EP0740979B1 - Aufnahmewerkzeug zum Bearbeiten von optischen Linsen und Verfahren zu dessen Handhabung - Google Patents

Aufnahmewerkzeug zum Bearbeiten von optischen Linsen und Verfahren zu dessen Handhabung Download PDF

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Publication number
EP0740979B1
EP0740979B1 EP96400919A EP96400919A EP0740979B1 EP 0740979 B1 EP0740979 B1 EP 0740979B1 EP 96400919 A EP96400919 A EP 96400919A EP 96400919 A EP96400919 A EP 96400919A EP 0740979 B1 EP0740979 B1 EP 0740979B1
Authority
EP
European Patent Office
Prior art keywords
base
superstructure
disc according
disc
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.)
Expired - Lifetime
Application number
EP96400919A
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English (en)
French (fr)
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EP0740979A1 (de
Inventor
Jacques Moreau
Jean Perrin
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 EP0740979A1 publication Critical patent/EP0740979A1/de
Application granted granted Critical
Publication of EP0740979B1 publication Critical patent/EP0740979B1/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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices

Definitions

  • the present invention relates generally the slipping of an optical lens, i.e. the establishment thereon of a gripping block specific to allow it to be set in rotation on a drive tool during its machining.
  • a gripping block For machining any of the faces of such ophthalmic lens in its final configuration, which it whether it's roughing or whether it's smoothing or its polishing, it is necessary to establish, on the other of the faces of this ophthalmic lens, a gripping block, so that, by the drive tool of a suitable machine for this purpose, it can be maintained in application against the corresponding surfacing tool.
  • this gripping block was reported by pitch on the ophthalmic lens.
  • pre-wheel a simple mattress junction interposed between the ophthalmic lens and a prefabricated part, which, by reference to the wooden knob on which used to be an ophthalmic lens for work, is usually called pre-wheel.
  • the pre-wheel implemented comprises, overall, on the one hand, a base, by which it is intended to be locked in rotation on the ophthalmic lens to be machined, by the intermediary, therefore, of a low-profile metal connecting mattress melting point melted in situ, and, on the other hand, a superstructure, by which it is capable of being capped by a training tool.
  • This pre-wheel can advantageously be used again successively for many ophthalmic lenses.
  • This wear is in practice incompatible with machining precision constraints to be respected for treated ophthalmic lenses.
  • the pre-wheel is hollow, and, the arrival of the molten metal being done by the recess which it presents axially, only intervenes in practical for the rotational setting of the junction mat obtained a limited number of lugs formed from holes blinds provided for this purpose on the lower surface of the base.
  • the rotational setting of the junction mat, and therefore ophthalmic lens, on the pre-dial is there relatively uncertain, at the risk of inaccuracy in the maintenance of the ophthalmic lens during its machining, and, so, again, at the expense of the accuracy of the surface machined.
  • the present invention generally has for subject a provision to avoid these drawbacks.
  • a pre-wheel for gliding an optical lens of the kind comprising, on the one hand, a base, by which it is intended to be locked in rotation on the optical lens to be machined, using a metal connection mat with low melting point melted in situ, and, on the other hand, a superstructure, by which it is capable of being capped by a training tool, this pre-wheel being in a way general characterized in that its base is peripherally set back vis-à-vis its superstructure.
  • junction mattress it is advantageously possible to allow the junction mattress to form around from the base of the pre-wheel a range specific to the grip of the training tool.
  • the present invention still has for object a method of implementing a gripping block with this pre-wheel, which is the kind that we establish between this pre-wheel and the optical lens to be fitted, for its setting in rotation on it, a metal connecting mat at low melting point melted in situ, and that is in a way general characterized in that it is made so that this connecting mat peripherally encloses the base of the pre-wheel by annularly forming around this base a scope specific to the grip of the drive tool.
  • this grip is transferred from the pre-dial to the junction mat.
  • the pre-wheel is advantageously provided, and, less subject to wear, it can serve a greater number of times without the surfacing conditions of successively processed optical lenses are found there compromised.
  • the mattress junction wraps the base of the pre-wheel is advantageously favorable to a good anchoring of this mattress junction on this pre-wheel, and, therefore, by the setting in resulting rotation, good support of the lens optics during its surfacing, again for the benefit of the precision of the machined surface.
  • this anchoring can advantageously be done on the lateral surface of the base, which, on the one hand, is, generally speaking, more extensive than its lower surface, and which, on the other hand, is at any point at a greater distance of the axis of the whole, for the benefit of efficiency in torque corresponding anchor points.
  • the base of the pre-wheel according to the invention has, recessed, on its surface lateral, at least one notch, and, preferably, several notches distributed circularly.
  • the mattress junction surrounds the base of the pre-wheel combines advantageously with a peripheral arrival of the molten metal, which advantageously spares the central zone of the lens optics treated, reducing the risk of development untimely constraint in it.
  • the drive tool 12 is bell-shaped, so to be able to cap the gripping block 11.
  • the block of gripping 11 implements a pre-wheel 15, which, according to provisions described in more detail later, comprises, on the one hand, a base 16, by which it is intended to be locked in rotation on the lens optics 10 to be machined, via a mattress junction 17 made of metal with a low melting point melted in situ, and, on the other hand, a superstructure 18, by which it is able to be capped by the drive tool 12.
  • the pre-wheel 15 is a part of revolution, of axis A diagrammed in broken lines in the figures.
  • the lateral surface 20 of the superstructure 18 of the pre-wheel 15 is generally frustoconical, going by converging in direction of its upper surface 21.
  • this upper surface 21 is planar, extending substantially perpendicular to the axis A, and the superstructure 18 has, recessed on this surface upper 21, on the one hand, axially, a clearance 23, which is entirely circumscribed annularly by its periphery, and, on the other hand, for cooperation with the training tool 12, a diametrical groove 24, which, intersecting the clearance 23, is split into two sections by it.
  • the base 16 of the pre-wheel 15 is peripherally set back from its superstructure 18, so as to allow the junction mat 17 to form around it, as shown in solid lines on the Figure 1 and as shown in broken lines on the Figure 3, a range 25 specific to the grip of the tool 12.
  • this scope 25 is a scope cylindrical circular cross section centered on axis A.
  • the lateral surface 26 of the base 16 forms with the lateral surface 20 of the superstructure 18 an edge 27, and it is from this edge 27 that extends the span 25.
  • the surface lateral 26 of the base 16 comprises, from the edge 27, a first section 26A, which is generally frustoconical, and which goes by converging towards its lower surface 28, and a second section 26B, which is also generally tapered, but which, unlike the first, goes diverging towards the lower surface 28.
  • the lateral surface 26 of the base 16 has a third section 26C, which is generally cylindrical, extending peripherally along a circumference of diameter less than that of the circumference which extends the edge 27, and which, axially, extends to the surface lower 28.
  • this base 16 is generally set back from the edge 27 which it forms with the superstructure 18, and, therefore, with respect to this last.
  • the base 16 of this pre-wheel 15 has, recessed, on its lateral surface 26, at least one notch 29.
  • notches 29 are provided, being suitably distributed circularly.
  • these notches 29, all identical to each other, are four, and they are generally arranged in a cross around axis A of the assembly.
  • each of the notches 29 does not arises only at a distance from the edge 27 that the base 16 forms with the superstructure 18 and on the contrary extends up to the lower surface 28 of this base 16, biting in growing on this lower surface 28.
  • each of the notches 29 is formed by the conjunction of two surfaces, namely, on the one hand, a flat surface 30, which extends substantially perpendicular to axis A, at a distance of the lower surface 28, and, on the other hand, a surface curve 31, which, starting from the contour of the planar surface 30, generally extends at an angle to axis A and joins the lower surface 28.
  • the lower surface 28 of the base 16 is flat, extending perpendicularly to axis A.
  • clearance 23 of the superstructure 18 is one-eyed.
  • this clearance 23 is closed at its base by a full bottom 32.
  • the following pre-wheel 15 the invention includes an angular orientation mark 33.
  • this mark of angular orientation 33 is formed by a groove, which, affecting, in hollow, the upper surface 21 of the superstructure 18, is separated, angularly, from the groove diametral 24 that it presents.
  • this benchmark of angular orientation 33 can also be formed by a single groove locally affecting the lower surface 28 from base 16.
  • a gripping block comprising the pre-wheel 15 next the invention, it is, for example, as follows.
  • this pre-wheel 15 is engaged by its superstructure 18 in a recess 35 provided for this purpose in the hollow on the surface of a wedging form 36 slightly inclined.
  • this ring 37 can be part integral with the form of wedging 36.
  • the optical lens 10 to be fitted is then reported on the whole, along axis A of the pre-wheel 15.
  • the Junction mattress 17 obtained comprises, in addition to the span 25, a shoulder 40, which extends perpendicular to the axis A of the whole, and, beyond this shoulder 40, a development 41 whose lateral surface 42 is generally frustoconical, in going diverging from shoulder 40.
  • the connecting mattress 17 thus established between the pre-dial 15 and the optical lens 10 to be fitted surrounds peripherally, by coating it, the base 16 of the pre-wheel 15, by annularly forming around this base 16 the scope 25 specific to the grip of the drive tool 12.
  • this bearing 25 immediately extends from superstructure 18 of the pre-wheel 15, flush with it.
  • the span 25 extends to the edge 27 that the base 16 forms with the superstructure 18, thus being in some so in continuity with the latter.
  • the base 16 of the pre-wheel 15 has, in hollow, on its lower surface 28, a clearance 43, which is entirely circumscribed annularly by its periphery, and which is one-eyed.
  • the present invention is not limited to the embodiments described and shown, but includes any variant, in particular as regards concerns the number and / or configuration of the notches preferably provided on the lateral surface of the base of the pre-wheel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Coloring (AREA)
  • Prostheses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (14)

  1. Aufnahmewerkzeug zum Bearbeiten einer optischen Linse der Art, umfassend einerseits eine Fuß- bzw. Auflageplatte (16), durch welche es bestimmt ist, auf der zu bearbeitenden optischen Linse (10) zur Rotation mittels einer Verbindungsmatte bzw. eines Verbindungsstücks (17) aus in situ geschmolzenem bzw. gegossenem Metall mit einem niedrigen Schmelzpunkt festgelegt zu werden, und andererseits einen Überbau (18), durch welchen es fähig ist, durch ein Antriebswerkzeug (12) überdeckt bzw. abgedeckt zu werden, dadurch gekennzeichnet, daß die Fuß- bzw. Auflageplatte (16) in Umfangsrichtung in bezug auf den Überbau (18) zurückspringend ist.
  2. Aufnahmewerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß, indem mit der seitlichen Oberfläche (20) des Überbaus (18) eine Kante bzw. ein Rand (27) ausgebildet ist, die seitliche Oberfläche (26) der Fuß- bzw. Auflageplatte (16) ausgehend von dieser Kante (27) einen ersten Abschnitt (26A), der im wesentlichen kegelstumpfförmig ist und welcher in Richtung zu seiner unteren Oberfläche (28) konvergiert bzw. zusammenläuft, und einen zweiten Abschnitt (26B) umfaßt, der ebenfalls im wesentlichen kegelstumpfförmig ist, welcher jedoch im Gegensatz zu dem ersten in Richtung zu der unteren Oberfläche (28) divergierend bzw. sich aufweitend ist.
  3. Aufnahmewerkzeug nach Anspruch 2, dadurch gekennzeichnet, daß die seitliche Oberfläche (26) der Fuß- bzw. Auflageplatte (16) einen dritten Abschnitt (26C) umfaßt, welcher im wesentlichen zylindrisch ist und sich bis zu seiner unteren Oberfläche (28) erstreckt.
  4. Aufnahmewerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Fuß- bzw. Auflageplatte (16) vertieft auf ihrer seitlichen Oberfläche (26) wenigstens eine Kerbe bzw. Ausnehmung (29) umfaßt.
  5. Aufnahmewerkzeug nach den Ansprüchen 2 und 4, dadurch gekennzeichnet, daß parallel zur Achse (A) der Gesamtheit die Ausnehmung bzw. Kerbe (29) nur in einem Abstand von der Kante (27), welchen die Fußplatte (16) mit dem Überbau (18) ausbildet, ihren Ausgang nimmt.
  6. Aufnahmewerkzeug nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß parallel zu der Achse (A) der Gesamtheit die Ausnehmung bzw. Kerbe (29) sich bis zu der unteren Oberfläche (28) der Fuß- bzw. Auflageplatte (16) erstreckt, indem sie auf dieser unteren Oberfläche (28) einschneidet.
  7. Aufnahmewerkzeug nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Fuß- bzw. Auflageplatte (16) mehrere kreisförmig verteilte Ausnehmungen bzw. Kerben (29) umfaßt.
  8. Aufnahmewerkzeug nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die untere Oberfläche (28) der Fuß- bzw. Auflageplatte (16) eben ist.
  9. Aufnahmewerkzeug nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Fuß- bzw. Auflageplatte (16) vertieft an ihrer unteren Oberfläche (28) eine vollständig kreisförmig durch ihren Umfang umschriebene Vertiefung (43) aufweist, welche Vertiefung (43) blind bzw. unecht ist.
  10. Aufnahmewerkzeug nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Überbau (18) vertieft an seiner oberen Oberfläche (21) eine vollständig kreisförmig durch seinen Umfang umschriebene Vertiefung (23) aufweist, welche Vertiefung (23) blind bzw. unecht ist.
  11. Aufnahmewerkzeug nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß es eine Markierung mit winkeliger Ausrichtung bzw. Winkelmarkierung (33) umfaßt.
  12. Aufnahmewerkzeug nach Anspruch 11, dadurch gekennzeichnet, daß der Überbau (18) vertieft auf seiner oberen Oberfläche einen Quereinschnitt (24) aufweist, wobei die Winkelmarkierung (33) durch eine von diesem Quereinschnitt (24) um einen Winkel beabstandete Rinne gebildet ist.
  13. Verfahren zur Verwendung eines Greifblocks, umfassend ein Aufnahmewerkzeug in Übereinstimmung mit einem der Ansprüche 1 bis 12 der Art, gemäß welcher zwischen diesem Aufnahmewerkzeug (15) und der auszustattenden optischen Linse (10) für seine Rotationsfestlegung auf dieser eine Verbindungsmatte bzw. ein Verbindungsstück (17) aus in situ geschmolzenem bzw. gegossenem Metall mit niedrigem Schmelzpunkt angeordnet wird, dadurch gekennzeichnet, daß es derart durchgeführt wird, daß die Verbindungsmatte (17) in Umfangsrichtung die Fuß- bzw. Auflageplatte (16) des Aufnahmewerkzeugs (15) einspannt, indem ringförmig um diese Fuß- bzw. Auflageplatte (16) eine Kante bzw. ein Bereich (25) ausgebildet wird, die (der) für ein Angreifen eines Antriebswerkzeugs (12) geeignet ist.
  14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, daß es derart ist, daß sich parallel zur Achse (A) der Gesamtheit die Kante bzw. der Bereich (25) der Verbindungsmatte (17) unmittelbar ausgehend von dem Überbau (18) des Aufnahmewerkzeugs (15) auf gleicher Höhe mit diesem erstreckt.
EP96400919A 1995-05-03 1996-04-29 Aufnahmewerkzeug zum Bearbeiten von optischen Linsen und Verfahren zu dessen Handhabung Expired - Lifetime EP0740979B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505278A FR2733710B1 (fr) 1995-05-03 1995-05-03 Pre-molette pour le glantage d'une lentille optique, et son procede de mise en oeuvre
FR9505278 1995-05-03

Publications (2)

Publication Number Publication Date
EP0740979A1 EP0740979A1 (de) 1996-11-06
EP0740979B1 true EP0740979B1 (de) 1999-09-08

Family

ID=9478656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400919A Expired - Lifetime EP0740979B1 (de) 1995-05-03 1996-04-29 Aufnahmewerkzeug zum Bearbeiten von optischen Linsen und Verfahren zu dessen Handhabung

Country Status (7)

Country Link
US (1) US5669807A (de)
EP (1) EP0740979B1 (de)
AT (1) ATE184229T1 (de)
CA (1) CA2175645A1 (de)
DE (1) DE69604116T2 (de)
ES (1) ES2135855T3 (de)
FR (1) FR2733710B1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5972251A (en) * 1996-10-16 1999-10-26 Bausch & Lomb Incorporated Method for blocking a contact lens button
US6110016A (en) * 1998-06-22 2000-08-29 Ppg Industries Ohio, Inc. Lens block and method of processing lenses
ATE555875T1 (de) * 2002-01-09 2012-05-15 Hoya Corp Poierverfahren
DE10234628A1 (de) * 2002-07-29 2004-02-12 Rodenstock Gmbh Vollautomatisierbares Verfahren zum Blocken von optischen Linsen
DE102004023036A1 (de) * 2004-05-06 2005-12-29 Loh Engineering Ag, Oensingen Blockstück zum Haltern eines optischen Werkstücks, insbesondere einer Brillenlinse, für dessen Bearbeitung
DE102008022660A1 (de) 2008-05-07 2009-11-12 Schneider Gmbh & Co. Kg Verfahren zum Bearbeiten eines Brillenglasrohlings und Brillenglasrohling mit Verbindungsmasse und Blockstück
US8256753B2 (en) * 2009-06-17 2012-09-04 Productivity Systems, Llc High-density fixture vise
TW201136686A (en) * 2010-04-30 2011-11-01 Hon Hai Prec Ind Co Ltd Clamping device
WO2012069661A1 (de) * 2010-11-26 2012-05-31 Schneider Gmbh & Co. Kg Blockstück
USD666231S1 (en) * 2011-03-16 2012-08-28 Satisloh North America, Inc. Optic device securing structure
USD666228S1 (en) 2011-03-16 2012-08-28 Satisloh North America, Inc. Optic device securing structure
USD666229S1 (en) 2011-03-16 2012-08-28 Satisloh North America, Inc. Optic device securing structure
US9308617B2 (en) * 2011-03-16 2016-04-12 Satisloh North America, Inc. Securing structure for optic device
USD666230S1 (en) * 2011-03-16 2012-08-28 Satisloh North America, Inc. Optic device securing structure
USD753748S1 (en) * 2014-08-11 2016-04-12 Schneider Gmbh Co. Kg Block piece for optical lenses

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
USRE19015E (en) * 1933-12-05 Process of blocking ophthalmic
US1952373A (en) * 1924-04-10 1934-03-27 American Optical Corp Lens blocking device
US3383808A (en) * 1965-05-25 1968-05-21 Lunette De Paris Inc Lens block
FR1541963A (fr) * 1966-11-10 1968-10-11 Univis Bloc de support pour la fabrication de lentilles ophtalmologiques et procédé de fabrication à l'aide de ce bloc
US3512310A (en) * 1966-11-10 1970-05-19 Univis Inc Two-piece ring block for lens blanks
US3499253A (en) * 1966-12-06 1970-03-10 Textron Inc Lens block with shield plug
US3996701A (en) * 1975-06-30 1976-12-14 American Optical Corporation Lens block with preform
DE4214266A1 (de) * 1992-05-01 1993-11-04 Loh Engineering Ag Oensingen Vorrichtung zur fuehrung eines werkstuecks oder werkzeugs bei der bearbeitung torischer oder sphaerischer flaechen optischer linsen auf schleif- oder poliermaschinen
US5462475A (en) * 1993-02-12 1995-10-31 National Optronics, Inc. Blocking system for prescription lenses

Also Published As

Publication number Publication date
ES2135855T3 (es) 1999-11-01
FR2733710B1 (fr) 1997-07-18
US5669807A (en) 1997-09-23
DE69604116T2 (de) 2000-03-09
EP0740979A1 (de) 1996-11-06
DE69604116D1 (de) 1999-10-14
FR2733710A1 (fr) 1996-11-08
ATE184229T1 (de) 1999-09-15
CA2175645A1 (fr) 1996-11-04

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