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EP0623065B1 - Machoire profilee de serrage et procede de serrage de pieces - Google Patents

Machoire profilee de serrage et procede de serrage de pieces Download PDF

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Publication number
EP0623065B1
EP0623065B1 EP92923770A EP92923770A EP0623065B1 EP 0623065 B1 EP0623065 B1 EP 0623065B1 EP 92923770 A EP92923770 A EP 92923770A EP 92923770 A EP92923770 A EP 92923770A EP 0623065 B1 EP0623065 B1 EP 0623065B1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping jaw
base body
profiled
jaw 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.)
Expired - Lifetime
Application number
EP92923770A
Other languages
German (de)
English (en)
Other versions
EP0623065A1 (fr
Inventor
Hermann Püttmer
Peter Abraham
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.)
Goetze GmbH
Original Assignee
GOETZ METALL ANLAGEN
Goetze GmbH
Gotz 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 GOETZ METALL ANLAGEN, Goetze GmbH, Gotz GmbH filed Critical GOETZ METALL ANLAGEN
Publication of EP0623065A1 publication Critical patent/EP0623065A1/fr
Application granted granted Critical
Publication of EP0623065B1 publication Critical patent/EP0623065B1/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
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws
    • B25B1/241—Construction of the jaws characterised by surface features or material
    • B25B1/2415—Construction of the jaws characterised by surface features or material being composed of a plurality of parts adapting to the shape of the workpiece
    • B25B1/2421—Construction of the jaws characterised by surface features or material being composed of a plurality of parts adapting to the shape of the workpiece the parts having a linear movement

Definitions

  • the invention relates to a mold jaw for clamping workpieces of the type specified in the preamble of claim 1.
  • Clamping jaws are components of clamping devices, such as those required in vices, machine tools or machining centers for holding workpieces.
  • mold clamping jaws For clamping profile bars, in particular for window, door or facade construction, mold clamping jaws have so far been used, the surface contour of which is adapted to the contour of the workpiece to be clamped.
  • a special mold clamping jaw is produced, which must be exchanged in the relevant clamping device if the workpiece to be machined is changed. Because of the long changeover times, the known mold clamping jaws can therefore only be used economically in series production with medium and large batch sizes of at least 200 pieces, but not in single or small series production. This applies in particular to use with large row drilling and milling machines, in which a large number of clamping devices with form clamping jaws are used.
  • mold clamping jaws are known (US Pat. No. 3,211,445) which have a base body and have a clamping surface which is arranged on the base body and can be deformed by moving the base body against a workpiece until a clamping position is reached and can thereby be automatically adapted to the contour of the workpiece surface.
  • the clamping surface is composed of a multiplicity of pressure pieces which can be displaced independently of one another relative to the base body and can be locked thereon in the clamping position.
  • Each pressure piece is guided with a tension plunger in a thrust guide of the base body, the tension plungers each carrying a plunger piston engaging in a plunger cylinder of the base body and the plunger cylinders being acted upon with hydraulic fluid in the tensioning direction via a common hydraulic distributor.
  • the tension plungers each carrying a plunger piston engaging in a plunger cylinder of the base body and the plunger cylinders being acted upon with hydraulic fluid in the tensioning direction via a common hydraulic distributor.
  • the object of the invention is to improve the mold jaws of the type specified at the outset in such a way that adaptation to different workpiece contours is possible in a simple manner.
  • the solution according to the invention is based on the idea that a shut-off valve is arranged between the individual tappet cylinders and the hydraulic distributor and that the shut-off valves are acted on with the same pressure from a common hydraulic distributor.
  • the invention proposes that the shut-off valves each carry a control piston which can be acted upon on both sides with hydraulic fluid and which is arranged in a control cylinder, and that the control pistons can be acted upon with hydraulic fluid at their opposite piston surfaces via two separate hydraulic distributors.
  • the plunger pistons can operate at atmospheric pressure on their piston surface opposite the hydraulic distributor from the ambient air.
  • the one, preferably shut-off valve-side piston surface of the control pistons and the tappet pistons are expediently acted upon by hydraulic fluid from the same hydraulic distributor.
  • the mutually associated tappet cylinders and the control cylinders are aligned coaxially with one another, so that the shut-off valves are actuated axially to the tappet cylinders via their control pistons.
  • the hydraulic cylinders are arranged in a common cylinder block, while the shut-off valves are arranged in a common valve plate connected to the cylinder block, preferably screwed to it.
  • the control cylinders can in turn be arranged in a common cylinder plate connected to the valve plate, preferably screwed, on the side opposite the valve plate closed by a base plate. In this way it is possible with simple structural means to design the hydraulic distributor through a free space arranged between the valve plate and the cylinder plate, while a second hydraulic distributor communicating with the control cylinder can additionally be arranged as a free space between the valve plate and the base plate.
  • a cover plate which closes the cylinder block and forms the thrust guide, can be provided for the passage of the tensioning plunger, wherein a free space, which is connected to the plunger cylinders and preferably communicates with the atmosphere, can be left out between the cover plate and the cylinder block.
  • the mold clamping jaws according to the invention are used with particular advantage in clamping devices which have a block slide which can be moved on a machine frame in the clamping direction to a block stop which can preferably be adjusted via a central control according to the size of a workpiece to be clamped, and a form and which supports the mold clamping jaws in the clamping direction and can be moved Have tension slides.
  • the use of the mold clamping jaw according to the invention is also possible on a conventional vice. All that needs to be done is to fasten the base body of the mold clamping jaw to the clamping jaw of the vice.
  • Workpieces are clamped with the mold clamping jaws according to the invention in that the base body is first displaced against the workpiece and the clamping surface is deformed while automatically adapting to the contour of the workpiece surface, and in that the clamping surface is made non-deformable relative to the base body after clamping position and under clamping of the workpiece with a predetermined holding force is pressed against its surface.
  • This ensures that workpieces with largely any, even complicated, surface contours can be gripped in a force-locking and form-fitting manner with fully automatic handling under automatic tolerance compensation with a large-area system.
  • the mold clamping jaw 10 shown in the drawing consists essentially of a base body 12 and a clamping surface 14 which is composed of a plurality of pressure pieces 16 made of elastomeric material which can be displaced independently of one another relative to the base body 12.
  • the pressure pieces 16 are arranged at one end of a tensioning plunger 18, which is mounted in a slide guide 20 of the base body 12 so as to be displaceable in the stroke direction.
  • the clamping plungers 18 are moved hydraulically with their pressure pieces 16 into their starting position shown in FIG. 2 and locked in their clamping position with a hydraulically actuated shut-off valve 70.
  • the tappets 18 engage with a tappet piston 72 arranged at their rear end in a tappet cylinder 74 within the base body 12, which can be acted upon with hydraulic fluid via a hydraulic distributor 76 and the valve opening 80 delimited by the conical seat 78 of the shut-off valve 70.
  • the ram cylinders 74 preferably communicate with the ambient air via a distributor space 82 and the opening 84 '.
  • the valve needle 84 of the shut-off valve 70 is actuated via a control piston 90, which is guided in a control cylinder 86 and can be acted upon on both sides with hydraulic fluid from the distribution chambers 76 and 88.
  • the base body 12 is composed of a plurality of block-shaped or disk-shaped components which are connected to one another by means of a plurality of clamping screws 50 which are distributed over the circumference.
  • the clamping cylinders 74 are located in a common cylinder block 92, which is closed on the rod side by a cover plate 94 containing the slide guides 20 for the plungers 18 and an intermediate plate 96 containing the connection 84 'and the distributor space 82.
  • Is located on the bottom broad side surface of the cylinder block 92 a valve plate 98 with the valve seats 78, the valve openings 80 and a hydraulic connection 100 leading to the distributor space 76.
  • valve plate 98 On the side of the valve plate 98 opposite the cylinder block there is a cylinder plate 102 with the control cylinders 86 for receiving the control piston 90, which are additionally provided with recesses on the front Formation of the hydraulic distributor 76, 88 and a connection 104 leading to the hydraulic distributor 88 is provided and is closed on the outside by a base plate 106.
  • the function of the hydraulic mold clamping jaw is as follows: To extend the clamping plunger 18 into its starting position shown in FIG. 2, the distributor space 76 is pressurized with pressure oil via the connection 100, while the distributor space 88 is connected to the tank. As a result, the control pistons 90 with the valve needles 84 move from their blocking position shown in FIG. 3 into the open position according to FIG. 2. In this position, pressure oil passes from the distributor space 76 into the tappet cylinder 74 and drives the tappet 18 into its in FIG. 2 shown starting position.
  • the mold clamping jaw 10 is moved with its pressure pieces 16 against a surface to be clamped, the distributor space 76 being opened with the valves 70 open to the tank or against an elastic pressure accumulator in such a way that hydraulic fluid can be displaced from the clamping cylinders 74.
  • the distributor space 88 is pressurized via the connection 104 with pressure oil and thereby the valves 70 in their Locked position brought.
  • a certain hydraulic pressure can also be maintained in the distributor space 76.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Claims (11)

  1. Mâchoire de serrage profilée pour un dispositif de serrage, comprenant un corps de base (12) et une surface de serrage (14) disposée sur le corps de base, déformable par le déplacement du corps de base (12) contre une pièce à usiner (54) jusqu'à atteindre une position de serrage, avec adaptation automatique au contour de la surface de la pièce à usiner, qui est assemblée à partir d'une multiplicité de membres de pression (16) pouvant être déplacés indépendamment les uns des autres par rapport au corps de base (12) et arrêtés sur celui-ci dans la position de serrage, chaque membre de pression (16) étant guidé avec un poussoir de serrage (18) dans un guidage de poussée (20) du corps de base (12), les poussoirs de serrage (18) portant à chaque fois un piston de poussoir (72) s'engageant dans un cylindre de poussoir (74) du corps de base (12) et les cylindres de poussoir (74) pouvant être alimentés en fluide hydraulique dans la direction de serrage par l'intermédiaire d'un distributeur de fluide hydraulique (76) commun, caractérisée en ce qu'entre les différents cylindres de poussoir (74) et le distributeur de fluide hydraulique (76) est disposée à chaque fois une soupape d'arrêt (70), que les soupapes d'arrêt (70) portent respectivement un piston de commande (90) disposé dans un cylindre de commande (86) et pouvant être alimenté en fluide hydraulique sur les deux côtés, et que les pistons de commande (90) peuvent respectivement être alimentés ensemble, sur leurs surfaces de piston opposées, par l'intermédiaire de deux distributeurs de fluide hydraulique (76, 88) séparés.
  2. Mâchoire de serrage profilée selon la revendication 1, caractérisée en ce que les pistons de poussoir (72) sont soumis, sur leur surface de piston opposée au distributeur de fluide hydraulique (76), à la pression atmosphérique, de préférence de l'air ambiant.
  3. Mâchoire de serrage profilée selon la revendication 1 ou 2, caractérisée en ce que les pistons de poussoir (72) et les surfaces de piston des pistons de commande (90) situées de préférence du côté des soupapes d'arrêt, peuvent être alimentés en fluide hydraulique à partir du même distributeur de fluide hydraulique (76).
  4. Mâchoire de serrage profilée selon l'une des revendications 1 à 3, caractérisée en ce que les cylindres de poussoir (74) et cylindres de commande (86) associés sont orientés parallèlement à l'axe, de préférence coaxialement.
  5. Mâchoire de serrage profilée selon l'une des revendications 1 à 4, caractérisée en ce que les cylindres hydrauliques (74) sont disposés dans un bloc-cylindres (92) commun.
  6. Mâchoire de serrage profilée selon la revendication 5, caractérisée en ce que les soupapes d'arrêt (70) sont disposées dans une plaque à soupapes (98) commune rattachée au bloc-cylindres (92), de préférence vissée sur celui-ci.
  7. Mâchoire de serrage profilée selon la revendication 5 ou 6, caractérisée en ce que les cylindres de commande (74) sont disposés dans une plaque à cylindres (102) commune, rattachée à la plaque à soupapes (98), de préférence vissée sur celle-ci, et obturée du côté opposé à la plaque à soupapes, par une plaque de base (106).
  8. Mâchoire de Serrage profilée selon la revendication 7, caractérisée en ce qu'entre la plaque à soupapes (98) et la plaque à cylindres (102) est disposé un espace libre formant le distributeur de fluide hydraulique (76).
  9. Mâchoire de serrage profilée selon la revendication 7 ou 8, caractérisée en ce qu'elle comporte un espace libre disposé entre la plaque à soupapes (102) et la plaque de base (106) et formant un second distributeur de fluide hydraulique (88) qui communique avec les cylindres de commande (86).
  10. Mâchoire de serrage profilée selon l'une des revendications 1 à 9, caractérisée en ce qu'elle comporte une plaque de recouvrement (94, 96) obturant le bloc-cylindres du côté des membres de pression et présentant des ajours (20) pour le passage des poussoirs de serrage (18).
  11. Mâchoire de serrage profilée selon la revendication 10, caractérisée en ce qu'entre la plaque de recouvrement (94, 96) et le bloc-cylindres (92) est disposé un espace (82) relié du côté tige aux cylindres de poussoir (74) et communiquant de préférence avec l'atmosphère.
EP92923770A 1992-01-25 1992-11-23 Machoire profilee de serrage et procede de serrage de pieces Expired - Lifetime EP0623065B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4202032 1992-01-25
DE4202032 1992-01-25
PCT/EP1992/002687 WO1993014907A1 (fr) 1992-01-25 1992-11-23 Machoire profilee de serrage et procede de serrage de pieces

Publications (2)

Publication Number Publication Date
EP0623065A1 EP0623065A1 (fr) 1994-11-09
EP0623065B1 true EP0623065B1 (fr) 1997-04-02

Family

ID=6450246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92923770A Expired - Lifetime EP0623065B1 (fr) 1992-01-25 1992-11-23 Machoire profilee de serrage et procede de serrage de pieces

Country Status (8)

Country Link
US (1) US5551677A (fr)
EP (1) EP0623065B1 (fr)
JP (1) JPH07502935A (fr)
AT (1) ATE151000T1 (fr)
DE (1) DE59208305D1 (fr)
DK (1) DK0623065T3 (fr)
ES (1) ES2101130T3 (fr)
WO (1) WO1993014907A1 (fr)

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DE4311110A1 (de) * 1993-04-05 1994-10-06 Goetz Metall Anlagen Formspannbacken für eine Spannvorrichtung
US5722646A (en) 1995-08-29 1998-03-03 Cna Manufacturing Systems, Inc. Flexible tooling apparatus
GB9703082D0 (en) * 1997-02-14 1997-04-02 Dek Printing Machines Ltd Workpiece support device
US6202999B1 (en) 1997-02-14 2001-03-20 Dek Printing Machines Ltd. Workpiece support device
US6015247A (en) * 1997-12-17 2000-01-18 Branaman; Vincent E. Article assembly and alignment machine and method
US6250619B1 (en) 1998-02-03 2001-06-26 Cna Manufacturing Systems, Inc. Clamp suitable for use at high temperatures in a flexible tooling apparatus
US6264187B1 (en) 1998-10-13 2001-07-24 Galahad, Co. Method and apparatus for self-conforming support system
US6726195B1 (en) 1998-10-13 2004-04-27 Dek International Gmbh Method for ensuring planarity when using a flexible, self conforming, workpiece support system
EP1192848B1 (fr) 1999-06-21 2004-05-12 DEK International GmbH Accessoire d'outillage
US6711797B1 (en) 1999-06-21 2004-03-30 Dek International Gmbh Hydraulic tooling fixture
DE10026829C2 (de) * 2000-05-30 2003-02-20 Arthur Prib Vorrichtung zum Festspannen eines Werkstücks mit unebener Oberfläche
AU2003247906A1 (en) * 2002-07-08 2004-01-23 Airline Hydraulics Corporation Locking support fixture
US7444742B2 (en) * 2003-06-20 2008-11-04 Par Systems, Inc. Flexible fixture
DE10355555B4 (de) * 2003-11-21 2012-08-09 Hainbuch Gmbh Spannende Technik Spannbacken und Spanneinrichtung zum Spannen von Werkstücken
DE102004052951B4 (de) * 2004-10-29 2009-03-19 Uwe Bergmann Spannvorrichtung
US7942394B2 (en) * 2005-01-07 2011-05-17 Dek International Gmbh Locking support fixture
JP4304631B2 (ja) * 2006-07-31 2009-07-29 Ｓｍｃ株式会社 チャック装置
WO2011017652A2 (fr) * 2009-08-06 2011-02-10 Par Systems, Inc. Dispositif de serrage souple
FR2986450B1 (fr) * 2012-02-02 2014-12-05 Forest Line Albert Procede et dispositif d'usinage d'une piece rectiligne longue de section constante ou quasi constante
ES2747223T3 (es) * 2014-01-20 2020-03-10 Kobayashi Mft Co Ltd Aparato de plantilla
US9205533B2 (en) * 2014-04-21 2015-12-08 The Boeing Company Clamping method and apparatus
DE102017218877A1 (de) * 2017-10-23 2019-04-25 J. Schmalz Gmbh Werkstück-Haltevorrichtung sowie Werkstück-Handlingvorrichtung und maschinelle Anordnung zum Bearbeiten von Werkstücken mit einer Werkstück-Haltevorrichtung
US11022953B2 (en) 2019-05-07 2021-06-01 Cna Manufacturing Systems, Inc. Flexible tooling system
JP7531350B2 (ja) * 2020-05-22 2024-08-09 Thk株式会社 ワーク保持装置

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Also Published As

Publication number Publication date
DE59208305D1 (de) 1997-05-07
ES2101130T3 (es) 1997-07-01
DK0623065T3 (da) 1997-10-20
JPH07502935A (ja) 1995-03-30
US5551677A (en) 1996-09-03
EP0623065A1 (fr) 1994-11-09
ATE151000T1 (de) 1997-04-15
WO1993014907A1 (fr) 1993-08-05

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