EP1778428A1 - Arbour for milling cutter - Google Patents

Arbour for milling cutter

Info

Publication number
EP1778428A1
EP1778428A1 EP05793053A EP05793053A EP1778428A1 EP 1778428 A1 EP1778428 A1 EP 1778428A1 EP 05793053 A EP05793053 A EP 05793053A EP 05793053 A EP05793053 A EP 05793053A EP 1778428 A1 EP1778428 A1 EP 1778428A1
Authority
EP
European Patent Office
Prior art keywords
hub
milling
chamber
cutter
opening
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.)
Withdrawn
Application number
EP05793053A
Other languages
German (de)
French (fr)
Inventor
Hopfner
Alain Freyermuth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
E P B
Original Assignee
E P B
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 E P B filed Critical E P B
Publication of EP1778428A1 publication Critical patent/EP1778428A1/en
Withdrawn legal-status Critical Current

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/26—Securing milling cutters to the driving spindle
    • 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
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
    • 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
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
    • B23B31/1175—Retention by friction only, e.g. using springs, resilient sleeves, tapers using elastomer rings or sleeves
    • B23B31/1176—Retention by friction only, e.g. using springs, resilient sleeves, tapers using elastomer rings or sleeves using fluid-pressure means to actuate the gripping means
    • 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
    • B23B31/40—Expansion mandrels
    • 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
    • B23B31/40—Expansion mandrels
    • B23B31/4006—Gripping the work or tool by a split sleeve
    • B23B31/402—Gripping the work or tool by a split sleeve using fluid-pressure means to actuate the gripping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/26—Securing milling cutters to the driving spindle
    • B23C5/265—Securing milling cutters to the driving spindle by fluid pressure means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/10—Expanding
    • Y10T279/1021—Fluid-pressure actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/308624—Milling with limit means to aid in positioning of cutter bit or work [e.g., gauge, stop, etc.]

Definitions

  • the present invention relates to the field of accessories for machine tools, numerical control, machining centers, cells and flexible workshops and relates to a hydro-expandable milling chuck.
  • the milling tools or milling cutters used on the aforementioned machines are generally in the form of substantially cylindrical elements mounted by means of a bore on a hub of a tool holder and clamped on the latter by means of a screw .
  • the milling mandrel according to the invention consisting of a mounting body on a tool holder and provided with a hub for fixing a milling body, is characterized in that the fixing hub a strawberry body is hydro-expandable.
  • FIG. a side elevational view and partially in section of a milling mandrel according to the invention provided with a milling cutter
  • FIG. 2 is a front elevational view of the mandrel alone
  • FIG. 3 is a sectional view along AA of FIG. 2.
  • FIGS. 1 to 3 of the accompanying drawings represent, by way of example, a milling mandrel consisting of a mounting body 1 on a tool holder and provided with of a hub 2 for fixing a milling body 3.
  • the hub 2 for fixing a mill body 3 is hydro-expandable.
  • the hub 2 has an outer sleeve 4 provided with an annular chamber 4 'with a thin outer wall, this chamber being connected to a means 5 for pressurizing, passing through the body 1.
  • the fluid under pressure is advantageously oil and the supply of this oil under pressure in the annular chamber 4 'of the sleeve 4 has the effect, under the effect of the high pressure of the oil injected into said chamber 4' to cause elastic deformation its outer wall which is thus pressed against the wall of the central bore of the cutter 3.
  • the outer sleeve 4 is an insert attached to the hub 2 by shrinking, soldering or other and the means 5 is advantageously connected to the annular chamber 4 'by means of a bore disposed, in known manner, in the hub 2 and opening through the wall thereof in the annular chamber 4'.
  • the hub 2 of the milling cutter body 1 is advantageously provided, in addition, with longitudinal bores 8 extending parallel to its axis.
  • lubrication channels provided in the body of the cutter 3 to open near the cutting plates 3 'of the latter, these longitudinal channels 8 opening to their other end in a chamber 9 connected to an axial conduit 10 for supplying lubricating liquids.
  • the chamber 9 may, for example, correspond to an obviously made in the body 1 close to the end of the screw 7 for clamping the cutter 3 when the latter is fully tightened. Thanks to the invention, it is possible to make a milling mandrel to obtain a perfect centering of the tool, so that its adjustment can also be performed perfectly and reproducibly without specific adaptation to each tool.
  • the provision of lubrication channels at the periphery of the hub 2 makes it possible to ensure that the front portion of the tool is properly supplied with lubricating fluid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Gripping On Spindles (AREA)
  • Milling Processes (AREA)
  • Jigs For Machine Tools (AREA)
  • Drilling Tools (AREA)

Abstract

The invention relates to a milling cutter arbour which comprises a body (1) for mounting on a tool holder and which is equipped with a hub (2) for fixing a milling cutter (3), said hub (2) being hydraulically extendible. The invention is particularly suitable for use in the field of accessories for machine-tools which are digitally controlled, machining centres, flexible manufacturing systems and cells.

Description

Mandrin porte-fraise Strawberry chuck
La présente invention concerne le domaine des accessoires des machines-outils, à commande numérique, centres d'usinage, cellules et ateliers flexibles et a pour objet un mandrin porte- fraise hydro-expansible.The present invention relates to the field of accessories for machine tools, numerical control, machining centers, cells and flexible workshops and relates to a hydro-expandable milling chuck.
Les outils de fraisage ou fraises utilisés sur les machines susvisées se présentent généralement sous forme d'éléments sensiblement cylindrique montés par l'intermédiaire d'un alésage sur un moyeu de porte- outil et serrés sur ce dernier par l'intermédiaire d'une vis.The milling tools or milling cutters used on the aforementioned machines are generally in the form of substantially cylindrical elements mounted by means of a bore on a hub of a tool holder and clamped on the latter by means of a screw .
Un tel mode de montage des fraises permet un serrage correct de ces dernières. Cependant, du fait de l'augmentation des performances des machines modernes et donc des vitesses de coupes élevées en découlant, la précision du montage de ces outils devient primordiale.Such a mounting mode of the cutters allows a correct tightening of the latter. However, because of the increase in the performance of modern machines and thus the high cutting speeds that result, the precision of the assembly of these tools becomes essential.
En effet, ce montage doit à présent être effectué de parfaitement centrée, ce qui est difficilement compatible avec le mode de centrage par simple ajustement actuellement mis en œuvre. Par ailleurs, on connaît, par US-A-4 387 906, un dispositif de montage et de serrage mettant en œuvre une partie conique, ainsi qu'une pièce intermédiaire pour assurer le centrage. Un tel montage ne permet qu'une précision limitée de l'usinage, une concentricité et un centrage parfaits ne pouvant être assurés. La présente invention a pour but de pallier ces inconvénients en proposant un mandrin porte-fraise permettant un centrage et un serrage parfaits et reproductibleS de l'outil, sans adaptation spécifique lors des changements d'outils.Indeed, this assembly must now be performed perfectly centered, which is hardly compatible with the centering mode by simple adjustment currently implemented. Furthermore, it is known from US-A-4 387 906, a mounting and clamping device implementing a conical portion, and an intermediate piece for centering. Such an assembly allows only a limited precision of the machining, perfect concentricity and centering can not be assured. The present invention aims to overcome these disadvantages by providing a milling mandrel for a perfect centering and perfect clamping and reproducibleS tool without specific adaptation during tool changes.
A cet effet, le mandrin porte-fraise conforme à l'invention, constitué par un corps de montage sur un porte-outil et muni d'un moyeu de fixation d'un corps de fraise, est caractérisé en ce que le moyeu de fixation d'un corps de fraise est hydro-expansible.For this purpose, the milling mandrel according to the invention, consisting of a mounting body on a tool holder and provided with a hub for fixing a milling body, is characterized in that the fixing hub a strawberry body is hydro-expandable.
L'invention sera mieux comprise, grâce à la description ci- après, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence aux dessins schématiques annexés, dans lesquels : la figure 1 est une vue en élévation latérale et partiellement en coupe d'un mandrin porte-fraise conforme à l'invention muni d'une fraise ; la figure 2 est une vue en élévation frontale du mandrin seul, et l'The invention will be better understood, thanks to the following description, which relates to a preferred embodiment, given by way of non-limiting example, and explained with reference to the attached schematic drawings, in which: FIG. a side elevational view and partially in section of a milling mandrel according to the invention provided with a milling cutter; FIG. 2 is a front elevational view of the mandrel alone, and the
Ia figure 3 est une vue en coupe suivant A-A de la figure 2. Les figures 1 à 3 des dessins annexés représentent, à titre d'exemple, un mandrin porte- fraise constitué par un corps 1 de montage sur un porte-outil et muni d'un moyeu 2 de fixation d'un corps de fraise 3. Conformément à l'invention le moyeu 2 de fixation d'un corps de fraise 3 est hydro-expansible. A cet effet, le moyeu 2 présente un manchon extérieur 4 pourvu d'une chambre annulaire 4' à paroi extérieure de faible épaisseur, cette chambre étant reliée à un moyen 5 de mise sous pression, traversant le corps 1. Le fluide sous pression est avantageusement de l'huile et l'amenée de cette huile sous pression dans la chambre annulaire 4' du manchon 4 a pour conséquence, sous l'effet de la haute pression de l'huile injectée dans ladite chambre 4' de provoquer une déformation élastique de sa paroi extérieure qui est ainsi plaquée contre la paroi du perçage central de la fraise 3.FIG. 3 is a sectional view along AA of FIG. 2. FIGS. 1 to 3 of the accompanying drawings represent, by way of example, a milling mandrel consisting of a mounting body 1 on a tool holder and provided with of a hub 2 for fixing a milling body 3. According to the invention the hub 2 for fixing a mill body 3 is hydro-expandable. For this purpose, the hub 2 has an outer sleeve 4 provided with an annular chamber 4 'with a thin outer wall, this chamber being connected to a means 5 for pressurizing, passing through the body 1. The fluid under pressure is advantageously oil and the supply of this oil under pressure in the annular chamber 4 'of the sleeve 4 has the effect, under the effect of the high pressure of the oil injected into said chamber 4' to cause elastic deformation its outer wall which is thus pressed against the wall of the central bore of the cutter 3.
Il en résulte, du fait de la répartition uniforme de la pression dans la chambre annulaire 4', une déformation régulière de la paroi extérieure délimitant cette chambre, de sorte qu'est effectué automatiquement le centrage de la fraise 3 sur le moyeu 2 du corps 1. La fraise 3 ayant préalablement été montée sur le moyeu 2 et en chevauchement des entraîneurs du corps 1 avec un léger serrage de maintien par l'intermédiaire de la vis de serrage 7, il suffira, après mise sous pression de la chambre 4' de serrer à force la vis 7 dans le moyeu 2 du corps 1 pour fixer définitivement la fraise 3 sur ledit moyeu 2. De préférence, le manchon extérieur 4 est une pièce rapportée fixée sur le moyeu 2 par frettage, brasage ou autre et le moyen 5 de mise sous pression est avantageusement relié à la chambre annulaire 4' par l'intermédiaire d'un perçage disposé, de manière connue, dans le moyeu 2 et débouchant à travers la paroi de celui-ci dans la chambre annulaire 4'. Selon une autre caractéristique de l'invention et comme le montrent plus particulièrement les figures 2 et 3 des dessins annexés, le moyeu 2 du corps porte-fraise 1 est avantageusement pourvu, en outre, de perçages longitudinaux 8 s'étendant parallèlement à son axe dans le pourtour du moyeu 2 et débouchant sur sa face avant pour communiquer avec des canaux de lubrification non représentés prévus dans le corps de la fraise 3 pour déboucher près des plaquettes de coupe 3' de cette dernière, ces canaux longitudinaux 8 débouchant à leur autre extrémité dans une chambre 9 reliée à un conduit axial 10 d'amenée de liquides de lubrification. La chambre 9 peut, par exemple, correspondre à un évidemment réalisé dans le corps 1 proche de l'extrémité de la vis 7 de serrage de la fraise 3 lorsque cette dernière est serrée à fond. Grâce à l'invention, il est possible de réaliser un mandrin porte- fraise permettant d'obtenir un centrage parfait de l'outil, de sorte que son réglage peut également être effectué de manière parfaite et reproductible sans adaptation spécifique à chaque outil. En outre, la prévision des canaux de lubrification en périphérie du moyeu 2 permet d'assurer une bonne alimentation de la partie avant de l'outil en fluide de lubrification.As a result, due to the uniform distribution of the pressure in the annular chamber 4 ', a regular deformation of the outer wall delimiting this chamber, so that is automatically performed the centering of the cutter 3 on the hub 2 of the body 1. The cutter 3 having previously been mounted on the hub 2 and overlapping the body of the coaches 1 with a slight clamping by means of the clamping screw 7, it will suffice, after pressurizing the chamber 4 ' tightening the screw 7 in the hub 2 of the body 1 to permanently secure the cutter 3 on said hub 2. Preferably, the outer sleeve 4 is an insert attached to the hub 2 by shrinking, soldering or other and the means 5 is advantageously connected to the annular chamber 4 'by means of a bore disposed, in known manner, in the hub 2 and opening through the wall thereof in the annular chamber 4'. According to another characteristic of the invention and as shown more particularly in FIGS. 2 and 3 of the accompanying drawings, the hub 2 of the milling cutter body 1 is advantageously provided, in addition, with longitudinal bores 8 extending parallel to its axis. in the periphery of the hub 2 and opening on its front face to communicate with unrepresented lubrication channels provided in the body of the cutter 3 to open near the cutting plates 3 'of the latter, these longitudinal channels 8 opening to their other end in a chamber 9 connected to an axial conduit 10 for supplying lubricating liquids. The chamber 9 may, for example, correspond to an obviously made in the body 1 close to the end of the screw 7 for clamping the cutter 3 when the latter is fully tightened. Thanks to the invention, it is possible to make a milling mandrel to obtain a perfect centering of the tool, so that its adjustment can also be performed perfectly and reproducibly without specific adaptation to each tool. In addition, the provision of lubrication channels at the periphery of the hub 2 makes it possible to ensure that the front portion of the tool is properly supplied with lubricating fluid.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention. Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

- A -R E V E N D I C A T I O N S - A -REVENDICATIONS
1. Mandrin porte-fraise, constitué par un corps (1) de montage sur un porte-outil et muni d'un moyeu (2) de fixation d'un corps de fraise (3), caractérisé en ce que le moyeu (2) de fixation d'un corps de fraise (3) est hydro-expansible. Milling chuck, constituted by a body (1) for mounting on a tool holder and provided with a hub (2) for fixing a milling body (3), characterized in that the hub (2 ) of fixing a strawberry body (3) is hydro-expandable.
2. Mandrin porte-fraise, suivant la revendication 1, caractérisé en ce que le moyeu (2) présente un manchon extérieur (4) pourvu d'une chambre annulaire (4') à paroi extérieure de faible épaisseur, cette chambre étant reliée à un moyen (5) de mise sous pression, traversant le corps (1).2. milling chuck according to claim 1, characterized in that the hub (2) has an outer sleeve (4) provided with an annular chamber (4 ') with a thin outer wall, this chamber being connected to pressurizing means (5) passing through the body (1).
3. Mandrin porte- fraise, suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que le manchon extérieur (4) est une pièce rapportée fixée sur le moyeu (2) par frettage, brasage ou autre et le moyen (5) de mise sous pression est relié à la chambre annulaire (4') par l'intermédiaire d'un perçage disposé dans le moyeu (2) et débouchant à travers la paroi de celui-ci dans la chambre annulaire (4'). 3. chuck milling cutter, according to any one of claims 1 and 2, characterized in that the outer sleeve (4) is an insert attached to the hub (2) by hooping, brazing or other and the means (5) ) is connected to the annular chamber (4 ') via a bore disposed in the hub (2) and opening through the wall thereof in the annular chamber (4').
4. Mandrin porte-fraise, suivant l'une quelconque des revendications 1 et 2,' caractérisé en ce que le moyeu (2) du corps porte- fraise (1) est pourvu, en outre, de perçages longitudinaux (8) s'étendant parallèlement à son axe dans le pourtour du moyeu (2) et débouchant sur sa face avant pour communiquer avec des canaux de lubrification prévus dans le corps de la fraise (3) pour déboucher près des plaquettes de coupe (3') de cette dernière, ces canaux longitudinaux (8) débouchant à leur autre extrémité dans une chambre (9) reliée à un conduit axial (10) d'amenée de liquides de lubrification. 4. Mandrel reamer spindle according to any one of claims 1 and 2, 'characterized in that the hub (2) of the cutter holder body (1) is provided with further longitudinal bores (8) s' extending parallel to its axis in the periphery of the hub (2) and opening on its front face to communicate with lubrication channels provided in the body of the cutter (3) to open near the cutting tips (3 ') of the latter these longitudinal channels (8) opening at their other end in a chamber (9) connected to an axial conduit (10) for supplying lubricating liquids.
EP05793053A 2004-08-09 2005-07-28 Arbour for milling cutter Withdrawn EP1778428A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0408756A FR2873944B1 (en) 2004-08-09 2004-08-09 STRAWBERRY CHUCK
PCT/FR2005/001982 WO2006024757A1 (en) 2004-08-09 2005-07-28 Arbour for milling cutter

Publications (1)

Publication Number Publication Date
EP1778428A1 true EP1778428A1 (en) 2007-05-02

Family

ID=34948257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05793053A Withdrawn EP1778428A1 (en) 2004-08-09 2005-07-28 Arbour for milling cutter

Country Status (8)

Country Link
US (1) US20080185792A1 (en)
EP (1) EP1778428A1 (en)
JP (1) JP2008509014A (en)
KR (1) KR20070061520A (en)
CN (1) CN100540193C (en)
CA (1) CA2576885A1 (en)
FR (1) FR2873944B1 (en)
WO (1) WO2006024757A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102010005844B4 (en) * 2010-01-26 2011-11-03 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik expansion chucking
WO2014023778A1 (en) * 2012-08-09 2014-02-13 Franz Haimer Maschinenbau Kg Centering device
JP5725111B2 (en) * 2013-09-13 2015-05-27 三菱マテリアル株式会社 Cutting tools
CN105014437B (en) * 2015-08-09 2018-02-09 宿迁天成锋精机股份有限公司 A kind of centering and clamping apparatus
RU2697909C1 (en) * 2017-11-20 2019-08-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный аграрный университет имени В.Я. Горина" Device for installation of disk working elements at hardening
US20200001374A1 (en) * 2018-06-29 2020-01-02 Herramientas Preziss, S.L. Cutting Insert Applicable To Machining Tools And The Tool Bearing It
RU2725934C1 (en) * 2019-10-14 2020-07-07 Общество с ограниченной ответственностью Управляющая компания "Алтайский завод прецизионных изделий" Method of securing part on machine and device for implementation thereof
US11298757B2 (en) * 2020-05-15 2022-04-12 Shin-Yain Industrial Co., Ltd. Firmly assembled cutter holding assembly
CN111570882A (en) * 2020-05-29 2020-08-25 大连理工大学 Self-centering clamping structure of large-diameter cutter
CN114888653B (en) * 2022-05-13 2023-04-18 杭州职业技术学院 Wheel hub positioning device of new energy automobile

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US5197720A (en) * 1989-03-23 1993-03-30 Daimler-Benz Ag Clamping tool for non-positive and high-precision clamping of workpieces

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US3130978A (en) * 1961-07-31 1964-04-28 Ingersoll Milling Machine Co Expansible mandrel
US4195792A (en) * 1978-12-11 1980-04-01 Hall Melvin D Expandable mandrels
SE418467B (en) * 1979-10-19 1981-06-09 Eminentverktyg Ab STANDARD TENSION DEVICE FOR TOOLS OR TOOLS
US4407199A (en) * 1980-10-06 1983-10-04 Mosstype Corporation Mandrel assembly for demountable printing cylinders of different lengths
US4422653A (en) * 1982-04-16 1983-12-27 Sheffer Collet Company Chuck for tubular workpieces
DE3716986A1 (en) * 1987-05-21 1988-12-15 Emitec Emissionstechnologie DEVICE FOR HYDRAULIC EXPANSION

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Publication number Priority date Publication date Assignee Title
US5197720A (en) * 1989-03-23 1993-03-30 Daimler-Benz Ag Clamping tool for non-positive and high-precision clamping of workpieces

Also Published As

Publication number Publication date
WO2006024757A1 (en) 2006-03-09
FR2873944B1 (en) 2006-10-06
CN100540193C (en) 2009-09-16
CA2576885A1 (en) 2006-03-09
JP2008509014A (en) 2008-03-27
KR20070061520A (en) 2007-06-13
WO2006024757A8 (en) 2007-04-26
CN101076422A (en) 2007-11-21
FR2873944A1 (en) 2006-02-10
US20080185792A1 (en) 2008-08-07

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