EP0176401B2 - Machine à meuler pour le biseautage ou rainurage guidé ou libre d'une lentille ophtalmique - Google Patents

Machine à meuler pour le biseautage ou rainurage guidé ou libre d'une lentille ophtalmique Download PDF

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Publication number
EP0176401B2
EP0176401B2 EP85401677A EP85401677A EP0176401B2 EP 0176401 B2 EP0176401 B2 EP 0176401B2 EP 85401677 A EP85401677 A EP 85401677A EP 85401677 A EP85401677 A EP 85401677A EP 0176401 B2 EP0176401 B2 EP 0176401B2
Authority
EP
European Patent Office
Prior art keywords
support spindle
grooving
movable support
ophthalmic lens
machine 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
EP85401677A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0176401A1 (fr
EP0176401B1 (fr
Inventor
Luc Delattre
Jean-Francois Moulin
Patrice Renan
Suzan Badin
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.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique 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
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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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms

Definitions

  • the present invention relates generally to the beveling, or grooving, of an ophthalmic lens.
  • this beveling is carried out on a machine commonly known as a grinding machine, comprising, at a machining station, on a frame, a first support spindle, which carries at least one grinding wheel beveling or grooving, and which is rotatably mounted under the control of a drive motor, and a second support pin, which arranged parallel to the first, and rotatably mounted like this, is suitable for axially enclosing a lens ophthalmic to the right of said beveling wheel or grooving, for contact, by its edge, of said ophthalmic lens therewith.
  • a machine commonly known as a grinding machine, comprising, at a machining station, on a frame, a first support spindle, which carries at least one grinding wheel beveling or grooving, and which is rotatably mounted under the control of a drive motor, and a second support pin, which arranged parallel to the first, and rotatably mounted like this, is suitable for axially enclos
  • the relative axial displacement of the movable support spindle can, as a variant, be done freely, by using a bevel wheel with a double slope in the groove of which this lens penetrates by the whole of its edge and therefore automatically centers itself permanently.
  • the bevel to be formed can ⁇ go out ⁇ from the limits of this periphery in the thinnest zone of the lens concerned, or in other words, inadvertently failing in this thin area.
  • the object of the present invention is precisely such a grinding machine.
  • This grinding machine which is therefore intended for bevelling or grooving an ophthalmic lens, is of the type comprising, at a machining station, on a frame, as described for example in French patent application No. 83 16574 mentioned above, a first support spindle, which carries at least one beveling or grooving wheel, and which is rotatably mounted under the control of a drive motor, and a second support spindle, which, arranged parallel to the first, and rotatably mounted like this, is suitable for axially enclosing an ophthalmic lens in line with said beveling wheel or grooving, for contact, by its edge, of said ophthalmic lens with the latter, at least one said support pins, said for convenience movable support spindle, being also movably mounted on the frame parallel to its axis, in association with advancing means which, using a motor, are capable of ensuring a guided displacement thereof parallel to said axis, this grinding machine being characterized in that the advance means associated
  • this operation is carried out by means of a DC motor.
  • the grinding machine used for such beveling generally comprises, at the corresponding machining station, on a frame 13, a first support spindle 15, which carries at least one beveling wheel 16, and which is rotatably mounted under the control of a drive motor 17, and a second support pin 18, which, arranged parallel to the first, and rotatably mounted like this, is suitable for axially enclosing the ophthalmic lens 10, at right of the beveling wheel 16, for contact, by its edge, with the latter.
  • this second support pin 18 is formed, in practice, of two half-pins 18A, 18B, suitable for enclosing between them the ophthalmic lens 10 which they must carry, one of these half-pins 18A, 18B being for this purpose mounted axially movable relative to the other and axially lockable in position relative to the latter.
  • the beveling wheel 16 For the beveling of the ophthalmic lens 10, the beveling wheel 16 comprises, in its median zone, a groove with a V cross section 34.
  • At least one of the support pins 15, 18, referred to here simply as a movable support pin is movably mounted on the frame 13, parallel to its axis, in association with advance means adapted to ensure a guided movement parallel to said axis.
  • this support pin 15, and, with it, the beveling wheel 16 and its drive motor 17, are carried by a member 36, said here for simple convenience, support member, mounted movably on the frame 13 , parallel to the axis of the support pin 15, along the double arrow F2 in FIGS. 1, 2.
  • this support member 36 or carriage, is, for this purpose, engaged with two guides 38 carried, parallel to themselves, by the frame 13.
  • a sole 56 which extends in overhang parallel to the frame 13, at a distance from the latter.
  • the advance means associated with the movable support spindle 15 comprise a member 40, said here for simple convenience, drive member, in practice a simple threaded nut, and a threaded rod 41 which, rotatably mounted on the frame 13, is locked in rotation on the output shaft of a stepping motor 44.
  • disengageable connection means 57 are established, suitable for allowing, on request, either an effective axial displacement control of said movable support pin 15 by said advancing means, that is to say its release at least relative with respect thereto.
  • these disengageable connection means 57 comprise, on the one hand, two flanges 58, which, established, at a distance from each other, transversely with respect to the axis of the movable support pin 15, are integral with any one of the members 36, 40, specified above, and, on the other hand, between said flanges 58, stop means 59, which, carried by the other of said members 36, 40, are mounted movable thereon between a retracted position, release, for which they are spaced from the flanges 58, and a deployed position, connection, for which they are arcboutés therebetween.
  • the flanges 58 are integral with the drive member 40, while the associated stop means 59 are carried by the support member 36, and, more precisely, by the sole 56 that includes this one, this sole extending to this effect beyond the threaded rod 41 of the associated advancing means, between this threaded rod 41 and the frame 13.
  • the stop means 59 comprise two strips 60, which, mounted movable in opposite directions relative to each other, parallel to the axis of the movable support pin 15, are each respectively adapted, in the deployed position, FIG. 6, to come into abutment, by one of their transverse ends, against the flanges 58.
  • these two strips 60 are thus mounted movable synchronously on the support member 36 which carries them, and they are for this purpose each respectively secured to two racks 62, which, each arranged respectively on either side of the same control pinion 63 rotatably mounted on said support member 36, mesh with each other with the latter.
  • This control pinion 63 is wedged on the output shaft 64 of a geared motor 65, which is also carried by the support member 36, and whose motor 66 is preferably a DC motor.
  • This motor 66 is available to the user.
  • the racks 62 are attached to the strips 60 by screws 68, FIG. 5, and these strips 60 are each respectively slidably mounted in two guides 69 belonging to the support member 36 which carries them, and more precisely, to a part 70, in the form of a yoke, attached itself, by a sole 71, and by means of screws 74, on the sole 56 which comprises said support member 36.
  • each strip 60 that of the flanges 58 opposite that with which it cooperates in support in the deployed position has, to its right, that is to say in its extension, a clean passage 75 to his engagement.
  • one of the strips 60 in practice that furthest from the frame 13, carries, projecting upwards, a pin 77, intended to cooperate, in abutment, with the bottom of a groove 78 formed for this purpose in the corresponding wing 73 of the yoke-shaped part 70 in which these slide bars 60 are slidably mounted.
  • the strips 60 come to bear against their respective flanges 58, moving, jointly, synchronously, but in opposite directions with respect to each other, following the arrows F4 in FIG. 6.
  • the stop means 59 which they form jointly are braced between the flanges 58, and it follows that the support member 36 which carries them is linked in movement to these flanges 58.
  • the motor 44 which controls the relative axial displacement of the movable support pin 15 relative to the support pin 18, according to a so-called guided beveling mode of the ophthalmic lens 10 during treatment. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP85401677A 1984-09-11 1985-08-23 Machine à meuler pour le biseautage ou rainurage guidé ou libre d'une lentille ophtalmique Expired - Lifetime EP0176401B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8413906A FR2570013B1 (fr) 1984-09-11 1984-09-11 Machine a meuler pour le biseautage ou rainurage guide ou libre d'une lentille ophtalmique
FR8413906 1984-09-11

Publications (3)

Publication Number Publication Date
EP0176401A1 EP0176401A1 (fr) 1986-04-02
EP0176401B1 EP0176401B1 (fr) 1988-05-04
EP0176401B2 true EP0176401B2 (fr) 1996-01-17

Family

ID=9307606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401677A Expired - Lifetime EP0176401B2 (fr) 1984-09-11 1985-08-23 Machine à meuler pour le biseautage ou rainurage guidé ou libre d'une lentille ophtalmique

Country Status (5)

Country Link
US (1) US4640055A (enrdf_load_html_response)
EP (1) EP0176401B2 (enrdf_load_html_response)
JP (1) JPS6186167A (enrdf_load_html_response)
DE (1) DE3562464D1 (enrdf_load_html_response)
FR (1) FR2570013B1 (enrdf_load_html_response)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582975B1 (fr) * 1985-06-10 1987-08-28 Briot Int Appareil pour centrer et poser un adaptateur sur une ebauche de verre optique et pour commander une rectifieuse
DE3608957C2 (de) * 1986-03-18 1994-02-10 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
US4909679A (en) * 1986-10-08 1990-03-20 National Optronics Inc. Plastic lens edge beveler
FR2632555B1 (fr) * 1988-06-14 1990-09-28 Briot Int Perfectionnements aux machines a meuler
US5158422A (en) * 1991-03-01 1992-10-27 National Optronics, Inc. Method and apparatus for shaping and finishing lenses
FR2843903A1 (fr) * 2002-08-30 2004-03-05 Briot Int Appareil de meulage de lentilles ophtalmiques

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814917A (en) * 1956-01-13 1957-12-03 Landis Tool Co Locator
US3332172A (en) * 1964-11-16 1967-07-25 A I T Machine Co Inc Automatic edger
DE2103703C3 (de) * 1971-01-27 1974-02-21 Wernicke & Co Kg, 4000 Duesseldorf Maschine zum Beschleifen eines Brillenglasrandes
JPS537893A (en) * 1976-07-12 1978-01-24 Fuji Electric Co Ltd Apparatus for switching automatically and manually
US4176498A (en) * 1978-02-21 1979-12-04 Ait Industries, Inc. Apparatus for edging lenses
US4191501A (en) * 1978-07-21 1980-03-04 National Optronics, Incorporated Plastic lens cutter and edger
DE3221713A1 (de) * 1982-06-09 1983-12-15 Wernicke & Co GmbH, 4000 Düsseldorf Brillenglasrandschleifmaschine
FR2553323B1 (fr) 1983-10-18 1986-07-25 Essilor Int Procede et machine pour le biseautage ou rainurage d'une lentille ophtalmique

Also Published As

Publication number Publication date
DE3562464D1 (en) 1988-06-09
JPS6186167A (ja) 1986-05-01
FR2570013B1 (fr) 1987-02-13
JPH0445295B2 (enrdf_load_html_response) 1992-07-24
EP0176401A1 (fr) 1986-04-02
US4640055A (en) 1987-02-03
FR2570013A1 (fr) 1986-03-14
EP0176401B1 (fr) 1988-05-04

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