EP2076358B1 - Vorrichtung zur bearbeitung von brillengläsern mit mehreren auf einem ausrichtbaren modul positionierten maschinenwerkzeugen - Google Patents

Vorrichtung zur bearbeitung von brillengläsern mit mehreren auf einem ausrichtbaren modul positionierten maschinenwerkzeugen Download PDF

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Publication number
EP2076358B1
EP2076358B1 EP07858411A EP07858411A EP2076358B1 EP 2076358 B1 EP2076358 B1 EP 2076358B1 EP 07858411 A EP07858411 A EP 07858411A EP 07858411 A EP07858411 A EP 07858411A EP 2076358 B1 EP2076358 B1 EP 2076358B1
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EP
European Patent Office
Prior art keywords
axis
machining
lens
rotation
module
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Application number
EP07858411A
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English (en)
French (fr)
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EP2076358A1 (de
Inventor
Cédric LEMAIRE
Tony Michel
Gaël MAZOYER
André MENANT
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EssilorLuxottica SA
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Essilor International Compagnie Generale dOptique SA
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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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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
    • 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
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5104—Type of machine
    • Y10T29/5105—Drill press
    • Y10T29/5107—Drilling and other
    • 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
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5104—Type of machine
    • Y10T29/5109—Lathe
    • Y10T29/511—Grinding attachment
    • 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
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5104—Type of machine
    • Y10T29/5109—Lathe
    • Y10T29/5114—Lathe and tool

Definitions

  • the present invention generally relates to the field of eyewear and more specifically the mounting of ophthalmic lenses of a pair of corrective glasses on a spectacle frame.
  • a device for machining an ophthalmic lens comprising means for supporting and driving in rotation of the ophthalmic lens around a locking axis of this lens, a machining module that is orientable by relative to the support means and rotation drive of the lens and which is for this purpose able to pivot about an axis of orientation not parallel to the locking axis of the lens, and at least one piercing tool rotatably mounted on said machining module about a first axis of rotation.
  • various machining operations are performed one after the other on the lens. After an operation of projecting the lens for the shaping of its periphery, various operations are performed to finish the edge of the lens.
  • the finish comprises a beveling operation which consists in producing on the edge of the lens a bevel, that is to say a profiled peripheral ridge with a generally V-shaped section. to fit into the bezel of the corresponding circle of the frame for fixing the lens.
  • the finish comprises a drilling operation which consists in producing in the lens bores or notches on which the eyeglass frame will be fixed.
  • the finish includes a grooving operation which consists of producing on the edge of the lens a groove adapted to receive a thread for attaching the lens to the frame .
  • EP 1 807 244 an ophthalmic lens machining device adapted to perform all of these machining operations using different machining tools according to the preamble of claim 1.
  • This machining device comprises support shafts ophthalmic lens, a clipping and beveling wheel for the lens, and a finishing module.
  • the clamping shafts are carried by a pivotally movable rocker about an axis parallel to the axis of support of the lens.
  • the finishing module comprises a base movable pivotally about an axis parallel to the axis of support of the lens.
  • the base of the finishing module carries a train of rotary finishing grinders around an axis of rotation, as well as a mobile drill pivoting on the base around an axis transverse to the support axis of the lens.
  • This drill has a drill bit which is rotatably mounted about a second axis of rotation which, because of the mobility of the drill, is orientable relative to the lens.
  • the main disadvantage of such a machining device is that the drill string has many tools stacked on top of each other so that it has a large length of cantilever. During the machining of the lens, the bending forces on the drill string deform the latter and then make the machining of the ophthalmic lens imprecise.
  • this string of grinders has a large size and imposes, because of the stack of tools, a tedious maintenance.
  • the wheel train is rotated by a common motor, so it is necessary to change the rotational speed of the engine according to the tool used.
  • the motor is thus made to operate with an amplitude of rotational speeds corresponding to powers far from its nominal power curve. It is therefore necessary to use a powerful engine, so expensive and bulky.
  • the drill being movable relative to the finisher, it is mandatory to provide a motor for rotating the drill bit and a motor for rotating the string of grinders.
  • a motor for rotating the drill bit In addition to a high manufacturing cost, such architecture gives the finishing module a large footprint and weight.
  • the present invention proposes a new machining device which is less cumbersome, of easier maintenance and of increased precision, making it possible to pierce the lenses close to their support axes, and of which at least two tools of distinct axes are orientable with respect to The lens.
  • a machining device as defined in the introduction, in which at least one creasing and / or grinding tool rotatably mounted on said module is provided on the one hand.
  • machining about a second axis of rotation distinct from and fixed relative to the first axis of rotation, and secondly, a geared motor unit which comprises a single motor and which is adapted to drive in rotation at speeds different said creasing and / or grinding tool and said piercing tool.
  • drilling tool is meant any type of tool capable of drilling a hole in the ophthalmic lens.
  • the drilling tool may comprise a drill made of a material capable of piercing the lenses of glass, polycarbonate and plastic.
  • creasing tool and / or grinding means any type of tool capable of making a groove on the edge of a lens and / or machining the edge of this lens.
  • the creasing tool can conventionally comprise a flange-shaped grinding wheel. It may alternatively comprise a small-diameter bur which, used orthogonally with respect to the edge of the lens, makes it possible to machine with its free end a groove along the edge of the lens.
  • the grinding tool can include any type of grinding wheels or grinders, milling cutters or knives, for cutting and / or beveling and / or polishing the edge of the lens.
  • a cutter used orthogonally with respect to the edge of the lens may also allow to cut and / or bevel the edge of the lens.
  • the machining tools of the ophthalmic lens are thus distributed on the machining module, individually or in groups, along different axes of rotation.
  • the length of each tool or group of tools is therefore reduced, so that the bending forces generate few machining inaccuracies.
  • the overall size of the machining device is decreased.
  • the machining tools are arranged on the steerable machining module allows to tilt these tools when they machine the lens so that they fit perfectly to the shape and configuration of the lens relative to the device.
  • the arrangement of the drilling tool on an axis of rotation distinct from the axis of the creasing and / or grinding tool makes it possible for this drilling tool to have a reduced overall diameter. As a result, it can be approached by the lens support means so as to pierce the lens at a very small distance from the support axis of the lens.
  • a single motor housed in the machining module rotates each machining tool of the module at a specific rotational speed which is its nominal rotational speed for which it was designed and which corresponds to the type machining he must perform.
  • each machining tool is made of a clean material, has a diameter different from those of other tools and is adapted to achieve a type of machining different from those of other tools.
  • the reduction ratio specific to each tool or group of machining tools (which may be greater than or less than 1) makes it possible to adapt the speed of rotation of the tool to the machining it must perform. This ratio of reducing the speed of the engine also makes it possible to make the most of the power of the engine and thus to use a limited power motor (thus inexpensive and compact).
  • the distance between said axis of orientation and said first axis of rotation is less than 40 millimeters.
  • the machining device comprising a cutting wheel rotatably mounted about a transfer axis, the direction of the locking pin is fixed with respect to the transfer axis and the direction of the machining module is variable with respect to the transfer axis.
  • the axes of rotation of the creasing and / or grinding and drilling tools of the machining module are parallel to one another.
  • the machining module comprises a mobility transverse to the blocking axis and an axial translational mobility with respect to the means for supporting and rotating the lens along an axis of rotation. transfer parallel to said locking pin.
  • the machining device comprises a base on which said machining module is mounted to pivot about the axis of orientation and which is adapted to translate relative to the means for supporting and driving in rotation of the lens along said transfer axis and to pivot about said transfer axis to provide the machining module its transverse and axial mobility.
  • the machining device comprises means for actuating the machining module which are arranged to adjust the orientation of the machining module around the axis of orientation in favor of of its axial mobility and which are engageable and disengageable thanks to its transversal mobility.
  • the machining module is devoid of electromechanical means of clean operation for adjusting its orientation. For this purpose, it is only provided with mechanical means, such as a lever adapted to cooperate with a fixed part of the device. This cooperation can then take place when the base of the machining module takes, by means of its transverse and axial mobility, a predetermined engagement position.
  • the drilling tool is the only machining tool rotatably mounted about its axis of rotation and is located on an edge of the machining module so that there is at least one position of the machining module in which the distance between the first axis of rotation and the blocking axis is less than the sum of the radius of the creasing and / or grinding tool and the radius of the support and rotational driving means of the lens.
  • this difference is less than the sum of the radius of the smallest creasing and grinding tools and the radius of the support shafts and rotational drive of the lens. It would therefore not be possible to approach the drill bit of the center of the lens so much if the drill bit was mounted on an axis of rotation common to one of the creasing and grinding tools.
  • the electronic and computer device 100 comprises data acquisition means 101 constituted here by a keyboard, information means 102 constituted by a screen and control means able to control the different degrees of freedom of the grinder 2.
  • the grinder 2 comprises, in this case, a rocker 4, which is mounted freely pivotally about an axis of rocker A4, here horizontal, on a frame 3.
  • the rocker 4 is equipped with support means and rotational drive 11, 12 consist of two trees of small diameter (about equal to 14 millimeters) able to take the vise lens to block it.
  • These two shafts 11, 12 are aligned with each other along a blocking axis A1 parallel to the flip-flop axis A4.
  • the two shafts 11, 12 are synchronously rotated synchronously by a motor (not shown), via a common drive mechanism (not shown) embedded on the rocker 4.
  • This common synchronous rotation drive mechanism is of the type current, known in itself.
  • the rotation ROT of the shafts 11, 12 is controlled by the electronic and computer device 100.
  • Each of the shafts 11, 12 has a free end which faces the other and which is equipped with a locking nose 13, 14.
  • the two locking noses 13, 14 are generally of revolution around the locking pin A1 and each have an application face arranged to bear against the corresponding optical face of the ophthalmic lens to be machined.
  • the shaft 11 is movable in translation along the blocking axis A1, facing the other shaft 12, to effect clamping in axial compression of the lens between the two locking noses 13, 14.
  • the shaft 11 is controlled for this axial translation by a drive motor via an actuating mechanism (not shown) controlled by the electronic and computer device 100.
  • the other shaft 12 is fixed in translation along the blocking axis A1.
  • the machining device 1 comprises, on the other hand, a set of wheels for the edging and possibly the trimming of the lens.
  • This set of grinding wheels comprises a cutting and beveling grinding wheel 20, which is rotatably locked on a transfer axis A2 parallel to the locking pin A1 and which is also rotated by a specific motor.
  • This grinding wheel and bevelling 20 has a peripheral portion 21 which is generally cylindrical about the transfer axis A2 and which carries two bevelling grooves 22, 23 of V-profiles.
  • the grinding wheel is attached to a common shaft A2 axis ensuring its rotational drive during the operation of edging and beveling of the ophthalmic lens.
  • This common shaft which is not visible in the figures, is controlled in rotation by an electric motor 24 driven by the electronic and computer device 100.
  • the wheel train is also axially movable in translation along the axis A2 and is controlled in this translation by a controlled motorization.
  • the set of wheels, its shaft and its motor is carried by a carriage 25 which is itself mounted on slides 26 secured to the frame 3 to slide along the transfer axis A2.
  • the axial mobility movement of the carriage 25 is called "transfer” and is noted TRA on the figure 1 . This transfer is controlled by the electronic and computer device 100.
  • the pivoting capacity of the rocker 4 is used around the rocker axis A4. This pivoting causes indeed a displacement, here substantially vertical, the ophthalmic lens sandwiched between the shafts 11, 12 which brings the lens closer to the grinding wheel 20.
  • This mobility which allows to restore the desired beveling shape and programmed in the electronic and computer device 100, is called restitution and is noted RES on the figure 1 .
  • This mobility is implemented using a screw-nut system.
  • This system comprises, on the one hand, a rendering motor 15 integral with the frame 3 which drives in rotation a threaded rod 16 with a restitution axis A3 perpendicular to the locking pin A1, and, on the other hand, a nut 17 which cooperates with this threaded rod 16 and which is integral with the rocker 4.
  • the rotation of the rendering motor 15 then makes it possible to raise or lower the nut 17 along the threaded rod 16 in order to change the distance between the A2 transfer axis of the trimming and beveling wheel 20 and the locking pin A1.
  • the rendering motor 15 conventionally comprises a rotor-stator assembly 18 housed inside a cylindrical cover 19.
  • This rendering motor 15 is designed to be insensitive to temperature variations.
  • stator rotor assembly is attached to a flange 18A which is connected to the threaded rod 16.
  • the cylindrical cap 19 comprises meanwhile three coaxial cylindrical bells threaded one inside the other.
  • the outer cylindrical bell 19A is fixed, on its low end side, to the frame 3 of the grinder 2.
  • the inner cylindrical bell 19C is fixed on the side of its upper end to the flange 18A.
  • the intermediate cylindrical bell 19B is fixed, at its upper end, to the upper end of the outer cylindrical bell 19A and, at its lower end, to the lower end of the inner cylindrical bell 19C.
  • Each of these three cylindrical bells is made of a material different from that of the other bells, each material having a coefficient of proper expansion.
  • the threaded rod 16 which is made of steel, also extends. The materials and dimensions of the three bells are chosen so that these dilations (including the average useful expansion of the rod) compensate for each other, thus preventing the flange 18A and the threaded rod 16 from generating unwanted thermal dispersions, which would lead to errors. for the machining of ophthalmic lenses.
  • the grinder illustrated by the figure 1 further comprises a machining arm 30 provided, on the one hand, with a machining module 35 which carries additional machining tools 50, 60, 70, 80, 90 ( figure 6 ) for the trimming and finishing of the ophthalmic lens, and, secondly, a base 31 which connects the machining module 35 to the frame 3 of the grinder 2.
  • this machining arm 30 has a degree of mobility, in a direction substantially transverse to the blocking axis A1 and to the axis of the restitution A3.
  • This degree of transverse mobility is called retraction and is noted ESC.
  • the retraction consists of a pivoting of the machining arm 30 about the transfer axis A2.
  • the machining module 35 has, thanks to the transfer mobilities TRA and retraction ESC of the machining arm 30, an adjustable position allowing the additional machining tools to be moved closer to or away from the lens blocked by the shafts. , 12 of the device.
  • the base 31 of the machining arm 30 is provided with a tubular sleeve 32 mounted on the carriage 25 to pivot about the transfer axis A2 and to translate with the carriage 25 along this axis A2 (TRA transfer mobility).
  • the tubular sleeve 32 is provided, at one of its ends, with a wheel 34 whose angular sector is toothed and meshes with a pinion (not visible in the figures) equipping the shaft.
  • an electric motor 27 integral with the carriage 25.
  • the machining module 35 is connected to the tubular sleeve 32 of the base 31 by means of a lever 33, which is fixed on the other end of the tubular sleeve 32, and a connecting piece 43.
  • this machining module 35 comprises a housing 36 which extends in length in an arc of a circle so as to match the shape of the cutting and beveling wheel 20 around which it pivots (ESC retraction).
  • This housing 36 comprises, at mid-length, a shaft (not visible) which extends along an axis of orientation A5 orthogonal to the transfer axis A2. Said shaft is inserted into a bushing 37 of corresponding shape belonging to the connecting piece 43. The shaft and the bushing then form a pivot connection axis A5, allowing the machining module 35 to pivot relative to the workpiece. link 43.
  • This orientation mobility of the machining module 35 around the axis A5 is noted ORI on the figures 2 and 4 .
  • braking means are here arranged inside the sleeve 37 and / or the shaft inserted into the socket. They may for example be made in the form of a brake comprising, on the one hand, a piston housed in an axial bore of the shaft so as to slide in this bore while being integral in rotation with the shaft, and, secondly, a return spring of the piston against the bottom of the sleeve 37.
  • the front face of the piston is here provided with a friction surface which, by rubbing against the bottom of the sleeve 37, can block the pivoting of the shaft in the sleeve 37.
  • the braking obtained must be sufficient to withstand the torque generated during the machining of the ophthalmic lens by one of the additional machining tools 50, 60, 70, 80, 90 carried by the machining module 35.
  • the piston is not disengageable and thus exerts its braking permanently.
  • controlled disengagement means for locking the pivoting of the machining module.
  • the housing 36 of the machining module 35 carries the additional machining tools 50, 60, 70, 80, 90 in its end zone closest to the shafts 11, 12 for supporting the lens.
  • the housing 36 carries five tools divided into three groups of one or two machining tools. Each group is adapted to rotate about an axis of rotation A6, A7, A8 distinct from the axes of rotation of the other groups of tools. These axes of rotation are here parallel to each other.
  • a first group disposed at the end of the housing 36 comprises a single drilling tool 50.
  • This drilling tool 50 conventionally comprises a drill 51 for drilling the ophthalmic lens held by a mandrel 52 and a clamping ring 53 of the mandrel 52. on the drill 51.
  • the mandrel 52 is adapted to rotate about an axis of rotation A6 orthogonal to the axis of orientation A5.
  • the axis of rotation A6 of the drilling tool 50 may be parallel or inclined with respect to the locking axis A1 of the lens ophthalmic.
  • the orientation of the machining module 35 thus makes it possible to incline the drill 51 relative to the ophthalmic lens, in order to pierce the latter according to the desired axis.
  • the drilling tool 50 is here arranged on the machining module 35 so that its axis of rotation A6 is remote from the axis of orientation A5 by a gap of less than 40 millimeters, preferably zero.
  • the machining module 35 pivots about its axis of orientation A5, the end of the drill 51 describes a circular arc around the axis of orientation A5, of small radius.
  • the implementation of the machining tool facing the lens is therefore achieved with a reduced travel of the drill, so that it is fast, and accurate.
  • the drilling tool 50 is alone on its axis of rotation and the mandrel 52 and the clamping ring 53 have reduced diameters, of the order of 8 millimeters.
  • this drilling tool 50 is located at the end of the machining module 35, so that the edge of the mandrel is flush with the end of the machining module.
  • the distance between the axis of rotation A6 of the piercing tool and the locking axis A1 of the lens is approximately equal to 11 millimeters.
  • the piercing tool 50 can be brought very close to the support and rotation drive shafts 11, 12 of the lens in order to pierce the latter near its locking pin A1. It is thus possible to pierce the lenses of small dimensions.
  • a second group of machining tools comprises a stack of two separate tools, namely a grooving crease 60 and a milling tool 70 of diameter less than one centimeter, here equal to 5 millimeters. These two tools are adapted to rotate around the same axis of rotation A7.
  • the milling tool 70 conventionally comprises a slender bur 71 of small diameter which is adapted to pierce and slice the ophthalmic lens in its thickness to cut it in a desired contour. It is held by a mandrel 72 and a clamping ring 73 of the mandrel 72 on the cutter 71.
  • the machining module 35 can pivot about the axis A5 between two extreme angular positions angularly separated by a restricted angle (approximately equal to 30 degrees). In a variant not shown of the invention, it can be provided that these two extreme angular positions are angularly separated by an angle of about 90 degrees.
  • the cutter 71 can be brought under the edge of the lens to be machined, vertically, parallel to the axis A3. Its free end can thus be brought opposite the edge of the lens.
  • This position of the cutter (radially with respect to the axis of the lens) can thus make it possible to create a groove or an engagement rib (bevel) along the edge of the lens, by pivoting it around its axis.
  • provision may be made to arrange the cutter on the machining module 35 so that its axis of rotation A7 extends parallel to the axis of orientation A5. In this way, the free end of the cutter can also be used to make a groove or a nesting rib along the edge of the lens.
  • Grooving wheel 60 generally has a disc shape pierced with a central opening engaged on the mandrel 72 of the milling and routing tool 70.
  • the grinder 60 is rotationally integral with this mandrel 72 and has two concentric portions of low thicknesses.
  • the central portion 61 has the shape of a disc whose two faces extend orthogonally to the axis of rotation A7.
  • the peripheral portion 62 extends in the continuity of the central portion 61 but has a slightly conical shape. The periphery of this tool is adapted to make a groove on the edge of the ophthalmic lens.
  • This deburring is conventionally performed by machining one or more facets on the rear face of the lens, in planes substantially orthogonal to the blocking axis A1. Since the peripheral portion 62 of the tool is conical, the ORI orientation mobility is used to tilt the tool so that it deburrs the lens in a vertical plane (orthogonal to the blocking axis A1).
  • a third group of tools 98 machining also comprises a stack of two separate tools, namely a grinding fin 80 and a grinding polishing 90. These two tools are adapted to rotate about the same axis of rotation A8. This axis A8 is disposed between the two axes of rotation A6, A7 of the two other groups of tools.
  • the third group of machining tools 98 is set back from the other groups of tools so that the lens can be brought into contact with each of the tools of the machining module 35 without the risk of interfering with another of the tools. of the module.
  • the axes of rotation A7 and A8 of the second and third groups of tools are also arranged at a short distance from the axis of orientation A5 (less than 40 millimeters), so that the pivoting of the finishing module 35 causes a movement of each machining tool of low clearance.
  • Each of the three groups of machining tools is mounted on a drive shaft guided in rotation by a sliding bearing disposed in the housing 36 of the machining module 35.
  • the machining tools 50, 60, 70, 80, 90 are all rotated by a geared motor assembly 38, 39 which comprises a single electric motor 38.
  • This motor 38 comprises an output shaft to which is fixed a gear 39A.
  • the latter meshes with other gears 39 of different diameters, which makes it possible in particular to rotate at different speeds the gears 39B, 39C, 39D linked to the drive shafts of the machining tool groups.
  • the gears 39 of the geared motor assembly 38, 39 are all housed inside the housing 36 which is closed by a cover.
  • the reduction ratios of the geared motor assembly 38, 39 are each of the machining tools rotates approximately at its nominal operating speed (set by the tool manufacturer according to its shape, the material that composes it and the type of machining it performs) when the engine develops its maximum power.
  • the torque that can develop each machining tool when machining the lens is thus maximum relative to the power of the engine.
  • the machining device 1 comprises means for actuating the machining module 35 for adjusting its orientation around the axis of orientation A5.
  • actuating means are only mechanical. They are designed to exploit the existing mobility controls, without any other electromechanical mechanism of the machining device 1 being dedicated to this adjustment.
  • adjustment rod 40 which is fixed to the casing 36, on the side of its end opposite to the machining tools 50, 60, 70, 80, 90, and which extends longitudinally in the extension of the arc of a circle. formed by the housing, along an axis perpendicular to the axis of orientation A5.
  • the free end of this adjustment rod 40 is provided with a finger 41 of axis parallel to the axis of orientation A5.
  • This finger 41 is formed of two studs which each extend on one side or the other of the adjustment rod 40.
  • machining module 35 When the machining module 35 pivots about the axis A5, one of the studs of the finger 41 slides along a guide groove 42 in an arc formed in the connecting piece 43.
  • This guide groove 42 makes it possible to stiffen the pivoting shaft-bushing connection of the machining module 35 around the axis A5. It extends over a limited angular sector, typically between 15 and 40 degrees, here of the order of 30 degrees.
  • the machining module 35 can therefore take a plurality of angular positions around the axis A5 limited between two extreme angular positions.
  • the machining module 35 is shown on the figure 2 in one of these extreme angular positions and, on the figure 4 in the other of these extreme angular positions.
  • the control of the ORI orientation mobility of the machining module 35 is achieved by optimizing the use of the existing machining mobility degrees on the grinder 2.
  • the machining arm 30 may also have an additional position in which it is very far from the shafts 11, 12, so that the finger 41 of its adjustment rod 40 ( figure 5 ) is engaged between the branches 46, 47 of the adjustment support 44.
  • the machining arm 30 is controlled in translation along the transfer axis A2 (transfer TRA) so that, the finger being held laterally in the direction of the axis A2, the module machining 35 of the machining arm 30 moves relative to the finger 41 which remains locked. This relative movement causes the finger 41 to slide along the guiding groove 42.
  • the control of the translation of the machining arm 30 along the transfer axis A2 thus makes it possible to adjust the orientation of the machining module 35 around of axis A5.
  • the grinder 2 of the machining device 1 further comprises means projecting a liquid on the edge of the lens blocked by the shafts 11, 12 when machined by one of the machining tools of the device.
  • This liquid can be refrigerant or heating. It is intended to maintain the ophthalmic lens at the temperature at which it will be used. More precisely, knowing that the future carrier of the lens lives in a country where the average temperature is known, the liquid maintains the temperature of the lens during its machining at this average temperature. Therefore, when this lens is mounted in a circle of a spectacle frame (advantageously metallic), in the country of the wearer, its dimensions correspond precisely to the expected dimensions and no dilation of the lens disturbs the interlocking.
  • the ophthalmic lens 200 has a convex front face 201 and a concave rear face 202.
  • the finishing grinder 80 has a cylindrical working face 81 and a conical working face 82 whose normal at a point on this face is directed away from the center of curvature of the lens 200.
  • the conical working faces 82 and cylindrical 81 of this rigid finishing wheel 80 are used to form the rear flank 243 and the rear leg 224 of a peripheral engagement ridge 240, commonly called bevel.
  • the polishing grinder 90 has a central cylindrical working face 91 and, on either side of this cylindrical working face 91, two opposite conical working faces 92, 93.
  • the conical working faces 92, 93 of this polishing wheel are used to make a polished chamfer on the edges of the front and rear faces of the lens.
  • the central cylindrical working face 91 makes it possible to polish the rear leg 224 of the peripheral engagement rib 240, which extends parallel to the axis A8 between the rear flank 243 of the rib and the rear face 202 of the lens.
  • the normal at a point of one of the conical working faces 93 is directed towards the center of curvature of the lens 200. This conical working face 93 is thus suitably oriented to machine if necessary the front face 201 of the lens.
  • the peripheral portion 221 of the front face 201 of the lens is machined by the conical working face 93 of the polishing grinder 90 so as to have an inclined facet 241 which forms the front flank 241 of the rib device 240.
  • the RES and ROT rotation mobilities of the lens, as well as the transfer mobility TRA of the polishing wheel 90, are controlled jointly by the electronic and computer device 100 to machine the peripheral portion 221 of the lens and thus form the sidewall. before 241 machined peripheral rib 240.
  • a discontinuity 242 of the second order is formed on the peripheral portion 221 of the front face 201 of the lens a discontinuity 242 of the second order.
  • the peripheral portion 221 of the front face 201 of the lens is thus ground to have a discontinuity of the second order, but with a continuity of first order, with the remainder of the front face 201.
  • continuity of first order it is understood that the ground peripheral portion of the front face of the lens has a common edge with the unmilled rest of the front face.
  • second-order discontinuity is meant a slope break between the ground peripheral portion of the front face of the lens and the unmolded remainder of the front face. There is therefore no off-hook (or walk) in the direction of the axis of the lens between the front face of the lens and the leading edge of the interlocking rib.
  • the front flank 241 of the peripheral rib 240 thus has a planar face adapted to come into contact with the corresponding flat part of a bezel of a rim (a groove running through the inside of a rimmed eyeglass frame). .
  • the peripheral ridge of the lens is then nested in the bezel of the circle more reliably and accurately.
  • the conical front flank 141 of the peripheral rib 140 is adapted to suitably come into contact with the bezel.
  • the lens is slightly advanced relative to the corresponding circle in which it is mounted, that is to say that the lens is away from the lens. eye, which makes mounting more aesthetic.
  • the orientation mobility ORI of the machining module 35 can be controlled so as to obtain the desired inclination of the leading edge 241 of the peripheral rib on the lens 200.

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

Claims (11)

  1. Bearbeitungsvorrichtung für ein Brillenglas, die Halte- und Drehantriebsmittel (11, 12) für das Brillenglas um eine Einspannachse (A1) dieses Brillenglases, ein in Bezug zu den Halte- und Drehantriebsmitteln (11, 12) des Brillenglases ausrichtbares Bearbeitungsmodul (35), das zu diesem Zweck um eine zur Einspannachse (A1) des Brillenglases nicht parallele Ausrichtachse (A5) geschwenkt werden kann, sowie mindestens ein Bohrwerkzeug (50) umfasst, das um eine erste Drehachse (A6) drehbar an diesem Bearbeitungsmodul (35) montiert ist, dadurch gekennzeichnet, dass sie zum einen mindestens ein Werkzeug zum Nuten und/oder Abschleifen (60, 70) umfasst, das um eine zweite Drehachse (A7) drehbar an diesem Bearbeitungsmodul (35) montiert ist, wobei sich die zweite von der ersten Drehachse (A6) unterscheidet und in Bezug zu ihr fest stehend ist, sowie zum anderen eine Getriebemotoreinheit (38, 39), die einen einzigen Motor umfasst und sich für den Drehantrieb in mehreren Geschwindigkeiten des Werkzeuges zum Nuten und/oder Abschleifen (60,70) und des Bohrwerkzeuges (50) eignet.
  2. Vorrichtung nach dem vorausgehenden Anspruch, bei der der Abstand zwischen der Ausrichtachse (A5) und der ersten Drehachse (A6) unter 40 Millimeter beträgt.
  3. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der bei einer Bearbeitungsvorrichtung (1) mit einer drehbar um eine Transferachse (A2) montierten Zuschneide- und Schleifmaschine (20) die Richtung der Einspannachse (A1) in Bezug zur Transferachse (A2) fest und die Richtung des Bearbeitungsmoduls (35) in Bezug zur Transferachse (A2) variabel ist.
  4. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der die Drehachsen (A6, A7) der Werkzeuge zum Nuten und/oder Abschleifen und zum Bohren (50, 60, 70) des Bearbeitungsmoduls (35) zueinander parallel sind.
  5. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der das Bearbeitungsmodul (35) eine zur Einspannachse (A1) transversale Mobilität (ESC) und eine zu den Halte- und Drehantriebsmitteln (11, 12) des Brillenglases axiale Translationsmobilität (TRA) entlang einer zur Einspannachse (A1) parallelen Transferachse (A2) aufweist.
  6. Vorrichtung nach vorausgehendem Anspruch mit einem Sockel (31), auf dem das Bearbeitungsmodul (35) um die Ausrichtachse (A5) schwenkbar montiert ist und der sich in Bezug zu den Halte- und Drehantriebsmitteln (11, 12) des Brillenglases entlang der Transferachse (A2) verschieben lässt und sich um die Transferachse (A2) drehen kann, um dem Bearbeitungsmodul (35) seine transversale (ESC) und axiale (TRA) Mobilität zu verleihen.
  7. Vorrichtung nach einem der zwei vorausgehenden Ansprüche mit Betätigungsmitteln (40,44) für das Bearbeitungsmodul (35), die zum Einstellen der Ausrichtung (ORI) des Bearbeitungsmoduls (35) um die Ausrichtachse (A5) für seine axiale Mobilität (TRA) angeordnet sind und für seine transversale Mobilität (ESC) ein- und ausgeschaltet werden können.
  8. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der das Bearbeitungsmodul (35) höchstens zwei Bearbeitungswerkzeuge (50, 60, 70, 80, 90) umfasst, die um dieselbe Drehachse (A6, A7, A8) drehbar montiert sind.
  9. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der das Bohrwerkzeug (50) das einzige um die erste Drehachse (A6) drehbar montierte Bearbeitungswerkzeug ist und sich derart an einem Rand des Bearbeitungsmoduls (35) befindet, dass es mindestens eine Position des Bearbeitungsmoduls (35) gibt, in der die Abweichung zwischen der ersten Drehachse (A6) und der Einspannachse (A1) kleiner ist als die Summe des Radius des Werkzeugs zum Nuten und/oder Abschleifen (60, 70) und des Radius der Halte- und Drehantriebsmittel (11, 12) des Brillenglases.
  10. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der das Bearbeitungsmodul (35) einen Nutenschleifkopf (60) und ein Fräswerkzeug (70) mit einem Durchmesser von unter einem Zentimeter umfasst, die um dieselbe Drehachse (A7) drehbar montiert sind.
  11. Vorrichtung nach einem der vorausgehenden Ansprüche, bei der das Bearbeitungsmodul (35) einen starren Schleifkopf für das Endschleifen (80) und einen weichen Polierkopf (90) umfasst, die um dieselbe Drehachse (A8) drehbar montiert sind.
EP07858411A 2006-10-10 2007-10-09 Vorrichtung zur bearbeitung von brillengläsern mit mehreren auf einem ausrichtbaren modul positionierten maschinenwerkzeugen Active EP2076358B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0608864A FR2906746B1 (fr) 2006-10-10 2006-10-10 Dispositif d'usinage de lentilles ophtalmiques comprenant une pluralite d'outils d'usinage disposes sur un module orientable
PCT/FR2007/001642 WO2008043910A1 (fr) 2006-10-10 2007-10-09 Dispositif d'usinage de lentilles ophtalmiques comprenant une pluralité d'outil d'usinage disposés sur un module orientable

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FR2912335B1 (fr) * 2007-02-13 2009-04-17 Essilor Int Machine de detourage d'une lentille de lunettes,pourvue d'un porte-outils tournant sur lequel sont montes plusieurs outils de travail
KR101079037B1 (ko) * 2008-09-30 2011-11-02 주식회사 휴비츠 드릴링 장치를 구비한 안경렌즈 가공장치
FR2939914B1 (fr) * 2008-12-12 2010-12-24 Minima Dispositif de percage de verres optiques
FR2950163B1 (fr) 2009-09-15 2012-01-20 Essilor Int Procede et dispositif d'usinage d'une lentille ophtalmique en vue de son montage dans une monture de lunettes
CN102753316A (zh) * 2010-01-26 2012-10-24 朴荣根 凹槽加工装置、凹槽加工方法和板材加工装置
FR2958870B1 (fr) 2010-04-20 2012-04-20 Essilor Int Procede de detourage d'une lentille ophtalmique de lunettes
FR2962676B1 (fr) * 2010-07-13 2012-08-03 Essilor Int Procede de detourage d'une lentille ophtalmique de lunettes comportant un film de revetement.
US8944315B2 (en) * 2010-10-04 2015-02-03 Schneider Gmbh & Co. Kg Apparatus and method for working an optical lens and also an optical lens and a transporting container for optical lenses
FR2972382B1 (fr) * 2011-03-10 2013-04-26 Briot Int Machine de meulage de verres optiques et procede de meulage associe
JP5935407B2 (ja) 2012-03-09 2016-06-15 株式会社ニデック 眼鏡レンズ加工装置
FR3002871B1 (fr) * 2013-03-08 2015-03-13 Essilor Int Dispositif de detourage de lentilles ophtalmiques
JP6197406B2 (ja) * 2013-06-28 2017-09-20 株式会社ニデック 眼鏡レンズ加工装置、眼鏡レンズ加工プログラム
FR3008914B1 (fr) * 2013-07-26 2015-09-04 Essilor Int Procede et machine de gravure de lentilles optiques
JP6503837B2 (ja) * 2015-03-31 2019-04-24 株式会社ニデック 眼鏡レンズ加工装置
CN106002535B (zh) * 2015-03-31 2020-05-22 尼德克株式会社 眼镜镜片加工装置
JP6596878B2 (ja) * 2015-03-31 2019-10-30 株式会社ニデック 眼鏡レンズ加工装置、及び眼鏡レンズ加工プログラム
CN113118940B (zh) * 2021-04-25 2023-04-07 深圳市康视保眼镜有限公司 一种镜框自动打磨抛光装置及其使用方法
CN114029815B (zh) * 2021-11-24 2024-05-10 广州尚达光学科技有限公司 一种镜片注塑成型后精加工系统及精加工工艺

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FR2885063B1 (fr) * 2005-04-29 2007-07-06 Essilor Int Procede et dispositif de travail de la peripherie d'une lentille ophtalmique de lunettes

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WO2008043910A1 (fr) 2008-04-17
FR2906746A1 (fr) 2008-04-11
US20100093265A1 (en) 2010-04-15
FR2906746B1 (fr) 2009-05-22
US8342909B2 (en) 2013-01-01
EP2076358A1 (de) 2009-07-08

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