EP3412411B1 - Système de serrage - Google Patents

Système de serrage Download PDF

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Publication number
EP3412411B1
EP3412411B1 EP18172783.5A EP18172783A EP3412411B1 EP 3412411 B1 EP3412411 B1 EP 3412411B1 EP 18172783 A EP18172783 A EP 18172783A EP 3412411 B1 EP3412411 B1 EP 3412411B1
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EP
European Patent Office
Prior art keywords
clamping
elements
adjusting element
clamping elements
contact surface
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EP18172783.5A
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German (de)
English (en)
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EP3412411A1 (fr
Inventor
Frank Nickl
Jacek Woryna
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Individual
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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
    • B25B5/061—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
    • B25B5/003—Combinations of 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
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction

Definitions

  • the invention relates to a clamping system for clamping a blank.
  • Such raw parts can in particular be formed by cast parts, which typically consist of metallic materials.
  • FIG. 1 shows a clamping unit 1 according to the prior art in order to fix such a cast part 2, in the present case a die-cast part, on a base formed by a clamping plate 3.
  • the clamping unit comprises three separate clamping devices 4, which are anchored on the upper side of the clamping plate, these clamping devices preferably being fixed on the clamping plate by mechanical means.
  • the clamping devices must be arranged by a production engineer on the top of the clamping plate in order to fix it at suitable points on the cast part. This process is often cumbersome and time-consuming. This is based in particular on the fact that after clamping on the clamping plate, the cast part has to be machined in predefined work steps. The equipment engineer then has to fix the clamping device in places on the casting that do not have to be machined later.
  • the DE 27 36 412 A1 relates to a device for the rapid connection and positioning of a tool holder with a carrier.
  • the tool holder has a shank part which can be inserted into a bore of a carrier.
  • radially movable locking elements are provided on the shaft or on the carrier, which can be brought into contact with a shoulder on the respective other of the two parts to be connected by an actuating element, the tool holder and the carrier for cooperating elements of contact parts have axial position determination, while an actuator is provided in the carrier for setting the actuating element.
  • the actuator can be designed in the form of a pressure pin which is actuated with an actuating ball.
  • the EP 0 322 617 A2 relates to a hydraulic clamping device in which a piston is guided with guide means in a hydraulic cylinder.
  • the DE 20 2016 001 906 U1 relates to a device for clamping and centering a bore within a workpiece.
  • the JP 2014 030 892 A relates to a clamping device having a plurality of grippers which can be brought into engagement with the inner surface of a hole of a workpiece.
  • the EP 0 913 588 A2 relates to a clamping unit which has a push rod with balls for fixing a workpiece.
  • the DE 103 38 850 A1 relates to a clamping mandrel for the internal clamping of workpieces, for example gearwheels, the clamping mandrel having a clamping cylinder with clamping elements designed to be radially adjustable in the clamping cylinder and a loading unit for the clamping elements.
  • the loading unit have an adjusting device based on piezo elements.
  • the U.S. 5,746,436 A relates to a compressed air operated clamping device.
  • a head that can be moved in the axial direction deflects swiveling clamping elements for carrying out clamping processes.
  • the invention is based on the object of providing a clamping system by means of which an efficient and reproducible clamping of a blank is made possible.
  • the invention relates to a clamping system for clamping a blank, with an arrangement of at least three clamping elements which can be moved between a release position and a clamping position by means of an adjusting element.
  • the clamping elements are disengaged in the release position and in engagement with a contact surface of a receptacle of the tubular part in the clamping position.
  • the clamping elements are coupled to the adjusting element via a spherical compensating element, so that when the adjusting element moves into a clamping position, the spherical compensating element executes a compensating movement through which the clamping elements are uniformly guided against the contact surface of the receptacle.
  • the clamping elements are mounted on swivel bearings.
  • the clamping system according to the invention can be used for clamping unmachined parts of different designs.
  • the raw parts are in particular formed from cast parts which typically consist of metallic materials. Furthermore, the raw parts can also be formed from welded structures, burn-out parts and the like.
  • An essential advantage of the invention is that at least one receptacle is provided on the blank, which is provided on a side wall, in particular on the underside of the blank.
  • the blank with this side wall can be set up on a base and the clamping system can then be brought up to the blank from the underside of the base in order to clamp it.
  • several receptacles can also be provided on the side wall of the blank, so that the blank can be fixed to the base with several clamping systems. This ensures that the upper side of the blank to be machined remains free, so that the clamping system or systems do not result in any restrictions whatsoever for the machining of the blank.
  • Another essential advantage of the invention is that the clamping system according to the invention enables automated machining of the blank.
  • clamping processes can be carried out automatically with the clamping system (s) themselves.
  • the clamping system is particularly advantageously actuated by means of a pneumatic system.
  • electrical or hydraulic actuation means can also be provided; in the simplest case, mechanical actuation means are provided.
  • the clamping process is thus carried out in an automated manner in that the adjusting element is moved into a clamping position, preferably with a pneumatic unit, whereby the clamping elements are moved into their clamping position in which they are in engagement with the contact surface of the receptacle and thus hold the blank in its target position.
  • the clamping elements are also released from the contact surface automatically and automatically.
  • the adjusting element is moved from the clamping position into a release position.
  • the clamping elements are automatically released from the contact surface of the receptacle.
  • This release process is preferably supported by spring elements which exert corresponding restoring forces on the tensioning elements.
  • Another essential advantage of the clamping system according to the invention is that it can be used to clamp the blank in a reproducible, safe and highly accurate manner. Precise clamping of this kind is generally not trivial because raw parts, especially cast parts, have considerable tolerances in terms of their dimensions. Of course, this also applies to the recording as part of this blank.
  • this fact is taken into account in that the individual tensioning elements do not carry out fixed, predetermined relative movements in order to carry out the tensioning process. If this were the case, tolerance-related irregularities in the geometry of the receptacle could result in only some, but not all, of the clamping elements being firmly in engagement with the contact surface when the clamping elements are moved and thus not all clamping elements contribute to the clamping process.
  • this problem is solved in a surprisingly simple manner in that the tensioning elements are coupled to the adjusting element via a spherical compensating element, the adjusting element being movably arranged on a support surface of the adjusting element.
  • the individual clamping elements are no longer rigidly coupled to one another and also not rigidly coupled to the adjusting element.
  • the clamping elements individually carry out compensating movements when it is introduced into the clamping position, with these compensating movements ensuring that all clamping elements are pressed evenly and thus with essentially the same pressing forces against the contact surface when the adjusting element is retracted into the clamping position and is the clamping elements are in their clamping positions.
  • This compensating movement generally takes place in that when a tensioning element is guided against the contact surface, the tensioning element exerts a counterforce on the spherical compensating element, whereby it is moved in the direction of the other tensioning elements that are not yet in contact with the contact surface.
  • the clamping elements are synchronized in such a way that when the adjusting element is moved, the clamping elements are guided against the contact surface with the same contact pressures.
  • a uniform clamping process can be implemented particularly well in that the clamping elements are of identical design.
  • the clamping elements are mounted on pivot bearings.
  • Each tensioning element has a tip at its front end which, in the tensioning position of the tensioning element, is guided against the contact surface of the receptacle.
  • the adjusting element can be displaced in its longitudinal direction.
  • the axes of the pivot mounting of the clamping elements are oriented perpendicular to the longitudinal axis of the adjusting element.
  • the linear movement of the adjusting element is thus deflected into the pivoting movement of the clamping elements.
  • This implementation takes place via the spherical compensation element, which is movable on the support surface.
  • the support surface is advantageously formed by an end face of the adjusting element.
  • the bearing surface is expediently a flat surface and the diameter of the bearing surface is adapted to the diameter of the spherical compensating element.
  • the pivoting movements of the clamping elements and the geometries of the tips of the clamping elements are particularly advantageously adapted and optimized so that the clamped blank lies against a contact surface and that the clamping elements moved into individual clamping positions exert a force on the workpiece in the direction of the contact surface.
  • the receptacle is formed by a recess of the workpiece that opens out on a side wall, the traveling segment of the workpiece delimiting the recess forming the contact surface.
  • the recess advantageously has a circular cross section, that is to say the receptacle is designed as a hollow cylinder.
  • the clamping elements are introduced into the cavity of the receptacle from the inside, the tips of the clamping elements then being pivoted outward and thus being guided against the contact surface of the receptacle.
  • the tensioning elements can be coupled directly to the adjusting element via the spherical compensating element.
  • the outer contours of the clamping elements are advantageously adapted to the spherical compensating element so that the contact of the clamping elements with the spherical compensating element, the clamping elements are transferred to their clamping position when the adjusting element is moved into the clamping position.
  • This provides a particularly simple mechanism for actuating the tensioning elements.
  • the receptacle is formed by a pin protruding from a side wall of the workpiece, the jacket surface of the pin forming the contact surface.
  • the pin advantageously has a circular cross section, that is to say the pin has a cylindrical shape.
  • the clamping elements must be brought up to the pin forming the receptacle from the outside.
  • each tensioning element is coupled to the spherical compensating element via a deflecting element.
  • the outer contours of the deflecting elements are appropriately adapted to the spherical compensating element in such a way that the contact of the spherical compensating element with the deflecting element causes a deflection movement with which the clamping elements coupled to the deflecting elements are transferred to their clamping position when the adjusting element is moved into the clamping position.
  • the linear movement of the adjusting element is thus easily converted into pivoting movements of the clamping elements, so that these are guided from the outside against the lateral surface of the pin.
  • the clamping elements when the adjusting element is moved from the clamping position into a release position, the clamping elements are transferred into their release position by forced guidance of the clamping elements on the adjusting element and by restoring forces exerted by spring elements.
  • FIGS. 2 - 6 show a first exemplary embodiment of a clamping unit 1 for clamping a blank, which in the present case is formed by a cast part 2.
  • the blank clamped with the clamping unit 1 can be processed in a suitable manner.
  • the clamping unit 1 has two essentially identically designed clamping systems 5. Depending on the design of the cast part 2 to be clamped, more than two clamping systems 5 or only one clamping system 5 can be provided.
  • the cast part 2 is clamped with the clamping systems 5, with receptacles being provided on the underside of the cast part 2 for this purpose.
  • the clamping systems 5 themselves are fastened to a base, not shown, such as a clamping plate 3.
  • Each clamping system 5 sits on a base 5a, fastened with screws 6.
  • a height compensation for adaptation to the contour of the underside of the cast part 2 can take place by means of different bases 5a or similar compensation segments.
  • Each clamping system 5 has an upper part 7 and a lower part 8, which are fixed to one another with further screws 9.
  • each clamping system 5 has an adjusting element 10 which can be displaced in its longitudinal direction by means of a pneumatic unit (not shown). Corresponding pneumatic connections 11 are provided for connection to the pneumatic unit.
  • the adjusting element 10 is formed by an elongated, essentially cylindrical part, the adjusting element 10 being mounted displaced along its longitudinal axis.
  • the upper end face 10a of the adjustment element 10 forms a flat support surface.
  • a spherical compensating element 12 is movably mounted on this support surface.
  • the spherical compensating element 12 consists of a solid ball, the diameter of which is adapted to the diameter of the adjusting element 10.
  • the adjusting element 10 and the spherical compensating element 12 are assigned three identically designed clamping elements 13.
  • cylindrical shaft segments 14 open out, which form a pivot axis on which the clamping element 13 is pivotably mounted.
  • the shaft segments 14 of the clamping elements 13 are each mounted in corresponding rotary bearings, half of which are formed by a segment of the upper part 7 and a segment of the lower part 8, as from the Figures 4 and 5 evident.
  • the pivot axes of the clamping elements 13 run perpendicular to the longitudinal axis of the adjusting element 10.
  • a tip 13a protruding transversely from its base body is provided at the upper end of a tensioning element 13. The tip 13a is used to fix it in the receptacle of the cast part 2.
  • the receptacles consist of recesses 15 which open out on the underside of the cast part 2.
  • the recesses 15 have a circular cross section which is constant over the entire height of the respective recess 15.
  • the recess 15 can also be designed to be slightly conical. It is also not essential to provide a circular cross-section.
  • the recesses 15 are delimited by a cylindrical base surface of the cast part 2, which form a contact surface 16.
  • each tensioning element 13 is supported on a spring element 17 which is mounted in the lower part 8.
  • each tensioning element 13 has a curvature on a side facing the adjusting element 10.
  • the adjusting element 10 has a notch 10b which forms a stop for the lower edge of the respective tensioning element 13.
  • the adjusting element 10 is moved out of its longitudinal direction by means of the pneumatic unit Figure 4 shown release position in its in Figure 5 shown clamping position retracted.
  • the clamping elements 13 are pivoted into their release position by the restoring forces of the spring elements 17.
  • the clamping elements 13 are pivoted in the direction of the adjusting element 10 in such a way that their tips 13a do not protrude beyond the side surface of the upper part 7.
  • the upper part 7 of the clamping system 5 can be easily inserted into the recess 15.
  • the pivoting movements of the clamping elements 13 are predetermined by the curvatures of the individual clamping elements 13.
  • the spherical compensating element 12 Since the spherical compensating element 12 is freely movable on the support surface of the adjusting element 10 and the spherical compensating element 12 is only coupled to the tensioning element 13 by contacting the curved or inclined side surfaces, the spherical compensating element 12 can be oriented perpendicular to the longitudinal axis of the adjusting element 10 Carry out a corresponding compensation movement on the level on the support surface. If a clamping element 13 with a tip 13a then comes into contact with the contact surface 16, the counterforce exerted thereby moves the spherical compensating element 12 in the opposite direction, whereby the other clamping elements 13 with their tips 13a are increasingly guided against the contact surface 16.
  • FIG. 5 shows the clamping element 13 in its clamping position and the adjusting element 10 in its clamping position. In this clamping position, the front edge of a clamping element 13 rests against the stop formed by the notch 10b of the adjusting elements 10.
  • the tips 13a of the clamping elements 13 are advantageously designed in such a way that when the syringes of the contact surface 16 are pressed, a force is exerted downwards and thus against the contact surface of the clamping system 5, which further improves the hold of the cast part 2 by the clamping system 5.
  • the adjusting element 10 with the pneumatic unit is safely moved into the release position so that the tips 13a of the clamping elements 13 are pivoted into the upper part 7 by the restoring forces of the spring elements 17 and also by a forced guidance of the clamping elements 13 on the adjusting element 10, until the clamping elements 13 in the in Figure 4 shown release position.
  • the cast part 2 can thus be released from the clamping system 5.
  • the Figures 6 - 9 show a second exemplary embodiment of the clamping unit 1 according to the invention.
  • the receptacles of the cast part 2 consist of pegs 18 which protrude from its underside.
  • the pins 18 have a circular cross section that is constant over their height. In general, other cross-sectional shapes are also possible, with the cross-section generally not having to be constant even over the height.
  • the cylindrical outer jacket surface of a pin 18 forms the contact surface 16.
  • the pins 18 serve as receptacles only for fastening the cast part 2 and can be removed therefrom after the cast part 2 has been processed.
  • the spherical compensating element 12 is in turn movably supported on the front end face 10a of the adjusting element 10, which face forms a flat support surface.
  • the adjusting element 10 is not in contact with deflection elements 19 via the spherical compensating element 12, a deflection element 19 in each case being connected to a tensioning element 13.
  • Each deflecting element 19 is mounted displaceably in the horizontal direction in the lower part 8, that is to say the deflecting elements 19 can perform translational movements perpendicular to the longitudinal axis of the adjusting element 10.
  • the first longitudinal end of a deflecting element 19 is delimited by an inclined surface 19 a, which rests on the spherical compensating element 12.
  • the other longitudinal end rests laterally on the clamping element 13 in the area below the pivot axis.
  • each tensioning element 13 rests against a ball element 20, which rests on the spring element 17 exerting the restoring force, the spring element 17 being positively guided in a recess in the lower part 8.
  • Figure 8 shows the adjustment element 10 in its release position, that is, in its lower limit position.
  • the spherical compensating element 12 has moved down so far that it rests in the lower region of the inclined surface 19a of the deflecting elements 19.
  • the clamping elements 13 are pivoted back into the area of the upper part 7 and held there by the restoring forces of the spring elements 17.
  • the pin 18 can be inserted into the area of the upper part 7 with the clamping elements 13, this area being designed in the form of a recess which opens out on the upper side of the upper part 7.
  • the diameter of this recess is adapted to the outer diameter of the pin 18, so that the pin 18 lies in the recess of the upper part 7 with little play.
  • the pneumatic unit moves the adjusting element 10 from the release position into the clamping position.
  • the spherical compensating element 12 is pushed upwards and slides along the inclined surfaces 19a of the deflecting elements 19.
  • the contact pressure exerted by the adjusting element 10 via the spherical compensating element 12 moves the deflecting elements 19 outward.
  • the clamping elements 13 are pivoted against the restoring forces of the spring elements 17 and the tips 13a of the clamping elements 13 are guided against the contact surface 16 of the pin 18.
  • the tips 13a of the clamping elements 13 point slightly downwards again, so that the cast part 2 with the respective pins 18 is guided into the recess of the upper part 7 of the clamping system 5 through the clamping process, which further improves the hold of the cast part 2 on the clamping system 5 will.
  • the pneumatic unit moves the adjusting element 10 back into the release position, whereby the clamping elements 13 are transferred to their release position and are held there with the spring elements 17 ( Figure 8 ).
  • the pin 18 of the cast part 2 can be pulled out of the recess in the upper part 7 of the clamping system 5.

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

Claims (14)

  1. Système de serrage (5) dévolu à l'ablocage d'une pièce brute, muni d'un ensemble comptant au moins trois éléments de serrage (13) mobiles, au moyen d'un élément de réglage (10), entre une position de libération et une position d'ablocage, sachant que, dans ladite position de libération et dans ladite position d'ablocage, les éléments de serrage (13) sont respectivement hors prise, et en prise avec une surface de contact (16) d'un réceptacle de la pièce brute, lesdits éléments de serrage (13) étant couplés audit élément de réglage (10) par l'intermédiaire d'un élément compensateur sphérique (12), lequel élément compensateur sphérique (12) est monté avec mobilité sur une surface d'appui de l'élément de réglage (10) de façon telle que, lors d'un mouvement dudit élément de réglage (10) vers un emplacement d'ablocage, ledit élément compensateur sphérique (12) accomplisse un mouvement de compensation par lequel les éléments de serrage (13) sont guidés uniformément contre la surface de contact (16) du réceptacle, caractérisé par le fait que les éléments de serrage (13) sont montés sur des paliers de pivotement.
  2. Système de serrage (5) selon la revendication 1, caractérisé par le fait que les éléments de serrage (13) sont de réalisations identiques.
  3. Système de serrage (5) selon l'une des revendications 1 ou 2, caractérisé par le fait que chaque élément de serrage (13) est pourvu, à son extrémité antérieure, d'une pointe (13a) qui est guidée contre la surface de contact (16) du réceptacle dans la position d'ablocage dudit élément de serrage (13).
  4. Système de serrage (5) selon l'une des revendications 1-3, caractérisé par le fait que la surface d'appui est formée par une face d'extrémité (10a) de l'élément de réglage (10).
  5. Système de serrage (5) selon la revendication 4, caractérisé par le fait que le diamètre de la surface d'appui est adapté au diamètre de l'élément compensateur sphérique (12).
  6. Système de serrage (5) selon l'une des revendications 1-5, caractérisé par le fait que l'élément de réglage (10) peut être déplacé dans sa direction longitudinale.
  7. Système de serrage (5) selon la revendication 6, caractérisé par le fait que les axes des paliers de pivotement des éléments de serrage (13) sont orientés perpendiculairement à l'axe longitudinal de l'élément de réglage (10).
  8. Système de serrage (5) selon l'une des revendications 1-7, caractérisé par le fait que la pièce brute abloquée est en applique contre une surface d'adossement ; et par le fait qu'une force est exercée sur la pièce, dans la direction de ladite surface d'adossement, par les éléments de serrage (13) rétractés vers leur position d'ablocage.
  9. Système de serrage (5) selon l'une des revendications 1-8, caractérisé par le fait que l'élément de réglage (10) est entraîné pneumatiquement, mécaniquement, hydrauliquement ou électriquement.
  10. Système de serrage (5) selon l'une des revendications 1-9, caractérisé par le fait que, lors d'un mouvement de l'élément de réglage (10) vers un emplacement de libération à partir de l'emplacement d'ablocage, les éléments de serrage (13) sont transférés à leur position de libération sous l'effet d'un guidage forcé desdits éléments de serrage (13) sur ledit élément de réglage (10), et sous l'effet de forces de rappel exercées par des éléments élastiques (17).
  11. Système de serrage (5) selon l'une des revendications 1-10, caractérisé par le fait que le réceptacle est formé par un évidement (15) de la pièce, débouchant au niveau d'une paroi latérale, sachant que le segment de paroi de ladite pièce, qui délimite ledit évidement (15), matérialise la surface de contact (16).
  12. Système de serrage (5) selon la revendication 11 caractérisé par le fait que les éléments de serrage (13) sont couplés directement à l'élément de réglage (10) par l'intermédiaire de l'élément compensateur sphérique (12), les profils extérieurs des éléments de serrage (13) étant adaptés à l'élément compensateur sphérique (12) de façon telle que, suite au contact desdits éléments de serrage (13) avec ledit élément compensateur sphérique (12), lesdits éléments de serrage (13) soient transférés à leur position d'ablocage lors d'un mouvement dudit élément de réglage (10) vers l'emplacement d'ablocage.
  13. Système de serrage (5) selon l'une des revendications 1-10, caractérisé par le fait que le réceptacle est formé par un tenon (18) dépassant au-delà d'une paroi latérale de la pièce, la surface de l'enveloppe dudit tenon (18) matérialisant la surface de contact (16).
  14. Système de serrage (5) selon la revendication 13, caractérisé par le fait que chaque élément de serrage (13) est couplé à l'élément compensateur sphérique (12) par l'intermédiaire d'un élément de déviation (19), les profils extérieurs des éléments de déviation (19) étant adaptés à l'élément compensateur sphérique (12), de façon telle que le contact dudit élément compensateur sphérique (12) avec l'élément de déviation (19) ait pour effet de provoquer un mouvement de réorientation par lequel les éléments de serrage (13), couplés aux éléments de déviation (19), sont transférés à leur position d'ablocage lors d'un mouvement de l'élément de réglage (10) vers l'emplacement d'ablocage.
EP18172783.5A 2017-06-08 2018-05-17 Système de serrage Active EP3412411B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017112664.3A DE102017112664B4 (de) 2017-06-08 2017-06-08 Spannsystem mit wenigstens drei Spannelementen

Publications (2)

Publication Number Publication Date
EP3412411A1 EP3412411A1 (fr) 2018-12-12
EP3412411B1 true EP3412411B1 (fr) 2021-09-22

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EP18172783.5A Active EP3412411B1 (fr) 2017-06-08 2018-05-17 Système de serrage

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DE (1) DE102017112664B4 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1567251A (en) 1976-08-24 1980-05-14 Kennametal Inc Connection arrangements for tool holders
JPH01170532A (ja) * 1987-12-25 1989-07-05 Kosumetsuku:Kk シリンダ形油圧クランプ
US5746436A (en) 1995-07-12 1998-05-05 Coburn Optical Industries, Inc. Air pressurized chuck
JP3954704B2 (ja) * 1997-10-31 2007-08-08 株式会社コスメック クランプ装置
DE10338850B4 (de) 2002-08-21 2014-01-02 Klingelnberg Gmbh Spanndorn
DE102008022826A1 (de) 2008-05-07 2009-11-12 Röhm Gmbh Spannkopf
JP5892897B2 (ja) * 2012-07-31 2016-03-23 株式会社コスメック クランプ装置
DE202016001906U1 (de) 2016-03-22 2016-05-09 Christof Steubing Niederzug-Zentrierspanner

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DE102017112664A1 (de) 2018-12-13
DE102017112664B4 (de) 2021-12-16
EP3412411A1 (fr) 2018-12-12

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