EP1812206B1 - Cut-off wheel comprising a double core clamping device - Google Patents

Cut-off wheel comprising a double core clamping device Download PDF

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Publication number
EP1812206B1
EP1812206B1 EP05794457.1A EP05794457A EP1812206B1 EP 1812206 B1 EP1812206 B1 EP 1812206B1 EP 05794457 A EP05794457 A EP 05794457A EP 1812206 B1 EP1812206 B1 EP 1812206B1
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Prior art keywords
parting
grinding ring
clamping plates
recesses
constituted
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EP05794457.1A
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German (de)
French (fr)
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EP1812206A1 (en
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Gerhard Gissing
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16—Bushings; Mountings
    • 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 present invention relates to a system of a sanding Trennschleifringes according to the preamble of claim 1.
  • Resin-bonded cut-off wheels with a diameter ⁇ 400 mm are used on stationary separation plants in the metal-producing and metalworking industry for cutting steel, cast iron, special alloys, Inconell, titanium, etc.
  • a major disadvantage is the generally low exploitation of conventional cutting discs. Depending on existing machines and large material dimensions, these homogeneous cutting discs can ideally be used up to a minimum of 45% of the new diameter, but on average only up to 60% of the original diameter.
  • a Trennschleifring is disclosed which is formed to a central bore out with a full-scale taper.
  • the rejuvenation steel plates are glued in place for reinforcement, so that the glued steel plates cover the tapered area.
  • the object of the present invention is therefore to provide a composite system which excludes the aforementioned disadvantages and allows the user to use up the outer Trennschleifringes of up to 95% of the entire abrasive separating ring surface and ensures additional benefits such as reduced blade width with even higher stability.
  • An essential part of the invention are the two clamping plates, which are to be understood as connecting elements between the actual machine-side clamping flanges and the abrasive separating ring. Since especially the transition from the clamping flange to the cutting disc in conventional products is a weak point, this disadvantage is significantly improved according to the invention by the alternatively possible material of the clamping panels here.
  • the abrasive cut-off ring 1 shown in the figures is a resin-bonded cut-off wheel without, but preferably with additional fabric reinforcement 5.
  • additional fabric reinforcement 5 Through a targeted selection of phenolic resins in combination with coordinated abrasive grains and fillers, the different degrees of hardness are adapted to the particular application requirements and customer requirements.
  • the abrasives used are preferably corundum, but in particular special, zirconium and sintered corundum as well as silicon carbide.
  • the fillers are composed of raw materials such as pyrite, zinc sulfide, graphite, potassium chlorananganate, etc., which are currently used in cutting discs for industrial applications.
  • the outer diameter D of the Trennschleifringes 1 is usually between 400 mm and 2000 mm, but preferably greater than 800 mm.
  • the bore diameter d of the separating slip ring 1 can ideally be adjusted to the application-specific minimum diameter. For manufacturing reasons, however, a fixed bore, based on the respective standard size of the separating ring should be selected. As a guideline for the bore diameter d, the range 40 to 80% of the outer diameter D is given.
  • the ratio of the diameter D to the width T is currently usually in the range 80 to 100.
  • An increase according to the invention to up to 130 is feasible due to the much stiffer core zone.
  • the abrasive separating ring can be both plane-parallel and conical, that is tapered to the bore executed.
  • the separating slip ring 1 has on the plan side in the bore area on both sides of several geometric depressions 3, in which the two clamping plates 2 are inserted accurately when clamping.
  • the shape of these recesses 3 may be round, rectangular, but preferably dovetailed.
  • the depth of these recesses must be between 0.1 mm and 1 mm, preferably 0.2 mm to 0.6 mm less than half the separating ring width T in the bore.
  • the radial extent e of these recesses 3 is dependent on the outer diameter D and is between 10 mm and 200 mm, preferably between 30 mm and 60 mm.
  • An essential component of this system are the two clamping plates 2, which fit with their defined edge shape exactly in the two-sided depressions 3 of the Trennschleifringes 1.
  • the two clamping plates When clamping with the conventional clamping bottles 4a and 4b, the two clamping plates are pressed together and it is thereby produced the necessary lateral clamping force.
  • the necessary forces for a Zerliqueslui be forwarded from the drive shaft via the clamping flanges 4a, 4b on the two clamping plates 2 and transmitted from these ultimately non-positively on the abrasive abrasive ring separating ring on the special edge shape.
  • the clamping panels 2 can be designed in straight, cranked, perforated or in corrugated form. As a way of saving weight, the clamping panels 2 can be provided with additional recesses.
  • edge shape of these two clamping plates 2 is characterized by a plurality of symmetrical round, angular, dovetailed or similarly shaped protruding clamping surfaces, which must fit exactly in the co-impressed depressions 3 of the abrasive separating ring and so can transmit the forces occurring during the cut-off.
  • the total thickness of the two clamping plates 2 must be slightly, that is about 5 to 10% thinner than the thickness of the disc in the bore region of the separating slip ring. 1 This ensures that the necessary free cutting depth is achieved as with conventional cutting discs.
  • these clamping panels 2 are high-strength reinforced plastics, carbon fiber, non-ferrous metals, special alloys, titanium, but preferably currently simple steel sheets for use. In addition to the required basic strength, this material must have a certain degree of flexibility and high residual stress as an important criterion in order to be able to withstand the lateral force effects occurring in such applications without permanent damage.
  • slits 2a are provided in the clamping panels, in which special tension springs are inserted as Aufspann Vietnamese.
  • additional screw connections 2b in the outer diameter region of the tension plates 2 can be provided for very large tension plates (> 60% of the separating ring outer diameter). In this case, no screwing over the flat surfaces of the clamping panels 2 may protrude.
  • a position and shape-accurate press-fitting of the recesses 3 in the bore region of the separating slip ring 1 is necessary. This is achieved by compressing a precisely fitting template. Alternatively, these recesses can also be subsequently ground on a suitable processing plant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Die vorliegende Erfindung betrifft ein System eines schleifaktiven Trennschleifringes gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a system of a sanding Trennschleifringes according to the preamble of claim 1.

Kunstharzgebundene Trennschleifscheiben ab einem Durchmesser ≥ 400 mm werden auf stationären Trennanlagen in der metallerzeugenden sowie metallverarbeitenden Industrie zum Ablängen von Stahl, Guß, Sonderlegierungen, Inconell, Titan usw. eingesetzt.Resin-bonded cut-off wheels with a diameter ≥ 400 mm are used on stationary separation plants in the metal-producing and metalworking industry for cutting steel, cast iron, special alloys, Inconell, titanium, etc.

Als großer Nachteil erweist sich dabei die generell geringe Ausnutzbarkeit der herkömmlichen Trennscheiben. In Abhängigkeit vorhandener Maschinen sowie großer Materialabmessungen können diese homogenen Trennscheiben im Idealfall bis minimal 45 % des Neudurchmessers, im Mittelwert jedoch nur bis auf 60 % des Ausgangsdurchmessers aufgebraucht werden.A major disadvantage is the generally low exploitation of conventional cutting discs. Depending on existing machines and large material dimensions, these homogeneous cutting discs can ideally be used up to a minimum of 45% of the new diameter, but on average only up to 60% of the original diameter.

Diese verbleibenden Restscheiben müssen sodann nach den jeweiligen nationalen Entsorgungsrichtlinien kostspielig entsorgt werden. Als weiterer Nachteil ist der zusätzliche Rohstoffeinsatz für diese ungebrauchte Kernzone anzuführen, welcher trotz alternativer Schleifkornmaterialien hinsichtlich Armierung und Harzanteil zusätzliche Kosten am Rohstoffsektor ergibt.These remaining washers then have to be disposed of costly according to the respective national disposal guidelines. Another disadvantage is the additional use of raw materials for this unused core zone, which results in additional costs in the raw materials sector despite alternative abrasive grain materials in terms of reinforcement and resin content.

In der EP 0 832 720 A2 wird auf einem metallischen Grundkörper ein kunstharzgebundener gewebeverstärkter Trennschleifring mittels einer kraftschlüssigen Verklebung beschrieben. Dieses System konnte sich jedoch nicht durchsetzen, da auf dem verbleibenden Grundkörper immer noch ein kleiner Restbelag der schleifaktiven Randzone verbleibt, wodurch die Entsorgungsnotwendigkeit eines Metallkernes mit einem kunstharzgebundenen Restbelag immer noch gegeben ist.In the EP 0 832 720 A2 On a metallic base body, a resin-bonded fabric-reinforced abrasive cut ring is described by means of a non-positive bond. However, this system could not prevail, as still remains on the remaining body remains a small residual coating of the abrasive boundary zone, whereby the Entsorgungsnotwendigkeit a metal core with a resin-bonded residual coating is still given.

Ein weiterer Lösungsweg wird in der EP 0 769 352 A1 beschrieben, wo auf einem metallischen Grundkörper direkt bei der Herstellung die schleifaktive Randzone kraftschlüssig verpresst wird. Als Nachteil hat sich hier die kostspielige Anschaffung einer großen Anzahl dieser Grundkörper herausgestellt. Zusätzlich kommt hier noch ein logistisches Problem bezüglich Retournierung der aufgebrauchten Verbundtrennscheibe hinzu, welche zur Neubelegung ins Herstellerwerk zurückgeschickt werden muss. Aus Kostengründen ist dieses System nur in begrenzter Entfernung zum Hersteller einsetzbar. Zusätzlich ist die Reinigung und Neubelegung mit einem größeren technischen Aufwand und letztendlich wiederum Zeit sowie einem Kostenfaktor verbunden.Another solution is in the EP 0 769 352 A1 described, where directly on the production of a metallic base body, the abrasive-active edge zone is pressed non-positively. The disadvantage here has been the costly purchase of a large number of these bodies turned out. In addition, there is also a logistical problem regarding the return of used-up composite cutting disc, which must be returned to the manufacturer for re-allocation. For cost reasons, this system can only be used at a limited distance to the manufacturer. In addition, the cleaning and replacement is associated with a greater technical effort and ultimately in turn time and a cost factor.

In der EP 1 332 834 A1 ist ein Trennschleifring offenbart, der zu einer zentralen Bohrung hin mit einer vollumfänglich verlaufenden Verjüngung ausgebildet ist. Im Bereich der Verjüngung werden Stahlplatten zur Verstärkung eingeklebt, sodass die eingeklebten Stahlplatten den verjüngten Bereich überdecken.In the EP 1 332 834 A1 a Trennschleifring is disclosed which is formed to a central bore out with a full-scale taper. In the area of the rejuvenation steel plates are glued in place for reinforcement, so that the glued steel plates cover the tapered area.

Aufgabe der vorliegenden Erfindung ist es daher, ein Verbundsystem zu schaffen, das vorgenannte Nachteile ausschließt und dem Anwender ein Aufbrauchen des äußeren Trennschleifringes von bis zu 95 % der gesamten schleifaktiven Trennringfläche ermöglicht und zusätzliche Vorteile wie reduzierte Trennscheibenbreite bei sogar höherer Stabilität gewährleistet.The object of the present invention is therefore to provide a composite system which excludes the aforementioned disadvantages and allows the user to use up the outer Trennschleifringes of up to 95% of the entire abrasive separating ring surface and ensures additional benefits such as reduced blade width with even higher stability.

Dies wird erfindungsgemäß nach Anspruch 1 dadurch erreicht, dass der Bohrungsdurchmesser des Trennschleifringes auf den minimalen Aufbrauchdurchmesser abgestimmt wird und zusätzlich hier beidseitig versetzte Vertiefungen für die Randform der beiden Spanntafeln eingepresst sind. Dadurch ist ein fast vollständiges Aufbrauchen der schleifaktiven Randzone möglich und es muss nur mehr ein kleiner abrasiver Restring entsorgt werden.This is inventively achieved according to claim 1, characterized in that the bore diameter of the Trennschleifringes is tuned to the minimum Aufbrauchdurchmesser and additionally here both sides offset depressions for the edge shape of the two clamping plates are pressed. As a result, almost complete exhaustion of the abrasive edge zone is possible and only a small abrasive residual ring needs to be disposed of.

Ein wesentlicher Bestandteil der Erfindung sind die beiden Spanntafeln, welche als Verbindungselemente zwischen den eigentlichen maschinenseitigen Spannflanschen und dem schleifaktiven Trennring zu verstehen sind. Da speziell der Übergang vom Spannflansch zur Trennscheibe bei herkömmlichen Produkten eine Schwachstelle darstellt, wird hier erfindungsgemäß dieser Nachteil durch den alternativ möglichen Werkstoff der Spanntafeln wesentlich verbessert.An essential part of the invention are the two clamping plates, which are to be understood as connecting elements between the actual machine-side clamping flanges and the abrasive separating ring. Since especially the transition from the clamping flange to the cutting disc in conventional products is a weak point, this disadvantage is significantly improved according to the invention by the alternatively possible material of the clamping panels here.

Da die beiden Spanntafeln beim Anwender verbleiben, muss nur noch der wesentlich leichtere Trennring zum Kunden versandt werden; dabei ist eine Gewichtseinsparung von bis zu 40 % möglich.Since the two clamping panels remain with the user, only the much lighter separating ring has to be sent to the customer; a weight saving of up to 40% is possible.

Weitere Merkmale und Details der vorliegenden Erfindung sind aus der nachfolgenden Figurenbeschreibung zu entnehmen. Dabei zeigen:

Fig. 1
eine Explosionsdarstellung eines erfindungsgemäßen Trennschleifringes mit doppelten Spanntafeln;
Fig. 2
einen Schnitt durch dieses Verbundsystem entlang der Linie A-A in Fig. 3 und
Fig. 3
eine Seitenansicht dieses Trennring-Verbundsystems.
Further features and details of the present invention can be taken from the following description of the figures. Showing:
Fig. 1
an exploded view of a Trennschleifringes invention with double clamping panels;
Fig. 2
a section through this composite system along the line AA in Fig. 3 and
Fig. 3
a side view of this separating ring composite system.

Bei den in den Figuren dargestellten Trennschleifring 1 handelt es sich um eine kunstharzgebundene Trennschleifscheibe ohne, vorzugsweise aber mit zusätzlicher Gewebeverstärkung 5. Durch eine gezielte Auswahl von Phenolharzen in Kombination mit abgestimmten Schleifkörnungen und Füllstoffen werden die verschiedenen Härtegrade den jeweiligen Anwendungserfordernissen und Kundenwünschen angepasst.The abrasive cut-off ring 1 shown in the figures is a resin-bonded cut-off wheel without, but preferably with additional fabric reinforcement 5. Through a targeted selection of phenolic resins in combination with coordinated abrasive grains and fillers, the different degrees of hardness are adapted to the particular application requirements and customer requirements.

Als Schleifmittel werden bevorzugt Korunde, im Speziellen jedoch Spezial-, Zirkon- und Sinterkorunde sowie auch Siliciumkarbid verwendet. Die Füllstoffe setzen sich aus Rohstoffen wie Pyrit, Zinksulfid, Grafit, Kaliumchlormanganat usw. zusammen, welche auch derzeit in Trennscheiben für Industrieanwendungen eingesetzt werden.The abrasives used are preferably corundum, but in particular special, zirconium and sintered corundum as well as silicon carbide. The fillers are composed of raw materials such as pyrite, zinc sulfide, graphite, potassium chlorananganate, etc., which are currently used in cutting discs for industrial applications.

Als Gewebeverstärkung 5 kommen derzeit Glasgewebeeinlagen zur Anwendung, in Zukunft sind hier jedoch auch Alternativen wie Kevlar oder Kohlefaser denkbar. Eine Ausführung ohne durchgehende Armierung ist möglich, im Bereich von Vertiefungen 3 sollten jedoch Verstärkungen vorgesehen werden.Glass fabric inserts are currently used as fabric reinforcement 5, but alternatives such as Kevlar or carbon fiber are also conceivable in the future. An embodiment without continuous reinforcement is possible, but reinforcements should be provided in the region of recesses 3.

Der Außendurchmesser D des Trennschleifringes 1 liegt üblicherweise zwischen 400 mm und 2000 mm, bevorzugt jedoch größer 800 mm. Der Bohrungsdurchmesser d vom Trennschleifring 1 kann idealerweise auf den anwendungsbezogenen Minimaldurchmesser abgestimmt werden. Aus fertigungstechnischen Gründen sollte jedoch eine Fixbohrung, bezogen auf die jeweilige Standardabmessung des Trennringes, gewählt werden. Als Richtwert für den Bohrungsdurchmesser d ist der Bereich 40 bis 80 % vom Außendurchmesser D anzugeben.The outer diameter D of the Trennschleifringes 1 is usually between 400 mm and 2000 mm, but preferably greater than 800 mm. The bore diameter d of the separating slip ring 1 can ideally be adjusted to the application-specific minimum diameter. For manufacturing reasons, however, a fixed bore, based on the respective standard size of the separating ring should be selected. As a guideline for the bore diameter d, the range 40 to 80% of the outer diameter D is given.

Die Verhältniszahl vom Durchmesser D zur Breite T liegt derzeit üblicherweise im Bereich 80 bis 100. Eine erfindungsgemäße Steigerung auf bis zu 130 ist auf Grund der wesentlich steiferen Kernzone realisierbar. Der schleifaktive Trennring kann sowohl planparallel als auch konisch, das heißt zur Bohrung verjüngt, ausgeführt sein.The ratio of the diameter D to the width T is currently usually in the range 80 to 100. An increase according to the invention to up to 130 is feasible due to the much stiffer core zone. The abrasive separating ring can be both plane-parallel and conical, that is tapered to the bore executed.

Aus Gründen der Übersichtlichkeit ist die Breite T in den Fig. 1 und 2 im Verhältnis zum Durchmesser D um ein Vielfaches zu groß gezeichnet.For the sake of clarity, the width T in the Fig. 1 and 2 drawn in relation to the diameter D many times too large.

Der Trennschleifring 1 weist planseitig im Bohrungsbereich beidseitig mehrere geometrische Vertiefungen 3 auf, in welche beim Aufspannen die beiden Spanntafeln 2 passgenau eingelegt werden. Die Form dieser Vertiefungen 3 kann rund, rechteckig, vorzugsweise jedoch schwalbenschwanzförmig ausgeführt sein. Um eine gute Vorspannung der Spanntafeln 2 zu ermöglichen, muss die Tiefe dieser Ausnehmungen zwischen 0,1 mm und 1 mm vorzugsweise 0,2 mm bis 0,6 mm geringer sein, als die halbe Trennringbreite T in der Bohrung. Die radiale Erstreckung e dieser Ausnehmungen 3 ist abhängig vom Außendurchmesser D und liegt zwischen 10 mm und 200 mm, vorzugsweise zwischen 30 mm und 60 mm.The separating slip ring 1 has on the plan side in the bore area on both sides of several geometric depressions 3, in which the two clamping plates 2 are inserted accurately when clamping. The shape of these recesses 3 may be round, rectangular, but preferably dovetailed. In order to allow a good bias of the tension plates 2, the depth of these recesses must be between 0.1 mm and 1 mm, preferably 0.2 mm to 0.6 mm less than half the separating ring width T in the bore. The radial extent e of these recesses 3 is dependent on the outer diameter D and is between 10 mm and 200 mm, preferably between 30 mm and 60 mm.

Ein wesentlicher Bestandteil dieses Systems sind die beiden Spanntafeln 2, welche mit ihrer definierten Randform genau in die beidseitigen Vertiefungen 3 des Trennschleifringes 1 passen. Beim Aufspannen mit den herkömmlichen Spannflaschen 4a und 4b werden die beiden Spannbleche zusammengepresst und es wird dadurch die notwendige seitliche Spannkraft erzeugt. Die für einen Zerspannungsprozess notwendigen Kräfte werden dabei von der Antriebswelle über die Spannflansche 4a, 4b auf die beiden Spanntafeln 2 weitergeleitet und von diesen letztendlich über die spezielle Randform auf den schleifaktiven abrasiven Trennring kraftschlüssig übertragen.An essential component of this system are the two clamping plates 2, which fit with their defined edge shape exactly in the two-sided depressions 3 of the Trennschleifringes 1. When clamping with the conventional clamping bottles 4a and 4b, the two clamping plates are pressed together and it is thereby produced the necessary lateral clamping force. The necessary forces for a Zerspannungsprozess be forwarded from the drive shaft via the clamping flanges 4a, 4b on the two clamping plates 2 and transmitted from these ultimately non-positively on the abrasive abrasive ring separating ring on the special edge shape.

Die Spanntafeln 2 können in gerader, gekröpfter, perforierter bzw. auch in gewellter Form ausgeführt sein. Als Möglichkeit der Gewichtseinsparung können die Spanntafeln 2 mit zusätzlichen Ausnehmungen versehen werden.The clamping panels 2 can be designed in straight, cranked, perforated or in corrugated form. As a way of saving weight, the clamping panels 2 can be provided with additional recesses.

Die Randform dieser beiden Spanntafeln 2 zeichnet sich durch mehrere symmetrische runde, eckige, schwalbenschwanzförmige oder ähnlich geformte vorstehenden Spannflächen aus, welche genau in die beidseitig mitgepressten Vertiefungen 3 des schleifaktiven Trennringes passen müssen und so die auftretenden Kräfte während des Trennschleifens übertragen können.The edge shape of these two clamping plates 2 is characterized by a plurality of symmetrical round, angular, dovetailed or similarly shaped protruding clamping surfaces, which must fit exactly in the co-impressed depressions 3 of the abrasive separating ring and so can transmit the forces occurring during the cut-off.

Die Gesamtstärke der beiden Spanntafeln 2 muss geringfügig, das heißt ungefähr 5 bis 10 % dünner sein als die Scheibenstärke im Bohrungsbereich des Trennschleifringes 1. Dadurch ist es gewährleistet, dass die notwendige freie Schnitttiefe wie mit herkömmlichen Trennscheiben erreicht wird.The total thickness of the two clamping plates 2 must be slightly, that is about 5 to 10% thinner than the thickness of the disc in the bore region of the separating slip ring. 1 This ensures that the necessary free cutting depth is achieved as with conventional cutting discs.

Als Werkstoff für diese Spanntafeln 2 kommen hochfeste armierte Kunststoffe, Kohlenstoffaser, Nichteisenmetalle, Sonderlegierungen, Titan, vorzugsweise jedoch derzeit einfache Stahlbleche zur Anwendung. Zusätzlich zur erforderlichen Grundfestigkeit, muss dieser Werkstoff als wichtiges Kriterium eine gewisse Flexibilität und hohe Eigenspannung aufweisen, um die bei solchen Anwendungen auftretenden seitlichen Krafteinwirkungen ohne dauernden Schaden überstehen zu können.As a material for these clamping panels 2 are high-strength reinforced plastics, carbon fiber, non-ferrous metals, special alloys, titanium, but preferably currently simple steel sheets for use. In addition to the required basic strength, this material must have a certain degree of flexibility and high residual stress as an important criterion in order to be able to withstand the lateral force effects occurring in such applications without permanent damage.

Um das Handling beim Aufspannen dieses Verbundsystems zu erleichtern, werden in den Spanntafeln Schlitze 2a vorgesehen, in welche spezielle Spannfedern als Aufspannhilfe eingeschoben werden. Als zusätzliche Fixierung bzw. Spannkrafterhöhung können bei sehr großen Spanntafeln (> 60 % vom Trennring-Außendurchmesser) zusätzliche Verschraubungen 2b im äußeren Durchmesserbereich der Spanntafeln 2 vorgesehen werden. Dabei dürfen keine Verschraubungselemente über die Planflächen der Spanntafeln 2 vorstehen.In order to facilitate handling when mounting this composite system, slits 2a are provided in the clamping panels, in which special tension springs are inserted as Aufspannhilfe. As an additional fixation or tension force increase, additional screw connections 2b in the outer diameter region of the tension plates 2 can be provided for very large tension plates (> 60% of the separating ring outer diameter). In this case, no screwing over the flat surfaces of the clamping panels 2 may protrude.

Als wichtige Fertigungsmaßnahme ist ein positions- und formgenaues Einpressen der Vertiefungen 3 im Bohrungsbereich des Trennschleifringes 1 notwendig. Dies wird durch das Mitpressen einer passgenauen Schablone erreicht. Alternativ können diese Ausnehmungen auch nachträglich auf einer geeigneten Bearbeitungsanlage ausgeschliffen werden.As an important production measure, a position and shape-accurate press-fitting of the recesses 3 in the bore region of the separating slip ring 1 is necessary. This is achieved by compressing a precisely fitting template. Alternatively, these recesses can also be subsequently ground on a suitable processing plant.

Claims (21)

  1. A system of an abrasively active parting-off grinding ring (1) with a diameter (D) of 400 mm or more comprising a mixture of abrasive grain, binder and, if required, fillers with two clamping plates (2), which are to be understood as connecting elements between the actual machine-side clamping flanges and the abrasively active parting-off ring, by means of which clamping plates (2) the parting-off grinding ring (1) can be clamped, characterised in that an opening (d) of the parting-off grinding ring (1) extends up to the outer edge of the two clamping plates (2) and a connection of the clamping plates (2) with the parting-off grinding ring (1) takes place solely by means of clamping force and matching of the two clamping plates (2).
  2. The system according to claim 1, wherein the parting-off grinding ring (1) comprises recesses (3) on both lateral faces in the region of its opening (d) and the clamping plates (2) have an edge shape which can be fitted into the opening (d) and recesses (3).
  3. The system according to claim 2, wherein the recesses (3) on one lateral face are offset with respect to the recesses (3) on the other lateral face.
  4. The system according to claim 2 or 3, characterised in that the recesses (3) are jointly pressed during the pressing of the parting-off grinding ring (1) or are subsequently ground into the latter.
  5. The system according to any one of claims 1 to 4, characterised in that the parting-off grinding ring (1) is constituted with plane-parallel lateral faces.
  6. The system according to any one of claims 1 to 4, characterised in that the parting-off grinding ring (1) is constituted conically tapered towards the opening (d).
  7. The system according to claim 6, characterised in that the parting-off grinding ring (1) is constituted conically tapered towards the opening (d) up to 3 mm.
  8. The system according to any one of claims 1 to 7, characterised in that the ratio of the diameter (D) of the parting-off grinding ring (1) to the width (T) amounts to more than 70, preferably more than 90.
  9. The system according to any one of claims 1 to 8, characterised in that the opening (d) is greater than 40% of the diameter (D).
  10. The system according to claim 1, characterised in that the parting-off grinding ring (1) is present in a synthetic resin-bonded embodiment.
  11. The system according to any one of claims 1 to 10, characterised in that the parting-off grinding ring (1) is constituted with reinforcements in the region of the recesses (3).
  12. The system according to claim 11, characterised in that the reinforcements comprise carbon fibre or Kevlar.
  13. The system according to any one of claims 1 to 12, characterised in that the parting-off grinding ring (1) comprises at least one, preferably two or more fabric inserts.
  14. The system according to any one of claims 1 to 13, characterised in that the clamping plates (2) are constituted in a straight or cranked form.
  15. The system according to any one of claims 1 to 14, characterised in that the clamping plates (2) are constituted in a corrugated or perforated form.
  16. The system according to any one of claims 1 to 15, characterised in that the clamping plates (2) are constituted by materials such as carbon fibres, high-strength reinforced plastics, nonferrous metals, special alloys, titanium, but preferably by a metal plate.
  17. The system according to any one of claims 1 to 16, characterised in that a total width (b) of the two clamping plates (2) is 1% to 20%, preferably 5% to 10%, thinner than the width of the parting-off grinding ring (1) in the region of the opening (d).
  18. The system according to any one of claims 1 to 17, characterised in that a damping film is inserted or glued between the clamping plates (2).
  19. The system according to any one of claims 1 to 18, characterised at that slots (2a) and/or additional holes (2b) are provided in the clamping plates (2).
  20. A method for producing a system of a parting-off grinding ring (1) with two clamping plates (2) as connecting elements according to any one of claims 1 to 19, wherein the parting-off grinding ring (1) is constituted with recesses (3) in the region of its opening (d) on the two lateral faces, said recesses already being jointly pressed by means of templates during the pressing of the parting-off grinding ring (1) or alternatively being subsequently ground in, and wherein the connecting elements or clamping plates (2) are constituted with an edge shape which can be fitted into the opening (d) and recesses (3).
  21. The method according to claim 20, wherein the recesses (3) on one lateral face are offset with respect to the recesses (3) on the other lateral face.
EP05794457.1A 2004-10-19 2005-10-18 Cut-off wheel comprising a double core clamping device Not-in-force EP1812206B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0174904A AT502285B1 (en) 2004-10-19 2004-10-19 CIRCUIT RING WITH DOUBLE BOLTING DEVICE
PCT/AT2005/000413 WO2006042352A1 (en) 2004-10-19 2005-10-18 Cut-off wheel comprising a double core clamping device

Publications (2)

Publication Number Publication Date
EP1812206A1 EP1812206A1 (en) 2007-08-01
EP1812206B1 true EP1812206B1 (en) 2014-05-14

Family

ID=35501572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05794457.1A Not-in-force EP1812206B1 (en) 2004-10-19 2005-10-18 Cut-off wheel comprising a double core clamping device

Country Status (14)

Country Link
US (1) US8113920B2 (en)
EP (1) EP1812206B1 (en)
JP (1) JP4571192B2 (en)
KR (1) KR100879394B1 (en)
CN (1) CN101043978B (en)
AT (1) AT502285B1 (en)
BR (1) BRPI0517078A (en)
CA (1) CA2580972C (en)
EG (1) EG25574A (en)
MX (1) MX2007004322A (en)
RU (1) RU2366563C2 (en)
UA (1) UA88650C2 (en)
WO (1) WO2006042352A1 (en)
ZA (1) ZA200703143B (en)

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Also Published As

Publication number Publication date
AT502285A1 (en) 2007-02-15
UA88650C2 (en) 2009-11-10
US20070232212A1 (en) 2007-10-04
BRPI0517078A (en) 2008-09-30
JP2008515652A (en) 2008-05-15
ZA200703143B (en) 2008-10-29
KR20070070229A (en) 2007-07-03
AT502285B1 (en) 2008-12-15
MX2007004322A (en) 2007-05-04
CN101043978B (en) 2010-10-27
JP4571192B2 (en) 2010-10-27
RU2366563C2 (en) 2009-09-10
EP1812206A1 (en) 2007-08-01
CN101043978A (en) 2007-09-26
EG25574A (en) 2012-03-07
KR100879394B1 (en) 2009-01-20
CA2580972C (en) 2011-04-26
RU2007118639A (en) 2008-11-27
CA2580972A1 (en) 2006-04-27
US8113920B2 (en) 2012-02-14
WO2006042352A1 (en) 2006-04-27

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