WO2006029229A1 - Appareil et procede de perçage de lentilles - Google Patents

Appareil et procede de perçage de lentilles Download PDF

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Publication number
WO2006029229A1
WO2006029229A1 PCT/US2005/031914 US2005031914W WO2006029229A1 WO 2006029229 A1 WO2006029229 A1 WO 2006029229A1 US 2005031914 W US2005031914 W US 2005031914W WO 2006029229 A1 WO2006029229 A1 WO 2006029229A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
drill
drilling
support arm
pivoting
Prior art date
Application number
PCT/US2005/031914
Other languages
English (en)
Inventor
Daniel E. Andrews
Kurt W. Schaeffer
Original Assignee
National Optronics, Inc.
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 National Optronics, Inc. filed Critical National Optronics, Inc.
Priority to JP2007531315A priority Critical patent/JP2008512266A/ja
Priority to EP05794830A priority patent/EP1786608A1/fr
Publication of WO2006029229A1 publication Critical patent/WO2006029229A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/143—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling lens-drilling machines
    • 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 disclosed invention relates to a system and method for processing eyeglass lens blanks for use with rimless frames. Specifically, the invention provides a system and method for drilling predetermined holes for a rimless frame into curved eyeglass lenses, whereby the drilling system and procedure may be integrated into a lens edger machine.
  • Prescription eyeglass lenses are curved in such a way that light is correctly focused onto the retina of a patient's eye, improving vision.
  • Such lenses are formed from glass or plastic lens "blanks" having certain desired properties to provide the correct prescription for the patient.
  • the lens blanks are usually circular and of substantially larger dimension, for example four inches in diameter and up to one half inches thick, compared to the relatively smaller finished lenses assembled into eyeglass frames. Therefore, a lens blank must be edged to fit an eyeglass frame selected by the patient.
  • Ophthalmic laboratory technicians prepare lenses according to prescriptions provided by dispensing opticians, optometrists, or ophthalmologists.
  • the specifications include the patient's full prescription, including: 1) the total power the finished lens must have; 2) the strength and size of any segments, if needed (i.e. multifocal lenses); 3) the power and orientation of any cylinder curves; and 4) the location of the optical center and any inducted prism that may be needed.
  • the technicians must also drill mounting holes for the rimless lens.
  • the process of preparing eyeglass lenses from lens blanks requires great care and precision. It is particularly important that precision and accuracy be used when orienting the blank before edging, as described above, so that the proper curvature, optical center and shape are achieved. If the blank is misaligned, the lens will not have the prescribed specifications. It is also particularly important that the drilling procedure be accurate and adaptable to different sized holes for mounting the point frame. Technician time, as well as materials, will be wasted if the blank is improperly prepared. The need exists for a drilling system and method for drilling a closed-end hole, slot or notch in an edged face of a frameless lens with accuracy and efficiency.
  • the present invention provides a lens drilling device for drilling a hole into a lens held by a lens retaining system, comprising a base; a pivoting drill support arm, whereby the pivoting drill support arm is adapted to pivot from a retracted position where the drill is pivoted away from a working area to an extended position where the drill is positioned to act on the lens.
  • a motor is mounted to the pivoting drill support arm to drive a drill mounted to the pivoting drill support arm remote from the motor.
  • the drill is substantially stationary when performing a drilling procedure in the extended position.
  • the lens drilling device is a modular unit that is selectively mounted to a lens processing apparatus (i.e., an edger) that is adapted to edge the peripheral edge of the lens.
  • the modular drill unit may be a bolt-on unit that bolts to a lens edger.
  • the present invention also provides a lens processing apparatus comprising an edger and a drill mechanism.
  • the apparatus comprises an apparatus main body and at least one lens rotating shaft provided to rotate and translate in the apparatus main body.
  • a drive device drives the at least one lens rotating shaft in linear and rotary directions.
  • the lens is held by a lens holding system disposed on the lens rotating shaft.
  • a lens drilling device is also provided to drill a hole or other feature into the lens held by the lens holding system.
  • the drilling device comprises a base and a pivoting drill support arm adapted to pivot from a retracted position where the drill is pivoted away from a working area to an extended position where the drill is positioned to act on the lens.
  • a motor is mounted to the pivoting drill support arm to drive a drill mounted to the pivoting drill support arm remote from said motor.
  • Figure 1 is a schematic illustrating an edger with drilling capability with the edger and drill system being housed in housing with an associated conveyor for delivering lens blanks to and from the machine and an optional vacuum.
  • Figure 2 is a perspective view of the drill mechanism of this invention with the drill shown in a retracted position.
  • Figure 3 is a perspective view of the drill mechanism of this invention with the drill shown in the extended position.
  • Figure 4a is a perspective view of the drill mechanism in the extended position with certain hardware omitted to expose the rotary drive system for the support arm.
  • Figure 4b is an enlarged partial view of a portion of the rotary drive mechanism according this invention.
  • Figure 5 is a perspective view showing the drill mechanism in the retracted position.
  • Figure 6 is a perspective view from the same angle as Figure 5 showing the drill mechanism in the extended position and with certain hardware omitted to expose the rotary drive system for the support arm.
  • Figure 7 is an exploded, view showing primary components for the drilling mechanism of this invention.
  • Figure 8 is a perspective view showing the drill mechanism of this invention mounted within an edger machine.
  • FIGS 9a-9f illustrate different stages of the drilling operation performed by the drill machine of this invention.
  • Figure 10 is a table detailing the cutting path taken for the different possible lens features and positions.
  • Figure 1 1 shows a preferred example of the drill mill used with the present invention. DETAILED DESCRIPTION OF PREFERRED EMBODIMENT The present invention will be described hereinafter in further detail with reference to the accompanying drawings.
  • Figure 1 is a schematic showing a patternless edger with drilling capability with the edger and drill system being housed in housing 12 with an associated conveyor 14 for 'delivering lens blanks to and from the machine and a vacuum 16 for dust and debris created during the edging and drilling processes.
  • a display 18 e.g., 15" color flat panel LCD
  • the display 18 drill hole placement for drilled lenses is displayed for viewing and/or adjustments.
  • the modular design isolates the electronics and cutter motor from the cutting chamber within the housing 12.
  • the automated edging system is designed with an automatic loading, dedicated pick and place assembly unit for each edger.
  • the edger' s unique back-loading feature provides complete accessibility to the front of the unit for both maintenance and troubleshooting.
  • the pick and place mechanism incorporates state-of-the art technology; using a pneumatic cup, the arm picks-up the lens from its tray and places it in the cdger/drill combination. Once the lens is complete, the mechanism reverses itself, removing the lens and replacing it in the tray of the conveyor 14 before repeating the cycle.
  • the edger/drill system is versatile and can meet a given lab's preference for loading/unloading through either a tray stacker or a conveyor system 14.
  • a Windows®-like format is easy to use and the PC- based software accumulates reliable and accurate data for customers.
  • the system of this invention is designed to store an edger-resident database which permits adding and editing frame information.
  • the system of this invention offers a 'help' screen for maintenance functions and operating instructions for inexperienced operators.
  • the edger/drill combination provides the ability to store information about drill data (feature type, position, size, etc) in an internal database. This information can be used to quickly retrieve drill information about a lens for edging purposes.
  • the information can be retrieved from the database multiple ways. First, after job information is downloaded from a third-party software package, the edger will use the frame manufacturer name, frame model name, and frame eye size to create a unique key to locate drill information from the database. This information is retrieved, and automatically added to the job. No further input about drill information is required by the operator to cause the lens to be drilled with the correct features. Alternately, the operator can manually search the internal drill database to locate information for a job to be drilled. The database is searched using the frame manufacturer name and frame model name/frame eye size.
  • the operator also has the option of adding new drill records to the database via an input (e.g., keyboard 19). These records are stored internally on the edger/drill system where they are entered.
  • a database can easily be transferred from one edger to another by making a backup of the database to a floppy disk, and then importing that database into another edger. Contained within the housing 12 of the edger and drill combination is a modular drill system. While edger of this invention is uniquely designed to mount a separate modular drilling system, the following description will center on the drilling mechanism.
  • the modular, bolt-on drill mechanism 20 is shown in a retracted position ( Figure 2) and an extended position ( Figure 3) with certain covers and housings removed and wiring not shown.
  • the pivoting drill mechanism adds to the versatility of this system by selectively entering the work area of the edger when a drill procedure is desired. Likewise, the drill mechanism can pivot out of the work area to reduce or eliminate any interference with the edging process.
  • the drill mechanism is mounted to the edger unit (not shown) through a drill base
  • a drill 30 is mounted to the base 22 through a pivoting drill support arm 40 which is mounted to the back wall 22b through a suitable bearing system (see Figure 7). With this arrangement, the drill 30 is removably disposed at the distal end of the drill support arm 40 and remote from the motor 32 to permit the drill 30 to be suitably serviced when necessary.
  • the drill mechanism 20 is bolted or otherwise mounted to an edger machine known to those of skill in the art (e.g., National Optronics model 7E patternless edger).
  • the drill mechanism is mounted to pivot from the retracted position where the drill 30 is pivoted away from a working area ( Figure 2) to an extended position where the drill 30 is positioned to act on a lens ( Figure 3).
  • a drill motor 32 is also mounted to the drill support arm 40 and drives the drill 30 through a toothed belt or other suitable drive system 34 (e.g., gearing or chain drive system).
  • the drill is driven at a rate of about 18-20 thousand rpms.
  • the remote location of the motor 32 increases the versatility and serviceability of the drilling mechanism because it permits the chuck and drill to be serviced and replaced without impacting the motor or other drill components.
  • a rotary mechanism shown in Figures 4a, 4b is provided to pivot the drill support arm 40 from the retracted position to the extended position.
  • the rotary mechanism preferably comprises a gear motor 50 fixed to the back wall 22b of the base 22 and a worm gear 52 fixed to the drill support arm 40.
  • the motor 50 drives pinion gear 51 which in turn drives the worm gear 52 and, as a result, torque delivered from the motor 50 causes pivoting of the drill support arm 40 from the retracted position ( Figure 2) to the extended position ( Figure 3).
  • Suitable travel limit switches are provided to control the pivoting movement of the support arm 40; specifically, movement of the support arm 40 causes actuation of travel limit switches (see Figures 5, 6 and 7) at both the extreme positions defined by the retracted and extended positions to thereby de-energize the motor 50. Further structure of the drill mechanism is shown in Figures 5 and 6 whereby
  • Figure 5 illustrates the drill mechanism 20 in the retracted position
  • Figure 6 illustrates the drill mechanism 20 in the extended position with the cover for the rotary mechanism removed.
  • the rotary mechanism comprises the motor 50 that drive the support arm 40 through the pinion gear 51 and worm gear 52.
  • travel limit switches 56, 58 are mounted to the back wall 22b adjacent windows 22b' to limit the drive torque provided by the rotary mechanism.
  • the motor 50 drives the support arm from the extended position ( Figure 6) to the retracted position ( Figure 5)
  • the actuating finger 66 actuates the travel limit switch 68 (see Figure 7) to de-energize the motor 50.
  • FIG 7 is an exploded view showing primary components for the drilling mechanism 20 and Figure 8 is a perspective view showing the drill mechanism 20 mounted within an edger machine.
  • the edger travels to a withdrawn position (in the direction of arrow 'R' in Figure 8) before the drill mechanism 20 pivots from the retracted position shown in Figure 5 into the extended position shown in Figure 8. Then, the edger travels back to the working position shown in Figure 8 so that the edger and/or drill can perform work on the lens 100.
  • the edger again travels to the withdrawn position so that the drill can be pivoted to the retracted position (see Figures 2 and 5). With this arrangement, the drill is out of the work area when not in use.
  • the compact arrangement noted with reference to Figure 1 is maintained despite the fact that the drill mechanism has the versatility to pivot into and out of the work area of the edger.
  • the drill 30 is substantially stationary when performing a drilling procedure in the extended position shown in Figure 3. Since the drill is stationary, the control process and algorithm for the drill procedure is primarily controlled through the movement of the lens holder system defined by the edger (see Figure 8). The specific drilling algorithm for holes, slots and notches will be described in detail below.
  • the drill mechanism of this invention provides the ability to cut holes, slots, and/or notches of varying size, using a single drill mill which performs a combination side mill and a circular cut.
  • An algorithm is used which allows a single size drill mill to cut these features of various sizes.
  • the drill mill when mounted in the edger, is oriented at a 10° angle relative to the axis of lens rotations, and thus requires a coordinated movement between the size and bevel carriages when engaging or retracting the drill mill and the lens. This coordinated movement prevents any enlarging of the hole caused by the drill being located at a 10° angle.
  • the drill mill may be positioned at different angles relative to the lens or the system may be designed to have an adjustable attack angle for the drill mill. Holes, slots or notches which are larger than the drill mill are cut using two passes. Before cutting each pass, the edger will assure that the axis backlash has been mitigated from the system.
  • Figures 9a-9f the following steps detail how a hole that is larger than the drill mill is cut into a lens 100.
  • the drill remains stationary while the lens 100 is moved and rotated by the edger.
  • Figures 9a-9f show only the lens holding portion of the edger and a portion of the lens 100 in which the hole is cut.
  • Figures 9a-9f also show the position of the drill mill 200 relative to the lens 100 in conjunction with the movement of the lens 100 as the hole is cut.
  • the top of the hole (as seen by the drill mill 200) is rotated below the drill mill by a distance of 4 grads which is sufficient to mitigate gearbox backlash.
  • those of skill in the art will have sufficient details about the specifications and tolerances for each particular machine to determine the proper pre-drilling rotation to mitigate gearbox backlash.
  • the cdger then rotates the lens 100 upward, so that the top of the hole to be cut is in the proper location for cutting. All drilling will be performed using an upward axis motion, to prevent any negative impact from the axis gearbox backlash.
  • the drill mill next engages the lens ( Figure 9a), in preparation for the first pass at enlarging the drilled hole.
  • the drill mill follows a path to cut the inside edge of the hole in the lens 100. Again, the axis will only move in an upward direction during this stage of cutting.
  • the approximate path of the drill mill 200 (as seen by the lens 100) is indicated by the arrow 'A' shown in Figure 9b.
  • the edger retracts the drill mill 200 from the lens 100, and rotates the axis and the lens 100 so that the top of the hole (as seen by the drill mill 200) is rotated (counterclockwise) below the drill mill 200 by a distance of 4 grads. This is done once again to mitigate any axis gearbox backlash.
  • the axis is then rotated upward (clockwise), thus locating the exact same position as previous at the top of the hole (i.e., the 12 o'clock position shown in Figures 9a and 9d) in the proper position to begin cutting.
  • the drill mill 200 again engages the lens 100 at the 12 o ' clock in preparation for the second and final pass.
  • the drill mill 200 next follows a path shown by arrow 'B' to cut the outside edge of the hole into the lens 100. During this cutting motion, the axis will only move in an upward direction so that no axis backlash is encountered.
  • the approximate path of the drill mill (as seen by the lens) is indicated by the arrow 'B' in Figure 9e until the 6 o'clock position shown in Figure 9f is reached.
  • the drill mill 200 is retracted from the hole and drilling of this hole feature is complete.
  • the drill mechanism also cuts slots and notches in a similar fashion to the method used for cutting holes larger than the drill mill 200. During the cutting of slots and/or notches, the axis of rotation of the lens will always be in the same direction, to help mitigate the effect of backlash in the gearbox.
  • the table of Figure 10 details the cutting path taken for the different possible lens features and positions.
  • the solid line indicates the path cut on the first pass, and the dashed line indicates the path cut on the second pass. Using these paths at the specified locations guarantees that the axis of rotation will only be required to rotate one direction while cutting.
  • the following steps outline the general procedure used when cutting a slot or a notch.
  • the top of the feature (as seen by the drill mill) is rotated below the drill mill 200 by a distance of 4 grads (more than enough to mitigate any backlash).
  • the axis then rotates the lens upward, so that the top of the feature is in the proper location for cutting. All drilling will be performed using an upward axis motion, to prevent any negative impact from the axis gearbox backlash.
  • the drill mill 200 next engages the lens, in preparation for the first pass at drilling the feature.
  • the drill mill 200 follows a path to cut the first pass of the feature in the lens (shown in solid lines in Figure 10). Again, the axis will only move in an upward direction during this stage of cutting.
  • the edger retracts the drill mill from the lens, and rotates the axis so that the top of the feature (as seen by the drill mill) is rotated below the drill mill by a distance of 4 grads. This is done once again to mitigate any axis gearbox backlash.
  • the axis is then rotated upward, locating the exact same position as previous at the top of the feature in the proper position to begin cutting; i.e., the location where the solid lines meet the dotted lines in Figure 10.
  • the drill mill engages the lens in preparation for the second and final pass.
  • the drill mill next follows a path to cut the second pass of the feature into the lens (shown in dotted lines in Figure 10). During this cutting motion, the axis will only move in an upward direction so that no (or substantially no) axis backlash is encountered.
  • the drill mill is retracted from the lens. Drilling of this slot or notch feature is complete.
  • Figure 1 1 shows a preferred example of the drill mill 200 available from Kyocera Corporation used with the present invention.
  • the cutting diameter is approximately lmm with an effective flute length of 10mm.
  • the drill mill of Figure 1 1 includes a right hand spiral having right hand cut with side cutting 30° helix angle.
  • the flute and tip geometries should be optimized for cutting both thermoset and the ⁇ noplastic polymers typically used for eyeglass lenses.
  • the overall system of this invention is a streamlined state of the art patternless edger with drilling capability.
  • the angle of the drill is designed to cut perpendicular to the front surface of the lens. This technique provides excellent frame fit and an aesthetically pleasing product.
  • the system can drill up to 6 features in each lens, in hole diameters or slot widths ranging from 1 mm to 5 mm.
  • the edger can quickly drill accurate, clean and chatter-free holes in all lens materials without requiring a drill mill change.

Abstract

L'invention concerne un dispositif de perçage de lentilles permettant de percer un trou dans une lentille maintenue par un système de retenue de lentilles, comprenant un socle ; un bras de support de foret pivotant, le bras de support de foret pivotant étant conçu pour pivoter d'une position rétractée, dans laquelle le foret est éloigné, par pivotement, par rapport à une zone de travail, à une position déployée, dans laquelle le foret est positionné pour agir sur ladite lentille selon un angle approprié perpendiculaire à la surface de la lentille. Un moteur est monté sur le bras de support de foret pivotant afin d'entraîner un foret monté sur le bras de support de foret pivotant à distance du moteur. Le foret est sensiblement stationnaire lors de l'exécution d'une procédure de perçage dans la position déployée. Dans un mode de réalisation préféré, le mécanisme de perçage est une unité modulaire qui se boulonne sur une machine à couper les bords afin d'obtenir une machine à couper les bords sans motif, de pointe, profilée, présentant une capacité de perçage.
PCT/US2005/031914 2004-09-08 2005-09-07 Appareil et procede de perçage de lentilles WO2006029229A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007531315A JP2008512266A (ja) 2004-09-08 2005-09-07 レンズにドリル作業する装置及びその方法
EP05794830A EP1786608A1 (fr) 2004-09-08 2005-09-07 Appareil et procede de perçage de lentilles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60758004P 2004-09-08 2004-09-08
US60/607,580 2004-09-08

Publications (1)

Publication Number Publication Date
WO2006029229A1 true WO2006029229A1 (fr) 2006-03-16

Family

ID=35478297

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/031914 WO2006029229A1 (fr) 2004-09-08 2005-09-07 Appareil et procede de perçage de lentilles

Country Status (5)

Country Link
EP (1) EP1786608A1 (fr)
JP (1) JP2008512266A (fr)
KR (1) KR20070050066A (fr)
CN (1) CN101065224A (fr)
WO (1) WO2006029229A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112646291A (zh) * 2020-12-21 2021-04-13 隆昌特斯瑞汽车零部件有限公司 一种汽车电子后视镜底座的制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012148370A (ja) * 2011-01-19 2012-08-09 Mitsubishi Gas Chemical Co Inc プラスチック眼鏡レンズ孔開け方法
CN106002535B (zh) * 2015-03-31 2020-05-22 尼德克株式会社 眼镜镜片加工装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882247A (en) * 1996-07-22 1999-03-16 Briot International Machine for grinding of optical glasses
US20020168920A1 (en) * 2001-03-22 2002-11-14 Loh Optikmaschinen Ag Device for edge-machining of optical lenses
US20040058624A1 (en) * 2002-09-20 2004-03-25 Kabushiki Kaisha Topcon Lens grinding processing apparatus
WO2004087374A1 (fr) * 2003-03-27 2004-10-14 Briot International Machine de meulage de verres optiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882247A (en) * 1996-07-22 1999-03-16 Briot International Machine for grinding of optical glasses
US20020168920A1 (en) * 2001-03-22 2002-11-14 Loh Optikmaschinen Ag Device for edge-machining of optical lenses
US20040058624A1 (en) * 2002-09-20 2004-03-25 Kabushiki Kaisha Topcon Lens grinding processing apparatus
WO2004087374A1 (fr) * 2003-03-27 2004-10-14 Briot International Machine de meulage de verres optiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112646291A (zh) * 2020-12-21 2021-04-13 隆昌特斯瑞汽车零部件有限公司 一种汽车电子后视镜底座的制造方法

Also Published As

Publication number Publication date
KR20070050066A (ko) 2007-05-14
CN101065224A (zh) 2007-10-31
EP1786608A1 (fr) 2007-05-23
JP2008512266A (ja) 2008-04-24

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