EP0769352A1 - Laminated grinding disc - Google Patents
Laminated grinding disc Download PDFInfo
- Publication number
- EP0769352A1 EP0769352A1 EP96890165A EP96890165A EP0769352A1 EP 0769352 A1 EP0769352 A1 EP 0769352A1 EP 96890165 A EP96890165 A EP 96890165A EP 96890165 A EP96890165 A EP 96890165A EP 0769352 A1 EP0769352 A1 EP 0769352A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding wheel
- recesses
- core
- composite grinding
- fabric
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/12—Cut-off wheels
Definitions
- the invention relates to a composite grinding wheel with a central, optionally corrugated or cranked wheel core with marginal recesses for anchoring a peripheral grinding ring.
- Composite grinding wheels with marginal recesses in the wheel core, which comprise approximately 2/3 of a circular arc, for anchoring the pressed-on grinding ring are e.g. from DE-PS 606 001 known for decades.
- the composite grinding wheel of the type mentioned at the outset is characterized in particular by the fact that the grinding ring has at least one, preferably on both sides of the wheel core, a known fabric insert, and connectors extending through the fabric insert (s) for connecting the fabric insert (s) ) are provided with the grinding ring material located in the recesses.
- the fabric inserts can be needled with one or more threads, that is sewn, or, for example, indentation bodies can be provided, the outer shape of which preferably corresponds to the profile of the recesses and the at least one fabric insert and the abrasive ring material located in the recesses penetrate.
- Such indenters are e.g. designed in the form of a nail board, i.e. as a disc with pins.
- Steel threads with a diameter of ⁇ 0.5 mm, Kevlar threads and glass threads, each with a diameter of ⁇ 1 mm are preferred as sewing material, combs made of steel and non-ferrous metals, temperature ( ⁇ 200 ° C) resistant plastics or ceramics, especially by casting or Injection molded bodies.
- the composite grinding wheel according to the invention is produced in a conventional manner so that first half of the grinding ring is layered in a press mold as a ring, then the wheel core is put on, the recesses in the wheel core being filled with grinding wheel material, and then the second half of the grinding wheel is piled up. Then, in the green state, the needles are pressed or the indentation bodies are pressed in, the mold is closed and the grinding ring is sintered under pressure and temperature.
- the composite grinding wheels according to the invention are designed as recyclable wheels in which the wheel core can be used again and again.
- the grinding ring remnant is ground away on one side, the material in the recesses is pressed out hydraulically and material remnants on the other side are removed.
- FIG. 1 shows a partial section through a composite grinding wheel with a round wheel core
- FIG. 2 shows corresponding partial sections of two variants
- FIG. 3 shows a detailed front view of the edge area of the wheel core in the direction of the wheel center
- FIG. 4 is a top view according to FIG. 3
- FIG. 5 is a detailed front view of the edge region of the disk core in the direction of the center of the disk of a variant according to FIG. 3
- FIG. 6 is a top view according to FIG. 5.
- FIG. 2 shows variants with two fabric inserts and a thickness of the grinding ring that increases towards the disk periphery.
- the wheel core 1 has recesses 7 distributed over its circumference according to DE-PS 606 001 for anchoring the grinding ring 4 on the wheel core 1, which are filled with abrasive material when the compound grinding wheel is finished.
- the two fabric inserts 5 are sewn together with the seam 6 through the green abrasive material.
- an indentation body 8 is provided in the form of a disk provided with pins, which corresponds to the shape of the recess 7 and is inserted from one side, so that the pins through at least one, preferably both, fabric inserts 5 and the one in between Green abrasive material pass through the recess 7 and the bottom disk of the indentation body 8 rests on one of the fabric inserts.
- the disc core is preferably made of steel or a special alloy or of high-strength plastic. With regard to reusability, metals and plastics should be given preference over ceramic disc cores, which are usually more prone to breakage when subjected to impact.
- the disc core contour is usually round - except for the recesses - but can also have a polygonal shape in general.
- the abrasive ring is usually resin-bonded, most often formaldehyde-resin-bound - however, other resins such as polyesters, polyimides, polyurethanes, epoxies, rubber resins (e.g. SBR, SBN) and hybrid resins can also be used. Glass, carbon, kevlar and other threads, metal whiskers and wires are known as fillers, and corundum, spinels, zirconium and sintered corundum, carbides, nitrides such as cubic boron nitride and the like, as well as ceramic powder produced by sol / gel processes are known as the grinding material .
- the wheel core is made of metal, it is particularly advantageous to pretreat the wheel core in the application area of the grinding ring with a primer which serves as an adhesion promoter in order to increase the surface adhesion between the wheel core and grinding wheel in that vulcanization occurs when the grinding wheel is sintered. e.g. also the fabric inserts.
- the pane core is at least degreased in the contact area, preferably stripped or sanded, before the primer is applied.
- the primer is preferably based on phenolic resin (high molecular weight) with a metal oxide component and an organosilicate component and is particularly suitable for steel surfaces.
- Particularly suitable phenolic resins for the primer are phenol / formaldehyde resins with flow ranges from 20 to 100 mm, in particular with hexamethylene tetramine content (4 to 12%).
- the phenol / formaldehyde resins can also be modified, for example epoxy, be phthalate, styrene, rubber or sulfur modified.
- Amide and imide resins as well as combinations with ABS, polystyrene and polyester are also suitable.
- Heavy metal oxides are particularly suitable as metal oxides, in particular from the iron group and / or rare earth group.
- the primer can also contain finely divided fillers, such as silicates, carbonates, chlorides, eutectic salt mixtures, clays or sintered materials, as well as metal sulfides, especially of divalent and trivalent metals.
- finely divided fillers such as silicates, carbonates, chlorides, eutectic salt mixtures, clays or sintered materials, as well as metal sulfides, especially of divalent and trivalent metals.
- the primer is applied in a conventional manner to the degreased metal surface, e.g. brushed on or sprayed on as a slurry in a solvent.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Die Erfindung betrifft eine Verbundschleifscheibe mit einem zentralen, gegebenenfalls gewellten oder gekröpften Scheibenkern mit randständigen Ausnehmungen zur Verankerung eines peripheren Schleifkranzes.The invention relates to a composite grinding wheel with a central, optionally corrugated or cranked wheel core with marginal recesses for anchoring a peripheral grinding ring.
Verbundschleifscheiben mit randständigen, etwa 2/3 eines Kreisbogens umfassenden Ausnehmungen im Scheibenkern zur Verankerung des aufgepreßten Schleifkranzes sind z.B. aus der DE-PS 606 001 seit jahrzehnten bekannt.Composite grinding wheels with marginal recesses in the wheel core, which comprise approximately 2/3 of a circular arc, for anchoring the pressed-on grinding ring are e.g. from DE-PS 606 001 known for decades.
Auf der anderen Seite ist ebensolange bekannt, Schleifscheibenkränze mit Gewebeeinlagen zu versehen, siehe z.B. die US-PS 2 092 591, wobei für derartige Gewebeeinlagen alle praktisch verfügbaren Gewebe, auch aus Metall, Glas oder Kunststoff, in Betracht kommen.On the other hand, it has been known for as long to provide grinding wheel rims with fabric inserts, see e.g. US Pat. No. 2,092,591, with all practically available fabrics, including those made of metal, glass or plastic, being considered for such fabric inserts.
Erfindungsgemäß wird nunmehr vorgeschlagen, Gewebeeinlagen am Scheibenkranz mit dem in den Ausnehmungen befindlichen Scheibenkranzmaterial zu verbinden.According to the invention, it is now proposed to connect fabric inserts on the disk rim with the disk rim material located in the recesses.
Demgemäß ist die erfindungsgemäße Verbundschleifscheibe des eingangs angeführten Typs vor allem dadurch gekennzeichnet, daß der Schleifkranz zumindest eine, vorzugsweise beidseitig des Scheibenkerns je eine, an sich bekannte Gewebeeinlage aufweist, sowie sich durch die Gewebeeinlage(n) hindurch erstreckende Verbinder zum Verbinden der Gewebeeinlage(n) mit dem in den Ausnehmungen befindlichen Schleifkranzmaterial vorgesehen sind.Accordingly, the composite grinding wheel of the type mentioned at the outset is characterized in particular by the fact that the grinding ring has at least one, preferably on both sides of the wheel core, a known fabric insert, and connectors extending through the fabric insert (s) for connecting the fabric insert (s) ) are provided with the grinding ring material located in the recesses.
Dabei können die Gewebeeinlagen mit einem oder mehreren Fäden miteinander vernadelt, also vernäht sein, oder z.B. Eindrückkörper vorgesehen sein, deren äußere Form vorzugsweise dem Profil der Ausnehmungen entspricht und die mindestens eine Gewebeeinlage sowie das in den Ausnehmungen befindliche Schleifkranzmaterial durchsetzen.The fabric inserts can be needled with one or more threads, that is sewn, or, for example, indentation bodies can be provided, the outer shape of which preferably corresponds to the profile of the recesses and the at least one fabric insert and the abrasive ring material located in the recesses penetrate.
Derartige Eindrückkörper sind z.B. in Form eines Nagelbretts ausgebildet, also als Scheibe mit Stiften.Such indenters are e.g. designed in the form of a nail board, i.e. as a disc with pins.
Als Nähmaterial werden Stahlfäden mit einem Durchmesser ≤0,5 mm, Kevlarfäden und Glasfäden, jeweils mit einem Durchmesser ≤1 mm bevorzugt, als Eindrückkörper Kämme aus Stahl und Nichteisenmetallen, temperatur(≥200°C)beständigen Kunststoffen oder Keramik, insbesondere durch Gießen oder Spritzformen hergestellte Körper.Steel threads with a diameter of ≤0.5 mm, Kevlar threads and glass threads, each with a diameter of ≤1 mm are preferred as sewing material, combs made of steel and non-ferrous metals, temperature (≥200 ° C) resistant plastics or ceramics, especially by casting or Injection molded bodies.
Die Herstellung der erfindungsgemäßen Verbundschleifscheibe erfolgt in üblicher Weise so, daß in einer Preßform zuerst eine Hälfte des Schleifkranzes als Ring aufgeschichtet, dann der Scheibenkern aufgesetzt wird, wobei die Ausnehmungen des Scheibenkerns mit Schleifkranzmaterial ausgefüllt werden, und dann die zweite Hälfte des Schleifkranzes aufgeschichtet wird. Anschließend wird im grünen Zustand vernadelt oder die Eindrückkörper werden eingedrückt, die Form wird geschlossen und der Schleifkranz unter Druck und Temperatur angesintert.The composite grinding wheel according to the invention is produced in a conventional manner so that first half of the grinding ring is layered in a press mold as a ring, then the wheel core is put on, the recesses in the wheel core being filled with grinding wheel material, and then the second half of the grinding wheel is piled up. Then, in the green state, the needles are pressed or the indentation bodies are pressed in, the mold is closed and the grinding ring is sintered under pressure and temperature.
Die erfindungsgemäßen Verbundschleifscheiben sind als rezyklierbare Scheiben konzipiert, bei denen der Scheibenkern immer wieder verwendbar ist. Dazu werden der Schleifkranzrest einseitig weggeschliffen, das in den Ausnehmungen befindliche Material hydraulisch herausgedrückt und Materialreste auf der anderen Seite entfernt.The composite grinding wheels according to the invention are designed as recyclable wheels in which the wheel core can be used again and again. For this purpose, the grinding ring remnant is ground away on one side, the material in the recesses is pressed out hydraulically and material remnants on the other side are removed.
Die Erfindung wird nachstehend anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher beschrieben, in der Fig. 1 ein Teilschnitt durch eine Verbundschleifscheibe mit rundem Scheibenkern, Fig. 2 entsprechende Teilschnitte zweier Varianten, Fig. 3 eine Detailstirnansicht auf den Randbereich des Scheibenkerns in Richtung Scheibenmitte, Fig. 4 eine Draufsicht gemäß Fig. 3, Fig. 5 eine Detailstirnansich auf den Randbereich des Scheibenkerns in Richtung Scheibenmitte einer Variante gemäß Fig. 3 und Fig. 6 eine Draufsicht gemäß Fig. 5 ist.The invention is described in more detail below on the basis of exemplary embodiments with reference to the drawing, in which FIG. 1 shows a partial section through a composite grinding wheel with a round wheel core, FIG. 2 shows corresponding partial sections of two variants, FIG. 3 shows a detailed front view of the edge area of the wheel core in the direction of the wheel center , FIG. 4 is a top view according to FIG. 3, FIG. 5 is a detailed front view of the edge region of the disk core in the direction of the center of the disk of a variant according to FIG. 3, and FIG. 6 is a top view according to FIG. 5.
In Fig. 1 erkennt man eine Verbundschleifscheibe mit einem Stahlkern mit Kröpfung 2 und Zentralnabe 3 und einem Schleifkranz 4, der in üblicher Weise harzgebundenes Schleifkorn enthält und eine zentrale Gewebeeinlage 5 aufweist, die im Bereich von randständigen Ausnehmungen 7 (siehe Fig. 4) des Scheibenkerns 1 bei 6 durch den Schleifkranz 4 hindurch vernäht ist.In Fig. 1 you can see a composite grinding wheel with a steel core with
Fig. 2 zeigt Varianten mit zwei Gewebeeinlagen und einer zur Scheibenperipherie zunehmenden Dicke des Schleifkranzes.FIG. 2 shows variants with two fabric inserts and a thickness of the grinding ring that increases towards the disk periphery.
Fig. 3 und 4 zeigen, daß der Scheibenkern 1 über seinen Umfang verteilte Ausnehmungen 7 gemäß der DE-PS 606 001 zur Verankerung des Schleifkranzes 4 am Scheibenkern 1 aufweist, die bei fertiger Verbundschleifscheibe mit Abrasivmaterial ausgefüllt sind. Im Bereich der Ausnehmungen 7 sind die beiden Gewebeeinlagen 5 mit der Naht 6 durch das grüne Schleifmaterial hindurch miteinander vernäht.3 and 4 show that the
Die Fig. 5 und 6 zeigen eine alternative Verankerungsweise ohne Vernähung. Gemäß Fig. 5 und 6 ist ein Eindrückkörper 8 in Form einer mit Stiften versehenen Scheibe vorgesehen, die der Form der Ausnehmung 7 entspricht und von einer Seite her eingesetzt wird, so daß die Stifte durch mindestens eine, vorzugsweise beide Gewebeeinlagen 5 und das dazwischen befindliche grüne Schleifmaterial in der Ausnehmung 7 hindurchtreten und die Bodenscheibe des Eindrückkörpers 8 an einer der Gewebeeinlagen anliegt.5 and 6 show an alternative way of anchoring without sewing. 5 and 6, an
Vorzugsweise ist der Scheibenkern aus Stahl oder einer Sonderlegierung oder aus hochfestem Kunststoff. Im Hinblick auf die Wiederverwendbarkeit ist Metallen und Kunststoffen der Vorzug gegenüber Keramikscheibenkernen zu geben, die üblicherweise bei Schlagbeanspruchung bruchanfälliger sind. Die Scheibenkernkontur ist üblicherweise - bis auf die Ausnehmungen - rund, kann aber auch allgemein Vieleckform haben.The disc core is preferably made of steel or a special alloy or of high-strength plastic. With regard to reusability, metals and plastics should be given preference over ceramic disc cores, which are usually more prone to breakage when subjected to impact. The disc core contour is usually round - except for the recesses - but can also have a polygonal shape in general.
Der Schleifkranz ist üblicherweise harzgebunden, am häufigsten formaldehydharzgebunden - es können jedoch auch andere Harze wie Polyester, Polyimide, Polyurethane, Epoxide, Kautschukharze (z.B. SBR, SBN) und Hybridharze eingesetzt werden. Als Füllstoffe sind Glas-, Karbon-, Kevlar- und andere Fäden, Metallwhiskers und Drähte bekannt, und als Schleifmaterial Korunde, Spinelle, Zirkon- und Sinterkorunde, Karbide, Nitride wie kubisches Bornitrid u.dgl., sowie nach Sol/Gelverfahren hergestellte Keramikpulver.The abrasive ring is usually resin-bonded, most often formaldehyde-resin-bound - however, other resins such as polyesters, polyimides, polyurethanes, epoxies, rubber resins (e.g. SBR, SBN) and hybrid resins can also be used. Glass, carbon, kevlar and other threads, metal whiskers and wires are known as fillers, and corundum, spinels, zirconium and sintered corundum, carbides, nitrides such as cubic boron nitride and the like, as well as ceramic powder produced by sol / gel processes are known as the grinding material .
Durch das erfindungsgemäße Verbinden der Gewebeeinlage(n) mit dem in den Ausnehmungen des Scheibenkerns vorhandenen Schleifkranzmaterial wird nach dem Sintern der Verbundschleifscheiben eine Elastizität im Verbindungsbereich erzielt, die geringere Stoß- und Schlagempfindlichkeit des Verbunds ergibt und somit höhere Scheibendrehzahlen erlaubt.By connecting the fabric insert (s) according to the invention to the abrasive ring material present in the recesses of the disc core, after sintering the composite grinding discs, an elasticity is achieved in the connection area, which results in lower shock and impact sensitivity of the composite and thus allows higher disc speeds.
Besteht der Scheibenkern, wie bevorzugt, aus Metall, ist besonders vorteilhaft, den Scheibenkern im Aufbringbereich des Schleifkranzes mit einem Primer vorzubehandeln, der als Haftvermittler dient, um die Flächenhaftung zwischen Scheibenkern und Schleifkranz dadurch zu erhöhen, daß beim Sintern des Schleifkranzes ein Anvulkanisieren auftritt, z.B. auch der Gewebeeinlagen. Dazu wird der Scheibenkern im Kontaktbereich zumindest entfettet, vorzugsweise abgebeizt oder angeschliffen, bevor der Primer aufgebracht wird. Der Primer ist vorzugsweise auf Phenolharzbasis (hochmolekular) mit einem Metalloxidanteil und einem Organosilikatanteil und eignet sich besonders für Stahloberflächen.If, as is preferred, the wheel core is made of metal, it is particularly advantageous to pretreat the wheel core in the application area of the grinding ring with a primer which serves as an adhesion promoter in order to increase the surface adhesion between the wheel core and grinding wheel in that vulcanization occurs when the grinding wheel is sintered. e.g. also the fabric inserts. For this purpose, the pane core is at least degreased in the contact area, preferably stripped or sanded, before the primer is applied. The primer is preferably based on phenolic resin (high molecular weight) with a metal oxide component and an organosilicate component and is particularly suitable for steel surfaces.
Als Phenolharze für den Primer eignen sich besonders Phenol/Formaldehydharze mit Fließstrecken von 20 bis 100 mm, insbesondere mit Hexamethylentetramingehalt (4 bis 12 %). Die Phenol/Formaldehydharze können auch modifiziert sein, z.B. epoxid-, phthalat-, styrol-, kautschuk- oder schwefelmodifiziert sein. Auch Amid- und Imidharze, sowie Kombinationen mit ABS, Polystyrol und Polyester sind geeignet.Particularly suitable phenolic resins for the primer are phenol / formaldehyde resins with flow ranges from 20 to 100 mm, in particular with hexamethylene tetramine content (4 to 12%). The phenol / formaldehyde resins can also be modified, for example epoxy, be phthalate, styrene, rubber or sulfur modified. Amide and imide resins as well as combinations with ABS, polystyrene and polyester are also suitable.
Als Metalloxide eignen sich vor allem Schwermetalloxide, insbesondere aus der Eisengruppe und/oder Seltenerdgruppe.Heavy metal oxides are particularly suitable as metal oxides, in particular from the iron group and / or rare earth group.
Der Primer kann auch feinteilige Füllstoffe enthalten, wie Silikate, Carbonate, Chloride, eutektische Salzmischungen, Tone oder Sintermaterialien, weiterhin Metallsulfide, vor allem von zwei- und dreiwertigen Metallen.The primer can also contain finely divided fillers, such as silicates, carbonates, chlorides, eutectic salt mixtures, clays or sintered materials, as well as metal sulfides, especially of divalent and trivalent metals.
Der Primer wird in üblicher Weise auf die entfettete Metalloberfläche aufgetragen, z.B. als Aufschlämmung in einem Lösungsmittel aufgestrichen, oder aufgesprüht.The primer is applied in a conventional manner to the degreased metal surface, e.g. brushed on or sprayed on as a slurry in a solvent.
Claims (7)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT566/95U | 1995-10-18 | ||
| AT56695U | 1995-10-18 | ||
| AT0056695U AT1003U1 (en) | 1995-10-18 | 1995-10-18 | COMPOSITE GRINDING DISC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0769352A1 true EP0769352A1 (en) | 1997-04-23 |
| EP0769352B1 EP0769352B1 (en) | 1999-12-15 |
Family
ID=3494010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96890165A Expired - Lifetime EP0769352B1 (en) | 1995-10-18 | 1996-10-17 | Laminated grinding disc |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0769352B1 (en) |
| AT (2) | AT1003U1 (en) |
| DE (1) | DE59603917D1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0909612A2 (en) * | 1997-10-16 | 1999-04-21 | August Rüggeberg GmbH & Co. | Grinding disc |
| WO2006042352A1 (en) | 2004-10-19 | 2006-04-27 | Gerhard Gissing | Cut-off wheel comprising a double core clamping device |
| DE102009056440A1 (en) * | 2009-12-02 | 2011-06-09 | Rhodius Schleifwerkzeuge Gmbh & Co. Kg | System for separating objects |
| EP2353784A2 (en) | 2010-02-10 | 2011-08-10 | Rappold Winterthur Technologie GmbH | Compound sanding system |
| EP2353783A2 (en) | 2010-01-20 | 2011-08-10 | Rappold Winterthur Technologie GmbH | Joint grinding system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE606001C (en) | 1932-07-19 | 1934-11-23 | Emil Motl | Cutting and grinding disc with a disc-shaped carrier made of metal |
| US1989074A (en) * | 1931-07-23 | 1935-01-29 | George H Bullard | Abrasive wheel |
| US2092591A (en) | 1935-08-17 | 1937-09-07 | Norton Co | Grinding wheel |
| US2694886A (en) * | 1952-07-12 | 1954-11-23 | Allison Company | Abrasive cutting wheel |
| US3793783A (en) * | 1972-10-02 | 1974-02-26 | Norton Co | Segmental cut-off grinding wheel |
| US5014678A (en) * | 1989-03-10 | 1991-05-14 | Sanwa Diamond Industrial Co., Ltd. | Cutter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH501468A (en) * | 1968-11-19 | 1971-01-15 | Esterol Ag | Composite element for abrasives |
-
1995
- 1995-10-18 AT AT0056695U patent/AT1003U1/en not_active IP Right Cessation
-
1996
- 1996-10-17 EP EP96890165A patent/EP0769352B1/en not_active Expired - Lifetime
- 1996-10-17 DE DE59603917T patent/DE59603917D1/en not_active Expired - Lifetime
- 1996-10-17 AT AT96890165T patent/ATE187669T1/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1989074A (en) * | 1931-07-23 | 1935-01-29 | George H Bullard | Abrasive wheel |
| DE606001C (en) | 1932-07-19 | 1934-11-23 | Emil Motl | Cutting and grinding disc with a disc-shaped carrier made of metal |
| US2092591A (en) | 1935-08-17 | 1937-09-07 | Norton Co | Grinding wheel |
| US2694886A (en) * | 1952-07-12 | 1954-11-23 | Allison Company | Abrasive cutting wheel |
| US3793783A (en) * | 1972-10-02 | 1974-02-26 | Norton Co | Segmental cut-off grinding wheel |
| US5014678A (en) * | 1989-03-10 | 1991-05-14 | Sanwa Diamond Industrial Co., Ltd. | Cutter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0909612A2 (en) * | 1997-10-16 | 1999-04-21 | August Rüggeberg GmbH & Co. | Grinding disc |
| EP0909612A3 (en) * | 1997-10-16 | 2001-01-31 | August Rüggeberg GmbH & Co. | Grinding disc |
| WO2006042352A1 (en) | 2004-10-19 | 2006-04-27 | Gerhard Gissing | Cut-off wheel comprising a double core clamping device |
| US8113920B2 (en) | 2004-10-19 | 2012-02-14 | Gerhard Gissing | Cut-off wheel comprising a double core clamping device |
| DE102009056440A1 (en) * | 2009-12-02 | 2011-06-09 | Rhodius Schleifwerkzeuge Gmbh & Co. Kg | System for separating objects |
| EP2353783A2 (en) | 2010-01-20 | 2011-08-10 | Rappold Winterthur Technologie GmbH | Joint grinding system |
| EP2353784A2 (en) | 2010-02-10 | 2011-08-10 | Rappold Winterthur Technologie GmbH | Compound sanding system |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE187669T1 (en) | 2000-01-15 |
| AT1003U1 (en) | 1996-09-25 |
| DE59603917D1 (en) | 2000-01-20 |
| EP0769352B1 (en) | 1999-12-15 |
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Legal Events
| Date | Code | Title | Description |
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