EP0338359B1 - Centrifugal polishing machine - Google Patents

Centrifugal polishing machine Download PDF

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Publication number
EP0338359B1
EP0338359B1 EP89106259A EP89106259A EP0338359B1 EP 0338359 B1 EP0338359 B1 EP 0338359B1 EP 89106259 A EP89106259 A EP 89106259A EP 89106259 A EP89106259 A EP 89106259A EP 0338359 B1 EP0338359 B1 EP 0338359B1
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EP
European Patent Office
Prior art keywords
gap
grinder according
centrifugal sliding
wall
receptacle
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EP89106259A
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German (de)
French (fr)
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EP0338359A2 (en
EP0338359A3 (en
Inventor
Henning Dietmar Walther
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Carl Kurt Walther GmbH and Co KG
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Carl Kurt Walther GmbH and Co KG
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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 mass finishing machine according to the preamble of claims 1 and 2.
  • a horizontal separation gap has been selected, the gap size of which can be adjusted (EP-A-0 171 527).
  • the gap-forming surfaces are formed by overlapping hard metal rings. In this way, the service life is increased. However, this is associated with an increased manufacturing outlay. Abrasion in the separation gap occurs regardless of the orientation of the bottom's axis of rotation, both in the vertical and horizontal positions thereof.
  • a measure for clearing the gap in a centrifugal mass finishing machine of the type mentioned at the outset is known from European patent application 0 232 532, in which the discharge element is designed as a water jet directed into the gap. By flushing liquid through the gap, workpieces or wear particles that have penetrated into the gap space are flushed out.
  • the invention has for its object to design a centrifugal slide grinding machine of the type in question in a technically simple manner in such a way that removal of contents particles that have penetrated into the gap is ensured with simple means.
  • the discharge elements are designed with structurally simple means.
  • the discharge element designed as a projection means that the filling material particles which have penetrated into the gap have only a short residence time. In particular, it cannot happen that they are constantly entrained within the separation gap due to friction, which can lead to an increase in the gap.
  • the projections which are designed according to the invention as hard metal platelets or as brushes, are preferably passed into the interior of the container so that they are subject to further comminution there.
  • the comminution can possibly also be carried out by the discharge element itself, so that the comminuted filling material particles then penetrate the separation gap without causing abrasion.
  • the discharge element this can be an element that rotates with the bottom and / or is fixed to the container wall. It is fundamentally prevented that a multiple circulation of filling material particles takes place within the separation gap, since penetrating filling material particles always have a relative movement both to the surrounding floor and to the fixed container wall.
  • the separating gap can be kept at a predetermined size by the inventive measure over a long period of time.
  • a variant is characterized in that the discharge element is designed as a protrusion which is fastened to at least one of the walls of the separating gap and projects into it is. As soon as it hits the filling material particles, they are discharged in a corresponding manner.
  • the projection has a cutting edge that points counter to the direction of movement of the filling material particles.
  • the filling material particle is an abrasive grain splinter, it can be reduced to a grain size, the fragments being below the size of the thickness of the separation gap. These crushed particles can then penetrate the further separation gap largely without friction. If the penetrated filling material particle is a workpiece or workpiece area, this or this is returned to the interior of the container.
  • the service life of the projections is increased if they are formed by at least one hard metal plate.
  • a double effect is achieved if the cutting edge of the projection is inclined to the plane of rotation of the base in such a way that the cutting edge rises in the opposite direction or in the direction of rotation to the inner edge of the base edge.
  • the cutting edge means the one edge of the hard metal plate that has a cutting function.
  • a tapering of the cutting edge with a triangular cross section is not necessary, but can be provided.
  • the double effect is that, firstly, the corresponding filling material particles are smashed and subsequently inclined to be conveyed into the container. The latter occurs when the cutting edge rises towards the inner edge of the bottom against the direction of rotation of the bottom.
  • the cutting edge in the direction of rotation is selected, this leads to a conveyance of the broken particles of the filling material through the separating gap to the outside (i.e. from the Container out).
  • the projection forming the cutting edge can be attached either to the bottom or to the container. Then there is the possibility of providing one projection on the bottom and the other on the container in such a way that they do not adversely affect one cycle.
  • At least two projections are each provided with cutting edges which are inclined to the plane of rotation of the base in such a way that one rises in the opposite direction and the other in the direction of rotation towards the inner edge of the base.
  • Both cutting edges can be fixed either on the bottom or on the container.
  • An arrangement is also conceivable in which one cutting edge is on the bottom and the other is on the container.
  • a plurality of projections or hard metal plates are provided in rows one behind the other.
  • the hard metal plates have a parallelogram-like plan, so that the upper parallelogram edges then represent the cutting edges.
  • One way of permanently attaching the hard metal plate to one of the walls of the separation gap is for the hard metal plate to have at least one hole through which a fastening screw passes, the head of which lies within a depression in the hole.
  • the attachment of the hard metal plate and a possible exchange of the same can be carried out easily in this way.
  • the shaft end of the fastening screw is in a reinforcement insert of the bottom having a plastic covering is screwed in.
  • the reinforcement insert also serves to hold the hard metal plate.
  • This recess can be located on the container (wall) and / or on the bottom.
  • the discharge element is designed as a brush, by means of which the discharge effect is exerted on particles that have entered the separation gap. It is advisable to arrange the brush in an adjustable and replaceable manner. This results in an adaptation to the gap width, so that a functional position is always guaranteed even after the bristles or possibly the walls of the separation gap have worn out.
  • the brush can advantageously be arranged on an exchangeable section of the wall of the separating gap, the section being held radially by means of guides and being insertable from the bottom underside. The latter makes it easier to replace and readjust. Furthermore, there are no niches into which the product particles can enter and remain.
  • the brushes have a discharge effect similar to that of the aforementioned cutter construction.
  • a further development is characterized by a brush that extends over 360 °. It can be arranged on the bottom-side gap wall or on the container-side gap wall. It is also conceivable to use two 360 ° brushes (one on the bottom, the other on the container).
  • the range of applications of the centrifugal vibratory grinding machine can be increased by the brush, which extends over 360 °, as this z. B. in particular the possibility is opened to surface-treat corresponding workpieces without a machining body, because even if the workpieces should be very small or train members who could enter the gap, there is no danger for the gap, since the brush prevents penetration .
  • the brush can be arranged on the wall of the bottom or on the wall of the container in order to prevent the particles of large filling material from entering the separation gap.
  • two such brushes can also be used, one of which is arranged on the wall of the base and the other on the wall of the container.
  • the arrangement can be provided one above the other.
  • the discharge of the product particles from the separation gap is particularly effective in that the water jet runs approximately in the direction of the separation gap.
  • the jet nozzle in a stationary manner, that is to say on the container itself.
  • jet nozzles connected to a distributor pipe are provided, such an alignment can be provided that they lie one behind the other at an increasing altitude in order to increase the discharge effect of the filling material particles which have entered the separation gap.
  • the latter can be achieved in a simple manner in that the jet nozzles are at different distances from the inner edge of the bottom edge. This can be achieved by an inclined arrangement of the distributor pipe with the jet nozzles connected to it.
  • the partial arrangement of the jet nozzles does not block the flow of the treatment liquid flowing out of the container. The sludge removal is not hindered. It is conceivable that the jet of liquid injected at the same time wholly or partially moistens the contents of the container (treatment agent).
  • the spreading effect of the product particles which have penetrated into the separation gap can be improved in a simple manner by the jet nozzle opening into a niche in front of it in the wall of the separation gap. As soon as the particles enter the niche, they are no longer taken away; they become free and can be better moved back into the container interior by the water jet.
  • a support frame 1 which can be pivoted about a horizontal axis (not shown).
  • This has a flange 2 to which a container 3, preferably made of polyurethane, is connected. Its bottom 4 rotates relative to the container wall 5 about a vertically aligned container axis 6.
  • a separating gap 7 is formed between the bottom 4 and the container wall 5. The latter extends ascending to the inner edge 8 of the bottom edge.
  • the container wall 5 is equipped with an annular lining 9, which is highly wear-resistant and, if necessary, allows replacement.
  • the bottom 4 is in turn plate-shaped in such a way that the container wall 5 adjoins the plate base.
  • the container 3 receives filling material, not shown, consisting of workpieces and processing bodies with the addition of treatment liquid.
  • a drive motor 10 fastened to the support frame 1 drives the floor 4 via a belt drive 11.
  • the mixture of processing bodies, workpieces and treatment liquid is pressed through the rotating base 4 against the inner wall of the container 3 and transported upwards. From there it slides back to the center of the rotating floor 4.
  • an annular bead is formed in the container 3, which is formed by the contents of the container.
  • the container can be closed by a cover 12 during the machining of the workpieces.
  • FIGS. 1 to 3 In order to prevent filling material particles of separation gap width entering the separation gap 7 from circulating continuously within the separation gap and thereby promoting the wear of the opposing walls 13, 14 of base 4 and lining 9, discharge elements A in the form of projections are shown in FIGS. 1 to 3 provided, which in turn are designed as a hard metal plate 15. There are three rows one behind the other at the level of the separation gap 7 Carbide plates 15 are provided, which have a parallelogram-like plan. As a result, the upper parallelogram edges 16 form a cutting edge S which rises towards the inner edge 8 of the bottom edge counter to the direction of rotation x. This looks so that the cutting edge S of the lower hard metal plate 15 has a greater distance from the edge 8 of the bottom edge than the cutting edges of the higher hard metal plate 15.
  • each hard metal plate 15 has a bore 17 through which a fastening screw 18 passes. So that the head 19 does not protrude above the plate 15, it lies within a depression 20 of the bore 17 of the hard metal plate 15.
  • the shaft end of the fastening screw 18 is screwed into a reinforcing insert 21 of the base 4, which has a plastic casing 22.
  • the hard metal plate 15 lies in a recess 23 in the wall 13 of the separation gap 7. With regard to the wall 13, this is that of the base 4.
  • the recess 23 extends as far as the reinforcing insert 21, so that the hard metal plate can be braced against it. The rotation of the hard metal plate is achieved through the recess 23.
  • the protrusion of the hard metal platelets 15 is slightly less than the gap width. If filling material particles get into the separation gap, they only run around in this until they are gripped and crushed by the hard metal plate 15. The danger of the separation gap being enlarged by the comminuted particles then no longer occurs which particles are washed out with the treatment liquid.
  • the filling material particles may also be returned to the interior of the container through the rising cutting edges 16 of the hard metal plates 15.
  • the hard metal flake solution shown in FIG. 4 differs from the one described above in that several hard metal flakes are combined to form a single, elongated hard metal flake 24. There is now a continuous cutting edge S1 with the same orientation. This elongated hard metal plate 24 is attached to the bottom 4 in an equivalent manner by means of three fastening screws 18. Otherwise, the same components have the same reference numbers.
  • the hard metal plates 15 can also be oriented such that their cutting edges S rise in the direction of rotation x towards the inner edge 8 of the bottom edge.
  • the hard metal plates 15 can also be oriented such that their cutting edges S rise in the direction of rotation x towards the inner edge 8 of the bottom edge.
  • they could also be attached to the container.
  • Another possibility could be realized by fixing one row of the hard metal plates with the appropriate orientation on the bottom and the other on the container.
  • the discharge element A is now designed as a brush 25. It is located on an exchangeable section 26 of the wall 13 of the base 4. This section 26 is provided in the insertion direction with lateral dovetail sections 27 which engage in correspondingly undercut grooves 28 in the wall 13. In this way, the section 26 is held on the bottom 4 in the radial direction. If necessary, a measure (not illustrated) can be taken to make the brush 25 adjustable from the bottom underside. The inserted position of the brush 25 having bristles 29 is secured by screws 30 screwed into the base 4.
  • the brush 25 has a run-up slope 31 which rises up to the inner edge 8 of the bottom against the direction of rotation x. Otherwise, the run-up slope 31 extends over the entire height of the separation gap 7. It is thus ensured that filling material particles reaching the area of the brush 25 are conveyed out of the separation gap.
  • the discharge elements A designed as brushes are assigned a jet nozzle 37 which sprays the water jet approximately in the direction of the separation gap 7 and in the direction of the interior of the container.
  • the jet nozzle 37 is located at the end of a tube 38 passing through the flange 2. Instead of a single jet nozzle 37, however, several can be provided in the same circumferential distribution.
  • the water jet coming from the jet nozzle 37 conveys filler particles of corresponding grain size that have entered the separation gap 7 into the interior of the container.
  • the bottom 4 is also equipped with a brush 25 according to Figures 5 and 6. There is an offset in the circumferential direction between the jet nozzle 37 and the brush. This ensures that the water jet and the brush do not interfere with each other and the water jet can be directed unhindered to any particles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Erfindung betrifft eine Fliehkraft-Gleitschleifmaschine gemäß Gattungsbegriff der Ansprüche 1 und 2.The invention relates to a centrifugal mass finishing machine according to the preamble of claims 1 and 2.

Aus der US-A- 4,177,608 ist eine Fliehkraft-Gleitschleifmaschine bekannt, bei welcher die bei der Bearbeitung zugegebene, sich mit Abriebteilchen anreichernde Flüssigkeit (z. B. Wasser) durch den Trennspalt abfließt. Dabei läßt es sich nicht verhindern, daß größere, der Spaltbreite entsprechende Füllgutpartikel ebenfalls in den Trennspalt gelangen und sich dort abwälzen. Dies fördert erheblich den Verschleiß, so daß es nach gewisser Laufzeit erforderlich ist, den Boden bzw. den Behälter auszuwechseln verbunden mit erheblichen Kosten. Um diesem Nachteil entgegenzuwirken, hat man verschiedene Querschnittsformen des Trennspaltes und Ausrichtungen desselben gewählt. Die Ergebnisse sind jedoch immer noch unzureichend.From US-A-4,177,608 a centrifugal slide grinding machine is known, in which the liquid (e.g. water) which is added during processing and accumulates with abrasion particles flows out through the separation gap. It cannot be prevented that larger filling material particles corresponding to the gap width also get into the separation gap and roll there. This promotes wear considerably, so that after a certain period of time it is necessary to replace the floor or the container, which is associated with considerable costs. To counteract this disadvantage, different cross-sectional shapes of the separation gap and orientations of the same have been chosen. However, the results are still insufficient.

Ferner hat man einen Horizontalen Trennspalt gewählt, dessen Spaltgröße nachstellbar ist (EP-A- 0 171 527). Dabei sind die spaltbildenden Flächen von sich einander überlappenden Hartmetallringen gebildet. Auf diese Weise wird die Standzeit erhöht. Verbunden ist dies jedoch mit einem vergrößerten Herstellungsaufwand. Der Abrieb im Trennspalt tritt ungeachtet der Ausrichtung der Rotationsachse des Bodens auf, und zwar sowohl in der vertikalen als auch horizontalen Stellung derselben.Furthermore, a horizontal separation gap has been selected, the gap size of which can be adjusted (EP-A-0 171 527). The gap-forming surfaces are formed by overlapping hard metal rings. In this way, the service life is increased. However, this is associated with an increased manufacturing outlay. Abrasion in the separation gap occurs regardless of the orientation of the bottom's axis of rotation, both in the vertical and horizontal positions thereof.

Eine maßnahme zur Spalt-Freiräumung bei einer Fliehkraft-Gleitschleifmaschine der eingangs genannten Art ist bekannt aus der europäischen Patentanmeldung 0 232 532, bei welcher das Austragungselement als ein in den Spalt gerichteter Wasserstrahl ausgebildet ist. Durch Hindurchspülen von Flüssigkeit durch den Spalt werden in den Spaltraum eingedrungene Werkstücke bzw. Abriebteilchen herausgespült.A measure for clearing the gap in a centrifugal mass finishing machine of the type mentioned at the outset is known from European patent application 0 232 532, in which the discharge element is designed as a water jet directed into the gap. By flushing liquid through the gap, workpieces or wear particles that have penetrated into the gap space are flushed out.

Ausgehend von dem letztgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Fliehkraft-Gleitschleifmaschine der in Rede stehenden Art in herstellungstechnisch einfacher Weise so auszugestalten, daß ein Entfernen von in den Spaltraum eingedrungenen Füllgutpartikeln mit einfachen Mitteln gewährleistet wird.Based on the last-mentioned prior art, the invention has for its object to design a centrifugal slide grinding machine of the type in question in a technically simple manner in such a way that removal of contents particles that have penetrated into the gap is ensured with simple means.

Gelöst wird diese Aufgabe durch die in den Ansprüchen 1 und 2 angegebene Erfindung.This object is achieved by the invention specified in claims 1 and 2.

Die Unteransprüche stellen vorteilhafte Weiterbildungen der Erfindung dar.The subclaims represent advantageous developments of the invention.

Zufolge derartiger Ausgestaltung ist eine gattungsgemäße Fliehkraft-Gleitschleifmaschine von erhöhtem Gebrauchswert geschaffen. Die Austragungselemente sind mit baulich einfachen Mitteln gestaltet. Das als Vorsprung ausgebildete Austragungselement bewirkt, daß die in den Spaltraum eingedrungenen Füllgutpartikeln nur noch eine kurze Verweildauer haben. Insbesondere kann es nicht geschehen, daß sie ständig innerhalb des Trennspaltes zufolge Reibung mitgenommen werden, was zu einer Spaltvergrößerung führen kann. Die Füllgutpartikel werden kurz nach ihrem Eintritt in den Spaltraum von den den Vorsprüngen, die erfindungsgemäß als Hartmetallplättchen oder als Bürsten ausgebildet sind, vorzugsweise ins Behälterinnere geleitet, so daß sie dort einer weiteren Zerkleinerung unterliegen. Eventuell kann die Zerkleinerung auch durch das Austragselement selbst erfolgen, so daß anschließend die zerkleinerten Füllgutpartikel den Trennspalt, ohne Abrieb zu verursachen, durchsetzen. Versuche haben ergeben, daß jenseits des Trennspaltes keine Füllgutpartikel aufgefunden wurden, deren Korngröße der Spaltbreite entspricht. Bezüglich des Austragselementes kann es sich dabei um ein mit dem Boden umlaufendes und/oder zu der Behälterwandung feststehendes Element handeln. Grundsätzlich ist verhindert, daß ein Mehrfachumlauf von Füllgutpartikeln innerhalb des Trennspaltraumes stattfindet, da eingedrungene Füllgutpartikel stets eine Relativbewegung sowohl zum umlaufenden Boden als auch zur feststehenden Behälterwandung aufweisen. Der Trennspalt kann durch die erfinderische Maßnahme über eine lange Laufzeit auf eine vorgegebene Größe gehalten werden. Es tritt auch nicht der Nachteil auf, daß beim Bearbeiten von Werkstücken unter Zugabe von Behandlungsflüssigkeit diese aufgrund sich schnell vergrößernder Spaltbreite den Behälter durch den Trennspalt in steigender Rate verläßt, was ein entsprechendes Zuführen notwendig werden ließe. Bei Anordnung eines einzigen Austragselements ist erreicht, daß der Umlaufweg von in den Trennspalt eingedrungenen Füllgutpartikeln kleiner bzw. höchstens etwa gleich 360° ist. Werden mehrere, vorzugsweise in gleicher Winkelverteilung angebrachte Austragselemente vorgesehen, so verringert sich der entsprechende Umlaufweg der Füllgutpartikel innerhalb des Trennspalts.As a result of such a configuration, a generic centrifugal mass finishing machine of increased utility value is created. The discharge elements are designed with structurally simple means. The discharge element designed as a projection means that the filling material particles which have penetrated into the gap have only a short residence time. In particular, it cannot happen that they are constantly entrained within the separation gap due to friction, which can lead to an increase in the gap. The product particles shortly after their entry into the gap space, the projections, which are designed according to the invention as hard metal platelets or as brushes, are preferably passed into the interior of the container so that they are subject to further comminution there. The comminution can possibly also be carried out by the discharge element itself, so that the comminuted filling material particles then penetrate the separation gap without causing abrasion. Experiments have shown that no filling material particles whose grain size corresponds to the gap width have been found beyond the separating gap. With regard to the discharge element, this can be an element that rotates with the bottom and / or is fixed to the container wall. It is fundamentally prevented that a multiple circulation of filling material particles takes place within the separation gap, since penetrating filling material particles always have a relative movement both to the surrounding floor and to the fixed container wall. The separating gap can be kept at a predetermined size by the inventive measure over a long period of time. It also does not have the disadvantage that when processing workpieces with the addition of treatment liquid, due to the rapidly increasing gap width, the container leaves the container through the separating gap at an increasing rate, which would make a corresponding supply necessary. If a single discharge element is arranged, it is achieved that the circulation path of filling material particles which have penetrated into the separation gap is less than or at most approximately equal to 360 °. If several discharge elements, preferably arranged in the same angular distribution, are provided, the corresponding circulation path of the filling material particles within the separation gap is reduced.

Eine Variante zeichnet sich dadurch aus, daß das Austragselement als ein an mindestens einer der Wandungen des Trennspaltes befestigter, in diesen vorstehender Vorsprung ausgebildet ist. Sobald dieser gegen die Füllgutpartikel tritt, erfolgt das Austragen derselben auf entsprechende Weise.A variant is characterized in that the discharge element is designed as a protrusion which is fastened to at least one of the walls of the separating gap and projects into it is. As soon as it hits the filling material particles, they are discharged in a corresponding manner.

Es erweist sich als günstig, wenn der Vorsprung eine entgegen der Bewegungsrichtung der Füllgutpartikel weisende Schneide aufweist. Sobald die entsprechenden Füllgutpartikel von der Schneide erfaßt werden, kann im Falle, daß es sich bei dem Füllgutpartikel um einen Schleifkörnersplitter handelt, eine Zerkleinerung auf eine Korngröße erfolgen, wobei die Bruchstücke unterhalb der Größe der Dicke des Trennspaltes liegen. Diese zerkleinerten Teilchen können dann den weiteren Trennspalt weitgehend reibungsfrei durchsetzen. Handelt es sich bei dem eingedrungenen Füllgutpartikel um ein Werkstück oder Werkstückbereich, so wird dieses bzw. dieser in das Behälterinnere zurückgeführt.It has proven to be advantageous if the projection has a cutting edge that points counter to the direction of movement of the filling material particles. As soon as the corresponding filling material particles are gripped by the cutting edge, in the event that the filling material particle is an abrasive grain splinter, it can be reduced to a grain size, the fragments being below the size of the thickness of the separation gap. These crushed particles can then penetrate the further separation gap largely without friction. If the penetrated filling material particle is a workpiece or workpiece area, this or this is returned to the interior of the container.

Die Lebensdauer der Vorsprünge ist dadurch erhöht, wenn sie von mindestens einem Hartmetallplättchen gebildet sind.The service life of the projections is increased if they are formed by at least one hard metal plate.

Ein Doppeleffekt wird dadurch erreicht, wenn die Schneide des Vorsprunges zur Rotationsebene des Bodens derart geneigt verläuft, daß die Schneide entgegen oder in der Drehrichtung zur inneren Bodenrandkante hin ansteigt. Mit der Schneide ist die eine Kante des Hartmetallplättchens gemeint, die eine Schneidenfunktion ausübt. Eine im Querschnitt dreieckförmige Zuspitzung der Schneide ist nicht erforderlich, kann jedoch vorgesehen sein. Der Doppeleffekt besteht darin, daß erstens ein Zerschlagen der entsprechenden Füllgutpartikelchen und durch die Neigung ein anschließendes Hineinfördern derselben in den Behälter stattfindet. Letzteres tritt dann auf, wenn die Schneide entgegen der Drehrichtung des Bodens zur inneren Bodenrandkante hin ansteigt. Ist ein ansteigender Verlauf der Schneide in Drehrichtung gewählt, so führt dieses zu einer Förderung der zerschlagenen Füllgutpartikelchen durch den Trennspalt hindurch nach außen (also aus dem Behälter heraus). Der die Schneide ausbildende Vorsprung kann entweder am Boden oder am Behälter angebracht sein. Sodann ist die Möglichkeit gegeben, den einen Vorsprung am Boden und den anderen am Behälter vorzusehen derart, daß sie sich nicht bei einem Umlauf nachteilig beeinträchtigen.A double effect is achieved if the cutting edge of the projection is inclined to the plane of rotation of the base in such a way that the cutting edge rises in the opposite direction or in the direction of rotation to the inner edge of the base edge. The cutting edge means the one edge of the hard metal plate that has a cutting function. A tapering of the cutting edge with a triangular cross section is not necessary, but can be provided. The double effect is that, firstly, the corresponding filling material particles are smashed and subsequently inclined to be conveyed into the container. The latter occurs when the cutting edge rises towards the inner edge of the bottom against the direction of rotation of the bottom. If an increasing course of the cutting edge in the direction of rotation is selected, this leads to a conveyance of the broken particles of the filling material through the separating gap to the outside (i.e. from the Container out). The projection forming the cutting edge can be attached either to the bottom or to the container. Then there is the possibility of providing one projection on the bottom and the other on the container in such a way that they do not adversely affect one cycle.

Weitere Variationen sind dadurch möglich, daß mindestens zwei Vorsprünge jeweils mit Schneiden vorgesehen sind, die zur Rotationsebene des Bodens derart geneigt verlaufen, daß die eine entgegen und die andere in Drehrichtung zur inneren Bodenrandkante hin ansteigt. Die Festlegung beider Schneiden kann entweder am Boden oder auch am Behälter erfolgen. Ebenfalls ist eine Anordnung denkbar, bei welcher sich die eine Schneide am Boden und die andere am Behälter befindet.Further variations are possible in that at least two projections are each provided with cutting edges which are inclined to the plane of rotation of the base in such a way that one rises in the opposite direction and the other in the direction of rotation towards the inner edge of the base. Both cutting edges can be fixed either on the bottom or on the container. An arrangement is also conceivable in which one cutting edge is on the bottom and the other is on the container.

Um innerhalb des Trennspaltes auf unterschiedlichen Höhenlagen befindliche Füllgutpartikel gut erfassen zu können, sind mehrere Vorsprünge bzw. Hartmetallplättchen reihenförmig hintereinanderliegend vorgesehen.In order to be able to easily detect filling material particles located at different heights within the separating gap, a plurality of projections or hard metal plates are provided in rows one behind the other.

Von Vorteil erweist es sich, wenn die Hartmetallplättchen einen parallelogrammartigen Grundriß besitzen, so daß dann die oberen Parallelogrammkanten die Schneiden darstellen.It proves advantageous if the hard metal plates have a parallelogram-like plan, so that the upper parallelogram edges then represent the cutting edges.

Eine Möglichkeit, die Hartmetallplättchen dauerhaft an einer der Wandungen des Trennspaltes anzubringen, besteht darin, daß das Hartmetallplättchen mindestens eine Bohrung aufweist, die von einer Befestigungsschraube durchgriffen ist, deren Kopf innerhalb einer Einsenkung der Bohrung liegt. Das Befestigen des Hartmetallplättchens und ein eventueller Austausch desselben ist auf diese Weise einfach vornehmbar.One way of permanently attaching the hard metal plate to one of the walls of the separation gap is for the hard metal plate to have at least one hole through which a fastening screw passes, the head of which lies within a depression in the hole. The attachment of the hard metal plate and a possible exchange of the same can be carried out easily in this way.

Wird das Hartmetallplättchen dem Boden zugeordnet, ist es von Vorteil, wenn das Schaftende der Befestigungsschraube in eine Verstärkungseinlage des eine Kunststoffummantelung aufweisenden Bodens eingeschraubt ist. Neben einer Versteifung des Bodens dient die Verstärkungseinlage somit auch zur Halterung des Hartmetallplättchens.If the hard metal plate is assigned to the floor, it is advantageous if the shaft end of the fastening screw is in a reinforcement insert of the bottom having a plastic covering is screwed in. In addition to stiffening the floor, the reinforcement insert also serves to hold the hard metal plate.

Um die Festlegung des Hartmetallplättchens zu optimieren, liegt dieses in einer Ausnehmung der Wandung des Trennspaltes ein. Diese Ausnehmung kann sich am Behälter (Wandung) und/oder am Boden befinden.In order to optimize the fixing of the hard metal plate, it lies in a recess in the wall of the separation gap. This recess can be located on the container (wall) and / or on the bottom.

Erfindungsgemäße ist nach Anspruch 2 das Austragungselement als Bürste ausgebildet, durch welche der austragende Effekt auf in den Trennspalt eingetretene Partikel ausgeübt wird. Es bietet sich dabei an, die Bürste nachstellbar und austauschbar anzuordnen. Es ist hierdurch eine Anpassung auf die Spaltbreite gegeben, so daß auch nach entsprechendem Verschleiß der Borsten oder eventuell der Wandungen des Trennspalts stets eine funktionsgerechte Stellung gewährleistet ist.According to the invention, the discharge element is designed as a brush, by means of which the discharge effect is exerted on particles that have entered the separation gap. It is advisable to arrange the brush in an adjustable and replaceable manner. This results in an adaptation to the gap width, so that a functional position is always guaranteed even after the bristles or possibly the walls of the separation gap have worn out.

Das Zurückfördern von Füllgutpartikeln in das Behälterinnere ist dadurch gewährleistet, daß sich die Bürste bis zur Bodenrandkante erstreckt.The return of filling material particles into the interior of the container is ensured in that the brush extends to the edge of the bottom edge.

In vorteilhafter Weise kann die Bürste an einem auswechselbaren Abschnitt der Wandung des Trennspaltes angeordnet sein, wobei der Abschnitt mittels Führungen radial gehalten und von der Bodenunterseite her einsteckbar ist. Letzteres erleichtert das Auswechseln und Nachstellen. Ferner entstehen keine Nischen, in welche die Füllgutpartikelchen eintreten und verbleiben könnten. Die Bürsten haben einen ähnlichen Austrageffekt wie die vorgenannte Schneidenkonstruktion.The brush can advantageously be arranged on an exchangeable section of the wall of the separating gap, the section being held radially by means of guides and being insertable from the bottom underside. The latter makes it easier to replace and readjust. Furthermore, there are no niches into which the product particles can enter and remain. The brushes have a discharge effect similar to that of the aforementioned cutter construction.

Eine besonders einfache Lösung ist darin zu sehen, daß die Behälterwandung von mindestens einer zum Trennspalt führenden Gewindebohrung durchsetzt ist, in die ein mit Außengewinde versehener Bürstenträger eingeschraubt ist, der stirnseitig mit Borsten versehen ist. Der Bürstenträger selbst kann durch eine Kontermutter gegen Selbstverstellung gesichert werden. Denkbar ist auch eine reibungsschlüssige selbstsichernde Anordnung des Bürstenträgers innerhalb der Gewindebohrung. Es besteht grundsätzlich von außen her eine einfach durchzuführende Nachstellbarkeit des Bürstenträgers, so daß die verschleißfesten Borsten des Bürstenträgers stets um den entsprechenden Betrag in den Trennspalt hineinragen. Werden mehrere Bürstenträger dicht hintereinanderliegend in ansteigender Anordnung vorgesehen, so kann auch mit ihnen ein solcher Austragseffekt erreicht werden, wie ihn die schräg ansteigende Schneide verwirklicht.A particularly simple solution can be seen in the fact that the container wall of at least one leading to the separation gap Threaded hole is penetrated, into which a brush holder provided with an external thread is screwed, which is provided with bristles on the end face. The brush holder itself can be secured against self-adjustment by a lock nut. A frictionally self-locking arrangement of the brush holder within the threaded bore is also conceivable. Basically, there is an easy adjustment of the brush holder from the outside, so that the wear-resistant bristles of the brush holder always protrude into the separation gap by the appropriate amount. If a plurality of brush holders are arranged one behind the other in an increasing arrangement, then such a discharge effect can also be achieved with them as the obliquely rising cutting edge realizes.

Eine Weiterbildung ist durch eine Bürste gekennzeichnet, die sich über 360° erstreckt. Sie kann an der bodenseitigen Spaltwand oder an der behälterseitigen Spaltwand angeordnet sein. Denkbar ist auch der Einsatz von zwei 360°-Bürsten (eine am Boden, die andere am Behälter).A further development is characterized by a brush that extends over 360 °. It can be arranged on the bottom-side gap wall or on the container-side gap wall. It is also conceivable to use two 360 ° brushes (one on the bottom, the other on the container).

Die Einsatzpalette der Fliehkraft-Gleitschleifmaschine läßt sich durch die, sich über 360° erstreckende Bürste erhöhen, da hierdurch z. B. insbesondere die Möglichkeit eröffnet wird, entsprechende Werkstücke ohne Bearbeitungskörper oberflächenzubehandeln, denn selbst dann, wenn die Werkstücke sehr klein sein sollten oder Vorstände ausbilden, die in den Spalt eintreten könnten, ist keine Gefahr für den Spalt gegeben, da die Bürste ein Eindringen verhindert.The range of applications of the centrifugal vibratory grinding machine can be increased by the brush, which extends over 360 °, as this z. B. in particular the possibility is opened to surface-treat corresponding workpieces without a machining body, because even if the workpieces should be very small or train members who could enter the gap, there is no danger for the gap, since the brush prevents penetration .

Damit das Eintreten zu großer Füllgutpartikelchen in den Trennspalt verhindert ist, kann die Bürste an der Wandung des Bodens oder an der Wandung des Behälters angeordnet sein.The brush can be arranged on the wall of the bottom or on the wall of the container in order to prevent the particles of large filling material from entering the separation gap.

Alternativ sind auch zwei solcher Bürsten einsetzbar, wovon die eine an der Wandung des Bodens und die andere an der Wandung des Behälters angeordnet ist. Die Anordnung läßt sich dabei in Übereinanderlage vorsehen.Alternatively, two such brushes can also be used, one of which is arranged on the wall of the base and the other on the wall of the container. The arrangement can be provided one above the other.

Gemäß einer vorteilhaften Weiterbildung der Erfindung wird in den Spalt unter Druck ein Wasserstrahl eingedüst. Durch das eingedüste Wasser wird die von den als Hartmetallplättchen oder Bürste ausgebildeten Vorsprüngen bewirkte Austragung der Füllgutteilchen aus dem Trennspalt wirksam unterstützt. Es findet hier eine partielle Eindüsung statt, so daß bei Anordnung eines einzigen Wasserstrahls der Umlauf eines Füllgutpartikels innerhalb des Trennspaltes nie größer als 360° wird.According to an advantageous development of the invention, a water jet is injected into the gap under pressure. The sprayed-in water effectively supports the discharge of the filling material particles from the separation gap, which is caused by the projections designed as hard metal plates or brushes. A partial injection takes place here, so that when a single water jet is arranged, the circulation of a product particle within the separation gap never becomes greater than 360 °.

Das Austragen der Füllgutpartikelchen aus dem Trennspalt ist dadurch besonders wirksam, daß der Wasserstrahl etwa in Richtung des Trennspaltes verläuft.The discharge of the product particles from the separation gap is particularly effective in that the water jet runs approximately in the direction of the separation gap.

Um hierbei die Füllgutpartikelchen stets in den Behälter zurückfördern zu können, ist eine Ausrichtung des Wasserstrahls in Richtung auf das Behälterinnere vorgesehen.In order to always be able to convey the filling material particles back into the container, an alignment of the water jet in the direction of the container interior is provided.

Einerseits ist es möglich, die Strahldüse ortsfest, also am Behälter selbst anzuordnen.On the one hand, it is possible to arrange the jet nozzle in a stationary manner, that is to say on the container itself.

Andererseits besteht jedoch auch die Möglichkeit, die Strahldüse mit dem Boden umlaufen zu lassen. Auch ist eine Kombination beider Möglichkeiten denkbar.On the other hand, there is also the option of rotating the jet nozzle with the bottom. A combination of both options is also conceivable.

Werden mehrere an ein Verteilerrohr angeschlossene Strahldüsen vorgesehen, so kann eine solche Ausrichtung vorgesehen sein, daß sie in ansteigender Höhenlage hintereinander liegen, um den Austrageffekt der in den Trennspalt eingetretenen Füllgutpartikelchen zu erhöhen.If several jet nozzles connected to a distributor pipe are provided, such an alignment can be provided that they lie one behind the other at an increasing altitude in order to increase the discharge effect of the filling material particles which have entered the separation gap.

Letzteres läßt sich in einfacher Weise dadurch erreichen, daß die Strahldüsen unterschiedlichen Abstand zur inneren Bodenrandkante besitzen. Dies kann durch eine geneigte Anordnung des Verteilerrohrs mit den daran angeschlossenen Strahldüsen erreicht werden. Die partielle Anordnung der Strahldüsen führt dabei zu keiner Durchströmsperre der aus dem Behälter abfließenden Behandlungsflüssigkeit. Der Schlammabtransport ist also nicht behindert. Denkbar ist, daß der eingedüste Flüssigkeitsstrahl zugleich ganz oder teilweise die Befeuchtung des Behälterinhaltes (Behandlungsmittel) bewirkt.The latter can be achieved in a simple manner in that the jet nozzles are at different distances from the inner edge of the bottom edge. This can be achieved by an inclined arrangement of the distributor pipe with the jet nozzles connected to it. The partial arrangement of the jet nozzles does not block the flow of the treatment liquid flowing out of the container. The sludge removal is not hindered. It is conceivable that the jet of liquid injected at the same time wholly or partially moistens the contents of the container (treatment agent).

Den Ausbringeffekt der in den Trennspalt eingedrungenen Füllgutpartikelchen kann man in einfacher Weise dadurch verbessern, daß die Strahldüse in eine ihr vorgelagerte Nische der Wandung des Trennspaltes mündet. Sobald die Partikel in die Nische eintreten,werden sie nicht mehr mitgenommen; sie werden frei und können durch den Wasserstrahl besser in den Behälterinnenraum zurückbewegt werden.The spreading effect of the product particles which have penetrated into the separation gap can be improved in a simple manner by the jet nozzle opening into a niche in front of it in the wall of the separation gap. As soon as the particles enter the niche, they are no longer taken away; they become free and can be better moved back into the container interior by the water jet.

Nachstehend werden mehrere Ausführungsbeispiele der Erfindung anhand der Figuren 1 bis 8 erläutert. Es zeigt

  • Fig. 1 einen teilweisen Längsschnitt durch die Fliehkraft-Gleitschleifmaschine gemäß der ersten Ausführungsform, wobei das in Form eines Vorsprunges ausgebildete Austragselement Hartmetallplättchen sind,
  • Fig. 2 in vergrößerter Darstellung einen Ausschnitt im Bereich der Behälterwandung und des Bodens mit in dessen Wandung eingelassenen Hartmetallplättchen,
  • Fig. 3 einen Vertikalschnitt durch den Behälter und Boden im Bereich eines Hartmetallplättchens,
  • Fig. 4 eine der Fig. 2 entsprechende Darstellung, wobei ein einziges, langgestrecktes Hartmetallplättchen am Boden vorgesehen ist gemäß einer Abwandlungsform der Hartmetallplättchen-Lösung,
  • Fig. 5 eine der Fig. 4 entsprechende Darstellung, wobei das dem Boden zugeordnete Austragselement als Bürste ausgebildet ist,
  • Fig. 6 einen Vertikalschnitt durch Fig. 5 auf Höhe der Bürste,
  • Fig. 7 einen Vertikalschnitt betreffend eine weitere Bürstenlösung,
  • Fig. 8 ebenfalls einen Vertikalschnitt, welcher die Kombination der Bürsten- und Wasserstrahl-Lösung beinhaltet.
Several exemplary embodiments of the invention are explained below with reference to FIGS. 1 to 8. It shows
  • 1 is a partial longitudinal section through the centrifugal slide grinding machine according to the first embodiment, the discharge element in the form of a projection being hard metal plates,
  • 2 is an enlarged view of a section in the area of the container wall and the bottom with hard metal plates embedded in the wall thereof,
  • 3 shows a vertical section through the container and bottom in the area of a hard metal plate,
  • 4 shows a representation corresponding to FIG. 2, a single, elongated hard metal plate being provided on the bottom in accordance with a modification of the hard metal plate solution,
  • 5 shows a representation corresponding to FIG. 4, the discharge element assigned to the base being designed as a brush,
  • 6 is a vertical section through FIG. 5 at the level of the brush,
  • 7 shows a vertical section relating to a further brush solution,
  • Fig. 8 also a vertical section, which includes the combination of the brush and water jet solution.

Teil der Fliehkraft-Gleitschleifmaschine ist ein um eine nicht dargestellte horizontale Achse schwenkbares Traggestell 1. Dieses besitzt einen Flansch 2, an welchen sich ein vorzugsweise aus Polyurethan bestehender Behälter 3 anschließt. Dessen Boden 4 rotiert relativ zur Behälterwandung 5 um eine vertikal ausgerichtete Behälterachse 6. Zwischen Boden 4 und Behälterwandung 5 wird ein Trennspalt 7 gebildet. Letzterer verläuft ansteigend zur inneren Bodenrandkante 8. Das bedeutet, daß der Boden 4 - im Querschnitt gesehen - zumindest auf Höhe des Trennspaltes 7 Kegelstumpfform besitzt derart, daß die Basis dem Behälterinneren zugekehrt ist.Part of the centrifugal vibratory grinding machine is a support frame 1 which can be pivoted about a horizontal axis (not shown). This has a flange 2 to which a container 3, preferably made of polyurethane, is connected. Its bottom 4 rotates relative to the container wall 5 about a vertically aligned container axis 6. A separating gap 7 is formed between the bottom 4 and the container wall 5. The latter extends ascending to the inner edge 8 of the bottom edge. This means that the bottom 4 - seen in cross section - at least at the level of the separation gap 7, the shape of a truncated cone has such that the base faces the inside of the container.

Auf Höhe des Trennspaltes 7 ist die Behälterwandung 5 mit einer ringförmigen Auskleidung 9 bestückt, die hoch verschleißfest ist und gegebenenfalls ein Auswechseln gestattet.At the level of the separation gap 7, the container wall 5 is equipped with an annular lining 9, which is highly wear-resistant and, if necessary, allows replacement.

Der Boden 4 seinerseits ist tellerförmig gestaltet derart, daß sich an den Tellergrund die Behälterwandung 5 anschließt.The bottom 4 is in turn plate-shaped in such a way that the container wall 5 adjoins the plate base.

Der Behälter 3 nimmt nicht dargestelltes, aus Werkstücken und Bearbeitungskörpern bestehendes Füllgut auf unter Zugabe von Behandlungsflüssigkeit. Für die Oberflächenbearbeitung der Werkstücke treibt ein am Traggestell 1 befestigter Antriebsmotor 10 über einen Riementrieb 11 den Boden 4 an. Das Gemisch aus Bearbeitungskörpern, Werkstücken und Behandlungsflüssigkeit wird durch den rotierenden Boden 4 an die Behälterinnenwand des Behälters 3 gedrückt und nach oben befördert. Von dort gleitet es zur Mitte des rotierenden Bodens 4 zurück. Zufolge der Drehung des Bodens 4 entsteht im Behälter 3 ein eine Wendelbewegung ausführender Ringwulst, der von dem Behälterinhalt gebildet ist.The container 3 receives filling material, not shown, consisting of workpieces and processing bodies with the addition of treatment liquid. For the surface processing of the workpieces, a drive motor 10 fastened to the support frame 1 drives the floor 4 via a belt drive 11. The mixture of processing bodies, workpieces and treatment liquid is pressed through the rotating base 4 against the inner wall of the container 3 and transported upwards. From there it slides back to the center of the rotating floor 4. As a result of the rotation of the base 4, an annular bead is formed in the container 3, which is formed by the contents of the container.

Wie Fig. 1 veranschaulicht, kann während der Bearbeitung der Werkstücke der Behälter durch einen Deckel 12 verschlossen sein.As illustrated in FIG. 1, the container can be closed by a cover 12 during the machining of the workpieces.

Um zu verhindern, daß in den Trennspalt 7 eintretende Füllgutpartikel von Trennspaltbreite innerhalb des Trennspaltes stetig umlaufen und dadurch den Verschleiß der einander gegenüberliegenden Wandungen 13, 14 von Boden 4 und Auskleidung 9 fördern, sind gemäß Fig. 1 bis 3 Austragselemente A in Form von Vorsprüngen vorgesehen, die ihrerseits als Hartmetallplättchen 15 gestaltet sind. Es sind auf Höhe des Trennspaltes 7 drei reihenförmig hintereinanderliegende Hartmetallplättchen 15 vorgesehen, die einen parallelogrammartigen Grundriß besitzen. Hierdurch bilden die oberen Parallelogrammkanten 16 eine Schneide S, die entgegen der Drehrichtung x zur inneren Bodenrandkante 8 hin ansteigt. Dies sieht so aus, daß die Schneide S des unteren Hartmetallplättchens 15 einen größeren Abstand zur Bodenrandkante 8 besitzt als die Schneiden der höherliegenden Hartmetallplättchen 15. Zur Festlegung jedes Hartmetallplättchens 15 weist dieses eine Bohrung 17 auf, durch welche eine Befestigungsschraube 18 hindurchtritt. Damit deren Kopf 19 das Plättchen 15 nicht überragt, liegt er innerhalb einer Einsenkung 20 der Bohrung 17 des Hartmetallplättchens 15 ein. Das Schaftende der Befestigungsschraube 18 ist in eine Verstärkungseinlage 21 des eine Kunststoffummantelung 22 aufweisenden Bodens 4 eingeschraubt. Wie Fig. 3 veranschaulicht, liegt das Hartmetallplättchen 15 in einer Ausnehmung 23 der Wandung 13 des Trennspaltes 7 ein. Bezüglich der Wandung 13 handelt es sich um diejenige des Bodens 4. Die Ausnehmung 23 reicht bis zur Verstärkungseinlage 21, so daß das Hartmetallplättchen gegen diese verspannt werden kann. Die Drehsicherung des Hartmetallplättchens ist dabei durch die Ausnehmung 23 erzielt.In order to prevent filling material particles of separation gap width entering the separation gap 7 from circulating continuously within the separation gap and thereby promoting the wear of the opposing walls 13, 14 of base 4 and lining 9, discharge elements A in the form of projections are shown in FIGS. 1 to 3 provided, which in turn are designed as a hard metal plate 15. There are three rows one behind the other at the level of the separation gap 7 Carbide plates 15 are provided, which have a parallelogram-like plan. As a result, the upper parallelogram edges 16 form a cutting edge S which rises towards the inner edge 8 of the bottom edge counter to the direction of rotation x. This looks so that the cutting edge S of the lower hard metal plate 15 has a greater distance from the edge 8 of the bottom edge than the cutting edges of the higher hard metal plate 15. To fix each hard metal plate 15, this has a bore 17 through which a fastening screw 18 passes. So that the head 19 does not protrude above the plate 15, it lies within a depression 20 of the bore 17 of the hard metal plate 15. The shaft end of the fastening screw 18 is screwed into a reinforcing insert 21 of the base 4, which has a plastic casing 22. As illustrated in FIG. 3, the hard metal plate 15 lies in a recess 23 in the wall 13 of the separation gap 7. With regard to the wall 13, this is that of the base 4. The recess 23 extends as far as the reinforcing insert 21, so that the hard metal plate can be braced against it. The rotation of the hard metal plate is achieved through the recess 23.

Der Uberstand der Hartmetallplättchen 15 ist etwas geringer als die Spaltbreite. Gelangen Füllgutpartikel in den Trennspalt, so laufen sie in diesem nur solange um, bis sie von den Hartmetallplättchen 15 erfaßt und zerkleinert werden. Die Gefahr einer Trennspaltvergrößerung durch die zerkleinerten Teilchen tritt dann nicht mehr auf, welche Teilchen mit der Behandlungsflüssigkeit ausgeschwemmt werden. Eventuell werden die Füllgutpartikelchen auch durch die ansteigenden Schneiden 16 der Hartmetallplättchen 15 in den Behälterinnenraum zurückgeleitet.The protrusion of the hard metal platelets 15 is slightly less than the gap width. If filling material particles get into the separation gap, they only run around in this until they are gripped and crushed by the hard metal plate 15. The danger of the separation gap being enlarged by the comminuted particles then no longer occurs which particles are washed out with the treatment liquid. The filling material particles may also be returned to the interior of the container through the rising cutting edges 16 of the hard metal plates 15.

Anstatt die Hartmetallplättchen zu verschrauben, könnten sie zusätzlich oder auch alleinig durch Kleben befestigt sein.Instead of screwing the hard metal plates, they could be attached additionally or solely by gluing.

Die in Fig. 4 aufgezeigte Hartmetallplättchen-Lösung unterscheidet sich von der vorherbeschriebenen darin, daß mehrere Hartmetallplättchen zu einem einzigen, längsgestreckten Hartmetallplättchen 24 zusammengefaßt sind. Es liegt nun eine durchgehende Schneide S1 gleicher Ausrichtung vor. Dieses längsgestreckte Hartmetallplättchen 24 ist mittels dreier Befestigungsschrauben 18 in äquivalenter Weise am Boden 4 befestigt. Ansonsten tragen gleiche Bauteile gleiche Bezugsziffern.The hard metal flake solution shown in FIG. 4 differs from the one described above in that several hard metal flakes are combined to form a single, elongated hard metal flake 24. There is now a continuous cutting edge S1 with the same orientation. This elongated hard metal plate 24 is attached to the bottom 4 in an equivalent manner by means of three fastening screws 18. Otherwise, the same components have the same reference numbers.

Bei beiden vorgenannten Ausführungsformen ist es möglich, mehrere Hartmetallplättchen umfangsverteilt am Boden anzuordnen. Auch könnten die Hartmetallplättchen an der Wandung 14 des Behälters 3 vorgesehen sein. Wie aus der strichpunktierten Darstellung in Fig. 2 hervorgeht, können die Hartmetallplättchen 15 auch so ausgerichtet sein, daß ihre Schneiden S in Drehrichtung x zur inneren Bodenrandkante 8 hin ansteigen. Alternativ wäre es möglich, zwei Reihen von Hartmetallplättchen 15 einzusetzen, bei welchen die Schneiden der einen Reihe in und die Schneiden der anderen Reihe entgegen der Drehrichtung des Bodens 4 ansteigen. Anstatt beide Schneiden am Boden 4 anzuordnen, könnten sie auch am Behälter angebracht sein. Eine weitere Möglichkeit ließe sich dadurch verwirklichen, die eine Reihe der Hartmetallplättchen mit entsprechender Ausrichtung am Boden und die andere am Behälter zu fixieren.In both of the aforementioned embodiments, it is possible to arrange a plurality of hard metal platelets distributed circumferentially on the floor. The hard metal plates could also be provided on the wall 14 of the container 3. As can be seen from the dash-dotted representation in FIG. 2, the hard metal plates 15 can also be oriented such that their cutting edges S rise in the direction of rotation x towards the inner edge 8 of the bottom edge. Alternatively, it would be possible to use two rows of hard metal plates 15, in which the cutting edges of one row rise and the cutting edges of the other row rise counter to the direction of rotation of the base 4. Instead of arranging both cutting edges on the bottom 4, they could also be attached to the container. Another possibility could be realized by fixing one row of the hard metal plates with the appropriate orientation on the bottom and the other on the container.

Bei der in den Fig. 5 und 6 abgewandelten Bauform tragen ebenfalls gleiche Bauteile gleiche Bezugsziffern. Abweichend von den vorbeschriebenen Ausführungsformen ist nun das Austragselement A als Bürste 25 ausgebildet. Sie befindet sich an einem auswechselbaren Abschnitt 26 der Wandung 13 des Bodens 4. Dieser Abschnitt 26 ist in Einsteckrichtung mit seitlichen Schwalbenschwanzabschnitten 27 versehen, die in entsprechend hinterschnittene Nuten 28 der Wandung 13 eingreifen. Auf diese Weise ist der Abschnitt 26 in radialer Richtung am Boden 4 gehalten. Gegebenenfalls kann eine nicht veranschaulichte Maßnahme getroffen sein, um die Bürste 25 von der Bodenunterseite her einstellbar zu machen. Gesichert ist die eingeschobene Lage der Borsten 29 besitzenden Bürste 25 durch in den Boden 4 eingedrehte Schrauben 30.5 and 6, the same components also have the same reference numbers. In a departure from the above-described embodiments, the discharge element A is now designed as a brush 25. It is located on an exchangeable section 26 of the wall 13 of the base 4. This section 26 is provided in the insertion direction with lateral dovetail sections 27 which engage in correspondingly undercut grooves 28 in the wall 13. In this way, the section 26 is held on the bottom 4 in the radial direction. If necessary, a measure (not illustrated) can be taken to make the brush 25 adjustable from the bottom underside. The inserted position of the brush 25 having bristles 29 is secured by screws 30 screwed into the base 4.

Wie Fig. 5 veranschaulicht, besitzt die Bürste 25 eine Auflaufschräge 31, die entgegen der Drehrichtung x bis zur inneren Bodenrandkante 8 hin ansteigt. Im übrigen erstreckt sich die Auflaufschräge 31 über die gesamte Höhe des Trennspaltes 7. Es ist somit gewährleistet, daß in den Bereich der Bürste 25 gelangende Füllgutpartikel aus dem Trennspalt hinausbefördert werden.As illustrated in FIG. 5, the brush 25 has a run-up slope 31 which rises up to the inner edge 8 of the bottom against the direction of rotation x. Otherwise, the run-up slope 31 extends over the entire height of the separation gap 7. It is thus ensured that filling material particles reaching the area of the brush 25 are conveyed out of the separation gap.

Eine weitere Bürstenlösung ist in Fig. 7 veranschaulicht. Auf Höhe des Trennspaltes 7, der Bodenrandkante 8 benachbart, ist die Behälterwandung 5 von einer Gewindebohrung 32 durchsetzt. Letztere dient zur Aufnahme eines mit einem Außengewinde 33 versehenen Bürstenkörpers 34, dessen innenliegendes Ende in den Trennspalt 7 ragende Borsten 35 aufnimmt. Eine sich an der Außenseite der Behälterwandung 5 abstützende Kontermutter 36 sichert die eingeschraubte Stellung des Bürstenkörpers 34. Bezüglich der Borsten 35 handelt es sich um verschleißfestes Borstenmaterial. Nach etwaigem Verschleiß ist jedoch eine Verstellung des Bürstenkörpers 34 in radialer Richtung möglich. Es können mehrere solcher Bürstenkörper 34 vorgesehen sein derart, daß diese zum Beispiel hintereinanderliegen und in unterscheidlicher Höhenlage angeordnet sind derart, daß sich ein ansteigender Verlauf entgegen der Drehrichtung des Bodens ergibt. Die in den Trennspalt 7 eindringenden größeren Füllgutpartikel werden dann durch einen bzw. durch mehrere Bürstenkörper ausgetragen.Another brush solution is illustrated in FIG. 7. At the level of the separation gap 7, the edge 8 of the bottom edge, the container wall 5 is penetrated by a threaded bore 32. The latter serves to receive a brush body 34 provided with an external thread 33, the inner end of which receives bristles 35 projecting into the separating gap 7. A lock nut 36, which is supported on the outside of the container wall 5, secures the screwed-in position of the brush body 34. The bristles 35 are wear-resistant bristle material. After any wear, however, an adjustment of the brush body 34 in the radial direction is possible. A plurality of such brush bodies 34 can be provided such that they lie one behind the other and are arranged at different heights in such a way that there is an increasing course against the direction of rotation of the base. The larger filling material particles penetrating into the separation gap 7 are then discharged through one or more brush bodies.

Beim Ausführungsbeispiel gemäß Figur 8 ist den als Bürsten ausgebildeten Austragungselementen A eine Strahldüse 37 zugeordnet, welche den Wasserstrahl etwa in Richtung des Trennspaltes 7 und in Richtung auf das Behälterinnere sprüht. Die Strahldüse 37 befindet sich am Ende eines den Flansch 2 durchsetzenden Rohrs 38. Anstatt einer einzigen Strahldüse 37 können jedoch auch mehrere in gleicher Umfangsverteilung vorgesehen sein. Der aus der Strahldüse 37 gelangte Wasserstrahl fördert in den Trennspalt 7 eingetretene Füllgutpartikel entsprechender Korngröße in das Behälterinnere. Der Boden 4 ist ferner mit einer Bürste 25 gemäß Figur 5 und 6 bestückt. Zwischen Strahldüse 37 und Bürste liegt in Umfangsrichtung ein Versatz vor. Hierdurch ist gewährleistet, daß sich Wasserstrahl und Bürste nicht gegenseitig beeinträchtigen und der Wasserstrahl ungehindert auf etwaige Partikel gelenkt werden kann.In the exemplary embodiment according to FIG. 8, the discharge elements A designed as brushes are assigned a jet nozzle 37 which sprays the water jet approximately in the direction of the separation gap 7 and in the direction of the interior of the container. The jet nozzle 37 is located at the end of a tube 38 passing through the flange 2. Instead of a single jet nozzle 37, however, several can be provided in the same circumferential distribution. The water jet coming from the jet nozzle 37 conveys filler particles of corresponding grain size that have entered the separation gap 7 into the interior of the container. The bottom 4 is also equipped with a brush 25 according to Figures 5 and 6. There is an offset in the circumferential direction between the jet nozzle 37 and the brush. This ensures that the water jet and the brush do not interfere with each other and the water jet can be directed unhindered to any particles.

Weitere Kombinationen innerhalb des Schutzumfangs der Ansprüche wären möglich, die alle das gemeinsame Ziel haben, die Verweildauer von in den Trennspalt eingetretenen größeren Füllgutpartikeln erheblich zu verkürzen unter Reduzierung des Trennspaltverschleißes auf ein Minimum. Insbesondere kann bei Ausgestaltungen mit einer Wasserstrahldüse diese auch dem rotierenden Boden zugeordnet sein. Die Strahldüse kann dann ebenfalls in den Trennspalt münden, wobei bevorzugt im Trennspalt eine muldenartige Nische vorgesehen ist, in welche die Strahldüse mündet.Further combinations within the scope of the claims would be possible, all of which have the common goal of significantly reducing the dwell time of larger filling material particles that have entered the separation gap while reducing the wear of the separation gap to a minimum. In particular, in embodiments with a water jet nozzle, this can also be assigned to the rotating floor. The blasting nozzle can then also open into the separating gap, a trough-like recess preferably being provided in the separating gap, into which the blasting nozzle opens.

Claims (25)

1. Centrifugal sliding grinder with a receptacle (3) which holds filler material consisting of workpieces and machining bodies and the bottom (4) of which rotates relative to the receptacle wall (5) about the receptacle axis and leaves a gap (7) between it and the receptacle wall (5), with at least one discharge element (A) entering the gap and rotating with the bottom (4) or fixed to the receptacle wall (5), for removing particles of filler material which have entered the gap, characterised in that the discharge element (A), which is attached to at least one of the walls (13, 14) of the gap (7) and is constructed as a projection protruding into the gap (7), is formed by at least one hard metal plate (15 or 24).
2. Centrifugal sliding grinder with a receptacle (3) which holds filler material consisting of workpieces and machining bodies and the bottom (4) of which rotates relative to the receptacle wall (5) about the receptacle axis and leaves a gap (7) between it and the receptacle wall (5), with at least one discharge element (A) entering the gap and rotating with the bottom (4) or fixed to the receptacle wall (5), for removing particles of filler material which have entered the gap, characterised in that the discharge element (A), which is attached to at least one of the walls (13, 14) of the gap (7) and is constructed as a projection protruding into the gap (7), is formed as a brusch (25).
3. Centrifugal sliding grinder according to claim 1, characterised in that the projection comprises a cutting edge (S, S1) pointing in the direction opposite the direction of travel of the particles of filler material.
4. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the cutting edge (S, S1) of the projection is at such an angle to the plane of rotation of the bottom (4) that the cutting edge (S, S1) ascends towards the inner edge (8) of the bottom (4) in or opposite the direction of rotation (x).
5. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that two or more projections are each provided with cutting edges (S, S1) which are at such an angle to the plane of rotation of the bottom (4) that one ascends towards the inner edge (8) of the bottom (4) opposite the direction of rotation (x) and the other in the direction of rotation (x).
6. Centrifugal sliding grinder according to one or more of the preceding claims, characterised by several hard metal plates (15) located in a row one behind the other.
7. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that each hard metal plate (15, 24) has a parallelogram-shaped contour.
8. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the hard metal plate (15, 24) comprises at least one bore (17) through which extends a fixing screw (18) the head (19) of which is located within a countersink recess (20) of the bore (17).
9. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the shank end of the fixing screw (18) is screwed into a reinforcing inlay (21) of the bottom (4) comprising a plastic sheath (22).
10. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the hard metal plate (15, 24) lies partly in a recess (23) in the wall (13 or 14) of the gap (7).
11. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the brush (25) extends as far as the edge (8) of the bottom (4).
12. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the brusch (25) is resettable and exchangeable.
13. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the brush (25) is mounted on an exchangeable section (26) of the wall of the gap (7), wherein the section (26) is held radially by means of guides (27, 28) and can be inserted from the underside of the bottom (4).
14. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that through the receptacle wall (5) extends at least one threaded bore (32) which leads to the gap (7) and into which is screwed a brush body (34) provided with an external thread (33), which comprises bristles (35) at its front end.
15. Centrifugal sliding grinder according to one or more of the preceding claims, characterised by one or two brush(es) extending over 360°.
16. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the brush is mounted on the wall (13) of the bottom (4) or on the wall (14) of the receptacle (3).
17. Centrifugal sliding grinder according to one or more of the preceding claims, characterised by two brushes, one of which is mounted on the wall (13) of the bottom (4) and the other on the wall (14) of the receptacle (3).
18. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that in addition to the discharge element (A), at least one water jet injected under pressure into the gap (7) is provided.
19. Centrifugal sliding grinder according to claim 18, characterised in that the water jet extends approximately in the direction of the gap (7).
20. Centrifugal sliding grinder according to claim 18, characterised in that the water jet is directed towards the interior of the receptacle (3).
21. Centrifugal sliding grinder according to one or more of the preceding claims, characterised by a stationay jet nozzle (37).
22. Centrifugal sliding grinder according to one or more of the preceding claims, characterised by a jet nozzle (39, 43, 44) rotating with the bottom (4).
23. Centrifugal sliding grinder according to claim 20, characterised in that the jet nozzles (43) are spaced by different distances apart from the inner edge (8) of the bottom (4).
24. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the jet nozzle (44) opens into a recess (45) mounted in front of it in the wall (13) of the gap (7).
25. Centrifugal sliding grinder according to one or more of the preceding claims, characterised in that the recess (45) is located at a distance from the inner edge (8) of the bottom (4).
EP89106259A 1988-04-18 1989-04-08 Centrifugal polishing machine Expired - Lifetime EP0338359B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812908A DE3812908A1 (en) 1988-04-18 1988-04-18 CENTRIFUGAL GRINDING MACHINE
DE3812908 1988-04-18

Publications (3)

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EP0338359A2 EP0338359A2 (en) 1989-10-25
EP0338359A3 EP0338359A3 (en) 1989-12-06
EP0338359B1 true EP0338359B1 (en) 1992-03-25

Family

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EP89106259A Expired - Lifetime EP0338359B1 (en) 1988-04-18 1989-04-08 Centrifugal polishing machine

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US (1) US4958776A (en)
EP (1) EP0338359B1 (en)
DE (2) DE3812908A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH075974Y2 (en) * 1990-04-06 1995-02-15 株式会社チップトン Swirl barrel machine
US5119597A (en) * 1990-08-28 1992-06-09 The Grav-I-Flo Corporation Centrifugal disk finishing apparatus
US5279074A (en) * 1990-08-28 1994-01-18 The Grav-I-Flo Corporation Centrifugal disk finishing apparatus utilizing dry media
AT178U1 (en) * 1991-09-24 1995-04-25 Johann Tauss Ges M B H Johann MACHINE FOR GRINDING
DE4214060A1 (en) * 1992-04-29 1993-11-04 Peter Dannemann Device for deflashing, grinding and polishing bulk material - has two part housing with clearance between formed as plate with inner opening
US5295330A (en) * 1992-09-08 1994-03-22 Hoffman Steve E Fluid thrust bearing centrifugal disk finisher
DE4404122C1 (en) * 1994-02-09 1995-07-20 Dreher Manfrid Kg Dr Ing Centrifugal vibratory grinding machine
JP3062800B2 (en) * 1996-02-26 2000-07-12 株式会社チップトン Eddy barrel processing machine
DE29702859U1 (en) * 1997-02-19 1998-03-19 Gegenheimer, Helmut, 75210 Keltern Centrifugal vibratory grinding machine
US6261154B1 (en) 1998-08-25 2001-07-17 Mceneny Jeffrey William Method and apparatus for media finishing
US5988540A (en) * 1998-08-26 1999-11-23 Pugh; Terrance Comminuting and distributing device for recycling yard waste
DE20009539U1 (en) * 2000-05-26 2001-08-02 OTEC Präzisionsfinish GmbH, 75334 Straubenhardt Device for grinding material to be ground
US6821191B2 (en) * 2002-10-24 2004-11-23 Fantom Company, Ltd. Ball finishing process
DE10253833B3 (en) * 2002-11-18 2004-05-06 Otec Präzisionsfinish GmbH Device for grinding workpieces
US9017142B2 (en) * 2013-02-14 2015-04-28 Ericus Andreas van Kleef Mass finishing apparatus and method
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
DE112020001657T5 (en) * 2019-03-29 2021-12-16 Sintokogio, Ltd. Barrel polishing device
US12053852B2 (en) * 2020-02-28 2024-08-06 Sintokogio, Ltd. Barrel polishing apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177608A (en) * 1978-01-16 1979-12-11 Roto-Finish Company, Inc. Finishing apparatus embodying improved seal and method
JPS5859762A (en) * 1981-10-06 1983-04-08 Toyota Motor Corp Fluid barrel apparatus equipped with medium dregs removing device
DE3228658C2 (en) * 1982-07-31 1984-11-08 Carl Kurt Walther Gmbh & Co Kg, 5600 Wuppertal Centrifugal vibratory grinding machine
CH664905A5 (en) * 1983-09-09 1988-04-15 Wyss & Probst Engineering Mixer and pelletiser - with intermediate bottom movable from mixing to discharging position
DE3422478A1 (en) * 1984-06-16 1985-12-19 Carl Kurt Walther Gmbh & Co Kg, 5600 Wuppertal CENTRIFUGAL GRINDING MACHINE
DE3604662A1 (en) * 1986-02-14 1987-08-20 Spaleck Gmbh Max CENTRIFUGAL MACHINE

Also Published As

Publication number Publication date
DE58901009D1 (en) 1992-04-30
EP0338359A2 (en) 1989-10-25
EP0338359A3 (en) 1989-12-06
DE3812908A1 (en) 1989-10-26
US4958776A (en) 1990-09-25

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