EP2251164A1 - Chipping tool - Google Patents

Chipping tool Download PDF

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Publication number
EP2251164A1
EP2251164A1 EP10004772A EP10004772A EP2251164A1 EP 2251164 A1 EP2251164 A1 EP 2251164A1 EP 10004772 A EP10004772 A EP 10004772A EP 10004772 A EP10004772 A EP 10004772A EP 2251164 A1 EP2251164 A1 EP 2251164A1
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EP
European Patent Office
Prior art keywords
cutting
projection
projections
tool according
axial direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10004772A
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German (de)
French (fr)
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EP2251164B1 (en
Inventor
Oliver Galli
Ewald Westfal
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Ledermann GmbH and Co KG
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Ledermann GmbH and Co KG
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Priority to PL10004772T priority Critical patent/PL2251164T3/en
Publication of EP2251164A1 publication Critical patent/EP2251164A1/en
Application granted granted Critical
Publication of EP2251164B1 publication Critical patent/EP2251164B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/20—Edge trimming saw blades or tools combined with means to disintegrate waste
    • 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
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/02—Structural design of saw blades or saw teeth
    • B27B33/08—Circular saw blades

Definitions

  • the invention relates to a cutting tool, in particular for formatting plates made of a wood-like material having the features according to the preamble of claim 1.
  • Sheets of wood-like materials such as chipboard or the like are machined with rotary driven cutting tools and brought into shape.
  • One step here is the formatting, in which in particular straight edges are to be produced cleanly and free from spalling by means of a suitable cutting tool.
  • Such cutting tools comprise a base body, on the circumference of cutting teeth are arranged, wherein the cutting teeth each have a peripheral edge and a relative to the axis of rotation in the axial direction over the base body protruding, adjacent to the peripheral cutting edge cutting edge.
  • the cutting edges act both on the peripheral side and on the end face facing the workpiece with the aim of achieving the cleanest possible cutting surface.
  • the invention has the object of developing a generic cutting tool such that the quality of cut is improved and maintained over a longer life.
  • the cutting teeth have radially inwardly of the axially protruding cutting projection at least one second, and preferably also at least one third, protruding in the axial direction over the main body cutting projection.
  • the radially inner cutting projection is offset relative to the radially outer adjacent cutting projection in the axial direction and in particular set back.
  • the radially inner and radially outer cutting projections support each other. Individual chips that are not cut clean by the radially outer cutting projections are finally separated cleanly by the radially inner cutting projections and vice versa. This mutual support effect is maintained even with the onset of wear, so that the service life of the cutting tool is increased.
  • the axial offset between the radially outer and radially inner cutting projections causes first the axially further projecting cutting projections are used primarily. Thus, they are subject to the usual wear and tear, while the more recessed cutting projections are less loaded and have a later onset wear. With progressive wear of the particular radially outer cutting projections come the set back, here radially inner cutting projections increasingly used.
  • the cutting projections of a single cutting tooth lie on a straight line which is inclined at an angle with respect to a radial direction perpendicular to the axis of rotation.
  • the angle is preferably in a range of 0.5 ° to 2.0 ° inclusive, and more preferably about 1.0 °.
  • the cutting projections have axially outer tips.
  • the tips are formed asymmetrically.
  • the cutting projections have a contour with a rounded waveform. Both embodiments lead to a clean, outbreak-free cutting result with significantly extended service life.
  • the peripheral cutting edge simultaneously forms the radially outermost, axially projecting cutting projection by means of its corner projecting in the axial direction.
  • a chamfer is arranged between the radially outer, axially projecting cutting projection and the peripheral cutting edge.
  • the chamfer reduces the impact sensitivity of the cutting edge. The risk of cutouts in the cutting edge is reduced, which ensures the quality of the cut surface with higher reliability.
  • To further improve the cutting result contributes to an embodiment in which the peripheral edge is inclined in the direction of the cutting projection to the axis of rotation.
  • Fig. 1 shows a cross-sectional view of a first embodiment of a cutting tool 1 according to the invention for wood-like materials.
  • the cutting tool in the embodiment according to the invention can also be used for other materials, in particular for non-ferrous metals, plastics, plasterboard, fiber composites or the like.
  • the cutting tool 1 is provided in the present embodiment for the formatting of plates, in particular chipboard and is for this purpose driven about a rotation axis 2.
  • the cutting tool 1 comprises a substantially circular disk-shaped base body 3, on whose circumference 4 a plurality of cutting teeth 5 is in particular evenly distributed.
  • the cutting teeth 5 are arranged on the circumference 4 of the base body 3 in such a way that they partially protrude beyond an associated end face 14 of the base body 3 in the axial direction predetermined by the rotation axis 2.
  • the cutting tool 1 is moved in a plane perpendicular to the axis of rotation 2 radial direction 11 relative to the workpiece, not shown.
  • the cutting teeth 5 machine on its peripheral side and on its front side, the material of the workpiece.
  • Fig. 2 shows in an enlarged detail the in Fig. 1 specified detail II arranged on the circumference 4 of the base body 3 cutting tooth 5 in the radial direction 11 outer peripheral edge 6 and a relative to the in Fig. 1 illustrated rotational axis 2 in the axial direction on the base body 3 protruding, adjacent to the peripheral cutting edge 6 first cutting projection 7.
  • the cutting projection 7 can be formed by a corner of the rectilinearly formed peripheral cutting edge 6.
  • a chamfer 13 is arranged between the radially outer cutting projection 7 and the peripheral cutting edge 6.
  • the peripheral cutting edge 6 can also have a curved course.
  • the circumferential cutting edge 6 runs from left to right, that is to say sloping in the direction of the cutting projection 7, that is to say to the axis of rotation 2 (FIG. Fig. 1 ) inclined.
  • the cutting tooth 5 is provided on the radially inner side of the cutting projection 7 with at least one second cutting projection 8 protruding beyond the main body 3 in the axial direction.
  • a third, in the axial direction above the base body 3 protruding cutting projection 9 is also provided radially inside the second cutting projection 8.
  • the second cutting projection 8 is slightly offset from the radially outer adjacent cutting projection 7 in the axial direction.
  • the third cutting projection 9, which is arranged offset in the axial direction relative to the radially outwardly junachagten cutting projection 8.
  • it can also be a reverse arrangement or axial offset between the cutting projections 7, 8, 9 expedient, in which the respective radially outer cutting projection 7, 8 with respect to the radially inner adjacent cutting projection 8, 9 is arranged set back.
  • the cutting projections 7, 8, 9 have axially outer tips 12.
  • they or their tips 12 lie on a straight line 10, which is inclined ⁇ to the radial direction 11 to form the axial offset described above by a small angle.
  • the amount of the angle ⁇ is preferably in a range of from 0.5 ° to 2.0 ° inclusive, and is 1.0 ° in the illustrated embodiment.
  • the cutting tooth 5 is sharpened not only in the region of its peripheral cutting edge 6, but also on its chamfer 13 and in the entire end area covering the cutting projections 7, 8, 9.
  • a ground contour is selected, according to which the cutting projections 7, 8, 9 are formed asymmetrically relative to the axial direction. This means that the flanks of the cutting projections 7, 8, 9 adjoining the respective tips 12 lie radially outward at a shallower angle to the axial direction than the radially inner legs respectively adjacent to the tips 12. But it can Also, a symmetrical configuration of the tips 12 and the cutting projections 7, 8, 9 or a non-symmetrical in the reverse direction configuration may be appropriate.
  • Fig. 2 shows an example of one of many cutting teeth 5, wherein all cutting teeth 5 are formed identically. Due to the arrangement of the cutting teeth 5 on the circumference 4 of the base body 3, the peripheral cutting edges 6 of all cutting teeth 5 lie on a common conical surface. The same also applies to the chamfers 13 as well as to the straight lines 10 of all the cutting teeth 5. However, an arrangement may also be expedient in which not all the cutting teeth 5 are formed in the form shown. One possibility is, for example, that the cutting projections 7, 8, 9 of a single cutting tooth 5 are offset relative to those of an adjacent in the circumferential direction cutting tooth 5 in the radial direction 11 and / or have a different shape and / or a different number.
  • Fig. 3 shows a variant of the arrangement according to Fig. 1 in which the cutting teeth 5 have a different shape.
  • specified detail IV is in enlarged detail in Fig. 4 shown, therefore, the cutting projections 7, 8, 9 have a contour with rounded waveform. Sharp-edged tips 12 as shown Fig. 2 are not available. Nevertheless, the cutting tooth 5 as well as in the embodiment Fig. 2 in its entire, the cutting projections 7, 8, 9 covering area sharply ground to form the rounded waveform.
  • the embodiment is correct after the 3 and 4 with the one after the Fig. 1 and 2 match.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Drilling Tools (AREA)

Abstract

The tool has a base body (3) rotatably driven around a rotational axis and arranged in a circumferential region (4) of cutting teeth (5). The cutting teeth include a circumferential cutting region (6) and protrude on the circumferential cutting region adjacent to a cutting projection (7) relative to the rotational axis in an axial direction over the base body. The cutting teeth are radially arranged within the cutting projection, and another set of cutting projections (8, 9) is projected in the axial direction over the base body.

Description

Die Erfindung betrifft ein Zerspanungswerkzeug insbesondere zum Formatieren von Platten aus einem holzartigen Werkstoff mit den Merkmalen nach dem Oberbegriff des Anspruchs 1.The invention relates to a cutting tool, in particular for formatting plates made of a wood-like material having the features according to the preamble of claim 1.

Platten aus holzartigen Werkstoffen wie Spanplatten oder dergleichen werden mit drehend angetriebenen Zerspanungswerkzeugen bearbeitet und in Form gebracht. Ein Arbeitsschritt ist dabei das Formatieren, bei dem insbesondere geradlinige Kanten sauber und frei von Abplatzungen mittels eines geeigneten Zerspanungswerkzeuges hergestellt werden sollen.Sheets of wood-like materials such as chipboard or the like are machined with rotary driven cutting tools and brought into shape. One step here is the formatting, in which in particular straight edges are to be produced cleanly and free from spalling by means of a suitable cutting tool.

Derartige Zerspanungswerkzeuge umfassen einen Grundkörper, an dessen Umfang Schneidzähne angeordnet sind, wobei die Schneidzähne jeweils eine Umfangsschneide und einen bezogen auf die Drehachse in der axialen Richtung über den Grundkörper hervorstehenden, an die Umfangsschneide angrenzenden Schneidvorsprung aufweisen. Unter Erzeugung eines vergleichsweise hohen Zerspanungsvolumens wirken die Schneiden sowohl an der Umfangsseite als auch an der dem Werkstück zugewandten Stirnseite mit dem Ziel, eine möglichst saubere Schnittfläche zu erreichen.Such cutting tools comprise a base body, on the circumference of cutting teeth are arranged, wherein the cutting teeth each have a peripheral edge and a relative to the axis of rotation in the axial direction over the base body protruding, adjacent to the peripheral cutting edge cutting edge. By producing a comparatively high metal removal volume, the cutting edges act both on the peripheral side and on the end face facing the workpiece with the aim of achieving the cleanest possible cutting surface.

Aus der DE 101 07 881 ist ein gattungsgemäßes Zerspanungswerkzeug bekannt, dessen Umfangsschneiden und Stirnschneiden scharfkantig ineinander übergehen, wobei die Umfangsschneiden eine lineare Form aufweisen. Der Eckbereich zwischen den Umfangsschneiden und den daran angrenzenden Stirnschneiden bilden den in der axialen Richtung über den Grundkörper hervorstehenden Schneidvorsprung, dessen Eigenschaften für die angestrebte Qualität der Schnittfläche maßgeblich sind. Bei der gezeigten Anordnung sind verschiedene Nachteile zu beobachten. Der Übergang von Stirn- und Umfangsschneiden ist schlagempfindlich. Durch in der Spanplatte befindliche Fremdkörper kann es zu Abplatzungen in diesem qualitätsbildenden Schneidenbereich kommen. Die gewünschte Schnittflächengüte wird dann nicht mehr erreicht. Darüber hinaus führt auch der gewöhnliche Verschleiß zu vergleichbaren Effekten. In der Folge von durch Verschleiß abgerundeten und abgestumpften Schneidenecken kann die Spanplatte nicht mehr sauber zerspant werden. Es kommt zu Ausbrüchen an den Plattendeckschichten und auch zu Fehlstellen in den Mittellagen der Spanplatte. Nicht sauber durchtrennte Späne verbleiben am Werkstück, geben zunächst nach und richten sich dann anschießend in unerwünschter Weise wieder auf, was ebenfalls das Schnittergebnis beeinträchtigt.From the DE 101 07 881 is a generic cutting tool known, the peripheral cutting and cutting edge sharp edges merge into one another, wherein the peripheral cutting edges have a linear shape. The corner region between the peripheral cutting edges and the end cutting edges adjacent thereto form the cutting projection protruding beyond the main body in the axial direction, the properties of which are decisive for the desired quality of the cut surface. In the arrangement shown, various disadvantages can be observed. The transition from the face and peripheral cutting edges is shock sensitive. Foreign particles in the chipboard can cause chipping in this quality-forming cutting area. The desired Schnittflächengüte is then no longer achieved. In addition, the ordinary wear leads to comparable effects. As a result of rounded and truncated cutting corners due to wear, the chipboard can no longer be cut cleanly. It comes to eruptions on the plate top layers and also to defects in the middle layers of the chipboard. Chips that have not been cut cleanly remain on the workpiece, give way first, and then re-align undesirably, which also affects the cutting result.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Zerspanungswerkzeug derart weiterzubilden, dass die Schnittqualität verbessert ist und über eine längere Standzeit aufrecht erhalten bleibt.The invention has the object of developing a generic cutting tool such that the quality of cut is improved and maintained over a longer life.

Diese Aufgabe wird durch ein Zerspanungswerkzeug mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a cutting tool having the features of claim 1.

Hierzu wird eine Anordnung vorgeschlagen, bei der die Schneidzähne radial innenseitig des axial hervorstehenden Schneidvorsprunges mindestens eine zweiten, bevorzugt auch mindestens einen dritten in der axialen Richtung über den Grundkörper hervorstehenden Schneidvorsprung aufweisen. Bevorzugt ist der radial innere Schneidvorsprung gegenüber dem radial außen benachbarten Schneidvorsprung in der axialen Richtung versetzt und insbesondere zurückversetzt angeordnet.For this purpose, an arrangement is proposed in which the cutting teeth have radially inwardly of the axially protruding cutting projection at least one second, and preferably also at least one third, protruding in the axial direction over the main body cutting projection. Preferably, the radially inner cutting projection is offset relative to the radially outer adjacent cutting projection in the axial direction and in particular set back.

Die radial inneren und radial äußeren Schneidvorsprünge unterstützen sich gegenseitig. Einzelne Späne, die durch die radial äußeren Schneidvorsprünge nicht sauber durchtrennt sind, werden durch die radial inneren Schneidvorsprünge schließlich sauber abgetrennt und umgekehrt. Diese gegenseitige Unterstützungswirkung bleibt auch bei einsetzendem Verschleiß erhalten, so dass die Standzeit des Zerspanungswerkzeuges erhöht ist. Der axiale Versatz zwischen den radial äußeren und radial inneren Schneidvorsprüngen führt dazu, dass zunächst die axial weiter hervorstehenden Schneidvorsprünge vorrangig zum Einsatz kommen. Damit unterliegen sie dem gewöhnlichen Betriebsverschleiß, während die weiter zurückversetzten Schneidvorsprünge geringer belastet sind und einen erst später einsetzenden Verschleiß aufweisen. Mit fortschreitendem Verschleiß der insbesondere radial äußeren Schneidvorsprünge kommen die zurückversetzten, hier radial inneren Schneidvorsprünge zunehmend zum Einsatz. Aufgrund ihres noch nicht vorhandenen bzw. geringeren Verschleißes weisen sie die nötige Schärfe auf, um das gewünschte saubere Schnittergebnis zu erzeugen. Der axiale Versatz führt also zu einem über die Lebensdauer zeitlich sequenziell gestaffelten Verschleiß, bei dem über eine deutlich verlängerte Standzeit zumindest im radial inneren Bereich immer noch hinreichend scharfe Schneidvorsprünge an der Stirnfläche des Zerspanungswerkzeuges zur Verfügung stehen.The radially inner and radially outer cutting projections support each other. Individual chips that are not cut clean by the radially outer cutting projections are finally separated cleanly by the radially inner cutting projections and vice versa. This mutual support effect is maintained even with the onset of wear, so that the service life of the cutting tool is increased. The axial offset between the radially outer and radially inner cutting projections causes first the axially further projecting cutting projections are used primarily. Thus, they are subject to the usual wear and tear, while the more recessed cutting projections are less loaded and have a later onset wear. With progressive wear of the particular radially outer cutting projections come the set back, here radially inner cutting projections increasingly used. Due to their not yet existing or less wear they have the necessary Sharpen to produce the desired clean cut result. The axial offset thus leads to a life-sequentially staggered over the life wear, in which over a significantly extended life at least in the radially inner region are still sufficiently sharp cutting projections on the end face of the cutting tool available.

In vorteilhafter Weiterbildung liegen die Schneidvorsprünge eines einzelnen Schneidzahnes auf einer Geraden, die gegenüber einer senkrecht auf der Drehachse stehenden radialen Richtung um einen Winkel geneigt ist. Der Winkel liegt bevorzugt in einem Bereich von einschließlich 0,5° bis einschließlich 2,0° und beträgt insbesondere etwa 1,0°. Hierbei konnte einerseits eine gute gegenseitige Unterstützungswirkung der radial äußeren und radial inneren Schneidvorsprünge beobachtet werden. Andererseits wurde hierdurch erreicht, dass bei einsetzendem Verschleiß der radial äußeren Schneidvorsprünge eine nahtlose Übernahme der Zerspanungsfunktion durch die radial inneren, noch scharfen Schneidvorsprünge erfolgt.In an advantageous development, the cutting projections of a single cutting tooth lie on a straight line which is inclined at an angle with respect to a radial direction perpendicular to the axis of rotation. The angle is preferably in a range of 0.5 ° to 2.0 ° inclusive, and more preferably about 1.0 °. On the one hand, a good mutual support effect of the radially outer and radially inner cutting projections could be observed. On the other hand, this has been achieved that takes place at the onset of wear of the radially outer cutting projections seamless acquisition of Zerspanungsfunktion by the radially inner, still sharp cutting projections.

In einer bevorzugten Ausführungsform weisen die Schneidvorsprünge axial äußere Spitzen auf. Insbesondere sind die Spitzen unsymmetrisch ausgebildet. Alternativ oder in Kombination damit kann es zweckmäßig sein, dass die Schneidvorsprünge eine Kontur mit gerundeter Wellenform aufweisen. Beide Ausführungsformen führen zu einem sauberen, ausbruchsfreien Schnittergebnis bei deutlich verlängerter Standzeit.In a preferred embodiment, the cutting projections have axially outer tips. In particular, the tips are formed asymmetrically. Alternatively or in combination, it may be expedient that the cutting projections have a contour with a rounded waveform. Both embodiments lead to a clean, outbreak-free cutting result with significantly extended service life.

Es kann zweckmäßig sein, dass die Umfangsschneide mittels ihrer in der axialen Richtung hervorstehenden Ecke gleichzeitig auch den radial äußersten, axial hervorstehenden Schneidvorsprung bildet. Bevorzugt ist jedoch zwischen dem radial äußeren, axial hervorstehenden Schneidvorsprung und der Umfangsschneide eine Fase angeordnet. Die Fase verringert die Schlagempfindlichkeit der Schneide. Die Gefahr von Ausbrüchen in der Schneide ist verringert, wodurch die Qualität der Schnittfläche mit höherer Zuverlässigkeit sichergestellt ist. Zur weiteren Verbesserung des Schnittergebnisses trägt eine Ausführung bei, bei der die Umfangsschneide in Richtung zum Schneidvorsprung zur Drehachse hin geneigt ist.It may be expedient that the peripheral cutting edge simultaneously forms the radially outermost, axially projecting cutting projection by means of its corner projecting in the axial direction. Preferably, however, a chamfer is arranged between the radially outer, axially projecting cutting projection and the peripheral cutting edge. The chamfer reduces the impact sensitivity of the cutting edge. The risk of cutouts in the cutting edge is reduced, which ensures the quality of the cut surface with higher reliability. To further improve the cutting result contributes to an embodiment in which the peripheral edge is inclined in the direction of the cutting projection to the axis of rotation.

Ausführungsbeispiele der Erfindung sind nachfolgend anhand der Zeichnung näher beschrieben. Es zeigen:

Fig. 1
in einer Querschnittsdarstellung ein erfindungsgemäß ausgeführtes Zerspanungswerkzeug mit an seinem Umfang und im Bereich seiner Stirnfläche angeordneten Schneidzähnen;
Fig. 2
eine vergrößerte Detaildarstellung der in Fig. 1 angegebenen Einzelheit II mit Angaben zur Ausgestal- tung der Schneidzähne mit mehreren, hier spitz ausge- führten, in der axialen Richtung hervorstehenden Schneidvorsprüngen;
Fig. 3
eine Variante der Anordnung nach Fig. 1 mit Schneid- zähnen in abweichender Form;
Fig. 4
in vergrößerter Detaildarstellung die Einzelheit IV nach Fig. 3, demnach die Schneidzähne in der axialen Richtung hervorstehende wellenförmige Schneidvor- sprünge aufweisen.
Embodiments of the invention are described below with reference to the drawing. Show it:
Fig. 1
in a cross-sectional view of an inventively designed cutting tool with arranged at its periphery and in the region of its end face cutting teeth;
Fig. 2
an enlarged detail of the in Fig. 1 specified detail II with details of the design of the cutting teeth with a plurality of here pointed, projecting in the axial direction cutting projections;
Fig. 3
a variant of the arrangement according to Fig. 1 with cutting teeth in different form;
Fig. 4
in enlarged detail the detail IV after Fig. 3 according to which the cutting teeth in the axial direction have projecting wave-shaped cutting projections.

Fig. 1 zeigt in einer Querschnittsdarstellung ein erstes Ausführungsbeispiel eines erfindungsgemäßen Zerspanungswerkzeuges 1 für holzartige Werkstoffe. Das Zerspanungswerkzeug in der erfindungsgemäßen Ausgestaltung kann aber auch für andere Werkstoffe, insbesondere für NE-Metalle, Kunststoffe, Gipskartonplatten, Faserverbundwerkstoffe oder dgl. eingesetzt werden. Das Zerspanungswerkzeug 1 ist in der vorliegenden Ausgestaltung für das Formatieren von Platten, insbesondere von Spanplatten vorgesehen und ist hierzu um eine Drehachse 2 antreibbar. Das Zerspanungswerkzeug 1 umfasst einen im Wesentlichen kreisscheibenförmigen Grundkörper 3, über dessen Umfang 4 eine Vielzahl von Schneidzähnen 5 insbesondere gleichmäßig verteilt ist. Die Schneidzähne 5 sind derart am Umfang 4 des Grundkörpers 3 angeordnet, dass sie teilweise in der durch die Drehachse 2 vorgegebenen axialen Richtung über eine zugeordnete Stirnfläche 14 des Grundkörpers 3 hervorstehen. Beim sogenannten Formatieren von Spanplatten oder vergleichbaren Platten aus einem holzartigen Werkstoff wird das Zerspanungswerkzeug 1 in einer senkrecht zur Drehachse 2 liegenden radialen Richtung 11 relativ zum nicht dargestellten Werkstück bewegt. Die Schneidzähne 5 zerspanen dabei auf ihrer Umfangsseite und auf ihrer Stirnseite das Material des Werkstückes. Fig. 1 shows a cross-sectional view of a first embodiment of a cutting tool 1 according to the invention for wood-like materials. The cutting tool in the embodiment according to the invention can also be used for other materials, in particular for non-ferrous metals, plastics, plasterboard, fiber composites or the like. The cutting tool 1 is provided in the present embodiment for the formatting of plates, in particular chipboard and is for this purpose driven about a rotation axis 2. The cutting tool 1 comprises a substantially circular disk-shaped base body 3, on whose circumference 4 a plurality of cutting teeth 5 is in particular evenly distributed. The cutting teeth 5 are arranged on the circumference 4 of the base body 3 in such a way that they partially protrude beyond an associated end face 14 of the base body 3 in the axial direction predetermined by the rotation axis 2. In the so-called formatting of chipboard or similar plates of a wood-like material, the cutting tool 1 is moved in a plane perpendicular to the axis of rotation 2 radial direction 11 relative to the workpiece, not shown. The cutting teeth 5 machine on its peripheral side and on its front side, the material of the workpiece.

Fig. 2 zeigt in einer vergrößerten Detaildarstellung die in Fig. 1 angegebene Einzelheit II. Demnach weist ein einzelner am Umfang 4 des Grundkörpers 3 angeordneter Schneidzahn 5 eine in der radialen Richtung 11 außen liegende Umfangsschneide 6 und einen bezogen auf die in Fig. 1 dargestellte Drehachse 2 in der axialen Richtung über den Grundkörper 3 hervorstehenden, an die Umfangsschneide 6 angrenzenden ersten Schneidvorsprung 7 auf. Der Schneidvorsprung 7 kann durch eine Ecke der hier geradlinig ausgebildeten Umfangsschneide 6 gebildet sein. Im gezeigten Ausführungsbeispiel ist zwischen dem radial äußeren Schneidvorsprung 7 und der Umfangsschneide 6 eine Fase 13 angeordnet. Anstelle eines geradlinigen Verlaufes kann die Umfangsschneide 6 auch einen gekrümmten Verlauf aufweisen. In der Darstellung nach Fig. 2 verläuft die Umfangsschneide 6 von links nach rechts, also in Richtung zum Schneidvorsprung 7 abfallend, ist also zur Drehachse 2 (Fig. 1) hin geneigt. Fig. 2 shows in an enlarged detail the in Fig. 1 specified detail II arranged on the circumference 4 of the base body 3 cutting tooth 5 in the radial direction 11 outer peripheral edge 6 and a relative to the in Fig. 1 illustrated rotational axis 2 in the axial direction on the base body 3 protruding, adjacent to the peripheral cutting edge 6 first cutting projection 7. The cutting projection 7 can be formed by a corner of the rectilinearly formed peripheral cutting edge 6. In the embodiment shown, a chamfer 13 is arranged between the radially outer cutting projection 7 and the peripheral cutting edge 6. Instead of a straight course, the peripheral cutting edge 6 can also have a curved course. In the illustration after Fig. 2 the circumferential cutting edge 6 runs from left to right, that is to say sloping in the direction of the cutting projection 7, that is to say to the axis of rotation 2 (FIG. Fig. 1 ) inclined.

Zusätzlich zum ersten Schneidvorsprung 7 ist der Schneidzahn 5 radial innenseitig des Schneidvorsprunges 7 mit mindestens einem zweiten, in der axialen Richtung über den Grundkörper 3 hervorstehenden Schneidvorsprung 8 versehen. Im gezeigten Ausführungsbeispiel ist außerdem radial innenseitig des zweiten Schneidvorsprunges 8 ein dritter, in der axialen Richtung über den Grundkörper 3 hervorstehender Schneidvorsprung 9 vorgesehen. Natürlich kann es auch zweckmäßig sein, bezogen auf die radiale Richtung 11 weiter innen liegend noch zusätzliche Schneidvorsprünge vorzusehen, wobei sich eine Gesamtzahl von Schneidvorsprüngen 7, 8, 9 in einem Bereich von einschließlich zwei Stück bis einschließlich fünf Stück pro Schneidzahn 5 als zweckmäßig herausgestellt hat. Der zweite Schneidvorsprung 8 ist gegenüber dem radial außen benachbarten Schneidvorsprung 7 in der axialen Richtung geringfügig zurückversetzt angeordnet. Sinngemäß das Gleiche gilt auch für den dritten Schneidvorsprung 9, der in der axialen Richtung gegenüber dem radial außen beanachbarten Schneidvorsprung 8 zurückversetzt angeordnet ist. Es kann aber auch eine umgekehrte Anordung bzw. axialer Versatz zwischen den Schneidvorsprüngen 7, 8, 9 zweckmäßig sein, bei der der jeweils radial äußere Schneidvorsprung 7, 8 gegenüber dem radial innen benachbarten Schneidvorsprung 8, 9 zurückversetzt angeordnet ist. Die Schneidvorsprünge 7, 8, 9 weisen axial äußere Spitzen 12 auf. Außerdem liegen sie bzw. ihre Spitzen 12 auf einer Geraden 10, die zur Bildung des vorstehend beschriebenen axialen Versatzes um einen kleinen Winkel α gegenüber der radialen Richtung 11 geneigt ist. Der Betrag des Winkels α liegt bevorzugt in einem Bereich von einschließlich 0,5° bis einschließlich 2,0° und beträgt im gezeigten Ausführungsbeispiel 1,0°. Hierdurch ist erreicht, dass der jeweils radial innere Schneidvorsprung 8, 9 gegenüber dem jeweils radial außen benachbarten Schneidvorsprung 7, 8 in der axialen Richtung zum Grundkörper 3 hin zurückversetzt angeordnet ist.In addition to the first cutting projection 7, the cutting tooth 5 is provided on the radially inner side of the cutting projection 7 with at least one second cutting projection 8 protruding beyond the main body 3 in the axial direction. In the embodiment shown, a third, in the axial direction above the base body 3 protruding cutting projection 9 is also provided radially inside the second cutting projection 8. Of course, it may also be expedient to provide further cutting projections in relation to the radial direction 11, wherein a total number of cutting projections 7, 8, 9 in a range of up to and including five pieces per cutting tooth 5 has proven to be expedient , The second cutting projection 8 is slightly offset from the radially outer adjacent cutting projection 7 in the axial direction. The same applies mutatis mutandis to the third cutting projection 9, which is arranged offset in the axial direction relative to the radially outwardly junachagten cutting projection 8. But it can also be a reverse arrangement or axial offset between the cutting projections 7, 8, 9 expedient, in which the respective radially outer cutting projection 7, 8 with respect to the radially inner adjacent cutting projection 8, 9 is arranged set back. The cutting projections 7, 8, 9 have axially outer tips 12. In addition, they or their tips 12 lie on a straight line 10, which is inclined α to the radial direction 11 to form the axial offset described above by a small angle. The amount of the angle α is preferably in a range of from 0.5 ° to 2.0 ° inclusive, and is 1.0 ° in the illustrated embodiment. As a result, it is achieved that the respectively radially inner cutting projection 8, 9 is set back in the axial direction relative to the main body 3 with respect to the respective radially outwardly adjacent cutting projection 7, 8.

Der Schneidzahn 5 ist nicht nur im Bereich seiner Umfangsschneide 6, sondern auch an seiner Fase 13 und in dem gesamten die Schneidvorsprünge 7, 8, 9 überdeckenden Stirnbereich scharf geschliffen. Dabei ist eine Schliffkontur gewählt, demnach die Schneidvorsprünge 7, 8, 9 bezogen auf die axiale Richtung unsymmetrisch ausgebildet sind. Dies bedeutet, dass die an die jeweiligen Spitzen 12 angrenzenden Flanken der Schneidvorsprünge 7, 8, 9 radial außen in einem flacheren Winkel zur axialen Richtung liegen als die jeweils an die Spitzen 12 angrenzenden radial inneren Schenkel. Es kann aber auch eine symmetrische Ausgestaltung der Spitzen 12 bzw. der Schneidvorsprünge 7, 8, 9 oder eine in umgekehrter Richtung unsymmetrische Ausgestaltung zweckmäßig sein.The cutting tooth 5 is sharpened not only in the region of its peripheral cutting edge 6, but also on its chamfer 13 and in the entire end area covering the cutting projections 7, 8, 9. In this case, a ground contour is selected, according to which the cutting projections 7, 8, 9 are formed asymmetrically relative to the axial direction. This means that the flanks of the cutting projections 7, 8, 9 adjoining the respective tips 12 lie radially outward at a shallower angle to the axial direction than the radially inner legs respectively adjacent to the tips 12. But it can Also, a symmetrical configuration of the tips 12 and the cutting projections 7, 8, 9 or a non-symmetrical in the reverse direction configuration may be appropriate.

Fig. 2 zeigt beispielhaft einen von vielen Schneidzähnen 5, wobei sämtliche Schneidzähne 5 identisch ausgebildet sind. Durch die Anordnung der Schneidzähne 5 am Umfang 4 des Grundkörpers 3 liegen die Umfangsschneiden 6 sämtlicher Schneidzähne 5 auf einem gemeinsamen Kegelmantel. Das gleiche gilt auch für die Fasen 13 sowie für die Geraden 10 sämtlicher Schneidzähne 5. Es kann aber auch eine Anordnung zweckmäßig sein, bei der nicht sämtliche Schneidzähne 5 in der gezeigten Form ausgebildet sind. Eine Möglichkeit besteht zum Beispiel darin, dass die Schneidvorsprünge 7, 8, 9 eines einzelnen Schneidzahnes 5 gegenüber denjenigen eines in der Umfangsrichtung benachbarten Schneidzahnes 5 in der radialen Richtung 11 versetzt angeordnet sind und/oder eine abweichende Form und/oder eine abweichende Anzahl aufweisen. Fig. 2 shows an example of one of many cutting teeth 5, wherein all cutting teeth 5 are formed identically. Due to the arrangement of the cutting teeth 5 on the circumference 4 of the base body 3, the peripheral cutting edges 6 of all cutting teeth 5 lie on a common conical surface. The same also applies to the chamfers 13 as well as to the straight lines 10 of all the cutting teeth 5. However, an arrangement may also be expedient in which not all the cutting teeth 5 are formed in the form shown. One possibility is, for example, that the cutting projections 7, 8, 9 of a single cutting tooth 5 are offset relative to those of an adjacent in the circumferential direction cutting tooth 5 in the radial direction 11 and / or have a different shape and / or a different number.

Fig. 3 zeigt eine Variante der Anordnung nach Fig. 1, bei der die Schneidzähne 5 eine davon abweichende Form aufweisen. Die in Fig. 3 angegebene Einzelheit IV ist in vergrößerter Detaildarstellung in Fig. 4 gezeigt, demnach die Schneidvorsprünge 7, 8, 9 eine Kontur mit gerundeter Wellenform aufweisen. Scharfkantige Spitzen 12 entsprechend der Darstellung nach Fig. 2 sind nicht vorhanden. Gleichwohl ist der Schneidzahn 5 ebenso wie im Ausführungsbeispiel nach Fig. 2 in seinem gesamten, die Schneidvorsprünge 7, 8, 9 abdeckenden Bereich unter Bildung der gerundeten Wellenform scharf geschliffen. In den übrigen Merkmalen und Bezugszeichen stimmt das Ausführungsbeispiel nach den Fig. 3 und 4 mit demjenigen nach den Fig. 1 und 2 überein. Fig. 3 shows a variant of the arrangement according to Fig. 1 in which the cutting teeth 5 have a different shape. In the Fig. 3 specified detail IV is in enlarged detail in Fig. 4 shown, therefore, the cutting projections 7, 8, 9 have a contour with rounded waveform. Sharp-edged tips 12 as shown Fig. 2 are not available. Nevertheless, the cutting tooth 5 as well as in the embodiment Fig. 2 in its entire, the cutting projections 7, 8, 9 covering area sharply ground to form the rounded waveform. In the remaining features and reference numerals, the embodiment is correct after the 3 and 4 with the one after the Fig. 1 and 2 match.

Natürlich ist auch eine Kombination der Merkmale des Ausführungsbeispieles nach den Fig. 1 und 2 mit demjenigen nach den Fig. 3 und 4 möglich. So kann es beispielsweise zweckmäßig sein, spitze und gerundete Schneidvorsprünge 7, 8, 9 innerhalb eines einzelnen Schneidzahnes 5 miteinander zu kombinieren. Außerdem ist es denkbar, dass innerhalb eines einzelnen Zerspanungswerkzeuges 1 unterschiedliche Schneidzähne 5 beispielsweise abwechselnd mit spitzen und gerundeten Schneidvorsprüngen 7, 8, 9 zum Einsatz kommen.Of course, a combination of the features of the embodiment according to the Fig. 1 and 2 with the one after the 3 and 4 possible. Thus, it may be expedient, for example, to combine pointed and rounded cutting projections 7, 8, 9 within a single cutting tooth 5 with one another. In addition, it is conceivable that different cutting teeth 5 are used, for example, alternately with pointed and rounded cutting projections 7, 8, 9 within a single cutting tool 1.

Claims (8)

Zerspanungswerkzeug (1) insbesondere zum Formatieren von Platten aus einem holzartigen Werkstoff, vorgesehen zum drehenden Antrieb um eine Drehachse (2), umfassend einen Grundkörper (3), an dessen Umfang (4) Schneidzähne (5) angeordnet sind, wobei die Schneidzähne (5) jeweils eine Umfangsschneide (6) und einen bezogen auf die Drehachse (2) in der axialen Richtung über den Grundkörper (3) hervorstehenden, an die Umfangsschneide (6) angrenzenden Schneidvorsprung (7) aufweisen,
dadurch gekennzeichnet, dass die Schneidzähne (5) radial innenseitig des Schneidvorsprunges (7) mindestens einen zweiten, bevorzugt auch mindestens einen dritten in der axialen Richtung über den Grundkörper (3) hervorstehenden Schneidvorsprung (8, 9) aufweisen.Cutting tool (1) in particular for formatting plates of a wood-like material, provided for rotating drive about an axis of rotation (2), comprising a base body (3), on whose circumference (4) cutting teeth (5) are arranged, wherein the cutting teeth (5 ) each have a peripheral cutting edge (6) and a cutting projection (7) projecting relative to the rotation axis (2) in the axial direction over the base body (3) and adjacent to the peripheral cutting edge (6),
characterized in that the cutting teeth (5) radially on the inside of the cutting projection (7) at least a second, preferably also at least one third in the axial direction over the base body (3) projecting cutting projection (8, 9). Zerspanungswerkzeug nach Anspruch 1,
dadurch gekennzeichnet, dass der radial innere Schneidvorsprung (8, 9) gegenüber dem radial außen benachbarten Schneidvorsprung (7, 8) in der axialen Richtung versetzt und insbesondere zurückversetzt angeordnet ist.Cutting tool according to claim 1,
characterized in that the radially inner cutting projection (8, 9) relative to the radially outwardly adjacent cutting projection (7, 8) offset in the axial direction and in particular set back. Zerspanungswerkzeug nach Anspruch 2,
dadurch gekennzeichnet, dass die Schneidvorsprünge (7, 8, 9) eines einzelnen Schneidzahnes (5) auf einer Geraden (10) liegen, die gegenüber einer senkrecht auf der Drehachse (2) stehenden radialen Richtung (11) um einen Winkel (α) geneigt ist, dessen Betrag bevorzugt in einem Bereich von einschließlich 0,5° bis einschließlich 2,0° liegt und insbesondere etwa 1,0° beträgt.Cutting tool according to claim 2,
characterized in that the cutting projections (7, 8, 9) of a single cutting tooth (5) lie on a straight line (10) inclined relative to a perpendicular to the axis of rotation (2) radial direction (11) by an angle (α) is, the amount of which is preferably in a range of from 0.5 ° to 2.0 ° inclusive, and more preferably about 1.0 °. Zerspanungswerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schneidvorsprünge (7, 8, 9) axial äußere Spitzen (12) aufweisen.Cutting tool according to one of claims 1 to 3, characterized in that the cutting projections (7, 8, 9) have axially outer tips (12). Zerspanungswerkzeug nach Anspruch 4,
dadurch gekennzeichnet, dass die Spitzen (12) unsymmetrisch ausgebildet sind.Cutting tool according to claim 4,
characterized in that the tips (12) are formed asymmetrically. Zerspanungswerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schneidvorsprünge (7, 8, 9) eine Kontur mit gerundeter Wellenform aufweisen.Cutting tool according to one of claims 1 to 3, characterized in that the cutting projections (7, 8, 9) have a contour with a rounded waveform. Zerspanungswerkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass zwischen dem radial äußeren Schneidvorsprung (7) und der Umfangsschneide (6) eine Fase (13) angeordnet ist.Cutting tool according to one of claims 1 to 6, characterized in that between the radially outer cutting projection (7) and the peripheral cutting edge (6) a chamfer (13) is arranged. Zerspanungswerkzeug nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Umfangsschneide (6) in Richtung zum Schneidvorsprung (7) zur Drehachse (2) hin geneigt ist.Cutting tool according to one of claims 1 to 7, characterized in that the peripheral cutting edge (6) is inclined in the direction of the cutting projection (7) to the axis of rotation (2).
EP10004772.9A 2009-05-16 2010-05-06 Chipping tool Active EP2251164B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810823A (en) * 1930-06-13 1931-06-16 Henry Disston & Sons Inc Circular saw
GB616664A (en) * 1946-09-19 1949-01-25 Arthur Fredrick Johns An improved circular saw
DE10107881A1 (en) 2001-02-20 2002-09-05 Leitz Gmbh & Co Kg Geb Wood machining tool has several circumferentially spaced pre-cutting and secondary cutting blades with dedicated chipping spaces of different volumes for faster removal of chippings
DE102004012619A1 (en) * 2004-03-12 2005-09-29 Keil Werkzeugfabrik, Karl Eischeid Gmbh Cutting plate used in the production of drill bits having a bore dust conveying groove with different core thicknesses comprises a cutting edge with notches having a depth/length allowing production of drill bits with different diameters
WO2008092239A1 (en) * 2007-01-29 2008-08-07 Maurice Micacchi Saw tooth for circular saw

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810823A (en) * 1930-06-13 1931-06-16 Henry Disston & Sons Inc Circular saw
GB616664A (en) * 1946-09-19 1949-01-25 Arthur Fredrick Johns An improved circular saw
DE10107881A1 (en) 2001-02-20 2002-09-05 Leitz Gmbh & Co Kg Geb Wood machining tool has several circumferentially spaced pre-cutting and secondary cutting blades with dedicated chipping spaces of different volumes for faster removal of chippings
DE102004012619A1 (en) * 2004-03-12 2005-09-29 Keil Werkzeugfabrik, Karl Eischeid Gmbh Cutting plate used in the production of drill bits having a bore dust conveying groove with different core thicknesses comprises a cutting edge with notches having a depth/length allowing production of drill bits with different diameters
WO2008092239A1 (en) * 2007-01-29 2008-08-07 Maurice Micacchi Saw tooth for circular saw

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EP2251164B1 (en) 2017-11-29
DE102009021629A1 (en) 2010-11-18
DK2251164T3 (en) 2018-03-05
PT2251164T (en) 2018-02-12

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