EP2293900A1 - Procédé pour l'usinage d'un palet de verre de lunettes et palet de verre de lunettes muni d'une matière de liaison et d'une molette de glantage - Google Patents

Procédé pour l'usinage d'un palet de verre de lunettes et palet de verre de lunettes muni d'une matière de liaison et d'une molette de glantage

Info

Publication number
EP2293900A1
EP2293900A1 EP09742138A EP09742138A EP2293900A1 EP 2293900 A1 EP2293900 A1 EP 2293900A1 EP 09742138 A EP09742138 A EP 09742138A EP 09742138 A EP09742138 A EP 09742138A EP 2293900 A1 EP2293900 A1 EP 2293900A1
Authority
EP
European Patent Office
Prior art keywords
lens blank
diameter
compound
blank
cavity
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
EP09742138A
Other languages
German (de)
English (en)
Other versions
EP2293900B1 (fr
Inventor
Gunter Schneider
Helwig Buchenauer
Klaus Krämer
Stephan Huttenhuis
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.)
Schneider GmbH and Co KG
Original Assignee
Schneider GmbH and Co KG
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 Schneider GmbH and Co KG filed Critical Schneider GmbH and Co KG
Publication of EP2293900A1 publication Critical patent/EP2293900A1/fr
Application granted granted Critical
Publication of EP2293900B1 publication Critical patent/EP2293900B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • 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

Definitions

  • the invention relates to a processing method for a spectacle lens blank, preferably made of plastic, in which a Blockstuck for holding and Unterstutzen the lens blank m of a processing machine by means of a connecting compound with a first side of the lens blank is connected, for this purpose between the Blockstuck and the first side at least a cavity is delimited with the use of a sealing or trimming agent, wherein the sealing or trimming agent has an inner diameter Dd, Ds and is preferably sealingly applied in the region of the inner diameter Dd, Ds against the first side, into which cavity the bonding compound is filled or into the compound already compound mass is provided and is then cured.
  • the bonding compound does not necessarily have to be filled or poured.
  • the bonding compound m pre-portioned in a slightly firmer form to be applied to the block piece and then the spectacle glass blank to be placed or printed on.
  • the spectacle lens blank is placed against the trimming agent for the purpose of determining its relative position to the block piece, and the compound compound is molded onto the spectacle lens blank or the first side.
  • the spectacle lens blank only then limits the cavity thus formed and already prefilled.
  • the cavity is only partially limited when using pre-portioned compound by the lens blank, the block stucco and the trimming agent. A sealing closure of the cavity is not necessary.
  • the Eyeglass blank is inserted into a milling and / or lathe or grinding machine via the block piece cast by means of the joining compound, the eyeglass blank on the first side being supported by the connecting mass via a diameter Dv corresponding to the diameter Dd, Ds.
  • the connecting mass via a diameter Dv corresponding to the diameter Dd, Ds.
  • a Blockstuck for spectacle lens blanks which has a coupling part and a holding part.
  • the holding part is conformable to the shape of Bril ⁇ lenglasrohlings.
  • the necessary holding power is by heating and pressing, if necessary with the addition of adhesive, achieved.
  • the associated with the pressing deformation of the lens blank is disadvantageous because they have a negative effect on the Geo ⁇ metry of the spectacle lens and the lens at the latest after blocking.
  • the invention has for its object to form a processing method for a lens blank and a B ⁇ llen- glass blank block stucco assembly such that optimal processing of the lens blank is guaranteed during processing.
  • the object is solved erfmdungsgeharm characterized that are processed in one of the following processing processes, the blank and the compound mass or machined or ge ⁇ ground. This ensures that the lens blank is nearly or completely supported by the Verbin ⁇ dung mass, since the original projection of the lens blank about the connection mass or de ⁇ ren edge is processed.
  • the diameter Dv of the connecting mass can be effected independently of the diameter Dr experienced by the lens during machining or to what diameter the lens must be reduced during machining.
  • the bonding compound the lens blank is supported as far or as wide as possible during the blocking, so that after reduction of the blank diameter Dr to the semifinished product diameter D1, almost 100% support of the semifinished product is already guaranteed.
  • the inner diameter Dd, Ds of the sealing or trimming agent is selected as a function of a diameter Dr of the lens blank such that the inner diameter Dd, Ds is between 1 mm and 20 mm, in particular between 2 mm and 6 mm mm is smaller than the diameter Dr of the lens blank.
  • a lens blank m usually has a very irregular circumferential surface, remains as a sealing surface for applying the sealant for the purpose of limiting the cavity for the compound mass only the first side of the lens blank.
  • the vorgefer ⁇ preferential first side of a precise reference surface.
  • a minimum bearing surface of the sealing means should be present on the first side, is provided with the aforementioned dimensions for the inner diameter Dd a broad support ensured the spectacle lens blank.
  • the prefabricated first side should be used as reference surface for the relative position. This is particularly true against the background that the lens blank, starting from its diameter Dr as explained below in a first - D ⁇
  • Processing step is reduced to a diameter Dl to eliminate the irregularities at the edge.
  • an edge of the lens blank is machined and the diameter Dr is reduced to a diameter D1, wherein for the diameter D1 the dimension of the diameter Dv or a dimension which is at most 1 mm to 6 mm is great, is provided.
  • the diameter Dl should be the dimension of the diameter Dv of the bonding mass.
  • this processing step it is also possible in this processing step to reduce both the lens blank and the bonding compound as set forth below to a diameter smaller than D1.
  • a second side of the lens blank opposite the first side is machined or ground, wherein before or after the machining of the second side the diameter Dr, Dv of the lens blank or the edge and a Be processed diameter of the compound or machined or ground.
  • the round shape of the lens blank or of the lens thus produced is generally independent of the shape of the lens to be produced Retain semi-finished product, wherein the diameter Dr is reduced as described above to a level Dl, which still ensures the production of the desired spectacle lens ⁇ tet.
  • the round shape of the semifinished product is usually retained for two reasons.
  • an interruption-free polishing operation can be ensured at the closing of ⁇ polishing process, in which the semi-finished product in the Re ⁇ gel also rotates, without that the polishing tool is subject to changing system conditions due to a rotating unbalanced semi-finished product in particular in the edge region.
  • irregularities in the coating occur in the edge region, which are processed by the final machining of the diameter of the round semi-finished product thus produced, ie the production of the desired non-circular or smaller spectacle lens shape.
  • the lens blank is not only reduced in diameter to a minimum during the cutting or chip process, but also obtains an oval or polygonal shape deviating from the round shape.
  • a protective layer is provided between the lens blank and the bonding compound.
  • the protective layer is usually applied in advance on the lens blank or is already provided on this, so that the prefabricated first page is not damaged.
  • the lens blank is so held indirectly over the protective layer of the bonding compound.
  • connection mass is introduced into the cavity via a plurality of inlet nozzles or via a plurality of outlet openings of one or more inlet nozzles.
  • the filler neck or the outlet openings have different directional components, so that the bonding compound is not only introduced at different positions of the respective filler neck, but is also introduced within a position of a filler neck m different directions or with different directional components.
  • the various positions of the filler neck are also accompanied by different directional components for the joining compound to be introduced.
  • the filling level of the bonding compound within the cavity is monitored by means of a laser distance sensor.
  • a laser distance sensor has the necessary focus in order to detect the fill level m of the filling opening from outside.
  • compound mass reflective additives can be provided which ensure the detection of the level by means of the laser distance sensor, especially with clear compound masses.
  • the compound compound can be applied to the block piece pre-portioned and then the lens blank can be placed on and / or printed, the compound compound being molded onto the lens blank. This sealing and pouring the compound is no longer necessary.
  • the connecting mass is After the molding has cured to the blank, so that the necessary holding force is developed.
  • the object is also achieved by a lens blank having a diameter Dr, which is attached via selectge cast compound to a Blockstuck, wherein the compound mass has an outer diameter Dv, and the diameter Dv is at most 2 mm to 6 mm, in particular at most 4 mm smaller than the diameter Dr.
  • the diameter Dv of the bonding compound is maximized for the purpose of maximum support of the blank, with a projection of the blank over the bonding compound for the purpose of conditioning the sealant or block ring is necessary.
  • a large part of the lens blank has a diameter Dr of 80 mm or 85 mm. If the diameter Dv is at least 65 mm to 90 mm, the support according to the invention is ensured.
  • the diameter Dv is about 2 mm smaller than the diameter Dr, so that the following values result for the diameter Dv as a function of the diameter Dr.
  • the value of the diameter Dv depends on the space required for the sealing or the installation of the sealant. In the above table, the space requirement is taken into account initially 1 mm and in the last line 2 mm. The corresponding difference between the diameters Dr and Dv thus amounts to 2 mm and 4 mm, respectively.
  • the block piece has an axial direction in relation to the central axis. Has bearing surface and for receiving in a chuck of the machine with the contact surface in the axial direction against the chuck to the plant can be brought. Thus, a precise clamping of the block stucco is ensured, whereby the processing is further optimized on the whole. This investment area was previously cast by means of bonding compound to the block stucco.
  • FIG. 1 is a sectional view of a block stucco with a lens blank placed in a block station;
  • FIG. 2 shows the lens blank with blocked block stucco
  • FIG. 3a shows a schematic diagram of the lens blank with sealing means and bonding compound
  • FIG. 3b shows a schematic diagram of the lens blank with a bonding agent and bonding compound
  • Figure 4a is a schematic diagram of the lens blank with sealant and filler neck
  • Figure 4b is a schematic diagram of the lens blank with sealant and other Emfullstutzentypen.
  • both the block stucco 2 and the spectacle glass blank 1 m are placed in a partially illustrated blocking mechanism 7.
  • the blocking machine 7 has a receiving dome 7.2, in which the block piece 2 is inserted.
  • the lens blank 1 is a Fuhrungskalotte 7.7 provided, which is mounted on a pivot plate 7.3 in the blocker machine 7.
  • the swivel plate 7.3 in addition to various other gear members also has a rotation axis 7.4. For later ejection of the block stump an ejector 7.6 is provided.
  • the spectacle lens blank 1 to be piled up is placed over the block piece 2, whereby in order to ensure a cavity 5 to be filled by bonding compound 3, a block ring formed as a sealing means 4 and the guide dome 7.7 are placed between the lens blank 1 and the block stucco 2 or the receiving dome 7.2.
  • the block ring 4 thus seals against the lens blank 1 or its first lower side 1.1 and against the guide dome 7.7.
  • the guide calotte 7.7 seals against the receiving dome 7.2, while the receiving dome 7.2 seals against the block piece 2.
  • an infill 4.1 is provided.
  • Einphilllo réelle 4.1 a cylindrical or oval Einfullstut zen 7.5 of the blocking machine 7 is arranged, via the liquid compound mass 3 m, the cavity 5 is filled.
  • the filler neck 7.5 is movable with respect to the direction of flow.
  • a distance between the filler neck 7.5 and the filling 4.1 is changeable for the purpose of improved introduction.
  • a laser distance sensor 9 is provided behind the filler neck 7.5, via which the level in the filling 4.1 is monitored.
  • a measuring beam 9.1 is introduced laterally and, during operation, runs approximately in a plane of the center axis of the inlet nozzle 7.5.
  • the blocking machine 7 a holder 7.1, which biases the lens blank 1 m in the axial direction against the sealant or the block ring 4.
  • the spectacle lens blank 1, the block stucco 2 and the block ring 4 with the filling opening 4.1 are employed in the blocking machine 7 with respect to the vertical m at an angle ⁇ of about 20 °.
  • the bonding compound 3 thus enters from the filler neck 7.5 through the filling opening 4.1 into the cavity 5 which is set at the angle ⁇ , whereby it is filled from bottom to top.
  • the connecting compound 3 has a diameter Dv which is slightly smaller than the diameter Dr of the lens blank 1.
  • the lens blank 1m is usually machined to a diameter D1 in a first processing step reduced, wherein the remaining difference between the diameter Dl and the diameter Dv of the connecting mass 3 erfmdungsge- measure should be as small as possible, so that the largest possible support of the lens blank 1 is ensured by the bonding compound 3.
  • the edge 1.3 and / or a second side 1.2 of the lens blank 1 and the bonding compound 3 are processed.
  • the Blockstuck 2 has a first recess 2.1, which it with a nose, not shown, a machine recording for the purpose of ensuring an orientation in operative connection can be brought.
  • a recess not shown, is provided which serves to transmit a torque.
  • the block stucco 2 an axial pawfla ⁇ che 2.2, which is provided adjacent to a cylindrical clamping surface 2.3.
  • the block 2 has a stucco more Hmterschneidung 2.4, which ensures a force acting in the axial Rich ⁇ tung positive fit connection between the bond Ver ⁇ mass 3 and the block stucco. 2
  • Em shown in Figure 2 chuck 8 a machine tool is thus in the radial direction against the cylindrical clamping surface 2.3 and in the axial direction against the axial stop surface 2.2 can be applied.
  • the relative position between the Blockstuck 2 and the chuck 8 is thus subject to no influences that are ⁇ lead back to the compound mass .
  • a trimming means 4 which has three support points 4a, 4b, 4c, against which the first side 1.1 of the lens blank 1 must be present for the purpose of determining the relative position.
  • the compound compound 3 is formed when placing or pressing the lens blank 1 and spreads radially outward.
  • the trimming means 4 has a corresponding diameter Ds, which is determined by the three support points 4a, 4b, 4c.
  • the effectively available Diameter Dv corresponds at least to the diameter Ds.
  • the effective diameter of the connecting mass 3 is even larger, but only over parts of the circumference. A steady support is given over the diameter Ds.
  • the filler neck 7.5 runs in contrast to that according to exemplary embodiment 1 V-shaped and has two Auslasso réelleen 7.51, 7.52, which m are arranged at an angle of about 30 ° to each other.
  • the outlet openings 7.51, 7.52 can be round or oval.
  • the inflowing compound mass 3 is delivered with different directional components, that is, both to the right and to the left side, so that a more uniform and faster distribution of the compound mass 3 within the cavity 5 is gewahrrent.
  • a further filler neck 7.5 ⁇ ⁇ is provided, via which additional or alternative (not shown) from below compound compound 3 can be introduced into the cavity 5.
  • the filler neck 7.5 ⁇ ⁇ is V-shaped as in the embodiment of Figure 1.
  • the outlet openings 7.51, 7.52 can be round or oval.
  • the centrally arranged filler neck 7.5 ⁇ is also V-shaped in this embodiment, so that the compound compound 3 is discharged via two outlet openings 7.53, 7.54 with different directional components.
  • the filler neck shown in the embodiments 4a, 4b 7.5, 7.5 ⁇ , 7.5 ⁇ ⁇ both the position and the execution, ie cylindrical or V-shaped, can be used in any combination.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Eyeglasses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

L'invention concerne un procédé d'usinage pour un palet de verre de lunettes (1) selon lequel une molette de glantage (2) pour le maintien et le support du palet de verre de lunettes (1) dans une machine d'usinage est reliée au moyen d'une matière de liaison (3) à une première face (1.1) du palet de verre de lunettes (1). A cet effet, une cavité (5) est délimitée entre la molette de glantage (2) et la première face (1.1) à l'aide d'un moyen d'étanchéité ou d'appui (4) au moins, le moyen d'étanchéité ou d'appui (4) présentant un diamètre interne Dd, Ds et étant appuyé de manière étanche contre la première face (1.1); la cavité (5) est remplie de matière de liaison (3) ou de la matière de liaison (3) est présente dans la cavité (5) puis la matière de liaison (3) est durcie; le palet de verre de lunettes (1) est inséré par le biais de la molette de glantage (2) fixée au moyen de la matière de liaison (3) dans une machine à fraiser et/ou un tour ou une polisseuse, le palet de verre de lunettes (1) étant soutenu sur la première face (1.1) par la matière de liaison (3) sur un diamètre Dv correspondant au diamètre Dd, Ds; le palet (1) et la matière de liaison (3) sont soumis à un enlèvement de matière lors de l'une des étapes d'usinage suivantes. L'invention concerne également un palet de verre de lunettes (1) de diamètre Dr qui est fixé sur une molette de glantage (2) par le biais d'une matière de liaison coulée (3), la matière de liaison (3) présentant un diamètre externe Dv. Le diamètre Dv est au maximum de 2 mm à 6 mm et, en particulier, au maximum de 4 mm inférieur au diamètre Dr.
EP09742138.2A 2008-05-07 2009-05-07 Procédé pour l'usinage d'un palet de verre de lunettes et palet de verre de lunettes muni d'une matière de liaison et d'une molette de glantage Active EP2293900B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008022660A DE102008022660A1 (de) 2008-05-07 2008-05-07 Verfahren zum Bearbeiten eines Brillenglasrohlings und Brillenglasrohling mit Verbindungsmasse und Blockstück
PCT/EP2009/055567 WO2009135920A1 (fr) 2008-05-07 2009-05-07 Procédé pour l'usinage d'un palet de verre de lunettes et palet de verre de lunettes muni d'une matière de liaison et d'une molette de glantage

Publications (2)

Publication Number Publication Date
EP2293900A1 true EP2293900A1 (fr) 2011-03-16
EP2293900B1 EP2293900B1 (fr) 2013-06-19

Family

ID=41056912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09742138.2A Active EP2293900B1 (fr) 2008-05-07 2009-05-07 Procédé pour l'usinage d'un palet de verre de lunettes et palet de verre de lunettes muni d'une matière de liaison et d'une molette de glantage

Country Status (7)

Country Link
US (1) US8684525B2 (fr)
EP (1) EP2293900B1 (fr)
CN (1) CN102015208B (fr)
BR (1) BRPI0908291A2 (fr)
DE (1) DE102008022660A1 (fr)
MX (1) MX2010012082A (fr)
WO (1) WO2009135920A1 (fr)

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Publication number Priority date Publication date Assignee Title
BR112013008209B1 (pt) 2010-10-04 2022-03-15 Schneider Gmbh & Co. Kg Dispositivo para trabalhar uma lente óptica, lente óptica e processo para trabalhar uma lente óptica
EP2455186A1 (fr) 2010-11-17 2012-05-23 Schneider GmbH & Co. KG Dispositif et procédé de traitement d'une lentille optique avec identification automatique de la lentille optique
EP2455187A1 (fr) 2010-11-23 2012-05-23 Schneider GmbH & Co. KG Dispositif et procédé de traitement d'une lentille optique
EP2455188B1 (fr) 2010-11-23 2019-11-20 Schneider GmbH & Co. KG Dispositif et procédé destinés à bloquer une lentille
US20130303060A1 (en) * 2010-11-26 2013-11-14 Schneider Gmbh & Co. Kg Block piece
FR2974529B1 (fr) * 2011-04-26 2013-06-14 Essilor Int Dispositif de glantage d'une lentille ophtalmique
JP5899978B2 (ja) * 2012-02-03 2016-04-06 株式会社ニデック 眼鏡レンズ加工装置
US9168628B2 (en) 2012-11-21 2015-10-27 Schneider GmbH & Co, KG Device for blocking a lens
CN105163904B (zh) * 2013-04-29 2018-02-09 埃西勒国际通用光学公司 封阻计算模块
EP3415273B1 (fr) * 2017-06-12 2024-01-24 Essilor International Dispositif de blocage par adhérence d'un élément optique semi-fini
EP3470172B1 (fr) * 2017-10-13 2020-09-16 Essilor International Procédé d'optimisation d'un matériau de support pour une opération de surfaçage d'une ébauche de lentille
CN113732368B (zh) * 2021-08-23 2022-10-11 芜湖智一金属制品有限公司 一种镜片铣床

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FR2733710B1 (fr) 1995-05-03 1997-07-18 Essilor Int Pre-molette pour le glantage d'une lentille optique, et son procede de mise en oeuvre
DE69621625T2 (de) 1995-09-18 2003-01-02 Minnesota Mining And Mfg. Co., Saint Paul Thermoplastisches linsenhaltematerial
JPH11198014A (ja) 1998-01-09 1999-07-27 Seiko Epson Corp プラスチックレンズの製造方法
FR2836409B1 (fr) 2002-02-26 2004-05-28 Essilor Int Procede pour la pose d'un bloc de prehension sur une ebauche semi-finie de lentille ophtalmique
DE10304388B4 (de) * 2003-02-03 2020-10-29 Schneider Gmbh & Co. Kg Zerspanbares Blockstück
DE102005038063A1 (de) 2005-08-10 2007-02-15 Schneider Gmbh + Co. Kg Vorgeformtes Blockstück mit drei Auflagepunkten
EP2011604B2 (fr) 2007-07-05 2020-12-09 Satisloh AG Procédé de blocage de lentille, composition adhésive et utilisation de cette dernière pour les blocage des lentilles
EP2105782A1 (fr) * 2008-03-25 2009-09-30 Wilhelm Anger Procédé et dispositif de traitement de verres de lunette revêtus

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Also Published As

Publication number Publication date
EP2293900B1 (fr) 2013-06-19
CN102015208B (zh) 2015-05-06
BRPI0908291A2 (pt) 2015-07-21
US8684525B2 (en) 2014-04-01
US20110096290A1 (en) 2011-04-28
CN102015208A (zh) 2011-04-13
DE102008022660A1 (de) 2009-11-12
WO2009135920A1 (fr) 2009-11-12
MX2010012082A (es) 2011-04-11

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