EP2842691A1 - Mandrin de centrage - Google Patents

Mandrin de centrage Download PDF

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Publication number
EP2842691A1
EP2842691A1 EP20140182843 EP14182843A EP2842691A1 EP 2842691 A1 EP2842691 A1 EP 2842691A1 EP 20140182843 EP20140182843 EP 20140182843 EP 14182843 A EP14182843 A EP 14182843A EP 2842691 A1 EP2842691 A1 EP 2842691A1
Authority
EP
European Patent Office
Prior art keywords
clamping
center
spindle
tensioning device
clamping body
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.)
Withdrawn
Application number
EP20140182843
Other languages
German (de)
English (en)
Inventor
Dieter Mosig
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 EP2842691A1 publication Critical patent/EP2842691A1/fr
Withdrawn legal-status Critical Current

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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
    • B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
    • B25B1/125—Arrangements for positively actuating jaws using screws with provision for disengagement with one screw perpendicular to the jaw faces
    • 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
    • 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
    • B25B1/2494—Means indicating the distance between jaws or their angular position

Definitions

  • the invention relates to a center clamping device with two jaws which are adjustable centrally in a clamping direction in accordance with patent claim 1.
  • Center clamping devices serve for the centric clamping of workpieces to be machined on NC-controlled machine tools.
  • Such center clamping devices have two clamping jaws, which are adjustable in opposite directions via at least one threaded spindle, wherein the spindle is mounted in a centrally mounted on the table of the machine tool base plate.
  • 5-axis machines with rotary tables are often used to machine the workpieces.
  • a defined zero point is of course extremely important for the accuracy of the machining. Therefore, the two jaws, which are adjustable centrally in a tensioning direction, must always be equally spaced from a (usually vertical) axis passing through the system zero point.
  • base plates of center clamping devices of the type described must, in turn, be able to be accurately positioned on the table of a machine tool.
  • this is done today form-fit, for example via a so-called kingpin for a zero point system or via pin for mounting on a perforated plate.
  • the non-positive connection between the machine tool table and the center tensioning device is then carried out either via the low drawing force of the zero-point clamping system, over Spannpratzen or on the arranged in different hole patterns pins and screws.
  • the exact positioning of the center tensioning device on the machine tool table is not the main aspect of the present patent application. Rather, it is the adjustability of the center tensioner, but the need for precise adjustability to the machine center remains, of course.
  • EP-1'375'068 shows a center tension device with locking pins for mounting on a perforated plate.
  • the type of force application is in the foreground with this solution, it otherwise shows the functional principle of today's common center tension devices.
  • a disadvantage of systems of this type remains that the maximum clamping distance, ie the maximum distance between the clamping jaws, is limited in design to certain maximum values. If larger workpieces have to be machined, the center clamping device must be replaced as a whole.
  • the main advantage of the inventive solution is that after loosening the respective fastening devices, the two clamping bodies can be moved quickly to two other positions which are in turn symmetrical to a clamping system zero point and can be fastened there again in order to achieve a rapid change of the clamping width in this way.
  • This is possible because the splined shaft in the clamping direction engages linearly displaceable in the splined hub.
  • the symmetrical repositioning can be facilitated by a centric span scale.
  • FIG. 1 shows a longitudinal section through an inventive center clamping device with two centrally in a clamping direction S mutually adjustable jaws.
  • first clamping body 2 On a base plate 1 there is a first clamping body 2 with a first fastening device and a second clamping body 3 with a second fastening device.
  • the two clamping bodies 2, 3 can be positioned and fastened on the base plate 1 by means of the fastening devices.
  • the fastening devices consist of various individual components and will be explained in more detail below.
  • the first clamping body 2 has a first spindle 4, which is rotatably connected to the first clamping body 2.
  • the second clamping body 3 has a second spindle 5, which is rotatably connected to the second clamping body 3.
  • the spindles 4, 5 are rotatably mounted in the respective clamping bodies 2, 3, otherwise they remain stationary relative to the respective clamping bodies 2, 3.
  • first base jaw 6 On the first clamping body 2, a first base jaw 6 slidably disposed in the clamping direction S and on the second clamping body 3, a second base jaw 7 in the clamping direction S slidably disposed.
  • the counter-symmetrical displacement of the base jaws 6, 7 takes place in the usual way for center clamping devices of this kind by means of opposite thread 8 equal pitch between the spindles 4, 5 and the base jaws 6, 7.
  • the base jaws 6, 7 store on sliding surfaces 9, 10, partially visible in this figure.
  • essay jaws 11, 12 are fixed, between which the workpieces to be machined are clamped.
  • the second spindle 5 has a splined hub 13 extending in the clamping direction S.
  • the splined hub is in principle a recess extending in the axial direction of the spindle 5 and corresponding to the spindle shaft described below.
  • the center tensioning device has a spindle shaft which extends in the clamping direction S and is driven by the first spindle 4 and which is designed as a splined shaft 14 and which engages in the splined hub 13 in a linearly displaceable manner in the clamping direction S.
  • the splined shaft 14 and analogous to the splined hub 13 may in principle have any, but mutually matched wedge shape. Only the slidability in the splined hub and the positive engagement of the torque transmission from the splined shaft to the splined hub must be ensured.
  • the splined shaft 14 is rotatably but releasably connected to the first spindle 4.
  • the system also works without a quick coupling 15, ie with a fixed connection between splined shaft 14 and first spindle 4.
  • a quick coupling 15 is present, then in principle between the splined shaft 14 and the first spindle Extension elements (not shown) are still substantially used around the range of possible clamping spans in the center tensioning device to expand.
  • a quick coupling for example, a toothed coupling can be used, but other solutions such as coupling sleeves with threads are also possible.
  • the clamping bodies 2, 3 are fixed for use, but can be positioned and releasably connected to the base plate 1 by means of fastening devices.
  • the fastening grooves 18 serve to receive retractable (not shown) clamping bodies.
  • the first and the second fastening device each comprise positioning devices 19 attached to the clamping bodies 2, 3 and clamping screws 20 (see Fig. 2 ).
  • the positioning devices 19 cooperate with the toothed rack 17 and allow a grid-like positioning of the clamping bodies 2, 3 on both sides of a clamping system zero point 21 corresponding to the toothing of the rack.
  • clamping screws 20 cooperate with the insertable into the mounting grooves 18 clamping bodies and serve the fixed tension of the clamping body 2, 3 at the set positions.
  • this tensioning takes place when the symmetry of the clamping bodies 2, 3 is established with respect to the clamping system zero point, that is, when both clamping bodies 2, 3 are symmetrically positioned clamping system zero point.
  • the positioning means 19 comprise by means of eccentric parts lowerable toothed segment parts 22, which are able to intervene in the rack 17 and thus enable a grid-accurate positioning of the clamping body relative to the clamping system zero point or Center Spanner center.
  • the positioning devices 19 can be operated via pivot pins with hexagon socket 23. Relieved is a symmetrical repositioning of the clamping body 2, 3 by a centric clamping width scale 24th
  • the positioning device 19 of one of the clamping bodies 2, 3 relative to the respective clamping body is slidably disposed in the axial direction by means of an adjusting device to allow a subsequent adjustment of the centering of the center clamping device relative to the clamping system zero point.
  • This post-adjustment is done via an adjusting screw and includes only a small adjustment 25th
  • An Allen key or a lever tool introduces a torque into the force introduction device 16, which, as already mentioned earlier, comprises a slip clutch and a planetary gear.
  • the torque introduced is transmitted through the slip clutch.
  • the torque in the planetary gear is translated, for example, to a multiple.
  • the remaining torque is transmitted via the quick coupling 15 and the splined shaft 14 to the second spindle 5 and thus to the second base jaw 7.
  • the two base jaws 6, 7 move absolutely synchronously open and closed.
  • the toothed segment parts 22 are raised via eccentric elements. Subsequently, the clamping screws 20 of the clamping body 2, 3 are released. By means of the clamping width scale 24 on the base plate 1, the clamping bodies are positioned on a new raw material. Then the toothed segment parts 22 are lowered again at the two positioning devices 19 via the eccentric elements in order to engage the rack 17 again. Finally, the clamping screws 20 are tightened again.
  • the splined shaft 14 By loosening the quick coupling 15, the splined shaft 14 is separated from the first spindle 4. Then, the splined shaft 14 can be axially retracted into the second spindle 5. Then one performs a quick adjustment according to (b), so that an extension element between the two clamping bodies 2, 3 can be retracted. Finally, the extension element is connected via the quick coupling 15 with the first spindle 4 and the splined shaft 14 is connected via a further quick coupling 15 with the extension element.
  • the center clamping device can be adjusted exactly to the machine center.
  • several center clamping devices can be aligned with each other exactly. If the toothed segment part 22 of the positioning device 19 of the first clamping body 2 (in the case of loosened clamping screws 20) engages in the toothed rack 17, the relative position of the first clamping body 2 relative to the positioning device 19 can be set via the adjusting screw (which acts in the adjustment region 25). By actuating the adjusting screw thus the first clamping body 2 is moved. In this way, the exact symmetry or the exact centering of the clamping body 2, 3 and the top jaws 11, 12 with respect to the clamping system zero point 21 is produced.
  • center tensioning device as an eccentric tensioning device. This is done by non-use or by non-use of the quick coupling (15) or the splined shaft (14). In this case, the second clamping body 3 including the second base jaw (7) simply remains stationary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
EP20140182843 2013-09-02 2014-08-29 Mandrin de centrage Withdrawn EP2842691A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01489/13A CH708548A1 (de) 2013-09-02 2013-09-02 Zentrumsspanneinrichtung.

Publications (1)

Publication Number Publication Date
EP2842691A1 true EP2842691A1 (fr) 2015-03-04

Family

ID=49263068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20140182843 Withdrawn EP2842691A1 (fr) 2013-09-02 2014-08-29 Mandrin de centrage

Country Status (2)

Country Link
EP (1) EP2842691A1 (fr)
CH (1) CH708548A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107042417A (zh) * 2017-05-22 2017-08-15 杨煜海 一种用于汽车轮毂加工的固定装置
CN107717134A (zh) * 2017-10-27 2018-02-23 绍兴柯桥雷霄机械科技有限公司 一种用于机械齿轮加工的抛光设备
CN114799678A (zh) * 2022-03-31 2022-07-29 广船国际有限公司 一种凹槽板装配用工装及使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109531019B (zh) * 2019-01-09 2020-07-28 日照职业技术学院 一种适用于汽车零件用的电气自动化夹具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375068A2 (fr) * 2002-05-31 2004-01-02 Hemo-Werkzeugbau Dieter Mosig Dispositif de serrage et centrage
EP1787756A2 (fr) * 2005-11-18 2007-05-23 Vischer & Bolli AG Dispositif de serrage
DE202010010867U1 (de) * 2010-07-30 2011-11-02 Gressel Ag Spannvorrichtung mit Kraftverstärkung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135271B (de) * 1959-10-20 1962-08-23 Wilhelm Hammer Einrichtung zum Verankern von auf der Aufspannflaeche eines Werkzeugmaschinentischesangeordneten Spannstoecken
FR1443185A (fr) * 1965-04-07 1966-06-24 Perfectionnements aux étaux pour machines-outils et applications analogues

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375068A2 (fr) * 2002-05-31 2004-01-02 Hemo-Werkzeugbau Dieter Mosig Dispositif de serrage et centrage
EP1787756A2 (fr) * 2005-11-18 2007-05-23 Vischer & Bolli AG Dispositif de serrage
DE202010010867U1 (de) * 2010-07-30 2011-11-02 Gressel Ag Spannvorrichtung mit Kraftverstärkung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107042417A (zh) * 2017-05-22 2017-08-15 杨煜海 一种用于汽车轮毂加工的固定装置
CN107717134A (zh) * 2017-10-27 2018-02-23 绍兴柯桥雷霄机械科技有限公司 一种用于机械齿轮加工的抛光设备
CN107717134B (zh) * 2017-10-27 2024-02-02 长沙市雨花区虹德精工机械有限公司 一种用于机械齿轮加工的抛光设备
CN114799678A (zh) * 2022-03-31 2022-07-29 广船国际有限公司 一种凹槽板装配用工装及使用方法
CN114799678B (zh) * 2022-03-31 2023-12-08 广船国际有限公司 一种凹槽板装配用工装及使用方法

Also Published As

Publication number Publication date
CH708548A1 (de) 2015-03-13

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