EP0911118B1 - Vacuum clamping system - Google Patents

Vacuum clamping system Download PDF

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Publication number
EP0911118B1
EP0911118B1 EP98114648A EP98114648A EP0911118B1 EP 0911118 B1 EP0911118 B1 EP 0911118B1 EP 98114648 A EP98114648 A EP 98114648A EP 98114648 A EP98114648 A EP 98114648A EP 0911118 B1 EP0911118 B1 EP 0911118B1
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EP
European Patent Office
Prior art keywords
shut
vacuum
valve
suction device
support base
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EP98114648A
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German (de)
French (fr)
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EP0911118A1 (en
Inventor
Kurt Dr. Schmalz
Rolf Stockburger
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J Schmalz GmbH
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J Schmalz GmbH
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Priority to DE29823472U priority Critical patent/DE29823472U1/en
Publication of EP0911118A1 publication Critical patent/EP0911118A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005Vacuum work holders

Definitions

  • the invention relates to a vacuum clamping system, according to the generic term of independent claim 1 arising from the document DE 297 05 087 U is known.
  • clamping beams Known on which vacuum blocks are placed, which for Clamping the workpiece to be machined, for example Wooden panels or the like, serve. After putting on the Vacuum blocks on the clamping beams are attached to the Clamping bars sucked in so that they are fixed. This is done by putting one or more in a first Shut-off valves provided in the vacuum circuit are opened, over which one at the bottom of the vacuum block envisaged closed room with the first Vacuum circuit is connected. After hanging up the Work piece on the vacuum block is on a second Vacuum circuit creates a vacuum and thereby the Workpiece sucked in by the vacuum block.
  • the clamping bars are relative are complex because they have two vacuum circuits Need to become.
  • the clamping beams must be attached to the Vacuum block vacancies with two each Shutoff valves are provided so that the two Vacuum circles can be closed there.
  • the vacuum blocks on the clamping beam can only linearly that means to be moved in one direction, which is the Corresponds to the longitudinal direction of the clamping beam. In the transverse direction to do this, the clamping beams must be moved towards each other. If different workpieces are to be machined one after the other this can possibly at a considerable adjustment effort to lead.
  • the vacuum blocks usually cannot be rotated.
  • clamping tables on which the vacuum blocks are placed can be placed anywhere. This has the advantage that the location of the individual vacuum blocks exactly to the shape of the workpiece can be customized. In addition, changes in location are Vacuum block relatively easy.
  • the invention is therefore based on the object previously to eliminate the disadvantages described and / or To provide vacuum clamping system, which is relatively simple is constructed and allows more flexible handling.
  • the workpiece is clamped over the space which serves to clamp the vacuum block.
  • This invention The main advantage of the solution is that the tensioning of the Block suction and just to clamp the workpiece only vacuum circuit is required. So that is also Structure of the support base, for example a clamping beam, much easier than with systems with two Under pressure circuits.
  • the suction block in the invention Vacuum clamping system not in a certain orientation the support base is put on.
  • the vacuum block must always be placed so that the one Intake opening with the space for suction of the block suction device and the other suction opening with the connecting line to Spannraum communicates.
  • the vacuum block is rotated put on, if at all possible, this can be too Malfunction. Since the vacuum block only in one certain position or setup can be placed, are the possible applications in the known Clamping systems restricted.
  • Clamping system comes with a single suction opening in the Support base for both the vacuum block and the workpiece curious; excited. Therefore, the vacuum block can also do any desired Take position on the support base, because the space to Clamping the vacuum block with a suction opening Circulation basis communicated.
  • the seal of the shut-off valve is advantageous Block suction device wider than the width of the flow channels the shut-off valve. In this way, leaks are avoided only partially covered by the vacuum block Shut-off valves, which lead to malfunctions, that is defective Suction of the vacuum block could result. Becomes the vacuum block placed on the support base in such a way that the seal is seated on a shut-off valve, this is complete locked. If this shut-off valve is still operated, that means to be opened, then a flow through the Seal prevented. The shut-off valve is inside of the room and is partially covered by the seal, then the space for clamping the vacuum block is still reliable supplied with negative pressure. However, the shut-off valve protrudes partly outdoors and partly by the seal then the shut-off valve is not switched. Due to the wide seal, however, there is room for tension of the vacuum block does not have the shut-off valve with the Outside, that means connected to the environment.
  • the bottom of the vacuum block in the locked room has ferromagnetic element. That way already by placing the suction cup on the Support base that under the ferromagnetic element itself shut-off valves are open.
  • the ferromagnetic Element is within the boundary of the seal Space provided that all of those within that space themselves shut-off valves are opened.
  • the Vacuum block is modular and has interchangeable Tops for different workpiece sizes. This has the essential advantage that for certain workpieces, e.g. very narrow workpieces, workpieces with difficult surfaces to be fixed, not a special one Vacuum block must be provided, only the Vacuum block must be provided with a special attachment.
  • the support base can be a clamping beam or be a chuck table, the chuck table by several clamping modules that can be coupled to one another can be constructed. Because of the configuration according to the invention, the Vacuum block at any position on the clamping table be put on, there is no exact alignment of the Block vacuum needs.
  • a suitable machine program can, for example, the required number of vacuum blocks calculated and the optimal positions of the Vacuum block on the clamping table for clamping the workpiece be determined. These positions can be created using, for example a laser beam can be displayed on the clamping table, so that the vacuum blocks can be positioned there. On in this way, the workpieces can be held optimally, on the other hand are optimally supported so that vibrations are largely avoided when machining the workpieces.
  • the upper part is one with a total of 1 designated edition basis, in which a Shut-off valve 2 is arranged. Via this shut-off valve 2, which assumes its closed position in FIG. 1 becomes a Flow channel 3 opened or closed.
  • a Shut-off valve 2 Via this shut-off valve 2, which assumes its closed position in FIG. 1 becomes a Flow channel 3 opened or closed.
  • a total of 4 designated block suction over which a workpiece 5, for Example, a clamping plate or the like, sucked and can be held.
  • the vacuum block 4 has on his Bottom 6 a circumferential seal 7, which a space 8th demarcates. Within this space 8 is at the bottom 6 a plate 9 made of ferromagnetic material for Example a steel plate, screwed tight.
  • This plate 9 has a central opening 10, which with a Flow channel 11 is aligned.
  • a sieve 12 Immediately behind the opening 10 there is a sieve 12.
  • the seal 7 and the plate 9 are located on a
  • FIG. 2 shows the underside 6 of the lower part 13 of the Block suction device and in particular the plate 9, which means four Screws 34 is attached to the lower part 13. In the middle there is the central opening 10. Around the plate 9 all around the seal 7 is a certain Width B.
  • FIG. 3 shows a clamping table 42 as an embodiment of the Support base 1.
  • This clamping table 42 is used in the present Embodiment of three modules 43 to 45 constructed, the can be plugged together with their long sides.
  • the Modules have longitudinal flow channels 46 provided, into which the flow channels 3 open.
  • the End faces 47 of modules 43 to 45 are connected to a collecting module 48 connected via which all flow channels 46 can be supplied with negative pressure. That way you can Clamping tables 42 can be constructed with almost any size.
  • the flow channels 3 have a width b. Besides, is the greatest distance a between two adjacent shut-off valves 2 smaller than the smallest distance A opposite one another Seals 7 on the underside of the suction block 4 ( Figure 2). In this way it is ensured that when putting on a Block suction 4 on a clamping table 42 the room 8 on each Case over a shut-off valve 2, so that this is on can always be supplied with negative pressure.
  • Shut-off valve 2 can be an electromagnetic or laser beam actuable valve, a touch valve or a Flow valve, which e.g. also have a bypass can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Description

Die Erfindung betrifft ein Vakuumspannsystem, gemäß dem Oberbegriff des unabhängigen Anspruchs 1, das aus dem Dokument DE 297 05 087 U bekannt ist. The invention relates to a vacuum clamping system, according to the generic term of independent claim 1 arising from the document DE 297 05 087 U is known.

Insbesondere bei Holzbearbeitungsmaschinen sind Spannbalken bekannt, auf welche Blocksauger aufgesetzt werden, welche zum Spannen des zu bearbeitenden Werkstücks, zum Beispiel Holzplatten oder dergleichen, dienen. Nach dem Aufsetzen der Blocksauger auf die Spannbalken werden diese an den Spannbalken festgesaugt, so dass sie fixiert sind. Dies erfolgt dadurch, dass ein oder mehrere in einem ersten Unterdruckkreis vorgesehene Absperrventile geöffnet werden, über welche ein an der Unterseite des Blocksaugers vorgesehener abgeschlossener Raum mit dem ersten Unterdruckkreis verbunden wird. Nach dem Auflegen des Werkstücks auf die Blocksauger wird an einem zweiten Unterdruckkreis ein Unterdruck angelegt und dadurch das Werkstück vom Blocksauger angesaugt. Dies erfolgt dadurch, dass an der Oberseite des Blocksaugers ein Spannraum vorgesehen ist, welcher über eine durch den Blocksauger hindurchgehende Verbindungsleitung mit der Unterseite des Blocksaugers verbunden ist und aus dem dort vorgesehenen Raum zum Spannen des Blocksaugers am Spannbalken ausmündet. Diese Verbindungsleitung ist mit dem zweiten Unterdruckkreis verbunden. Zum Spannen des werkstücks wird zunächst der Blocksauger positioniert und dann das Werkstück gespannt. Diese Spannsysteme haben den wesentlichen Vorteil, dass die Blocksauger zentral gespannt und über die Blocksauger die Werkstücke zentral angesaugt werden können. Es bedarf also keiner Schlauchverbindung zu jedem einzelnen Blocksauger, die sich oftmals als störend auswirken. Das Werkstück kann also gelöst werden, ohne dass der Blocksauger gelöst wird.Especially in woodworking machines are clamping beams Known on which vacuum blocks are placed, which for Clamping the workpiece to be machined, for example Wooden panels or the like, serve. After putting on the Vacuum blocks on the clamping beams are attached to the Clamping bars sucked in so that they are fixed. This is done by putting one or more in a first Shut-off valves provided in the vacuum circuit are opened, over which one at the bottom of the vacuum block envisaged closed room with the first Vacuum circuit is connected. After hanging up the Work piece on the vacuum block is on a second Vacuum circuit creates a vacuum and thereby the Workpiece sucked in by the vacuum block. This is done by that at the top of the vacuum block a clamping area is provided, which is a through the vacuum block connecting line with the bottom of the Block suction is connected and from the room provided there for clamping the vacuum block opens on the clamping beam. This Connection line is with the second vacuum circuit connected. To clamp the workpiece, the Vacuum block positioned and then clamped the workpiece. These clamping systems have the main advantage that the Vacuum blocks centrally clamped and over the vacuum blocks Workpieces can be sucked in centrally. So it takes no hose connection to every single vacuum block that often have a disruptive effect. So the workpiece can be loosened without loosening the suction cup.

Es hat sich jedoch auch gezeigt, dass die Spannbalken relativ aufwendig sind, da sie mit zwei Unterdruckkreisen versehen werden müssen. Außerdem müssen die Spannbalken an den von Blocksaugern nicht belegten Stellen mit jeweils zwei Absperrventilen versehen sein, so dass die beiden Unterdruckkreise dort verschlossen werden können. Außerdem können die Blocksauger auf den Spannbalken nur linear, dass heißt in einer Richtung verschoben werden, welche der Längsrichtung des Spannbalkens entspricht. In Querrichtung hierzu müssen die Spannbalken zueinander verschoben werden. Sollen nacheinander unterschiedliche Werkstücke bearbeitet werden, so kann dies u.U. zu einem erheblichen Einstellaufwand führen. Außerdem können die Blocksauger in der Regel nicht gedreht werden.However, it has also been shown that the clamping bars are relative are complex because they have two vacuum circuits Need to become. In addition, the clamping beams must be attached to the Vacuum block vacancies with two each Shutoff valves are provided so that the two Vacuum circles can be closed there. Moreover the vacuum blocks on the clamping beam can only linearly that means to be moved in one direction, which is the Corresponds to the longitudinal direction of the clamping beam. In the transverse direction to do this, the clamping beams must be moved towards each other. If different workpieces are to be machined one after the other this can possibly at a considerable adjustment effort to lead. In addition, the vacuum blocks usually cannot be rotated.

Es sind auch Spanntische bekannt, auf welche die Blocksauger beliebig aufsetzbar sind. Dies hat den Vorteil, dass die Lage der einzelnen Blocksauger exakt an die Form des Werkstücks angepasst werden kann. Außerdem sind Lageveränderungen der Blocksauger relativ einfach möglich.There are also known clamping tables on which the vacuum blocks are placed can be placed anywhere. This has the advantage that the location of the individual vacuum blocks exactly to the shape of the workpiece can be customized. In addition, changes in location are Vacuum block relatively easy.

Als Nachteil wird bei diesen Spanntischen jedoch angesehen, dass die einzelnen Blocksauger über Schlauchleitungen mit dem Unterdruckversorgern verbunden werden müssen. Diese Schlauchleitungen wirken sich jedoch bei der Bearbeitung des Werkstücks als störend aus, da sie zum. einen neben den Blocksaugern auf dem Spanntisch liegen und vom Bearbeitungsabfall zugedeckt werden. Außerdem können derartige Schlauchleitungen sehr leicht beschädigt werden.However, the disadvantage of these clamping tables is that that the individual vacuum blocks via hose lines with the Vacuum suppliers must be connected. This Hose lines, however, affect the processing of the Workpiece as annoying, because they are. one next to the Block suction devices lie on the clamping table and from Processing waste will be covered. In addition, such Hose lines can be damaged very easily.

Der Erfindung liegt daher die Aufgabe zugrunde, die zuvor geschilderten Nachteile zu eliminieren und/oder ein Vakuumspannsystem bereitzustellen, welches relativ einfach aufgebaut ist und eine flexiblere Handhabung zulässt.The invention is therefore based on the object previously to eliminate the disadvantages described and / or To provide vacuum clamping system, which is relatively simple is constructed and allows more flexible handling.

Diese Aufgabe wird erfindungsgemäß durch ein Vakuumspannsystem gemäß Anspruch 1 gelöst.This object is achieved according to the invention solved by a vacuum clamping system according to claim 1.

Auf diese Weise ist sichergestellt, dass beim Aufsetzen des Blocksaugers auf die Auflagebasis der von der Dichtung umgrenzte Raum an der Unterseite des Blocksaugers auf jeden Fall auf einem Absperrventil aufsitzt, so dass dieser Raum mit Unterdruck versorgt werden kann.This ensures that when the Vacuum block on the support base of the seal bounded space at the bottom of the vacuum block on everyone Case is seated on a shut-off valve, so that this room with Vacuum can be supplied.

Das Spannen des Werkstücks erfolgt also über den Raum, welcher zum Spannen des Blocksaugers dient. Diese erfindungsgemäße Lösung hat den wesentlichen Vorteil, dass zum Spannen des Blocksaugers und zum Spannen des Werkstücks lediglich ein einziger Unterdruckkreis benötigt wird. Somit ist auch der Aufbau der Auflagebasis, zum Beispiel eines Spannbalkens, wesentlich einfacher als bei Systemen mit zwei Unterdruckkreisen.The workpiece is clamped over the space which serves to clamp the vacuum block. This invention The main advantage of the solution is that the tensioning of the Block suction and just to clamp the workpiece only vacuum circuit is required. So that is also Structure of the support base, for example a clamping beam, much easier than with systems with two Under pressure circuits.

Da lediglich ein einziger Unterdruckkreis benötigt wird, bedarf es auch lediglich eines Absperrventils für die Ansaugöffnungen der Auflagebasis, so dass die Anzahl der Absperrventile gegenüber bekannten Ausführungsformen halbiert ist. Außerdem muss der Blocksauger beim erfindungsgemäßen Vakuumspannsystem nicht in einer bestimmten Ausrichtung auf die Auflagebasis aufgesetzt werden. Beim Stand der Technik muss der Blocksauger stets so aufgesetzt werden, dass die eine Ansaugöffnung mit dem Raum zum Ansaugen des Blocksaugers und die andere Ansaugöffnung mit der Verbindungsleitung zum Spannraum kommuniziert. Wird der Blocksauger gedreht aufgesetzt, falls überhaupt möglich, kann dies zu Fehlfunktionen führen. Da der Blocksauger jedoch nur in einer bestimmten Position bzw. Aufstellung aufgesetzt werden kann, sind die Anwendungsmöglichkeiten bei den bekannten Spannsystemen eingeschränkt. Beim erfindungsgemäßen Spannsystem wird mit einer einzigen Ansaugöffnung in der Auflagebasis sowohl der Blocksauger als auch das Werkstück gespannt. Daher kann der Blocksauger auch jede gewünschte Position auf der Auflagebasis einnehmen, da der Raum zum Spannen des Blocksaugers mit einer Ansaugöffnung der Auflagebasis kommuniziert.Since only a single vacuum circuit is required, it only requires a shut-off valve for the Suction openings of the support base so that the number of Shut-off valves halved compared to known embodiments is. In addition, the suction block in the invention Vacuum clamping system not in a certain orientation the support base is put on. In the state of the art the vacuum block must always be placed so that the one Intake opening with the space for suction of the block suction device and the other suction opening with the connecting line to Spannraum communicates. The vacuum block is rotated put on, if at all possible, this can be too Malfunction. Since the vacuum block only in one certain position or setup can be placed, are the possible applications in the known Clamping systems restricted. In the invention Clamping system comes with a single suction opening in the Support base for both the vacuum block and the workpiece curious; excited. Therefore, the vacuum block can also do any desired Take position on the support base, because the space to Clamping the vacuum block with a suction opening Circulation basis communicated.

Vorteilhaft ist die das Absperrventil umgrenzende Dichtung des Blocksaugers breiter als die Breite der Strömungskanäle des Absperrventils. Auf diese Weise werden Leckagen vermieden durch lediglich teilweise vom Blocksauger überdeckte Absperrventile, was zu Fehlfunktionen, dass heißt mangelhaftes Ansaugen des Blocksaugers führen könnte. Wird der Blocksauger in der Art auf die Auflagebasis aufgesetzt, dass die Dichtung auf einem Absperrventil aufsitzt, so ist dieses vollständig verschlossen. Wird dieses Absperrventil dennoch betätigt, dass heißt geöffnet werden, dann wird ein Durchströmen von der Dichtung verhindert. Befindet sich das Absperrventil innerhalb des Raumes und wird teilweise von der Dichtung überdeckt, dann wird der Raum zum Spannen des Blocksaugers dennoch zuverlässig mit Unterdruck versorgt. Ragt das Absperrventil jedoch teilweise ins Freie und wird teilweise von der Dichtung abgedeckt, dann wird dass Absperrventil nicht geschaltet. Aufgrund der breiten Dichtung wird aber der Raum zum Spannen des Blocksaugers nicht über das Absperrventil mit der Außenseite, dass heißt mit der Umgebung verbunden.The seal of the shut-off valve is advantageous Block suction device wider than the width of the flow channels the shut-off valve. In this way, leaks are avoided only partially covered by the vacuum block Shut-off valves, which lead to malfunctions, that is defective Suction of the vacuum block could result. Becomes the vacuum block placed on the support base in such a way that the seal is seated on a shut-off valve, this is complete locked. If this shut-off valve is still operated, that means to be opened, then a flow through the Seal prevented. The shut-off valve is inside of the room and is partially covered by the seal, then the space for clamping the vacuum block is still reliable supplied with negative pressure. However, the shut-off valve protrudes partly outdoors and partly by the seal then the shut-off valve is not switched. Due to the wide seal, however, there is room for tension of the vacuum block does not have the shut-off valve with the Outside, that means connected to the environment.

Bei einem bevorzugten Ausführungsbeispiel ist vorgesehen, dass die Unterseite des Blocksaugers im abgeschlossenen Raum ein ferromagnetisches Element aufweist. Auf diese Weise wird bereits durch das Aufsetzen des Blocksaugers auf die Auflagebasis die unter dem ferromagnetischen Element sich befindenden Absperrventile geöffnet. Das ferromagnetische Element ist derart innerhalb des von der Dichtung umgrenzenden Raumes vorgesehen, dass alle die innerhalb dieses Raumes sich befindenden Absperrventile geöffent werden.In a preferred embodiment it is provided that the bottom of the vacuum block in the locked room has ferromagnetic element. That way already by placing the suction cup on the Support base that under the ferromagnetic element itself shut-off valves are open. The ferromagnetic Element is within the boundary of the seal Space provided that all of those within that space themselves shut-off valves are opened.

Gemäß einem bevorzugten Ausführungsbeispiel ist der Blocksauger modular aufgebaut und weist austauschbare Oberteile für unterschiedliche Werkstückgrößen auf. Dies hat den wesentlichen Vorteil, das für bestimmte Werkstücke, z.B. sehr schmale Werkstücke, Werkstücke mit schwierig festzusaugenden Obeflächen usw. nicht jeweils ein spezieller Blocksauger bereitgestellt werden muss, sondern lediglich der Blocksauger mit einem speziellen Aufsatz versehen werden muss.According to a preferred embodiment, the Vacuum block is modular and has interchangeable Tops for different workpiece sizes. this has the essential advantage that for certain workpieces, e.g. very narrow workpieces, workpieces with difficult surfaces to be fixed, not a special one Vacuum block must be provided, only the Vacuum block must be provided with a special attachment.

Durch diese erfindungsgemäße Ausgestaltung des Vakuumspannsystems kann die Auflagebasis ein Spannbalken oder ein Spanntisch sein, wobei der Spanntisch von mehreren miteinander koppelbaren Spannmodulen aufgebaut sein kann. Aufgrund der erfindungsgemäßen Ausgestaltung kann der Blocksauger an einer beliebigen Position des Spanntisches aufgesetzt werden, wobei es keiner exakten Ausrichtung des Blocksaugers bedarf. Durch ein geeignetes Maschinenprogramm kann zum Beispiel die erforderliche Anzahl von Blocksaugern errechnet und es können die optimalen Positionen der Blocksauger auf dem Spanntisch zum Spannen des Werkstücks bestimmt werden. Diese Positionen können zum Beispiel mittels eines Laserstrahls auf dem Spanntisch angezeigt werden, so dass dort die Blocksauger positioniert werden können. Auf diese Weise können die Werkstücke zum einen optimal gehalten, zum anderen optimal unterstützt werden, so dass Schwingungen beim Bearbeiten der Werkstücke weitestgehend vermieden werden.Through this embodiment of the invention Vacuum clamping system, the support base can be a clamping beam or be a chuck table, the chuck table by several clamping modules that can be coupled to one another can be constructed. Because of the configuration according to the invention, the Vacuum block at any position on the clamping table be put on, there is no exact alignment of the Block vacuum needs. Through a suitable machine program can, for example, the required number of vacuum blocks calculated and the optimal positions of the Vacuum block on the clamping table for clamping the workpiece be determined. These positions can be created using, for example a laser beam can be displayed on the clamping table, so that the vacuum blocks can be positioned there. On in this way, the workpieces can be held optimally, on the other hand are optimally supported so that vibrations are largely avoided when machining the workpieces.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders bevorzugtes Ausführungsbeispiel im einzelnen beschrieben ist. In der Zeichnung zeigen:

Figur 1
einen Längsschnitt durch einen Blocksauger sowie die Auflagebasis gemäß der Erfindung;
Figur 2
eine Ansicht auf die Unterseite des Blocksaugers; und
Figur 3
eine Draufsicht auf eine als Spanntisch ausgebildete Auflagebasis.
Further advantages, features and details of the invention emerge from the subclaims and the following description, in which a particularly preferred exemplary embodiment is described in detail with reference to the drawing. The drawing shows:
Figure 1
a longitudinal section through a suction block and the support base according to the invention;
Figure 2
a view of the underside of the vacuum block; and
Figure 3
a plan view of a support base designed as a clamping table.

In der Figur 1 ist der obere Teil einer insgesamt mit 1 bezeichneten Auflagebasis dargestellt, in welchem ein Absperrventil 2 angeordnet ist. Über dieses Absperrventil 2, welches in der Figur 1 seine Schließlage einnimmt, wird ein Strömungskanal 3 geöffnet, bzw. verschlossen. Oberhalb des Absperrventils 2 befindet sich ein insgesamt mit 4 bezeichneter Blocksauger, über welchen ein Werkstück 5, zum Beispiel eine Spannplatte oder dergleichen, angesaugt und festgehalten werden kann. Der Blocksauger 4 besitzt an seiner Unterseite 6 eine umlaufende Dichtung 7, welche einen Raum 8 abgrenzt. Innerhalb dieses Raumes 8 ist an der Unterseite 6 eine aus ferromagnetischem Material bestehende Platte 9, zum Beispiel eine Stahlplatte, festgeschraubt. Diese Platte 9 weist eine zentrale Öffnung 10 auf, welche mit einem Strömungskanal 11 fluchtet. Unmittelbar hinter der Öffnung 10 befindet sich ein Sieb 12. Die Dichtung 7 und die Platte 9 befinden sich an einem Unterteil 13 des Blocksaugers 4. Auf dieses Unterteil 13 ist ein Oberteil 14 aufgeschraubt, auf dessen Oberseite 15 das Werkstück 5 aufgelegt wird.In FIG. 1, the upper part is one with a total of 1 designated edition basis, in which a Shut-off valve 2 is arranged. Via this shut-off valve 2, which assumes its closed position in FIG. 1 becomes a Flow channel 3 opened or closed. Above the Shut-off valve 2 is a total of 4 designated block suction, over which a workpiece 5, for Example, a clamping plate or the like, sucked and can be held. The vacuum block 4 has on his Bottom 6 a circumferential seal 7, which a space 8th demarcates. Within this space 8 is at the bottom 6 a plate 9 made of ferromagnetic material for Example a steel plate, screwed tight. This plate 9 has a central opening 10, which with a Flow channel 11 is aligned. Immediately behind the opening 10 there is a sieve 12. The seal 7 and the plate 9 are located on a lower part 13 of the suction block 4. On this lower part 13 is screwed onto an upper part 14 the upper side 15 of which the workpiece 5 is placed.

Die Figur 2 zeigt die Unterseite 6 des Unterteils 13 des Blocksaugers und insbesondere die Platte 9, die mittels vier Schrauben 34 am Unterteil 13 befestigt ist. In der Mitte befindet sich die zentrale Öffnung 10. Um die Platte 9 umlaufend befindet sich die Dichtung 7, die eine gewisse Breite B aufweist.FIG. 2 shows the underside 6 of the lower part 13 of the Block suction device and in particular the plate 9, which means four Screws 34 is attached to the lower part 13. In the middle there is the central opening 10. Around the plate 9 all around the seal 7 is a certain Width B.

Die Figur 3 zeigt einen Spanntisch 42 als Ausführungsform der Auflagebasis 1. Dieser Spanntisch 42 wird im vorliegenden Ausführungsbeispiel von drei Modulen 43 bis 45 aufgebaut, die mit ihren Längsseiten aneinandergesteckt werden können. Die Module sind mit in Längsrichtung verlaufenden Strömungskanälen 46 versehen, in welche die Strömungskanäle 3 einmünden. Die Stirnseiten 47 der Module 43 bis 45 sind an ein Sammelmodul 48 angeschlossen, über welches zentral alle Strömungskanäle 46 mit Unterdruck versorgt werden können. Auf diese Weise können Spanntische 42 mit nahezu beliebiger Größe aufgebaut werden.FIG. 3 shows a clamping table 42 as an embodiment of the Support base 1. This clamping table 42 is used in the present Embodiment of three modules 43 to 45 constructed, the can be plugged together with their long sides. The Modules have longitudinal flow channels 46 provided, into which the flow channels 3 open. The End faces 47 of modules 43 to 45 are connected to a collecting module 48 connected via which all flow channels 46 can be supplied with negative pressure. That way you can Clamping tables 42 can be constructed with almost any size.

Die Strömungskanäle 3 weisen eine Breite b auf. Außerdem ist der größte Abstand a zweier benachbarter Absperrventile 2 kleiner als der kleinste Abstand A einander gegenüberliegender Dichtungen 7 an der Unterseite des Blocksauger 4 (Figur 2). Auf diese Weise wird sichergestellt, dass beim Aufsetzen eines Blocksaugers 4 auf einen Spanntisch 42 der Raum 8 auf jeden Fall über einem Absperrventil 2 liegt, so dass dieser auf jeden Fall mit Unterdruck versorgt werden kann. Als Absperrventil 2 kann ein elektromagnetisch oder durch Laserstrahl betätigbares Ventil, ein Tastventil oder ein Strömungsventil, welches z.B. auch einen Bypass aufweisen kann, verwendet werden.The flow channels 3 have a width b. Besides, is the greatest distance a between two adjacent shut-off valves 2 smaller than the smallest distance A opposite one another Seals 7 on the underside of the suction block 4 (Figure 2). In this way it is ensured that when putting on a Block suction 4 on a clamping table 42 the room 8 on each Case over a shut-off valve 2, so that this is on can always be supplied with negative pressure. As Shut-off valve 2 can be an electromagnetic or laser beam actuable valve, a touch valve or a Flow valve, which e.g. also have a bypass can be used.

Claims (8)

  1. A vacuum clamping system with a support base (1) and a block suction device (4) which can be placed on a support surface of the support base (1) and on which workpieces (5) to be clamped can be placed, wherein the support base (1) is provided with shut off valves (2), through which air can be aspirated off and the block suction device (4) and/or the workpiece (5) are clamped, and wherein the block suction device (4) has a seal (7) surrounding at least one shut-off valve (2) on its underside (6) resting on the support surface, by means of which seal (7) a closed space (8) is formed, which can be evacuated by means of the shut-off valve (2), wherein the distance (a) between two shut-off valves (2), or the distance (a) of their flow cross sections on the support level of the support base (1) is smaller than or the same as the distance (A) between two seals (7), which are located opposite each other and border the shut-off valves (2), or at least between two seal edges of the seal (7) of the closed space (8) of the block suction device (4) which are located opposite each other, characterized in that the shut-off valves (2) are connected to a single suction circuit, that the clamping of the workpiece (5) is results from the closed space (8), which serves for the clamping of the suction device (4) and that the suction device (4) can take up any desired and also turned position on the support base (1).
  2. The vacuum clamping system in accordance with claim 1, characterized in that the seal (7) of the block suction device (4) bordering the shut-off valve (2) is wider (width B) than the width (b) of the flow conduits (3) of the shut-off valve (2).
  3. The vacuum clamping system in accordance with one of the preceding claims, characterized in that the underside (6) of the block suction device (4) has a ferromagnetic element (9) in the closed space (8), e.g. a plate made of ferromagnetic material.
  4. The vacuum clamping system in accordance with one of the preceding claims, characterized in that the block suction device (4) is modularly constructed and has interchangeable tops (14) for different sizes of workpieces.
  5. The vacuum clamping system in accordance with one of the preceding claims, characterized in that the support base (1) is a spreading bar or a jig table (42), which in particular is constituted by one or several clamping modules (43, 44, 45), which can be coupled to each other.
  6. The vacuum clamping system in accordance with one of the preceding claims, characterized in that, as a function of the shape of the workpiece (5), the position of several block suction devices (4) can be determined by means of a machine program, and that the position on the support base (1) in particular can be indicated, for example by means of a laser.
  7. The vacuum clamping system in accordance with one of the preceding claims, characterized in that the vacuum supply of the block suction device is provided without hoses.
  8. The vacuum clamping system in accordance with one of the preceding claims, characterized in that the shut-off valve (2) is a valve which can be actuated electromagnetically or by a laser beam, or is a flow valve or a key valve.
EP98114648A 1997-10-22 1998-08-04 Vacuum clamping system Expired - Lifetime EP0911118B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29823472U DE29823472U1 (en) 1997-10-22 1998-08-04 Vacuum clamping system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19746497 1997-10-22
DE19746497A DE19746497C2 (en) 1997-10-22 1997-10-22 Vacuum clamping system

Publications (2)

Publication Number Publication Date
EP0911118A1 EP0911118A1 (en) 1999-04-28
EP0911118B1 true EP0911118B1 (en) 2004-05-26

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ID=7846183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114648A Expired - Lifetime EP0911118B1 (en) 1997-10-22 1998-08-04 Vacuum clamping system

Country Status (3)

Country Link
US (1) US6095506A (en)
EP (1) EP0911118B1 (en)
DE (2) DE19746497C2 (en)

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Also Published As

Publication number Publication date
EP0911118A1 (en) 1999-04-28
US6095506A (en) 2000-08-01
DE19746497A1 (en) 1999-05-06
DE59811454D1 (en) 2004-07-01
DE19746497C2 (en) 2000-04-06

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