EP0989924A1 - Grinding wheel - Google Patents

Grinding wheel

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Publication number
EP0989924A1
EP0989924A1 EP99916712A EP99916712A EP0989924A1 EP 0989924 A1 EP0989924 A1 EP 0989924A1 EP 99916712 A EP99916712 A EP 99916712A EP 99916712 A EP99916712 A EP 99916712A EP 0989924 A1 EP0989924 A1 EP 0989924A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
recesses
grinding
shaped
wheel according
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
Application number
EP99916712A
Other languages
German (de)
French (fr)
Other versions
EP0989924B1 (en
Inventor
Markus Fischbacher
Hans Noichl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tyrolit-Schleifmittelwerke Swarovski KG
Tyrolit Schleifmittelwerke
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
Tyrolit Schleifmittelwerke
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tyrolit-Schleifmittelwerke Swarovski KG, Tyrolit Schleifmittelwerke filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Priority to EP02003521A priority Critical patent/EP1225007A1/en
Publication of EP0989924A1 publication Critical patent/EP0989924A1/en
Application granted granted Critical
Publication of EP0989924B1 publication Critical patent/EP0989924B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
    • 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
    • B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
    • 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
    • B24D7/10—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 with cooling provisions

Definitions

  • the invention relates to a grinding wheel with a carrier wheel and a grinding layer arranged thereon on the circumferential side, the grinding layer having a large number of recesses distributed over the circumference.
  • the invention further relates to a grinding device with a device for supplying a coolant and / or lubricant.
  • Grinding disks are already known in which segments provided with abrasive grain on a carrier disk are attached, for example glued, distributed over the circumference. It is also already known to arrange these segments at a circumferential distance from one another and to feed liquid coolant and / or lubricant into the recesses formed between the segments.
  • the object of the invention is to improve the known grinding wheels, in particular with regard to improved grinding properties and greater stability.
  • the recesses are cup-shaped or bucket-shaped in a radial view of the circumference of the grinding wheel.
  • the recesses While in the prior art the recesses run straight across the entire width of the grinding wheel in a radial view of the circumference of the grinding wheel transversely to the circumferential direction, the recesses according to the invention are cup-shaped or bucket-shaped, ie they are bounded on both sides at least over a certain range, so that the coolant and / or lubricant fed into the grinding area is held in the transverse direction and thus remains better in the grinding zone.
  • this does not necessarily mean that the recesses must be closed towards the peripheral edge of the grinding wheel.
  • the recesses can also extend to the lateral circumference of the grinding wheel, that is to say they are open to the side, but that cup-shaped or bucket-shaped shapes of the recess are nevertheless formed, preferably by recesses which are essentially V-shaped or U-shaped. Whether open or closed recesses on the side 2 can be used and we are wide the lateral openings of these recesses, can be selected from the type of coolant supply, the amount of coolant and / or lubricant or the supply pressure.
  • Such essentially V-shaped or U-shaped recesses enable an additional effect, namely the guiding of coolant and / or lubricant from the peripheral edge of the grinding wheel towards the center (ie towards the arrowhead of the V or the apex of the U).
  • Several V's and U's can also be lined up next to one another and, for example, can result in a serrated shape of the recesses. A hydrodynamic pressure build-up thus occurs.
  • Such grinding wheels with V- or U-shaped recesses which are distributed over the circumference, are generally bound to the direction of rotation, i. H. the desired effect can only be achieved with one direction of rotation, namely the one in which the V or U is moved forward in an open manner.
  • FIG. 1 shows a partially broken away perspective view of a first embodiment of a grinding wheel according to the invention
  • 3 shows part of the circumferential development of a grinding wheel according to the invention, 3 shows a schematic side view of an embodiment of a grinding device according to the invention,
  • FIG. 5 and FIG. 6 each show embodiments of a grinding wheel according to the invention in a section perpendicular to the axis
  • FIGS. 7 and 8 each show further circumferential developments of exemplary embodiments of grinding wheels according to the invention.
  • the fig. 9b shows a radial view of the circumference of this grinding wheel
  • 11 a to 11 c show, in a highly schematic manner, further possibilities of the shapes of the recesses, each in a radial view of the circumference of the grinding wheel.
  • a plurality of grinding segments 2 arranged with a circumferential spacing from one another are glued onto a carrier or a carrier disc 1 (for example made of steel, ceramic, damping carrier body, CF carrier body).
  • the abrasive grain (abrasive) and the type of bond are arbitrary in themselves.
  • corundum, CBN (cubic boron nitride) are suitable abrasives.
  • ceramic, synthetic resin or metal can be used as bonds.
  • the separate grinding segments are arrow-shaped, so that between them there are V-shaped recesses 3, which are shown in black in FIGS. 1 and 2. These V-shaped recesses are cup-shaped or bucket-shaped in a radial view of the circumference of the grinding wheel (approximately in the middle of FIG. 2). 4
  • V-shaped segments for example a ceramic grinding material
  • V-shaped recesses 3 which are open towards the lateral peripheral edge 1a of the disk.
  • the recesses 3 are open to the side, there is nevertheless a cup-shaped or bucket-shaped area, which is shown in dotted lines in FIG. 3 and which has the circumferential length A and the circumferential width B. This area is closed on both sides, so that the coolant and / or lubricant cannot escape transversely to the direction of movement 4 or circumferential direction.
  • the laterally open recesses 3 allow, for example, a coolant supply from the side, as is done via the devices 5 in FIG. 2.
  • the coolant and / or lubricant which emerges in liquid form from the nozzles of the devices 5 can penetrate from the side into the laterally open recesses and is guided there to the center of the grinding wheel due to the V-shape of the recess.
  • Fig. 4 shows a highly schematic of a grinding wheel according to the invention and a device 5 for supplying coolant and / or lubricant in a substantially tangential direction just above the contact area with the workpiece 6. According to the invention, not only in the same direction but also in the opposite direction grind.
  • each recess 3 extends in depth into the carrier disc 1.
  • a recess area 3a is still available as a cup-shaped or bucket-shaped area 5 stands in place of thicker abrasive segments, a preferably single-layer thin layer of abrasive grain can also be applied to the carrier.
  • the recesses can then mainly extend in depth in the carrier.
  • the segments each have a radially outer one Abrasives, in particular abrasive grain, contain, the radial thickness of this outer area being less than the radial extent of the recesses between the segments
  • the grinding segments 2 are essentially U-shaped, so that overall there are essentially U-shaped recesses 3 between them, which are cup-shaped or scoop-shaped in a radial view of the circumference of the grinding wheel
  • the grinding segments 2 are angled twice at right angles in the plan view and arranged so closely to one another that there is no opening to the side of the grinding wheel, that is to say essentially cup-shaped recesses 3 are formed. or V-shaped recesses there is no directional guide effect towards the center of the grinding wheel in this exemplary embodiment, however, the laterally closed cup-shaped recesses are sufficient to achieve an improvement over conventional grinding wheels, in which the recesses are completely open to the side
  • the diameter of the grinding wheel varies over the width of the grinding wheel, ie the grinding layer 2 applied to the carrier 1 has a height profile H, the maximum of which is denoted by 2 '.
  • This maximum is 2' most heavily loaded during grinding
  • the invention now allows, by special design of the recesses 3, as shown, for example, in FIG. 9b, to supply most of the cow medium precisely to this maximum 2 ′, for example by the tip 3 ′ of a V-shaped area with respect to the
  • the circumferential movement 8 at the same latitude (indicated by the dashed line 7) lies like the maximum 2 '.
  • This configuration means that the coolant and / or lubricant is preferably required at the latitude 7 and thus that 6 Height maximum 2 'in the diameter of the grinding wheel preferably cooled or lubricated.
  • the invention allows a specific distribution and supply of the coolant and / or lubricant to be realized by special design of the recesses.
  • the grinding segment 2 - seen in the radial direction - is designed differently, only the radially outer region 2b has grinding grain.
  • the radially inner area 2b is free of abrasive grain. Nevertheless, the recess 3 extends in the radial direction over both areas 2a and 2b.
  • FIG. 11 a to 11 c show further exemplary embodiments for the arrangement of the recesses 3.
  • U-shaped and V-shaped recesses alternate, in FIG. 11 b there are two V-shaped recesses, forming one overall “Jagged” line arranged side by side.
  • FIG. 11c shows V-shaped recesses 3 distributed over the circumferential surfaces.
  • the invention is not restricted to the exemplary embodiments shown.
  • the shape of the segments or the recesses formed between them can vary, for example a serrated shape of the recesses is possible.
  • the length and the dimensioning of the segments or the recesses can be adapted to the respective grinding requirements. In principle, it is also possible to use a continuous grinding layer in which the recesses are formed. In practice, however, it is probably cheaper to build up a large number of segments directly or at a distance from one another.
  • the concept of the grinding wheel can be seen widely and also includes scanning tools.

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

Abstract

The abrasive disc has a number of recesses (3) distributed over its periphery. The recesses are beaker- or shovel-shaped when viewed radially on the periphery, and are at least partly U or V-shaped, or rectangular. The abrasive layer consists of a number of segments (2). The support disc (1) has feeder ducts for coolant and or lubricant and ending at the base of the recesses. -

Description

1 S c h l e i f s c h e i b e 1 S c h l e i f s c h e i b e
Die Erfindung betrifft eine Schleifscheibe mit einer Trägerscheibe und einer umfangs- seitig darauf angeordneten Schleifschicht, wobei die Schleifschicht eine Vielzahl über den Umfang verteilter Ausnehmungen aufweist. Weiters betrifft die Erfindung eine Schleifeinrichtung mit einer Einrichtung zur Zufuhr eines Kühl- und/oder Schmiermittels.The invention relates to a grinding wheel with a carrier wheel and a grinding layer arranged thereon on the circumferential side, the grinding layer having a large number of recesses distributed over the circumference. The invention further relates to a grinding device with a device for supplying a coolant and / or lubricant.
Es sind bereits Schleifscheiben bekannt, bei denen auf einer Trägerscheibe mit Schleifkorn versehene Segmente über den Umfang verteilt angebracht, beispielsweise aufgeklebt, sind. Es ist auch bereits bekannt, diese Segmente mit einem umfangsmä- ßigen Abstand voneinander anzuordnen und in die zwischen den Segmenten gebildeten Ausnehmungen flüssiges Kühl- und/oder Schmiermittel zuzuführen.Grinding disks are already known in which segments provided with abrasive grain on a carrier disk are attached, for example glued, distributed over the circumference. It is also already known to arrange these segments at a circumferential distance from one another and to feed liquid coolant and / or lubricant into the recesses formed between the segments.
Aufgabe der Erfindung ist es, die bekannten Schleifscheiben zu verbessern, insbesondere im Hinblick auf verbesserte Schleifeigenschaften und höhere Standfestigkeit.The object of the invention is to improve the known grinding wheels, in particular with regard to improved grinding properties and greater stability.
Erfindungsgemäß wird dies dadurch erreicht, daß die Ausnehmungen in einer radialen Ansicht auf den Umfang der Schleifscheibe becher- oder schaufeiförmig ausgebildet sind.According to the invention this is achieved in that the recesses are cup-shaped or bucket-shaped in a radial view of the circumference of the grinding wheel.
Während beim Stand der Technik die Ausnehmungen in einer radialen Ansicht auf den Umfang der Schleifscheibe quer zur Umfangsrichtung über die gesamte Breite der Schleifscheibe durchgehend gerade verlaufen, sind die erfindungsgemäßen Ausnehmungen becher- oder schaufeiförmig ausgebildet, d. h. sie sind zumindest über einen gewissen Bereich beidseitig begrenzt, sodaß das in den Schleifbereich zugeführte Kühl- und/oder Schmiermittel in Querrichtung gehalten ist und somit besser in der Schleifzone verweilt. Dies bedeutet jedoch nicht unbedingt, daß die Ausnehmungen zum Umfangsrand der Schleifscheibe hin geschlossen sein müssen. Die Ausnehmungen können auch bis zum seitlichen Umfang der Schleifscheibe hin reichen, also zur Seite hin offen sind, daß aber dennoch becher- oder schaufeiförmige Formen der Ausnehmung gebildet werden, vorzugsweise durch im wesentlichen V- oder U-förmig gestaltete Ausnehmungen. Ob seitlich offene oder geschlossene Ausnehmungen ver- 2 wendet werden und wir breit die seitlichen Öffnungen dieser Ausnehmungen sind, kann von der Art der Kühlmittelzufuhr, von der Kühl- und/oder Schmiermittelmenge bzw. dem Zuführdruck gewählt werden.While in the prior art the recesses run straight across the entire width of the grinding wheel in a radial view of the circumference of the grinding wheel transversely to the circumferential direction, the recesses according to the invention are cup-shaped or bucket-shaped, ie they are bounded on both sides at least over a certain range, so that the coolant and / or lubricant fed into the grinding area is held in the transverse direction and thus remains better in the grinding zone. However, this does not necessarily mean that the recesses must be closed towards the peripheral edge of the grinding wheel. The recesses can also extend to the lateral circumference of the grinding wheel, that is to say they are open to the side, but that cup-shaped or bucket-shaped shapes of the recess are nevertheless formed, preferably by recesses which are essentially V-shaped or U-shaped. Whether open or closed recesses on the side 2 can be used and we are wide the lateral openings of these recesses, can be selected from the type of coolant supply, the amount of coolant and / or lubricant or the supply pressure.
Solche im wesentlichen V- oder U-förmigen Ausnehmungen ermöglichen noch einen zusätzlichen Effekt, nämlich das Führen von Kühl- und/oder Schmiermittel vom Um- fangsrand der Schleifscheibe aus zur Mitte hin (also zur Pfeilspitze des V oder zum Scheitel des U). Es können auch mehrere V's und U's nebeneinander gereiht sein und insgesamt beispielsweise eine gezackte Form der Ausnehmungen ergeben. Es kommt somit zu einem hydrodynamischen Druckaufbau. Solche Schleifscheiben mit V- bzw. U-förmigen Ausnehmungen, die über den Umfang verteilt sind, sind im allgemeinen drehrichtungsgebunden, d. h. der gewünschte Effekt läßt sich nur bei einer Drehrichtung erzielen, nämlich der, bei dem das V bzw. U nach vorne offen bewegt wird. Versuche der Anmelderin haben gezeigt, daß sich mit einer solchen Ausbildung tatsäch- lieh wesentliche Verbesserungen erzielen lassen, nämlich eine geringere Leistungsaufnahme, niedrigere Schleifkräfte (insbesondere Normalkräfte), ein sauberes Schliffbild ohne Brandflecken durch bessere Wärmeabfuhr und schließlich die Möglichkeit höherer Vorschubwerte. Gegenversuche, bei denen die identische Schleifscheibe mit umgekehrter Drehrichtung betrieben worden ist, haben wesentlich schlechtere Ergeb- nisse gezeigt und damit den drehrichtungsgebundenen erfindungsgemäßen Effekt bei im wesentlichen V- oder U-förmigen Ausnehmungen indirekt bestätigt.Such essentially V-shaped or U-shaped recesses enable an additional effect, namely the guiding of coolant and / or lubricant from the peripheral edge of the grinding wheel towards the center (ie towards the arrowhead of the V or the apex of the U). Several V's and U's can also be lined up next to one another and, for example, can result in a serrated shape of the recesses. A hydrodynamic pressure build-up thus occurs. Such grinding wheels with V- or U-shaped recesses, which are distributed over the circumference, are generally bound to the direction of rotation, i. H. the desired effect can only be achieved with one direction of rotation, namely the one in which the V or U is moved forward in an open manner. Tests by the applicant have shown that such improvements can actually bring about substantial improvements, namely lower power consumption, lower grinding forces (in particular normal forces), a clean grinding pattern without burn marks due to better heat dissipation and finally the possibility of higher feed values. Cross-tests in which the identical grinding wheel was operated in the opposite direction of rotation have shown significantly poorer results and thus indirectly confirmed the effect of the invention in relation to the direction of rotation with essentially V-shaped or U-shaped recesses.
Weitere Vorteile und Einzelheiten der Erfindung werden anhand der nachfolgenden Figurenbeschreibung näher erläutert.Further advantages and details of the invention are explained in more detail with reference to the following description of the figures.
Die Fig. 1 zeigt in einer teilweise weggebrochenen perspektivischen Ansicht ein erstes Ausführungsbeispiel einer erfindungsgemäßen Schleifscheibe,1 shows a partially broken away perspective view of a first embodiment of a grinding wheel according to the invention,
die Fig. 2 zeigt die Schleifscheibe in einer teilweise weggebrochenen Umfangsansicht,2 shows the grinding wheel in a partially broken peripheral view,
die Fig. 3 zeigt einen Teil der Umfangsabwicklung einer erfindungsgemäßen Schleifscheibe, 3 die Fig. 4 zeigt in einer schematischen Seitenansicht ein Ausführungsbeispiel einer erfindungsgemäßen Schleifeinrichtung,3 shows part of the circumferential development of a grinding wheel according to the invention, 3 shows a schematic side view of an embodiment of a grinding device according to the invention,
die Fig. 5 und die Fig. 6 zeigen jeweils Ausführungsbeispiele einer erfindungsgemäßen Schleifscheibe in einem senkrecht auf die Achse geführten Schnitt,5 and FIG. 6 each show embodiments of a grinding wheel according to the invention in a section perpendicular to the axis,
die Fig. 7 und die Fig. 8 zeigen jeweils weitere Umfangsabwicklungen von Ausführungsbeispielen erfindungsgemäßer Schleifscheiben.FIGS. 7 and 8 each show further circumferential developments of exemplary embodiments of grinding wheels according to the invention.
die Fig. 9a zeigt einen teilweisen Radialschnitt durch ein Ausführungsbeispiel einer erfindungsgemäßen Schleifscheibe,9a shows a partial radial section through an embodiment of a grinding wheel according to the invention,
die fig. 9b zeigt eine radiale Ansicht auf den Umfang dieser Schleifscheibe,the fig. 9b shows a radial view of the circumference of this grinding wheel,
die Fig. 10 zeigt in einem Längsschnitt die besondere Ausbildung eines Schleifsegmentes,10 shows in a longitudinal section the special design of a grinding segment,
die Fig. 11 a bis 11c zeigen stark schematisiert weitere Möglichkeiten der Formen der Ausnehmungen in jeweils einer radialen Ansicht auf den Umfang der Schleifscheibe.11 a to 11 c show, in a highly schematic manner, further possibilities of the shapes of the recesses, each in a radial view of the circumference of the grinding wheel.
Bei der in den Fig. 1 und 2 dargestellten Schleifscheibe sind auf einen Träger bzw. eine Trägerscheibe 1 (beispielsweise aus Stahl, Keramik, dämpfender Trägerkörper, CF-Trägerkörper) mehrere mit umfangsmäßigen Abstand voneinander angeordnete Schleifsegmente 2 aufgeklebt. Das Schleifkorn (Schleifmittel) und die Bindungsart sind an sich beliebig. Beispielsweise sind Korunde, CBN (Kubisches Bornitrid) geeignete Schleifmittel. Als Bindungen kommen beispielsweise Keramik, Kunstharz oder Metall in Frage.In the grinding wheel shown in FIGS. 1 and 2, a plurality of grinding segments 2 arranged with a circumferential spacing from one another are glued onto a carrier or a carrier disc 1 (for example made of steel, ceramic, damping carrier body, CF carrier body). The abrasive grain (abrasive) and the type of bond are arbitrary in themselves. For example, corundum, CBN (cubic boron nitride) are suitable abrasives. For example, ceramic, synthetic resin or metal can be used as bonds.
Die gesonderten Schleifsegmente sind dabei pfeiiförmig ausgebildet, sodaß sich zwi- sehen ihnen V-förmige Ausnehmungen 3 ergeben, die in den Fig. 1 und 2 schwarz dargestellt sind. Diese V-förmigen Ausnehmungen sind in einer radialen Ansicht auf den Umfang der Schleifscheibe (etwa in der Mitte der Fig. 2) becher- bzw. schaufeiförmig ausgebildet. 4The separate grinding segments are arrow-shaped, so that between them there are V-shaped recesses 3, which are shown in black in FIGS. 1 and 2. These V-shaped recesses are cup-shaped or bucket-shaped in a radial view of the circumference of the grinding wheel (approximately in the middle of FIG. 2). 4
Bei dem in Fig. 3 dargestellten Ausführungsbeispiel bilden ebenfalls V-förmige Segmente (beispielsweise ein keramisches Schleifmaterial) im wesentlichen V-förmige Ausnehmungen 3, die zum seitlichen Umfangsrand 1a der Scheibe hin offen sind. Obwohl die Ausnehmungen 3 zur Seite hin offen sind, gibt es doch einen becher- oder schaufeiförmigen Bereich, der in der Fig. 3 punktiert dargestellt ist und der die Um- fangslänge A und die Umfangsbreite B aufweist. Dieser Bereich ist beidseitig geschlossen, sodaß das Kühl- und/oder Schmiermittel quer zur Bewegungsrichtung 4 bzw. Umfangsrichtung nicht austreten kann.In the exemplary embodiment shown in FIG. 3, V-shaped segments (for example a ceramic grinding material) likewise form essentially V-shaped recesses 3 which are open towards the lateral peripheral edge 1a of the disk. Although the recesses 3 are open to the side, there is nevertheless a cup-shaped or bucket-shaped area, which is shown in dotted lines in FIG. 3 and which has the circumferential length A and the circumferential width B. This area is closed on both sides, so that the coolant and / or lubricant cannot escape transversely to the direction of movement 4 or circumferential direction.
Die seitlich offenen Ausnehmungen 3 erlauben beispielsweise eine Kühlmittelzufuhr von der Seite her, wie sie über die Einrichtungen 5 in Fig. 2 erfolgt. Das Kühl- und/oder Schmiermittel, welches in flüssiger Form aus den Düsen der Einrichtungen 5 austritt, kann von der Seite her in die seitlich offenen Ausnehmungen eindringen und wird dort aufgrund der V-Form der Ausnehmung zur Mitte der Schleifscheibe hin geführt.The laterally open recesses 3 allow, for example, a coolant supply from the side, as is done via the devices 5 in FIG. 2. The coolant and / or lubricant which emerges in liquid form from the nozzles of the devices 5 can penetrate from the side into the laterally open recesses and is guided there to the center of the grinding wheel due to the V-shape of the recess.
Die Fig. 4 zeigt stark schematisiert eine erfindungsgemäße Schleifscheibe und eine Einrichtung 5 zur Zufuhr von Kühl- und/oder Schmiermittel und zwar in im wesentlichen tangentialer Richtung knapp oberhalb des Kontaktbereiches mit dem Werkstück 6. Erfindungsgemäß läßt sich nicht nur im Gleichlauf sondern auch im Gegenlauf schleifen.Fig. 4 shows a highly schematic of a grinding wheel according to the invention and a device 5 for supplying coolant and / or lubricant in a substantially tangential direction just above the contact area with the workpiece 6. According to the invention, not only in the same direction but also in the opposite direction grind.
Neben den in Fig. 2 und 4 dargestellten Varianten zur Zufuhr des Kühl- und/oder Schmiermittels besteht auch noch die an sich bekannte Möglichkeit, das Kühl- und/oder Schmiermittel über radiale Kanäle 7 nach außen in den Bereich der Ausnehmungen 3 zu führen. Selbstverständlich können alle Möglichkeiten der Kühl- und/oder Schmiermittelzufuhr miteinander beliebig kombiniert werden.In addition to the variants for supplying the coolant and / or lubricant shown in FIGS. 2 and 4, there is also the possibility known per se of leading the coolant and / or lubricant outward into the area of the recesses 3 via radial channels 7. Of course, all options for the supply of coolant and / or lubricant can be combined with one another as desired.
Die Fig. 6 schematisch ein besonders bevorzugtes Ausführungsbeispiel, bei dem die radiale Erstreckung der Ausnehmung 3 größer ist als die radiale Dicke der Schleifschicht bzw. der Schleifsegmente 2. Mit anderen Worten - erstreckt sich hier jede Ausnehmung 3 tiefenmäßig bis in die Trägerscheibe 1 hinein. Dies hat zur Folge, daß selbst bei nahezu vollständig abgeschliffenen Schleifsegmenten 2 immer noch ein Ausnehmungsbereich 3a als becher- oder schaufeiförmiger Bereich zur Verfügung 5 steht Anstelle von dickeren Schleifsegmenten kann auf dem Trager auch eine vorzugsweise einlagige dünne Schicht aus Schleifkorn aufgebracht sein Die Ausnehmungen können sich dann tiefenmaßig hauptsächlich im Trager erstrecken Bei dickeren Schle fsegmenten kann zum Einsparen von Schleifkorn vorgesehen sein, daß die Segmente jeweils in einen radial äußeren Bereich Schleifmittel, insbesondere Schleifkorn, enthalten, wobei die radiale Dicke dieses äußeren Bereiches geringer ist als die radiale Erstreckung der zwischen den Segmenten hegenden Ausnehmungen6 schematically shows a particularly preferred exemplary embodiment in which the radial extent of the recess 3 is greater than the radial thickness of the grinding layer or the grinding segments 2. In other words, each recess 3 extends in depth into the carrier disc 1. As a result, even with almost completely ground grinding segments 2, a recess area 3a is still available as a cup-shaped or bucket-shaped area 5 stands in place of thicker abrasive segments, a preferably single-layer thin layer of abrasive grain can also be applied to the carrier. The recesses can then mainly extend in depth in the carrier. In the case of thicker abrasive segments, to save abrasive grain it can be provided that the segments each have a radially outer one Abrasives, in particular abrasive grain, contain, the radial thickness of this outer area being less than the radial extent of the recesses between the segments
Bei dem in Fig 7 dargestellten Ausfuhrungsbeispiel sind die Schleifsegmente 2 im we- senthchen U-formig profiliert, sodaß sich insgesamt im Wesentlichen U-formige Ausnehmungen 3 dazwischen ergeben, welche in einer radialen Ansicht auf den Umfang der Schleifscheibe becher- oder schaufelformig ausgebildet sindIn the exemplary embodiment shown in FIG. 7, the grinding segments 2 are essentially U-shaped, so that overall there are essentially U-shaped recesses 3 between them, which are cup-shaped or scoop-shaped in a radial view of the circumference of the grinding wheel
Bei dem in Fig 8 dargestellten, nicht drehrichtungsgebundenen Ausfuhrungsbeispiel sind die Schleifsegmente 2 in der Draufsicht zweimal rechtwinkelig abgewinkelt und so eng aneinander angeordnet, daß zur Seite der Schleifscheibe hin keine Öffnung existiert, es sind also im wesentlichen becherförmige Ausnehmungen 3 gebildet Anders als bei U- oder V-formigen Ausnehmungen gibt es bei diesem Ausfuhrungsbeispiel keinen richtungsgebundenen Fuhrungseffekt zur Schleifscheibenmitte hin, aller- dings reichen αie seitlich geschlossenen becherförmigen Ausnehmungen aus, um eine Verbesserung gegenüber herkömmlichen Schleifscheiben zu erzielen, bei denen die Ausnehmungen zur Seite hin völlig offen sindIn the exemplary embodiment shown in FIG. 8, which is not dependent on the direction of rotation, the grinding segments 2 are angled twice at right angles in the plan view and arranged so closely to one another that there is no opening to the side of the grinding wheel, that is to say essentially cup-shaped recesses 3 are formed. or V-shaped recesses there is no directional guide effect towards the center of the grinding wheel in this exemplary embodiment, however, the laterally closed cup-shaped recesses are sufficient to achieve an improvement over conventional grinding wheels, in which the recesses are completely open to the side
Bei dem in den Fig 9a und 9a dargestellten Ausfuhrungsbeispiel variiert der Durch- messer der Schleifscheibe über die Breite der Schleifscheibe, d h die auf dem Trager 1 aufgebrachte Schleifschicht 2 weist ein Hohenprofil H auf, dessen Maximum mit 2' bezeichnet ist Dieses Maximum 2' ist beim Schleifen am höchsten belastet Die Erfindung erlaubt es nunmehr durch spezielle Gestaltung der Ausnehmungen 3, wie sie beispielsweise in Fig 9b gezeigt ist, gerade diesem Maximum 2' am meisten Kuhimit- tel zuzuführen indem beispielsweise die Spitze 3' eines V-formigen Bereiches bezüglich der Umfangsbewegungsπchtung 8 an der gleichen Breitenstelle (angedeutet durch die stπchlierte Linie 7) liegt wie das Maximum 2' Durch diese Ausbildung wird das Kühl- und/oder Schmiermittel bevorzugt an die Breitenstelle 7 gefordert und damit das 6 Höhenmaximum 2' im Durchmesser der Schleifscheibe bevorzugt gekühlt bzw. geschmiert.In the exemplary embodiment shown in FIGS. 9a and 9a, the diameter of the grinding wheel varies over the width of the grinding wheel, ie the grinding layer 2 applied to the carrier 1 has a height profile H, the maximum of which is denoted by 2 '. This maximum is 2' most heavily loaded during grinding The invention now allows, by special design of the recesses 3, as shown, for example, in FIG. 9b, to supply most of the cow medium precisely to this maximum 2 ′, for example by the tip 3 ′ of a V-shaped area with respect to the The circumferential movement 8 at the same latitude (indicated by the dashed line 7) lies like the maximum 2 '. This configuration means that the coolant and / or lubricant is preferably required at the latitude 7 and thus that 6 Height maximum 2 'in the diameter of the grinding wheel preferably cooled or lubricated.
Überhaupt erlaubt es die Erfindung durch spezielle Ausbildung der Ausnehmungen eine gezielte Verteilung und Zufuhr des Kühl- und/oder Schmiermittels zu verwirklichen.In general, the invention allows a specific distribution and supply of the coolant and / or lubricant to be realized by special design of the recesses.
Bei dem in Fig. 10 dargestellten Ausführungsbeispiel ist das Schleifsegment 2 - in radialer Richtung gesehen - verschieden ausgebildet, nur der radial äußere Bereich 2b weist Schleifkorn auf. Der radial innere Bereich 2b ist frei von Schleifkorn. Dennoch erstreckt sich die Ausnehmung 3 in radialer Richtung über beide Bereiche 2a und 2b.In the exemplary embodiment shown in FIG. 10, the grinding segment 2 - seen in the radial direction - is designed differently, only the radially outer region 2b has grinding grain. The radially inner area 2b is free of abrasive grain. Nevertheless, the recess 3 extends in the radial direction over both areas 2a and 2b.
Die Fig. 1 1 a bis 11c zeigen weitere Ausführungsbeispiele für die Anordnung der Ausnehmungen 3. Bei der Fig. 11a wechseln U-förmige und V-förmige Ausnehmungen ab, bei der Fig. 11 b sind zwei V-förmige Ausnehmungen unter Ausbildung einer insgesamt „gezackten" Linie nebeneinander angeordnet. Die Fig. 11c zeigt über die Umfangsflä- chen verteilte V-förmige Ausnehmungen 3.11 a to 11 c show further exemplary embodiments for the arrangement of the recesses 3. In FIG. 11 a, U-shaped and V-shaped recesses alternate, in FIG. 11 b there are two V-shaped recesses, forming one overall “Jagged” line arranged side by side. FIG. 11c shows V-shaped recesses 3 distributed over the circumferential surfaces.
Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. Die Form der Segmente bzw. der dazwischen gebildeten Ausnehmungen kann variieren, beispielsweise ist eine gezackte Form der Ausnehmungen möglich. Die Länge und die Dimensionierung der Segmente bzw. der Ausnehmungen kann den jeweiligen Schleiferfordernissen angepaßt werden. Grundsätzlich ist es auch möglich, eine durchgehende Schleifschicht zu verwenden, in der die Ausnehmungen ausgebildet sind. In der Praxis ist aber der Aufbau aus einer Vielzahl direkt oder mit Abstand aneinandergereihter Segmente voraussichtlich günstiger. Der Begriff der Schleifscheibe ist weit zu sehen und umfaßt auch Ablichtwerkzeuge. The invention is not restricted to the exemplary embodiments shown. The shape of the segments or the recesses formed between them can vary, for example a serrated shape of the recesses is possible. The length and the dimensioning of the segments or the recesses can be adapted to the respective grinding requirements. In principle, it is also possible to use a continuous grinding layer in which the recesses are formed. In practice, however, it is probably cheaper to build up a large number of segments directly or at a distance from one another. The concept of the grinding wheel can be seen widely and also includes scanning tools.

Claims

7P a t e n t a n s p r ü c h e: 7P claims:
1. Schleifscheibe mit einer Trägerscheibe und einer umfangseitig darauf angeordneten Schleifschicht, wobei die Schleifschicht eine Vielzahl über den Umfang verteilter Ausnehmungen aufweist, dadurch gekennzeichnet, daß die Ausnehmungen (3) in einer radialen Ansicht auf den Umfang der Schleifscheibe becher- oder schaufeiförmig ausgebildet sind.1. grinding wheel with a carrier disc and a circumferentially arranged grinding layer, the grinding layer having a plurality of recesses distributed over the circumference, characterized in that the recesses (3) are cup-shaped or bucket-shaped in a radial view of the circumference of the grinding wheel.
2. Schleifscheibe nach Anspruch 1 , dadurch gekennzeichnet, daß die Ausnehmun- gen (3) in einer radialen Ansicht auf den Umfang der Schleifscheibe zumindest teilweise im wesentlichen V-förmig sind.2. Grinding wheel according to claim 1, characterized in that the recesses (3) are at least partially substantially V-shaped in a radial view of the circumference of the grinding wheel.
3. Schleifscheibe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ausnehmungen (3) in einer radialen Ansicht auf den Umfang der Schleifscheibe zu- mindest teilweise im wesentlichen U-förmig sind.3. Grinding wheel according to claim 1 or 2, characterized in that the recesses (3) are at least partially substantially U-shaped in a radial view of the circumference of the grinding wheel.
4. Schleifscheibe nach Anspruch 1 , dadurch gekennzeichnet, daß die Ausnehmungen (3) in einer radialen Ansicht auf den Umfang der Schleifscheibe im wesentlichen rechteckförmig sind.4. Grinding wheel according to claim 1, characterized in that the recesses (3) are substantially rectangular in a radial view of the circumference of the grinding wheel.
5. Schleifscheibe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Schleifschicht aus einer Vielzahl von Segmenten (2) zusammengesetzt ist, die unter Ausbildung dazwischenliegender Ausnehmungen (3) direkt oder mit Abstand aneinandergereiht sind.5. Grinding wheel according to one of claims 1 to 4, characterized in that the grinding layer is composed of a plurality of segments (2) which are lined up directly or at a distance with the formation of intermediate recesses (3).
6. Schleifscheibe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die radiale Erstreckung der Ausnehmungen (3) größer ist als die radiale Dicke der Schleifschicht (2).6. Grinding wheel according to one of claims 1 to 5, characterized in that the radial extent of the recesses (3) is greater than the radial thickness of the grinding layer (2).
7. Schleifscheibe nach Ansruch 5, dadurch gekennzeichnet, daß sich die Ausnehmungen tiefenmäßig in die Trägerscheibe hinein erstrecken.7. grinding wheel according to claim 5, characterized in that the recesses extend into the depth of the carrier wheel.
8. Schleifscheibe nach Anspruch 5 und Anspruch 6, dadurch gekennzeichnet, daß die Segmente jeweils in einen radial äußeren Bereich Schleifmittel, insbesondere 88. Grinding wheel according to claim 5 and claim 6, characterized in that the segments in each case in a radially outer region of abrasive, in particular 8th
Schleifkom, enthalten, wobei die radiale Dicke dieses äußeren Bereiches geringer ist als die radiale Erstreckung der zwischen den Segmenten liegenden Ausnehmungen.Schleifkom, included, the radial thickness of this outer region is less than the radial extent of the recesses lying between the segments.
9. Schleifscheibe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß sich die Ausnehmungen (3) bis zum seitlichen Umfangsrand der Schleifscheibe hin erstrecken.9. Grinding wheel according to one of claims 1 to 5, characterized in that the recesses (3) extend to the lateral peripheral edge of the grinding wheel.
10. Schleifscheibe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß in der Trägerscheibe (1) Kanäle (7) für die Zufuhr eines Kühl- und/oder10. Grinding wheel according to one of claims 1 to 7, characterized in that in the carrier wheel (1) channels (7) for the supply of a cooling and / or
Schmiermittels vorgesehen sind, die am Grund der Ausnehmungen (3) enden.Lubricants are provided which end at the bottom of the recesses (3).
1 1. Schleifscheibe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sie durch Anordnung und Ausgestaltung der Ausnehmungen drehrichtungsge- bunden ist.1 1. Grinding wheel according to one of claims 1 to 8, characterized in that it is bound in the direction of rotation by arrangement and configuration of the recesses.
12. Schleifscheibe nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, daß ihr Durchmesser über die Breite der Schleifscheibe variiert.12. Grinding wheel according to one of claims 1 to 11, characterized in that its diameter varies over the width of the grinding wheel.
13. Schleifscheibe nach Anspruch 12, dadurch gekennzeichnet, daß die Ausnehmungen so gestaltet sind, daß der - in Umfangsbewegungsrichtung gesehen - hinterste Bereich der Ausnehmung, vorzugsweise die Spitze eines V-förmigen Bereichs der Ausnehmung, an derselben Breitensteile liegt wie der größte Durchmesser der Schleifscheibe.13. Grinding wheel according to claim 12, characterized in that the recesses are designed so that the - seen in the circumferential direction of movement - the rearmost region of the recess, preferably the tip of a V-shaped region of the recess, is at the same width as the largest diameter of the grinding wheel .
14. Schleifscheibe nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Ausnehmungen (3) zur Seite hin abgeschlossen sind (Fig. 8).14. Grinding wheel according to one of claims 1 to 13, characterized in that the recesses (3) are closed to the side (Fig. 8).
15. Schleifeinrichtung mit einer Schleifscheibe nach einem der Ansprüche 1 bis 14 und einer Einrichtung zur Zufuhr eines Kühl- und/oder Schmiermittels, dadurch gekennzeichnet, daß das Kühl- und/oder Schmiermittel im wesentlichen tangen- tial auf die Schleifscheibe im Schleifbereich zugeführt wird. 915. Grinding device with a grinding wheel according to one of claims 1 to 14 and a device for supplying a coolant and / or lubricant, characterized in that the coolant and / or lubricant is supplied substantially tangentially to the grinding wheel in the grinding area. 9
16. Schleifeinrichtung mit einer Schleifscheibe nach einem der Ansprüche 1 bis 14 und einer Einrichtung zur Zufuhr eines Kühl- und/oder Schmiermittels, dadurch gekennzeichnet, daß das Kühl- und/oder Schmiermittel seitlich vorzugsweise von zwei gegenüberliegenden Seiten zum Schleifbereich der Schleifscheibe zuge- führt wird.16. Grinding device with a grinding wheel according to one of claims 1 to 14 and a device for supplying a coolant and / or lubricant, characterized in that the coolant and / or lubricant is preferably laterally supplied from two opposite sides to the grinding area of the grinding wheel becomes.
17. Schleifeinrichtung mit einer Schleifscheibe nach einem der Ansprüche 1 bis 14 und einer Einrichtung zur Zufuhr eines Kühl- und/oder Schmiermittels, dadurch gekennzeichnet, daß das Kühl- und/oder Schmiermittel, vorzugsweise durch Ka- näie in der Trägerscheibe im wesentlichen radial zugeführt wird.17. Grinding device with a grinding wheel according to one of claims 1 to 14 and a device for supplying a coolant and / or lubricant, characterized in that the coolant and / or lubricant, preferably by Kääie in the carrier disk is supplied substantially radially becomes.
18. Schleifeinrichtung mit einer Schleifscheibe mit einer Trägerscheibe und einer umfangseitig darauf angeordneten Schleifschicht, wobei die Schleifschicht eine Vielzahl über den Umfang verteilter Ausnehmungen aufweist, die in einer radia- len Ansicht auf den Umfang der Schleifscheibe becher- oder schaufeiförmig ausgebildet sind, insbesondere mit einer Schleifscheibe nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß die Schleifscheibe drehrichtungsgebun- den ist, und daß die Ausnehmungen (3) im wesentlichen V-förmig ausgebildet sind, wobei in Umfangsbewegungsrichtung gesehen die Spitze der V-förmigen Ausnehmungen (3) jeweils den hintersten Punkt bildet. 18. Grinding device with a grinding wheel with a carrier wheel and a grinding layer arranged thereon on the circumferential side, wherein the grinding layer has a plurality of recesses distributed over the circumference, which are cup-shaped or bucket-shaped in a radial view of the circumference of the grinding wheel, in particular with one Grinding wheel according to one of claims 1 to 14, characterized in that the grinding wheel is bound in the direction of rotation, and in that the recesses (3) are essentially V-shaped, the tip of the V-shaped recesses (3) in each case viewed in the circumferential direction of movement forms the rearmost point.
EP99916712A 1998-04-21 1999-04-19 Grinding wheel Expired - Lifetime EP0989924B1 (en)

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AT67398 1998-04-21
PCT/AT1999/000096 WO1999054089A1 (en) 1998-04-21 1999-04-19 Grinding wheel

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BR9906371A (en) 2000-07-11
CN1130275C (en) 2003-12-10
JP2002505622A (en) 2002-02-19
ATE229869T1 (en) 2003-01-15
DE59903817D1 (en) 2003-01-30
CN1263488A (en) 2000-08-16
EP1225007A1 (en) 2002-07-24
WO1999054089A1 (en) 1999-10-28
KR20010020467A (en) 2001-03-15
US6283845B1 (en) 2001-09-04
EP0989924B1 (en) 2002-12-18
CA2294490A1 (en) 1999-10-28

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