FR2889468A1 - METHOD AND APPARATUS FOR LOADING OR UNLOADING DRILLING TOOL ON A CHUCK OF A DEVICE FOR DETOURING AND DRILLING OPHTHALMIC LENSES - Google Patents

Abstract

Device for trimming and drilling an ophthalmic lens, comprising support means capable of clamping and rotating the lens along an axis of rotation, means for trimming the lens installed on the support means and means for piercing the lens. lens installed on the support means, these drilling means comprising a mandrel adapted to receive a replaceable drilling tool (800). According to the invention, the device comprises a tool holder (900) comprising, on the one hand, at least one a receiving part (999) of said piercing tool and, on the other hand, a fixing part (910A, 910B) adapted to cooperate with said support means for clamping and driving in rotation of said tool holder.

Description

TECHNICAL FIELD TO WHICH THE INVENTION REFERS

  The present invention generally relates to trimming and drilling of ophthalmic lenses and more particularly to the loading or unloading of a drilling tool of an ophthalmic lens drilling and trimming machine.

BACKGROUND

  In the context of mounting ophthalmic lenses on pierced type frames, the optician generally uses a piercing tool, for example a drill, to pierce the ophthalmic lenses. These drilling holes subsequently make it possible to fix the ophthalmic lenses thus pierced on the frames of the spectacles.

  This piercing operation is usually performed following the trimming of the edge of the lens to the desired shape. The trimming and drilling of the lenses are therefore advantageously performed on a common device for trimming and drilling ophthalmic lenses. Devices are thus known which comprise support means capable of clamping and rotating an ophthalmic lens, means for trimming the lens installed on the support means and means for drilling the lens installed on the support means, these means drilling device comprising a mandrel adapted to receive a replaceable drilling tool.

  For the precision and aesthetics of the drilling, it is necessary to regularly change the drilling tool so that the drilling is fast, accurate and not damaged by the ophthalmic lens. Moreover, if the piercing tool is broken and wherever it has broken, it must be easily changed.

  Currently, the optician manually performs the loading or unloading of the piercing tool into the mandrel.

  The main disadvantage of manual loading or unloading of the drilling tool is that such a method presents difficulties in fixing the drilling tool on the mandrel if the latter is not easily accessible. Moreover, such loading or unloading tool requires a significant intervention time and the extinction of the trimming machine and drilling for security reasons. Finally, the accuracy and rigidity of the fixation of the piercing tool are random.

  The Applicant has therefore been interested in the design of automated means for loading or unloading the drilling tool that are integrated in the trimming and drilling machine. The obvious solution would be to integrate the ophthalmic lens shaping and drilling device apparatus capable of performing this loading or unloading piercing tool. The disadvantage of such an apparatus would be its large size which should be taken into account when designing the trimming machine and drilling. The design cost of this apparatus and the design of the trimming and drilling machine would therefore be significant. Moreover, such a device necessarily have a clean structure and independent actuators. Its manufacturing cost and maintenance cost would therefore be high.

  OBJECT OF THE INVENTION The object of the present invention is to provide a device and method for loading and / or unloading a piercing tool on a mandrel of an ophthalmic lens shaping and piercing device that does not require modification. of any structure specific to the ophthalmic lens trimming and piercing device.

  For this purpose, it is proposed according to the invention a device for trimming and drilling an ophthalmic lens as defined in the introduction, wherein it is provided that it comprises a tool holder comprising, on the one hand, at least one receiving portion of said piercing tool and, secondly, a fastening portion adapted to cooperate with said support means for clamping and driving in rotation of said tool holder.

  The invention also relates to a method for loading and / or unloading an ophthalmic lens piercing tool on the mandrel of the ophthalmic lens shaping and piercing device, comprising attaching the attachment portion of the tool holder to the support means and the transmission, for its loading or unloading, of the drilling tool between the tool holder and the mandrel.

  Thus, thanks to the invention, the loading or unloading of the drilling tool is carried out using already existing means for trimming and drilling ophthalmic lenses. The tool holder takes the place for ophthalmic lenses on the support means and uses only the existing mobilities of the trimming and drilling device for the automatic loading or unloading of the piercing tool. The method therefore does not require the presence of input or actuation means specific to the loading or unloading of the piercing tool. It therefore does not imply additional cost of design and / or clean maintenance or additional space. Only the software of the electronic and computer system of the trimming and drilling machine may have to be modified. The structure of the drilling device does not require any particular modification to accommodate the tool and / or the tool holder.

  According to a first characteristic of the ophthalmic lens shaping and piercing device according to the invention, the tool holder has substantially the shape and size of a front clipping lens comprising two faces and a wafer.

  According to another advantageous characteristic of the ophthalmic lens shaping and piercing device according to the invention, each receiving part of the piercing tool is a radial housing which opens on the edge of the tool holder.

  Advantageously, each receiving part comprises, on the one hand, rotational stop means of the piercing tool and, on the other hand, means 20 for stopping in translation of the piercing tool.

  Thus, when the piercing tool is disposed on a receiving part, it does not move, even when the tool holder is moving.

  According to another characteristic of the ophthalmic lens trimming and piercing device according to the invention, each housing opens on the edge of the tool holder.

  According to a second characteristic of the method according to the invention, the method comprises the establishment of the receiving portion of the tool holder facing the mandrel of the ophthalmic lens cutting and piercing device.

  Thus, this implementation makes it possible to accurately center the receiving portion of the tool holder facing the mandrel. When loading the drilling tool onto the mandrel, the fixation of the drilling tool on the mandrel can thus be carried out with precision, so that the drilling tool is correctly oriented on the cutting and drilling device. .

  According to another characteristic of the method according to the invention applied to the replacement of the piercing tool, in which, the tool holder comprising at least two receiving parts, including a first empty reception part and a second part of home on which is disposed a replacement drilling tool, the method comprises the steps of: - fixing the tool holder on the support means, - set up the first receiving portion of the tool holder facing the mandrel, - transmitting, for its unloading, the chuck drilling tool to the tool holder, - setting up the second receiving part of the tool holder facing the mandrel, and - transmitting, for its loading, the tool of replacement drilling from the tool holder to the mandrel.

  Thus, the method is particularly applicable to changing a drilling tool. The tool holder being fixed only once to the support means for unloading the drill bit of the mandrel and for its replacement by another drilling tool, the whole process is fast and does not require the intervention of an operator.

  Advantageously, the establishment of the receiving portion of the tool holder facing the mandrel involves the rotation of the support means along the axis of rotation of the support means. The establishment of a receiving portion of the tool holder facing the mandrel may also involve the relative translation of the mandrel relative to the support means in a direction parallel to said axis of rotation of the support means.

  Thus, the establishment of a receiving portion of the tool holder facing the mandrel uses exclusively existing means for relative positioning of the ophthalmic lens relative to the cutting wheels or relative to the drilling tool. The establishment of a receiving portion of the tool holder opposite the mandrel does not require any actuator or additional structure.

  Advantageously, the transmission of the piercing tool between the tool holder and the mandrel involves the relative displacement of the support means towards the mandrel.

  Thus, this transmission does not require any additional means to achieve this function. It involves a relative displacement of the support means relative to the mandrel, movement initially intended for piercing the edge of the ophthalmic lenses.

  According to another advantageous characteristic of the invention, the mandrel being able to rotate about a drilling axis, the method comprises the joining or the separation of the drilling tool with respect to the mandrel by screwing or unscrewing by means of the rotation of the drill. mandrel around its piercing axis.

  Thus, once again, this step of securing or detaching the drilling tool from the mandrel uses a function specific to ophthalmic lens drilling, namely the rotation of the mandrel. It is this rotation, combined with the stop means in rotation of the drilling tool relative to the tool holder, which allows this connection or this separation. This solution has the additional advantage of being able to disassemble a broken drilling tool without the intervention of an operator. Indeed, the extraction of the mandrel piercing tool is not performed by pulling on the piercing tool but by the rotation of the mandrel and by the cooperation of the stop means of the door receiving part. -tool with those of the piercing tool.

  According to another advantageous characteristic of the invention, the method comprises, prior to fixing the fixing portion of the tool holder on the support means, the steps of: acquiring the reference frame of the tool holder on acquisition means able to measure the optical characteristics of an ophthalmic lens, transferring the tool from the acquisition means to the trimming and piercing device opposite the support means, with transfer means able to transfer an ophthalmic lens from the acquisition means to the trimming and drilling device facing the support means, the transfer and fixing of the fixing portion of the tool holder on the support means being made with a follow-up of the reference acquired and stored by mechanical or electronic means.

  Thus, it is possible to automatically transfer the tool holder from the acquisition means on the trimming and drilling device facing the support means with a continuous identification of the tool holder in a fixed reference relative to the clipping device and piercing. The tedious or even dangerous manual operation of setting up the drilling tool or the tool holder on the support means is no longer necessary. The operation then no longer requires the extinction of the trimming machine and drilling. These two automatic operations also make it possible to locate the position of the receiving parts in the repository of the tool holder so that the positioning of each receiving part of the tool holder facing the chuck is automatically and accurately achievable. .

  Advantageously, the measurement of the locating characteristics of the tool holder is an optical or mechanical measurement.

  Thus, this measurement uses a device initially provided for the optical registration or the mechanical probing of the lenses, it does not therefore require any particular modification of the registration or probing device for the implementation of this method.

  DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT

  The following description with reference to the accompanying drawings given as non-limiting examples, will make it clear what the invention is and how it can be achieved.

  In the accompanying drawings: - Figure 1 is a schematic top view of the automatic preparation device for mounting ophthalmic lenses and the loading or unloading of drilling tool according to the present invention; - Figure 2 is an overall perspective view of the outside of the automatic preparation device provided with a cowling; Figure 3 is a perspective view of a trimming machine equipped with a drilling tool and a device for adjusting the orientation of this tool; FIG. 4 is a partial perspective view of the grinder of FIG. 3 showing, in another angle and on a larger scale, the device for adjusting the orientation of the drilling tool, before engagement of the finger in the ramp. Orientation; - Figure 5 is a perspective view of a drilling tool disposed in a receiving portion of a tool holder; - Figure 6 is a perspective view of the interior of the automatic preparation device; - Figure 7 is a perspective view of the carousel and seats forming the reception means and first and second transfer; FIG. 8 is a perspective view of a part of the automatic preparation device, on which the carousel of the reception and first and second transfer means has been removed, revealing the grippers of the means of reception and of first and second transfers, with their actuating mechanism; - Figure 9 is a perspective view of the opening mechanism of the clamps of Figure 8; Figure 10 is a perspective view of the tool holder in which is disposed the drilling tool of Figure 5; Figure 11 is a sectional and perspective view of a receiving portion of the tool holder of Figure 10; Fig. 12 is a perspective view of the preparation device in its third transfer configuration of the tool holder; FIG. 13 is a perspective view of the preparation device in a relay passage configuration, in which the tool holder is held by both the probing, gripping and third transfer means and by the locking means and driving the rotation of the trimming and drilling device; Fig. 14 is a perspective view of the piercing tool of Fig. 5 and a portion of the tool holder of Fig. 10; FIGS. 15A and 15B are perspective views from two different angles of an alternative embodiment of the drilling tool of FIG. 5; FIG. 16 is a perspective view illustrating an alternative embodiment of the device for adjusting the orientation of the drilling tool in which the pivoting of the drilling axis around its orientation axis is controlled in favor of displacement in a direction substantially parallel to the axis of the tool holder; and Figure 17 is a perspective view of the alternative embodiment of Figure 16, showing the cooperation of a lever-ramp associated with the drill body with a fixed stop of tilting associated with the frame of the device.

  COMPONENTS OF THE AUTOMATIC PREPARATION DEVICE

  As shown more particularly in FIGS. 1 and 2, the assembly preparation device 1 according to the present invention comprises several subassemblies mounted on a common frame: a measuring device 5 for the automatic measurement of various characteristics of the lenses L1 and L2 and in particular to the measurement of local ophthalmic powers at remarkable points such as the optical center of a unifocal lens, and the measurement of at least one locating characteristic, such as a centering characteristic, of an axis , locating reference points for distant vision and near vision, of the lens; a device for trimming and drilling 6 ophthalmic lenses; combined reception means and first and second transfers 2 designed and arranged to receive one or more ophthalmic lens jobs L1, and to circulate them between a loading and unloading position, a measuring position in which the lens ophthalmic is presented next to the measuring device 5 for measuring its locating characteristics and an intermediate position for its support by the probing means, seizure and third transfer provided below; probing, grasping and third transfer means 7 designed and arranged for firstly palpating each ophthalmic lens in preparation and secondly for grasping this lens with a view to transferring it from the reception and first and second means; second transfers 2 to the trimming and drilling device 6; an electronic and computer system 100 designed for executing an automated processing method according to the invention; a cowling 20 enclosing the assembly for its protection and having a restricted access door 26; - A tool holder 900 independent of the previous elements and provided for the loading or unloading of a drilling tool 800 disposed in the trimming and drilling device 6.

  Measuring device The measuring device 5 has several functions for measuring various characteristics of the lens. Among these various functions, there are two main functions which consist, for one, in measuring the local optical powers of the lens at remarkable points thereof, and for the other, in detecting and locating characteristics of the lens. centering or locating the lens in order to establish and properly position the optical reference system of the lens in a known global repository of the device.

  The measuring device 5 has two main complementary measurement systems to determine the characteristics of a lens. The first system is a global optical measurement system of the lens obtained by interferometry (or deflectometry ...). This measurement in particular implements a camera responsible for recording an image distorted by the lens in order to compare it with the initial image to determine, for example, the various optical powers of a lens in one or more remarkable points of the lens. The second system is a cartographic imaging system. The system, by means of the camera, directly captures images of the lens and sends them to the electronic and computer system 100 which processes the information by image recognition. This system thus determines the position of the marks engraved or plotted on the lens in order to determine its repository and to keep it in memory.

  In addition to a function for acquiring the optical reference of a lens, the measuring device 5 can exert, by the same image recognition process, an acquisition function of the mechanical reference of the tool holder 900.

  Thus, when the tool holder 900 is disposed in the measuring position, the measuring device 5 can perform this locating function. The measuring device 5 then operates without contact, by cartographic ensemble imaging, and is able to locate the permanent marks engraved on the tool holder in order to determine its reference. These permanent landmarks are, for example, similar to those of an ophthalmic lens. As shown in Figure 10, they include: - two small circles or signs 16 located on the horizontal of the tool holder 900 passing through its center and always located 17 mm on either side of the same center; these engravings make it possible to find the horizontal and vertical centering of the tool holder; a sign 17 making it possible to identify the fact that the object disposed in measuring position is a tool holder and not an ophthalmic lens.

  Thickness dimensions 922 of the measured face of the tool holder 900 can also be determined optically.

  As a variant, the reference frame of the tool holder 900 can, as explained more precisely in the rest of the text, be marked by mechanical probing using the probing, gripping and third transfer means 7.

  Trimming and Drilling Device The trimming function of the trimming and drilling device 6 can be realized in the form of any cutting or material removal machine adapted to modify the contour of the ophthalmic lens to adapt it to that of the frame or "circle" of a selected mount. Such a machine may consist for example of a grinder, a laser cutting machine or jet water, etc. The trimming and drilling device 6 comprises, in a manner known per se, an automatic 610 grinder, commonly called digital. This grinder comprises, in this case, a rocker 611, which is freely pivotally mounted about a first axis A1, in practice a horizontal axis, on a frame 601. This pivoting is controlled, as we shall see in more detail by the following.

  For the immobilization and rotational drive of an ophthalmic lens such as L1 to be machined, the grinder is equipped with support means able to clamp and rotate an ophthalmic lens. These support means comprise two shafts and rotation drive 612, 613. These two shafts 612, 613 are aligned with each other along a second axis A2, called locking pin, parallel to the first axis Al. The two shafts 612, 613 are rotated synchronously by a motor (not shown), via a common drive mechanism (not shown) embedded on the flip-flop 611. This common synchronous rotation drive mechanism is of type current, known in itself.

  Alternatively, it will also be possible to drive the two shafts by two separate motors synchronized mechanically or electronically.

  The ROT rotation of the shafts 612, 613 is driven by a central electronic and computer system (not shown) such as an integrated microcomputer or a dedicated integrated circuit assembly (ASIC).

  As shown in FIG. 3, each of the shafts 612, 613 has a free end which faces the other and is equipped with a locking nose 101, 102. These locking noses 101, 102 are not always fixed on the shafts 612, 613. They are in fact previously used by the probing, gripping and third transfer means 7 before being transferred to the present clipping and piercing device. 6 by staying in contact with the transferred lens.

  The shaft 613 is movable in translation along the blocking axis A2, facing the other shaft 612, to effect the compression in axial compression of the lens L1 between the two locking noses 101, 102. The shaft 613 is controlled for this axial translation by a drive motor via an actuating mechanism (not shown) controlled by the central electronic and computer system. The other shaft 612 is fixed in translation along the blocking axis A2.

  The trimming and drilling device 6 comprises, on the other hand, a train of at least one grinding wheel 614, which is locked in rotation on a third axis A3 parallel to the first axis Al, and which is also properly rotated. by a motor not shown.

  In practice, the grinder 610 comprises a train of several grinding wheels 614 mounted coaxially on the third axis A3, for a roughing and finish of the edging of the ophthalmic lens L1 to be machined. These different grinding wheels are each adapted to the material of the cut-out lens and the type of operation performed (roughing, finishing, mineral or synthetic material, etc.).

  The grinding wheel is attached to a common shaft of axis A3 ensuring their rotational drive during the edging operation. This common shaft, which is not visible in the figures shown, is rotated by an electric motor 620 driven by the electronic and computer system.

  The wheel train 614 is also movable in translation along the axis A3 and is controlled in this translation by a drive motor. Concretely, the entire wheel train 614, its shaft and its motor is carried by a carriage 621 which is itself mounted on slides 622 secured to the frame 601 for sliding along the third axis A3. The translational movement of the wheel trolley 621 is called transfer and is denoted TRA in FIG. 3. This transfer is controlled by a motorized drive mechanism (not shown), such as a screw and nut or rack system, driven by the central electronic and computer system.

  In order to allow a dynamic adjustment of the distance between the axis A3 of the grinding wheels 614 and the axis A2 of the lens during the edging, the pivoting capacity of the lever 611 around the axis A1 is used. effect a displacement, here substantially vertical, the L1 lens sandwiched between the shafts 612, 613 which brings the lens closer to or away from the grinding wheels 614. This mobility, which allows to restore the desired shape of edging and programmed in electronic and computer system, is called restitution and is noted RES in the figures. This RES restitution mobility is controlled by the central electronic and computer system.

  The grinder 610 comprises, for this restitution, a rod 616, which, articulated to the frame 1 around the same first axis A1 as the rocker 611 at one of its ends, is articulated, at the other end, according to a fourth axis A4 parallel to the first axis A1, to a nut 617 movably mounted along a fifth axis A5, commonly called restitution axis, perpendicular to the first axis A1, with intervening between this link 616 and the flip-flop 611, a contact sensor. This contact sensor is, for example, consisting of a Hall effect cell or a single electrical contact. It may also consist of a strain gauge.

  The nut 617 is a screw-threaded nut threaded with a threaded rod 615 which, aligned along the fifth axis A5, is rotated by a rendering motor 619. This engine 619 is driven by the central electronic and computer system. T was noted the pivoting angle of the flip-flop 611 about the Al axis relative to the horizontal. This angle T is associated with the vertical translation, denoted R, of the nut 617 along the axis A5. When, duly sandwiched between the two shafts 612, 613, the ophthalmic lens L1 to be machined is brought into contact with the grinding wheel 614, it is the object of an effective material removal until the latch 611 abuts against the rod 616 following a support which, being at the contact sensor, is duly detected by it.

  For the machining of the ophthalmic lens L1 along a given contour, it suffices, therefore, firstly to move the nut 617 along the fifth axis A5, under the control of the motor 619, to control the restitution movement. and, on the other hand, to jointly rotate the support shafts 612, 613 about the second axis A2, in practice under the control of the motor that controls them. The transverse restitution movement RES of the flip-flop 611 and the rotational movement ROT of the shafts 612, 613 of the lens are controlled in coordination by an electronic and computer system (not shown), duly programmed for this purpose, so that all the points the contour of the ophthalmic lens L1 are successively reduced to the correct diameter.

  The grinder illustrated in FIG. 3 further comprises a finishing module 625 which embeds chamfering and grooving grinders 630, 631 mounted on a common axis 632 and which is movable according to a degree of mobility, in a direction substantially transverse to the axis A2 of the trees 612, 613 for maintaining the lens as well as the axis A5 of the restitution RES. This degree of mobility is called retraction and is noted ESC in the figures.

  In this case, this retraction consists of a pivoting of the finishing module 625 around the axis A3. Specifically, the module 625 is carried by a lever 626 integral with a tubular sleeve 627 mounted on the carriage 621 to rotate about the axis A3. For the control of its pivoting, the sleeve 627 is provided, at its end opposite the lever 626, a toothed wheel 628 which meshes with a pinion (not visible in the figures) fitted to the shaft of an electric motor 629 integral with the trolley 621.

  In summary, it can be observed that the degrees of mobility available on such a trimming grinder are: the rotation of the lens making it possible to rotate the lens around its axis of maintenance, which is generally normal to the general plane of the lens, restitution, consisting of a transverse relative mobility of the lens (that is to say in the general plane of the lens) relative to the grinding wheels, making it possible to reproduce the different rays describing the contour of the desired shape of the lens, the transfer, consisting of an axial relative mobility of the lens (that is to say, perpendicular to the general plane of the lens) relative to the grinding wheels, to position the vis-à-vis lens and the cutting wheel chosen.

  the retraction, consisting of a transverse relative mobility, in a direction different from that of the restitution, of the finishing module with respect to the lens, to put in position of use and store the finishing module.

  In this context, the module 625 is provided with a drill 635 whose spindle is equipped with a mandrel 636 for fixing the drilling tool 800 according to a drilling axis A6.

  This mandrel 636 is a chamfered hole adapted to accommodate a threaded end 823 of the drilling tool 800. The clamping of the drilling tool 800 is not a radial clamping but a simple axial screw-type clamping. This clamping allows the rotary drive of the piercing tool 800 when the mandrel 636 rotates in a direction of rotation, and the disassembly of the piercing tool 800 when the mandrel 636 rotates in the other direction of rotation. The mandrel 636 furthermore comprises an axial abutment end of assembly. This abutment makes it possible, on the one hand, to stop the rotation of the drilling tool 800 in the mandrel 636 so as not to damage the screw threads, and, on the other hand, to stop precisely in translation the drilling tool 800 in the mandrel 636 in order to know its exact position.

  The drill 635 is mounted on the module 625 so as to pivot about an axis of orientation A7 substantially transverse to the axis A3 of the grinding wheels 614 as well as to the axis A5 of restitution and, consequently, substantially parallel to the direction of rotation. ESC retraction of the module 625. The drilling axis A6 is thus orientable about the axis of orientation A7, that is to say in a plane close to the vertical.

  This pivoting orientation of the drill 635 is noted PIV in the figures. This is the only degree of mobility dedicated to drilling.

  The integration of the drilling function within an edging machine, however, implies that the drilling tool 800 is suitably positioned opposite the position of the hole to be drilled on the lens. This positioning is achieved by means of two pre-existing degrees of mobility, independently of the drilling function, which are the retraction ESC on the one hand and the transfer TRA on the other hand. These two degrees of mobility, retraction and transfer are furthermore used to achieve an orientation of the drilling axis A6 of the drill 635.

  The adjustment of the orientation of the drilling axis A6 of the drill 635 around the axis A7 is carried out with the means and in the manner described below with reference more particularly to FIG. 4.

  For its pivoting mounting on the module 625, the body 634 of the drill 635 has a cylindrical shaft A7 shaft which is pivotally received in a bore of the same axis A7. The drill 635 can thus pivot about the axis of orientation A7 over a range of angular positions delimited by two angular stops integral with the body of the module 625. This pivoting is further braked permanently by friction braking means, for example drum brake type. The braking obtained must be sufficient to withstand the torque generated during drilling by drilling forces.

  In the example illustrated, the adjustment means comprise, on the one hand, a finger 638 secured to the body 634 of the drill 635 and provided with a spherical end 639 and, on the other hand, a plate 650 carrying a path of cam 651 and integral with the frame 601 of the grinder.

  The cam path 651 is constituted by a trench formed in recess of the useful face 658 of the plate 650. This trench 651 is adapted, during the drilling of a lens, to very precisely adjust the orientation of the drill 635. finger 638, during a drilling, is indeed inserted in this cam path to obtain a significant drilling accuracy.

  Moreover, the finger 638 may not be disposed in the cut 651 so that the drill 635 is pivotable at an angle sufficient for the drilling axis A6 to be perpendicular to the axis A3, that is to say - say substantially vertical.

  An alternative embodiment of the adjustment of the orientation of the axis A6 of the drilling tool 800 of the drill is shown in Figures 16 and 17. In this variant, the elements of the grinder identical to those of the main embodiment. described and illustrated in FIGS. 1 to 15 have been designated by the same reference numerals.

  Only the means for adjusting the orientation of the drill 635 have been modified here. These include a lever 600 which is integral with the body 634 of the drill 635 and which extends longitudinally in a direction transverse to the axis of orientation A7 and forming an angle of between 30 and 50 degrees with the drilling axis A6 of the drilling tool 800. This lever 600 is adapted to come opposite a fixed toggle stop 661 associated with the frame 601 of the grinder, after the module 625 has been brought into the appropriate position in favor of its ESC retraction movement.

  To place the lever 600 and the abutment 661 in the relative position of mutual engagement, the electronic and computer system controls the retraction pivot ESC of the module 625 for this purpose. The lever 600 then extends obliquely with respect to the transfer direction TRA.

  Then, the electronic and computer system controls the transfer transfer TRA wheels 614 and 625, so that the lever 600 engages with the abutment 661 and, sliding on this stop, causes by a ramp game the pivoting of the lever 600 and hence the body 634 of the drill 635 which it is secured. The transfer movement TRA is stopped when the desired orientation of the drilling axis A6 is obtained and the lever 600 is then disengaged from the abutment 661 by an ESC retraction pivot opposite to that which allowed the engagement. It should be noted that this mode of adjustment of the orientation of the drilling tool 800, by the tilting-sliding action of the ramp-lever 600 against the abutment 661, makes it possible to obtain an orientation adjustment on a wide angular movement and allows in particular to accurately adjust the orientation of the drilling tool 800 for unloading in the tool holder 900.

  As shown in FIG. 8, in the main embodiment, the piercing tool 800 is composed of a base 820 and a cutting part 830. The cutting part 830 is a drill capable of piercing the glass. The base 820 comprises meanwhile, on the one hand, the cylindrical and threaded end 823 adapted to be screwed into the mandrel 636 of the drill 635, and, on the other hand, between this end 823 and the cutting part 830, a cylindrical portion of a diameter greater than the diameter of the end 823 provided with splines 821. These splines are adapted to cooperate with other grooves in order to lock the drilling tool 800 in rotation.

  Advantageously, the end 823 has a diameter substantially greater than the diameter of the cutting portion 830. Thus, if the drilling tool 800 breaks, it breaks at the cutting portion 830. Therefore, when the tool is breaks, the grooves 821 and the end 823 remain intact, thus allowing disassembly of the tool regardless of its state.

  Moreover, this end 823, like the whole of the drilling tool 800, has a precisely known length. Therefore, when the piercing tool 800 is disposed in the mandrel 636, the exact position of the end of the cutting portion 830 is known.

  Combined means of reception and of first and second transfers The means of reception and of first and second transfers 2 take the form of a carousel which is more particularly described with reference to FIGS. 6 to 9 and which comprises: a plateau of loading and unloading 30 mounted on the common chassis to rotate, under the control of control means (in this case an electric motor not shown) controlled by the electronic and computer system 100, about an axis of rotation substantially through its center and perpendicular to the plane of this plateau; a support frame 31 integral with the common frame; reception seats 34, 35 on which the lenses LI and L2 or the tool holder 900 are intended to rest when they are loaded on the plate 30.

  on the loading and unloading platform 30, at least three loading places 36 to 38 and at least four unloading spaces 41 to 44.

  immobilizing means 32 of the lenses L1 and L2 or of the tool holder 900 loaded on the plate 30 at the loading places 36 to 38.

  In the illustrated example, the loading places 36 to 38 are constituted by a corresponding number of indentations or recesses. These three notches 36 to 38 are identical and each have a substantially circular shape with a diameter slightly greater than the standard diameter of the L1 and L2 lenses to be cut about 75 millimeters. The three indentations are arranged emerging on the periphery of the loading and unloading tray 30. These openings allow access to at least two seats 34, 35 on which the lenses to be cut. Next to the loading places 36 to 38 are articulated clamps 32 constituting the means for immobilizing the lenses (Figures 8 and 9).

  According to FIGS. 6 to 9 and in particular to FIG. 7, which in itself gives a detailed description of the plate 30, the four unloading places 41 to 44 consist of recesses or cuvettes formed on the surface of the plate 30. Hollow or depressions are circular in shape of diameter always greater than that of the lenses LI and L2 before trimming.

  Virtually radial slots 45 are provided from the center of each unloading cavity 41 to 44 to the peripheral edge of the plate on which these openings open. These lights are intended to allow the removal and deposition of the lens or the tool holder 900 by the means of third and fourth transfer, as we will see later.

  The immobilizing means 32 of the lenses or the tool holder 900 comprise clips 46 to 48 which are each located directly above the loading places 36 to 38. These clips each comprise two branches 50 and 51 whose feet 53 are articulated on a hub 54 and whose free ends 55 are provided with articulated fingers 56 in the general shape of V. The hub 54 is rotationally integral with the loading and unloading platform 30 so that the clamps 46 to 48 are rotated simultaneously to the board. Each of the clamps thus remains opposite each of the loading places 36 to 38 respectively.

  The clamps 46 to 48 are biased in the closed position by an elastic member such as a return spring 57 placed between the legs 53 of the two branches 50, 51 of each clamp.

  In addition, the seats 34, 35 are mounted on the frame 31 so as to be vertically movable, like an elevator, between a high position in which the upper face 70 of the seats is in the vicinity of the fingers 56 of the clamps 46. 48, and a low position, wherein the upper face of these seats is spaced from said fingers 56. Thus, the seats 34 and 35 are in the high position when lenses are loaded on the plate 30 to be immobilized by the clamps, and are in the low position when the lenses were gripped by the clamps to be taken to the next station, namely the measuring device 5. In the low position, the seats 34 and 35 are erased to allow free movement of the clamps and lenses.

  These combined means of reception and first and second transfers 2 are designed to load and transfer ophthalmic lenses not cut off. Advantageously, an ophthalmic lens may be replaced by a tool holder 900 having dimensions and a weight comparable to those of a non-cut-out lens. It is therefore possible to use these combined means of reception and first and second transfers 2 for the transfer of the tool holder 900.

  Preferably, the measuring device 5 and the probing, gripping and third transfer means 7 are located side by side and diametrically opposite to the access door 26. The measuring device 5 is at least partly located in line with the path traveled by the loading places 36 to 38 and unloading 41 to 44 so that the lenses L1, L2 and the tool holder 900 remain supported by the loading and unloading platform 30 when determining their characteristics.

  In addition, the trimming and drilling device 6 is placed adjacent to the loading and unloading platform 30, and the probing, gripping and second transfer means 7 are interposed between the measuring device 5 and this clipping device. and drilling 6.

  Combined means of probing, gripping and third transfer After the determination of certain characteristics of the lens L1 by means of the measuring device 5 according to the method described at the beginning of the present description, the loading and unloading platform 30 is again rotated to bring, in a second transfer, the lens L1 facing the probing means, gripping and third transfer 7. The lens L1 is then in said intermediate position.

  These probing, gripping and third transfer means 7 take the form of a member or arm ensuring on the one hand the probing of the lenses L1 and L2 and on the other hand the manipulation of these lenses with a view to their transfer (third transfer) to the trimming and drilling device 6.

  For this purpose, the probe, gripping and third transfer arm 7 has a wrist 81 movable relative to the common frame according to five controlled axes, with a horizontal translation along the X axis, a vertical translation along the Z axis three rotations around the axes X, Y, Z. The control of these axes of mobility is achieved in this case by motorized electric means. But the skilled person may provide for the implementation of other control means such as pneumatic or other means. Whatever the nature, the control of these five axes of mobility is controlled by the electronic and computer system 100.

  In practice, the wrist 81 is hingedly mounted on a bearing stub 80 so as to be pivotable relative thereto along the X and Y axes. The stump is itself mounted to move in vertical translation along the Z axis on a vertical beam 82 forming for this purpose slide. This vertical beam 82 is carried at its lower end by a turret 82.1 which is rotatably mounted along the axis Z on a carriage 84. This carriage is mounted on a horizontal beam 83, associated with the common frame and forming a slide, for sliding according to the X axis. The beam 83 is for example integral with the frame 31.

  These five degrees of freedom of the wrist 81 in the fixed frame of reference (X, Y, Z) are controlled by various electric motors controlled, via an electronic card of appropriate power, by the electronic and computer system 100. This is how the rotations wrist 81 relative to the stump 80 around the X and Y axes are respectively controlled by motors 105, 106. The vertical sliding of the stump 80 is controlled by a motor associated with the beam 82 and driving a screw 108 engaged in a solidarity nut of the stump 80. The rotation of the turret carrying the vertical beam 82 around the vertical axis Z is controlled, via a belt, by a motor whose body is secured to the carriage. Finally, the horizontal sliding of the carriage is controlled by a motor associated with the horizontal beam 83 and driving a screw 113 engaged in a nut secured to the carriage.

  To allow the separate probing functions on the one hand and gripping on the other hand, the wrist 81 of the arm 7 is provided with probing means and gripping means 86 which are separate and independent of each other.

  The probing means are arranged to feel independently or jointly the two main faces of the lenses L1, L2.

  Alternatively, in order to locate the reference frame of the tool holder 900, these probing means are able to palpate the two faces of the tool holder 900 in order to locate the permanent markers 16, 17 etched on the tool holder 900 and to measure the dimensions of the thicknesses 922. This variant of registration of the reference frame of the tool holder 900 then replaces the step of optical registration by the measuring device 5.

  The gripping means 86 take the form of a locking clamp which consists of an upper jaw 95 and a lower jaw 96 movable in translation or pivot facing each other. In the example shown, the lower jaw 96 is movably mounted on the wrist 81 to slide on a rail in the same direction of translation as the probe branch 90 and is for example driven in translation through a mechanism. screw-nut driven by an encoder motor integrated in the wrist casing 81. The upper jaw 95 is fixed mounted on the wrist 81.

  The jaws 95, 96 are of substantially rectilinear shape, generally parallel to the probing branches 90, 91, and are provided at their free end with means for releasably fastening by clip (clipping means) 97, 98 which here have the form of an open elastic ring C-shaped forming a clip. These clipping means are intended to accommodate noses 101, 102 for gripping and locking the lens.

  The pair of noses 101, 102 thus mounted at the end of the gripping jaws 95, 96 makes it possible to perform the gripping and, later on the clipping means, the sandwich locking of a lens. In general, each nose has on the one hand axial fixing means and on the other hand transverse fixing means. Both noses are transferred, by means of the probe arm, gripping and second transfer 7, with the lens that they carry or block, from the carousel of reception and first transfer 2 to the device of clipping and drilling 6 This is the third transfer of the lens concerned, as is better explained later in the context of the description of the preparation process.

  However, attention is now drawn to an important characteristic of double interoperability of each nose: the transverse fixing means are arranged to cooperate with the arm 7 and the axial fixing means are arranged to cooperate with the shafts 612, 613 of clamping and rotating drive the grinder. The noses 101, 102 thus have a dual function. When they are associated with the arm 7, they constitute gripper tips for gripping and transferring the lens. When they cooperate with the shafts 612, 613 of the grinder, they constitute stops for locking and driving in rotation of the lens. We understand the major advantage of this third transfer of the lens operated with the nose in engagement with the lens: it avoids any loss of reference.

  The nose 101, 102 are able to be transferred to the clipping means with the lens they grab and then realize without further repositioning of the lens blocking on the clipping means.

  As mentioned above, the noses 101, 102 exert a dual function. They are first used to perform the gripping of the lens or the tool holder 900 from its loading location on the plate 30 of the carousel of first and second transfers 2, when they present the lens in the intermediate position. Then, the lens or the tool holder being thus grasped, by means of the noses 101, 102, by the probing, gripping and third transfer arm 7 the latter operates the third transfer of the lens or the tool holder 900 towards the clipping and drilling means 6. When the lens or the tool holder 900 is supported by these clipping means (relay passage), the noses retain a role of clamping the lens or the tool holder 900 and then exert a second function, derived from the first, which consists in making the locking of the lens or the tool holder 900 in view of either the machining of the lens in cooperation with the clamping shafts and rotating drive of the means for trimming and drilling 6, or a change of drilling tool 800. The nose then constitute drive stops forming an integral part of the trimming and drilling means 6.

  This double function, gripping on the one hand and blocking on the other hand, results in the presence on the nose 101, 102 of a double mechanical interface: - the transverse one (that is to say operating transversely to the axis of the nose which merges with the axis AB of tightening the nose) to cooperate with the removable fastening means by clip (clipping means) 97, 98 gripping jaws 95, 96 in order to achieve a fixation temporary noses 101, 102 on said jaws, - the other axial (that is to say operating along the axis of the nose which merges with the axis of the shafts 612, 613 of the clipping and drilling means 6 ) to cooperate with the shafts 612, 613 of the trimming means in order to achieve a firm axial clamping of the lens or the tool holder 900 sandwiched between the noses 101, 102 with a transmission without sliding of the rotation torque of the shafts. the lens or tool holder 900.

  Thus, in the example illustrated, for the removable attachment of each nose 101, 102 on the corresponding jaw 95, 96, the clipping rings 97, 98 cooperate with receiving notches arranged in correspondence on the nose 101 , 102 transversely to the axis of the nose.

  Thus, when the noses are attached to the jaws 95, 96, their axis is parallel to the direction of translation of the jaws, which corresponds to the clamping direction. The two noses are thus turned toward each other, with their application surfaces facing each other, when they are attached clipped on the ends of the gripping jaws 95, 96. The two noses 101 and 102 can then be brought closer to each other or apart to seize or release a lens or a tool holder.

  For its mechanical interfacing with the shafts 612, 613 of the trimming and drilling means 6, each of the noses 101, 102 cooperates with the free end of the shaft 612, 613 corresponding by an interlocking system with male and female parts complementary forming, by form cooperation, a rotation drive without play.

  The preparation preparation device 1 also comprises a nose magazine 130 placed in the vicinity of the probe arm, gripping and transfer 7. This store tiered housing three pairs of nose or more adapted to different kinds of lenses.

  These combined probing, gripping and third transfer means 7 are therefore designed to operate with non-cutout ophthalmic lenses. The tool holder having a shape and dimensions substantially equal to those of a non-cut-out lens, these means are able to operate with the tool holder 900.

  Thus, the probing means, gripping and third transfer 7 are designed and arranged to achieve the docking of the locking nose against both sides of the tool holder. A pair of noses 101, 102 is defined in the electronic and / or computer system as being the pair most suitable for gripping the tool holder 900.

  The measuring device 5 having determined that the object was a tool holder 900, the probing operation is not performed on the tool holder. The transfer of the tool holder is performed with the means used for the transfer of an ophthalmic lens. These means are suitable for carrying out the transfer of the tool holder insofar as the clamping force of at least 200 N is sufficient to hold it firmly. These means are further designed to allow the electronic and computer system to follow the reference of the tool holder 900.

  According to an alternative embodiment of the invention, it is also possible to mechanically store the reference frame of the tool holder 900 in memory. For this purpose, an acorn similar to the reference acorns commonly used for locking the lenses can be attached to the door. 900 tool (for example by gluing) or can come from material with the rest of the tool holder 900. Its shape and its position then provide a reference memory function.

  Electronic and computer control system The device 1 comprises an electronic and computer control system 100 consisting here of an electronic card designed to coordinate control of the measuring means, the clipping device, the means of reception and first and second transfers and the probing, gripping and third transfer means for the automatic processing of a lens or a tool holder, in accordance with the automated processing method of the toolholder which will be explained later.

  The electronic and computer system 100 comprises for example conventionally a motherboard, a microprocessor, a random access memory and a permanent mass memory. The mass memory contains a program for executing the automated assembly preparation method which will be described later. This mass memory is preferably rewritable and is advantageously removable to allow its rapid replacement or programming on a remote computer via a standard standard interface.

  Capotaqe and access control As shown more particularly in Figure 2, the mounting preparation device 1 is enclosed in a cowling 20 which prevents inadvertent access to all the constituent parts of this device.

  The cowling is in the form of a housing which has a front face 21 and an opposite rear face 22. The front face 21 is intended to be placed facing the operator and has an upper portion 23 and a lower portion 24 substantially vertical, these two parts 23 and 24 being separated by a substantially horizontal flat surface 25.

  An access door 26 is articulated on the flat 25, between a horizontal closed position and a vertical open position. Only this access door 26 mounted articulated on the cowling 20 allows, in the open position, access to the means of reception and first transfer 2, as will be better explained later.

  The device thus makes it possible to automate all operations, avoiding any intervention by the operator, and thus to minimize risks.

  Tool Holder As shown more particularly in Figures 10 and 11, the tool holder 900 according to the present invention is in the form of a cylinder of low height. The diameter of the cylinder corresponds substantially to the diameter of an ophthalmic lens not cut off. It is therefore less than 70 mm. Its height does not exceed 20 mm so that the gripping means of the trimming device and drilling 6 are able to cooperate with the tool holder 900. The tool holder 900 has two faces 901A, 901B and a slice 902. The central zones of the two faces 901A, 901B are structurally reinforced so that they are able to be clamped without deforming in the support means which are in particular the probing, gripping and third transfer arms 7 and the shafts. The central zones thus correspond to the fastening portions 910A, 910B of the two faces 901A, 901B of the tool holder 900.

  The tool holder 900 is more particularly composed of two half-cylinders 905A, 905B of substantially equal heights, intended to be welded to one another. These two half-cylinders 905A, 905B are substantially identical. They comprise a flat face 901A, 901B and a 902A, 902B wafer. The side of each half-cylinder 905 opposite the flat surface 901A, 901B has various reliefs.

  Among these reliefs, it is possible to distinguish reinforcing reliefs 990 of the tool holder 900, and reliefs describing two receiving portions 999 that can each accommodate a piercing tool 800. The reinforcing reliefs 990 allow the attachment portions 910A, 910B to support forces of the order of 1000 N without the tool holder 900 is deformed. The receiving portions 999 are diametrically opposed and open on the edge 902 of the tool holder 900.

  These host portions 999 have three functional portions disposed along an axis.

  The first part, the most at the center of the tool holder 900, is a spring blade 930 against which is intended to bear the end of the cutting portion 830 of the drilling tool 800. This blade spring 930 is therefore adapted to block the drilling tool 800 in translation along its drilling axis A6, in a first direction, that is to say towards the center of the tool holder 900.

  The second part, adjacent to the first, is a duct 940 of diameter slightly greater than the diameter of the cutting portion 830 of the drilling tool 800, wherein is intended to be housed this cutting portion 830.

  Finally, the third portion, adjacent to the second and opening on the edge 902 of the tool holder 900, is a hole having a cylindrical shape with a diameter greater than the outer diameter of the support 820 of the drilling tool 800. rotation stop means of the drilling tool 800. These means consist of splines 950 able to cooperate with the splines 821 of the drilling tool 800. This third part also bears two spring clips 920 intended to block the drilling tool 800 in translation along its axis of drilling A6 in a second direction, that is to say towards the edge 902 of the tool holder 900.

  The first two parts have particular dimensions. A single drilling tool 800, of appropriate diameter and length, is therefore adapted to be housed in each receiving part 999. These first two parts therefore form polarizing means, thus preventing the optician from placing a dispensing tool. inappropriate dimensions in the tool holder 900.

  Moreover, the faces 901A, 901B carry, in line with each receiving portion 999, 922 square oversizes. These oversizes 922 are discriminating marks, the dimensions of which, determined by the measuring device 5, indicate the dimensions of the drilling tool 800 that the receiving part 999 carries.

  Alternatively, the tool holder 900 may comprise more than two home portions 999. The dimensions of the three portions constituting a home portion 999 are then variable from one housing to another. Thus, the tool holder 900 can carry drilling tools 800 of various sizes.

  For example, the tool holder 900 may comprise two pairs of receiving portions 999, each pair of receiving portions having identical dimensions adapted to accommodate the same type of drilling tool 800. In this example each pair of receiving portions 999 has an empty receiving portion 999 capable of accommodating a used piercing tool and a receiving portion 999 in which a piercing tool 800 is disposed. Depending on the dimensions of the tool used worn by the mandrel 636, one or other of the empty reception parts is then presented in front of the mandrel for unloading the used drilling tool, then, depending on the diameter of the hole to be drilled in the lenses either of the host portions 999 carrying a tool is presented in front of the mandrel 636 for loading this tool. It is then advantageously possible to adapt the drilling tool to the diameter of the hole to be made.

  In Figures 15A and 15B, there is shown an alternative embodiment of the drilling tool 800 '. It comprises here a base 820 'for receiving the chuck 636 and a drill bit comprising a cutting portion 830' and a gripping portion 831 'connected to the base 820'.

  The base 820 'generally has a cylindrical shape. Its lateral surface 825 'carries in particular at least two opposite flats. Its rear face is pierced by a threaded blind bore 824 'intended to receive, by screwing, the mandrel 636. This threaded blind bore 824' opens, on its rear face, on a conical bore 823 'intended to facilitate the insertion of the mandrel 636 in said threaded blind bore 824 '. Moreover, on its front face, the base 820 'is pierced with a bore 821' of diameter equal to the diameter of the gripping portion 831 'of the drill.

  For mounting the piercing tool 800 ', the gripping portion 831' is inserted into the through bore 821 'and then welded to the base 820' so that the gripping portion 831 'is partly disposed in the center of the hole. 'threaded blind bore 824'.

  According to this variant embodiment, the tool holder 900 has housings 999 free of grooves 950. These housings 999, on the other hand, comprise two internal reliefs defining flat surfaces adapted to cooperate with the flats of the piercing tool 800 'for stopping it. in rotation.

  The mandrel 636 also has, in this embodiment, a different shape. It has indeed a threaded cylindrical end adapted to cooperate with the threaded blind bore 824 '. This cylindrical end is pierced with a bore adapted to receive the gripping portion 831 'of the drill bit.

  OPERATION (AUTOMATED PROCESSING METHOD) The editing preparation device which has just been described is implemented according to an automated method which will now be described.

  According to a specific feature of the invention, it is proposed a treatment of the tool holder 900 with the only means for the treatment of an ophthalmic lens LI for its drilling and trimming. The proposed device is designed to treat one or more ophthalmic lenses and has no additional means, except the tool holder 900, for making a change of drilling tool 800 when the latter is damaged or broken.

  Automated preparation for the preparation of an iob (first iob J l) Generically, the processing of a tool holder 900 is broken down according to the following steps.

  Step 1.1 Presentation of the loading and unloading platform 30 in the loading position.

  If necessary, the electronic and computer system 100 controls the rotation of the loading and unloading platform 30 to have two free loading places 36, 37 facing the access door 26.

  Step 2.1 Opening the access door 26.

  Initially, the access door 26 is held closed. The opening of the access door of the device is performed at the request of the operator and is authorized by the electronic and computer system 100 restrictively during the loading and unloading steps which will be exposed later.

  Step 3.1 Loading the tool holder 900.

  As can be seen in FIG. 2, the loading and unloading platform 30 is rotated to occupy marked positions and in particular a loading position in which only two loading places 36 and 37 and two unloading places 41 and 42 are accessible to the operator after opening the access door 26. The third loading place 38 and the other two unloading places 43, 44 are hidden by the rest of the cowling 20. The operator can not be wrong in loading and unloading the tool holder 900 on and off the tray 30.

  In this marked loading position, the clamps 46 and 47 corresponding to the loading places 36 and 37 are open and the two seats 34, 35 are in the high position. In this high position, the seats 34, 35 laterally mask the clamps 46, 47 and thus prohibit in combination with the cowling 20, on the one hand any inadvertent manipulation of these clamps by the operator, and on the other hand any intrusion of object inside the device, which could damage its moving internal components.

  It is thus possible to load the tool holder 900 on a support zone of the upper faces 70 of the seats 34 and 35. In order to better ensure the stable and horizontal seating of the tool holder 900, two beads 75, 76 are provided. in the bottom of the central groove 71.

  In practice, the tool holder 900 is manually deposited by the operator on one of the two loading places 36, 37 of the loading and unloading platform 30 accessible through the access door 26. This is where the only physical intervention of the operator on the tool holder. Of course, an automated loading of the tool holder 900 can be envisaged.

  Step 4.1 Lower the seats and pinch the lenses.

  The two seats 34 and 35 are then controlled to move to their lower position in which the tool holder 900 is located at the fingers 56 of the respective clamps 46 and 47. These clamps are then controlled in the closed position so that the one of the flanges of the fingers 56 encloses the tool holder 900.

  When closing the clamps 47, the jig 69 of the clamp moves inside the groove of the seat 35 during closing and rotation of the clamps, so that the clamps 47 grip the slice 902 of the door 900 tool over its entire thickness overflowing on both sides of it. It is understood in particular that the overflow of the clamps on either side of the edge of the tool holder 900 ensures a secure and firm grip of the latter.

  The clamp 46,48 corresponding to the other two 38,34 loading places remain in closed position (recalled by the elastic means 57).

Step 5.1 Lowering the seat 35.

  The tool holder 900 being grasped by the clamps, the seat is retracted further downwards in the manner of an elevator or elevator to avoid any friction during the next step.

  Step 6.1 First transfer of the tool holder 900: rotation of the loading and unloading tray 30 for passage of the tool holder 900 in the measuring device 5.

  The assembly of the plate 30 and the clamps 46 to 48 is simultaneously rotated to bring the tool holder 900 towards the measuring device 5. This rotation of the plate 30 takes place, seen from above, in clockwise and under the control of the electronic and computer system 100.

  Step 7.1 Reading the tool holder 900 by the measuring device 5.

  The geometrical and optical analysis of the tool holder 900 by the measuring device 5 is carried out automatically in accordance with the description that has been made previously to provide the electronic and computer system 100 with data mainly relating to the reference frame of the carrier. tool 900 (center and orientation). These locating features are stored by the electronic and computer system 100.

  In particular, the acquisition of the locating characteristics indicated above will make it possible, in conjunction with the geometrical data of the tool holder 900 known from the electronic and computer system 100, to determine the exact point of gripping and locking of the tool holder 900 on the carousel of the reception means and first and second transfers 2 brought to the intermediate position (as explained below) and to determine the parameters of change of drilling tool to drive accordingly the clipping and drilling device 6.

  Step 8.1 Second transfer of the tool holder 900: rotation of the loading and unloading tray 30 to reach the probing position of an ophthalmic lens.

  The plate 30 is rotated in the clockwise direction to place the tool holder 900 in a so-called intermediate position in which the tool holder 900 is close to the arm 7 so as to be accessible to this arm for its grip, as we know it. will see in the following steps. During this second transfer, the rotation of the plate 30 is controlled and monitored by the control electronics in rotation of the plate 30 and is stored in a memory of the electronic and computer system 100. Together, the position and the axis of the carrier tool 900 measured by the measuring device 5 during the previous step are tracked and stored in memory.

  It will be observed that the electronic and computer system 100 having in memory that the object transferred is a tool holder 900, the tool holder 900 passes through a probing position without being probed. The tool holder passage 900 is constrained to move into this probing position since its transfer exclusively uses the transfer means of an ophthalmic lens.

  Step 9.1 Rotation of the loading and unloading tray 30 for presentation of the tool holder 900 in the intermediate position for its gripping by the probing, gripping and third transfer arm 7 (end of second transfer).

  Step 10.1 Selection and clipping of the machining noses by the probing, gripping and third transfer arm 7 in the nose magazine.

  Step 11.1 Tool Holder by Probe, Gripper and Third Transfer Arm 7.

  After rotating the plate, the probing, gripping and third transfer arm 7 sandwiches the tool holder 900 between the two noses 101 and 102.

  A blocking axis AB is defined as being the normal axis at the front face of the tool holder 900 and passing through its center. In order to avoid positioning errors, the upper nose catches the front face of the tool holder 900 in translation along this blocking axis AB and remains pressed against the tool holder 900 while being wedged on this axis. The docking is then carried out with an overall and simultaneous contacting of all the points of the application surface of the nose 101 with the face facing the tool holder 900, without tilting. There is thus no offset error or angular tilting when docking this nose against the tool holder 900.

  The two nose 101,102 are then precisely implanted on the tool holder 900 which is firmly maintained. This results in a stable and precise locking of the tool holder along the locking axis, without geometric error.

  It will be observed that at this point of grasping the tool holder by the gripping means, the reference system of the tool holder, which defines its centering and its orientation (or axis) and which has been measured by the measuring device 5, has has been preserved or monitored by the electronic and computer system 100 during the second transfer of the tool holder 900 by the plate 30 between the measuring position and the intermediate position. The nose, whose attachment geometry on the jaws 95, 96 of the arm is perfectly known by construction, are therefore implanted on the tool holder to grip it according to a geometry (positioning in the plane of the tool holder and orientation) known with respect to the reference frame of the tool holder.

  Step 12.1 Opening the gripper in charge of the tool holder 900 on the plate.

  Step 13.1 Third transfer of the tool holder 900 for passage of relay from the carousel to the support means.

  The tool holder 900 is then moved by the probing, gripping and third transfer arm 7 (FIG. 7) to be removed from the loading and unloading tray 30. Then, according to the invention, this tool holder 900 is transferred by this member 7 to the trimming and drilling device 6, as shown in Figure 12.

  FIG. 13 illustrates the final phase of the transfer during which the tool holder 900 is at the same time held by the probing, gripping and third transfer arm 7, and by the shafts 613, 612 of the clipping and defrosting means. In this state, the noses 101, 102 are held by transverse clipping by the upper jaws 95 and lower 96 of the wrist 81, and by axial locking by means of the shafts 613, 612, the shafts 613, 612 now sandwiched together. the two noses 101, 102 and, in the center, the tool holder 900.

  The transverse shrinkage of the wrist is then controlled to disengage the jaws 95 and 96 out of the noses 101, 102 so that the tool holder 900 simply remains engaged between the nose, on the trimming and piercing device 6. At during this transfer, there is no loss of reference since the noses remain permanently in the marked position and belong, in a way, both to the gripping arm and to the shafts and drive of the clipping device . Taking into account the storage of the repository of the tool holder 900 previously carried out, the electronic and computer system 100 derives the position and the orientation of this repository of the tool holder 900 in the repository of the clipping device.

  Step 14.1 Inserting the tool holder for unloading the drilling tool.

  The electronic and computer system 100 drives the clipping device 6 to place a first receiving portion 999 of the tool holder 900, host portion 999 which is empty, facing the mandrel. This placement is carried out using the locating features of the toolbar 900 provided by the measuring device 5. To achieve this placement, as shown in FIG. 3, the shafts 612, 613 rotate simultaneously according to the rotation ROT in order to place the first part. 999 of the tool holder 900 vertically, along an axis parallel to the axis A5 and down.

  Simultaneously, the shafts 612, 613 move along the axis A5, upwards, according to the restitution movement RES. The drill 635 has a pivoting movement PIV about the axis A7, a movement that makes it possible to place the drilling axis A6 parallel to the axis A5 so that the cutting portion 830 of the drilling tool 800 is arranged upwards.

  The first receiving portion 999 of the tool holder 900 and the piercing tool 800 thus have parallel axes. The tool holder 900 is also arranged in height so that it can not come into contact with the piercing tool 800.

  The objective is then to confuse the drilling axis A6 of the drilling tool 800 with the axis of the first receiving portion 999 of the tool holder 900. To perform this task, the electronic and computer system 100 driver TRA translation and ESC retraction.

  Step 15.1 Unloading the piercing tool.

  In order to dispose the used drilling tool 800 in the first receiving part 999 of the tool holder 900 (FIG. 14), the shafts 612, 613 move according to the axis A5, downwards, that is to say to the drilling tool 800, following a restitution translation RES. Simultaneously, the drilling tool 800 rotates along its drilling axis A6 at very low speed. This rotation has a direction of rotation opposite to the direction of rotation used during the drilling of a lens. The grooves 821 of the drilling tool 800 can thus engage without force in the grooves 950 of the tool holder 900. The restitution translation movement RES stops when the tool holder 900 comes into contact with the mandrel 636 The rotation of the drilling tool 800 about its drilling axis A6 then accelerates so that the threaded portion 823 of the drilling tool 800 is unscrewed from the mandrel 636. This unscrewing causes a movement for translating the drilling tool along the drilling axis A6 towards the inside of the tool holder 900. When the drilling tool 800 is almost completely clear of the mandrel 636, the end of its cutting part 830 bears down against the spring blade 930. Its support 820 is also clipped into the spring clips 920. The used drilling tool 800 is thus maintained in translation but also in rotation by the grooves in the tool holder 900. The mandrel 636 of the 635 drill is flush with it to the wafer 900. 902 of the tool holder order to clear completely the mandrel 636, the 612.613 trees shaper device and drilling 6 move along the axis A5, upwards, according to a refund translational RES.

  Step 16.1 Loading the piercing tool.

  In order to load a new drilling tool 800, the chuck 636 of the drill 635 reverses its direction of rotation while taking up a low speed of rotation about its drilling axis A6. Simultaneously, the electronic and computer system 100 controls the rotation of 180 about the axis A2 of the tool holder 900 by means of the shafts 612, 613 of the trimming and drilling device 6. This rotation makes it possible to arrange the second receiving part 999 of the tool holder 900 facing the chuck 636, 999 home part in which is disposed a new drilling tool 800. Then, in order to engage the drilling tool 800 in the mandrel 636, the shafts 612,613 of the trimming and drilling device 6 move along the axis A5, downwards, that is to say towards the mandrel 636, according to a translation of restitution RES. The mandrel 636 is thus engaged on the drilling tool 800. Its rotational movement around the drilling axis A6 allows the support 820 of the drilling tool 800 to be screwed into the mandrel 636 of the drill 635. torque corresponding to the torque of the drill 635, the tool is considered to be correctly fixed when the chuck stops rotating. The new drilling tool 800 is then in position on the drill 635, the shafts 612, 613 of the trimming and drilling device 6 move along the axis A5, upwards, according to a restitution translation RES. The force provided during this translation makes it possible to unclip the drilling tool 800 from the spring clips 920.

  Step 17.1 Positioning of the loading and unloading tray 30 for depositing the tool holder 900 by the probing, gripping and third transfer arm 7.

  The loading and unloading platform 30 is actuated in rotation so as to bring the unloading place opposite the trimming and drilling means 6, at a predetermined position at which the arm 7 will remove the tool holder 900.

  Step 18.1 Fourth transfer of the tool holder 900 for return passage of the tool holder 900 means for cutting and drilling the carousel.

  After the change of drilling tool, the tool holder 900 is again gripped by the probe arm, gripping and third transfer 7 to be deposited on one of the unloading places 41 to 44.

  Step 19.1 Deposit the tool holder 900 in place of unloading on the carousel tray.

  The arm descends to deposit the tool holder 900 on the plate. Then, the lower jaw 96 of the arm 7 loosens to release the tool holder 900 and the wrist 81 of the arm 7 is withdrawn radially outwardly to disengage the plate 30, leaving the tongue 49 to return to the outer cover position of the light 45.

  Step 20.1 Fifth transfer: rotation of the loading and unloading tray 30 for presentation of the tool holder 900 for unloading by the operator.

  Step 21.1 Opening the access door 26 for unloading the tool holder 900.

  The opening of the access door 26, to allow the operator to access the tool holder 900, is done at the request of the operator and under the control of the electronic and computer system 100 which does not allow the opening of the door that the plate 30 is in the loading and unloading position.

  Step 22.1 Unloading the tool holder 900 by the operator.

Claims (1)

  1. Device for trimming and drilling (6) an ophthalmic lens (LI), comprising: - support means (612, 613) able to clamp and rotate the lens (L1) along an axis of rotation (A2), means for trimming the lens (L1) installed on the support means (612, 613), - drilling means for the lens (L1) installed on the support means (612, 613), these piercing means comprising a mandrel (636) suitable for receiving a replaceable drilling tool (800), characterized in that it comprises a tool holder (900) comprising, on the one hand, at least one receiving part (999) of said piercing tool (800) and on the other hand, a fixing portion (910A, 910B) adapted to cooperate with said support means (612, 613) for clamping and driving in rotation of said tool holder (900).   2. Device for trimming and drilling (6) according to the preceding claim, wherein the tool holder (900) has substantially the shape and size of a lens (L1) before trimming comprising two faces (901A, 901B) and one slice (902).   3. Trimming and drilling device (6) according to one of the preceding claims, wherein each receiving portion (999) of the piercing tool is a housing.   4. Clipping device and drilling (6) according to the preceding claim, wherein each housing is radial and opens on the wafer (902) of the tool holder (900).   5. Trimming and drilling device (6) according to one of the preceding claims, wherein each receiving portion (999) comprises, on the one hand, rotation stop means (950) of the tool piercing means (800) and secondly translational stopping means (920, 930) of the piercing tool (800).   A method of loading and / or unloading an ophthalmic lens (L1) piercing tool (800) onto the mandrel (636) of an ophthalmic lens (L1) piercing and piercing device (6) according to one of claims 1 to 5, comprising fixing the fastening portion (910A, 910B) of the tool holder (900) on the support means (612, 613) and the transmission, for its loading or unloading, of the tool drilling (800) between the tool holder (900) engaged with the support means (612, 613) and the mandrel (636).   7. A method of loading and / or unloading according to the preceding claim, comprising the establishment of the receiving portion (999) of the tool holder (900) opposite the mandrel (636) of the clipping and drilling device (6) ophthalmic lens (L1).   8. A method of loading and / or unloading according to one of claims 6 and 7 applied to the replacement of the piercing tool (800), wherein the tool holder (900) having at least two receiving portions ( 999), including an empty first receiving portion (999) and a second receiving portion (999) on which a replacement piercing tool (800) is disposed, the method comprises the steps of: - securing the holder tool (900) on the support means (612,613), set up the first receiving part (999) of the tool holder (900) facing the mandrel (636), - transmit, for its unloading, the tool drilling (800) of the mandrel (636) to the tool holder (900), setting up the second receiving portion (999) of the tool holder (900) facing the mandrel (636), and transmitting, for its loading , the tool (800) for replacing the tool holder (900) with the mandrel (636).   12. A method of loading and / or unloading according to one of claims 7 and 8, wherein the establishment of a receiving portion (999) of the tool holder (900) facing the mandrel (636). involves the rotation of the support means (612,613) along the axis of rotation (A2) of the support means (612,613).   13. A method of loading and / or unloading according to one of claims 7 to 9, wherein the establishment of the receiving portion (999) of the tool holder (900) opposite the mandrel (636) makes intervening the relative translation of the mandrel (636) relative to the support means (612, 613) in a direction parallel to said axis of rotation (A2) of the support means (612, 613).   The method of loading and / or unloading according to one of claims 6 to 10, wherein the transmission of the piercing tool (800) between the tool holder (900) and the mandrel (636) involves the relative movement of the support means (612, 613) towards the mandrel (636).   12. A method of loading and / or unloading according to one of claims 6 to 11, wherein the mandrel (636) being rotatable about a drilling axis (A6), the method comprises the joining or the uncoupling of the piercing tool (800) relative to the mandrel (636) by screwing or unscrewing by means of the rotation of the mandrel (636) about its piercing axis (A6).   13. A method of loading and / or unloading according to one of claims 6 to 12, comprising, prior to attachment of the attachment portion (910A, 910B) of the tool holder (900) on the support means (612,613) , the steps of: - acquiring the reference frame of the tool holder (900) on acquisition means (5) able to measure the optical characteristics of an ophthalmic lens (L1), transferring the tool holder (900) from the acquisition means (5) on the trimming and drilling device (6) opposite the support means (612, 613), with transfer means (2.7) capable of transferring an ophthalmic lens (L1) from the d acquisition (5) on the trimming and drilling device (6) facing the support means (612, 613), transferring and fixing the fixing part (910A, 910B) of the tool holder (900) on the means support (612,613) being realized with a follow-up of the reference acquired and memorized by mechanical means or Electronic.   14. A method of loading and / or unloading according to the preceding claim, wherein the measurement of the locating characteristics of the tool holder (900) is an optical or mechanical measurement.