EP1343614A1 - Arrangement for detachably securing a grinding wheel or group of grinding wheels on a wheel spindle - Google Patents

Arrangement for detachably securing a grinding wheel or group of grinding wheels on a wheel spindle

Info

Publication number
EP1343614A1
EP1343614A1 EP01271989A EP01271989A EP1343614A1 EP 1343614 A1 EP1343614 A1 EP 1343614A1 EP 01271989 A EP01271989 A EP 01271989A EP 01271989 A EP01271989 A EP 01271989A EP 1343614 A1 EP1343614 A1 EP 1343614A1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
spindle
holding shaft
wheel
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
EP01271989A
Other languages
German (de)
French (fr)
Other versions
EP1343614B1 (en
Inventor
Fritz Kötting
Ansgar Schmitz
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.)
Pro Laser Weco GmbH
Original Assignee
Pro Laser Weco GmbH
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 Pro Laser Weco GmbH filed Critical Pro Laser Weco GmbH
Publication of EP1343614A1 publication Critical patent/EP1343614A1/en
Application granted granted Critical
Publication of EP1343614B1 publication Critical patent/EP1343614B1/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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools

Definitions

  • the invention relates to an arrangement for the detachable fastening of a grinding wheel or a grinding wheel package to a grinding spindle, in particular for a spectacle lens edge grinding machine, as described, for example, in DE 195 27 222 C2 by the same applicant.
  • Grinding wheels or grinding wheel packages are mostly releasably attached to a grinding spindle in order to be able to replace them, for example if they are worn out or if they are to be replaced with regard to different machining processes.
  • Grinding disks for spectacle lens edge cutting machines are generally provided with a cylindrical area and a groove area in order to first pre-process a lens to be shaped with the cylindrical area and then to use the groove area to grind a roof facet onto the circumference of the shaped lens.
  • grinding wheel packages consisting of three grinding wheels are used, of which one grinding wheel for processing plastic glasses, one cylindrical grinding wheel for standard grinding of glasses made of silicate glass and one grinding wheel with a facet groove for fine machining and grinding a facet are provided.
  • the grinding spindle and the grinding wheels are arranged on the eyeglass rim grinding machine in a grinding chamber that can be closed on all sides, since the abrasion that occurs during grinding should not be released to the outside and, as a rule, a cooling lubricant is sprayed into the grinding area between the grinding wheel and the spectacle lens, which is also sprayed should not get outside.
  • This grinding chamber is kept as small as possible, but often a splash guard is also closely arranged around the grinding wheels, which only leaves the grinding area free and has areas designed as tactile shoes on which the raw glass and / or the shape-ground spectacle lens is placed in order to close it measured.
  • This sleeve carries and centers the grinding wheels, while the clamping with the grinding spindle is carried out by means of a holding disc, the diameter of which is larger than the diameter of the sleeve and which can be screwed to the grinding wheel holding shaft and thereby clamps the grinding wheels with the grinding spindle.
  • the invention is based on the problem of facilitating the assembly and disassembly of grinding wheels or grinding wheel packages on grinding spindles in tight spaces in the axial direction and to ensure improved concentricity.
  • an arrangement for releasably attaching a grinding wheel or a grinding wheel package to a grinding spindle, in particular for an eyeglass lens grinding machine is proposed in which, according to the invention, an axially displaceably arranged in a coaxial bore of the grinding spindle and arranged at least by the width of a grinding wheel in the grinding spindle retractable grinding wheel holding shaft is present, on which a grinding wheel or a grinding wheel package sits directly and without play, and at the free end of which a holding wheel can be detachably fastened, with clamping elements between the grinding spindle and the grinding wheel holding shaft axially tightening and loosening the grinding wheel or grinding wheel package between the grinding spindle and the holding disc and pulling in the grinding wheel holding shaft by at least the width of a grinding wheel in the Ensure grinding spindle inside.
  • the grinding wheel or the grinding wheel package sits directly and without play on the grinding wheel holding shaft, so that the double tolerance between the grinding wheel holding shaft and the sleeve according to the prior art is eliminated.
  • the clamping of the grinding wheel or grinding wheel package between the grinding spindle and the holding disc is released by moving the grinding wheel holding shaft within the grinding spindle in the direction of the grinding wheel or grinding wheel package, after which the holding wheel is removed from the grinding wheel holding shaft without the aid of a tool can lose weight. Thereafter, the grinding wheel holding shaft is shifted so far in the opposite direction within the grinding spindle that its free end completely releases the grinding wheel or at least one grinding wheel of a grinding wheel package and this can be removed from the grinding spindle area from the grinding chamber without axial displacement.
  • the procedure for inserting a grinding wheel or a grinding wheel package is reversed in an analogous manner.
  • the new grinding wheel or grinding wheel package is positioned in the grinding chamber in the area of the grinding spindle with the grinding wheel holding shaft retracted, the grinding wheel holding shaft is moved out of the grinding spindle, passed through the locating hole in the grinding wheel or in the grinding wheel package, and the holding wheel is at the free end of the grinding wheel holding shaft attached, and the grinding wheel holding shaft is moved in the opposite direction to brace the grinding wheel or the grinding wheel package between the grinding spindle and the holding wheel.
  • the holding disc can be screwed to the free end of the grinding wheel holding shaft, for example by means of a push-through screw or by means of a threaded pin connected to the holding disc, without a special tool being required to loosen this screw connection, since the grinding wheel or the grinding wheel package is clamped between the grinding spindle and the holding disc is made by axially displacing the grinding wheel holding shaft and the screwing of the holding disc can be freely rotated after the tension has been released.
  • the holding wheel can also be connected to the free end of the grinding wheel holding shaft in the manner of a bayonet connection.
  • the holding wheel can be released from the grinding wheel holding shaft without the aid of a tool, while it is impossible to release it under tension.
  • the clamping elements between the grinding spindle and the grinding wheel holding shaft can consist of a threaded connection between the grinding wheel holding shaft and the grinding spindle.
  • the grinding wheel holding shaft which is provided with an external thread, can either be screwed directly into a threaded hole in the grinding spindle, or the grinding wheel holding shaft can have a threaded hole for a cap screw which is supported on the grinding spindle via a collar bushing.
  • the grinding wheel holding shaft screwed into the grinding spindle in the bore of the grinding spindle can be turned by hand using a suitable handle, a tool then possibly being required for clamping.
  • a cap screw to move and tighten the grinding wheel holding shaft for example, a key for the hexagon socket can be used.
  • an electrical rotary drive can be arranged between the grinding spindle and the grinding wheel holding shaft or the head screw.
  • the drawing shows a section of a portion of an eyeglass lens grinding machine in cross section with a grinding wheel package on a grinding spindle.
  • a grinding wheel package consisting of a grinding wheel 1 for plastic with a grinding ring 2 made of metal, in which diamond abrasives are bound metallic, a coarse grinding wheel for silicate glass with a slip ring 4, also made of metal, in which diamond abrasives are bound metallic, and a fine grinding wheel 5 with an identical one Slip ring 6, which has a facet groove 7 for grinding a roof facet on the circumference of a shape-ground spectacle lens, sits on a grinding wheel holding shaft 13, which is closely fitted into a bore 11 of the grinding spindle 9.
  • the grinding wheel holding shaft 13 has a threaded bore 14 and coaxially with it a cylindrical bore 15 with a somewhat larger diameter. Starting from the free end, diametrically opposed, angled slots 16 are machined into the grinding wheel holding shaft 13 for a bayonet holder described below.
  • a cap screw 17 with a head 18 with an internal hexagon is screwed into the threaded bore 14.
  • the head 18 is supported by a flange bushing 19 on the grinding spindle 9, into which the flange bushing 19 is glued.
  • a holding wheel 20 with its cylindrical extension 21, on which there are radial pins 22, is inserted into the bore 15 such that the radial pins 22 on the cylindrical extension 21 into the angled slots 16 arrive and form the bayonet connection already mentioned by rotation.
  • a compression spring 23 is supported between the cylindrical extension 21 and a shoulder at the end of the bore 15 in the grinding wheel holding shaft 13. If the head screw 17 is now turned in the sense that the grinding wheel holding shaft 13 is drawn into the bore 11 of the grinding spindle 9, the holding wheel 20 comes to rest against the grinding wheel package 1, 3, 5 and braces the latter via a support wheel 12 with the grinding spindle 9.
  • the head screw 17 is turned in the opposite direction until it reaches the position shown. Thereafter, the holding disc 20 can be easily removed. If the grinding wheel holding shaft 13 is then pulled so far into the grinding spindle 9 by turning the cap screw 17 again in the direction that also serves for clamping that the end of the grinding wheel holding shaft 13 is led out of the receiving bore of the grinding wheel 5, this can be done in the radial direction Remove from the area of the grinding wheel holding shaft 13.
  • the grinding wheel holding shaft 13 can also be pulled into the grinding spindle 9 to such an extent that the grinding wheel package 1, 3, 5 can be removed as a whole in the radial direction.
  • the grinding wheel holding shaft 13 can also be screwed directly into a corresponding threaded hole in the grinding spindle 9.
  • the grinding wheel holding shaft 13 is preferably out of the grinding spindle 9 up to the region of the collar bushing 19 shown in the embodiment with a head screw 17 led out and can be provided here with a handwheel with which the grinding wheel holding shaft 13 can be rotated in the grinding spindle 9.
  • the cap screw 17 can be designed as a threaded spindle which can be rotated by means of an electromotive drive.
  • a similar drive can also be provided in the embodiment in which the grinding wheel holding shaft 13 is screwed directly into the grinding spindle 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention relates to an arrangement for detachably securing a grinding wheel or a group of grinding wheels (1, 3, 5) on a wheel spindle (9), particularly on a machine for grinding the edges of spectacle lenses. Said inventive arrangement comprises an axially displaceable retaining shaft for securing the grinding wheel (13) arranged in a coaxial bore (11) on said grinding wheel, a retaining disk (20) is detachably secured on the free end of the shaft and clamping elements (17, 18, 19) disposed between the wheel spindle and the shaft for axially clamping and detaching the grinding wheel or the group of wheels between the wheel spindle and the retaining disk.

Description

"Anordnung zum lösbaren Befestigen einer Schleifscheibe oder eines Schleifscheibenpakets an einer Schleifspindel""Arrangement for the detachable fastening of a grinding wheel or a grinding wheel package to a grinding spindle"
Die Erfindung betrifft eine Anordnung zum lösbaren Befestigen einer Schleifscheibe oder eines Schleifscheibenpakets an einer Schleifspindel, insbesondere für eine Brillenglasrandschleifinaschine, wie sie beispielsweise in der DE 195 27 222 C2 derselben Anmelderin beschrieben ist.The invention relates to an arrangement for the detachable fastening of a grinding wheel or a grinding wheel package to a grinding spindle, in particular for a spectacle lens edge grinding machine, as described, for example, in DE 195 27 222 C2 by the same applicant.
Schleifscheiben oder Schleifscheibenpakete werden überwiegend an einer Schleifspindel lösbar befestigt, um sie auswechseln zu können, wenn sie beispielsweise abgenutzt sind oder wenn sie im Hinblick auf unterschiedliche Bearbeitungsvorgänge ausgetauscht werden sollen.Grinding wheels or grinding wheel packages are mostly releasably attached to a grinding spindle in order to be able to replace them, for example if they are worn out or if they are to be replaced with regard to different machining processes.
Schleifscheiben für BrillenglasrandscUeifinaschinen sind in der Regel mit einem zylindrischen Bereich und einem Nutbereich versehen, um ein formzuschleifendes Brillenglas zunächst mit dem zylindrischen Bereich vorzubearbeiten und anschließend mittels des Nutbereichs eine Dachfacette an den Umfang des formbearbeiteten Brillenglases anzuschleifen. Häufig werden Schleifscheibenpakete aus beispielsweise drei Schleifscheiben eingesetzt, von denen eine Schleifscheibe zum Bearbeiten von Kunststoffgläsern, eine zylindrische Schleifscheibe zum Norschleifen von Brillengläsern aus Silikatglas und eine Schleifscheibe mit einer Facettennut zum Feinbearbeiten und Anschleifen einer Facette vorgesehen sind.Grinding disks for spectacle lens edge cutting machines are generally provided with a cylindrical area and a groove area in order to first pre-process a lens to be shaped with the cylindrical area and then to use the groove area to grind a roof facet onto the circumference of the shaped lens. Frequently, grinding wheel packages consisting of three grinding wheels are used, of which one grinding wheel for processing plastic glasses, one cylindrical grinding wheel for standard grinding of glasses made of silicate glass and one grinding wheel with a facet groove for fine machining and grinding a facet are provided.
Die Schlei spindel und die Schleifscheiben sind an der BriUenglasrandscMei&iaschine in einer allseits verschließbaren Schleifkammer angeordnet, da der beim Schleifen entstehende Abrieb nicht nach außen gelangen soll und in der Regel ein Kühl-Schmiermittel in den Schleifbereich zwischen der Schleifscheibe und dem Brillenglas gespritzt wird, das ebenfalls nicht nach außen gelangen soll. Diese Schleifkammer wird möghchst klein gehalten, jedoch ist häufig zusätzlich noch ein Spritzschutz eng um die Schleifscheiben herum angeordnet, der nur den Schleifbereich frei läßt und als Tastschuhe ausgebildete Bereiche aufweist, auf die das Rohglas und/oder das formgeschliffene Brillenglas aufgesetzt wird, um es zu vermessen.The grinding spindle and the grinding wheels are arranged on the eyeglass rim grinding machine in a grinding chamber that can be closed on all sides, since the abrasion that occurs during grinding should not be released to the outside and, as a rule, a cooling lubricant is sprayed into the grinding area between the grinding wheel and the spectacle lens, which is also sprayed should not get outside. This grinding chamber is kept as small as possible, but often a splash guard is also closely arranged around the grinding wheels, which only leaves the grinding area free and has areas designed as tactile shoes on which the raw glass and / or the shape-ground spectacle lens is placed in order to close it measured.
Aus diesem Aufbau einer üblichen Brillenglasrandschleifinaschine ergibt sich, daß in der Schleifkammer beengte Platzverhältnisse herrschen, die das Auswechseln von Schleifscheiben oder Schleifscheibenpaketen sehr erschweren, da die Schleifscheiben bei den bekannten Brillenglasrandschleifmaschinen mit der Schleifspindel in der Weise verbunden werden, daß auf einen mit der Schleif spindel einstückig verbundener Schleifscheibenhalteschaft kleineren Durchmessers als die Schleifspindel eine Hülse aufgesetzt wird, deren Länge etwas kleiner als die Breite der Schleifscheibe oder des Schleifscheibenpakets ist. Diese Hülse trägt die Schleifscheiben und zentriert sie, während das Verspannen mit der Schleifspindel mittels einer Haltescheibe erfolgt, deren Durchmesser größer als der Durchmesser der Hülse ist und die sich mit dem Schleifscheibenhalteschaft verschrauben läßt und dadurch die Schleifscheiben mit der Schleifspindel verspannt.From this construction of a conventional spectacle lens edge grinding machine it follows that there is limited space in the grinding chamber, which makes the replacement of grinding wheels or grinding wheel packages very difficult, since the grinding wheels in the known spectacle lens edge grinding machines are connected to the grinding spindle in such a way that a spindle with the grinding wheel integrally connected grinding wheel holder shaft of smaller diameter than the grinding spindle, a sleeve is placed, the length of which is somewhat smaller than the width of the grinding wheel or grinding wheel package. This sleeve carries and centers the grinding wheels, while the clamping with the grinding spindle is carried out by means of a holding disc, the diameter of which is larger than the diameter of the sleeve and which can be screwed to the grinding wheel holding shaft and thereby clamps the grinding wheels with the grinding spindle.
Hieraus ergibt sich, daß zum Demontieren der Schleifscheiben genügend Platz in der Schleifkammer sein muß, um sie einzeln oder gemeinsam vom Schleifscheibenhalteschaft abziehen und aus der Schleifkammer entnehmen zu können.It follows from this that there must be enough space in the grinding chamber for dismantling the grinding wheels in order to be able to pull them individually or together from the grinding wheel holding shaft and to remove them from the grinding chamber.
Des weiteren muß auch genügend Platz in der Schleiflcammer vorhanden sein, um an die Schraub Verbindung für die Haltescheibe einen geeigneten Schlüssel zum Spannen und Lösen der Verbindung ansetzen zu können. Schließlich ist auch noch zwischen dem Schleifscheibenhalteschaft und der Hülse sowie der Hülse und der Schleifscheibe bzw. dem Schleifscheibenpaket eine Doppeltoleranz vorhanden, die auf die Rundlaufgenauigkeit einen ne •'güa"tiven Einfluß hat.Furthermore, there must also be enough space in the grinding chamber in order to be able to attach a suitable key to the screw connection for the holding disk for tensioning and releasing the connection. Finally, also a double tolerance between the grinding wheel support shaft and the sleeve and the sleeve and the grinding wheel or the grinding wheel packet is present, to the concentricity a ne • 'güa "has tive influence.
Ist der eingangs erwähnte Spritzschutz mit den Tastschuhen vorhanden, muß dieser vor der Demontage der Schleifscheibe bzw. des Schleifscheibenpakets ebenfalls demontiert werden.If the splash guard mentioned at the beginning with the tactile shoes is present, it must also be dismantled before dismantling the grinding wheel or grinding wheel package.
Das Auswechseln einer Schleifscheibe oder eines Schleifscheibenpakets ist bei den bekannten Brillenglasrandschleifmaschinen daher zeitaufwendig und erfordert eine gewisse Geschicklichkeit.The replacement of a grinding wheel or a grinding wheel package is therefore time-consuming in the known spectacle lens edge grinding machines and requires a certain skill.
Der Erfindung liegt das Problem zugrunde, die Montage und die Demontage von Schleifscheiben oder Schleifscheibenpaketen an Schleifspindeln bei engen Raumverhältnissen in axialer Richtung zu erleichtern und eine verbesserte Rundlaufgenauigkeit zu gewährleisten.The invention is based on the problem of facilitating the assembly and disassembly of grinding wheels or grinding wheel packages on grinding spindles in tight spaces in the axial direction and to ensure improved concentricity.
Ausgehend von dieser Aufgabenstellung wird eine Anordnung zum lösbaren Befestigen einer Schleifscheibe oder eines Schleifscheibenpakets an einer Schleifspindel, insbesondere für eine Brillenglasrandschleifinaschine, vorgeschlagen, bei der erfindungsgemäß ein axial verschiebbar in einer koaxialen Bohrung der Schleif spindel eng eingepaßt angeordneter und um mindestens die Breite einer Schleifscheibe in die Schleifspindel einziehbarer Schleifscheibenhalteschaft vorhanden ist, auf dem eine Schleifscheibe oder ein Schleifscheibenpaket direkt und spielfrei sitzt, und an dessen freien Ende sich eine Haltescheibe lösbar befestigen läßt, wobei Spannelemente zwischen der Schleifspindel und dem Schleifscheibenhalteschaft das axiale Verspannen und Lösen der Schleifscheibe oder des Schleifscheibenpakets zwischen der Schleifspindel und der Haltescheibe und das Einziehen des Schleifscheibenhalteschafts um mindestens die Breite einer Schleifscheibe in die Schleifspindel hinein gewährleisten.Based on this task, an arrangement for releasably attaching a grinding wheel or a grinding wheel package to a grinding spindle, in particular for an eyeglass lens grinding machine, is proposed in which, according to the invention, an axially displaceably arranged in a coaxial bore of the grinding spindle and arranged at least by the width of a grinding wheel in the grinding spindle retractable grinding wheel holding shaft is present, on which a grinding wheel or a grinding wheel package sits directly and without play, and at the free end of which a holding wheel can be detachably fastened, with clamping elements between the grinding spindle and the grinding wheel holding shaft axially tightening and loosening the grinding wheel or grinding wheel package between the grinding spindle and the holding disc and pulling in the grinding wheel holding shaft by at least the width of a grinding wheel in the Ensure grinding spindle inside.
Bei der erfmdungsgemäßen Anordnung sitzt die Schleifscheibe bzw. das Schleifscheibenpaket direkt und spielfrei auf dem Schleifscheibenhalteschaft, so daß die Doppeltoleranz zwischen dem Schleifscheibenhalteschaft und der Hülse gemäß dem Stand der Technik entfällt.In the arrangement according to the invention, the grinding wheel or the grinding wheel package sits directly and without play on the grinding wheel holding shaft, so that the double tolerance between the grinding wheel holding shaft and the sleeve according to the prior art is eliminated.
Um eine Schleifscheibe oder ein Schleifscheibenpaket auszuwechseln, wird die Verspannung der Schleifscheibe bzw. des Schleifscheibenpakets zwischen der Schleifspindel und der Haltescheibe durch Verschieben des Schleifscheibenhalteschafts innerhalb der Schleifspindel in Richtung der Schleifscheibe bzw. des Schleifscheibenpakets gelöst, wonach sich die Haltescheibe ohne Zuhilfenahme eines Werkzeugs vom Schleifscheibenhalteschaft abnehmen läßt. Hiernach wird der Schleifscheibenhalteschaft innerhalb der Schleifspindel in entgegengesetzter Richtung so weit verschoben, daß sein freies Ende die Schleifscheibe bzw. wenigstens eine Schleifscheibe eines Schleifscheibenpakets vollkommen freigibt und sich diese ohne axiales Verschieben aus dem Bereich der Schleifspindel aus der Schleifkammer herausnehmen läßt. Zum Einsetzen einer Schleifscheibe oder eines Schleifscheibenpakets wird in analoger Weise umgekehrt verfahren. Hierzu wird die neue Schleifscheibe bzw. das Schleifscheibenpaket bei eingezogenem Schleifscheibenhalteschaft im Bereich der Schleifspindel in der Schleifkammer positioniert, der Schleifscheibenhalteschaft wird aus der Schleifspindel herausgefahren, durch die Aufhahmebohrung in der Schleifscheibe bzw. im Schleifscheibenpaket hindurch gefuhrt, die Haltescheibe wird am freien Ende des Schleifscheibenhalteschafts befestigt, und der Schleifscheibenhalteschaft wird in entgegengesetzter Richtung zum Verspannen der Schleifscheibe bzw. des Schleifscheibenpakets zwischen der Schleifspindel und der Haltescheibe bewegt.In order to replace a grinding wheel or a grinding wheel package, the clamping of the grinding wheel or grinding wheel package between the grinding spindle and the holding disc is released by moving the grinding wheel holding shaft within the grinding spindle in the direction of the grinding wheel or grinding wheel package, after which the holding wheel is removed from the grinding wheel holding shaft without the aid of a tool can lose weight. Thereafter, the grinding wheel holding shaft is shifted so far in the opposite direction within the grinding spindle that its free end completely releases the grinding wheel or at least one grinding wheel of a grinding wheel package and this can be removed from the grinding spindle area from the grinding chamber without axial displacement. The procedure for inserting a grinding wheel or a grinding wheel package is reversed in an analogous manner. For this purpose, the new grinding wheel or grinding wheel package is positioned in the grinding chamber in the area of the grinding spindle with the grinding wheel holding shaft retracted, the grinding wheel holding shaft is moved out of the grinding spindle, passed through the locating hole in the grinding wheel or in the grinding wheel package, and the holding wheel is at the free end of the grinding wheel holding shaft attached, and the grinding wheel holding shaft is moved in the opposite direction to brace the grinding wheel or the grinding wheel package between the grinding spindle and the holding wheel.
Die Haltescheibe kann mit dem freien Ende des Schleifscheibenhalteschafts, beispielsweise mittels einer Durchsteckschraube oder mittels eines mit der Haltescheibe verbundenen Gewindestifts, verschraubbar sein, ohne daß zum Lösen dieser Schraub Verbindung ein besonderes Werkzeug erforderlich ist, da das Verspannen der Schleifscheibe oder des Schleifscheibenpakets zwischen der Schleifspindel und der Haltescheibe durch axiales Verschieben des Schleifscheibenhalteschafts erfolgt und sich die Verschraubung der Haltescheibe nach Aufhebung der Verspannung frei drehen läßt.The holding disc can be screwed to the free end of the grinding wheel holding shaft, for example by means of a push-through screw or by means of a threaded pin connected to the holding disc, without a special tool being required to loosen this screw connection, since the grinding wheel or the grinding wheel package is clamped between the grinding spindle and the holding disc is made by axially displacing the grinding wheel holding shaft and the screwing of the holding disc can be freely rotated after the tension has been released.
Die Haltescheibe kann auch gemäß einer anderen Ausführungsform mit dem freien Ende des Schleifscheibenhalteschafts nach Art einer Bajonett Verbindung verbunden sein. Auch in diesem Fall ist ein Lösen der Haltescheibe vom Schleifscheibenhalteschaft ohne Zuhilfenahme eines Werkzeugs möglich, während ein Lösen unter Verspannung unmöglich ist. Die Spannelemente zwischen der Schleifspindel und dem Schleifscheibenhalteschaft können aus einer Gewindeverbindung zwischen dem Schleifscheibenhalteschaft und der Schleifspindel bestehen. Hierfür kann der mit einem Außengewinde versehene Schleifscheibenhalteschaft entweder direkt in eine Gewindebohrung in der Schleifspindel eingeschraubt sein, oder der Schleifscheibenhalteschaft kann eine Gewindebohrung für eine sich über eine Bundbuchse an der Schleifspindel abstützende Kopfschraube aufweisen.According to another embodiment, the holding wheel can also be connected to the free end of the grinding wheel holding shaft in the manner of a bayonet connection. In this case too, the holding wheel can be released from the grinding wheel holding shaft without the aid of a tool, while it is impossible to release it under tension. The clamping elements between the grinding spindle and the grinding wheel holding shaft can consist of a threaded connection between the grinding wheel holding shaft and the grinding spindle. For this purpose, the grinding wheel holding shaft, which is provided with an external thread, can either be screwed directly into a threaded hole in the grinding spindle, or the grinding wheel holding shaft can have a threaded hole for a cap screw which is supported on the grinding spindle via a collar bushing.
Das Drehen des in die Schleifspindel eingeschraubten Schleifscheibenhalteschafts in der Bohrung der Schleifspindel kann mittels einer geeigneten Handhabe von Hand erfolgen, wobei zum Festspannen dann ggf. ein Werkzeug erforderlich ist. Bei Verwendung einer Kopfschraube zum Verschieben und Verspannen des Schleifscheibenhalteschafts läßt sich beispielsweise ein Schlüssel für Innensechskant einsetzen.The grinding wheel holding shaft screwed into the grinding spindle in the bore of the grinding spindle can be turned by hand using a suitable handle, a tool then possibly being required for clamping. When using a cap screw to move and tighten the grinding wheel holding shaft, for example, a key for the hexagon socket can be used.
Um das Ein- und Ausschrauben des Schleifscheibenhalteschafts in der Bohrung der Schleifspindel bzw. der Kopfschraube zu beschleunigen und auf Spannwerkzeuge verzichten zu können, kann ein beispielsweise elektrischer Drehantrieb zwischen der Schleifspindel und dem Schleifscheibenhalteschaft bzw. der Kopfschraube angeordnet sein.In order to accelerate the screwing in and unscrewing of the grinding wheel holding shaft in the bore of the grinding spindle or the head screw and to be able to dispense with clamping tools, for example an electrical rotary drive can be arranged between the grinding spindle and the grinding wheel holding shaft or the head screw.
Ebenso ist es möglich, als Spannelemente eine Hydraulik- oder Pneumatik-Kolben-Zylinder- Einheit zwischen dem Schleifscheibenhalteschaft und der Schleifspindel vorzusehen, die sowohl die schnelle axiale Verschiebung des Schleifscheibenhalteschafts in der Bohrung der Schleifspindel als auch das Verspannen bewirkt. Mit dieser Anordnung ist die schnellste Betätigungsmöglichkeit gegeben.It is also possible to provide a hydraulic or pneumatic piston-cylinder unit between the grinding wheel holding shaft and the grinding spindle as the clamping elements, which causes both the rapid axial displacement of the grinding wheel holding shaft in the bore of the grinding spindle and the bracing. With this arrangement the fastest possible operation is given.
Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert.The invention is explained below with reference to an embodiment shown in the drawing.
Die Zeichnung zeigt einen ausschnittsweisen Bereich einer Brillenglasrandschleifinaschine im Querschnitt mit einem Schleifscheibenpaket an einer Schleifspindel.The drawing shows a section of a portion of an eyeglass lens grinding machine in cross section with a grinding wheel package on a grinding spindle.
Von einer Brillenglasrandschleifmaschine ist nur ein Gehäusehals 8 dargestellt, in dem eine Schleifspindel 9 mittels eines Wälzlagerpaars 10 gelagert ist.Of a spectacle lens edge grinding machine, only one housing neck 8 is shown, in which a grinding spindle 9 is mounted by means of a pair of roller bearings 10.
Ein Schleifscheibenpaket aus einer Schleifscheibe 1 für Kunststoff mit einem Schleifring 2 aus Metall, in dem Diamantschleifmittel metallisch gebunden sind, einer Grobschleifscheibe für Silikatglas mit einem Schleifring 4, ebenfalls aus Metall, in dem Diamantschleifmittel metallisch gebunden sind, und einer Feinschleifscheibe 5 mit einem gleich ausgebildeten Schleifring 6, der eine Facettennut 7 zum Anschleifen einer Dachfacette an dem Umfang eines formgeschliffenen Brillenglases aufweist, sitzt auf einem Schleifscheibenhalteschaft 13, der in eine Bohrung 11 der Schleifspindel 9 eng eingepaßt ist. Der Schleifscheibenhalteschaft 13 weist eine Gewindebohrung 14 und koaxial dazu eine zylindrische Bohrung 15 mit einem etwas größeren Durchmesser auf. Vom freien Ende ausgehend sind in den Schleifscheibenhalteschaft 13 diametral gegenüberliegende, abgewinkelte Schlitze 16 für eine nachstehend beschriebene Bajonetthalterung eingearbeitet.A grinding wheel package consisting of a grinding wheel 1 for plastic with a grinding ring 2 made of metal, in which diamond abrasives are bound metallic, a coarse grinding wheel for silicate glass with a slip ring 4, also made of metal, in which diamond abrasives are bound metallic, and a fine grinding wheel 5 with an identical one Slip ring 6, which has a facet groove 7 for grinding a roof facet on the circumference of a shape-ground spectacle lens, sits on a grinding wheel holding shaft 13, which is closely fitted into a bore 11 of the grinding spindle 9. The grinding wheel holding shaft 13 has a threaded bore 14 and coaxially with it a cylindrical bore 15 with a somewhat larger diameter. Starting from the free end, diametrically opposed, angled slots 16 are machined into the grinding wheel holding shaft 13 for a bayonet holder described below.
In die Gewindebohrung 14 ist eine Kopfschraube 17 mit einem Kopf 18 mit Innensechskant eingeschraubt. Der Kopf 18 stützt sich über eine Bundbuchse 19 an der Schleifspindel 9 ab, in die die Bundbuchse 19 eingeklebt ist.A cap screw 17 with a head 18 with an internal hexagon is screwed into the threaded bore 14. The head 18 is supported by a flange bushing 19 on the grinding spindle 9, into which the flange bushing 19 is glued.
Zum Verspannen des Schleifscheibenpakets 1, 3, 5 mit der Schleifspindel 9 wird eine Haltescheibe 20 mit ihrem zylindrischen Fortsatz 21, an dem sich Radialzapfen 22 befinden, in die Bohrung 15 so eingesetzt, daß die Radialzapfen 22 am zylindrischen Fortsatz 21 in die abgewinkelten Schlitze 16 gelangen und durch Drehung die bereits erwähnte Bajonettverbindung bilden. Eine Druckfeder 23 stützt sich zwischen dem zylindrischen Fortsatz 21 und einem Ansatz am Ende der Bohrung 15 in dem Schleifscheibenhalteschaft 13 ab. Wird nun die Kopfschraube 17 in dem Sinne gedreht, daß der Schleifscheibenhalteschaft 13 in die Bohrung 11 der Schleifspindel 9 hineingezogen wird, kommt die Haltescheibe 20 zur Anlage an das Schleifscheibenpaket 1, 3, 5 und verspannt dieses über eine Stützscheibe 12 mit der Schleifspindel 9.To clamp the grinding wheel package 1, 3, 5 with the grinding spindle 9, a holding wheel 20 with its cylindrical extension 21, on which there are radial pins 22, is inserted into the bore 15 such that the radial pins 22 on the cylindrical extension 21 into the angled slots 16 arrive and form the bayonet connection already mentioned by rotation. A compression spring 23 is supported between the cylindrical extension 21 and a shoulder at the end of the bore 15 in the grinding wheel holding shaft 13. If the head screw 17 is now turned in the sense that the grinding wheel holding shaft 13 is drawn into the bore 11 of the grinding spindle 9, the holding wheel 20 comes to rest against the grinding wheel package 1, 3, 5 and braces the latter via a support wheel 12 with the grinding spindle 9.
Zum Lösen wird die Kopfschraube 17 in umgekehrter Richtung gedreht, bis sie in die dargestellte Stellung gelangt. Danach läßt sich die Haltescheibe 20 problemlos abnehmen. Wird dann der Schleifscheibenhalteschaft 13 durch erneutes Drehen der Kopfschraube 17 in die Richtung, die auch zum Spannen dient, so weit in die Schleifspindel 9 hineingezogen, daß das Ende des Schleifscheibenhalteschafts 13 aus der Aufhahmebohrung der Schleifscheibe 5 herausgeführt ist, läßt sich diese in radialer Richtung aus dem Bereich des Schleifscheibenhalteschafts 13 entfernen.To loosen the head screw 17 is turned in the opposite direction until it reaches the position shown. Thereafter, the holding disc 20 can be easily removed. If the grinding wheel holding shaft 13 is then pulled so far into the grinding spindle 9 by turning the cap screw 17 again in the direction that also serves for clamping that the end of the grinding wheel holding shaft 13 is led out of the receiving bore of the grinding wheel 5, this can be done in the radial direction Remove from the area of the grinding wheel holding shaft 13.
Der Schleifscheibenhalteschaft 13 läßt sich auch so weit in die Schleifspindel 9 hineinziehen, daß sich das Schleifscheibenpaket 1, 3, 5 als Ganzes in radialer Richtung entnehmen läßt.The grinding wheel holding shaft 13 can also be pulled into the grinding spindle 9 to such an extent that the grinding wheel package 1, 3, 5 can be removed as a whole in the radial direction.
Zum Einsetzen eines Schleifscheibenpakets 1, 3, 5 wird in umgekehrter Richtung verfahren.To insert a grinding wheel package 1, 3, 5, proceed in the opposite direction.
Statt den Schleifscheibenhalteschaft 13 mittels einer Kopfschraube 17 in der Bohrung 11 der Schleifspindel 9 zu bewegen, kann der Schleifscheibenhalteschaft 13 auch direkt in eine entsprechende Gewindebohrung der Schleifspindel 9 eingeschraubt sein. In diesem Fall ist der Schleifscheibenhalteschaft 13 vorzugsweise bis in den Bereich der bei der Ausführungsform mit Kopfschraube 17 dargestellten Bundbuchse 19 aus der Schleifspindel 9 herausgeführt und kann hier mit einem Handrad versehen sein, mit dem sich der Schleifscheibenhalteschaft 13 in der Schleifspindel 9 drehen läßt.Instead of moving the grinding wheel holding shaft 13 by means of a cap screw 17 in the bore 11 of the grinding spindle 9, the grinding wheel holding shaft 13 can also be screwed directly into a corresponding threaded hole in the grinding spindle 9. In this case, the grinding wheel holding shaft 13 is preferably out of the grinding spindle 9 up to the region of the collar bushing 19 shown in the embodiment with a head screw 17 led out and can be provided here with a handwheel with which the grinding wheel holding shaft 13 can be rotated in the grinding spindle 9.
Zur Beschleunigung eines Auswechselvorganges eines Schleifscheibenpakets 1, 3, 5 oder einer Schleifscheibe kann die Kopfschraube 17 als Gewindespindel ausgebildet sein, die sich mittels eines elektromotorischen Antriebes drehen läßt. Ein ähnlicher Antrieb kann auch bei der Ausführungsform, bei der der Schleifscheibenhalteschaft 13 direlct in die Schleifspindel 9 eingeschraubt ist, vorgesehen sein.To accelerate a replacement process of a grinding wheel package 1, 3, 5 or a grinding wheel, the cap screw 17 can be designed as a threaded spindle which can be rotated by means of an electromotive drive. A similar drive can also be provided in the embodiment in which the grinding wheel holding shaft 13 is screwed directly into the grinding spindle 9.
Des weiteren ist es auch möglich, zwischen der Schleifspindel 9 und dem Schleifscheibenhalteschaft 13 eine Hydrauük- oder Pneumatik-Kolben-Zylinder-Einheit anzuordnen, die sowohl das schnelle Verschieben des Schleifscheibenhalteschafts 13 gegenüber der Schleifspindel 9 als auch das Verspannen der Schleifscheiben 1, 3, 5 bewirkt. Furthermore, it is also possible to arrange a hydraulic or pneumatic piston-cylinder unit between the grinding spindle 9 and the grinding wheel holding shaft 13, which unit not only moves the grinding wheel holding shaft 13 quickly relative to the grinding spindle 9 but also braces the grinding wheels 1, 3, 5 causes.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Anordnung zum lösbaren Befestigen einer Schleifscheibe oder eines Schleifscheibenpakets (1, 3, 5) an einer Schleifspindel (9), insbesondere für eine Brillenglasrandschleifmaschine, mit1. Arrangement for releasably attaching a grinding wheel or a grinding wheel package (1, 3, 5) to a grinding spindle (9), in particular for an eyeglass lens grinding machine
- einem axial verschiebbar in einer koaxialen Bohrung (11) der Schleifspindel (9) eng eingepaßt angeordneten und um mindestens die Breite einer Schleifscheibe (1, 3, 5) in die Schleifspindel (9) einziehbaren Schleifscheibenhalteschaft (13), auf dem- An axially displaceable in a coaxial bore (11) of the grinding spindle (9) arranged tightly and by at least the width of a grinding wheel (1, 3, 5) in the grinding spindle (9) retractable grinding wheel holder shaft (13) on which
- eine Schleifscheibe oder ein Schleifscheibenpaket (1, 3, 5) direlct und spielfrei sitzt- A grinding wheel or a grinding wheel package (1, 3, 5) sits directly and without play
- einer am freien Ende des Schleifscheibenhalteschafts (13) lösbar befestigbaren Haltescheibe (20) und- At the free end of the grinding wheel holding shaft (13) releasably attachable holding disc (20) and
- Spannelementen (17, 18, 19) zwischen der Schleifspindel (9) und dem Schleifscheibenhalteschaft (13) zum axialen Verspannen und Lösen der Schleifscheibe oder des Schleifscheibenpakets (1, 3, 5) zwischen der Schleifspindel (9) und der Haltescheibe (20) und zum Einziehen des Schleifscheibenhalteschafts (13) um mindestens die Breite einer Schleifscheibe (1, 3, 5) in die Schleifspindel (9) hinein.- Clamping elements (17, 18, 19) between the grinding spindle (9) and the grinding wheel holding shaft (13) for axially tightening and loosening the grinding wheel or the grinding wheel package (1, 3, 5) between the grinding spindle (9) and the holding wheel (20) and for pulling the grinding wheel holding shaft (13) into the grinding spindle (9) by at least the width of a grinding wheel (1, 3, 5).
2. Anordnung nach Anspruch 1, bei der die Haltescheibe (20) mit dem freien Ende des Schleifscheibenhalteschafts (13) verschraubbar ist.2. Arrangement according to claim 1, wherein the holding disc (20) with the free end of the grinding wheel holding shaft (13) can be screwed.
3. Anordnung nach Anspruch 1, bei der die Haltescheibe (20) einen mit dem freien Ende des Schleifscheibenhalteschafts (13) nach Art einer Bajonettverbindung (16, 22) zusammenwirkenden Fortsatz (21) aufweist.3. Arrangement according to claim 1, wherein the holding disc (20) has a with the free end of the grinding wheel holding shaft (13) in the manner of a bayonet connection (16, 22) cooperating extension (21).
4. Anordnung nach einem der Ansprüche 1 bis 3, mit einer Schraub Verbindung (14, 17, 18, 19) zwischen dem Schleifscheibenhalteschaft (13) und der Schleifspindel (9).4. Arrangement according to one of claims 1 to 3, with a screw connection (14, 17, 18, 19) between the grinding wheel holding shaft (13) and the grinding spindle (9).
5. Anordnung nach Anspruch 4, bei der der Schleifscheibenhalteschaft (13) eine Gewindebohrung (14) für eine sich über eine Bundbuchse (19) an der Schleifspindel (9) abstützende Kopfschraube (17) aufweist.5. Arrangement according to claim 4, in which the grinding wheel holding shaft (13) has a threaded bore (14) for a head screw (17) which is supported on the grinding spindle (9) via a flange bushing (19).
6. Anordnung nach Anspruch 4 oder 5 mit einem Drehantrieb zwischen dem Schleifscheibenhalteschaft (13) und der Schleifspindel (9). Anordnung nach einem der Ansprüche 1 bis 3, bei der die Spannelemente aus einer Hydraulik- oder Pneumatik-Kolben-Zylinder-Einheit zwischen dem Schleifscheibenhalteschaft (13) und der Schleifspindel (9) bestehen. 6. Arrangement according to claim 4 or 5 with a rotary drive between the grinding wheel holding shaft (13) and the grinding spindle (9). Arrangement according to one of claims 1 to 3, in which the clamping elements consist of a hydraulic or pneumatic piston-cylinder unit between the grinding wheel holding shaft (13) and the grinding spindle (9).
EP01271989A 2000-12-22 2001-11-30 Arrangement for detachably securing a grinding wheel or group of grinding wheels on a wheel spindle Expired - Lifetime EP1343614B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10064163 2000-12-22
DE10064163A DE10064163C2 (en) 2000-12-22 2000-12-22 Arrangement for releasably attaching a grinding wheel or a grinding wheel package to a grinding spindle
PCT/EP2001/014002 WO2002051588A1 (en) 2000-12-22 2001-11-30 Arrangement for detachably securing a grinding wheel or group of grinding wheels on a wheel spindle

Publications (2)

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EP1343614A1 true EP1343614A1 (en) 2003-09-17
EP1343614B1 EP1343614B1 (en) 2004-10-13

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EP01271989A Expired - Lifetime EP1343614B1 (en) 2000-12-22 2001-11-30 Arrangement for detachably securing a grinding wheel or group of grinding wheels on a wheel spindle

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US (1) US6966824B2 (en)
EP (1) EP1343614B1 (en)
DE (1) DE10064163C2 (en)
ES (1) ES2230237T3 (en)
WO (1) WO2002051588A1 (en)

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Publication number Publication date
US6966824B2 (en) 2005-11-22
DE10064163A1 (en) 2002-07-11
ES2230237T3 (en) 2005-05-01
DE10064163C2 (en) 2003-04-17
US20040063389A1 (en) 2004-04-01
WO2002051588A1 (en) 2002-07-04
EP1343614B1 (en) 2004-10-13

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