EP1813389B1 - Etau de précision pour machine-outil - Google Patents

Etau de précision pour machine-outil Download PDF

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Publication number
EP1813389B1
EP1813389B1 EP07101143A EP07101143A EP1813389B1 EP 1813389 B1 EP1813389 B1 EP 1813389B1 EP 07101143 A EP07101143 A EP 07101143A EP 07101143 A EP07101143 A EP 07101143A EP 1813389 B1 EP1813389 B1 EP 1813389B1
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EP
European Patent Office
Prior art keywords
precision
axis
threaded sleeve
clamping
carriage
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.)
Active
Application number
EP07101143A
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German (de)
English (en)
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EP1813389A3 (fr
EP1813389A2 (fr
Inventor
Wilhelm Erhard
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Individual
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Publication of EP1813389A3 publication Critical patent/EP1813389A3/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/103—Arrangements for positively actuating jaws using screws with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2484—Supports

Definitions

  • the invention relates to a precision vise for a machine tool according to the preamble of claim 1.
  • clamping devices are known from the prior art and are used for fixing workpieces or components, for example on a machine table.
  • the workpiece to be machined by means of the machine tool must be clamped firmly and with the greatest possible accuracy to achieve the required precision, with high process reliability requiring absolute repeatability of the clamping and a constant final positioning of the clamped workpiece or component.
  • Known clamping devices for clamping workpieces or components are usually designed as a vice and comprise two clamping jaws, which are mounted linearly displaceable along a common axis in a base body of the vise and for clamping the component by rotation of a base body and extending along the axis extending drive spindle towards each other and for releasing the component away from each other can be adjusted.
  • the linear movement of the two jaws in a known manner such that the component is clamped in relation to the axis center in the vise center between the two jaws.
  • a center tensioner Such a vise for centric clamping a workpiece is referred to as a center tensioner.
  • the central plane lying centrally between the two clamping jaws forms the reference plane for the machining, for example milling, of the clamped component.
  • machining for example milling
  • Other vices provide for moving this clamping center a possibility of displacement of the entire body of the vise on the machine table. The disadvantage here is that such a displacement of the entire vise can hardly be done with the highest precision.
  • other vices it is possible to rotate about the axis rotatably mounted on the base body and fixed during operation along the axis mounted drive spindle for fine adjustment of the clamping center along the axis. This is done in particular by moving the drive spindle bearing bearing block on the body along the axis.
  • Such a vice is in the EP 0 742 081 B1 (Gerardi ).
  • a universal precision vise provided for a machine tool is described, having a base body accommodating precision slides equipped with interchangeable jaws, which have counter-rotating threaded bores with which a right-handed and a left-handed threaded portion of a drive spindle are engaged. Between the opposite threaded portions a circumferential groove is formed in the drive spindle.
  • a bearing block for rotatably supporting the drive spindle is provided, which includes the circumferential groove of the drive spindle like a bridge. The bearing block is attached to the bottom of the body of the vise.
  • the device comprises a vise body, in which two carriages are movable symmetrically to a central axis, each carrying a clamping jaw, with a drive spindle for both carriages.
  • the center plane forming the clamping center is adjustable by providing a spindle nut in one of the carriages which is designed as a screw bushing.
  • This threaded bush has an internal thread and an external thread. The internal thread of the screw bush engages in the external thread of the drive spindle, while the external thread of the screw bush engages in an internal thread of the carriage into which the screw bush is screwed.
  • the procurzisionsschraubstock for a machine tool has a base body, in particular with a U-shaped cross-section, whose lateral legs each have at least one guide groove on the opposite sides. Between the legs of the main body, two precision cutters equipped in particular with interchangeable clamping jaws are mounted linearly displaceably along a common axis in the guide grooves. Thus, the two precision carriages including the respective jaws can be linearly guided towards and away from each other.
  • the first of the two precision slides has a first threaded hole and the second of the two precision slides has a second threaded hole, each with an internal thread.
  • the threads of the two threaded bores, which extend along the common axis, are formed in opposite directions.
  • a Drive spindle which also extends along the common axis, has a first threaded portion engaging in the first threaded bore and an engaging into the second threaded bore, opposite second threaded portion, each with an external thread.
  • the drive spindle is axially mounted or storable on the base body such that the drive spindle is immovable along the axis, that is, axially fixed.
  • the drive spindle between the first threaded portion and the second threaded portion in a middle bearing block along the axis is axially fixed and rotatably mounted about the axis.
  • the bearing block is coupled or can be coupled to the base body so that it can not be displaced.
  • the drive spindle can also be stored in a lying outside of the two precision carriage section and connected to the base body, for example by means of a bearing block.
  • a threaded sleeve is arranged, which has the first precision slide associated with the first threaded bore.
  • the threaded sleeve is axially fixed in the first precision carriage along the axis and rotatably mounted about the axis - in particular by means of a tool.
  • the threaded sleeve during its rotation about its axis along the longitudinal axis immovable.
  • the rotatability is so inhibited or inhibited that there is no rotation of the threaded sleeve relative to the first precision carriage when turning the drive spindle for clamping or releasing the workpiece. This is hereinafter referred to as self-rotation inhibited.
  • the clamping center of the precision vise can be precisely fine-tuned.
  • the center of tension is to be understood as the middle between the two clamping surfaces of the clamping jaws or the surface on which the two clamping surfaces come to rest with the vice completely closed.
  • clamping means are arranged in the first precision carriage, by means of which the threaded sleeve rotatably coupled to the first precision carriage and can be decoupled.
  • the threaded sleeve is mounted axially by means of the clamping means in the first precision carriage, wherein the clamping means and the threaded sleeve are formed such that by the rotationally fixed coupling of the threaded sleeve with the first precision carriage by means of the clamping means the threaded sleeve relative to the precision carriage occupies a predetermined position in the direction along the axis , This predetermined position is determined in particular by a plane normal to the axis of the threaded sleeve.
  • the threaded sleeve is in particular immovable in its - especially by means of a tool or directly done manually - twisting about the axis along the axis.
  • the clamping means thus have several functions.
  • the threaded sleeve is mounted axially by means of the clamping means in the first precision slide, so that the threaded sleeve in the direction along the axis, if necessary with a certain play substantially immovable relative to the first precision slide, so it is axially fixed and rotated about the axis for fine adjustment of the clamping center can.
  • Threaded sleeve in the direction along the axis A precisely centered in the predetermined position and the clearance along the axis substantially reduced to zero.
  • the threaded sleeve always assumes the same position in the direction along the axis relative to the first precision slide.
  • the clamping means ensure a fixed axial fixing of the threaded sleeve along the axis, so that the threaded sleeve and the drive spindle along the axis of the spindle relative to the first precision slide immovable, that are axially fixed and large clamping forces between the threaded sleeve and the first precision carriage by means of the clamping means in the clamped State can be transferred.
  • the threaded sleeve is inhibited in its rotatability about the axis in the clamped state before self-rotation when adjusting the vise, in particular external rotatability, so that the adjusted position is fixed.
  • FIG. 1 a first possible embodiment of a precision vise 1 in the disassembled state without jaws in an oblique perspective view
  • FIG. 2 the first possible embodiment in the assembled state with mounted jaws also in an oblique view shows.
  • the following are the two FIGS. 1 and 2 described together.
  • the procurzisionsschraubstock 1 has a base body 2 having a U-shaped cross-section, the first lateral leg 3 and the second lateral leg 4 at the opposite inner surfaces each have a guide groove, namely the first guide groove 5 and the second guide groove 6, have.
  • the two legs 3 and 4 are connected via the base 32 of the base body 2.
  • a first precision carriage 9 and a second precision slide 10 along a common axis A to each other and away from each other linearly displaceable.
  • a first clamping jaw 7 and a second clamping jaw 8 are interchangeably mounted on the upper sides of the precision slides.
  • FIG. 2 9 and 10 a first clamping jaw 7 and a second clamping jaw 8 are interchangeably mounted on the upper sides of the precision slides.
  • the two base-surface-side surfaces 33 and 34 in turn span along the axis A two surfaces which together form a V-shaped cross-section open upwardly on the side of the clamping jaw.
  • a second threaded bore 12 In the second precision carriage 10 is a second threaded bore 12, whose longitudinal axis is the axis A.
  • a threaded sleeve 19 which has a cylindrical basic shape and a first threaded bore 11, arranged axially rotatable, wherein the longitudinal axis of the first threaded bore 11 is also the axis A.
  • the threaded sleeve 19 with the first threaded bore 11 is mounted in the first precision carriage 9 in such a way that it can be rotated axially about the axis A, that is to say essentially without displacement along the axis A.
  • the threaded sleeve 19 is immovable in the operating state of the precision vise along the axis A relative to the first precision slide 9, even if it is rotated about its axis, the axis A.
  • the detailed structure of this arrangement will be described in more detail below.
  • the thread of the second threaded bore 12 has the same pitch amount as the first threaded hole 11, but the threads of the two threaded bore 11 and 12 are formed in opposite directions.
  • a drive spindle 13 extends with an engaging in the first threaded bore 11 first threaded portion 15 and engaging in the second threaded bore 12, opposing second threaded portion 16.
  • the drive spindle 13 is axially fixed between the first threaded portion 15 and the second threaded portion 16 the axis A rotatably mounted in a central bearing block 14, in particular by means of roller bearings, so that in the center-tensioning operating state of the precision vise no displacement of the drive spindle 13 along the axis A relative to the central bearing block 14 is possible.
  • the middle bearing block 14 is non-displaceably coupled to the base body 2 by means of two threaded bolts 17.
  • the two threaded bolts 17 are passed through two opposite, transverse in the lateral legs 3 and 4 extending lateral transverse bores 26 and screwed into two opposite lateral threaded transverse bores 28 of the bearing block 14, so that the middle bearing block 14 is fixedly connected to the base body 2.
  • this connection decoupled wherein the middle bearing block 14 is slidably mounted between the legs 3 and 4 of the base body 2 along the axis A.
  • the two threaded bolts 17 serve in this case as releasable blocking means, by means of which the middle bearing block 14 can be coupled with the base body 2 so as to be displaceable and decoupled.
  • the described Rezisionsschraubstock 1 as a universal vise, the center span, with coupled middle bearing block 14 on festbackenspannend, with decoupled middle bearing block 14 and coupled to the base 2 jaw 7 or 8 or precision carriage 9 or 10, um vers is.
  • the precision vise 1 is always in the center-tensioned state - with a on the base body 2 via the threaded bolt 17 fixed middle bearing block 14 - described.
  • clamping means in the first Precision slides 9 provided, which are formed as follows.
  • the threaded sleeve 19 has an outer peripheral groove 23 in the form of a radially inwardly tapering, concave memoriskerbung.
  • the contact surfaces of the wedge clamps 20 and 21 and the outer circumferential groove 23 have such a shape that the wedge clamps 20 and 21 in the form of at least partially transversely to the outer circumferential groove 23 extending line or surface contact the outer circumferential groove 23 rotationally clamped, as shown in FIG. 1 seen. Due to the inwardly tapering, concave configuration of the outer circumferential groove 23 and the corresponding configuration of the wedge clamps 20 and 21 takes place in reducing the distance between the two wedge clamps 20 and 21 to each other centering the threaded sleeve 19 relative to the first precision carriage 9 along the axis A to the median plane ofpurposepartysnut 23, which median plane extends normal to the axis A. By clamping the threaded sleeve 19 is thus prevented not only at their free twistability, but also centered along the axis A.
  • the clamping screw 22 is tightened so tightly that due to the frictional rotation of the drive spindle 13 during clamping of a workpiece causes no rotation of the threaded sleeve 19 in the first precision slide 9 and the set clamping center Z remains constant.
  • the clamping action of the tangentially engaging in the inwardly tapering outer circumferential groove 23 wedge clamps 20 and 21 the threaded sleeve 19 is centered and fixed in the direction along the axis A with respect to the median plane of the outer circumferential groove 23.
  • the described clamping means have So in addition to the function of preventing the free rotatability of the threaded sleeve 19 and the axial bearing of the threaded sleeve 19 during twisting also the function to restore the threaded sleeve 19 in the direction along the axis A always again in the same position when restoring the clamping connection.
  • the threaded sleeve 19 always takes the same position relative to the first precision slide 9 along the axis A by clamping, so that a very precise precision adjustment of the clamping center Z is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Gripping On Spindles (AREA)
  • Machine Tool Units (AREA)

Claims (12)

  1. Etau de précision (1) pour une machine-outil, pour le serrage centré de pièces, avec
    • un corps de base (2),
    • deux chariots de précision (9, 10), montés de manière déplaçable linéairement, en rapprochement et en éloignement l'un de l'autre, le long d'un axe (A) commun, entre deux branches (3, 4) du corps de base (2),
    ○ au premier chariot de précision (9) étant associé, le long de l'axe (A), un premier trou taraudé (11), et
    ○ au deuxième chariot de précision (10) étant associé, le long de l'axe (A), un deuxième trou taraudé (12), dont le filetage présente un pas inverse du filetage du premier trou taraudé (11),
    • une broche d'entraînement (13), s'étendant le long de l'axe (A), montée en palier ou susceptible d'être montée en palier sur le corps de base (2), de manière à pouvoir tourner autour de l'axe (A) et, axialement, de manière que la broche d'entraînement (13) soit immobile le long de l'axe (A), avec
    ○ un premier tronçon fileté (15), s'engageant dans le premier trou taraudé (11), et
    ○ un deuxième tronçon fileté (16), à pas en sens inverse, s'engageant dans le deuxième trou taraudé (12),
    • une douille filetée (19), pour le réglage fin du centre de serrage de l'étau de précision (1), ladite douille filetée (19)
    ○ étant montée en palier dans le premier chariot de précision (9), de manière à pouvoir tourner autour de l'axe (A), et
    ○ présentant le premier trou taraudé (11),
    • des moyens de serrage (20, 21, 22), disposés dans le premier chariot de précision (9) et au moyen desquels la douille filetée (19) est susceptible d'être accouplée au premier chariot de précision (9), de manière assujettie en rotation, et susceptible d'être désaccouplée de celui-ci,
    caractérisé en ce que
    • la douille filetée (19) est montée en palier axialement dans le premier chariot de précision (9), à l'aide des moyens de serrage (20, 21, 22), et
    • les moyens de serrage (20, 21, 22) et la douille filetée (19) sont réalisés de manière que, grâce au couplage assujetti en rotation, la douille filetée (19) prenne, par rapport au premier chariot de précision (9), une position prédéterminée dans une direction orientée le long de l'axe (A).
  2. Etau de précision selon la revendication 1,
    caractérisé en ce que
    • la douille filetée (19) présente une gorge périphérique extérieure (23), et
    • les moyens de serrage sont réalisés sous forme d'au moins un élément en coin (20, 21) manoeuvrable, s'engageant dans la gorge périphérique extérieure (23), de manière que la douille filetée (19) puisse être couplée, de manière assujettie en rotation, au premier chariot de précision (9) et puisse en être désaccouplée, par une manoeuvre du au moins un élément en coin (20, 21).
  3. Etau de précision selon la revendication 2,
    caractérisé en ce que
    • la gorge périphérique extérieure (23) va en s'effilant, lorsqu'on évolue radialement vers l'intérieur,
    • le plan médian de la gorge périphérique extérieure (23) s'étend perpendiculairement à l'axe A, et
    • la position prédéterminée est déterminée grâce au plan médian.
  4. Etau de précision selon la revendication 2 ou 3,
    caractérisé en ce que
    le au moins un élément en coin (20, 21) est réalisé sous forme de deux éléments de serrage (20, 21) s'engageant tangentiellement dans la gorge périphérique extérieure (23), entourant au moins partiellement la douille filetée (19) dans la gorge périphérique extérieure (23) et dont l'espacement mutuel est réglable, la douille filetée (19) étant susceptible d'être couplée, de manière assujettie en rotation, au premier chariot de précision (9) et susceptible d'en être désaccouplée, par réglage de cet espacement.
  5. Etau de précision selon la revendication 1,
    caractérisé par
    une vis de serrage (22), dans le premier chariot de précision (9), guidée à travers un perçage (24) ménagé dans le premier élément de serrage (20) et s'engageant dans un trou taraudé (25) du deuxième élément de serrage (21).
  6. Etau de précision selon l'une des revendications 2 à 5,
    caractérisé en ce que
    • la gorge périphérique extérieure (23) va en s'effilant, lorsqu'on évolue radialement vers l'intérieur,
    • les éléments de serrage (20, 21) et la gorge périphérique extérieure (23) sont réalisés de manière que les éléments de serrage (20, 21) serrent la gorge périphérique extérieure (23), de manière centrée par rapport au premier chariot de précision (9), de manière bloquée en rotation et le long de l'axe (A), sous la forme d'un contact linéaire ou de surface, s'étendant au moins partiellement transversalement à la gorge périphérique extérieure (23).
    • la position prédéterminée est déterminée grâce au plan médian.
  7. Etau de précision selon l'une des revendications 1 à 6,
    caractérisé en ce que
    les éléments de serrage (20, 21) et la douille filetée (19) sont réalisés de manière que la douille filetée (19), lors de sa rotation autour de l'axe (A), soit immobile le long de l'axe (A).
  8. Etau de précision selon l'une des revendications 1 à 7,
    caractérisé par
    un élément de liaison (37), disposé sur la face frontale extérieure de la douille filetée (19), s'étendant dans la direction axiale, auquel un outil pour la rotation de la douille filetée (19) est susceptible d'être relié.
  9. Etau de précision selon la revendication 8,
    caractérisé en ce que
    l'élément de liaison est réalisé sous forme de trou à plusieurs pans intérieurs (37).
  10. Etau de précision selon l'une des revendications 1 à 9,
    caractérisé en ce que
    les chariots de précision (9, 10) présentent des mâchoires de serrage (7, 8) interchangeables.
  11. Etau de précision selon l'une des revendications 1 à 10,
    caractérisé par
    un bloc-palier (14) central,
    • couplé ou susceptible d'être couplé au corps de base (2) de manière immobilisée en translation le long de l'axe (A), et
    • bloc-palier (14) dans lequel la broche d'entraînement (13) est montée, entre le premier tronçon fileté (15) et le deuxième tronçon fileté (16), de manière à pouvoir tourner autour de l'axe (A) et montée de manière immobilisée en translation par rapport au bloc-palier (14), le long de l'axe (A).
  12. Etau de précision selon l'une des revendications 1 à 11,
    caractérisé en ce que
    • le corps de base (2) présente une section transversale en forme de U, dont des branches latérales (3, 4) présentent chacune, sur les côtés opposés, une rainure de guidage (5, 6),
    • les chariots de précision (9, 10) sont montés de manière déplaçable linéairement, en rapprochement et en éloignement l'un de l'autre dans les rainures de guidage (5, 6), entre les branches (3, 4),
    • les deux faces (30, 31), situées côté mâchoires de serrage, des deux rainures de guidage (5, 6) forment un plan commun, s'étendant parallèlement à la face de base (32) du corps de base (2), et
    • les deux faces (33, 34), situées côté face de base, des deux rainures de guidage (5, 6) forment deux plans avec une section transversale en forme de V, ouverte côté mâchoire de serrage, de manière que, lors du serrage, les deux chariots de précision (9, 10) se centrent centralement entre les branches (3, 4) du corps de base (2).
EP07101143A 2006-01-27 2007-01-25 Etau de précision pour machine-outil Active EP1813389B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1182006 2006-01-27

Publications (3)

Publication Number Publication Date
EP1813389A2 EP1813389A2 (fr) 2007-08-01
EP1813389A3 EP1813389A3 (fr) 2009-02-18
EP1813389B1 true EP1813389B1 (fr) 2010-04-14

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EP (1) EP1813389B1 (fr)
AT (1) ATE464157T1 (fr)
DE (1) DE502007003434D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017122112B4 (de) * 2017-09-25 2021-12-09 Lang Technik Gmbh Schraubstockvorrichtung
CN111070116B (zh) * 2019-12-19 2021-12-21 大连德迈仕精密科技股份有限公司 精密仪器用快速可调节夹持装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE575658C (de) * 1930-12-18 1933-05-02 Hermann Manthey Schnellspann- und Schnellhubvorrichtung fuer Maschinenschraubstoecke, Bremsen, Steuervorrichtungen u. dgl.
DE3925717A1 (de) * 1989-08-03 1991-02-07 Saurer Allma Gmbh Vorrichtung an maschinenschraubstoecken zum zentrischen spannen von werkstuecken
IT1274487B (it) * 1995-05-12 1997-07-17 Gerardi Spa Morsa di precisione universale per macchina utensile

Also Published As

Publication number Publication date
ATE464157T1 (de) 2010-04-15
EP1813389A3 (fr) 2009-02-18
DE502007003434D1 (de) 2010-05-27
EP1813389A2 (fr) 2007-08-01

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