EP1402080B1 - Tool for machine tools - Google Patents

Tool for machine tools Download PDF

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Publication number
EP1402080B1
EP1402080B1 EP02748697A EP02748697A EP1402080B1 EP 1402080 B1 EP1402080 B1 EP 1402080B1 EP 02748697 A EP02748697 A EP 02748697A EP 02748697 A EP02748697 A EP 02748697A EP 1402080 B1 EP1402080 B1 EP 1402080B1
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EP
European Patent Office
Prior art keywords
cutting
tool according
reactive
sheathing
bodies
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Expired - Lifetime
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EP02748697A
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German (de)
French (fr)
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EP1402080A2 (en
Inventor
Christian Bonjour
Christian Walker
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Scintilla AG
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Scintilla AG
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    • 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
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the invention relates to a tool for machine tools according to the preamble of claim 1.
  • diamond cutting wheels for machining hard materials, especially stone, concrete or masonry, known with a base body on which a cutting pad is applied.
  • the cutting coating is composed of a binding material and abrasive cutting bodies or diamonds, which are integrated into the binding material in a hot pressing sintering process.
  • the DE 198 44 397 A1 discloses a method for producing granules of cutting bodies, each equipped with a jacket.
  • the formation of a cutting coating takes place by soldering the cutting body to a tool surface.
  • the invention relates to a tool for machine tools with a base body and a cutting pad, which has a binding material in which abrasive in a sintering process
  • Cutting bodies in particular diamonds, are firmly integrated, at least one cutting body is surrounded by a sheath which is formed as an alloy and which has at least one component of a cutting body reactive base material and at least one component of a non-reactive material and which protects the cutting body during the sintering process ,
  • the non-reactive material of the sheath for conveying the hold of the cutting body in the cutting surface is sintered with the bonding material of the cutting surface.
  • the sheath may have a thickness of 0.001 mm to 0.05 mm. Effective protection is attainable and in particular, so called graphitization, i. a chemical reaction of carbonaceous cutting body with the binding material at temperatures of about 600 ° C to 1200 ° C during the sintering process can be avoided. An associated destruction of the cutting body can be prevented and the life of the cutting body can be increased.
  • the cutting body can be embedded by the sheath in cost and economic binding materials that could otherwise destroy the cutting body.
  • the tool can be advantageously produced in a sintering process at temperatures between 600 ° C to 1200 ° C.
  • the sintering can be carried out at a lower cost and at higher temperatures than a sintering process after a H exertpreßclar.
  • the jacketed Cutting body can be used for all sintering processes, such as hot pressing, free sintering, etc.
  • the non-reactive material achieves an advantageous protection of the cutting body and at the same time can be made by the base material an advantageous connection to the cutting body and by the non-reactive material an advantageous bond to the binding material.
  • the sheath consists only of non-reactive material, whereby the cutting body can be protected particularly advantageous.
  • the base material is a metal or an alloy from the groups of the IUPAC Periodic Table 4-6, a particularly advantageous anchoring of the cutting body, in particular of diamonds, in the sheathing can be achieved. Between carbon (C) and the metallic materials from groups 4-6 of the IUPAC Periodic Table, an advantageous chemical compound can be obtained.
  • the sheath has more non-reactive material than reactive material, which in particular in a sintering process with temperatures of 600 ° C to 1200 ° C, a secure protection can be achieved.
  • metals or metal alloys are suitable as non-reactive material, namely from Groups 9 and 11-14 of the IUPAC Periodic Table. With the listed non-reactive metals can be created between the sheath and the binding material of the cutting pad a secure connection and an advantageous protection can be achieved.
  • cutting bodies are combined with each other, e.g. Cubic boron nitride (CBN) and / or tungsten carbide (WC) diamonds etc., which can be used on steel or reinforced concrete.
  • CBN Cubic boron nitride
  • WC tungsten carbide
  • cutting body only a certain type, especially diamonds, each be surrounded with a sheath, it can be surrounded with the same sheath all the cutting body, or it can be surrounded with different sheaths various cutting body.
  • a CVD method in addition to a granulation process, however, a CVD method, other conceivable to the skilled person that appears reasonable method for coating or for the production of a coating of the abrasive cutting bodies, such as a PVD process (P hysical V apour D eposition, physical vapor deposition method), ( C hemical V apour D eposition, Chemical Vapor Deposition Procedure) etc.
  • PVD process Physical V apour D eposition, physical vapor deposition method
  • C hemical V apour D eposition Chemical Vapor Deposition Procedure
  • the solution according to the invention can be used in various tools with abrasive cutters that appear useful to the person skilled in the art, such as, for example, drills, grinding tools and, in particular, cut-off wheels.
  • Fig. 1 shows a diamond cutting wheel 20 according to the invention of a cutting grinder not shown with a base body 10 and individual segments 22.
  • the segments 22 have a cutting pad 12 with a binding material 14, in which in a free sintering abrasive cutting body 16, namely polycrystalline diamonds firmly integrated are.
  • the cutting bodies 16 are each surrounded by a jacket 18 which protects the cutting bodies 16 during the sintering process ( Fig. 2 and Fig. 3 ).
  • the sheath 18 has a constituent of a base material reactive with the cutting body 16 and a constituent of a non-reactive material.
  • the reactive and the non-reactive material form a Cr-Ni-Cu alloy, wherein Cr is the base material and Ni and Cu are the non-reactive material.
  • the individual metallic components are mixed in powder form. Subsequently, the mixed metallic components and the diamonds 16 are weighed in the required amount.
  • a binder consisting of a plastic powder and an isopropanol is stirred into a solution.
  • the paste-like binder, the metallic components and the cutting bodies 16 are then mixed and processed into granules in a granulating machine. This results in a granulate having a size between 0.1 mm and 1.7 mm, wherein the sheath 18 of the cutting body 16 has a thickness of 0.001 mm to 0.05 mm.
  • the resulting granules and a metallic powder forming the bonding material 14 of the cutting pad 12 are mixed and pressed into a green compact, which is then sintered in a free sintering process at 600 ° C to 1200 ° C.
  • the binding material 14 used was in particular the elements from Groups 6, 9 and 11 of the IUPAC Periodic Table or an alloy of these elements.
  • the base material enters into a chemical reaction with the cutting body 16 and combines with it.
  • the non-reactive material protects the cutting body 16 and, on the one hand, largely prevents decomposition of the cutting body 16 by the base material and, on the other hand, sinters the non-reactive material with the binding material 14 of the cutting lining 12 and promotes the support of the cutting body 16 in the binding material 14 and in the cutting pad 12.
  • the sheath 18, the cutting body 16 and the binding material 14 are firmly connected to each other after the sintering process by diffusion.

Abstract

The invention relates to a tool for machine tools, comprising a base (10) and a cutting coating (12) that comprises a binder material (14) in which abrasive cutting bodies (16), especially diamonds, are firmly incorporated by means of a sintering process. The invention is further characterized in that at least one cutting body (16) is surrounded by a coating (18) that protects the cutting body (16) during sintering.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Werkzeug für Werkzeugmaschinen nach dem Oberbegriff des Anspruchs 1.The invention relates to a tool for machine tools according to the preamble of claim 1.

Es sind Diamant-Trennscheiben zur Bearbeitung von harten Materialien, insbesondere von Stein, Beton oder Mauerwerk, mit einem Grundkörper bekannt, auf den ein Schneidbelag aufgebracht ist. Der Schneidbelag setzt sich aus einem Bindematerial und abrasiven Schneidkörpern bzw. Diamanten zusammen, die in einem Heißpreß-Sintervorgang in das Bindematerial eingebunden sind.There are diamond cutting wheels for machining hard materials, especially stone, concrete or masonry, known with a base body on which a cutting pad is applied. The cutting coating is composed of a binding material and abrasive cutting bodies or diamonds, which are integrated into the binding material in a hot pressing sintering process.

Die DE 198 44 397 A1 offenbart ein Verfahren zur Herstellung eines Granulats aus Schneidkörpern, die jeweils mit einer Ummantelung ausgestattet sind. Zudem lehrt die DE 198 44 397 A1 , dass umhüllte Diamantpartikel vereinzelt gesintert werden und dass dadurch ein Zusammenbacken der Schneidkörper verhindert wird. Die Bildung eines Schneidbelags erfolgt durch Auflöten der Schneidkörper auf eine Werkzeugoberfläche.The DE 198 44 397 A1 discloses a method for producing granules of cutting bodies, each equipped with a jacket. In addition, the teaches DE 198 44 397 A1 in that coated diamond particles are occasionally sintered and that thereby caking of the cutting bodies is prevented. The formation of a cutting coating takes place by soldering the cutting body to a tool surface.

Aus der EP 0 485 660 A1 können verschiedene Ausführungsbeispiele eines Verfahrens zur Herstellung eines überzogenen hochabrasiven Schleifkornmaterials entnommen werden. Hierbei wird beispielsweise ein Verbinden von Diamantschleifkörnern durch Heißpressen mit einem Matrixmaterial erläutert.From the EP 0 485 660 A1 For example, various embodiments of a method of making a coated high abrasive abrasive grain material may be taken. Here, for example, a connection of diamond abrasive grains is explained by hot pressing with a matrix material.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung geht aus von einem Werkzeug für Werkzeugmaschinen mit einem Grundkörper und einem Schneidbelag, der ein Bindematerial aufweist, in dem in einem Sintervorgang abrasive Schneidkörper, insbesondere Diamanten, fest eingebunden sind, zumindest ein Schneidkörper mit einer Ummantelung umgeben ist, die als Legierung ausgebildet ist und die wenigstens einen Bestandteil eines mit dem Schneidkörper reaktiven Basismaterials und wenigstens einen Bestandteil eines nichtreaktiven Materials aufweist und die den Schneidkörper während des Sintervorgangs schützt.The invention relates to a tool for machine tools with a base body and a cutting pad, which has a binding material in which abrasive in a sintering process Cutting bodies, in particular diamonds, are firmly integrated, at least one cutting body is surrounded by a sheath which is formed as an alloy and which has at least one component of a cutting body reactive base material and at least one component of a non-reactive material and which protects the cutting body during the sintering process ,

Es wird vorgeschlagen, daß das nichtreaktive Material der Ummantelung zum Fördern des Halts des Schneidkörpers in dem Schneidbelag mit dem Bindematerial des Schneidbelags versintert ist. Die Ummantelung kann eine Stärke von 0,001 mm bis 0,05 mm aufweisen. Es ist ein effektiver Schutz erreichbar und insbesondere kann eine sogenannte Graphitisation, d.h. eine chemische Reaktion kohlenstoffhaltiger Schneidkörper mit dem Bindematerial bei Temperaturen von ca. 600°C bis 1200°C während des Sintervorgangs, vermieden werden. Eine damit verbundene Zerstörung der Schneidkörper kann verhindert und die Lebensdauer der Schneidkörper kann erhöht werden. Zudem können die Schneidkörper durch die Ummantelung in kostengünstige und wirtschaftliche Bindematerialien eingebettet werden, die ansonsten die Schneidkörper zerstören könnten.It is proposed that the non-reactive material of the sheath for conveying the hold of the cutting body in the cutting surface is sintered with the bonding material of the cutting surface. The sheath may have a thickness of 0.001 mm to 0.05 mm. Effective protection is attainable and in particular, so called graphitization, i. a chemical reaction of carbonaceous cutting body with the binding material at temperatures of about 600 ° C to 1200 ° C during the sintering process can be avoided. An associated destruction of the cutting body can be prevented and the life of the cutting body can be increased. In addition, the cutting body can be embedded by the sheath in cost and economic binding materials that could otherwise destroy the cutting body.

Das Werkzeug kann vorteilhaft in einem Sintervorgang bei Temperaturen zwischen 600°C bis 1200°C hergestellt werden. Das Sintern kann mit einem geringeren Aufwand und mit höheren Temperaturen durchgeführt werden als ein Sintervorgang nach einem Heißpreßverfahren. Auf eine Form, wie sie beim Heißt pressen erforderlich ist, kann verzichtet werden. Der ummantelte Schneidkörper kann für alle Sinterverfahren eingesetzt werden, wie z.B. Heißpressen, Freisintern usw.The tool can be advantageously produced in a sintering process at temperatures between 600 ° C to 1200 ° C. The sintering can be carried out at a lower cost and at higher temperatures than a sintering process after a Heißpreßverfahren. On a mold, as it is required in hot pressing, can be dispensed with. The jacketed Cutting body can be used for all sintering processes, such as hot pressing, free sintering, etc.

Es kann während des Sintervorgangs durch das nichtreaktive Material ein vorteilhafter Schutz des Schneidkörpers erreicht und gleichzeitig kann durch das Basismaterial eine vorteilhafte Verbindung zum Schneidkörper und durch das nichtreaktive Material eine vorteilhafte Verbindung zum Bindematerial hergestellt werden. Grundsätzlich ist jedoch auch denkbar, daß die Ummantelung nur aus nichtreaktivem Material besteht, wodurch der Schneidkörper besonders vorteilhaft geschützt werden kann.It can during the sintering process by the non-reactive material achieves an advantageous protection of the cutting body and at the same time can be made by the base material an advantageous connection to the cutting body and by the non-reactive material an advantageous bond to the binding material. In principle, however, it is also conceivable that the sheath consists only of non-reactive material, whereby the cutting body can be protected particularly advantageous.

Ist das Basismaterial ein Metall oder eine Legierung aus den Gruppen des IUPAC Periodensystems 4-6, kann eine besonders vorteilhafte Verankerung des Schneidkörpers, insbesondere von Diamanten, in der Ummantelung erreicht werden. Zwischen Kohlenstoff (C) und den metallischen Materialien aus den Gruppen 4-6 des IUPAC Periodensystems kann eine vorteilhafte chemische Verbindung erzielt werden.If the base material is a metal or an alloy from the groups of the IUPAC Periodic Table 4-6, a particularly advantageous anchoring of the cutting body, in particular of diamonds, in the sheathing can be achieved. Between carbon (C) and the metallic materials from groups 4-6 of the IUPAC Periodic Table, an advantageous chemical compound can be obtained.

Ferner wird vorgeschlagen, daß die Ummantelung mehr nichtreaktives Material aufweist als reaktives Material, wodurch insbesondere bei einem Sintervorgang mit Temperaturen von 600°C bis 1200°C ein sicherer Schutz erreicht werden kann. Insbesondere eignen sich als nichtreaktives Material Metalle oder Metallegierungen, und zwar aus den Gruppen 9 und 11-14 des IUPAC Periodensystems. Mit den aufgeführten nichtreaktiven Metallen kann zwischen der Ummantelung und dem Bindematerial des Schneidbelags eine sichere Verbindung geschaffen und ein vorteilhafter Schutz erzielt werden.It is also proposed that the sheath has more non-reactive material than reactive material, which in particular in a sintering process with temperatures of 600 ° C to 1200 ° C, a secure protection can be achieved. In particular, metals or metal alloys are suitable as non-reactive material, namely from Groups 9 and 11-14 of the IUPAC Periodic Table. With the listed non-reactive metals can be created between the sheath and the binding material of the cutting pad a secure connection and an advantageous protection can be achieved.

Besonders vorteilhafte Ergebnisse können mit Ummantelungen erzielt werden, die bezogen auf das reaktive und das nichtreaktive Material ca. 10 - 30% Cr, 50 - 70% Ni und 10 - 30% Cu oder 40 - 60% Bronze, 30 - 50% Cu und 1 - 15% Ti aufweisen.Particularly advantageous results can be achieved with cladding, based on the reactive and the non-reactive Material approx. 10 - 30% Cr, 50 - 70% Ni and 10 - 30% Cu or 40 - 60% bronze, 30 - 50% Cu and 1 - 15% Ti.

Der Fachmann kann auf verschiedene, ihm als geeignet erscheinende Diamanten zurückgreifen, wie beispielsweise auf Naturdiamanten, polykristalline Diamanten oder auf synthetische Diamanten usw. Ferner können auch andere, dem Fachmann als sinnvoll erscheinende kohlenstoffhaltige Schneidkörper verwendet werden, wie beispielsweise Wolframcarbid (WC) oder Siliziumcarbid (SiC) usw.The person skilled in the art can make use of various diamonds which appear to him suitable, for example natural diamonds, polycrystalline diamonds or synthetic diamonds, etc. Furthermore, other carbonaceous cutting bodies which appear appropriate to the person skilled in the art may also be used, for example tungsten carbide (WC) or silicon carbide (US Pat. SiC) etc.

Um ein universell einsetzbares Werkzeug zu schaffen, sind vorteilhaft unterschiedliche Schneidkörper miteinander kombiniert, wie z.B. Diamanten mit kubischem Bornitrid (CBN) und/oder mit Wolframcarbid (WC) usw., wodurch das Einsatzgebiet auf Stahl bzw. armierten Beton erweitert werden kann. Dabei können Schneidkörper nur einer bestimmten Art, insbesondere Diamanten, jeweils mit einer Ummantelung umgeben sein, es können sämtliche Schneidkörper jeweils mit derselben Ummantelung umgeben sein, oder es können verschiedene Schneidkörper mit verschiedenen Ummantelungen umgeben sein.In order to provide a universally applicable tool, advantageously different cutting bodies are combined with each other, e.g. Cubic boron nitride (CBN) and / or tungsten carbide (WC) diamonds etc., which can be used on steel or reinforced concrete. In this case, cutting body only a certain type, especially diamonds, each be surrounded with a sheath, it can be surrounded with the same sheath all the cutting body, or it can be surrounded with different sheaths various cutting body.

Ferner kann die Herstellung eines erfindungsgemäßen Werkzeugs kostengünstig und einfach erreicht werden, indem

  • die einzelnen metallischen Komponenten der Ummantelung in Pulverform gemischt werden,
  • die Komponenten in Pulverform und die abrasiven Schneidkörper getrennt abgewogen werden,
  • ein Binder vorbereitet wird,
  • die metallischen Komponenten, die abrasiven Schneidkörper und der Binder vermischt und zu Granulat verarbeitet werden,
  • das Granulat und ein Pulver, welches das Bindematerial des Schneidbelags bildet, gemischt werden,
  • die Mischung aus Granulat und Pulver zu einem Grünling gepreßt wird und
  • beim Sintern die abrasiven Schneidkörper, die Ummantelung und das Bindematerial durch Diffusion und/oder durch eine chemische Reaktion zusammen verbunden werden.
Furthermore, the production of a tool according to the invention can be achieved inexpensively and simply by
  • the individual metallic components of the casing are mixed in powder form,
  • the components are powdered and the abrasive cutting bodies are weighed separately,
  • a binder is prepared
  • the metallic components, the abrasive cutting bodies and the binder are mixed and processed into granules,
  • the granules and a powder which forms the binding material of the cutting coating are mixed,
  • the mixture of granules and powder is pressed to a green compact and
  • during sintering, the abrasive cutting bodies, the cladding and the bonding material are bonded together by diffusion and / or by a chemical reaction.

Neben einem Granulierverfahren sind jedoch auch andere, dem Fachmann als sinnvoll erscheinende Verfahren zur Beschichtung bzw. zur Herstellung einer Ummantelung der abrasiven Schneidkörper denkbar, wie beispielsweise ein PVD-Verfahren (Physical Vapour Deposition, Physikalisches Dampfablagerungsverfahren), ein CVD-Verfahren (Chemical Vapour Deposition, Chemisches Dampfablagerungsverfahren) usw.In addition to a granulation process, however, a CVD method, other conceivable to the skilled person that appears reasonable method for coating or for the production of a coating of the abrasive cutting bodies, such as a PVD process (P hysical V apour D eposition, physical vapor deposition method), ( C hemical V apour D eposition, Chemical Vapor Deposition Procedure) etc.

Die erfindungsgemäße Lösung kann bei verschiedenen, dem Fachmann als sinnvoll erscheinenden Werkzeugen mit abrasiven Schneidkörpern eingesetzt werden, wie beispielsweise bei Bohrern, Schleifwerkzeugen und insbesondere bei Trennscheiben.The solution according to the invention can be used in various tools with abrasive cutters that appear useful to the person skilled in the art, such as, for example, drills, grinding tools and, in particular, cut-off wheels.

Zeichnungendrawings

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In den Zeichnungen ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnungen, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, an embodiment of the invention is shown. The drawings, the description and the claims include numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
eine erfindungsgemäße Diamant-Trennscheibe,
Fig. 2
eine vergrößerte Darstellung eines Schnitts entlang der Linie II-II in Fig. 1 und
Fig. 3
einen vergrößerten Ausschnitt III aus Fig. 2.
Show it:
Fig. 1
a diamond cutting disc according to the invention,
Fig. 2
an enlarged view of a section along the line II-II in Fig. 1 and
Fig. 3
an enlarged section III Fig. 2 ,

Beschreibung des AusführungsbeispielsDescription of the embodiment

Fig. 1 zeigt eine erfindungsgemäße Diamant-Trennscheibe 20 eines nicht näher dargestellten Trennschleifers mit einem Grundkörper 10 und einzelnen Segmenten 22. Die Segmente 22 weisen einen Schneidbelag 12 mit einem Bindematerial 14 auf, in dem in einem Freisintervorgang abrasive Schneidkörper 16, und zwar polykristalline Diamanten, fest eingebunden sind. Fig. 1 shows a diamond cutting wheel 20 according to the invention of a cutting grinder not shown with a base body 10 and individual segments 22. The segments 22 have a cutting pad 12 with a binding material 14, in which in a free sintering abrasive cutting body 16, namely polycrystalline diamonds firmly integrated are.

Erfindungsgemäß sind die Schneidkörper 16 jeweils mit einer Ummantelung 18 umgeben, die die Schneidkörper 16 während des Sintervorgangs schützen (Fig. 2 und Fig. 3).According to the invention, the cutting bodies 16 are each surrounded by a jacket 18 which protects the cutting bodies 16 during the sintering process ( Fig. 2 and Fig. 3 ).

Die Ummantelung 18 besitzt einen Bestandteil eines mit dem Schneidkörper 16 reaktiven Basismaterials und einen Bestandteil eines nichtreaktiven Materials. Das reaktive und das nichtreaktive Material bilden eine Cr-Ni-Cu Legierung, wobei Cr das Basismaterial und Ni sowie Cu das nichtreaktive Material bilden. Die einzelnen metallischen Komponenten werden in Pulverform gemischt. Anschließend werden die gemischten metallischen Komponenten und die Diamanten 16 in der benötigten Menge gewogen.The sheath 18 has a constituent of a base material reactive with the cutting body 16 and a constituent of a non-reactive material. The reactive and the non-reactive material form a Cr-Ni-Cu alloy, wherein Cr is the base material and Ni and Cu are the non-reactive material. The individual metallic components are mixed in powder form. Subsequently, the mixed metallic components and the diamonds 16 are weighed in the required amount.

Ein Binder, bestehend aus einem Kunststoffpulver und einem Isopropanol, wird zu einer Lösung zusammengerührt. Der pastenförmige Binder, die metallischen Komponenten und die Schneidkörper 16 werden anschließend vermischt und in einer Granuliermaschine zu Granulat verarbeitet. Dabei entsteht ein Granulat mit einer Größe zwischen 0,1 mm und 1,7 mm, wobei die Ummantelung 18 der Schneidkörper 16 eine Dicke von 0,001 mm bis 0,05 mm aufweist.A binder consisting of a plastic powder and an isopropanol is stirred into a solution. The paste-like binder, the metallic components and the cutting bodies 16 are then mixed and processed into granules in a granulating machine. This results in a granulate having a size between 0.1 mm and 1.7 mm, wherein the sheath 18 of the cutting body 16 has a thickness of 0.001 mm to 0.05 mm.

Das entstandene Granulat und ein metallisches Pulver, das das Bindematerial 14 des Schneidbelags 12 bildet, werden gemischt und zu einem Grünling gepreßt, der anschließend in einem Freisintervorgang bei 600°C bis 1200°C gesintert wird. Als Bindematerial 14 wurden insbesondere die Elemente aus den Gruppen 6, 9 und 11 des IUPAC Periodensystems oder eine Legierung aus diesen Elementen verwendet.The resulting granules and a metallic powder forming the bonding material 14 of the cutting pad 12 are mixed and pressed into a green compact, which is then sintered in a free sintering process at 600 ° C to 1200 ° C. The binding material 14 used was in particular the elements from Groups 6, 9 and 11 of the IUPAC Periodic Table or an alloy of these elements.

Das Basismaterial geht mit dem Schneidkörper 16 eine chemische Reaktion ein und verbindet sich mit diesem. Das nichtreaktive Material schützt den Schneidkörper 16 und verhindert einerseits weitgehend ein Zersetzen des Schneidkörpers 16 durch das Basismaterial und andererseits versintert das nichtreaktive Material mit dem Bindematerial 14 des Schneidbelags 12 und fördert den Halt des Schneidkörpers 16 in dem Bindematerial 14 bzw. in dem Schneidbelag 12. Die Ummantelung 18, die Schneidkörper 16 und das Bindematerial 14 sind nach dem Sintervorgang durch Diffusion miteinander fest verbunden.The base material enters into a chemical reaction with the cutting body 16 and combines with it. The non-reactive material protects the cutting body 16 and, on the one hand, largely prevents decomposition of the cutting body 16 by the base material and, on the other hand, sinters the non-reactive material with the binding material 14 of the cutting lining 12 and promotes the support of the cutting body 16 in the binding material 14 and in the cutting pad 12. The sheath 18, the cutting body 16 and the binding material 14 are firmly connected to each other after the sintering process by diffusion.

Bezugszeichenreference numeral

1010
Grundkörperbody
1212
Schneidbelagcutting layer
1414
Bindematerialbinding material
1616
Schneidkörpercutting body
1818
Ummantelungjacket
2020
Diamant-TrennscheibeDiamond cutting disc
2222
Segmentsegment

Claims (10)

  1. Tool for machine tools, with a basic body (10) and with a cutting coat (12) having a binding material (14) in which abrasive cutting bodies (16), in particular diamonds, are permanently incorporated in a sintering operation, at least one cutting body (16) being surrounded by a sheathing (18) which is in the form of an alloy and has at least one constituent of a basic material reactive with the cutting body (16) and at least one constituent of a non-reactive material and which protects the cutting body (16) during the sintering operation, characterized in that the non-reactive material of the sheathing (18) is sintered together with the binding material (14) of the cutting coat (12) in order to promote the hold of the cutting body (16) in the cutting coat (12).
  2. Tool according to Claim 1, characterized in that the sintering operation is a free-sintering operation.
  3. Tool according to Claims 1 and 2, characterized in that the basic material is a metal or an alloy from the groups 4, 5 and/or 6 of the IUPAC periodic system.
  4. Tool according to Claim 3, characterized in that the sheathing (18) has more non-reactive material than reactive material.
  5. Tool according to either one of Claims 3 and 4, characterized in that the non-reactive material is a metal or a metal alloy.
  6. Tool according to Claim 5, characterized in that the non-reactive material is formed from the groups 8, 9, 10, 11, 12, 13 and 14 of the IUPAC periodic system.
  7. Tool according to Claim 6, characterized in that the sheathing (18) has 10-30% Cr, 50-70% Ni and 10-30% Cu in relation to the reactive and non-reactive material.
  8. Tool according to one of the preceding claims, characterized in that at least individual cutting bodies (16) are at least carbon-containing.
  9. Tool according to one of the preceding claims, characterized in that different abrasive cutting bodies (16) are combined with one another.
  10. Method for producing a tool according to one of the preceding claims, characterized in that
    - the individual metallic components of the sheathing (18) are mixed in powder form, and
    - the components in powder form and the abrasive cutting bodies (16) are weighed separately,
    - a binder is prepared,
    - the metallic components, the abrasive cutting bodies (16) and the binder are mixed together and processed into granulated material,
    - the granulated material and a powder which forms the binding material (14) of the cutting coat (12) are mixed,
    - the mixture of granulated material and powder is pressed into a green compact, and,
    - during sintering, the abrasive cutting bodies (16), the sheathing (18) and the binding material (14) are connected together by means of diffusion and/or by means of a chemical reaction.
EP02748697A 2001-06-20 2002-05-10 Tool for machine tools Expired - Lifetime EP1402080B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10129599 2001-06-20
DE10129599A DE10129599A1 (en) 2001-06-20 2001-06-20 Tool for machine tools
PCT/EP2002/005156 WO2003000943A2 (en) 2001-06-20 2002-05-10 Tool for machine tools, which comprises cutting bodies

Publications (2)

Publication Number Publication Date
EP1402080A2 EP1402080A2 (en) 2004-03-31
EP1402080B1 true EP1402080B1 (en) 2009-09-23

Family

ID=7688733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02748697A Expired - Lifetime EP1402080B1 (en) 2001-06-20 2002-05-10 Tool for machine tools

Country Status (7)

Country Link
EP (1) EP1402080B1 (en)
JP (1) JP2004520957A (en)
KR (1) KR100895962B1 (en)
CN (1) CN1272455C (en)
AT (1) ATE443779T1 (en)
DE (2) DE10129599A1 (en)
WO (1) WO2003000943A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9238277B2 (en) 2009-09-04 2016-01-19 Insstek, Inc. Cutting/polishing tool and manufacturing method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101791788B (en) * 2009-11-17 2013-02-06 博深工具股份有限公司 Preparation method of cold pressing sintered diamond millstone
CN105904597B (en) * 2016-05-23 2018-06-08 江苏华昌工具制造有限公司 Pressureless sintering dry chip

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062865A (en) * 1987-12-04 1991-11-05 Norton Company Chemically bonded superabrasive grit
US5024680A (en) * 1988-11-07 1991-06-18 Norton Company Multiple metal coated superabrasive grit and methods for their manufacture
JPH03277472A (en) * 1990-03-27 1991-12-09 Sumitomo Metal Ind Ltd Diamond grinding wheel
US5188643A (en) * 1991-08-01 1993-02-23 General Electric Company Method of applying metal coatings on cubic boron nitride and articles made therefrom
JP3787602B2 (en) * 1995-05-08 2006-06-21 住友電工ハードメタル株式会社 Sintered diamond particles, coated particles, compacts and methods for producing them
DE19844397A1 (en) * 1998-09-28 2000-03-30 Hilti Ag Abrasive cutting bodies containing diamond particles and method for producing the cutting bodies
JP2000141230A (en) * 1998-11-13 2000-05-23 Mitsubishi Materials Corp Metal bond grindstone and its manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9238277B2 (en) 2009-09-04 2016-01-19 Insstek, Inc. Cutting/polishing tool and manufacturing method thereof
US9764442B2 (en) 2009-09-04 2017-09-19 Insstek, Inc. Cutting/polishing tool and manufacturing method thereof

Also Published As

Publication number Publication date
KR20030034148A (en) 2003-05-01
EP1402080A2 (en) 2004-03-31
DE10129599A1 (en) 2003-01-09
WO2003000943A2 (en) 2003-01-03
JP2004520957A (en) 2004-07-15
KR100895962B1 (en) 2009-05-07
ATE443779T1 (en) 2009-10-15
WO2003000943A3 (en) 2003-04-24
CN1272455C (en) 2006-08-30
DE50213872D1 (en) 2009-11-05
CN1518605A (en) 2004-08-04

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