US20150093978A1 - Polishing film for plastic spectacle lenses - Google Patents

Polishing film for plastic spectacle lenses Download PDF

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Publication number
US20150093978A1
US20150093978A1 US14/396,237 US201314396237A US2015093978A1 US 20150093978 A1 US20150093978 A1 US 20150093978A1 US 201314396237 A US201314396237 A US 201314396237A US 2015093978 A1 US2015093978 A1 US 2015093978A1
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US
United States
Prior art keywords
polishing
peripheral
curvature
polishing film
spectacle lens
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.)
Abandoned
Application number
US14/396,237
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English (en)
Inventor
Gunter Schneider
Stephan Huttenhuis
Ferdinand Achenbach
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
Assigned to SCHNEIDER GMBH & CO. KG reassignment SCHNEIDER GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ACHENBACH, FERDINAND, HUTTENHUIS, STEPHAN, SCHNEIDER, GUNTER
Publication of US20150093978A1 publication Critical patent/US20150093978A1/en
Abandoned 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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0524—Plural cutting steps

Definitions

  • the invention pertains to a polishing film for a polishing head for plastic spectacle lenses for zone polishing of a front or rear side of the spectacle lens, with a polishing surface which can be positioned against the spectacle lens, being bounded by a peripheral surface, while an edge is formed between the polishing surface and the peripheral surface.
  • the invention pertains to a polishing film for a polishing head for plastic spectacle lenses for zone polishing of a front or rear side of the spectacle lens, with a polishing surface which can be positioned against the spectacle lens, the polishing surface having a peripheral surface with a width b of at most 0.1 D to 0.3 D or at most 0.2 D.
  • the invention also pertains to a method for producing a polishing film for a polishing head for plastic spectacle lenses for zone polishing of a front or rear side of the spectacle lens, with a polishing surface which can be positioned against the spectacle lens, being bounded by a peripheral surface, while an edge is provided between the polishing surface and the peripheral surface, wherein the polishing film at the start of the method is carved out from a web of material, such as punched out or cut out.
  • the invention furthermore pertains to a method for producing a polishing film for a polishing head for plastic spectacle lenses for zone polishing of a front or rear side of the spectacle lens, with a polishing surface which can be positioned against the spectacle lens, having a basic diameter D, wherein the polishing film in a first step is carved out from a web of material, such as punched out or cut out, and the polishing surface has a peripheral zone with a width b of at most 0.1 D to 0.3 D.
  • a polishing head with a polishing film is already known from DE 10 2005 010 583 A1.
  • the polishing film is arranged on a foam carrier body and has a convex basic curvature. In the radial direction, it projects above the foam carrier body. According to paragraph [0036], a gap is formed during the machining of a spectacle lens between the lens and the polishing film, serving as an annular reservoir of polishing agent.
  • a polishing head with a polishing film, a carrier layer, and a basic body is already known from DE 10 2007 026 841 A1.
  • the carrier layer of the basic body has a chamfer or recess at the outer circumference so that the polishing film after being glued fast to the carrier layer is set back in the axial direction on the outer circumference.
  • the problem of the invention is to configure and arrange a polishing film so that an improved polishing result is assured.
  • Polishing films also known as a polishing pad, are punched out or cut out from corresponding webs of material during the manufacture. In this process, a peripheral surface of the polishing film which bounds the polishing surface is formed, one edge making an angle of around 90° with the polishing surface itself.
  • the polishing film can be positioned against the lens surface being machined with the entire polishing surface, i.e., up to the margin or edge. This is especially due to the fact that the elastic carrier layer which carries the polishing film is fitted to the lens surface, so that the polishing film lies with its entire surface against the spectacle glass.
  • the basic curvature G of the polishing film secured to the polishing head is generally somewhat larger than the curvature of the side of the spectacle glass being worked. Therefore, the concave lens surface will at first make contact with the peripheral zone before the polishing film is placed fully against the lens surface.
  • the edge To avoid unwanted polishing effects due to this edge, especially when using rather thick polishing films, it is advantageous for the edge to have a radius r of at least 0.2 mm to 10 mm or 0.5 mm to 3 mm.
  • the radius r forms a transitional zone z between the polishing surface and the peripheral surface, preferably passing tangentially into the polishing surface.
  • different values result for the remaining height h of the peripheral surface. If the radius r runs out to a support surface of the polishing film arranged opposite the polishing surface, the height h is reduced to zero.
  • a common feature of all designs is that there is no unbroken edge at the start of the polishing process which might adversely affect the polishing result.
  • the radius r or the chamfer f should be chosen so that on the one hand the edge is sufficiently broken and on the other hand the polishing film does not become too thin, or else it will tear more easily.
  • Polishing films are generally at most 0.5 mm to 3 mm thick.
  • the thickness d most often used is between 0.8 mm and 2 mm.
  • the edge has a chamfer f with a dimension of f1 ⁇ f2, where the dimension f1 or f2 is at least 0.2 mm to 10 mm or 0.5 mm to 3 mm.
  • the dimension f1 or f2 is at least 0.2 mm to 10 mm or 0.5 mm to 3 mm.
  • a radius r can also be worked into said transition, so that no edge remains behind at the transition between the chamfer f and the polishing surface. The influence of the chamfer f on the height h results accordingly.
  • the radius r or the chamfer f can be worked into the polishing film by a cutting process or a grinding process.
  • the radius r or the chamfer f form a rounding or flattening of the edge remaining between the polishing surface and the peripheral surface after the fabrication process.
  • a cutting process using a milling cutter or a cutting process using a grinding tool can be used for this.
  • the basic curvature G of the polishing film secured to the polishing head can be determined by the curvature of a coupling surface of the basic body of the polishing head, since the curvature of the basic body is transferred to the elastic carrier layer. But the elastic carrier layer only partly transfers this curvature to the polishing film, so that the basic curvature G of the fastened polishing film is somewhat larger, i.e., it has a somewhat larger radius than the curvature of the basic body.
  • the polishing film can also itself have the basic curvature G thanks to a corresponding manufacturing or machining process. In the case without basic curvature G, neither the polishing film nor the basic body or the carrier layer has a curvature.
  • the edge between the polishing surface and the peripheral surface is sufficiently distanced from the lens surface being polished. A detrimental influence on the polishing results is prevented. Especially when the polishing film is unused, said edge is relatively stiff, so that detrimental influences might be produced.
  • the elastic carrier layer is generally made of foam material and forms the connecting element to the coupling surface of a basic body G of a polishing head. If the elastic carrier layer is secured to the basic body, the polishing head so formed can be used with the polishing film secured to the carrier layer.
  • the fastening of the polishing film generally occurs via a glue connection or by vulcanization or a hook and eye closure.
  • peripheral curvature g it can be advantageous for the peripheral curvature g to be limited to a maximum of 10% or 50% of the peripheral zone.
  • the polishing film projects radially beyond the carrier layer by more than the peripheral zone.
  • This projection U has no curvature, or only the basic curvature G.
  • a polishing head with a polishing film as described above, which is suitable for zone polishing of a plastic spectacle lens.
  • This suitability is due to the fact that the carrier layer is elastically configured and the polishing head or the carrier layer with the polishing film is smaller by a diameter of around 45 mm than a spectacle lens or semifinished product being machined.
  • the diameter of a spectacle lens being machined is on average 60 mm to 85 mm. In this case, an edge machining has not yet been done for the spectacle lens being polished.
  • the method according to the invention involves feeding the polishing film to a cutting tool, such as a cup-shaped grinding tool or a milling head, and breaking the edge by the cutting tool.
  • a cutting tool such as a cup-shaped grinding tool or a milling head
  • the edge after this preferably has a radius r and/or a chamfer f of at least 0.2 mm to 10 mm or 0.5 mm to 5 mm. This occurs independently of a basic curvature G of the polishing film.
  • the peripheral curvature produces a peripheral region of the polishing film at a distance from the lens surface.
  • the peripheral curvature g can also be chosen to be very small with increasing distance from the peripheral surface, since the transition between the projecting peripheral region of the polishing film and the polishing surface of the polishing film making contact with it is sufficiently constant.
  • the basic curvature G is accomplished by fastening the naturally flat or level polishing film to an elastic carrier layer partly reflecting the convex shape of the basic body.
  • the carrier layer itself is a hollow cylinder, with no curvature at the contact zone or at the top or bottom side.
  • the basic curvature G can also be an intrinsic part of the polishing film, i.e., generated in a corresponding manufacturing or machining process of the polishing film.
  • the carrier layer can generally be secured already to a basic body of a polishing head, serving to hold the polishing head in a tool spindle for the machining of the polishing film.
  • the polishing film can also be machined basically before the fastening onto the carrier layer and for this it is placed in a separate workpiece holder.
  • the molding of the peripheral curvature g can also be done by a molding process with the use of heat and/or pressure. This depends primarily on the material properties of the polishing film.
  • a structurized material web is produced before carving out the polishing film, which has several formations whose shape corresponds to a polishing film with a peripheral curvature g arranged in the peripheral zone, and in that the carving out of the respective formation produces a polishing film with a peripheral curvature g situated in the peripheral zone. Since it is not easily possible to mold the peripheral curvature g, especially in the case of materials like duopolistic, a molding of the peripheral curvature g during the generic manufacturing process of the corresponding film or material web is advantageous.
  • the material web is provided with corresponding troughlike formations or indentations during the fabrication, having the geometry of the ultimately desired polishing film with peripheral curvature g. The formations or indentations are cut out or punched out from the material web produced in this way.
  • FIG. 1 a sectional representation of a polishing head with various detail views
  • FIG. 1 a another detail view
  • FIG. 2 a , 2 b a perspective diagram of a material web of the film.
  • the polishing head 2 has a basic body 2 . 2 for seating in a polishing spindle (not shown), an elastic carrier layer 2 . 1 fastened on the basic body 2 . 2 and a polishing film 1 fastened on the elastic carrier layer 2 . 1 .
  • the basic body 2 . 2 has a concavely shaped coupling surface 2 . 3 , on which the carrier layer 2 . 1 is secured.
  • the elastic carrier layer 2 . 1 has a contact zone 2 . 4 , on which the polishing film 1 is secured.
  • the contact zone 2 . 4 and therefore the polishing film 1 are likewise concavely shaped, according to the coupling surface 2 . 3 .
  • the polishing film 1 has a basic diameter D, which is around 15% larger by a width b than a basic diameter D′ of the carrier layer 2 . 1 . Therefore, a radial projection of the polishing film 1 results, whose configuration shall be described hereafter by means of the detail views D1, D2 and D3, as well as FIG. 1 b .
  • the elastic carrier layer 2 . 1 has a convex top side, following the shape of the coupling surface 2 . 3 of the basic body 2 . 2 , with a basic curvature G, whose radius of curvature thanks to the elasticity of the carrier layer 2 . 1 is somewhat larger than that of the coupling surface 2 . 3 .
  • the polishing film 1 has a peripheral zone 1 . 4 , which extends for a width b, which corresponds to 5% of the diameter D of the polishing film 1 .
  • a peripheral curvature g is formed on the polishing film 1 , which differs in size from the basic curvature G.
  • the peripheral curvature g is superimposed on the basic curvature G.
  • the polishing film 1 has a polishing surface 1 . 1 which can be placed against the spectacle lens 3 , which according to detail view D1 runs radially outward across the peripheral zone 1 . 4 as far as one edge 1 . 3 .
  • the edge 1 . 3 constitutes the boundary between the polishing surface 1 . 1 and a peripheral surface 1 . 2 adjoining the polishing surface 1 . 1 .
  • the edge 1 . 3 is given a sufficiently large distance from a rear side 3 . 2 of a plastic spectacle lens 3 which can be placed against the polishing surface 1 . 1 according to the basic curvature G.
  • the plastic spectacle lens 3 does not come into contact with the edge 1 . 3 and at least a part of the peripheral zone 1 . 4 .
  • the peripheral surface 1 . 2 in the region of the edge 1 . 3 makes an angle of around 90° with the polishing surface 1 . 1 .
  • This geometry results from the punching out process of the polishing film 1 from a material web forming the polishing film 1 by means of a cup-shaped punching tool.
  • the polishing film 1 has a radius r in the region of the edge 1 . 3 so that the former edge 1 . 3 is broken. Thanks to the radius r, a transitional zone z is formed between the peripheral surface 1 . 2 and the polishing surface 1 . 1 , which runs tangentially into the polishing surface 1 . 1 . Depending on a thickness d of the polishing film 1 on the one hand and the chosen radius r on the other hand, a remaining height h is produced for the peripheral surface 1 . 2 , which is preferably not larger than 50% of the thickness d. Thanks to the forming of the radius r, it is not necessary to form a peripheral curvature g, as shown in detail view D1. Even so, both the peripheral curvature g and the radius r can also be provided.
  • a chamfer f on the edge 1 . 3 As an alternative to the radius r described in detail view D2 there is provided a chamfer f on the edge 1 . 3 .
  • the chamfer f has the dimensions f1, f2.
  • the two dimensions f1, f2 are chosen such that a transition between the chamfer f and the polishing surface 1 . 1 is as smooth as possible.
  • a remaining height h of the peripheral surface 1 . 2 results, depending on the particular dimensions f1, f2 for the chamfer f on the one hand and the thickness d of the polishing film 1 on the other hand.
  • the polishing head 2 can be positioned with the polishing film 1 against a plastic spectacle lens 3 or a rear side of the spectacle lens 3 for the purpose of polishing the rear side 3 . 2 .
  • the polishing head 2 will in addition or alternatively to the rear side 3 . 2 of the spectacle lens 3 also polish a front side 3 . 1 of the spectacle lens 3 .
  • a cutting tool such as a grinding tool or a milling cutter.
  • the forming of the peripheral curvature g is done by the use of an appropriate mold.
  • the radius r is chosen such that the polishing film 1 runs out to a point at the edge 1 . 6 .
  • the radius r makes an angle ⁇ of around 40° with a supporting surface 1 . 5 lying opposite the polishing surface 1 . 1 .
  • the angle ⁇ subtended between the radius r or the chamfer f and the supporting surface 1 . 5 should not be less than 30°, so that the polishing film 1 does not tear.
  • the structurized material web 4 of the polishing film 1 has several formations 4 . 1 , 4 . 1 ′, whose shape corresponds to a polishing film 1 with a peripheral curvature g situated in the peripheral zone 1 . 4 .
  • the formation 4 . 1 is configured to be upwardly projecting, while according to FIG. 2 b the formation 4 . 1 is downward projecting.
  • the respective formation 4 . 1 is carved out and thus one obtains a polishing film 1 with a peripheral curvature g situated in the peripheral zone 1 . 4 , such as is secured on the carrier layer according to detail view D1.
  • the polishing film 1 shown here has no basic curvature G. It is given such curvature by being fastened to the convex shaped elastic carrier layer 2 . 1 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US14/396,237 2012-04-27 2013-04-23 Polishing film for plastic spectacle lenses Abandoned US20150093978A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012103743.4 2012-04-27
DE201210103743 DE102012103743A1 (de) 2012-04-27 2012-04-27 Polierfolie für Kunststoff-Brillengläser
PCT/EP2013/058384 WO2013160297A2 (de) 2012-04-27 2013-04-23 Polierfolie für kunststoff-brillengläser

Publications (1)

Publication Number Publication Date
US20150093978A1 true US20150093978A1 (en) 2015-04-02

Family

ID=48430681

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/396,237 Abandoned US20150093978A1 (en) 2012-04-27 2013-04-23 Polishing film for plastic spectacle lenses

Country Status (4)

Country Link
US (1) US20150093978A1 (de)
CN (1) CN104379302B (de)
DE (1) DE102012103743A1 (de)
WO (1) WO2013160297A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014206424A1 (de) 2014-04-03 2015-10-08 Carl Zeiss Vision International Gmbh Polierwerkzeug sowie Vorrichtung und Verfahren zur formfehleroptimierten Polierbearbeitung von Brillenlinsenoberflächen und Gießformschalen zur Brillenlinsenherstellung

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2375263A (en) * 1944-06-27 1945-05-08 Carborundum Co Method of making abrasive articles
US3522680A (en) * 1967-03-23 1970-08-04 George M J Sarofeen Expanded metal facing for a lens abrading tool
US4010583A (en) * 1974-05-28 1977-03-08 Engelhard Minerals & Chemicals Corporation Fixed-super-abrasive tool and method of manufacture thereof
US4288233A (en) * 1978-01-25 1981-09-08 Wiand Ronald C Abrasive pads for lens lapping tools
US5104421A (en) * 1990-03-23 1992-04-14 Fujimi Abrasives Co., Ltd. Polishing method of goods and abrasive pad therefor
US20020132573A1 (en) * 2001-03-19 2002-09-19 3M Innovative Properties Company Sanding disc
US20080305723A1 (en) * 2007-06-06 2008-12-11 Satisloh Ag Polishing disc for a tool for the fine machining of optically active surfaces particularly on spectacle lenses and method for its production
US20100151772A1 (en) * 2008-12-16 2010-06-17 Schneider Gmbh & Co. Kg Polishing head for the zonal machining of optical spectacle surfaces
US20100178858A1 (en) * 2007-07-16 2010-07-15 Essilor International (Compagnie Generale D'optique) Optical grade surfacing device
DE102010035526A1 (de) * 2010-08-25 2012-03-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Feinbearbeitungsmembran und -werkzeug
US8128464B2 (en) * 2008-02-18 2012-03-06 Jsr Corporation Chemical mechanical polishing pad

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU440562B2 (en) * 1968-09-18 1973-09-18 Livinia Inc Grinding pad
EP1777035A3 (de) * 2004-11-09 2007-05-16 Seiko Epson Corporation Elastisches Polierwerkzeug und Verfahren zum Polieren einer Linse mit einem solchen Werkzeug
DE102005010583A1 (de) * 2005-03-04 2006-09-07 Satisloh Gmbh Polierteller für ein Werkzeug zur Feinbearbeitung von optisch wirksamen Flächen an insbesondere Brillengläsern

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2375263A (en) * 1944-06-27 1945-05-08 Carborundum Co Method of making abrasive articles
US3522680A (en) * 1967-03-23 1970-08-04 George M J Sarofeen Expanded metal facing for a lens abrading tool
US4010583A (en) * 1974-05-28 1977-03-08 Engelhard Minerals & Chemicals Corporation Fixed-super-abrasive tool and method of manufacture thereof
US4288233A (en) * 1978-01-25 1981-09-08 Wiand Ronald C Abrasive pads for lens lapping tools
US5104421A (en) * 1990-03-23 1992-04-14 Fujimi Abrasives Co., Ltd. Polishing method of goods and abrasive pad therefor
US5104421B1 (en) * 1990-03-23 1993-11-16 Fujimi Abrasives Co.,Ltd. Polishing method of goods and abrasive pad therefor
US20020132573A1 (en) * 2001-03-19 2002-09-19 3M Innovative Properties Company Sanding disc
US20080305723A1 (en) * 2007-06-06 2008-12-11 Satisloh Ag Polishing disc for a tool for the fine machining of optically active surfaces particularly on spectacle lenses and method for its production
US20100178858A1 (en) * 2007-07-16 2010-07-15 Essilor International (Compagnie Generale D'optique) Optical grade surfacing device
US8128464B2 (en) * 2008-02-18 2012-03-06 Jsr Corporation Chemical mechanical polishing pad
US20100151772A1 (en) * 2008-12-16 2010-06-17 Schneider Gmbh & Co. Kg Polishing head for the zonal machining of optical spectacle surfaces
DE102010035526A1 (de) * 2010-08-25 2012-03-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Feinbearbeitungsmembran und -werkzeug

Also Published As

Publication number Publication date
CN104379302A (zh) 2015-02-25
DE102012103743A1 (de) 2013-10-31
CN104379302B (zh) 2017-01-25
WO2013160297A2 (de) 2013-10-31
WO2013160297A3 (de) 2014-08-07

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AS Assignment

Owner name: SCHNEIDER GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHNEIDER, GUNTER;HUTTENHUIS, STEPHAN;ACHENBACH, FERDINAND;REEL/FRAME:034124/0447

Effective date: 20141031

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION