EP3081337B1 - Roughing disc with core - Google Patents
Roughing disc with core Download PDFInfo
- Publication number
- EP3081337B1 EP3081337B1 EP16158947.8A EP16158947A EP3081337B1 EP 3081337 B1 EP3081337 B1 EP 3081337B1 EP 16158947 A EP16158947 A EP 16158947A EP 3081337 B1 EP3081337 B1 EP 3081337B1
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- EP
- European Patent Office
- Prior art keywords
- grinding wheel
- rough grinding
- core
- layer
- wheel according
- Prior art date
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Links
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229910021532 Calcite Inorganic materials 0.000 claims description 7
- 239000010456 wollastonite Substances 0.000 claims description 7
- 229910052882 wollastonite Inorganic materials 0.000 claims description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 229920001568 phenolic resin Polymers 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- 229910001610 cryolite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052683 pyrite Inorganic materials 0.000 claims description 3
- 239000011028 pyrite Substances 0.000 claims description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims 2
- 239000010410 layer Substances 0.000 description 64
- 230000006641 stabilisation Effects 0.000 description 9
- 238000011105 stabilization Methods 0.000 description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- HVXCTUSYKCFNMG-UHFFFAOYSA-N aluminum oxygen(2-) zirconium(4+) Chemical compound [O-2].[Zr+4].[Al+3] HVXCTUSYKCFNMG-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010431 corundum Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
-
- 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
- B24D7/02—Wheels in one piece
- B24D7/04—Wheels in one piece with reinforcing means
-
- 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
-
- 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
-
- 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
- B24D7/18—Wheels of special form
Definitions
- the invention relates to a grinding disc with the features of the preamble of patent claim 1, such as from U.S. 2015/000206 A1 famous.
- Such a grinding wheel is known from practice and is suitable for rough grinding material surfaces of various materials. It comprises a disc-shaped base body which comprises a central recess for the direct or indirect connection of a drive shaft of a tool. A rotary axis passes through the central recess.
- the base body includes at least one grinding layer.
- the U.S. 2015/000206 A1 discloses an abrasive disc having an abrasive layer and a backing layer.
- the grinding layer consists of several layers, between which a separating layer is arranged.
- the previously known grinding wheel does not have satisfactory stability, particularly at high speeds. Stability of a grinding wheel means that it remains stiff even under high contact pressure. A stable grinding disc is easy to control so that a defined or even high removal rate can be achieved.
- the invention is based on the object of creating a grinding wheel of the type mentioned in the introduction, which is characterized by an improved structure and, in particular, has improved stability.
- the grinding disc according to the invention comprises a disc-shaped base body, which comprises a central recess, through which a rotary axis passes, for the direct or indirect connection of a drive shaft of a tool, and at least one grinding layer.
- the grinding wheel according to the invention has a stabilization core for stabilizing the grinding wheel, which is assigned to the at least one grinding layer and is peripherally adjacent to the central recess.
- the stabilization core has a higher strength than the at least one grinding layer.
- the base body has a reinforcing layer and at least two grinding layers, with a separating layer being arranged between two adjacent grinding layers.
- a core segment is assigned to each of the grinding layers.
- the core segments define the stabilization core and are connected to each other indirectly via the corresponding separation layer.
- the use of a core within the grinding disc allows further adaptation and improved stability.
- the core serves to stabilize the grinding wheel during its rotation.
- the stabilizing core can optimize the grinding wheel in terms of its stability without affecting the grinding-active areas, the grinding mixtures or the strength of the grinding wheel. This is because the stabilizing core absorbs the forces acting on the at least one grinding layer during grinding and transmits them evenly to the drive shaft of the tool. At the same time, the stabilization core transmits the forces emanating from a user via the drive shaft of the tool evenly to the at least one grinding layer.
- the stabilization core thus also serves as a power transmission element between the at least one grinding layer and the connection to a drive shaft of a tool.
- the advantages of the grinding disc according to the invention lie both in the concentration of mass in the area of its center of rotation and in the indirect power transmission between the at least one abrasive layer and the drive shaft of the tool. As a result, the grinding wheel always remains stable and easy to control, even with large forces or contact pressures and/or high speeds.
- the ratio of the outer radius of the stabilizing core to an outer radius of the grinding disc is between 2:50 and 25:50.
- the ratio is preferably 17:50. This ratio leads to optimum stability with the largest possible grinding surface at the same time.
- the base body has at least two grinding layers, with a separating layer being arranged between two adjacent grinding layers, the interaction with the stabilizing core results in advantages over known grinding wheels in the event that both the stability and the strength of the grinding wheel are to be optimized.
- a known grinding wheel an attempt is made to compensate for an adaptation and improvement in stability and strength by means of separating layers arranged between individual grinding layers.
- separating layers arranged between individual grinding layers.
- there is a target variable conflict between stability and strength since these two target variables influence each other.
- the use of a core in combination with separating layers allows further adjustment and improvement of stability and strength to be achieved separately from one another.
- the core serves to stabilize the grinding wheel during its rotation.
- the separating layer serves to strengthen the grinding wheel.
- the grinding layers can contain grinding active grains such as regular brown fused aluminum and derivatives, blue aluminum oxide (blue fired alumina), white fused aluminum oxide, zirconium aluminum oxide (zirconia alumina), silicon carbide, ceramic grain, pink aluminum oxide (pink fused alumina) and/or monocrystalline aluminum oxide (monocrystalline alumina).
- the grinding layers can contain supporting fillers such as polyaluminum fluoride, cryolite, pyrite, Calcite, wollastonite and/or graphite which may be bonded with phenolic resin systems.
- the at least one separating layer extends from the recess or a hub to the outer edge of the grinding wheel.
- the individual core segments are connected to one another indirectly via the corresponding separating layer.
- An abrasive layer and a core segment assigned to the corresponding abrasive layer are arranged in each case between adjacent separating layers. The stability of the grinding disc is ensured by the fact that the individual core segments together serve to strengthen the grinding disc and define the stabilizing core.
- the only figure shows a section through a grinding wheel according to the invention.
- the grinding wheel 1 shown in the drawing has a base body 3 with a layered structure.
- the base body 3 comprises a central recess 2 through which an axis of rotation 5 which lies in the center of rotation of the grinding wheel 1 extends.
- An insert 4 for fastening the grinding wheel 1 to a drive shaft of a tool is arranged in the recess 2 .
- a reinforcement layer 6 is arranged on the tool side of the grinding wheel facing the tool.
- the reinforcement layer 6 can comprise rutile, wollastonite, calcite and/or basalt, which can be bonded with phenolic resin.
- a grain size can be between 0.1 mm and 1.0 mm, preferably between 0.2 mm and 0.5 mm.
- the reinforcing layer 6 can include quartz sand.
- the reinforcement layer 6 high strength. It can include a net-like insert in order to further increase the stability of the grinding wheel 1 .
- the grinding wheel 1 also has two grinding layers 8a, 8b, which are arranged on the side of the reinforcing layer 6 facing away from the tool side.
- the grinding layers 8a, 8b can have abrasive grains, such as regular brown fused aluminum and derivatives, blue aluminum oxide (blue fired alumina), white aluminum oxide (white fused alumina), zirconium aluminum oxide (zirconia alumina), silicon carbide, ceramic grain (ceramic grain) , Corundum pink (pink fused alumina) and / or monocrystalline aluminum oxide (monocrystalline alumina) include.
- the abrasive layers may include supporting fillers such as polyaluminum fluoride, cryolite, pyrite, calcite, wollastonite, and/or graphite, which may be bonded with phenolic resin systems.
- a phenolic resin abrasive grain mixture is thus formed, to which various fillers and additives can be added.
- a separating layer 10 is arranged between the two grinding layers 8a, 8b.
- a further separating layer 10 is arranged between the reinforcing layer 6 and the abrasive layer 8a.
- the separating layers 10 are each formed from a glass fabric layer and serve to strengthen the grinding wheel 1.
- the separating layers 10 extend from an outer edge of the grinding wheel 1 to the central recess 2 or surround the central recess 2 in a ring shape.
- the grinding wheel 1 comprises a stabilizing core 12 , which adjoins the central recess 2 around the axis of rotation 5 of the grinding wheel 1 , or forms the edge of the central recess 2 in sections.
- Stabilizing core 12 may include rutile, wollastonite, calcite, and/or basalt, which may be phenolic resin bonded.
- a grain size can be between 0.1 mm and 1.0 mm, preferably between 0.2 mm and 0.5 mm.
- the reinforcing layer 6 can include quartz sand.
- the stabilizing core 12 has a higher strength than the grinding layers 8a, 8b.
- the stabilizing core 12 is formed from two core segments 12a, 12b and serves as a power transmission element between the two grinding layers 8a, 8b and the connection to the drive shaft of the tool.
- a core segment 12a, 12b of the stabilization core 12 is assigned to each abrasive layer 8a, 8b.
- the core segment 12a is between two adjacent separator layers 10 arranged.
- the core segment 12b borders on a separating layer 10 on the tool side and is open on the workpiece side, ie uncovered by a separating layer 10 . It follows from this that the separating layers 10 divide the stabilization core 12 into two core segments 12a, 12b.
- the two adjacent core segments 12a, 12b are connected to one another via the separating layer 10 arranged in between and define the stabilization core 12.
- the outer radius a of the stabilizing core 12 has a ratio of 17:50 to the outer radius b of the grinding wheel.
- the stabilizing core 12 has a constant radius over its thickness or in the axial direction of the grinding wheel.
- the central recess 2 is designed as a countersunk hub.
Description
Die Erfindung betrifft eine Schruppscheibe mit den Merkmalen des Oberbegriffs des Patentanspruchs 1, wie z.B. aus der
Eine derartige Schruppscheibe ist aus der Praxis bekannt und eignet sich für das Schruppschleifen von Materialoberflächen diverser Materialien. Sie umfasst einen scheibenförmigen Grundkörper, der eine zentrale Ausnehmung zur direkten oder indirekten Anbindung einer Antriebswelle eines Werkzeugs umfasst. Die zentrale Ausnehmung ist von einer Drehachse durchgriffen. Zudem umfasst der Grundkörper mindestens eine Schleifschicht.Such a grinding wheel is known from practice and is suitable for rough grinding material surfaces of various materials. It comprises a disc-shaped base body which comprises a central recess for the direct or indirect connection of a drive shaft of a tool. A rotary axis passes through the central recess. In addition, the base body includes at least one grinding layer.
Die
Aus der
Die bisher bekannte Schruppscheibe weist insbesondere bei hohen Drehzahlen keine zufriedenstellende Stabilität auf. Stabilität einer Schruppscheibe bedeutet, dass sie auch bei einem hohen Anpressdruck steif bleibt. Eine stabile Schruppscheibe ist gut zu kontrollieren, so dass eine definierte oder auch hohe Abtragsleistung erreicht werden kann.The previously known grinding wheel does not have satisfactory stability, particularly at high speeds. Stability of a grinding wheel means that it remains stiff even under high contact pressure. A stable grinding disc is easy to control so that a defined or even high removal rate can be achieved.
Der Erfindung liegt die Aufgabe zugrunde, eine Schruppscheibe der einleitend genannten Gattung zu schaffen, welche sich durch einen verbesserten Aufbau auszeichnet und insbesondere eine verbesserte Stabilität aufweist.The invention is based on the object of creating a grinding wheel of the type mentioned in the introduction, which is characterized by an improved structure and, in particular, has improved stability.
Diese Aufgabe ist erfindungsgemäß durch die Schruppscheibe mit den Merkmalen des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by the grinding wheel with the features of
Die Schruppscheibe nach der Erfindung umfasst einen scheibenförmigen Grundkörper, der eine von einer Drehachse durchgriffene zentrale Ausnehmung zur direkten oder indirekten Anbindung einer Antriebswelle eines Werkzeugs und mindestens eine Schleifschicht umfasst. Die erfindungsgemäße Schruppscheibe hat einen Stabilisierungskern zur Stabilisierung der Schruppscheibe, welcher der mindestens einen Schleifschicht zugeordnet ist und umlaufend an die zentrale Ausnehmung angrenzt. Der Stabilisierungskern weist zudem eine höhere Festigkeit als die mindestens eine Schleifschicht auf. Der Grundkörper weist eine Verstärkungsschicht und mindestens zwei Schleifschichten auf, wobei jeweils eine Trennschicht zwischen zwei benachbarten Schleifschichten angeordnet ist. Jeder der Schleifschichten ist ein Kernsegment zugeordnet. Die Kernsegmente definieren den Stabilisierungskern und sind indirekt über die entsprechende Trennschicht miteinander verbunden.The grinding disc according to the invention comprises a disc-shaped base body, which comprises a central recess, through which a rotary axis passes, for the direct or indirect connection of a drive shaft of a tool, and at least one grinding layer. The grinding wheel according to the invention has a stabilization core for stabilizing the grinding wheel, which is assigned to the at least one grinding layer and is peripherally adjacent to the central recess. In addition, the stabilization core has a higher strength than the at least one grinding layer. The base body has a reinforcing layer and at least two grinding layers, with a separating layer being arranged between two adjacent grinding layers. A core segment is assigned to each of the grinding layers. The core segments define the stabilization core and are connected to each other indirectly via the corresponding separation layer.
Im Vergleich zu der bekannten Schruppscheibe lässt sich durch den Einsatz eines Kerns innerhalb der Schruppscheibe eine weitere Anpassung und Verbesserung der Stabilität erreichen. Der Kern dient nämlich der Stabilisierung der Schruppscheibe während ihrer Rotation.Compared to the well-known grinding disc, the use of a core within the grinding disc allows further adaptation and improved stability. The core serves to stabilize the grinding wheel during its rotation.
Speziell im Bereich der zentralen Ausnehmung, wo sich durch den Schleifprozess entstehende Belastungen, wie beispielsweise Rotationskräfte und Seitenlasten konzentrieren, kann der Stabilisierungskern die Schruppscheibe hinsichtlich ihrer Stabilität optimieren, ohne dabei die schleifaktiven Bereiche, die Schleifmischungen oder aber auch die Festigkeit der Schruppscheibe zu beeinflussen. Der Stabilisierungskern nimmt nämlich während des Schleifens auf die mindestens eine Schleifschicht einwirkende Kräfte auf und überträgt sie gleichmäßig über auf die Antriebswelle des Werkzeugs. Gleichsam überträgt der Stabilisierungskern die von einem Nutzer ausgehenden Kräfte über die Antriebswelle des Werkzeugs gleichmäßig auf die mindestens eine Schleifschicht. Der Stabilisierungskern dient somit zudem als Kraftübertragungselement zwischen der mindestens einen Schleifschicht und der Anbindung an eine Antriebswelle eines Werkzeugs. Die Vorteile der erfindungsgemäßen Schruppscheibe liegen sowohl in der Konzentration von Masse im Bereich ihres Rotationszentrums als auch in der indirekten Kraftübertragung zwischen der mindestens einen Schleifschicht und der Antriebswelle des Werkzeugs. Dadurch bleibt die Schruppscheibe auch bei großen Krafteinwirkungen bzw. Anpressdrücken und/oder hohen Drehzahlen stets stabil und gut beherrschbar.Especially in the area of the central recess, where loads arising from the grinding process, such as rotational forces and side loads, are concentrated, the stabilizing core can optimize the grinding wheel in terms of its stability without affecting the grinding-active areas, the grinding mixtures or the strength of the grinding wheel. This is because the stabilizing core absorbs the forces acting on the at least one grinding layer during grinding and transmits them evenly to the drive shaft of the tool. At the same time, the stabilization core transmits the forces emanating from a user via the drive shaft of the tool evenly to the at least one grinding layer. The stabilization core thus also serves as a power transmission element between the at least one grinding layer and the connection to a drive shaft of a tool. The advantages of the grinding disc according to the invention lie both in the concentration of mass in the area of its center of rotation and in the indirect power transmission between the at least one abrasive layer and the drive shaft of the tool. As a result, the grinding wheel always remains stable and easy to control, even with large forces or contact pressures and/or high speeds.
Bei einer bevorzugten Ausführungsform der Schruppscheibe nach der Erfindung liegt ein Verhältnis des Außenradius des Stabilisierungskerns zu einem Außenradius der Schruppscheibe zwischen 2 : 50 und 25 : 50. Vorzugsweise beträgt das Verhältnis 17 : 50. Dieses Verhältnis führt zu einer optimalen Stabilität bei gleichzeitig größtmöglicher Schleiffläche.In a preferred embodiment of the grinding disc according to the invention, the ratio of the outer radius of the stabilizing core to an outer radius of the grinding disc is between 2:50 and 25:50. The ratio is preferably 17:50. This ratio leads to optimum stability with the largest possible grinding surface at the same time.
Dadurch, dass der Grundkörper mindestens zwei Schleifschichten aufweist, wobei jeweils eine Trennschicht zwischen zwei benachbarten Schleifschichten angeordnet ist, ergeben sich im Zusammenspiel mit dem Stabilisierungskern Vorteile gegenüber bekannten Schruppscheiben für den Fall, dass sowohl die Stabilität als auch die Festigkeit der Schruppscheibe optimiert werden soll. Bei einer bekannten Schruppscheibe wird nämlich versucht, eine Anpassung und Verbesserung der Stabilität und Festigkeit durch zwischen einzelnen Schleifschichten angeordnete Trennschichten zu kompensieren. Hierbei ergibt sich jedoch ein Zielgrößenkonflikt zwischen Stabilität und Festigkeit, da sich diese beiden Zielgrößen gegenseitig beeinflussen. Im Vergleich zu der bekannten Schruppscheibe lässt sich durch den Einsatz eines Kerns in Kombination mit Trennschichten eine weitere Anpassung und Verbesserung der Stabilität und Festigkeit getrennt voneinander erreichen. Der Kern dient nämlich der Stabilisierung der Schruppscheibe während ihrer Rotation. Demgegenüber dient die Trennschicht der Festigkeit der Schruppscheibe. So können beide Zielgrößen unabhängig voneinander optimiert oder maximiert werden, um verbesserte Produkteigenschaften zu gewährleisten. Die Schleifschichten können mit diversen Füllstoffen und Additiven versetzt sein. Die Schleifschichten können schleifaktiven Körnungen, wie Normalkorund braun (regulär brown fused alumin) und Derivate, Aluminiumoxid blau (blue fired alumina), Edelkorund weiß (white fused alumina), Zirkonkorund (zirconia alumina), Siliciumcarbid, Keramikkorn (ceramic grain), Edelkorund rosa (pink fused alumina) und/oder einkristallines Aluminiumoxid (monocrystalline alumina) umfassen. Zudem können die Schleifschichten unterstützende Füllstoffe, wie Polyaluminiumfluorid, Kryolit, Pyrit, Calcit, Wollastonit und/oder Graphit umfassen, welche mit Phenolharzsystemen gebunden sein können.Due to the fact that the base body has at least two grinding layers, with a separating layer being arranged between two adjacent grinding layers, the interaction with the stabilizing core results in advantages over known grinding wheels in the event that both the stability and the strength of the grinding wheel are to be optimized. In the case of a known grinding wheel, an attempt is made to compensate for an adaptation and improvement in stability and strength by means of separating layers arranged between individual grinding layers. However, there is a target variable conflict between stability and strength, since these two target variables influence each other. Compared to the well-known grinding disc, the use of a core in combination with separating layers allows further adjustment and improvement of stability and strength to be achieved separately from one another. The core serves to stabilize the grinding wheel during its rotation. In contrast, the separating layer serves to strengthen the grinding wheel. In this way, both target values can be optimized or maximized independently of one another in order to ensure improved product properties. Various fillers and additives can be added to the grinding layers. The grinding layers can contain grinding active grains such as regular brown fused aluminum and derivatives, blue aluminum oxide (blue fired alumina), white fused aluminum oxide, zirconium aluminum oxide (zirconia alumina), silicon carbide, ceramic grain, pink aluminum oxide (pink fused alumina) and/or monocrystalline aluminum oxide (monocrystalline alumina). In addition, the grinding layers can contain supporting fillers such as polyaluminum fluoride, cryolite, pyrite, Calcite, wollastonite and/or graphite which may be bonded with phenolic resin systems.
Durch die Zuordnung eines Kernsegments zu mindestens einer der Schleifschichten ist es möglich, die Schruppscheibe schichtweise aufzubauen, ohne auf die Vorteile der Erfindung zu verzichten. Bei dieser Ausführung erstreckt sich somit die mindestens eine Trennschicht von Ausnehmung oder einer Nabe bis zum Außenrand der Schruppscheibe. Die einzelnen Kernsegmente sind indirekt über die entsprechende Trennschicht miteinander verbunden. Zwischen benachbarten Trennschichten sind jeweils eine Schleifschicht und ein der entsprechenden Schleifschicht zugeordnetes Kernsegment angeordnet. Die Stabilität der Schruppscheibe ist dadurch gewährleistet, dass die einzelnen Kernsegmente gemeinsam der Festigkeit der Schruppscheibe dienen und den Stabilisierungskern definieren.By assigning a core segment to at least one of the grinding layers, it is possible to build up the grinding wheel in layers without sacrificing the advantages of the invention. In this embodiment, the at least one separating layer extends from the recess or a hub to the outer edge of the grinding wheel. The individual core segments are connected to one another indirectly via the corresponding separating layer. An abrasive layer and a core segment assigned to the corresponding abrasive layer are arranged in each case between adjacent separating layers. The stability of the grinding disc is ensured by the fact that the individual core segments together serve to strengthen the grinding disc and define the stabilizing core.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.Further advantages and advantageous configurations of the subject matter of the invention can be found in the description, the drawing and the patent claims.
Ein Ausführungsbeispiel einer Schruppscheibe nach der Erfindung ist in der Zeichnung schematisch vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.An exemplary embodiment of a grinding wheel according to the invention is shown in a schematically simplified manner in the drawing and is explained in more detail in the following description.
Die einzige Figur zeigt einen Schnitt durch eine erfindungsgemäße Schruppscheibe. Die in der Zeichnung dargestellte Schruppscheibe 1 weist einen Grundkörper 3 mit einem schichtartigen Aufbau auf. Der Grundkörper 3 umfasst eine zentrale Ausnehmung 2, welche von einer Drehachse 5 durchgriffen ist, welche im Rotationszentrum der Schruppscheibe 1 liegt. In der Ausnehmung 2 ist ein Einsatz 4 zum Befestigen der Schruppscheibe 1 an einer Antriebswelle eines Werkzeugs angeordnet. An der dem Werkzeug zugewandten Werkzeugseite der Schruppscheibe ist eine Verstärkungsschicht 6 angeordnet. Die Verstärkungsschicht 6 kann Rutil, Wollastonit, Calcit und/oder Basalt umfassen, welche phenolharzgebunden sein können. Eine Korngröße kann zwischen 0,1 mm bis 1,0 mm, vorzugsweise 0,2 mm und 0,5 mm liegen. Zudem kann die Verstärkungsschicht 6 Quarzsand umfassen. Somit weist die Verstärkungsschicht 6 eine hohe Festigkeit auf. Sie kann eine netzartige Einlage umfassen, um die Stabilität der Schruppscheibe 1 weiter zu erhöhen.The only figure shows a section through a grinding wheel according to the invention. The
Die Schruppscheibe 1 weist zudem zwei Schleifschichten 8a, 8b auf, welche an der der Werkzeugseite der Verstärkungsschicht 6 abgewandten Seite angeordnet sind. Die Schleifschichten 8a, 8b können schleifaktiven Körnungen, wie Normalkorund braun (regular brown fused alumin) und Derivate, Aluminiumoxid blau (blue fired alumina), Edelkorund weiß (white fused alumina), Zirkonkorund (zirconia alumina), Siliciumcarbid, Keramikkorn (ceramic grain), Edelkorund rosa (pink fused alumina) und/oder einkristallines Aluminiumoxid (monocrystalline alumina) umfassen. Zudem können die Schleifschichten unterstützende Füllstoffe, wie Polyaluminiumfluorid, Kryolit, Pyrit, Calcit, Wollastonit und/oder Graphit umfassen, welche mit Phenolharzsystemen gebunden sein können. Somit ist eine Phenolharz-Schleifkornmischung gebildet, die mit diversen Füllstoffen und Additiven versetzt sein kann. Zwischen den beiden Schleifschichten 8a, 8b ist eine Trennschicht 10 angeordnet. Zudem ist eine weitere Trennschicht 10 zwischen der Verstärkungsschicht 6 und der Schleifschicht 8a angeordnet. Die Trennschichten 10 sind jeweils gebildet aus einer Glasgewebelage und dienen der Festigkeit der Schruppscheibe 1. Die Trennschichten 10 erstrecken sich von einem Außenrand der Schruppscheibe 1 bis zu der zentralen Ausnehmung 2 bzw. umgreifen die zentrale Ausnehmung 2 ringförmig.The
Zudem umfasst die Schruppscheibe 1 einen Stabilisierungskern 12, welcher um die Drehachse 5 der Schruppscheibe 1 herum umlaufend an die zentrale Ausnehmung 2 angrenzt, bzw. abschnittsweise den Rand der zentralen Ausnehmung 2 bildet. Der Stabilisierungskern 12 kann Rutil, Wollastonit, Calcit und/oder Basalt umfassen, welche phenolharzgebunden sein können. Eine Korngröße kann zwischen 0,1 mm bis 1,0 mm, vorzugsweise 0,2 mm und 0,5 mm liegen. Zudem kann die Verstärkungsschicht 6 Quarzsand umfassen. Der Stabilisierungskern 12 weist eine höhere Festigkeit als die Schleifschichten 8a, 8b auf. Der Stabilisierungskern 12 ist gebildet aus zwei Kemsegmenten 12a, 12b und dient als Kraftübertragungselement zwischen den zwei Schleifschichten 8a, 8b und der Anbindung an die Antriebswelle des Werkzeugs.In addition, the
Jeder Schleifschicht 8a, 8b ist ein Kernsegment 12a, 12b des Stabilisierungskerns 12 zugeordnet. Das Kernsegment 12a ist zwischen zwei daran angrenzenden Trennschichten 10 angeordnet. Das Kernsegment 12b grenzt werkzeugseitig an eine Trennschicht 10 an und ist werkstückseitig offen, d.h. von einer Trennschicht 10 unbedeckt. Daraus folgt, dass die Trennschichten 10 den Stabilisierungskern 12 in zwei Kernsegmente 12a, 12b unterteilen. Die zwei benachbarten Kernsegmente 12a, 12b sind über die dazwischen angeordnete Trennschicht 10 miteinander verbunden und definieren den Stabilisierungskern 12.A
Der Außenradius a des Stabilisierungskerns 12 hat ein Verhältnis zum Außenradius b der Schruppscheibe von 17 : 50. Zudem hat der Stabilisierungskern 12 über seine Dicke bzw. in axialer Richtung der Schruppscheibe einen konstanten Radius.The outer radius a of the stabilizing
Um eine optimale Anbindung an ein Werkzeug zu gewährleisten, ist die zentrale Ausnehmung 2 als versenkte Nabe ausgeführt.In order to ensure an optimal connection to a tool, the
- 11
- Schruppscheibegrinding wheel
- 22
- zentrale Ausnehmungcentral recess
- 33
- Grundkörperbody
- 44
- Einsatzcommitment
- 55
- Drehachseaxis of rotation
- 66
- Verstärkungsschichtreinforcement layer
- 8a, 8b8a, 8b
- Schleifschichtabrasive layer
- 1010
- Trennschichtrelease layer
- 1212
- Stabilisierungskernstabilization core
- 12a, 12b12a, 12b
- Kernsegmentcore segment
Claims (9)
- A rough grinding wheel for processing material surfaces, comprising a wheel-shaped base body (3) comprising a central recess (2) penetrated by an axis of rotation (5) for direct or indirect connection to a drive shaft of a tool, at least two abrasive layers (8a, 8b) and a reinforcing layer (6) which supports the at least two abrasive layers (8a, 8b), and the rough grinding wheel comprising a stabilizing core (12) for stabilizing the rough grinding wheel, said stabilizing core (12) being associated with the at least two abrasive layers (8a, 8b), being circumferentially adjacent to the central recess (2) and having higher strength than the at least two abrasive layers (8a, 8b), a separating layer (10) being arranged between two adjacent abrasive layers (8a, 8b) in each case, characterised in that a core segment (12a, 12b) is associated with each of the abrasive layers (8a, 8b), the core segments (12a, 12b) defining the stabilizing core (12) and being connected to each other indirectly via the corresponding separating layer (10).
- The rough grinding wheel according to claim 1,
characterised in that
a ratio of the outer radius (a) of the stabilizing core (12) to an outer radius (b) of the rough grinding wheel is between 2 : 50 und 25 : 50, preferably 17 : 50. - The rough grinding wheel according to any one of the claims 1 or 2,
characterised in that
the stabilizing core (12) has a constant outer radius (a) across its thickness. - The rough grinding wheel according to any one of the claims 1 to 3,
characterised in that
the central recess (2) is a recessed hub. - The rough grinding wheel according to any one of the claims 1 to 4,
characterised in that
the stabilizing core (12) comprises rutile, wollastonite, calcite and basalt, which are phenolic resin-bonded. - The rough grinding wheel according to any one of the claims 1 to 5,
characterised in that
the reinforcing layer (6) comprises rutile, wollastonite, calcite and basalt, which are phenolic resin-bonded. - The rough grinding wheel according to claim any one of the claims 1 to 6,
characterised in that
the at least one abrasive layer (8a, 8b) comprises abrasive grits, such as regular brown fused alumina and derivatives, blue fired alumina, white fused alumina, zirconia alumina, silicon carbide, ceramic grain, pink fused alumina and/or monocrystalline alumina, wherein supporting fillers may be provided, such as polyaluminium fluoride, cryolite, pyrite, calcite, wollastonite and/or graphite, which may be bonded by means of phenolic resin systems. - The rough grinding wheel according to any one of the claims 1 to 7,
characterised in that
the at least one separating layer (10) comprises a glass fabric. - The rough grinding wheel according to any one of the claims 1 to 8,
characterised in that
a separating layer (10) is arranged between the reinforcing layer (6) and the at least two abrasive layers (8a, 8b).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201631507T SI3081337T1 (en) | 2015-04-02 | 2016-03-07 | Roughing disc with core |
| HRP20220507TT HRP20220507T1 (en) | 2015-04-02 | 2016-03-07 | Roughing disc with core |
| RS20220341A RS63129B1 (en) | 2015-04-02 | 2016-03-07 | Roughing disc with core |
| PL16158947T PL3081337T3 (en) | 2015-04-02 | 2016-03-07 | Roughing disc with core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015004355 | 2015-04-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3081337A1 EP3081337A1 (en) | 2016-10-19 |
| EP3081337B1 true EP3081337B1 (en) | 2022-02-16 |
Family
ID=55532143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16158947.8A Active EP3081337B1 (en) | 2015-04-02 | 2016-03-07 | Roughing disc with core |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US20160288295A1 (en) |
| EP (1) | EP3081337B1 (en) |
| CA (1) | CA2924939C (en) |
| DK (1) | DK3081337T3 (en) |
| ES (1) | ES2910650T3 (en) |
| HR (1) | HRP20220507T1 (en) |
| HU (1) | HUE058349T2 (en) |
| PL (1) | PL3081337T3 (en) |
| PT (1) | PT3081337T (en) |
| RS (1) | RS63129B1 (en) |
| SI (1) | SI3081337T1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018130237A1 (en) * | 2017-01-16 | 2018-07-19 | Klingspor Ag | Roughing disk with a core comprising at least one grinding additive |
| EP3421178A1 (en) | 2017-06-26 | 2019-01-02 | Dronco GmbH | Method of manufacturing an abrasive member, in particular rotary abrasive disc and abrasive member, in particular rotary abrasive disc |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3545308A1 (en) * | 1985-12-20 | 1987-06-25 | Feldmuehle Ag | GRINDING DISC WITH DAMPING |
| DE9420676U1 (en) * | 1994-12-24 | 1995-02-23 | Schleifmittel Werk Karl Seiffe | Recyclable grinding wheel zones |
| DE10359747A1 (en) * | 2003-12-19 | 2005-07-14 | August Rüggeberg Gmbh & Co. Kg | Rough-grinding wheel |
| BRPI0923722A2 (en) * | 2008-12-30 | 2017-07-11 | Saint Gobain Abrasives Inc | REINFORCED GLUED ABRASIVE TOOLS |
| EP2830829B1 (en) * | 2012-03-30 | 2018-01-10 | Saint-Gobain Abrasives, Inc. | Abrasive products having fibrillated fibers |
| WO2014210440A1 (en) * | 2013-06-28 | 2014-12-31 | Saint-Gobain Abrasives, Inc. | Abrasive article |
| WO2016003940A1 (en) * | 2014-06-29 | 2016-01-07 | Saint-Gobain Abrasives, Inc. | Abrasive article including a core and a bonded abrasive body |
-
2016
- 2016-03-07 RS RS20220341A patent/RS63129B1/en unknown
- 2016-03-07 PT PT161589478T patent/PT3081337T/en unknown
- 2016-03-07 HU HUE16158947A patent/HUE058349T2/en unknown
- 2016-03-07 HR HRP20220507TT patent/HRP20220507T1/en unknown
- 2016-03-07 SI SI201631507T patent/SI3081337T1/en unknown
- 2016-03-07 PL PL16158947T patent/PL3081337T3/en unknown
- 2016-03-07 DK DK16158947.8T patent/DK3081337T3/en active
- 2016-03-07 ES ES16158947T patent/ES2910650T3/en active Active
- 2016-03-07 EP EP16158947.8A patent/EP3081337B1/en active Active
- 2016-03-22 US US15/077,064 patent/US20160288295A1/en not_active Abandoned
- 2016-03-24 CA CA2924939A patent/CA2924939C/en active Active
-
2019
- 2019-04-18 US US16/388,088 patent/US11235437B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| HRP20220507T1 (en) | 2022-06-10 |
| CA2924939C (en) | 2017-12-05 |
| ES2910650T3 (en) | 2022-05-13 |
| PL3081337T3 (en) | 2022-06-06 |
| EP3081337A1 (en) | 2016-10-19 |
| US20190240809A1 (en) | 2019-08-08 |
| US20160288295A1 (en) | 2016-10-06 |
| PT3081337T (en) | 2022-04-11 |
| HUE058349T2 (en) | 2022-07-28 |
| RS63129B1 (en) | 2022-05-31 |
| US11235437B2 (en) | 2022-02-01 |
| DK3081337T3 (en) | 2022-04-25 |
| SI3081337T1 (en) | 2022-06-30 |
| CA2924939A1 (en) | 2016-10-02 |
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