EP2185322B1 - Etau a depression a plaque de travail souple maintenue par des plots - Google Patents

Etau a depression a plaque de travail souple maintenue par des plots Download PDF

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Publication number
EP2185322B1
EP2185322B1 EP08829167A EP08829167A EP2185322B1 EP 2185322 B1 EP2185322 B1 EP 2185322B1 EP 08829167 A EP08829167 A EP 08829167A EP 08829167 A EP08829167 A EP 08829167A EP 2185322 B1 EP2185322 B1 EP 2185322B1
Authority
EP
European Patent Office
Prior art keywords
chamber
plate
working plate
working
chuck 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.)
Active
Application number
EP08829167A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2185322A2 (fr
Inventor
Claude Barlier
Thibaut Jannot
Rudy Michel
Romain Siegel
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.)
Cirtes SRC SA
Original Assignee
Cirtes SRC SA
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 Cirtes SRC SA filed Critical Cirtes SRC SA
Publication of EP2185322A2 publication Critical patent/EP2185322A2/fr
Application granted granted Critical
Publication of EP2185322B1 publication Critical patent/EP2185322B1/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
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005—Vacuum work holders

Definitions

  • the invention mainly relates to the field of maintaining the workpieces on work tables and in particular the field of vacuum vices.
  • the vise must therefore allow the positioning and maintenance of very varied workpieces, which means that on the other hand that the fastening surface of the workpiece in the vice must deliver a constant holding force irrespective of the size of the workpiece and its geometry, and secondly that the workpiece must be located precisely in a direction perpendicular to the surface of the vise.
  • Another known constraint for the realization and design of the vises is that the holding operation must be carried out under optimal conditions from the point of view of the time required, either to maneuver the workpiece between two configurations of the vice, or to switch the parts between the already shaped element and an element to be machined, for example on a production line, cutting, drilling, grinding etc ...
  • the device responding to the above problems must also satisfy the general constraints of this type of tool namely a satisfactory distribution of the suction pressure on the work surface and optimal sealing of the points not covered by the surface to be maintained, while ensuring a reduced cost of operation of the process.
  • the invention therefore aims to solve these major difficulties by proposing a new vice operating by vacuum suction.
  • the prior art knows devices for holding parts or objects operating by vacuum suction.
  • the suction devices are shutter ball devices for closing or releasing the outlet of the suction ducts of the cells located under a support plate. These devices are complex to implement, with many parts to assemble and difficulties to ensure a reliable seal between the balls and the support plate of the part.
  • the membrane When maintaining a part, the underside of which may be flat or non-planar, the membrane may be crushed in several areas of the bearing surface. The stability of the part and its precise positioning in a direction perpendicular to the bearing surface can not be guaranteed.
  • said pads are removable and replaceable in case of wear or machining accident.
  • the vise according to the invention is connected to a suction device so as to vacuum press a workpiece (1) on a work surface and immobilize it.
  • the vise in its general form comprises at least one support plate (3) contiguous to a work plate (2).
  • the working surface is represented by the interface between the part to be held and the work plate.
  • the support plate (3) comprises a set of chambers, each chamber (4) being in communication with a suction device via a conduit (5), which conduit passes through the support plate (3) and is connected to a device generating a depression, for example a vacuum pump.
  • a conduit (5) as described in the invention may have any shape, that is to say of square section, oval or irregular, however the section is preferably circular and therefore the conduit of cylindrical shape.
  • the working plate (2) in contact with the part to be held is pierced with orifices (7), which orifices are in communication with underlying chambers (4) connected with the suction device, so that the vacuum generated by the suction device is applied to the working surface, under the part to be maintained, through the suction duct and said holes.
  • the working plate is a thin plate (2) of deformable material under the effect of a depression on one side of said thin plate and able to return by elasticity to its initial shape in the absence of pressure difference between both sides of the sheet.
  • the plate (2) is a sheet of material made of flexible material, for example a polymer sheet.
  • the plate (2) has a thickness of between 0.1 mm and 5 mm, and it is in one or more parts.
  • the plate (2) is pierced with orifices (7), the orifices (7) not being axially aligned with the conduits (5) so that an imperforate area (10) of the work plate deforms under the effect of a depression in an underlying chamber (4) when no part to be maintained is disposed at the outlet of the orifice (7) corresponding to this chamber.
  • the plate (2) is held at the periphery of each chamber (4) by a plurality of studs (8) of the support plate (3) engaging in perforations (9) of the working plate (2), said studs making contact between the support plate (3) and the part to be held (1), thus ensuring a reference for its positioning.
  • the figures show that, when the depression is switched on, the part to be held (1) comes to rest on the studs (8) surrounding a chamber (4) and the zone (10) placed above this chamber does not deforms, while the zones (10) located above the rooms not covered by the part (1) deform and close the ducts (7) located below said zones (10) which deform.
  • the deformable sheet acts as a sealing means and sealing around the chamber (s) (4) located (s) in the room.
  • the upper surfaces of the pads (8) which are in contact with the underside of the workpiece form a reference surface for precise positioning of the workpiece along an axis Oz perpendicular to the work plate (2).
  • the preferred and non-limiting form of the chambers (4) represented on the figure 4 allows to increase the number of suction points for an equivalent surface.
  • the system operates through two holes: a suction hole which is the perforation (7) of the membrane and a vacuum hole which is the mouth of the duct (5).
  • a suction hole which is the perforation (7) of the membrane
  • a vacuum hole which is the mouth of the duct (5).
  • the depression hole (5) must suck the flexible membrane to seal it tightly around its perimeter.
  • This operation is governed by the behavior of the material and in particular by its radius of plating. This radius is governed by a physical law of deformation of the material which is a function of the elasticity properties of the material, its thickness but also the geometry of the chamber and the level of depression.
  • the mouth of the duct (5) must (for a vacuum included in 0.95 and 1 bar and a material thickness of 1.5 mm) be placed in the center of a cylinder theoretical free radius of 10 to 14 mm and a height of 0.8 to 1.1 mm, free cylinder which defines the minimum chamber radius to be provided around the mouth of the duct (5).
  • the suction chamber forms having the best relationship between the optimization of the suction surface and the simplicity of manufacture are the ovoid forms with an acute end or radius of curvature weaker than the radius of curvature of the other end, recalling shapes in "egg" or "drop of water”.
  • the mouth of the duct (5) is placed in the widest part of the chamber while this chamber may be less wide under the face of the orifice (7).
  • This distribution makes it possible to reduce the size of each chamber and generates a naturally staggered shape of the chamber on all or part of the support plate (3), which further reduces the distance between two suction points.
  • the rooms of the same row are placed side by side with the narrowest part alternately on one side and the other of the direction of the row, and the chambers in a row are offset from those in the next and / or previous row.
  • the pads may be removable or dismountable, for example by screwing means.
  • This arrangement is particularly advantageous because it allows the adjustment of the height of the pads, especially when the work surface is a left surface, and / or allows the replacement thereof in case of wear or accident of machining.
  • Two variants may also be provided for an orifice (7), either a single hole (7a) or a surface element (6) perforated with a plurality of perforations or micro-perforations (7b), this variant acting as a flow accelerator and as a filter to stop chips and other machining residues and prevent them from entering the underlying chamber.
  • the vice there are no moving parts dependent on gravity which increases the holding possibilities, in particular it allows the use of the vice with a work surface vertically or in an oblique position for example for applications in robotics.
  • the part can even be maintained in the event of a vacuum cut.
  • the size of the vice, the thickness of the various plates, the power of the depression and the various dimensional parameters can be adjusted within a wide range without departing from the scope of the invention.
  • the vise according to the invention can also be used as a pneumatic valve or for object gripping, for example at the end of a robotic arm or on a conveyor chain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Manipulator (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Catching Or Destruction (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP08829167A 2007-08-29 2008-08-28 Etau a depression a plaque de travail souple maintenue par des plots Active EP2185322B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0757232A FR2920329B1 (fr) 2007-08-29 2007-08-29 Etau maintenant une piece par depression comportant un moyen d'obturation deplacable des conduits d'aspiration
PCT/FR2008/051538 WO2009030861A2 (fr) 2007-08-29 2008-08-28 Etau a depression a plaque de travail souple maintenue par des plots

Publications (2)

Publication Number Publication Date
EP2185322A2 EP2185322A2 (fr) 2010-05-19
EP2185322B1 true EP2185322B1 (fr) 2011-04-13

Family

ID=39253847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08829167A Active EP2185322B1 (fr) 2007-08-29 2008-08-28 Etau a depression a plaque de travail souple maintenue par des plots

Country Status (8)

Country Link
US (1) US8646764B2 (es)
EP (1) EP2185322B1 (es)
AT (1) ATE505299T1 (es)
CA (1) CA2696561C (es)
DE (1) DE602008006208D1 (es)
ES (1) ES2365030T3 (es)
FR (1) FR2920329B1 (es)
WO (1) WO2009030861A2 (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009044305A1 (de) * 2009-10-21 2011-05-05 Fooke Gmbh Verfahren zum Halten und Bearbeiten eines Werkstückes mit Spannplatte, sowie Vorrichtung zum Aussteifen eines Werkstückes mit Spannplatte
US8376334B1 (en) * 2011-10-26 2013-02-19 Swedcord Development AB Glue free vacuum sealing gasket structure
CN105108355B (zh) * 2015-09-18 2017-10-17 京东方科技集团股份有限公司 承载台、承载装置和激光切割设备
DE102020213943B4 (de) 2020-11-05 2023-09-28 Volkswagen Aktiengesellschaft Sauggreifvorrichtung zum Ansaugen eines Objekts
WO2022157965A1 (ja) * 2021-01-25 2022-07-28 日本電信電話株式会社 Ｕボルト及び施工方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197170A (en) * 1963-04-10 1965-07-27 Powers Chemco Inc Vacuum film support
US3335994A (en) * 1965-04-27 1967-08-15 Cocito Joe Michael Vacuum holder
US3765289A (en) * 1971-01-15 1973-10-16 Gerber Garment Technology Inc Vacuum hold-down apparatus
US3865359A (en) * 1972-05-01 1975-02-11 Dbm Industries Ltd Vacuum apparatus
SU650776A1 (ru) 1977-05-25 1979-03-05 Предприятие П/Я Р-6816 Вакуумный стол
US4221356A (en) * 1978-11-09 1980-09-09 Fortune William S Vacuum operated holding fixture
DE3140882A1 (de) * 1980-10-17 1982-05-27 Dai Nippon Insatsu K.K., Tokyo Vorrichtung zum befestigen einer offset-druckplatte oder einer aehnlichen platte in ebenem zustand durch unterdruck
SE443316B (sv) 1982-06-07 1986-02-24 Borislav Ilije Simic Med vakuum arbetande fixeringsanordning
US5035409A (en) * 1989-12-28 1991-07-30 Mpl Precision Limited Vacuum chuck
US5177857A (en) * 1990-05-17 1993-01-12 Fsk Inc. Method for holding an object to a surface using valve controlled vacuum force
DE9204704U1 (de) * 1992-04-02 1992-06-25 Kohlmeyer, Peter, 2053 Talkau Vakuumtisch
US5536559A (en) 1994-11-22 1996-07-16 Wisconsin Alumni Research Foundation Stress-free mount for imaging mask
US6405437B1 (en) * 1997-09-17 2002-06-18 Arvinmeritor, Inc. Apparatus and method for encasing an object in a case
JP2005003799A (ja) * 2003-06-10 2005-01-06 Fuji Photo Film Co Ltd 感光性板状部材吸着機構及び画像記録装置

Also Published As

Publication number Publication date
CA2696561C (fr) 2015-02-10
WO2009030861A2 (fr) 2009-03-12
CA2696561A1 (fr) 2009-03-12
DE602008006208D1 (de) 2011-05-26
WO2009030861A3 (fr) 2009-05-22
ATE505299T1 (de) 2011-04-15
FR2920329B1 (fr) 2009-12-18
US8646764B2 (en) 2014-02-11
US20110169206A1 (en) 2011-07-14
EP2185322A2 (fr) 2010-05-19
ES2365030T3 (es) 2011-09-20
FR2920329A1 (fr) 2009-03-06

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