EP0451509B1 - Abrading device - Google Patents
Abrading device Download PDFInfo
- Publication number
- EP0451509B1 EP0451509B1 EP91103599A EP91103599A EP0451509B1 EP 0451509 B1 EP0451509 B1 EP 0451509B1 EP 91103599 A EP91103599 A EP 91103599A EP 91103599 A EP91103599 A EP 91103599A EP 0451509 B1 EP0451509 B1 EP 0451509B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- abrasive body
- grinding
- wings
- wing tip
- abrasive
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S451/00—Abrading
- Y10S451/921—Pad for lens shaping tool
Definitions
- the invention relates to an abrasive wheel according to the preamble of claim 1.
- dome or hemispherical supports are usually used, on which numerous sintered grinding bodies, e.g. B. so-called diamond pellets.
- these diamond pellets must be dressed, i.e. H. be ground to the exact concave shape, which is a very labor-intensive process.
- DE-A-3 535 659 describes a flexible, deformable sintered grinding wheel which is suitable for grinding wheel carriers with a concave or convex curved surface or for wrapping around grinding rolls. This grinding wheel itself is not curved.
- the invention has for its object to provide an abrasive body which can be applied to the carrier in a simple manner, which does not require expensive dressing, and which ensures an excellent grinding effect.
- the invention is based on the knowledge that this object can be achieved by a grinding body made of plastically deformable alloy with a particulate abrasive grain if the grinding body is given a suitable shape.
- the invention relates to an abrasive body as defined in claim 1.
- the curved shape of the wings Due to the curved shape of the wings, a better grinding effect is achieved, while also protecting the Edges of the workpiece and a better coolant flow is guaranteed.
- the curved wing shape leads to a better grinding pattern and better coolant ejection. This enables grinding under high pressure and high coolant consumption.
- the grinding process is significantly improved by the better cooling. Due to the concave shaped grinding surface, the grinding wheel can be easily applied to appropriately shaped supports, for example ball end mills.
- a plastically deformable alloy is selected as the material for the grinding wheel. This allows the grinding wheel to be easily adapted to any shape of a carrier under pressure.
- the grinding body is formed in one piece. This facilitates the use of the grinding wheel.
- the flails preferably have cooling water channels running from a central opening to the wing tip. This also improves cooling.
- the cooling water channels preferably end in front of the wing tip in order to give the grinding body a closed and as stable a shape as possible.
- the coolant is supplied in the usual way through a central bore in the carrier, which is aligned with the central bore in the grinding body, and thus distributed uniformly in the coolant channels.
- the slider body In such a way that the wings become wider towards the wing tip.
- the wings In order to protect the workpiece, it is particularly advantageous to give the wings an essentially rounded shape, which is particularly true of those portions of the wing that first strike the workpiece.
- the single figure shows a grinding wheel according to the invention.
- the grinding wheel 1 has vanes 2. Cooling water channels 5 extend from a central opening 3 in the direction of the wing tips 8. The wings are curved in the running direction, in the illustrated case clockwise. Both the cooling water channels 5 arranged in the wings 2 and the wing interspaces 4 widen outwards. The front wing end 6 is round, while the rear wing end 7 can be round or, as shown, somewhat angular. The grinding wheel can be used for both left and right rotation if the blades are bent in one direction or the other.
- the alloy described in German Patent 35 35 695 is preferably used as the plastically deformable alloy. Reference is made in full to the disclosure of this patent specification.
- the bronze alloy used according to the invention for the grinding wheel has a content, based on the alloy, of 70-98% by weight of Cu 3 - 30 wt% Ag 0-1% by weight of Si and 0.05-3% by weight of Sn, Pb. Zn and / or Cd.
- Diamond is primarily used as the abrasive grain.
- the grain size can be selected within wide limits depending on the intended use, for example a D25 grain can be used.
- the concentration of the abrasive grain in the alloy can also be very different, with suitable concentrations between C5 and C100.
- the dimensions of the grinding wheel primarily depend on the dimensions of the workpiece.
- the dimensions lie approximately in the following ranges: diameter of the grinding wheel 8 to 20 cm, diameter of the central opening 1 to 3 cm and number of wings 6 to 15.
- the thickness of the grinding wheel is generally between 0.5 and 5 mm, preferably 2 to 3 mm.
- the grinding wheels according to the invention are, for. B. used in metal spherical end mills. Compared to other materials, plastic, deformable materials have the advantage that the abrasive body formed from them adapts exactly to the shape of the spherical cap under pressure.
- the grinding wheels are preferably glued into the calotte, for example with an epoxy resin adhesive.
- a reversible attachment is also possible, for example with a hot melt adhesive, so that the grinding wheel can be loosened again in the heat and can be used on another carrier with a different radius under certain circumstances.
- Pellets Before the grinding process, only a slight post-treatment of the grinding wheel is necessary, in contrast to the complex post-treatment that is required when using pellets. Pellets have to be brought into the concave shape by grinding, for example with silicon carbide.
- the grinding wheels are particularly suitable for grinding glass, but also ceramic materials and metals.
- the grinding wheel according to the invention is characterized by improved cooling and improved grinding action. Due to its shape, it is easily adaptable to any carrier shape.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Schleifkörper nach dem Oberbegrift des Anspruchs 1.The invention relates to an abrasive wheel according to the preamble of
Zum Grob- und Feinschleifen von konkaven oder konvexen Flächen auf Metall-, Keramik-, Glaskörpern und dergleichen werden üblicherweise kalotten- oder halbkugelförmige Träger verwendet, auf denen zahlreiche gesinterte Schleifkörper, z. B. sogenannte Diamantpellets, befestigt werden. Diese Diamantpellets müssen jedoch abgerichtet, d. h. in die exakte konkave Form geschliffen werden, was ein sehr arbeitsaufwendiger Arbeitsgang ist.For coarse and fine grinding of concave or convex surfaces on metal, ceramic, glass bodies and the like, dome or hemispherical supports are usually used, on which numerous sintered grinding bodies, e.g. B. so-called diamond pellets. However, these diamond pellets must be dressed, i.e. H. be ground to the exact concave shape, which is a very labor-intensive process.
In der DE-A-3 535 659 wird ein biegsamer, verformbarer Sinterschleifkörper beschrieben, der sich für Schleifkörperträger mit konkav oder konvex gekrümmter Fläche oder zum Umwickeln von Schleifwalzen eignet. Dieser Schleifkörper ist selbst nicht gekrümmt geformt.DE-A-3 535 659 describes a flexible, deformable sintered grinding wheel which is suitable for grinding wheel carriers with a concave or convex curved surface or for wrapping around grinding rolls. This grinding wheel itself is not curved.
Der Erfindung liegt die Aufgabe zugrunde, einen Schleifkörper zu schaffen, der in einfacher Weise auf dem Träger aufgebracht werden kann, der kein aufwendiges Abrichten erforderlich macht, und der eine ausgezeichnete Schleifwirkung gewährleistet.The invention has for its object to provide an abrasive body which can be applied to the carrier in a simple manner, which does not require expensive dressing, and which ensures an excellent grinding effect.
Der Erfindung liegt die Erkenntnis zugrunde, daß diese Aufgabe durch einen Schleifkörper aus plastisch verformbarer Legierung mit teilchenförmigem Schleifkorn gelöst werden kann, wenn dem Schleifkörper eine geeignete Form gegeben wird.The invention is based on the knowledge that this object can be achieved by a grinding body made of plastically deformable alloy with a particulate abrasive grain if the grinding body is given a suitable shape.
Gegenstand der Erfindung ist ein Schleifkörper wie er im Anspruch 1 definiert ist.The invention relates to an abrasive body as defined in
Durch die gebogene Form der Flügel wird eine bessere Schleifwirkung erzielt, wobei auch eine Schonung der Kanten des Werkstückes erfolgt und ein besserer Kühlmittelfluß gewährleistet ist. Die gebogene Flügelform führt zu einem besseren Schliffbild und besserem Kühlmittelauswurf. Schleifen unter hohem Druck und hohem Kühlmitteleinsatz sind auf diese Weise möglich. Durch die bessere Kühlung wird der Schleifprozess entscheidend verbessert. Durch die konkav geformte Schleiffläche, läßt sich der Schleifkörper leicht auf entsprechend geformte Träger, beispielsweise Kugelkopffräser, aufbringen.Due to the curved shape of the wings, a better grinding effect is achieved, while also protecting the Edges of the workpiece and a better coolant flow is guaranteed. The curved wing shape leads to a better grinding pattern and better coolant ejection. This enables grinding under high pressure and high coolant consumption. The grinding process is significantly improved by the better cooling. Due to the concave shaped grinding surface, the grinding wheel can be easily applied to appropriately shaped supports, for example ball end mills.
Als Material für den Schleifkörper wird eine plastisch verformbare Legierung gewählt. Dadurch kann der Schleifkörper unter Druck leicht jeder Form eines Trägers angepaßt werden.A plastically deformable alloy is selected as the material for the grinding wheel. This allows the grinding wheel to be easily adapted to any shape of a carrier under pressure.
Gemaß einer bevorzugten Ausführungsform ist der Schleifkörper einstückig ausgebildet. Dies erleichtert den Einsatz des Schleifkörpers.According to a preferred embodiment, the grinding body is formed in one piece. This facilitates the use of the grinding wheel.
Vorzugsweise weisen die Flegel ausgehend von einer Zentralöffnung zur Flügelspitze hin laufende Kühlwasserkanäle auf. Auf diese Weise wird die Kühlung ebenfalls verbessert. Vorzugsweise enden die Kühlwasserkanäle jedoch vor der Flügelspitze, um dem Schleifkörper eine geschlossene und möglichst stabile Form zu geben. Zur weiteren Erhöhung der Kühlwirkung ist es vorteilhaft, die Kühlwasserkanäle so zu gestalten, daß sie sich zur Flügelspitze hin erweitern. Das Kühlmittel wird in üblicher Weise durch eine zentrale Bohrung im Träger, welche mit der zentralen Bohrung im Schleifkörper zur Deckung gebracht ist, zugeführt, und so in den Kühlmittelkanälen gleichmäßig verteilt.The flails preferably have cooling water channels running from a central opening to the wing tip. This also improves cooling. However, the cooling water channels preferably end in front of the wing tip in order to give the grinding body a closed and as stable a shape as possible. To further increase the cooling effect, it is advantageous to design the cooling water channels in such a way that they expand towards the wing tip. The coolant is supplied in the usual way through a central bore in the carrier, which is aligned with the central bore in the grinding body, and thus distributed uniformly in the coolant channels.
Zwecks optimaler Flächenauslegung ist es vorteilhaft, den Schleikörper so zu dimensionieren, daß die Flügel zur Flügelspitze hin breiter werden.For the purpose of optimal surface design, it is advantageous to dimension the slider body in such a way that the wings become wider towards the wing tip.
Es ist insbesondere zur Schonung des Werkstückes vorteilhaft, den Flügeln im wesentlichen abgerundete Form zu geben, was inbesondere auf jene Abschnitte des Flügels zutrifft, die auf das Werkstück zuerst auftreffen.In order to protect the workpiece, it is particularly advantageous to give the wings an essentially rounded shape, which is particularly true of those portions of the wing that first strike the workpiece.
Die Erfindung wird nachstehend anhand der Zeichnung näher erläutert.The invention is explained below with reference to the drawing.
Die einzige Figur zeigt einen erfindungsgemäßen Schleifkörper.The single figure shows a grinding wheel according to the invention.
Der Schleifkörper 1 weist Flügel 2 auf. Von einer Zentralöffnung 3 erstrecken sich Kühlwasserkanäle 5 in Richtung der Flügelspitzen 8. Die Flügel sind in Laufrichtung, im gezeichneten Fall im Uhrzeigersinn, gebogen geformt. Sowohl die in den Flügeln 2 angeordneten Kühlwasserkanäle 5 als auch die Flügelzwischenräume 4 erweitern sich nach außen hin. Das vordere Flügelende 6 ist rund ausgebildet, während das hintere Flügelende 7 rund, oder wie gezeichnet etwas eckig geformt sein kann. Der Schleifkörper kann sowohl für Links- als auch für Rechtslauf eingesetzt werden, wenn dementsprechend die Flügel in die eine oder andere Richtung gebogen sind.The
Als plastisch verformbare Legierung wird vorzugsweise die in der deutschen Patentschrift 35 35 695 beschriebene Legierung verwendet. Auf die Offfenbarung dieser Patentschrift wird vollinhaltlich Bezug genommen. Die für den Schleifkörper erfindungsgemäß verwendete Bronzelegierung weist einen Gehalt, bezogen auf die Legierung, von
70 - 98 Gew. % Cu
3 - 30 Gew % Ag
0 - 1 Gew. % Si und
0,05 - 3 Gew. % Sn, Pb. Zn und/oder Cd auf.The alloy described in German Patent 35 35 695 is preferably used as the plastically deformable alloy. Reference is made in full to the disclosure of this patent specification. The bronze alloy used according to the invention for the grinding wheel has a content, based on the alloy, of
70-98% by weight of Cu
3 - 30 wt% Ag
0-1% by weight of Si and
0.05-3% by weight of Sn, Pb. Zn and / or Cd.
Als Schleifkorn wird in erster Linie Diamant eingesetzt. Die Korngröße kann je nach Verwendungszweck in weitesten Grenzen gewählt werden, beispielsweise kommt ein D25-Korn in Betracht. Auch die Konzentration des Schleifkorns in der Legierung kann sehr unterschiedlich sein, wobei geeignete Konzentrationen zwischen C5 und C100 liegen.Diamond is primarily used as the abrasive grain. The grain size can be selected within wide limits depending on the intended use, for example a D25 grain can be used. The concentration of the abrasive grain in the alloy can also be very different, with suitable concentrations between C5 and C100.
Die Abmessungen des Schleifkörpers hängen in erster Linie von den Dimensionen des Werkstücks ab. Zum Schleifen von Brillengläsern, wofür sich der erfindungsgemäße Schleifkörper besonders eignet, liegen die Abmessungen etwa in folgenden Bereichen: Durchmesser des Schleifkörpers 8 bis 20 cm, Durchmesser der Zentralöffnung 1 bis 3 cm und Anzahl der Flügel 6 bis 15.The dimensions of the grinding wheel primarily depend on the dimensions of the workpiece. For grinding glasses, for which the grinding wheel according to the invention is particularly suitable, the dimensions lie approximately in the following ranges: diameter of the
Die Stärke des Schleifköpers beträgt im allgemeinen zwischen 0,5 und 5 mm, vorzugsweise 2 bis 3 mm.The thickness of the grinding wheel is generally between 0.5 and 5 mm, preferably 2 to 3 mm.
Die erfindungsgemäßen Schleifkörper werden z. B. in Metallkalotten von Kugelkopffräsern eingesetzt. Gegenüber anderen Materialen, weisen plastische, verformbare Materialien den Vorteil auf, daß sich der daraus geformte Schleifkörper unter Druck exakt der Form der Kalotte anpaßt.The grinding wheels according to the invention are, for. B. used in metal spherical end mills. Compared to other materials, plastic, deformable materials have the advantage that the abrasive body formed from them adapts exactly to the shape of the spherical cap under pressure.
Vorzugsweise werden die Schleifkörper in die Kalotte eingeklebt, beispielsweise mit einem Epoxyharzkleber. Möglich ist auch eine reversible Befestigung, beispielsweise mit einem Schmelzkleber, sodaß sich der Schleifkörper in der Hitze wieder lösen läßt und auf einen anderen Träger mit unter Umständen anderem Radius einsetzen läßt.The grinding wheels are preferably glued into the calotte, for example with an epoxy resin adhesive. A reversible attachment is also possible, for example with a hot melt adhesive, so that the grinding wheel can be loosened again in the heat and can be used on another carrier with a different radius under certain circumstances.
Vor dem Schleifvorgang ist lediglich eine geringfügige Nachbehandlung des Schleifkörpers notwendig, und zwar im Gegensatz zur aufwendigen Nachbehandlung, die beim Einsatz von Pellets erforderlich ist. Pellets müssen in die konkave Form durch Abschleifen, beispielsweise mit Siliciumcarbid, gebracht werden.Before the grinding process, only a slight post-treatment of the grinding wheel is necessary, in contrast to the complex post-treatment that is required when using pellets. Pellets have to be brought into the concave shape by grinding, for example with silicon carbide.
Die Schleifkörper eignen sich besonders zum Schleifen von Glas, aber auch von keramischen Werkstoffen und Metallen.The grinding wheels are particularly suitable for grinding glass, but also ceramic materials and metals.
Der erfindungsgemäße Schleifkörper zeichnet sich durch verbesserte Kühlung und verbesserte Schleifwirkung aus. Durch seine Form ist er leicht an jede Trägerform anpaßbar.The grinding wheel according to the invention is characterized by improved cooling and improved grinding action. Due to its shape, it is easily adaptable to any carrier shape.
Claims (7)
- An abrasive body (1) for spherical carriers for grinding concave or convex surfaces, made of a plastically deformable alloy with a particulate abrasive grain, characterized in that the preshaped abrasive body (1) has a plurality of wings (2) bent with the wing tip (8) pointing in the moving direction.
- The abrasive body of claim 1, characterized in that the wings (2) have coolant ducts (5) extending from a central opening (3) toward the wing tip (8).
- The abrasive body of claims 1 and 2, characterized in that the wings (2) have substantially circular shapes.
- The abrasive body of at least one of claims 1 to 3, characterized in that the coolant ducts (5) end before the wing tip (8).
- The abrasive body of at least one of claims 1 to 4, characterized in that the coolant ducts (5) become broader toward the wing tip (8).
- The abrasive body of at least one of claims 1 to 5, characterized in that the wings (2) become broader toward the wing tip (8).
- The abrasive body of at least one of claims 1 to 6, characterized in that the abrasive body (1) is of integral design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT91103599T ATE94110T1 (en) | 1990-04-12 | 1991-03-08 | GRINDING BODY. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4011960A DE4011960A1 (en) | 1990-04-12 | 1990-04-12 | GRINDING BODY |
| DE4011960 | 1990-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0451509A1 EP0451509A1 (en) | 1991-10-16 |
| EP0451509B1 true EP0451509B1 (en) | 1993-09-08 |
Family
ID=6404348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91103599A Expired - Lifetime EP0451509B1 (en) | 1990-04-12 | 1991-03-08 | Abrading device |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5287662A (en) |
| EP (1) | EP0451509B1 (en) |
| JP (1) | JP2831148B2 (en) |
| AT (1) | ATE94110T1 (en) |
| DE (2) | DE4011960A1 (en) |
| ES (1) | ES2044633T3 (en) |
| FI (1) | FI94732C (en) |
| NO (1) | NO910799L (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0702615B1 (en) * | 1993-06-17 | 1997-10-22 | Minnesota Mining And Manufacturing Company | Patterned abrading articles and methods making and using same |
| DE69615393T2 (en) * | 1995-12-07 | 2002-07-04 | Bausch & Lomb Inc., Rochester | MONOMERS FOR REDUCING THE MODULE OF SILOXYNHYDROGELS |
| US6007415A (en) * | 1995-12-08 | 1999-12-28 | Norton Company | Sanding disks |
| US6736712B1 (en) * | 1999-05-07 | 2004-05-18 | Performance Abrasives Incorporated | Rotary sanding disk |
| US6846223B2 (en) * | 2000-12-09 | 2005-01-25 | Saint-Gobain Abrasives Technology Company | Abrasive wheels with workpiece vision feature |
| US20030143926A1 (en) * | 2002-01-30 | 2003-07-31 | Raffi Piliguian | Grinding or polishing arrangement |
| JP3843933B2 (en) * | 2002-02-07 | 2006-11-08 | ソニー株式会社 | Polishing pad, polishing apparatus and polishing method |
| DE102005010583A1 (en) * | 2005-03-04 | 2006-09-07 | Satisloh Gmbh | Polishing disc for a tool for fine machining of optically effective surfaces on in particular spectacle lenses |
| USD559649S1 (en) * | 2006-03-17 | 2008-01-15 | Ehwa Diamond Industrial Co., Ltd. | Grinding wheel shank |
| USD603884S1 (en) * | 2009-03-20 | 2009-11-10 | Michalec Ralph J | Pad for grinding or polishing ophthalmic lenses |
| DE102010019491B4 (en) * | 2010-04-30 | 2015-07-09 | Carl Zeiss Vision International Gmbh | Polishing tool for processing optical surfaces, in particular free-form surfaces |
| DE102010029792A1 (en) * | 2010-06-08 | 2011-12-08 | Robert Bosch Gmbh | Grinding tool for hand-guided grinding machine provided with rotary oscillation drive, has fastening section, and grinding pad that is provided with wave-shaped grinding surface that comprises projections and recess |
| JP6211188B2 (en) * | 2014-06-10 | 2017-10-11 | オリンパス株式会社 | Polishing tool, polishing method and polishing apparatus |
| DE102017216033A1 (en) * | 2017-09-12 | 2019-03-14 | Carl Zeiss Smt Gmbh | Method for processing a workpiece in the manufacture of an optical element |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2282650A (en) * | 1941-05-01 | 1942-05-12 | American Sandpaper Company | Abrasive article |
| DE884005C (en) * | 1951-12-28 | 1953-07-23 | Stella Schleifscheibenwerke Ro | Grinding tool with a cooled work surface |
| US2749681A (en) * | 1952-12-31 | 1956-06-12 | Stephen U Sohne A | Grinding disc |
| US2828197A (en) * | 1954-09-15 | 1958-03-25 | Norton Co | Metal bonded diamond wheels |
| DE1742705U (en) * | 1956-08-16 | 1957-04-04 | Wilhelm Blumberg & Co | RING-SHAPED ARTIFICIAL GRINDSTONE WITH COOLING WATER sprinkling. |
| FR1318689A (en) * | 1962-01-08 | 1963-02-22 | Tolly | Abrasive disc |
| US3186135A (en) * | 1962-04-04 | 1965-06-01 | Carborundum Co | Abrasive disc |
| US3385010A (en) * | 1966-03-25 | 1968-05-28 | Norton Co | Abrasive disc |
| US3583111A (en) * | 1966-08-22 | 1971-06-08 | David Volk | Lens grinding apparatus |
| US3780476A (en) * | 1972-08-08 | 1973-12-25 | Gen Motors Corp | Grinding wheel and mounting assembly |
| US4291508A (en) * | 1979-11-30 | 1981-09-29 | American Optical Corporation | Lens surfacing pad |
| DE3535659C1 (en) * | 1985-10-04 | 1987-04-02 | Swarovski & Co | Use of a bronze alloy for sintered grinding bodies |
| DD255903A1 (en) * | 1986-11-10 | 1988-04-20 | Textiltech Forsch | FLEXIBLE GRINDING BODY AND METHOD FOR THE PRODUCTION THEREOF |
-
1990
- 1990-04-12 DE DE4011960A patent/DE4011960A1/en active Granted
-
1991
- 1991-02-27 NO NO91910799A patent/NO910799L/en unknown
- 1991-03-01 FI FI911039A patent/FI94732C/en active
- 1991-03-08 AT AT91103599T patent/ATE94110T1/en not_active IP Right Cessation
- 1991-03-08 ES ES91103599T patent/ES2044633T3/en not_active Expired - Lifetime
- 1991-03-08 EP EP91103599A patent/EP0451509B1/en not_active Expired - Lifetime
- 1991-03-08 DE DE91103599T patent/DE59100353D1/en not_active Expired - Fee Related
- 1991-04-05 JP JP3073208A patent/JP2831148B2/en not_active Expired - Lifetime
- 1991-04-08 US US07/682,266 patent/US5287662A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI94732C (en) | 1995-10-25 |
| US5287662A (en) | 1994-02-22 |
| FI94732B (en) | 1995-07-14 |
| NO910799D0 (en) | 1991-02-27 |
| ES2044633T3 (en) | 1994-01-01 |
| JPH0796467A (en) | 1995-04-11 |
| FI911039A0 (en) | 1991-03-01 |
| DE4011960C2 (en) | 1993-02-25 |
| EP0451509A1 (en) | 1991-10-16 |
| JP2831148B2 (en) | 1998-12-02 |
| FI911039L (en) | 1991-10-13 |
| NO910799L (en) | 1991-10-14 |
| DE59100353D1 (en) | 1993-10-14 |
| DE4011960A1 (en) | 1991-10-17 |
| ATE94110T1 (en) | 1993-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0451509B1 (en) | Abrading device | |
| DE69034066T2 (en) | Abrasives and process for making them | |
| DE1544643B2 (en) | GRINDING BODIES, IN PARTICULAR FOR ELECTROLYTIC GRINDING | |
| DE2018344B2 (en) | Process for the manufacture of a body containing single diamond particles | |
| EP3165284B1 (en) | Refiner disk for a corn grinder | |
| DE2306780A1 (en) | TOOTHED TOOL FOR FINISHING GEAR WHEELS | |
| EP0332886B1 (en) | Thermoplastic abrasive blasting material | |
| DE3019699A1 (en) | FASTENING DEVICE FOR ATTACHING AN ACCESSORY PART TO A PROTECTIVE HELMET | |
| DE2910347A1 (en) | ROTARY DRILL CHISES FOR DEEP HOLES | |
| EP0540566B1 (en) | Cutting tool | |
| EP0115329B1 (en) | Saw teeth grinding machine | |
| EP3993938B1 (en) | Machining tool having asymmetrical teeth having cutting particles | |
| DE2542142C1 (en) | Bracket for cladding an armored item | |
| EP1136183B1 (en) | Diamond grinding segment and grinding tool for surface machining of workpieces | |
| DE1093692B (en) | Cutting tool, in particular for dressing grinding wheels | |
| EP0857552B1 (en) | Stone machining tool with improved first cut behavior | |
| EP0321969B1 (en) | Dressing roll and its manufacturing method | |
| DE1301221B (en) | Stripping device for guide surfaces on machine tools | |
| DE1544643C3 (en) | Abrasives, in particular for electrolytic grinding | |
| DE1940597C3 (en) | Diamond grinding wheel | |
| DE1952045A1 (en) | Multipurpose tool | |
| DE1544632C3 (en) | Process for the production of a foam | |
| EP2388095A1 (en) | Milling-cutter | |
| WO2009018994A1 (en) | Sharpener for sharpening blades, especially razor blades | |
| EP0282605B1 (en) | Boyscout knife or the like with a sheath |
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: 19910308 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES FR GB IT LI SE |
|
| 17Q | First examination report despatched |
Effective date: 19920217 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE ES FR GB IT LI SE |
|
| REF | Corresponds to: |
Ref document number: 94110 Country of ref document: AT Date of ref document: 19930915 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59100353 Country of ref document: DE Date of ref document: 19931014 |
|
| ITF | It: translation for a ep patent filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19930922 |
|
| ET | Fr: translation filed | ||
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2044633 Country of ref document: ES Kind code of ref document: T3 |
|
| 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 |
|
| 26N | No opposition filed | ||
| EAL | Se: european patent in force in sweden |
Ref document number: 91103599.6 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000224 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20000320 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000324 Year of fee payment: 10 Ref country code: ES Payment date: 20000324 Year of fee payment: 10 Ref country code: BE Payment date: 20000324 Year of fee payment: 10 Ref country code: AT Payment date: 20000324 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20000327 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20000428 Year of fee payment: 10 |
|
| 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: 20010308 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010308 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010309 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010309 |
|
| 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: 20010331 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 |
|
| BERE | Be: lapsed |
Owner name: D. SWAROVSKI & CO. Effective date: 20010331 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010308 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 91103599.6 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| 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: 20011130 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| 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: 20020101 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030203 |
|
| 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: 20050308 |