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WO1998031500A1 - Dispositif de fixation pour pieces a usiner sur plusieurs faces - Google Patents

Dispositif de fixation pour pieces a usiner sur plusieurs faces Download PDF

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Publication number
WO1998031500A1
WO1998031500A1 PCT/EP1998/000212 EP9800212W WO9831500A1 WO 1998031500 A1 WO1998031500 A1 WO 1998031500A1 EP 9800212 W EP9800212 W EP 9800212W WO 9831500 A1 WO9831500 A1 WO 9831500A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding device
workpieces
housing
clamping
support
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.)
Ceased
Application number
PCT/EP1998/000212
Other languages
German (de)
English (en)
Inventor
Bernhard Magerl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1998031500A1 publication Critical patent/WO1998031500A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/52—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/001—Arrangements compensating weight or flexion on parts of the machine
    • 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
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for

Definitions

  • the present invention relates to a holding device for multi-sided workpieces according to the preamble of the first claim.
  • Such holding devices are required in machine tools with which workpieces can be machined from different sides with different tools at a standstill.
  • the workpieces are pivoted from one machining position into another with the aid of an angle switching device which is built into the machine tool and can be actuated via a control device.
  • the holding device has the task of continuing to turn the workpiece into the individual machining positions without the application of machining forces or to support it at a standstill during machining.
  • EP 0547 554 B1 describes a workpiece holding device for workpieces to be machined on multiple sides on machine tools, in which the workpiece is clamped by means of a clamping force between two clamping pieces which can be moved in the axial direction and are provided with flat clamping surfaces.
  • each of the clamping pieces is connected to a spindle, which is in each case mounted in a housing fastened to the work table of the machine tool.
  • the first housing accommodates the angle switching device connected to it, while the second housing houses the freely rotatable support spindle connected to a drive for generating the clamping force.
  • the clamped parts such as the two housings with their fastening screws and the part of the work table lying between them, deform such that the axes of the two spindles each form an angle against one another form the level of the worktable and intersect in the area of the workpiece.
  • these angles are very small, the deformations result in a change in the workpiece position compared to the ideal workpiece axis, which leads to impermissible dimensional deviations during machining.
  • the deviating position of the clamping surfaces on the clamping pieces resulting from the deformations can also cause a not inconsiderable eccentricity of the point of application of the clamping force, which leads to an unstable clamping of the workpiece.
  • the object of the invention is seen in applying measures to reduce or completely eliminate the deformations caused by the clamping force on the generic device.
  • the object is achieved in a holding device of the generic type in that at least one of the housings is provided with means which counteract the inclination of the axis of the associated spindle under the action of the clamping force with respect to the clamping plane of the machine tool and at least at a certain value cancel that force.
  • the means used in the context of the invention produce in the respective housing an inclination of the spindle axis which is opposite to the inclination which is set by the clamping force.
  • the aim of the setting is that the spindle axis runs horizontally at the nominal value of the clamping force and that the two axes of the holding device are set coaxially.
  • the idea of the invention is realized with the aid of an inclination of the foot in the base of the housing, which can be combined with a stepless height adjustment.
  • the idea of the invention can also be realized with support parts arranged on an outside of the housing and having adjustable support forces.
  • a pressure medium operated support cylinder are provided, which in conjunction with a drive cylinder to generate the clamping force prevent inclinations of the spindle axis in each load level.
  • the two housings are designed so that the axes of the drive spindle and the support spindle each have an inclination in the unloaded state with respect to the clamping surface of the work table and intersect in the area of the workpiece to be clamped.
  • the loaded components of the machine tool deform so that the axes of the drive and support spindles are set coaxially and the clamping surfaces are parallel to one another.
  • the workpiece has no deformation or change in position due to the clamping relative to the parts of the machine tool; Any precision machining can now be carried out on them.
  • Each support part is used on the side facing away from the clamping pieces on a housing bearing attached to the upper edge of the housing and on an abutment attached to the work table or to a base plate molded onto the respective housing.
  • the support parts are designed so that not only a backlash-free but also a support acted upon by a support force can be set, which results in an inclination of the axis.
  • supporting parts for example, threaded spindles with a right-left thread are provided, which can be adjusted steplessly with a defined supporting force after installation in the bearing points.
  • Support cylinders operating with a pressure medium can also be used in machine tools in which there are hydraulic systems.
  • the precise setting of the supporting force with the aid of the storage pressure of the system is particularly advantageous, possibly via an intermediate store, which can be adjusted to the pressure value corresponding to the supporting force.
  • a parallel connection of one or more support cylinders is suitable for a machine tool in which the clamping force is used with a working cylinder fed by a hydraulic system.
  • this solution can be used to achieve completely deformation-free clamping on the side of the second housing regardless of the size of the clamping force.
  • the stability of the support of a housing can be improved by attaching two or more support parts.
  • a particularly effective embodiment in the context of the invention is a connection of the first to the second housing by means of one of the support members specified above.
  • a housing bearing is attached to a suitable location in each of which an eye of the support member is inserted and adjusted with a supporting force becomes.
  • the attachment of two support links outside this area is recommended.
  • the power flow is limited to the two housings and the support members, so that additional abutments are unnecessary.
  • the supporting members only have to be lengthened or shortened.
  • the length can be changed by adding or removing parts of the piston rod.
  • the deformations of the two housings which are caused by the clamping force and reduce the accuracy of the workpieces, can be prevented according to the above either by constructive changes to the housings themselves or, in the case of unchanged housings, by external support measures.
  • the most suitable measure can be selected for different applications with the help of the inventive solutions.
  • FIG. 2 holding device with a workpiece clamped at the nominal value of the clamping force
  • FIG. 3 basic representation of the deformations with a clamping force exceeding the nominal value
  • FIG. 4 deformations of a workpiece with low bending stiffness with a clamping force exceeding the nominal value
  • FIG. 6 height adjustment of the second clamping piece by means of a support part adjustable with a fine thread
  • Figure 8 view in direction D against the base of the second housing in an enlarged view.
  • Figure 9 housing with threaded rod ' as a support member
  • Figure 10 housing with pressure medium-filled support cylinder
  • FIG. 11 housing as in FIG. 10 with an additional working cylinder for generating the clamping force
  • FIG. 12 supporting parts suspended from the housings of the two housings
  • ⁇ PJ PP ⁇ - ti CQ tr 1 CO CQ P CQ ii z. tr tr z
  • JP ti ⁇ 0 ⁇ CQ tr ⁇ - rt PJ P ⁇ tr ⁇ ⁇ ⁇ ⁇ - N 01 ⁇ - ti 0 tr ii p et ⁇ ⁇ P ⁇ P ss ti P ⁇ Q C ⁇ D. ii ⁇ tr ⁇ N CQ rt ⁇ > 0 ⁇ ⁇ ti P ⁇ - CQ ⁇ Q ⁇ li ⁇ !
  • a hydraulic fluid is particularly suitable as a pressure medium for the support members, with which list pressures of several hundred bar can be transmitted.
  • the pressure load can take place during the entire operating period of the holding device, irrespective of the intervals in which the clamping force is applied. It is different with an embodiment according to FIG. 11, in which the pressure load of the entire system only takes place during the time in which a workpiece is clamped.
  • the operating modes of the supports just mentioned have an influence on the selection of hydraulic fluid and seals.

Landscapes

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

Abstract

L'invention concerne un nouveau dispositif de fixation pour pièces à usiner sur plusieurs faces, dont les axes (14, 15) de la broche d'entraînement (4) ou de la broche de support (5), qui porte les pièces de serrage (7, 8), sont inclinées d'un angle ( alpha 1 ou alpha 2) qui est dans la réalité très petit, par rapport à la table de travail (1) et à l'axe de pièce idéale (19). Le serrage d'une pièce entre les pièces de serrage (7, 8) avec une force de serrage agissant dans le sens axial entraîne une déformation du boîtier (2, 3) et de son moyen de fixation, cela permettant d'obtenir, pour une valeur nominale fixée, l'alignement coaxial des axes (14, 15) et donc la position de serrage optimale de la pièce. Des valeurs de la force de serrage s'écartant de la valeur nominale entraînent des déformations complémentaires qui peuvent influer sur la position de serrage de la pièce de sorte que le respect des dimensions soumis à d'étroites tolérances est compromis. Le dispositif selon l'invention offre la possibilité, au moins au niveau d'un boîtier (3), d'effectuer un réglage en hauteur à l'aide d'un support (11) qui peut être décalé d'un petit angle ( beta ) par rapport au socle (13). Une échelle (17) indiquant l'intensité de la force de serrage permet un réglage sûr du support (11).
PCT/EP1998/000212 1997-01-16 1998-01-15 Dispositif de fixation pour pieces a usiner sur plusieurs faces Ceased WO1998031500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19701394.5 1997-01-16
DE1997101394 DE19701394C1 (de) 1997-01-16 1997-01-16 Haltevorrichtung für mehrseitig zu bearbeitende Werkstücke

Publications (1)

Publication Number Publication Date
WO1998031500A1 true WO1998031500A1 (fr) 1998-07-23

Family

ID=7817571

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/000212 Ceased WO1998031500A1 (fr) 1997-01-16 1998-01-15 Dispositif de fixation pour pieces a usiner sur plusieurs faces

Country Status (2)

Country Link
DE (1) DE19701394C1 (fr)
WO (1) WO1998031500A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108526922A (zh) * 2018-06-02 2018-09-14 韩志群 一种金属加工件加工用固定夹持装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111473A1 (de) 2012-11-27 2014-05-28 Magerl Feinmechanik Gmbh Werkstückhaltevorrichtung
CN105171478A (zh) * 2015-07-16 2015-12-23 佛山市普拉迪数控科技有限公司 一种具有加高夹具的悬臂式四轴加工机床

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4759535A (en) * 1986-05-31 1988-07-26 Tamotsu Takasugi Machine vice
EP0547554A1 (fr) * 1991-12-18 1993-06-23 MAGERL FEINMECHANIK GmbH Appareil de serrage pour usiner en muti-faces
JPH07251342A (ja) * 1994-03-15 1995-10-03 Kosumetsuku:Kk ワーク用クランプ装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822408A1 (de) * 1987-10-14 1989-05-03 Guenter Meywald Schraubstock mit klemmbacken

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4759535A (en) * 1986-05-31 1988-07-26 Tamotsu Takasugi Machine vice
EP0547554A1 (fr) * 1991-12-18 1993-06-23 MAGERL FEINMECHANIK GmbH Appareil de serrage pour usiner en muti-faces
JPH07251342A (ja) * 1994-03-15 1995-10-03 Kosumetsuku:Kk ワーク用クランプ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 096, no. 002 29 February 1996 (1996-02-29) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108526922A (zh) * 2018-06-02 2018-09-14 韩志群 一种金属加工件加工用固定夹持装置

Also Published As

Publication number Publication date
DE19701394C1 (de) 1998-07-23

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