WO1995029029A1 - Douille hydraulique a moyens de mise sous pression axialement mobiles a l'arriere de la douille - Google Patents

Douille hydraulique a moyens de mise sous pression axialement mobiles a l'arriere de la douille Download PDF

Info

Publication number
WO1995029029A1
WO1995029029A1 PCT/SE1995/000381 SE9500381W WO9529029A1 WO 1995029029 A1 WO1995029029 A1 WO 1995029029A1 SE 9500381 W SE9500381 W SE 9500381W WO 9529029 A1 WO9529029 A1 WO 9529029A1
Authority
WO
WIPO (PCT)
Prior art keywords
bushing
pressurizing means
cavity
holder
hydraulic
Prior art date
Application number
PCT/SE1995/000381
Other languages
English (en)
Inventor
Jan Danielsen
Original Assignee
Spirex Tools Ab
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
Priority claimed from SE9401395A external-priority patent/SE504380C2/sv
Application filed by Spirex Tools Ab filed Critical Spirex Tools Ab
Priority to AU24220/95A priority Critical patent/AU2422095A/en
Publication of WO1995029029A1 publication Critical patent/WO1995029029A1/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
    • 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
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B23B31/201—Characterized by features relating primarily to remote control of the gripping means
    • B23B31/2012—Threaded cam actuator

Definitions

  • Hydraulic bushing with axially displaceable pressurizing means at the rear of the bushing
  • Hydraulic bushings of various types are known, for instance, through Swedish patent 460,264 and 500,552. From the machining aspect the known constructions have the limitation that the flange part with pressurizing means is usually too large when machining must be performed in narrow work pieces such as aluminium components for the aircraft industry. They are also too heavy which will place increased demands at high rpm on both design and material.
  • the above-mentioned problems are solved according to the present invention by placing the pressurizing means axially in the rear portion of the bushing, i.e. the part to be inserted in the part of the holder, that is to transmit rotary movement to the bushing.
  • the pressurizing means can be influenced so that a unit can perform an axial movement parallel to the axis of the bushing, thereby influencing the bushing system.
  • the unit suitably constitutes a body provided with threading that cooperates with a thread in a cavity where the unit is localized.
  • Hydraulic bushings are often manufactured by specialist companies and are fitted on a holder part by another company that adapts the construction to the requirements of the market. It must therefore be possible for the bushing to be fitted either directly to the holder by means of a screw joint or to be welded, soldered or in some other way secured to the holder. Screw joints are not accepted for certain purposes where high speed is necessary, and some other connection means must therefore be used.
  • the bushing construction can be designed to have two attachment parts, one of which locks inwardly against the machining tool and the other one which locks outwardly towards the holder part, both hydraulic bushing parts being influenced by the same pressurizing means and where the circuits can be separated from each other when necessary.
  • the method offers extremely good centering and secure locking. If no screw joint is used the construction is secured to the holder part by means of welding, soldering or some other equivalent method.
  • Figure 1 shows a known bushing with holder part having tangential pressur- izing means in the flange of the bushing.
  • Figure 2 shows a bushing according to the present invention, for attachment to the holder part by means of a screw joint and with coolant supplied axially,
  • Figure 3 shows a bushing according to Figure 2 secured to the holder part by means of a screw joint
  • Figure 4 shows a bushing with one hydraulic bushing clamping inwardly to retain a machining tool and one hydraulic bushing clamping out ⁇ wardly against the holder part, both being influenced by the same pressurizing means and with coolant being supplied axially.
  • the two pressurizing circuits may be separated from each other, not shown here.
  • Figures 2, 3 and 4 show a bushing with a cavity 2.
  • a tubular channel 10 is arranged inside the cavity wall, of the same type as channel 11 in Figure 1.
  • the channel 10 is in communication with a supply channel 9 which is in turn in communication with a space 11 for pressure medium.
  • a space 11 for pressure medium In this latter space is an axially movable body 4, provided with a sealing ring and valve ball 3.
  • the body 4 can be influenced by a second body 5 provided with external threading that cooperates with threading arranged in the cavity in which said second body is located. By subjecting the second body 5 to a screwing movement, therefore, the pressure medium in the tubular channel 10 and the space 11 can be influenced, thereby displacing the wall of the cavity in radial direction.
  • the second body 5 is influenced solely from behind with the aid of a suitable tool, e.g. a tee wrench.
  • 8 indicates the part of the holder able to transmit a rotary movement to the bushing 1. Coolant supplied axially through the holder part 8 is supplied to the bushing 1 through one or more axial, helically or otherwise shaped channels (7) in the shaft part 6 enabling coolant to reach the cavity in order to cool the machining part of the machining tool if this is provided with internal cooling channels.
  • Figure 4 shows a shaft part 6 in the form of a hydraulic bushing clamping outwardly against the holder part 8.
  • the wall of the space 2 is placed under pressure in order to clamp the machining tool, and also the wall of the shaft part 6 in order to clamp it against the holder part 8.
  • the two circuits 10 and 13 can be separated from each other with the aid of some form of stop device. This is not shown in Figure 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Vehicle Body Suspensions (AREA)
  • Gripping On Spindles (AREA)
  • Machine Tool Units (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

Les douilles hydrauliques (1) sont généralement pourvues d'une bride périphérique dans laquelle un moyen de mise sous pression (3, 4, 5) est disposé. Il serait souhaitable de supprimer ladite bride, et, à cet effet, la présente invention prévoit de placer le moyen de mise sous pression (3, 4, 5) dans l'extrémité arrière de la douille (1).
PCT/SE1995/000381 1994-04-25 1995-04-07 Douille hydraulique a moyens de mise sous pression axialement mobiles a l'arriere de la douille WO1995029029A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24220/95A AU2422095A (en) 1994-04-25 1995-04-07 Hydraulic bushing with axially displaceable pressurizing means at the rear of the bushing

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9401395A SE504380C2 (sv) 1994-04-25 1994-04-25 Hydraulisk bussning
SE9401395-0 1994-04-25
SE9404172A SE504381C2 (sv) 1994-04-25 1994-12-01 Dubbelverkande hydraulisk bussning
SE9404172-0 1994-12-01

Publications (1)

Publication Number Publication Date
WO1995029029A1 true WO1995029029A1 (fr) 1995-11-02

Family

ID=26662041

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/000381 WO1995029029A1 (fr) 1994-04-25 1995-04-07 Douille hydraulique a moyens de mise sous pression axialement mobiles a l'arriere de la douille

Country Status (3)

Country Link
AU (1) AU2422095A (fr)
SE (1) SE504381C2 (fr)
WO (1) WO1995029029A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998032562A1 (fr) * 1997-01-28 1998-07-30 Etp Transmission Ab Mandrin hydraulique de precision
WO2005097383A1 (fr) * 2004-04-03 2005-10-20 Kennametal Inc. Mandrin de serrage hydraulique expansible
EP1649956A1 (fr) * 2004-10-21 2006-04-26 Etp Transmission Ab Raccord à frottement avec actionnement hydraulique
WO2021001155A1 (fr) * 2019-07-03 2021-01-07 Gühring KG Mandrin de serrage expansible hydrauliquement
DE102019215695A1 (de) * 2019-10-11 2021-04-15 Kennametal Inc. Hydraulische Werkzeughalterung sowie Dichtkolben für eine solche

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963298A (en) * 1958-04-16 1960-12-06 Scully Jones & Co Hydraulically expanding thin walled tools
US3130978A (en) * 1961-07-31 1964-04-28 Ingersoll Milling Machine Co Expansible mandrel
US3250542A (en) * 1964-05-04 1966-05-10 Erickson Tool Co Hydraulic chucks and arbors
US3731942A (en) * 1970-09-30 1973-05-08 Buck Tool Co Hydraulically actuated tool collet
US3770287A (en) * 1972-01-13 1973-11-06 Positrol Inc Hydraulically controlled holding device
DE3417641A1 (de) * 1984-05-12 1985-11-14 Manfred 6980 Wertheim König Hydraulisches spannelement mit unwuchtausgleich

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963298A (en) * 1958-04-16 1960-12-06 Scully Jones & Co Hydraulically expanding thin walled tools
US3130978A (en) * 1961-07-31 1964-04-28 Ingersoll Milling Machine Co Expansible mandrel
US3250542A (en) * 1964-05-04 1966-05-10 Erickson Tool Co Hydraulic chucks and arbors
US3731942A (en) * 1970-09-30 1973-05-08 Buck Tool Co Hydraulically actuated tool collet
US3770287A (en) * 1972-01-13 1973-11-06 Positrol Inc Hydraulically controlled holding device
DE3417641A1 (de) * 1984-05-12 1985-11-14 Manfred 6980 Wertheim König Hydraulisches spannelement mit unwuchtausgleich

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998032562A1 (fr) * 1997-01-28 1998-07-30 Etp Transmission Ab Mandrin hydraulique de precision
WO2005097383A1 (fr) * 2004-04-03 2005-10-20 Kennametal Inc. Mandrin de serrage hydraulique expansible
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
EP1649956A1 (fr) * 2004-10-21 2006-04-26 Etp Transmission Ab Raccord à frottement avec actionnement hydraulique
WO2021001155A1 (fr) * 2019-07-03 2021-01-07 Gühring KG Mandrin de serrage expansible hydrauliquement
DE102019215695A1 (de) * 2019-10-11 2021-04-15 Kennametal Inc. Hydraulische Werkzeughalterung sowie Dichtkolben für eine solche
US11732804B2 (en) 2019-10-11 2023-08-22 Kennametal Inc. Hydraulic tool mount and sealing piston for such a mount

Also Published As

Publication number Publication date
SE504381C2 (sv) 1997-01-27
SE9404172L (sv) 1995-10-26
SE9404172D0 (sv) 1994-12-01
AU2422095A (en) 1995-11-16

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