EP1813389A2 - Etau de précision pour machine-outil - Google Patents

Etau de précision pour machine-outil Download PDF

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Publication number
EP1813389A2
EP1813389A2 EP07101143A EP07101143A EP1813389A2 EP 1813389 A2 EP1813389 A2 EP 1813389A2 EP 07101143 A EP07101143 A EP 07101143A EP 07101143 A EP07101143 A EP 07101143A EP 1813389 A2 EP1813389 A2 EP 1813389A2
Authority
EP
European Patent Office
Prior art keywords
precision
axis
threaded sleeve
clamping
threaded
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.)
Granted
Application number
EP07101143A
Other languages
German (de)
English (en)
Other versions
EP1813389B1 (fr
EP1813389A3 (fr
Inventor
Wilhelm Erhard
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 EP1813389A2 publication Critical patent/EP1813389A2/fr
Publication of EP1813389A3 publication Critical patent/EP1813389A3/fr
Application granted granted Critical
Publication of EP1813389B1 publication Critical patent/EP1813389B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • Such 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 in order 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 shows a first possible embodiment of a precision vise 1 in the disassembled state without jaws in an oblique perspective view
  • Figure 2 shows the first possible embodiment in the assembled state with mounted jaws also in an oblique view.
  • the two figures 1 and 2 are 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. Between the two legs 3 and 4 are in the guide grooves 5 and 6, 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 replaceably mounted on the upper sides of the precision slides 9 and 10.
  • FIG. 1 As can also be seen in FIG.
  • the first and second guide grooves 5 and 6 which correspond to one another, have first and second clamping-jaw-side upper surfaces 30 and 31 respectively and first and second base-surface-side surfaces 33 and 33, respectively 34.
  • the two clamping-jaw-side surfaces 30 and 31 of the two guide grooves 5 and 6 span a common plane which extends parallel to the base surface 32 of the base body 2.
  • 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.
  • the precision vice 1 provides for the rotatability of the threaded sleeve 19 in the first precision slide 9 as described below.
  • 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 rotatably clamped, as shown in FIG. 1 can be 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)
  • Machine Tool Units (AREA)
  • Gripping On Spindles (AREA)
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 true EP1813389A2 (fr) 2007-08-01
EP1813389A3 EP1813389A3 (fr) 2009-02-18
EP1813389B1 EP1813389B1 (fr) 2010-04-14

Family

ID=37964365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07101143A Active EP1813389B1 (fr) 2006-01-27 2007-01-25 Etau de précision pour machine-outil

Country Status (3)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017122112A1 (de) * 2017-09-25 2019-03-28 Thiemo Kretzschmar Schraubstockvorrichtung
CN111070116A (zh) * 2019-12-19 2020-04-28 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

Citations (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.
EP0411472A1 (fr) * 1989-08-03 1991-02-06 Saurer-Allma GmbH Dispositif sur des étaux de machines pour serrer et centrer des pièces à usiner
EP0742081A2 (fr) * 1995-05-12 1996-11-13 GERARDI S.p.A. Etan universel de précision pour une machine-outil

Patent Citations (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.
EP0411472A1 (fr) * 1989-08-03 1991-02-06 Saurer-Allma GmbH Dispositif sur des étaux de machines pour serrer et centrer des pièces à usiner
EP0742081A2 (fr) * 1995-05-12 1996-11-13 GERARDI S.p.A. Etan universel de précision pour une machine-outil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017122112A1 (de) * 2017-09-25 2019-03-28 Thiemo Kretzschmar Schraubstockvorrichtung
DE102017122112B4 (de) 2017-09-25 2021-12-09 Lang Technik Gmbh Schraubstockvorrichtung
CN111070116A (zh) * 2019-12-19 2020-04-28 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

Also Published As

Publication number Publication date
EP1813389B1 (fr) 2010-04-14
EP1813389A3 (fr) 2009-02-18
ATE464157T1 (de) 2010-04-15
DE502007003434D1 (de) 2010-05-27

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