WO2000067974A1 - Machine de percage et de fraisage de verres a lunettes - Google Patents

Machine de percage et de fraisage de verres a lunettes Download PDF

Info

Publication number
WO2000067974A1
WO2000067974A1 PCT/IB2000/000577 IB0000577W WO0067974A1 WO 2000067974 A1 WO2000067974 A1 WO 2000067974A1 IB 0000577 W IB0000577 W IB 0000577W WO 0067974 A1 WO0067974 A1 WO 0067974A1
Authority
WO
WIPO (PCT)
Prior art keywords
machine
lens
mandrel
support
guide
Prior art date
Application number
PCT/IB2000/000577
Other languages
English (en)
Inventor
Giovanni Gioacchini
Original Assignee
Centro Ottico Foto G.I.O. S.N.C. Di Gioacchini Giovanni & C.
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 Centro Ottico Foto G.I.O. S.N.C. Di Gioacchini Giovanni & C. filed Critical Centro Ottico Foto G.I.O. S.N.C. Di Gioacchini Giovanni & C.
Priority to AU41378/00A priority Critical patent/AU4137800A/en
Publication of WO2000067974A1 publication Critical patent/WO2000067974A1/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

Definitions

  • the present invention relates to the eyeglass field and it particularly concerns a machines for drilling holes and/or making millings, through or blind, on eyeglass lenses.
  • Frames are generally connected to the lenses by means of connecting elements comprising screws which are housed in through holes, i.e. holes that traverse the entire thickness of the lens, and that engage with internal threads obtained in complementary fastening elements.
  • suitable constraining conditions are created obtaining on the lenses pairs of mutually close drillings, variously oriented relative to the edge.
  • a parallel groove obtained on the edge of the lens is associated, in which a frame element is then house in anti-rotation condition.
  • Machines of this type require their configuration to be set up for each of the lenses to be subjected to the work process. Their fundamental drawback, therefore, consists of the long preparation times that render the work process very costly.
  • the aforesaid machines are structured for uses of a general nature, so their motors are able to output mechanical power far exceeding the cutting powers required by lens drilling; hence, since the machines are over-dimensioned for these specific applications, both their operating cost and their acquisition cost are normally not justifiable in economic terms for most of the laboratories that prepare and mount single pairs, or in any case a reduced number, of eyeglasses at a time.
  • the aim of the present invention is to eliminate the aforementioned drawbacks by means of a machine structured specifically for drilling through or blind holes of the lenses, able to allow for the broadest range of holes required to prepare lenses in a simple, rapid and cost-effective manner, regardless of the greater or lesser numbers comprising the lots of lenses to be prepared.
  • a machine for drilling or milling eyeglass lenses comprising a first fixed support for sustaining at least a lens during the work process; at least a mandrel provided with a tool rotating about an axis of rotation that can be oriented transversely to the lens, characterised in that it comprises a second support sustaining the mandrel; a guide whereon the second support is slidingly mounted to translate transversely to the optical axis of the lens towards and/or away from the edge of the lens and to position the mandrel on the lens correspondingly, in positions univocally pre-determined by the geometry of the guide.
  • the guide is embodied in particular by a removable plate provided with slots geometrically shaped according to each of the types of drillings to be performed.
  • a plurality of different plates, specialised for the various types of drilling, allows to program the machine according to the various uses.
  • the machines has all the advantages in terms of accuracy, working speed and simplicity of operations that are typical of a dedicated machine, but at the same time it also has the capability of being programmed mechanically for all possible combinations of drillings and/or millings, since it is sufficient to set up, the first time a new working process is performed, the specific plate which then remains available for future occurrences of this type of work process.
  • the machine is provided with two mandrels, a single plate fitted with equal and symmetrical slots allows simultaneously to work on the right lens and the left lens of the same pair of eyeglasses, with the certainty of the perfect symmetry of the drillings and with obvious doubling of production in the unit of time.
  • the dual-mandrel configuration of the machine has the additional advantage, particularly appreciable by small eyeglass laboratories that also perform repairs, consisting of the capability of replacing rapidly and with the utmost precision of execution a lens of a used pair of eyeglasses, because it is broken, damaged, or with unsatisfactory dioptre.
  • One of the mandrels can be used as a copier of the configuration of holes existing on the intact lens; configuration which is then executed symmetrically by the other mandrel on the new lens being prepared. Since the removable plate must be replaceable with the utmost simplicity and rapidity, the machine is provided with an operating assembly, of small size, which can be associated to and disassociated from the plate and from the machine with extreme simplicity and as a single body.
  • the operating assembly is devised in particular to integrate, on a lever articulated to the second support, the mandrel, the related activating systems and the checking elements, in turn able to be associated in bearing contact to the edge of the lenses and which delimit uni-directionally the amplitude of the stroke along the guide of the second support sustaining the mandrel.
  • Figure 1 is a perspective overall view of an embodiment of the machine according to the invention.
  • Figure 2 is a partial perspective view of the machine with parts removed, the better to highlight others;
  • - Figure 3 is a bottom plan view of a detail of Figure 2 observed from the viewpoint indicated with arrow A;
  • Figure 4 in its variants a), b), c), d), shows some examples of possible work processes executable by the machine;
  • Figure 5 is a partial perspective view of a variant of the machine with parts removed, the better to highlight others;
  • Figure 6 is a schematic view of an accessory of the machine according to the invention.
  • the number 1 globally indicates a machine provided in particular for drilling or milling lenses 2 of eyeglasses, preferably made of plastic material.
  • the machine 1 essentially comprises: a fixed structure
  • a support assembly 23 for the lenses 2 during the work process above which are located a support assembly 23 for the lenses 2 during the work process; and two identical operating assemblies 20, mutually set side by side and opposite to the support assembly 23.
  • the support assembly 23 is provided with three fixed, vertical, parallel plates 24a, 24b; and with two blocks 25 each mounted between two plates 24 a, 24b and slidingly supported on cylindrical, parallel guide rods 26.
  • An actuating screw 27 with counter- direction threads associated to the blocks 25 is positioned to traverse the plates 24a, 24b and the blocks 25, to translate the latter, in motion synchrony and with opposite directions, away from or towards the central plate 24b, upon the activation of a related knob 28.
  • the two blocks 25 sustain two first supports 3 shaped to sustain the lenses 2 during work integrally with particular and known means 29 for gripping the lens 2, operating by adhesion with adhesive material or by air vacuum.
  • the gripping means 29, which are wholly conventional, are associated to the lens 2 prior to the shaping of its peripheral edge 10, effected in previous work phases and on apparatuses whose detailed description is omitted herein, since they are not pertinent to the invention.
  • the blocks 25 are further provided with means for locking the lenses 2 and the related gripping means 29 which comprise, specifically: arms 30 able to rotate above the blocks 25; elements 31 for pressing the lenses 2, located at an extremity of the arms 30 and moved by related actuating screws 32; and constraining elements 30 for immobilising the arms 30 in the working position and embodied by screws 33 fastened to the blocks 25 and by nut screws 34 borne by cylindrical locking elements 35.
  • the support assembly 23 is able to rotate about a horizontal axis 21 to orient the first supports 3 and the related lenses 2 associated therewith, with suitable lay relative to the operating assemblies 20.
  • Each operating assembly 20 [ Figure 2] essentially comprises: a lever 15 and a second support 7 whereto is pivotingly articulated the lever 15.
  • a plate 1 1 common to both operating assemblies 20, sustains the second supports
  • Each lever 15 integrally supports, at a first extremity 16, a mandrel 4 bearing a tool 5, rotating about a substantially vertical axis of rotation 6, and presents a second extremity 17 shaped for manually gripping the lever 15, and provided with a pushbutton 18 to command the activation of the mandrel 4.
  • Checking elements 19, able to be associated in bearing contact to the edge 10 of the lenses 2, are mounted on a first extremity 16 of the lever 15, in proximity to the mandrel 4, with the possibility of being adjusted both in height and in distance relative to the tool 5 of the mandrel 4.
  • the second supports 7 are mounted above their own guide 8 [Figure 3] obtained in the plate 1 1 in such a way as to be able to slide relative to the plate 1 1 itself and translate transversely to the optical axis 9 of the lens 2 moving bi-directionally along substantially horizontal directions 32, towards and/or away from the edge 10 of the lens 2 undergoing work.
  • Each guide 8 is embodied in particular by a slot obtained on the plate 1 1.
  • Two pivot pins 12, projecting from each second support 7 and engaged in the slot 8, identify a cursor
  • the second supports 7, albeit with the freedom to slide in the guide 8, are maintained integral with the plate 1 1 by means of a suitable fastening bolt 36, of the self-locking type.
  • the length of the slot 8 and its orientation on the plate 1 1 [straight lines 32] are closely linked to the type of holes to be effected on the lenses 2.
  • the slots 8 shown in the plate 1 1 are suitable, for instance, for executing two holes [or a hole and a parallel groove] aligned on a straight line inclined relative to the horizontal axis 44 of the lens, of the type shown in Figure 4a).
  • the machine 1 Constructing the machine 1 with rapidly replaceable plates 1 1 , it is thus possible to configure the machine 1 according to the various types of work process.
  • the machine 1 is provided with a seat 37 wherein the plates 1 1 find removable housing.
  • Locking means comprising a locking screw 38a, a wing nut 38b, an adjustment slot 38c obtained on the plate 1 1 then allow to immobilise the plates 1 1 in the seat 37 itself.
  • a machine 1 provided with a plurality of plates 1 1 removable from the seat 37 and bearing slots 8 of different designs allows to execute a series of work processes that is the more numerous the higher the number of the plates 1 1, i.e. of the related slots 8.
  • the machine 1 Every time it is necessary to program the machine 1 according to a specific and new positioning of the tool 5 relative to the lens 2, it will be necessary to provide a corresponding plate 1 1 able to allow correspondingly to place the mandrel 4 on the lens 2 in positioned uni vocally pre-determined by the specific geometry of the slot 8.
  • the levers 15 are preferably in an integrated construction so that they are able to be associated to and disassociated from the plate 1 1 , as well as to and from the seat 37 of the machine 1 practically as a single body.
  • the second supports 7 sustaining the related mandrels 4 are mounted to bear onto the guide 8, i.e. above the plates 1 1.
  • a variation of the machine 1 can be obtained in a conceptually similar manner modifying the structure 22 of the machine 1 in such a way as to position the plate 1 1 above the operating assemblies 20, determining such constraint conditions that the second supports 7 are mounted in suspension from the related guides 8.
  • the operation of the machine 1 can be described starting from an initial condition in which the lenses 2 associated to the related gripping means 29 come from a machine that has profiled their edges 10. In this state, the lenses 2 are positioned on the first supports 3 and locked integrally thereto by means of the pressers 31 , if provided.
  • the support assembly 23 is the oriented in a manner able to set the lenses 2 in an opportune condition of the edges 10 relative to the axis of rotation 6 of the mandrel 4.
  • the axis of rotation 6 of the mandrel 4 is in the drilling position corresponding, for instance, to that of the hole 40 [Figure 4a] farthest from the edge 10.
  • the second supports 7 are moved backwards along the plate 1 1 and the work process can be repeated for executing the edge groove 42 or the second hole 43 adjacent to the first hole 40.
  • the sliding displacements of the second supports 7 that determine the placement in the various work positions and in the rest position of the tool 5, which in the described embodiment are obtained by manual activation, can obviously be mechanised in numerous ways. One of them can be implemented by means of a lever [not shown in the drawings] that allows to make the second supports 7 move forward and backward along the slots 8, as needed.
  • the machine 1, according to the invention, can also comprise [ Figure 6], possibly integrated on its fixed structure 22, insertion means 51, 52 for inserting a connecting element 50 into a blind hole 40 of the lens 2 to fasten a frame element.
  • the insertion means include a heating support 51, internally provided with an electrical resistor 52, which sustains the connecting element 50 from its interior and guides it along the hole 40 of the lens 2 to a fastening position.
  • the connecting element 50 can also be provided with an insulating ring 53, preferably made of Teflon, able to prevent the transmission of heat to the edge 56 of the hole 40 in proximity to the outer face of the lens 2, preventing heat from damaging the edge 56 itself.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

L'invention concerne une machine servant au perçage ou au fraisage de verres (2) à lunettes. Cette machine comprend un premier support (3), servant de support à au moins un verre (2) en cours de fabrication. La machine comprend également au moins un mandrin (4), équipé d'un outil (5) tournant autour d'un axe (6) pouvant être orienté transversalement en direction du verre (2), et un second support (7), servant de support au mandrin (4). La machine comprend enfin un guide (8) sur lequel est monté par glissement le second support (7) pour effectuer un mouvement de translation transversal par rapport à l'axe optique (9) du verre (2), en direction et/ou loin du bord (10) du verre (2), et pour placer, par conséquent, le mandrin (4) sur le verre (2) selon des positions prédéterminées de manière univoque par la forme géométrique du guide (8).
PCT/IB2000/000577 1999-05-06 2000-05-04 Machine de percage et de fraisage de verres a lunettes WO2000067974A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41378/00A AU4137800A (en) 1999-05-06 2000-05-04 A machine for drilling or milling eyeglass lenses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999RN000012A ITRN990012A1 (it) 1999-05-06 1999-05-06 Macchina per forare o fresare lenti di occhiali.
ITRN99A000012 1999-05-06

Publications (1)

Publication Number Publication Date
WO2000067974A1 true WO2000067974A1 (fr) 2000-11-16

Family

ID=11407238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2000/000577 WO2000067974A1 (fr) 1999-05-06 2000-05-04 Machine de percage et de fraisage de verres a lunettes

Country Status (3)

Country Link
AU (1) AU4137800A (fr)
IT (1) ITRN990012A1 (fr)
WO (1) WO2000067974A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT4666U3 (de) * 2001-04-24 2002-02-25 Erwin Heinz Aufspannvorrichtung für zwei optische linsen zur herstellung von radialen bohrungen und fräsungen und das damit verbundene verfahren zur herstellung von radialen bohrungen und fräsungen an optischen linsen
FR2826599A1 (fr) * 2001-06-29 2003-01-03 Timon Procede de percage de verres optiques, et dispositif de mise en oeuvre dudit procede
AT410769B (de) * 2001-04-24 2003-07-25 Erwin Heinz Aufspannvorrichtung für zwei optische linsen zur herstellung von radialen bohrungen u. fräsungen sowie verfahren zur herstellung von radialen bohrungen u. fräsungen von opt. linsen
EP1676683A1 (fr) * 2004-12-28 2006-07-05 Nidek Co., Ltd. Dispositif d'usinage de verre de lunettes
FR2888765A1 (fr) * 2005-07-25 2007-01-26 Briot Internat Sa Procede d'etalonnage d'une machine de percage de verres optiques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1068345A (fr) * 1952-12-17 1954-06-24 Lunetterie Soc Ind De Procédé et dispositif de montage de verres de lunette ou de cercles porte-verre en matière plastique sur leur monture
JPH08155945A (ja) * 1994-12-09 1996-06-18 Topcon Corp リムレスレンズ用穴開け装置とこれを用いた玉摺機とこの玉摺機に使用されるメガネ用形状測定装置
EP0739683A1 (fr) * 1995-04-27 1996-10-30 Armando Rattaro Support de pièce, en particulier pour supporter des lentilles pour lunettes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1068345A (fr) * 1952-12-17 1954-06-24 Lunetterie Soc Ind De Procédé et dispositif de montage de verres de lunette ou de cercles porte-verre en matière plastique sur leur monture
JPH08155945A (ja) * 1994-12-09 1996-06-18 Topcon Corp リムレスレンズ用穴開け装置とこれを用いた玉摺機とこの玉摺機に使用されるメガネ用形状測定装置
EP0739683A1 (fr) * 1995-04-27 1996-10-30 Armando Rattaro Support de pièce, en particulier pour supporter des lentilles pour lunettes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10 31 October 1996 (1996-10-31) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT4666U3 (de) * 2001-04-24 2002-02-25 Erwin Heinz Aufspannvorrichtung für zwei optische linsen zur herstellung von radialen bohrungen und fräsungen und das damit verbundene verfahren zur herstellung von radialen bohrungen und fräsungen an optischen linsen
AT410769B (de) * 2001-04-24 2003-07-25 Erwin Heinz Aufspannvorrichtung für zwei optische linsen zur herstellung von radialen bohrungen u. fräsungen sowie verfahren zur herstellung von radialen bohrungen u. fräsungen von opt. linsen
FR2826599A1 (fr) * 2001-06-29 2003-01-03 Timon Procede de percage de verres optiques, et dispositif de mise en oeuvre dudit procede
EP1676683A1 (fr) * 2004-12-28 2006-07-05 Nidek Co., Ltd. Dispositif d'usinage de verre de lunettes
US7437809B2 (en) 2004-12-28 2008-10-21 Nidek Co., Ltd. Eyeglass lens processing apparatus
FR2888765A1 (fr) * 2005-07-25 2007-01-26 Briot Internat Sa Procede d'etalonnage d'une machine de percage de verres optiques
WO2007012717A1 (fr) * 2005-07-25 2007-02-01 Briot International Procede d'etalonnage d'une machine de percage de verres optiques

Also Published As

Publication number Publication date
AU4137800A (en) 2000-11-21
ITRN990012A1 (it) 2000-11-06
ITRN990012A0 (it) 1999-05-06

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