EP0488143B1 - Method for ceramic wave foot grinding - Google Patents

Method for ceramic wave foot grinding Download PDF

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Publication number
EP0488143B1
EP0488143B1 EP91120146A EP91120146A EP0488143B1 EP 0488143 B1 EP0488143 B1 EP 0488143B1 EP 91120146 A EP91120146 A EP 91120146A EP 91120146 A EP91120146 A EP 91120146A EP 0488143 B1 EP0488143 B1 EP 0488143B1
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EP
European Patent Office
Prior art keywords
grinding
foot
station
counter
stations
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP91120146A
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German (de)
French (fr)
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EP0488143A1 (en
Inventor
Ottmar Zeitler
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Heinrich Zeidler Maschinenfabrik & Cokg GmbH
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Heinrich Zeidler Maschinenfabrik & Cokg GmbH
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    • 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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/008—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding ceramics, pottery, table ware
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories
    • B24B21/22—Accessories for producing a reciprocation of the grinding belt normal to its direction of movement
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0023—Other grinding machines or devices grinding machines with a plurality of working posts

Definitions

  • the invention relates to a method for grinding the base surfaces of ceramic articles and the like with a round, rectangular or oval shape.
  • Such a method, as described in the preamble of claim 1, is known from DE-A-36 36 606.
  • the method according to the invention is intended for processing, in particular for grinding large ceramic articles such as plates, bowls and the like, which, because of their size, are provided with a counter foot or web which is formed in addition to their normal foot.
  • This counter foot must be attached with the appropriate article size, otherwise the central area will sag downwards in the event of fire.
  • the articles had previously been passed by hand over a demolition table, where both the foot and the counter foot were ground flat on a flat surface that was covered with an abrasive. This created sharp-edged surfaces that always caused scratch marks when using the articles on tables and on the tops of the articles when stacking.
  • US-A-49 39 870 shows a grinding machine and a method for grinding in a vertical and horizontal position.
  • a grinding wheel head can be adjusted from the vertical position into the horizontal position, whereby it can be the drive for a grinding belt in both positions.
  • the grinding belt vibrates, the drive of which is connected to an eccentric wheel via a worm gear.
  • DE-A-36 36 602 also shows a device and a method for grinding the feet of ceramic products.
  • the plates, plates, bowls and terrines arrive at a four-part turnstile provided with suction cups. This turnstile is clocked at 90 °, the suction devices picking up a product, transporting it to a first belt grinding station and, after a further clock cycle, to a second belt grinding station.
  • a plane-parallel sanding is carried out with sanding belts of different sizes. A separate processing of a counter foot is not possible with this device.
  • WO-A-89/03 279 shows a circulation table which converts a rotary movement into a flatter circular movement without rotation.
  • These circulation tables with planetary orbit are used for machining round holes or recesses in metallic workpieces, where rotating grinding and polishing wheels have to follow a certain surface course.
  • the invention is therefore based on the object to provide a method for grinding ceramic articles with which all special foot shapes can be ground.
  • both the foot and the counter foot or web are ground in at least two consecutive separate stations, the counter foot always being ground in the first station and the workpiece and / or the grinding tool being at least during the grinding of the counter foot rotates eccentrically.
  • the turntable 18 also has a trough in which the water used for grinding and the grinding residues carried therein are collected.
  • the arrangement of the grinding device for the counter foot 16 in front of all other grinding stations has the purpose that the grinding residues occurring here in the center are conveyed to the outside by the rotation of the articles and the centrifugal force thus occurring during the subsequent operations.
  • Carriers 20 are provided in all grinding stations, to which the grinding tools are fastened by means of screw connections.
  • FIGS. 2 and 3 represent the station II , in which a grinding device for the counter foot 16 is provided.
  • the plates rest on workpiece holders 14 , which can be formed from metal or plastic.
  • the workpiece holder 14 is arranged here, for example, eccentrically with respect to the axis A of the shaft 24 .
  • the grinding belt 30 rests on the counter foot 16 . After each sanding operation, the sanding belt 30 advances by a length which is dependent on the length of the counter foot. For this purpose, grinding belt 30 is unwound from one spool 32 and wound onto the spool 34 which interacts with it, both of which are fastened to the carrier 20 . Also on the carrier 20 is the piston-cylinder unit 36 , with which the height for the grinding block 38 can be roughly adjusted. The height and contact pressure fine adjustment for the grinding block 38 is based on the tension spring 40 , which sits at the end of the rod 42 , at the other end of which a vibrator 44 is located as an intermediate member to the grinding block. The pneumatic one Vibrator 44 generated vibrations increase the grinding effect of the grinding belt, the contact pressure can also be varied from the adjusting screw.
  • the elastic pad 46 includes the counter foot edges during grinding, whereby the grinding belt 30 creates round transitions.
  • Fig. 3 shows the grinding station II shown in Fig. 2 with the plate 12 rotated by 180 °, so that the counter foot 16 is shown in cross section.
  • the workpiece holder 14 is attached to the axis A on the shaft 24 . The same effect would result in an eccentric position of the plate on the workpiece holder 14 .
  • Guide rollers 48 are shown on the left and right of the vibrator 44 .
  • the station III shown in Fig. 4 is almost identical to the stations IV and V.
  • This station (s) is / are set up for sanding the foot 17 , for which a sanding belt 30 transported in cycles is also used.
  • an elastic roller 50 is provided for this purpose, which presses the grinding belt 30 against the foot 17 and thus simultaneously processes the standing surface and the edges.
  • the length of the roller 50 is based on the difference in diameter of the foot 17 , which can be considerable in the case of oval and almost rectangular plates 12 .
  • the Entire grinding station with a spring, not shown, able to adapt to the changed height level.
  • roll 50 is inclined. This is done by adjusting the screw 52 .
  • the roller 50 is shown inclined to the left here. Likewise, however, the roller can also be inclined to the right if this becomes necessary by changing the direction of rotation of the workpiece holder 14 or by processing other articles with special foot shapes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Schleifen der Standflächen keramischer Artikel und dergleichen mit runder, rechteckiger oder ovaler Form. Ein solches Verfahren, wie beschrieben im Oberbegriff des Anspruchs 1, ist aus DE-A-36 36 606 bekannt.The invention relates to a method for grinding the base surfaces of ceramic articles and the like with a round, rectangular or oval shape. Such a method, as described in the preamble of claim 1, is known from DE-A-36 36 606.

Das erfindungsgemäße Verfahren ist zur Bearbeitung, insbesondere zum Schleifen großer keramischer Artikel wie Platten, Schalen und dergleichen vorgesehen, die wegen ihrer Größe mit einem zusätzlich zu ihrem normalen Fuß ausgebildeten Konterfuß oder auch Steg versehen sind. Dieser Konterfuß muß bei entsprechender Artikelgröße angebracht werden, da ansonsten beim Brand der zentrale Bereich nach unten durchsackt. Nach dem Brand hat man die Artikel bisher von Hand über einen Abrißtisch geführt, wo sowohl Fuß als auch Konterfuß auf einer ebenen Fläche, die mit einem Schleifmittel bedeckt war, plan geschliffen wurde. Dabei sind scharfkantige Flächen entstanden, die stets Kratzspuren beim Gebrauch der Artikel auf Tischen und auf den Oberseiten der Artikel beim Stapeln verursachten.The method according to the invention is intended for processing, in particular for grinding large ceramic articles such as plates, bowls and the like, which, because of their size, are provided with a counter foot or web which is formed in addition to their normal foot. This counter foot must be attached with the appropriate article size, otherwise the central area will sag downwards in the event of fire. After the fire, the articles had previously been passed by hand over a demolition table, where both the foot and the counter foot were ground flat on a flat surface that was covered with an abrasive. This created sharp-edged surfaces that always caused scratch marks when using the articles on tables and on the tops of the articles when stacking.

Aus der DE-AS 11 03 801 ist eine Maschine und ein entsprechendes Verfahren bekannt, bei dem die Füße der Teller oder ähnlicher runder Gegenstände mit entsprechenden Schleifbacken, besetzt mit Diamant- oder Korundleisten, abgerundet werden können. Dazu sind rund um eine Drehtischhohlwelle zahlreiche Zentrier- und Haltevorrichtungen auf einer Drehtischplatte angeordnet. In diese Haltevorrichtung, die über Laufrollen und ein Kurbelstück gesteuert werden, sind Teller mit ihrem Fuß nach oben weisend eingelegt. Über dem dargestellten Teller hängt an einem Ausleger der Schleifmotor. Über eine Muffe ist an dessen Welle ein aus drei Winkelhebeln bestehendes Schleifwerkzeug mit den erwähnten Schleifbacken angebracht. Durch Absenken des Auslegers und bei laufendem Antrieb legen sich die gespreizten Schleifbacken an die Außenseite des Tellerfußes. Je weiter sich der Ausleger absenkt, desto stärker neigen sich die Schleifbacken, wodurch der Fuß von außen nach innen rundgeschliffen wird. Durch diese drei dargestellten Schleifbacken können zwar kreisförmige Tellerfüße geschliffen werden, Konterfüße bzw. Stege und die Füße von nicht kreisförmigen keramischen Artikeln lassen sich damit jedoch nicht schleifen.From DE-AS 11 03 801 a machine and a corresponding method are known in which the feet of the plates or similar round objects can be rounded off with corresponding grinding jaws, studded with diamond or corundum strips. For this purpose, numerous centering and holding devices are arranged on a turntable plate around a turntable hollow shaft. In this holding device, which are controlled by rollers and a crank piece, plates are inserted with their feet pointing upwards. The grinding motor hangs on a bracket above the plate shown. A grinding tool consisting of three angle levers with the grinding jaws mentioned is attached to its shaft via a sleeve. By lowering the boom and with the drive running, the spread grinding jaws lie on the outside of the base of the plate. The further the boom descends, the more the grinding jaws tilt, causing the foot to be ground from the outside inwards. These three illustrated grinding jaws can be used to grind circular plate feet, but counter feet or webs and the feet of non-circular ceramic articles cannot be ground with them.

Die US-A-49 39 870 zeigt eine Schleifmaschine und ein Verfahren zum Schleifen in vertikaler und horizontaler Lage. Dazu läßt sich ein Schleifradkopf von der senkrechten Lage in die horizontale Lage verstellen, wobei er in beiden Stellungen Antrieb für ein Schleifband sein kann. Zur Erhöhung der Schleifleistung vibriert das Schleifband, dessen Antrieb hierzu über ein Schneckengetriebe mit einem exzentrischen Rad in Verbindung steht.US-A-49 39 870 shows a grinding machine and a method for grinding in a vertical and horizontal position. For this purpose, a grinding wheel head can be adjusted from the vertical position into the horizontal position, whereby it can be the drive for a grinding belt in both positions. To increase the grinding performance, the grinding belt vibrates, the drive of which is connected to an eccentric wheel via a worm gear.

Eine Vorrichtung und ein Verfahren zum Schleifen der Füße keramischer Erzeugnisse zeigt auch die DE-A-36 36 602. Auf einem Förderer gelangen die Teller, Platten, Schalen und Terrinen an ein vierteiliges, mit Saugern versehenes Drehkreuz. Dieses Drehkreuz taktet jeweils um 90°, wobei die Sauger ein Erzeugnis aufnehmen, in eine erste Bandschleifstation und nach einem weiteren Takt in eine zweite Bandschleifstation transportieren. In beiden Bandschleifstationen erfolgt ein planparalleler Schliff mit unterschiedlich grobkörnigen Schleifbändern. Ein gesondertes Bearbeiten eines Konterfußes ist mit dieser Vorrichtung nicht möglich.DE-A-36 36 602 also shows a device and a method for grinding the feet of ceramic products. On a conveyor, the plates, plates, bowls and terrines arrive at a four-part turnstile provided with suction cups. This turnstile is clocked at 90 °, the suction devices picking up a product, transporting it to a first belt grinding station and, after a further clock cycle, to a second belt grinding station. In both belt sanding stations, a plane-parallel sanding is carried out with sanding belts of different sizes. A separate processing of a counter foot is not possible with this device.

Aus dem Stand der Technik ist auch die Arbeitsweise eines Umlauftisches für die Bearbeitung von Metallteilen bekannt. Hierzu ist der WO-A-89/03 279 ein Umlauftisch zu entnehmen, der eine Drehbewegung in eine flachere Umlaufbewegung ohne Rotation umwandelt. Diese Umlauftische mit planetarischer Umlaufbahn kommen zur Bearbeitung runder Löcher oder Aussparungen in metallischen Werkstücken zum Einsatz, wo rotierende Schleif- und Polierräder einem bestimmten Oberflächenverlauf folgen müssen.The mode of operation of a circulation table for processing metal parts is also known from the prior art. For this purpose, WO-A-89/03 279 shows a circulation table which converts a rotary movement into a flatter circular movement without rotation. These circulation tables with planetary orbit are used for machining round holes or recesses in metallic workpieces, where rotating grinding and polishing wheels have to follow a certain surface course.

Der Erfindung liegt demnach die Aufgabe zugrunde, ein Verfahren zum Schleifen keramischer Artikel zu schaffen, mit dem sämtliche Sonder-Fußformen geschliffen werden können.The invention is therefore based on the object to provide a method for grinding ceramic articles with which all special foot shapes can be ground.

Die Aufgabe ist erfindungsgemäß dadurch gelöst, daß sowohl Fuß wie auch Konterfuß bzw. Steg in mindestens zwei aufeinanderfolgenden getrennten Stationen geschliffen werden, wobei stets in der ersten Station der Konterfuß geschliffen wird und wobei das Werkstück und/oder das Schleifwerkzeug mindestens während des Schleifens des Konterfußes exzentrisch rotiert.The object is achieved in that both the foot and the counter foot or web are ground in at least two consecutive separate stations, the counter foot always being ground in the first station and the workpiece and / or the grinding tool being at least during the grinding of the counter foot rotates eccentrically.

Nachstehend wird die Erfindung an Hand von Ausführungsbeispielen unter bezug auf Zeichnungen näher erläutert:

Fig. 1
zeigt eine Draufsicht auf die Schleifvorrichtung in Form einer Drehtischausführung
Fig. 2
zeigt eine Teilansicht durch die Schleifstation für den Konterfuß
Fig. 3
zeigt eine Teilansicht der Schleifstation für den Konterfuß 180° versetzt zur Fig. 2
Fig. 4
zeigt eine Teilansicht der Schleifstation für den Artikelfuß
Das in Fig. 1 dargestellte Beispiel betrifft eine Naßschleifmaschine mit Drehtischausführung. Die Anzahl der einzelnen Stationen, die eine Schleifmaschine aufweist, richtet sich nach den gestellten Anforderungen. Im dargestellten Beispiel sind sechs Stationen I, II, III, IV, V, VI vorgesehen. Bei Station I werden die hier als Platten 12 dargestellten Artikel entweder von Hand oder automatisch von einem nicht gezeichneten Greifer oder Sauger auf den Werkzeughalter 14 aufgelegt. Station II ist mit einem Schleifwerkzeug für den Konterfuß 16 ausgestattet. Der Konterfuß 16 ist in allen Darstellungen in Form eines Steges erkenntlich, der sich auf der jeweiligen Längsachse an der Unterseite innerhalb des Fußes der Platte erstreckt. Andere Konterfußformen sind bekannt. In den Stationen III, IV, V erfolgt der Schliff des Fußes 17. Die in den Stationen III, IV, V verwendeten Schleifmittel weisen zumeist unterschiedliche Körnungen auf, wobei in Station V die feinste Körnung verwendet wird. Die letzte Station VI auf dem Drehtisch 18 ist die Abnahmestation. Ebenso wie bei Station I können hier die Platten 12 von nicht dargestellten Greifern entnommen und gegebenenfalls weiteren Vorrichtungen zugeführt werden.The invention is explained in more detail below on the basis of exemplary embodiments with reference to drawings:
Fig. 1
shows a plan view of the grinding device in the form of a rotary table design
Fig. 2
shows a partial view through the grinding station for the counter foot
Fig. 3
shows a partial view of the grinding station for the counter foot 180 ° offset to FIG. 2nd
Fig. 4
shows a partial view of the grinding station for the article foot
The example shown in Fig. 1 relates to a wet grinding machine with a rotary table design. The number of individual stations that a grinding machine has depends on the requirements. In the example shown, six stations I, II, III, IV, V, VI are provided. At station I , the articles shown here as plates 12 are placed on the tool holder 14 either by hand or automatically by a gripper or suction device (not shown). Station II is equipped with a grinding tool for the counter foot 16 . The counter foot 16 can be seen in all representations in the form of a web which extends on the respective longitudinal axis on the underside within the base of the plate. Other counterfoot shapes are known. In stations III, IV, V the foot 17 is ground. The abrasives used in stations III, IV, V mostly have different grain sizes, the finest grain size being used in station V. The last station VI on the turntable 18 is the acceptance station. As with station I , the plates 12 can be removed from grippers (not shown) and optionally fed to further devices.

Der Drehtisch 18, dessen Stationenzahl erhöht werden kann für eventuelle Polier- oder Reinigungsvorgänge, hat auch eine Wanne, in der das zum Schleifen verwendete Wasser und die darin mitgeführten Schleifrückstände gesammelt werden. Die Anordnung der Schleifvorrichtung für den Konterfuß 16 vor allen weiteren Schleifstationen hat den Zweck, daß die hier im Zentrum anfallenden Schleifrückstände durch die Rotation der Artikel und der damit auftretenden Fliehkraft während der nachfolgenden Arbeitsgänge nach außen gefördert werden. In allen Schleifstationen sind Träger 20 vorgesehen, an die die Schleifwerkzeuge mittels Schraubverbindungen befestigt sind.The turntable 18 , the number of stations of which can be increased for any polishing or cleaning operations, also has a trough in which the water used for grinding and the grinding residues carried therein are collected. The arrangement of the grinding device for the counter foot 16 in front of all other grinding stations has the purpose that the grinding residues occurring here in the center are conveyed to the outside by the rotation of the articles and the centrifugal force thus occurring during the subsequent operations. Carriers 20 are provided in all grinding stations, to which the grinding tools are fastened by means of screw connections.

Die Fig. 2 und 3 stellen die Station II dar, in der eine Schleifvorrichtung für den Konterfuß 16 vorgesehen ist. Die Platten liegen auf Werkstückhaltern 14 auf, die aus Metall oder Kunststoff geformt sein können. Für den festen Sitz der Platten 12 auf den Werkstückhaltern 14 sorgt entweder Vakuum, das über die Leitung 22 der Welle 24 im Raum 26 erzeugt wird, oder über beispielsweise einen möglicherweise elastischen Rand 28, der die Platten hält. Der Werkstückhalter 14 ist hier beispielsweise gegenüber der Achse A der Welle 24 exzentrisch angeordnet.2 and 3 represent the station II , in which a grinding device for the counter foot 16 is provided. The plates rest on workpiece holders 14 , which can be formed from metal or plastic. Either vacuum, which is generated via the line 22 of the shaft 24 in the space 26 , or via, for example, a possibly elastic edge 28 which holds the plates, ensures that the plates 12 are firmly seated on the workpiece holders 14 . The workpiece holder 14 is arranged here, for example, eccentrically with respect to the axis A of the shaft 24 .

Während des Schleifens liegt das Schleifband 30 auf dem Konterfuß 16 auf. Nach jedem Schleifvorgang rückt das Schleifband 30 um eine Länge, die abhängig von der Länge des Konterfußes ist, nach. Dazu wird Schleifband 30 von der einen Spule 32 abgewickelt und auf die mit ihr zusammenwirkende Spule 34 aufgewickelt, die beide am Träger 20 befestigt sind. Ebenfalls am Träger 20 sitzt die Kolbenzylindereinheit 36, mit der die Höhe für den Schleifklotz 38 grob einstellbar ist. Die höhen- und anpreßdruckmäßige Feineinstellung für den Schleifklotz 38 geht von der Zugfeder 40 aus, die am Ende der Stange 42 sitzt, an derem anderen Ende ein Vibrator 44 als Zwischenglied zum Schleifklotz sitzt. Die vom pneumatischen Vibrator 44 erzeugten Schwingungen verstärken die Schleifwirkung des Schleifbands, deren Anpreßdruck auch von der Einstellschraube aus variiert werden kann. Die elastische Auflage 46 umfaßt beim Schleifen die Konterfußränder, wodurch das Schleifband 30 runde Übergänge schafft.During grinding, the grinding belt 30 rests on the counter foot 16 . After each sanding operation, the sanding belt 30 advances by a length which is dependent on the length of the counter foot. For this purpose, grinding belt 30 is unwound from one spool 32 and wound onto the spool 34 which interacts with it, both of which are fastened to the carrier 20 . Also on the carrier 20 is the piston-cylinder unit 36 , with which the height for the grinding block 38 can be roughly adjusted. The height and contact pressure fine adjustment for the grinding block 38 is based on the tension spring 40 , which sits at the end of the rod 42 , at the other end of which a vibrator 44 is located as an intermediate member to the grinding block. The pneumatic one Vibrator 44 generated vibrations increase the grinding effect of the grinding belt, the contact pressure can also be varied from the adjusting screw. The elastic pad 46 includes the counter foot edges during grinding, whereby the grinding belt 30 creates round transitions.

Fig. 3 zeigt die in Fig. 2 dargestellte Schleifstation II mit der um 180 ° gedrehten Platte 12, so daß der Konterfuß 16 im Querschnitt dargestellt ist. Um zu verhindern, daß das Schleifband 30 einen Punkt auf dem Konterfuß 16 hinterläßt, der nahezu unbearbeitet ist und von ungenügender Relativbewegung zwischen Konterfuß und Schleifband herrühren würde, ist der Werkstückhalter 14 versetzt zur Achse A auf der Welle 24 angebracht. Den gleichen Effekt würde eine exzentrische Lage der Platte auf dem Werkstückhalter 14 bewirken. Links und rechts des Vibrators 44 sind jeweils Führungsrollen 48 dargestellt.Fig. 3 shows the grinding station II shown in Fig. 2 with the plate 12 rotated by 180 °, so that the counter foot 16 is shown in cross section. To prevent the sanding belt 30 from leaving a point on the counter foot 16 which is almost unprocessed and would result from insufficient relative movement between the counter foot and the sanding belt, the workpiece holder 14 is attached to the axis A on the shaft 24 . The same effect would result in an eccentric position of the plate on the workpiece holder 14 . Guide rollers 48 are shown on the left and right of the vibrator 44 .

Die in Fig. 4 dargestellte Station III ist nahezu baugleich mit den Stationen IV und V. Diese Station/en ist/sind zum Schleifen des Fußes 17 eingerichtet, wofür ebenfalls ein taktmäßig transportiertes Schleifband 30 eingesetzt wird.The station III shown in Fig. 4 is almost identical to the stations IV and V. This station (s) is / are set up for sanding the foot 17 , for which a sanding belt 30 transported in cycles is also used.

Auf Grund der zu schleifenden ovalen Fläche ist hierzu eine elastische Rolle 50 vorgesehen, die das Schleifband 30 an den Fuß 17 drückt und somit die Standfläche wie auch die Kanten zugleich bearbeitet. Die Länge der Rolle 50 orientiert sich am Durchmesserunterschied des Fußes 17, der bei ovalen und nahezu rechteckigen Platten 12 erheblich sein kann. Zum Ausgleich von Höhenunterschieden einzelner Platten 12 untereinander ist die gesamte Schleifstation mit einer nicht dargestellten Feder in der Lage, sich an das geänderte Höhenniveau anzugleichen. Um Schleifspuren auf dem Artikelboden innerhalb des Fußes zu vermeiden, neigt man die Rolle 50. Dies geschieht durch das Verstellen der Schraube 52. Die Rolle 50 ist hier nach links geneigt dargestellt. Ebenso kann die Rolle jedoch auch nach rechts geneigt sein, falls dies durch Änderung der Drehrichtung des Werkstückhalters 14 bzw. durch die Bearbeitung anderer Artikel mit besonderen Fußformen notwendig wird.On the basis of the oval surface to be ground, an elastic roller 50 is provided for this purpose, which presses the grinding belt 30 against the foot 17 and thus simultaneously processes the standing surface and the edges. The length of the roller 50 is based on the difference in diameter of the foot 17 , which can be considerable in the case of oval and almost rectangular plates 12 . To compensate for differences in height between individual plates 12 is the Entire grinding station with a spring, not shown, able to adapt to the changed height level. To avoid grinding marks on the article floor inside the foot, roll 50 is inclined. This is done by adjusting the screw 52 . The roller 50 is shown inclined to the left here. Likewise, however, the roller can also be inclined to the right if this becomes necessary by changing the direction of rotation of the workpiece holder 14 or by processing other articles with special foot shapes.

Claims (1)

  1. Method of grinding the supporting surfaces of ceramic articles or similar products having a round, rectangular or oval shape, whose supporting surfaces are formed by a foot (17) and an opposing foot (16) or a web, respectively, in a grinding machine having a plurality of individual stations (II, III, IV, V) comprising a grinding tool and a workpiece holder (14),
    characterized in
    that said foot (17) as well as said opposing foot (16) or said web, respectively, are ground in at least two separate stations in succession (II, III, IV, V), with said opposing foot being always ground in the first station (II) and with said workpiece and or said grinding tool rotating eccentrically at least during the grinding of said opposing foot (16).
EP91120146A 1990-11-29 1991-11-26 Method for ceramic wave foot grinding Expired - Lifetime EP0488143B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4038031A DE4038031A1 (en) 1990-11-29 1990-11-29 METHOD AND DEVICE FOR GRINDING THE STANDS OF CERAMIC ARTICLES
DE4038031 1990-11-29

Publications (2)

Publication Number Publication Date
EP0488143A1 EP0488143A1 (en) 1992-06-03
EP0488143B1 true EP0488143B1 (en) 1995-04-12

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EP91120146A Expired - Lifetime EP0488143B1 (en) 1990-11-29 1991-11-26 Method for ceramic wave foot grinding

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DE (2) DE4038031A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400559A1 (en) * 1994-01-11 1995-07-13 Voit Michael Gmbh Method and device for grinding and / or polishing, in particular of foot parts of glazed and fired clay or porcelain
DE4413896C1 (en) * 1994-04-21 1995-02-09 Lippert Masch Stahlbau J Machine for grinding the brim (rim) of hollow vessels
DE102010023896A1 (en) * 2010-06-16 2011-12-22 Maschinen- Und Stahlbau Julius Lippert Gmbh & Co. Kg Non-rotationally symmetric ceramic article e.g. cup, edge grinding method, involves executing relative movement between grinding head and ceramic article as linear or arc shaped back and forth movement transverse to longitudinal extent
ITMI20111392A1 (en) * 2011-07-26 2013-01-27 Ghidini Felice Italo E C Srl MACHINE FOR DEBURRING AND / OR GRINDING AND / OR GLAZING AND / OR CLEANING AND / OR RINSE OF PIECES
CN103522155A (en) * 2013-10-28 2014-01-22 江苏大唐机械有限公司 Reed cutter grinding machine
DE102017101115A1 (en) 2017-01-20 2018-07-26 Lippert Gmbh & Co. Kg Grinding device for grinding flat abrasive material
CN109822429B (en) * 2019-04-08 2020-03-06 中国石油大学(华东) Vibration polishing machine for preparing metal electron back scattering diffraction sample
CN116604425B (en) * 2023-07-19 2023-10-13 常州埃森诺精密模具有限公司 High-strength solar photovoltaic support connecting piece production device and production process

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DE3636602A1 (en) * 1985-11-29 1987-06-04 Ve Wissenschaftlich Tech Betri Grinding installation for fine-ceramic products
WO1989003279A1 (en) * 1987-10-13 1989-04-20 Extrude Hone Corporation Orbital table for machine tools

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US2741076A (en) * 1951-02-14 1956-04-10 Shenaugo Pottery Company Ware foot abrading machine
DE1103801B (en) * 1953-04-20 1961-03-30 Otto Assmann Machine for grinding and polishing the feet and edges of plates, cups, bowls, etc. like
US4939870A (en) * 1989-04-14 1990-07-10 Wang Tien Wang Vertical/horizontal double-way grinding type abrasive belt grinder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3636602A1 (en) * 1985-11-29 1987-06-04 Ve Wissenschaftlich Tech Betri Grinding installation for fine-ceramic products
WO1989003279A1 (en) * 1987-10-13 1989-04-20 Extrude Hone Corporation Orbital table for machine tools

Also Published As

Publication number Publication date
DE4038031A1 (en) 1992-06-04
DE59105170D1 (en) 1995-05-18
DE4038031C2 (en) 1992-11-12
EP0488143A1 (en) 1992-06-03

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