WO2003095132A1 - Dispositif de serrage expansible - Google Patents

Dispositif de serrage expansible Download PDF

Info

Publication number
WO2003095132A1
WO2003095132A1 PCT/EP2003/004874 EP0304874W WO03095132A1 WO 2003095132 A1 WO2003095132 A1 WO 2003095132A1 EP 0304874 W EP0304874 W EP 0304874W WO 03095132 A1 WO03095132 A1 WO 03095132A1
Authority
WO
WIPO (PCT)
Prior art keywords
expansion
pressure chamber
expansion sleeve
base body
clamping ring
Prior art date
Application number
PCT/EP2003/004874
Other languages
German (de)
English (en)
Inventor
Andreas Schuster
Gerhard Michler
Thomas Retzbach
Rainer Sigmund
Original Assignee
Schunk Gmbh & Co. Kg Fabrik Für Spann- Und Greifwerkzeuge
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 Schunk Gmbh & Co. Kg Fabrik Für Spann- Und Greifwerkzeuge filed Critical Schunk Gmbh & Co. Kg Fabrik Für Spann- Und Greifwerkzeuge
Priority to AU2003239856A priority Critical patent/AU2003239856A1/en
Publication of WO2003095132A1 publication Critical patent/WO2003095132A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
    • B23B31/305—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck the gripping means is a deformable sleeve

Definitions

  • the present invention relates to an expansion clamping device with a base body and a thin-walled expansion sleeve provided on an axial end region of the base body, which forms a central receptacle for a component to be tensioned, at least one pressure chamber being provided around the expansion sleeve, in which pressure is built up can to fix a component in the receptacle with elastic deformation of the expansion sleeve.
  • the invention relates to an expansion clamping device with a base body and a thin-walled expansion sleeve provided on an axial end region of the base body, which forms a clamping mandrel, wherein a pressure chamber is provided within the expansion sleeve, in which a pressure can be built up to a component on the outer circumference of the To fix the expansion sleeve with elastic deformation of the expansion sleeve.
  • expansion clamping devices are known in different embodiments and are primarily used to attach a tool shank such as a drill or milling shank to the work spindle appropriate machine tool to fix.
  • expansion clamps designed as chucks are usually used, in which the expansion sleeve is inserted into the base body and is deformed radially inward for the clamping.
  • mandrels are also known, in which the expansion sleeve surrounds the base body and, when pressure is applied, the pressure chamber provided on the inner circumference of the expansion sleeve expands radially outward in order to tension a component on the outer circumference of the expansion sleeve.
  • expansion devices are designed as chucks or mandrels, they can be designed, for example, as steep taper tool holders which can be fixed to the work spindle of the machine tool in question by means of a fastening cone. It is also possible to design the expansion device directly on the work spindle.
  • Expansion chucks of the type mentioned at the beginning are known as chucks, for example from WO 98/39123.
  • the expansion sleeve is inserted into the base body with the formation of an intermediate pressure chamber and is soldered to the base body in order to establish a firm connection to form the pressure chamber.
  • the pressure chamber is connected via corresponding connecting channels to cylinder bores which are formed in the base body and are inserted into the pistons, which can be adjusted axially synchronously by the rotation of a clamping ring in order to be able to move in the cylinder bores and thus also in the pressure Chamber build up a hydraulic pressure and in this way to clamp a tool in the receptacle with elastic deformation of the expansion sleeve.
  • a disadvantage of the known expansion clamping devices is that they are relatively complex to manufacture, since the cylinder bores and channels in the base body have to be produced in complex drilling and milling operations, and it is also necessary to solder the expansion sleeve on the base body or the like to fix.
  • the object of the present invention is therefore to design expansion devices of the type mentioned in such a way that they are simple to manufacture.
  • the above-mentioned object is achieved in that the at least one pressure chamber is formed between the expansion sleeve and a clamping ring inserted into the expansion sleeve and that Volume of the pressure chamber can be changed by axially adjusting the clamping ring.
  • the pressure within the pressure chamber is thus not generated by the piston stroke in separate piston bores as in the prior art, but by a change in the volume of the pressure chamber itself by axially adjusting the clamping ring.
  • This makes it possible to dispense with the separate piston and connecting bores provided in the prior art, so that the expansion clamping devices according to the invention are simple in construction and manufacture.
  • the production is also simplified in that the pressure chambers can be produced in a simple manner by pressure machining on the expansion sleeve and the clamping ring.
  • the clamping ring is screwed to the base body and is axially adjustable by rotation relative to the base body. In this way, a simple connection between the base body and the clamping ring is achieved.
  • the wall sections of the expansion sleeve and the clamping ring delimiting the pressure chambers are designed in such a way that the volume of the pressure chamber is reduced in one direction when the clamping ring is adjusted axially and enlarged in the other direction.
  • the training is expediently carried out in such a way that the lumen of the pressure chamber is reduced and thus the pressure inside the pressure chamber increases the further the clamping ring is moved in the direction of the axial end of the base body opposite the expansion sleeve.
  • a stop is preferably provided which limits the axial adjustment path of the clamping ring in the direction of the axial end of the base body opposite the expansion sleeve and thus defines the maximum achievable pressure within the pressure chamber.
  • This stop can, for example, be predetermined on the base body.
  • the pressure chamber can be filled in a conventional manner with a liquid hydraulic medium such as oil.
  • a liquid hydraulic medium such as oil.
  • sealing elements are provided between the expansion sleeve and the clamping ring, which axially limit the pressure chamber.
  • engagement means for actuating elements such as a roller or hook wrench can be provided on the clamping ring. It is also not necessary to actually design the clamping ring, which engages in the expansion sleeve, in the case of an expansion clamping device designed as a mandrel. It can also consist of a solid material.
  • the expansion device can also be used for a shaft / hub connection. It can also be provided stationary on a workbench or the like.
  • FIG. 1 shows in longitudinal section a first embodiment of an expansion clamping device designed as an expansion chuck according to the present invention in its unactuated state
  • FIG. 2 shows in longitudinal section the expansion chuck from FIG. 1 in the actuated state
  • FIG. 3 shows a longitudinal section of an alternative embodiment of an expansion chuck according to the invention, in which the pressure chamber is filled with a solid
  • Figure 4 shows in longitudinal section an embodiment of a stretching mandrel designed as a mandrel according to the present invention in the unactuated state and
  • FIG. 5 shows the mandrel from FIG. 4 in the actuated state.
  • the expansion chuck 1 comprises a base body 2 made of a dimensionally stable material which, in its end region on the left in the drawing, has, in a manner known per se, a fastening cone 3 for clamping on a rotary driven work spindle of a machine tool.
  • a thin-walled expansion sleeve 4 is provided, which is formed here in one piece with the base body 2, but alternatively can also be a separate component which is firmly connected to the base body 2.
  • the expansion sleeve 4 forms a central receptacle 5 into which a cylindrical shank of a tool such as a drill or milling cutter to be clamped can be inserted.
  • the expansion sleeve 4 is surrounded by a clamping ring 6 designed as a union nut, which is screwed onto the base body 2 at its axial end facing the fastening cone 3, for which purpose on the chuck body 2 and on the Corresponding threaded sections 9a, 9b are formed on the inside of the clamping ring 6.
  • the expansion sleeve 4 and the clamping ring 6 form between them a pressure chamber 7 which is filled with a liquid hydraulic medium such as oil and is axially delimited by two sealing rings 8 which are held in the clamping ring 6.
  • the pressure within the pressure chamber 7 can be changed by an axial adjustment of the clamping ring 6 relative to the base body 2.
  • the wall sections of the expansion sleeve 4 and the clamping ring 6, which delimit the pressure chamber 7, are designed in such a way that the volume of the pressure chamber 7 changes when the clamping ring 6 is adjusted axially.
  • the arrangement is such that in the right end position of the clamping ring 6 shown in FIG. 1, the volume of the pressure chamber 7 is greatest and thus the lowest pressure prevails in the pressure chamber, and in the left end position of the clamping ring 6 shown in FIG. 2, in which the clamping ring 6 rests against an axial stop 10 of the base body 2, the volume of the pressure chamber 7 is the smallest and thus the greatest pressure prevails in the pressure chamber 7.
  • the axial adjustment of the clamping ring 6 is effected by the clamping ring is further screwed 6 from the position shown in Figure 1 'position on the base body 2 and is unscrewed from the position shown in figure 2 the clamping position of the main body 2 again.
  • the clamping ring 6 is first brought into the right end position shown in FIG. 1, in which the volume of the pressure chamber 1 is greatest and there is only a low pressure in the pressure chamber 7. After inserting, for example, a drill shaft into the receptacle 5, the clamping ring 6 is screwed further onto the base body 2 until it comes into contact with the stop 10. The volume of the pressure chamber 7 is thereby reduced, as a result of which the chamber pressure increases to such an extent that the thin-walled expansion sleeve 4 deforms radially inwards and tightens the drill shaft.
  • FIG. 3 shows an alternative expansion chuck 1 which basically has the same structure as the expansion chuck 1 shown in FIGS. 1 and 2.
  • the expansion sleeve 4 and the clamping ring 6 in the second embodiment shown in FIG. 3 define between them a pressure chamber 7 with an annular cross section, which with four rings 11 made of an elastic solid such as for example rubber instead of a liquid hydraulic fluid. Since there are no sealing problems with such solid rings 11, the sealing rings 8, which are provided in the first embodiment between the expansion sleeve 4 and the clamping ring 6, are missing in order to axially limit the pressure chamber 7. Otherwise, the mode of operation of the expansion chuck 1 shown in FIG. 3 is the same as that of the expansion chuck shown in FIGS.
  • FIGS. 4 and 5 show an embodiment of an expansion clamping device 1 designed as a mandrel in accordance with the present invention.
  • This mandrel 1 has a base body 2, which has on its left end region not shown in the drawing fasteners for attachment to a work spindle, and carries a thin-walled expansion sleeve 4 at its right end.
  • the expansion sleeve 4 and the clamping element 6 define between them an annular pressure chamber 7 which, as in the embodiment shown in FIG. 3, is filled with an elastic solid 11 as hydraulic medium.
  • the left axial end of the pressure chamber 7 is delimited by the chuck body 2, and the right axial end by the clamping element 6, which has an annular web 6a, which rests on the outside of the expansion sleeve 4.
  • Figure 4 shows the mandrel 1 in the state in which the clamping element 6 assumes its right end position and the pressure chamber 7 is essentially depressurized, so that a component to be tensioned can be pushed onto the expansion sleeve 4 on the outside. If the tensioning element is now screwed further into the base body 2 and is adjusted axially to the left into the end position shown in FIG. 5, in which the tensioning element 6 lies against a stop 10 of the base body 2, the volume within the pressure chamber 7 decreases, so that the pressure in the pressure chamber increases and the thin-walled expansion sleeve 4 is elastically deformed radially outward in order to fix the attached component. Conversely, the fixation can be released by unscrewing the tensioning element 6 again from the base body 2 into the right end position shown in FIG.
  • a plurality of bores 12 are provided at its right-hand end on the circumference, into which corresponding tools can be inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Clamps And Clips (AREA)

Abstract

L'invention concerne un dispositif de serrage expansible comprenant une base (2) ainsi qu'un manchon expansible (4) à parois fines qui est disposé au niveau d'une zone terminale axiale de cette base et délimite un logement central (5) destiné à recevoir un composant à serrer. Selon l'invention, au moins une chambre de pression (7) dans laquelle on peut établir une pression est prévue autour du manchon expansible pour fixer un composant dans le logement, par déformation élastique du manchon expansible. L'invention est caractérisée en ce que la/les chambre(s) de pression est/sont ménagée(s) entre le manchon expansible et un anneau de serrage (6) entourant ce manchon expansible, et en ce que le volume de la chambre de pression peut être modifié par réglage axial de cet anneau de serrage.
PCT/EP2003/004874 2002-05-14 2003-05-09 Dispositif de serrage expansible WO2003095132A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003239856A AU2003239856A1 (en) 2002-05-14 2003-05-09 Expansion chucking device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10221507.3 2002-05-14
DE2002121507 DE10221507C1 (de) 2002-05-14 2002-05-14 Dehnspanneinrichtung

Publications (1)

Publication Number Publication Date
WO2003095132A1 true WO2003095132A1 (fr) 2003-11-20

Family

ID=28458961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/004874 WO2003095132A1 (fr) 2002-05-14 2003-05-09 Dispositif de serrage expansible

Country Status (3)

Country Link
AU (1) AU2003239856A1 (fr)
DE (1) DE10221507C1 (fr)
WO (1) WO2003095132A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584389A1 (fr) * 2004-04-06 2005-10-12 Schunk GmbH & Co. KG Spann- und Greiftechnik Dispositif de serrage expansible
CN106312609A (zh) * 2016-11-18 2017-01-11 成都世唯科技有限公司 一种内胀式定位锁紧机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005844B4 (de) * 2010-01-26 2011-11-03 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik Dehnspanneinrichtung
DE102013103168B3 (de) * 2012-12-21 2014-04-17 Franz Haimer Maschinenbau Kg Werkzeughalter mit eingebauten Kavitäten
DE102015005776B4 (de) 2015-05-08 2016-12-08 Leitz Gmbh & Co. Kg Einrichtung zum spielfreien Aufspannen eines Bauteils, insbesondere eines Werkzeugs, und Bauteil zur Verwendung in der Einrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943872C (de) * 1940-08-11 1956-06-01 Daimler Benz Ag Spannvorrichtung, z.B. Spanndorn, Spannfutter oder Wellenkupplung, mit einer ungeschlitzten, elastischen Spannhuelse
DE19525574C1 (de) * 1995-07-13 1996-10-10 Schunk Fritz Gmbh Spannvorrichtung zum genauen gegenseitigen Fixieren zweier Bauteile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29704245U1 (de) * 1997-03-06 1997-06-26 Rinne, Erkki, Kirkkonummi Hydraulische Preßanordnungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943872C (de) * 1940-08-11 1956-06-01 Daimler Benz Ag Spannvorrichtung, z.B. Spanndorn, Spannfutter oder Wellenkupplung, mit einer ungeschlitzten, elastischen Spannhuelse
DE19525574C1 (de) * 1995-07-13 1996-10-10 Schunk Fritz Gmbh Spannvorrichtung zum genauen gegenseitigen Fixieren zweier Bauteile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584389A1 (fr) * 2004-04-06 2005-10-12 Schunk GmbH & Co. KG Spann- und Greiftechnik Dispositif de serrage expansible
WO2005097384A2 (fr) * 2004-04-06 2005-10-20 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik Dispositif de serrage extensible
WO2005097384A3 (fr) * 2004-04-06 2006-02-23 Schunk Gmbh & Co Kg Dispositif de serrage extensible
KR100826271B1 (ko) * 2004-04-06 2008-04-29 슈운크 게엠베하 운트 콤파니 카게 스판-운트 그레이프테크닉 팽창 척킹 장치
CN1942275B (zh) * 2004-04-06 2010-09-08 雄克有限公司 膨胀卡紧装置
CN106312609A (zh) * 2016-11-18 2017-01-11 成都世唯科技有限公司 一种内胀式定位锁紧机构

Also Published As

Publication number Publication date
AU2003239856A1 (en) 2003-11-11
DE10221507C1 (de) 2003-10-23

Similar Documents

Publication Publication Date Title
DE102013217401B3 (de) Spannvorrichtung
EP1529585B1 (fr) Dispositif de serrage expansible
DE69800037T2 (de) Spannfutter
WO2005097384A2 (fr) Dispositif de serrage extensible
EP1602426A1 (fr) Dispositif de serrage pour la fixation avec positionnement précis d'une pince de serrage sur un mandrin
EP1757391B1 (fr) Dispositif de serrage extensible
EP1737594A1 (fr) Mandrin de serrage hydraulique expansible
EP0923421A1 (fr) Mandrin de serrage expansible
EP2906377B1 (fr) Adaptateur d'équilibrage ou de mesure
DE102011053674A1 (de) Spann- oder Greifeinrichtung sowie Betätigungseinrichtung für diese
DE4309321A1 (de) Anordnung zur zentrierten und axial fixierten Aufnahme eines rotierenden Körpers und zugehöriger Adapter
EP2747922A1 (fr) Procédé et dispositif pour fixer une pièce sur une partie de machine rotative
WO2007110213A1 (fr) Dispositif de serrage pour outils ou pièces en rotation
DE19852444A1 (de) Vorrichtung und Spannhülse zum lösbaren Halten eines Werkzeuges
EP2314403B1 (fr) Dispositif de tension
EP2879824A1 (fr) Adaptateur d'équilibrage ou de mesurage
DE10221507C1 (de) Dehnspanneinrichtung
WO1998022246A1 (fr) Dispositif de serrage
DE3805527A1 (de) Werkzeugwechselsystem
DE102006007817B4 (de) Vorrichtung zur Drehmitnahme eines zwischen Zentrierspitzen gespannten Werkstücks
EP3658319B1 (fr) Outil d'usinage par enlèvement de copeaux et procédé pour l'usinage d'une roulement d'un palier
DE102014220933B4 (de) Werkzeug zur spanenden Bearbeitung von Werkstücken
DE102009011335C5 (de) Vorrichtung zum Einspannen eines eine ringförmige Wandung aufweisenden Werkstückes und Verfahren zum Betreiben einer solchen Vorrichtung
DE19526755A1 (de) Spannvorrichtung
EP1136160A1 (fr) Dispositif de support d' une pièce à usiner

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP