EP0596179B1 - Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal - Google Patents

Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal Download PDF

Info

Publication number
EP0596179B1
EP0596179B1 EP92811021A EP92811021A EP0596179B1 EP 0596179 B1 EP0596179 B1 EP 0596179B1 EP 92811021 A EP92811021 A EP 92811021A EP 92811021 A EP92811021 A EP 92811021A EP 0596179 B1 EP0596179 B1 EP 0596179B1
Authority
EP
European Patent Office
Prior art keywords
shaft
diamond
clutch
correction
toolholder
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
EP92811021A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0596179A1 (fr
Inventor
Maurice Guenin
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.)
Voumard Machines Co SA
Original Assignee
Voumard Machines Co 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 Voumard Machines Co SA filed Critical Voumard Machines Co SA
Priority to EP92811021A priority Critical patent/EP0596179B1/fr
Priority to DE69200165T priority patent/DE69200165T2/de
Priority to ES92811021T priority patent/ES2056701T3/es
Priority to US08/166,825 priority patent/US5497759A/en
Priority to JP5344694A priority patent/JP2684329B2/ja
Publication of EP0596179A1 publication Critical patent/EP0596179A1/fr
Application granted granted Critical
Publication of EP0596179B1 publication Critical patent/EP0596179B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/08—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like

Definitions

  • the present invention relates to a drive device for a diamond holder with angular and longitudinal movement, used in particular on grinding machines.
  • this device is particularly advantageous for carrying out dressing operations on parts comprising concave and / or convex portions with or without a straight portion.
  • the high precision obtained thanks to the device allows tools to be drawn up for machining parts requiring a neat finish, such as high precision bearings.
  • Document EP-0 304 152 describes a multi-motor drive device for a diamond holder with angular and longitudinal movement.
  • the design of this device, with a drive using a first motor to carry out the angular displacements and a second motor to carry out the longitudinal displacements, is complex and bulky. Indeed, to transmit the two types of movement to the diamond holder, the mechanism described comprises many parts, thus very negatively affecting the cost of manufacturing the machine as well as its precision.
  • the object of the invention is to propose a single-engine device comprising in particular a clutch making it possible to couple or to decouple a main shaft and a correction shaft, means (eg a cam / probe assembly) transforming the rotary movement of the correction shaft into longitudinal movement of the diamond holder so that when the correction shaft and the main shaft connected by the clutch rotate simultaneously, the diamond holder performs only an angular movement ; when the two shafts are decoupled and only one of the two shafts rotates, the diamond holder performs either only a longitudinal movement, or both a longitudinal and angular movement.
  • a clutch making it possible to couple or to decouple a main shaft and a correction shaft
  • means eg a cam / probe assembly
  • the device according to the invention allows the correction as well as the programming of the radius (longitudinal distance relative to the part) or of the angular movement from the machine control panel and thereby improves convenience and safety during adjustments, by limiting manual operations inside the protected operational enclosure of the grinding machine.
  • the gain of an engine makes it possible to reduce the dimensions of the device, which allows a more rational use of the workspace; the available longitudinal stroke increases the flexibility of use by allowing the machining of a very wide range of different parts; this also makes it possible to economically produce small series of parts with frequent set-up changes.
  • FIG. 5 This perspective view makes it possible to understand the functional role of the main elements of the device.
  • a motor 14 rotates a main axis 2 by means of a drive means 3. Means described later make it possible to couple a correction shaft 1 to the main shaft or to dissociate them while making one of the two trees (the one that remains fixed during the radius correction operation) secured to the frame.
  • a diamond holder 32 is arranged under the main shaft by means of an adapter 2a, on which the diamond holder can slide longitudinally. When the two shafts are coupled, the diamond holder is driven in rotation by the main axis so that the diamond moves angularly along the contour of the workpiece. When the two shafts are decoupled, the diamond holder moves longitudinally so that the diamond moves away or approaches the workpiece. This gives great flexibility in moving the diamond, which makes it possible to carry out dressing operations on practically any shape of workpiece.
  • FIGS. 1 to 4 are described below.
  • Figure 1 shows the main elements of a preferred embodiment of the device according to the invention.
  • An internal correction axis 1 is disposed centrally in a main hollow axis 2.
  • Bearings 7 ball, roller or another type maintain the axis 1 while allowing its rotation in the shaft 2.
  • the axis 1 is maintained by at least 2 bearings spaced apart from each other: a first bearing of the radial type arranged along the axis, and a second bearing, preferably of the axial-radial type, preferably arranged at the lower end of the shaft 1
  • a first bearing of the radial type arranged along the axis
  • a second bearing preferably of the axial-radial type, preferably arranged at the lower end of the shaft 1
  • the lower part of the axis 2 extends under the frame 10 and ends with an adapter 2a, fixed to the lower end of the shaft.
  • the adapter 2a makes it possible to connect the various mobile elements of the device to the shaft 2. The latter can therefore drive all of these elements in rotation with it.
  • the axis 2 then extends upward over at least a portion of the length of the axis 1.
  • the axis 2 is fixed to the frame 10 of the device by means of at least two ball bearings 8, roller or other, spaced, of the radial type.
  • the assembly of shafts 1 and 2 into each other by means of bearings allows either an independent rotation of the two shafts, or a simultaneous rotation of these.
  • the type of rotation depends on the coupling or the relative decoupling of the two shafts. This coupling is achieved by a clutch 20 described later.
  • the axis 2 is rotated by a drive means 3 of a known type. It may for example be a belt, a chain, or a series of gears, associated with an electric or hydraulic motor 14. Said belt therefore bypasses a narrow portion of the shaft 2, the contour of which is preferably adapted in a known manner, for example with borders, so that the belt remains well positioned during rotation.
  • a drive means 3 of a known type. It may for example be a belt, a chain, or a series of gears, associated with an electric or hydraulic motor 14. Said belt therefore bypasses a narrow portion of the shaft 2, the contour of which is preferably adapted in a known manner, for example with borders, so that the belt remains well positioned during rotation.
  • a clutch seal 2b is attached to the upper end of the main shaft.
  • Said seal is advantageously shaped like an inverted bell so that the end portion of this bell has a flat part, perpendicular to the axis of the shaft, serving as the driving clutch surface 6.
  • a disc 4, centered and fixed to the upper part of the correction axis 1, includes a clutch driving surface 5, formed on the lower peripheral surface of the same disc, so as to be concomitant with the driving driving surface 6.
  • the disc 4 is flexible, thanks to the presence of a thinned part extending around the central core.
  • the disc is arranged so that the driven clutch surface 5 bears on the drive clutch surface 6, exerting sufficient pressure to allow the drive of the correction shaft.
  • the flexibility of the disc allows the clutch surface to be driven to be raised, so that the two clutch surfaces are no longer in contact.
  • a spring means (not shown) linked on the one hand to the axis 1 and on the other hand to the clutch disc 4 exerts a force on the latter tending to pushing the disc 4 against the clutch driving surface 6.
  • the clutch driving surface 5 comes into contact with the clutch driving surface 6, thus connecting the two shafts.
  • the spring means allows the disc to be slightly raised so that the two clutch surfaces are no longer in contact.
  • the device comprises a clutch system 20 making it possible to separate said axes.
  • This system is also illustrated in FIG. 1. It comprises at least one pusher 22 actuated by means 21 of known type, such as for example hydraulic means (as shown in FIG. 1), electro-mechanical, or others.
  • the pushers 22 are arranged in guide bores placed symmetrically with respect to the axis of rotation of the device in the frame 10 of the machine so as to be able to slide up or down along a given stroke.
  • the pushers act on a clutch ring 23 connected to the rest of the device by a membrane 23a whose purpose is to make said ring radially integral with the frame 10 while being axially free.
  • the clutch ring 23 exerts no force on the disc 4, so that the clutch driving surface 5 of the latter presses on the clutch driving surface 6.
  • the two trees are then united one of the other.
  • the clutch system is activated to be in the raised position, the pusher 22 is raised and the clutch ring 23 comes into contact with the disc 4 and lifts it.
  • the two clutch surfaces 5 and 6 are then no longer in contact, thus separating the axes 1 and 2.
  • the correction shaft 1 is then fixed radially to the frame by its connection with the crown 23.
  • the diamond holder rotates and moves simultaneously longitudinally by the action of the cam 34 on the feeler 31, as described later.
  • the pusher 22 and the crown 23 are lowered either only by the action of the gravitational force, or by the action of a return spring (not shown), or also by the action hydraulic, electromechanical, or other means 21 mentioned above, driving the various elements down.
  • the device according to the invention also comprises an encoder, an element known in the art, with a rotary part 9, and a fixed part 11.
  • the rotary part generally in the form of a ring, is dimensioned so as to be able to fit on the main shaft 2, at an advantageous location along the axis, such as at the top of it, as shown in Figure 1.
  • the fixed part 11 is arranged in the immediate vicinity of the rotating part, at a given angular position.
  • the latter can slide longitudinally along said slider. This longitudinal movement is guided by a cam 34 / feeler 31 system.
  • the cam 34 is arranged at the lower end of the correction shaft 1.
  • the feeler 31, is arranged so as to press laterally against the edge of the cam. During the rotation of the latter, the probe moves longitudinally following the contour of the cam.
  • a spring means 35 pulls the probe towards the axis of rotation of the cam, thus holding the probe against the cam. In this way, the probe can move in both directions, approaching or moving away from the axis of rotation of the cam.
  • the diamond holder 32 is disposed under the slide 30.
  • the feeler 31 is connected to the diamond holder, which allows the transmission of the longitudinal movement to the diamond holder. The amplitude of the longitudinal displacement depends directly on the profile of the said cam and on the rotation of the latter relative to the probe 31.
  • a diamond 33 is fixed laterally at the base of the diamond holder 32 so as to be in the working axis, thus making it possible to carry out the dressing operation on the part 40.
  • the device according to the invention is completed by an angular position detector 12, disposed near the clutch disc 4.
  • This detector of known type, makes it possible to determine the angular position of the correction shaft relative to the main shaft during the homing step, thanks to the presence of at least one angular position reference 13 arranged on the periphery of the disc 4.
  • the operation of the device according to the invention is controlled by a control means, preferably by the digital control of the machine tool, as is often the case for the devices known to date.
  • the homing making it possible to determine the exact position of the diamond with respect to the workpiece, is carried out in a known manner, preferably under the control of the digital control, as for example in the manner demonstrated in Requirement European patent EP 0 512 956 A1.
  • Figure 4 illustrates the types of movements that the diamond holder can make using the device according to the invention.
  • the arrow A indicates an angular displacement around the radius or the surface to be dressed.
  • the arrow B indicates a longitudinal movement allowing the diamond to approach or move away from the workpiece.
  • this first embodiment of the device it is possible to execute either only an angular displacement, or a simultaneous angular and longitudinal displacement. Thanks to its various combinations of movements, it is possible to carry out dressing operations by following a multitude of shapes, including straight edges, with constant or variable radius or combinations of these shapes.
  • the two axes are coupled.
  • the main axis 2 is driven by the drive means and rotates at a given speed, carrying with it the correction axis 1.
  • the two axes thus have an identical angular speed and there is therefore no relative movement between the two.
  • the diamond holder 32 therefore follows the main shaft in its angular movement.
  • the two axes are independent.
  • the main axis 2 is driven by the drive means and rotates at a given speed, while the correction shaft 1 is held in a fixed position by the clutch crown 23.
  • the correction cam 34 which rotates relative to the probe 31, acts on the latter by pushing it laterally along of its outline.
  • the transmission of the movement by the cam is well shown in FIG. 1A.
  • the probe linked to the diamond holder, guides the longitudinal movement of the latter. Since the main axis is also in rotation, a longitudinal displacement and an angular displacement are thus obtained simultaneously. For this reason, in order to ensure maximum safety, it is preferable to move the wheel back during a large longitudinal movement.
  • the 9/11 encoder transmits absolute or incremental electrical signals to the machine control allowing it to know at all times the angular position of the main shaft. By memorization, the control can also know the angular position of the correction shaft, allowing it to determine the angular and longitudinal positions of the diamond holder.
  • these positions can be determined more easily using an angular position detector 12, and at least one positioning reference 13: the detector 12 transmits a signal to the control means, corresponding to the angular position of the 'correction tree.
  • the control means can at any time determine the position of the correction shaft relative to the main shaft. The position of the probe on the cam is thus known, which makes it possible to directly obtain the longitudinal position of the diamond holder 32 and the diamond 33.
  • the clutch 20 is arranged above the clutch disc 4 and comprises at least one electromagnet 24, but preferably several, these being angularly distributed above of the disc 4.
  • the electromagnets are controlled by the control means so as to either raise or lower the disc 4, using an electromagnetic force of attraction, or repulsion, as the case may be.
  • said disc 4 is raised, so as to release the driven clutch surface. In addition, the holding force prevents any angular movement of the disc 4, so that the correction shaft does not rotate. This gives the situation where the angular displacement and the longitudinal displacement occur simultaneously.
  • said disc 4 is placed in the lowered position, bearing on the drive clutch surface 6, so that the correction shaft 1 rotates with the main shaft 2 and the disc 4. This gives the situation where only angular displacement occurs.
  • the electromagnets can also act against the force (rigidity) of the disc 4. In this case, the shafts are coupled when the electromagnets are not energized and vice versa.
  • FIG. 3 represents a second embodiment of the device according to the invention.
  • the elements of this embodiment which are of the same nature and play the same role as the corresponding elements of Figures 1 and 2, are designated by the same reference signs, with the addition of the prime symbol (′ ).
  • the main difference from the previous embodiment is in the drive of the shafts. Indeed, the drive means 3 ′, rather than being connected to the main shaft, is connected to the correction shaft 1 ′.
  • the drive means is of a known type, such as for example a belt (FIG. 3), a chain, a series of gears, etc., associated with an electric or hydraulic motor.
  • the lower part of the axis 2 ′ extends under the frame 10 ′ and ends with an adapter 2a ′, fixed to the lower end of the shaft.
  • the adapter 2a ′ makes it possible to connect the various mobile elements of the device to the shaft 2 ′. The latter can therefore cause all these elements to rotate with it. It then extends upwards over at least a portion of the length of the axis 1 ′ and advantageously ends at a level substantially equal to the upper part of the electromagnet 24 ′.
  • the clutch disc 4 ′ is arranged and centered on the upper end of the main axis 2 ′.
  • a flexible type disc is preferably used, as described above. However, according to an alternative embodiment (not shown), it is possible to use a non-flexible 4 ′ disc. In this case, it is necessary to use a spring fixing of known type, allowing the disc 4 ′ to perform a slight axial movement, so as to allow the action of clutching and disengaging the shafts.
  • An adapter 1a ′ is fixed on the correction shaft.
  • This adapter actually forms an enlarged portion of the shaft 1 ′, of diameter substantially equal to that of the disc 4 ′. It is under this adapter that the driving clutch surface 6 ′ is located. This surface is conformed to the lower peripheral surface of the adapter, so as to be concomitant with the clutch surface driven 5 ′.
  • the fact that the correction shaft is the driving shaft means that the driving clutch surfaces 6 ′ and driving 5 ′ are reversed with respect to surfaces 5 and 6 of the embodiment where the main shaft is the drive shaft.
  • the 9 ′ / 11 ′ encoder used is preferably placed at the end of the correction shaft, as shown in FIG. 3. It transmits to the control means a signal allowing the latter to know at all times the angular position of the correction shaft. Given the independence of the angular and longitudinal movements, information is obtained in this case allowing the control means to directly determine the longitudinal and angular position of the diamond holder and the diamond.
  • the location of the clutch 20 ′ also differs. Although it is possible in this case to use different types of clutch, such as hydraulic or pneumatic, a clutch of electromagnetic type is preferably used, comprising one or more electromagnets 24 ′. These electromagnets are preferably arranged under the clutch disc 4 ′, and act so as either to raise or lower the disc 4 ′, using an electro-magnetic force of attraction, or repulsion, as the case may be.
  • this second embodiment of the device it is possible to execute independently, either only an angular displacement, or only a longitudinal displacement.
  • By judiciously linking these two types of movement it is possible to carry out dressing operations by following a multitude of shapes, including straight edges, with constant or variable radius or combinations of these shapes.
  • the two axes are coupled.
  • the correction axis 1 ′ is driven by the drive means and rotates at a given speed, carrying with it the main axis 2 ′.
  • the two axes thus have an identical angular speed and there is therefore no relative movement between the two.
  • the diamond holder 32 ′ therefore follows the main shaft in its angular movement.
  • the two axes are independent.
  • the correction axis 1 ′ is driven by the drive means and rotates at a given speed, while the main shaft 2 ′ is held in a fixed position by the retention force of the electromagnet 24 ′.
  • the correction cam 34 ′ which rotates relative to the probe 31 ′, acts on the latter by pushing it laterally along its contour.
  • the transmission of the movement by the cam is well shown in FIG. 1A.
  • the probe linked to the diamond holder, guides the longitudinal movement of the latter. Since the main axis is fixed, only a longitudinal displacement is thus obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Manipulator (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP92811021A 1992-12-23 1992-12-23 Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal Expired - Lifetime EP0596179B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP92811021A EP0596179B1 (fr) 1992-12-23 1992-12-23 Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal
DE69200165T DE69200165T2 (de) 1992-12-23 1992-12-23 Von einem Einzelmotor angetriebene Vorrichtung für einen Diamanthalter mit Winkel- und Longitudinalbewegung.
ES92811021T ES2056701T3 (es) 1992-12-23 1992-12-23 Dispositivo monomotor de arrastre para portadiamante con movimiento angular y longitudinal.
US08/166,825 US5497759A (en) 1992-12-23 1993-12-15 Driving apparatus for a diamond toolholder
JP5344694A JP2684329B2 (ja) 1992-12-23 1993-12-21 角度方向及び縦方向に運動するダイヤモンドツールホルダー用の単一モーター駆動装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92811021A EP0596179B1 (fr) 1992-12-23 1992-12-23 Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal

Publications (2)

Publication Number Publication Date
EP0596179A1 EP0596179A1 (fr) 1994-05-11
EP0596179B1 true EP0596179B1 (fr) 1994-06-01

Family

ID=8212055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92811021A Expired - Lifetime EP0596179B1 (fr) 1992-12-23 1992-12-23 Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal

Country Status (5)

Country Link
US (1) US5497759A (es)
EP (1) EP0596179B1 (es)
JP (1) JP2684329B2 (es)
DE (1) DE69200165T2 (es)
ES (1) ES2056701T3 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020023199A (ko) * 2001-12-28 2002-03-28 김재수 연마휠 드레싱장치
JP5586409B2 (ja) * 2010-10-08 2014-09-10 Ｎｔｎ株式会社 ドレッシング装置
CN102950518B (zh) * 2012-11-02 2015-07-15 佛山市业鹏机械厂 钻石磨边磨锥一体机传动链的自动离合机构
CN114346909A (zh) * 2022-01-19 2022-04-15 东莞针刺科技有限公司 一种全自动精密自动跟踪砂轮修整装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1905390A (en) * 1930-04-30 1933-04-25 Lindner Herbert Device for shaping and truing grinding rolls
US2317411A (en) * 1941-11-08 1943-04-27 Ex Cell O Corp Dressing mechanism
US3269381A (en) * 1963-05-03 1966-08-30 Universal American Corp Dressing assembly for grinding machine
DE1905144C3 (de) * 1969-02-03 1973-12-06 Lohf & Tillipaul, 2000 Hamburg Abrichtvorrichtung für Schleif scheiben zum Abrichten von konkaven und konvexen Profilen mit geradliniger Anschlußbewegung
US4805585A (en) * 1987-08-19 1989-02-21 Bryant Grinder Corporation Radius dressing apparatus
US5003730A (en) * 1987-08-19 1991-04-02 Bryant Grinder Corporation Radius dressing apparatus
US5138799A (en) * 1991-04-12 1992-08-18 Bryant Grinder Corporation Probe positioning mechanism for a radius dresser
EP0512956B1 (fr) * 1991-05-07 1994-09-07 Voumard Machines Co. S.A. Rectifieuse à commande numérique

Also Published As

Publication number Publication date
DE69200165D1 (de) 1994-11-17
US5497759A (en) 1996-03-12
EP0596179A1 (fr) 1994-05-11
ES2056701T3 (es) 1994-10-01
JP2684329B2 (ja) 1997-12-03
DE69200165T2 (de) 1995-02-16
JPH06206162A (ja) 1994-07-26

Similar Documents

Publication Publication Date Title
EP0669188B1 (fr) Dispositif de centrage et de blocage d'une pièce en vue de son rodage à l'aide d'un rodoir à expansion
EP0362019B1 (fr) Dispositif de coupe et de poinçonnage pour matières en feuilles
FR2607050A1 (fr) Outil a moteur a deux vitesses dont le passage d'une vitesse a l'autre est effectue automatiquement par un dispositif a came, tel que perceuses ou analogues
FR2526342A1 (fr) Tour automatique revolver multibroche
EP0853527A1 (fr) Dispositif de mesure ou de controle de l'usinage d'une piece cylindrique a mouvement orbital
EP0588713B1 (fr) Machine à fraiser, à surfacer et à polir, à changement automatique d'outils et dispositif correspondant
FR2771319A1 (fr) Dispositif de serrage d'un organe tubulaire notamment au moyen de mors mobiles
EP0596179B1 (fr) Dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal
EP0820837A1 (fr) Machine de meulage de verres optiques
FR2460753A1 (fr) Machine de rectification de cames
EP0214090A1 (fr) Dispositif d'entraînement de porte-outils dans une machine d'usinage
EP0869858B1 (fr) Unite d'usinage a tete rotative
EP0196941B1 (fr) Dispositif de surfaçage et de polissage du chant vertical d'une pierre ou d'un élément préfabriqué massif
FR2569596A1 (fr) Dispositif de bridage et accouplement le comportant
EP0334226B1 (fr) Dispositif de fixation d'outils sur un appareil circulaire
FR2486841A1 (fr) Tourelle porte-outils a corps revolver
FR2654968A1 (fr) Machine de rodage par expansion d'alesages.
EP0170604A1 (fr) Dispositif pour la fixation d'un outil, par exemple une meule, à la broche d'une machine outil et machine outil équipée d'un tel dispositif
FR2545419A1 (fr) Machine de rainurage et de coupe pour bandes de carton ou materiaux similaires
EP1125661B1 (fr) Dispositif de perçage radial pour tour
WO2000029766A1 (fr) Agencement pour l'entrainement d'un axe de commande d'une boite de vitesses
EP0920957A1 (fr) Tête tangentielle pour le polissage et le lustrage du granit et du grès emaillè
FR2469234A1 (fr) Broche porte-outil
FR2649031A1 (fr) Dispositif de serrage rapide d'une piece de revolution
FR2850050A1 (fr) Procede de meulage d'une lentille ophtalmique et machine de meulage associee

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

17P Request for examination filed

Effective date: 19921228

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940808

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2056701

Country of ref document: ES

Kind code of ref document: T3

REF Corresponds to:

Ref document number: 69200165

Country of ref document: DE

Date of ref document: 19941117

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTS & TECHNOLOGY SURVEYS, FORNEROD & SAAM

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20011116

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20011120

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011208

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20011211

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20011212

Year of fee payment: 10

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20021223

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20021224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051223