EP0860236B1 - Centrifugal polishing machine - Google Patents

Centrifugal polishing machine Download PDF

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Publication number
EP0860236B1
EP0860236B1 EP98102679A EP98102679A EP0860236B1 EP 0860236 B1 EP0860236 B1 EP 0860236B1 EP 98102679 A EP98102679 A EP 98102679A EP 98102679 A EP98102679 A EP 98102679A EP 0860236 B1 EP0860236 B1 EP 0860236B1
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EP
European Patent Office
Prior art keywords
grinding machine
container
machine according
gap
ceramic
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EP98102679A
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German (de)
French (fr)
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EP0860236A3 (en
EP0860236A2 (en
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Helmut Gegenheimer
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/108Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work involving a sectioned bowl, one part of which, e.g. its wall, is stationary and the other part of which is moved, e.g. rotated

Definitions

  • the invention relates to a centrifugal vibratory grinding machine according to the preamble of claim 1.
  • Centrifugal vibratory grinding machines are used for surface processing especially of smaller parts and Workpieces use together with grinding tools and optionally a liquid processing agent in be moved in a container.
  • a centrifugal slide grinding machine an upwardly opening, shell-like bottom part, that is rotated around a vertical axis.
  • Above the bottom part is a cylindrical container top arranged stationary, with its lower edge on the upper edge of the bottom part with the interposition of a Seal rests.
  • the bottom part rotates the workpieces to be treated are in the bottom part acted radially outward until it reaches the Hit the inner wall of the stationary upper part of the container, at which they are slowed down.
  • Inflowing Workpieces are subject to a radially rotating workpiece movement one that intensive grinding causes.
  • the transition area between the top of the rotating Bottom part and the bottom of the stationary The upper part of the container is very susceptible to wear. It is therefore, attempts have been made between these two Components effective seal as slip ring seal form, the at the bottom part and / or the Ceramic slip ring arranged in the upper part of the container consists. In this way, the seal can Reduce wear that occurs, however Ceramic rings of larger diameter very expensive and it Another problem arises that the diameter of the Ceramic rings and thus the diameter of the upper part of the container Technically limited to a maximum of approx. 50 cm is, so that such a centrifugal vibratory grinding machine in their volume and also in their work performance is subject to severe restrictions. It is has been attempted to make a ceramic ring out of several ceramic ones Put together ring segments, kicked however, problems with sealing.
  • DE-PS 44 28 817 is between the two Component effective seal through a hardened steel ring on the bottom part and a felt ring on the top of the container educated.
  • the felt ring can be used Incorporation of fine grinding media into the felt, see above arises at the contact surface between the two ring seals a gap that is not due to the felt seal can be more balanced. This and the wear due to the friction on the contact surfaces between Container top and bottom part then leads to the smallest parts can no longer be edited.
  • the gap width on the inside is therefore not adjustable, because the floor and wall sections are only vertical Direction are adjustable relative to each other.
  • the invention is therefore based on the object Centrifugal slide grinder to create the most reliable works, has a long service life at which an absolutely dry grinding is possible and in addition, the width of the gap to the size of the Abrasive material is customizable.
  • the stated task is at a generic centrifugal vibratory grinding machine the characterizing features of claim 1 solved.
  • the hard ceramic parts which are preferably ring-shaped, are designed as rings, it is ensured that even if the upper part of the container is tilted No welding of the boundary surfaces to the lower part of the container of the bottom and top of the container, but permanent smooth rotatability the upper part is ensured relative to the lower part.
  • there is a finite gap between the ceramic parts is.
  • the gap size will usually be such that they in the range of the particle size or slightly below this lies so that particles do not pass through the gap from the Can penetrate outside of the grinding machine.
  • the ceramic rings By forming the ceramic rings on the lower part of the container and on the upper face of the container bottom part it also ensures that in case of intrusion a very small abrasive particle in the gap, whereby the above-mentioned edging can only be done due to the relative rotational movement between the upper and lower part the particle is crushed, but not the above Damage can occur, such as in Metal would be used.
  • the gap width to the size of the abrasive particles used are adjusted.
  • the Gap has a size of 0.05-0.5 mm and in particular, that the gap has a size of approximately 0.3 mm, it should of course be noted that the gap not larger than the (minimum) dimensions of the abrasive particles should be.
  • the adjustability of the gap can be different Be done, for example by washers or the like.
  • An extremely preferred embodiment but provides that the gap can be adjusted using adjusting screws is, in particular the set screws on Circumference of the upper part of the container and one carrying it Carrying part are arranged.
  • the inner wall of the upper part of the container is in her lower end section tapers radially inwards.
  • the upper part of the container a relatively large one over most of its height Can have a diameter that is due to the conical Design of the lower end area into one reduced lower margin with a much smaller diameter.
  • the diameter of the bottom is the necessary Determines the size or diameter of the seal, can with the centrifugal slide grinding machine according to the invention one-piece slip rings made of ceramic use find, although the container top is a relatively large Volume and thus a high work rate.
  • the between the two inner walls of the bottom part and Angle of the container upper part kept small be, so that from a deflection of the to be processed Workpieces resulting load is low.
  • the inner walls of container top and bottom part in the area of the gap.
  • the inner wall of the bottom part goes smoothly into the inner wall of the upper part of the container about.
  • the contact surface between the lower edge of the upper part of the container and the top of the bottom part are different Alternatives conceivable.
  • the gap clearly under one angle deviating from a right angle to the Inner walls of the top and bottom part of the container is aligned, in particular the gap essentially aligned horizontally or perpendicular to the axis of rotation is. This causes an axial movement of the upper part of the container or bottom part evenly on the contact surface.
  • the gap below at a right angle to the inner walls of the upper part of the container and floor part is aligned.
  • the outer part the bottom part of the container is preferably made of aluminum or an aluminum alloy. The same can be done for the top of the container should be the case.
  • the lining consists preferably of polyurethane.
  • the centrifugal slide grinding machine 10 has a on a machine carrier, not shown attached outer, housing-like support member 11. At the Support part 11 is rotatable via a bearing 11a Container bottom part rotatable about its drive axis 12a stored. The container bottom part 12 is on the axis 12a driven by a drive, not shown.
  • a container upper part 13 Sitting on the upper edge 11b of the support member 11 with the support member 11 connected, a container upper part 13.
  • the container upper part is with the support member 11 via adjusting screws 14 connected and by means of these screws in his Height adjustable in the direction of the axis of rotation D.
  • the screws 14 with their heads 16 each on one flange arranged radially on the outside of the container upper part 13 13d on which the screws 14 with their threaded bolts project through.
  • the container upper part 13 has a metallic outer part 13a on the inside with a coating 13b is provided.
  • the outer part 13a has one circular cylindrical shape and is on its inner wall tapers radially inwards.
  • the coating 13b essentially follows this conical configuration, see above that the lower edge of the container upper part 13 one smaller inner diameter than the one above it essentially circular cylindrical section of the upper part of the container 13 has.
  • an annular ceramic part 17 At the lower end of the container upper part 13 is attached an annular ceramic part 17, the front 17a with the inner wall 13f of the coating 13b of the container upper part 13 is aligned. In the front area the ceramic part 17 has a downward nose 17b.
  • the bottom part 12 also has a metallic outer part 12a and a coating 12b.
  • a metallic outer part 12a In the top of the container 13 adjacent area has the outer part 12a of the bottom part 12 a flared Inner wall 12c.
  • the outer part 12a of the bottom part 12 is also provided with a coating 12b and the inner wall 12f essentially follows the inner wall 12c of the outer part 12a.
  • the bottom part 12 In the top of the container 13 facing area is the bottom part 12 also provided with an annular ceramic part 18, whose inner wall 18a with the inner wall 17a - and also the inner wall 12f of the coating 12b - is aligned.
  • an adjustable slot S with a finite one Slot width formed by the size of the used Abrasive material depends, but preferably in is of the order of 0.3 mm.
  • the top runs 18b and the underside of the nose 17b essentially horizontally and therefore at an angle not equal to 90 ° the inner walls 13f, 17a, 18a, 12f.
  • FIG. 3 corresponds essentially that of Fig. 2.
  • a difference is that the Top 18b of the ceramic part 18 from the outside inwards is angled upwards.
  • the bottom the nose 17b is parallel to the front or inner area of the upper side 18b of the ceramic part 18.
  • the slot S is thus in the embodiment of FIG. 3 aligned so that it is at right angles to the Forms inner walls 13f, 17a, 18a, 12f.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Food-Manufacturing Devices (AREA)
  • Centrifugal Separators (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Description

Die Erfindung betrifft eine Fliehkraft-Gleitschleifmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a centrifugal vibratory grinding machine according to the preamble of claim 1.

Fliehkraft-Gleitschleifmaschinen finden für die Oberflächenbearbeitung insbesondere von kleineren Teilen und Werkstücken Verwendung, die zusammen mit Schleifkörpern und gegebenenfalls einem flüssigen Verfahrensmittel in einem Behälter bewegt werden. Wie die DE 44 28 817 C1 zeigt, besitzt eine bekannte Fliehkraft-Gleitschleifmaschine ein nach oben öffnendes, schalenartiges Bodenteil, das um eine vertikale Achse drehangetrieben ist. Oberhalb des Bodenteils ist ein zylinderförmiges Behälteroberteil stationär angeordnet, das mit seinem unteren Rand auf dem oberen Rand des Bodenteils unter Zwischenschaltung einer Dichtung aufliegt. Wenn das Bodenteil in Drehung versetzt wird, werden die zu behandelnden Werkstücke in dem Bodenteil radial nach außen beaufschlagt, bis sie auf die Innenwandung des stationären Behälteroberteils auftreffen, an der sie abgebremst werden. Durch nachströmende Werkstücke stellt sich eine radial umlaufende Werkstückbewegung ein, die eine intensive Schleifbearbeitung bewirkt. Centrifugal vibratory grinding machines are used for surface processing especially of smaller parts and Workpieces use together with grinding tools and optionally a liquid processing agent in be moved in a container. Like DE 44 28 817 C1 shows, has a known centrifugal slide grinding machine an upwardly opening, shell-like bottom part, that is rotated around a vertical axis. Above the bottom part is a cylindrical container top arranged stationary, with its lower edge on the upper edge of the bottom part with the interposition of a Seal rests. When the bottom part rotates the workpieces to be treated are in the bottom part acted radially outward until it reaches the Hit the inner wall of the stationary upper part of the container, at which they are slowed down. By inflowing Workpieces are subject to a radially rotating workpiece movement one that intensive grinding causes.

Der Übergangsbereich zwischen dem oberen Rand des drehenden Bodenteils und dem unteren Rand des stationären Behälteroberteils ist sehr verschleißanfällig. Es ist deshalb versucht worden, die zwischen diesen beiden Bauteilen wirksame Dichtung als Schleifringdichtung auszubilden, wobei der am Bodenteil und/oder der am Behälteroberteil angeordnete Schleifring aus Keramik besteht. Auf diese Weise läßt sich zwar der in der Dichtung auftretende Verschleiß herabsetzen, jedoch sind Keramikringe größeren Durchmessers sehr teuer und es tritt das weitere Problem auf, daß der Durchmesser der Keramikringe und somit der Durchmesser des Behälteroberteils herstellungstechnisch auf maximal ca. 50cm beschränkt ist, so daß eine derartige Fliehkraft-Gleitschleifmaschine in ihrem Volumen und auch in ihrer Arbeitsleistung starken Beschränkungen unterliegt. Es ist versucht worden, einen Keramikring aus mehreren keramischen Ringsegmenten zusammenzusetzen, dabei traten jedoch Schwierigkeiten bezüglich der Abdichtung auf.The transition area between the top of the rotating Bottom part and the bottom of the stationary The upper part of the container is very susceptible to wear. It is therefore, attempts have been made between these two Components effective seal as slip ring seal form, the at the bottom part and / or the Ceramic slip ring arranged in the upper part of the container consists. In this way, the seal can Reduce wear that occurs, however Ceramic rings of larger diameter very expensive and it Another problem arises that the diameter of the Ceramic rings and thus the diameter of the upper part of the container Technically limited to a maximum of approx. 50 cm is, so that such a centrifugal vibratory grinding machine in their volume and also in their work performance is subject to severe restrictions. It is has been attempted to make a ceramic ring out of several ceramic ones Put together ring segments, kicked however, problems with sealing.

Bei der DE-PS 44 28 817 wird die zwischen den beiden Bauteilen wirksame Dichtung durch einen gehärteten Stahlring auf dem Bodenteil und einen Filzring am Behälteroberteil gebildet. Mittels Schrauben wird dabei der gewünschte Anpreßdruck zwischen der weichen Ringdichtung aus Filz- oder Vliesmaterial und dem Stahlring hergestellt. Nutzt sich der Filzring beispielsweise durch Einarbeiten feiner Schleifmedien in den Filz ab, so entsteht an der Kontaktfläche zwischen den beiden Ringdichtungen ein Spalt, der durch die Filzdichtung nicht mehr ausgeglichen werden kann. Dies und der Verschleiß aufgrund der Reibung an den Kontaktflächen zwischen Behälterober- und Bodenteil führt dann dazu, daß Kleinstteile nicht mehr bearbeitet werden können. In DE-PS 44 28 817 is between the two Component effective seal through a hardened steel ring on the bottom part and a felt ring on the top of the container educated. With the screws Desired contact pressure between the soft ring seal made of felt or fleece material and the steel ring. For example, the felt ring can be used Incorporation of fine grinding media into the felt, see above arises at the contact surface between the two ring seals a gap that is not due to the felt seal can be more balanced. This and the wear due to the friction on the contact surfaces between Container top and bottom part then leads to the smallest parts can no longer be edited.

Bei den bekannten Fliehkraft-Gleitschleifmaschinen mit Gleitringdichtungen, bei denen die Dichtungen bildenden Teile von Behälter-Bodenteil und -Oberteil elastisch gegeneinander gedrückt werden, erfolgt eine Schmierung mittels eines Schmierfluids, das dabei in das Innere des Behälterteils eindringen kann.In the known centrifugal vibratory grinding machines with Mechanical seals in which the seals form Parts of the container base and top part elastic are pressed against each other, lubrication takes place by means of a lubricating fluid that enters the inside of the Can penetrate part of the container.

Bei manchen Schleifvorgängen ist es wünschenswert oder notwendig, eine absolute Trockenheit im Inneren der Schleifmaschine sicherzustellen, die bei den bekannten, mit einem Fluid arbeitenden Schleifmaschinen nicht gegeben ist.For some grinding operations it is desirable or necessary an absolute dryness inside the Ensure grinding machine, which is known in the not available with a fluid grinding machine is.

Die DE 42 14 060 A1 zeigt eine gattungsgemäße Fliehkraft-Gleitschleifmaschine mit einem winkelförmig ausgebildeten Spalt, der zum Inneren hin vertikal ausgerichtet ist.DE 42 14 060 A1 shows a centrifugal vibratory grinding machine of the generic type with an angularly shaped Gap that is vertically aligned towards the inside.

Die Spaltbreite auf der Innenseite ist daher nicht einstellbar, da Boden- und Wandteil nur in senkrechter Richtung relativ zueinander verstellbar sind.The gap width on the inside is therefore not adjustable, because the floor and wall sections are only vertical Direction are adjustable relative to each other.

Die DE 36 04 619 A zeigt eine Fliehkraft-Gleitschleifmaschine mit über seine gesamte Breite zur Drehachse geneigt ausgebildeten einstellbaren Spalt.DE 36 04 619 A shows a centrifugal vibratory grinding machine with over its entire width to the axis of rotation inclined adjustable gap.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Fliehkraft-Gleitschleifmaschine zu schaffen, die zuverlässig arbeitet, eine hohe Standzeit aufweist, bei der ein absolut trockenes Schleifen möglich ist und bei der darüber hinaus die Breite des Spaltes an die Größe des Schleifmaterials anpaßbar ist.The invention is therefore based on the object Centrifugal slide grinder to create the most reliable works, has a long service life at which an absolutely dry grinding is possible and in addition, the width of the gap to the size of the Abrasive material is customizable.

Erfindungsgemäß wird die genannte Aufgabe bei einer gattungsgemäßen Fliehkraft-Gleitschleifmaschine durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. According to the invention, the stated task is at a generic centrifugal vibratory grinding machine the characterizing features of claim 1 solved.

Durch die harten Keramikteile, die vorzugsweise ringförmig, also als Ringe ausgebildet sind, wird sichergestellt, daß auch bei einem Verkanten von Behälter-Oberteil zu Behälter-Unterteil kein Verschweißen der Begrenzungsflächen von Behälter-Bodenteil und -Oberteil erfolgt, sondern dauerhaft eine gleichmäßige Drehbarkeit des Oberteils relativ zum Unterteil sichergestellt ist. In bevorzugter Ausgestaltung ist dabei vorgesehen, daß zwischen den Keramikteilen ein endlicher Spalt vorhanden ist. Die Spaltgröße wird in der Regel derart sein, daß sie im Bereich der Teilchengröße bzw. etwas unter dieser liegt, so daß Teilchen nicht durch den Spalt aus dem Inneren der Schleifmaschine nach außen dringen können. Durch die Ausbildung der Keramikringe am unteren Behälter-Oberteil und an der oberen Stirnseite des Behälter-Bodenteils wird auch sichergestellt, daß bei Eindringen eines sehr kleinen Schleifmittelteilchens in den Spalt, wodurch das oben erwähnte Kanten erfolgen kann, lediglich durch die relative Drehbewegung zwischen Ober- und Unterteil das Teilchen zermalmt wird, aber nicht die genannten Schäden auftreten können, wie sie beispielsweise bei Verwendung von Metall erfolgen würden.The hard ceramic parts, which are preferably ring-shaped, are designed as rings, it is ensured that even if the upper part of the container is tilted No welding of the boundary surfaces to the lower part of the container of the bottom and top of the container, but permanent smooth rotatability the upper part is ensured relative to the lower part. In a preferred embodiment it is provided that there is a finite gap between the ceramic parts is. The gap size will usually be such that they in the range of the particle size or slightly below this lies so that particles do not pass through the gap from the Can penetrate outside of the grinding machine. By forming the ceramic rings on the lower part of the container and on the upper face of the container bottom part it also ensures that in case of intrusion a very small abrasive particle in the gap, whereby the above-mentioned edging can only be done due to the relative rotational movement between the upper and lower part the particle is crushed, but not the above Damage can occur, such as in Metal would be used.

Durch die Erfindung kann die Spaltbreite an die Größe der verwendeten Schleifmittelteilchen angepaßt werden. Dabei sehen weitere bevorzugte Ausgestaltungen vor, daß der Spalt eine Größe von 0,05-0,5 mm aufweist und insbesondere, daß der Spalt eine Größe von ca. 0,3 mm aufweist, wobei selbstverständlich zu beachten ist, daß der Spalt nicht größer als die (minimalen) Abmessungen der Schleifmittelteilchen sein soll.Through the invention, the gap width to the size of the abrasive particles used are adjusted. there provide further preferred embodiments that the Gap has a size of 0.05-0.5 mm and in particular, that the gap has a size of approximately 0.3 mm, it should of course be noted that the gap not larger than the (minimum) dimensions of the abrasive particles should be.

Die Einstellbarkeit des Spaltes kann in verschiedener Weise vorgenommen werden, beispielsweise durch Unterlegscheiben oder dgl. Eine äußerst bevorzugte Ausgestaltung sieht aber vor, daß der Spalt über Stellschrauben einstellbar ist, wobei insbesondere die Stellschrauben am Umfang des Behälter-Oberteils und einem dieses tragenden Tragteils angeordnet sind.The adjustability of the gap can be different Be done, for example by washers or the like. An extremely preferred embodiment but provides that the gap can be adjusted using adjusting screws is, in particular the set screws on Circumference of the upper part of the container and one carrying it Carrying part are arranged.

In weiterer bevorzugter Ausbildung ist vorgesehen, daß die Innenwandung des Behälter-Oberteils sich in ihrem unteren Endabschnitt radial nach innen konisch verjüngt. Auf diese Weise wird erreicht, daß das Behälter-Oberteil über den größten Teil seiner Höhe einen relativ großen Durchmesser aufweisen kann, der sich aufgrund der konischen Ausgestaltung des unteren Endbereichs zu einem unteren Rand mit deutlich kleinerem Durchmesser verringert. Da der Durchmesser des unteren Randes die notwendige Größe bzw. den Durchmesser der Dichtung bestimmt, können bei der erfindungsgemäßen Fliehkraft-Gleitschleifmaschine einstückige Schleifringe aus Keramik Verwendung finden, obwohl das Behälteroberteil ein relativ großes Volumen und damit eine hohe Arbeitsleistung besitzt. Bei bekannten Fliehkraft-Gleitschleifmaschinen können die zu bearbeitenden Werkstücke, insbesondere bei Vorhandensein von knickempfindlichen Beinchen etc., während des Schleifprozesses beschädigt oder verbogen werden, was darin begründet ist, daß die Werkstücke im Übergang von drehendem Bodenteil auf das stationäre Behälter-Oberteil stark abgebremst werden und gleichzeitig eine Umlenkung von der unter einem Winkel von ca. 30 bis 45° schräg nach oben verlaufenden Innenwandung des Bodenteils auf die im wesentlichen vertikale Innenwandung des Behälter-Oberteils erfahren. Da der untere Abschnitt des Behälter-Oberteils sich nach der vorstehend beschriebenen Ausgestaltung konisch nach innen verjüngt, verläuft seine Innenwandung unter einem Winkel relativ zur Vertikalen. Auch die Innenwandung des Bodenteils verläuft schräg zur Vertikalen. Durch entsprechende Ausgestaltung kann der zwischen den beiden Innenwandungen von Bodenteil und Behälter-Oberteil auftretende Winkel klein gehalten werden, so daß die aus einer Umlenkung der zu bearbeitenden Werkstücke resultierende Belastung gering ist. In bevorzugter Ausgestaltung ist vorgesehen, daß die Innenwandungen von Behälter-Oberteil und -Bodenteil im Bereich des Spaltes fluchten. Die Innenwandung des Bodenteils geht also glatt in die Innenwandung des Behälter-Oberteils über. Hierdurch sind keine Unebenheiten im Übergangsbereich gegeben, wie sie durch Kanten oder Abwicklungen beim Stand der Technik vorhanden sind.In a further preferred embodiment it is provided that the inner wall of the upper part of the container is in her lower end section tapers radially inwards. In this way it is achieved that the upper part of the container a relatively large one over most of its height Can have a diameter that is due to the conical Design of the lower end area into one reduced lower margin with a much smaller diameter. Because the diameter of the bottom is the necessary Determines the size or diameter of the seal, can with the centrifugal slide grinding machine according to the invention one-piece slip rings made of ceramic use find, although the container top is a relatively large Volume and thus a high work rate. at Known centrifugal vibratory grinders can do that too machining workpieces, especially if they are present of kink sensitive legs etc., during the Grinding process can be damaged or bent what is based on the fact that the workpieces in the transition from rotating bottom part on the stationary container top be braked strongly and at the same time a redirection from at an angle of approx. 30 to 45 ° inner wall of the bottom part on the inside essential vertical inner wall of the upper part of the container Experienced. Because the lower section of the container top according to the configuration described above tapered inwards, its runs Inner wall at an angle relative to the vertical. The inner wall of the bottom part also runs obliquely to Vertical. By appropriate design, the between the two inner walls of the bottom part and Angle of the container upper part kept small be, so that from a deflection of the to be processed Workpieces resulting load is low. In a preferred embodiment provides that the inner walls of container top and bottom part in the area of the gap. The inner wall of the bottom part goes smoothly into the inner wall of the upper part of the container about. As a result, there are no unevenness in the transition area given how by edging or unwinding are present in the prior art.

Für die Ausgestaltung und insbesondere die Ausrichtung der Anlagefläche zwischen dem unteren Rand des Behälter-Oberteils und dem oberen Rand des Bodenteils sind verschiedene Alternativen denkbar. In einer möglichen Ausgestaltung ist vorgesehen, daß der Spalt unter einem deutlich von einem rechten Winkel abweichenden Winkel zu den Innenwandungen von Behälter-Oberteil und -Bodenteil ausgerichtet ist, wobei insbesondere der Spalt im wesentlichen horizontal bzw. senkrecht zur Drehachse ausgerichtet ist. Hierdurch wirkt eine axiale Bewegung des Behälter-Oberteils oder Bodenteils gleichmäßig auf die Anlagefläche.For the design and in particular the alignment the contact surface between the lower edge of the upper part of the container and the top of the bottom part are different Alternatives conceivable. In one possible embodiment it is envisaged that the gap clearly under one angle deviating from a right angle to the Inner walls of the top and bottom part of the container is aligned, in particular the gap essentially aligned horizontally or perpendicular to the axis of rotation is. This causes an axial movement of the upper part of the container or bottom part evenly on the contact surface.

Alternativ kann vorgesehen sein, daß der Spalt unter einem rechten Winkel zu den Innenwandungen von Behälter-Oberteil und -Bodenteil ausgerichtet ist. Der äußere Teil des Behälter-Bodenteils besteht vorzugsweise aus Aluminium oder einer Aluminium-Legierung. Gleiches kann für das Behälter-Oberteil der Fall sein. Die Auskleidung besteht bevorzugt aus Polyurethan.Alternatively, it can be provided that the gap below at a right angle to the inner walls of the upper part of the container and floor part is aligned. The outer part the bottom part of the container is preferably made of aluminum or an aluminum alloy. The same can be done for the top of the container should be the case. The lining consists preferably of polyurethane.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Ansprüchen und aus der nachfolgenden Beschreibung, in der Ausführungsbeispiele der Erfindung unter Bezugnahme auf die Zeichnungen im einzelnen erläutert sind. Dabei zeigt:

Fig. 1
einen Vertikalschnitt durch eine erfindungsgemäße Fliehkraft-Gleitschleifmaschine mit zwei Ausgestaltungen II und III des Spaltes zwischen Behälter-Bodenteil und -Oberteil, jeweils rechts und links in der Fig. 1;
Fig. 2
in vergrößerter Darstellung die Spaltausgestaltung gemäß II der Fig. 1 und
Fig. 3
ebenfalls in vergrößerter Darstellung die Spaltausgestaltung gemäß III der Fig. 1.
Further advantages and features of the invention result from the claims and from the following description in which exemplary embodiments of the invention are explained in detail with reference to the drawings. It shows:
Fig. 1
a vertical section through a centrifugal slide grinding machine according to the invention with two configurations II and III of the gap between the container bottom part and upper part, each on the right and left in Fig. 1;
Fig. 2
in an enlarged view the gap configuration according to II of FIGS. 1 and
Fig. 3
likewise in an enlarged representation the gap configuration according to III of FIG. 1.

Die erfindungsgemäße Fliehkraft-Gleitschleifmaschine 10 weist ein an einem nicht dargestellten Maschinenträger angebrachtes äußeres, gehäuseartiges Tragteil 11 auf. Am Tragteil 11 ist über eine Lagerung 11a ein drehbares Behälter-Bodenteil über seine Antriebsachse 12a drehbar gelagert. Das Behälter-Bodenteil 12 wird über die Achse 12a von einem nicht dargestellten Antrieb angetrieben.The centrifugal slide grinding machine 10 according to the invention has a on a machine carrier, not shown attached outer, housing-like support member 11. At the Support part 11 is rotatable via a bearing 11a Container bottom part rotatable about its drive axis 12a stored. The container bottom part 12 is on the axis 12a driven by a drive, not shown.

Am oberen Rand 11b des Tragteils 11 sitzt, mit dem Tragteil 11 verbunden, ein Behälter-Oberteil 13. Das Behälter-Oberteil ist mit dem Tragteil 11 über Einstellschrauben 14 verbunden und mittels dieser Schrauben in seiner Höhe in Richtung der Drehachse D einstellbar. Die Schrauben 14 liegen mit ihren Köpfen 16 jeweils auf einem radial außen am Behälter-Oberteil 13 angeordneten Flansch 13d auf, den die Schrauben 14 mit ihrem Gewindebolzen durchragen.Sitting on the upper edge 11b of the support member 11 with the support member 11 connected, a container upper part 13. The container upper part is with the support member 11 via adjusting screws 14 connected and by means of these screws in his Height adjustable in the direction of the axis of rotation D. The screws 14 with their heads 16 each on one flange arranged radially on the outside of the container upper part 13 13d on which the screws 14 with their threaded bolts project through.

Das Behälter-Oberteil 13 weist ein metallisches Außenteil 13a auf, das innenseitig mit einer Beschichtung 13b versehen ist. Das Außenteil 13a hat eine im wesentlichen kreiszylindrische Form und ist auf seiner Innenwandung radial nach innen konisch verjüngt. Die Beschichtung 13b folgt im wesentlichen dieser konischen Ausgestaltung, so daß der untere Rand des Behälter-Oberteils 13 einen geringeren Innendurchmesser als der darüber angeordnete, im wesentlichen kreiszylinderförmige Abschnitt des Behälter-Oberteils 13 aufweist.The container upper part 13 has a metallic outer part 13a on the inside with a coating 13b is provided. The outer part 13a has one circular cylindrical shape and is on its inner wall tapers radially inwards. The coating 13b essentially follows this conical configuration, see above that the lower edge of the container upper part 13 one smaller inner diameter than the one above it essentially circular cylindrical section of the upper part of the container 13 has.

An der unteren Stirnseite des Behälter-Oberteils 13 ist ein ringförmiges Keramikteil 17 befestigt, dessen Vorderseite 17a mit der Innenwandung 13f der Beschichtung 13b des Behälter-Oberteils 13 fluchtet. Im vorderen Bereich weist das Keramikteil 17 eine nach unten gerichtete Nase 17b auf.At the lower end of the container upper part 13 is attached an annular ceramic part 17, the front 17a with the inner wall 13f of the coating 13b of the container upper part 13 is aligned. In the front area the ceramic part 17 has a downward nose 17b.

Das Bodenteil 12 weist ebenfalls ein metallisches Außenteil 12a und eine Beschichtung 12b auf. In dem dem Behälter-Oberteil 13 benachbarten Bereich weist das Außenteil 12a des Bodenteils 12 eine sich konisch erweiternde Innenwandung 12c auf. Das Außenteil 12a des Bodenteils 12 ist ebenfalls mit einer Beschichtung 12b versehen und deren Innenwandung 12f folgt im wesentlichen der Innenwandung 12c des Außenteils 12a. In dem dem Behälter-Oberteil 13 zugewandten Bereich ist das Bodenteil 12 ebenfalls mit einem ringförmigen Keramikteil 18 versehen, dessen Innenwandung 18a mit der Innenwandung 17a - und auch der Innenwandung 12f der Beschichtung 12b - fluchtet.The bottom part 12 also has a metallic outer part 12a and a coating 12b. In the top of the container 13 adjacent area has the outer part 12a of the bottom part 12 a flared Inner wall 12c. The outer part 12a of the bottom part 12 is also provided with a coating 12b and the inner wall 12f essentially follows the inner wall 12c of the outer part 12a. In the top of the container 13 facing area is the bottom part 12 also provided with an annular ceramic part 18, whose inner wall 18a with the inner wall 17a - and also the inner wall 12f of the coating 12b - is aligned.

Zwischen der Nase 17b und der Oberseite 18b des Keramikteils 18 ist ein einstellbarer Schlitz S mit einer endlichen Schlitzbreite gebildet, die von der Größe des verwendeten Schleifmaterials abhängt, aber vorzugsweise in der Größenordnung von 0,3 mm liegt.Between the nose 17b and the top 18b of the ceramic part 18 is an adjustable slot S with a finite one Slot width formed by the size of the used Abrasive material depends, but preferably in is of the order of 0.3 mm.

Bei der Ausgestaltung der Fig. 2 verläuft die Oberseite 18b und die Unterseite der Nase 17b im wesentlichen horizontal und damit unter einem Winkel ungleich 90° zu den Innenwandungen 13f, 17a, 18a, 12f.2, the top runs 18b and the underside of the nose 17b essentially horizontally and therefore at an angle not equal to 90 ° the inner walls 13f, 17a, 18a, 12f.

Die Ausgestaltung der Fig. 3 entspricht im wesentlichen der der Fig. 2. Ein Unterschied besteht darin, daß die Oberseite 18b des Keramikteils 18 von außen nach innen verlaufend nach oben hin abgewinkelt ist. Die Unterseite der Nase 17b verläuft parallel zu dem vorderen oder inneren Bereich der Oberseite 18b des Keramikteils 18. Damit ist der Schlitz S bei der Ausgestaltung der Fig. 3 derart ausgerichtet, daß er einen rechten Winkel zu den Innenwandungen 13f, 17a, 18a, 12f bildet.3 corresponds essentially that of Fig. 2. A difference is that the Top 18b of the ceramic part 18 from the outside inwards is angled upwards. The bottom the nose 17b is parallel to the front or inner area of the upper side 18b of the ceramic part 18. The slot S is thus in the embodiment of FIG. 3 aligned so that it is at right angles to the Forms inner walls 13f, 17a, 18a, 12f.

Es hat sich gezeigt, daß durch die erfindungsgemäße Ausgestaltung mit einem durch zwei Keramikteile 17, 18 begrenzten Spalt S zwischen Behälter-Bodenteil 12 und -Oberteil 13 zuverlässig ein trockenes Schleifen von zu schleifenden Teilen mittels Schleifmittel erzielt werden kann, ohne daß die Gefahr eines Verschweißens der den Schlitz S begrenzenden Wandungen bzw. Bereiche 17b, 18b eintreten kann.It has been shown that the inventive Design with a through two ceramic parts 17, 18th limited gap S between the container bottom part 12 and -Upper part 13 reliably dry grinding too grinding parts can be achieved with abrasives can without the risk of welding the Walls or regions 17b, 18b delimiting slot S can occur.

Claims (13)

  1. Centrifugal sliding grinding machine (10) with a shell-like, rotary container lower part (12) and a stationary, substantially cylindrical container upper part (13), which are provided on their facing end faces with in each case a ceramic part (17, 18), characterized in that between the ceramic parts (17, 18) is provided an adjustable gap (S) with a horizontal extension component on its inside and that on its inside the upper ceramic part has a downwardly directed nose (17b).
  2. Grinding machine according to claim 1, characterized in that the size of the gap is between 0.05 and 0.5 mm.
  3. Grinding machine according to claim 2, characterized in that the size of the gap is approximately 0.3 mm.
  4. Grinding machine according to one of the claims 1 to 3, characterized in that the gap is adjustable by means of setscrews (14).
  5. Grinding machine according to claim 4, characterized in that the setscrews (14) are located on the circumference of the container upper part (13) and a supporting part (11) supporting the latter.
  6. Grinding machine according to one of the preceding claims, characterized in that the inner wall of the container upper part (13) tapers conically and radially inwards in its lower end portion.
  7. Grinding machine according to one of the preceding claims and in particular according to claim 6, characterized in that the inner walls of the container upper part (13) and lower part (12) are aligned in the vicinity of the gap (S).
  8. Grinding machine according to one of the claims 1 to 7, characterized in that the gap (S) is oriented under an angle clearly differing from a right angle with respect to the inner walls of the container upper part (13) and lower part (12).
  9. Grinding machine according to one of the preceding claims, characterized in that the gap (S) is oriented under a right angle to the inner walls of the container upper part (13) and lower part (12).
  10. Grinding machine according to one of the claims 1 to 8, characterized in that the gap (S) is oriented substantially horizontally or perpendicularly to the rotation axis (D).
  11. Grinding machine according to one of the preceding claims, characterized in that the container lower part (12) is made from aluminium.
  12. Grinding machine according to one of the claims 1 to 10, characterized in that the container lower part (12) is made from an aluminium alloy.
  13. Grinding machine according to one of the preceding claims, characterized in that the lining (12b, 13b) of the container lower part and/or upper part are made from polyurethane.
EP98102679A 1997-02-19 1998-02-17 Centrifugal polishing machine Expired - Lifetime EP0860236B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29702859U DE29702859U1 (en) 1997-02-19 1997-02-19 Centrifugal vibratory grinding machine
DE29702859U 1997-02-19

Publications (3)

Publication Number Publication Date
EP0860236A2 EP0860236A2 (en) 1998-08-26
EP0860236A3 EP0860236A3 (en) 2000-02-02
EP0860236B1 true EP0860236B1 (en) 2002-07-17

Family

ID=8036153

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Application Number Title Priority Date Filing Date
EP98102679A Expired - Lifetime EP0860236B1 (en) 1997-02-19 1998-02-17 Centrifugal polishing machine

Country Status (4)

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US (1) US6296556B1 (en)
EP (1) EP0860236B1 (en)
DE (2) DE29702859U1 (en)
ES (1) ES2178791T3 (en)

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DE20018805U1 (en) * 2000-11-03 2001-01-04 Otec Praezisionsfinish Gmbh Grinding machine
JP2005021810A (en) * 2003-07-02 2005-01-27 Tipton Mfg Corp Coating apparatus
CA2597508C (en) * 2005-02-15 2012-02-07 Sintobrator, Ltd. Fluid barrel-polishing device and polishing method
DE202013002000U1 (en) 2013-03-04 2014-03-13 Otec Präzisionsfinish GmbH Centrifugal sliding grinder
DE102013204816A1 (en) * 2013-03-19 2014-09-25 Rösler Holding GmbH & Co. KG SLIDING MACHINE AND PROCESSING FOR COLUMN ADJUSTMENT
CN204525132U (en) * 2015-04-23 2015-08-05 浙江湖磨抛光磨具制造有限公司 Seamless flowing light finishing machine
CN107614198B (en) * 2015-05-18 2020-01-31 安百拓凿岩钎具有限公司 Method for treating toughness and hardness of drill bit buttons
CN105538122A (en) * 2016-01-21 2016-05-04 浙江湖磨抛光磨具制造有限公司 Seamless dry type flowing polishing method and flowing polishing machine

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Also Published As

Publication number Publication date
EP0860236A3 (en) 2000-02-02
ES2178791T3 (en) 2003-01-01
EP0860236A2 (en) 1998-08-26
DE29702859U1 (en) 1998-03-19
US6296556B1 (en) 2001-10-02
DE59804756D1 (en) 2002-08-22

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