EP0236877B1 - Abrasive body bonded by a synthetic resin - Google Patents
Abrasive body bonded by a synthetic resin Download PDFInfo
- Publication number
- EP0236877B1 EP0236877B1 EP87102800A EP87102800A EP0236877B1 EP 0236877 B1 EP0236877 B1 EP 0236877B1 EP 87102800 A EP87102800 A EP 87102800A EP 87102800 A EP87102800 A EP 87102800A EP 0236877 B1 EP0236877 B1 EP 0236877B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- synthetic resin
- abrasive body
- radius
- body bonded
- recess
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/16—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
- B24D5/16—Bushings; Mountings
Definitions
- the invention relates to a resin-bonded grinding wheel with improved wet strength in some areas, which is provided for clamping with at least one bore and, if necessary, recesses for receiving clamping flanges on the end face of the body.
- Resin-bonded grinding wheels have been used successfully for a long time. Ceramic-bonded grinding wheels are also known, which are impregnated throughout to improve their strength. The related impregnation agents clog the pores in the body and thereby change the grinding properties to the negative, because the closed pores reduce the amount of sanding per unit of time, on the other hand, a certain lubricating film is generated by the synthetic resin material and, as a third side effect in many cases there is still an odor impairment. In practice, therefore, resin-bonded grinding wheels are used that are not soaked.
- the present invention is therefore based on the object of providing an abrasive body which, without reducing the abrasive performance and without changing the abrasive characteristic, can form cracks or breakouts in critical areas prevented.
- a synthetic resin-bonded grinding wheel with improved wet strength in some areas which is provided for clamping with at least one bore and recesses for receiving clamping flanges on its end faces, in that the recesses are rounded off with a radius that is 0.027 to 0 , 2 times the diameter of the bore, and the areas where the clamping flanges engage and the recesses and the adjoining partial areas of the end faces are sealed or coated with a water-repellent synthetic resin.
- the endangered areas are impregnated or coated with a synthetic resin, the attack of the water in this area is no longer possible, so that the use of cooling lubricants during grinding no longer leads to a drop in strength in this area, that is to say in the flange area the grinding wheel comes.
- the notch effect is reduced by the application of radii, so that this also results in an increase in strength.
- the radius as such is between 0.027 and 0.2 times the bore diameter, the lower limit of this area being far above the usual manufacturing dimensions and the upper area being limited by the available area and the resulting maximum permissible surface pressure is.
- An advantageous embodiment of the invention provides that the diameter of the recess is equal to or greater than the sum of the flange outer diameter and twice the radius of the rounding.
- the flange does not have to be chamfered in its outer area, which leads to a simplification in the manufacture of the flange. Nevertheless, there is no damage to the recess when clamping the grinding wheel.
- a particularly preferred embodiment of the invention provides that the radius of the rounding is equal to or greater is.
- a large number of substances can be used as synthetic resin for the sealing or coating, such as shellac or an ethanolic novolac solution.
- epoxy resin is particularly preferred because, in addition to the water-repellent effect, this also leads to an additional mechanical hardening of this critical area of the grinding wheel.
- the synthetic resins are advantageously applied in liquid form as fast-curing clearcoats, which can be done before or after firing, that is to say the hardening of the grinding wheels.
- a grinding wheel with the following dimensions was manufactured: outer diameter 508.0 mm, width 152.5 mm, Bore diameter 304.8 mm 2 face cut-outs 365.0 mm diameter, depth 25.0 mm, Radius at the recess 18.0 mm.
- the curing took place as usual by heating up to 80 o C in six hours Holding time at 80 o C three hours, Heating up to 90 o C in five hours, Heating up to 120 o C in eight hours, Heating up to 130 o C in four hours, Heating up to 140 o C in four hours, Heating up to 150 o C in four hours, Heating up to 160 o C in four hours, Heating up to 175 o C in four hours, Holding time at 175 o C for six hours.
- the recess in the flange areas and a partial area on the end faces were coated with 20.0 g of a two-component corrosion-enamel paint, viscosity 400 to 500 cp, manufacturer Stromit.
- the paint was applied by hand with a brush and after three hours of drying, the abrasive body defined above was coated again.
- the curing time was twelve hours at room temperature, the coating thickness for the partial coating was 1.5 mm.
- a grinding wheel produced according to Example 1 was sealed with an ethanolic Novolak solution in the areas of the recess in the flange and in a partial area on the end face.
- 50.0 g of novolak were heated and stirred into 50.0 g of ethanol and brought to solution.
- the solution was cooled to the above after cooling Areas were applied, the seal was cured at 130 o C, the curing time was four hours, the penetration depth of the impregnation was 2.5 mm.
- the grinding wheel (7) is connected via flanges (6) to a shaft (8) which extends through the bore (1) of the grinding wheel (7).
- the annular shoulder or the flange (6) are arranged in the cutouts (2). Their outer diameter extends close to the radius (4) with which the recesses (2) are rounded.
- the areas (5) of the end faces (3) which are rounded against the cutouts (2) by the radius (13) and the cutouts (2) which are rounded by the radii (14) with respect to the bore (1), are coated with a clear lacquer based on epoxy resin, whereby the pores (9) in this area are closed.
- the diameter (11) of the recesses (2) in FIGS. 1 and 2 has approximately the value of the outer diameter of the flange (6) plus twice the size of the radius (4), the center of which here lies within the grinding wheel (7).
- the grinding body (7) has pores (9) which are open to the outside in the region of the end face (3) and are covered by a coating (12).
- a seal (10) is introduced instead of a coating (12); H.
- a material with a lower viscosity was used which penetrated into the pores (9) and filled them up.
- the depth of penetration in this case was 2.5 mm.
- FIG. 5 shows that the radius (4 ') is made substantially larger than the radii (13, 14). It can also be seen from this that the center point M ', from which the radius (4') starts, is arranged outside the grinding wheel (7).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Die Erfindung betrifft einen kunstharzgebundenen Schleifkörper mit in Teilbereichen verbesserter Naßfestigkeit, der zum Spannen mit mindestens einer Bohrung sowie ggf. Aussparungen zur Aufnahme von Spannflanschen an der Stirnseite des Körpers versehen ist.The invention relates to a resin-bonded grinding wheel with improved wet strength in some areas, which is provided for clamping with at least one bore and, if necessary, recesses for receiving clamping flanges on the end face of the body.
Kunstharzgebundene Schleifkörper sind seit langem erfolgreich im Einsatz. Es sind auch keramisch gebundene Schleifkörper bekannt, die zur Verbesserung der Festigkeit durchgehend imprägniert sind. Die dabei verwandten Imprägniermittel setzen die in dem Körper vorhandenen Poren zu und verändern dadurch die Schleifeigenschaften zum Negativen, weil durch die geschlossenen Poren der Abschliff pro Zeiteinheit verringert wird, zum anderen durch das eingebrachte Kunstharzmaterial ein gewisser Schmierfilm erzeugt wird und als dritte Nebenwirkung in vielen Fällen noch eine Geruchsbeeinträchtigung auftritt. In der Praxis werden deshalb kunstharzgebundene Schleifkörper eingesetzt, die nicht getränkt sind.Resin-bonded grinding wheels have been used successfully for a long time. Ceramic-bonded grinding wheels are also known, which are impregnated throughout to improve their strength. The related impregnation agents clog the pores in the body and thereby change the grinding properties to the negative, because the closed pores reduce the amount of sanding per unit of time, on the other hand, a certain lubricating film is generated by the synthetic resin material and, as a third side effect in many cases there is still an odor impairment. In practice, therefore, resin-bonded grinding wheels are used that are not soaked.
Bei diesen kunstharzgebundenen Schleifkörpern ergaben sich beim Naßschliff Ausbrüche im Spannbereich der Schleifkörper, die zunächst unerklärlich waren. Messungen ergaben, daß durch Veränderung der Scheibentemperatur zwischen -40 und +100 oC zwar eine Maßänderung auftrat, sich diese jedoch nur sehr gering auswirkte, da parallel dazu auch eine Änderung der Längenverhältnisse in der Spannvorrichtung auftrat. Weitere Untersuchungen führten dann zu der Erkenntnis, daß durch die Verwendung von Kühlwasser oder Kühlschmiermitteln eine Schwächung der Kornbindungsbrücken auftritt, die zu einem Sprengfestigkeitsabfall der Scheibe führen, desweiteren tritt eine gewisse Quellung auf, die, da sie nicht durch eine entsprechende Längenänderung der Spannvorrichtung ausgeglichen wird, zu erheblichen Drücken im Spannbereich der Scheibe führt, d. h., daß an diesen kritischen Stellen, also den Aussparungen, eine Rißbildung sowie ggf. Ausbrüche auftreten, die in der weiteren Entwicklung zur Zerstörung der Scheibe führen. Bisher nahm man - ohne Kenntnis der vorstehenden Untersuchungsergebnisse - den Nachteil in Kauf, daß bei Berührung mit Wasser bzw. Kühlschmiermitteln ein merklicher Abfall in der Festigkeit der Schleifkörper auftritt.With these resin-bonded grinding wheels, there were chipping in the clamping area of the grinding wheel during wet grinding, which were initially inexplicable. Measurements showed that a change in dimensions occurred due to a change in the disc temperature between -40 and +100 o C, but this had only a very slight effect, since a change in the length ratios also occurred in parallel in the clamping device. Further investigations then led to the realization that the use of cooling water or cooling lubricants leads to a weakening of the grain binding bridges, which leads to a drop in the explosive strength of the pane, and furthermore a certain swelling occurs which, since it is not compensated for by a corresponding change in the length of the tensioning device , leads to considerable pressures in the clamping area of the disk, that is to say that at these critical points, that is to say the cutouts, cracking and possibly breakouts occur which lead to the destruction of the disk in the further development. So far - without knowledge of the above test results - the disadvantage was accepted that a contact with water or cooling lubricants leads to a noticeable drop in the strength of the grinding wheels.
Der vorliegenden Erfindung liegt damit die Aufgabe zugrunde, einen Schleifkörper zu schaffen, der ohne Verringerung der Schleifleistung und ohne Veränderung der Schleifcharakteristik die Bildung von Rissen oder Ausbrüchen in kritischen Bereichen verhindert.The present invention is therefore based on the object of providing an abrasive body which, without reducing the abrasive performance and without changing the abrasive characteristic, can form cracks or breakouts in critical areas prevented.
Erfindungsgemäß gelöst wird das bei einem kunstharzgebundenen Schleifkörper mit in Teilbereichen verbesserter Naßfestigkeit, der zum Spannen mit mindestens einer Bohrung sowie Aussparungen zur Aufnahme von Spannflanschen an seinen Stirnseiten versehen ist, dadurch, daß die Aussparungen mit einem Radius abgerundet ist, der dem 0,027- bis 0,2-fachen des Durchmessers der Bohrung entspricht, und der Bereiche, an dem die Spannflansche angreifen sowie die Aussparungen und die daran angrenzenden Teilbereiche der Stirnseiten mit einem wasserabweisendem Kunstharz versiegelt oder beschichtet ist.This is solved according to the invention in a synthetic resin-bonded grinding wheel with improved wet strength in some areas, which is provided for clamping with at least one bore and recesses for receiving clamping flanges on its end faces, in that the recesses are rounded off with a radius that is 0.027 to 0 , 2 times the diameter of the bore, and the areas where the clamping flanges engage and the recesses and the adjoining partial areas of the end faces are sealed or coated with a water-repellent synthetic resin.
Dadurch, daß die gefährdeten Stellen mit einem Kunstharz imprägniert oder beschichtet sind, ist der Angriff des Wassers in diesem Bereich nicht mehr möglich, so daß es bei Verwendung von Kühlschmiermitteln während des Schleifens nicht mehr zu einem Abfall der Festigkeit in diesem Bereich, also im Flanschbereich der Schleifkörper, kommt. Zusätzlich wird durch das Anbringen von Radien die Kerbwirkung herabgesetzt, so daß sich auch dadurch eine Festigkeitssteigerung ergibt.Because the endangered areas are impregnated or coated with a synthetic resin, the attack of the water in this area is no longer possible, so that the use of cooling lubricants during grinding no longer leads to a drop in strength in this area, that is to say in the flange area the grinding wheel comes. In addition, the notch effect is reduced by the application of radii, so that this also results in an increase in strength.
Der Radius als solcher liegt zwischen dem 0,027- und dem 0,2-fachen des Bohrungsdurchmessers, wobei die untere Grenze dieses Bereiches weit oberhalb der bisher üblichen Fertigungsmaße liegt und der obere Bereich durch die zur Verfügung stehende Fläche und die dadurch auftretende maximal zulässige Flächenpressung begrenzt ist.The radius as such is between 0.027 and 0.2 times the bore diameter, the lower limit of this area being far above the usual manufacturing dimensions and the upper area being limited by the available area and the resulting maximum permissible surface pressure is.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Durchmesser der Aussparung gleich oder größer der Summe aus Flanschaußendurchmesser und doppeltem Radius der Abrundung ist. In diesem Falle muß der Flansch in seinem Außenbereich nicht angefast werden, was zu einer Vereinfachung bei der Flanschherstellung führt. Trotzdem tritt keine Beschädigung der Aussparung beim Spannen des Schleifkörpers auf.An advantageous embodiment of the invention provides that the diameter of the recess is equal to or greater than the sum of the flange outer diameter and twice the radius of the rounding. In this case, the flange does not have to be chamfered in its outer area, which leads to a simplification in the manufacture of the flange. Nevertheless, there is no damage to the recess when clamping the grinding wheel.
Eine besonders bevorzugte Ausgestaltung der Erfindung sieht vor, daß der Radius der Abrundung gleich oder größer
ist.A particularly preferred embodiment of the invention provides that the radius of the rounding is equal to or greater
is.
Als Kunstharz für die Versiegelung oder Beschichtung sind eine Vielzahl von Stoffen einsetzbar, wie beispielsweise Schellack oder eine äthanolische Novolack-Lösung. Besonders bevorzugt wird jedoch Epoxidharz, weil dieser außer der wasserabweisenden Wirkung auch zu einer zusätzlichen mechanischen Verfestigung dieses kritischen Bereiches des Schleifkörpers führt.A large number of substances can be used as synthetic resin for the sealing or coating, such as shellac or an ethanolic novolac solution. However, epoxy resin is particularly preferred because, in addition to the water-repellent effect, this also leads to an additional mechanical hardening of this critical area of the grinding wheel.
Vorteilhaft werden dabei die Kunstharze in flüssiger Form als schnellhärtende Klarlacke aufgebracht, was vor oder nach dem Brennen, also dem Aushärten der Schleifkörper, erfolgen kann.The synthetic resins are advantageously applied in liquid form as fast-curing clearcoats, which can be done before or after firing, that is to say the hardening of the grinding wheels.
Es wurde ein Schleifkörper mit folgenden Abmessungen gefertigt:
82 kg Korn der Körnung 800 eines weißen Edelkorundes wurden mit 3 kg flüssigem Resol der Viskosität 600 bis 1.000 cp benetzt und dreißig Minuten in einem Planetenrührwerk gemischt. Dem benetzten Korn wurden sodann 15 kg Novolak-Phenolharz zugegeben und fünf Minuten vermengt. Dabei entstandene Agglomerate und Zusammenballungen wurden abgesiebt. 77,8 kg dieser Mischung wurden in einer Preßform verteilt und in üblicher Weise zu Schleifkörpern der oben genannten Abmessung verpreßt. Die Aushärtung erfolgte wie üblich durch Aufheizen bis 80 oC in sechs Stunden
Haltezeit bei 80 oC drei Stunden,
Aufheizen bis 90 oC in fünf Stunden,
Aufheizen bis 120 oC in acht Stunden,
Aufheizen bis 130 oC in vier Stunden,
Aufheizen bis 140 oC in vier Stunden,
Aufheizen bis 150 oC in vier Stunden,
Aufheizen bis 160 oC in vier Stunden,
Aufheizen bis 175 oC in vier Stunden,
Haltezeit bei 175 oC sechs Stunden.82 kg of grain size 800 of a white high-grade corundum were wetted with 3 kg of liquid resol with a viscosity of 600 to 1,000 cp and mixed for thirty minutes in a planetary mixer. 15 kg of novolak phenolic resin were then added to the wetted grain and mixed for five minutes. The resulting agglomerates and agglomerations were screened off. 77.8 kg of this mixture were distributed in a press mold and pressed in the usual way to form abrasive articles of the abovementioned dimensions. The curing took place as usual by heating up to 80 o C in six hours
Holding time at 80 o C three hours,
Heating up to 90 o C in five hours,
Heating up to 120 o C in eight hours,
Heating up to 130 o C in four hours,
Heating up to 140 o C in four hours,
Heating up to 150 o C in four hours,
Heating up to 160 o C in four hours,
Heating up to 175 o C in four hours,
Holding time at 175 o C for six hours.
Nach dem Aushärten wurde an dem Schleifkörper eine beidseitige Aussparung der Abmessung 365,0 mm Durchmesser x 25,0 mm Tiefe angebracht. Der Radius der Aussparung betrug 18,0 mm.After hardening, a recess on both sides measuring 365.0 mm in diameter × 25.0 mm in depth was made on the grinding wheel. The radius of the recess was 18.0 mm.
Bei einem gemäß Beispiel 1 gefertigten Schleifkörper wurde die Aussparung der Flanschbereiche und ein Teilbereich der Stirnseiten mit 20,0 g eines Zweikomponenten Korrosions-Emaille-Lacks, Viskosität 400 bis 500 cp, Hersteller Fa. Stromit, lackiert. Der Lack wurde mit einem Pinsel von Hand aufgebracht und nach dreistündiger Trocknung wurde der vorstehend definierte Schleifkörper erneut beschichtet. Die Aushärtezeit betrug bei Raumtemperatur zwölf Stunden, die Beschichtungsstärke bei der partiellen Lackierung lag bei 1,5 mm.In the case of a grinding wheel manufactured according to Example 1, the recess in the flange areas and a partial area on the end faces were coated with 20.0 g of a two-component corrosion-enamel paint, viscosity 400 to 500 cp, manufacturer Stromit. The paint was applied by hand with a brush and after three hours of drying, the abrasive body defined above was coated again. The curing time was twelve hours at room temperature, the coating thickness for the partial coating was 1.5 mm.
Ein gemäß Beispiel 1 erstellter Schleifkörper wurde in den Bereichen der Aussparung des Flansches und in einem Teilbereich der Stirnseite mit einer äthanolischen Novolak-Lösung versiegelt. Dazu wurden 50,0 g Novolak erwärmt und in 50,0 g Äthanol eingerührt und zur Lösung gebracht. Die Lösung wurde nach Abkühlung auf die vorgenannten Bereiche aufgebracht, die Versiegelung wurde bei 130 oC ausgehärtet, die Aushärtedauer betrug vier Stunden, die Eindringtiefe der Imprägnierung lag bei 2,5 mm.A grinding wheel produced according to Example 1 was sealed with an ethanolic Novolak solution in the areas of the recess in the flange and in a partial area on the end face. For this purpose, 50.0 g of novolak were heated and stirred into 50.0 g of ethanol and brought to solution. The solution was cooled to the above after cooling Areas were applied, the seal was cured at 130 o C, the curing time was four hours, the penetration depth of the impregnation was 2.5 mm.
Die Erfindung wird nachstehend anhand der Zeichnungen näher erläutert, ohne sie jedoch darauf zu beschränken.
- Fig. 1
- zeigt einen Schleifkörper in perspektivischer Darstellung,
- Fig. 2
- einen auf eine Welle aufgebrachten Schleifkörper im Schnitt,
- Fig. 3 und 4
- je einen Ausschnitt aus den Stirnseiten des Schleifkörpers im Bereich III bzw. IV,
- Fig. 5
- eine weitere Ausführung eines Schleifkörpers in vergrößerter Detailschnitt-Darstellung.
- Fig. 1
- shows a grinding wheel in perspective,
- Fig. 2
- a grinding wheel applied to a shaft in section,
- 3 and 4
- a section of the end faces of the grinding wheel in area III and IV,
- Fig. 5
- a further embodiment of a grinding wheel in an enlarged detail sectional view.
Der Schleifkörper (7) ist über Flansche (6) mit einer Welle (8) verbunden, die sich durch die Bohrung (1) des Schleifkörpers (7) erstreckt. Die Ringschulter bzw. der Flansch (6) sind in den Aussparungen (2) angeordnet. Ihr Außendurchmesser erstreckt sich bis in die Nähe des Radius (4), mit dem die Aussparungen (2) gerundet sind. Die Bereiche (5) der Stirnseiten (3), die gegen die Aussparungen (2) durch den Radius (13) gerundet sind, sowie die Aussparungen (2), die gegenüber der Bohrung (1) durch die Radien (14) gerundet sind, sind mit einem Klarlack auf Basis von Epoxidharz beschichtet, wodurch die Poren (9) in diesem Bereich geschlossen sind.The grinding wheel (7) is connected via flanges (6) to a shaft (8) which extends through the bore (1) of the grinding wheel (7). The annular shoulder or the flange (6) are arranged in the cutouts (2). Their outer diameter extends close to the radius (4) with which the recesses (2) are rounded. The areas (5) of the end faces (3) which are rounded against the cutouts (2) by the radius (13) and the cutouts (2) which are rounded by the radii (14) with respect to the bore (1), are coated with a clear lacquer based on epoxy resin, whereby the pores (9) in this area are closed.
Der Durchmesser (11) der Ausnehmungen (2) hat in Figur 1 und 2 etwa den Wert des Außendurchmessers des Flansches (6) plus 2x Größe von Radius (4), dessen Mittelpunkt hier innerhalb des Schleifkörpers (7) liegt.The diameter (11) of the recesses (2) in FIGS. 1 and 2 has approximately the value of the outer diameter of the flange (6) plus twice the size of the radius (4), the center of which here lies within the grinding wheel (7).
Wie aus Figur 4 zu erkennen, weist der Schleifkörper (7) im Bereich der Stirnseite (3) nach außen geöffnete Poren (9) auf, die durch eine Beschichtung (12) abgedeckt sind.As can be seen from FIG. 4, the grinding body (7) has pores (9) which are open to the outside in the region of the end face (3) and are covered by a coating (12).
Gemäß Figur 3 ist statt einer Beschichtung (12) eine Versiegelung (10) eingebracht, d. h. es wurde ein Material mit einer geringeren Viskosität eingesetzt, das in die Poren (9) eingedrungen ist und diese auffüllte. Die Eindringtiefe lag in diesem Fall bei 2,5 mm.According to FIG. 3, a seal (10) is introduced instead of a coating (12); H. a material with a lower viscosity was used which penetrated into the pores (9) and filled them up. The depth of penetration in this case was 2.5 mm.
Die Figur 5 zeigt in einer weiteren Ausführung, daß der Radius (4') gegenüber den Radien (13, 14) wesentlich größer ausgeführt ist. Ferner ist daraus ersichtlich, daß der Mittelpunkt M', von dem der Radius (4') ausgeht, außerhalb des Schleifkörpers (7) angeordnet ist.In a further embodiment, FIG. 5 shows that the radius (4 ') is made substantially larger than the radii (13, 14). It can also be seen from this that the center point M ', from which the radius (4') starts, is arranged outside the grinding wheel (7).
Claims (5)
- Abrasive body bonded by a synthetic resin, having an improved water resistance in parts, and which for clamping is provided with at least one bore (1) and with recesses (2) to receive clamping flanges (6) on its end faces (3), characterised in that the recess (2) is rounded off with a radius (4) which corresponds to 0.027 to 0.2 times the diameter of the bore (1), and the region with which the clamping flanges (6) engage, as well as the recesses (2) and the parts (5), bordering the latter, of the end faces (3), are sealed or coated with a water-repellent synthetic resin.
- Abrasive body bonded by a synthetic resin according to Claim 1, characterised in that the diameter (11) of the recess (2) is equal to or greater than the sum of the outside diameter of the flange and twice the radius of the rounding-off (4,4').
- Abrasive body bonded by a synthetic resin according to either of Claims 1 and 2, characterised in that the radius of the rounding-off (4,4') is equal to or greater than
- Abrasive body bonded by a synthetic resin according to one of Claims 1 to 3, characterised in that the synthetic resin for the sealing or coating is an epoxy resin.
- Abrasive body bonded by a synthetic resin according to one of Claims 1 to 4, characterised in that the synthetic resin for the sealing or coating is applied in liquid form as a rapid-hardening clear lacquer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87102800T ATE74049T1 (en) | 1986-03-08 | 1987-02-27 | RESIN-BOND ABRASIVE BODY. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3607661 | 1986-03-08 | ||
| DE19863607661 DE3607661A1 (en) | 1986-03-08 | 1986-03-08 | RESIN-BONDED GRINDING BODY |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0236877A2 EP0236877A2 (en) | 1987-09-16 |
| EP0236877A3 EP0236877A3 (en) | 1989-06-07 |
| EP0236877B1 true EP0236877B1 (en) | 1992-03-25 |
Family
ID=6295827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87102800A Expired - Lifetime EP0236877B1 (en) | 1986-03-08 | 1987-02-27 | Abrasive body bonded by a synthetic resin |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0236877B1 (en) |
| AT (1) | ATE74049T1 (en) |
| DE (2) | DE3607661A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9486896B2 (en) | 2012-06-28 | 2016-11-08 | Saint-Gobain Abrasives, Inc. | Abrasive article and coating |
| US9844853B2 (en) | 2014-12-30 | 2017-12-19 | Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs | Abrasive tools and methods for forming same |
| CA3009791A1 (en) | 2015-12-30 | 2017-07-06 | Saint-Gobain Abrasives, Inc. | Abrasive tools and methods for forming same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR921586A (en) * | 1943-03-09 | 1947-05-12 | Sharpening stone | |
| US2785515A (en) * | 1956-03-14 | 1957-03-19 | Simonds Abrasive Company | Grinding wheel and means for mounting and driving the same |
| FR74270E (en) * | 1958-10-11 | 1960-11-07 | Centering ring for grinding wheels and the like | |
| US3110993A (en) * | 1962-07-18 | 1963-11-19 | Continental Granite Corp | Grinding wheel with provision for coolant application |
| US3526063A (en) * | 1965-03-08 | 1970-09-01 | Norton Co | Integral mounting means and reinforcement for grinding wheels |
| US4240230A (en) * | 1979-01-24 | 1980-12-23 | The Carborundum Company | Throw-away adaptors for grinding wheels |
-
1986
- 1986-03-08 DE DE19863607661 patent/DE3607661A1/en not_active Withdrawn
-
1987
- 1987-02-27 DE DE8787102800T patent/DE3777675D1/en not_active Expired - Fee Related
- 1987-02-27 EP EP87102800A patent/EP0236877B1/en not_active Expired - Lifetime
- 1987-02-27 AT AT87102800T patent/ATE74049T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0236877A2 (en) | 1987-09-16 |
| DE3777675D1 (en) | 1992-04-30 |
| EP0236877A3 (en) | 1989-06-07 |
| ATE74049T1 (en) | 1992-04-15 |
| DE3607661A1 (en) | 1987-09-10 |
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