EP0820837A1 - Maschine zum Schleifen optischer Gläser - Google Patents

Maschine zum Schleifen optischer Gläser Download PDF

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Publication number
EP0820837A1
EP0820837A1 EP97401591A EP97401591A EP0820837A1 EP 0820837 A1 EP0820837 A1 EP 0820837A1 EP 97401591 A EP97401591 A EP 97401591A EP 97401591 A EP97401591 A EP 97401591A EP 0820837 A1 EP0820837 A1 EP 0820837A1
Authority
EP
European Patent Office
Prior art keywords
machine according
additional
wheel
grinding wheel
blank
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
EP97401591A
Other languages
English (en)
French (fr)
Other versions
EP0820837B1 (de
Inventor
Raynald Marcel Gaston Longuet
Jean-Jacques Bernard Joseph Videcoq
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.)
Briot International SA
Original Assignee
Briot International 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
Priority claimed from FR9609171A external-priority patent/FR2751255B1/fr
Application filed by Briot International SA filed Critical Briot International SA
Publication of EP0820837A1 publication Critical patent/EP0820837A1/de
Application granted granted Critical
Publication of EP0820837B1 publication Critical patent/EP0820837B1/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
    • B24B9/146—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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/03—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding grooves in glass workpieces, e.g. decorative grooves
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • 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 to a optical lens grinding machine, of the type described in the preamble of claim 1.
  • the invention aims to integrate on a grinding machine one and / or the other of the operations abovementioned bevelling and creasing so economical and efficient.
  • the subject of the invention is a grinding machine of the aforementioned type, characterized by the characterizing part of claim 1.
  • the machine according to the invention may include one or more of the characteristics described in the claims 2 to 15.
  • the grinding machine shown in the Figures 1 to 3 is intended to make an optical glass beveled and counter-beveled from a blank generally circular. It basically includes a frame 1 in which two shafts are rotatably mounted parallel, namely a grinding wheel shaft 2 of axis X-X and an arm-shaft 3 of axis X'-X '.
  • the X-X and X'-X 'axes are horizontal.
  • a carriage 5 is also mounted sliding on the frame 1 parallel to the two shafts. This carriage is also mounted tilting on the frame and, for this purpose, it is articulated by a longitudinal edge around a tree 6 parallel to trees 2 and 3.
  • the carriage 5 door along its other longitudinal edge, two half-shafts 7 adapted to grip the blank, which is shown ground in 8 in Figure 2.
  • the machine also includes an additional 9 diamond sintered metal mounted freely rotatable at the end of an arm 10 fixed on the shaft 3. The tilting of arm 10 is controlled by a mechanism 11 of the type crank rod.
  • the machine also has a unit of electronic control 12 with programming keyboard, shown schematically in Figure 1. This unit is suitable for carry out the commands which will be described later in order to perform a fully automated machining cycle optical glass.
  • the grinding wheel shaft 2 is driven in rotation around the X-X axis by an electric motor not visible in the drawings, via a transmission belt 13.
  • Several juxtaposed grinding stones are placed on this tree forming a main train of grinders T, one of which grinding wheel 14A for roughing mineral glasses, a grinding wheel 14B for roughing synthetic glasses, a grinding wheel 15 finishing (ice grinding or beveling) and a grinding wheel 16 polishing.
  • the grinding wheel 16 has the same profile as the wheel 15, but with a finer grain. Between these two last grinding wheels is wedged a friction disc 17 having a cylindrical peripheral surface constituted by a plastic or elastomer coating.
  • Stacking 14A, 14B, 15, 16 is fixed in place by means of members 18 screwed at the end of the shaft.
  • the arm 10 forms a crank whose crankpin 19 has a Y-Y axis parallel to the X-X axes and X'-X 'and carries the grinding wheel 9, freely rotating, to its free end.
  • This grinding wheel 9, of diameter much less than that of the wheels 14A to 16, externally present ( Figure 4) a cylindrical central surface 20 framed by two frustoconical surfaces which converge away of this surface 20. It is a surface 21 having a relatively small apex half angle, by example of the order of 45 °, and of an opposite surface 22 having a relatively large apex half angle, by example 60 °.
  • the axial position of the following grinding wheel 9 the Y-Y axis is adjustable and can be locked using a radial screw 23.
  • the adjustment is such that the plane median of the cylindrical surface 20 of the grinding wheel 9 located in the vicinity of that of the friction disc 17.
  • the mechanism 11 comprises a disc 24 with an axis vertical, motorized, on the periphery of which is articulated by a ball 25 a connecting rod 26 of adjustable length. AT its other end, the connecting rod 26 is connected via a second ball joint 27 at the end of a crank 28, which is wedged on the shaft 3.
  • a switch limit switch 29 cooperating with the periphery of the disc 24, as well as a helical tension spring 30 which constantly requests the crank 28, and therefore the arm 10, in the direction of the X-X axis.
  • the electronic control unit 12 contains in memory the data relating to the spectacle frame to equip and the patient's morphology. From these data, it controls the translation and the position angle of carriage 5 as a function of position angular of the blank 8 on the half-shafts 7, during grinding, finishing / polishing and roughing the blank, as described below.
  • the arm 10 is tilted outward relative to the grinding wheel train T and completely clears the space above these grindstones.
  • the blank is wedged between the half-shafts 7 by a suitably centered adapter, then is brought successively on the grinding wheels 14A or 14B, 15 and possibly 16.
  • the blank then has its final outline and has on its edge a bevel 31 visible on the Figure 4.
  • the unit 12 causes the disc 24 to rotate and, as a result, the tilting of the arm 10 towards the axis X-X.
  • This movement brings the cylindrical surface 20 of the grinding wheel 9 in contact with the disc 17, so that this grinding wheel is driven to high speed rotating around its Y-Y axis, which is parallel to axes X-X and X'-X '.
  • the translation of the carriage 4 and the inclination of the stem 5 are controlled so as to bring an edge of the contour of the blank on the frustoconical surface 21 of the grinding wheel 9 for at least one turn of the blank on itself, then to bring the other edge of the outline of the blank onto the other frustoconical surface 22.
  • the two glass bevels are produced without moving roughing, without additional equipment and without operator intervention other than programming of this operation on the control keyboard of the machine.
  • Figure 4 also shows a variant possible from the machine, according to which the hub 32 of the grinding wheel 9, which is rotatably mounted in the crankpin 19 of the arm 10 by means of a bearing 33, extends beyond of the grinding wheel 9. On this extension is wedged a disc of creasing 34, of diameter significantly smaller than that from the grinding wheel 9, kept at a predetermined distance of the latter by a spacer 35, the assembly being fixed in position by an end screw 36.
  • the grinding wheel 9 can be modified to also form a grinding wheel creasing.
  • the translation of the carriage 4 is controlled, during the creasing operation, so as to position the groove 38 as desired on the edge of the glass, for example at e / 3 of the front face, where e denotes the thickness of the edge of the glass.
  • the grinding wheel 9 is equipped with the projection 37, provision is made in the friction disc 17 a groove 39 adapted for receive this projection, as shown.
  • the arm 10 is equipped with a freely rotating triple assembly counter-beveling, creasing and drilling function.
  • the end of the arm 10 carries a male crank pin 40 on which a sleeve 41 is mounted rotation by means of two bearings 42 and 43.
  • the end of this sleeve opposite the arm 10 has a countersink outside on which a creasing ring 44 is threaded, held by a ring 45.
  • the sleeve 41 is extended by a shaft end 46 on which is threaded the grinding wheel 9 against beveling.
  • a nut 47 screwed onto the threaded end of the end shaft 46, axially presses the assembly consisting of the grinding wheel 9, the ring 45 and the ring 44.
  • a drill bit 48 is introduced into an axial channel of the shaft end 46 and fixed in place by a radial screw 49.
  • the blank 8 can be brought into position chosen creasing. Two different positions are illustrated in FIG. 6, one 8A in solid lines, the other 8B in phantom.
  • the blank 8 can also be bevelled as previously described, or even breakthrough. For this, it is brought before wick 48, in the desired angular position, as shown in phantom in 8C, then the carriage is moved to the drill bit and the blank is perforated therewith. The displacement of carriage ends when wick has slightly emerged of the blank, the latter then being in the position 8D shown in phantom.
  • the wick 48 is preferably a cutting end cutter and on its flanks. We can then, after drilling a hole, move the blank in its general plane to realize the oblong light.
  • unit 12 contains in memory a series of predetermined trajectories and chooses, among these, a trajectory that fits between the two traces noted by the probes, as described in FR-A-2 499 442.
  • control of the carriage can result from a calculation law, applied to the two plots noted.
  • creasing can be carried out at e / 3 from the front face, where e denotes the thickness of the glass at its periphery.
  • the positioning of the carriage and its stroke, for the drilling operation can be determined from the probing of the two sides of the blank in its angular position of drilling, and a pre-established calculation law.
  • Such contact can be obtained, in a manner known per se in machine tools with numerical control, by a procedure called "offset" zero ", that is to say learning the carriage vis-à-vis an adjustment template.
  • Figure 7 schematically shows, from similar to Figure 1, a two-way arrangement probes suitable for implementing the variant of the Figure 6.
  • each lever articulated on two vertical axes parallel 51 secured to the machine frame.
  • each lever carries a caster 52, also with vertical axis, forming a feeler.
  • the other end of each arm is biased by a spring 53, via a cable 54, in the direction which separates the two feelers of each other. This movement is limited by the coming from a vertical pin 55 carried by each arm in abutment against a control plate 56.
  • the plate 56 carries a horizontal threaded rod 57 actuated by a gear motor. In the illustrated extension position of the rod 57, the plate 56 maintains the two feelers in the position of maximum separation.
  • the rod 57 is retracted (arrow f 1), the arms 50 are released, so that the springs 53 bring the two feelers closer to one another (arrows f 2), until contact with the blank 8 previously positioned axially and angularly in a predetermined manner.
  • the angular displacement of the two arms 50 thus provides, via the unit 12, the thickness e of the blank at the location of the drilling to be made.

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)
EP97401591A 1996-07-22 1997-07-03 Maschine zum Schleifen optischer Gläser Expired - Lifetime EP0820837B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9609171 1996-07-22
FR9609171A FR2751255B1 (fr) 1996-07-22 1996-07-22 Machine de meulage de verres optiques
FR9706126A FR2751256B1 (fr) 1996-07-22 1997-05-20 Machine de meulage de verres optiques
FR9706126 1997-05-20

Publications (2)

Publication Number Publication Date
EP0820837A1 true EP0820837A1 (de) 1998-01-28
EP0820837B1 EP0820837B1 (de) 2000-02-02

Family

ID=26232852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401591A Expired - Lifetime EP0820837B1 (de) 1996-07-22 1997-07-03 Maschine zum Schleifen optischer Gläser

Country Status (5)

Country Link
US (1) US5882247A (de)
EP (1) EP0820837B1 (de)
DE (1) DE69701244T2 (de)
ES (1) ES2142138T3 (de)
FR (1) FR2751256B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19834748A1 (de) * 1998-08-01 2000-02-10 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
EP1616663A1 (de) 2001-03-22 2006-01-18 Satisloh GmbH Vorrichtung zur Randbearbeitung von optischen Linsen
EP1710046A2 (de) * 2005-04-04 2006-10-11 Buchmann Deutschland GmbH Brillenglasrandbearbeitungsmaschine
US7308745B2 (en) 2002-11-25 2007-12-18 Satisloh Gmbh Method and device for edge-machining of a plastic optical lens and a combination tool therefor

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19804428A1 (de) * 1998-02-05 1999-08-19 Wernicke & Co Gmbh Verfahren zum Markieren oder Bohren von Löchern in Brillengläsern und Vorrichtung zur Durchführung des Verfahrens
AU2004210580B2 (en) * 1999-08-06 2007-03-08 Hoya Corporation Lens processing device, lens processing method, and lens measuring method
ES2304353T3 (es) * 1999-08-06 2008-10-16 Hoya Corporation Dispositivo de fabricacion de lentes y metodo de fabricacion de lentes.
DE10013649A1 (de) * 2000-03-18 2001-09-27 Wernicke & Co Gmbh Zusatzschleifwerkzeug an einer Brillenglasrandschleifmaschine
JP3916445B2 (ja) 2001-11-08 2007-05-16 株式会社ニデック 眼鏡レンズ加工装置
FR2832947B1 (fr) * 2001-12-04 2004-03-19 Briot Int Machine de meulage de verres optiques
JP2003300136A (ja) * 2002-04-08 2003-10-21 Hoya Corp レンズ加工装置
US7090559B2 (en) * 2003-11-19 2006-08-15 Ait Industries Co. Ophthalmic lens manufacturing system
JP2008512266A (ja) * 2004-09-08 2008-04-24 ナショナル オプトロニクス インコーポレイテッド レンズにドリル作業する装置及びその方法
DE102009043678A1 (de) * 2009-10-01 2011-04-07 Kapp Gmbh Hartfeinbearbeitungsmaschine zum Hartfeinbearbeiten eines Werkstücks
DE102009043676A1 (de) * 2009-10-01 2011-07-07 KAPP GmbH, 96450 Hartfeinbearbeitungsmaschine zum Hartfeinbearbeiten eines Werkstücks
US9381618B2 (en) * 2013-04-25 2016-07-05 Saint-Gobain Abrasives, Inc. Grinding and polishing tool
CN109397008B (zh) * 2018-12-03 2023-11-07 厦门理工学院 一种新型镜片数控切割机及控制方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499442A1 (fr) * 1981-02-10 1982-08-13 Hoya Lens Corp Appareil de decoupe pour effectuer une gorge sur des verres de lunette
EP0350216A2 (de) * 1988-07-07 1990-01-10 Berkshire Ophthalmic Laboratories Limited Verfahren und Vorrichtung zum Schleifen von Linsen
FR2689794A1 (fr) * 1992-04-14 1993-10-15 Wernicke & Co Gmbh Machine à usiner le bord d'un verre de lunettes.
DE4214596A1 (de) * 1992-05-01 1993-11-04 Wernicke & Co Gmbh Polierscheibe mit nut
EP0589628A1 (de) * 1992-09-25 1994-03-30 Berkshire Ophthalmic Laboratories Limited Schleifvorrichtung
WO1996009914A1 (fr) * 1994-09-27 1996-04-04 Essilor International Procede et dispositif pour obvier a la fragilite des aretes d'un verre de lunettes en materiau rigide, et verre de lunettes correspondant

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1472282A (en) * 1973-04-25 1977-05-04 Hedelin L Eyeglass lens grinding wheel and a method of grinding eyeglass lenses
US4179851A (en) * 1978-01-24 1979-12-25 Coburn Optical Industries, Inc. Apparatus for edging ophthalmic lenses
US4870784A (en) * 1983-11-14 1989-10-03 Ait Industries, Inc. Lens edging machine and method
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
US5053971A (en) * 1989-08-30 1991-10-01 Gerber Optical, Inc. Method and apparatus for edging an optical lens
FR2691663B1 (fr) * 1992-05-26 1996-10-11 Essilor Int Procede de ravivage de meules, disque et machine pour sa mise en óoeuvre.
DE4320934C2 (de) * 1993-06-24 1995-04-20 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
DE19527222C2 (de) * 1995-07-26 1997-09-04 Wernicke & Co Gmbh Anlage zum Schleifen wenigstens des Umfangsrandes von Brillengläsern und Verfahren zum rechnerischen Berücksichtigen der Position eines an einem Haltekopf der Anlage gehaltenen Brillenglasrohlings

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499442A1 (fr) * 1981-02-10 1982-08-13 Hoya Lens Corp Appareil de decoupe pour effectuer une gorge sur des verres de lunette
EP0350216A2 (de) * 1988-07-07 1990-01-10 Berkshire Ophthalmic Laboratories Limited Verfahren und Vorrichtung zum Schleifen von Linsen
FR2689794A1 (fr) * 1992-04-14 1993-10-15 Wernicke & Co Gmbh Machine à usiner le bord d'un verre de lunettes.
DE4214596A1 (de) * 1992-05-01 1993-11-04 Wernicke & Co Gmbh Polierscheibe mit nut
EP0589628A1 (de) * 1992-09-25 1994-03-30 Berkshire Ophthalmic Laboratories Limited Schleifvorrichtung
WO1996009914A1 (fr) * 1994-09-27 1996-04-04 Essilor International Procede et dispositif pour obvier a la fragilite des aretes d'un verre de lunettes en materiau rigide, et verre de lunettes correspondant

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19834748A1 (de) * 1998-08-01 2000-02-10 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
WO2000007770A1 (de) 1998-08-01 2000-02-17 Wernicke & Co. Gmbh Brillenglasrandschleifmaschine
EP1100651B1 (de) * 1998-08-01 2002-04-03 Wernicke & Co. GmbH Brillenglasrandschleifmaschine
US7137871B2 (en) 1998-08-01 2006-11-21 Wernicke & Co. Gmbh Spectacle lens edging machine
US7338347B2 (en) 1998-08-01 2008-03-04 Wernicke & Co. Gmbh Spectacle-lens edging machine
EP1616663A1 (de) 2001-03-22 2006-01-18 Satisloh GmbH Vorrichtung zur Randbearbeitung von optischen Linsen
US7308745B2 (en) 2002-11-25 2007-12-18 Satisloh Gmbh Method and device for edge-machining of a plastic optical lens and a combination tool therefor
EP1710046A2 (de) * 2005-04-04 2006-10-11 Buchmann Deutschland GmbH Brillenglasrandbearbeitungsmaschine
DE102005015449B3 (de) * 2005-04-04 2006-11-16 Weco Optik Gmbh Brillenglasrandbearbeitungsmaschine
EP1710046A3 (de) * 2005-04-04 2006-11-29 Buchmann Deutschland GmbH Brillenglasrandbearbeitungsmaschine

Also Published As

Publication number Publication date
US5882247A (en) 1999-03-16
FR2751256B1 (fr) 1998-12-31
ES2142138T3 (es) 2000-04-01
FR2751256A1 (fr) 1998-01-23
DE69701244D1 (de) 2000-03-09
DE69701244T2 (de) 2000-07-13
EP0820837B1 (de) 2000-02-02

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