EP1179392B1 - Elément de fixation et support - Google Patents

Elément de fixation et support Download PDF

Info

Publication number
EP1179392B1
EP1179392B1 EP20010111589 EP01111589A EP1179392B1 EP 1179392 B1 EP1179392 B1 EP 1179392B1 EP 20010111589 EP20010111589 EP 20010111589 EP 01111589 A EP01111589 A EP 01111589A EP 1179392 B1 EP1179392 B1 EP 1179392B1
Authority
EP
European Patent Office
Prior art keywords
hollow piston
piston
clamping
work
pressure
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.)
Expired - Lifetime
Application number
EP20010111589
Other languages
German (de)
English (en)
Other versions
EP1179392A2 (fr
EP1179392A3 (fr
Inventor
Josef Feulner
Klaus Richter
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
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 filed Critical Ludwig Ehrhardt GmbH
Publication of EP1179392A2 publication Critical patent/EP1179392A2/fr
Publication of EP1179392A3 publication Critical patent/EP1179392A3/fr
Application granted granted Critical
Publication of EP1179392B1 publication Critical patent/EP1179392B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive

Definitions

  • the invention relates to a clamping and supporting element, as it comes in particular for clamping easily deformable workpieces used.
  • Such hydraulic support elements have a displacement cylinder, so that when pressure dropping the piston via a compression spring the support pin moves with little force against the workpiece. Only when the piston has moved against the inner stop, there is a pressure increase in the hydraulic system. This leads to the support pin being clamped and firmly seated.
  • a clamping and supporting element which applies by means of a hydraulically acted in a cylinder guided piston, for example, a workpiece and holds this in position.
  • a hollow piston is guided in a cylinder housing so that due to the pressurization by the hydraulics in the extended state between the hollow piston and the cylinder housing frictional forces are built up, which hold the hollow piston against external influences in its position.
  • the invention has for its object to provide an alternative clamping and support element, so that the force acting on the workpiece by the upcoming holding force with an additionally generated force acts together so that regardless of the forces acting on the workpiece as a result of machining forces on Work fitting piston is held immovably in position during the entire machining process.
  • Fig. 1 shows an element with different piston cross-section.
  • a hollow piston 2 is guided in the cylinder housing 2.
  • the cylinder housing 2 is reproduced here in the form of a Einschraubversion.
  • a spring 3 is provided, which is tensioned during extension of the piston.
  • the wall of the hollow piston has different wall thicknesses over its length.
  • the hollow piston is provided in the lower and upper regions with a wall 4, which is not deformable by the forces acting on the piston.
  • the middle region of the hollow piston is provided with a wall 5 with a smaller cross-section. This wall 5 is deformable over its entire area. The deformable area is to be adapted in its effective length to the respective uses and circumstances.
  • the hollow piston 1 In the middle of the hollow piston 1 is a fixed core 8, which can be pulled at the same time to the piston guide with zoom. Via the hydraulic connection 9 the supply of the medium takes place, which first enters the cylinder pressure chamber 6 when pressurized. As a result, the hollow piston 1 is moved out of the cylinder housing 2 until it comes to rest on the workpiece. At the same time, however, part of the hydraulic system has entered the piston pressure chamber 7. If now the pressure is further built up, a pressure arises in the piston pressure chamber 7, through which the wall 5, which is tapered in the center region of the piston, is deformed and pressed against the inner wall of the cylinder housing 2. Thus, additional holding forces are created for the hollow piston 1, in the form of a frictional force, which results from the surface pressure of the contacting walls.
  • the forces acting on the workpiece are thus absorbed once by the pressure in the hydraulic system and secondly by the frictional forces built up.
  • the hollow piston 1 is so firmly held in its end position that it can not be driven back even with larger forces due to back forces.
  • the machining forces occurring on the workpiece are thus collected once by the upcoming hydraulic pressure and on the other by the frictional forces. This means that the force built up by the hydraulic must be just the size required to hold the workpiece in place.
  • the return forces that emanate from the machined workpiece can be greater than the holding force built up solely by the hydraulic system. The sum of the forces of holding force and friction force, however, ensure that the workpiece remains immovable during machining and thus does not change the position of the hollow piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Actuator (AREA)
  • Machine Tool Units (AREA)

Claims (2)

  1. Elément de serrage et de support à tenir des pièces à usiner facilement déformables moyennant d'un piston commandé par force hydraulique, qui est guidé à l'intérieur d'un cylindre et qui porte contre la pièce à usiner et maintient le dernier en sa position sans déformation, à un piston creux (1) étant guidé à l'intérieur d'une boîte cylindrique (2) d'une telle manière, qu'en état sorti, en vertu de la pression appliquée par le système hydraulique, des forces de frottement sont créées entre ledit piston creux et ladite boîte cylindrique, opposant des influences extérieures afin de tenir ledit piston creux en sa position, caractérisé en ce que ledit piston creux (1) est muni d'une paroi à section décroissant (5) dans sa zone centrale, cette paroi étant déformée sous l'effort d'une pression et pressant contre la paroi intérieure de ladite boîte cylindrique (2).
  2. Elément de serrage et de support selon la revendication 1, caractérisé en ce que ledit piston creux (1) est approché vers ladite pièce à usiner, sous l'influence de l'effort de la pression appliquée, en ce qu'ensuite, en vertu de la pression maintenue, une force de frottement est engendrée par les parties élastiquement déformables, qui agissent entre ladite boîte cylindrique (2) et ledit piston creux (1), et en ce que les forces hydrauliques et de friction en somme fixent la pièce à usiner en sa position.
EP20010111589 2000-05-19 2001-05-12 Elément de fixation et support Expired - Lifetime EP1179392B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10024981 2000-05-19
DE2000124981 DE10024981A1 (de) 2000-05-19 2000-05-19 Spann- und Stützelement

Publications (3)

Publication Number Publication Date
EP1179392A2 EP1179392A2 (fr) 2002-02-13
EP1179392A3 EP1179392A3 (fr) 2003-07-09
EP1179392B1 true EP1179392B1 (fr) 2007-11-21

Family

ID=7642904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010111589 Expired - Lifetime EP1179392B1 (fr) 2000-05-19 2001-05-12 Elément de fixation et support

Country Status (3)

Country Link
EP (1) EP1179392B1 (fr)
DE (2) DE10024981A1 (fr)
ES (1) ES2296683T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344615B1 (fr) * 2002-03-15 2007-07-18 Dienes Werke Für Maschinenteile Gmbh & Co Kg Support de lame permettant le blocage sans jeu de la lame
DE202016000391U1 (de) 2016-01-21 2016-02-29 Christof Steubing Abstützvorrichtung
DE202016002983U1 (de) 2016-05-06 2016-06-15 Christof Steubing Abstützvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2002563A1 (fr) * 1968-02-24 1969-10-17 Bemberg Ag
DE1901283A1 (de) * 1969-01-11 1970-07-30 Roemheld Kg A Stuetzbock zum Abstuetzen von Werkstuecken waehrend der Bearbeitung
CH668461A5 (de) * 1985-10-21 1988-12-30 Wyler Ag Lager, insbesondere fuer messeinrichtungen.
EP0899061A3 (fr) * 1997-08-29 2002-06-26 Schunk GmbH & Co. KG Fabrik für Spann- und Greifwerkzeuge Machoires de serrage et dispositif de serrage de pièces à travailler
US5957443A (en) * 1998-07-20 1999-09-28 Vektek, Inc. Hydraulic work support
JP4365469B2 (ja) * 1999-02-24 2009-11-18 パスカルエンジニアリング株式会社 油圧式ロック装置

Also Published As

Publication number Publication date
ES2296683T3 (es) 2008-05-01
EP1179392A2 (fr) 2002-02-13
EP1179392A3 (fr) 2003-07-09
DE50113285D1 (de) 2008-01-03
DE10024981A1 (de) 2001-11-22

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