EP2964423B1 - Vorrichtung zum schneiden einer ophthalmischen linse - Google Patents

Vorrichtung zum schneiden einer ophthalmischen linse Download PDF

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Publication number
EP2964423B1
EP2964423B1 EP14713184.1A EP14713184A EP2964423B1 EP 2964423 B1 EP2964423 B1 EP 2964423B1 EP 14713184 A EP14713184 A EP 14713184A EP 2964423 B1 EP2964423 B1 EP 2964423B1
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EP
European Patent Office
Prior art keywords
mobility
axis
blocking
ophthalmic lens
tool holder
Prior art date
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Active
Application number
EP14713184.1A
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English (en)
French (fr)
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EP2964423A1 (de
Inventor
Michel Nauche
Laurent Geysels
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique SA
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Publication of EP2964423A1 publication Critical patent/EP2964423A1/de
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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
    • B24B9/148—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 electrically, e.g. numerically, controlled
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B24B47/225—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation for bevelling optical work, e.g. lenses
    • 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 present invention relates generally to the trimming of an ophthalmic lens with a view to its mounting on a spectacle frame.
  • It also relates to a method of using such a trimming device.
  • the trimming device described in this document comprises a train of grinding wheels for roughing and bevelling the lens as well as two probe rods respectively adapted to come into contact with the front and rear optical faces of the lens in order to measure the geometry thereof. .
  • the wheel train and the two probe rods are therefore each equipped with their own motorization and measuring means.
  • the tool holder of the trimming device comprises a support flanked, on one side, by a creasing wheel (the “first tool”) and, on the other, by a drill bit (the “Second tool”). These two finishing tools can then be selected by rotating the support 180 degrees around the pivot axis using its own motorization means.
  • a drawback of this device is that it comprises a large number of motorization means, to the detriment of its manufacturing and assembly cost as well as its bulk.
  • the major drawback of this device is that the tool holder has such a bulk that it does not allow the scoring wheel and the drill bit to be brought as close as desired to the clamping shafts of the ophthalmic lens. As a result, when the lens has a reduced height, it may prove to be impossible to groove the lens over its entire contour or to drill it, the tool holder coming into contact with the clamping shafts.
  • the Applicant has also found that, even though it would reduce the size of this tool holder, it would not be possible to bring the drill bit as close as desired to the lens clamping shafts. In fact, the diameter of the creasing wheel being greater than that of the drilling bit, it may happen that the creasing wheel comes into contact with the clamping shafts before the drilling bit reaches the desired position.
  • the present invention proposes a new trimming device, in which the first and second tools are positioned differently.
  • a trimming device as defined in claim 1 is proposed.
  • the first and second tools are positioned relative to each other in such a way that when a tool is selected to machine the lens, the other tool does not interfere with the shafts. clamping of the lens, which allows the lens to be machined as close as possible to its clamping shafts.
  • the tool holder also embeds means of measurement of the geometry of the ophthalmic lens
  • the control means are adapted to select the measuring means or one of said first and second tools, by controlling the pivoting mobility of the tool holder with respect to the locking means and d 'drive so as to place said measuring means or one of said first and second tools in position to measure or machine said ophthalmic lens.
  • the motorization means of the tool holder make it possible not only to position the tools facing the ophthalmic lens in order to contour it, but also to place the measuring means facing the lens in order to measure its geometry.
  • This architecture which reduces the number of engines used, therefore has the advantage of being less expensive and less bulky.
  • the invention also relates to a piloting method as defined in claims 13 and 14.
  • FIG. 1 there is shown very schematically a trimming device 1 according to the invention.
  • the trimming device according to the invention could be produced in the form of different cutting or material removal machines capable of modifying the initial outline of an ophthalmic lens L1 to adapt it to that of an entourage of a selected eyeglass frame.
  • the trimming device consists of an automatic grinder 1, commonly called digital.
  • the locking and rotation drive means 10 as well as the tool holder 50 are mounted on the upper frame 2, which facilitates access to these elements in order to install an ophthalmic lens to be cut out or to repair the grinder. .
  • the means for blocking and driving in rotation 10 of the ophthalmic lens L1 comprise a lever 11 which is mounted so as to be able to rotate on the upper frame 2 about a retraction axis A3 parallel to the blocking axis A1.
  • This mobility of the latch 11 is called retraction mobility ESC. It allows the ophthalmic lens L1 to be brought closer or further away from the tool holder 50.
  • the means for locking and driving in rotation 10 also comprise two shafts 12, 13 aligned with one another along the locking axis A1, and which are mounted to be movable in rotation around this locking axis A1.
  • This mobility of the shafts 12, 13 is called ENT training mobility. It makes it possible to present any point of the field of the ophthalmic lens L1 facing the tool holder 50.
  • a first of the two shafts 12 is fixed in translation along the locking axis A1 while the second of these two shafts 13 is on the contrary mounted movable in translation along the locking axis A1 relative to the first shaft 12.
  • This mobility of shaft 13 is called SER clamping mobility. It enables the tightening in axial compression and the blocking of the ophthalmic lens L1 between these two shafts 12, 13.
  • the architecture of the locking and rotation drive means 10 is as follows.
  • the upper frame 2 carries a main shaft 3, of axis coincident with the retraction axis A3, on which the rocker 11 is mounted.
  • this rocker 11 comprises two parallel pillars 14, 15, which are mounted so as to be able to rotate on the main shaft 3 around of the retraction axis A3, to achieve the ESC retraction mobility.
  • the two shafts 12, 13 are then mounted to be movable in rotation on these two pillars 14, 15 in order to achieve the drive mobility ENT in rotation of the lens around the locking axis A1.
  • These pillars 14, 15 internally house synchronized motorization means, to actuate this drive mobility ENT.
  • One of the two pillars 14, 15 is also slidably mounted on the main shaft 3 along the axis A3 to achieve the clamping mobility SER in axial compression of the ophthalmic lens L1 between the two shafts 12, 13.
  • a jack 16 is then provided between these two pillars 14, 15 to actuate this SER clamping mobility and to ensure perfect parallelism of the pillars 14, 15.
  • the rocker 11 is moreover flanked by a link 17, one end of which is fixed to one of the pillars 14 and the other end of which carries a threaded nut (not visible in the figures).
  • the threaded nut is articulated on the rod 17 to pivot about an axis A8 parallel to the locking axis A1. It is screwed into engagement with a threaded rod 5 which is driven in rotation by a motor 4.
  • This motor 4 is itself mounted so as to be able to rotate on the upper frame 2 around an axis A9 parallel to the locking axis. A1.
  • the tool holder 50 comprises a multifunction module 51 which is movably mounted on the upper frame 2 according to translational mobility and rotational mobility.
  • TRA transfer mobility allows the multifunction module 51 to move along a transfer axis A5 parallel to the locking axis A1 in order to adjust the axial position of the tool holder 50 along the axis locking A1.
  • PIV pivot mobility allows the multifunction module 51 to pivot about a pivot axis A4 perpendicular to the locking axis A1 in order to present one or other of its facing faces of the ophthalmic lens L1 held between the two shafts 12, 13.
  • the architecture of the tool holder 50 is as follows.
  • the upper frame 2 carries two shafts 8 with axes parallel to the transfer axis A5, on which is mounted a slide 90 which supports the multifunction module 51.
  • the multifunction module 51 of the tool holder 50 has a massive, generally parallelepipedal shape with an upper face turned towards the slide 90, an opposite lower face, and four side faces.
  • the slider 90 which here has a parallelepiped shape, has two through wells engaged on the two shafts 8 to achieve the mobility of the transfer TRA of the multifunction module 51 on the upper frame 2 along the transfer axis A5.
  • a motor 9A fixed to the upper frame 2 is provided to drive in rotation a screw-ball nut 9B which engages with a threaded bore provided in the slide 90, in order to activate this mobility of transfer TRA.
  • the multifunction module 51 protrudes from its upper face a shaft 52 which is engaged through a bore provided in the slide 90, to achieve the pivotal mobility PIV of the multifunction module 51 relative to the upper frame 2 around the pivot axis A4.
  • a motor 6 attached to the slider 90 rotates a worm 7 which engages a pinion 53 attached to the upper end of the shaft 52, in order to actuate this pivotal mobility PIV.
  • the multifunction module 51 of the tool holder 50 carries two tools 60, 80 and, here, means 70 for measuring the ophthalmic lens L1.
  • the first tool is here a grinding wheel 60 and the second tool is a finishing accessory 80.
  • the finishing accessory 80 has a maximum outside diameter D2 which is less than the maximum outside diameter D1 of the grinding wheel 60.
  • the grinding wheel 60 is rotatably mounted on the multifunction module 51 around an axis of rotation A2 which is distinct from the finishing axis A6 around which the finishing accessory 80 is rotatably mounted.
  • the projections P60, P80 of the working surfaces of the grinding wheel 60 and of the finishing accessory 80 in a projection plane orthogonal to the finishing axis A6 are at least partly disjoint.
  • the axes of rotation A2 and finishing A6 are parallel to each other and, as shown in the figure 6B , the projections P60, P80 of the working surfaces of these tools in the projection plane are entirely disjoint.
  • the projection P80 of the finishing accessory 80 could be partially covered by the projection P60 of the grinding wheel 60.
  • the diameters D1, D2 of the tools and the center distance E1 between the axes of rotation A2 and finishing A6 must be chosen in such a way that: D 1 ⁇ D 2 + 2 . E 1
  • the projections P60, P80 of the working surfaces of these tools in the projection plane are entirely disjoint. It could of course be otherwise, as long as the projection P80 of the finishing accessory 80 is only partially covered by the projection P60 of the grinding wheel 60.
  • the grinding wheel 60 does not cut the finishing axis A6.
  • the multifunction module 51 of the tool holder 50 only comprises a cylindrical grinding wheel 60.
  • the figure 5 it rather comprises a train of wheels 60 mounted coaxially on the same axis, each wheel being used for a specific machining operation of the ophthalmic lens L1.
  • This train of grinding wheels 60 is here mounted to pivot around the grinding wheel axis A2 (which is orthogonal to the pivot axis A4) and is properly driven in rotation around this axis by a motor 57 housed inside the multifunction module 51.
  • the train of grinding wheels 60 here comprises two roughing grinding wheels 61, 64 of the same cylindrical shape of revolution around the grinding wheel axis A2, which make it possible to roughen the ophthalmic lens L1, that is to say to bring back its contour initial circular to an intermediate contour close to the desired final contour.
  • These two roughing wheels 61, 64 have different grains, optimized for machining lenses made of different materials.
  • the train of wheels 60 here also includes at least one finishing wheel (for bevelling and / or polishing and / or grooving the lens).
  • Finishing wheels are distinguished from roughing wheels in particular by their grain (less than 100 microns), which is much smaller than that of roughing wheels (of the order of 150 to 500 microns).
  • More precisely here it comprises two beveling grindstones 62, 63, of the same shape of revolution around the grinding wheel axis A2, which each have a bevelling groove in the form of a dihedral. These two grinding wheels make it possible to produce a fitting rib (or “bevel”) along the edge of the lens, to allow it to fit into a circle of a rimmed spectacle frame. These two beveling wheels 62, 63 have different grains, optimized for machining lenses made of different materials.
  • the finishing accessory 80 is more precisely represented on the figure 4 .
  • a mandrel 84 which is mounted to pivot around the finishing axis A6 (orthogonal to the pivot axis A4) and which is duly driven in rotation by a motor 57 housed inside the multifunction module 51.
  • the finishing accessory 80 comprises in particular a chamfering grinder 83, a scoring grinder 82 and a drilling bit 81.
  • the chamfering wheel 83 has a central cylindrical part of revolution around the finishing axis A6, flanked by two tapered side parts also of revolution around the finishing axis A6. These tapered side parts are shaped to machine the sharp edges of the ophthalmic lens L1.
  • the creasing wheel 82 has a thin disc shape. It is shaped to make a fitting groove along the edge of the ophthalmic lens L1, to allow it to be fitted into an arch of a semi-rimmed spectacle frame.
  • the drill bit 81 is for its part suitable for making drill holes in the ophthalmic lens, to enable it to be mounted on a rimless spectacle frame.
  • the pivoting mobility PIV of the multifunction module 51 then makes it possible to incline these different tools 60, 81, 82, 83 with a variable angle relative to the ophthalmic lens L1, which in particular makes it possible to incline the interlocking rib along field of the lens or pierce the lens along an axis normal to the plane tangent to the front face of the lens at the piercing point.
  • the grinding wheel 60 and the finishing accessory 80 are driven in rotation around their axes of rotation A2 and of finishing A6 by the same and single motor 57, at different rotation speeds.
  • rotational speeds are chosen as a function in particular of the material of the lens L1 to be machined and of the material of the tool used for this purpose.
  • the motor 57 drives, on the one hand, the grinding wheel 60 by means of a first transmission mechanism 56, and, on the other hand, the finishing accessory 80 by means of a second transmission mechanism 58.
  • these are belt transmission mechanisms, but it could of course be otherwise. It could for example be a gear transmission mechanism.
  • While the first transmission mechanism 56 is a continuous torque transmission mechanism (ie non-disengageable), the second transmission mechanism 58 is a disengageable torque transmission mechanism.
  • the second transmission mechanism 58 includes a freewheel.
  • the motor 57 is controlled so that its output shaft rotates in a first direction and only rotates the grinding wheel ( figure 8A ).
  • the motor 57 is controlled so that its output shaft rotates in the opposite direction and drives the grinding wheel 60 and the finishing accessory 80 in rotation ( figure 8B ).
  • This inexpensive system is particularly reliable.
  • the measuring means 70 which make it possible to acquire the three-dimensional coordinates of points situated on at least one of the optical faces of the ophthalmic lens L1, are for their part more particularly represented on the diagram. figure 5 .
  • these measuring means are probing means, which are therefore adapted to come into contact with different points of the ophthalmic lens in order to record their three-dimensional coordinates.
  • these measuring means could be suitable for carrying out telemetry measurements on the ophthalmic lens L1, that is to say without contact, for example by laser telemetry.
  • these measuring means 70 here comprise a support rod 71 which extends lengthwise along an axis A7 parallel to the axes of rotation A2 and finishing A6, and which is equipped with a probe tip 72 adapted to bear against one or the other of the optical faces of the ophthalmic lens L1.
  • this probe tip 72 comprises this effect two identical nozzles 73, 74 which point in symmetrical directions with respect to the axis A7, forming an obtuse angle, and which are thus respectively arranged to feel one and the other of the two optical faces of the ophthalmic lens L1.
  • the support rod 71 is mounted quasi-fixed on the multifunction module 51 of the tool holder 50.
  • Return means 75 are provided on either side of the support rod 71 to return it to the neutral position.
  • a position sensor 76 located in front of the probe is provided. 'internal end of the support rod 71, capable of detecting any movement of this support rod 71.
  • this position sensor also makes it possible to determine the force applied by the feeler tip 72 to the ophthalmic lens L1.
  • the control means will be able to detect the contact of the feeler tip 72 on the ophthalmic lens L1.
  • these measuring means 70 are suitable for palpating the field of the ophthalmic lens L1, in order for example to determine the shape of the outline of this lens and the exact position of this outline with respect to the shafts 12, 13.
  • the support rod will be elongated along the axis A7, and will have an end bent with respect to this axis A7, preferably at an angle equal to 45 degrees.
  • the position sensor 76 will be able to detect contact of the feeler tip 72 both against one of the optical faces of the lens L1 and against the field of the lens L1.
  • the measuring means 70, the finishing accessory 80 and the train of grinding wheels 60 are distributed around the periphery of the multifunction module 51 of the tool holder 50.
  • the pivoting mobility PIV of the multifunction module 51 makes it possible to place, according to the angular position of this multifunction module 51 around the pivot axis A4, only one of these different elements 60, 70, 80 facing the lens ophthalmic L1 blocked between the two shafts 12, 13.
  • finishing accessory 80 and the train of grinding wheels 60 are in particular located opposite each other with respect to the pivot axis A4, on two opposite lateral faces of the multifunction module 51.
  • the means 70 are for their part located on a third lateral face of the multifunction module 51, between the finishing accessory 80 and the train of grinding wheels 60.
  • the control means are designed to control in position the various mobilities of the grinder 1.
  • these control means are in particular arranged to select the measuring means 70 or the finishing accessory 80 or the train of grinding wheels 60 by means of the pivoting PIV of the tool holder 50.
  • the pivoting mobility PIV is controlled by the control means to place the 'probe tip 72 or the finishing accessory 80 or the train of grinding wheels 60 facing the lens so that the latter can perform its machining or measuring function.
  • the control unit also comprises acquisition means making it possible to record the positions of the various mobile components of the grinder 1. These acquisition means also make it possible to record the value of the force exerted by the probe tip 72 on the L1 ophthalmic lens.
  • the grinder 1 finally comprises a Man-Machine interface which here comprises a touch screen.
  • This Human-Machine interface allows the user to enter numerical values on the screen to control the grinder 1 accordingly.
  • control means make it possible, under the control of the optician, to carry out four blocking, probing, roughing and finishing operations of the ophthalmic lens L1.
  • the optician takes an ophthalmic lens L1 equipped with a blocking accessory, then engages it between the two shafts 12, 13 of the grinder 1, taking care to correctly place said locking accessory against the nose of one of the two shafts 12, 13. It then controls, thanks to the touch screen which it has at its disposal, the axial clamping of the lens.
  • the locking accessory makes it possible to precisely position the ophthalmic lens L1 between the two arms 12, 13, so that the control unit of the grinder 1 can know the exact position of this lens.
  • the control unit can thus precisely determine the position of the final contour according to which the lens must be cropped, in the frame of reference of the grinder 1.
  • the probing operation then consists in successively feeling the two optical faces of the ophthalmic lens L1 along the final contour, using the two nozzles 73, 74 of the probe tip 72.
  • control unit selects a first nose 73 of the probe tip 72 by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this first nose 73 at the height of a first of the optical faces of the ophthalmic lens L1.
  • control unit detects the three-dimensional coordinates of a plurality of points characteristic of the shape of the projection of the final contour on the first optical face of the lens.
  • the control unit selects the second nose 74 of the probe tip 72 by controlling the pivoting mobility PIV (over approximately 180 degrees) and the translational mobility TRA of the multifunction module 51, so as to place this second nose 74 facing the second optical face of the ophthalmic lens L1.
  • one or the other of the two roughing wheels 61, 64 is used, depending on the material of the lens to be trimmed, in order to roughly reduce the outline of the lens to a intermediate shape which is close to but distinct from that of the desired final contour.
  • control unit selects the roughing wheel 61, 64 by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this roughing wheel 61, 64 facing the field of the L1 ophthalmic lens.
  • the finishing operations can be carried out in different ways, depending on whether the ophthalmic lens L1 is intended to be mounted on a rimless, semi-rimless or rimless spectacle frame.
  • the finishing operation then consists, during a first step, in machining a nesting rib along the lens field, then, during a second step, in chamfering the two sharp cutting edges of the lens.
  • one or the other of the two beveling wheels 62, 63 is used, depending on the material of the lens to be cut.
  • control unit selects the beveling wheel 62, 63 for this purpose by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this beveling wheel 62, 63 opposite the field of the ophthalmic lens L1.
  • the chamfering wheel 83 is used.
  • control unit selects one of the two conical parts of the chamfering wheel 83 by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this conical part of the grinding wheel.
  • chamfering 83 facing one of the two sharp edges of the ophthalmic lens L1.
  • the control unit selects the other of the two conical parts of the chamfering wheel 83 by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this other conical part of the grinding wheel.
  • chamfering 83 opposite the other of the sharp edges of the ophthalmic lens L1.
  • the ophthalmic lens is ready to be mounted in one of the surrounds of the selected rimmed spectacle frame.
  • the ophthalmic lens L1 is intended to be mounted on a spectacle frame without a rim.
  • the finishing operation then consists, during a first step, in precisely machining the outline of the lens to the desired shape, then, during a second step, in chamfering the two sharp cutting edges of the lens, and finally, during a third step, to pierce the lens.
  • the cylindrical areas of one or the other of the two beveling wheels 62, 63 are used, depending on the material of the lens to be cropped.
  • control unit selects the bevel grinding wheel 62, 63 by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place one of the cylindrical zones of this beveling grinding wheel 62 , 63 facing the field of the ophthalmic lens L1.
  • the control unit would then select this ice grinding wheel by controlling the pivoting mobility and the translational mobility of the multifunction module, so as to place it opposite the field of the ophthalmic lens in order to use it.
  • the control unit then controls the retraction ESC and drive ENT movements to jointly rotate the lever 11 and the shafts 12, 13 so as to precisely machine the lens to the shape of the desired contour.
  • the second chamfering step is implemented in the same way as for an ophthalmic lens intended to be mounted on a rimmed spectacle frame. It will therefore not be redescribed here.
  • the drill bit 81 is used.
  • the control unit selects this drilling bit 81 by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this drill opposite a drilling point previously identified on the front face. of the L1 ophthalmic lens.
  • the ophthalmic lens is thus ready to be mounted on the lugs of the spectacle frame without the selected rim.
  • the finishing operation then consists, during a first step, in precisely machining the outline of the lens to the desired shape, then, during a second step, in scoring the field of the lens, and finally, in a third step, chamfering the two sharp cutting edges of the lens.
  • the first and third steps will then be implemented in the same way as for an ophthalmic lens intended to be mounted on a spectacle frame without a circle. They will therefore not be redescribed here.
  • the scoring grinder 82 is used so that a recessed interlocking groove can be machined along the field of the lens.
  • control unit selects the creasing wheel 82 for this purpose by controlling the pivoting mobility PIV and the translational mobility TRA of the multifunction module 51, so as to place this creasing wheel 82 opposite the field of the lens ophthalmic L1.
  • the ophthalmic lens is ready to be engaged against one of the arches of the selected semi-rimmed spectacle frame, before being held against it by a nylon thread provided for this purpose.
  • the ophthalmic lens L1 is extracted from the shafts 12, 13 of the grinder 1 using the SER clamping mobility which makes it possible to separate the two shafts 12, 13 l ' one another.
  • the grinder could have a different shape.
  • the pivot axis (A4) of the tool holder is, not orthogonal, but inclined relative to the locking axis (A1).

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

Claims (14)

  1. Vorrichtung zum Randbearbeitung (1) einer ophthalmischen Linse (L1), die in einer Brillenfassung angebracht werden soll, umfassend:
    - Mittel zur Arretierung und zum Drehantrieb (10) der ophthalmischen Linse (L1) um eine Arretierachse (A1),
    - einen Werkzeugträger (50), welcher ein erstes Werkzeug (60), das um eine Drehachse (A2) drehbar ist, und ein zweites Werkzeug (80), das um eine von der Drehachse (A2) verschiedene Feinbearbeitungsachse (A6) drehbar ist, trägt, wobei der Werkzeugträger (50) in Bezug auf die Arretierungs- und Antriebsmittel (10) gemäß drei Beweglichkeiten beweglich ist, nämlich:
    - einer Abstandsbeweglichkeit (RES) zum Verstellen des radialen Abstands des ersten und zweiten Werkzeugs (60, 80) von der Arretierachse (A1),
    - einer Verschiebungsbeweglichkeit (TRA) zum Verstellen der axialen Position des ersten und zweiten Werkzeugs (60, 80) in Bezug auf die Arretierungs- und Antriebsmittel (10) entlang der Arretierachse (A1), und
    - einer Schwenkungsbeweglichkeit (PIV) um eine quer oder orthogonal zur Arretierachse (A1) verlaufende Schwenkachse (A4) zum Verstellen der Ausrichtung der Drehachse (A2) und der Feinbearbeitungsachse (A6) in Bezug auf die Arretierachse (A1), und
    - Mittel zur Steuerung der drei Beweglichkeiten des Werkzeugträgers (50) in Bezug auf die Arretierungs- und Antriebsmittel (10),
    dadurch gekennzeichnet, dass das erste Werkzeug (60) wenigstens eine Schleifscheibe für Rohlinge (61, 64) umfasst.
  2. Vorrichtung zum Randbearbeitung (1) nach dem vorhergehenden Anspruch, wobei das erste Werkzeug (60) einen Außendurchmesser (D1) aufweist, der größer als der Außendurchmesser (D2) des zweiten Werkzeugs (80) ist, wobei die Projektionen der Arbeitsflächen des ersten und zweiten Werkzeugs (60, 80) auf eine zur Feinbearbeitungsachse (A6) orthogonale Ebene wenigstens teilweise disjunkt sind.
  3. Vorrichtung zum Randbearbeitung (1) nach einem der Ansprüche 1 und 2, wobei die Drehachse (A2) und die Feinbearbeitungsachse (A6) zueinander parallel sind.
  4. Vorrichtung zum Randbearbeitung (1) nach einem der Ansprüche 1 und 2, wobei die Drehachse (A2) und die Feinbearbeitungsachse (A6) relativ zueinander geneigt sind.
  5. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei das erste und das zweite Werkzeug (60, 80) um die Drehachse (A2) bzw. die Feinbearbeitungsachse (A6) von einem einzigen Motor mit unterschiedlichen Drehzahlen drehend angetrieben werden.
  6. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei das erste Werkzeug (60) wenigstens eine Feinbearbeitungsschleifscheibe (62, 63) umfasst.
  7. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei das zweite Werkzeug (80) eine Rillenschleifscheibe (82) und/oder eine Fasenschleifscheibe und/oder einen Bohrer (81) und/oder einen Schneidfräser umfasst.
  8. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei der Werkzeugträger (50) und die Arretierungs- und Antriebsmittel (10) beweglich auf ein und demselben Gestellelement (2) angebracht sind.
  9. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei die Abstandsbeweglichkeit (RES) durch eine Schwenkbeweglichkeit (ESC) der Arretierungs- und Antriebsmittel (10) in Bezug auf ein Gestellelement (2) um eine zur Arretierachse (A1) parallele Einfahrachse (A3) erhalten wird.
  10. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei die Verschiebungsbeweglichkeit (TRA) eine Translationsbeweglichkeit des Werkzeugträgers (50) in Bezug auf ein Gestellelement (2) entlang einer zur Arretierachse (A1) parallelen Transferachse (A5) ist.
  11. Vorrichtung zum Randbearbeitung (1) nach einem der vorhergehenden Ansprüche, wobei der Werkzeugträger (50) außerdem Mittel zur Messung (70) der Geometrie der ophthalmischen Linse (L1) trägt, und wobei die Mittel zur Steuerung dafür ausgelegt sind, die Messmittel (70) oder eines von dem ersten und dem zweiten Werkzeug (60, 80) auszuwählen, indem sie die Schwenkungsbeweglichkeit (PIV) des Werkzeugträgers (50) in Bezug auf die Arretierungs- und Antriebsmittel (10) so steuern, dass die Messmittel (70) oder eines von dem ersten und dem zweiten Werkzeug (60, 80) in eine Position zum Messen oder Bearbeiten der ophthalmischen Linse (L1) gebracht werden.
  12. Vorrichtung zum Randbearbeitung (1) nach dem vorhergehenden Anspruch, wobei die Messmittel (70) einen Taster (71) umfassen, welcher mit einem Tastansatz (72) ausgestattet ist, der dafür ausgelegt ist, an wenigstens einer der optischen Flächen der ophthalmischen Linse (L1) zur Anlage zu kommen.
  13. Verfahren zur Steuerung der Beweglichkeiten eines Werkzeugträgers (50) in Bezug auf Arretierungs- und Antriebsmittel (10) einer Bearbeitungsvorrichtung (1) nach einem der Ansprüche 11 und 12, folgende Schritte umfassend:
    - Auswahl einer ersten Spitze (73) des Tasters (71) durch Steuern der Schwenk- (PIV) und der Translationsbeweglichkeit (TRA), um diese erste Spitze (73) gegenüber einer ersten optischen Fläche der ophthalmischen Linse (L1) anzuordnen,
    - Messung der Geometrie einer ersten Kontur, die sich auf der ersten optischen Fläche befindet, durch koordiniertes Steuern der Drehbeweglichkeit (ENT) der Arretierungs- und Antriebsmittel (10) und der Abstandsbeweglichkeit (RES) des Werkzeugträgers (50),
    - Auswahl einer zweiten Spitze (74) des Tasters (71) durch Steuern der Schwenk- (PIV) und der Translationsbeweglichkeit (TRA), um diese zweite Spitze (74) gegenüber einer zweiten optischen Fläche der ophthalmischen Linse (L1) anzuordnen,
    - Messung der Geometrie einer zweiten Kontur, die sich auf der zweiten optischen Fläche befindet, durch koordiniertes Steuern der Drehbeweglichkeit (ENT) der Arretierungs- und Antriebsmittel (10) und der Abstandsbeweglichkeit (RES) des Werkzeugträgers (50),
    - Auswahl eines von dem ersten und dem zweiten Werkzeug (60, 80) durch Steuern der Schwenkbeweglichkeit (PIV), um dieses Werkzeug (60, 80) gegenüber der Schmalseite der ophthalmischen Linse (L1) anzuordnen,
    - Randbearbeitung der ophthalmischen Linse (L1) durch koordiniertes Steuern der Drehbeweglichkeit (ENT) der Arretierungs- und Antriebsmittel (10) und der Abstands-(RES) und Verschiebungsbeweglichkeit (TRA) des Werkzeugträgers (50).
  14. Verfahren zur Steuerung nach dem vorhergehenden Anspruch, wobei im Schritt der Randbearbeitung die Schwenk- (PIV) und die Translationsbeweglichkeit (TRA) des Werkzeugträgers (50) in Abhängigkeit von den gemessenen Geometrien der zwei Konturen gesteuert werden.
EP14713184.1A 2013-03-08 2014-02-25 Vorrichtung zum schneiden einer ophthalmischen linse Active EP2964423B1 (de)

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FR1352114A FR3002871B1 (fr) 2013-03-08 2013-03-08 Dispositif de detourage de lentilles ophtalmiques
PCT/FR2014/050406 WO2014135761A1 (fr) 2013-03-08 2014-02-25 Dispositif de detourage de lentilles ophtalmiques

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CN106002535B (zh) * 2015-03-31 2020-05-22 尼德克株式会社 眼镜镜片加工装置
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FR2711331B1 (fr) * 1993-10-19 1996-01-26 Essilor Int Machine à déborder pour verre de lunettes.
EP0868972B1 (de) * 1997-03-26 1999-06-09 Optotech Optikmaschinen GmbH Verfahren und Vorrichtung zur Bearbeitung optischer Linsen
DE10020879B4 (de) * 2000-04-28 2006-01-19 Dipl.-Ing. Laempe Gmbh Vorrichtung zum mechanischen Vor- und/oder Fertigbearbeiten von Gussteilen
FR2852878B1 (fr) * 2003-03-27 2006-09-29 Briot Int Machine de meulage de verres optiques.
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JP4708035B2 (ja) * 2005-01-06 2011-06-22 株式会社ニデック 眼鏡レンズ加工装置
FR2906746B1 (fr) * 2006-10-10 2009-05-22 Essilor Int Dispositif d'usinage de lentilles ophtalmiques comprenant une pluralite d'outils d'usinage disposes sur un module orientable
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JP5356082B2 (ja) * 2009-03-26 2013-12-04 株式会社ニデック 眼鏡レンズ加工装置
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EP2964423A1 (de) 2016-01-13
CN105026106B (zh) 2017-07-11
CA2904024A1 (fr) 2014-09-12
FR3002871A1 (fr) 2014-09-12
CN105026106A (zh) 2015-11-04
CA2904024C (fr) 2020-12-29
US20160008945A1 (en) 2016-01-14
ES2819225T3 (es) 2021-04-15
FR3002871B1 (fr) 2015-03-13
US9855634B2 (en) 2018-01-02
BR112015021775A2 (pt) 2017-07-18
WO2014135761A1 (fr) 2014-09-12

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