EP2391482B1 - Grinding wheel comprising vegetable seeds as filling material and manufacturing method - Google Patents

Grinding wheel comprising vegetable seeds as filling material and manufacturing method Download PDF

Info

Publication number
EP2391482B1
EP2391482B1 EP10701675.0A EP10701675A EP2391482B1 EP 2391482 B1 EP2391482 B1 EP 2391482B1 EP 10701675 A EP10701675 A EP 10701675A EP 2391482 B1 EP2391482 B1 EP 2391482B1
Authority
EP
European Patent Office
Prior art keywords
abrasive disk
abrasive
plant seeds
binder
previous
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.)
Not-in-force
Application number
EP10701675.0A
Other languages
German (de)
French (fr)
Other versions
EP2391482A1 (en
Inventor
Josef Keuler
Christian Stang
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.)
Rhodius Schleifwerkzeuge GmbH and Co KG
Original Assignee
Rhodius Schleifwerkzeuge GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhodius Schleifwerkzeuge GmbH and Co KG filed Critical Rhodius Schleifwerkzeuge GmbH and Co KG
Priority to PL10701675T priority Critical patent/PL2391482T3/en
Publication of EP2391482A1 publication Critical patent/EP2391482A1/en
Application granted granted Critical
Publication of EP2391482B1 publication Critical patent/EP2391482B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • B24D3/32—Resins or natural or synthetic macromolecular compounds for porous or cellular structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/348—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised as impregnating agent for porous abrasive bodies

Definitions

  • the present invention relates to a resin-bonded grinding wheel using seed pods as a pore-forming agent, and to a method for producing such grinding wheels.
  • a grinding wheel consists essentially of abrasive grain, binder material and pore space.
  • the pore space is composed of the natural interstices that arise between the abrasive grains and the pores introduced into the grinding wheel by pore formers.
  • the pores are also influenced in size and number by the pressing pressure. This results in a low pore space at high pressure, while a low pressure results in a correspondingly larger pore space.
  • a low compression pressure also requires a softer disc.
  • other fillers in grinding wheels can also be used. These may be abrasive (e.g., cooling), thus assisting the grinding process or serving to stabilize (burst resistance, flexibility) the grinding wheel.
  • the fineness of the forming during the grinding process chip or the roughness of the material surface depends essentially on the size of the abrasive grain.
  • Abrasive grains usually consist of hard, brittle materials and are routinely used in a wide range of sizes.
  • the binder material may be a synthetic resin as in the present application. It serves to hold the individual abrasive grains together. The pore space makes it possible, among other things, to remove the material chip safely, but it can also be used to hold coolant.
  • the properties of the grinding wheel can be adjusted, so that one can achieve the desired grinding results for each material to be processed.
  • a ceramic bonded grinding wheel which can be produced in a single firing process and thereby manages without the use of a binder.
  • Walnut shells, plastic beads or foamed organic material are used as pore formers.
  • the starting material used is a sol gel based on boehmite seed crystals, which is mixed with walnut shells of an average size of 275 ⁇ m. Subsequently, this mixture is poured into the desired shape, dried and finally fired at a maximum temperature of 1300 ° C.
  • the boehmite crystallizes to ⁇ -alumina.
  • the walnut shells burn without residue at these high temperatures and therefore leave pores in the grinding wheel.
  • the final product has a porosity of about 40% and is sufficiently stable to be used as a grinding wheel.
  • a grinding wheel consisting of a combination of pore formers, namely hollow alumina spheres and organic pore former, and a sol gel of alumina abrasive grains.
  • the organic pore former may be made from nutshells, carbon, flower seeds, starch, sugar or wood particles.
  • the organic pore-forming agent completely decomposes on firing of the grinding wheel, leaving open pores in the grinding wheel.
  • the resulting achieved porosity of the grinding wheel is about 1 to 12% of its volume.
  • the temperature-resistant, hollow, thin-walled aluminum oxide beads give the grinding wheel, as closed pores, additional porosity of up to 70% and at the same time ensure sufficient stability.
  • the problem here is, however, that these closed pores can absorb coolant, but are usually not able to remove sanding chip.
  • the DE 602 06 661 T2 describes an impregnated vitreous bonded grinding wheel which is impregnated with a sulfur-containing organic substance as a grinding aid.
  • This impregnating agent is a hydrocarbon compound having at least one carbon-sulfur bond.
  • Organic substances, such as nutshells, resins or wood flour, may be used as pore formers, but they should burn without residue at the specified firing temperature of 538 to 1371 ° C. (1000 to 2500 ° F.) during the firing process.
  • Pore formers are a variety of substances, such as wood, hemp, flax, paper and grains called various types. However, these pore formers burn in the process described during the firing process.
  • the stoneware produced by this process is suitable, inter alia, for use as artificial millstones in grain mills.
  • the DE 10 2004 035 088 A1 describes an organically bonded cutting disc with a functional additive.
  • the abrasive article comprises a binder (phenolic resins, epoxy resins, imides), abrasive grain and at least one functional filler.
  • the functional filler here is a metal alloy, which can be selected depending on the material to be processed. In the production, a firing temperature in the range of 150 ° C to 250 ° C is applied, and the curing takes a total of 12 to 76 hours.
  • the DE 697 05 538 T2 describes abrasive articles and methods for their manufacture.
  • the binders used include phenolic resins and epoxy resins.
  • the abrasive grain used has diameters of about 1 ⁇ m to about 10 mm. The curing of these grinding wheels takes place over a period of 8 to 15 hours at temperatures of 66 to 120 ° C.
  • the DE 102 97 124 T5 describes a method of making a vitrified superabrasive tool that selects a fritted glass bonding composition
  • Superabrasive ingredient, a filler component with hollow bodies and the glass bonding composition are combined, and the combined components are fired at about 600 to 850 ° C.
  • Object of the present invention is to provide resin-bonded grinding wheels, which have long service life, do not clog and have a cool cut.
  • this object is achieved in that the plant seeds are included in the finished grinding wheel.
  • the grinding wheel consists of a mixture of abrasive grain, binder and pore-forming agent, wherein the pore-forming agents are plant seeds, and the plant seeds are not burned during production, but are included in the finished grinding wheel.
  • the plant seeds are used in the production of the grinding wheel as organic pore formers.
  • the plant seeds are not - as in the production of ceramic bonded grinding wheels usual - burned during manufacture, but remain intact and form an important part of the finished grinding wheel.
  • the plant seeds have several functions. They have as part of the grinding wheel a certain support effect, which prevents the early breaking out of the abrasive grain. In addition to this support function, however, the plant seeds can also fulfill the task of conventional pores and provide, for example, for the removal of the grinding chips. Since the plant seeds are relatively soft, they can be deformed by the usually harder grinding chips, and then transport them away in the newly formed pore space. It is also possible that the hot grinding chips, which have temperatures of between 1500 ° C and 2000 ° C, the plant seeds Burn grinding process. The resulting pore space is then comparable to that of a conventional pore and can accordingly serve for the removal of the sanding chip. In addition, when grinding non-ferrous metals by the addition of pore formers in the form of plant seeds, the clogging of the disc can be prevented.
  • An advantage of the present invention is that there are natural plant seeds in various shapes and sizes, so that the porosity of the grinding tool can be adapted almost arbitrarily. This is particularly important because the size of the resulting chip may vary depending on the size of the abrasive grain and the nature of the workpiece.
  • the resin-bonded abrasive wheel of the present invention consists of 60 to 90% by weight of abrasive grain and 10 to 40% by weight of binder.
  • the plant seeds can make up to 80% by weight of the binder.
  • various other known fillers can be used.
  • abrasive materials commonly used as abrasive grains are suitable as abrasive grains. These include corundum, silicon carbides, chromium oxides, cubic boron nitride, diamonds, silicon oxides, zirconium oxides, garnet and emery, and mixtures thereof.
  • the abrasive grains may have different sizes in the range of 0.5 ⁇ m to 5000 ⁇ m.
  • the size and the material of the abrasive grains can be selected depending on the workpiece to be machined.
  • the abrasive grain has a particle size of 105 microns to 2830 microns, more preferably from 250 microns to 2830 microns.
  • oily seeds such as rapeseed are used.
  • the oil contained in the plant seeds causes a lubricating effect, ie the oil reduces the friction of the abrasive grain during chip formation and thus reduces the heat development during grinding.
  • the oil increases the service life of the grinding wheel and on the other hand the workpiece before protected against undesired hardening.
  • the binder is a mixture of a synthetically produced polymeric compound and fillers.
  • the polymeric compound may be synthetic resin, which may be used both in liquid form and in powder form. Suitable resins are, for example, polyimides, phenolic resins, epoxy resins, unsaturated polyesters, and the like.
  • the invention also relates to a method for producing the grinding wheels according to the invention.
  • a free-flowing mixture of abrasive grain, binder and plant seeds is produced. This mixture is poured evenly into a preformed mold and then pressed to a predetermined volume. The pellet then undergoes a curing program in an oven, exposing it to temperatures of up to 250 ° C. The pressing and curing of the grinding wheel can also be done in one step.
  • the grinding wheel mixture is filled into a mold under extremely even distribution.
  • the compact is used in a conventional press, for example a hydraulic press, under pressing pressures of 15 to 45 N / mm 2 , preferably 20 to 35 N / mm 2 , more preferably pressed from 30 N / mm 2 to form a green compact.
  • the pressing time can be in the range of 1 to 100 seconds, preferably 5-50 seconds.
  • additional reinforcements eg glass fabric
  • the pressing operation is carried out at room temperature.
  • the green compact is then cured at elevated temperature.
  • the curing process takes place in chamber or tunnel ovens.
  • the temperature can be controlled automatically by the program controller.
  • the selection of a suitable curing program depends on one A series of factors such as the dimensions and structure of the disk, the filler content, the resin bond rate and the resin properties.
  • the temperature at which curing occurs, we selected so that the plant seeds present in the green plant do not burn.
  • the pellets are first pre-dried at temperatures between 50 ° C and 100 ° C and then at temperatures of up to 250 ° C, preferably up to 200 ° C, more preferably up to 180 ° C and in particular up to 150 ° C cured, whereby they get their final shape and texture.
  • the curing process lasts between 5 and 40 hours, preferably between 10 and 30 hours and more preferably 15 hours.
  • abrasive grain with a grain size of 36 ( ⁇ 500 ⁇ m) is first premixed in a mixer.
  • Resol liquid phenolic resin
  • the abrasive grain is evenly moistened and coated with a thin film of resin.
  • a mixture of powdered phenolic resin, poppy seeds and cryolite is added.
  • the recipe is composed as follows:
  • the mixing process is continued until the desired homogeneous consistency is achieved.
  • the grinding wheel mixture should not be too dry but dust-free and free-flowing. After its completion will be the mixture sieved and deposited for several hours.
  • the press mixture is accurately weighed and conveyed by means of sliders in the mold.
  • the mixture is filled into the mold with extremely even distribution.
  • the compact is pressed in a conventional press, under a pressure of 30 N / mm 2 within a few seconds cold to a green compact. In order to increase the structural integrity of the grinding wheel while three tissues are mitverpresst.
  • the green compact produced is clamped between metal discs and fired over a multi-stage curing profile up to a temperature of 180 ° C for a total of 15 hours. After firing, the finished grinding wheel is removed between the metal plates.
  • the finished disc measures 125 x 7 x 22.23 mm and has a pleasantly cool finish.

Description

Technisches GebietTechnical area

Die vorliegende Erfindung betrifft eine kunstharzgebundene Schleifscheibe, bei der pflanzliche Samenkapseln als Porenbildner verwendet werden, sowie ein Verfahren zur Herstellung solcher Schleifscheiben.The present invention relates to a resin-bonded grinding wheel using seed pods as a pore-forming agent, and to a method for producing such grinding wheels.

Eine Schleifscheibe besteht im Wesentlichen aus Schleifkorn, Bindermaterial und Porenraum. Der Porenraum setzt sich aus den natürlichen Zwischenräumen, die sich zwischen den Schleifkörnern ergeben, sowie den durch Porenbildner in die Schleifscheibe eingebrachten Poren zusammen. Zusätzlich zur Rezeptur werden die Poren in Größe und Anzahl auch durch den Pressdruck beeinflusst. So entsteht bei hohem Druck ein geringer Porenraum, während ein niedriger Druck einen entsprechend größeren Porenraum zur Folge hat. Ein niedriger Pressdruck bedingt allerdings auch eine weichere Scheibe. Neben Porenbildnern können auch noch weitere Füllstoffe in Schleifscheiben verwendet werden. Diese können schleifaktiv sein (z.B. Kühlung) und damit den Schleifprozess unterstützen oder der Stabilisierung (Berstfestigkeit, Flexibilität) der Schleifscheibe dienen.A grinding wheel consists essentially of abrasive grain, binder material and pore space. The pore space is composed of the natural interstices that arise between the abrasive grains and the pores introduced into the grinding wheel by pore formers. In addition to the recipe, the pores are also influenced in size and number by the pressing pressure. This results in a low pore space at high pressure, while a low pressure results in a correspondingly larger pore space. However, a low compression pressure also requires a softer disc. In addition to pore-forming agents, other fillers in grinding wheels can also be used. These may be abrasive (e.g., cooling), thus assisting the grinding process or serving to stabilize (burst resistance, flexibility) the grinding wheel.

Die Feinheit des sich beim Schleifprozess bildenden Spans bzw. die Rauhigkeit der Werkstoffoberfläche hängt im Wesentlichen von der Größe des Schleifkorns ab. Schleifkörner bestehen meist aus harten, spröden Materialien und werden routinemäßig in einem weiten Größenbereich eingesetzt. Das Bindermaterial kann wie in der vorliegenden Anmeldung ein Kunstharz sein. Es dient dazu die einzelnen Schleifkörner zusammenzuhalten. Der Porenraum ermöglicht es unter anderem, den Werkstoffspan sicher abzutransportieren, kann aber auch dazu genutzt werden, Kühlmittel aufzunehmen. Durch Variation des Volumenverhältnisses der einzelnen Komponenten zueinander lassen sich die Eigenschaften der Schleifscheibe einstellen, so dass man für jedes zu bearbeitende Material die gewünschten Schleifergebnisse erzielen kann.The fineness of the forming during the grinding process chip or the roughness of the material surface depends essentially on the size of the abrasive grain. Abrasive grains usually consist of hard, brittle materials and are routinely used in a wide range of sizes. The binder material may be a synthetic resin as in the present application. It serves to hold the individual abrasive grains together. The pore space makes it possible, among other things, to remove the material chip safely, but it can also be used to hold coolant. By varying the volume ratio of the individual components to each other, the properties of the grinding wheel can be adjusted, so that one can achieve the desired grinding results for each material to be processed.

Stand der TechnikState of the art

Organische Porenbildner werden bisher nur in keramisch gebundenen Schleifscheiben eingesetzt.Organic pore formers have hitherto been used only in ceramic-bonded grinding wheels.

In der US 5,221,294 A ist eine keramisch gebundene Schleifscheibe beschrieben, welche in einem einzigen Brennvorgang hergestellt werden kann und dabei ohne die Verwendung eines Bindemittels auskommt. Als Porenbildner werden unter anderem Walnussschalen, Kunststoffkügelchen oder geschäumtes organisches Material verwendet. Als Ausgangsprodukt dient ein Sol-Gel auf Basis von Böhmit-Kristallkeimen, welches mit Walnussschalen einer durchschnittlichen Größe von 275 µm vermischt wird. Anschließend wird diese Mischung in die gewünschte Form gegossen, getrocknet und schließlich bei einer maximalen Temperatur von 1300 °C gebrannt. Dabei kristallisiert das Böhmit zu α-Aluminiumoxid. Die Walnussschalen verbrennen bei diesen hohen Temperaturen rückstandslos und hinterlassen daher Poren in der Schleifscheibe. Das Endprodukt besitzt eine Porosität von etwa 40 % und ist ausreichend stabil, um als Schleifscheibe eingesetzt zu werden.In the US 5,221,294 A is described a ceramic bonded grinding wheel, which can be produced in a single firing process and thereby manages without the use of a binder. Walnut shells, plastic beads or foamed organic material are used as pore formers. The starting material used is a sol gel based on boehmite seed crystals, which is mixed with walnut shells of an average size of 275 μm. Subsequently, this mixture is poured into the desired shape, dried and finally fired at a maximum temperature of 1300 ° C. The boehmite crystallizes to α-alumina. The walnut shells burn without residue at these high temperatures and therefore leave pores in the grinding wheel. The final product has a porosity of about 40% and is sufficiently stable to be used as a grinding wheel.

In der US 5,203,886 A wird eine Schleifscheibe beschrieben, die aus einer Kombination von Porenbildnern, nämlich hohlen Aluminiumoxidkügelchen und organischem Porenbildner, sowie einem Sol-Gel aus Aluminiumoxid-Schleifkörnern besteht. Der organische Porenbildner kann aus Nussschalen, Kohlenstoff, Blumensamen, Stärke, Zucker oder Holzteilchen hergestellt sein. Der organische Porenbildner zersetzt sich beim Brennen der Schleifscheibe komplett und hinterlässt dabei offene Poren in der Schleifscheibe. Die dadurch erreichte Porosität der Schleifscheibe beträgt etwa 1 bis 12 % ihres Volumens. Die temperaturbeständigen, hohlen, dünnwandigen Aluminiumoxidkügelchen verleihen der Schleifscheibe als geschlossene Poren zusätzliche Porosität von bis zu 70 % und sorgen dabei gleichzeitig für ausreichend Stabilität. Problematisch ist hierbei allerdings, dass diese geschlossenen Poren zwar Kühlmittel aufnehmen können, aber für gewöhnlich nicht in der Lage sind Schleifspan abzutransportieren.In the US 5,203,886 A There is described a grinding wheel consisting of a combination of pore formers, namely hollow alumina spheres and organic pore former, and a sol gel of alumina abrasive grains. The organic pore former may be made from nutshells, carbon, flower seeds, starch, sugar or wood particles. The organic pore-forming agent completely decomposes on firing of the grinding wheel, leaving open pores in the grinding wheel. The resulting achieved porosity of the grinding wheel is about 1 to 12% of its volume. The temperature-resistant, hollow, thin-walled aluminum oxide beads give the grinding wheel, as closed pores, additional porosity of up to 70% and at the same time ensure sufficient stability. The problem here is, however, that these closed pores can absorb coolant, but are usually not able to remove sanding chip.

Die DE 602 06 661 T2 beschreibt eine imprägnierte glasartig gebundene Schleifscheibe, die mit einer schwefelhaltigen organischen Substanz als Schleifhilfsstoff imprägniert ist. Dieses Imprägniermittel ist eine Kohlenwasserstoffverbindung mit mindestens einer Kohlenstoff-Schwefel-Bindung. Als Porenbildner können unter anderem auch organische Stoffe, wie Nussschalen, Harze oder Holzmehl, verwendet werden, die jedoch bei der angegebenen Brenntemperatur von 538 bis 1371°C (1000 bis 2500°F) während dem Brennvorgang rückstandslos verbrennen dürften.The DE 602 06 661 T2 describes an impregnated vitreous bonded grinding wheel which is impregnated with a sulfur-containing organic substance as a grinding aid. This impregnating agent is a hydrocarbon compound having at least one carbon-sulfur bond. Organic substances, such as nutshells, resins or wood flour, may be used as pore formers, but they should burn without residue at the specified firing temperature of 538 to 1371 ° C. (1000 to 2500 ° F.) during the firing process.

In der DE 12 943 A geht es um ein Verfahren, um poröses Porzellan, Steingut oder Ton herzustellen. Als Porenbildner werden eine Vielzahl von Stoffen, so wie Holz, Hanf, Flachs, Papier und Körner verschiedener Art genannt. Diese Porenbildner verbrennen allerdings bei dem beschriebenen Verfahren während des Brennprozesses. Das nach diesem Verfahren hergestellte Steingut eignet sich unter anderem zur Verwendung als künstliche Mühlsteine in Getreidemühlen.In the DE 12 943 A It's about a process to make porous porcelain, earthenware or clay. Pore formers are a variety of substances, such as wood, hemp, flax, paper and grains called various types. However, these pore formers burn in the process described during the firing process. The stoneware produced by this process is suitable, inter alia, for use as artificial millstones in grain mills.

Die DE 10 2004 035 088 A1 beschreibt eine organisch gebundene Trennscheibe mit einem funktionellen Additiv. Der Schleifkörper umfasst ein Bindemittel (Phenolharze, Epoxidharze, Imide), Schleifkorn und mindestens einen funktionellen Füllstoff. Der funktionelle Füllstoff ist hierbei eine Metalllegierung, die in Abhängigkeit von dem zu bearbeitenden Werkstoff gewählt werden kann. Bei der Herstellung wird eine Brenntemperatur im Bereich von 150°C bis 250°C angewandt, und der Aushärtevorgang dauert insgesamt 12 bis 76 Stunden.The DE 10 2004 035 088 A1 describes an organically bonded cutting disc with a functional additive. The abrasive article comprises a binder (phenolic resins, epoxy resins, imides), abrasive grain and at least one functional filler. The functional filler here is a metal alloy, which can be selected depending on the material to be processed. In the production, a firing temperature in the range of 150 ° C to 250 ° C is applied, and the curing takes a total of 12 to 76 hours.

Die DE 697 05 538 T2 beschreibt abrasive Gegenstände und Verfahren zu deren Herstellung. Als Bindemittel kommen unter anderem Phenolharze und Epoxidharze zum Einsatz. Das verwendete Schleifkorn hat Durchmesser von etwa 1 µm bis etwa 10 mm. Das Aushärten dieser Schleifscheiben erfolgt über einen Zeitraum von 8 bis 15 Stunden bei Temperaturen von 66 bis 120°C.The DE 697 05 538 T2 describes abrasive articles and methods for their manufacture. The binders used include phenolic resins and epoxy resins. The abrasive grain used has diameters of about 1 μm to about 10 mm. The curing of these grinding wheels takes place over a period of 8 to 15 hours at temperatures of 66 to 120 ° C.

Die DE 102 97 124 T5 beschreibt ein Verfahren zur Herstellung eines verglasten Werkzeugs mit Superschleifmittel, bei dem eine gefrittete Glasbindungszusammensetzung ausgewählt wird, ein Superschleifmittelbestandteil, ein Füllmittelbestandteil mit Hohlkörpern und die Glasbindungszusammensetzung kombiniert werden, und die kombinierten Bestandteile bei etwa 600 bis 850°C gebrannt werden.The DE 102 97 124 T5 describes a method of making a vitrified superabrasive tool that selects a fritted glass bonding composition Superabrasive ingredient, a filler component with hollow bodies and the glass bonding composition are combined, and the combined components are fired at about 600 to 850 ° C.

Darstellung der ErfindungPresentation of the invention Technische AufgabeTechnical task

Aufgabe der vorliegenden Erfindung ist es, kunstharzgebundene Schleifscheiben bereitzustellen, die hohe Standzeiten aufweisen, sich nicht zusetzen und einen kühlen Schliff haben.Object of the present invention is to provide resin-bonded grinding wheels, which have long service life, do not clog and have a cool cut.

Technische LösungTechnical solution

Bei einer Schleifscheibe der eingangs genannten Art, wird diese Aufgabe dadurch gelöst, dass die Pflanzensamen in der fertig gestellten Schleifscheibe enthalten sind.In a grinding wheel of the type mentioned, this object is achieved in that the plant seeds are included in the finished grinding wheel.

Die Schleifscheibe besteht aus einer Mischung von Schleifkorn, Bindemittel und Porenbildner, wobei die Porenbildner Pflanzensamen sind, und die Pflanzensamen bei der Herstellung nicht verbrannt werden, sondern in der fertig gestellten Schleifscheibe enthalten sind.The grinding wheel consists of a mixture of abrasive grain, binder and pore-forming agent, wherein the pore-forming agents are plant seeds, and the plant seeds are not burned during production, but are included in the finished grinding wheel.

Die Pflanzensamen werden bei der Herstellung der Schleifscheibe als organische Porenbildner verwendet. Die Pflanzensamen werden dabei nicht - wie bei der Herstellung von keramisch gebundenen Schleifscheiben üblich - bei der Herstellung verbrannt, sondern bleiben intakt und bilden einen wichtigen Bestandteil der fertig gestellten Schleifscheibe.The plant seeds are used in the production of the grinding wheel as organic pore formers. The plant seeds are not - as in the production of ceramic bonded grinding wheels usual - burned during manufacture, but remain intact and form an important part of the finished grinding wheel.

Den Pflanzensamen kommen dabei mehrere Funktionen zu. Sie besitzen als Bestandteil der Schleifscheibe eine gewisse Stützwirkung, die das frühzeitige Ausbrechen des Schleifkorns verhindert. Neben dieser Stützfunktion können die Pflanzensamen allerdings auch die Aufgabe von herkömmlichen Poren erfüllen und zum Beispiel für den Abtransport der Schleifspäne sorgen. Da die Pflanzensamen relativ weich sind, können sie von den zumeist härteren Schleifspänen verformt werden, und diese dann in dem neu entstandenen Porenraum abtransportieren. Es ist auch möglich, dass die heißen Schleifspäne, welche Temperaturen von zwischen 1500 °C und 2000 °C besitzen, die Pflanzensamen beim Schleifvorgang verbrennen. Der dabei entstehende Porenraum ist dann vergleichbar mit dem einer herkömmlichen Pore und kann dementsprechend zum Abtransport des Schleifspans dienen. Zusätzlich kann beim Schleifen von NE-Metallen durch den Zusatz von Porenbildnern in Form von pflanzlichen Samen das Zusetzen der Scheibe verhindert werden.The plant seeds have several functions. They have as part of the grinding wheel a certain support effect, which prevents the early breaking out of the abrasive grain. In addition to this support function, however, the plant seeds can also fulfill the task of conventional pores and provide, for example, for the removal of the grinding chips. Since the plant seeds are relatively soft, they can be deformed by the usually harder grinding chips, and then transport them away in the newly formed pore space. It is also possible that the hot grinding chips, which have temperatures of between 1500 ° C and 2000 ° C, the plant seeds Burn grinding process. The resulting pore space is then comparable to that of a conventional pore and can accordingly serve for the removal of the sanding chip. In addition, when grinding non-ferrous metals by the addition of pore formers in the form of plant seeds, the clogging of the disc can be prevented.

Vorteilhafte WirkungenAdvantageous effects

Ein Vorteil der vorliegenden Erfindung ist, dass es natürliche Pflanzensamen in den verschiedensten Formen und Größen gibt, so dass die Porosität des Schleifwerkzeugs nahezu beliebig angepasst werden kann. Dies ist besonders wichtig, weil die Größe des entstehenden Spans je nach Größe des Schleifkorns und je nach Beschaffenheit des Werkstückes unterschiedlich sein kann.An advantage of the present invention is that there are natural plant seeds in various shapes and sizes, so that the porosity of the grinding tool can be adapted almost arbitrarily. This is particularly important because the size of the resulting chip may vary depending on the size of the abrasive grain and the nature of the workpiece.

Die harzgebundene Schleifscheibe der vorliegenden Erfindung besteht zu 60 bis 90 Gew.-% aus Schleifkorn und zu 10 bis 40 Gew.-% aus Binder. Die Pflanzensamen können bis zu 80 Gew.-% des Binders ausmachen. Daneben können auch verschiedene andere bekannte Füllstoffe zum Einsatz kommen.The resin-bonded abrasive wheel of the present invention consists of 60 to 90% by weight of abrasive grain and 10 to 40% by weight of binder. The plant seeds can make up to 80% by weight of the binder. In addition, various other known fillers can be used.

Als Schleifkorn eignen sich im Wesentlichen alle üblicherweise als Schleifkorn verwendeten Materialien. Diese umfassen Korunde, Siliziumkarbide, Chromoxide, kubisches Bornitrid, Diamanten, Siliziumoxide, Zirkonoxide, Granat und Schmirgel, sowie Mischungen daraus. Die Schleifkörner können unterschiedliche Größen im Bereich von 0,5 µm bis 5000 µm haben. Die Größe sowie das Material der Schleifkörner kann in Abhängigkeit des zu bearbeitenden Werkstücks gewählt werden. Vorzugsweise hat das Schleifkorn eine Korngröße von 105 µm bis 2830 µm, noch bevorzugter von 250 µm bis 2830 µm.Essentially all abrasive materials commonly used as abrasive grains are suitable as abrasive grains. These include corundum, silicon carbides, chromium oxides, cubic boron nitride, diamonds, silicon oxides, zirconium oxides, garnet and emery, and mixtures thereof. The abrasive grains may have different sizes in the range of 0.5 μm to 5000 μm. The size and the material of the abrasive grains can be selected depending on the workpiece to be machined. Preferably, the abrasive grain has a particle size of 105 microns to 2830 microns, more preferably from 250 microns to 2830 microns.

In einer bevorzugten Ausführungsform kommen ölhaltige Samen, wie z.B. Rapssamen, zum Einsatz. Durch das in den Pflanzensamen enthaltene Öl kommt es zu einem Schmiereffekt, d.h. das Öl reduziert die Reibung des Schleifkorns bei der Spanbildung und verringert damit die Wärmeentwicklung beim Schleifen. Dadurch wird zum einen die Standzeit der Schleifscheibe erhöht und zum anderen das Werkstück vor unerwünschter Aufhärtung geschützt.In a preferred embodiment, oily seeds such as rapeseed are used. The oil contained in the plant seeds causes a lubricating effect, ie the oil reduces the friction of the abrasive grain during chip formation and thus reduces the heat development during grinding. As a result, on the one hand increases the service life of the grinding wheel and on the other hand the workpiece before protected against undesired hardening.

Neben ölhaltigen Pflanzensamen können auch Mohn-, Klee-, Lupinen-, Senf-, Seradella- oder Wickensamen oder ähnliche Pflanzensamen verwendet werden.In addition to oil-containing plant seeds, poppy, clover, lupine, mustard, seradella or wicker seeds or similar plant seeds may also be used.

Das Bindemittel ist eine Mischung aus einer synthetisch hergestellten, polymeren Verbindung und Füllstoffen. Die polymere Verbindung kann Kunstharz sein, das sowohl in flüssiger Form als auch pulverförmig verwendet werden kann. Geeignete Harze sind zum Beispiel Polyimide, Phenolharze, Epoxidharze, ungesättigte Polyester, und dergleichen.The binder is a mixture of a synthetically produced polymeric compound and fillers. The polymeric compound may be synthetic resin, which may be used both in liquid form and in powder form. Suitable resins are, for example, polyimides, phenolic resins, epoxy resins, unsaturated polyesters, and the like.

Herstellungsverfahrenproduction method

Die Erfindung betrifft auch ein Verfahren zur Herstellung der erfindungsgemäßen Schleifscheiben. Dabei wird zunächst eine rieselfähige Mischung aus Schleifkorn, Binder und Pflanzensamen hergestellt. Diese Mischung wird gleichmäßig in eine vorgefertigte Pressform eingefüllt und anschließend auf ein vorher festgelegtes Volumen gepresst. Anschließend durchläuft der Pressling in einem Ofen ein Aushärteprogramm, wobei er Temperaturen von bis zu 250°C ausgesetzt wird. Das Pressen und Aushärten der Schleifscheibe kann dabei auch in einem Schritt erfolgen.The invention also relates to a method for producing the grinding wheels according to the invention. First, a free-flowing mixture of abrasive grain, binder and plant seeds is produced. This mixture is poured evenly into a preformed mold and then pressed to a predetermined volume. The pellet then undergoes a curing program in an oven, exposing it to temperatures of up to 250 ° C. The pressing and curing of the grinding wheel can also be done in one step.

Die Schleifscheibenmischung wird unter äußerst gleichmäßiger Verteilung in eine Pressform eingefüllt. Anschließend wird der Pressling in einer gebräuchlichen Presse, z.B. einer hydraulischen Presse, unter Pressdrücken von 15 bis 45 N/mm2, vorzugsweise 20 bis 35 N/mm2 eingesetzt, noch vorzugsweise von 30 N/mm2 zu einem Grünling verpresst. Die Pressdauer kann im Bereich von 1 bis 100 Sekunden vorzugsweise 5-50 Sekunden liegen. Zur Steigerung der strukturellen Integrität der Schleifscheibe können zusätzliche Armierungen (z.B. Glasgewebe) mitverpresst werden. Vorzugsweise wird der Pressvorgang bei Raumtemperatur durchgeführt.The grinding wheel mixture is filled into a mold under extremely even distribution. Subsequently, the compact is used in a conventional press, for example a hydraulic press, under pressing pressures of 15 to 45 N / mm 2 , preferably 20 to 35 N / mm 2 , more preferably pressed from 30 N / mm 2 to form a green compact. The pressing time can be in the range of 1 to 100 seconds, preferably 5-50 seconds. To increase the structural integrity of the grinding wheel, additional reinforcements (eg glass fabric) can be co-pressed. Preferably, the pressing operation is carried out at room temperature.

Der Grünling wird dann bei erhöhter Temperatur ausgehärtet. Der Aushärteprozess erfolgt in Kammer- oder Tunnelöfen. Die Temperatur kann dabei durch Programmregler automatisch gesteuert werden. Die Auswahl eines geeigneten Härtungsprogramms ist abhängig von einer Reihe von Faktoren, wie den Abmessungen und der Struktur der Scheibe, dem Füllstoffanteil, dem Harzbindungsanteil sowie den Harzeigenschaften. Die Temperatur, bei der das Aushärten erfolgt, wir so gewählt, dass die in dem Grünling vorhanden Pflanzensamen nicht verbrennen.The green compact is then cured at elevated temperature. The curing process takes place in chamber or tunnel ovens. The temperature can be controlled automatically by the program controller. The selection of a suitable curing program depends on one A series of factors such as the dimensions and structure of the disk, the filler content, the resin bond rate and the resin properties. The temperature at which curing occurs, we selected so that the plant seeds present in the green plant do not burn.

Typischerweise werden die Presslinge zunächst bei Temperaturen zwischen 50°C und 100°C vorgetrocknet und anschließend bei Temperaturen von bis zu 250°C, vorzugsweise von bis zu 200°C, noch vorzugsweise von bis zu 180°C und insbesondere von bis zu 150°C ausgehärtet, wodurch sie ihre endgültige Form und Beschaffenheit erhalten. Der Aushärteprozess dauert zwischen 5 und 40 Stunden, vorzugsweise zwischen 10 und 30 Stunden und noch vorzugsweise 15 Stunden.Typically, the pellets are first pre-dried at temperatures between 50 ° C and 100 ° C and then at temperatures of up to 250 ° C, preferably up to 200 ° C, more preferably up to 180 ° C and in particular up to 150 ° C cured, whereby they get their final shape and texture. The curing process lasts between 5 and 40 hours, preferably between 10 and 30 hours and more preferably 15 hours.

Weg(e) zur Ausführung der ErfindungWay (s) for carrying out the invention

Im Folgenden wird beispielhaft die Herstellung einer Schleifscheibe mit Mohnsamen beschrieben:The production of a grinding wheel with poppy seeds is described below by way of example:

Zur Herstellung der Schleifscheibe wird Schleifkorn mit der Korngröße 36 (~500 µm) zunächst in einem Mischer vorgemischt. Dann erfolgt die Zugabe von Resol (flüssiges Phenolharz), wodurch das Schleifkorn gleichmäßig befeuchtet und mit einem dünnen Harzfilm überzogen wird. Wenn das Schleifkorn gleichmäßig mit Resol benetzt ist, wird eine Mischung aus pulverförmigem Phenolharz, Mohnsamen und Kryolith hinzugefügt.To produce the grinding wheel, abrasive grain with a grain size of 36 (~ 500 μm) is first premixed in a mixer. Resol (liquid phenolic resin) is then added, whereby the abrasive grain is evenly moistened and coated with a thin film of resin. When the abrasive grain is uniformly wetted with resole, a mixture of powdered phenolic resin, poppy seeds and cryolite is added.

Die Rezeptur setzt sich folgendermaßen zusammen:The recipe is composed as follows:

Tabelle 0001Table 0001 Schleifkorn (Korngröße 36)Abrasive grain (particle size 36) ca. 75 Gew.-%about 75% by weight Mohnsamenpoppy seed ca. 5 Gew.-%about 5% by weight Phenolharzphenolic resin ca. 13 Gew.-%about 13% by weight Kryolithcryolite ca. 7 Gew.-%about 7% by weight

Der Mischprozess wird solange fortgesetzt bis die gewünschte homogene Konsistenz erreicht ist. Die Schleifscheibenmischung soll dabei nicht zu trocken aber staubfrei und rieselfähig sein. Nach ihrer Fertigstellung wird die Mischung abgesiebt und einige Stunden abgelagert.The mixing process is continued until the desired homogeneous consistency is achieved. The grinding wheel mixture should not be too dry but dust-free and free-flowing. After its completion will be the mixture sieved and deposited for several hours.

Nach der Ablagerung wird die Pressmischung genau eingewogen und mit Hilfe von Schiebern in die Pressform befördert. Die Mischung wird unter äußerst gleichmäßiger Verteilung in die Pressform eingefüllt. Anschließend wird der Pressling in einer gebräuchlichen Presse, unter einem Pressdruck von 30 N/mm2 innerhalb weniger Sekunden kalt zu einem Grünling verpresst. Zur Steigerung der strukturellen Integrität der Schleifscheibe werden dabei drei Gewebe mitverpresst.After the deposition, the press mixture is accurately weighed and conveyed by means of sliders in the mold. The mixture is filled into the mold with extremely even distribution. Subsequently, the compact is pressed in a conventional press, under a pressure of 30 N / mm 2 within a few seconds cold to a green compact. In order to increase the structural integrity of the grinding wheel while three tissues are mitverpresst.

Nach dem Pressen wird der erzeugte Grünling zwischen Metallscheiben verspannt und über ein mehrstufiges Aushärteprofil bis zu einer Temperatur von 180°C über insgesamt 15 Stunden gebrannt. Im Anschluss an das Brennen wird die fertige Schleifscheibe zwischen den Metallplatten entnommen.After pressing, the green compact produced is clamped between metal discs and fired over a multi-stage curing profile up to a temperature of 180 ° C for a total of 15 hours. After firing, the finished grinding wheel is removed between the metal plates.

Die fertige Scheibe hat die Maße 125 x 7 x 22,23 mm und weist einen angenehm kühlen Schliff auf.The finished disc measures 125 x 7 x 22.23 mm and has a pleasantly cool finish.

Claims (14)

  1. Resin-bonded abrasive disk, containing a mixture of abrasive grain, binder and pore former, wherein the pore formers are plant seeds, characterized in that the finished abrasive disk contains the plant seeds.
  2. Abrasive disk according to claim 1 which consists 60 to 90 wt.-% of abrasive grain and 10 to 40 wt.-% of binder.
  3. Abrasive disk according to claim 2, wherein the plant seeds account for up to 80 wt.-% of the binder.
  4. Abrasive disk according to one of the previous claims, wherein the abrasive grain is corundum, silicon carbide, chromium oxide, cubic boron nitride, diamond, silicon oxide, zirconium oxide, garnet and emery, or mixtures thereof.
  5. Abrasive disk according to one of the previous claims, wherein the size of the abrasive grains is in the range of from 105 µm to 2830 µm, preferably in the range of from 250 µm to 2830 µm.
  6. Abrasive disk according to one of the previous claims, wherein the plant seeds contain oil.
  7. Abrasive disk according to one of the previous claims, wherein the plant seeds are rape, poppy, clover, lupine, mustard, serradella or vetch seeds or similar plant seeds.
  8. Abrasive disk according to one of the previous claims, wherein the binder is a liquid or powdery resin, for example polyimide, phenolic resin, epoxy resin, unsaturated polyester.
  9. Abrasive disk according to one of the previous claims, which contains a reinforcement, in particular a glass-fibre cloth reinforcement.
  10. Method of producing an abrasive disk according to one of claims 1 to 9 which comprises the following steps: mixing of abrasive grain, binder and plant seeds, pouring of the starting mixture into a mould provided for it, pressing of the mixture, pre-drying of the mixture and hardening of the abrasive disk, characterized in that the plant seeds are not burned when producing the abrasive disk.
  11. Method according to claim 10, wherein pressing of the mixture takes place under contact pressures of from 15 to 45 N/mm2, preferably from 20 to 35 N/mm2, even more preferably of from 30 N/mm2 to produce a green preform.
  12. Method according to claim 10 or 11, wherein the pressing time lies in the range of from 1 to 100 seconds, preferably 5 to 50 seconds.
  13. Method according to one of claims 10 to 12, wherein the abrasive disk is hardened at temperatures of up to 250°C, preferably of up to 200°C, even more preferably of up to 180°C and in particular of up to 150°C.
  14. Method according to one of claims 10 to 13, wherein the hardening of the abrasive disk lasts 5 to 40 hours, preferably 10 to 30 hours and even more preferably 15 hours.
EP10701675.0A 2009-01-29 2010-01-28 Grinding wheel comprising vegetable seeds as filling material and manufacturing method Not-in-force EP2391482B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10701675T PL2391482T3 (en) 2009-01-29 2010-01-28 Grinding wheel comprising vegetable seeds as filling material and manufacturing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009006699A DE102009006699A1 (en) 2009-01-29 2009-01-29 Abrasive with vegetable seed capsules as filler
PCT/EP2010/050996 WO2010086371A1 (en) 2009-01-29 2010-01-28 Grinding disk having plant seed capsules as a filler and method for the production thereof

Publications (2)

Publication Number Publication Date
EP2391482A1 EP2391482A1 (en) 2011-12-07
EP2391482B1 true EP2391482B1 (en) 2013-09-04

Family

ID=42123034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10701675.0A Not-in-force EP2391482B1 (en) 2009-01-29 2010-01-28 Grinding wheel comprising vegetable seeds as filling material and manufacturing method

Country Status (10)

Country Link
US (1) US20110281511A1 (en)
EP (1) EP2391482B1 (en)
JP (1) JP2012516241A (en)
CN (1) CN102300675A (en)
BR (1) BRPI1007425A2 (en)
DE (1) DE102009006699A1 (en)
ES (1) ES2437392T3 (en)
MX (1) MX2011007914A (en)
PL (1) PL2391482T3 (en)
WO (1) WO2010086371A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012004076A1 (en) 2012-03-02 2013-09-05 Peter Klenert Producing ceramic materials useful e.g. as refractory assemblies and dielectrics, comprises reacting ceramics and rocks with inorganic fillers using a binding agent, preferably a biogenic polymer produced e.g. from epoxidized triglycerides
JP6434266B2 (en) * 2013-12-17 2018-12-05 富士紡ホールディングス株式会社 Lapping resin surface plate and lapping method using the same
CN105505313A (en) * 2015-11-25 2016-04-20 江苏仓环铜业股份有限公司 An abrasive used for cutter polishing or passivating
RU2685825C1 (en) * 2018-07-10 2019-04-23 Открытое акционерное общество " Волжский абразивный завод" Mass for production of highly porous abrasive tool and method for production of highly porous abrasive tool
CN112384329B (en) * 2018-11-13 2024-01-23 株式会社亚都玛科技 Abrasive material for multicore ferrule
CN110303439B (en) * 2019-07-31 2020-10-27 中铁隆昌铁路器材有限公司 Forming process of passive grinding wheel special for high-speed grinding vehicle
DE102022126743A1 (en) 2022-10-13 2024-04-18 Ernst-Abbe-Hochschule Jena Körperschaft des öffentlichen Rechts Tool for material removal and method for its manufacture

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE13821C (en) * G. A. buchholz in Charlottenburg, Spandauerstrafse 25 Process for the production of porous grinding media made of porcelain together with the devices used for this purpose
US2319182A (en) * 1938-11-16 1943-05-11 Agicide Lab Inc Molded article
US2537541A (en) * 1945-07-19 1951-01-09 Norton Co Grinding wheel construction
US3925034A (en) * 1973-05-14 1975-12-09 Res Abrasive Products Inc Resin bonded grinding wheel containing gas-filled thermoplastic resin beads and method of making it
US4903440A (en) * 1988-11-23 1990-02-27 Minnesota Mining And Manufacturing Company Abrasive product having binder comprising an aminoplast resin
US5035723A (en) * 1989-04-28 1991-07-30 Norton Company Bonded abrasive products containing sintered sol gel alumina abrasive filaments
GB8927983D0 (en) * 1989-12-11 1990-02-14 Minnesota Mining & Mfg Abrasive elements
US5221294A (en) 1991-05-22 1993-06-22 Norton Company Process of producing self-bonded ceramic abrasive wheels
US5203886A (en) 1991-08-12 1993-04-20 Norton Company High porosity vitrified bonded grinding wheels
JP3314213B2 (en) * 1993-03-02 2002-08-12 富山県 Resinoid grinding wheel and method of manufacturing the same
JPH09207071A (en) * 1995-12-01 1997-08-12 Masayuki Oka Grease abrasive-contained sponge-like grinding wheel
US5919549A (en) * 1996-11-27 1999-07-06 Minnesota Mining And Manufacturing Company Abrasive articles and method for the manufacture of same
US6074278A (en) * 1998-01-30 2000-06-13 Norton Company High speed grinding wheel
JPH11347952A (en) * 1998-06-10 1999-12-21 Hitachi Chem Co Ltd Resin grinding wheel for grinding semi-conductor wafer, and its manufacture
JP3498952B2 (en) * 2001-04-16 2004-02-23 株式会社チップトン Manufacturing method of resinoid grinding wheel
US6609963B2 (en) * 2001-08-21 2003-08-26 Saint-Gobain Abrasives, Inc. Vitrified superabrasive tool and method of manufacture
JP2003191170A (en) * 2001-12-26 2003-07-08 Fuji Grinding Wheel Co Ltd Abrasive cutting wheel and its manufacturing method
US6500220B1 (en) * 2002-02-19 2002-12-31 Cimcool Industrial Products, Inc. Impregnated grinding wheel
CA2457249A1 (en) * 2003-12-09 2005-06-09 Suntek Industries Ltd. Preparation of coated abrasive disk
DE102004035088A1 (en) * 2004-07-20 2006-02-16 Chemetall Ges.Mbh Organically bound release or abrasive particles with a functional additive
JP2008142883A (en) * 2006-11-13 2008-06-26 Kurenooton Kk Resinoid bonded grinding wheel
JP5020333B2 (en) * 2006-12-20 2012-09-05 スリーエム イノベイティブ プロパティズ カンパニー Coated abrasive disc and method for making the same

Also Published As

Publication number Publication date
BRPI1007425A2 (en) 2016-02-16
US20110281511A1 (en) 2011-11-17
PL2391482T3 (en) 2014-02-28
JP2012516241A (en) 2012-07-19
EP2391482A1 (en) 2011-12-07
CN102300675A (en) 2011-12-28
WO2010086371A1 (en) 2010-08-05
DE102009006699A1 (en) 2010-08-05
MX2011007914A (en) 2011-08-17
ES2437392T3 (en) 2014-01-10

Similar Documents

Publication Publication Date Title
EP2391482B1 (en) Grinding wheel comprising vegetable seeds as filling material and manufacturing method
DE69730439T2 (en) GRINDING WHEEL WITH HIGH PERMEABILITY
DE69730438T2 (en) PROCESS FOR PRODUCING GRINDING WHEELS WITH HIGH PERMEABILITY
DE69937719T2 (en) Ceramic-bonded abrasive test specimen reinforced by resin impregnation and method for producing the same
AT500569B1 (en) GRINDING MATERIALS WITH NOVEL STRUCTURES AND METHOD OF GRINDING
AT500868B1 (en) SINTERED SUPERSCHLEIFWERKZEUG AND MANUFACTURING PROCESS
DE112005001119B4 (en) Truing blade for machining abrasive tools and method for making a truing blade
DE60112740T2 (en) POROUS GRINDING WITH CERAMIC GRINDING COMPOSITES, METHOD OF PREPARATION AND METHOD OF USE
DE60007873T2 (en) METHOD FOR PRODUCING MICRO GRINDING TOOLS
DE10392644T5 (en) Improved coated abrasives
AT500376A2 (en) POROUS OBJECTS WITH SLICING GLOMERATES AND METHOD FOR PRODUCING THE GRINDING GLOMERATES
DE2635104C3 (en) Process for the production of bonded abrasive articles
CH638473A5 (en) METHOD FOR PRODUCING DIAMOND GRINDING BODIES.
DE102010047095A1 (en) Polycrystalline Al 2 O 3 bodies based on molten aluminum oxide
EP0826758B1 (en) Composite cutting element containing diamond particles and method for its preparation
EP2251143B1 (en) Method of manufacturing a tool made from bound abrasive agents
DE2350139A1 (en) Grinding element contains abrasive particles and binding agent - forming walls of hollow objects stable relative to grinding forces
EP3277461B1 (en) Open pore ceramic bonded abrasive tool, method for forming the abrasive tool and pore forming composition used for forming the abrasive tool
EP3590658B1 (en) Method for producing thin grinding bodies
DE2500665A1 (en) CERAMIC GRINDING WHEELS AND PROCESS FOR THEIR PRODUCTION
DE812294C (en) Abrasive body with bond made of finely divided oxides
DE10221483C1 (en) Process for the production of free sintered annular grinding pads for grinding wheels
EP2653265B1 (en) Abrasive agent and grinding tool
CN114226714B (en) Powder metallurgy material, preparation method and application thereof
EP3360944A2 (en) Abrasive article

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110817

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130419

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 630217

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130915

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502010004595

Country of ref document: DE

Effective date: 20131031

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2437392

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20140110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131204

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131205

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140104

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20140122

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20140122

Year of fee payment: 5

Ref country code: IT

Payment date: 20140129

Year of fee payment: 5

Ref country code: FR

Payment date: 20140124

Year of fee payment: 5

Ref country code: PL

Payment date: 20140127

Year of fee payment: 5

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502010004595

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140106

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BERE Be: lapsed

Owner name: RHODIUS SCHLEIFWERKZEUGE G.M.B.H. & CO. KG

Effective date: 20140131

26N No opposition filed

Effective date: 20140605

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140128

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502010004595

Country of ref document: DE

Effective date: 20140605

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140128

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150129

Year of fee payment: 6

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20150801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150128

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20160226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 630217

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150128

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20100128

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502010004595

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130904