WO2024008237A1 - Système de serrage - Google Patents

Système de serrage Download PDF

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Publication number
WO2024008237A1
WO2024008237A1 PCT/DE2023/100501 DE2023100501W WO2024008237A1 WO 2024008237 A1 WO2024008237 A1 WO 2024008237A1 DE 2023100501 W DE2023100501 W DE 2023100501W WO 2024008237 A1 WO2024008237 A1 WO 2024008237A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
clamping
clamping jaws
recesses
centering clamp
Prior art date
Application number
PCT/DE2023/100501
Other languages
German (de)
English (en)
Inventor
Tobias Ring
Original Assignee
Tobias Ring
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tobias Ring filed Critical Tobias Ring
Publication of WO2024008237A1 publication Critical patent/WO2024008237A1/fr

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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
    • B25B1/00—Vices
    • B25B1/02—Vices with sliding jaws
    • 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
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws
    • B25B1/2473—Construction of the jaws with pull-down action on the workpiece

Definitions

  • the present invention relates to a clamping system which includes a device for embossing defined recesses in a workpiece to be machined, a centering clamp with two clamping jaws and the workpiece clamped therein for machining.
  • EP 2105257 A2 discloses the use of an additional screw connection in the vicinity of clamping surfaces on clamping jaws in addition to a clamping spindle for moving the clamping jaws of the centering clamp.
  • DE 10 2007 008 132 A1 and DE 10 2020 101 059 A1 teach the use of a separately applied marking to identify a preferred position on a workpiece, the workpiece fixed in a centering clamp being fixed in a mounting plate of a respective processing machine via separate foot bolts.
  • a clamping system in which, for clamping a workpiece in a machine vice or Centering clamp a base body, at least two mounted on the base body in a longitudinally displaceable manner and movable with one another via a clamping spindle for adjustment coupled clamping jaws are provided.
  • the clamping jaws have form-fitting or Intervention elements in the form of projections or Teeth occupied, which protrude from corresponding contact surfaces of the clamping jaws.
  • complementary recesses are stamped into the workpiece to be clamped for machining using an embossing device, which subsequently serve as coupling elements by engaging elements of the clamping jaws of the centering clamp in these recesses.
  • the clamping system thus causes a mixed frictional and positive fixation of the workpiece, which enables the transmission of large holding forces with a small space requirement on the workpiece and on the clamping elements.
  • DE 20 2020 100 356 U1 teaches that the engagement element should be designed to engage the recess in the manner of a wedge by generating a force directed in the workpiece onto a support surface of the clamping system. This force always presses the workpiece onto a defined contact surface under the influence of the clamping system. In addition to a defined and reproducible positioning of the workpiece in the clamping system, this prevents undefined lifting of the workpiece. The tendency of the workpiece to vibrate during machining is also reduced.
  • the present invention has the task of further developing a clamping system with more than one engaging element in terms of its reliability during machining of a workpiece under high mechanical stress.
  • This object is achieved according to the invention by the features of claim 1 in that on each clamping jaw a series of engagement elements, which are designed in accordance with the teaching of DE 20 2020 100 356 Ul, a further row of engagement elements at a distance in parallel is arranged.
  • a workpiece is provided with corresponding depressions by plastic deformation in an embossing device with embossing teeth in areas that are intended for clamping in a centering clamp during machining, which are now also arranged in two rows according to the present invention.
  • the embossing teeth of the embossing device and the engagement elements of the centering clamp are positioned as parts of the clamping system in such a way that they are coordinated with one another relative to the workpiece, so that in the case of positive and force-fitting engagement of the engagement elements, for example.
  • a height offset of the recesses in the workpiece compared to the engaging elements causes a pull-down effect, through which the workpiece is placed in a defined manner on a base or Support surface is pressed.
  • the advantage of the new clamping system compared to that according to DE 20 2020 100 356 U1 is that a maximum moment, as is caused in the course of machining on a workpiece in question, is now significantly increased. The reason is that the lever conditions on the workpiece are improved by the second row of engaging elements arranged at a distance and parallel to a first row of engaging elements and their distance from the first row of engaging elements, as will be discussed below an exemplary embodiment is described in detail.
  • the two rows of engagement elements are each Clamping jaws against each other approx. 6 mm to about 7 mm offset.
  • the bottom row of engaging elements of the respective clamping jaws preferably approx. 3 mm above a lower edge of the clamped workpiece results in an area of approx. 10 mm height that is required on a workpiece for recesses in order to form a compact clamping system with significantly improved properties using a centering clamp described above.
  • the engaging elements of the rows are arranged aligned with one another.
  • a centering clamp described above can in principle also be provided for preparing a workpiece in the function of an embossing device.
  • it is advantageous to provide a separate embossing device the structure of which essentially corresponds to the centering clamp mentioned, but here clamping jaws with two mutually parallel rows of engaging elements are provided, which are opposite the rows of clamping jaws of the centering clamp Height offset by approx. + 1/10 mm compared to a contact surface of the workpiece. This results in recesses on each workpiece after it has been inserted into the centering clamp, in which not only an exact and reproducible alignment but also a pull-down force is created.
  • hydraulics are also provided in the embossing device instead of the clamping spindle of the centering clamp. In this step of embossing, as part of prefabrication, high forces are conveniently and quickly applied to emboss predetermined depressions in the workpiece.
  • clamping jaws are designed to be replaceable as highly stressed wearing parts. The applies to the centering clamp as well as to the embossing device.
  • Figure 1 a three-dimensional view of an exemplary embodiment of a centering clamp
  • Figure 2 a side view of the centering clamp from Figure 1;
  • Figures 3a and 3b a detail of Figure 2 and an enlarged representation of a sectional view of the engagement elements of the clamping jaws of the centering clamp that engage in recesses in the workpiece;
  • Figure 4 a side view of an application of the clamping system
  • Figure 5 a partially sectioned representation of an engagement of an engagement element in a recess of the workpiece with an indication of relevant forces
  • Figure 6 a three-dimensional view of a known centering clamp.
  • Figure 6 represents a three-dimensional view of a known clamping system 1 with a centering clamp 2 according to the teaching of DE 20 2020 100 356 Ul.
  • a clamping jaws 3 which are coupled to one another for adjustment via a clamping spindle 4 and are displaceably mounted on a web 5 of a base body 6, a workpiece 7 - not shown here for reasons of clarity - is fixed, generating forces A directed towards support surfaces 8 , as will be explained in detail below using the illustration in FIG. 5.
  • the centering clamp 2 and the workpiece 7 prepared accordingly by embossing recesses 10 together form the clamping system 1, which has fundamentally proven itself in 5-axis machining with material removal, especially under high mechanical loads.
  • Figure 5 shows an enlargement of Figure 6 in a sectional view to illustrate the generation of a force A directed towards a support surface 8 in the course of fixing the workpiece 7 in the centering clamp 2.
  • an engagement element 9 is provided at a free end of a clamping jaw 3 of the centering clamp 2, which is opposite the support surface 8 of the centering clamp 2, and protrudes there.
  • the engagement element 9 on the clamping jaw 3 engages in a recess 10 in the workpiece 7 a.
  • a flank 11 is formed on the engagement element 9 and/or the recess 10, which has an angle a relative to a force F that lies between 0° and 90°, but preferably between 30° and 60°.
  • this angle a is approximately 45°. So that the force F can act undisturbed on the workpiece 7, the engagement element 9 is designed in coordination with the recess 10 so that in the situation shown it has multi-surface recesses 12 in contact with the recess 10 of the workpiece 7. In these recesses 12, the engagement element 9 is not in contact with the workpiece 7, so that no force transmission takes place here. In an ideal case, the engagement element 9 is in contact with the workpiece 7 only via the flank 11 in the recess 10.
  • FIG. 1 and 2 now show a three-dimensional view of an exemplary embodiment of a novel centering clamp 2 with a side view, from which a two-line arrangement of engagement elements 9, which are designed according to the teaching of DE 20 2020 100 356 Ul, in a lower row of teeth 14 and an upper row of teeth 15 can be seen on the mirror-symmetrically constructed clamping jaws 3 of the centering clamp 2.
  • the engagement elements 9 of the two rows 14, 15 are arranged in alignment with one another.
  • Figure 3a shows a detail A of Figure 2, indicating a dimension according to a preferred exemplary embodiment of the present invention. Accordingly, the rows 14, 15 of engagement elements 9 on the clamping jaws 3 run parallel to one another at a distance of approx. 6 mm arranged.
  • FIG. 3b shows an enlarged view of a sectional view of engagement elements 9 of the clamping jaws 3 of the centering clamp 2 engaging in recesses 10 of the workpiece 7.
  • FIG 4 shows a side view of a corresponding application of the clamping system 1, of which Figure 3b shows an enlarged detail.
  • FIG. 4 shows a case in which a workpiece 7 has not been prepared precisely enough, e.g. B. due to an imprecise embossing of the recesses 10 in the workpiece 7 or here a deviation Z from a predetermined external geometry of the workpiece 7.
  • the workpiece 7 does not rest on the support surface 8 even after it has been clamped, as is the case, for example. B.
  • the engaging elements 9 of the two rows 14, 15 exert sufficiently high holding forces via the recesses 10 to ensure safe and precise work even at high cutting and/or feed speeds when machining the workpiece 7 with a correspondingly large moment load to be able to guarantee.
  • the rows 14, 15 of intervention elements 9 also ensure exact and reproducible positioning of the device with the accuracy or Workpiece 7 with quality defects in the centering clamp 2.
  • a separate embossing device (not shown in the drawing) is basically provided as part of the clamping system 1.
  • the structure of the embossing device essentially corresponds to that of the centering clamp 2. So here too, clamping jaws 3 are installed with two parallel to each other at a predetermined distance of approx. 6 mm rows 14, 15 of engagement elements 9 are used.
  • the embossing device has a height offset of approx. + 1 / 10 mm compared to one
  • Support surface 8 of the workpiece 7 is set. This Height offset serves to generate the pull-down effect described above on both rows of teeth 14, 15 when clamping the workpiece 7 in the centering clamp 2.
  • the geometries of the rows of teeth 14, 15 of the clamping jaws 3 of the centering clamp 2 and of the embossing device are essentially identical.
  • clamping spindle 4 in the figures in FIGS. 1, 2, 4 is also replaced by a hydraulic system.
  • high forces can be applied conveniently and quickly to emboss the recess 10 in the workpiece 7.
  • the clamping jaws 3 of at least the centering clamp 2 are designed to be replaceable in one exemplary embodiment.
  • a height offset of approx. + 1 / 10 mm according to modified clamping or Embossing jaws of the embossing device are provided.
  • this height offset is realized in an exemplary embodiment not shown further by a targeted lowering of the support surfaces 8 of the embossing jaws 3. Since the respective engagement elements 9 are subjected to high mechanical stress, they are subject to increased wear and must therefore be easy and quick to replace.
  • FIGS. 1, 2 and 4 show a very compact and low-profile centering clamp 2.
  • This centering clamp 2 enables precise and process-reliable repeatable positioning with a small space requirement on a workpiece itself, allowing machining of workpieces of maximum size while maintaining the required minimum tool travel distances. Due to the advantages mentioned, such clamping systems 1 have a wide range of uses in machining production. Reference symbol list is te

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

Abstract

L'invention concerne un système de serrage (1) comprenant un dispositif pour estamper des évidements définis dans une pièce à traiter, un moyen de serrage de centrage (2) avec deux mâchoires de serrage (3), et la pièce serrée à l'intérieur pour le traitement, chacune des mâchoires de serrage (3), qui peut être déplacée par l'intermédiaire d'une broche de serrage (4), étant pourvue d'éléments de mise en prise (9), agencés en une rangée, sous la forme de saillies ou de dents, qui font saillie à partir de surfaces de contact correspondantes des mâchoires de serrage (3), et la pièce (7) ayant des évidements complémentaires (10), les éléments de mise en prise (9) sur les mâchoires de serrage (2) et les évidements (10) sur la pièce (7) étant conçus et positionnés en alignement les uns avec les autres, de telle sorte que les éléments de mise en prise (9) sont conçus pour venir en prise dans les évidements (10) comme un coin, générant une force (A) dans la pièce (7) dirigée vers une surface de contact (8) des mâchoires de serrage (3). Afin de développer un système de serrage, avec plus d'un élément de mise en prise, en termes de sa fiabilité dans l'usinage par enlèvement de matière d'une pièce sous une contrainte mécanique élevée, selon l'invention, une autre rangée (15) d'éléments de mise en prise (9) est disposée sur chaque mâchoire de serrage (3) espacée de et en parallèle avec une première rangée (14) d'éléments de mise en prise (9).
PCT/DE2023/100501 2022-07-05 2023-07-03 Système de serrage WO2024008237A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202022103760.4 2022-07-05
DE202022103760.4U DE202022103760U1 (de) 2022-07-05 2022-07-05 Spannsystem

Publications (1)

Publication Number Publication Date
WO2024008237A1 true WO2024008237A1 (fr) 2024-01-11

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ID=87517357

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Application Number Title Priority Date Filing Date
PCT/DE2023/100501 WO2024008237A1 (fr) 2022-07-05 2023-07-03 Système de serrage

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DE (1) DE202022103760U1 (fr)
WO (1) WO2024008237A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008132A1 (de) 2007-02-19 2008-08-21 Lang Technik Gmbh Spannverfahren mit Nutzung einer Nullmarkierung
EP2105257A2 (fr) 2008-03-28 2009-09-30 Hemo-Werkzeugbau Dieter Mosig Mâchoire de serrage à chapiteau
DE202014104201U1 (de) 2014-09-05 2015-12-09 Jochen Eggert Führung eines Schnellspannsystems
DE102014112845A1 (de) 2014-09-05 2016-03-10 Jochen Eggert Spannbacken-Schnellverschluss, insbesondere eines Nullpunkt-Spannsystems
DE202020100356U1 (de) 2020-01-23 2021-04-26 Tobias Ring Eingriffselement und Spannsystem
DE102020101059A1 (de) 2020-01-17 2021-07-22 Lang Technik Gmbh Spannvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008132A1 (de) 2007-02-19 2008-08-21 Lang Technik Gmbh Spannverfahren mit Nutzung einer Nullmarkierung
EP2105257A2 (fr) 2008-03-28 2009-09-30 Hemo-Werkzeugbau Dieter Mosig Mâchoire de serrage à chapiteau
DE202014104201U1 (de) 2014-09-05 2015-12-09 Jochen Eggert Führung eines Schnellspannsystems
DE102014112845A1 (de) 2014-09-05 2016-03-10 Jochen Eggert Spannbacken-Schnellverschluss, insbesondere eines Nullpunkt-Spannsystems
DE102020101059A1 (de) 2020-01-17 2021-07-22 Lang Technik Gmbh Spannvorrichtung
DE202020100356U1 (de) 2020-01-23 2021-04-26 Tobias Ring Eingriffselement und Spannsystem

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Publication number Publication date
DE202022103760U1 (de) 2023-10-09

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