EP3569360A1 - Grinding wheel - Google Patents
Grinding wheel Download PDFInfo
- Publication number
- EP3569360A1 EP3569360A1 EP18172592.0A EP18172592A EP3569360A1 EP 3569360 A1 EP3569360 A1 EP 3569360A1 EP 18172592 A EP18172592 A EP 18172592A EP 3569360 A1 EP3569360 A1 EP 3569360A1
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- European Patent Office
- Prior art keywords
- grinding wheel
- surface segments
- recessed area
- harder
- grinding
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 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
- B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
- B24D5/063—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental with segments embedded in a matrix which is rubbed away during the grinding process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
Definitions
- the invention relates to a grinding wheel for material-removing machining at least one workpiece, preferably grinding wheel for simultaneous material-removing machining of at least two flat workpieces, wherein the grinding wheel is provided with a base body and an abrasive coating thereon for the abrasive machining of the at least one workpiece, and wherein the abrasive coating comprises a plurality of surface segments, wherein both in the circumferential direction and in the radial direction in each case a plurality of surface segments are provided.
- grinding wheels are known in which the hardness of the surface segments is tailored to the particular application.
- grinding wheels with harder surface segments for machining hard workpieces such.
- hardened steel and grinding wheels with less hard surface segments for the processing of less hard workpieces such.
- copper known.
- hardness is used as a term for the modulus of elasticity of the material, since the modulus of elasticity correlates with the "hardness” (in the vernacular sense) of an abrasive article as a measure of wear resistance.
- harder means a higher modulus of elasticity and “less hard” or “softer” denotes a lower modulus of elasticity.
- the modulus of elasticity should be in the range of 40GPa to 120GPa, preferably 70GPa to 105GPa, for the presently relevant application.
- the modulus of elasticity for determining these values is determined by the resonance method, also called acoustic hardness testing.
- the determination of the modulus of elasticity is carried out according to DIN EN 843-2 (2006).
- the natural frequency of a sample body is used in conjunction with sample dimensions and further material characteristic (density) to calculate the elastic modulus.
- the specimen is brought into direct contact with a piezo transducer and vibrated steadily over a fixed frequency spectrum (maximum between 100 Hz to 100 kHz) [DIN EN 843-2 (2006)]. If the excitation frequency corresponds to the fundamental frequency of the sample, resonance oscillation with maximum amplitude occurs. In this way, the natural frequency can be determined with the aid of a further piezoelectric sensor. This is used for a downstream elastic modulus calculation according to DIN EN 843-2 (2006).
- the measuring device used for this purpose may be, for example, a ZVUK 130 (supplier: ABRASIV, a.s., Pod Borkem 312, 293 01 Mlada Boleslav, Czech Republic).
- a disadvantage of the previously known grinding wheels that in practice there are situations in which in a short time sequence alternately for a hard workpieces, but on the other less hard workpieces must be edited. As a result, either different grinding wheels are used in each case and insofar as appropriate conversions of the grinding machine used must take place. In addition to the increased financial costs for the provision of the various grinding wheels, the setup times also lead to a reduced service life of the grinding machine, which also represents a financial impact.
- the object of the invention is to avoid the aforementioned disadvantages and to provide a grinding wheel with which both harder and softer workpieces can be processed with good machining results and good wear behavior of the grinding wheel.
- the abrasive coating comprises at least two different types of surface segments, which are formed differently hard.
- the different surface segments of the grinding wheel in a still unused grinding wheel the same height and remain at the same height by a uniform wear of the surface segments.
- no two different grinding wheels or sets of grinding wheels are required and corresponding time losses due to the conversion of the grinding machine are eliminated.
- the performance with regard to removal is virtually unchanged with only slightly increased wear of the grinding wheel.
- the roughness of the generated workpiece surface which is also adversely affected by scratches of material shards in the abrasive coating of the grinding wheel, is improved over a grinding wheel, which has only surface segments with the high hardness.
- At least a first group of harder surface segments and a second group of softer surface segments can be provided.
- the hardness of the respective surface segments is influenced by the bond (usually by means of a glass frit) and the type and proportion of the grain (for example diamond or CBN), furthermore by the proportion of the binder (eg glass frit) and the fraction of a secondary grain, such as B. alumina.
- the ratios of different hard surface segments to each other may be arbitrary, for example, a distribution harder surface segments / softer surface segments from 20% / 80% to 80% / 20% possible.
- the distribution may be 30% / 70% to 70% / 30%.
- the proportion of harder surface segments may always be higher than the proportion of softer surface segments or vice versa.
- the harder surface segments may have a hardness which is at least 5% harder than the hardness of the softer surface segments, preferably 10% to 20% harder than the hardness of the softer surface segments.
- At least a portion of the surface segments may be formed either circular or annular or hexagonal.
- the entirety of the surface segments may form an entire surface without a high proportion of free spaces between the surface segments.
- At least a part of the surface segments may be formed quadrangular with straight and / or curved side edges.
- At least two adjacent surface segments may be defined by a recessed area, e.g. B. in the form of a groove, be separated from each other.
- the recessed areas can also be used, for example, for receiving / removing coolant and / or lubricant.
- At least one recessed region in the radial direction can extend over the entire radial extent of the grinding wheel and / or at least a recessed area seen in the radial direction only over a portion of the radial extent of the grinding wheel rich.
- adjacent surface segments may be disposed immediately adjacent one another (i.e., "on edge").
- At least one recessed area may extend radially or in the form of an involute.
- At least one recessed area preferably each recessed area, with a filler such.
- a filler such as epoxy resin, at least partially, preferably completely, be filled.
- At least one recessed area preferably each recessed area, can have a width of at least 1 mm, preferably 3 mm to 5 mm.
- At least one harder surface segment and also at least one softer surface segment can be provided at each radial position of the grinding wheel in the circumferential direction. This ensures that the desired machining result can be achieved with each radial position of the grinding wheel.
- the portion occupied by the at least one harder surface segment and the portion occupied by the at least one softer surface segment can be approximately uniform at any radial position of the grinding wheel.
- the material thickness of the surface segments can be at least 3 mm, preferably 5 mm to 10 mm.
- the depth of the recessed areas may correspond to the material thickness of the surface segments or at least be slightly smaller.
- the invention further relates to a grinding wheel set with two grinding wheels for simultaneous material-removing machining of both sides of at least two flat workpieces.
- Another object of the invention is to the extent to avoid the disadvantages mentioned above and to provide a grinding wheel set, with both harder and softer workpieces can be edited with good machining results and good wear behavior of the grinding wheels of Schleifusionnsatzes.
- This object is achieved in a generic grinding wheel set in that at least one grinding wheel is a grinding wheel according to the invention, preferably both grinding wheels are each a grinding wheel according to the invention.
- the sole FIGURE shows a grinding wheel 1, which has a base body and an abrasive coating arranged thereon for the abrasive machining of at least one workpiece not shown in the drawing.
- the abrasive coating comprises a plurality of surface segments 2, 3, which are formed hexagonal in the embodiment shown, wherein in each case a plurality of surface segments are provided both in the circumferential direction and in the radial direction.
- Respective adjacent surface segments 2, 3 are separated from one another by a recessed region 4 in the form of a groove.
- the recessed region 4 extends in the radial direction over the entire radial extent of the grinding wheel 1.
- the grinding wheel 1 further comprises a main body 5, on which the surface segments 2, 3 are preferably attached by gluing.
- the surface elements 2, 3 of the abrasive coating are divided into two different types surface segments 2, 3, which are formed differently hard, and include a first group of harder surface segments 2 and a second group softer surface segments.
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Abstract
Die Erfindung betrifft eine Schleifscheibe zur Material-abtragenden Bearbeitung wenigstens eines Werkstücks, vorzugsweise Schleifscheibe zur gleichzeitigen Material-abtragenden Bearbeitung wenigstens zweier flacher Werkstücke, wobei die Schleifscheibe mit einem Grundkörper und einem darauf angeordneten Schleifbelag für die schleifende Bearbeitung des zumindest einen Werkstücks versehen ist, und wobei der Schleifbelag eine Vielzahl an Flächensegmenten umfasst, wobei sowohl in Umfangsrichtung als auch in radialer Richtung jeweils mehrere Flächensegmente vorgesehen sind.Um eine Schleifscheibe anzugeben, mit der sowohl härtere als auch weichere Werkstücke bei gutem Bearbeitungsergebnis und guten Verschleißverhalten der Schleifscheibe bearbeitet werden können, soll der Schleifbelag zumindest zwei verschiedene Typen Flächensegmente umfassen, die unterschiedlich hart ausgebildet sind.The invention relates to a grinding wheel for material-removing machining at least one workpiece, preferably grinding wheel for simultaneous material-removing machining at least two flat workpieces, wherein the grinding wheel is provided with a base body and an abrasive coating thereon for the abrasive machining of the at least one workpiece, and wherein the abrasive coating comprises a plurality of surface segments, wherein in each case a plurality of surface segments are provided both in the circumferential direction and in the radial direction. To provide a grinding wheel with which both harder and softer workpieces can be processed with good machining results and good wear behavior of the grinding wheel the abrasive coating at least two different types include surface segments that are designed differently hard.
Description
Die Erfindung betrifft eine Schleifscheibe zur Material-abtragenden Bearbeitung wenigstens eines Werkstücks, vorzugsweise Schleifscheibe zur gleichzeitigen Material-abtragenden Bearbeitung wenigstens zweier flacher Werkstücke, wobei die Schleifscheibe mit einem Grundkörper und einem darauf angeordneten Schleifbelag für die schleifende Bearbeitung des zumindest einen Werkstücks versehen ist, und wobei der Schleifbelag eine Vielzahl an Flächensegmenten umfasst, wobei sowohl in Umfangsrichtung als auch in radialer Richtung jeweils mehrere Flächensegmente vorgesehen sind.The invention relates to a grinding wheel for material-removing machining at least one workpiece, preferably grinding wheel for simultaneous material-removing machining of at least two flat workpieces, wherein the grinding wheel is provided with a base body and an abrasive coating thereon for the abrasive machining of the at least one workpiece, and wherein the abrasive coating comprises a plurality of surface segments, wherein both in the circumferential direction and in the radial direction in each case a plurality of surface segments are provided.
Aus der Praxis sind derartige Schleifscheiben bekannt, bei denen die Härte der Flächensegmente auf den jeweiligen Einsatzzweck abgestimmt ist. Insoweit sind Schleifscheiben mit härteren Flächensegmenten für die Bearbeitung harter Werkstücke, wie z. B. gehärteter Stahl, sowie Schleifscheiben mit weniger harten Flächensegmenten für die Bearbeitung weniger harter Werkstücke, wie z. B. Kupfer, bekannt.From practice, such grinding wheels are known in which the hardness of the surface segments is tailored to the particular application. In that regard, grinding wheels with harder surface segments for machining hard workpieces such. As hardened steel, and grinding wheels with less hard surface segments for the processing of less hard workpieces such. As copper, known.
In dieser Anmeldung wird "Härte" als Bezeichnung für den Elastizitätsmodul des Materials verwendet, da der Elastizitätsmodul mit der "Härte" (im sprachüblichen Sinn) eines Schleifkörpers als Maß für die Verschleißfestigkeit korreliert. Dabei wird unter der Angabe "härter" ein höherer Elastizitätsmodul-Wert verstanden und "weniger hart" bzw. "weicher" bezeichnet einen niedrigeren Elastizitätsmodul-Wert.In this application, "hardness" is used as a term for the modulus of elasticity of the material, since the modulus of elasticity correlates with the "hardness" (in the vernacular sense) of an abrasive article as a measure of wear resistance. In this case, the term "harder" means a higher modulus of elasticity and "less hard" or "softer" denotes a lower modulus of elasticity.
Der Elastizitätsmodul sollte für den vorliegend relevanten Einsatzzweck im Bereich von 40GPa bis 120GPa liegen, bevorzugt 70GPa bis 105GPa.The modulus of elasticity should be in the range of 40GPa to 120GPa, preferably 70GPa to 105GPa, for the presently relevant application.
Dabei wird der Elastizitätsmodul zur Bestimmung dieser Werte mit dem Resonanzverfahren, auch als akustische Härteprüfung genannt, bestimmt. Die Bestimmung des Elastitizitätsmoduls erfolgt gemäß DIN EN 843-2 (2006). Die Eigenfrequenz eines Probenkörpers wird dabei in Verbindung mit Probenabmaßen und weiterem Materialkennwert (Dichte) genutzt, um den Elastizitätsmodul zu berechnen. Hierfür wird der Probenkörper in direkten Kontakt mit einem Piezowandler gebracht und stetig über ein festgelegtes Frequenzspektrum (maximal zwischen 100 Hz bis 100 kHz) in Schwingung versetzt [DIN EN 843-2 (2006)]. Entspricht die Anregungsfrequenz der Grundfrequenz der Probe, kommt es zur Resonanzschwingung mit maximaler Amplitude. Auf diese Weise kann mit Hilfe eines weiteren piezoelektrischen Sensors die Eigenfrequenz ermittelt werden. Diese wird für eine nachgelagerte Elastizitätsmodul-Berechnung nach DIN EN 843-2 (2006) genutzt.The modulus of elasticity for determining these values is determined by the resonance method, also called acoustic hardness testing. The determination of the modulus of elasticity is carried out according to DIN EN 843-2 (2006). The natural frequency of a sample body is used in conjunction with sample dimensions and further material characteristic (density) to calculate the elastic modulus. For this purpose, the specimen is brought into direct contact with a piezo transducer and vibrated steadily over a fixed frequency spectrum (maximum between 100 Hz to 100 kHz) [DIN EN 843-2 (2006)]. If the excitation frequency corresponds to the fundamental frequency of the sample, resonance oscillation with maximum amplitude occurs. In this way, the natural frequency can be determined with the aid of a further piezoelectric sensor. This is used for a downstream elastic modulus calculation according to DIN EN 843-2 (2006).
Das hierzu verwendete Messgerät kann beispielsweise ein ZVUK 130 (Lieferant: ABRASIV, a.s., Pod Borkem 312, 293 01 Mlada Boleslav, Tschechische Republik) sein.The measuring device used for this purpose may be, for example, a ZVUK 130 (supplier: ABRASIV, a.s., Pod Borkem 312, 293 01 Mlada Boleslav, Czech Republic).
Nachteilig bei den vorbekannten Schleifscheiben ist, dass es in der Praxis zu Situationen kommt, bei denen in kurzer zeitlicher Abfolge abwechselnd zum einen harte Werkstücke, aber zum anderen auch weniger harte Werkstücke bearbeitet werden müssen. Dies führt dazu, dass entweder jeweils unterschiedliche Schleifscheiben zum Einsatz kommen und insoweit entsprechende Umrüstungen der verwendeten Schleifmaschine stattfinden müssen. Neben den erhöhten finanziellen Aufwendungen für die Vorhaltung der verschiedenen Schleifscheiben führen die Rüstzeiten auch zu einer reduzierten Nutzungsdauer der Schleifmaschine, was ebenfalls eine finanzielle Beeinträchtigung darstellt.A disadvantage of the previously known grinding wheels, that in practice there are situations in which in a short time sequence alternately for a hard workpieces, but on the other less hard workpieces must be edited. As a result, either different grinding wheels are used in each case and insofar as appropriate conversions of the grinding machine used must take place. In addition to the increased financial costs for the provision of the various grinding wheels, the setup times also lead to a reduced service life of the grinding machine, which also represents a financial impact.
Sofern stattdessen lediglich eine Schleifscheibe mit höherer Härte für die Bearbeitung von harten und weniger harten Werkstücken verwendet wird, so muss diese ausreichend hart für die Bearbeitung der harten Werkstücke sein. In der Praxis treten bei der Bearbeitung von weniger harten Werkstücken mit einer solchen Schleifscheibe jedoch verstärkt Materialeinschlüsse auf den Flächensegmenten der Schleifscheibe auf, welche zu einer nachteiligen Beeinflussung des Schleifbildes führen. Bei den Materialeinschlüssen handelt es sich um Werkstückabrieb, beispielsweise metallische Partikel, welche auf den Flächensegmenten haften. Eine harte Schleifscheibe neigt zu Plateaubildung beim Verschleiß der Flächensegmente, diese führt zu bereichsweiser erhöhter Reibungswärme wodurch Partikel an den Flächensegmenten anhaften können.If instead, only a grinding wheel with higher hardness for the machining of hard and less hard workpieces is used, so This must be sufficiently hard for the machining of hard workpieces. In practice, when machining less hard workpieces with such a grinding wheel, however, material inclusions increasingly occur on the surface segments of the grinding wheel, which lead to an adverse effect on the grinding pattern. The material inclusions are workpiece abrasions, for example metallic particles, which adhere to the surface segments. A hard grinding wheel tends to form plateau during wear of the surface segments, which leads to increased frictional heat in certain regions, as a result of which particles can adhere to the surface segments.
Aufgabe der Erfindung ist es, die vorgenannten Nachteile zu vermeiden und eine Schleifscheibe anzugeben, mit der sowohl härtere als auch weichere Werkstücke bei gutem Bearbeitungsergebnis und gutem Verschleißverhalten der Schleifscheibe bearbeitet werden können.The object of the invention is to avoid the aforementioned disadvantages and to provide a grinding wheel with which both harder and softer workpieces can be processed with good machining results and good wear behavior of the grinding wheel.
Diese Aufgabe wird bei einer gattungsgemäßen Schleifscheibe dadurch gelöst, dass der Schleifbelag zumindest zwei verschiedene Typen Flächensegmente umfasst, die unterschiedlich hart ausgebildet sind. Hierbei sind die unterschiedlichen Flächensegmente der Schleifscheibe bei einer noch unbenutzten Schleifscheibe gleich hoch und verbleiben auf gleicher Höhe durch einen gleichmäßigen Verschleiß der Flächensegmente. Somit sind keine zwei verschiedenen Schleifscheiben bzw. Schleifscheibensätze (bei gleichzeitiger doppelseitiger Bearbeitung der Werkstücke) erforderlich und entsprechende Zeitverluste durch die Umrüstung der Schleifmaschine entfallen. Gleichzeitig ist die Performance bzgl. Abtrag nahezu unverändert bei nur geringfügig erhöhtem Verschleiß der Schleifscheibe. Die Rauheit der erzeugten Werkstückoberfläche, welche auch durch Kratzer von Materialeinschüssen im Schleifbelag der Schleifscheibe negativ beeinflusst wird, ist verbessert gegenüber einer Schleifscheibe, die ausschließlich Flächensegmente mit der großen Härte aufweist.This object is achieved in a generic grinding wheel characterized in that the abrasive coating comprises at least two different types of surface segments, which are formed differently hard. Here are the different surface segments of the grinding wheel in a still unused grinding wheel the same height and remain at the same height by a uniform wear of the surface segments. Thus, no two different grinding wheels or sets of grinding wheels (with simultaneous double-sided machining of the workpieces) are required and corresponding time losses due to the conversion of the grinding machine are eliminated. At the same time, the performance with regard to removal is virtually unchanged with only slightly increased wear of the grinding wheel. The roughness of the generated workpiece surface, which is also adversely affected by scratches of material shards in the abrasive coating of the grinding wheel, is improved over a grinding wheel, which has only surface segments with the high hardness.
Vorzugsweise kann zumindest eine erste Gruppe härterer Flächensegmente und eine zweite Gruppe weicherer Flächensegmente vorgesehen sein. Die Härte der jeweiligen Flächensegmente wird durch die Bindung (in der Regel mittels Glasfritte) und die Art und Anteil der Körnung (beispielsweise Diamant oder CBN) beeinflusst, weiterhin auch durch den Anteil des Bindemittels (z. B. Glasfritte) und den Anteil eines Sekundärkorns, wie z. B. Aluminiumoxid.Preferably, at least a first group of harder surface segments and a second group of softer surface segments can be provided. The The hardness of the respective surface segments is influenced by the bond (usually by means of a glass frit) and the type and proportion of the grain (for example diamond or CBN), furthermore by the proportion of the binder (eg glass frit) and the fraction of a secondary grain, such as B. alumina.
Hierbei können die Verhältnisse der verschieden harten Flächensegmente zueinander beliebig sein, beispielsweise ist eine Verteilung härtere Flächensegmente/weichere Flächensegmente von 20%/80% bis hin zu 80%/20% möglich. Bevorzugt kann die Verteilung 30%/70% bis zu 70%/30% betragen. Bei mehr als 2 verschiedenen harten Typen an Flächensegmenten sind auch andere Aufteilungen möglich. Vorteilhafterweise kann der Anteil an härteren Flächensegmenten immer höher sein als der Anteil an weicheren Flächensegmenten oder umgekehrt.Here, the ratios of different hard surface segments to each other may be arbitrary, for example, a distribution harder surface segments / softer surface segments from 20% / 80% to 80% / 20% possible. Preferably, the distribution may be 30% / 70% to 70% / 30%. With more than 2 different hard types of surface segments, other splits are possible. Advantageously, the proportion of harder surface segments may always be higher than the proportion of softer surface segments or vice versa.
Erfindungsgemäß können die härteren Flächensegmente eine Härte aufweisen, welche zumindest 5% härter ist als die Härte der weicheren Flächensegmente, vorzugsweise 10% bis 20% härter ist als die Härte der weicheren Flächensegmente.According to the invention, the harder surface segments may have a hardness which is at least 5% harder than the hardness of the softer surface segments, preferably 10% to 20% harder than the hardness of the softer surface segments.
Vorteilhafterweise kann zumindest ein Teil der Flächensegmente entweder kreisförmig bzw. kreisringförmig oder aber hexagonal ausgebildet sein. Somit kann die Gesamtheit der Flächensegmente eine Gesamtfläche ohne einen hohen Anteil an freien Zwischenräumen zwischen den Flächensegmenten bilden.Advantageously, at least a portion of the surface segments may be formed either circular or annular or hexagonal. Thus, the entirety of the surface segments may form an entire surface without a high proportion of free spaces between the surface segments.
Auch kann insoweit zumindest ein Teil der Flächensegmente viereckig mit geraden und/oder gekrümmten Seitenkanten ausgebildet sein.Also, at least a part of the surface segments may be formed quadrangular with straight and / or curved side edges.
Vorzugsweise können zumindest zwei benachbarte Flächensegmente durch einen vertieften Bereich, z. B. in Form einer Nut, voneinander getrennt sein. Die vertieften Bereiche können beispielsweise auch der Aufnahme/Abfuhr von Kühl- und/oder Schmiermittel dienen.Preferably, at least two adjacent surface segments may be defined by a recessed area, e.g. B. in the form of a groove, be separated from each other. The recessed areas can also be used, for example, for receiving / removing coolant and / or lubricant.
Dabei kann zumindest ein vertiefter Bereich in radialer Richtung gesehen über die gesamte radiale Erstreckung der Schleifscheibe reichen und/oder zumindest ein vertiefter Bereich in radialer Richtung gesehen nur über einen Teilbereich der radialen Erstreckung der Schleifscheibe reichen.In this case, at least one recessed region in the radial direction can extend over the entire radial extent of the grinding wheel and / or at least a recessed area seen in the radial direction only over a portion of the radial extent of the grinding wheel rich.
Alternativ können benachbarte Flächensegmente unmittelbar aneinander angrenzend (d. h. "auf Stoß") angeordnet sein.Alternatively, adjacent surface segments may be disposed immediately adjacent one another (i.e., "on edge").
Weiterhin kann zumindest ein vertiefter Bereich radial oder in Form einer Evolvente verlaufen.Furthermore, at least one recessed area may extend radially or in the form of an involute.
Bei einem bevorzugten Ausführungsbeispiel der Erfindung kann zumindest ein vertiefter Bereich, vorzugsweise jeder vertiefte Bereich, mit einem Füllmaterial wie z. B. Epoxyharz, zumindest partiell, vorzugsweise vollständig, aufgefüllt sein.In a preferred embodiment of the invention, at least one recessed area, preferably each recessed area, with a filler such. As epoxy resin, at least partially, preferably completely, be filled.
Erfindungsgemäß kann zumindest ein vertiefter Bereich, vorzugsweise jeder vertiefte Bereich, eine Breite von wenigstens 1mm, vorzugsweise 3mm bis 5mm, haben.According to the invention, at least one recessed area, preferably each recessed area, can have a width of at least 1 mm, preferably 3 mm to 5 mm.
Vorzugsweise kann an jeder radialen Position der Schleifscheibe in Umfangsrichtung gesehen wenigstens ein härteres Flächensegment und auch zumindest ein weicheres Flächensegment vorgesehen sein. Somit ist sichergestellt, dass mit jeder radialen Position der Schleifscheibe das gewünschte Bearbeitungsergebnis erzielbar ist. Vorteilhafterweise kann an jeder radialen Position der Schleifscheibe in Umfangsrichtung gesehen der durch das zumindest eine härtere Flächensegment belegte Anteil und der durch das zumindest eine weichere Flächensegment belegte Anteil in etwa einheitlich groß sein.Preferably, at least one harder surface segment and also at least one softer surface segment can be provided at each radial position of the grinding wheel in the circumferential direction. This ensures that the desired machining result can be achieved with each radial position of the grinding wheel. Advantageously, as seen in the circumferential direction, the portion occupied by the at least one harder surface segment and the portion occupied by the at least one softer surface segment can be approximately uniform at any radial position of the grinding wheel.
Vorteilhafterweise kann die Materialstärke der Flächensegmente wenigstens 3mm, vorzugsweise 5mm bis 10mm betragen. Die Tiefe der vertieften Bereiche kann dabei der Materialstärke der Flächensegmente entsprechen oder aber zumindest geringfügig kleiner sein.Advantageously, the material thickness of the surface segments can be at least 3 mm, preferably 5 mm to 10 mm. The depth of the recessed areas may correspond to the material thickness of the surface segments or at least be slightly smaller.
Die Erfindung betrifft weiterhin einen Schleifscheibensatz mit zwei Schleifscheiben zur gleichzeitigen Material-abtragenden Bearbeitung beider Seiten wenigstens zweier flacher Werkstücke.The invention further relates to a grinding wheel set with two grinding wheels for simultaneous material-removing machining of both sides of at least two flat workpieces.
Weitere Aufgabe der Erfindung ist es insoweit, die eingangs genannten Nachteile zu vermeiden und einen Schleifscheibensatz anzugeben, mit dem sowohl härtere als auch weichere Werkstücke bei gutem Bearbeitungsergebnis und guten Verschleißverhalten der Schleifscheiben des Schleifscheibensatzes bearbeitet werden können.Another object of the invention is to the extent to avoid the disadvantages mentioned above and to provide a grinding wheel set, with both harder and softer workpieces can be edited with good machining results and good wear behavior of the grinding wheels of Schleifscheibensatzes.
Diese Aufgabe wird bei einem gattungsgemäßen Schleifscheibensatz dadurch gelöst, dass zumindest eine Schleifscheibe eine erfindungsgemäße Schleifscheibe ist, vorzugsweise beide Schleifscheiben jeweils eine erfindungsgemäße Schleifscheibe sind.This object is achieved in a generic grinding wheel set in that at least one grinding wheel is a grinding wheel according to the invention, preferably both grinding wheels are each a grinding wheel according to the invention.
Im Folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert. Die einzige Figur zeigt eine Schleifscheibe 1, die einen Grundkörper und einen darauf angeordneten Schleifbelag für die schleifende Bearbeitung zumindest eines in der Zeichnung nicht dargestellten Werkstücks aufweist.In the following, an illustrated in the drawing embodiment of the invention will be explained. The sole FIGURE shows a
Der Schleifbelag umfasst eine Vielzahl an Flächensegmenten 2, 3, die im gezeigten Ausführungsbeispiel hexagonal ausgebildet sind, wobei sowohl in Umfangsrichtung als auch in radialer Richtung jeweils mehrere Flächensegmente vorgesehen sind.The abrasive coating comprises a plurality of
Jeweils benachbarte Flächensegmente 2, 3 sind durch einen vertieften Bereich 4 in Form einer Nut voneinander getrennt. Dabei reicht der vertiefte Bereich 4 in radialer Richtung gesehen über die gesamte radiale Erstreckung der Schleifscheibe 1.Respective
Die Schleifscheibe 1 umfasst weiterhin einen Grundkörper 5, auf dem die Flächensegmente 2, 3 vorzugweise durch Aufkleben angebracht sind.The
Die Flächenelemente 2, 3 des Schleifbelags sind dabei in zwei verschiedene Typen Flächensegmente 2, 3, die unterschiedlich hart ausgebildet sind, aufgeteilt und umfassen eine erste Gruppe härterer Flächensegmente 2 und eine zweite Gruppe weicherer Flächensegmente 3.The
Claims (13)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18172592.0A EP3569360A1 (en) | 2018-05-16 | 2018-05-16 | Grinding wheel |
EP19734883.2A EP3793774A1 (en) | 2018-05-16 | 2019-05-15 | Grinding wheel |
US17/052,876 US20210069867A1 (en) | 2018-05-16 | 2019-05-15 | Grinding wheel |
CN201980032630.8A CN112135711A (en) | 2018-05-16 | 2019-05-15 | Grinding wheel |
PCT/IB2019/054039 WO2019220373A1 (en) | 2018-05-16 | 2019-05-15 | Grinding wheel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18172592.0A EP3569360A1 (en) | 2018-05-16 | 2018-05-16 | Grinding wheel |
Publications (1)
Publication Number | Publication Date |
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EP3569360A1 true EP3569360A1 (en) | 2019-11-20 |
Family
ID=62186329
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18172592.0A Withdrawn EP3569360A1 (en) | 2018-05-16 | 2018-05-16 | Grinding wheel |
EP19734883.2A Withdrawn EP3793774A1 (en) | 2018-05-16 | 2019-05-15 | Grinding wheel |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19734883.2A Withdrawn EP3793774A1 (en) | 2018-05-16 | 2019-05-15 | Grinding wheel |
Country Status (4)
Country | Link |
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US (1) | US20210069867A1 (en) |
EP (2) | EP3569360A1 (en) |
CN (1) | CN112135711A (en) |
WO (1) | WO2019220373A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111660212A (en) * | 2020-07-02 | 2020-09-15 | 江苏超峰工具有限公司 | Hot-pressed sintered grinding wheel and process thereof |
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DE2331646A1 (en) * | 1972-08-08 | 1974-02-28 | Evertz Egon | SANDING BODY |
JPH08132349A (en) * | 1994-11-02 | 1996-05-28 | Noritake Dia Kk | Grinding tool |
CN202357057U (en) * | 2011-10-20 | 2012-08-01 | 北京荣锋精密工具有限公司 | Glass ceramics bonding agent diamond double-end surface grinding wheel for grinding ceramic valve core |
WO2017217108A1 (en) * | 2016-06-13 | 2017-12-21 | バンドー化学株式会社 | Abrasive |
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US5934983A (en) * | 1996-04-08 | 1999-08-10 | Kabushiki Kaisha Kobe Seiko Sho | Double-side grinding method and double-side grinder |
EP1066134B9 (en) * | 1998-03-27 | 2002-11-13 | Norton Company | Abrasive tools |
JP2003117833A (en) * | 2001-10-15 | 2003-04-23 | Shin Etsu Chem Co Ltd | Polishing plate |
US20060172665A1 (en) * | 2003-03-14 | 2006-08-03 | Katsuya Okumura | Polishing tool and polishing apparatus |
KR101170129B1 (en) * | 2009-03-31 | 2012-07-31 | 엠.씨.케이 (주) | Manufacturing method of polishing pad having multi property |
CN202964426U (en) * | 2012-12-05 | 2013-06-05 | 修明 | Grinding wheel |
MY176178A (en) * | 2013-06-29 | 2020-07-24 | Hoya Corp | Method for manufacturing a glass substrate, method for manufacturing a magnetic disk, and polishing liquid composition for a glass substrate |
-
2018
- 2018-05-16 EP EP18172592.0A patent/EP3569360A1/en not_active Withdrawn
-
2019
- 2019-05-15 CN CN201980032630.8A patent/CN112135711A/en active Pending
- 2019-05-15 EP EP19734883.2A patent/EP3793774A1/en not_active Withdrawn
- 2019-05-15 US US17/052,876 patent/US20210069867A1/en not_active Abandoned
- 2019-05-15 WO PCT/IB2019/054039 patent/WO2019220373A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2331646A1 (en) * | 1972-08-08 | 1974-02-28 | Evertz Egon | SANDING BODY |
JPH08132349A (en) * | 1994-11-02 | 1996-05-28 | Noritake Dia Kk | Grinding tool |
CN202357057U (en) * | 2011-10-20 | 2012-08-01 | 北京荣锋精密工具有限公司 | Glass ceramics bonding agent diamond double-end surface grinding wheel for grinding ceramic valve core |
WO2017217108A1 (en) * | 2016-06-13 | 2017-12-21 | バンドー化学株式会社 | Abrasive |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111660212A (en) * | 2020-07-02 | 2020-09-15 | 江苏超峰工具有限公司 | Hot-pressed sintered grinding wheel and process thereof |
Also Published As
Publication number | Publication date |
---|---|
CN112135711A (en) | 2020-12-25 |
WO2019220373A1 (en) | 2019-11-21 |
US20210069867A1 (en) | 2021-03-11 |
EP3793774A1 (en) | 2021-03-24 |
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