EP1749618B1 - Wheel for cutting-off or grinding - Google Patents

Wheel for cutting-off or grinding Download PDF

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Publication number
EP1749618B1
EP1749618B1 EP20060117648 EP06117648A EP1749618B1 EP 1749618 B1 EP1749618 B1 EP 1749618B1 EP 20060117648 EP20060117648 EP 20060117648 EP 06117648 A EP06117648 A EP 06117648A EP 1749618 B1 EP1749618 B1 EP 1749618B1
Authority
EP
European Patent Office
Prior art keywords
cutting
countersink
hole
grinding disc
disc according
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 - Fee Related
Application number
EP20060117648
Other languages
German (de)
French (fr)
Other versions
EP1749618A1 (en
Inventor
Gerhard Liemke
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.)
KERN-DEUDIAM DIAMANTWERKZEUGE UND MASCHINEN GMBH
Original Assignee
KERN-DEUDIAM Diamantwerkzeuge und Maschinen GmbH
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Publication date
Application filed by KERN-DEUDIAM Diamantwerkzeuge und Maschinen GmbH filed Critical KERN-DEUDIAM Diamantwerkzeuge und Maschinen GmbH
Publication of EP1749618A1 publication Critical patent/EP1749618A1/en
Application granted granted Critical
Publication of EP1749618B1 publication Critical patent/EP1749618B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/121—Circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
    • 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
    • B24D5/123—Cut-off wheels having different cutting segments

Definitions

  • the present invention relates to a cutting or grinding wheel according to the preamble of claim 1.
  • a cutting or grinding wheel is made US Pat. No. 2,990,828 known.
  • Such cutting or grinding wheels are used to process, for example, stone or concrete, in particular to separate.
  • the cutting teeth which are preferably distributed uniformly over the circumference in the same shape and size, are covered with diamond segments which form a cutting edge.
  • Two cutting teeth are separated by a radial, slot-shaped notch, which opens into a through hole, are discharged through the cooling water and / or cuttings.
  • This through-hole may have an equal or larger diameter than the subsequent notch.
  • these through holes serve to reduce stresses that occur during operation of the separating or grinding wheel, in particular by so-called micro-strokes.
  • the present invention is therefore based on the object to develop a separating or grinding wheel of the generic type so that their life increases and thus the operating costs are reduced.
  • the two, a through hole bounding reductions are the same, that is, both in terms of their sinking angle as well as their sinking depth.
  • the latter can be chosen so that forms a bridge between the two subsidences. It is also conceivable a sharp-edged training, which then results when a reduction is performed directly to the other reduction. In any case, an optimization of the force department is achieved with the exclusion of cracking.
  • the new cutting and grinding wheel is characterized by a much longer compared to a state of the art, in which then the wear of the cutting segments is the determining criterion.
  • a separating or grinding wheel which comprises a circular blade 1, preferably made of sheet steel, at the peripheral edge of a plurality of cutting teeth 2 are arranged, which are the same shape and dimension and uniformly distributed over the peripheral edge.
  • Each cutting tooth 2 is equipped with diamond segments 5, which form a cutting edge in their entirety.
  • a radially extending, slot-shaped notch 3 is provided, which widens outwardly in the region of the diamond segments 5 and, on the other hand, opens into a through-bore 4, which is introduced into the blade 1.
  • the diameter of the through-holes 4 is greater than the width of the adjoining notches 3.
  • Each through hole 4 has on both sides of a countersink 6, which is particularly evident in the FIG. 2 is recognizable.
  • the mirror-symmetrical countersinks 6, relative to the center axis of the through hole 4 extend at an angle of 45 °, so that the two opposing bevels of a countersink 6 form an angle of 90 °.
  • other included angle sizes for example 120 ° or 60 °, are also conceivable.
  • the two opposing counterbores 6 are inserted the same depth and dimensioned in depth so that a web 7 forms between them, which defines the clear diameter of the through hole 4.
  • a bridge 7 can also be formed a sharp edge when a reduction 6 is guided to the beginning of the opposite countersink 6.
  • transition region of each reduction 6 to the associated outer side of the sheet 1 may be formed edged or slightly rounded, as required.

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

Description

Die vorliegende Erfindung betrifft eine Trenn- oder Schleifscheibe entsprechend dem Oberbegriff des Anspruchs 1. Eine solche Trenn- oder Schleifscheibe ist aus US 2 990 828 A bekannt.The present invention relates to a cutting or grinding wheel according to the preamble of claim 1. Such a cutting or grinding wheel is made US Pat. No. 2,990,828 known.

Derartige Trenn- oder Schleifscheiben werden eingesetzt, um beispielsweise Stein oder Beton zu bearbeiten, insbesondere zu trennen.Such cutting or grinding wheels are used to process, for example, stone or concrete, in particular to separate.

Dabei sind die Schneidzähne, die vorzugsweise in gleicher Form und Größe gleichmäßig über den Umfang verteilt sind, mit Diamantsegmenten besetzt, die eine Schneidkante bilden.In this case, the cutting teeth, which are preferably distributed uniformly over the circumference in the same shape and size, are covered with diamond segments which form a cutting edge.

Jeweils zwei Schneidzähne werden durch eine radiale, schlitzförmige Einkerbung getrennt, die in ein Durchgangsloch mündet, durch das Kühlwasser und/oder Bohrklein abgeführt werden. Dieses Durchgangsloch kann einen gleichgroßen oder einen größeren Durchmesser aufweisen als die sich anschließende Einkerbung.Two cutting teeth are separated by a radial, slot-shaped notch, which opens into a through hole, are discharged through the cooling water and / or cuttings. This through-hole may have an equal or larger diameter than the subsequent notch.

Darüber hinaus dienen diese Durchgangslöcher zur Reduzierung von Spannungen, wie sie beim Betrieb der Trenn- oder Schleifscheibe insbesondere durch sogenannte Mikroschläge auftreten.In addition, these through holes serve to reduce stresses that occur during operation of the separating or grinding wheel, in particular by so-called micro-strokes.

Diese Spannungen führen zu Materialrissen in dem einen Träger für die Diamantsegmente bildenden Blatt, das üblicherweise aus Stahl besteht.These stresses lead to material cracks in the sheet forming a support for the diamond segments, which is usually made of steel.

Allerdings sind die bekannten Durchgangslöcher, deren beidseitiger Rand flacheben mit dem Blatt verlaufen, nicht geeignet dauerhaft eine solche Rissbildung zu verhindern.However, the known through holes whose two-sided edge are flat with the sheet are not suitable for preventing such cracking permanently.

Es ist deshalb schon versucht worden, diese Durchgangslöcher in ihrer Querschnittsform zu verändern, beispielsweise als Rechteck auszubilden mit gerundeten Ecken. Abgesehen von den hohen Fertigungskosten, die mit der Einbringung eines solchen rechteckigen Durchgangsloches verbunden sind, ist auch durch diese Formgebung eine befriedigende Reduzierung oder gar ein Ausschluss von Rissbildungen nicht gewährleistet.It has therefore already been tried to change these through holes in their cross-sectional shape, for example, form a rectangle with rounded corners. Apart from the high production costs, which are associated with the introduction of such a rectangular through hole, a satisfactory reduction or even exclusion of cracking is not guaranteed by this design.

Aufgrund der geschilderten Probleme ist die Standzeit der bekannten Trenn- oder Schleifscheiben relativ gering, was naturgemäß einer optimalen wirtschaftlichen Verwendung entgegensteht. Beklagenswert ist dieser Umstand insbesondere auch deshalb, weil die die Schneidkante bildenden Diamantsegmente eine wesentlich höhere Standzeit besitzen, das heißt, ein die Einsatzfähigkeit der Trenn- oder Schleifscheibe beeinträchtigender Verschleiß der Diamantsegmente tritt erst nach einer wesentlich längeren Gebrauchsdauer ein.Due to the problems described the service life of the known cutting or grinding wheels is relatively low, which naturally precludes optimal economic use. This circumstance is particularly deplorable because the diamond segments forming the cutting edge have a significantly longer service life, that is to say that wear of the diamond segments which impairs the usability of the separating or grinding wheel only occurs after a considerably longer service life.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Trenn- oder Schleifscheibe der gattungsgemäßen Art so weiter zu entwickeln, dass ihre Standzeit erhöht und damit die Betriebskosten gesenkt werden.The present invention is therefore based on the object to develop a separating or grinding wheel of the generic type so that their life increases and thus the operating costs are reduced.

Diese Aufgabe wird durch eine Trenn- oder Schleifscheibe mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a separating or grinding wheel with the features of claim 1.

Wie sich überraschend gezeigt hat, wird durch die Einbringung jeweils einer Senkung beidseitig der Durchgangsbohrung erreicht, dass keine Rissbildung im Bereich der Durchgangsbohrung auftritt.As has been shown, surprisingly, the introduction of a respective reduction on both sides of the through-hole ensures that no crack formation occurs in the region of the through-hole.

Dies ist insbesondere darauf zurückzuführen, dass durch die Senkungen eine optimale Kraftableitung der durch die genannten Mikroschläge verursachten Biegemomente erfolgt. Eine materialermüdende Beanspruchung im Bereich der Durchgangsbohrung wird damit verhindert.This is due, in particular, to the fact that the lowering results in optimum force discharge of the bending moments caused by the microbatters mentioned. A material-fatigue stress in the area of the through hole is thus prevented.

Zweckmäßigerweise sind die beiden, eine Durchgangsbohrung begrenzenden Senkungen gleich ausgebildet, das heißt sowohl hinsichtlich ihres Senkwinkels wie auch ihrer Senktiefe. Letztere kann so gewählt sein, dass sich zwischen beiden Senkungen ein Steg bildet. Denkbar ist auch eine scharfkantige Ausbildung, die sich dann ergibt, wenn eine Senkung unmittelbar bis an die andere Senkung geführt wird. In jedem Fall wird eine Optimierung der Kraftabteilung mit einem Ausschluss einer Rissbildung erreicht.Conveniently, the two, a through hole bounding reductions are the same, that is, both in terms of their sinking angle as well as their sinking depth. The latter can be chosen so that forms a bridge between the two subsidences. It is also conceivable a sharp-edged training, which then results when a reduction is performed directly to the other reduction. In any case, an optimization of the force department is achieved with the exclusion of cracking.

Die neue Trenn- und Schleifscheibe zeichnet sich deshalb durch eine gegenüber einer nach dem Stand der Technik wesentlich höhere Standzeit aus, bei der dann der Verschleiß der Schneidsegmente das bestimmende Kriterium ist.Therefore, the new cutting and grinding wheel is characterized by a much longer compared to a state of the art, in which then the wear of the cutting segments is the determining criterion.

Gerade unter dem Aspekt, dass solche Trenn- oder Schleifscheiben vielfach im Dauerbetrieb zum Einsatz kommen, kommt diesem Umstand eine besondere Bedeutung zu. Alles in allem lässt sich festhalten, dass die Erfindung zu einer Betriebskostenoptimierung führt, die einen wirklich rationellen Einsatz erst möglich macht.Especially under the aspect that such cutting or grinding discs are often used in continuous operation, this circumstance is of particular importance. All in all, it can be said that the invention leads to an operating cost optimization that makes a really rational use possible.

Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der beigefügten Zeichnungen beschrieben.An embodiment of the invention will be described below with reference to the accompanying drawings.

Es zeigen:

Figur 1
eine Trenn- oder Schleifscheibe in einer Draufsicht
Figur 2
einen vergrößerten Teilausschnitt der Trenn- oder Schleifscheibe gemäß der Linie II ― II in Figur 1
Show it:
FIG. 1
a separating or grinding wheel in a plan view
FIG. 2
an enlarged partial section of the cutting or grinding wheel according to the line II - II in FIG. 1

In der Figur 1 ist eine Trenn- oder Schleifscheibe dargestellt, die ein kreisförmiges Blatt 1, vorzugsweise aus Stahlblech aufweist, an dessen Umfangsrand eine Vielzahl von Schneidzähnen 2 angeordnet sind, die in Form und Abmaß gleich ausgebildet und gleichmäßig über den Umfangsrand verteilt angeordnet sind.In the FIG. 1 a separating or grinding wheel is shown which comprises a circular blade 1, preferably made of sheet steel, at the peripheral edge of a plurality of cutting teeth 2 are arranged, which are the same shape and dimension and uniformly distributed over the peripheral edge.

Jeder Schneidzahn 2 ist mit Diamantsegmenten 5 bestückt, die in ihrer Gesamtheit eine Schneidkante bilden.Each cutting tooth 2 is equipped with diamond segments 5, which form a cutting edge in their entirety.

Zwischen jeweils zwei Schneidzähnen 2 ist eine radial sich erstreckende, schlitzförmige Einkerbung 3 vorgesehen, die sich im Bereich der Diamantsegmente 5 nach außen hin erweitert und andererseits in eine Durchgangsbohrung 4 mündet, die in das Blatt 1 eingebracht ist. Im vorliegenden Beispiel ist der Durchmesser der Durchgangsbohrungen 4 größer als die Breite der sich anschließenden Einkerbungen 3.Between each two cutting teeth 2, a radially extending, slot-shaped notch 3 is provided, which widens outwardly in the region of the diamond segments 5 and, on the other hand, opens into a through-bore 4, which is introduced into the blade 1. In the present example, the diameter of the through-holes 4 is greater than the width of the adjoining notches 3.

Jede Durchgangsbohrung 4 weist beidseitig eine Senkung 6 auf, was besonders deutlich in der Figur 2 erkennbar ist.Each through hole 4 has on both sides of a countersink 6, which is particularly evident in the FIG. 2 is recognizable.

Im vorliegenden Ausführungsbeispiel verlaufen die spiegelsymmetrisch ausgebildeten Senkungen 6, bezogen auf die Mittelachse der Durchgangsbohrung 4 unter einem Winkel von 45°, so dass die beiden sich gegenüberliegenden Schrägen einer Senkung 6 einen Winkel von 90° einschließen. Prinzipiell denkbar sind auch andere eingeschlossene Winkelgrößen, beispielsweise 120° oder 60°.In the present embodiment, the mirror-symmetrical countersinks 6, relative to the center axis of the through hole 4 extend at an angle of 45 °, so that the two opposing bevels of a countersink 6 form an angle of 90 °. In principle, other included angle sizes, for example 120 ° or 60 °, are also conceivable.

Die beiden sich gegenüberliegenden Senkungen 6 sind gleich tief eingebracht und in ihrer Tiefe so bemessen, dass sich zwischen ihnen ein Steg 7 bildet, der den lichten Durchmesser der Durchgangsbohrung 4 definiert. Anstelle eines solchen Steges 7 kann auch eine scharfe Kante herausgebildet sein, wenn eine Senkung 6 bis in den Anfangsbereich der gegenüberliegenden Senkung 6 geführt ist.The two opposing counterbores 6 are inserted the same depth and dimensioned in depth so that a web 7 forms between them, which defines the clear diameter of the through hole 4. Instead of such a bridge 7 can also be formed a sharp edge when a reduction 6 is guided to the beginning of the opposite countersink 6.

Der Übergangsbereich jeder Senkung 6 zur zugeordneten Außenseite des Blattes 1 kann kantig oder geringförmig gerundet ausgebildet sein, je nach Erfordernis.The transition region of each reduction 6 to the associated outer side of the sheet 1 may be formed edged or slightly rounded, as required.

Claims (5)

  1. Cutting or grinding disc, having a circular blade (1), on the circumferential margin of which a multiplicity of cutting teeth (2) are provided, between which a respective radial, slot-shaped notch (5) runs which opens into a through-hole (4), the diameter of each through-hole (4) being larger than the width of the adjoining notch (3), characterized in that each through-hole (4) has a respective countersink (6) on both sides, said countersink (6) being directed at the same depth up to the start of the opposite countersink (6).
  2. Cutting or grinding disc according to Claim 1, characterized in that the two opposite countersinks (6) are formed in mirror symmetry.
  3. Cutting or grinding disc according to one of the preceding claims, characterized in that, at the same depth of the opposite countersinks (6), a web (7) is formed between them.
  4. Cutting or grinding disc according to one of the preceding claims, characterized in that each countersink (6) encloses an angle of 60°, preferably 90° or 120°.
  5. Cutting or grinding disc according to one of the preceding claims, characterized in that each countersink (6) is rounded in the transition region to the associated outer side of the blade (1).
EP20060117648 2005-08-05 2006-07-21 Wheel for cutting-off or grinding Expired - Fee Related EP1749618B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520012312 DE202005012312U1 (en) 2005-08-05 2005-08-05 Cutting disc has cutting segments separated by radial slits terminated by round bores and with countersunk profiles to reduce stress

Publications (2)

Publication Number Publication Date
EP1749618A1 EP1749618A1 (en) 2007-02-07
EP1749618B1 true EP1749618B1 (en) 2008-09-03

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EP20060117648 Expired - Fee Related EP1749618B1 (en) 2005-08-05 2006-07-21 Wheel for cutting-off or grinding

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DE (2) DE202005012312U1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990828A (en) * 1960-09-19 1961-07-04 Super Cut Rotary segmental saw with rim rigidifying and silencing means
FR2424794A1 (en) * 1978-05-03 1979-11-30 Triefus France Applic Indles D IMPROVEMENTS TO WHEELS BASED ON EXPENSIVE ABRASIVES WITH METALLIC CORE NOTCHED AT THEIR PERIPHERY

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Publication number Publication date
DE202005012312U1 (en) 2005-10-20
EP1749618A1 (en) 2007-02-07
DE502006001477D1 (en) 2008-10-16

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