EP1629942A2 - Belt grinding machine - Google Patents

Belt grinding machine Download PDF

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Publication number
EP1629942A2
EP1629942A2 EP05017662A EP05017662A EP1629942A2 EP 1629942 A2 EP1629942 A2 EP 1629942A2 EP 05017662 A EP05017662 A EP 05017662A EP 05017662 A EP05017662 A EP 05017662A EP 1629942 A2 EP1629942 A2 EP 1629942A2
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EP
European Patent Office
Prior art keywords
belt
tension roller
grinding machine
roller
machine according
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Granted
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EP05017662A
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German (de)
French (fr)
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EP1629942A3 (en
EP1629942B1 (en
Inventor
Jürgen Dipl.-Ing. Heesemann
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Individual
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Individual
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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories
    • B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt

Definitions

  • the invention relates to a belt grinding machine with a grinding belt which is endlessly guided over rollers, of which at least one drive roller is connected to a drive and of which at least one tensioning roller for exerting a bias on the grinding belt slidably mounted and can be pressed with a clamping device against the grinding belt ,
  • Sanding belts on belt sanding machines are usually guided over three rollers which form an isosceles triangle.
  • Two of the rollers are arranged at the same height next to a pressure bar, with which the grinding belt in the area between the two rollers can be pressed against the surface of the guided below the rollers and the pressure bar workpiece.
  • At least one of the two rollers is driven.
  • the rollers are driven on both sides of the pressure beam.
  • a third role Located above the pressure beam and is usually arranged symmetrically to the two lower rollers to form an isosceles triangle. The distance of the third roller to the two rollers is substantially greater than the distance between the two lower rollers, which is determined essentially by the width of the pressure beam.
  • the upper roller is formed in a known construction as a tensioning roller.
  • the tension roller is mounted and connected to a tensioning device that with the tension roller, the grinding belt is tensioned by the tension roller by means of the tensioning device against the grinding belt, in the construction described so up. If the pressure is kept constant by the tensioning device, a constant belt tension of the grinding belt arises even if the grinding belt lengthens during use.
  • the upper idler to pivot about a small angle from the parallelism to the other rollers to arrange the sanding belt during its circulation laterally, ie to move something in the longitudinal direction of the tensioner.
  • This ensures that the grinding belt is also guided with a sideways movement over the surface of the workpiece.
  • the pivoting of the tensioner is oscillating.
  • the tension roller is provided with an oscillating pivoting drive, which preferably acts on at least one end of the tensioning roller. If the tensioning device is formed by the piston of a hydraulic cylinder in this case, the piston must be rotatable within the cylinder.
  • the present invention is therefore based on the object, a belt sander in such a way that the required belt tension can be realized with a small footprint and any desired pivoting of the tension roller allows.
  • the clamping device has at least one with a flexible, variable in its axial length cylindrical shell and connected via a rigid face plate with the tension roller air spring and a leading guide displacement.
  • the guide is possible without any problems by a guide pin mounted in a bush, without causing any sealing problems.
  • the adjustment of the tensioning device by means of at least one air spring, wherein in a preferred embodiment, at least two air springs are used, which are arranged symmetrically to the guide means provided between them.
  • the air springs used according to the invention for the tensioning device allow the required adjustment of the regularly arranged parallel to the other rollers tensioner with a small footprint in height, ie in the adjustment, in which the parallelism is maintained.
  • the air springs allow due to the flexibility of the bellows unproblematic pivoting of the tension roller out of parallelism to the other roles, wherein preferably the guide means forms the pivot axis. If the air springs are arranged directly next to the guide device, you can easily join the necessary for the required pivoting angle of a few degrees deformations due to their flexibility by means of bellows. Special constructions to enable the pivoting movement can therefore be omitted.
  • the air springs on a rolling on a core rolling bellows are less prone to wear compared to air springs with bellows and allow the possibly required deformation while still high stability of the air spring.
  • the tension roller of the pressure belt can be provided in the same way with a tensioning device of at least one air spring and a guide device.
  • FIG. 1 shows a broadband grinding machine which can be fastened to a machine frame 1 on a transport track for workpieces. Accordingly, two lower rollers 2 are mounted in the machine frame 1, which are located on both sides of a (not shown here) pressure bar 3. The two lower rollers 2 are driven by a belt drive 4 by a motor 5 fixed to the machine frame.
  • another roller 6 is mounted as a tension roller.
  • the tension roller 6 forms with the two, parallel to the tension roller drive rollers 2 an isosceles triangle with respect to the base, so the distance between the two drive rollers 2, substantially larger catheters.
  • the tension roller 6 is displaceable upwards with a tensioning device 7.
  • the tension roller 6 is mounted with lateral axle extensions 8 in lateral tabs 9, which are fastened on a carrier plate 10 extending over the length of the tension roller 6.
  • the support plate 10 is adjusted by the tensioning device 7 in height.
  • the tensioning device 7 has in its essential structure two air springs 11, which are arranged on both sides of a guide device 12 with respect to the longitudinal direction of the tension roller 6.
  • the guide device 12 is connected in the middle of the tension roller 6 with the support plate 10.
  • tension roller 13 which is also adjustable in height with a corresponding tensioning device 14 and is provided for guiding a (not shown) pressure belt in the form of a lamella pressure belt.
  • the pressure belt is also guided over the drive rollers 2 so that it lies between the rollers 2 and the sanding belt.
  • the tension of the pressure belt is effected by acting on the tension roller 13 tensioning device 14.
  • clamping devices 7, 14 formed in the same way is shown in more detail in FIGS. 2 and 3.
  • the clamping devices 7, 14 are mounted by means of a bracket 15 on a machine frame and have a base plate 16 on which the air springs 11 and a guide block 17 of the guide means 7 are mounted.
  • the guide block 17 forms a round guide bushing for a corresponding round guide pin 18 which is fixed to an upper plate 19.
  • mounting pieces 20 are attached, with which the connection to the support plate 10 of the tension roller 6 is made.
  • FIG. 3 illustrates that the air springs 11 each consist of a cylinder 21 fastened to the plate 16, to the upper end of which a flexible rolling bellows 22 is fixed, which is sealed at the upper end and connected to a rigid end plate 23.
  • the end plate 23 is screwed to the plate 19.
  • Several dashed positions show the adjustability the air springs 11 by means of an air pressure which can be introduced via angle connectors 24 in the interior of the air springs 11.
  • the guide block 17 has threaded holes 28 so that it can be fastened to the plate 16 with screws screwed into the threaded holes 28.
  • a screw 25 is screwed from its free end frontally, the head serves as a stop for the movement of the guide pin 18 and prevents the guide pin 18 is lifted out of the guide block 17.
  • the air springs 11 of the clamping device 7, 14 allow a large displacement, but even have a small footprint in height.
  • each of the leadership of the abrasive belt causing rollers 2, 6 act, although the designated here as a tension roller upper roller 6 is preferably used as a tension roller.
  • the at least one driven roller (drive roller 2) may be any of the 3 rollers, including the tension roller 6, which could thus simultaneously act as a drive roller 2. However, preferred is the embodiment shown in the drawing.

Abstract

The belt grinding machine has a belt on two rollers (2, 6), of which one (2) is connected to a drive (4, 5), while the other (6) can be moved to exert a variable tension on the grinding belt. It can be pressed against the belt by a tensioning device (7), which has at least one guide device (12). This guide device has a flexible variable-length cylindrical jacket, and an air spring (11) connected via a rigid end plate to the tensioning roller.

Description

Die Erfindung betrifft eine Bandschleifmaschine mit einem Schleifband, das endlos über Rollen geführt ist, von denen wenigstens eine Antriebsrolle mit einem Antrieb verbunden ist und von denen wenigstens eine Spannrolle zur Ausübung einer Vorspannung auf das Schleifband verschiebbar gelagert und mit einer Spannvorrichtung gegen das Schleifband drückbar ist.The invention relates to a belt grinding machine with a grinding belt which is endlessly guided over rollers, of which at least one drive roller is connected to a drive and of which at least one tensioning roller for exerting a bias on the grinding belt slidably mounted and can be pressed with a clamping device against the grinding belt ,

Schleifbänder an Bandschleifmaschinen, insbesondere Breitbänder, werden üblicherweise über drei Rollen geführt, die ein gleichschenkliges Dreieck bilden. Zwei der Rollen sind auf gleicher Höhe neben einem Druckbalken angeordnet, mit dem das Schleifband im Bereich zwischen den beiden Rollen gegen die Oberfläche des unterhalb der Rollen und des Druckbalkens geführten Werkstücks drückbar ist. Wenigstens eine der beiden Rollen ist angetrieben. Vorzugsweise sind die Rollen auf beiden Seiten des Druckbalkens angetrieben. Eine dritte Rolle befindet sich oberhalb des Druckbalkens und ist meist symmetrisch zu den beiden unteren Rollen angeordnet, um ein gleichschenkliges Dreieck zu bilden. Der Abstand der dritten Rolle zu den beiden Rollen ist wesentlich größer als der Abstand zwischen den beiden unteren Rollen, der im Wesentlichen durch die Breite des Druckbalkens bestimmt ist. Die obere Rolle wird in einer bekannten Konstruktion als Spannrolle ausgebildet. Hierzu ist die Spannrolle so gelagert und mit einer Spannvorrichtung verbunden, dass mit der Spannrolle das Schleifband gespannt wird, indem die Spannrolle mittels der Spannvorrichtung gegen das Schleifband, in der beschriebenen Konstruktion also nach oben, gedrückt wird. Wenn der Andruck durch die Spannvorrichtung konstant gehalten wird, entsteht eine konstante Bandspannung des Schleifbandes auch dann, wenn sich das Schleifband während des Gebrauchs längt.Sanding belts on belt sanding machines, in particular wide belts, are usually guided over three rollers which form an isosceles triangle. Two of the rollers are arranged at the same height next to a pressure bar, with which the grinding belt in the area between the two rollers can be pressed against the surface of the guided below the rollers and the pressure bar workpiece. At least one of the two rollers is driven. Preferably, the rollers are driven on both sides of the pressure beam. A third role Located above the pressure beam and is usually arranged symmetrically to the two lower rollers to form an isosceles triangle. The distance of the third roller to the two rollers is substantially greater than the distance between the two lower rollers, which is determined essentially by the width of the pressure beam. The upper roller is formed in a known construction as a tensioning roller. For this purpose, the tension roller is mounted and connected to a tensioning device that with the tension roller, the grinding belt is tensioned by the tension roller by means of the tensioning device against the grinding belt, in the construction described so up. If the pressure is kept constant by the tensioning device, a constant belt tension of the grinding belt arises even if the grinding belt lengthens during use.

Es ist ferner bekannt, bei einer Breitband-Schleifmaschine die obere Spannrolle um einen kleinen Winkel aus der Parallelität zu den anderen Rollen verschwenkbar anzuordnen, um das Schleifband während seines Umlaufs seitlich, d.h. in Längsrichtung der Spannrolle etwas zu verschieben. Dadurch wird erreicht, dass das Schleifband auch mit einer Seitwärtsbewegung über die Oberfläche des Werkstücks geführt wird. Damit diese Bewegung eine Hin- und Herbewegung ist, wird die Verschwenkung der Spannrolle oszillierend ausgeübt. Hierzu ist die Spannrolle mit einem oszillierenden Verschwenkantrieb versehen, der vorzugsweise an wenigstens einem Ende der Spannrolle angreift. Wenn die Spannvorrichtung in diesem Fall durch den Kolben eines Hydraulikzylinders gebildet ist, muss der Kolben innerhalb des Zylinders drehbar sein. Hierdurch entsteht eine erhebliche Belastung der Dichtung zwischen Hydraulikzylinder und Kolbenstange. Nachteilig ist ferner bei der Verwendung eines Hydraulikzylinders als Spannvorrichtung, dass dieser eine nicht unerhebliche Länge aufweisen muss. Wenn die Bandschleifmaschine mit einer zusätzlichen Führung für ein Drucklamellenband ausgestattet ist, das zwischen dem Schleifband und den unteren Rollen geführt wird, jedoch oberhalb des Druckbalkens mit einer eigenen Spannrolle versehen ist, entsteht ein erhebliches Platzproblem, wenn die Bandschleifmaschine eine, beispielsweise durch Transportmöglichkeiten, vorgegebene Maximalhöhe nicht überschreiten soll.It is also known, in a broadband grinding machine, the upper idler to pivot about a small angle from the parallelism to the other rollers to arrange the sanding belt during its circulation laterally, ie to move something in the longitudinal direction of the tensioner. This ensures that the grinding belt is also guided with a sideways movement over the surface of the workpiece. For this movement is a reciprocating motion, the pivoting of the tensioner is oscillating. For this purpose, the tension roller is provided with an oscillating pivoting drive, which preferably acts on at least one end of the tensioning roller. If the tensioning device is formed by the piston of a hydraulic cylinder in this case, the piston must be rotatable within the cylinder. This creates a significant load on the seal between the hydraulic cylinder and the piston rod. Another disadvantage is the use of a hydraulic cylinder as a clamping device that this must have a considerable length. If the belt sander is equipped with an additional guide for a pressure fins belt, which is guided between the sanding belt and the lower rollers, but provided above the pressure beam with its own tension roller is, creates a significant space problem when the belt grinder, for example, by transport, predetermined maximum height should not exceed.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Bandschleifmaschine so auszubilden, dass die benötigte Bandspannung mit einem geringen Platzbedarf realisierbar ist und eine etwaig gewünschte Verschwenkung der Spannrolle ermöglicht.The present invention is therefore based on the object, a belt sander in such a way that the required belt tension can be realized with a small footprint and any desired pivoting of the tension roller allows.

Diese Aufgabe wird erfindungsgemäß bei einer Bandschleifmaschine der eingangs erwähnten Art dadurch gelöst, dass die Spannvorrichtung wenigstens eine mit einem flexiblen, in seiner axialen Länge variablen zylindrischen Mantel versehene und über eine starre Stirnplatte mit der Spannrolle verbundene Luftfeder und eine die Verschiebung führende Führungseinrichtung aufweist.This object is achieved in a belt grinding machine of the type mentioned in that the clamping device has at least one with a flexible, variable in its axial length cylindrical shell and connected via a rigid face plate with the tension roller air spring and a leading guide displacement.

Bei der erfindungsgemäßen Bandschleifmaschine sind somit die Funktion "Führung" und "Verstellung" getrennt. Die Führung ist unproblematisch durch einen in einer Buchse gelagerten Führungsbolzen möglich, ohne dass dabei irgendwelche Dichtprobleme auftreten. Die Verstellung der Spannvorrichtung erfolgt mittels wenigstens einer Luftfeder, wobei in einer bevorzugten Ausführungsform wenigstens zwei Luftfedern verwendet werden, die symmetrisch zu der zwischen ihnen vorgesehenen Führungseinrichtung angeordnet sind.In the belt grinding machine according to the invention thus the function "guide" and "adjustment" are separated. The guide is possible without any problems by a guide pin mounted in a bush, without causing any sealing problems. The adjustment of the tensioning device by means of at least one air spring, wherein in a preferred embodiment, at least two air springs are used, which are arranged symmetrically to the guide means provided between them.

Die erfindungsgemäß für die Spannvorrichtung verwendeten Luftfedern ermöglichen die erforderliche Verstellung der regelmäßig parallel zu den anderen Rollen angeordneten Spannrolle mit einem geringen Platzbedarf in der Höhe, also in Verstellrichtung, in der die Parallelität erhalten bleibt. Darüber hinaus ermöglichen die Luftfedern aufgrund der Flexibilität der Federbälge unproblematisch die Verschwenkung der Spannrolle aus der Parallelität zu den anderen Rollen heraus, wobei vorzugsweise die Führungseinrichtung die Schwenkachse bildet. Sind die Luftfedern unmittelbar neben der Führungseinrichtung angeordnet, können Sie aufgrund ihrer Flexibilität die für die benötigten Schwenkwinkel von wenigen Winkelgraden erforderlichen Verformungen unproblematisch mittels der Federbälge mitmachen. Besondere Konstruktionen zur Ermöglichung der Verschwenkbewegung können daher entfallen.The air springs used according to the invention for the tensioning device allow the required adjustment of the regularly arranged parallel to the other rollers tensioner with a small footprint in height, ie in the adjustment, in which the parallelism is maintained. In addition, the air springs allow due to the flexibility of the bellows unproblematic pivoting of the tension roller out of parallelism to the other roles, wherein preferably the guide means forms the pivot axis. If the air springs are arranged directly next to the guide device, you can easily join the necessary for the required pivoting angle of a few degrees deformations due to their flexibility by means of bellows. Special constructions to enable the pivoting movement can therefore be omitted.

In einer besonders bevorzugten Ausführungsform weisen die Luftfedern einen auf einem Kern abrollenden Rollbalg auf. Derartige Luftfedern sind gegenüber Luftfedern mit Faltenbälgen weniger verschleißanfällig und ermöglichen die ggf. benötigte Verformung bei dennoch hoher Stabilität der Luftfeder.In a particularly preferred embodiment, the air springs on a rolling on a core rolling bellows. Such air springs are less prone to wear compared to air springs with bellows and allow the possibly required deformation while still high stability of the air spring.

Sofern die erfindungsgemäße Bandschleifmaschine ferner mit einer Führung für ein Andruckband, insbesondere ein Drucklamellenband, versehen ist, kann die Spannrolle des Andruckbands in der gleichen Weise mit einer Spannvorrichtung aus wenigstens einer Luftfeder und einer Führungseinrichtung versehen sein.If the belt grinding machine according to the invention is further provided with a guide for a pressure belt, in particular a pressure disk belt, the tension roller of the pressure belt can be provided in the same way with a tensioning device of at least one air spring and a guide device.

Die parallele Anordnung der Rollen für das umlaufende Schleifband ist üblich, aber nicht zwingend, da es auch möglich ist, den Geradelauf des Schleifbandes mit zwei spiegelsymmetrisch zueinander verschwenkten Rollen zu realisieren.The parallel arrangement of the rollers for the rotating abrasive belt is common, but not mandatory, since it is also possible to realize the Geradelauf the abrasive belt with two mirror-symmetrically pivoted roles.

Die Erfindung soll im Folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:

Figur 1
- eine perspektivische Darstellung eines schematischen Aufbaus einer Breitbandschleifmaschine gemäß einer Ausführungsform der Erfindung
Figur 2
- eine perspektivische Ansicht einer Spannvorrichtung einer Spannrolle
Figur 3
- eine detailliertere Seitenansicht der Spannvorrichtung gemäß Figur 2.
The invention will be explained in more detail below with reference to an embodiment shown in the drawing. Show it:
FIG. 1
a perspective view of a schematic structure of a wide-belt sanding machine according to an embodiment of the invention
FIG. 2
- A perspective view of a tensioning device of a tensioner
FIG. 3
- A more detailed side view of the clamping device of Figure 2.

Figur 1 zeigt eine Breitband-Schleifmaschine, die mit einem Maschinengestell 1 auf einer Transportbahn für Werkstücke befestigbar ist. Demgemäß sind im Maschinengestell 1 zwei untere Rollen 2 gelagert, die sich beiderseits eines (hier nicht näher dargestellten) Druckbalkens 3 befinden. Die beiden unteren Rollen 2 sind mit einem Riemenantrieb 4 durch einen am Maschinengestell befestigten Motor 5 angetrieben.FIG. 1 shows a broadband grinding machine which can be fastened to a machine frame 1 on a transport track for workpieces. Accordingly, two lower rollers 2 are mounted in the machine frame 1, which are located on both sides of a (not shown here) pressure bar 3. The two lower rollers 2 are driven by a belt drive 4 by a motor 5 fixed to the machine frame.

Am oberen Ende der Maschine ist eine weitere Rolle 6 als Spannrolle gelagert. Die Spannrolle 6 bildet mit den beiden, zur Spannrolle parallel ausgerichteten Antriebsrollen 2 ein gleichschenkliges Dreieck mit gegenüber der Basis, also dem Abstand zwischen den beiden Antriebsrollen 2, wesentlichen größeren Katheten. Die Spannrolle 6 ist mit einer Spannvorrichtung 7 nach oben verschiebbar. Hierzu ist die Spannrolle 6 mit seitlichen Achsansätzen 8 in seitlichen Laschen 9 gelagert, die auf einer sich über die Länge der Spannrolle 6 erstreckenden Trägerplatte 10 befestigt sind. Die Trägerplatte 10 wird von der Spannvorrichtung 7 in ihrer Höhe eingestellt.At the upper end of the machine, another roller 6 is mounted as a tension roller. The tension roller 6 forms with the two, parallel to the tension roller drive rollers 2 an isosceles triangle with respect to the base, so the distance between the two drive rollers 2, substantially larger catheters. The tension roller 6 is displaceable upwards with a tensioning device 7. For this purpose, the tension roller 6 is mounted with lateral axle extensions 8 in lateral tabs 9, which are fastened on a carrier plate 10 extending over the length of the tension roller 6. The support plate 10 is adjusted by the tensioning device 7 in height.

Die Spannvorrichtung 7 weist in ihrem wesentlichen Aufbau zwei Luftfedern 11 auf, die bezüglich der Längsrichtung der Spannrolle 6 beiderseits einer Führungseinrichtung 12 angeordnet sind. Die Führungseinrichtung 12 ist in der Mitte der Spannrolle 6 mit der Tragplatte 10 verbunden.The tensioning device 7 has in its essential structure two air springs 11, which are arranged on both sides of a guide device 12 with respect to the longitudinal direction of the tension roller 6. The guide device 12 is connected in the middle of the tension roller 6 with the support plate 10.

Unterhalb der Spannvorrichtung 7 ist eine weitere entsprechend gelagerte Spannrolle 13 erkennbar, die mit einer entsprechenden Spannvorrichtung 14 ebenfalls in der Höhe verstellbar ist und zur Führung eines (nicht dargestellten) Andruckbandes in Form eines Lamellen-Druckbandes vorgesehen ist. Das Andruckband wird ebenfalls über die Antriebsrollen 2 so geführt, dass es zwischen den Rollen 2 und dem Schleifband liegt. Die Spannung des Andruckbandes wird durch die auf die Spannrolle 13 wirkende Spannvorrichtung 14 bewirkt.Below the tensioning device 7, a further correspondingly mounted tension roller 13 can be seen, which is also adjustable in height with a corresponding tensioning device 14 and is provided for guiding a (not shown) pressure belt in the form of a lamella pressure belt. The pressure belt is also guided over the drive rollers 2 so that it lies between the rollers 2 and the sanding belt. The tension of the pressure belt is effected by acting on the tension roller 13 tensioning device 14.

Der Aufbau der in gleicher Weise ausgebildeten Spannvorrichtungen 7, 14 ergibt sich näher aus den Figuren 2 und 3.The structure of the clamping devices 7, 14 formed in the same way is shown in more detail in FIGS. 2 and 3.

Die Spannvorrichtungen 7, 14 werden mittels einer Konsole 15 auf einem Maschinenträger montiert und weisen eine Grundplatte 16 auf, auf der die Luftfedern 11 und ein Führungsblock 17 der Führungseinrichtung 7 montiert sind. Der Führungsblock 17 bildet eine runde Führungsbuchse für einen entsprechenden runden Führungsbolzen 18, der an einer oberen Platte 19 befestigt ist. Auf der Oberseite der Platte 19 sind Befestigungsstücke 20 angebracht, mit denen die Verbindung zu der Tragplatte 10 der Spannrolle 6 hergestellt wird.The clamping devices 7, 14 are mounted by means of a bracket 15 on a machine frame and have a base plate 16 on which the air springs 11 and a guide block 17 of the guide means 7 are mounted. The guide block 17 forms a round guide bushing for a corresponding round guide pin 18 which is fixed to an upper plate 19. On the top of the plate 19 mounting pieces 20 are attached, with which the connection to the support plate 10 of the tension roller 6 is made.

Figur 3 verdeutlicht, dass die Luftfedern 11 aus jeweils einem auf der Platte 16 befestigten Zylinder 21 bestehen, an dessen oberen Ende ein flexibler Rollbalg als Mantel 22 befestigt ist, der am oberen Ende abgedichtet und mit einer starren Stirnplatte 23 verbunden ist. Die Stirnplatte 23 ist an die Platte 19 angeschraubt. Mehrere strichliert eingezeichnete Stellungen zeigen die Verstellbarkeit der Luftfedern 11 mittels eines Luftdrucks, der über Winkel-Anschlussstücke 24 in das Innere der Luftfedern 11 einbringbar ist.FIG. 3 illustrates that the air springs 11 each consist of a cylinder 21 fastened to the plate 16, to the upper end of which a flexible rolling bellows 22 is fixed, which is sealed at the upper end and connected to a rigid end plate 23. The end plate 23 is screwed to the plate 19. Several dashed positions show the adjustability the air springs 11 by means of an air pressure which can be introduced via angle connectors 24 in the interior of the air springs 11.

Der Führungsblock 17 weist Gewindelöcher 28 auf, sodass er mit in die Gewindelöcher 28 eingeschraubten Schrauben an der Platte 16 befestigbar ist. Die Befestigung des Führungsbolzen 18 an der Platte 19 erfolgt mittels eines U-förmigen Lagerstücks 26 und eines Verriegelungsbolzens 27, der eine bezüglich der Hochachse drehfeste und bezüglich seiner horizontalen Längsachse schwenkbare Verbindung mit dem Führungsbolzen 18 herstellt. In den Führungsbolzen 18 ist von seinem freien Ende her stirnseitig eine Schraube 25 eingeschraubt, deren Kopf als Anschlag für die Bewegung des Führungsbolzens 18 dient und verhindert, dass der Führungsbolzen 18 aus dem Führungsblock 17 herausgehoben wird.The guide block 17 has threaded holes 28 so that it can be fastened to the plate 16 with screws screwed into the threaded holes 28. The attachment of the guide pin 18 to the plate 19 by means of a U-shaped bearing piece 26 and a locking bolt 27 which produces a relative to the vertical axis rotationally fixed and pivotable with respect to its horizontal longitudinal axis connection with the guide pin 18. In the guide pin 18, a screw 25 is screwed from its free end frontally, the head serves as a stop for the movement of the guide pin 18 and prevents the guide pin 18 is lifted out of the guide block 17.

Es ist erkennbar, dass die Luftfedern 11 der Spannvorrichtung 7, 14 einen großen Verstellweg ermöglichen, selbst jedoch einen geringen Platzbedarf in der Höhe haben. Somit ist es ohne weiteres möglich, selbst bei der Ausbildung der Bandschleifmaschine mit einer Spannrolle 13 für ein Drucklamellenband eine Maximalhöhe der Maschine nicht zu überschreiten, sodass die Maschine im montierten Zustand im normalen Straßenverkehr transportierbar ist.It can be seen that the air springs 11 of the clamping device 7, 14 allow a large displacement, but even have a small footprint in height. Thus, it is readily possible not to exceed a maximum height of the machine even in the formation of the belt grinding machine with a tension roller 13 for a pressure plate belt, so that the machine is transported in the mounted state in normal traffic.

Als Spannrolle 6 kann jede der die Führung des Schleifbandes bewirkenden Rollen 2, 6 fungieren, obwohl die hier als Spannrolle bezeichnete obere Rolle 6 bevorzugt als Spannrolle eingesetzt wird. Die wenigstens eine angetriebene Rolle (Antriebsrolle 2) kann jede der 3 Rollen sein, also auch die Spannrolle 6, die somit gleichzeitig als Antriebsrolle 2 fungieren könnte. Bevorzugt ist jedoch die in der Zeichnung dargestellte Ausführungsform.As a tension roller 6, each of the leadership of the abrasive belt causing rollers 2, 6 act, although the designated here as a tension roller upper roller 6 is preferably used as a tension roller. The at least one driven roller (drive roller 2) may be any of the 3 rollers, including the tension roller 6, which could thus simultaneously act as a drive roller 2. However, preferred is the embodiment shown in the drawing.

Claims (9)

Bandschleifmaschine mit einem Schleifband, das endlos über Rollen (2, 6) geführt ist, von denen wenigstens eine Antriebsrolle (2) mit einem Antrieb (4, 5) verbunden ist und von denen wenigstens eine Spannrolle (6) zur Ausübung einer Vorspannung auf das Schleifband verschiebbar gelagert und mit einer Spannvorrichtung (7) gegen das Schleifband drückbar ist, dadurch gekennzeichnet, dass die Spannvorrichtung (7) wenigstens eine mit einem flexiblen, in seiner axialen Länge variablen zylindrischen Mantel (22) versehene und über eine starre Stirnplatte (23) mit der Spannrolle (6) verbundene Luftfeder (11) und eine die Verschiebung führende Führungseinrichtung (12) aufweist.Belt grinding machine with a grinding belt, which is endlessly guided over rollers (2, 6), of which at least one drive roller (2) is connected to a drive (4, 5) and of which at least one tension roller (6) for exerting a pretension on the Abrasive belt slidably mounted and with a clamping device (7) against the sanding belt can be pressed, characterized in that the clamping device (7) at least one with a flexible, variable in its axial length cylindrical shell (22) and a rigid end plate (23) Having the tension roller (6) connected to the air spring (11) and a leading guide displacement means (12). Bandschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Spannvorrichtung (7) zwei Luftfedern (11) aufweist, die symmetrisch zu der zwischen ihnen vorgesehenen Führungseinrichtung (12) angeordnet sind.Belt grinding machine according to claim 1, characterized in that the tensioning device (7) comprises two air springs (11), which are arranged symmetrically to the guide means (12) provided between them. Bandschleifmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Führungseinrichtung (12) als senkrecht zur Längsrichtung der Spannrolle (6) angeordnete Schwenkachse für die Spannrolle (6) ausgebildet ist.Belt grinding machine according to claim 1 or 2, characterized in that the guide device (12) is designed as a pivot axis arranged perpendicular to the longitudinal direction of the tensioning roller (6) for the tensioning roller (6). Bandschleifmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Spannrolle (6) mit einem oszillierenden Schwenkantrieb für das Verschwenken der Spannrolle (6) um einen kleinen Schwenkwinkel verbunden ist.Belt grinder according to one of claims 1 to 3, characterized in that the tension roller (6) is connected to an oscillating pivot drive for pivoting the tension roller (6) by a small pivot angle. Bandschleifmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die Verschwenkung der Spannrolle (6) um eine durch die Führungseinrichtung (12) gebildete Schwenkachse erfolgt.Belt grinding machine according to claim 4, characterized in that the pivoting of the tensioning roller (6) takes place about a pivot axis formed by the guide device (12). Bandschleifmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die wenigstens eine Luftfeder (11) einen auf einem Kern (Zylinder 21) abrollenden Rollbalg (22) aufweist.Belt grinder according to one of claims 1 to 5, characterized in that the at least one air spring (11) has a rolling on a core (cylinder 21) rolling bellows (22). Bandschleifmaschine nach einem der Ansprüche 1 bis 6, gekennzeichnet durch eine unterhalb der Spannrolle (6) angeordnete Spannrolle (13) für ein im Schleifbereich zwischen den Rollen (2) und dem Schleifband geführten Andruckband.Belt grinding machine according to one of claims 1 to 6, characterized by a below the tension roller (6) arranged tension roller (13) for a run in the grinding area between the rollers (2) and the grinding belt pressure belt. Bandschleifmaschine nach Anspruch 7, dadurch gekennzeichnet, dass das Andruckband ein Lamellenband ist.Belt grinding machine according to claim 7, characterized in that the pressure belt is a slat belt. Bandschleifmaschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Schleifband ein Breitband ist.Belt grinder according to one of claims 1 to 8, characterized in that the abrasive belt is a broadband.
EP05017662A 2004-08-25 2005-08-12 Belt grinding machine Active EP1629942B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004041364A DE102004041364A1 (en) 2004-08-25 2004-08-25 belt sander

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EP1629942A2 true EP1629942A2 (en) 2006-03-01
EP1629942A3 EP1629942A3 (en) 2006-06-07
EP1629942B1 EP1629942B1 (en) 2009-09-02

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EP05017662A Active EP1629942B1 (en) 2004-08-25 2005-08-12 Belt grinding machine

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EP (1) EP1629942B1 (en)
AT (1) ATE441500T1 (en)
DE (2) DE102004041364A1 (en)
ES (1) ES2330231T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2210705A2 (en) 2009-01-22 2010-07-28 Steinemann Technology AG Device for belt tensioning
CN107309750A (en) * 2017-06-09 2017-11-03 安徽机电职业技术学院 A kind of steel plate processes special grinding machine
CN115351670A (en) * 2022-10-20 2022-11-18 山东赛福特技术检测有限公司 Drum-type pressure vessel rust removal device and application method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187645A (en) 1978-07-26 1980-02-12 Timesavers, Inc. Reactive system for accommodating belt stretch and tracking

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138658B (en) * 1959-02-16 1962-10-25 Ernst Carstens Maschinenfabrik Device for regulating and controlling the running of sanding belts on belt sanding machines
US4021970A (en) * 1976-02-19 1977-05-10 Acme Mfg. Company Wide abrasive belt tension and oscillation assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187645A (en) 1978-07-26 1980-02-12 Timesavers, Inc. Reactive system for accommodating belt stretch and tracking

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2210705A2 (en) 2009-01-22 2010-07-28 Steinemann Technology AG Device for belt tensioning
CN107309750A (en) * 2017-06-09 2017-11-03 安徽机电职业技术学院 A kind of steel plate processes special grinding machine
CN115351670A (en) * 2022-10-20 2022-11-18 山东赛福特技术检测有限公司 Drum-type pressure vessel rust removal device and application method thereof
CN115351670B (en) * 2022-10-20 2023-03-10 山东赛福特技术检测有限公司 Drum-type pressure vessel rust removal device and application method thereof

Also Published As

Publication number Publication date
ES2330231T3 (en) 2009-12-07
DE502005008033D1 (en) 2009-10-15
DE102004041364A1 (en) 2006-03-02
EP1629942A3 (en) 2006-06-07
EP1629942B1 (en) 2009-09-02
ATE441500T1 (en) 2009-09-15

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