EP1037727A1 - Machine d'usinage de bord de verre de lunettes - Google Patents

Machine d'usinage de bord de verre de lunettes

Info

Publication number
EP1037727A1
EP1037727A1 EP98948904A EP98948904A EP1037727A1 EP 1037727 A1 EP1037727 A1 EP 1037727A1 EP 98948904 A EP98948904 A EP 98948904A EP 98948904 A EP98948904 A EP 98948904A EP 1037727 A1 EP1037727 A1 EP 1037727A1
Authority
EP
European Patent Office
Prior art keywords
raw glass
tool
spectacle lens
attaching
processing
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
EP98948904A
Other languages
German (de)
English (en)
Other versions
EP1037727B1 (fr
Inventor
Lutz Gottschald
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.)
Wernicke and Co GmbH
Original Assignee
Wernicke and Co GmbH
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 Wernicke and Co GmbH filed Critical Wernicke and Co GmbH
Publication of EP1037727A1 publication Critical patent/EP1037727A1/fr
Application granted granted Critical
Publication of EP1037727B1 publication Critical patent/EP1037727B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • B24B17/00—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/02—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only
    • B24B17/025—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only for grinding rotating workpieces (three dimensional)
    • B24B17/026—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only for grinding rotating workpieces (three dimensional) for the periphery of plane workpieces, e.g. cams, lenses
    • 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

Definitions

  • the invention relates to a
  • Spectacle lens edge processing machine with a spectacle lens holder for a raw glass and a processing device for shaping the raw glass and for attaching a roof facet or a circumferential groove or grooves for fastening a spectacle frame by means of clamps or bores and, if necessary, for polishing the machined surfaces.
  • German patent 38 04 133 describes a method and a device for shaping a spectacle lens, starting from a raw lens, in which the area between the periphery of the raw lens and the periphery of the shape-treated spectacle lens is removed by using a separating tool to make a separating cut radially from the circumference of the rotating raw glass against the circumference of the finished glass, then along or parallel to this circumference and then radially back to the circumference of the raw glass, the spectacle lens clamped between two half-waves having a plurality of spaced-apart radial cut sections and one each is provided between the circumferential separating cut section and a regrinding takes place over the entire circumference of the cut glass at an angular distance from the separating cut section and while the respective separating cut sections are being produced.
  • the radial separation cut and circumferential cut sections can be carried out by means of a bearing beam, while the regrinding is carried out over the entire circumference of the cut-out glass by means of a conventional grinding wheel with a relatively large diameter, parallel to the axis of the raw glass.
  • This grinding wheel is designed as a facet grinding wheel since only relatively little material has to be removed. Accordingly, in this known method there is a device for exporting the radial and circumferential separating cuts and in addition a facet grinding wheel of the usual type is required. The one working according to this procedure
  • Spectacle lens edge processing machine therefore corresponds to a conventional spectacle lens edge processing machine with only one facet grinding wheel, which additionally requires a device for executing the radial separating cut sections and the peripheral separating cut sections.
  • the edge processing machine for shaping the raw glass which is held and set in rotation by two coaxial half-shafts and rotated, is carried out by means of a pre-grinding and finishing grinding wheel for grinding the spectacle lens contour and with a groove for grinding a roof facet, which is arranged parallel to the half-shafts and relative to them is radially and axially movable.
  • a machining tool is arranged on a bearing for a driven shaft of the roughing and finishing grinding wheel, which is used to produce a groove on the periphery of the spectacle lens and / or to chamfer the edges of the periphery of the spectacle lens.
  • This additional tool can consist of a milling or grinding tool arranged with its axis of rotation radially to the spectacle lens, which is driven at high speed by its own drive motor.
  • German patent 40 09 942 describes a method for machining the edge of spectacle lenses thermoplastic or a plastic consisting of a mixture of a thermoplastic or a thermosetting plastic is described, in which the edge of the lens is first subjected to a dry roughing and then a dry finishing, after which m a further operation to finish the surface of the lens by means of calibrating the liquid grinding wheel is carried out.
  • the invention addresses the problem of avoiding their disadvantages and improving them so that all the operations required on a lens made of silicate glass or plastic can be carried out easily, with a reduction in the size of the machine and a low noise level.
  • a lens processing machine which, according to the invention, has a spectacle lens holder for raw glass held at least on one side and a fiber milling cutter driven only at high speed, or a correspondingly shaped grinding tool or a laser beam as the only processing tool, with a small-format processing device for complete shaping of the raw glass by means of a separating cut, for attaching a roof facet and a circumferential groove or of grooves for attaching an eyeglass frame by means of clamps or bores and optionally for polishing and / or chamfering the machined surfaces in the case of plastic lenses.
  • a lens processing machine which according to the invention has a spectacle lens holder for raw glass held at least on one side and a small-sized processing device with one high-speed Driven Fmgerfraser or a correspondingly shaped grinding tool or a laser beam existing processing tool for complete shaping of the raw glass by a cut parallel to the raw glass axis and for making grooves for attaching an eyeglass frame by means of clips or holes and at least one other similar processing tool on the processing device for attaching a roof facet or a U groove and possibly for polishing and / or chamfering the machined surfaces in the case of plastic lenses.
  • the invention is based on the consideration that a combination of additional tools with conventional grinding wheels offers no possibility that
  • the invention measures
  • Processing device a complete shaping of the raw glass by a cut through, so that regrinding using a conventional grinding wheel for final shaping and for attaching a roof facet or a circumferential groove is no longer necessary.
  • This processing device is also suitable for attaching a roof facet or grooves for fastening an eyeglass frame by means of clamps or bores and polishing the machined surfaces of plastic lenses according to the method described in DE-PS 40 09 942.
  • a CNC control is preferably provided for the sequence of the required relative movements between the processing device and the raw glass, in order to be able to carry out the complete shaping work automatically with high precision and without great demands on the skill of the operator.
  • This CNC control can also be used to adjust the feed speed during machining in accordance with the circumferential contour of the selected spectacle lens as a function of the current radius and / or to change the lens thickness, specifically in the sense that the feed is reduced with a large radius and / or large lens thickness and increased with a small radius and / or small lens thickness.
  • Processing device can be designed differently. So z. B. the separating cut, attaching an Kaiser facet or grooves for attaching an eyeglass frame by means of clamps or holes by means of a laser beam. However, a mechanical tool is more suitable for producing a circumferential groove.
  • High-speed milling cutters or appropriately shaped grinding tools are preferably used as processing tools, the drives of which can consist of an air turbine, a water turbine, a combined air and water turbine or a high-frequency electric motor, it being possible for the processing device to be parallel with a tool for complete mold processing to the raw glass axis and at least one further tool for performing the further processing steps.
  • the processing device preferably has only one tool for carrying out all processing steps.
  • a particularly advantageous embodiment of the invention results when a finger mill or a correspondingly shaped grinding tool with its high-speed drive is arranged radially and axially adjustable relative to the raw glass axis and is adjustable in angle on a carrier. If the holder for the raw glass is designed as a rotatable shaft and the finger mill or the correspondingly shaped grinding tool can be adjusted with its drive between a position parallel to the raw glass axis and a position perpendicular to the raw glass axis at different angles, all the processing steps can be done with just one carry out a tool quickly and with little effort.
  • a snow-running drive motor when it is designed as an air turbine, a water turbine, a combined air and water turbine or as a high-frequency electric motor, has only a very small volume and the machining forces on the workpiece are low, only small clamping forces are required for the raw glass, so that it can be sufficient to hold the raw glass on one suction cup on the holding shaft by vacuum, which reduces the construction costs and the space required
  • B ⁇ llenglas edging machines are significantly reduced.
  • High-speed machining tools have a low noise level during machining and are easy to encapsulate due to their small dimensions.
  • the processing tool for shaping the raw glass is first arranged parallel to the rotary axis of the raw glass and moves radially with respect to the axis of rotation according to the shape of the spectacle lens to be produced, which is entered by the CNC control of the raw lens and also axially to follow the space curve of the lens to be processed.
  • the carrier for the machining tool is then rotated from the axially parallel position m to a radially directed position in order to attach a roof facet, a circumferential groove or grooves for fastening an eyeglass frame by means of clips.
  • the processing tool can also be used as a drill.
  • this can be designed as a combined processing tool and has an essentially cylindrical area for complete shaping of the raw glass by one Separating cut, for making grooves for attaching an eyeglass frame by means of clips or holes. Furthermore, a coaxial apex part for attaching a roof facet is provided axially offset and finally a likewise axially offset disc-shaped part for attaching a circumferential groove.
  • This combined processing tool with its drive arranged on a support, only needs to be radially and axially adjustable relative to the raw glass axis, but does not need to be adjustable at angles.
  • the drive for the milling cutter or the grinding tool runs at a speed of 60,000 to 360,000 mm to ⁇ i, so that the resolutionsgerausche unhorbaren are in the ultrasonic range.
  • Fig. 1 is a schematic plan view of an inventive
  • Lens processing machine with an axis parallel to the raw glass axis, radial to it and angle-adjustable processing device,
  • Fig. 2 is a view of a raw glass during the
  • Fig. 5 the attachment of a circumferential groove
  • Fig. 6 shows a combined processing tool on a radially and axially movable, but not adjustable adjustable carrier.
  • a base plate 1 is shown, on which a bearing block 2 with a rotary drive, not shown, for a spectacle lens holding shaft 3 mounted in the bearing block 2 is arranged.
  • An essentially circular raw glass 13 is fastened to the spectacle lens holding shaft 3 by means of a suction device 4.
  • the spectacle lens holding shaft 3 is hollow and connected to a vacuum pump 16 via a vacuum hose 15.
  • guides 6 are arranged for a carriage 7, which can be moved on the guides 6 parallel to the axis 14 of the raw lens 13 and the spectacle lens holding shaft 3.
  • This carriage 7 is also provided with guides 8 which are arranged perpendicular to the guides 6.
  • a slide 9 slides on these guides, holding a carrier 10 with a rotary drive (not shown in detail) for a spindle 11 mounted therein.
  • This carrier 10 is adjustable in angle about a vertical axis 29.
  • a finger cutter or a correspondingly shaped grinding pin 12 is arranged on the spindle 11.
  • a CNC control 17 which is connected to the rotary drive for the spectacle lens holding shaft 3, a displacement drive (not shown) for the slide 7, a further displacement drive (also not shown) for the slide 9, the angle adjustment drive (not shown) for the carrier 10 and to the vacuum pump 16 , All movements of the machining tool 12 for shaping the raw glass 13, for attaching a roof facet 18, 20 or a circumferential groove 25 or for attaching grooves for fastening an eyeglass frame can be controlled by means of clips or holes in the eyeglass lens.
  • the finger cutter in the case of a plastic glass or the grinding pin 12 in the case of a silicate glass is first removed from the 1 shown position against the circumference of the raw glass 13 and moved radially until the desired spectacle lens contour is reached in the direction of the raw glass axis 14.
  • the raw lens does not initially rotate until the radial distance corresponding to the spectacle lens 22 to be shaped is reached.
  • the raw glass 13 is slowly rotated, so that a cutting cut 23 is made along the circumferential contour of the desired spectacle lens 22 to be machined by the finger cutter or the grinding pin 12.
  • the finger mill or the grinding pin 12 is again guided radially outward, so that a shard 24 falls off. Then the fiber milling cutter or grinding pin 12 is returned radially to the lens contour and the separating cut is continued along the desired circumferential contour, so that after a full rotation of the raw glass 13 another shard 24 drops when the first radial separating cut is reached.
  • the carriage 9 is moved radially outward and the carrier 10, as shown in FIG. 3, is brought into an angular position which corresponds to the angle of a first side 18 of a roof facet.
  • the slide 9 with the carrier is moved radially according to the circumferential contour of the machined spectacle lens 22 and the carriage 7 axially according to the circumferential contour of the first side 18 of the roof facet, and thereby a cylindrical region 19 on the circumference of the machined spectacle lens 2 and the first part 18 of FIG Roof facet generated.
  • the slide 9 with the carrier 10 is brought into the position shown in FIG. 4 and the machining process proceeds in the reverse axial direction, as described with reference to FIG. 3.
  • the finger cutter or the grinding pin 12 can also be used for the outer peripheral edge of the cylindrical regions 19, 21 chamfer to eliminate any sharpness that occurs there.
  • FIG. 5 shows how a circumferential groove 25 can be produced in the shape-ground spectacle lens 22 by means of the same finger cutter or grinding pin 12 m in a position exactly perpendicular to the axis of rotation 14 of the raw lens.
  • This combined machining tool has on a spindle 11 a disk-shaped part 28 for attaching a circumferential groove according to FIG. 5, an apex part 27 for attaching a roof facet 18, 20 and a cylindrical region 26 which is designed like the finger cutter or grinding pin 12 for carrying out the Separating cuts on.
  • the carrier 10 with the rotary drive need not be adjustable in this case, but it is sufficient to move it with the slides 7 and 9 parallel to the raw glass axis 14 and perpendicularly thereto.
  • control is simplified since it is not necessary to adjust the angle, but the processing tool is more complicated and possibly less resistant, since it necessarily has to protrude freely from the spindle 11 over a longer length.
  • the feed control m can also be controlled by means of the CNC control 17 as a function of the instantaneous radius of the peripheral contour of the selected spectacle lens and / or the thickness of the spectacle lens, namely in the sense that the feed reduces with a large radius and / or large lens thickness and with a small radius and / or small glass thickness is increased.
  • the invention also includes an embodiment, not shown, with a tool for shaping the raw glass by means of a separating cut, for making grooves for fastening an eyeglass frame by means of clips or of bores and with another tool for attaching a roof facet or a circumferential groove, which can be arranged independently of one another on corresponding guides and are actuated in succession by the CNC controller 17.
  • a suitable laser beam can be used to make the separating cuts and to produce grooves for fastening an eyeglass frame by means of clamps or bores and an Kaiser facet, while the roof facet shown in FIGS. 3 and 4 and the circumferential groove shown in FIG. 5 by mechanical processing by means of Finger cutters or grinding pencils can be produced.
  • What is important in the present invention is the use of a small-sized processing device, as a result of which the lens-processing machine can be encapsulated well with a small size and has a low noise level.
  • Machining tools 12, 26, 27, 28 an air turbine, a water turbine, a combined air-water turbine or a high-frequency electric motor, which rotate with 60,000 to 360,000 mm ⁇ l and due to this high rotational speed and the small dimensions of the processing tools only small forces exercise the workpiece. Very low clamping forces are therefore required for the workpiece, which is why the one-sided clamping shown in FIG. 1 is possible by means of the suction device 4.

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)

Abstract

L'invention concerne une machine d'usinage de bord de verre de lunettes, comportant un support de verre de lunettes pour un verre brut maintenu d'au moins un côté, et un dispositif d'usinage pour façonner complètement le verre brut par une coupure de séparation, pour réaliser une facette supérieure ou une rainure périphérique, ou bien des rainures servant à fixer une monture de lunettes au moyen de pinces ou de trous, ainsi qu'éventuellement pour polir les surfaces usinées.
EP98948904A 1997-09-04 1998-09-03 Machine d'usinage de bord de verre de lunettes Expired - Lifetime EP1037727B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19738668A DE19738668A1 (de) 1997-09-04 1997-09-04 Brillenglasrandbearbeitungsmaschine
DE19738668 1997-09-04
PCT/EP1998/005596 WO1999011429A1 (fr) 1997-09-04 1998-09-03 Machine d'usinage de bord de verre de lunettes

Publications (2)

Publication Number Publication Date
EP1037727A1 true EP1037727A1 (fr) 2000-09-27
EP1037727B1 EP1037727B1 (fr) 2003-04-02

Family

ID=7841179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98948904A Expired - Lifetime EP1037727B1 (fr) 1997-09-04 1998-09-03 Machine d'usinage de bord de verre de lunettes

Country Status (3)

Country Link
EP (1) EP1037727B1 (fr)
DE (2) DE19738668A1 (fr)
WO (1) WO1999011429A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105408060A (zh) * 2013-07-26 2016-03-16 埃西勒国际通用光学公司 用于蚀刻光学镜片的方法和机器

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3961196B2 (ja) 2000-06-15 2007-08-22 株式会社ニデック 眼鏡レンズ加工装置
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
US7111372B2 (en) 2001-11-26 2006-09-26 Opti-Clip Ltd. Computer-controlled milling machine for producing lenses for clip-on accessory
US6763600B2 (en) 2001-11-26 2004-07-20 Opti-Clip International Llc Apparatus for orienting eyeglasses for scanning by electronic scanner
US6830333B2 (en) 2001-11-26 2004-12-14 Opti-Clip International Llc Computerized process serving for the manufacture of clip-ons for eyeglasses
JP4873878B2 (ja) * 2005-03-31 2012-02-08 株式会社ニデック 眼鏡レンズ周縁加工装置
FR2889468B1 (fr) * 2005-08-08 2008-10-17 Essilor Int Procede et dispositif de chargement ou dechargement d'outil de percage sur un mandrin d'un dispositif de detourage et de percage de lentilles ophtalmiques
FR2892041A1 (fr) * 2005-10-14 2007-04-20 Fwd Sarl Dispositif d'usinage de gabarits pour la fabrication de verres de lunettes
FR2900853B1 (fr) * 2006-05-10 2009-01-23 Essilor Int Procede et dispositif de detourage d'une lentille glissante par decoupage de ladite lentille
FR2900854B1 (fr) 2006-05-10 2009-07-17 Essilor Int Procede et dispositif de detourage d'une lentille par decoupage de ladite lentille
DE102010010338A1 (de) 2010-03-04 2011-09-08 Schneider Gmbh & Co. Kg Autokalibrierung
DE102012206473A1 (de) 2012-04-19 2013-10-24 WZR ceramic solutions GmbH Polierverfahren
FR2990369B1 (fr) * 2012-05-09 2014-08-29 Essilor Int Procede de detourage d'une lentille ophtalmique multicouche
DE102021004831A1 (de) 2021-09-24 2023-03-30 Satisloh Ag Verfahren zur spanenden bearbeitung von optischen werkstücken, insbesondere brillenlinsen aus kunststoff
CN114571359A (zh) * 2022-03-01 2022-06-03 维达力实业（赤壁）有限公司 用于玻璃孔加工的磨头装置

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DE3804133A1 (de) * 1988-02-11 1989-08-17 Wernicke & Co Gmbh Verfahren und einrichtung zur formgebung eines brillenglases
US5165202A (en) * 1991-10-18 1992-11-24 Spindel Jr Gilbert D Methods and apparatus for making spectacle frame lens patterns
US5363597A (en) * 1992-04-14 1994-11-15 Wernicke & Co. Gmbh Eyelgass lens edging machine
DE4308800C2 (de) * 1992-04-14 1994-08-18 Wernicke & Co Gmbh Brillenglasrandbearbeitungsmaschine
IT1282136B1 (it) * 1996-04-26 1998-03-12 Leader Snc Di S Cattai & C Macchina automatica per la fresatura e la bisellatura di lenti, vantaggiosamente di lenti per occhiali

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105408060A (zh) * 2013-07-26 2016-03-16 埃西勒国际通用光学公司 用于蚀刻光学镜片的方法和机器

Also Published As

Publication number Publication date
DE59807770D1 (de) 2003-05-08
DE19738668A1 (de) 1999-03-18
EP1037727B1 (fr) 2003-04-02
WO1999011429A1 (fr) 1999-03-11

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