EP2199017B1 - Low oscillation machine concept - Google Patents

Low oscillation machine concept Download PDF

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Publication number
EP2199017B1
EP2199017B1 EP08171934A EP08171934A EP2199017B1 EP 2199017 B1 EP2199017 B1 EP 2199017B1 EP 08171934 A EP08171934 A EP 08171934A EP 08171934 A EP08171934 A EP 08171934A EP 2199017 B1 EP2199017 B1 EP 2199017B1
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EP
European Patent Office
Prior art keywords
grinding unit
machine
locking device
grinding
machine bed
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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.)
Not-in-force
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EP08171934A
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German (de)
French (fr)
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EP2199017A1 (en
Inventor
Martin Settele
Hans-Bernd Humpe
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Buetfering Schleiftechnik GmbH
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Buetfering Schleiftechnik GmbH
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Application filed by Buetfering Schleiftechnik GmbH filed Critical Buetfering Schleiftechnik GmbH
Priority to PL08171934T priority Critical patent/PL2199017T3/en
Priority to ES08171934T priority patent/ES2378172T3/en
Priority to EP08171934A priority patent/EP2199017B1/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
    • 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
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/007—Weight compensation; Temperature compensation; Vibration damping
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/06—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving conveyor belts, a sequence of travelling work-tables or the like

Definitions

  • the present invention relates to a grinding unit for processing substantially plate-shaped workpieces, the workpieces preferably at least partially made of wood, wood-based materials, plastic, metal or a combination thereof.
  • a grinding unit is used in particular in the refinement of workpiece surfaces of such workpieces.
  • EP 1 669 163 A1 a grinding unit, which has an endless grinding belt for machining workpieces.
  • a roller is rotatably mounted on the machine head, and is driven by a likewise mounted on the machine head drive means.
  • lifting means are provided for lifting the roller.
  • grinding machines according to this and further prior art have the disadvantage that the machine upper part is exposed to strong vibrations, which in turn influence the grinding result.
  • the surface structure of a workpiece to be machined thus depends inter alia also on vibrations of the grinding aggregate which result from the operating state of the aggregate.
  • US 6,089,958 A relates to a rotary abrasive machine wherein a grinding device is mounted on a vertically movable frame.
  • the abrasive is driven by an electric motor connected by a belt to the abrasive.
  • the present invention is thus also intended to ensure exact controllability of the processing result and the associated reproducibility.
  • the invention is based on the idea to design a grinding unit in such a way that vibrations of the machine head can be avoided or derived in a favorable manner.
  • the present invention provides a grinding unit, comprising: a machine bed having a workpiece support surface, a machine top communicating with the machine bed, the machine top being movable in a direction substantially perpendicular to the workpiece support surface, and drive means for driving an abrasive, in particular an electric motor.
  • the grinding unit according to the invention is characterized in that the drive means is fixed to the machine bed.
  • the drive means is in communication with the abrasive via a belt to drive the abrasive. In this way it can be ensured that the drive means is fixed to the machine bed, but at the same time can drive an abrasive located on the machine upper part.
  • a grinding unit according to the invention is characterized in that the belt is guided over an adjustable deflection roller, wherein the deflection roller can be adjusted in accordance with a movement of the machine upper part to ensure a sufficient belt tension. Consequently, according to this embodiment of the invention, a stepless adjustment of the machine head with respect to the machine bed can be carried out while the belt tension is always the same. Guiding the belt over a pulley is a relatively simple structural measure to achieve the objects of the present invention. Thus, a grinding unit according to this embodiment provides a variable system, which, however, can be realized structurally in a simple manner.
  • the vibrations of the drive means / the drive means can be derived directly into the machine bed.
  • the machine bed is commonly formed in a processing machine as the grinding unit according to the invention as a rigid body with high mass.
  • the attached to the machine base machine top is thus excited to a much lesser extent by the drive means than was the case with a directly attached to the machine head drive means. Consequently, the present grinding unit can reduce the vibrations of the machine head, which in turn has a positive effect on the machining result and its targeted influence.
  • the grinding unit according to the invention is characterized in that the movable machine head can be fixed by means of a locking device with respect to the machine bed.
  • the machine head can be selectively fixed at the time of machining on the machine bed, while the mobility of the machine head is ensured in a direction substantially perpendicular to the workpiece support surface direction to the machine bed after releasing the locking device.
  • the locking device can thus be controlled specifically and in accordance with the adjustment of the machine head and / or the grinding drive.
  • a system can be connected to the grinding unit, with which the respective workpiece thickness can be detected, and accordingly the adjustment of the machine head and the locking device can be controlled.
  • the abrasive means driven by the drive means is a circulating belt grinding means. With this larger areas of plate-shaped workpieces can be processed evenly in continuous operation.
  • the grinding unit according to the invention can be characterized in that the machine head is guided relative to the machine bed in a linear guide. Consequently, the stepless adjustability of the machine head relative to the machine bed in a vertical direction can be secured, and the machine head can be adjusted according to the workpiece thickness of the plate-shaped workpiece to be worked.
  • the grinding unit is characterized in that the workpiece support surface has a conveyor belt, which conveyor belt is guided over rollers fixed to the machine bed.
  • the grinding unit according to the invention is suitable for a continuous operation, so that high quantities can be processed.
  • a grinding unit may be characterized in that the locking device used is a pneumatic brake. This can then be controlled to determine the machine head with respect to the machine bed according to flexible and targeted, to exert a braking effect or in turn to solve them.
  • the locking device used is a pneumatic brake. This can then be controlled to determine the machine head with respect to the machine bed according to flexible and targeted, to exert a braking effect or in turn to solve them.
  • the locking device is attached to the machine bed and can be guided or detected along a guide element attached to the machine head.
  • the locking device can perform a locking movement in a plane parallel to the workpiece support surface.
  • the machine head can be moved with respect to the machine bed in a vertical direction, wherein the movement of the machine head is substantially perpendicular to the direction of the braking force of the locking device.
  • the locking device has a clamping device which is preferably guided in a groove provided on the guide element.
  • a clamping device which is preferably guided in a groove provided on the guide element.
  • the locking device may comprise a guide pin which is guided in a groove provided in the guide element. In this way, an additional guide for the relative movement between the machine head and machine bed is provided.
  • the grinding unit is characterized in that the machine bed consists at least in sections of a high-strength concrete and is preferably made in one piece.
  • Such a machine bed contributes in a special way to avoid vibrations of the machine head and is therefore particularly suitable for achieving the objectives of the present invention.
  • the machine bed can also be made of a cast material without departing from the basic idea of the present invention.
  • Fig. 1 shows an embodiment of a grinding unit 1 with two abrasive belts 21, 22 in a partially sectioned view.
  • the grinding unit 1 in this case has a machine bed 2, as well as a machine head 3 mounted in the vertical direction above.
  • the machine head 3 is movable relative to the machine bed 2 (indicated by arrows).
  • FIG. 1 schematically to recognize holes 42 per drive means 4, which extend in a vertical direction and in which screw connections, not shown, can be screwed to fix the drive means 4 on the machine bed 2.
  • the drive means 4 have an engine body 43 and a drive pulley 41, wherein the axes 44 of the drive pulleys 41 extend in a horizontal direction transversely to the feed direction of the workpieces to be machined explained in more detail later.
  • a belt 5 is wound, which is driven via the respective drive pulley 41.
  • two belts 5 are provided for driving the two abrasive belts 21, 22.
  • the belt 5 is further guided over the deflecting rollers 6a and 6b attached to the machine bed 2, and drives the machine upper part 4 mounted roller 8 and the rollers 8a and 8b.
  • the axes of rotation of all said rollers 6a, 6b, 8, 8a, 8b run in a substantially horizontal direction, and are aligned substantially parallel to the axis 44 of the corresponding drive pulley 44.
  • Fig. 1 the embodiment of a grinding machine with two abrasive belts 21, 22 is shown. These sanding belts 21, 22 are guided between the roller 8 driven by the belt 5 and the driven rollers 8a, 8b and a respective deflecting roller 32 arranged above it. All rollers for guiding the abrasive belts 21, 22 are attached to the machine head 3.
  • the belt 5 can always be kept in the tensioned state by adjusting the deflection roller 6a.
  • the storage of the adjustable guide roller 6a may be provided with a dynamometer to always ensure sufficient tension of the drive belt.
  • the described adjustability of the machine upper part 3 relative to the machine bed 2 is carried out by means of a mechanical adjusting device 9.
  • a mechanical adjusting device 9 Like the top view in Fig. 2 can be seen, four mechanical adjusting devices 9 are provided for adjusting the machine head 3. These are driven in each case via a connected to the machine bed 2 and arranged below this angle gear 9a.
  • the grinding unit 1 of the present embodiment a conveyor belt 10, which serves as a workpiece support surface.
  • the conveyor belt 10 is guided and driven at the entrance area or at the end area of the grinding unit 1 by means of rollers 10a, 10b. Through this structure, a continuous processing is possible.
  • the grinding unit 1 further comprises a total of four locking devices 7, two each on one side of the conveyor belt 10.
  • a locking device 7 is in Fig. 3 shown in a schematic side view.
  • the locking device 7 of the present embodiment a pneumatic brake, has a brake body 71 formed in the shape of a rectangular cube.
  • the machine head 3 along a vertically extending groove 32 relative to the attached to the machine bed 2 locking device 7 is movable.
  • the vertical groove 32 extends within a guide element 31 connected to the machine upper part 3.
  • at least one pin 72 is provided on the locking device 7 and is guided in the vertical groove 32.
  • the braking force is perpendicular to the illustrated drawing plane.
  • the grinding unit 1 can be operated as follows. By means of a measuring device, the thickness of a component is determined, and passed the detected value to a control unit. Subsequently, the machine head 3 is moved relative to the machine bed 2, so that the distance between the sanding belt / sanding belts and the conveyor belt 10 is adjusted according to the processing. Subsequently, the machine head 3 is firmly connected by means of the locking device 7 with the machine bed 2.
  • the workpiece to be machined is moved by means of the conveyor belt 10 after loading in the direction of the grinding belt / belts, and the processing is performed. Subsequently, the workpiece is again conveyed out of the processing area, and can be removed manually or mechanically at the end of the conveyor belt.
  • the locking device 7 is released so that the machine upper part 3 in turn can be moved relative to the machine bed 2.

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

Description

Die vorliegende Erfindung betrifft ein Schleifaggregat zur Bearbeitung von im Wesentlichen plattenförmigen Werkstücken, wobei die Werkstücke bevorzugt zumindest abschnittsweise aus Holz, Holzwerkstoffen, Kunststoff, Metall oder einer Kombination hiervon bestehen. Ein solches Schleifaggregat kommt im Besonderen bei der Veredelung von Werkstückoberflächen derartiger Werkstücke zum Einsatz.The present invention relates to a grinding unit for processing substantially plate-shaped workpieces, the workpieces preferably at least partially made of wood, wood-based materials, plastic, metal or a combination thereof. Such a grinding unit is used in particular in the refinement of workpiece surfaces of such workpieces.

Stand der TechnikState of the art

Im Stand der Technik sind eine Vielzahl von Schleifaggregaten bekannt, um plattenförmige Werkstücke der eingangs genannten Art bearbeiten zu können. Beispielsweise offenbart die europäische Patentanmeldung EP 1 669 163 A1 ein Schleifaggregat, welches zur Bearbeitung von Werkstücken ein Endlosschleifband aufweist. So ist eine Rolle am Maschinenoberteil drehbar gelagert, und wird von einem ebenfalls am Maschinenoberteil angebrachten Antriebsmittel angetrieben. Um das Schleifband während der Bearbeitung im eingespannten Zustand zu halten, sind Hebemittel zum Anheben der Rolle vorgesehen.In the prior art, a variety of grinding units are known to edit plate-shaped workpieces of the type mentioned above. For example, the European patent application discloses EP 1 669 163 A1 a grinding unit, which has an endless grinding belt for machining workpieces. Thus, a roller is rotatably mounted on the machine head, and is driven by a likewise mounted on the machine head drive means. In order to keep the grinding belt in the clamped state during machining, lifting means are provided for lifting the roller.

Allerdings haben Schleifmaschinen gemäß diesem und weiterem Stand der Technik den Nachteil, dass das Maschinenoberteil starken Schwingungen ausgesetzt ist, welche wiederum Einfluss auf das Schleifergebnis nehmen. Die Oberflächenstruktur eines zu bearbeitenden Werkstücks hängt somit unter anderem auch von Schwingungen des Schleifaggregats ab, welche sich aus dem Betriebszustand des Aggregats ergeben.However, grinding machines according to this and further prior art have the disadvantage that the machine upper part is exposed to strong vibrations, which in turn influence the grinding result. The surface structure of a workpiece to be machined thus depends inter alia also on vibrations of the grinding aggregate which result from the operating state of the aggregate.

US 6,089,958 A betrifft eine Schleifmaschine mit umlaufendem Schleifmittel, wobei eine Schleifvorrichtung an einem vertikal beweglichen Rahmen befestigt ist. Das Schleifmittel wird durch einen Elektromotor angetrieben, der mittels eines Riemens mit dem Schleifmittel in Verbindung steht. US 6,089,958 A relates to a rotary abrasive machine wherein a grinding device is mounted on a vertically movable frame. The abrasive is driven by an electric motor connected by a belt to the abrasive.

Gegenstand der ErfindungSubject of the invention

Es ist Ziel der vorliegenden Erfindung ein Schleifaggregat bereitzustellen, bei dem Schwingungen insbesondere des Maschinenoberteils auf ein Minimum reduziert werden, und somit das Bearbeitungsergebnis verbessert und/oder gezielter beeinflusst werden kann. Die vorliegende Erfindung soll somit auch eine exakte Steuerbarkeit des Bearbeitungsergebnisses sowie die damit verbundene Reproduzierbarkeit sicherstellen.It is the object of the present invention to provide a grinding unit in which vibrations, in particular of the machine head, are reduced to a minimum, and thus the machining result can be improved and / or influenced in a more targeted manner. The present invention is thus also intended to ensure exact controllability of the processing result and the associated reproducibility.

Der Erfindung liegt der Gedanke zugrunde, ein Schleifaggregat derart auszugestalten, dass Schwingungen des Maschinenoberteils vermieden bzw. günstig abgeleitet werden können.The invention is based on the idea to design a grinding unit in such a way that vibrations of the machine head can be avoided or derived in a favorable manner.

Das Ziel der vorliegenden Erfindung wird durch ein Schleifaggregat gemäß Anspruch 1 erreicht. Bevorzugte Ausführungsformen finden sich in den abhängigen Ansprüchen.The object of the present invention is achieved by a grinding unit according to claim 1. Preferred embodiments can be found in the dependent claims.

Demnach stellt die vorliegende Erfindung ein Schleifaggregat bereit, welches umfasst: ein Maschinenbett mit einer Werkstückauflagefläche, ein mit dem Maschinenbett in Verbindung stehendes Maschinenoberteil, wobei das Maschinenoberteil in einer zur Werkstückauflagefläche im Wesentlichen senkrechten Richtung beweglich ist, sowie ein Antriebsmittel zum Antreiben eines Schleifmittels, insbesondere eines Elektromotors. Das erfindungsgemäße Schleifaggregat zeichnet sich dadurch aus, dass das Antriebsmittel am Maschinenbett befestigt ist.Accordingly, the present invention provides a grinding unit, comprising: a machine bed having a workpiece support surface, a machine top communicating with the machine bed, the machine top being movable in a direction substantially perpendicular to the workpiece support surface, and drive means for driving an abrasive, in particular an electric motor. The grinding unit according to the invention is characterized in that the drive means is fixed to the machine bed.

Ferner ist das Antriebsmittel mit dem Schleifmittel über einen Riemen in Verbindung, um das Schleifmittel anzutreiben. Auf diese Weise kann sichergestellt werden, dass das Antriebsmittel am Maschinenbett befestigt ist, gleichzeitig jedoch ein am Maschinenoberteil befindliches Schleifmittel antreiben kann.Further, the drive means is in communication with the abrasive via a belt to drive the abrasive. In this way it can be ensured that the drive means is fixed to the machine bed, but at the same time can drive an abrasive located on the machine upper part.

Weiter zeichnet sich ein Schleifaggregat gemäß der Erfindung dadurch aus, dass der Riemen über eine verstellbare Umlenkrolle geführt wird, wobei die Umlenkrolle in Übereinstimmung mit einer Bewegung des Maschinenoberteils verstellt werden kann, um eine ausreichende Riemenspannung zu gewährleisten. Folglich kann gemäß dieser Ausführungsform der Erfindung ein stufenloses Verstellen des Maschinenoberteils hinsichtlich des Maschinenbetts bei stets gleichbleibender Riemenspannung durchgeführt werden. Das Führen des Riemens über eine Umlenkrolle ist eine relativ einfache bauliche Maßnahme, um die Ziele der vorliegenden Erfindung zu erreichen. Somit bietet ein Schleifaggregat gemäß dieser Ausführungsform ein variables System, welches konstruktiv jedoch auf einfache Weise zu realisieren ist.Further, a grinding unit according to the invention is characterized in that the belt is guided over an adjustable deflection roller, wherein the deflection roller can be adjusted in accordance with a movement of the machine upper part to ensure a sufficient belt tension. Consequently, according to this embodiment of the invention, a stepless adjustment of the machine head with respect to the machine bed can be carried out while the belt tension is always the same. Guiding the belt over a pulley is a relatively simple structural measure to achieve the objects of the present invention. Thus, a grinding unit according to this embodiment provides a variable system, which, however, can be realized structurally in a simple manner.

Dies hat gegenüber dem Stand der Technik den Vorteil, dass die Schwingungen des Antriebsmittels/der Antriebsmittel direkt in das Maschinenbett abgeleitet werden können. Das Maschinenbett ist bei einer Bearbeitungsmaschine wie dem erfindungsgemäßen Schleifaggregat gängigerweise als steifer Körper mit hoher Masse ausgebildet. Das am Maschinenbett befestigte Maschinenoberteil wird somit im weitaus geringeren Maße durch das Antriebsmittel angeregt als das bei einem direkt am Maschinenoberteil befestigten Antriebsmittel der Fall war. Folglich kann das vorliegende Schleifaggregat die Schwingungen des Maschinenoberteils reduzieren, was sich wiederum positiv auf das Bearbeitungsergebnis und dessen gezielte Beeinflussung auswirkt.This has the advantage over the prior art that the vibrations of the drive means / the drive means can be derived directly into the machine bed. The machine bed is commonly formed in a processing machine as the grinding unit according to the invention as a rigid body with high mass. The attached to the machine base machine top is thus excited to a much lesser extent by the drive means than was the case with a directly attached to the machine head drive means. Consequently, the present grinding unit can reduce the vibrations of the machine head, which in turn has a positive effect on the machining result and its targeted influence.

Weiter hat eine derartige Anordnung den Vorteil, dass das Antriebsmittel beim Verstellen des Maschinenoberteils relativ zum Maschinenbett nicht mit angehoben bzw. gesenkt werden muss. Hierdurch kann der Antrieb der Höhenverstellung des Maschinenoberteils einfacher und leichter ausgebildet werden. Darüber hinaus können Energiekosten beim vielfachen Heben und Senken des Maschinenoberteils eingespart werden, da dieses ohne das Antriebsmittel ein geringeres Gewicht aufweist.Next, such an arrangement has the advantage that the drive means when adjusting the machine head relative to the machine bed does not have to be raised or lowered. As a result, the drive of the height adjustment of the machine head can be made simpler and easier. In addition, energy costs can be saved in the multiple lifting and lowering of the machine head, as this without the drive means has a lower weight.

Gemäß einer weiteren bevorzugten Ausführungsform zeichnet sich das erfindungsgemäße Schleifaggregat dadurch aus, dass das bewegliche Maschinenoberteil mit Hilfe einer Feststellvorrichtung in Bezug auf das Maschinenbett fixiert werden kann. Somit lässt sich das Maschinenoberteil zum Zeitpunkt einer Bearbeitung am Maschinenbett gezielt fixieren, während nach Lösen der Feststellvorrichtung die Beweglichkeit des Maschinenoberteils in einer zur Werkstückauflagefläche im Wesentlichen senkrechten Richtung zum Maschinenbett sichergestellt ist. Die Feststellvorrichtung kann also gezielt und in Übereinstimmung mit der Verstellung des Maschinenoberteils und/ oder des Schleifantriebs angesteuert werden. Somit ist die Flexibilität des Schleifaggregats hinsichtlich unterschiedlicher Werkstückdicken gewährleistet. Auch kann ein System mit dem Schleifaggregat verbunden werden, mit dem die jeweilige Werkstückdicke erfasst werden kann, und dementsprechend die Verstellung des Maschinenoberteils und der Feststellvorrichtung angesteuert werden kann.According to a further preferred embodiment, the grinding unit according to the invention is characterized in that the movable machine head can be fixed by means of a locking device with respect to the machine bed. Thus, the machine head can be selectively fixed at the time of machining on the machine bed, while the mobility of the machine head is ensured in a direction substantially perpendicular to the workpiece support surface direction to the machine bed after releasing the locking device. The locking device can thus be controlled specifically and in accordance with the adjustment of the machine head and / or the grinding drive. Thus, the flexibility of the grinding unit is guaranteed with respect to different workpiece thicknesses. Also, a system can be connected to the grinding unit, with which the respective workpiece thickness can be detected, and accordingly the adjustment of the machine head and the locking device can be controlled.

Gemäß einer weiteren Ausführungsform des erfindungsgemäßen Schleifaggregats handelt es sich bei dem durch das Antriebsmittel angetriebene Schleifmittel um ein umlaufendes Bandschleifmittel. Mit diesem können größere Flächen von plattenförmigen Werkstücken im Durchlaufbetrieb gleichmäßig bearbeitet werden.According to a further embodiment of the grinding unit according to the invention, the abrasive means driven by the drive means is a circulating belt grinding means. With this larger areas of plate-shaped workpieces can be processed evenly in continuous operation.

Weiter kann sich das erfindungsgemäße Schleifaggregat dadurch auszeichnen, dass das Maschinenoberteil relativ zum Maschinenbett in einer linearen Führung geführt wird. Folglich kann die stufenlose Verstellbarkeit des Maschinenoberteils relativ zum Maschinenbett in einer senkrechten Richtung sichergestellt werden, und das Maschinenoberteil kann entsprechend der Werkstückdicke des zu bearbeitenden plattenförmigen Werkstücks angepasst werden.Next, the grinding unit according to the invention can be characterized in that the machine head is guided relative to the machine bed in a linear guide. Consequently, the stepless adjustability of the machine head relative to the machine bed in a vertical direction can be secured, and the machine head can be adjusted according to the workpiece thickness of the plate-shaped workpiece to be worked.

Gemäß einer weiteren Ausführungsform zeichnet sich das Schleifaggregat dadurch aus, dass die Werkstückauflagefläche ein Förderband aufweist, welches Förderband über am Maschinenbett befestigte Rollen geführt wird. Somit ist das erfindungsgemäße Schleifaggregat für einen Durchlaufbetrieb geeignet, so dass hohe Stückzahlen verarbeitet werden können.According to a further embodiment, the grinding unit is characterized in that the workpiece support surface has a conveyor belt, which conveyor belt is guided over rollers fixed to the machine bed. Thus, the grinding unit according to the invention is suitable for a continuous operation, so that high quantities can be processed.

Weiter kann sich ein Schleifaggregat dadurch kennzeichnen, dass die verwendete Feststellvorrichtung eine pneumatische Bremse ist. Diese kann dann zum Feststellen des Maschinenoberteils bezüglich des Maschinenbetts entsprechend flexibel und gezielt angesteuert werden, um eine Bremswirkung auszuüben oder diese wiederum zu lösen.Furthermore, a grinding unit may be characterized in that the locking device used is a pneumatic brake. This can then be controlled to determine the machine head with respect to the machine bed according to flexible and targeted, to exert a braking effect or in turn to solve them.

Gemäß einer weiteren Ausgestaltung ist die Feststellvorrichtung am Maschinenbett befestigt und kann entlang eines am Maschinenoberteil befestigten Führungselements geführt bzw. festgestellt werden.According to a further embodiment, the locking device is attached to the machine bed and can be guided or detected along a guide element attached to the machine head.

Weiter kann die Feststellvorrichtung eine Feststellbewegung in einer zur Werkstückauflagefläche parallelen Ebene durchführen. So kann das Maschinenoberteil bezüglich dem Maschinenbett in einer vertikalen Richtung bewegt werden, wobei die Bewegung des Maschinenoberteils im Wesentlichen senkrecht zur Richtung der Bremskraft der Feststellvorrichtung verläuft.Furthermore, the locking device can perform a locking movement in a plane parallel to the workpiece support surface. Thus, the machine head can be moved with respect to the machine bed in a vertical direction, wherein the movement of the machine head is substantially perpendicular to the direction of the braking force of the locking device.

Gemäß einer weiteren Ausführungsform weist die Feststellvorrichtung eine Klemmvorrichtung auf, welche bevorzugt in einer am Führungselement vorgesehenen Nut geführt wird. Somit wird zum einen eine zusätzliche Führung des Maschinenoberteils bei dessen Bewegung bereitgestellt, während die Feststellvorrichtung mittels der Klemmvorrichtung eine Feststellbewegung ausführt, um das Maschinenoberteil relativ zum Maschinenbett zu fixieren.According to a further embodiment, the locking device has a clamping device which is preferably guided in a groove provided on the guide element. Thus, on the one hand an additional guidance of the machine head is provided during its movement, while the locking device performs a locking movement by means of the clamping device in order to fix the machine head relative to the machine bed.

Weiter kann die Feststellvorrichtung einen Führungszapfen aufweisen, der in einer im Führungselement vorgesehenen Nut geführt wird. Auf diese Weise wird eine zusätzliche Führung für die relative Bewegung zwischen Maschinenoberteil und Maschinenbett bereitgestellt.Further, the locking device may comprise a guide pin which is guided in a groove provided in the guide element. In this way, an additional guide for the relative movement between the machine head and machine bed is provided.

Gemäß einer Ausführungsform der vorliegenden Erfindung zeichnet sich das Schleifaggregat dadurch aus, dass das Maschinenbett zumindest abschnittsweise aus einem hochfesten Beton besteht und bevorzugt einteilig ausgeführt ist. Ein derartiges Maschinenbett trägt in besonderer Weise zur Vermeidung von Schwingungen des Maschinenoberteils bei und ist zum Erreichen der Ziele der vorliegenden Erfindung deshalb besonders geeignet. Jedoch kann das Maschinenbett auch aus einem Gusswerkstoff hergestellt werden, ohne von der grundlegenden Idee der vorliegenden Erfindung abzuweichen.According to one embodiment of the present invention, the grinding unit is characterized in that the machine bed consists at least in sections of a high-strength concrete and is preferably made in one piece. Such a machine bed contributes in a special way to avoid vibrations of the machine head and is therefore particularly suitable for achieving the objectives of the present invention. However, the machine bed can also be made of a cast material without departing from the basic idea of the present invention.

Weiter ist ein Verfahren Gegenstand der vorliegenden Erfindung nach Anspruch 12. Die Vorteile des erfindungsgemäßen Verfahrens sind die gleichen wie die bereits zu den Vorrichtungsansprüchen erwähnten. So können beim Betrieb des Schleifaggregats unter anderem die Schwingungen direkt in das Maschinenbett abgeleitet werden, weshalb Schwingungen des Maschinenoberteils reduziert werden können.Further, a method is the subject of the present invention according to claim 12. The advantages of the method according to the invention are the same as those already mentioned in the device claims. Thus, during operation of the grinding unit, among other things, the vibrations can be discharged directly into the machine bed, which is why vibrations of the machine head can be reduced.

Detaillierte Beschreibung der bevorzugten AusführungsformDetailed Description of the Preferred Embodiment

Anhand der angehängten Zeichnungen wird nun eine bevorzugte Ausführungsform der vorliegenden Erfindung beispielhaft erläutert. Dabei ist:

Fig. 1
eine Seitenansicht des erfindungsgemäßen Schleifaggregats, wobei das Maschinenbett geschnitten dargestellt ist.
Fig. 2
eine Draufsicht des in Fig. 1 dargestellten Schleifaggregats,
Fig. 3
eine schematische Seitenansicht der Feststellvorrichtung, wobei das Maschinenbett geschnitten dargestellt ist.
A preferred embodiment of the present invention will now be described by way of example with reference to the accompanying drawings. Where:
Fig. 1
a side view of the grinding unit according to the invention, wherein the machine bed is shown in section.
Fig. 2
a top view of the in Fig. 1 illustrated grinding aggregate,
Fig. 3
a schematic side view of the locking device, wherein the machine bed is shown in section.

Fig. 1 zeigt eine Ausführungsform eines Schleifaggregats 1 mit zwei Schleifbändern 21, 22 in einer teilweise geschnittenen Ansicht. Das Schleifaggregat 1 weist dabei ein Maschinenbett 2, sowie ein in vertikaler Richtung darüber angebrachtes Maschinenoberteil 3 auf. Das Maschinenoberteil 3 ist relativ zum Maschinenbett 2 beweglich (durch Pfeile angedeutet). Fig. 1 shows an embodiment of a grinding unit 1 with two abrasive belts 21, 22 in a partially sectioned view. The grinding unit 1 in this case has a machine bed 2, as well as a machine head 3 mounted in the vertical direction above. The machine head 3 is movable relative to the machine bed 2 (indicated by arrows).

Innerhalb des Maschinenbetts 2, und mittels Schraubverbindungen mit diesen verbunden, sind zwei Antriebsmittel 4 zum Antreiben der Schleifbänder 21, 22 vorgesehen. Zur Anbringung der Antriebsmittel 4 am Maschinenbett 2 sind in Figur 1 schematisch Bohrungen 42 pro Antriebsmittel 4 zu erkennen, die sich in einer vertikalen Richtung erstrecken und in welche nicht dargestellte Schraubverbindungen eingeschraubt werden können, um die Antriebsmittel 4 am Maschinenbett 2 zu fixieren.Within the machine bed 2, and connected thereto by means of screw connections, two drive means 4 are provided for driving the grinding belts 21, 22. For attachment of the drive means 4 on the machine bed 2 are in FIG. 1 schematically to recognize holes 42 per drive means 4, which extend in a vertical direction and in which screw connections, not shown, can be screwed to fix the drive means 4 on the machine bed 2.

Die Antriebsmittel 4 weisen einen Motorkörper 43 und eine Antriebsscheibe 41 auf, wobei sich die Achsen 44 der Antriebsscheiben 41 in einer horizontalen Richtung quer zur später detaillierter erläuterten vorschubrichtung der zu bearbeitenden Werkstücke erstrecken.The drive means 4 have an engine body 43 and a drive pulley 41, wherein the axes 44 of the drive pulleys 41 extend in a horizontal direction transversely to the feed direction of the workpieces to be machined explained in more detail later.

Um jede der Antriebscheiben 41 ist ein Riemen 5 gewunden, der über die jeweilige Antriebsscheibe 41 angetrieben wird. Im vorliegenden Beispiel sind somit zwei Riemen 5 zum Antreiben der zwei Schleifbänder 21, 22 vorgesehen. Der Riemen 5 wird weiter über die am Maschinenbett 2 angebrachten Umlenkrollen 6a und 6b geführt, und treibt die am Maschinenoberteil 4 angebrachte Rolle 8 bzw. die Rollen 8a und 8b an. Die Drehachsen aller genannten Rollen 6a,6b, 8, 8a, 8b verlaufen dabei in einer im Wesentlichen horizontalen Richtung, und sind im Wesentlichen parallel zur Achse 44 der entsprechenden Antriebsscheibe 44 ausgerichtet.To each of the drive pulleys 41, a belt 5 is wound, which is driven via the respective drive pulley 41. Thus, in the present example, two belts 5 are provided for driving the two abrasive belts 21, 22. The belt 5 is further guided over the deflecting rollers 6a and 6b attached to the machine bed 2, and drives the machine upper part 4 mounted roller 8 and the rollers 8a and 8b. The axes of rotation of all said rollers 6a, 6b, 8, 8a, 8b run in a substantially horizontal direction, and are aligned substantially parallel to the axis 44 of the corresponding drive pulley 44.

In Fig. 1 ist die Ausführungsform einer Schleifmaschine mit zwei Schleifbändern 21, 22 gezeigt. Diese Schleifbänder 21, 22 werden zwischen der mittels des Riemens 5 angetriebenen Rolle 8 bzw. den angetriebenen Rollen 8a, 8b sowie einer jeweils darüber angeordneten Umlenkrolle 32 geführt. Alle Rollen zum Führen der Schleifbänder 21, 22 sind am Maschinenoberteil 3 angebracht.In Fig. 1 the embodiment of a grinding machine with two abrasive belts 21, 22 is shown. These sanding belts 21, 22 are guided between the roller 8 driven by the belt 5 and the driven rollers 8a, 8b and a respective deflecting roller 32 arranged above it. All rollers for guiding the abrasive belts 21, 22 are attached to the machine head 3.

Eine der im Maschinenbett 2 angebrachten Umlenkrollen, nämlich die Umlenkrolle mit dem Referenzzeichen 6a, ist in einer vertikalen Richtung relativ zum Maschinenbett 2 beweglich, während die andere der Umlenkrollen, nämlich diejenige mit dem Referenzzeichen 6b, gegenüber dem Maschinenbett 2 im Wesentlichen unbeweglich ist. Dadurch lässt sich bei Änderung der relativen Position der Umlenkrolle 8 bzw. der Umlenkrollen 8a und 8b beim Verstellen des Maschinenoberteils 3 relativ zum Maschinenbett 2 der Riemen 5 durch Verstellen der Umlenkrolle 6a stets im gespannten Zustand halten. Mit anderen Worten wird beim Vergrößern des Abstands der Umlenkrolle 8 bzw. der Umlenkrollen 8a und 8b relativ zum Maschinenbett 2 der Abstand zwischen den beiden weiteren Umlenkrollen 6a, 6b verkleinert, indem die oberhalb der Umlenkrolle 6b gelegene Umlenkrolle 6a noch unten bewegt wird. Auch kann die Lagerung der verstellbaren Umlenkrolle 6a mit einem Kraftmesser versehen sein, um eine ausreichende Spannung des Antriebsriemens stets sicher zu stellen.One of the deflecting rollers mounted in the machine bed 2, namely the deflecting roller with the reference mark 6a, is movable in a vertical direction relative to the machine bed 2, while the other of the deflecting rollers, namely the one with the reference sign 6b, is substantially immovable relative to the machine bed 2. As a result, when changing the relative position of the deflection roller 8 or the deflection rollers 8a and 8b during adjustment of the machine upper part 3 relative to the machine bed 2, the belt 5 can always be kept in the tensioned state by adjusting the deflection roller 6a. In other words, when increasing the distance between the deflection roller 8 and the deflection rollers 8a and 8b relative to the machine bed 2, the distance between the two further deflection rollers 6a, 6b is reduced by moving the deflection roller 6a located above the deflection roller 6b still lower. Also, the storage of the adjustable guide roller 6a may be provided with a dynamometer to always ensure sufficient tension of the drive belt.

Die beschriebene Verstellbarkeit des Maschinenoberteils 3 relativ zum Maschinenbett 2 wird mittels einer mechanischen Verstellvorrichtung 9 durchgeführt. Wie der Draufsicht in Fig. 2 zu entnehmen, sind zur Verstellung des Maschinenoberteils 3 insgesamt vier mechanische Verstellvorrichtungen 9 vorgesehen. Diese werden jeweils über ein mit dem Maschinenbett 2 verbundenes und unterhalb diesem angeordnetes Winkelgetriebe 9a angetrieben.The described adjustability of the machine upper part 3 relative to the machine bed 2 is carried out by means of a mechanical adjusting device 9. Like the top view in Fig. 2 can be seen, four mechanical adjusting devices 9 are provided for adjusting the machine head 3. These are driven in each case via a connected to the machine bed 2 and arranged below this angle gear 9a.

Weiter weist das Schleifaggregat 1 der vorliegenden Ausführungsform ein Förderband 10 auf, welches als Werkstückauflagefläche dient. Das Förderband 10 wird am Eingangsbereich bzw. am Endbereich des Schleifaggregats 1 mittels Rollen 10a, 10b geführt und angetrieben. Durch diesen Aufbau ist eine Durchlaufbearbeitung möglich.Further, the grinding unit 1 of the present embodiment, a conveyor belt 10, which serves as a workpiece support surface. The conveyor belt 10 is guided and driven at the entrance area or at the end area of the grinding unit 1 by means of rollers 10a, 10b. Through this structure, a continuous processing is possible.

Wie der Draufsicht von Fig. 2 zu entnehmen, weist das Schleifaggregat 1 weiter insgesamt vier Feststellvorrichtungen 7 auf, jeweils zwei auf einer Seite des Förderbandes 10. Eine solche Feststellvorrichtung 7 ist in Fig. 3 in einer schematischen Seitenansicht gezeigt. Die Feststellvorrichtung 7 der vorliegenden Ausführungsform, eine pneumatische Bremse, weist einen Bremsenkörper 71 auf, der in der Gestalt eines rechtwinkligen Würfels ausgebildet ist. Wie in Fig. 3 mit Hilfe des gestrichelten Pfeils angedeutet, ist das Maschinenoberteil 3 entlang einer vertikal verlaufenden Nut 32 gegenüber der am Maschinenbett 2 angebrachten Feststellvorrichtung 7 verfahrbar. Die vertikale Nut 32 verläuft innerhalb einem mit dem Maschinenoberteil 3 verbundnen Führungselement 31. Zur Führung ist an der Feststellvorrichtung 7 mindestens ein Stift 72 vorgesehen, der in der vertikalen Nut 32 geführt wird. In der vorliegenden Ausführungsform verläuft die Bremskraft senkrecht zur dargestellten zeichnungsebene.Like the top view of Fig. 2 can be seen, the grinding unit 1 further comprises a total of four locking devices 7, two each on one side of the conveyor belt 10. Such a locking device 7 is in Fig. 3 shown in a schematic side view. The locking device 7 of the present embodiment, a pneumatic brake, has a brake body 71 formed in the shape of a rectangular cube. As in Fig. 3 indicated by the dashed arrow, the machine head 3 along a vertically extending groove 32 relative to the attached to the machine bed 2 locking device 7 is movable. The vertical groove 32 extends within a guide element 31 connected to the machine upper part 3. For guidance, at least one pin 72 is provided on the locking device 7 and is guided in the vertical groove 32. In the present embodiment, the braking force is perpendicular to the illustrated drawing plane.

Bei der Bearbeitung von Werkstücken kann das Schleifaggregat 1 wie folgt betätigt werden. Mittels einer Messeinrichtung wird die Dicke eines Bauteils ermittelt, und der erfasste Wert an eine Steuereinheit weitergeleitet. Anschließend wird das Maschinenoberteil 3 relativ zum Maschinenbett 2 bewegt, damit der Abstand zwischen dem Schleifband/ den Schleifbändern und dem Förderband 10 entsprechend der Bearbeitung eingestellt wird. Nachfolgend wird das Maschinenoberteil 3 mittels der Feststellvorrichtung 7 fest mit dem Maschinenbett 2 verbunden.When machining workpieces, the grinding unit 1 can be operated as follows. By means of a measuring device, the thickness of a component is determined, and passed the detected value to a control unit. Subsequently, the machine head 3 is moved relative to the machine bed 2, so that the distance between the sanding belt / sanding belts and the conveyor belt 10 is adjusted according to the processing. Subsequently, the machine head 3 is firmly connected by means of the locking device 7 with the machine bed 2.

Das zu bearbeitende Werkstück wird mit Hilfe des Förderbandes 10 nach dem Beschicken in Richtung des Schleifbandes/ der Schleifbänder bewegt, und die Bearbeitung wird durchgeführt. Anschließend wird das Werkstück wieder aus dem Bearbeitungsbereich heraus gefördert, und kann am Ende des Förderbandes manuell oder maschinell entnommen werden.The workpiece to be machined is moved by means of the conveyor belt 10 after loading in the direction of the grinding belt / belts, and the processing is performed. Subsequently, the workpiece is again conveyed out of the processing area, and can be removed manually or mechanically at the end of the conveyor belt.

Wird eine neue Werkstückdicke erfasst, beispielsweise wenn eine neue Charge andersartiger Werkstücke bearbeitet werden soll, so wird die Feststellvorrichtung 7 gelöst, damit das das Maschinenoberteil 3 wiederum relativ zum Maschinenbett 2 bewegt werden kann.If a new workpiece thickness is detected, for example, when a new batch of different types of workpieces is to be processed, then the locking device 7 is released so that the machine upper part 3 in turn can be moved relative to the machine bed 2.

Claims (12)

  1. Grinding unit (1) for machining essentially panel-like workpieces which preferably consist at least in some sections of wood, derived timber products, plastic, metal or a combination thereof, which grinding unit (1) comprises:
    a machine bed (2) having a workpiece support surface (10), a machine upper part (3) connected to the machine bed (2), wherein the machine upper part (3) can be moved in a direction essentially vertical to the workpiece support surface (10), a drive means (4) in particular an electromotor, for driving a grinding means (21, 22) connected to the machine upper part (3), wherein the drive means (4) drives the grinding means (21, 22) via a belt (5), characterised in that the drive means (4) is attached to the machine bed (2), and in that the belt (5) is guided via an adjustable deflecting roller (6a), wherein the deflecting roller (6a) may be moved in accordance with a movement of the machine upper part (3) to guarantee adequate belt tension.
  2. Grinding unit (1) according to claim 1, characterised in that the machine upper part (3) may be fixed with respect to the machine bed (2) with the aid of a locking device (7).
  3. Grinding unit (1) according to claim 1 or 2, characterised in that the grinding means (21, 22) is a revolving belt grinding means.
  4. Grinding unit (1) according to one of the preceding claims, characterised in that the machine upper part (3) is guided relative to the machine bed (2) in a linear guide.
  5. Grinding unit (1) according to one of the preceding claims, characterised in that the workpiece support surface (10) has a conveyor belt, which conveyer belt is guided via rollers attached to the machine bed (2).
  6. Grinding unit (1) according to one of the preceding claims, characterised in that the locking device (7) has a pneumatic brake.
  7. Grinding unit (1) according to one of the preceding claims, characterised in that the locking device (7) is attached to the machine bed (2) and may be guided or locked along a guide element (31) attached to the machine upper part (3).
  8. Grinding unit (1) according to one of the preceding claims, characterised in that the locking device (7) carries out a locking movement in a plane which is parallel to the workpiece support surface (10).
  9. Grinding unit (1) according to claim 7 or 8, characterised in that the locking device (7) has a clamping device which is preferably guided in a groove (32) provided on the guide element (31).
  10. Grinding unit (1) according to one of claims 7-9, characterised in that the locking device (7) has a guide pin (72) which is guided in a groove (32) provided in the guide element (31).
  11. Grinding unit (1) according to one of the preceding claims, characterised in that the machine bed (2) consists at least in some sections of a high-strength concrete and is preferably designed to be in one piece.
  12. Method for operating a grinding unit, wherein the grinding unit has the features according to claim 1, wherein the grinding unit has a locking device (7) for fixing the machine upper part (3); which method comprises the following steps:
    moving the machine upper part (3) in a vertical direction,
    fixing the machine upper part (3) during machining of one or more workpieces by means of the locking device (7),
    releasing the locking device (7) after the end of machining.
EP08171934A 2008-12-17 2008-12-17 Low oscillation machine concept Not-in-force EP2199017B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL08171934T PL2199017T3 (en) 2008-12-17 2008-12-17 Low oscillation machine concept
ES08171934T ES2378172T3 (en) 2008-12-17 2008-12-17 Low vibration machine concept
EP08171934A EP2199017B1 (en) 2008-12-17 2008-12-17 Low oscillation machine concept

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08171934A EP2199017B1 (en) 2008-12-17 2008-12-17 Low oscillation machine concept

Publications (2)

Publication Number Publication Date
EP2199017A1 EP2199017A1 (en) 2010-06-23
EP2199017B1 true EP2199017B1 (en) 2011-11-30

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EP08171934A Not-in-force EP2199017B1 (en) 2008-12-17 2008-12-17 Low oscillation machine concept

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EP (1) EP2199017B1 (en)
ES (1) ES2378172T3 (en)
PL (1) PL2199017T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107322402A (en) * 2017-08-31 2017-11-07 凯里市浪金科技有限责任公司 A kind of metal plate grinder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6089958A (en) * 1999-05-13 2000-07-18 Costa; Alessandro Belt sander with orbitally translated abrasive belt
ITRN20040063A1 (en) 2004-12-10 2005-03-10 Scm Group Spa METHOD AND MACHINE FOR SANDING WOOD PANELS

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EP2199017A1 (en) 2010-06-23
PL2199017T3 (en) 2012-04-30

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