EP1277541B1 - Clamping element for positionflexible clamping a workpiece - Google Patents
Clamping element for positionflexible clamping a workpiece Download PDFInfo
- Publication number
- EP1277541B1 EP1277541B1 EP02102026A EP02102026A EP1277541B1 EP 1277541 B1 EP1277541 B1 EP 1277541B1 EP 02102026 A EP02102026 A EP 02102026A EP 02102026 A EP02102026 A EP 02102026A EP 1277541 B1 EP1277541 B1 EP 1277541B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping
- chuck
- housing
- piston
- element according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/12—Arrangements for positively actuating jaws using toggle links
- B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/006—Supporting devices for clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/061—Arrangements for positively actuating jaws with fluid drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/061—Arrangements for positively actuating jaws with fluid drive
- B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/16—Details, e.g. jaws, jaw attachments
Definitions
- the invention relates to a clamping element for positionally flexible clamping of workpieces with hydraulically actuated clamping jaws which are attached to the workpiece approachable and fixable and the tensioning element to a floating Make element.
- Clamping elements are used for clamping workpieces to the Firmly fix workpiece against all machining forces. Here it is required to pick up the workpiece positioned and in this position clamp and furthermore support it everywhere with clamping elements where due to the Machining forces distortions or deformations of the workpiece done can.
- These clamping elements which help to tighten the clamping process are preferably used, must be designed so that they are applied to the the workpiece does not generate any transverse forces that a predetermined position of the Workpiece influence.
- clamping elements are usually actuated hydraulically to the workpiece moved up.
- This approach requires a balance between the opposite clamping jaws, so that they with equal force on the workpiece come to the concern.
- the hydraulic system via only one pressure line Drive members and the jaws fed equally, so that the Force distribution between the jaws takes place via the hydraulic system.
- the Clamping jaws that first touches the workpiece remains due to the workpiece outgoing resistance while the other clamping jaws continue, until it also rests against the workpiece. Now builds up between two jaws evenly applied pressure on the workpiece. Act on the Workpiece forces greater than those generated solely by the hydraulics Holding forces are, it comes to deformations of the workpiece and to Impairment of the machining process.
- the known clamping elements are due to their design with considerable Frictional forces loaded. This is partly due to seals in the Hydraulic area are required and the cylindrical parts against each other seal as they move together. Large dimensions lead to large masses of moving parts and thus also to inertial forces, by the Deformations on the workpiece do not fail, resulting in manufacturing inaccuracies leads. In addition, the clamping range of such elements is not all Customizable applications, resulting in elements of different sizes Processing of different workpieces are required.
- the clamping element a large clamping range assign, the different workpieces is adaptable and the forces in so initiate the tensioning operation so that they cause the workpiece to settle, without affecting this in its positioned position and that in the workpiece initiated holding forces during the machining process regardless of to maintain external influences.
- Fig. 1 the element is shown in section.
- the stationary housing 1 is a Clamping insert 2 guided.
- This clamping insert 2 has a rectangular cross-section and is inserted into the housing so that it protrudes from the housing on one side. Accordingly, the housing 1 is provided on one side with a recess. To guide the clamping insert 2, this is on the side of the housing opening with provided oblique guide surfaces 4 and the housing 1 with inward directed bevels 5.
- the clamping insert 2 in the housing 1 on the sides and sliding contact surfaces.
- the piston 3 In clamping insert 2, the piston 3 is guided.
- the piston 3 has at its head a Dome 6, in which a ball 7 is mounted as part of a connecting rod 8.
- To the connecting rod 8 includes a second ball 9, which in a cap 10 of a clamping lever 11th is introduced.
- the tensioning lever 11 has a pivot 12, located in the upper part of the clamping insert 2 is located.
- the piston 3 has two pressure chambers, of which the pressure chamber 13 for clamping and the pressure chamber 14 for relaxing serve. The pressure chambers are connected via two flexible pressure lines over the Terminals 15 and 16 fed.
- the clamping insert 2 is at its lying in the housing recess side with a plurality of position holes 17 provided along the side surface in this are admitted.
- position pins 18 can be used.
- the position holes are introduced at a predetermined distance, which is results from the use cases.
- the position holes serve to the Maximalhub 19 of the clamping system to reduce and the respective adapted workpiece.
- These jaws are provided with corresponding fitting holes, in each case a positioning pin fits, so that the clamping jaws 20, 21 in the position holes 17 arbitrarily insertable and by means of threaded bolts in appropriate Tapped holes 23 can be fixed.
- Clamping piston 24 is provided in the housing 1 in a cylinder bore.
- This clamping piston 24 is designed so that it is in applied state on the outer wall of the clamping insert 2 presses.
- the Clamping piston 24 is controlled separately, but it can also by means of a Sequence control depending on the completed clamping state to be actuated.
- the piston 3 In the rest position, the piston 3 is moved down and the clamping insert 2 in his lowest position. Depending on the workpiece thickness of the clamping jaws 20 in the corresponding position holes brought and by means of the fine adjustment screw 22 adjusted to the workpiece. Only for large workpieces, the maximum stroke Claim 19 and can hang up directly on the jaws 21, deleted the clamping jaws 20.
- the lever arm 11 is upwards in the vertical position pivoted and thus gives the space for the insertion of the workpiece 25 free.
- the Clamping initiated.
- the pressure chamber 13 is pressurized the Piston 3 moves upward and moves the clamping lever 11 in the pivot 12 on the Workpiece 25 too.
- the connecting rod 8 with its balls 7, 9 ensures the balance of Movement sequence. This process continues until the tension lever 11 with his Pressure surface 26 rests on the workpiece 25. Now the workpiece offers the Clamping lever as a result of the resistance occurring stops in its movement. This clamping process goes without significant friction in the contact surfaces vonstatten. This means that the clamping lever 11 at its contact surface 26 also no significant force is introduced into the workpiece 25. The continue however, the upcoming hydraulic pressure moves the piston further upwards.
- the clamping process acts optimally when the center of rotation and center of the ball 7 with the center of the pivot joint 12 and the contact point of the pressure surface 26th lying on a straight line.
- the vertical stroke of the clamping insert can by appropriate measures, such as Longitudinal groove and screw are limited.
- the tensioning element is as positionflexibles element and thus as a floating Element can be used.
- a floating element suits it already preloaded workpiece and supports this at the points where Machining forces can act, for tension or even deformation contribute to the workpiece.
- Figs. 5-7 show another element.
- a clamping insert 30 is guided with a circular cross-section.
- the piston 3 is introduced, which carries the connecting rod 8 with the balls 7: 9 and the clamping lever 11 at the head end via dome 6.
- the clamping insert 30 has at the head end, the rotary joint 12 for the clamping lever 11 and a fixed cantilever jaw 31.
- the workpiece 25 is inserted between the clamping jaw 31 and the clamping lever 11.
- a clamping piston 32 which is, however, provided with a prismatic Anstell Design, the circular cross section of the clamping insert is adjusted.
- the clamping piston 32 is controlled via its own pressure channel 47. In the tensioned state pushes the clamping piston the clamping insert against the housing inner bore and sets this with it.
- the clamping insert is once by a virtually smooth guidance in the housing made smooth, the dirt wiper 33 no impairment represent, since they are just on the clamping insert to concern.
- To the other two pipe springs 34, 35 are provided, which serve as feeders for the Serve hydraulics.
- the two coil springs 34, 35 fit smoothly into the System by length depending on the direction of movement of the clamping insert or compress without generating a significant restoring force.
- the introduction of the tube springs 34, 35 requires exact connections in terms of Hydraulic transitions.
- the tube spring 34 is used for clamping and the tube spring 35th to relax the system.
- For clamping the pressure chamber 13 is acted upon.
- the hydraulic at the terminal 36 via the nipple 37 in the tube spring 34th passed and added via nipple 38 and channel 39 into the pressure chamber 13.
- the Piston 3 moves up and puts the clamping lever 11 on the workpiece 25. Der Resistance to the workpiece 25 is sufficient to now the clamping insert 30 together with the piston 3 to go up until the jaw31 under the Workpiece 25 comes to rest. Now the pressure builds up on levers 11 and Jaws 31 equal to, whereby the clamping insert a firm connection received with the workpiece.
- the clamping piston 32 is acted upon, the presses the clamping insert 30 against the housing and in this position in the Clamp housing 29.
- Bourdon tube 35 To release 41 pressure in the Bourdon tube 35 is given via port 40 and nipple and from here the hydraulics via nipple 42 and channel 43 into the piston chamber 44th directed.
- the clamping piston 32 by relieving the hydraulic pressure at 47 moved back by means of its diaphragm spring and the pressure chamber 13 without pressure been made.
- the bourdon tubes are made of nipples and tabs Screwed.
- the tube spring 35 is with her nipple 38 by means Brazing connected.
- a pocket 45 is provided in which engages a movable roller 46.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Spannelement zum positionsflexiblen Spannen von Werkstücken mit hydraulisch betätigten Spannbacken, die an das Werkstück heranfahrbar und festsetzbar sind und das Spannelement zu einem schwimmenden Element machen.The invention relates to a clamping element for positionally flexible clamping of workpieces with hydraulically actuated clamping jaws which are attached to the workpiece approachable and fixable and the tensioning element to a floating Make element.
Aus der EP-A-0 614 729 ist ein Spannelement zum Spannen von Werkstücken mit hydraulisch betätigten Spann hebel bekannt.From EP-A-0 614 729 a tensioning element for tensioning is provided of workpieces with hydraulically operated clamping lever known.
Spannelemente werden zum Spannen von Werkstücken eingesetzt, um das Werkstück gegen alle Bearbeitungskräfte unverrückbar festzusetzen. Hier ist es erforderlich, das Werkstück positioniert aufzunehmen und in dieser Lage zu spannen und ferner überall dort mit Spannelementen abzustützen, wo infolge der Bearbeitungskräfte Verspannungen oder Verformungen des Werkstückes erfolgen können. Diese Spannelemente, die zur Unterstützung des Spannvorganges bevorzugt eingesetzt werden, müssen so gestaltet sein, dass sie beim Anlegen an das Werkstück keine Querkräfte erzeugen, die eine vorgegebene Lage des Werkstückes beeinflussen.Clamping elements are used for clamping workpieces to the Firmly fix workpiece against all machining forces. Here it is required to pick up the workpiece positioned and in this position clamp and furthermore support it everywhere with clamping elements where due to the Machining forces distortions or deformations of the workpiece done can. These clamping elements, which help to tighten the clamping process are preferably used, must be designed so that they are applied to the the workpiece does not generate any transverse forces that a predetermined position of the Workpiece influence.
Diese Spannelemente werden in der Regel hydraulisch betätigt an das Werkstück herangefahren. Dieses Heranfahren bedingt einen Ausgleich zwischen den gegenüber liegenden Spannbacken, damit diese mit gleicher Kraft am Werkstück zum Anliegen kommen. Hierzu wird die Hydraulik über nur eine Druckleitung den Antriebsorganen und den Spannbacken gleichermaßen zugeführt, so dass die Kraftverteilung zwischen den Spannbacken über die Hydraulik erfolgt. Der Spannbacken, der zuerst das Werkstück berührt, bleibt infolge des vom Werkstück ausgehenden Widerstandes stehen, während der andere Spannbacken weiterfährt, bis auch er am Werkstück anliegt. Nun baut sich zwischen beiden Spannbacken ein gleichmäßig auf das Werkstück einwirkender Druck auf. Wirken jedoch auf das Werkstück Kräfte ein, die größer als die allein durch die Hydraulik erzeugten Haltekräfte sind, kommt es zu Verformungen des Werkstückes und zu Beeinträchtigungen des Bearbeitungsablaufes.These clamping elements are usually actuated hydraulically to the workpiece moved up. This approach requires a balance between the opposite clamping jaws, so that they with equal force on the workpiece come to the concern. For this purpose, the hydraulic system via only one pressure line Drive members and the jaws fed equally, so that the Force distribution between the jaws takes place via the hydraulic system. Of the Clamping jaws that first touches the workpiece remains due to the workpiece outgoing resistance while the other clamping jaws continue, until it also rests against the workpiece. Now builds up between two jaws evenly applied pressure on the workpiece. Act on the Workpiece forces greater than those generated solely by the hydraulics Holding forces are, it comes to deformations of the workpiece and to Impairment of the machining process.
Die bekannten Spannelemente sind aufgrund ihrer Bauweise mit erheblichen Reibungskräften belastet. Dieses beruht zum Teil auf Dichtungen, die im Hydraulikbereich erforderlich sind und die zylinderische Teile gegeneinander abdichten, während diese sich gemeinsam bewegen. Große Baumaße führen zu großen Massen der beweglichen Teile und damit auch zu Trägheitskräften, durch die Verformungen am Werkstück nicht ausbleiben, was zu Fertigungsungenauigkeiten führt. Darüber hinaus ist der Spannbereich solcher Elemente nicht allen Anwendungen anpassbar, was dazu führt, dass Elemente verschiedener Größe zur Bearbeitung verschiedener Werkstücke erforderlich werden.The known clamping elements are due to their design with considerable Frictional forces loaded. This is partly due to seals in the Hydraulic area are required and the cylindrical parts against each other seal as they move together. Large dimensions lead to large masses of moving parts and thus also to inertial forces, by the Deformations on the workpiece do not fail, resulting in manufacturing inaccuracies leads. In addition, the clamping range of such elements is not all Customizable applications, resulting in elements of different sizes Processing of different workpieces are required.
Es ist somit Aufgabe der Erfindung, dem Spannelement einen großen Spannbereich zuzuordnen, der unterschiedlichen Werkstücken anpassbar ist und die Kräfte so in den Spannvorgang einzuleiten, dass sie das Festsetzen des Werkstückes bewirken, ohne dieses in seiner positionierten Lage zu beeinflussen und die in das Werkstück eingeleiteten Haltekräfte während des Bearbeitungsvorganges unabhängig von äusseren Einflüssen aufrecht zu erhalten.It is therefore an object of the invention, the clamping element a large clamping range assign, the different workpieces is adaptable and the forces in so initiate the tensioning operation so that they cause the workpiece to settle, without affecting this in its positioned position and that in the workpiece initiated holding forces during the machining process regardless of to maintain external influences.
Die Lösung der Aufgabe ist den kennzeichnenden Merkmalen der Ansprüche zu entnehmen. Die Erfindung ist in den Zeichnungen beschrieben.
- Fig. 1
- zeigt ein Element im Längsschnitt
- Fig. 2
- zeigt einen Querschnitt
- Fig. 3
- zeigt eine Seitenansicht
- Fig. 4
- zeigt eine Seitenansicht
- Fig. 5
- zeigt ein Spannelement mit Rohrfedersystem
- Fig. 6
- zeigt eine Seitenansicht
- Fig. 7
- zeigt einen Querschnitt
- Fig. 1
- shows an element in longitudinal section
- Fig. 2
- shows a cross section
- Fig. 3
- shows a side view
- Fig. 4
- shows a side view
- Fig. 5
- shows a clamping element with pipe spring system
- Fig. 6
- shows a side view
- Fig. 7
- shows a cross section
In Fig. 1 ist das Element im Schnitt gezeigt. In dem feststehenden Gehäuse 1 ist ein
Spanneinsatz 2 geführt. Dieser Spanneinsatz 2 hat einen Rechteckquerschnitt und
ist so in das Gehäuse eingefügt, dass er einseitig aus dem Gehäuse herausragt.
Dementsprechend ist das Gehäuse 1 an einer Seite mit einer Aussparung versehen.
Zur Führung des Spanneinsatzes 2 ist dieser an der Seite der Gehäuseöffnung mit
schrägen Führungsflächen 4 versehen und das Gehäuse 1 mit nach innen
gerichteten Schrägen 5. Somit ist der Spanneinsatz 2 im Gehäuse 1 an den Seiten
und Berührungsflächen gleitend geführt.In Fig. 1, the element is shown in section. In the stationary housing 1 is a
Im Spanneinsatz 2 ist der Kolben 3 geführt. Der Kolben 3 weist an seinem Kopf eine
Kalotte 6 auf, in der eine Kugel 7 als Teil eines Pleuels 8 gelagert ist. Zu dem Pleuel
8 gehört eine zweite Kugel 9, die in einer Kalotte 10 eines Spannhebels 11
eingebracht ist. Der Spannhebel 11 hat ein Drehgelenk 12, das sich im oberen Teil
des Spanneinsatzes 2 befindet. Der Kolben 3 hat zwei Druckkammern, von denen
die Druckkammer 13 zum Spannen und die Druckkammer 14 zum Entspannen
dienen. Die Druckkammern werden über zwei flexible Druckleitungen über die
Anschlüsse 15 und 16 gespeist. In
Der Spanneinsatz 2 ist an seiner in der Gehäuse-Aussparung liegenden Seite mit
mehreren Positionsbohrungen 17 versehen, die längs der Seitenfläche in diese
eingelassen sind. In diese Positionsbohrungen 17 sind Positionsstifte 18 einsetzbar.
Die Positionsbohrungen sind in einem vorgegebenen Abstand eingebracht, der sich
aus den Anwendungsfällen ergibt. Die Positionsbohrungen dienen dazu, den
Maximalhub 19 des Spannsystems verringern zu können und dem jeweils
eingesetzten Werkstück anzupassen. Diese Positionsbohrungen nehmen
Spannbacken 20 und 21 auf, von denen der Spannbacken 20 mit einem Gewinde
versehen ist, in das eine Feineinstellschraube 22 mit Festsetzmutter eingefügt ist.
Diese Spannbacken sind mit entsprechenden Passbohrungen versehen, in die jeweils
ein Positionsstift passt, so dass die Spannbacken 20, 21 in den Positionsbohrungen
17 beliebig einfügbar und mittels Gewindebolzen in entsprechenden
Gewindebohrungen 23 festsetzbar sind.The
In dem Gehäuse 1 ist quer zum Spanneinsatz 2 in einer Zylinderbohrung ein
Klemmkolben 24 vorgesehen. Dieser Klemmkolben 24 ist so ausgelegt, dass er im
beaufschlagten Zustand auf die Außenwand des Spanneinsatzes 2 drückt. Der
Klemmkolben 24 wird separat angesteuert, er kann aber auch mittels einer
Folgesteuerung in Abhängigkeit vom vollzogenen Spannzustand betätigt werden.In the housing 1 is transverse to the
In der Ruhestellung ist der Kolben 3 nach unten gefahren und der Spanneinsatz 2 in
seiner untersten Stellung. Je nach Werkstückdicke wird der Spannbacken 20 in die
entsprechenden Positionsbohrungen gebracht und mittels der Feineinstellschraube
22 auf das Werkstück justiert. Nur bei großen Werkstücken, die den Maximal-Hub
19 beanspruchen und sich direkt auf den Spannbacken 21 auflegen lassen, entfällt
der Spannbacken 20. Der Hebelarm 11 ist nach oben in die senkrechte Lage
geschwenkt und gibt damit den Platz für das Einlegern des Werkstückes 25 frei.In the rest position, the
Ist das Werkstück dem Spannelement zum Spannen zugeordnet, wird der
Spannvorgang eingeleitet. Die Druckkammer 13 wird mit Druck beaufschlagt der
Kolben 3 fährt nach oben und bewegt den Spannhebel 11 im Drehgelenk 12 auf das
Werkstück 25 zu. Das Pleuel 8 mit seinen Kugeln 7, 9 sorgt für den Ausgleich des
Bewegungsablaufes. Dieser Vorgang geht so lange bis der Spannhebel 11 mit seiner
Andruckfläche 26 auf dem Werkstück 25 aufliegt. Jetzt bietet das Werkstück dem
Spannhebel infolge des auftretenden Widerstandes Einhalt in seiner Bewegung.
Dieser Spannvorgang geht ohne nennenswerte Reibung in den Berührungsflächen
vonstatten. Das bedeutet, dass vom Spannhebel 11 an seiner Andruckfläche 26 auch
keine nennenswerte Kraft in das Werkstück 25 eingeleitet wird. Der weiterhin
anstehende Hydraulikdruck bewegt jedoch den Kolben weiter nach oben. Durch die
Abstützung des Spannhebel 11 auf dem Werkstück 25 wird nunmehr der
Spanneinsatz 2 vom Kolben 3 mitgenommen und der Gelenkpunkt 12 nach oben
geführt. Damit wird der Spannbacken 20 unten an das Werkstück 25 herangeführt
und kommt zur Anlage. Dieser Vorgang wird durch die Feder 28 unterstützt, die
vertikal eingefügt ist, so dass sie die Anhebung des Spanneinsatzes 2 unterstützt,
indem sie das Gewicht des Spanneinsatzes aufnimmt. Liegt der Spannbacken 20 am
Werkstück 25 an, besteht an dem Werkstück ein Druckausgleich zwischen der
Andruckfläche 26 des Hebels 11 und der Andruckfläche 27 der Feineinstellschraube
22 und es baut sich am Werkstück ein beidseitig gleichmässiger Druck auf und der
Spanneinsatz 2 geht dadurch eine feste Verbindung mit dem Werkstück ein.If the workpiece is assigned to the clamping element for clamping, the
Clamping initiated. The
Dieser Spannvorgang wird so lange aufrecht erhalten, wie der Druck in der Zuleitung
15 ansteht. Der vertikal in seinen Führungen noch bewegliche Spanneinsatz wird
nun in dem Gehäuse 1 festgesetzt. Dieses erfolgt durch Druckbeaufschlagung des
Klemmkolbens 24, der einen Druck auf die Seitenfläche des Spanneinsatzes 2
ausübt und dadurch den Spanneinsatz 2 mit seinen Schrägen 5 gegen die
Führungsflächen 4 des Gehäuses 1 presst. Der Klemmkolben 24 setzt somit den
Spanneinsatz 2 im Gehäuse 1 und damit auch das Werkstück 25 fest.This clamping process is maintained as long as the pressure in the
Der Spannvorgang wirkt optimal, wenn der Dreh- und Mittelpunkt der Kugel 7 mit
dem Mittelpunkt des Drehgelenks 12 und dem Auflagepunkt der Andruckfläche 26
auf einer Geraden liegen.The clamping process acts optimally when the center of rotation and center of the
Zum Entspannen wird der Druck vom Klemmkolben 24 weggenommen, der über
entsprechende Tellerfedern in seine Ausgangslage zurück geführt wird. Gleichzeitig
wird die Druckkammer 13 entlastet und die Druckkammer 14 beaufschlagt, womit
der Kolben 3 zurückgeführt wird, der Hebel 11 schwenkt in seine Ruhelage und das
Werkstück 25 ist zur Entnahme frei gegeben.To relax the pressure is removed from the
Der vertikale Hub des Spanneinsatzes kann durch entsprechende Maßnahmen, wie Längsnut und Schraube begrenzt werden.The vertical stroke of the clamping insert can by appropriate measures, such as Longitudinal groove and screw are limited.
Das Spannelement ist als positionsflexibles Element und damit als schwimmendes Element einsetzbar. Ein schwimmendes Element passt sich dem bereits vorgespannten Werkstück an und unterstützt dieses an den Stellen, an denen Bearbeitungskräfte einwirken können, die zur Verspannung oder gar Verformung des Werkstückes beitragen.The tensioning element is as positionflexibles element and thus as a floating Element can be used. A floating element suits it already preloaded workpiece and supports this at the points where Machining forces can act, for tension or even deformation contribute to the workpiece.
Die Fig. 5-7 zeigen ein weiteres Element.
In dem Gehäuse 29 ist ein Spanneinsatz 30 mit kreisförmigen Querschnitt geführt.
Im Innern des Spanneinsatzes 30 ist der Kolben 3 eingebracht, der am Kopfende
über Kalotte 6 das Pleuel 8 mit den Kugeln 7:9 und den Spannhebel 11 trägt. Der
Spanneinsatz 30 hat am Kopfende das Drehgelenk 12 für den Spannhebel 11 und
einen feststehenden auskragenden Spannbacken 31. Das Werkstück 25 ist zwischen
dem Spannbacken 31 und dem Spannhebel 11 einlegbar.Figs. 5-7 show another element.
In the
Zur Festsetzung des Spanneinsatzes 30 im Spannzustand dient ein Klemmkolben
32, der jedoch mit einer prismatischen Anstellfläche versehen ist, die dem
kreisförmigen Querschnitt des Spanneinsatzes angepasst ist. Der Klemmkolben 32
wird über einen eigenen Druckkanal 47 angesteuert. Im gespannten Zustand drückt
der Klemmkolben den Spanneinsatz gegen die Gehäuseinnenbohrung und setzt
diesen damit fest.To fix the clamping
Der Spanneinsatz wird einmal durch eine nahezu reibungslose Führung im Gehäuse
leichtgängig gemacht, wobei die Schmutzabstreifer 33 keine Beeinträchtigung
darstellen, da sie gerade eben am Spanneinsatz zum Anliegen kommen. Zum
anderen sind zwei Rohrfedern 34;35 vorgesehen, die als Zuführungen für die
Hydraulik dienen. Die beiden Rohrfedern 34, 35 fügen sich reibungslos in das
System ein, indem sie sich je nach Bewegungsrichtung des Spanneinsatzes längen
oder stauchen ohne eine nennenswerte Rückstellkraft zu erzeugen.The clamping insert is once by a virtually smooth guidance in the housing
made smooth, the
Die Einbringung der Rohrfedern 34, 35 bedingt exakte Anschlüsse hinsichtlich der
Hydraulikübergänge. Die Rohrfeder 34 dient zum Spannen und die Rohrfeder 35
zum Entspannen des Systems. Zum Spannen wird der Druckraum 13 beaufschlagt.
Hierzu wird die Hydraulik am Anschluß 36 über den Nippel 37 in die Rohrfeder 34
geleitet und über Nippel 38 und Kanal 39 in die Druckkammer 13 gegeben. Der
Kolben 3 fährt hoch und legt den Spannhebel 11 auf das Werkstück 25. Der
Widerstand am Werkstück 25 genügt um nunmehr den Spanneinsatz 30 zusammen
mit dem Kolben 3 nach oben zu fahren, bis der Spannbacken31 unter dem
Werkstück 25 zum Anliegen kommt. Jetzt baut sich der Druck am Hebel 11 und am
Spannbacken 31 gleich groß auf, wodurch der Spanneinsatz eine feste Verbindung
mit dem Werkstück eingeht. Nunmehr wird der Klemmkolben 32 beaufschlagt, der
den Spanneinsatz 30 gegen die Gehäusewandung drückt und in dieser Stellung im
Gehäuse 29 festklemmt.The introduction of the tube springs 34, 35 requires exact connections in terms of
Hydraulic transitions. The
Zum Lösen wird über Anschluß 40 und Nippel 41 Druck in die Rohrfeder 35 gegeben
und von hier die Hydraulik über Nippel 42 und Kanal 43 in den Kolbenraum 44
geleitet. Zuvor ist der Klemmkolben 32 durch Entlastung des Hydraulikdruckes bei
47 mittels seiner Tellerfeder zurückgefahren und der Druckraum 13 drucklos
gemacht worden. Die Rohrfedern werden von Nippeln und Laschen durch
Verschraubung gehalten. Die Rohrfeder 35 ist mit ihrem Nippel 38 mittels
Hartlötung verbunden.To release 41 pressure in the
Um den Spanneinsatz vor Verdrehung zu schützen ist eine Tasche 45 vorgesehen, in
die eine bewegliche Rolle 46 eingreift. To protect the clamping insert from twisting a
Claims (9)
- Clamping element for clamping work pieces (25) in a manner flexible in terms of position, using hydraulically operated clamping jaws (20, 31) that are adapted for being approached to said work piece (25) and fixed, characterised in that a clamping chuck (2; 30) with an internal piston (3) is guided in a housing (1; 29) for sliding movement, that said clamping chuck (2; 30) is provided with a clamping jaw (20; 31) and receives a clamping lever (11) via a swivel joint (12), that said clamping lever (11) is articulated to said piston (3) via a connecting rod (8), and that during the clamping operation said piston (3) urges said clamping lever (11) onto said work piece (25) and raises said clamping chuck (2; 30) on account of the resistance operated from said work piece onto said clamping lever whilst it moves said clamping jaw (20; 31) under said work piece and said work piece is caused to be fixed to said clamping chuck on account of the force established between said clamping lever and said clamping jaw.
- Clamping element according to Claim 1, characterised in that said housing is provided with a recess on one side, that said clamping chuck (2) is guided in a sliding movement in said recess via inclinations (5) provided in said housing and over guiding surfaces (4) mounted on said clamping chuck, and that said clamping chuck (2) is provided with a plurality of positioning bores (17) on its side located in said recess, which bores are adapted to receive said clamping jaws (20; 21) in a positioned arrangement.
- Clamping element according to the Claims 1 and 2, characterised in that said clamping jaw (20) is provided with a screw (22) for fine adjustment.
- Clamping element according to the Claims 1 and 2, characterised in that a clamping piston (24) is guided in a cylindrical bore in said housing (1) in a direction orthogonal on said clamping chuck (2), that said clamping piston (24) in its operated condition moves against said clamping chuck for pressing and fixing the chuck by its guiding surfaces (4) into said inclinations (5) of said housing.
- Clamping element according to the Claims 1 to 4, characterised in that the feeder lines of the hydraulic system, which lead to the ports (15; 16) in said clamping chuck, are flexible.
- Clamping element according to Claim 1, characterised in that a spring (28) is inserted into said clamping chuck (2; 30), which is supported on the bottom of said housing (1; 29) and whose spring force balances the weight of said clamping chuck.
- Clamping element according to Claim 1, characterised in that said clamping chuck (30) has a cylindrical configuration and is guided for a sliding movement in a housing (29), that a piston (3), provided with a connecting rod (8) and a clamping lever (11) at its head, is supported in said clamping chuck (30), and that a clamping piston (32) is disposed in a direction orthogonal on said clamping chuck (30), whose pressure area has a prismatic configuration and is adapted to the cross-sectional area of said clamping chuck (30) and which, in the operated condition, urges said clamping chuck (30) into the wall of the cylindrical bore in said housing (20).
- Clamping element according to the Claims 1 and 6, characterised in that tubular springs (34; 35) are disposed below said guided clamping chuck (30) in said housing (29), which springs establish a flexible connection for the hydraulic system between the external connectors on said housing and the pressure chambers (13 and 14) in the cylinder space of said clamping chuck for operating said piston (3).
- Clamping element according to Claim 7, characterised in that said tubular springs are connected by means of nipples and tabs on the ends to the associated connectors and ducts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10135280A DE10135280A1 (en) | 2001-07-19 | 2001-07-19 | Clamping element for flexible clamping of workpieces |
| DE10135280 | 2001-07-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1277541A1 EP1277541A1 (en) | 2003-01-22 |
| EP1277541B1 true EP1277541B1 (en) | 2003-11-12 |
| EP1277541B8 EP1277541B8 (en) | 2004-11-10 |
Family
ID=7692420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02102026A Expired - Lifetime EP1277541B8 (en) | 2001-07-19 | 2002-07-11 | Clamping element for positionflexible clamping a workpiece |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6719281B2 (en) |
| EP (1) | EP1277541B8 (en) |
| AT (1) | ATE254008T1 (en) |
| DE (2) | DE10135280A1 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4311616B2 (en) * | 2003-01-24 | 2009-08-12 | 株式会社コスメック | Spring lock type clamping device |
| US7815176B2 (en) | 2003-09-11 | 2010-10-19 | Phd, Inc. | Lock mechanism for pin clamp assembly |
| US7182326B2 (en) * | 2004-04-02 | 2007-02-27 | Phd, Inc. | Pin clamp |
| US7516948B2 (en) * | 2004-04-02 | 2009-04-14 | Phd, Inc. | Pin clamp accessories |
| DE102004053925A1 (en) * | 2004-11-05 | 2006-05-11 | Ludwig Ehrhardt Gmbh | Clamping device for clamping objects |
| US7448607B2 (en) * | 2004-12-15 | 2008-11-11 | Phd, Inc. | Pin clamp assembly |
| US20070267795A1 (en) * | 2006-02-06 | 2007-11-22 | Parag Patwardhan | Pin clamp transfer assembly and method of transferring a workpiece |
| US8256069B2 (en) * | 2007-03-15 | 2012-09-04 | Kosmek Ltd. | Link type clamp device |
| CA2690801C (en) | 2007-06-19 | 2015-05-26 | Bruce D. Mcintosh | Pin clamp assembly |
| US8376336B2 (en) * | 2008-06-18 | 2013-02-19 | Phd, Inc. | Strip off pin clamp |
| US8656568B2 (en) * | 2010-04-30 | 2014-02-25 | Smw Automotive Corporation | Apparatus for final finishing a wheel hub of a knuckle assembly and related method |
| US8746664B2 (en) | 2011-04-22 | 2014-06-10 | Delaware Capital Formation, Inc. | Spring actuated link clamp |
| WO2013074134A1 (en) * | 2011-11-17 | 2013-05-23 | National Institute Of Aerospace Associates | Radiation shielding materials containing hydrogen, boron and nitrogen |
| DE102014101924B3 (en) * | 2014-02-17 | 2015-01-29 | ALU4YOU GmbH | Device for position-variable clamping of a workpiece |
| EP2921260B1 (en) * | 2014-03-20 | 2016-08-31 | UNIVER S.p.A. | Pneumatically operable working machine |
| CN104384985B (en) * | 2014-10-22 | 2016-06-29 | 湖南凯斯机械股份有限公司 | A kind of fixture of Quick-clamped |
| CN104440276B (en) * | 2014-12-09 | 2017-11-24 | 江苏诚一阀门有限公司 | Valve element milling fixing device |
| DE102019121860A1 (en) * | 2019-08-14 | 2021-02-18 | Destaco Europe Gmbh | Jig |
| US11759914B2 (en) | 2020-08-06 | 2023-09-19 | Mate Precision Technologies Inc. | Vise assembly |
| WO2022032148A1 (en) | 2020-08-06 | 2022-02-10 | Mate Precision Technologies Inc. | Tooling base assembly |
| JP7380641B2 (en) * | 2021-04-26 | 2023-11-15 | 積水ハウス株式会社 | Positioning jig and assembly table |
| CN114083315B (en) * | 2021-12-06 | 2023-02-03 | 北轴(洛阳)科技有限公司 | Frock clamp is used in bearing processing |
| CN114633138B (en) * | 2022-03-04 | 2023-06-02 | 浙江开创电气股份有限公司 | Electric circular saw box turning tool |
| CN117444619B (en) * | 2023-12-22 | 2024-04-12 | 中铁山桥集团有限公司 | Integrated processing equipment for hot-rolled U-shaped ribs |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3528337A1 (en) * | 1985-08-07 | 1987-02-19 | Eugen Rapp | Clamping device |
| US4673173A (en) * | 1986-01-31 | 1987-06-16 | Kabushiki Kaisha Nippei Toyama | Workpiece clamping device |
| DE8621050U1 (en) * | 1986-08-06 | 1986-09-18 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Clamping device for a workpiece on a machine tool |
| DE4307058A1 (en) * | 1993-03-06 | 1994-09-08 | David Fischer | Clamping device for clamping workpieces on machine tables or pallets |
| DE19930990C1 (en) * | 1999-07-05 | 2000-12-28 | Tuenkers Maschinenbau Gmbh | Driven knee-lever tensioning apparatus especially for use in motor vehicle body manufacture |
-
2001
- 2001-07-19 DE DE10135280A patent/DE10135280A1/en not_active Withdrawn
-
2002
- 2002-07-11 EP EP02102026A patent/EP1277541B8/en not_active Expired - Lifetime
- 2002-07-11 DE DE50200104T patent/DE50200104D1/en not_active Expired - Lifetime
- 2002-07-11 AT AT02102026T patent/ATE254008T1/en active
- 2002-07-16 US US10/196,675 patent/US6719281B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1277541A1 (en) | 2003-01-22 |
| US20030015832A1 (en) | 2003-01-23 |
| EP1277541B8 (en) | 2004-11-10 |
| ATE254008T1 (en) | 2003-11-15 |
| DE50200104D1 (en) | 2003-12-18 |
| US6719281B2 (en) | 2004-04-13 |
| DE10135280A1 (en) | 2003-02-06 |
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