WO1994026448A1 - Prolongateur d'outil pour applications d'usinage - Google Patents

Prolongateur d'outil pour applications d'usinage Download PDF

Info

Publication number
WO1994026448A1
WO1994026448A1 PCT/SE1994/000438 SE9400438W WO9426448A1 WO 1994026448 A1 WO1994026448 A1 WO 1994026448A1 SE 9400438 W SE9400438 W SE 9400438W WO 9426448 A1 WO9426448 A1 WO 9426448A1
Authority
WO
WIPO (PCT)
Prior art keywords
extender
tool
pressurization
pressure medium
sleeve
Prior art date
Application number
PCT/SE1994/000438
Other languages
English (en)
Inventor
Stefan LINDSTRÖM
Arne ANDRÉASSON
Original Assignee
E T P Transmission Ab
Ab Sandvik Coromant
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 T P Transmission Ab, Ab Sandvik Coromant filed Critical E T P Transmission Ab
Priority to EP94915740A priority Critical patent/EP0697932A1/fr
Priority to JP6525331A priority patent/JPH08510174A/ja
Publication of WO1994026448A1 publication Critical patent/WO1994026448A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
    • B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
    • B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
    • B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
    • 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
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/12—Adapters for drills or chucks; Tapered sleeves
    • B23B51/126—Tool elongating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/33—Elastomers, e.g. rubber

Definitions

  • Known extenders are of a mechanical construction and the tool is thus fastened in the extender by a screw joint, a wedge joint, a taper joint or similar, which joints usually do not bring about a particularly good holding accuracy.
  • mechanical extenders and holding means smaller or larger runouts of the machining tool are practically unavoidable. Due to the fact that the cutting insert or the machining part of the tool, when using an extender, will be displaced relatively far away from the holding means of the machine, any occurring runouts will become very noticeable, which leads to the produced surfaces not obtaining the desired smoothness . It may become necessary to use low machining speeds, which result in long machining times.
  • the fastening into the holding means of the machine can usually be accomplished with relatively good precision, but contrary thereto, it can be difficult to obtain a high precision at the fastening of the tool in the extender, specially due to the fact that the holding means of the extender has to be formed with a diameter as small as possible. Therefore, the runouts that occur when using mechanical extenders genereally derive from the bracing means of the extender for the tool .
  • the basis of the present invention resides in the problem of obtaining a tool extender for machines, which extender is so formed that the tool can be gripped with a considerably higher precision than achieved hitherto and which, when used in a machinining device, attains an absolute minimum of runouts at the machining part of the tool, or in many cases no runouts at all, so that one can hold high machining speeds and attain a very high smoothness of the machined surfaces, and which is also particularly suitable when machining with cutting inserts of cemented carbide.
  • the holding means for the tool in the extender is of hydraulic type and is formed as a sort of hydraulic clamping bushing with an internal, thin, unslotted sleeve, which is very accurately centered and fastened, for instance by welding, in an axial hole at the end of the extender, so that a thin gap is provided between the inner hole of the extender and the holding sleeve, this gap being filled with a plastic or elastic pressure medium.
  • some sort of pressurization means is provided. At pressurization, the holding sleeve is expanded and braces a tool introduced into the sleeve.
  • the pressurization is effected absolutely uniformally around the unslotted sleeve and, therefore, the holding accuracy is very high.
  • the pressurization medium also has a vibration damping effect, which makes the tool work under stable conditions. This is important for all tool materials and for cutting inserts of cemented carbide in particular.
  • the hydraulic extender can be construed according to two different principles, viz. I) so that the pressurization means is placed axially in the center of the braced part of the extender in the machine, or II) so that the pressurization means is arranged radially, outside the holding arrangement of the machine .
  • the first-mentioned principle brings the advantage that the external dimensions of the extender are minimized, that a very good accessability is attained at machining, and that the pressurization means are protected against the intrusion of chips, etc., during machining; the pressurization means are hidden within the holding means of the machine. However, when changing tools, the extender has to be detached from the holding means of the machine.
  • the second principle usually makes it necessary to form the extender with a somewhat larger diameter than the system according to I) , however it brings the advantage that the tool can be replaced in the extender without the latter having to be detached from the holding means of the machine, and it is easy to arrange cooling liquid conduits through the extender for further passage outwardly, through the tool .
  • This is important in view of the fact that modern milling cutters, drills and threading taps, etc., often require cooling and, therefore, are equipped with axially extending cooling medium conduits through the tool, which conduits can be connected directly to the cooling medium conduits of the extender.
  • Figure 1 shows a known arrangement and illustrates problems which can arise when machining with such an arrangement
  • Figure 2 shows the use of a known type of mechanical extender in order to eliminate the problems illustrated in Figure 1;
  • Figure 3 shows an extender of a hydraulic type according to the invention
  • Figure 4 illustrates the use of the extender of Figure 3
  • Figure 5 shows an alternative type of extender according to the present invention with a hydraulic tool holding means with a radial pressurization mechanism
  • Figure 6 shows a part of the extender according to Figure 5 in a larger scale
  • Figure 7 shows the extender according to Figure 5 when used in a tool machine.
  • a plastic or elastic pressure medium 11 such as a grease or a hydraulic oil.
  • the pressure medium 11 communicates via a conduit 12 filled with the same pressure medium, with an axial pressurization means, which can consist of a pressure piston 13 with an activation screw, which can be turned with a suitable tool 14, for instance a hexagon key, whereby the pressure medium 11 is pressurized universally, according to well known hydraulic laws. In its turn, this brings the thin walls of the sleeve 8 to expand radially inwards, thereby centering and bracing a tool 15, as shown in Fig. 4.
  • the pressurization means can consist of some external hydraulic pressurization means.
  • the extender body 6 is machined externally and the sleeve internally after the extender having been prepared and filled with its pressure medium 11, so that the whole extender with its holding sleeve attains an optimally balanced rotation.
  • the hydraulic holding means effects a very precise centering of the tool and a strong and firm gripping of the tool 15, and since the extender also has an accurately machined outer diameter, the described extender will render a fixation of the tool with extremely small radial runouts - if any at all.
  • the pressure medium has a vibration damping function that improves the cutting machining. Therefore, the machining can be performed with high machining speeds and still accomplish a very high machining precision.
  • Fig. 4 shows the use of an extender of the type described in connection with Fig. 3.
  • the tool is first introduced into the sleeve 8 in the extender and with the help of the key 14 the pressure piston 13 is screwed inwards so that the tool is centered and thereafter firmly fixed in the extender. After this, the extender together with the tool is fastened in the chuck 4 of the machine.
  • Modern tools such as cemented carbide tools, are often arranged with a central through-going axial conduit 16 for some kind of cooling medium, and for the introduction of a cooling medium into the tool, the tool machine as well as the extender can be formed with some sort of a cooling medium conduit 17 for the passage of a cooling medium through the tool.
  • the cooling medium conduit in extender 6 is parallelly displaced to the centrally situated pressure medium conduit 12 and hidden behind the latter.
  • the cooling medium conduit in extender 6 can also be inclined in relation with conduit 12, the only essential factor being that it shall lead from the rear surface of extender 6 to the internal bottom surface of sleeve 8.
  • the extender with the tool is detached from the tool machine.
  • the tool can remain in the extender or it can be removed by screwing the pressurization piston 13 outwards, or the tool can be replaced by another tool for continued machininig.
  • Figures 5 - 7 show an alternative extender which differs from the above described extender mainly in that it is built with a radial collar 18 in which the pressurization piston 13 is arranged in a radially activatable position.
  • This embodiment has the advantage of making it possible to replace tool 15 without detaching the extender from the tool machine .
  • the cooling medium conduit 17' along the central axis of the extender.
  • the whole conduit 17' and by the way also conduit 17 in the above embodiment, contains a fitting pipe so that conduit 17' can overbridge the pressure medium gap and the sleeve 8, thus leading into the gap between the bottom surface of hole 7 and the rear end of tool 15.
  • Said pipe has a length corresponding to the whole conduit 17', or only to a part for extending through the pressure medium gap and the bottom wall of sleeve 8.
  • the holding part for the extender in the tool machine above has been shown and described as a circular, cylindrical body, it is obvious that it can have any other shape, e.g., an axially conical form and/or have a polygonal or other cross-sectional form.
  • the front part for holding the tool can have an external slightly tapered form in order to further improve the accessability to obstructed working surfaces.
  • the part in front of collar 18 can have a tapering angle of 2 to 4°.

Abstract

L'invention concerne un prolongateur d'outil destiné à des machines d'usinage et comprenant un corps prolongateur (6) agencé, d'une manière connue, pour être fixé par exemple dans un mandrin (4), dans une machine outil, et doté d'un moyen de maintien d'un outil (15) se présentant sous la forme d'une sorte de douille de serrage hydraulique présentant un manchon (8) interne mince sans fente, lequel est centré et vissé de manière très précise, notamment soudé dans un trou axial (7) à l'extrémité du prolongateur, de manière qu'un espace très étroit est créé entre le trou (7) du prolongateur et le manchon de serrage (8), ledit espace étant rempli d'un milieu de pression plastique ou élastique (11) agencé de manière à être mis sous pression et dépressurisé à l'aide d'un dispositif approprié (13), de sorte qu'un outil (15) de dimension ajustée peut être fixé dans le prolongateur et détaché de ce dernier.
PCT/SE1994/000438 1993-05-12 1994-05-11 Prolongateur d'outil pour applications d'usinage WO1994026448A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94915740A EP0697932A1 (fr) 1993-05-12 1994-05-11 Prolongateur d'outil pour applications d'usinage
JP6525331A JPH08510174A (ja) 1993-05-12 1994-05-11 機械工作用の工具増長機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9301632-7 1993-05-12
SE9301632A SE502498C2 (sv) 1993-05-12 1993-05-12 Verktygsförlängare innefattande en hydraulisk spännbussning med en invändig kylkanal

Publications (1)

Publication Number Publication Date
WO1994026448A1 true WO1994026448A1 (fr) 1994-11-24

Family

ID=20389914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1994/000438 WO1994026448A1 (fr) 1993-05-12 1994-05-11 Prolongateur d'outil pour applications d'usinage

Country Status (5)

Country Link
EP (1) EP0697932A1 (fr)
JP (1) JPH08510174A (fr)
CA (1) CA2162386A1 (fr)
SE (1) SE502498C2 (fr)
WO (1) WO1994026448A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998026804A1 (fr) * 1996-12-17 1998-06-25 University Of Kansas Medical Center Dosage biologique pour composes prevenant des complications diabetiques et agents ainsi identifies
WO1998032560A1 (fr) * 1997-01-28 1998-07-30 Etp Transmission Ab Mandrin hydromecanique
WO2001045883A2 (fr) * 1999-12-22 2001-06-28 Sandvik Aktiebolag Ensemble porte-outil et tete amovible a montage ajuste par contraction
WO2007090558A2 (fr) * 2006-02-03 2007-08-16 Kennametal Inc. Outil combiné et procédé d'usinage par enlèvement de copeaux d'un trou et de sa surface de perçage et élément coupant pour un outil combiné de ce type
US7914010B2 (en) * 2004-04-03 2011-03-29 Kennametal Inc. Hydraulic expansion chuck for chucking a tool, such as a boring tool, milling cutter, or other cutting tool
US7967300B2 (en) * 2006-11-17 2011-06-28 Hydra-Lock Corporation Hydrostatically actuated workholding apparatus with high expansion and recovery sleeve
US20140099171A1 (en) * 2012-09-21 2014-04-10 James Gosselin Integrated clamping system for machine tools
CN104043999A (zh) * 2014-06-26 2014-09-17 无锡市威海达机械制造有限公司 数控车床夹持装置
CN105499629A (zh) * 2016-01-20 2016-04-20 江苏金通灵流体机械科技股份有限公司 一种汽轮机转子轮盘平衡孔加工方法及加工刀具
CN108972092A (zh) * 2018-07-26 2018-12-11 朱田业 一种数控铣床定长装刀装置
DE102019000392A1 (de) 2019-01-21 2020-07-23 Michael Selbach e.K. Verbindungselement zur Verbindung eines Werkzeuges mit einer Werkzeugverlängerung und Verfahren zur Herstellung
CN114450115A (zh) * 2019-09-20 2022-05-06 别格大昭和株式会社 液压卡盘

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102941370A (zh) * 2012-11-16 2013-02-27 哈尔滨汽轮机厂有限责任公司 汽轮机转子叶轮蒸汽平衡孔加工方法
CN104589085A (zh) * 2014-11-26 2015-05-06 柳州瑞明威罗动力机械有限公司 一种调温器盖车外圆夹具
CN106736775A (zh) * 2017-03-15 2017-05-31 蓝思科技（长沙）有限公司 一种加工金刚石磨头的方法及夹具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677559A (en) * 1971-01-19 1972-07-18 Eugene R Andre Hydrostatic holding device
DE2059307B2 (fr) * 1969-12-04 1975-06-05 Societe Genevoise D'instruments De Physique, Genf (Schweiz)
EP0164582A1 (fr) * 1984-05-12 1985-12-18 Manfred König Mandrin pour le montage centré de pièces en rotation
US4813831A (en) * 1987-03-11 1989-03-21 Gottlieb Guhring Kg Coupling system for cutting shank tools
US5067861A (en) * 1988-02-19 1991-11-26 Jan Danielsen Tool holder with interchangeable fluid pressure actuated chucks
EP0523574A2 (fr) * 1991-07-19 1993-01-20 Gebr. Heller Maschinenfabrik GmbH Dispositif de serrage pour outils singuliers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2059307B2 (fr) * 1969-12-04 1975-06-05 Societe Genevoise D'instruments De Physique, Genf (Schweiz)
US3677559A (en) * 1971-01-19 1972-07-18 Eugene R Andre Hydrostatic holding device
EP0164582A1 (fr) * 1984-05-12 1985-12-18 Manfred König Mandrin pour le montage centré de pièces en rotation
US4813831A (en) * 1987-03-11 1989-03-21 Gottlieb Guhring Kg Coupling system for cutting shank tools
US5067861A (en) * 1988-02-19 1991-11-26 Jan Danielsen Tool holder with interchangeable fluid pressure actuated chucks
EP0523574A2 (fr) * 1991-07-19 1993-01-20 Gebr. Heller Maschinenfabrik GmbH Dispositif de serrage pour outils singuliers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 11, No. 149, M-588; & JP,A,61 284 341 (TOSHIBA CORP), 15 December 1986 (15.12.86). *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998026804A1 (fr) * 1996-12-17 1998-06-25 University Of Kansas Medical Center Dosage biologique pour composes prevenant des complications diabetiques et agents ainsi identifies
WO1998032560A1 (fr) * 1997-01-28 1998-07-30 Etp Transmission Ab Mandrin hydromecanique
WO2001045883A2 (fr) * 1999-12-22 2001-06-28 Sandvik Aktiebolag Ensemble porte-outil et tete amovible a montage ajuste par contraction
WO2001045883A3 (fr) * 1999-12-22 2002-01-10 Sandvik Ab Ensemble porte-outil et tete amovible a montage ajuste par contraction
US6871859B2 (en) 1999-12-22 2005-03-29 Sandvik Aktiebolag Toolholder and insert arrangement with a shrink fit coupling
US7914010B2 (en) * 2004-04-03 2011-03-29 Kennametal Inc. Hydraulic expansion chuck for chucking a tool, such as a boring tool, milling cutter, or other cutting tool
WO2007090558A3 (fr) * 2006-02-03 2008-02-21 Kennametal Inc Outil combiné et procédé d'usinage par enlèvement de copeaux d'un trou et de sa surface de perçage et élément coupant pour un outil combiné de ce type
US7857557B2 (en) 2006-02-03 2010-12-28 Kennametal Inc. Combination tool and method for metal-cutting machining of a drill-hole and its hole surface as well as cutting insert for such a combination tool
WO2007090558A2 (fr) * 2006-02-03 2007-08-16 Kennametal Inc. Outil combiné et procédé d'usinage par enlèvement de copeaux d'un trou et de sa surface de perçage et élément coupant pour un outil combiné de ce type
US7967300B2 (en) * 2006-11-17 2011-06-28 Hydra-Lock Corporation Hydrostatically actuated workholding apparatus with high expansion and recovery sleeve
US8585061B2 (en) 2006-11-17 2013-11-19 Hydra-Lock Corporation Hydrostatically actuated workholding apparatus with high expansion and recovery sleeve
US20140099171A1 (en) * 2012-09-21 2014-04-10 James Gosselin Integrated clamping system for machine tools
US9387542B2 (en) * 2012-09-21 2016-07-12 James Gosselin Integrated clamping system for machine tools
CN104043999A (zh) * 2014-06-26 2014-09-17 无锡市威海达机械制造有限公司 数控车床夹持装置
CN105499629A (zh) * 2016-01-20 2016-04-20 江苏金通灵流体机械科技股份有限公司 一种汽轮机转子轮盘平衡孔加工方法及加工刀具
CN108972092A (zh) * 2018-07-26 2018-12-11 朱田业 一种数控铣床定长装刀装置
DE102019000392A1 (de) 2019-01-21 2020-07-23 Michael Selbach e.K. Verbindungselement zur Verbindung eines Werkzeuges mit einer Werkzeugverlängerung und Verfahren zur Herstellung
CN114450115A (zh) * 2019-09-20 2022-05-06 别格大昭和株式会社 液压卡盘

Also Published As

Publication number Publication date
SE502498C2 (sv) 1995-10-30
JPH08510174A (ja) 1996-10-29
SE9301632L (sv) 1994-11-13
EP0697932A1 (fr) 1996-02-28
CA2162386A1 (fr) 1994-11-24
SE9301632D0 (sv) 1993-05-12

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