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WO2004110700A1 - Procede et dispositif d'usinage de verres de lunettes, et verre de lunettes ainsi obtenu - Google Patents

Procede et dispositif d'usinage de verres de lunettes, et verre de lunettes ainsi obtenu Download PDF

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Publication number
WO2004110700A1
WO2004110700A1 PCT/EP2004/006396 EP2004006396W WO2004110700A1 WO 2004110700 A1 WO2004110700 A1 WO 2004110700A1 EP 2004006396 W EP2004006396 W EP 2004006396W WO 2004110700 A1 WO2004110700 A1 WO 2004110700A1
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WO
WIPO (PCT)
Prior art keywords
raw glass
raw
glass
data
measured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2004/006396
Other languages
German (de)
English (en)
Inventor
Michael Engelbert Grafberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of WO2004110700A1 publication Critical patent/WO2004110700A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
    • B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms

Definitions

  • the invention relates to a method for the automated processing of spectacle lenses, in which a raw lens is processed in a machining center according to predetermined first data of the raw lens and second data of an associated spectacle frame.
  • the invention further relates to a device for the automated processing of spectacle lenses, with a processing center in which a raw lens is processed according to predetermined first data of the raw lens and second data of an associated spectacle frame.
  • the invention relates to a spectacle lens.
  • a method and a device of the type mentioned above are known from DE 197 49 428 AI.
  • eyeglasses in which the frame of the eyeglass frame completely or partially surrounds the eyeglass lenses and stunned eyeglasses, in which the temples and the nose bridge are screwed directly onto the eyeglass lens, so that the eyeglass lenses have a supporting function.
  • the latter are also known as drilling glasses.
  • the contour of the spectacle lens is essentially determined by the shape of the frame of the spectacle frame that the spectacle wearer has chosen.
  • the optician must therefore take into account the spatial data of the course of the frame groove of the spectacle frame in addition to the person-specific data, namely the optical data of the spectacle lens and the data of the head shape and the pupil distance of the spectacle wearer.
  • the contour can be freely selected within certain limits, regardless of the glasses frame.
  • the optician must therefore determine the contour together with the spectacle wearer.
  • sample frames are used during the fitting, which instead of optical glasses only contain so-called support lenses that are optically neutral.
  • attachment Maintenance holes get a certain position and orientation to the surface of the lens and the frame components.
  • the alignment of the lenses in the horizontal, vertical, to the shape of the head and to the distances and heights of the penetration points in their position with respect to the pupil centers must be taken into account when adapting the lenses to a specific person. Due to the development of increasingly thinner glasses that can combine different optical effects, the surface geometries are complex and asymmetrical.
  • the ophthalmologist or optician uses appropriate measurement methods to determine the optical effects necessary for a person and their position.
  • the raw glasses are manufactured on the basis of this data by industrial manufacturers and then adjusted by the optician to the glasses frame as well as to the head shape and the pupil distance of the glasses wearer. Due to the large number of person-specific circumstances on the one hand and industrial optics concepts and glass types on the other hand, an unmanageable variety of conceivable raw glasses is created, which in today's circumstances is theoretically in the order of 10 9 .
  • a processing device for the 3D processing of optical glass blanks is known from DE 197 49 428 A1 mentioned at the outset.
  • the known device is based on a concept in which opticians transmit the optical data of the spectacle wearer to a grinding-in center which produces the desired spectacle lenses from unprocessed glass blanks via 3D CNC machining.
  • this involves a 3D production of the so-called facet, i.e. the rim of the spectacle lens, which is to be spatially adapted as exactly as possible to the course of the frame groove of the spectacle frame in order to avoid mechanical tension in the spectacle lens.
  • facet i.e. the rim of the spectacle lens
  • the known device requires a complete transmission of all necessary data to the grinding center, including the surface data of the spectacle lens.
  • a disadvantage of the known device is that the industrial spectacle lens manufacturers have to publish their complete data on the spectacle lens geometries. Furthermore, because of the extreme amount of data from the many different spectacle lenses, the known procedure appears to be less practical, also from the point of view of the need to update the data stocks. Furthermore, the Not known device that the different glass geometries require different recordings for the raw glasses, and that with the change in position of the optical penetration points in most cases, a change in the orientation of the machining vector and the center of gravity of the contour is necessary or takes place. This applies in particular in the case of industrial processing of a large number of spectacle lenses, in which different raw glasses are always to be processed one after the other.
  • DE 198 04 428 AI discloses a method and a device for marking or drilling holes in spectacle lenses.
  • the position of the holes is touchless or groping e.g. captured on a support disc.
  • the recorded data are converted into CNC data of a processing tool.
  • JP 08-155954 describes a drilling machine for frameless spectacle lenses, in which the angle of inclination of the glass surface is measured and the angle of inclination of the drill can be adjusted, but this only allows the drill to be positioned perpendicular to the glass surface. However, this gives the hole a direction that only depends on the inclination of the Glass surface is determined and can therefore be different than is desired for reasons of customization.
  • the invention has for its object to develop a method and an apparatus of the type mentioned in such a way that the disadvantages explained above are avoided.
  • an improved adaptation of the spectacle lenses, in particular of stunned spectacle lenses, should be possible under industrial production conditions.
  • this object is achieved according to the invention in that the first data are measured at least in part in the processing center on the raw glass.
  • the object is achieved in that the processing center has means for at least partially capturing the first data on the raw glass.
  • the object on which the invention is based is also achieved by an eyeglass lens produced according to the method according to the invention.
  • the invention allows industrial processing to be carried out without externally supplying data to the glass surface, because the data required for the processing are recorded in the processing center itself. This makes it possible lent to process any number of different glasses one after the other or in any order. It is not necessary to save and update large amounts of data and the lens manufacturers do not have to hand over their data. This applies to all possible processing methods for spectacle lenses, i.e. both optical surface processing, faceting and drilling.
  • the shape of at least one surface of the raw glass is measured, preferably by means of a probe.
  • This measure has the advantage that the shape of the raw glass can be determined in a simple manner using known means.
  • contactless methods can also be used here.
  • the optical effect of the raw glass is measured, in particular the position of the optical center of the raw glass or the position of the optical axis of the raw glass is determined.
  • the position of points is measured which were previously attached to the raw glass by means of an apex refractive index.
  • This measure has the advantage that the usual markings made by an optician, for example, can be evaluated immediately. The same applies if, in the case of industrially prefabricated progressive lenses, the position of the sign marks is measured, which were previously applied to the raw lens designed as a progressive lens.
  • optical effect is measured by means of a photometric measurement unit, alternatively a fully automatic, unattended centering system with an integrated lensmeter can be used.
  • a particularly good effect is achieved if vectors for recording the raw glass are determined from the measured data.
  • This measure has the advantage that the individual, person-specific conditions are optimally taken into account when processing the raw glass in the processing center.
  • vectors are determined from the measured data for storing or measuring or processing the raw glass.
  • the advantage of this measure is that an established method is used that is widely recognized.
  • the processing comprises drilling holes on the raw glass. This is a preferred area of application of the invention, without being restricted thereto.
  • the machining comprises attaching a flattened area around the boreholes.
  • This measure has the advantage that the drill engages on a flat area of the raw glass surface, so that more precise bores are possible in which there is a much smaller risk of the drill running out.
  • the processing can also include attaching a facet to the circumference of the raw glass or processing a surface of the raw glass.
  • the position of drill holes and / or the contour of the finished processed lens is preferably determined using the box method according to RAL RG914.
  • the data representing the contour can be modified and, if the contour is modified, the position of the boreholes is automatically adapted. Furthermore, according to one embodiment of the method according to the invention, the alignment of the boreholes will be made such that the center of the curvature of the raw glass is directed towards the axis of rotation of the eye.
  • an embodiment of the method according to the invention is preferred in which the raw glass is automatically inserted and fixed in an associated spectacle frame after the processing has ended.
  • This measure has the advantage that the entire manufacturing process of the glasses can be automated.
  • a further embodiment of the method according to the invention is characterized in that the spectacle frame provided for a pair of processed raw glasses, including support disks inserted therein, with person-specific markings thereon, is measured and data relating to the alignment of the spectacle frame with the head of the person is determined from the measurement results become.
  • the spectacle frame with the support disks is measured photometrically.
  • This measure has the advantage that the data determined by the optician for the assignment of the spectacle frame to the head shape of the spectacle wearer in the original, namely on the basis of the support lenses marked by the optician, can be taken into account, both for the processing of the raw lenses and for the assembly of the Eyeglass lenses in the eyeglass frame.
  • the optician therefore does not have to use the data determined by him transferred separately and a subsequent adjustment of the glasses frame to the head of the glasses wearer is no longer necessary,
  • the means have a first arrangement for measuring a surface of the raw glass, preferably a probe.
  • the means have a second arrangement for measuring the optical effect of the raw glass, in particular a photometric measurement unit or a fully automatic, unattended centering system with an integrated lensmeter.
  • An embodiment of the invention with a first arrangement for measuring a surface of the raw glass and a second arrangement for measuring the optical effect of the raw glass is characterized in that the machining center has a measuring carriage for moving the raw glass between the first and the second arrangement.
  • This measure has the advantage that the measurements of the shape and the optical effect of the raw glass take place in a single clamping.
  • the measuring slide is provided with three-point supports for the raw glass.
  • the machining center preferably has at least one milling and drilling station.
  • This measure has the advantage that all of the planned processing steps can take place in the same center and also in a single clamping.
  • the drilling and milling station preferably comprises a plurality of tools in a multi-spindle arrangement.
  • This measure has the advantage that a tool change is not necessary.
  • the multiple tools are advantageously arranged on at least one terrace-like multi-headstock.
  • This measure has the advantage that all processing tools are optimally accessible.
  • the processing center has a portal and at least two tables for measuring arrangements or processing stations that can be moved relative to the portal.
  • guides for travel units for measuring or handling the raw glass are preferably provided on the portal. This measure has the advantage that two highly stable travel axes are created.
  • the machining center has a multi-axis robot for handling the raw glass.
  • This measure has the advantage that the raw glass can be handled in the room with the necessary degrees of freedom.
  • the multi-axis robot preferably has a three-point glass holder for the raw glass to be handled.
  • This measure has the advantage that here too there is a defined support in a predetermined level.
  • the vector formed by the three-point glass holder can be set as a function of the first data.
  • the multi-axis robot preferably holds the raw glass on both sides.
  • the multi-axis robot can advantageously be moved along a large number of degrees of freedom or axes.
  • it can have an axis of rotation for the defined rotation of the raw glass and allows, for example, a relative movement to the raw glass in at least five axes, preferably in six axes.
  • the machining center also has a magazine for raw glass to be machined.
  • the magazine is preferably also provided with three-point supports for the raw glasses.
  • the three-point supports of the magazine and the measuring slide preferably correspond geometrically.
  • an embodiment of the device according to the invention is preferred in which means for mounting the finished raw glass are provided in an associated spectacle frame.
  • Figure 1 is an overall perspective view of an embodiment of a device according to the invention
  • FIG. 2 shows a plan view of the device according to FIG. 1, partially broken off
  • FIG. 3 shows a perspective view of a multi-axis robot used in the device according to FIGS. 1 and 2;
  • FIG. 4 shows a section marked IV in FIG. 3 on an enlarged scale
  • FIG. 5 shows a partial top view of a magazine as used in the device according to FIGS. 1 and 2;
  • FIG. 6 shows a section marked VI in FIG. 5 on an enlarged scale
  • FIG. 7 shows a section marked VII in FIG. 5 on an enlarged scale
  • FIG. 8 shows a plan view of a raw glass for drilling glasses
  • FIG. 9 shows a detail from FIG. 8, illustrating a standardized frame
  • FIG. 10 shows a representation similar to FIG. 8 to explain a representation of a spectacle lens contour in polar coordinates
  • FIG. 11 shows a perspective view of a raw glass held by a three-point holder of the multi-axis robot from FIGS. 3 and 4.
  • FIGS. 1 and 2 designates as a whole a machining center for CNC-controlled machining of spectacle lenses, which is controlled by a control unit 11.
  • “Machining” is primarily to be understood to mean machining the outer edge of the spectacle lens and, in the case of so-called drilling spectacle lenses, the attachment of the fastening holes for the web and the temple of the spectacles on the spectacle lens, but this does not exclude further machining steps.
  • the machining center 10 is preferred the last link in a chain of stations in which individual glasses are produced for a person, starting with the recording of the person-specific data, the manufacture of the raw glass to the processing of the raw glass and its fitting into the glasses frame selected by the person 10 can be installed at an optician or in a so-called grinding center, which ensures the fitting of the raw lenses supplied by the eyeglass manufacturer into the respective eyeglass frame for several opticians.
  • the machining center 10 has a portal 12.
  • a first table 14, which can be moved on rails 16, extends through the portal 12 on the right-hand side in FIGS. 1 and 2.
  • the rails 16 extend in the Y direction.
  • a magazine 20 in which raw glasses 22, for example thirty-six raw glasses 22, are kept ready. These raw glasses 22 are generally all different from one another, because they were manufactured according to person-specific data. They are each arranged in pairs in compartments 23. Details of the magazine 20 will be explained further below with reference to FIGS. 5 to 7.
  • the magazine 20 can be designed as an exchangeable unit in order to enable an automated change of the complete magazine 20.
  • a measuring slide 26 On a front part of the first table 14 there is a measuring slide 26 on the upper side 24 thereof, which extends in the X direction. Glasses 22 can be placed on the measuring slide 26 and moved in the X direction. In doing so, they arrive in the working area of a photometric measurement unit 28, in which, e.g., from the optical effect of the respective raw glass 22, whose optical center can be determined.
  • a photometric measurement unit 28 instead of the photometric measurement unit 22, a fully automatic, user-free centering system with an integrated apex refractive index can also be used.
  • a second table 30 also extends through the portal 12 next to the first table 14.
  • the second table 30 runs on rails 32, which likewise extend in the Y direction.
  • a drilling and milling station 36 is located on an upper side 34 of the second table 30.
  • the drilling and milling station 36 is provided with a plurality of drills 38 and milling cutters. These are arranged in one or more terrace-like multi-spindle blocks 40, so that each of the drills 38 and milling cutters driven in the multi-spindle blocks 40 is openly accessible.
  • a processing station for example a grinding station 42, which is only indicated schematically.
  • Rails 44 extending in the X direction are attached to the top of the portal 12.
  • the previously mentioned measuring probe 29 and a multi-axis robot 46 for handling the raw glasses 22 run on these rails.
  • Two or more multi-axis robots can also be provided in order to carry out several of the operations described below simultaneously by several such robots.
  • FIG. 2a in FIG. 2 also indicates that the portal 12 can also have an extended design.
  • a third table 48 on which, for example, glasses can also be fitted.
  • the corresponding spectacle lenses are fed to the third table 48, as indicated by an arrow 49.
  • Suitable handling means are located on the third table 48, which, together with the multi-axis robot 46, inserts the finished glasses into their associated frame and there fixed. The fully assembled glasses are then removed and made ready for dispatch.
  • FIGS. 3 and 4 show further details of the multi-axis robot 46.
  • the multi-axis robot 46 has a fork head 50 at its upper end, which e.g. is provided with three axes of rotation 52, 54 and 56. At the lower end of the fork head 50 there is a spindle 58 which enables a spacer 60 to be rotated about the axis of rotation 54.
  • a holding arm 62 running parallel to the spacer body 60 is provided, which can be moved in the longitudinal direction, as indicated by an arrow 64.
  • the holding arm 62 carries at its lower end a cross arm 66 which can be rotated about a longitudinal axis 68 of the holding arm.
  • the cross arm 66 carries at its free end a rotatable and mounted in a ball joint retaining ring 70.
  • the lower end of the spacer 60 has an elastic sealing ring 72 and a three-point glass receptacle 74, the details of which will be described below.
  • the raw glass 22 can be held with a predetermined holding force between the rotatable holding ring 70 and the three-point glass receptacle 74 with the elastic sealing ring 72 and can thereby be rotated by means of the spindle 58.
  • the holding force can be monitored with the aid of a sensor (not shown).
  • the rotation of the raw glass 22 by the spindle 58 can be adjusted with an angle by means of a further sensor (likewise not shown).
  • the three-point glass holder can thus be moved in six axes, namely linearly along the X, Y and Z axes and rotationally about the axes 52, 54 and 56.
  • the spacer body 60 has, inter alia, the function of holding the raw glass in such a way that open access to it is possible for the processing tools of the stations 36 and 42.
  • a conical region 76 of the spacer body 60 is preferably provided with nozzles 78 for supplying a coolant, for example a liquid or a gas, during the machining.
  • FIGS. 5 to 7 show further details of the magazine 20.
  • the compartments 23 for pairs of raw glasses 22 can again be seen.
  • Each holder 82 is provided with a hole pattern 86, in the holes of which a holding pin 88 can be inserted.
  • the three holding pins 88 of a receptacle hold a raw glass 22 on its circumference, as can be clearly seen from FIG. 7.
  • a glass support is designated, which can be inserted into a compartment 20. With the aid of the glass carrier 90, the receptacles can be pre-equipped with raw glasses 22 outside the magazine 20.
  • a raw glass 22 is shown enlarged in FIG.
  • the raw glass 22 has a focal point 92.
  • the person-specific circumstances are also entered in FIG. 8, namely a face center 94, a pupil distance 96, half a web width 98 and the height of the optical penetration point 100.
  • three points are with 102a, 102b and 102c.
  • the manufacturer applies markings (not shown).
  • the box model of the RAL RG915 is usually used for centering and adjusting glasses.
  • a corresponding box is labeled 104 in FIG.
  • the position of the frame 104 is determined by the position of the center 92 and an angle 106.
  • the contour 108 of the finished spectacle lens lies within the frame 104 after the raw glass 22 has been processed.
  • FIG. 9 shows in further details that boreholes 110a and 110b are also defined by the frame 104, which holes serve to fasten the web and the brackets directly to the spectacle lens in so-called drilling glasses.
  • Drill holes are to be understood to mean all of the fastening positions customary in drilling glasses, including grooves and elongated holes.
  • the position of the drilled holes 110a and 110b is given by corresponding coordinates, for example with a polar radius 112 and a polar angle 114 for the drilled hole 110b.
  • FIG. 10 shows that the contour 108 can be represented point by point by polar coordinates. 120 denotes a polar beam and 122 the associated contour point.
  • FIG. 11 shows how the three-point glass receptacle 74 acts on the raw glass 22.
  • the three-point glass receptacle 74 is formed by three locating pins 116a, 116b and 116c, which are located within the elastic sealing ring 72.
  • the associated contact points 118a, 118b and 118c for the locating bolts 116a, 116b and 116c are shown in FIG. 10 relative to the frame 104.
  • the control unit 11 can operate the CNC control of the controlled elements either in the XYZ coordinate system of the portal 12 or relative to the alignment of the probe tip of the measuring probe 29 or the three-point glass holder 74.
  • the coordinate transformations required for this purpose with Cartesian or polar coordinates are known to the person skilled in the art Algorithms performed.
  • the individual work steps are positioned by shifting the zero point in the running CNC program to the respective starting points for recording, storing, measuring and processing the raw glass 22.
  • the CNC control programs are generated in a database-based, parametric and hierarchically structured manner.
  • the machining center 10 works as follows:
  • the first table 14 moves so far in the Y direction that the raw glass 22 to be processed first comes to lie below the X trajectory of the multi-axis robot 46.
  • the multi-axis robot 46 grips the raw glass 22 by moving the three-point glass receptacle 74 along its e.g. moves six axes until the locating pins 116a, 116b, 116c lie approximately in a circle around the center 84 on the upper surface of the raw glass 22.
  • a vacuum is now generated within the elastic sealing ring 72 and the raw glass 22 is thus sucked in and held on the three-point glass receptacle 74.
  • the multi-axis robot 46 now transfers the raw glass 22 by moving along the X and Z axes while simultaneously moving the first table 14 along the Y axis into a receptacle of the measuring slide 26. There, the raw glass 22 is placed on the same points as it had previously been in the recordings 82 of the magazine 20.
  • the measuring slide 26 first brings the raw glass into the working area of the measuring probe 29.
  • the measuring probe 29 scans the surface of the raw glass 22 and the corresponding data are stored in the control unit 11.
  • the probe can be provided with a multi-axis fork head, which is constructed similarly to the fork head 50.
  • you can of course use one non-contact measuring system can be used, as is generally known.
  • the raw glass After measuring its surface, the raw glass is transferred to the working area of the photometric measuring unit 28 by moving the measuring slide 26, that is to say in the same clamping. There, the optical effect of the raw glass 22 is measured and its optical center is determined. If the raw glass is provided with the points 102a, 102b and 102c, their position is determined. The same applies to progressive lenses that are provided with a sign by the lens manufacturer. All data determined in the process are transmitted to the control unit 11. In particular, this includes the position of the optical center in X-Y coordinates and the angle 106 for the position of the axis.
  • the measuring processes on the probe 29 and on the photometric measuring unit 28 can also take place in the reverse order.
  • the control unit 11 determines the movement sequence of the multi-axis robot 46 from all these data.
  • a spectacle frame which completely or partially surrounds the spectacle lenses, so that the raw glasses 22 must be provided with a completely or partially circumferential facet
  • the 3D data of the frame groove of the individually selected glasses frame entered.
  • the "box method" according to RAL RG 15 is used, in which the contour 108 and the position of the boreholes 110a and 110b are determined.
  • the frame 104 is rotated through the angle 106 and in accordance with the data determined by the optician Pupil distance 96, half web width 98 and the height of the optical piercing point 100.
  • the contour 108 and the position of the boreholes 110a and 110b are calculated.
  • the control device determines at which contact points 118a, 118b and 118c and under which vector the fulcrum glass receptacle 74 should contact the raw glass 22.
  • the holding arm 62 is rotated 90 ° away from the measuring slide 26 and extended a little in the direction of the arrow 64.
  • the control device 11 now leads the locating pins 116a, 116b and 116c of the three-point glass receptacle 74 to the contact points 118a, 118b and 118c in accordance with the previously determined values.
  • the raw glass 22 is gripped and raised by applying a negative pressure.
  • the holding arm 62 pivots back again and is drawn in in the direction of the arrow 64, so that the raw glass 22 is now fixed at the contact points 118a, 118b, 118c with sensor-controlled force.
  • the retaining ring 70 adjusts to the curvature of the raw glass 22 as a result of its mounting in the ball joint.
  • the raw glass can now be steplessly aligned at any angle under the control of an angle sensor by correspondingly controlling the spindle 58 (sixth axis).
  • the glass blank 22 is now fed in this defined orientation by moving the multi-axis robot 46 to the processing stations 36 and / or 42 on the second table 30.
  • the sequence and type of processing steps are individually determined, depending on whether surface processing and / or edge processing and / or drilling processing of the raw glass 22 is provided. Since all the necessary tools are present and ready for operation in the multi-spindle stocks 40 at the same time, tool change times are eliminated. Since the holding arm 60 is provided with the conical region 76, the tools can also engage on the rear surface of the raw glass 22 which faces the spindle 58. This enables machining on both sides, or when attaching a facet to the edge of the raw glass 22, the processing tool can be pivoted far around the edge of the raw glass, so that the facet can follow almost any shape of the frame groove of spectacle frames.
  • the three-point glass receptacle 74 is positioned at a defined distance from the center of a processing tool, for example a grinding wheel, contained in the processing station, for example the grinding station 42.
  • the contour is then machined by the controlled rotation of the spindle 58 with simultaneous defined infeed along the axis which runs between the center of the machining tool and the glass receiving center. Necessary angle settings for the position of the contour depending on the orientation of the raw glass in the eyeglass frame can be delivered simultaneously.
  • the flattened area 115 is first produced by using cutters and then the drilled holes 110a and 110b are made in this area 115.
  • the zero point shift takes place at a defined distance along the selected drill vector at the drilling and milling station 36.
  • the fork head 50 is rotated in accordance with the orientation of the machining vector and the spindle 58 pivoted.
  • the CNC control of the control unit 11 sets the 2D contours of the machining points, such as grooves, elongated holes and bores, using the function of the so-called robot transformation used in cardanic five-axis units and in robot arms, while offsetting the supplied angles for the alignment of the Machining vector to the tool vector and the distance through the polar radius 112 um.
  • the multi-axis robot 46 can insert it directly into the associated spectacle frame and fix it there. Alternatively, it can also be temporarily stored until the associated other raw lens of the pair of spectacle lenses is also finished. All this takes place in the area of the third table 48.
  • the associated spectacle frame is also delivered there (arrow 49).
  • the eyeglass frames can namely be provided together with those support lenses that were used and marked by the optician when adapting the sample frame to the eyeglass wearer. Then, for example, those data relating to the head shape of the spectacle wearer can be determined in the photometric measurement unit 28, for example the height of the support points of the temples on the ears, the inclination of the spectacle lenses, etc. With this additional data, the raw lenses 22 can be taken into account Process information without the need for a corresponding data transfer from the optician to the processing center. With this data, the machining center can then mount the glasses in the glasses frame without further adjustment by the optician.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Eyeglasses (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'usinage automatisé de verres de lunettes. Un verre brut (22) est usiné dans un centre d'usinage (10), d'après des premières données, prédéterminées, du verre brut (22) et des secondes données d'une monture de lunettes correspondante. Les premières données sont mesurées, au moins partiellement, dans le centre d'usinage (10), sur le verre brut (22). Le centre d'usinage (10) présente des moyens (28, 29) destinés à détecter, au moins partiellement, les premières données sur le verre brut (22) (figure 1).
PCT/EP2004/006396 2003-06-12 2004-06-14 Procede et dispositif d'usinage de verres de lunettes, et verre de lunettes ainsi obtenu Ceased WO2004110700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10326956.8 2003-06-12
DE2003126956 DE10326956A1 (de) 2003-06-12 2003-06-12 Vorrichtung und Verfahren zur automatisierten Bearbeitung von Brillengläsern für die Verwendung in s.g. Bohrbrillen oder randlosen Brillengestellen

Publications (1)

Publication Number Publication Date
WO2004110700A1 true WO2004110700A1 (fr) 2004-12-23

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PCT/EP2004/006396 Ceased WO2004110700A1 (fr) 2003-06-12 2004-06-14 Procede et dispositif d'usinage de verres de lunettes, et verre de lunettes ainsi obtenu

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DE (1) DE10326956A1 (fr)
WO (1) WO2004110700A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2878971A1 (fr) * 2004-12-03 2006-06-09 Essilor Int Procede et dispositif de preparation automatique au montage d'une lentille ophtalmique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881036A2 (fr) * 1997-05-26 1998-12-02 Kabushiki Kaisha TOPCON Dispositif pour mesurer le contour d'une lentille
DE19749428A1 (de) * 1997-11-08 1999-05-12 Schapoehler Kg I G Bearbeitungsvorrichtung für die 3D-Bearbeitung von optischen Glasrohlingen
EP0990484A1 (fr) * 1998-09-29 2000-04-05 Nidek Co., Ltd. Dispositif d'usinage pour lentilles
US20020176756A1 (en) * 2001-04-20 2002-11-28 Loh Optikmaschinen Ag Process for edge-machining of optical lenses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881036A2 (fr) * 1997-05-26 1998-12-02 Kabushiki Kaisha TOPCON Dispositif pour mesurer le contour d'une lentille
DE19749428A1 (de) * 1997-11-08 1999-05-12 Schapoehler Kg I G Bearbeitungsvorrichtung für die 3D-Bearbeitung von optischen Glasrohlingen
EP0990484A1 (fr) * 1998-09-29 2000-04-05 Nidek Co., Ltd. Dispositif d'usinage pour lentilles
US20020176756A1 (en) * 2001-04-20 2002-11-28 Loh Optikmaschinen Ag Process for edge-machining of optical lenses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2878971A1 (fr) * 2004-12-03 2006-06-09 Essilor Int Procede et dispositif de preparation automatique au montage d'une lentille ophtalmique
US7661819B2 (en) 2004-12-03 2010-02-16 Essilor International (Compagnie Generale D'optique) Method and a device for automatically preparing an ophthalmic lens for mounting

Also Published As

Publication number Publication date
DE10326956A1 (de) 2004-12-30

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