EP2364240B1 - Machine ophtalmique et procede d'usinage et/ou de polissage de lentille - Google Patents

Machine ophtalmique et procede d'usinage et/ou de polissage de lentille Download PDF

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Publication number
EP2364240B1
EP2364240B1 EP09760228.8A EP09760228A EP2364240B1 EP 2364240 B1 EP2364240 B1 EP 2364240B1 EP 09760228 A EP09760228 A EP 09760228A EP 2364240 B1 EP2364240 B1 EP 2364240B1
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Prior art keywords
blank
machining
holding
axis
machine
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EP09760228.8A
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German (de)
English (en)
French (fr)
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EP2364240A1 (fr
Inventor
Guy Monnoyeur
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0055—Positioning of lenses; Marking of 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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0031—Machines having several working posts; Feeding and manipulating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0052—Lens block moulding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes

Definitions

  • the invention relates to an ophthalmic machine for machining and / or polishing a lens or plastic blank comprising at least one machining and / or polishing tool, machining means according to a first axis designed for to drive said tool, part support means on which are arranged means for holding at least one blank which comprises a first face and a second face opposite to each other, means for reversing said blank to allow its machining on each of said faces.
  • the invention also relates to a workpiece tool for maintaining a blank.
  • the invention also relates to a method for machining and polishing optical or ophthalmic lenses in mineral or organic glass.
  • the present invention relates to the field of manufacturing optical components, particularly rigid or flexible lenses, or contact lenses, or polished end-state components, such as mirrors, vials or the like.
  • the invention relates to an ophthalmic machine for machining and / or polishing lens blank in mineral or organic glass, more specifically ophthalmic or optical lenses, and a related method.
  • a machining machine for optics usable for producing aspherical, concave, or convex surfaces, so-called progressive surfaces, or surfaces with variable power, or on a block of material that can then be used as a mold for producing an ophthalmic lens by molding a material organic, or directly from a blank.
  • Such a machine has three axes, including two linear and a rotary on which is mounted a workpiece tool. The movements of the axes are used to obtain the desired trajectory, in particular spiral, of a tool on the surface of the workpiece, and according to the depth of pass, that is to say the amount of material that the The tool must remove in sequence at successively spaced points along the spiral path.
  • the carriage which supports the holder must therefore perform an oscillating rectilinear movement, whose amplitude can reach values important, especially in the case where the optical surface to be machined has radii of curvature of very different values between the equator plane and the main meridian plane of the surface to be machined.
  • the point of contact between the tool and the surface to be machined passes from the equatorial plane to the main meridian plane, then again to the equatorial plane, and so on .
  • Such a mode of operation is unfavorable from the point of view of the machining precision, the machining time and the freedom of choice of the machining path or other machining parameters.
  • the main disadvantage is that of catching the backlash when reversing on a given axis, which results in a surface defect and a visual mark on the workpiece, which is not permissible. .
  • Precision and machining time are two very closely related variables: the slower the movement or oscillation speeds of the tool or the workpiece carrier, the faster the machining time but the greater the accuracy.
  • the object of the present invention is therefore to provide a machine which makes it possible to obtain high machining precision with a short machining time and which gives greater freedom in the choice of the path of the machining tool. , allowing the choice of a machining strategy capable of eliminating any surface condition defect.
  • the present invention relates, according to claim 1, to an ophthalmic machine for machining and / or polishing a lens blank or a plastic blank comprising at least one machining and / or polishing tool, means for machining according to a first axis designed to drive said tool, part support means on which are arranged means for holding at least one blank which comprises a first face and a second face, means for reversing said blank to allow its machining on each of said faces, characterized in that said means machining are designed capable of carrying on said blank identifiers recognizable or identifiable by means of control that includes said ophthalmic machine for the repositioning of said blank on said holding means after machining of the opposite face.
  • the ophthalmic machine comprises polishing means for driving at least one polishing tip along a second axis parallel to or coincident with said first axis of said machining means.
  • the invention relates, according to claim 11, to a workpiece tool for holding a lens blank in the form of a spherical cap or the like, characterized in that it comprises, mounted on an oblique bearing surface with respect to a mounting surface included in said workpiece tool for its mounting on a frame or on a carriage, means for holding said blank designed for holding at least one vacuum blank at a port around which are positioned, on the one hand at least one designed O-ring capable of creating a vacuum-tight volume for maintaining a said blank, and secondly at least one fixed support designed to withstand the same blank in the vicinity of the more large diameter of the latter, said O-ring being designed able to deform under the effect of a vacuum applied to said orifice without at any time deform a blank positioned in support of both r said fixed support and said O-ring.
  • the present invention relates to an ophthalmic machine for machining and polishing 1 lens blank mineral or organic glass, or plastics, including ophthalmic lenses, comprising at least one tool 2 for machining and / or polishing, machining means 3 designed to drive this tool 2 according to a first machining axis Z1, and part support means 4.
  • optical components in particular rigid or flexible lenses, or contact lenses, or even spectacle frame elements, for the production of which The invention is particularly well adapted. It is understood that the invention is still usable for many surface applications requiring a very thin surface state, particularly polished, on objects having different faces to be machined by turning, such as flasks, medals, molds, jewelry or the like.
  • support means 4 are arranged holding means 5 designed to maintain at least one blank 100.
  • the latter comprises at least a first face 101 and a second face 102, opposite to one another.
  • the ophthalmic machine 1 comprises turning means of such a blank 100 to allow its machining on each of the faces 101 and 102.
  • the ophthalmic machine 1 is designed to allow the realization of usable markers to ensure perfect repositioning during the turning of the blank, to go from the machining of the first face 101 to that of the second face 102, or vice versa.
  • the machining tool 2 is designed capable of transferring to the blank 100 marking means recognizable or identifiable by means of control that comprises the ophthalmic machine 1, to allow the repositioning of the blank 100 on the holding means 5 after machining the opposite face.
  • the first face means the first face which is machined, concave or convex in the particular case of a lens. This obviously does not prevent the return to the first face after machining the second.
  • the control means may comprise first control means 6 located on an axis Z3 that the machine comprises, preferably parallel to or coincident with the first axis Z1, and second control means 7 located at the level of holding means 5 such that a tool holder.
  • These second control means 7 may advantageously comprise positioning control means, in particular centering pins or the like.
  • the ophthalmic machine 1 is arranged, as visible on the figure 1 in the manner of a machine tool such as a machining center. It comprises a main frame 8, which itself carries secondary frames 9 themselves carrying carriages 10, which are oriented in a direct orthogonal cartesian coordinate system along the X, Y, Z axes, the latter axis Z being parallel or coincidental with the first axis Z1, and with, for each of these axes, at least one carriage, respectively 10X, 10Y, 10Z.
  • the X and Z axes define a horizontal plane H, the X and Y axes a first vertical plane Vxy, and the axes Z and Y a second vertical plane Vzy.
  • the machine is designed as a granite gantry, supported by a bench itself granite.
  • the movements of the carriages along X, Y and Z axes are advantageously carried out by linear motors. This avoids the mechanical stresses generated by the screw-nut systems of the prior art, and the accuracy is increased.
  • the measurement rules and their electronics are integrated in these motors, the precision and at the same time the dynamics of the machine are improved.
  • a secondary frame 9Z along the Z axis, corresponding to the machining means 3, comprises driving means, preferably constituted by such a linear motor, of at least one 10Z designed trolley adapted to carry a machining spindle 11, comprising a tool holder 12, in which is mounted a tool 2, thus moving along the first axis Z1 parallel to or coincident with the axis Z of the ophthalmic machine 1.
  • the secondary frame 9Z thus supports one or more carriages 10Z, each designed to carry machining means 3, and / or first control means 6, and / or polishing means 13.
  • the use of separate carriages makes it possible to independently of managing secondary axes such as the first machining axis Z1, a second parallel polishing axis Z2 or coinciding with the first axis Z1, a control axis Z3 parallel to or coinciding with the first axis Z1.
  • the carriage 10Z advantageously gathers, juxtaposed along axes Z1, or / and Z3, or / and Z2, parallel to each other, machining means 3, and / or first control means 6, and / or means polishing 13.
  • This preferred embodiment requires only a sufficiently wide dimensioning of the ophthalmic machine 1, in particular with regard to its strokes in X, Y, and Z, to avoid any risk of interference between on the one hand the machined parts or blanks 100, their holding means 5 and the support means 4, and secondly the machining means 3, and / or the first control means 6, and / or the polishing means 13, and of course the respective trolleys on which are arranged these different elements.
  • the position of each of the means, and therefore of each tool 2 is therefore perfectly known.
  • the machining means 3 in a non-limiting mode, consist of at least one machining spindle 11, or an electro-spindle, or the like, driving a machining tool 2 such as a cutter or a grinding wheel, for example a ball mill 16 as visible on the figure 3 or any suitable tool, of cylindrical, conical, or shape adapted to the machining to achieve.
  • the tool 2 is sufficiently versatile to allow both the machining, in a first time of the first face 101, and in a second time of the second face 102 of a blank 100.
  • machining tool with a hemispherical tip it is possible to machine the whole of a complex left surface, and working, when possible, on its part farthest from its main axis, to have the largest possible peripheral speed, and therefore better machining.
  • the outer shape of the lens according to its edge is machined on the ophthalmic machine 1 with the same tool 2 used for machining its faces, and in particular the roughing tool in the case where several successive tools are used.
  • a tool 2 comprising a cylindrical part, for example following a hemispherical tip.
  • the ophthalmic machine 1 can be used as an optician overflow machine.
  • a tool 2 is then used comprising one or more cutting edges or cutting surfaces complementary to the profile of the bevel.
  • the first control means 6 may be of the type with or without contact, for example of the optical, ultrasonic, tactile or inductive type such as "Renishaw” feelers or the like, and may comprise a tip 17 such as a tip said star, classic on measuring centers or on machining machines to perform a three-dimensional measurement. These first control means 6 allow verification of each machining, successive machining if it is the case, as well as the good replacement of the blank after its reversal. They make it possible to provide the values of origin offset and / or inclination of axes to be taken into account during a possible recalculation of the trajectory of the machining tool or the polishing tool.
  • the ophthalmic machine 1 comprises a laser engraving head and / or control designed able to verify, and / or index, and / or control, the marking means reported by the tool 2 machining. It is understood that the ophthalmic machine 1 is designed capable of transferring to the blank 100 marking means, which can be made by the machining means 3, or by additional means such as such a laser engraving head.
  • the first control means 6 can also integrate such a laser head to check, and / or index, or / and control these means of tracking.
  • the polishing means 13 may comprise a laser, with a fairly wide beam, that is to say a few square millimeters of section, which makes it possible to provide a perfect finish after machining.
  • the same laser can also be used for engraving tasks or the like.
  • indexing means are reported in the form of indexes made on the first face 101 and / or on the second face 102, for example by engraving marks, lines, patterns, barcodes or the like, or on another surface of the workpiece such as the edge of a lens, in the form of notches or the like.
  • the carriage 10Z along the Z axis may also comprise additional machining means, such as a small drilling spindle or the like, designed to perform particular machining operations, such as drilling holes on spectacle lenses. without removing the blank.
  • additional machining means such as a small drilling spindle or the like, designed to perform particular machining operations, such as drilling holes on spectacle lenses. without removing the blank.
  • the ophthalmic machine 1 comprises, at the level of the axis Z, polishing means 13 for driving at least one mouthpiece. polishing 15 along a second axis Z2 parallel to or coincident with said first axis Z1 of the machining means 3.
  • polishing means 13 allow complete completion of the manufacture, particularly in the case of an optical lens.
  • these polishing means 13 comprise at least one ultrasonic head 14 carrying a polishing tip 15, via a tool holder if necessary. This ultrasonic head 14 polishes the workpiece, after finishing machining with the milling cutter and / or grinding wheel, with movements point by point, on each of its faces.
  • the ultrasonic head 14 makes it possible, in a preferred but nonlimiting application, to apply to the tip 15 a vibration at an ultrasonic frequency, in particular between 10 and 30 kHz, which is preferably chosen close to 25 kHz for a good compromise between noise and quality.
  • the ultrasonic frequency vibration generation can in particular be made by an excitation means delivering a sinusoidal signal to a converter consisting of at least two piezoelectric ceramics placed in tension between two metal masses, which ceramics deform and contract in function the frequency of the sinusoidal signal delivered.
  • the resonance frequency of the metal masses is consistent with the frequency of this signal, which has the effect of amplifying the vibration movement of these masses.
  • Their vibrations are transmitted to the tip 15, with the necessary interposition of an amplifier.
  • a relative movement of penetration of the tip 15 into the blank 100 is performed until the endpiece 15 reaches a depth of determined depth.
  • the penetration speed is chosen according to the nature of the blank 100.
  • the ophthalmic machine 1 is advantageously equipped with cleaning means by washing and / or lubrication, blowing, ultrasonic cleaning, or the like .
  • the ophthalmic machine 1 advantageously also comprises at least one cooling unit, in particular for cooling the lubricating fluid used for machining, and which can also be used for cooling electrospindles or other machining means, and for stabilizing , if desired, the temperature of the frames and trolleys.
  • the different active means that is to say the machining means 3 and / or the polishing means 13 are mounted only on the trolley 10Z of the Z axis, or on separate carriages equipping the secondary frame 9Z of the Z axis.
  • the main frame 8 carries a secondary frame 9X, which itself supports at least one mobile carriage 10X along the horizontal axis X.
  • the latter itself carries at least one carriage 10Y movable along the axis Y.
  • This carriage 10Y in turn carries means for supporting parts 4 carrying holding means 5 of at least one blank 100. If the race of the 10X carriage on the X axis is sufficient, can be machined two blanks 100 simultaneously.
  • This architecture is preferred for producing the ophthalmic machine 1, in its application to the machining of optical lenses in pairs, in the form of a compact machine, not exceeding the footprint of a standard pallet, and not requiring no special civil engineering, the main frame 8 may instead be designed mobile.
  • Other architectures are imaginable, but lead to the cost of the machine, or a much higher overall volume.
  • the piece support means 4 comprise at least one workpiece tooling 19.
  • This comprises an inclined bearing surface inclined with respect to a mounting surface 230 that includes this door -Piece 19 for its mounting on a frame or a carriage, according to a first angle ⁇ with respect to the Y axis orthogonal to the axis Z1 in a Vzy plane, and according to a second angle ⁇ with respect to the orthogonal X axis the axis Z1 and the Y axis in a plane H, the angles ⁇ and ⁇ being preferably each between 20 ° and 45 °.
  • This bearing surface 20 carries the holding means 5 of the blank 100.
  • These advantageously comprise indexing elements, for example by centering pins or the like, to position the blank correctly during its inversion to to machine the second face in perfect coherence with the first.
  • the holding means 5, in a preferred and non-limiting embodiment of the invention, are designed for holding at least one blank 100 by depression.
  • the depression is maintained by the actuation of a vacuum pump, for example of the "ML20 PIAB” type venturi effect at an orifice 21.
  • This workpiece tooling 19 is designed primarily for maintaining a lens blank 100 in the shape of a spherical cap or the like.
  • the tool 19 is versatile and adaptable to other machining means, definition or control.
  • the tooling 19 comprises, mounted on a support surface 20 oblique with respect to a mounting surface 230 that comprises the workpiece 19 for mounting on a frame or on a carriage of a machining machine.
  • this orifice 21 are positioned, on the one hand at least one O-ring 22 designed capable of creating a vacuum-tight volume for maintaining a blank 100, and secondly at least one fixed support 221 designed able to supporting the same blank 100, preferably in the vicinity of the largest diameter of the latter.
  • This O-ring 22, mounted at the level of the bearing surface 20, is designed to be deformable under the effect of a vacuum applied to the orifice 21 without at any time deforming a blank 100 which is positioned in support of both on the fixed support 221 and on the O-ring 22.
  • the fixed support means 221 are continuous in the form of a toroid coaxial with the O-ring 22, or consist of keys constituting segments of such a torus.
  • the axial position of the O-ring 22 is adjustable by the effect of adjustment means 223 in a direction normal to the bearing surface 20 and to the blank 100.
  • the tooling 19 preferably comprises at least one adjustable support 222 designed able to bear on the blank 100 in the central part of the latter.
  • the adjustment means 223 and the adjustable support 222 are independent of one another.
  • O-ring 22 in a non-limiting embodiment, having a diameter of 6 mm and a hardness of 30 shore, thus making it possible to fix the blanks 100, especially lenses, directly on the workpiece holder 19, without mechanical deformation due to jaws or the like.
  • the O-ring 22 is designed capable of deforming without at any time deforming the blank 100.
  • the blank 100 bears on the O-ring 22, which can be made adjustable by adjustment means 223 such as a thrust ring, for example threaded, as well as on at least one fixed support 221 near the largest diameter of the blank 100, and preferably in a region of the blank 100 which will be lost after trimming.
  • the central portion of the blank 100 is preferably supported on an adjustable support 222, in a non-marking material, for example elastomer, the adjustment can be made by screws, or by elastic return means, or the like.
  • the adjustable support 222 is placed in position automatically during the introduction of the blank 100, thus the O-ring 22 deforms in the same manner as the outer seal.
  • the figure 6 illustrates the maintenance of a blank 100 having its convex face to the machining means, and the figure 7 the opposite case of a presentation of the concave face. It is clearly seen the difference in positioning of the adjustable support 222 and adjustment means 223 from one case to another.
  • the tooling 19 is both versatile and very compact, which authorizes, even on a small machining machine, the assembly of a panoply of several tools 19 equipped with blanks 100.
  • the ophthalmic machine 1 is equipped with at least two workpieces 19, it is then possible to machine a convex surface on one and a concave surface on the other, without the intervention of the operator or a manipulator. . It is also possible to produce two concave surfaces or two convex surfaces simultaneously. For example, the machining of the convex surface for a right eye and for a left eye of a pair of glasses or lenses is done in a single cycle, for the same customer order, and without operator intervention.
  • the system according to the invention also supports, without modification, a blocked glass, as in the existing technology.
  • Another way of maintaining the blank 100 on the oblique bearing surface 20 of the workpiece holder 19 is to fix on the latter, at the level of a gripping means that it comprises, an insert integral with a layer fusible metal conforming, by means of an adhesive film, one of the faces of the blank 100 opposite the face to be machined.
  • a fuse metal is selected from low melting temperature alloys, for example 47 ° C, so as not to damage or deform the blank 100 when it is a lens of organic material.
  • the machining or the preliminary marking of marking means for the positioning of the blank 100 during its reversal allows handling by a robot.
  • the lenses can be exchanged to machine both sides of the lenses corresponding to the right eye and the left eye. In this way, both lenses are machined on both sides. We thus manufacture two finished prescription lenses.
  • the ophthalmic machine 1 is equipped with a computer, or a computer, or the like, which calculates the surfaces to be machined. It is therefore possible to machine simple surfaces and / or complex surfaces such as aspherical or progressive surfaces for ophthalmic optics. The machining of other surfaces is limited only by the strokes of the ophthalmic machine 1.
  • the computer is integrated, neither in the frame 8, nor on the ophthalmic machine 1 itself, so as to facilitate the maintenance and evolution of the computer equipment.
  • the method used to machine an ophthalmic lens comprises starting a machining periphery of the lens, moving the tool along a helicoid to complete its working stroke in the center of the lens. If this method avoids a reversal of the direction of movement of the Z axis of the machine, which is essential for machining without surface condition defects, it nevertheless causes a slight defect in the center of the part because the Z-dimensional deviations in the center are very low in values, and the tool 2 must reach its dimension and simultaneously emerge. In addition, this end of machining corresponds to the machining of the optical center of the part which must not bear any defect.
  • the tool 2 produces a blank 100 of the lens type, for example of diameter 66 mm, by scanning while moving on horizontal or vertical lines.
  • the blank 100 is held by a workpiece holder 19 at a bearing surface inclined with respect to the axes X and Y, so that the displacements on the Z axis are always in the same direction, in particular positive, that is to say that one performs a Z-machining always increasing or always decreasing throughout the machining sequence of one of the faces 101 or 102 of the blank 100. This prevents any alteration of the surface.
  • the positioning of a blank 100 on an inclined surface 20 is therefore particularly advantageous as regards the quality of the machining performed.
  • the machining means 3 allow an etching of the workpiece, which can also allow an ultrasound head, a laser or ancillary means such as a spindle equipped with tools of small diameter. These engravings, such as barcodes, made directly on the blanks 100 may be superficial, or inside one of the faces 101 or 102, or on another surface of the blank 100 such as its edge. Their location by the first control means 6 allows the implementation of a specific machining and / or polishing program, or to launch and perform a complete recalculation of the machining and / or polishing trajectory .
  • a workpiece holder 19 having an inclined bearing surface 20, as previously described, makes it possible to have several notable advantages.
  • the inclination of the bearing surface 20 avoids machining on points near the main axis of the tool 2, and allows it to be used in areas where the speed is greater. The quality and the profitability of the machining are improved.
  • Another advantage of the inclination of the bearing surface 20 along the two axes X and Y makes it possible to have only one point of contact between the tool 2 and the surface to be machined, and especially by working only on three axes instead of four or five axes, which allows the use of a simple and inexpensive machine.
  • the precision of the axes is of the order of a few microns to a few tens of microns.
  • the use of a fourth axis or a fifth axis adds uncertainties that influence the precision of the machined part.
  • the tool 2 is made with a precision of the same order as that of machine axes equipped with linear motors, so three axes are sufficient to achieve a precise surface.
  • the displacements along the three axes are carried out over greater distances.
  • the displacements along the three axes are carried out over greater distances.
  • Another advantage of the inclination of the bearing surface 20 is to facilitate the evacuation of the chips and the cutting liquid, thereby avoiding any presence of chips and / or dust on the surface during machining, and thus prevent any scratches on the surface.
  • This aspect is essential for surfaces having a concave curvature, more manual or automatic grip is improved because the surface does not retain the cutting fluid.
  • the X and Y axes are placed in a vertical plane Vxy, this principle allows improved chip clearance and cutting liquid removal.
  • the main frame 8 has an opening 23 for their evacuation, or a slope for the same purpose, disposed under the machining area.
  • no motor axis is located below the workpiece, or below the chips, and in particular the machining means 3 and the first control means 6, or the polishing means 13 are suspended under the secondary frame 9Z and are particularly well protected during the machining or polishing cycle.
  • the end point of the spiral can also be moved from the top of the surface to the periphery of the part, in order to minimize the risks of machining defects mentioned above.
  • the lenses can be changed in place and reversed to machine the right eye and the left eye. In this way, both lenses are machined on both sides.
  • This flipping means may be of manual type such as an operator or automatic such as a robot.
  • the invention proposes novel solutions for a complete manufacture of ophthalmic lenses or optical glasses, which includes machining, polishing, control and identification.
  • the design of the architecture of the ophthalmic machine strikes machines known in the state of the art, which included only rotary axes, and thereby made any machining by scanning impossible.
  • the choice of equipment of the ophthalmic machine of the invention with linear axes makes it possible to carry out any desired type of scanning, in particular to avoid defects in the center of the lens.
  • the relative positioning of the shafts is designed for perfect evacuation of chips and machining or polishing waste, thus avoiding any damage to the workpiece during machining.
  • the invention has further endeavored to provide a very precise and firm support on a vacuum workpiece tooling, specially designed to prevent any strain under stress of the blank during machining.
  • This special tool holder is designed with an inclined support face to provide this oblique support.
  • This tool holder is designed for easy handling of blanks ⁇ lenses by a manipulator such as opu similar robot, because the entire periphery of the room is cleared, and the grip is then facilitated.
  • the ophthalmic machine is designed for machining indexing surfaces as well as markings on the blank, these markings for identification and / or marking and / or positioning, and tooling -piece is designed to directly center the blank with respect to these indexing surfaces.
  • the ophthalmic machine also comprises means for controlling the axes of the machine, its ancillary functions and its servitudes. These control means are interfaced with control means that also comprises the machine according to the invention, which are designed to perform dimensional checks, both absolute and with reference to markings made on the blank or the lens. The results of these checks are translated into deviations from theoretical values, and returned to the control means to control very precisely, both the movement of manipulators positioning or reversing parts, the axis movements of the ophthalmic machine for finishing machining , polishing or marking lenses.
  • the invention is versatile and can be used with advantage in the field of polished surfaces, such as mirrors, flasks, or the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP09760228.8A 2008-10-29 2009-10-28 Machine ophtalmique et procede d'usinage et/ou de polissage de lentille Active EP2364240B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09760228T PL2364240T3 (pl) 2008-10-29 2009-10-28 Maszyna oftalmiczna i sposób obróbki i/lub polerowania soczewki

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0857364A FR2937574A1 (fr) 2008-10-29 2008-10-29 Dispositif et procede d'usinage et/ou de polissage de lentille
FR0950763A FR2937573B1 (fr) 2008-10-29 2009-02-06 Dispositif et procede d'usinage et/ou de polissage de lentille.
PCT/FR2009/052076 WO2010049645A1 (fr) 2008-10-29 2009-10-28 Machine ophtalmique et procede d'usinage et/ou de polissage de lentille

Publications (2)

Publication Number Publication Date
EP2364240A1 EP2364240A1 (fr) 2011-09-14
EP2364240B1 true EP2364240B1 (fr) 2013-07-31

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EP09760228.8A Active EP2364240B1 (fr) 2008-10-29 2009-10-28 Machine ophtalmique et procede d'usinage et/ou de polissage de lentille

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US (1) US8961267B2 (zh)
EP (1) EP2364240B1 (zh)
CN (1) CN102264509B (zh)
BR (1) BRPI0920917A2 (zh)
FR (2) FR2937574A1 (zh)
PL (1) PL2364240T3 (zh)
WO (1) WO2010049645A1 (zh)

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CN107378688B (zh) * 2017-09-11 2024-05-28 深圳市灿弘自动化科技有限公司 一种下摆机全自动上下料装置及上下料方法
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CN102264509B (zh) 2014-10-29
EP2364240A1 (fr) 2011-09-14
US20110256806A1 (en) 2011-10-20
FR2937573A1 (fr) 2010-04-30
US8961267B2 (en) 2015-02-24
PL2364240T3 (pl) 2014-03-31
WO2010049645A1 (fr) 2010-05-06
CN102264509A (zh) 2011-11-30
FR2937573B1 (fr) 2011-12-30
BRPI0920917A2 (pt) 2015-12-29
FR2937574A1 (fr) 2010-04-30

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