows how the grinding wheel 1 with its conical inner diameter the tool mounting hole 4, the support surface 9 and the contact surface 8 of the flange-like Contour 7 on the centering element 6 and aligned is held. Because of the large surface areas safe guidance even at relatively high speeds given. There are also relatively high frictional forces available that reduce the tension, the one with the clamping screw 10 or another Clamping element must be applied, enable what to extend the lifespan of at least the Centering elements 6 leads.
  • the centrifugal forces acting at high speeds are over the on the contact surface 8 of the contour 7 with the corresponding training of the centering element 6 its outer edge caught and largely compensated.
  • the centering element 6 is between its outer edge and the flared Outside diameter, i.e. in the area of on this side the grinding wheel 9 existing support surface 9, the opposite the support surface on the other side 9 is smaller, moved in. Thereby lies the inner outer edge of the centering element 6 on the Contact surface 8 and the retracted area on the Support surface 9 on.

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

Abstract

The invention relates to a grinding wheel for machining metal circular-saw blades at relatively high rotational speeds, which have machining areas which contain in particular hard materials, such as for example diamond or cubic boron nitride. The grinding wheels according to the invention are intended in particular to improve the centring at relatively high rotational speeds, and consequently to prevent true running problems as far as possible. The base body of the grinding wheel is of contoured design, at least on one side, in the radially outer area of a tool-mounting bore, and at least one centring element can be designed to engage in a formfitting manner in the correspondingly designed contours, so that the grinding wheel and a centring element on a tool spindle of a grinding machine are held together in a force-fitting manner.

Description

Die Erfindung betrifft eine Schleifscheibe zur Bearbeitung von Metallkreissägeblättern mit höheren Drehzahlen, wobei solche Schleifscheiben Hartstoffe, wie z.B. Diamant oder kubisches Bornitrid enthaltende Bearbeitungsbereiche aufweisen, mit denen hohe Zerspanungsleistungen erreicht werden können.The invention relates to a grinding wheel for processing of metal circular saw blades with higher speeds, such grinding wheels hard materials, such as e.g. Containing diamond or cubic boron nitride Have machining areas with which high cutting performance can be achieved.

Aus DE 296 08 590 sind Schleifscheiben für die Bearbeitung von Metallkreissägeblättern bekannt, bei denen die Zentrierung und Justierung auf einer Antriebswelle einer Schleifmaschine dadurch verbessert werden soll, daß die Werkzeugaufnahmebohrung, die in der Schleifscheibe ausgebildet ist, sich im Durchmesser einseitig erweitert.DE 296 08 590 describes grinding wheels for processing known from metal circular saw blades in which centering and adjustment on a drive shaft a grinding machine improved should be that the tool mounting hole that in the grinding wheel is formed, in diameter expanded on one side.

Schleifscheiben, deren Bearbeitungsbereiche kubisches Bornitrid- oder Diamantschleifkörper enthalten, ermöglichen jedoch eine sehr hohe Zerspanungsleistung, wenn die Schnittgeschwindigkeit und damit die Drehzahl der Schleifscheibe entsprechend höher eingestellt wird. Diese höheren Drehzahlen führen dazu, daß die Zentrierung, die durch die Ausbildung der Werkzeugaufnahmebohrung verbessert werden sollte, infolge der steigenden Fliehkräfte nachläßt.Grinding disks whose processing areas are cubic Contain boron nitride or diamond abrasives, allow however a very high cutting performance, if the cutting speed and therefore the speed the grinding wheel is set accordingly higher becomes. These higher speeds cause that centering by training the Tool mounting hole should be improved, decreases due to the increasing centrifugal forces.

Dies führt weiter dazu, daß Rundlauffehler, die auftreten und insbesondere die durch die Rundlauffehler bis in den Bearbeitungsbereich weiter geleiteten Schwingungen zu erhöhtem Verschleiß im Bearbeitungsbereich durch höheren Abtrag der Hartstoffe führen, so daß ein häufigeres Abrichten oder ein häufigerer Austausch der Schleifscheiben erforderlich ist. This further leads to runout errors that occur and especially those caused by the radial runout forwarded to the processing area Vibrations to increased wear in the machining area lead by higher removal of hard materials, so that more frequent dressing or more frequent Replacement of the grinding wheels is required.

Es ist daher Aufgabe der Erfindung, Schleifscheiben dahingehend zu verbessern, daß insbesondere bei höheren Drehzahlen die Zentrierung verbessert und demzufolge Rundlauffehler vermieden werden können.It is therefore an object of the invention to use grinding wheels to improve in that especially at higher Speeds improved the centering and consequently Concentricity errors can be avoided.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungsformen und Weiterbildungen der Erfindung ergeben sich bei Verwendung der in den untergeordneten Ansprüchen genannten Merkmale.According to the invention, this object is achieved by the features of claim 1 solved. Advantageous designs and further developments of the invention result when using the in the subordinate claims mentioned features.

Die erfindungsgemäßen Schleifscheiben unterscheiden sich von den bisher üblicherweise verwendeten Schleifscheiben insbesondere dadurch, daß der Grundkörper der Schleifscheibe zumindest einseitig im radial äußeren Bereich der Werkzeugaufnahmebohrung, die herkömmlich oder auch, wie dies aus DE 296 08 590 bekannt ist, ausgebildet sein kann, eine Kontur vorhanden ist, in die zumindest ein Zentrierelement formschlüssig eingreifen kann. Während des Schleifens wird dabei die Schleifscheibe und zumindest ein Zentrierelement an der Werkzeugspindel der Schleifmaschine kraftschlüssig gehalten. Hierfür kann beispielsweise eine üblicherweise verwendete Schraubverbindung Anwendung finden, es besteht aber auch die Möglichkeit, hydraulisch, pneumatisch betätigbare Kolbenzylindereinheiten oder eine Federkraft einzusetzen, wobei sich letztere insbesondere für einen automatischen Betrieb eignen.Differentiate the grinding wheels according to the invention different from those previously used Grinding wheels in particular in that the base body the grinding wheel at least one side in the radial outer area of the tool mounting hole, the conventional or also, as this from DE 296 08 590 is known, can be formed, a contour is available is in the at least one centering element can intervene positively. While grinding the grinding wheel and at least one centering element on the tool spindle of the grinding machine held non-positively. For example a commonly used screw connection Find application, but there is also Possibility of hydraulically, pneumatically operated To use piston cylinder units or a spring force, the latter especially for one automatic operation.

Besonders günstig ist es, die Kontur an beiden Seiten des Grundkörpers der Schleifscheibe auszubilden und dabei symmetrische Verhältnisse einzuhalten.It is particularly favorable to have the contour on both sides of the base body of the grinding wheel and maintaining symmetrical relationships.

Bei der Konturierung ist lediglich zu beachten, daß zumindest einseitig eine Anlagefläche für das bzw. die Zentrierelement(e) vorhanden ist, mit der sich eine in Richtung auf die Drehachse der Schleifscheibe gerichtete Fläche des bzw. der Zentrierelement(e) abstützt und die Zentrierwirkung bei höheren Drehzahlen infolge der Fliehkräfte verbessert werden kann.When contouring, you only need to note that at least on one side a contact surface for the or the centering element (s) is present with which one towards the axis of rotation of the grinding wheel directed surface of the centering element (s) supports and the centering effect at higher speeds can be improved due to the centrifugal forces.

Für die Ausbildung der Kontur(en) bestehen mehrere Möglichkeiten. Es kann einmal an einer oder beiden Seiten des Grundkörpers der Schleifscheibe eine kreisförmige Nut eingearbeitet sein, in die entsprechende Stege des bzw. der Zentrierelemente formschlüssig und nahezu spielfrei eingreifen, wenn die Schleifscheibe auf der Antriebsspindel der Schleifmaschine befestigt wird. Günstig ist es dabei, wenn die in die Nuten eingreifenden stegartig ausgebildeten Bereiche des bzw. der Zentrierelemente(s) zumindest an ihrem Innendurchmesser ballig ausgebildet sind, so daß keine vollflächige Anlage an der entsprechenden Fläche der Nut erfolgt und das Einführen dadurch erleichtert wird.There are several for the formation of the contour (s) Possibilities. It can happen on one or both Sides of the main body of the grinding wheel circular groove be incorporated into the corresponding Crosspieces of the centering element or elements and intervene almost without play if the Grinding wheel on the drive spindle of the grinding machine is attached. It is beneficial if the web-like trained engaging in the grooves Areas of the centering element (s) at least are spherical on their inner diameter, so that no full-area system on the corresponding Surface of the groove takes place and the insertion is thereby facilitated becomes.

Eine andere Möglichkeit zur Ausbildung der Kontur(en) besteht darin, daß eine flanschartige Erweiterung, die über die normale Dicke des Grundkörpers der Schleifscheibe herausragt, ausgebildet ist, an der zumindest eine radial äußere Anlagefläche für das/die Zentrierelement(e) vorhanden ist, an der sich das/die Zentrierelement(e) abstützen kann/können. Günstigerweise ist/sind die Anlagefläche(n) gegenüber der Drehachse geneigt.Another way of forming the contour (s) is that a flange-like extension, over the normal thickness of the base body of the Grinding wheel protrudes, is formed on the at least one radially outer contact surface for the / the Centering element (s) is present on which the / Centering element (s) can support. Conveniently is / are the contact surface (s) opposite the Axis of rotation inclined.

Die Kontur kann aber auch ein kreisförmig umlaufender Steg sein, der gegebenenfalls mit Durchbrechungen symmetrisch in einzelne Segmente unterteilt sein kann. Dabei stützt sich das bzw. die Zentrierelement(e) jeweils an der radial äußeren Fläche des Steges ab.The contour can also be circular Be web, with openings if necessary be symmetrically divided into individual segments can. The centering element (s) is supported each on the radially outer surface of the web from.

Die möglichen Beispiele für die Ausbildung der Konturen können dahingehend verbessert werden, daß zumindest einseitig abgeschrägte Anlageflächen ausgebildet sind, an denen sich die entsprechenden Anlageflächen des bzw. der Zentrierelemente(s) abstützen. Abschrägungen haben den Vorteil, daß einmal größere Anlageflächen zur Verfügung stehen und zum anderen wird das Einführen bzw. Einpassen der Zentrierelemente beim Befestigen der Schleifscheibe an der Schleifmaschine erleichtert und gegebenenfalls Justagefehler während des Einführens können kompensiert und demzufolge der Verschleiß an den Zentrierelementen und dem Grundkörper der Schleifscheibe verringert werden.The possible examples for the formation of the contours can be improved in that at least one-sided beveled contact surfaces are on which the corresponding contact surfaces Support the centering element (s). Bevels have the advantage of being larger Investment areas are available and secondly becomes the insertion or fitting of the centering elements when attaching the grinding wheel to the grinding machine relieved and adjustment errors if necessary during the insertion can be compensated and consequently the wear on the centering elements and the Base body of the grinding wheel can be reduced.

Die bisher beschriebenen Möglichkeiten für die Ausbildung der Konturen können relativ einfach durch spanende Bearbeitung für den Fall der Nuten und der flanschartigen Ausbildung erreicht werden, es besteht aber auch die Möglichkeit, den Grundkörper der Schleifscheibe durch bekannte Gießverfahren in der gewünschten Form auszubilden.The options for training described so far of the contours can be made relatively easily machining in the case of grooves and flange-like training can be achieved, there is but also the possibility of the basic body of the Grinding wheel by known casting processes in the the desired shape.

Die Verbesserung der Zentrierung für die in Rede stehenden Schleifscheiben kann weiter dadurch erreicht werden, daß die Konturen in Form von Durchbrechungen oder Vertiefungen, die im bzw. durch den Grundkörper der Schleifscheibe ausgebildet sind oder solche Vertiefungen bzw. Durchbrechungen zusätzlich vorhanden isnd. Dabei sind mindestens zwei sich auf einer Achse in radialer Richtung symmetrisch gegenüberliegende Durchbrechungen bzw. Vertiefungen erforderlich, um die auftretenden Fliehkräfte zu kompensieren und unerwünschte Unwuchten zu vermeiden.Improving centering for those in question Grinding wheels can still be reached that the contours in the form of openings or depressions in or through the base body the grinding wheel are formed or such depressions or breakthroughs also available isnd. At least two are on one axis in the radial direction symmetrically opposite Openings or recesses required to to compensate for the centrifugal forces and undesirable Avoid unbalance.

Die Vertiefungen bzw. Durchbrechungen können vorteilhafter Weise dadurch verbessert werden, wenn diese sich nach außen konisch erweiternd ausgebildet sind, um wie dies bereits für die abgeschrägte Ausbildung bestimmter Flächenbereiche der Nuten, Flansche oder Stege, der Fall ist, insbesondere beim Einfädeln der Zentrierelemente verbessert werden.The depressions or openings can be more advantageous Way to be improved if this are flared outwards, to like this already for the beveled training certain surface areas of the grooves, flanges or Webs, the case is, especially when threading the Centering elements can be improved.

Günstig ist es, die entsprechenden Zentrierelemente einmal am Flansch der Antriebsspindel der Schleifmaschine stationär vorzusehen, und auf der anderen Seite der Schleifscheibe ein zusätzliches Zentrierelement, das bevorzugt entsprechend ausgebildet ist, kraftschlüssig in der Kontur und der Werkzeugaufnahmebohrung der Schleifscheibe zu halten. Das zweite Zentrierelement kann dabei ein gesondertes Bauteil sein, das kraftschlüssig in Richtung auf den Flansch der Antriebsspindel der Schleifmaschine gehalten werden kann.It is favorable to use the corresponding centering elements once on the flange of the drive spindle of the grinding machine provided stationary, and on the other hand the grinding wheel an additional centering element, which is preferably designed accordingly, non-positive in the contour and the tool holder bore to hold the grinding wheel. The second Centering element can be a separate component be that non-positively towards the flange the grinding machine drive spindle can.

Wird die Befestigung der Schleifscheibe an der Antriebsspindel mit einer Schraubverbindung realisiert, ist es günstig, die Schraube und das Zentrierelement miteinander zu verbinden, so daß die Handhabung vereinfacht wird. Dabei ist es besonders günstig, wenn die Verbindung so ausgeführt wird, daß die Drehung der Schraube unabhängig von der Bewegung des Zentrierelementes erfolgen kann, also ein Mitdrehen des Zentrierelementes verhindert wird.Will attach the grinding wheel to the drive spindle realized with a screw connection, it is convenient to the screw and the centering element to connect with each other, so that the handling is simplified becomes. It is particularly beneficial if the connection is made so that the rotation the screw regardless of the movement of the Centering element can take place, so a turning the centering element is prevented.

Wird dagegen eine Kolben-Zylinder-Anordnung gewählt, kann das Zentrierelement Bestandteil des Kolbens bzw. des Zylinders sein, je nachdem, welcher der beiden Elemente für die Befestigung der Schleifscheibe auf der Antriebsspindel verwendet wird.If, on the other hand, a piston-cylinder arrangement is selected, can the centering element be part of the piston or of the cylinder, depending on which of the two Elements for fastening the grinding wheel the drive spindle is used.

Neben der verbesserten Zentrierwirkung bei hohen Drehzahlen, die durch die verbesserte Abstützung der Schleifscheibe in radialer Richtung, die durch die Fliehkraftwirkung noch unterstützt wird, wobei zu berücksichtigen ist, daß die Fliehkraft sich mit dem Quadrat der Geschwindigkeit erhöht, verbessert, kann auch ein höheres Drehmoment durch die Vergrößerung der sich in reibschlüssiger Verbindung befindenden Flächen, übertragen werden.In addition to the improved centering effect at high Speeds by the improved support of the Grinding wheel in the radial direction by the Centrifugal force is still supported, too take into account that the centrifugal force with the Square of speed increased, improved, can also a higher torque due to the enlargement the one in frictional connection Areas to be transferred.

Nachfolgend soll die Erfindung an Ausführungsbeispielen näher beschrieben werden.In the following, the invention is to be illustrated using exemplary embodiments are described in more detail.

Dabei zeigen:

Figur 1
mehrere Möglichkeiten für die Ausbildung einer erfindungsgemäßen Schleifscheibe;
Figur 2
ein Beispiel einer erfindungsgemäßen Schleifscheibe allein und
Figur 3
das in Figur 2 gezeigte Beispiel in zentrierter, gehaltener Stellung.
Show:
Figure 1
several options for the formation of a grinding wheel according to the invention;
Figure 2
an example of a grinding wheel according to the invention alone and
Figure 3
the example shown in Figure 2 in a centered, held position.

In der Figur 1 sind dabei mehrere Möglichkeiten für Konturierungen, die erfindungsgemäß verwendet werden können, dargestellt.In Figure 1 there are several options for Contours that are used according to the invention can, shown.

An der Schleifscheibe 1 sind oberhalb der Drehachse A Konturierungen als Stege 2 und 2' dargestellt, wobei der Steg 2 rechts von der Mittelachse B der Schleifscheibe 1 nahezu symmetrisch mit einem rechteckigen oder quadratischem Querschnitt ausgebildet ist, der zumindest bei spanender Herstellung des entsprechenden Grundkörpers einer Schleifscheibe 1 kostengünstiger hergestellt werden kann, als dies für den links von der Mittelachse B dargestellten Steg 2' mit zumindest einer abgeschrägten oder balligen Anlagefläche für ein Zentrierelement der Fall ist. Bei dem gezeigten Beispiel ist die radial innenliegende Anlagefläche des Steges 2' abgeschrägt, es besteht aber auch die Möglichkeit, die radial außen liegende Anlagefläche dieses Steges oder auch beide Anlageflächen abgeschrägt oder ballig auszuführen.On the grinding wheel 1 are above the axis of rotation A Contours shown as webs 2 and 2 ', wherein the web 2 to the right of the center axis B of the grinding wheel 1 almost symmetrical with a rectangular or square cross section is formed, the at least when the corresponding one is machined Base body of a grinding wheel 1 cheaper can be made than this for the left web 2 'shown by the central axis B with at least a bevelled or spherical contact surface is the case for a centering element. In which The example shown is the radially inner contact surface of the web 2 'beveled, but there is also the possibility of the radially outer contact surface of this web or both contact surfaces beveled or crowned.

Unterhalb der Drehachse A sind Konturierungen in Form von Nuten 3 und 3' dargestellt, wobei wiederum rechts von der Mittelachse B der Schleifscheibe 1 eine Nut 3 mit rechteckigem bzw. quadratischem Querschnitt ausgebildet ist und die auf der anderen Seite der Mittelachse B dargestellte Nut 3' zumindest eine abgeschrägte Anlagefläche für ein nicht dargestelltes Zentrierelement aufweisen sollte.Contours are in shape below the axis of rotation A. of grooves 3 and 3 'shown, again on the right a groove 3 from the central axis B of the grinding wheel 1 formed with a rectangular or square cross section and is on the other side of the central axis B shown groove 3 'at least one beveled Contact surface for a not shown Centering element should have.

Die Ausbildung der Konturierung im radial äußeren Bereich der Werkzeugaufnahmebohrung 4, die unterhalb der Drehachse A in einfacher Form und oberhalb der Drehachse A in abgeschrägter Form, wie dies aus DE 296 08 590 bekannt ist, ausgeführt worden ist, sollte jedoch immer in bezug auf die Achsen A und B symmetrisch erfolgen, d.h. an einer Schleifscheibe 1 sollten Konturierungen in Form von Stegen 2 oder 2' oder Nuten 3 oder 3' vorgesehen sein, um das Auswuchten der Schleifscheibe 1 zu erleichtern.The formation of the contour in the radially outer Area of the tool mounting hole 4, which is below the axis of rotation A in simple form and above the Axis of rotation A in a beveled form, as this from DE 296 08 590 is known, should have been executed however always symmetrical with respect to the A and B axes take place, i.e. on a grinding wheel 1 should Contours in the form of webs 2 or 2 'or Grooves 3 or 3 'may be provided for balancing to facilitate the grinding wheel 1.

Ähnlich wie die Nuten 3 oder 3' können auch Vertiefungen oder Durchbrechungen, die sich jedoch paarweise gegenüberliegend angeordnet sein sollten, im Grundkörper der Schleifscheibe ausgebildet sein, in die entsprechend ausgeformte Bereiche der Zentrierelemente eingreifen könnten.Similar to the grooves 3 or 3 'can also depressions or breakthroughs, however, in pairs should be arranged opposite each other Base body of the grinding wheel be formed in the correspondingly shaped areas of the centering elements could intervene.

Die Figur 1 zeigt weiter verschiedene Möglichkeiten, der Ausbildung, der Bearbeitungsbereiche 5 und 5' einer erfindungsgemäßen Schleifscheibe, die die Hartstoffe kubisches Bornitrid oder Diamant enthalten.FIG. 1 further shows various options training, processing areas 5 and 5 ' a grinding wheel according to the invention, the hard materials contain cubic boron nitride or diamond.

In der Figur 2 ist ein weiteres Beispiel der erfindungsgemäßen Schleifscheibe 1 dargestellt. Dabei ist die Kontur 7 im radial zur Werkzeugaufnahmebohrung 4 äußeren Bereich eine flanschartige Erweiterung an deren wiederum radial äußeren Rand Anlageflächen 8 für ein bzw. zwei Zentrierelemente 6 (nicht dargestellt) vorhanden sind. die Anlageflächen 8 sind gegenüber der Drehachse A in einem Winkel von 15° geneigt.FIG. 2 shows another example of the invention Grinding wheel 1 shown. It is the contour 7 in the radial direction of the tool holder bore 4 outer area a flange-like extension whose in turn radially outer edge contact surfaces 8th for one or two centering elements 6 (not shown) available. the contact surfaces 8 are opposite the axis of rotation A inclined at an angle of 15 °.

Die Werkzeugaufnahmebohrung 4 ist teilweise sich in ihrem Innendurchmesser konisch erweiternd ausgebildet, wobei hier der Konus einen Winkel von 90° bildet. Der Konus ist vorteilhaft so dimensioniert, daß er bis mindestens zur Mittelachse B des Schleifscheibengrundkörpers reicht oder darüber hinausragt und der übrige Bereich der Werkzeugaufnahmebohrung 4 zylindrisch ausgebildet ist.The tool mounting hole 4 is partially in designed to expand conically, where the cone forms an angle of 90 °. The cone is advantageously dimensioned such that he up to at least the central axis B of the grinding wheel base ranges or extends beyond and the remaining area of the tool holder bore 4 is cylindrical is trained.

Die Werkzeugaufnahmebohrung 4 kann aber auch so ausgebildet sein (nicht dargestellt), daß der konische Teil von zwei zylindrischen Teilen eingeschlossen ist, wobei der an dem größeren Durchmesser des konischen Teiles angrenzende zylindrische Teil einen größeren Innendruchmesser als der gegenüberliegende andere zylindrische Teil hat. Das Zentrierelement 6 kann dann entsprechend konstruiert sein und am Konus und der an dem Konus angrenzenden Stirnfläche dieses zylindrischen Teiles der Werkzeugaufnahmebohrung 4 anliegen.The tool mounting hole 4 can also be designed in this way be (not shown) that the conical Part enclosed by two cylindrical parts , which is due to the larger diameter of the conical Part adjacent cylindrical part a larger one Internal diameter than the opposite one has cylindrical part. The centering element 6 can then be constructed accordingly and on the cone and the end face adjacent to the cone cylindrical part of the tool mounting hole 4 issue.

Außerdem sind plane Stützflächen 9 im radial zur Werkzeugaufnahmebohrung 4 äußeren Bereich vorhanden, an denen das bzw. die Zentrierelement(e) (6) oder ein Spannelement 11 in fixierter Stellung der Schleifscheibe 1 zur Anlage kommen.In addition, plane support surfaces 9 are radial to Tool mounting hole 4 outer area available, on which the centering element (s) (6) or a Clamping element 11 in the fixed position of the grinding wheel 1 come to the plant.

Der Konus kann aber auch in nicht dargestellter Form an beiden Seiten der Schleifscheibe 1 ausgebildet sein, wobei in diesem Fall beidseitig zwei entsprechend ausgebildete Zentrierelemente 6 verwendet werden können.The cone can also in a form not shown formed on both sides of the grinding wheel 1 be, in which case two on both sides accordingly trained centering elements 6 are used can.

In der Figur 3 ist das Beispiel nach Figur 2 in fixierter Stellung an einer Antriebsspindel einer Schleifmaschine für Metallkreissägeblätter dargestellt.In FIG. 3 the example according to FIG. 2 is more fixed Position on a drive spindle Grinding machine for circular saw blades shown.

Dabei ist ein Zentrierelement 6 mit der Antriebswelle der Schleifmaschine verbunden. Die Schleifscheibe 1 wird mit einer Spannschraube 10 gegen das Zentrierelement 6 kraftschlüssig gehalten und bei der Befestigung gleichzeitig die Schleifscheibe 1 zentriert und fixiert. In Figur 3 ist deutlich erkennbar, wie sich die Schleifscheibe 1 mit ihrem konischen Innendurchmesser der Werkzeugaufnahmebohrung 4, der Stützfläche 9 und der Anlagefläche 8 der flanschartigen Kontur 7 am Zentrierelement 6 anlegt und ausgerichtet gehalten wird. Durch die großen Flächenbereiche ist eine sichere Führung auch bei relativ hohen Drehzahlen gegeben. Außerdem stehen relativ hohe Reibkräfte zur Verfügung, die die Verringerung der Spannkraft, die mit der Spannschraube 10 oder einem anderen Spannelement aufgebracht werden muß, ermöglichen, was zur Verlängerung der Lebensdauer von zumindest der Zentrierelemente 6 führt.There is a centering element 6 with the drive shaft connected to the grinding machine. The grinding wheel 1 is with a clamping screw 10 against the centering element 6 held non-positively and during attachment centered the grinding wheel 1 at the same time and fixed. FIG. 3 clearly shows how the grinding wheel 1 with its conical inner diameter the tool mounting hole 4, the support surface 9 and the contact surface 8 of the flange-like Contour 7 on the centering element 6 and aligned is held. Because of the large surface areas safe guidance even at relatively high speeds given. There are also relatively high frictional forces available that reduce the tension, the one with the clamping screw 10 or another Clamping element must be applied, enable what to extend the lifespan of at least the Centering elements 6 leads.

Die bei hohen Drehzahlen wirkenden Fliehkräfte werden über den an der Anlagefläche 8 der Kontur 7 mit der entsprechenden Ausbildung des Zentrierelementes 6 an dessen äußeren Rand gefangen und weitestgehend kompensiert. Hierfür ist das Zentrierlement 6 zwischen seinem äußeren Rand und dem sich konisch erweiternden Außendurchmesser, also im Bereich der an dieser Seite der Schleifscheibe 9 vorhandenen Stützfläche 9, die gegenüber der an der anderen Seite vorhandenen Stützfläche 9 kleiner ist, eingezogen. Dadurch liegt der innere äußere Rand des Zentrierelementes 6 an der Anlagefläche 8 und der eingezogene Bereich an der Stützfläche 9 an.The centrifugal forces acting at high speeds are over the on the contact surface 8 of the contour 7 with the corresponding training of the centering element 6 its outer edge caught and largely compensated. For this, the centering element 6 is between its outer edge and the flared Outside diameter, i.e. in the area of on this side the grinding wheel 9 existing support surface 9, the opposite the support surface on the other side 9 is smaller, moved in. Thereby lies the inner outer edge of the centering element 6 on the Contact surface 8 and the retracted area on the Support surface 9 on.

Claims (17)

  1. Grinding wheel for machining metal circular-saw blades, which at least in its radially outer area, at a distance from a tool-mounting bore, has a machining area which is provided with an abrasive coating, characterized in that the base body of the grinding wheel (1), at least on one side, has an additional contour (2, 2', 3, 3', 7) at a radial distance from the tool-mounting bore (4), for the form-fitting engagement of a centring element (6), the external contour of which is matched to the internal contour of the tool-mounting bore (4).
  2. Grinding wheel according to Claim 1, characterized in that the tool-mounting bore (4) is designed with an internal diameter which widens on at least one side.
  3. Grinding wheel according to Claim 1 or 2, characterized in that the contour (2, 2', 3, 3', 7)is formed on both sides of the grinding wheel (1) .
  4. Grinding wheel according to one of Claims 1 to 3, characterized in that the contour (7) is a flange-like widening beyond the thickness of the grinding-wheel base body, which widening has at least one radially outer bearing surface (8) for a centring element (6).
  5. Grinding wheel according to one of Claims 1 to 4, characterized in that the bearing surface(s) (8) is/are bevelled with respect to the axis of rotation (A) of the grinding wheel (1).
  6. Grinding wheel according to one of Claims 1 to 5, characterized in that planar support surfaces (9), which are directed perpendicular to the axis of rotation (A), are provided between the bearing surface(s) (8) and tool-mounting bore (4).
  7. Grinding wheel according to one of Claims 1, 2, 3 or 5, characterized in that the contour is a groove (3, 3') of circular design in the grinding-wheel base body.
  8. Grinding wheel according to one of Claims 1, 2, 3 or 5, characterized in that the contour is a web (2, 2') which runs in the shape of a circle.
  9. Grinding wheel according to Claim 7 or 8, characterized in that the radially outer bearing surfaces of the web (2') and the radially inner bearing surfaces of the groove (3') are bevelled with respect to the axis of rotation (A).
  10. Grinding wheel according to one of Claims 1 to 9, characterized in that the flange-like widening (7), the groove (3') or the web (2') has, on at least one side, a convex bearing surface against which the centring element(s) (6) is/are supported.
  11. Grinding wheel according to Claim 1, 2 or 3, characterized in that at least two apertures or recesses, which lie symmetrically opposite one another in the radial direction on a single axis, are formed in the base body of the grinding wheel (1) .
  12. Grinding wheel according to Claim 11, characterized in that the recesses or apertures are designed to widen conically outwards.
  13. Grinding wheel according to one of Claims 1 to 12, characterized in that the diameter of the tool-mounting bore (4) tapers from one side of the grinding wheel (1), and the remaining part of the tool-mounting bore (4) is of cylindrical design.
  14. Grinding wheel according to Claim 13, characterized in that the conically tapering part of the tool-mounting bore (4) is designed to extend at least as far as the centre of the grinding-wheel base body.
  15. Grinding wheel according to one of Claims 1 to 14, characterized in that the conically tapering part of the tool-mounting bore (4) is surrounded on both sides by cylindrical parts of different internal diameters.
  16. Grinding wheel according to one of Claims 1 to 15, characterized in that the conical part of the tool-mounting bore (4) and of the centring element (6) are formed at an angle of 90°.
  17. Grinding wheel according to one of Claims 1 to 16, characterized in that the bearing surfaces (8) are inclined at an angle of 15° with respect to the axis of rotation (A) of the grinding wheel (1).
EP98914783A 1997-05-13 1998-02-17 Grinder for grinding metal slitting saw blades Expired - Lifetime EP0981421B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19719971 1997-05-13
DE19719971A DE19719971A1 (en) 1997-05-13 1997-05-13 Grinding disc for polishing circular metal saw blades
DE29715683U DE29715683U1 (en) 1997-05-13 1997-09-01 Grinding wheel for processing metal circular saw blades
DE29715683U 1997-09-01
PCT/DE1998/000484 WO1998051447A1 (en) 1997-05-13 1998-02-17 Grinder for grinding metal slitting saw blades

Publications (2)

Publication Number Publication Date
EP0981421A1 EP0981421A1 (en) 2000-03-01
EP0981421B1 true EP0981421B1 (en) 2000-10-18

Family

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Application Number Title Priority Date Filing Date
EP98914783A Expired - Lifetime EP0981421B1 (en) 1997-05-13 1998-02-17 Grinder for grinding metal slitting saw blades

Country Status (5)

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US (1) US6206766B1 (en)
EP (1) EP0981421B1 (en)
AT (1) ATE197008T1 (en)
ES (1) ES2142298T3 (en)
WO (1) WO1998051447A1 (en)

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Publication number Priority date Publication date Assignee Title
ATE259277T1 (en) 1998-07-31 2004-02-15 Saint Gobain Abrasives Inc ROTATING DRESSING ROLLER WITH SOLDERED DIAMOND LAYER
JP2005313310A (en) * 2004-03-31 2005-11-10 Mitsubishi Materials Corp Cmp conditioner
DE202006013890U1 (en) * 2006-09-01 2006-11-16 C. & E. Fein Gmbh Tool for cutting processes comprises a working plate having a fixing region with a fixing opening for fixing to a driveshaft of a drive, especially an oscillating drive
DE102007039367B4 (en) * 2006-09-01 2019-12-19 C. & E. Fein Gmbh tool attachment
JP5954119B2 (en) * 2012-10-31 2016-07-20 日本精工株式会社 Grinding wheel centering method in screw grinder and measuring device for centering

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DE29608590U1 (en) * 1996-05-14 1996-07-11 August Heinr Schmidt Gmbh & Co Grinding wheel for machining circular metal saw blades

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DE29608590U1 (en) * 1996-05-14 1996-07-11 August Heinr Schmidt Gmbh & Co Grinding wheel for machining circular metal saw blades

Also Published As

Publication number Publication date
US6206766B1 (en) 2001-03-27
WO1998051447A1 (en) 1998-11-19
ES2142298T1 (en) 2000-04-16
ATE197008T1 (en) 2000-11-15
EP0981421A1 (en) 2000-03-01
ES2142298T3 (en) 2001-02-01

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