EP2228173A2 - Polishing or grinding device with a pneumatic drive - Google Patents

Polishing or grinding device with a pneumatic drive Download PDF

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Publication number
EP2228173A2
EP2228173A2 EP10002148A EP10002148A EP2228173A2 EP 2228173 A2 EP2228173 A2 EP 2228173A2 EP 10002148 A EP10002148 A EP 10002148A EP 10002148 A EP10002148 A EP 10002148A EP 2228173 A2 EP2228173 A2 EP 2228173A2
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EP
European Patent Office
Prior art keywords
polishing
grinding
polishing pad
compressed air
drive
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Granted
Application number
EP10002148A
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German (de)
French (fr)
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EP2228173B1 (en
EP2228173A3 (en
Inventor
Boris Dipl.-Ing. Kochanski
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Individual
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Individual
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Priority to DE202010013895U priority Critical patent/DE202010013895U1/en
Publication of EP2228173A2 publication Critical patent/EP2228173A2/en
Publication of EP2228173A3 publication Critical patent/EP2228173A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/026—Fluid driven
    • 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
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions

Definitions

  • the invention relates to a polishing or grinding device for polishing or grinding painted surfaces, with a centrically or eccentrically rotatable polishing pad or grinding member, which can be brought with its lower surface in abutment against the surface to be polished or ground, and a pneumatic drive, by means of which the polishing pad or the grinding member is rotatable.
  • a corresponding polishing device is in the EP 0 691 181 A1 shown.
  • a pneumatic drive is already provided.
  • the compressed air flow supplied to the polishing device is split upstream of the pneumatic drive.
  • a part of this compressed air flow drives the pneumatic drive of the polishing apparatus, while the other part of the compressed air flow is supplied as cooling air to the processing surface or contact surface between a polishing pad of the polishing apparatus and the painted surface to be treated.
  • This known polishing device has a comparatively complicated technical-constructive structure and beyond a comparatively high compressed air and energy consumption.
  • the present invention seeks to provide a polishing or grinding device available, on the one hand has a comparatively simple technical and constructive structure and by means of the other hand during polishing or grinding significantly higher efficiencies achievable are.
  • a Druck Kunststoffleitvorraum is arranged, by means of which the drive pressure air of the pneumatic drive from the output side thereof to the polishing pad or the grinding member is conductive, and that the polishing pad or the grinding member is formed in the region of its lower surface with air channels, through which the driving compressed air can be derived from a central region of the lower surface of the polishing pad or the grinding member to the peripheral edge of the polishing pad or the grinding member.
  • the compressed air drive acting on the drive compressed air is used after its associated with a considerable cooling relaxation in the compressed air drive once again as cooling air at the interface between the polishing pad or the grinding member and the surface to be treated.
  • the air flowing therefrom can optimally function as cooling air.
  • the lower surface of the polishing pad or of the grinding member can be designed undisturbed and over the entire surface, with the resulting advantages for the polishing or grinding process.
  • the drive compressed air is supplied to the compressed air drive by a handle of the polishing or grinding device.
  • a throttle valve is provided in or on the handle, the handle is arranged on the handle and by means of which the mass flow of the driving compressed air is controllable.
  • this compressed air drive is designed as a constant pressure turbine with a turbine rotor and a reversing chamber such that the driving compressed air Paddle wheels of the turbine rotor happens at least twice.
  • the constant pressure turbine has a gap through which the drive pressure air after passing twice the impellers of the turbine rotor to between the constant pressure turbine and the polishing pad or the grinding member arranged Druck Kunststoffleitvorraum is derivable.
  • the Druck Kunststoffleitvoriques is formed as a hollow channel in a compressed air drive with the polishing pad connecting drive shaft, the polishing pad or the grinding member is fixed by means of a holding plate at the end remote from the compressed air drive, so that the driving compressed air after it has flowed through the compressed air drive, relaxed and thus cooled , can be passed to the polishing pad or the grinding member with little technical-constructive means.
  • the cooling of the compressed air drive leaving drive compressed air can be increased if the hollow channel is designed as a diffuser.
  • a speed-reducing gear is arranged between the compressed-air drive on the one hand and the output shaft on the other hand.
  • Stalling the pneumatic drive of the polishing or grinding device is reliably avoided in each case when the polishing pad or the grinding member is designed by means of the formed therein and a blade grid forming air channels as a radial flow machine, and the contact pressure of the polishing or grinding device on the processing surface does not exceed the value allowed for professional processing.
  • the blade grid formed by the air ducts may be designed as a turbine or alternatively as a compressor.
  • the pressure level can be influenced immediately downstream of the compressed air drive.
  • the practical applicability of the polishing apparatus according to the invention is further increased if the polishing pad is formed from a dimensionally stable up to a predetermined limit pressure and elastically deformable when exceeding this limit pressure material.
  • polishing device 1 serves to polish painted surfaces, eg of vehicle body parts.
  • the polishing apparatus 1 has a polishing pad 2, which is circular in the illustrated embodiment.
  • the polishing pad 2 is brought with its lower surface 3 in abutment against the surface to be polished and set in a rotational movement, so that the lower surface 3 rotates on the surface to be polished with a comparatively high rotational speed.
  • the drive power is transmitted by a drive shaft 5 to the polishing pad 2.
  • a retaining plate 6 is rotatably attached in a suitable manner on the compressed air drive remote end of the drive shaft 5, on which in turn the polishing pad 2 is fixed.
  • To the polishing apparatus 1 further includes a handle 7 through which drive compressed air 8 is guided to the compressed air drive 4.
  • Throttle valve provided, which is adjustable by means of a handle 7 hinged handle 9.
  • the drive compressed air 8 is guided by a provided in a housing 10 of the polishing device 1 and the compressed air drive 4 compressed air channel 11 to the pneumatic drive 4, which is formed in the illustrated embodiment as a constant pressure turbine 4.
  • the drive pressure air 8 is first guided over paddle wheels 12 of a turbine rotor 13 of the DC turbine 4, then enters a arranged in the housing of the pneumatic drive 4 and the constant pressure turbine 4 reversing chamber 14 and then, as best of FIG. 3 emerges again guided over the paddle wheels 12 of the turbine rotor 13. Thereafter, the driving compressed air 8 enters a space formed in the constant pressure turbine gap 15 and is introduced from there into a hollow channel 16 which is formed in the drive shaft 5, which produces the drive connection between the DC turbine 4 on the one hand and the polishing pad 2 on the other. Between the DC turbine 4 and provided with the hollow channel 16 drive shaft 5, a speed-reducing transmission 17 is arranged.
  • the equal pressure turbine side gap 15 with a centrally formed in the polishing pad 2 cavity 18 connecting hollow channel 16 of the drive shaft 5 forms with the gap 15 and the cavity 18 a Druck Kunststoffleitvortechnisch 15, 16, 18, by means of the compressed air drive 8, after the compressed air drive or the Equal pressure turbine 4 of the polishing device has driven, is guided to the polishing pad 2.
  • the polishing pad 2 is formed with from the cavity 18 to the peripheral edge 19 of the polishing pad 2 extending air channels 20.
  • the air channels 20 form a blade grid in the region of the polishing pad arranged on the lower surface 3 or near the lower surface 3, with the result that the polishing pad 2 operates like a radial flow machine.
  • the upstream of the formed in the drive shaft 5 hollow channel 16 serving as a drive medium for the constant pressure turbine 4 of the polishing device 1 driving compressed air, which is relaxed during operation of the constant pressure turbine 4 and thus cooler, is used in the region of the polishing pad 2 of the polishing device 1 as a cooling medium by means of which at the relative movement between the polishing pad 2 on the one hand and the surface to be polished on the other hand heat can be selectively removed and controlled from the area of the polishing pad 2.
  • the driving compressed air 8 which cools down strongly in the region of the constant pressure turbine 4 is thus used in the context of secondary use for the removal of the heat energy generated during the polishing process.
  • the driving compressed air 8 as indicated by the arrow in FIG. 1 represented, led by the handle 7 to the constant pressure turbine 4.
  • the throttle valve provided on or in the handle 7, the mass flow of the driving compressed air 8 can be controlled.
  • the driving compressed air 8 is guided during passage through the constant pressure turbine 4 by means of the reversing chamber 14 so that it passes through the paddle wheels 12 of the turbine rotor 13 twice. After passing twice the paddle wheels 12, the drive pressure air 8 is supplied through the intermediate space 15 in the constant pressure turbine 4 to the formed in the drive shaft 5 hollow channel 16. When passing through the constant pressure turbine 4, the drive pressure air 8 has cooled strongly.
  • the unobstructed outflow of the driving compressed air 8 is ensured in the region of the polishing pad 2 in that the polishing pad 2 - as already mentioned above - is designed by means of the air channels 20 as a radial flow machine.

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

Abstract

The device (1) has compressed air guiding devices (15, 16, 18) arranged between a compression air drive (4) and a polishing pad (2) and/or a sharpening unit. The guiding devices guide drive compression air (8) of the compression air drive from an outlet side of the guiding devices to the polishing pad and/or to the sharpening unit. The drive compression air of the compression air drive is conveyed from a middle area of a lower surface (3) of the polishing pad and/or the sharpening unit to a circumferential edge (19) of the polishing pad and/or the sharpening unit by air ducts (20).

Description

Die Erfindung bezieht sich auf eine Polier- oder Schleifvorrichtung zum Polieren oder Schleifen lackierter Oberflächen, mit einem zentrisch oder exzentrisch rotierbaren Polierkissen bzw. Schleifglied, das mit seiner Unterfläche in Anlage an die zu polierende bzw. zu schleifende Oberfläche bringbar ist, und einem Druckluftantrieb, mittels dem das Polierkissen bzw. das Schleifglied rotierbar ist.The invention relates to a polishing or grinding device for polishing or grinding painted surfaces, with a centrically or eccentrically rotatable polishing pad or grinding member, which can be brought with its lower surface in abutment against the surface to be polished or ground, and a pneumatic drive, by means of which the polishing pad or the grinding member is rotatable.

Um den Polier- oder Schleifvorgang zu optimieren und insbesondere, um die dabei entstehende Reibungs- bzw. Abwärme zu beseitigen, ist es bekannt, Kühlluft einzusetzen. Eine entsprechende Poliervorrichtung ist in der EP 0 691 181 A1 gezeigt. Bei dieser bekannten Poliervorrichtung ist bereits ein Druckluftantrieb vorgesehen. Der der Poliervorrichtung zugeführte Druckluftstrom wird stromauf des Druckluftantriebs aufgeteilt. Ein Teil dieses Druckluftstroms treibt den Druckluftantrieb der Poliervorrichtung an, während der andere Teil des Druckluftstroms als Kühlluft der Bearbeitungsfläche bzw. der Kontaktfläche zwischen einer Polierscheibe der Poliervorrichtung und der zu behandelnden lackierten Oberfläche zugeführt wird. Diese bekannte Poliervorrichtung hat einen vergleichsweise komplizierten technisch-konstruktiven Aufbau und darüber hinaus einen vergleichsweise hohen Druckluft- und Energieverbrauch.In order to optimize the polishing or grinding process and in particular to eliminate the resulting frictional or waste heat, it is known to use cooling air. A corresponding polishing device is in the EP 0 691 181 A1 shown. In this known polishing device, a pneumatic drive is already provided. The compressed air flow supplied to the polishing device is split upstream of the pneumatic drive. A part of this compressed air flow drives the pneumatic drive of the polishing apparatus, while the other part of the compressed air flow is supplied as cooling air to the processing surface or contact surface between a polishing pad of the polishing apparatus and the painted surface to be treated. This known polishing device has a comparatively complicated technical-constructive structure and beyond a comparatively high compressed air and energy consumption.

Ausgehend von dem vorstehend geschilderten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Polier- oder Schleifvorrichtung zur Verfügung zu stellen, die einerseits über einen vergleichsweise einfachen technisch-konstruktiven Aufbau verfügt und mittels der andererseits beim Polier- bzw. Schleifvorgang erheblich höhere Wirkungsgrade erzielbar sind.Based on the above-described prior art, the present invention seeks to provide a polishing or grinding device available, on the one hand has a comparatively simple technical and constructive structure and by means of the other hand during polishing or grinding significantly higher efficiencies achievable are.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass zwischen dem Druckluftantrieb und dem Polierkissen bzw. dem Schleifglied eine Druckluftleitvorrichtung angeordnet ist, mittels der die Antriebsdruckluft des Druckluftantriebs von der Ausgangsseite desselben zum Polierkissen bzw. zum Schleifglied leitbar ist, und dass das Polierkissen bzw. das Schleifglied im Bereich seiner Unterfläche mit Luftkanälen ausgebildet ist, durch die hindurch die Antriebsdruckluft von einem mittleren Bereich der Unterfläche des Polierkissens bzw. des Schleifglieds zum Umfangsrand des Polierkissens bzw. des Schleifglieds ableitbar ist. Erfindungsgemäß wird die den Druckluftantrieb beaufschlagende Antriebdruckluft nach ihrer mit einer erheblichen Abkühlung einhergehenden Entspannung im Druckluftantrieb noch einmal als Kühlluft an der Berührungsfläche zwischen dem Polierkissen bzw. dem Schleifglied und der zu behandelnden Oberfläche genutzt. Mittels der Kühlluft wird gezielt an der aktuellen Bearbeitungsfläche ein optimaler Abtransport der dort entstehenden Wärmeenergie gewährleistet, wobei darüber hinaus ein beschleunigter Abtransport der Lösungsmittel aus dem frischen Lack gesichert werden kann. Die gesamte der Polier- bzw. der Schleifvorrichtung zugeführte Druckluft wird sowohl als Antriebsdruckluft als auch als Kühlluft eingesetzt. Der Wirkungsgrad der erfindungsgemäßen Polier- oder Schleifvorrichtung ist im Vergleich zu aus dem Stand der Technik bekannten derartigen Vorrichtungen erheblich erhöht.This object is achieved in that between the pneumatic drive and the polishing pad or the grinding member a Druckluftleitvorrichtung is arranged, by means of which the drive pressure air of the pneumatic drive from the output side thereof to the polishing pad or the grinding member is conductive, and that the polishing pad or the grinding member is formed in the region of its lower surface with air channels, through which the driving compressed air can be derived from a central region of the lower surface of the polishing pad or the grinding member to the peripheral edge of the polishing pad or the grinding member. According to the invention, the compressed air drive acting on the drive compressed air is used after its associated with a considerable cooling relaxation in the compressed air drive once again as cooling air at the interface between the polishing pad or the grinding member and the surface to be treated. By means of the cooling air, optimum removal of the heat energy arising therefrom is ensured in a targeted manner on the current processing surface, wherein, moreover, accelerated removal of the solvents from the fresh paint can be ensured. The entire of the polishing or the grinding device supplied compressed air is used both as driving compressed air and as cooling air. The efficiency of the polishing or grinding device according to the invention is compared to off The prior art known devices significantly increased.

Wenn die im Bereich der Unterfläche des Polierkissens bzw. des Schleifglieds ausgebildeten Luftkanäle an der Unterfläche des Polierkissens bzw. des Schleifglieds offen sind, kann die dort strömende Luft in optimaler Weise ihre Wirkung als Kühlluft entfalten.When the air passages formed in the lower surface of the polishing pad and the grinding member are open at the lower surface of the polishing pad and the grinding member, the air flowing therefrom can optimally function as cooling air.

Wenn die im Bereich der Unterfläche des Polierkissens bzw. des Schleifglieds ausgebildeten Luftkanäle an der Unterfläche des Polierkissens bzw. des Schleifglieds geschlossen sind, kann die Unterfläche des Polierkissens bzw. des Schleifglieds ungestört und vollflächig ausgestaltet sein, mit den daraus resultierenden Vorteilen für den Polier- oder Schleifvorgang.If the air ducts formed in the area of the lower surface of the polishing pad or the grinding member are closed on the lower surface of the polishing pad or the grinding member, the lower surface of the polishing pad or of the grinding member can be designed undisturbed and over the entire surface, with the resulting advantages for the polishing or grinding process.

Gemäß einer vorteilhaften Ausführungsform der erfindungsgemäßen Polier- oder Schleifvorrichtung wird die Antriebsdruckluft dem Druckluftantrieb durch einen Handgriff der Polier- oder Schleifvorrichtung zugeführt.According to an advantageous embodiment of the polishing or grinding device according to the invention, the drive compressed air is supplied to the compressed air drive by a handle of the polishing or grinding device.

Zweckmäßigerweise ist im bzw. am Handgriff ein Drosselventil vorgesehen, dessen Handhabe am Handgriff angeordnet ist und mittels dem der Massenstrom der Antriebsdruckluft steuerbar ist.Conveniently, a throttle valve is provided in or on the handle, the handle is arranged on the handle and by means of which the mass flow of the driving compressed air is controllable.

Um den Druckluftantrieb als solchen bereits mit einem möglichst hohen Wirkungsgrad auszugestalten, ist gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung dieser Druckluftantrieb als Gleichdruckturbine mit einem Turbinenrotor und einer Umkehrkammer derart ausgebildet, dass die Antriebsdruckluft Schaufelräder des Turbinenrotors zumindest zweimal passiert.To design the compressed air drive as such already with the highest possible efficiency, according to a further advantageous embodiment of the invention, this compressed air drive is designed as a constant pressure turbine with a turbine rotor and a reversing chamber such that the driving compressed air Paddle wheels of the turbine rotor happens at least twice.

Um die Nutzung der die Gleichdruckturbine beaufschlagenden Antriebsdruckluft als Kühlluft in konstruktiv-technisch wenig aufwendiger Weise möglich zu machen, wird vorgeschlagen, dass die Gleichdruckturbine einen Zwischenraum aufweist, durch den hindurch die Antriebsdruckluft nach zweimaligem Passieren der Schaufelräder des Turbinenrotors zur zwischen der Gleichdruckturbine und dem Polierkissen bzw. dem Schleifglied angeordneten Druckluftleitvorrichtung ableitbar ist.In order to make the use of the impulse turbine pressurized drive compressed air as cooling air in constructive and technical little expensive way, it is proposed that the constant pressure turbine has a gap through which the drive pressure air after passing twice the impellers of the turbine rotor to between the constant pressure turbine and the polishing pad or the grinding member arranged Druckluftleitvorrichtung is derivable.

Vorteilhaft ist die Druckluftleitvorrichtung als Hohlkanal in einer den Druckluftantrieb mit dem Polierkissen verbindenden Antriebswelle ausgebildet, an deren druckluftantriebsfernem Ende das Polierkissen bzw. das Schleifglied mittels eines Haltetellers befestigt ist, so dass die Antriebsdruckluft, nachdem sie den Druckluftantrieb durchströmt hat, entspannt und damit abgekühlt wurde, mit geringen technisch-konstruktiven Mitteln zum Polierkissen bzw. zum Schleifglied geleitet werden kann.Advantageously, the Druckluftleitvorrichtung is formed as a hollow channel in a compressed air drive with the polishing pad connecting drive shaft, the polishing pad or the grinding member is fixed by means of a holding plate at the end remote from the compressed air drive, so that the driving compressed air after it has flowed through the compressed air drive, relaxed and thus cooled , can be passed to the polishing pad or the grinding member with little technical-constructive means.

Die Abkühlung der den Druckluftantrieb verlassenden Antriebsdruckluft kann erhöht werden, wenn der Hohlkanal als Diffusor ausgebildet ist.The cooling of the compressed air drive leaving drive compressed air can be increased if the hollow channel is designed as a diffuser.

Um für das Polierkissen bzw. das Schleifglied einen optimalen Drehzahlbereich zur Verfügung zu stellen, ist es vorteilhaft, wenn zwischen dem Druckluftantrieb einerseits und der Abtriebswelle andererseits ein drehzahlreduzierendes Getriebe angeordnet ist.In order to provide an optimal speed range for the polishing pad or the grinding member, it is advantageous if a speed-reducing gear is arranged between the compressed-air drive on the one hand and the output shaft on the other hand.

Ein Abwürgen des Druckluftantriebs der Polier- oder Schleifvorrichtung wird in jedem Fall zuverlässig vermieden, wenn das Polierkissen bzw. das Schleifglied mittels der in ihm ausgebildeten und ein Schaufelgitter bildenden Luftkanäle als radiale Strömungsmaschine gestaltet ist, und der Anpressdruck der Polier- oder Schleifvorrichtung auf die Bearbeitungsfläche nicht den für eine fachmännische Bearbeitung zulässigen Wert übersteigt.Stalling the pneumatic drive of the polishing or grinding device is reliably avoided in each case when the polishing pad or the grinding member is designed by means of the formed therein and a blade grid forming air channels as a radial flow machine, and the contact pressure of the polishing or grinding device on the processing surface does not exceed the value allowed for professional processing.

Je nach Anforderungsprofil an die erfindungsgemäße Polier- oder Schleifvorrichtung kann das durch die Luftkanäle ausgebildete Schaufelgitter als Turbine oder alternativ auch als Verdichter gestaltet sein. Bei einer Ausgestaltung des Schaufelgitters als Turbine bzw. als Verdichter kann das Druckniveau unmittelbar stromab des Druckluftantriebs beeinflusst werden. Somit ist es möglich, den thermodynamischen Gesamtwicklungsgrad der Polier- oder Schleifvorrichtung und somit die Kühlleistung positiv zu beeinflussen.Depending on the requirement profile of the polishing or grinding device according to the invention, the blade grid formed by the air ducts may be designed as a turbine or alternatively as a compressor. In one embodiment of the blade grid as a turbine or as a compressor, the pressure level can be influenced immediately downstream of the compressed air drive. Thus, it is possible to positively influence the thermodynamic Gesamttwicklungsgrad the polishing or grinding device and thus the cooling performance.

Die praktische Anwendbarkeit der erfindungsgemäßen Poliervorrichtung wird weiter erhöht, wenn das Polierkissen aus einem bis zu einem vorgebbaren Grenzdruck formstabilen und bei Überschreiten dieses Grenzdrucks elastisch verformbaren Werkstoff ausgebildet ist.The practical applicability of the polishing apparatus according to the invention is further increased if the polishing pad is formed from a dimensionally stable up to a predetermined limit pressure and elastically deformable when exceeding this limit pressure material.

Im Folgenden wird die Erfindung anhand einer Ausführungsform unter Bezugnahme auf die Zeichnung näher erläutert.In the following the invention will be explained in more detail with reference to an embodiment with reference to the drawing.

Es zeigen:

Figur 1
eine Schnittdarstellung einer Ausführungsform einer erfindungsgemäßen Poliervorrichtung;
Figur 2
eine Unteransicht eines Polierkissens der in Figur 1 gezeigten Ausführungsform der erfindungsgemäßen Poliervorrichtung; und
Figur 3
eine Prinzipdarstellung eines Druckluftantriebs der in Figur 1 gezeigten Ausführungsform der erfindungsgemäßen Poliervorrichtung.
Show it:
FIG. 1
a sectional view of an embodiment of a polishing apparatus according to the invention;
FIG. 2
a bottom view of a polishing pad of in FIG. 1 shown embodiment of the polishing device according to the invention; and
FIG. 3
a schematic diagram of a pneumatic drive of in FIG. 1 shown embodiment of the polishing device according to the invention.

Eine im Folgenden anhand der Figuren 1 bis 3 erläuterte Ausführungsform einer erfindungsgemäßen Poliervorrichtung 1 dient dazu, lackierte Oberflächen, z.B. von Fahrzeugkarosserieteilen, zu polieren.One below based on the FIGS. 1 to 3 explained embodiment of a polishing device 1 according to the invention serves to polish painted surfaces, eg of vehicle body parts.

Hierzu hat die Poliervorrichtung 1 ein Polierkissen 2, welches in der dargestellten Ausführungsform kreisförmig ausgebildet ist. Das Polierkissen 2 wird mit seiner Unterfläche 3 in Anlage an die zu polierende Oberfläche gebracht und in eine Rotationsbewegung versetzt, so dass die Unterfläche 3 auf der zu polierenden Oberfläche mit einer vergleichsweise hohen Drehgeschwindigkeit rotiert.For this purpose, the polishing apparatus 1 has a polishing pad 2, which is circular in the illustrated embodiment. The polishing pad 2 is brought with its lower surface 3 in abutment against the surface to be polished and set in a rotational movement, so that the lower surface 3 rotates on the surface to be polished with a comparatively high rotational speed.

Zur Erzeugung der Rotationsbewegung dient ein Druckluftantrieb 4, dessen Antriebsenergie mittels einer Antriebswelle 5 zum Polierkissen 2 übertragen wird.To generate the rotational movement is a compressed air drive 4, the drive power is transmitted by a drive shaft 5 to the polishing pad 2.

Hierzu ist am druckluftantriebsfernen Ende der Antriebswelle 5 ein Halteteller 6 in geeigneter Weise drehfest angebracht, an dem seinerseits das Polierkissen 2 fixiert ist.For this purpose, a retaining plate 6 is rotatably attached in a suitable manner on the compressed air drive remote end of the drive shaft 5, on which in turn the polishing pad 2 is fixed.

Zur Poliervorrichtung 1 gehört des Weiteren ein Handgriff 7, durch den hindurch Antriebsdruckluft 8 zum Druckluftantrieb 4 geführt wird. Zur Regelung des Massenstroms der Antriebsdruckluft 8 ist im Handgriff 7 ein in den Figuren nicht gezeigtes Drosselventil vorgesehen, welches mittels einer am Handgriff 7 angelenkten Handhabe 9 verstellbar ist.To the polishing apparatus 1 further includes a handle 7 through which drive compressed air 8 is guided to the compressed air drive 4. To control the mass flow of the driving compressed air 8 is in the handle 7 a not shown in the figures Throttle valve provided, which is adjustable by means of a handle 7 hinged handle 9.

Die Antriebsdruckluft 8 wird durch einen in einem Gehäuse 10 der Poliervorrichtung 1 bzw. des Druckluftantriebs 4 vorgesehenen Druckluftkanal 11 zum Druckluftantrieb 4 geführt, der im dargestellten Ausführungsbeispiel als Gleichdruckturbine 4 ausgebildet ist.The drive compressed air 8 is guided by a provided in a housing 10 of the polishing device 1 and the compressed air drive 4 compressed air channel 11 to the pneumatic drive 4, which is formed in the illustrated embodiment as a constant pressure turbine 4.

Aus dem Druckluftkanal 11 wird die Antriebsdruckluft 8 zunächst über Schaufelräder 12 eines Turbinenrotors 13 der Gleichstromturbine 4 geführt, tritt dann in eine im Gehäuse des Druckluftantriebs 4 bzw. der Gleichdruckturbine 4 angeordnete Umkehrkammer 14 ein und wird dann, wie am besten aus Figur 3 hervorgeht, erneut über die Schaufelräder 12 des Turbinenrotors 13 geführt. Danach tritt die Antriebsdruckluft 8 in einen in der Gleichdruckturbine ausgebildeten Zwischenraum 15 ein und wird von dort in einen Hohlkanal 16 eingeleitet, der in der Antriebswelle 5 ausgebildet ist, die die Antriebsverbindung zwischen der Gleichstromturbine 4 einerseits und dem Polierkissen 2 andererseits herstellt. Zwischen der Gleichstromturbine 4 und der mit dem Hohlkanal 16 versehenen Antriebswelle 5 ist ein drehzahlreduzierendes Getriebe 17 angeordnet.From the compressed air channel 11, the drive pressure air 8 is first guided over paddle wheels 12 of a turbine rotor 13 of the DC turbine 4, then enters a arranged in the housing of the pneumatic drive 4 and the constant pressure turbine 4 reversing chamber 14 and then, as best of FIG. 3 emerges again guided over the paddle wheels 12 of the turbine rotor 13. Thereafter, the driving compressed air 8 enters a space formed in the constant pressure turbine gap 15 and is introduced from there into a hollow channel 16 which is formed in the drive shaft 5, which produces the drive connection between the DC turbine 4 on the one hand and the polishing pad 2 on the other. Between the DC turbine 4 and provided with the hollow channel 16 drive shaft 5, a speed-reducing transmission 17 is arranged.

Der den gleichdruckturbinenseitigen Zwischenraum 15 mit einem mittig im Polierkissen 2 ausgebildeten Hohlraum 18 verbindende Hohlkanal 16 der Antriebswelle 5 bildet mit dem Zwischenraum 15 und dem Hohlraum 18 eine Druckluftleitvorrichtung 15, 16, 18, mittels der die Antriebsdruckluft 8, nachdem sie den Druckluftantrieb bzw. die Gleichdruckturbine 4 der Poliervorrichtung angetrieben hat, zum Polierkissen 2 geführt wird. wie sich am besten aus Figur 2 ergibt, ist das Polierkissen 2 mit vom Hohlraum 18 sich zum Umfangsrand 19 des Polierkissens 2 erstreckenden Luftkanälen 20 ausgebildet. Die Luftkanäle 20 bilden im an der Unterfläche 3 bzw. nahe der Unterfläche 3 angeordneten Bereich des Polierkissens ein Schaufelgitter, mit der Folge, dass das Polierkissen 2 wie eine radiale Strömungsmaschine arbeitet.The equal pressure turbine side gap 15 with a centrally formed in the polishing pad 2 cavity 18 connecting hollow channel 16 of the drive shaft 5 forms with the gap 15 and the cavity 18 a Druckluftleitvorrichtung 15, 16, 18, by means of the compressed air drive 8, after the compressed air drive or the Equal pressure turbine 4 of the polishing device has driven, is guided to the polishing pad 2. how best FIG. 2 shows, the polishing pad 2 is formed with from the cavity 18 to the peripheral edge 19 of the polishing pad 2 extending air channels 20. The air channels 20 form a blade grid in the region of the polishing pad arranged on the lower surface 3 or near the lower surface 3, with the result that the polishing pad 2 operates like a radial flow machine.

Die stromauf des in der Antriebswelle 5 ausgebildeten Hohlkanals 16 als Antriebsmedium für die Gleichdruckturbine 4 der Poliervorrichtung 1 dienende Antriebsdruckluft, die beim Betrieb der Gleichdruckturbine 4 entspannt und damit kühler wird, dient im Bereich des Polierkissens 2 der Poliervorrichtung 1 als Kühlmedium, mittels dem die bei der Relativbewegung zwischen dem Polierkissen 2 einerseits und der zu polierenden Oberfläche andererseits entstehende Wärme gezielt und gesteuert aus dem Bereich des Polierkissens 2 abtransportiert werden kann. Im Falle der vorstehend geschilderten Poliervorrichtung 1 wird somit die Antriebsdruckluft 8, die im Bereich der Gleichdruckturbine 4 stark abkühlt, im Rahmen einer Sekundärnutzung zum Abtransport der beim Poliervorgang erzeugten Wärmeenergie genutzt.The upstream of the formed in the drive shaft 5 hollow channel 16 serving as a drive medium for the constant pressure turbine 4 of the polishing device 1 driving compressed air, which is relaxed during operation of the constant pressure turbine 4 and thus cooler, is used in the region of the polishing pad 2 of the polishing device 1 as a cooling medium by means of which at the relative movement between the polishing pad 2 on the one hand and the surface to be polished on the other hand heat can be selectively removed and controlled from the area of the polishing pad 2. In the case of the above-described polishing apparatus 1, the driving compressed air 8, which cools down strongly in the region of the constant pressure turbine 4, is thus used in the context of secondary use for the removal of the heat energy generated during the polishing process.

Im Betrieb der vorstehend geschilderten erfindungsgemäßen Poliervorrichtung 1 wird die Antriebsdruckluft 8, wie durch den Pfeil in Figur 1 dargestellt, durch den Handgriff 7 zur Gleichdruckturbine 4 geführt. Mittels des am bzw. im Handgriff 7 vorgesehenen Drosselventils kann der Massenstrom der Antriebsdruckluft 8 gesteuert werden.In operation of the above-described polishing apparatus 1 according to the invention, the driving compressed air 8, as indicated by the arrow in FIG FIG. 1 represented, led by the handle 7 to the constant pressure turbine 4. By means of the throttle valve provided on or in the handle 7, the mass flow of the driving compressed air 8 can be controlled.

Die Antriebsdruckluft 8 wird beim Durchtritt durch die Gleichdruckturbine 4 mittels der Umkehrkammer 14 so geführt, dass sie die Schaufelräder 12 des Turbinenrotors 13 zweimal passiert. Nach dem zweimaligen Passieren der Schaufelräder 12 wird die Antriebsdruckluft 8 durch den Zwischenraum 15 in der Gleichdruckturbine 4 dem in der Antriebswelle 5 ausgebildeten Hohlkanal 16 zugeführt. Beim Durchtritt durch die Gleichdruckturbine 4 hat sich die Antriebsdruckluft 8 stark abgekühlt.The driving compressed air 8 is guided during passage through the constant pressure turbine 4 by means of the reversing chamber 14 so that it passes through the paddle wheels 12 of the turbine rotor 13 twice. After passing twice the paddle wheels 12, the drive pressure air 8 is supplied through the intermediate space 15 in the constant pressure turbine 4 to the formed in the drive shaft 5 hollow channel 16. When passing through the constant pressure turbine 4, the drive pressure air 8 has cooled strongly.

Durch den Hohlkanal 16 strömt die nunmehr abgekühlte Antriebsdruckluft 8 der mittels des Polierkissens 2 bearbeiteten Oberfläche entgegen.Through the hollow channel 16, the now cooled drive compressed air 8 flows against the surface processed by means of the polishing pad 2.

Die ungehinderte Abströmung der Antriebsdruckluft 8 wird im Bereich des Polierkissens 2 dadurch gewährleistet, dass das Polierkissen 2 - wie vorstehend bereits erwähnt - mittels der Luftkanäle 20 als radiale Strömungsmaschine gestaltet ist.The unobstructed outflow of the driving compressed air 8 is ensured in the region of the polishing pad 2 in that the polishing pad 2 - as already mentioned above - is designed by means of the air channels 20 as a radial flow machine.

Durch die abgekühlte Antriebsdruckluft 8 wird eine Kühlung der behandelten Oberfläche gewährleistet, wobei darüber hinaus für einen beschleunigten Abtransport der Lösungsmittel aus dem frischen Lack gesorgt werden kann.Due to the cooled drive compressed air 8, a cooling of the treated surface is ensured, in addition, can be provided for an accelerated removal of the solvent from the fresh paint beyond.

Claims (14)

Polier- oder Schleifvorrichtung zum Polieren oder Schleifen lackierter Oberflächen, mit einem zentrisch oder exzentrisch rotierbaren Polierkissen (2) bzw. Schleifglied, das mit seiner Unterfläche (3) in Anlage an die zu polierende bzw. zu schleifende Oberfläche bringbar ist, und einem Druckluftantrieb (4), mittels dem das Polierkissen (2) bzw. das Schleifglied rotierbar ist, dadurch gekennzeichnet, dass zwischen dem Druckluftantrieb (4) und dem Polierkissen (2) bzw. dem Schleifglied eine Druckluftleitvorrichtung (15, 16, 18) angeordnet ist, mittels der die Antriebsdruckluft (8) des Druckluftantriebs (4) von der Ausgangsseite desselben zum Polierkissen (2) bzw. zum Schleifglied leitbar ist, und dass das Polierkissen (2) bzw. das Schleifglied im Bereich seiner Unterfläche (3) mit Luftkanälen (20) ausgebildet ist, durch die hindurch die Antriebsdruckluft (8) von einem mittleren Bereich der Unterfläche (3) des Polierkissens (2) bzw. des Schleifglieds zum Umfangsrand (19) des Polierkissens (2) bzw. des Schleifglieds ableitbar ist.Polishing or grinding device for polishing or grinding painted surfaces, with a centrically or eccentrically rotatable polishing pad (2) or grinding member which can be brought with its lower surface (3) in abutment against the surface to be polished or ground, and a compressed-air drive ( 4), by means of which the polishing pad (2) or the grinding member is rotatable, characterized in that between the compressed air drive (4) and the polishing pad (2) or the grinding member a Druckluftleitvorrichtung (15, 16, 18) is arranged by means the driving compressed air (8) of the pneumatic drive (4) from the output side thereof to the polishing pad (2) or the grinding member is conductive, and that the polishing pad (2) or the grinding member in the region of its lower surface (3) with air channels (20) is formed, through which the driving compressed air (8) from a central region of the lower surface (3) of the polishing pad (2) and the grinding member to the peripheral edge (19) of Polierki Ssens (2) and the grinding member is derivable. Polier- oder Schleifvorrichtung nach Anspruch 1, bei der die im Bereich der Unterfläche (3) des Polierkissens (2) bzw. des Schleifglieds ausgebildeten Luftkanäle (20) an der Unterfläche (3) des Polierkissens (2) bzw. des Schleifglieds offen sind.A polishing or grinding apparatus according to claim 1, wherein the air channels (20) formed in the region of the lower surface (3) of the polishing pad (2) and the grinding member are open on the lower surface (3) of the polishing pad (2) and the grinding member, respectively. Polier- oder Schleifvorrichtung nach Anspruch 1, bei der die im Bereich der Unterfläche (3) des Polierkissens (2) bzw. des Schleifglieds ausgebildeten Luftkanäle (20) an der Unterfläche (3) des Polierkissens (2) bzw. des Schleifglieds geschlossen sind.The polishing or grinding apparatus according to claim 1, wherein the air channels (20) formed in the area of the lower surface (3) of the polishing pad (2) and the grinding member are closed on the lower surface (3) of the polishing pad (2) and the grinding member, respectively. Polier- oder Schleifvorrichtung nach einem der Ansprüche 1 bis 3, mit einem Handgriff (7), durch den hindurch die Antriebsdruckluft (8) dem Druckluftantrieb (4) zuführbar ist.Polishing or grinding device according to one of claims 1 to 3, with a handle (7), through which the drive compressed air (8) the compressed air drive (4) can be fed. Polier- oder Schleifvorrichtung nach Anspruch 4, mit einem Drosselventil, dessen Handhabe (9) am Handgriff (7) angeordnet ist und mittels dem der Massenstrom der Antriebsdruckluft (8) steuerbar ist.Polishing or grinding device according to claim 4, with a throttle valve, the handle (9) on the handle (7) is arranged and by means of which the mass flow of the driving compressed air (8) is controllable. Polier- oder Schleifvorrichtung nach einem der Ansprüche 1 bis 5, deren Druckluftantrieb als Gleichdruckturbine (4) mit einem Turbinenrotor (13) und einer Umkehrkammer (14) ausgebildet ist, so dass die Antriebsdruckluft (8) Schaufelräder (12) des Turbinenrotors (13) zumindest zweimal passiert.Polishing or grinding device according to one of claims 1 to 5, whose compressed air drive is designed as a constant pressure turbine (4) with a turbine rotor (13) and a reversing chamber (14), so that the driving compressed air (8) paddle wheels (12) of the turbine rotor (13) at least twice happens. Polier- oder Schleifvorrichtung nach Anspruch 6, bei dem die Gleichdruckturbine (4) einen Zwischenraum (15) aufweist, durch den hindurch die Antriebsdruckluft (8) nach zweimaligem Passieren der Schaufelräder (12) des Turbinenrotors zur zwischen der Gleichdruckturbine (4) und dem Polierkissen (2) bzw. dem Schleifglied angeordneten Druckluftleitvorrichtung (15, 16, 18) ableitbar ist.A polishing or grinding apparatus according to claim 6, wherein said constant pressure turbine (4) has a clearance (15) through which said driving compressed air (8) passes twice said turbine rotor blades (12) between said constant pressure turbine (4) and said polishing pad (2) or the grinding member arranged Druckluftleitvorrichtung (15, 16, 18) is derivable. Polier- oder Schleifvorrichtung nach einem der Ansprüche 1 bis 7, bei der die Druckluftleitvorrichtung (15, 16, 18) als Hohlkanal (16) in einer den Druckluftantrieb (4) mit dem Polierkissen (2) verbindenden Antriebswelle (5) ausgebildet ist, an deren druckluftantriebsfernem Ende das Polierkissen (2) bzw. das Schleifglied mittels eines Haltetellers (6) befestigt ist.Polishing or grinding device according to one of claims 1 to 7, wherein the Druckluftleitleitvorrichtung (15, 16, 18) as a hollow channel (16) in the compressed air drive (4) with the polishing pad (2) connecting the drive shaft (5) is formed on whose Druckluftantriebsfernem end of the polishing pad (2) or the grinding member by means of a retaining plate (6) is attached. Polier- oder Schleifvorrichtung nach Anspruch 8, bei der der Hohlkanal (16) als Diffusor ausgebildet ist.Polishing or grinding device according to claim 8, wherein the hollow channel (16) is designed as a diffuser. Polier- oder Schleifvorrichtung nach einem der Ansprüche 1 bis 9, bei der zwischen dem Druckluftantrieb (4) und der Antriebswelle (5) ein drehzahlreduzierendes Getriebe (17) angeordnet ist.Polishing or grinding device according to one of claims 1 to 9, wherein between the compressed air drive (4) and the drive shaft (5) a speed-reducing gear (17) is arranged. Polier- oder Schleifvorrichtung nach einem der Ansprüche 1 bis 10, bei der das Polierkissen (2) bzw. das Schleifglied mittels der in ihm ausgebildeten und ein Schaufelgitter bildenden Luftkanäle (20) als radiale Strömungsmaschine gestaltet ist.Polishing or grinding device according to one of Claims 1 to 10, in which the polishing pad (2) or the grinding member is designed as a radial flow machine by means of the air ducts (20) formed in it and forming a blade grid. Polier- oder Schleifvorrichtung nach Anspruch 11, bei der das durch die Luftkanäle ausgebildete Schaufelgitter als Turbine gestaltet ist.A polishing or grinding apparatus according to claim 11, wherein the vane grille formed by the air passages is configured as a turbine. Polier- oder Schleifvorrichtung nach Anspruch 11, bei der das durch die Luftkanäle ausgebildete Schaufelgitter als Verdichter gestaltet ist.A polishing or grinding apparatus according to claim 11, wherein the vane grille formed by the air passages is configured as a compressor. Poliervorrichtung nach einem der Ansprüche 1 bis 13, deren Polierkissen (2) aus einem bis zu einem Grenzdruck formstabilen und bei Überschreiten des Grenzdrucks sich elastisch verformenden Werkstoff ausgebildet ist.Polishing device according to one of claims 1 to 13, whose polishing pad (2) is formed from a dimensionally stable up to a limiting pressure and elastically deforming material when the limit pressure is exceeded.
EP10002148.4A 2009-03-14 2010-03-03 Polishing or grinding device with a pneumatic drive Not-in-force EP2228173B1 (en)

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EP2528713A1 (en) 2010-01-26 2012-12-05 Dynabrade, Inc. Abrading device having a front exhaust
CN105415157A (en) * 2015-11-26 2016-03-23 安徽鼎远金属制品有限公司 Polishing device for damping framework
CN106363515A (en) * 2016-11-14 2017-02-01 无锡溥汇机械科技有限公司 Mechanical polishing device for faucet production process
CN113001381A (en) * 2021-03-23 2021-06-22 合肥中科重明科技有限公司 Surface polishing device for 3D printing blank and operation method
CN113561055A (en) * 2020-07-30 2021-10-29 赣州市业润自动化设备有限公司 Chemical mechanical grinding head

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DE102010006122A1 (en) 2010-01-26 2011-07-28 Kochanski, Boris, Dipl.-Ing., 46240 Compressed air operated machine mainly for polishing or grinding a workpiece with cooling thereof, generated by unused drive power
DE202011004232U1 (en) 2011-03-21 2011-05-26 Kochanski, Boris, Dipl.-Ing., 46240 Eccentric polishing or grinding device with cooling by driving compressed air
DE102011014653A1 (en) 2011-03-21 2012-09-27 Boris Kochanski Polishing or grinding device i.e. pressurized air power tool, for polishing or grinding coated surface i.e. motor car part, in automobile industry, has pressurized air guide device comprising work spindle rotatable in air guidance cup
CN109093518B (en) * 2018-09-11 2024-05-03 陕西富泰工业材料科技有限公司 Diamond grinding wheel is with installation protection device

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EP2528713A1 (en) 2010-01-26 2012-12-05 Dynabrade, Inc. Abrading device having a front exhaust
EP2528713A4 (en) * 2010-01-26 2013-07-31 Dynabrade Abrading device having a front exhaust
CN105415157A (en) * 2015-11-26 2016-03-23 安徽鼎远金属制品有限公司 Polishing device for damping framework
CN106363515A (en) * 2016-11-14 2017-02-01 无锡溥汇机械科技有限公司 Mechanical polishing device for faucet production process
CN106363515B (en) * 2016-11-14 2018-07-10 无锡溥汇机械科技有限公司 A kind of tap production technology mechanical polishing apparatus
CN113561055A (en) * 2020-07-30 2021-10-29 赣州市业润自动化设备有限公司 Chemical mechanical grinding head
CN113001381A (en) * 2021-03-23 2021-06-22 合肥中科重明科技有限公司 Surface polishing device for 3D printing blank and operation method

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EP2228173B1 (en) 2014-09-10
EP2228173A3 (en) 2011-05-25
DE202010013895U1 (en) 2010-12-16
DE102009013263A1 (en) 2010-09-16

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