EP0603074A1 - Verfahren zur Kontrolle der Anpassung einer zu schleifenden Linse an ein Brillengestell auf einer Schleifmaschine - Google Patents

Verfahren zur Kontrolle der Anpassung einer zu schleifenden Linse an ein Brillengestell auf einer Schleifmaschine Download PDF

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Publication number
EP0603074A1
EP0603074A1 EP93403051A EP93403051A EP0603074A1 EP 0603074 A1 EP0603074 A1 EP 0603074A1 EP 93403051 A EP93403051 A EP 93403051A EP 93403051 A EP93403051 A EP 93403051A EP 0603074 A1 EP0603074 A1 EP 0603074A1
Authority
EP
European Patent Office
Prior art keywords
template
glass
lens
axis
grinding wheel
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.)
Granted
Application number
EP93403051A
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English (en)
French (fr)
Other versions
EP0603074B1 (de
Inventor
Christian Joncour
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
Application filed by Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Publication of EP0603074A1 publication Critical patent/EP0603074A1/de
Application granted granted Critical
Publication of EP0603074B1 publication Critical patent/EP0603074B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B9/148—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 electrically, e.g. numerically, controlled
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B24B47/225—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation for bevelling optical work, e.g. lenses

Definitions

  • the present invention relates generally to the control of the adequacy of the outline of the circles or of the surroundings of a spectacle frame of the glasses intended to equip it.
  • spectacle lenses are initially presented in the form of pucks of circular, elliptical or other contour, and of different sizes, which should be overflowed by grinding to adjust them to the contour of the circles or surrounds of the spectacle frames to be fitted.
  • a grinder generally comprising at least one grinding wheel, which is rotatably mounted on a frame, a rocker, which is pivotally mounted on this frame around an axis parallel to the axis of rotation. of the grinding wheel, a support spindle, which is rotatably mounted on the rocker around an axis parallel to the axis of rotation of the grinding wheel, and which is adapted to receive axially, on the one hand, the glass to be ground, and, on the other hand, a jig, and, positioned directly above the jig, a contact detector, which, in practice, is mounted movably on the frame transversely to the pivot axis of the rocker.
  • the template is a shaped template, that is to say a template whose outline corresponds exactly to that of the circles or surroundings of spectacle frame to be fitted, and, when it comes into contact with the contact detector , thus forming a stop, which is associated with it, it interrupts the movement of engagement of the glass with respect to the grinding wheel due to the gravity of the rocker alone or to the combined effect of this gravity and of means such as springs or counterweight and thus limits to the desired contour the overflowing of this glass at the corresponding place.
  • the template is a round template
  • the contact detector which is associated with it is then subjected to control means which, in conjunction with the outline of the circles or surrounds of spectacle frame to be fitted, control a movement thereof causing a pivoting in one direction or the other of the rocker so as to adjust accordingly to places where the glass overflows.
  • a glass of sufficient size that is to say a glass whose contour envelopes with certainty that of the circle or entourage to be fitted with regard to the centering according to which this glass must be mounted in this circle or circle.
  • the subject of the present invention is a method making it possible to economically take advantage of the only grinder for this adequacy check, without the need to use any additional devices or without the need to carry out any calculation.
  • This process is generally characterized in that the glass to be ground is mounted on the support spindle of the grinder, this glass is brought into contact with the wheel of this grinder in the absence of any rotation of this wheel, the support spindle is rotated step by step until the glass to be ground turns on itself a full turn, and it is checked whether, during this turn, the contact detector associated with the template also fitted to the grinder is operated by it.
  • the size of the glass is not suitable.
  • the method according to the invention makes it very possible quickly, without excessive handling, or intervention of any other device, to ensure, using the only grinder, taking advantage of the only components thereof, the adequacy check to be performed.
  • FIG. 1 it is generally a question of ensuring the overflowing of a spectacle lens 10 on a grinder 11 to allow mounting thereof in one of the circles or surrounds of a determined spectacle frame not shown.
  • the grinder 11 usually comprises at least one grinding wheel 12 which, under the control of a motor 13, is rotatably mounted on a frame not shown, along an axis of rotation A1 shown diagrammatically in broken lines on Figure 1, a rocker 14, which, according to the double arrow F1 of Figure 1, is pivotally mounted on the frame, around an axis A2 shown schematically in broken lines in Figure 1 and parallel to the axis of rotation A1 of the grinding wheel 12, a support spindle 15, which is rotatably mounted on the rocker 14 around an axis A3 also shown schematically in broken lines in Figure 1 and also parallel to the axis of rotation A1 of the grinding wheel 12 , and which is adapted to receive axially, on the one hand, the glass 10 to be ground, being for example, and as shown, formed by two half-spindles 15 ', 15' 'suitable for enclosing between them the glass 10 duly glued beforehand, and, on the other hand, and according to the provisions described more
  • This grinder 11 is for example of the type described in the French patent which, filed on March 22, 1983 under No 83 04637, was published under No 2 543 039.
  • This grinder 11 is thus well known in itself, it will not be described in more detail here.
  • the template 16 is disposed at the end of the support pin 15, and that the contact detector 17 which is associated with it is itself disposed at the end of a rod.
  • this motor 21 is under the control of a control unit, not shown.
  • the contact detector 17 comprises, on the one hand, a key 22, on which the template 16 is capable of bearing by its edge and whose upper surface is a coaxial cylindrical surface of the grinding wheel 12 and of the same diameter as the latter so as to have a convex profile so as to allow it to cooperate as well as possible with the template 16, and, on the other hand, a plate 23 , which is carried by the support rod 18 and on which the key 22 is pivotally mounted around an axis A4 parallel to the pivot axis A2 of the rocker 14, with, acting between this key 22 and this plate 23, a displacement detector 24 and a spring 25.
  • the assembly constitutes what, for a grinder 11 of the kind concerned, is usually called a vernier head.
  • the displacement detector 24 is constituted by an optoelectronic cell, which is carried by the plate 23, and between the transmitter 26 and the receiver 27 from which is likely to be inserted, when the key 22 is pressed in, a cut-off pallet 28 carried by the latter.
  • the template 16 has an outline which, point by point, is strictly identical to that of the circle or surrounding of the spectacle frame to be fitted.
  • the contact detector 17 is in this case stationary, to then form a stop for the template 16, being for do this duly locked in position by the motor 21.
  • the template 16 is a round template, and it is the contact detector 17 taken as a whole which, controlled accordingly by the motor 21 under the control of the unit associated piloting, then limit point by point the movement of engagement of the glass 10 relative to the grinding wheel 12.
  • control unit restores for this the shape data which are transmitted to it by a contour reading device to which the circle or entourage of spectacle frame to be fitted is corollary, and, at each of its swings in a direction or in the other, the key 22 of the contact detector 17 intervenes consequently on the direction of rotation of the motor 21 by means of the displacement detector 24 which is underlying it.
  • the practitioner should check that the glass 10 to be ground, duly centered with respect to the axis of rotation A3 of the support pin 15 by the gripping block which has been applied to it accordingly, and therefore duly centered with respect to the template 16, is of adequate size.
  • the template 16 is a shaped template.
  • this glass 10 After having mounted the glass 10 to be ground on the support spindle 15, this glass 10 is brought into contact with the grinding wheel 12 in the absence of any rotation thereof, and, as shown diagrammatically in FIG. 2 by lines P1, P2, P3 etc ... linked to the corresponding positions of the template 16, the support pin 15 is rotated step by step until the glass 10 grinding makes a complete turn on itself.
  • the template 16 remains permanently at a distance from the contact detector 17 during this turn.
  • the maximum circle C which it scans during it does not overlap with the key 22 that this contact detector 17 includes, which, as a result, is spared from any contact with the template 16, and therefore remains motionless, without ever being depressed.
  • the contact detector 17 is or is not actuated by the template 16.
  • the size of the glass 10 is sufficient.
  • the control of a possible actuation of the contact detector 17 is ensured by the displacement detector 24 which it comprises.
  • the glass 10 ensures a lifting of the rocker 14 between each pitch of the support pin 15, so that the joint rotation of the glass 10 is not made in contact with the grinding wheel 12.
  • the procedure is the same as above.
  • the various operations of the method according to the invention can advantageously be integrated into a special working cycle of the grinder 11, or auscultation cycle, to be carried out prior to any grinding cycle thereof.
  • the present invention is moreover not limited to the mode of implementation described but encompasses any variant of execution.
  • grinder we mean here any “overflow machine”, whether it is really a grinder or whether it is a beveler, and by “grinding wheel”, it must be understood any cutting or machining tool, whether it is really a grinding wheel or whether it is for example a milling cutter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)
EP93403051A 1992-12-18 1993-12-16 Verfahren zur Kontrolle der Anpassung einer zu schleifenden Linse an ein Brillengestell auf einer Schleifmaschine Expired - Lifetime EP0603074B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9215299A FR2699445B1 (fr) 1992-12-18 1992-12-18 Procédé pour le contrôle sur une meuleuse de l'adéquation, à une monture de lunettes, d'un verre à meuler.
FR9215299 1992-12-18

Publications (2)

Publication Number Publication Date
EP0603074A1 true EP0603074A1 (de) 1994-06-22
EP0603074B1 EP0603074B1 (de) 1996-09-04

Family

ID=9436774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93403051A Expired - Lifetime EP0603074B1 (de) 1992-12-18 1993-12-16 Verfahren zur Kontrolle der Anpassung einer zu schleifenden Linse an ein Brillengestell auf einer Schleifmaschine

Country Status (6)

Country Link
US (1) US5398460A (de)
EP (1) EP0603074B1 (de)
JP (1) JP3499908B2 (de)
DE (1) DE69304501T2 (de)
ES (1) ES2091580T3 (de)
FR (1) FR2699445B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700286B1 (fr) * 1993-01-08 1995-03-24 Essilor Int Machine à meuler des lentilles ophtalmiques.
FR2706800B1 (de) * 1993-06-25 1995-11-03 Essilor Int
FR2711331B1 (fr) * 1993-10-19 1996-01-26 Essilor Int Machine à déborder pour verre de lunettes.
FR2720021B1 (fr) * 1994-05-19 1996-08-02 Buchmann Optical Eng Machine à meuler des verres ophtalmiques comportant des moyens d'asservissement de la valeur de serrage de l'ébauche du verre à meuler.
JPH08168946A (ja) * 1994-12-13 1996-07-02 Shin Etsu Handotai Co Ltd ウェーハ外周部の研磨装置
US5609512A (en) * 1995-01-09 1997-03-11 Kraft Foods, Inc. Method and apparatus for off-line honing of slicer blades
JPH09277148A (ja) * 1996-04-17 1997-10-28 Topcon Corp レンズ周縁研削方法及びその装置
US5683288A (en) * 1996-11-18 1997-11-04 Elision Technology Inc. Patternless edger apparatus for ophthalmic lens grinders
FR2784920B1 (fr) * 1998-10-22 2001-01-19 Essilor Int Procede pour la determination de la trajectoire de la rainure a usiner sur la tranche d'un verre destine a equiper une monture de lunettes de type "semi-glace"
DE10254238B4 (de) * 2002-11-20 2007-04-19 Bärenz, Manfred Brillenglas-Randschleifmaschine
CN109304647B (zh) * 2018-11-16 2021-01-26 马鞍山钢铁股份有限公司 一种评价托瓦面吻合度的装置及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543039A1 (fr) * 1983-03-22 1984-09-28 Essilor Int Procede pour le biseautage d'une lentille ophtalmique, et machine a meuler automatique correspondante
EP0235021A2 (de) * 1986-02-10 1987-09-02 Kabushiki Kaisha TOPCON Linsenschleifvorrichtung
EP0274276A2 (de) * 1987-01-05 1988-07-13 Brain Power International Ltd Maschine und Verfahren zur Randbearbeitung von Linsen
EP0379427A2 (de) * 1989-01-18 1990-07-25 Kabushiki Kaisha TOPCON Rohling-Messapparat für Linsenschleifmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524419A (en) * 1982-09-13 1985-06-18 Intelab Medical Systems, Inc. System for determining the optimal ground depth of an ophthalmic lens having a closed homeomorphic boundary
FR2611560B1 (fr) * 1987-03-05 1992-10-02 Briot Int Perfectionnements aux machines a meuler et a biseauter les verres ophtalmiques
FR2644718A1 (fr) * 1989-03-23 1990-09-28 Briot Internal Dispositif de reetalonnage d'une machine a meuler les verres ophtalmiques pour rattraper l'usure de la meule
US5155940A (en) * 1989-10-30 1992-10-20 Kabushiki Kaisha Topcon Apparatus for judging whether an uncut lens should be machined or not and lens grinding machine having the same
US5333412A (en) * 1990-08-09 1994-08-02 Nidek Co., Ltd. Apparatus for and method of obtaining processing information for fitting lenses in eyeglasses frame and eyeglasses grinding machine
FR2682628B1 (fr) * 1991-10-21 1996-01-05 Buchmann Optical Eng Perfectionnements aux machines a meuler et a biseauter les verres ophtalmiques.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543039A1 (fr) * 1983-03-22 1984-09-28 Essilor Int Procede pour le biseautage d'une lentille ophtalmique, et machine a meuler automatique correspondante
EP0235021A2 (de) * 1986-02-10 1987-09-02 Kabushiki Kaisha TOPCON Linsenschleifvorrichtung
EP0274276A2 (de) * 1987-01-05 1988-07-13 Brain Power International Ltd Maschine und Verfahren zur Randbearbeitung von Linsen
EP0379427A2 (de) * 1989-01-18 1990-07-25 Kabushiki Kaisha TOPCON Rohling-Messapparat für Linsenschleifmaschine

Also Published As

Publication number Publication date
FR2699445B1 (fr) 1995-03-03
US5398460A (en) 1995-03-21
JPH06206155A (ja) 1994-07-26
JP3499908B2 (ja) 2004-02-23
EP0603074B1 (de) 1996-09-04
FR2699445A1 (fr) 1994-06-24
DE69304501D1 (de) 1996-10-10
ES2091580T3 (es) 1996-11-01
DE69304501T2 (de) 1997-03-27

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