EP0744246B1 - Gabarit de calibrage pour l'étalonnage d'une meuleuse pour lentille ophtalmique, et procédé d'étalonnage correspondant - Google Patents
Gabarit de calibrage pour l'étalonnage d'une meuleuse pour lentille ophtalmique, et procédé d'étalonnage correspondant Download PDFInfo
- Publication number
- EP0744246B1 EP0744246B1 EP96401105A EP96401105A EP0744246B1 EP 0744246 B1 EP0744246 B1 EP 0744246B1 EP 96401105 A EP96401105 A EP 96401105A EP 96401105 A EP96401105 A EP 96401105A EP 0744246 B1 EP0744246 B1 EP 0744246B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gauging
- template according
- contour
- template
- hollow bosses
- 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
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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
- 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
- B24B9/146—Accessories, e.g. lens mounting devices
-
- 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 the calibration to be performed when starting up a ophthalmic lens grinder of the type described in FR-A-2 543 039 to have a precise reference for its various parameters, it being understood that this calibration can then be periodically renewed, especially when changing or brightening up a grinding wheel.
- the calibration template according to the invention is of generally characterized in that, intended to be mounted instead of an ophthalmic lens on the grinder calibrate, it comes in the general form of a disc, and in that, circular over at least part of its perimeter, its outline locally forms two points angular, which, circumscribed by the same circumference, are angularly spaced from each other.
- the calibration template according to the invention is still characterized in that, on at least a portion of the portion circular in outline, its periphery forms a bevel.
- the calibration template according to the invention is still characterized in that, on at least a portion of the portion circular in outline, its periphery is smooth and cylindrical.
- This calibration takes advantage of this portion smooth and cylindrical around the periphery of the calibration template according to the invention to know the overall diameter of a grinding wheel in the case of a roughing wheel or a grinding wheel finishing in ice mode, and thus power later satisfy the overcalibration value to be respected for the corresponding draft, however, that by doing the same with the portion of this periphery forming a bevel, it is also possible to satisfy the ratings to be respected for the finished ophthalmic lens.
- the calibration template according to the invention is further characterized in that it comprises two hollow bosses, which, angularly offset from each other, make each protruding respectively on its two faces while being in continuity with each other, the bottom of each of these hollow bosses connecting continuously with the top of the other by a connecting wall, which, common to both hollow bosses, extends from one to the other of these.
- the grinder has at least one probe which, by application to one and / or the other of the faces of the ophthalmic lens, allows a reading of trajectories to the right of the end of the bevel to ensure, it takes advantage, during calibration, of the hollow bosses of the template according to the invention to check the position of the or probes thus present on the grinder, and power so later properly determine the position to be observed for the ophthalmic lens.
- These hollow bosses also advantageously allow to check the linearity of this or these probes.
- the grinder 10 comprises, overall, on the one hand, a scale 11, which is mounted freely pivoting around a first axis A1, in practice a horizontal axis, on a chassis not shown, and which, for the support and maintenance of an ophthalmic lens 12 to be machined, is equipped with two support pins 13 aligned one with the other along a second axis A2 parallel to the first axis A1 and duly driven in rotation by a motor also not shown, and, on the other hand, at least one grinding wheel 14, which is stalled in rotation on a third axis A3 parallel to the first axis A1, and which is also duly rotated by an engine not shown.
- grinding wheels 14 are provided in parallel on the third axis A3, for a roughing and a finishing of the ophthalmic lens 12 to be machined, and the assembly is carried by a carriage, also not shown, mounted movable parallel to the first axis A1.
- FIG. 1 only a grinding wheel 14 has been provided, and in practice it is a finishing wheel having a groove 15 for machining a bevel on the lens ophthalmic 12.
- the grinder 10 further comprises a link 16, which, articulated to the chassis around the same first axis A1 as the flip-flop 11 at one of its ends, is articulated, at the other of its ends, following a fourth axis A4 parallel to the first axis A1, with a nut 17 movable climb along a fifth axis A5, commonly known as the axis restitution, perpendicular to the first axis A1, with, intervening between this link 16 and the rocker 11, a contact sensor 18.
- a link 16 which, articulated to the chassis around the same first axis A1 as the flip-flop 11 at one of its ends, is articulated, at the other of its ends, following a fourth axis A4 parallel to the first axis A1, with a nut 17 movable climb along a fifth axis A5, commonly known as the axis restitution, perpendicular to the first axis A1, with, intervening between this link 16 and the rocker 11, a contact sensor 18.
- the nut 17 is a tapped nut in screwed engagement with a rod threaded 38 which, aligned along the fifth axis A5, is driven in rotation by a motor 19.
- the contact sensor 18 is consisting of a Hall effect cell.
- the ophthalmic lens 12 to be machined When, duly clamped between the two pins of support 13, the ophthalmic lens 12 to be machined is brought to the contact with grinding wheel 14, it is being removed number of materials until flip-flop 11 abuts against the link 16 following a support which, being level of the contact sensor 18, is duly detected by this one.
- control unit duly programmed for this purpose, and not shown, coordinates this double surgery.
- the first axis A1 and the third axis A3 being fixed axes on the chassis of the assembly, it agrees that, in the overall rotation frame, the angular position of the second axis A2 relative to the third axis A3, defined by the angle T made by the flip-flop 11 by relation to the plane containing the first axis A1 and the third axis A3, can be duly identified.
- the calibration template 20 shown in the figures 3 to 8 in particular aims to facilitate this calibration.
- This calibration template 20 which is intended to be mounted on the grinder 10 to be calibrated, instead of a ophthalmic lens 12, comes in the general form of a disc, of general thickness E, with, projecting in its central zone, a hollow boss 21 suitable for allowing its mounting on the support pins 13 of this grinder 10.
- the outline 22 of this calibration template 20 is circular over at least part of its perimeter, specified later, but locally forms two points angular 23, which, circumscribed by the same circumference C, are angularly separated from each other.
- these angular points 23 delimit two angles at the center.
- the outline 22 of the calibration template 20 is generally concave in the angle at the center A'1 the most low.
- the circumference C which circumscribes the two angular points 23 is the one along which the circular part 22A of the outline 22.
- the two angular points 23 generally result from the intersection of this circular part 22A with a notch 22B notching the periphery of the calibration template 20.
- the contour 22 of the calibration template 20 has, overall, two parts, namely, a part circular 22A, which extends at the angle at the center A'2 the more developed, and a concave part which is formed by the notch 22B notching its periphery, and which extends along the lowest center angle A'1.
- the notch 22B itself has in practice a profile globally circular.
- the two angular points 23 of the contour 22 are separated one of the other 90 °.
- the angle at the center A'1 which underlies them is equal to 90 °.
- the periphery of the template calibration 20 according to the invention forms a bevel 25 ', 25' '.
- the periphery of the calibration template 20 forms a 25 ', 25' 'bevel on two separate 24', 24 '' portions, at least, of the circular part 22A of its contour 22, and the 25 ', 25' 'corresponding bevels are different.
- the dihedral D 'formed by the bevel 25' is equal to 90 °, figure 7, while that D '' that forms the bevel 25 '' is equal to 120 °, figure 8.
- the two corresponding 24 ', 24' 'portions of the periphery of the template 20 are adjacent, and, generally arranged at distance from one and from the other of the angular points 23, they each extend at an angle to the center substantially equal to 60 °.
- bevels 25 ', 25' 'each have their edges truncated by a flat cylindrical.
- the periphery of the template calibration 20 according to the invention is smooth and cylindrical.
- two smooth, cylindrical 26 ', 26' 'portions are provided, count, each respectively, of the two angular points 23.
- the portion 26 ' extends along a angle at the center substantially equal to 60 °, while the other, the portion 26 '', extends at a substantially central angle equal to 90 °.
- the calibration template 20 also comprises two hollow bosses 27A, 27B, which angularly offset from each other, each make respectively protruding on its two faces 28A, 28B while being in continuity with each other, the bottom 29 of each of these hollow bosses 27A, 27B connecting continuously with the top 30 of the other by a connecting wall 31, which, common to the two hollow bosses 27A, 27B, extends from one to the other of these, crossing right through the general thickness E even of the calibration template 20.
- the connecting wall 31 extends generally at an angle with respect to the faces 28A, 28B, making for example with each of these an angle of the order of 45 °, and it is a flat wall whose thickness e , which is that of all the walls of the hollow bosses 27A, 27B, is much less than the general thickness E of the calibration template 20.
- bosses hollows 27A, 27B extend generally circularly, to distance from the circular part 22A of the contour 22, in the most developed center angle A'2.
- the bottom 29 of these hollow bosses 27A, 27B is flat, and it extends substantially parallel to the faces 28A, 28B of the calibration template 20.
- the calibration template 20 has a lug 32A, 32B projecting from each of its faces 28A, 28B.
- these pins 32A, 32B are at the right of each other.
- this rocker 11 is lowered, under the control of the nut 17, until the calibration template 20 comes to bear on the grinding wheel 14 by one of its angular points 23, such as shown in Figure 9A.
- the contact sensor 18 detects the corresponding contact.
- the calibration template 20 then rests on the grinding wheel 14 by its two angular points 23, as shown in Figure 9C.
- the angular value corresponding to the minimum reading R obtained is put in memory, and it will be used as a reference for establishing deposit tables for the second axis A2 to be respected during the machining of an ophthalmic lens 12.
- the template calibration 20 is then applied to the grinding wheel 14 by that of its bevels 25 ', 25 "which corresponds to the groove 15 of this one.
- the calibration template 20 is then in the position shown in Figure 10B, for which it is engaged by its bevel 25 ', or 25' ', in the groove 15 of the grinding wheel 14.
- the value of the Z position of the grinding wheel 14 on the third axis A3 is then stored, and it is she who will be taken into account for the establishment of the return instructions.
- These operations also determine the diameter of the grinding wheel 14 at the bottom of its groove 15, if, as in the present case, it is a finishing wheel, and, by operations analogues then bringing into play a portion 26 ', 26' 'smooth and cylindrical of the calibration template 20, the overall diameter of this grinding wheel 14, if it is a grinding wheel roughing.
- the corresponding value is memory, and it will be used for establishment of refund deposit tables.
- the grinder 10 has at minus one probe 35, and, for example, two probes 35, as shown, the linearity of these, after the pins 32A, 32B have allowed visually check the position.
- the feelers 35 are first brought into back gauge, so that the origin of their local benchmarks are well defined.
- the calibration template 20 is then pivoted around the second axis A2, so that, as shown schematically in broken lines in FIG. 11, the probes 35 arrive in contact with the bottom 29 and the top 30 of the hollow boss 27B.
- the The values read are, as before, stored in memory.
- the present invention is not not limited to the embodiment described and shown, but includes any variant of execution and / or implementation work, in particular with regard to the order of operations to during the implementation of the calibration template according to the invention.
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)
Description
Claims (17)
- Gabarit de calibrage pour l'étalonnage d'une meuleuse pour lentille ophtalmique, caractérisé en ce que, destiné à être monté au lieu et place d'une lentille ophtalmique (12) sur la meuleuse (10) à étalonner, il se présente sous la forme générale d'un disque, et en ce que, circulaire sur une partie au moins de son périmètre, son contour (22) forme, localement, deux pointes anguleuses (23) qui, circonscrites par une même circonférence (C), sont angulairement écartées l'une de l'autre.
- Gabarit de calibrage suivant la revendication 1, caractérisé en ce que, dans le plus faible (A'1) des deux angles au centre (A'1, A'2) délimités par les pointes anguleuses (23), son contour (22) est globalement concave.
- Gabarit de calibrage suivant l'une quelconque des revendications 1, 2, caractérisé en ce que la circonférence (C) qui circonscrit les deux pointes anguleuses (23) de son contour (22) est celle suivant laquelle s'étend la partie circulaire (22A) de celui-ci.
- Gabarit de calibrage suivant la revendication 3, caractérisé en ce que les deux pointes anguleuses (23) de son contour (22) résultent de l'intersection de la partie circulaire (22A) de celui-ci avec une encoche (22B) entaillant sa périphérie.
- Gabarit de calibrage suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que les deux pointes anguleuses (23) de son contour (22) sont écartées l'une de l'autre de 90°.
- Gabarit de calibrage suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que, sur une portion (24', 24''), au moins, de la partie circulaire (22A) de son contour (22), sa périphérie forme un biseau (25', 25'').
- Gabarit de calibrage suivant la revendication 6, caractérisé en ce que sa périphérie forme un biseau (25', 25'') sur deux portions (24', 24'') distinctes, au moins, de la partie circulaire (22A) de son contour (22), et les biseaux (25', 25'') correspondants sont différents.
- Gabarit de calibrage suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que, sur une portion (26', 26''), au moins, de la partie circulaire (22A) de son contour (22), sa périphérie est lisse et cylindrique.
- Gabarit de calibrage suivant l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comporte deux bossages creux (27A, 27B), qui, décalés angulairement l'un par rapport à l'autre, font chacun respectivement saillie sur ses deux faces (28A, 28B) tout en étant en continuité l'un avec l'autre, le fond (29) de chacun de ces bossages creux (27A, 27B) se raccordant en continu avec le sommet (30) de l'autre par une paroi de liaison (31), qui, commune aux deux bossages creux (27A, 27B), s'étend de l'un à l'autre de ceux-ci.
- Gabarit de calibrage suivant la revendication 9, caractérisé en ce que la paroi de liaison (31) commune aux deux bossages creux (27A, 27B) s'étend globalement en biais par rapport à ses faces (28A, 28B).
- Gabarit de calibrage suivant l'une quelconque des revendications 9, 10, caractérisé en ce que la paroi de liaison (31) commune aux deux bossages creux (27A, 27B) est plane.
- Gabarit de calibrage suivant l'une quelconque des revendications 9 à 11, caractérisé en ce que le fond (29) des deux bossages creux (27A, 27B) est plat.
- Gabarit de calibrage suivant la revendication 12, caractérisé en ce que le fond (29) des deux bossages creux (27A, 27B) s'étend parallèlement à ses faces (28A, 28B).
- Gabarit de calibrage suivant l'une quelconque des revendications 9 à 13, caractérisé en ce que les deux bossages creux (27A, 27B) s'étendent globalement circulairement.
- Gabarit de calibrage suivant l'une quelconque des revendications 1 à 14, caractérisé en ce qu'il présente un ergot (32A, 32B) en saillie sur chacune de ses faces (28A, 28B).
- Gabarit de calibrage suivant la revendication 14, caractérisé en ce que, d'une de ses faces (28A, 28B) à l'autre, les ergots (32A, 32B) sont au droit l'un de l'autre.
- Procédé pour l'étalonnage d'une meuleuse (10) pour lentille ophtalmique (12), caractérisé en ce qu'il implique la mise en oeuvre d'un gabarit de calibrage (20) conforme à l'une quelconque des revendications 1 à 16.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9506239A FR2734505B1 (fr) | 1995-05-24 | 1995-05-24 | Gabarit de calibrage pour l'etalonnage d'une meuleuse pour lentille ophtalmique, et procede d'etalonnage correspondant |
| FR9506239 | 1995-05-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0744246A1 EP0744246A1 (fr) | 1996-11-27 |
| EP0744246B1 true EP0744246B1 (fr) | 1999-03-17 |
Family
ID=9479370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96401105A Expired - Lifetime EP0744246B1 (fr) | 1995-05-24 | 1996-05-22 | Gabarit de calibrage pour l'étalonnage d'une meuleuse pour lentille ophtalmique, et procédé d'étalonnage correspondant |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5806198A (fr) |
| EP (1) | EP0744246B1 (fr) |
| JP (1) | JP3872132B2 (fr) |
| DE (1) | DE69601748T2 (fr) |
| ES (1) | ES2128823T3 (fr) |
| FR (1) | FR2734505B1 (fr) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5960550A (en) * | 1997-07-31 | 1999-10-05 | Sola International, Inc. | Device and method for marking ophthalmic lenses and molds |
| FR2784919B1 (fr) * | 1998-10-22 | 2001-02-09 | Essilor Int | Procede pour l'etalonnage d'une meuleuse pour lentille ophtalmique, et calibre d'etalonnage propre a sa mise en oeuvre |
| FR2838363B1 (fr) * | 2002-04-12 | 2004-12-24 | Essilor Int | Procede de meulage d'une lentille ophtalmique comportant une etape de releve sans contact |
| FR2838364B1 (fr) * | 2002-04-12 | 2005-01-07 | Essilor Int | Procede de chanfreinage d'une lentille ophtalmique comporatnt une etape de releve sans contact |
| FR2851947B1 (fr) * | 2003-03-07 | 2006-09-22 | Essilor Int | Procede d'usinage d'une lentille ophtalmique. |
| FR2860888B1 (fr) * | 2003-10-10 | 2006-03-17 | Briot Int | Procede d'etalonnage d'une machine de percage de verres ophtalmiques, dispositif pour la mise en oeuvre d'un tel procede, et appareil d'usinage de verres opthalmiques equipe d'un tel dispositif. |
| JP4908755B2 (ja) * | 2004-12-21 | 2012-04-04 | ヴァルター マシーネンバウ ゲゼルシャフト ミット ベシュレンクテル ハフツング | 研削機械の較正方法および再較正方法並びに当該方法を実行するデバイスを有する機械 |
| FR2893523B1 (fr) * | 2005-11-21 | 2008-01-18 | Essilor Int | Methode d'etalonnage d'une meuleuse et dispositif correspondant |
| JP5500583B2 (ja) * | 2009-09-30 | 2014-05-21 | 株式会社ニデック | 眼鏡レンズ加工装置 |
| JP5500579B2 (ja) | 2009-09-30 | 2014-05-21 | 株式会社ニデック | 眼鏡レンズ加工装置の較正用センサユニット |
| JP5500584B2 (ja) * | 2010-03-02 | 2014-05-21 | 株式会社ニデック | 眼鏡レンズ加工装置 |
| FR2966072B1 (fr) | 2010-10-15 | 2012-10-19 | Essilor Int | Gabarit d'etalonnage d'une machine d'usinage d'une lentille ophtalmique, dispositif et procede utilisant un tel gabarit |
| KR102055137B1 (ko) * | 2017-09-27 | 2019-12-12 | 주식회사 휴비츠 | 홀 센서를 이용한 안경 렌즈 가공 장치 및 방법 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US69953A (en) * | 1867-10-15 | Improvement in fixed calipee gauges | ||
| US2190582A (en) * | 1938-06-30 | 1940-02-13 | Fayette E Wolf | Template for edging lenses |
| US2317925A (en) * | 1940-05-28 | 1943-04-27 | American Optical Corp | Gauge |
| US3501842A (en) * | 1967-10-17 | 1970-03-24 | Univis Inc | Method and apparatus for blocking multifocal lens blanks |
| US4299032A (en) * | 1980-04-21 | 1981-11-10 | American Optical Corporation | Spectacles lens-frame fitting coordinator |
| FR2543039B1 (fr) * | 1983-03-22 | 1985-08-09 | Essilor Int | Procede pour le biseautage d'une lentille ophtalmique, et machine a meuler automatique correspondante |
| US4727654A (en) * | 1985-11-14 | 1988-03-01 | James Industries Co. | Lens pattern blank |
| 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 |
| US5050310A (en) * | 1989-10-13 | 1991-09-24 | Jiles Stephen L | Plastic-pipe ovality gauge |
-
1995
- 1995-05-24 FR FR9506239A patent/FR2734505B1/fr not_active Expired - Lifetime
-
1996
- 1996-04-24 US US08/637,102 patent/US5806198A/en not_active Expired - Lifetime
- 1996-05-22 ES ES96401105T patent/ES2128823T3/es not_active Expired - Lifetime
- 1996-05-22 EP EP96401105A patent/EP0744246B1/fr not_active Expired - Lifetime
- 1996-05-22 DE DE69601748T patent/DE69601748T2/de not_active Expired - Lifetime
- 1996-05-24 JP JP12975496A patent/JP3872132B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2128823T3 (es) | 1999-05-16 |
| DE69601748D1 (de) | 1999-04-22 |
| JP3872132B2 (ja) | 2007-01-24 |
| FR2734505B1 (fr) | 1997-08-01 |
| JPH08318458A (ja) | 1996-12-03 |
| EP0744246A1 (fr) | 1996-11-27 |
| US5806198A (en) | 1998-09-15 |
| FR2734505A1 (fr) | 1996-11-29 |
| DE69601748T2 (de) | 1999-12-30 |
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