EP1285730A2 - Dispositif de serrage de pièces - Google Patents

Dispositif de serrage de pièces Download PDF

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Publication number
EP1285730A2
EP1285730A2 EP20020102028 EP02102028A EP1285730A2 EP 1285730 A2 EP1285730 A2 EP 1285730A2 EP 20020102028 EP20020102028 EP 20020102028 EP 02102028 A EP02102028 A EP 02102028A EP 1285730 A2 EP1285730 A2 EP 1285730A2
Authority
EP
European Patent Office
Prior art keywords
piston
cavity
pressure
clamping element
element according
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Withdrawn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
EP20020102028
Other languages
German (de)
English (en)
Inventor
Josef Feulner
Dipl.-Ing. Oswald (FH) Thomas
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.)
Ludwig Ehrhardt GmbH
Original Assignee
Ludwig Ehrhardt GmbH
A Roemheld GmbH and Co KG
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 Ludwig Ehrhardt GmbH, A Roemheld GmbH and Co KG filed Critical Ludwig Ehrhardt GmbH
Publication of EP1285730A2 publication Critical patent/EP1285730A2/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Withdrawn legal-status Critical Current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
    • B25B1/18—Arrangements for positively actuating jaws motor driven, e.g. with fluid drive, with or without provision for manual actuation

Definitions

  • the invention relates to a clamping element for clamping workpieces with clamping jaws floating to the workpiece and hydraulic actuated pistons, which are connected to the jaws by slides or slides are.
  • Clamping elements are used when clamping workpieces this is where the workpiece is to be clamped in places and to support where deformations due to machining forces Workpiece can occur. These clamping elements have to be attached to the workpiece be applied that the clamping force from both sides simultaneously and is increased uniformly without a differential force occurring. clamping elements this type are called floating elements.
  • the clamping elements are usually operated hydraulically on the workpiece introduced. Here it is necessary to bring about an equalization for this ensures that the clamping jaws lie evenly on the workpiece and not cause unilateral forces that lead to deformation of the workpiece could.
  • the clamping jaws once applied to the workpiece are to be used during the Duration of the machining process also does not reduce their clamping force.
  • the clamping elements are constantly subject to external influences. These are through once the machining forces that act on the workpiece. On the other hand by the pressure in the hydraulic line, which can fluctuate and can also fail in extreme cases. Measures are to be taken here that this prevent.
  • the housing 1 there are two parallel cylindrical bores 2 admitted. A piston 3 is guided in each of these bores 2. Above the Bores 2 are two parallel slides 4 inserted in the housing 1. Each carriage 4 is equipped with a jaw 5. The movement of the sledge 4 is effected by a driver 6 each. This driver 6 is in a bore 7 embedded in the piston 3 so that it follows every movement of the piston.
  • the Cylinders in the housing are closed to the outside by two covers 8.
  • the piston 3 is a hollow piston with a cavity 10 which extends over a partial area is provided with a thin elastically deformable wall 9.
  • the cavity 10 is filled with a medium that is supplied via a connecting element 11 is, which with a throttle specifically designed for filling the cavity 12 is equipped.
  • Piston 3 and its connecting element 11 are over the Pressure port 13 applied.
  • In the housing 1 are 6 for the driver Recesses 14 admitted to the maximum stroke of the piston movement are limited. The piston movement is used for tensioning via the pressure connection 13 initiated and the pressure port 15 is acted upon to relax.
  • the hydraulic pressure that acts on the piston 3 ensures that the in the Connection element 11 lying throttle 12 slowly a pressure in the cavity 10 of the piston 3 builds.
  • the throttle 12 has the effect that the pressure rise is limited is.
  • This pressure increase in the cavity 10 has the consequence that the elastic deformable wall 9 to the outside and thus against the cylinder wall in the Hole 2 is pressed.
  • This slowly building up pressure initially no influence on the piston stroke, because at the beginning the frictional forces between the walls 9 and cylinder wall of the bore 2 are small.
  • the piston 3 has its end position reached, the pressure builds up inside the cavity 10 and presses now the wall 9 against the cylinder wall so that the frictional forces are so great be that the piston 3 is stuck in its position and not due to external influences can be moved.
  • the workpiece is now absolutely fixed.
  • FIG. 4; 5; 6. A further embodiment of the invention is shown in Fig. 4; 5; 6.
  • a cylinder bore 18 is made in which the two pistons 19; 20 led are.
  • a spring 21 is inserted, through which both Pistons are pressed outwards in the idle state.
  • the spring 21 is on one Side stored in a cylindrical extension 26 of the piston 20 and on the other side held in a recess 27 of the piston 19.
  • Between the two Piston is formed a space that is approximately the maximum stroke of the piston equivalent.
  • Each piston has a slide 22 with its clamping jaw 23 assigned. Between slide 22 and piston 19; 20 represents a driver 24 Connect. Both pistons are on the same pressure line 25th applied.
  • the cylinder chamber is on the housing sides by means of caps 31 lockable to the outside.
  • the piston 19 is a tubular body 28 in the extension of its axis assigned. This tubular body 28 makes any movement of the piston 19 with and is pushed over the extension 26 and thus fills the space between Extension 26 and cylinder bore 18 above the extension 26.
  • the diameter of the extension 26 is the inner diameter of the tubular Body 28 adjusted.
  • the tubular body 28 is of a certain length provided with a cavity 29 and over the entire area of the cavity thin-walled in the form of an elastically deformable skin 30. Der Cavity 29 is connected to the hydraulic connection of the pressure line 25, so that a pressure is built up inside as soon as the clamping unit with Pressure is applied.
  • the pressure will increase due to the pressure Hydraulic fluid increasingly passed into the cavity 29. This will make the elastically deformable skin 30 outwards against the walls of the housing 17th and pressed the surface of the extension 26 and thus braces both pistons 19; 20 in the housing.
  • the clamping element is therefore immovable with the workpiece set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
EP20020102028 2001-08-10 2002-07-11 Dispositif de serrage de pièces Withdrawn EP1285730A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10139520 2001-08-10
DE2001139520 DE10139520A1 (de) 2001-08-10 2001-08-10 Spannelement zum Spannen von Werkstücken

Publications (1)

Publication Number Publication Date
EP1285730A2 true EP1285730A2 (fr) 2003-02-26

Family

ID=7695150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020102028 Withdrawn EP1285730A2 (fr) 2001-08-10 2002-07-11 Dispositif de serrage de pièces

Country Status (2)

Country Link
EP (1) EP1285730A2 (fr)
DE (1) DE10139520A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1329283A3 (fr) * 2002-01-15 2003-10-29 ALLMATIC-Jakob GmbH & Co. Spannsysteme KG Système de serrage
CN103675547A (zh) * 2013-12-13 2014-03-26 苏州博众精工科技有限公司 一种数据传输装置
CN103707220A (zh) * 2013-12-13 2014-04-09 苏州博众精工科技有限公司 一种载具底座

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333408B3 (de) * 2003-07-15 2004-07-08 Schunk Gmbh & Co. Kg Fabrik Für Spann- Und Greifwerkzeuge Spann- oder Greifvorrichtung, insbesondere Fahrzeugfelgengreifvorrichtung
DE102006015273B9 (de) * 2006-04-01 2012-05-03 Andreas Maier Gmbh & Co. Kg Hydraulisches oder pneumatisches Werkstückspannsystem
CN110052636B (zh) * 2019-05-29 2023-12-19 刘明亮 一种自动抱紧型气液卡盘
CN110615276A (zh) * 2019-09-19 2019-12-27 常州工学院 一种二指平动抓手

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1329283A3 (fr) * 2002-01-15 2003-10-29 ALLMATIC-Jakob GmbH & Co. Spannsysteme KG Système de serrage
CN103675547A (zh) * 2013-12-13 2014-03-26 苏州博众精工科技有限公司 一种数据传输装置
CN103707220A (zh) * 2013-12-13 2014-04-09 苏州博众精工科技有限公司 一种载具底座

Also Published As

Publication number Publication date
DE10139520A1 (de) 2003-02-20

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Owner name: LUDWIG EHRHARDT GMBH

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Inventor name: OSWALD, DIPL.-ING. (FH) THOMAS

Inventor name: FEULNER, JOSEF

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Effective date: 20070201