WO1996009914A1 - Procede et dispositif pour obvier a la fragilite des aretes d'un verre de lunettes en materiau rigide, et verre de lunettes correspondant - Google Patents
Procede et dispositif pour obvier a la fragilite des aretes d'un verre de lunettes en materiau rigide, et verre de lunettes correspondant Download PDFInfo
- Publication number
- WO1996009914A1 WO1996009914A1 PCT/FR1995/001235 FR9501235W WO9609914A1 WO 1996009914 A1 WO1996009914 A1 WO 1996009914A1 FR 9501235 W FR9501235 W FR 9501235W WO 9609914 A1 WO9609914 A1 WO 9609914A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- axis
- tool
- deburring tool
- edge
- spectacle lens
- Prior art date
Links
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 spectacle lenses made of rigid material.
- spectacle lenses is meant here, in the usual manner, the pucks, of positive or negative focal power, and of usually circular initial contour, which are to be cut out for their adaptation to the specific contour of any spectacle frame to be fitted.
- edge In all cases, their edge, or peripheral edge, is generally cylindrical, and each of their faces intersects it along an edge, which, to date, is a sharp edge, and which, therefore, having regard to the rigidity of their constituent material, is relatively fragile.
- these spectacle lenses undergo, in manufacture, before their trimming, and, more precisely, before their delivery to the practitioners usually performing this trimming, a certain number of manipulations necessary, for example, for their soaking in various treatment solutions. , such as, for example, washing solutions, varnishing or solutions of another type.
- the present invention firstly relates to a method and a device making it possible to avoid these drawbacks by avoiding the fragility of at least one of the edges of a spectacle lens made of rigid material, and, in practice, to that of each of these; it also relates to any spectacle lens made of rigid material in which it has thus been obviated the fragility of at least one of the edges.
- such a ridge is replaced by a generally rounded connecting surface, which preferably is connected substantially tangentially to the edge, at least, of the spectacle lens, and which, more preferably still, is thus substantially connected. tangentially both to the edge of the spectacle lens and to the corresponding face thereof.
- the deburring tool In practice, it is carried out by machining, by applying a deburring tool to the edge to be treated, with a relative rotational movement between this deburring tool and the spectacle lens around the axis thereof. In practice, too, it is preferably made so that, during its action, the deburring tool can pivot relative to the spectacle lens around an axis. pivoting orthogonal to the axis thereof, with a displacement of this pivoting axis along a trajectory, which, contained in a plane passing through the axis of the spectacle lens, is generally oblique with respect thereto.
- the connecting surface intervening according to the invention between this edge and this face advantageousously avoids, in a particularly simple and effective manner, the formation of splinters at the periphery of this spectacle lens during subsequent manipulations thereof.
- the tool used for this purpose extends generally transversely with respect to the axis of the lens and is driven by an oscillating movement around its own axis.
- FIG. 1 is an elevation view of a clean machining device in the implementation of the invention, for a first type of deburring tool, and with, partially shown, in axial section, a spectacle lens to be treated;
- Figure 2 is a partial perspective view of this machining device;
- Figure 3 is a partial view in cross section along the line III-III of Figure 1;
- Figure 4 is an elevational view similar to that of Figure 1, for a second type of deburring tool;
- Figure 5 is, on a larger scale, an axial sectional view of the peripheral part of a spectacle lens to which the invention has been applied.
- the spectacle lens 10 is made of rigid material, and, more precisely, of rigid organic material.
- this spectacle lens 10 may be polycarbonate, a composition based on diethylene glycol diallylcarbonate, or a composition of the type of those which are the subject of French patents published under Nos. 2,699,541 and 2,703,056.
- this spectacle lens 10 has a concave rear face 11, a convex front face 11 ′ and, along a cylindrical contour, and in circular practice, a slice 12 forming the peripheral edge of the assembly.
- Al be the optical axis of this spectacle lens 10.
- the wafer 12 is a cylindrical wafer defined by generatrices parallel to this axis A1.
- the edge 12 normally intersects the faces 11, 11 'along two sharp edges 13, 13'.
- D be the diameter of the cylinder along which the edge 12 extends, that is to say that of the peripheral contour of the faces 11, 11 ′, and let E be measured from one of the edges 13 to the other, 13 ', the axial extension of the wafer 12, that is to say the thickness of the spectacle lens 10 along its peripheral edge.
- a connecting surface 14, 14' generally rounded, which, preferably, connects substantially tangentially to the edge 12, at least, of the spectacle lens 10.
- this connecting surface 14, 14 ′ is connected substantially tangentially both to the edge 12 of the spectacle lens 10 and to the corresponding face 11, 11 ′ thereof. According to the invention, it is proposed, to do this, to subject the spectacle lens 10 to a machining pass during which, according to arrangements described in more detail later, a deburring tool 15, 15 'is applied to its edge 13, 13 'to be treated, with a relative rotational movement between this deburring tool 15, 15' and the spectacle lens 10 around the axis Al thereof.
- the deburring tool 15, 15 ' can pivot relative to the spectacle lens 10 around a pivot axis A2 orthogonal to the axis Al thereof, with a displacement of this pivot axis A2 along a path T, T 'which, contained in a plane passing through the axis Al of the glass of glasses 10, is generally oblique with respect thereto.
- the pivot axis A2 is shown diagrammatically by its trace in FIGS. 1 and 4, and it is represented in broken lines in figure 2.
- a machining device 16 is used for the intervention of the deburring tool 15, 15 ′.
- This machining device 16 can for example equip a machine 17, with numerical control, of the type of those sold under the commercial designation "EMCOTURN 320" by the company EMCO for the overflowing of spectacle lenses 10 when such overflowing is systematically practiced after manufacture for the elimination of a peripheral zone liable to be affected by microcracks which could cause difficulties during a possible subsequent treatment.
- this machine 17 essentially comprises, on the one hand, support means 18, capable of receiving the spectacle lens 10 to be treated and of driving it in rotation around an axis which, in practice, and as shown diagrammatically by the arrow FI in FIG. 1, is the axis Al thereof, and, on the other hand, drive means 19, capable of moving in a passing plane by this axis A1 a tool support 20, 20 '.
- the support means 18 can be constituted by a spindle, which, coaxial with the axis Al, is subjected to means for driving in rotation about this axis Al, and which, at its end, is equipped, for supporting the spectacle lens 10, of any gripping device 21, such as, for example, a suction cup or an acorn.
- these support means 18 can be constituted by two pins, or two half-pins, which, aligned with each other, are capable of enclosing between them the spectacle lens 10.
- the reference A1 will designate indifferently, in the following, the optical axis of the spectacle lens 10 and the axis of rotation of the support means 18.
- the drive means 19 comprising, for their part, a turret 22 which is mounted angularly adjustable in position about an axis A3 parallel to the axis of rotation A1 of the support means 18, and which, circularly, around this axis A3, comprises, at a distance from each other, at least two separate tool supports, namely, a tool support 20 equipped with a clean deburring tool 15 to the treatment of the rear edge 13 of the spectacle lens 10, and a tool support 20 ′ equipped with a deburring tool 15 ′ specific to the treatment of the edge 13 ′ before this spectacle lens 10.
- the turret 22 also carries a third tool support, not shown, equipped with a bridging tool.
- the tool supports 20, 20 ′ are mounted radially movable on the turret 22 and lockable in position thereon.
- the turret 22 is, for example, carried by an XY table 23, which, itself by a fixed frame 24, comprises elements 25X, 25Y with crossed movements.
- the element 25X which carries the turret 22, and which is controlled by a motor 2 X, is movable parallel to the axis of rotation Al of the support means 18, and, jointly, and as shown diagrammatically by the arrow F ⁇ in FIG. 1, the element 25Y, which carries l element 25X, which is controlled by a motor 26Y, is mounted movable along an axis perpendicular to this axis of rotation A1.
- the motors 26X, 26Y are controlled by a common control unit 28. It is from the combination of the movements that they induce that a trajectory T, T 'results for the tool support 20, 20', and therefore for the pivot axis A2 of the deburring tool 15 , 15 '.
- the deburring tool 15 is pivotally mounted on the tool support 20 which carries it, around the pivot axis A2 orthogonal to the axis of rotation A1 of the support means 18, and it is subjected to elastic return means 29 which urge it permanently in the direction of a fixed fixed rest position, shown in solid lines in FIG. 1.
- the deburring tool 15 is an abrasive tool.
- its working surface 30 is a cylindrical surface of axis A4 orthogonal to its pivot axis A2 and of circular cross section.
- the deburring tool 15 is in the form of a sleeve which is elongated in the manner of a stick, and which, at one of its ends, is closed transversely by a bottom 31.
- the tool support 20 comprises, on the one hand, a finger 32, on which the deburring tool 15 is attached by means of a support piece 34 pivotally engaged on a pin 35 which projects from this finger 32 perpendicular to the axis of rotation A1 of the support means 18, and, on the other hand, a sole 36, by which it is attached to the turret 22, and which carries the finger 32.
- the finger 32 extends substantially perpendicular to the sole 36.
- the support part 34 is in the form of a yoke, and it is by its wings 37 that it is pivotally engaged on the pin 35.
- a split elastic ring 40 engaged with a groove in the journal 35, ensures the retention of this support piece
- the support piece 34 also has a heel 41 by which it bears on the finger 32 of the tool support 20 in the rest position.
- this heel 41 is formed by a lateral extension of the middle part 42 of the support piece 34.
- the deburring tool 15 is set in rotation relative to the axis A4 of its working surface 30.
- the deburring tool 15 is however mounted angularly adjustable in position around the axis A4 of its working surface 30.
- a stud 43 which, for example, has, at one of its ends, a threaded section 44 by which it is in screw connection with a threaded bore 45 of the bottom 31 of this deburring tool 15, and which, moreover, has, at its other end, a threaded section 46 by which, after crossing the support piece 34, and , more precisely, from the central part 42 thereof by means of a bore 47, it is in screw connection with a locking nut 48.
- the elastic return means 29 to which the deburring tool 15 is subjected are formed by a torsion spring, the median torsion part 50 of which is engaged on the pin 35, between the wings 37 of the support piece 34, and one of the arms 51 of which bears on this support piece 34, while being engaged under a right-angled return 52 which one of these lateral wings 37 presents internally for this purpose, while the another of these branches 51 is supported on the finger 32 of the tool support 20, for example for this purpose comprising a return square 53 by which it is engaged in a bore 54 of this finger 32.
- the axis A4 of the working surface 30 of the deburring tool 15 extends substantially perpendicular to the axis of rotation A1 of the support means 18, and therefore to the optical axis of the spectacle lens 10.
- the spectacle lens 10 is rotated by the support means 18, and, having regard to the path T followed, according to the conditions specified above, by the pivot axis A2 of the tool deburring 15, this deburring tool 15 comes into contact with its rear edge 13 by one of the generatrices of its working surface 30.
- this connecting surface 14 is connected substantially tangentially to the edge 12, at least, of the spectacle lens 10.
- the tests confirm that it is in practice well thus with the machining device 16 described, it is connected substantially tangentially both to the edge 12 of the spectacle lens 10 and to the rear face 11 thereof. .
- connection surface 14 with respect to the rear face 11 of the spectacle lens 10
- arrangements are made so that, initially, for the rest position of the assembly , the axis A4 of the working surface 30 of the deburring tool 15 is inclined accordingly.
- the finger 32 of the tool support 20 can be pivotally and angularly adjustable in position on the sole 36 which carries it.
- the radial extension r of the connection surface 14 on the rear face 11 of the spectacle lens 10 from the edge 12 is between 0.1 and 1 mm, and, likewise, its axial extension e on the edge 12 from this rear face 11, that is to say from the corresponding rear edge 13, is between 0.1 and 1 mm, FIG. 5.
- the generatrix of this connecting surface 14 in a radial plane of the spectacle lens 10 can be a curve of any shape.
- it is an arc of a radius between 0.15 and 0.5 mm, and, for example, 0.25 mm, and tests show that this is in practice well with the machining device 16 described.
- the generator of the connecting surface 14 may however have a completely different configuration, and, for example, be elliptical.
- the deburring tool 15 'used for machining the edge 13' before the spectacle lens 10 is identical to the previous deburring tool 15.
- the corresponding angle is for example of the order of 45 °.
- connection surface 14 'obtained is of the same type as the connection surface 14, and its radial and axial extensions are substantially of the same order.
- trajectory T, T 'of the tool support 20, 20' can be arbitrary.
- the angle it makes with the axis of rotation A1 of the support means 18 is preferably between 30 ° and 45 °
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)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/809,472 US5964647A (en) | 1994-09-27 | 1995-09-26 | Method and device for remedying the fragility of the edges of a spectacle lens made of rigid material and corresponding spectacle lens |
EP95932056A EP0783392A1 (fr) | 1994-09-27 | 1995-09-26 | Procede et dispositif pour obvier a la fragilite des aretes d'un verre de lunettes en materiau rigide, et verre de lunettes correspondant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9411499A FR2725047B1 (fr) | 1994-09-27 | 1994-09-27 | Procede et dispositif pour obvier a la fragilite des aretes d'une lentille ophtalmique, et lentille ophtalmique correspondante |
FR94/11499 | 1994-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996009914A1 true WO1996009914A1 (fr) | 1996-04-04 |
Family
ID=9467301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1995/001235 WO1996009914A1 (fr) | 1994-09-27 | 1995-09-26 | Procede et dispositif pour obvier a la fragilite des aretes d'un verre de lunettes en materiau rigide, et verre de lunettes correspondant |
Country Status (4)
Country | Link |
---|---|
US (1) | US5964647A (fr) |
EP (1) | EP0783392A1 (fr) |
FR (1) | FR2725047B1 (fr) |
WO (1) | WO1996009914A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2751256A1 (fr) * | 1996-07-22 | 1998-01-23 | Briot Int | Machine de meulage de verres optiques |
FR2751255A1 (fr) * | 1996-07-22 | 1998-01-23 | Briot Int | Machine de meulage de verres optiques |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8556678B2 (en) * | 2000-01-18 | 2013-10-15 | Ncrx Optical Solutions, Inc. | System and method pre-blocking ophthalmic lens for processing including articulation edging |
FR2852878B1 (fr) * | 2003-03-27 | 2006-09-29 | Briot Int | Machine de meulage de verres optiques. |
FR2856056B1 (fr) * | 2003-06-13 | 2009-07-03 | Essilor Int | Procede de traitement d'un verre apte au debordage. |
DE102004042489B4 (de) * | 2004-08-31 | 2012-03-29 | Siemens Ag | Medizinische Untersuchungs- oder Behandlungseinrichtung mit dazugehörigem Verfahren |
DE102004051155A1 (de) * | 2004-10-21 | 2006-04-27 | Carl Zeiss Ag | Aufnahmevorrichtung für ein optisches Element |
US7001249B1 (en) * | 2005-01-11 | 2006-02-21 | Guardian Industries, Inc. | Methods and systems for finishing edges of glass sheets |
FR2884163B1 (fr) * | 2005-04-07 | 2007-07-06 | Briot Internat Sa | Machine de meulage de verres optiques munie d'une meule de finition inclinee et verre optique correspondant |
DE102013218136B3 (de) * | 2013-09-11 | 2015-02-12 | Carl Zeiss Vision International Gmbh | Brillenglas-Halb- oder -Fertigfabrikat, Verfahren zu dessen Herstellung und Verfahren zum Beschichten eines Brillenglas-Halb- oder -Fertigfabrikats |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528326A (en) * | 1967-08-30 | 1970-09-15 | Lauren G Kilmer | Contact lens edging apparatus |
US3641991A (en) * | 1970-04-27 | 1972-02-15 | Arno Haber | Ceramic ware deburring machine and dressing heads |
US3736115A (en) * | 1971-07-06 | 1973-05-29 | Bausch & Lomb | Apparatus for and method of edge machining flexible contact lenses |
US3778936A (en) * | 1972-05-12 | 1973-12-18 | Norton Co | Mounted abrasive point |
FR2184473A1 (fr) * | 1972-05-18 | 1973-12-28 | Essilor Int | |
DE2702261A1 (de) * | 1976-01-20 | 1977-07-21 | Headway Research Inc | Verfahren und vorrichtung zum schleifen der kanten eines zerbrechlichen werkstuecks |
DE3338240A1 (de) * | 1982-10-27 | 1984-05-03 | Z. Bavelloni S.p.A., 22070 Bregnano, Como | Vorrichtung zum bearbeiten der kanten von glastafeln |
EP0515036A2 (fr) * | 1991-05-24 | 1992-11-25 | Shin-Etsu Handotai Company Limited | Appareil pour chamfreiner l'arête périphérique d'une plaquette semi-conductrice avec finition miroir |
US5299394A (en) * | 1992-03-16 | 1994-04-05 | Surdacki Richard G | Method and apparatus for buffing spherical parts |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8816182D0 (en) * | 1988-07-07 | 1988-08-10 | Berkshire Ophthalmic Lab Ltd | Method & apparatus for grinding lenses |
JPH02109671A (ja) * | 1988-10-20 | 1990-04-23 | Olympus Optical Co Ltd | レンズ研削機およびレンズ加工方法 |
US5158422A (en) * | 1991-03-01 | 1992-10-27 | National Optronics, Inc. | Method and apparatus for shaping and finishing lenses |
US5454748A (en) * | 1991-09-05 | 1995-10-03 | Wernicke & Co. Gmbh | Process, block for sucker or a machine for grinding or machining the edge of eyeglass lenses and a process for grinding eyeglass lenses |
-
1994
- 1994-09-27 FR FR9411499A patent/FR2725047B1/fr not_active Expired - Fee Related
-
1995
- 1995-09-26 WO PCT/FR1995/001235 patent/WO1996009914A1/fr not_active Application Discontinuation
- 1995-09-26 US US08/809,472 patent/US5964647A/en not_active Expired - Fee Related
- 1995-09-26 EP EP95932056A patent/EP0783392A1/fr not_active Ceased
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528326A (en) * | 1967-08-30 | 1970-09-15 | Lauren G Kilmer | Contact lens edging apparatus |
US3641991A (en) * | 1970-04-27 | 1972-02-15 | Arno Haber | Ceramic ware deburring machine and dressing heads |
US3736115A (en) * | 1971-07-06 | 1973-05-29 | Bausch & Lomb | Apparatus for and method of edge machining flexible contact lenses |
US3778936A (en) * | 1972-05-12 | 1973-12-18 | Norton Co | Mounted abrasive point |
FR2184473A1 (fr) * | 1972-05-18 | 1973-12-28 | Essilor Int | |
DE2702261A1 (de) * | 1976-01-20 | 1977-07-21 | Headway Research Inc | Verfahren und vorrichtung zum schleifen der kanten eines zerbrechlichen werkstuecks |
DE3338240A1 (de) * | 1982-10-27 | 1984-05-03 | Z. Bavelloni S.p.A., 22070 Bregnano, Como | Vorrichtung zum bearbeiten der kanten von glastafeln |
EP0515036A2 (fr) * | 1991-05-24 | 1992-11-25 | Shin-Etsu Handotai Company Limited | Appareil pour chamfreiner l'arête périphérique d'une plaquette semi-conductrice avec finition miroir |
US5299394A (en) * | 1992-03-16 | 1994-04-05 | Surdacki Richard G | Method and apparatus for buffing spherical parts |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2751256A1 (fr) * | 1996-07-22 | 1998-01-23 | Briot Int | Machine de meulage de verres optiques |
FR2751255A1 (fr) * | 1996-07-22 | 1998-01-23 | Briot Int | Machine de meulage de verres optiques |
EP0820837A1 (fr) * | 1996-07-22 | 1998-01-28 | Briot International | Machine de meulage de verres optiques |
US5882247A (en) * | 1996-07-22 | 1999-03-16 | Briot International | Machine for grinding of optical glasses |
Also Published As
Publication number | Publication date |
---|---|
EP0783392A1 (fr) | 1997-07-16 |
US5964647A (en) | 1999-10-12 |
FR2725047A1 (fr) | 1996-03-29 |
FR2725047B1 (fr) | 1997-01-31 |
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