EP0836542A1 - Manual grinding machine-tool and grinding tool - Google Patents

Manual grinding machine-tool and grinding tool

Info

Publication number
EP0836542A1
EP0836542A1 EP96918586A EP96918586A EP0836542A1 EP 0836542 A1 EP0836542 A1 EP 0836542A1 EP 96918586 A EP96918586 A EP 96918586A EP 96918586 A EP96918586 A EP 96918586A EP 0836542 A1 EP0836542 A1 EP 0836542A1
Authority
EP
European Patent Office
Prior art keywords
cushion
grinding
tool
grinder according
hand grinder
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
EP96918586A
Other languages
German (de)
French (fr)
Other versions
EP0836542B1 (en
Inventor
Joachim Schadow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0836542A1 publication Critical patent/EP0836542A1/en
Application granted granted Critical
Publication of EP0836542B1 publication Critical patent/EP0836542B1/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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor

Definitions

  • the invention is based on a hand-held grinding machine tool and a tool according to the preamble of claims 1 and 10.
  • Manual grinding machine tools are already known in which between the part performing the grinding movement, i.e. an elastic pad is arranged on the sanding plate and the surface abrasive, in particular the sanding sheet.
  • the elastic cushion causes a large pressure distribution between the hand grinding tool and the workpiece, so that uniform material removal from the workpiece surface is possible.
  • the cushions known hitherto are essentially flat bodies, which work satisfactorily when lying on flat workpiece surfaces, but which are not very suitable for machining profiled surfaces, because they come into contact with lines or points and, as a result, result in grinding abrasion destroy profiled surfaces.
  • the use of profile cushions with the negative profile of the workpiece surfaces is not known.
  • the hand tool according to the invention or the corresponding tool with the characterizing features of the independent claims 1 and 5 have the advantage over the fact that a grinding tool which can be quickly adapted to the workpiece profiles exists and with which the extremely time-saving and exactly also relatively complicated surface profiles bear - are editable such as Turned banister handrails or elongated, cylindrical bodies such as boat hulls or aircraft parts.
  • the elastic cushion forms an impression of the workpiece surface to be machined, in that after the tool has been stamped onto the workpiece surface with the cushion, the air is filled with soft or hard, coarse or fine-grained granules airtight pillow is pumped outside.
  • the cushion now retains the shape of the workpiece surface. With this cushion, both reciprocating as well as rotating driven sanding pads of hand grinders can be equipped.
  • the sanding plate is moved to the other plant again piece placed, whereby the vacuum is removed by opening a valve in the sanding pad.
  • the granulate parts can rearrange and form an impression of a workpiece surface again.
  • the cushion cover has an elastic, balloon-like structure, so that it can be inflated before being filled with granules and does not form folds during the subsequent air evacuation if the cushion volume is reduced.
  • the granular filling consists of porous, elastic material, so that the cushion can yield elastically when placed on a workpiece and a gentle pressure transmission takes place or too hard does not occur.
  • the elastic cushion is provided with a retractable valve that does not hinder the operation of the grinding tool and if the hand-held machine tool carries a vacuum pump so that it cannot be lost.
  • the air-evacuated cushion filled with elastic granules has the advantage that it can be used both with grinding tools with a rotating grinding tool and with reciprocating or as a base for hand-held belt grinders or as a covering for the drive or deflection roller of hand-held belt grinders , so that with all the known devices that can previously only be used for flat grinding work, arbitrarily profiled workpiece surfaces can be machined to size, over a large area, the grinding pad hardness being variable by more or less strong evacuation. Both the base and the end faces of the cushion can be profiled as required and used for grinding.
  • FIG. 1 shows a linear grinder with a longitudinally profiled, elastic cushion in partial longitudinal section
  • FIG. 2 shows a front view of the linear grinder according to FIG. 1
  • FIG. 3 shows an eccentric grinder, the grinding plate cushion of which has a concavely curved working surface
  • FIG. 4 shows a belt grinder profilable cushion instead of a pressure plate 5 shows a cross section of the cushion and the sanding belt according to FIG. 4.
  • the linear grinder 10 shown in Figure 1 consists of a motor housing 12 with a handle 14 which carries a key 16 of an on and off switch, not shown.
  • a drive shaft 18 emerging downward from the motor housing 12 carries an eccentric pin 20 which is coupled via roller bearings 22 to a movement transmission element 24 and via this to a grinding plate 26.
  • the grinding plate 26 is fastened to the motor housing 12 of the linear grinder 10 via elastic vibrating columns 28, 29.
  • the grinding plate 26 is a flat sheet metal part and carries an elastic cushion 30 on its lower side. This consists of a gas-tight outer skin 32 and a filling 34, which consists of a granulate, in particular made of plastic.
  • the elastic cushion 30 In its upper area facing the grinding plate 26, the elastic cushion 30 carries a valve 36, which is covered with a valve cover cap 38 to protect it from dust.
  • the underside 31 of the cushion 30 carries a sliding sheet 33 which adapts to a longitudinally concave profile of the underside 31.
  • a continuous Line shows a profile edge 37 embossed deeply into the underside 31 of the cushion 30.
  • FIG. 2 shows a view of the linear grinder 10 from the front.
  • the double concave underside 31 of the pad 30, which adapts the sanding sheet 33, can be clearly seen here, for example by fastening with a Velcro fastener. If this cushion 30 is placed on a corresponding profile to which it was previously adapted, the curved surfaces of the workpiece can thus be machined over a large area with uniform pressure in the longitudinal direction.
  • an eccentric grinder 50 is shown with a motor housing 52 which is provided with a handle 54 which carries a button 56 of an electrical on and off switch.
  • the orbital sander 50 carries a sanding plate 58 with an elastic cushion 60, which is provided with a gas-tight skin 62 and with a filling 64 is filled from elastic granules.
  • the working surface 66 of the elastic pad 60 carries an abrasive sheet 68 and is concavely curved as an imprint of a convex workpiece with a radius of curvature R.
  • the abrasive sheet 68 adapts to the concave shape of the working surface 66 and can thus be rotated about its vertical axis when the abrasive disc 58 is rotated. For example, in the direction of arrow 69, machine a workpiece surface that is convexly curved with radius R over a large area.
  • the elastic cushion 60 carries on its upper side a valve 70 which can be closed in a dust-tight manner with a valve cover cap 72.
  • the hand-held belt sander 80 shown in FIG. 4 consists of a housing 82 with a handle 84.
  • the handle 84 carries a key 86 of an electrical on and off switch, not shown.
  • the hand belt sander 80 carries two axially parallel rollers 88, 90 with a circumferential grinding belt 92. Between the rollers 88, 90 there is a pressure plate 94, which is the underside of an elastic cushion which is provided with a filling 96 which is made of elastic granules exist. On its upper side, the pressure plate 94 carries a valve 98 with a cover cap 100.
  • the roller 90 also carries a hollow cylindrical, pillow-like casing 102.
  • the casing 102 is provided with a filling 103 made of elastic granules.
  • the roller 90 carries a valve 104 which can be closed with a cover cap (not shown).
  • FIG. 5 shows a cross section through the pressure plate 94, the concave profile 95 of which can be seen with the radius R.
  • the grinding belt 92 adapts to this profile 95 shape with its curvature 93 without further ado. If the hand belt sander 80 is guided over a tube which is convexly curved with the radius R, this is particularly effective and can be sanded over a large area quickly. Here there is a large-area contact between the sanding belt 92 and the curved workpiece and not a line contact as in the case of flat hand-belt sanders.
  • an elastic cushion is inflated like a balloon and filled with granules. By releasing the excess pressure from this cushion, the granulate is pressed together by the cushion's structural elasticity. Only a slight negative pressure is required here in order to make impressions of the workpiece surfaces to be machined by means of the cushion.
  • the use of granules, the individual granulate bodies of which have a high roughness or non-round surfaces, which promote interlocking of the granulate bodies, is particularly advantageous for a dimensional stability of the pillow even with high forces acting on the pillow.

Abstract

A manual grinding machine (10; 50; 50) with a grinding tool has an elastic pad (30; 60; 94) arranged between an abrasive means, in particular an abrasive disk, and a rubbing plate. In order to make this manual grinding machine particularly suitable for grinding profiled workpieces, the pad (30; 60; 94) is designed as an easily deformable container with a variable volume that may be closed in a gas-tight manner and evacuated and that can receive a granulated filling material or the like (34; 64; 96).

Description

Handschleifwerkzeugmaschine und SchleifwerkzeugHand grinding machine tool and grinding tool
Stand der TechnikState of the art
Die Erfindung geht aus von einer Handschleifwerkzeugmaschine und einem Werkzeug nach dem Oberbegriff der Ansprüche 1 und 10.The invention is based on a hand-held grinding machine tool and a tool according to the preamble of claims 1 and 10.
Es sind bereits Handschleifwerkzeugmaschinen bekannt, bei denen zwischen dem die Schleifbewegung ausführenden Teil, d.h. dem Schleifteller, und dem Flächenschleifmittel, insbe¬ sondere dem Schleifblatt, ein elastisches Kissen angeordnet ist. Das elastischen Kissen bewirkt eine großflächige Druck¬ verteilung zwischen dem Handschleifwerkzeug und dem Werk¬ stück, so daß ein gleichmäßiger Werkstoffabtrag von der Werkstückfläche möglich ist.Manual grinding machine tools are already known in which between the part performing the grinding movement, i.e. an elastic pad is arranged on the sanding plate and the surface abrasive, in particular the sanding sheet. The elastic cushion causes a large pressure distribution between the hand grinding tool and the workpiece, so that uniform material removal from the workpiece surface is possible.
Die bisher bekannten Kissen sind im wesentlichen ebene Kör¬ per, die zwar beim Aufliegen auf ebenen Werkstückflächen zu¬ friedenstellend arbeiten, die aber zum Bearbeiten profilier¬ ter Oberflächen wenig geeignet sind, weil sie in Linien¬ bzw. Punktberührung treten und dadurch bei Schleifabtrag die profilierten Oberflächen zerstören. Die Verwendung von Profilkissen mit dem Negativprofil der Werkstückoberflächen ist nicht bekannt.The cushions known hitherto are essentially flat bodies, which work satisfactorily when lying on flat workpiece surfaces, but which are not very suitable for machining profiled surfaces, because they come into contact with lines or points and, as a result, result in grinding abrasion destroy profiled surfaces. The use of profile cushions with the negative profile of the workpiece surfaces is not known.
Insbesondere das Schleifen von langgestreckten Außen- oder Innenzylinderflächen, beispielsweise an Bootskörpern, Flug¬ zeugen, Treppengeländer-Handläufen oder dergl. ist aufgrund des Fehlens entsprechender Werkzeuge sehr zeitaufwendig, wo¬ bei die Gefahr besteht, daß aufgrund der Linienberührung ein ungleichmäßiger Flächenabtrag erfolgt und die zu bearbeiten- de Oberfläche deformiert wird.In particular, the grinding of elongated outer or inner cylinder surfaces, for example on boat hulls, airplanes, banister handrails or the like, is very time-consuming due to the lack of appropriate tools, with the risk that an uneven surface removal will occur due to the line contact and the surface to be machined is deformed.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Handwerkzeugmaschine bzw. das entspre- chende Werkzeug mit den kennzeichnenden Merkmalen der unab¬ hängigen Ansprüche 1 und 5 haben demgegenüber den Vorteil, daß ein an die Werkstückprofile schnell anpaßbares Schleif¬ werkzeug existiert, mit dem äußerst zeitsparend und genau auch verhältnismäßig komplizierte Oberflächenprofile bear- beitbar sind wie z.B. gedrechselte Treppengeländer-Handläufe bzw. langgestreckte, zylinderische Körper wie Bootskörper bzw. Flugzeugteile.The hand tool according to the invention or the corresponding tool with the characterizing features of the independent claims 1 and 5 have the advantage over the fact that a grinding tool which can be quickly adapted to the workpiece profiles exists and with which the extremely time-saving and exactly also relatively complicated surface profiles bear - are editable such as Turned banister handrails or elongated, cylindrical bodies such as boat hulls or aircraft parts.
Dies wird dadurch erreicht, daß das elastische Kissen einen Abdruck der zu bearbeitenden Werkstückoberfläche bildet, in¬ dem nach dem stempelartigen Aufsetzen des Werkzeugs mit dem Kissen auf die Werkstückoberfläche die Luft aus dem mit wei¬ chem oder hartem, grob- oder feinkörnigem Granulat gefüll¬ ten, außen luftdichten Kissen gepumpt wird. Das Kissen be- hält nun die Abdruckform der Werkstückoberfläche. Mit diesem Kissen können sowohl hin- und hergehende, als auch rotierend angetriebene Schleifteller von Handschleifmaschinen bestückt werden.This is achieved in that the elastic cushion forms an impression of the workpiece surface to be machined, in that after the tool has been stamped onto the workpiece surface with the cushion, the air is filled with soft or hard, coarse or fine-grained granules airtight pillow is pumped outside. The cushion now retains the shape of the workpiece surface. With this cushion, both reciprocating as well as rotating driven sanding pads of hand grinders can be equipped.
Soll ein Werkstück mit einer anderen Profilform bearbeitet werden, wird der Schleifteller erneut auf das andere Werk stück aufgesetzt, wobei durch Öffnen eines Ventils im Schleifkissen der Unterdruck beseitigt wird. Dadurch können sich die Granulatteile neu ordnen und erneut einen Abdruck einer Werkstückoberfläche bilden.If a workpiece is to be machined with a different profile shape, the sanding plate is moved to the other plant again piece placed, whereby the vacuum is removed by opening a valve in the sanding pad. As a result, the granulate parts can rearrange and form an impression of a workpiece surface again.
Von besonderem Vorteil ist es, wenn die Kissenhülle einen elastischen, ballonartigen Aufbau hat, so daß sie vor dem Füllen mit Granulat aufblasbar ist und beim anschließenden Luft-Evakuieren keine Falten bildet wenn das Kissen-Volumen verringert wird.It is particularly advantageous if the cushion cover has an elastic, balloon-like structure, so that it can be inflated before being filled with granules and does not form folds during the subsequent air evacuation if the cushion volume is reduced.
Außerdem ist es von Vorteil, daß die granulatartige Füllung aus porigem, elastischem Material besteht, so daß das Kissen bei Auflage auf ein Werkstück elastisch nachgeben kann und eine sanfte Drückübertragung erfolgt bzw. eine zu harte un- terbleibt.In addition, it is advantageous that the granular filling consists of porous, elastic material, so that the cushion can yield elastically when placed on a workpiece and a gentle pressure transmission takes place or too hard does not occur.
Darüberhinaus ist es vorteilhaft, wenn das elastische Kissen mit einem versenkbaren, den Betrieb des Schleifwerkzeug nicht behindernden Ventil versehen ist und wenn die Hand- Werkzeugmaschine unverlierbar eine Unterdruckpumpe trägt.In addition, it is advantageous if the elastic cushion is provided with a retractable valve that does not hinder the operation of the grinding tool and if the hand-held machine tool carries a vacuum pump so that it cannot be lost.
Das luftevakuierbare mit elastischem Granulat gefüllte Kis¬ sen hat den Vorteil, daß es sowohl bei Schleifwerkzeugen mit rotierendem Schleifwerkzeug als auch mit hin- und hergehen- dem bzw. als Unterlage bei Handbandschleifern oder als Über¬ zug der Antriebs- oder Umlenkrolle von Handbandschleifern einsetzbar ist, so daß mit all den bekannten, bisher nur für ebene Schleifarbeiten einsetzbaren Geräten beliebig profi¬ lierte Werkstückoberflächen maßgetreu, großflächig bearbeit- bar sind, wobei die Schleifkissenhärte durch mehr oder weni¬ ger starkes Evakuieren varrierbar ist. Dabei sind sowohl die Grundfläche als auch die Stirnflächen des Kissens beliebig profilierbar und zur schleifenden Bearbeitung einsetzbar.The air-evacuated cushion filled with elastic granules has the advantage that it can be used both with grinding tools with a rotating grinding tool and with reciprocating or as a base for hand-held belt grinders or as a covering for the drive or deflection roller of hand-held belt grinders , so that with all the known devices that can previously only be used for flat grinding work, arbitrarily profiled workpiece surfaces can be machined to size, over a large area, the grinding pad hardness being variable by more or less strong evacuation. Both the base and the end faces of the cushion can be profiled as required and used for grinding.
Weitere, vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. ZeichnungFurther advantageous embodiments of the invention result from the dependent claims. drawing
Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung anhand der zugehörigen Zeichnung näher erläu- tert.Exemplary embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawing.
Es zeigen Figur 1 einen Linearschleifer mit längsprofilier¬ tem, elastischen Kissen im Teillängsschnitt, Figur 2 eine Vorderansicht des Linearschleifers gemäß Figur 1, Figur 3 einen Exzenterschleifer, dessen Schleiftellerkissen eine konkav gewölbte Arbeitsfläche aufweist, Figur 4 einen Band¬ schleifer profilbarem Kissen anstelle einer Andruckplatte im Teillängsschnitt und Figur 5 einen Querschnitt des Kissens und des Schleifbandes gemäß Figur 4.FIG. 1 shows a linear grinder with a longitudinally profiled, elastic cushion in partial longitudinal section, FIG. 2 shows a front view of the linear grinder according to FIG. 1, FIG. 3 shows an eccentric grinder, the grinding plate cushion of which has a concavely curved working surface, FIG. 4 shows a belt grinder profilable cushion instead of a pressure plate 5 shows a cross section of the cushion and the sanding belt according to FIG. 4.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Der in Figur 1 gezeigte Linearschleifer 10 besteht aus einem Motorgehäuse 12 mit einem Handgriff 14, der eine Taste 16 eines nicht dargestellten An- und Ausschalters trägt. Eine aus dem Motorgehäuse 12 nach unten austretende Antriebswelle 18 trägt einen Exzenterzapfen 20, der über Wälzlager 22 mit einem Bewegungsübertragungsglied 24 und über dieses mit ei¬ nem Schleifteller 26 gekoppelt ist. Der Schleifteller 26 ist über elastische Schwingsäulen 28, 29 am Motorgehäuse 12 des Linearschleifers 10 befestigt. Der Schleifteller 26 ist ein flaches Blechteil und trägt auf seiner unteren Seite ein elastisches Kissen 30. Dieses besteht aus einer gasdichten Außenhaut 32 und einer Füllung 34, die aus einem Granulat insbesondere aus Kunststoff besteht. In seinem oberen, dem Schleifteller 26 zugewandten Bereich trägt das elastische Kissen 30 ein Ventil 36, das mit einer Ventilabdeckkappe 38 gegen Staub geschützt überdeckt ist. Die Unterseite 31 des Kissens 30 trägt ein Schleiblatt 33, das sich einem Längs- konkav-Profil der Unterseite 31 anpaßt. Eine durchgehende Linie zeigt eine tief in die Unterseite 31 des Kissens 30 eingeprägte Profilkante 37.The linear grinder 10 shown in Figure 1 consists of a motor housing 12 with a handle 14 which carries a key 16 of an on and off switch, not shown. A drive shaft 18 emerging downward from the motor housing 12 carries an eccentric pin 20 which is coupled via roller bearings 22 to a movement transmission element 24 and via this to a grinding plate 26. The grinding plate 26 is fastened to the motor housing 12 of the linear grinder 10 via elastic vibrating columns 28, 29. The grinding plate 26 is a flat sheet metal part and carries an elastic cushion 30 on its lower side. This consists of a gas-tight outer skin 32 and a filling 34, which consists of a granulate, in particular made of plastic. In its upper area facing the grinding plate 26, the elastic cushion 30 carries a valve 36, which is covered with a valve cover cap 38 to protect it from dust. The underside 31 of the cushion 30 carries a sliding sheet 33 which adapts to a longitudinally concave profile of the underside 31. A continuous Line shows a profile edge 37 embossed deeply into the underside 31 of the cushion 30.
Mittels einer nicht dargestellten, auf das Ventil 36 auf- setzbaren Unterdruckpumpe kann die im Kissen 30 enthalteneBy means of a vacuum pump (not shown), which can be placed on the valve 36, the vacuum pump contained in the cushion 30 can
Luft evakuiert werden. Dadurch entsteht im Kissen 30 ein Un¬ terdruck. Infolge des Unterdrucks wird die Füllung 34 in ih¬ rer jeweiligen Position festgehalten. Wird dabei das Kissen 30 auf eine profilierte Unterlage gedrückt, entsteht auf der Unterseite 33 des Kissens 30 ein Abdruck der Unterlage, der durch Luftevakuieren fixierbar ist. Der Schleifteller 26 ist entsprechend dem Bewegungspfeil 40 linear hin- und herbeweg¬ bar.Air to be evacuated. This creates a vacuum in the cushion 30. As a result of the negative pressure, the filling 34 is held in its respective position. If the cushion 30 is pressed onto a profiled base, an impression of the base is formed on the underside 33 of the cushion 30, which can be fixed by air evacuation. The grinding plate 26 can be moved back and forth linearly in accordance with the movement arrow 40.
In Figur 2 ist eine Ansicht des Linearschleifers 10 von vorn gezeigt. Hier ist deutlich die zweifach konkav gewölbte Un¬ terseite 31 des Kissens 30 erkennbar, der sich das Schleif¬ blatt 33 anpaßt, beispielsweise durch Befestigung mit einem Klettverschluß. Wird dieses Kissen 30 auf ein entsprechendes Profil gesetzt, an das es vorher angepaßt wurde, können da¬ mit die gewölbten Flächen des Werkstücks großflächig mit gleichmäßigem Druck in Längsrichtung bearbeitet werden.FIG. 2 shows a view of the linear grinder 10 from the front. The double concave underside 31 of the pad 30, which adapts the sanding sheet 33, can be clearly seen here, for example by fastening with a Velcro fastener. If this cushion 30 is placed on a corresponding profile to which it was previously adapted, the curved surfaces of the workpiece can thus be machined over a large area with uniform pressure in the longitudinal direction.
Im Unterschied zu herkömmlichen Schleifgeräten liegt hier keine Linienberührung, sondern eine großflächige Berührung zwischen dem Werkzeug bzw. einem Schleifpapier 33 und einem Werkstück vor. Die Bearbeitung geht schneller vonstatten und das Schleifblatt 33 wird gleichmäßig abgenutzt und hat da¬ durch eine längere Standzeit als bei ebenen Werkzeugen.In contrast to conventional grinding devices, there is no line contact here, but rather a large-area contact between the tool or an abrasive paper 33 and a workpiece. The processing takes place faster and the sanding sheet 33 is evenly worn and therefore has a longer service life than with flat tools.
In Figur 3 ist ein Exzenterschleifer 50 gezeigt mit einem Motorgehäuse 52, das mit einem Handgriff 54 versehen ist, der einen Taster 56 eines elektrischen Ein- und Ausschalters trägt. An seinem unteren Ende trägt der Exzenterschleifer 50 einen Schleifteller 58 mit einem elastisches Kissen 60, das mit einer gasdichten Haut 62 versehen und mit einer Füllung 64 aus elastischem Granulat gefüllt ist. Die Arbeitsfläche 66 des elastischen Kissens 60 trägt ein Schleifblatt 68 und ist konkav gewölbt als Abdruck eines konvexen Werkstücks mit einem Krümmungsradius R. Das Schleifblatt 68 paßt sich der konkaven Form der Arbeitsfläche 66 an und kann dadurch bei Drehung des Schleiftellers 58 um seine senkrechte Achse, beispielsweise in Pfeilrichtung 69, ein konvex mit dem Ra¬ dius R gekrümmte Werkstückoberfläche großflächig bearbeiten.In Figure 3, an eccentric grinder 50 is shown with a motor housing 52 which is provided with a handle 54 which carries a button 56 of an electrical on and off switch. At its lower end, the orbital sander 50 carries a sanding plate 58 with an elastic cushion 60, which is provided with a gas-tight skin 62 and with a filling 64 is filled from elastic granules. The working surface 66 of the elastic pad 60 carries an abrasive sheet 68 and is concavely curved as an imprint of a convex workpiece with a radius of curvature R. The abrasive sheet 68 adapts to the concave shape of the working surface 66 and can thus be rotated about its vertical axis when the abrasive disc 58 is rotated. For example, in the direction of arrow 69, machine a workpiece surface that is convexly curved with radius R over a large area.
Das elastische Kissen 60 trägt auf seiner Oberseite ein Ven¬ til 70, das mit einer Ventilabdeckkappe 72 staubdicht ver¬ schließbar ist.The elastic cushion 60 carries on its upper side a valve 70 which can be closed in a dust-tight manner with a valve cover cap 72.
Der in Figur 4 gezeigte Handbandschleifer 80 besteht aus ei- nem Gehäuse 82 mit einem Handgriff 84. Der Handgriff 84 trägt eine Taste 86 eines nicht dargestellten elektrischen An- und Ausschalters. Der Handbandschleifer 80 trägt zwei achsparallele Rollen 88, 90 mit einem umlaufenden Schleif- band 92. Zwischen den Rollen 88, 90 befindet sich eine An- druckplatte 94, die die Unterseite eines elastischen Kissens ist, das mit einer Füllung 96 versehen ist, die aus elasti¬ schem Granulat besteht. An seiner Oberseite trägt die An¬ druckplatte 94 ein Ventil 98 mit einer Abdeckkappe 100. Ebenso trägt die Rolle 90 eine hohlzylindrische, kissen- artige Ummantelung 102.The hand-held belt sander 80 shown in FIG. 4 consists of a housing 82 with a handle 84. The handle 84 carries a key 86 of an electrical on and off switch, not shown. The hand belt sander 80 carries two axially parallel rollers 88, 90 with a circumferential grinding belt 92. Between the rollers 88, 90 there is a pressure plate 94, which is the underside of an elastic cushion which is provided with a filling 96 which is made of elastic granules exist. On its upper side, the pressure plate 94 carries a valve 98 with a cover cap 100. The roller 90 also carries a hollow cylindrical, pillow-like casing 102.
Die Ummantelung 102 ist mit einer Füllung 103 aus elasti¬ schem Granulat versehen. An seinem axial äußeren Ende trägt die Rolle 90 ein Ventil 104, das mit einer nicht dargestell- ten Abdeckkappe verschließbar ist.The casing 102 is provided with a filling 103 made of elastic granules. At its axially outer end, the roller 90 carries a valve 104 which can be closed with a cover cap (not shown).
In Figur 5 ist ein Querschnitt durch die Andruckplatte 94 gezeigt, wobei deren konkaves Profil 95 mit dem Radius R er¬ kennbar ist. Diesem Profil 95 Form paßt sich das Schleifband 92 mit seiner Krümmung 93 ohne weiteres an. Wird der Handbandschleifer 80 über ein Rohr geführt, das konvex mit dem Radius R gekrümmt ist, so ist dieses beson¬ ders wirksam und schnell großflächig abschleifbar. Hierbei liegt zwischen dem Schleifband 92 und dem gekrümmten Werk- stück eine großflächige Berührung vor und nicht wie bei ebe¬ nen Handbandschleifern eine Linienberührung.FIG. 5 shows a cross section through the pressure plate 94, the concave profile 95 of which can be seen with the radius R. The grinding belt 92 adapts to this profile 95 shape with its curvature 93 without further ado. If the hand belt sander 80 is guided over a tube which is convexly curved with the radius R, this is particularly effective and can be sanded over a large area quickly. Here there is a large-area contact between the sanding belt 92 and the curved workpiece and not a line contact as in the case of flat hand-belt sanders.
Bei einem nicht dargestellten Ausführungsbeispiel einer Handschleifmaschine ist ein elastisches Kissen luftballon- artig aufgeblasen und mit Granulat gefüllt. Durch Ablassen des Überdrucks aus diesem Kissen wird das Granulat durch die Gestaltelastizität des Kissens zusammengepreßt. Hier ist nur ein geringer Unterdruck nötig, um mittels des Kissens Ab¬ drücke von zu bearbeitenden Werkstückoberflächen anzuferti- gen.In an exemplary embodiment of a hand grinder, not shown, an elastic cushion is inflated like a balloon and filled with granules. By releasing the excess pressure from this cushion, the granulate is pressed together by the cushion's structural elasticity. Only a slight negative pressure is required here in order to make impressions of the workpiece surfaces to be machined by means of the cushion.
Als besonderer vorteilhaft für eine Formbeständigkeit des Kissens auch bei hohen auf das Kissen wirkenden Kräften wird die Verwendung von Granulat, dessen einzelne Granulatkörper eine hohe Rauhigkeit bzw. unrunde Flächen haben, die ein in¬ einander Verhaken der der Granulatkörper begünstigen. The use of granules, the individual granulate bodies of which have a high roughness or non-round surfaces, which promote interlocking of the granulate bodies, is particularly advantageous for a dimensional stability of the pillow even with high forces acting on the pillow.

Claims

Ansprüche Expectations
1. Handschleifmaschine (10; 50; 80) mit Werkzeug, bei dem zwischen einem Schleifmittel, insbesondere Schleifblatt, und einer Schleifplatte ein elastischen Kissen (30; 60; 94) an¬ geordnet ist, dadurch gekennzeichnet, daß das Kissen (30; 60; 94) durch einen leicht verformbaren sowie gasdicht ver- schließbaren und evakuierbaren Behälter gebildet wird, der zur Aufnahme einer Füllung (43; 64; 96; 103) aus Granulat oder dergleichen dient.1. Hand grinder (10; 50; 80) with a tool in which an elastic cushion (30; 60; 94) is arranged between an abrasive, in particular sanding sheet, and a grinding plate, characterized in that the cushion (30; 60 ; 94) is formed by an easily deformable and gas-tightly closable and evacuable container which serves to hold a filling (43; 64; 96; 103) made of granulate or the like.
2. Handschleifmaschine nach Anspruch 1, dadurch gekennzeich- net, daß das Kissen (30; 60; 94) volumenvariabel ist.2. Hand grinder according to claim 1, characterized in that the cushion (30; 60; 94) is variable in volume.
3. Handschleifmaschine nach Anspruch 1 oder 2, dadurch ge¬ kennzeichnet, daß der das Kissen (30; 60; 94) bildende Be¬ hälter ein Kunststoffbeutel ist, der, insbesondere mittels Ventil (36; 70; 98, 104), eine luftdicht verschließbare Einfüllδffnung für Granulat (43; 64; 96; 103) enthält.3. Hand grinder according to claim 1 or 2, characterized in that the cushion (30; 60; 94) forming the container is a plastic bag, which, in particular by means of a valve (36; 70; 98, 104), is airtight includes closable filling opening for granules (43; 64; 96; 103).
4. Handschleifmaschine nach Anspruch 3, dadurch gekennzeich¬ net, daß der Behälter mindestens eine elastische Fläche auf- weist, die, insbesondere ballonartig, aufblasbar ist.4. Hand grinder according to claim 3, characterized gekennzeich¬ net that the container has at least one elastic surface which, in particular balloon-like, is inflatable.
5. Handschleifmaschine nach Anspruch 4, dadurch gekennzeich¬ net, daß das Granulat (43; 64; 96; 103) eine plastisch ver¬ formbare Masse ist. 5. Hand grinder according to claim 4, characterized gekennzeich¬ net that the granules (43; 64; 96; 103) is a plastically deformable mass.
6. Handschleifmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß das Granulat (43; 64; 96; 103) aus geschäumtem, elastischem Kunststoff besteht.6. Hand grinder according to one of the preceding claims, characterized in that the granulate (43; 64; 96; 103) consists of foamed, elastic plastic.
7. Handschleifmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Behälter ein Ventil (36; 70; 98, 104) trägt, über das mit einer Unterdruckpumpe die im Behälter befindliche Luft evakuierbar iεt.7. Hand grinder according to one of the preceding claims, characterized in that the container carries a valve (36; 70; 98, 104) via which the air in the container can be evacuated with a vacuum pump.
8. Handschleifmaschine nach einem der vorhergehenden Ansprü¬ che, dadurch gekennzeichnet, daß sie unverlierbar eine Un¬ terdruckpumpe trägt.8. Hand grinder according to one of the preceding Ansprü¬ che, characterized in that it captively carries a vacuum pump.
9. Handschleifmaschine nach einem der vorhergehenden Ansprü- ehe, dadurch gekennzeichnet, daß sie als Schwingschleifer9. Hand grinder according to one of the preceding claims, characterized in that it is an orbital sander
(10) , Rotationsschleifer (50) oder Handbandschleifer (80) ausgestaltet ist.(10), rotary grinder (50) or hand-held belt grinder (80).
10. Schleifwerkzeug, insbesondere Schleifplatte (26), an dem ein Schleifmittel, vorzugsweise ein Schleifblatt (33; 68;10. grinding tool, in particular grinding plate (26) on which an abrasive, preferably an abrasive sheet (33; 68;
92) befestigbar ist, das sich gegen ein am Schleifwerkzeug angeordnetes elastisches Kissen (30; 60,- 94) abstützt, da¬ durch gekennzeichnet, daß das Kissen (30; 60; 94) als volu¬ menvariabler, leicht verformbarer Behälter ausgestaltet ist, der gasdicht verschließbar und evakuierbar ist und zur Auf¬ nahme einer Füllung (34; 64; 96, 103) aus Granulat oder dergl. dient. 92) can be fastened, which is supported against an elastic cushion (30; 60, - 94) arranged on the grinding tool, characterized in that the cushion (30; 60; 94) is designed as a volume-variable, easily deformable container, which can be closed and evacuated in a gastight manner and is used to hold a filling (34; 64; 96, 103) made of granules or the like.
EP96918586A 1995-07-01 1996-06-19 Manual grinding machine-tool and grinding tool Expired - Lifetime EP0836542B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19524084 1995-07-01
DE19524084A DE19524084A1 (en) 1995-07-01 1995-07-01 Hand grinding machine tool and grinding tool
PCT/DE1996/001080 WO1997002111A1 (en) 1995-07-01 1996-06-19 Manual grinding machine-tool and grinding tool

Publications (2)

Publication Number Publication Date
EP0836542A1 true EP0836542A1 (en) 1998-04-22
EP0836542B1 EP0836542B1 (en) 2000-10-18

Family

ID=7765811

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (6)

Country Link
US (1) US5931727A (en)
EP (1) EP0836542B1 (en)
JP (1) JPH11508494A (en)
CN (1) CN1116961C (en)
DE (2) DE19524084A1 (en)
WO (1) WO1997002111A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6599624B2 (en) 1999-12-15 2003-07-29 Tesa Ag Adhesive tape with thermally curable backing for masking a cathodic electrocoat primer

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044512A (en) * 1997-05-19 2000-04-04 Lake Country Manufacturing, Inc. Foam buffing pad and method of manufacture thereof
DE19820873A1 (en) * 1998-05-09 1999-11-11 Bosch Gmbh Robert Electric hand tool esp. for use in grinding and/or sanding
DE19848918A1 (en) * 1998-07-28 2000-02-10 Bernhard Ganser Grinding device for curved surfaces, with curved resting surface fixed to head by elastic element
DE10012243A1 (en) * 2000-03-14 2001-09-20 Bosch Gmbh Robert Electric hand grinding machine, especially eccentric grinder, has plate-shaped grinding material bearer attached to grinding plate by reversibly adhering surfaces
DE10065531A1 (en) * 2000-12-29 2002-07-11 Adrian Riegel Grinding machine has fluid fill contact pressure element formed by flexible hollow body with opposing surfaces interconnected through elastomer to adapt to surface conditions
US7381118B2 (en) * 2005-03-24 2008-06-03 Black & Decker Inc. Belt sander
US20070066186A1 (en) * 2005-09-22 2007-03-22 3M Innovative Properties Company Flexible abrasive article and methods of making and using the same
US7618306B2 (en) * 2005-09-22 2009-11-17 3M Innovative Properties Company Conformable abrasive articles and methods of making and using the same
EP2006048B1 (en) * 2007-06-22 2010-08-04 Metabowerke GmbH Grinding tool
DE102008055055B4 (en) 2008-12-22 2021-11-04 Robert Bosch Gmbh Hand machine tool with vibration-damped base plate
US20130333176A1 (en) * 2012-06-14 2013-12-19 Sean Anthony Macken Device and associated crack repair system
US10130229B2 (en) * 2013-03-28 2018-11-20 Yale Merret Smith Efficient surface treating machine
CN105999664A (en) * 2016-06-20 2016-10-12 烟台南山学院 Table tennis bat inverted-rubber sheet repairing device and repairing method thereof
CN112192397B (en) * 2020-10-12 2021-11-19 芜湖天锐捷精密电子设备有限公司 Polishing machine with handheld washing and polishing integrated function and using method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399578A (en) * 1981-08-21 1983-08-23 Bordeaux Willard A Tool for cleaning bathtub
US4510718A (en) * 1983-02-15 1985-04-16 Irving Loube Hull sanding device
FR2612823B1 (en) * 1987-03-27 1994-02-25 Essilor Internal Cie Gle Optique TOOL WITH SELF-CONFORMING PRESSURE ON THE SURFACE OF AN OPHTHALMIC LENS AND USABLE IN PARTICULAR AS AN APPLICATOR OR POLISHING PAD
US5672096A (en) * 1996-05-22 1997-09-30 R. P. Abrasives & Machine, Inc. Inflatable tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9702111A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6599624B2 (en) 1999-12-15 2003-07-29 Tesa Ag Adhesive tape with thermally curable backing for masking a cathodic electrocoat primer

Also Published As

Publication number Publication date
DE59606029D1 (en) 2000-11-23
WO1997002111A1 (en) 1997-01-23
JPH11508494A (en) 1999-07-27
EP0836542B1 (en) 2000-10-18
DE19524084A1 (en) 1997-01-02
CN1189794A (en) 1998-08-05
CN1116961C (en) 2003-08-06
US5931727A (en) 1999-08-03

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