EP0692340A1 - Apparatus for machining workpieces under application of the centrifugal force - Google Patents

Apparatus for machining workpieces under application of the centrifugal force Download PDF

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Publication number
EP0692340A1
EP0692340A1 EP94810370A EP94810370A EP0692340A1 EP 0692340 A1 EP0692340 A1 EP 0692340A1 EP 94810370 A EP94810370 A EP 94810370A EP 94810370 A EP94810370 A EP 94810370A EP 0692340 A1 EP0692340 A1 EP 0692340A1
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EP
European Patent Office
Prior art keywords
screw
pressure compensation
work container
container according
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94810370A
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German (de)
French (fr)
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EP0692340B1 (en
Inventor
Simon Jacot
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POLYSERVICE AG
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POLYSERVICE AG
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Publication date
Application filed by POLYSERVICE AG filed Critical POLYSERVICE AG
Priority to DE59407139T priority Critical patent/DE59407139D1/en
Priority to EP19940810370 priority patent/EP0692340B1/en
Publication of EP0692340A1 publication Critical patent/EP0692340A1/en
Application granted granted Critical
Publication of EP0692340B1 publication Critical patent/EP0692340B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines 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
    • B24B31/02—Machines 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 rotary barrels
    • B24B31/033—Machines 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 rotary barrels having several rotating or tumbling drums with parallel axes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines 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
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00

Definitions

  • the present invention relates to a device for machining workpieces under the influence of centrifugal force.
  • machining is primarily understood to mean deburring, grinding and polishing.
  • Such devices are commercially available, or also described in DE-A-38 43 326.
  • the work containers of such devices that receive the workpieces are tightly closed during the machining phase.
  • Such containers are primarily intended to be used for devices capable of imparting planetary rotation to the containers, generally two or more containers arranged axially parallel are arranged on a rotating plate which gives the containers a rotating movement about their axis. This planetary rotary movement creates a relatively high grinding force, as a result of which the bulk goods and the working container are considerably heated by friction and this creates high working pressures in the working container.
  • the working container 1 has a closed bottom 2 and a lid 3, in the present example End screw cap, on and is designed in the present example for a content of one liter.
  • the inside of the working container is provided with a low-abrasion protective layer 4, preferably made of plastic, which can be replaced and thus allows the working container to be reused.
  • the end screw cap 3 can be screwed onto the external thread 6 of the container neck 7 via an internal thread 5, but can also be provided with a quick-release fastener.
  • an elastic pressure compensation membrane 9 is arranged on a shoulder 8, which has pores 10, the diameter of which, even when the membrane is expanded, is smaller than the diameter of the smallest workpieces and the carrier material.
  • the elastic pressure equalization membrane is preferably made of rubber, but other materials with similar deformation properties can also be used.
  • a liquid collecting tray 11 is placed inside out, in such a way that the bottom 12 of the tray is located near the inside 13 of the end screw cap at the top.
  • a vent screw 14 is installed through the screw cap 3 and the liquid collecting bowl 11, which axially has an inner bore 15 which opens into a plurality of vent holes 16 arranged horizontally in the screw head. This arrangement prevents liquid from escaping when the excess pressure is released.
  • the working container works as follows: after filling the container with the workpieces and the solid carrier material and additives with liquid for processing the workpieces, the working container is set into a planetary rotary movement, which This means that it rotates around a center point on a plate and self-rotates around its central axis 17. This creates heat through the friction of the materials, which leads to an increase in pressure in the container. As a result of this pressure increase, the membrane 9 is deformed in the interior of the liquid collecting tray, as a result of which the pores 10, which are already present in the membrane material or have additionally been mechanically attached, open and the excess pressure can escape via the vent screw 14.
  • the working pressure in the working container can be influenced by the appropriate choice of the pore size in the pressure compensation membrane, the pore size always having to be smaller than the workpieces and the carrier material.
  • the compressed air escaping through the pressure compensation membrane can release polishing liquid through condensation and direct separation, which is pressed against the outer wall of the liquid collecting bowl by centrifugal force. This prevents the liquid from escaping through the bleed screw.
  • the pressure equalization can achieve various advantages such as better utilization of the work volume, immediate opening of the work container after a work process and no excessive heating of the workpieces to be machined.

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

Abstract

The device comprises an operating container (1) which has a closed base (2) and a removable lid (3). The container has pressure equalisers in the form of an elastic membrane (9) and a ventilator screw (14) set in the top of the lid (13). A fluid collector-dish (11) is positioned between the pressure equalisers and the inside of the lid. The dish is open towards the pressure equalisers and has a base (12) which comprises a hole for the ventilator screw. The ventilator screw has an axial inner hole (15) which opens into horizontal ventilator holes (16) in the screw head. <IMAGE>

Description

Die vorliegende Erfindung bezieht sich auf eine Vorrichtung für die Bearbeitung von Werkstücken unter Einwirkung der Fliehkraft gemäss Oberbegriff von Patentanspruch 1. Unter Bearbeitung versteht man bei solchen Vorrichtungen vorwiegend Entgraten, Schleifen und Polieren. Solche Vorrichtungen sind im Handel erhältlich, oder auch in der DE-A-38 43 326 beschrieben. Die Arbeitsbehälter solcher Vorrichtungen, die die Werkstücke aufnehmen, sind während der Bearbeitungsphase fest verschlossen. Solche Behälter sind in erster Linie gedacht, für Vorrichtungen benutzt zu werden, die den Behältern eine Planetendrehbewegung übertragen können, wobei im allgemeinen zwei oder mehrere achsparallel angeordnete Behälter auf einem sich drehenden Teller angeordnet sind, der den Behältern eine um ihre Achse rotierende Bewegung erteilt. Bei dieser Planeten-Drehbewegung entsteht eine relativ hohe Schleifkraft, wodurch das Schüttgut und der Arbeitsbehälter durch Reibung erheblich erwärmt werden und dadurch hohe Arbeitsdrücke im Arbeitsbehälter entstehen.The present invention relates to a device for machining workpieces under the influence of centrifugal force. According to the preamble of claim 1, machining is primarily understood to mean deburring, grinding and polishing. Such devices are commercially available, or also described in DE-A-38 43 326. The work containers of such devices that receive the workpieces are tightly closed during the machining phase. Such containers are primarily intended to be used for devices capable of imparting planetary rotation to the containers, generally two or more containers arranged axially parallel are arranged on a rotating plate which gives the containers a rotating movement about their axis. This planetary rotary movement creates a relatively high grinding force, as a result of which the bulk goods and the working container are considerably heated by friction and this creates high working pressures in the working container.

Es ist davon ausgehend Aufgabe der vorliegenden Erfindung den Wirkungsgrad solcher Vorrichtungen durch Verminderung des Arbeitsdruckes im Arbeitsbehälter zu erhöhen. Die Aufgabe wird mit der Vorrichtung gemäss Patentanspruch 1 gelöst.It is based on the object of the present invention to increase the efficiency of such devices by reducing the working pressure in the working container. The object is achieved with the device according to claim 1.

Die Erfindung wird im folgenden anhand einer Zeichnung eines Ausführungsbeispiels näher erläutert, wobei die einzige Figur im Schnitt einen Arbeitsbehälter einer erfindungsgemässen Vorrichtung darstellt.The invention is explained in more detail below with reference to a drawing of an exemplary embodiment, the single figure in section representing a working container of a device according to the invention.

Der Arbeitsbehälter 1 weist einen geschlossenen Boden 2 und einen Deckel 3, in vorliegendem Beispiel ein Abschlussschraubdeckel, auf und ist in vorliegendem Beispiel für einen Inhalt von einem Liter ausgelegt. Innen ist der Arbeitsbehälter mit einer abreibarmen Schutzschicht 4, vorzugsweise aus Kunststoff, versehen, die ersetzt werden kann und somit eine Wiederverwendung des Arbeitsbehälters erlaubt. Der Abschlussschraubdeckel 3 ist über ein Innengewinde 5 auf das Aussengewinde 6 des Behälterhalses 7 verschraubbar, kann aber auch mit einem Schnellverschluss versehen werden.The working container 1 has a closed bottom 2 and a lid 3, in the present example End screw cap, on and is designed in the present example for a content of one liter. The inside of the working container is provided with a low-abrasion protective layer 4, preferably made of plastic, which can be replaced and thus allows the working container to be reused. The end screw cap 3 can be screwed onto the external thread 6 of the container neck 7 via an internal thread 5, but can also be provided with a quick-release fastener.

Am Uebergang zwischen dem Behälterinnenraum, der Behälterwand und dem Behälterhals ist, auf einem Absatz 8, eine elastische Druckausgleichsmembran 9 angeordnet, die Poren 10 aufweist, deren Durchmesser auch bei Ausdehnung der Membran kleiner ist als der Durchmesser der kleinsten Werkstücke und des Trägermaterials. Die elastische Druckausgleichsmembran wird vorzugsweise aus Kautschuk hergestellt, doch können auch andere Materialien mit ähnlichen Verformungseigenschaften verwendet werden.At the transition between the container interior, the container wall and the container neck, an elastic pressure compensation membrane 9 is arranged on a shoulder 8, which has pores 10, the diameter of which, even when the membrane is expanded, is smaller than the diameter of the smallest workpieces and the carrier material. The elastic pressure equalization membrane is preferably made of rubber, but other materials with similar deformation properties can also be used.

Oberhalb der Membran 9 und innerhalb des Behälterhalses ist eine Flüssigkeitsauffangschale 11 umgestülpt angeordnet, derart, dass der Boden 12 der Schale sich oben nahe der Innenseite 13 des Abschlussschraubdeckels befindet. Durch den Abschlussschraubdeckel 3 und die Flüssigkeitsauffang-Schale 11 ist eine Entlüftungsschraube 14 eingebaut, die axial eine Innenbohrung 15 aufweist, die in mehrere im Schraubenkopf horizontal angeordnete Entlüftungsbohrungen 16 einmündet. Durch diese Anordnung wird verhindert, dass beim Abbau des Ueberdruckes Flüssigkeit entweichen kann.Above the membrane 9 and inside the container neck, a liquid collecting tray 11 is placed inside out, in such a way that the bottom 12 of the tray is located near the inside 13 of the end screw cap at the top. A vent screw 14 is installed through the screw cap 3 and the liquid collecting bowl 11, which axially has an inner bore 15 which opens into a plurality of vent holes 16 arranged horizontally in the screw head. This arrangement prevents liquid from escaping when the excess pressure is released.

Die Arbeitsweise des Arbeitsbehälters ist die folgende: nach dem Auffüllen des Behälters mit den Werkstücken und dem festen Trägermaterial sowie Zusatzmittel mit Flüssigkeit zur Bearbeitung der Werkstücke wird der Arbeitsbehälter in eine Planetendrehbewegung versetzt, das heisst, er vollführt eine Drehung um einen Mittelpunkt auf einem Teller sowie eine Eigenrotation um seine Mittelachse 17. Dadurch wird durch die Reibung der Materialien eine Wärme erzeugt, die zu einem Druckanstieg im Behälter führt. Durch diesen Druckanstieg wird die Membran 9 im Inneren der Flüssigkeitsauffangschale verformt, wodurch sich die Poren 10, die bereits im Membranmaterial vorhanden sind oder zusätzlich mechanisch angebracht worden sind, öffnen, und der Ueberdruck über die Entlüftungsschraube 14 entweichen kann.The working container works as follows: after filling the container with the workpieces and the solid carrier material and additives with liquid for processing the workpieces, the working container is set into a planetary rotary movement, which This means that it rotates around a center point on a plate and self-rotates around its central axis 17. This creates heat through the friction of the materials, which leads to an increase in pressure in the container. As a result of this pressure increase, the membrane 9 is deformed in the interior of the liquid collecting tray, as a result of which the pores 10, which are already present in the membrane material or have additionally been mechanically attached, open and the excess pressure can escape via the vent screw 14.

Durch die entsprechende Wahl der Porengrösse in der Druckausgleichsmembran kann der Arbeitsdruck im Arbeitsbehälter beeinflusst werden, wobei die Porengrösse stets kleiner als die Werkstücke und das Trägermaterial sein muss. Die durch die Druckausgleichsmembran entwichene Druckluft kann durch Kondensierung und direkte Ausscheidung Polierflüssigkeit abgeben, die durch Zentrifugalkraft an die Aussenwand der Flüssigkeitsauffangschale gepresst wird. Dadurch wird verhindert, dass die Flüssigkeit durch die Entlüftungsschraube entweichen kann.The working pressure in the working container can be influenced by the appropriate choice of the pore size in the pressure compensation membrane, the pore size always having to be smaller than the workpieces and the carrier material. The compressed air escaping through the pressure compensation membrane can release polishing liquid through condensation and direct separation, which is pressed against the outer wall of the liquid collecting bowl by centrifugal force. This prevents the liquid from escaping through the bleed screw.

Durch den Druckausgleich können verschiedene Vorteile wie bessere Ausnutzung des Arbeitsvolumen, sofortiges Oeffnen des Arbeitsbehälters nach einem Arbeitsprozess und keine übermässige Erwärmung der zu bearbeitenden Werkstücke erreicht werden.The pressure equalization can achieve various advantages such as better utilization of the work volume, immediate opening of the work container after a work process and no excessive heating of the workpieces to be machined.

Claims (5)

Vorrichtung für die Bearbeitung von Werkstücken unter Einwirkung der Fliehkraft, mit mindestens einem rotierbaren Arbeitsbehälter, dadurch gekennzeichnet, dass der einen geschlossenen Boden (2) und einen abnehmbaren Deckel (3) aufweisende Arbeitsbehälter (1) mit Drucksausgleichs-Mitteln (9, 14) ausgestattet ist.Device for machining workpieces under the influence of centrifugal force, with at least one rotatable work container, characterized in that the work container (1), which has a closed base (2) and a removable cover (3), is equipped with pressure compensation means (9, 14) is. Arbeitsbehälter nach Anspruch 1, dadurch gekennzeichnet, dass die Druckausgleichsmittel eine mit Poren (10) versehene, elastische Druckausgleichsmembram (9) und eine in der Deckeloberseite (13) angeordnete Entlüftungsschraube (14) enthalten.Work container according to claim 1, characterized in that the pressure compensation means contain an elastic pressure compensation membrane (9) provided with pores (10) and a ventilation screw (14) arranged in the top side of the cover (13). Arbeitsbehälter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen dem Druckausgleichsmittel und der Innenseite (13) des Deckels (3) eine Flüssigkeits-Auffangschale (11) angeordnet ist, die zum Druckausgleichs-Mittel hin offen ist und deren Boden (12) eine Bohrung zur Aufnahme der Entlüftungsschraube (14) aufweist.Work container according to claim 1 or 2, characterized in that between the pressure compensation means and the inside (13) of the lid (3) a liquid collecting tray (11) is arranged, which is open to the pressure compensation means and the bottom (12) of which Has hole for receiving the vent screw (14). Arbeitsbehälter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Entlüftungsschraube (14) eine axiale Innenbohrung (15) aufweist, die in im Schraubenkopf angeordnete, horizontale Entlüftungsbohrungen (16) mündet.Working container according to one of claims 1 to 3, characterized in that the ventilation screw (14) has an axial inner bore (15) which opens into horizontal ventilation bores (16) arranged in the screw head. Arbeitsbehälter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sein Inneres mit einer abreibarmen Schutzschicht (4) versehen ist.Work container according to one of claims 1 to 4, characterized in that its interior is provided with a low-abrasion protective layer (4).
EP19940810370 1994-06-23 1994-06-23 Apparatus for machining workpieces under application of the centrifugal force Expired - Lifetime EP0692340B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59407139T DE59407139D1 (en) 1994-06-23 1994-06-23 Device for machining workpieces under the influence of centrifugal force
EP19940810370 EP0692340B1 (en) 1994-06-23 1994-06-23 Apparatus for machining workpieces under application of the centrifugal force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19940810370 EP0692340B1 (en) 1994-06-23 1994-06-23 Apparatus for machining workpieces under application of the centrifugal force

Publications (2)

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EP0692340A1 true EP0692340A1 (en) 1996-01-17
EP0692340B1 EP0692340B1 (en) 1998-10-21

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EP19940810370 Expired - Lifetime EP0692340B1 (en) 1994-06-23 1994-06-23 Apparatus for machining workpieces under application of the centrifugal force

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DE (1) DE59407139D1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT210782B (en) * 1958-02-14 1960-08-25 Hans Oetiker Safety device for the pressure-relieved lifting of a cover especially intended for roller barrels
DE2647468B1 (en) * 1976-10-21 1978-04-06 Walther Carl Kurt Gmbh Lid for vibratory grinding work container
DE8003140U1 (en) * 1980-02-07 1980-07-10 Dr. Ing. Manfrid Dreher Gmbh & Co Kg, 7543 Engelsbrand RECEIVING DEVICE FOR RECEIVING A CONTAINER ON THE ROTOR OF A CENTRIFUGAL DRUM MACHINE
DE3843326A1 (en) * 1988-12-30 1990-06-28 Evgenij Sergeevic Pervusin Apparatus for the working of workpieces under the action of centrifugal force

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT210782B (en) * 1958-02-14 1960-08-25 Hans Oetiker Safety device for the pressure-relieved lifting of a cover especially intended for roller barrels
DE2647468B1 (en) * 1976-10-21 1978-04-06 Walther Carl Kurt Gmbh Lid for vibratory grinding work container
DE8003140U1 (en) * 1980-02-07 1980-07-10 Dr. Ing. Manfrid Dreher Gmbh & Co Kg, 7543 Engelsbrand RECEIVING DEVICE FOR RECEIVING A CONTAINER ON THE ROTOR OF A CENTRIFUGAL DRUM MACHINE
DE3843326A1 (en) * 1988-12-30 1990-06-28 Evgenij Sergeevic Pervusin Apparatus for the working of workpieces under the action of centrifugal force

Also Published As

Publication number Publication date
DE59407139D1 (en) 1998-11-26
EP0692340B1 (en) 1998-10-21

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