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EP1864753B1 - Machine d'usinage de pièces optiques, en particulier de lentilles de lunettes en plastique - Google Patents

Machine d'usinage de pièces optiques, en particulier de lentilles de lunettes en plastique Download PDF

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Publication number
EP1864753B1
EP1864753B1 EP07009742.3A EP07009742A EP1864753B1 EP 1864753 B1 EP1864753 B1 EP 1864753B1 EP 07009742 A EP07009742 A EP 07009742A EP 1864753 B1 EP1864753 B1 EP 1864753B1
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EP
European Patent Office
Prior art keywords
workpiece
fast
tool
plane
axis
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.)
Not-in-force
Application number
EP07009742.3A
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German (de)
English (en)
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EP1864753A1 (fr
Inventor
Urs Dr. Meyer
Marc Savoie
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.)
Satisloh AG
Original Assignee
Satisloh AG
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Filing date
Publication date
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Publication of EP1864753A1 publication Critical patent/EP1864753A1/fr
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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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/04—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses involving grinding wheels controlled by gearing
    • B24B13/046—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses involving grinding wheels controlled by gearing using a pointed tool or scraper-like tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
    • B44B3/04—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings wherein non-plane surfaces are worked
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S82/00—Turning
    • Y10S82/904—Vibrating method or tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5104—Type of machine
    • Y10T29/5109—Lathe
    • Y10T29/5114—Lathe and tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2524—Multiple
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2531—Carriage feed

Definitions

  • the present invention relates to a machine for processing optical workpieces, in particular plastic spectacle lenses, according to the preamble of patent claim 1.
  • plastic injection-molded spectacle lens blank also called a blank
  • a plastic injection-molded spectacle lens blank which has a standardized finished convex outer surface with e.g. spherical, aspherical or progressive form.
  • the generally concave inner or prescription surfaces receive a spherical, aspherical, toric, atoric, progressive or freeform geometry (progressive surfaces) by means of machining, depending on the desired optical effect.
  • the typical conventional process of internal surface working after blocking the lens blank with its outer surface on a block piece, provides a milling or turning process for producing the optically active mold, usually followed by a finish grinding or polishing process to achieve the necessary surface finish a turned-eyeglass lens but also can be dispensable.
  • fast-tool lathes are used in the prior art, in which a turning tool either linear reciprocating (see, eg, the WO-A-02/06005 or the generic WO 97/13603 ) or rotary (see, for example, the WO-A-99/33611 ) can be moved highly dynamically, so that non-rotationally symmetric lens surfaces can be produced in the turning process with very good surface qualities.
  • a progressive lens according to DIN EN ISO 8980-2 be permanently marked with at least the following information: a) marking for alignment; this must consist of at least two marks at a distance of 34 mm and be arranged symmetrically to a vertical plane through the fitting point or the prism reference point; b) indication of the additional effect, in diopters; and c) an indication of the manufacturer or supplier or the trade name or trade mark.
  • marking for alignment this standard also recommends further markings for alignment, for the distance reference point, for the near reference point, for the fitting point and for the prism reference point.
  • the permanent markings are usually made by permanent engravings, of which the functional engravings, i. the engravings required by the optician for the alignment and assignment of the respective spectacle lens are usually performed so finely that they are not visible under normal light with the naked eye
  • the non-permanent markings are e.g. executed by means of a temporary stamp image, which is removed in the course of finishing the lens.
  • some eyeglass lens manufacturers also offer permanent individual engravings on the spectacle lens, eg the engraving of the initials of the spectacle lens wearer, which is intended to emphasize the customization of the spectacle lenses and at one point of the lens is placed where it does not affect the vision.
  • the permanent engravings are usually applied in an engraving machine separate from the actual processing machine, in which a rotationally driven engraving tool with geometrically determined cutting edge (milling tool) or geometrically indefinite cutting edge (grinding tool) is guided in defined machining engagement over the spectacle lens surface to be marked to form the engraving.
  • a rotationally driven engraving tool with geometrically determined cutting edge (milling tool) or geometrically indefinite cutting edge (grinding tool) is guided in defined machining engagement over the spectacle lens surface to be marked to form the engraving.
  • engraving machines are also known in which the engraving is applied to the spectacle lens by means of a laser beam.
  • the invention is based on the object, a machine for processing optical workpieces, in particular of plastic spectacle lenses be provided with a fast-tool arrangement, by means of which also any finely detailed markings can be attached to the workpiece, without requiring the workpiece to be re-clamped or.
  • a machine for processing optical workpieces in particular of plastic spectacle lenses, which has a workpiece spindle, by means of which the workpiece is rotatably drivable about a workpiece axis of rotation, and a first fast tool arrangement, by means of a turning tool in the direction the workpiece spindle and the fast tool assembly are also movable in a direction transverse to the workpiece axis of rotation relative to each other, in addition to and preferably in parallel with the first fast tool assembly, a second fast tool -Anowski provided with a Engraving stylus, which has a tapered toward its workpiece towards the end tip, so that its end facing the workpiece is substantially punctiform, the engraving stylus by means of the second Fast tool assembly highly dynamic in the direction of the workpiece and away from it, so that by needles Engagement of Engierstichels with the workpiece at this a mark can be generated.
  • next to the first fast tool assembly arranged in parallel second Fast tool arrangement that drives the engraving stylus thus can be provided in the working space of one and the same machine immediately after the actual turning the workpiece with a permanent engraving Without this, the workpiece must be reloaded on a separate engraving machine, which is conducive to a fast and accurate machining process.
  • a different tool from the turning tool is used, namely the engraving stylus whose end facing the workpiece is substantially punctiform, unlike the generic state of the art, the producible geometry of the mark is not limited by the geometry of the turning tool.
  • an engraving in which the engraving stylus like a woodpecker on a tree in rapid succession impinges on the workpiece, can produce very finely detailed engravings.
  • the engraving of the workpiece does not result in wear on the turning tool, as well as the turning of the workpiece causes no wear on the engraving stylus, which increases the tool life compared to the generic state of the art. This is especially important in view of the fact that a blunt engraving stylus may only push away the material of the workpiece during engraving, but then the material will gradually return, which causes undesirable "aging” or “fading", especially in the case of the plastic material CR39 "of the engraving picture can lead.
  • the fast tool movement plane may be inclined with respect to the plane containing the workpiece axis of rotation by an angle.
  • the workpiece axis of rotation of the workpiece spindle Due to the inclination of the plane of movement of the fast tool such that between this plane of movement and the workpiece axis of rotation containing plane, thus the workpiece axis of rotation of the workpiece spindle an angle of predetermined size is present in connection with the (anyway) on the Machine existing Zustell (relative) movement the workpiece spindle in the plane containing the workpiece rotation axis, more precisely in the direction of the workpiece spindle achieve a highly accurate height adjustment of the workpiece-facing, substantially punctiform end of the engraving stylus on the workpiece axis of rotation of the workpiece spindle, without causing height displacements of Engierstichels with respect to the Fast tool Arrangement and corresponding mechanical adjusting systems for adjusting the height of the engraving stylus are required.
  • the degree of Zustell (relative) movement of the workpiece spindle in the direction of its axis and thus the height compensation achieved thereby between the workpiece axis of rotation of the workpiece spindle and the operating point of Engierstichels takes place in accordance with the sine function of the predetermined angle. All this is to achieve a high positional accuracy of the marking on the workpiece by simple means conducive; for example, a freeform surface engraving is the primary mark of the surface and must therefore be mounted with high accuracy, the allowable tolerance is about +/- 0.2 mm.
  • the fast tool movement plane and the plane containing the workpiece rotation axis include an angle of attack which is between 2 ° and 10 ° ,
  • the basic idea of the present invention namely the parallel arrangement of a second Fast-tool arrangement carrying an engraving stylus to the first fast tool arrangement for the turning tool, also on a machine with a rotary Fast-Tool arrangement for the turning tool, as they say from the WO-A-99/33611 is known to be realized, in which case a second rotary fast tool arrangement would be used for the engraving stylus.
  • the common fast tool motion plane would be perpendicular to the pivot axes of the rotary fast tool assemblies.
  • the tip of the engraving stylus is made of hard metal.
  • Fig. 1 to 5 show a schematic representation of a CNC-controlled machine 10 in particular for surface treatment of lenses L made of plastic in a rectangular Cartesian coordinate system in which the small letters x, y and z the width direction (x), the length direction (y) and the height direction (z) of the machine 10.
  • the machine 10 has a machine frame 12 which limits a processing area 14.
  • a processing area 14 On the in Fig. 1 left side of the processing area 14, two guide rails 16 extending in the (horizontal) width direction x parallel to each other, on an in Fig. 1 attached to the upper mounting surface 17 of the machine frame 12.
  • a Y-carriage 22 is slidably mounted on the guide rails 20, which is CNC-controlled by associated CNC drive and control elements (also not shown) in both directions of a Y-axis.
  • a workpiece spindle 24 is fixed, which is rotationally driven by means of an electric motor 26 in the rotational speed and the rotation angle CNC-controlled about a workpiece axis of rotation B.
  • the workpiece rotation axis B is aligned with the Y axis.
  • the spectacle lens L blocked on a block piece is mounted in a manner known per se for machining in particular the prescription surface R of the spectacle lens L in such a way that it can rotate coaxially with the workpiece spindle 24.
  • the workpiece spindle 24 by means of the X-stage assembly (X-slide 18, Y-slide 22) is CNC-position-controlled in an XY plane movable, which contains the workpiece axis of rotation B and to which the mounting surfaces 17th , 21 and 23 are parallel, while the lens L in rotational speed and rotation angle CNC-controlled about the workpiece axis of rotation B is rotatable.
  • the milling unit 28 has a milling spindle 32, which can be driven in a speed-controlled manner by means of an electric motor 30 about a milling cutter rotation axis C, at the end of which a milling tool 34 is mounted in the end projecting into the machining area 14.
  • a milling machining operation can be performed on the lens L, which - according to the teaching of EP-A-0 758 571 - Includes a plunge-cutting operation, wherein the speed-controlled about the cutter rotation axis C rotating milling tool 34 and the rotation angle controlled about the workpiece axis of rotation B rotating spectacle L are moved in at least one of the two axial directions X and Y such position controlled relative to each other that the cutting edges of the milling tool 34 at least in the region of the outer edge of the lens L produce an annular recess recess before the milling tool 34 in a shaping operation along a spiral Way by controlling the trajectory of the lens L in the X and Y axes, that is guided in the XY plane on the lens L from outside to inside to remove more material.
  • Random machining and the faceting of the spectacle lens L are optional, although preferably mit stricture operations in this milling process L.
  • edge processing can be made by means of the rotating milling tool 34 (pre) processing of the lens blank, for example, on a peripheral contour, which predetermined by the spectacle frame shape circumferential contour already largely corresponds, while in the faceting the upper or inner peripheral edge of the lens blank can be bevelled by means of the rotating milling tool 34.
  • each fast tool assembly 36, 38 an actuator 40, 42 and a respective associated shuttle 44, 46 (also called “shuttle") on.
  • the internal structure of the fast tool assemblies 36, 38 shown here is in the earlier German patent application 10 2005 052 314.5 The same applicant described in detail, which is hereby incorporated herein by reference.
  • the pendulum part 44 of the first fast tool assembly 36 is axially movable in both directions of a fast tool axis F1 by means of the actuator 40
  • the pendulum part is 46 of the second fast tool assembly 38 by means of the actuator 42 in both directions of a parallel to the first fast tool axis F1 second fast tool axis F2 axially movable.
  • the position or the stroke of the pendulum parts 44, 46 independently adjustable by means of CNC.
  • the fast tool axis F1, the fast tool axis F2, the Y axis, and the workpiece rotation axis B are in the same direction as seen in plan view. In the front view according to the Fig. 3 .
  • a turning tool 48 which preferably fixed to the shuttle 44 in a manner not shown here fixed (as opposed to adjustable) is, carries the pendulum part 46 of the second fast tool assembly 38 at its projecting into the processing area 14 end an engraving stylus described in more detail below 50, the end of the lens L facing 51 is substantially point-shaped.
  • both the turning tool 48 and the engraving stylus 50 are movable in a fast-tool moving plane (X-F1 plane and X-F2 plane, respectively).
  • a cutting plate 52 if necessary, releasably attached or as a coating forming a cutting edge 54 and the respective requirements, in particular specific for the material to be machined, polycrystalline diamond (PCD), CVD, natural diamond or even carbide with or without wear protection coating can exist.
  • PCD polycrystalline diamond
  • CVD chemical vapor deposition
  • natural diamond even carbide with or without wear protection coating
  • the pre-processed by the milling unit 28 prescription surface R of the lens L can be post-processed, which in turn regulating the movement of the lens L in the X-axis and possibly the Y-axis, ie in the XY plane, under the control of the movement of the machining turning tool 48 in the F1 axis, ie in the X-F1 plane and under control of the rotational movement of the lens L about the workpiece axis of rotation B.
  • the fast tool assemblies 36 and 38 can be controlled such that the not involved in the turning shuttle member 46 moves to the participating in the turning swinging member 44 in the opposite direction, so that the pendulum parts quasi counter-swing or in push-pull to To prevent by mass compensation that disturbing vibrations are transmitted to the machine frame 12 and to reduce these, as shown in the WO-A-02/06005 is disclosed.
  • surface qualities that are almost equivalent to the surface quality that can be achieved with conventional polishing methods can be achieved during turning.
  • the fast tool arrangements 36 and 38 are mounted on a mounting surface 56 of the machine frame 12, which with respect to the mounting surfaces 17, 21 and 23 for the XY table arrangement (X-carriage 18, Y-slide 22 ) or the workpiece spindle 24 is tilted or set at an angle ⁇ , so that the fast tool movement plane (X-F1 plane or X-F2 plane) with respect to the movement plane containing the workpiece rotation axis B (XY) Level) of the workpiece spindle 24 is tilted.
  • This angle ⁇ is in the illustrated embodiment about 5 °, but can also be slightly more or less, for example, in the range of 2 ° to 10 °.
  • an adjustment of the turning tool 48 by means of the fast tool assembly 36 in the F1 axis or a Adjustment of the engraving stylus 50 by means of the fast tool assembly 38 in the F2 axis with the result that the movement of the cutting edge 54 of the turning tool 48 and the substantially punctiform end 51 of the engraving stylus 50 receives two components of movement, namely a component of movement in the longitudinal direction
  • the latter can be used to align the operating point of the cutting edge 54 of the turning tool 48 and the end 51 of the engraving stylus 50 to the workpiece rotation axis B of the workpiece spindle 24.
  • a faulty height adjustment of the turning tool 48 is shown in the upper part of Fig. 6 .
  • a relative delivery of workpiece spindle 24 and turning tool 48 in the longitudinal direction y takes place such that the lens L at the end of the turning (left-handed turning tool 48) has a thickness in the longitudinal direction y, the desired thickness, ie the desired final thickness d s of the spectacle lens L, a surface error remains in the form of an in Fig. 6 Excessively large illustrated pin 58 on the prescription surface R.
  • This surface defect is due to the fact that the turning tool 48, more precisely its cutting edge 54 at the end of the turning operation, the workpiece rotation axis B does not "hits", but below the workpiece rotation axis B comes to a halt ( with faulty axial position y e of the workpiece spindle 24: tool 48 is too low at the end of the turning operation).
  • a comparable conical surface defect arises (not shown) when at the end of the turning process the cutting edge 54 of the turning tool 48 comes to a stop above the workpiece rotation axis B (tool too high).
  • Fig. 6 In the lower part of Fig. 6 is now a correct height adjustment of the turning tool 48 with respect to the workpiece axis of rotation B shown, in which on the prescription surface R of the lens L no central area error remains.
  • the procedure is as follows: First, - with a known position of the cutting edge 54 of the turning tool 48 in the coordinate system of the machine 10 and known angle ⁇ of the fast tool axis F1- calculated an axial position y k of the workpiece spindle 24 in the longitudinal direction y, in which the Operating point of the cutting edge 54 of the turning tool 48 at target end thickness d s of the lens to be processed L in the workpiece axis of rotation B containing XY plane comes to rest, ie the workpiece axis of rotation B "hits".
  • the workpiece spindle 24 is brought by position-controlled axial method or in the Y-axis in the calculated axial position y k , whereupon an axial setting or holding the workpiece spindle 24 in the calculated axial position y k occurs.
  • the rotationally driven spectacle lens L can be processed under position-controlled transverse feed of the workpiece spindle 24 in the X-axis and position-controlled (F1-axis) infeed of the turning tool 48 in the fast tool movement plane, ie the X-F1 plane until the target Final thickness d s on the processed spectacle lens L is achieved.
  • the cutting edge 54 of the turning tool 48 now "hits" the workpiece rotation axis B automatically.
  • the procedure may be such that the workpiece spindle 24 is not held in the Y-axis, but in addition to the movement of the fast tool assembly 36 in the F1 axis, a geometry-generating movement of the workpiece spindle 24 in the Y-axis, more precisely, the geometry generation on the Y-axis and the F1-axis is divided such that the Y-axis is responsible for the slower motion component, while the F1 axis takes over the faster motion component.
  • the advantage of this in the older German patent application 10 2005 021 640.4 The procedure described in greater detail in the Applicant's specification is, in particular, that a fast tool arrangement 36 with a smaller stroke and thus greater rigidity can be used and, in addition, higher processing speeds can be achieved.
  • the XY plane is horizontal
  • the X-F1 plane and the X-F2 plane is tilted out of the horizontal by the angle ⁇
  • the conditions can basically be taken in reverse, with a horizontal X. -F1 plane or X-F2 plane and an XY plane set at an angle relative to the horizontal plane.
  • the Fig. 7 shows the in the Fig. 2 and 5 Engraving stylus 50 shown only schematically in a scale enlarged in relation to the reality in detail.
  • the engraving stylus 50 has a cylindrical base body 60 made of steel, which is mounted on its in Fig. 7 left side is provided with a central threaded projection 62.
  • the threaded projection 62 By means of the threaded projection 62, the engraving stylus 50 can be attached to the pendulum part 46 of the second fast tool assembly 38, for which purpose the threaded projection 62 is screwed into a threaded bore (not shown) formed on the face side on the pendulum part 46 and complementary to the threaded neck 62.
  • the base body 60 is provided with a transverse bore 64 through which a tool, such as a screwdriver can be inserted, so that the engraving stylus 50, a sufficiently large torque can be applied.
  • a tool such as a screwdriver
  • the base body 60 on the outer circumference could also with a key surface be provided.
  • the main body 60 ends on the in Fig. 7 From the end face 68, an end portion 70 of the engraving stylus 50 extends away, which terminates after a cylindrical mounting portion 72 with a tapered towards the end 51 of the engraving stylus 50 point 74.
  • the end portion 70 may be integrally formed with the base body 60 and possibly hardened at the tip 74, a configuration is preferred in which the end portion 70 is made of hard metal.
  • the base body 60 starting from the end face 68, is provided with a blind bore (not shown) in which the end portion 70 is fastened as an insert coaxially to the base body 60, for example with the aid of a solder joint.
  • Such a calibration can for example be such that prior to machining of workpieces with the machine 10, a calibration piece (not shown) in the receptacle of the workpiece spindle 24 is mounted, in such a way that the calibration piece in the coordinate system of the machine 10 is a predetermined position in the x, y and z directions.
  • the calibration piece has, for example, a spherical surface with a known spherical radius.
  • the workpiece spindle 24 is moved by means of the Y-carriage 22 in a predetermined y-position and fixed there.
  • the contact position can also be determined, for example, by a momentary increase in the following error of the F2 axis, ie a momentary increase in the difference between the setpoint stroke of the pendulum part 46 and its actual stroke, which is detected by CNC technology.
  • the (relative) position of the end 51 of the engraving stylus 50 in the coordinate system of the machine 10 can be determined in the X, Y and B axes and known spherical radius of the surface of the calibrating piece be calculated in a manner known to those skilled in the art.
  • the positions in the X and B axes are given by the polar coordinates of the engraving to be applied with respect to the axis of rotation of the lens L and its horizontal, ie the workpiece spindle 24 by means of the X-carriage 18 in the X-axis corresponding to the radial distance to be attached Engraving with respect to the axis of rotation of the lens L defined linearly, while the workpiece spindle 24 is rotated about the workpiece axis of rotation B according to the angular position of the applied engraving with respect to the axis of rotation and horizontal of the lens L defined.
  • the defined adjustment of the workpiece spindle 24 in the Y-axis by means of the Y-slide 22 is carried out in accordance with the thickness of the lens L also known from the above information at the point of the recipe surface R to which the engraving is to be attached, in such a way that a position in the Y-axis is approached, in which the end 51 of the means of the second fast tool assembly 38 linearly driven engraving stylus 50 touches the prescription surface R just at the time when it on the workpiece axis of rotation B containing XY Level "meets" or is at the same level.
  • the depth of the engraving can be adjusted by a suitable (more) delivery of Engierstichels 50 in the F2 axis.
  • the engraving stylus 50 can now be moved highly dynamically in the direction of the spectacle lens L and away therefrom by means of the second fast-tool arrangement 38, with the end 51 of the engraving stylus 50 in need of needle punching, ie like a woodpecker on a tree in rapid succession impinges on the recipe surface R, while the impact point by positioning of the spectacle lens L in the X and B axes and possibly the Y axis is changed according to the engraving image to be generated.
  • the Fig. 8 finally shows an example of a engraved by means of the machine 10 described above prescription surface R of the lens L, wherein the in Fig. 8 perpendicular to each other dashed lines do not belong to the engraving, but merely serve to explain the position of a part of the engraving.
  • the recipe surface R shown is a progressive surface with the permanent engraving required in accordance with DIN EN ISO 8980-2, which initially has two circular markings 76, 78 spaced by 34 mm for orientation, for example, on the glass horizons passing through the glass center, the latter exactly in the middle between the two markings 76, 78 is located. Below the in Fig.
  • the invention relates to a machine for processing optical workpieces, in particular plastic spectacle lenses, which has a workpiece spindle, by means of which the workpiece is rotatably drivable about a workpiece axis of rotation, and a first fast tool arrangement, by means of which a lathe chisel in FIG Direction of the workpiece and is movable away therefrom, wherein the workpiece spindle and the first fast tool assembly are also movable in a direction transverse to the workpiece axis of rotation relative to each other.
  • a second fast tool arrangement is provided with an engraving stylus whose end facing the workpiece is substantially punctiform, the engraving stylus by means of the second fast tool assembly highly dynamic in the direction of the workpiece and away from it, so that by needling engagement of the engraving stylus with the workpiece at this in the same clamping a mark of any geometry can be generated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Milling Processes (AREA)

Claims (5)

  1. Machine (10) pour l'usinage de pièces d'oeuvre optiques (L), notamment des verres de lunettes en matière plastique, comprenant une broche porte-pièce (24) à l'aide de laquelle la pièce d'oeuvre (L) peut être entraînée en rotation autour d'un axe de rotation de pièce d'oeuvre (B), et un premier agencement d'outil rapide (36) au moyen duquel un outil de tournage (48) peut être déplacé en direction de la pièce d'oeuvre (L) et de manière à s'éloigner de celle-ci, la broche porte-pièce (24) et le premier agencement d'outil rapide (36) pouvant, en outre, être déplacés relativement l'un par rapport à l'autre dans une direction transversale à l'axe de rotation de pièce d'oeuvre (B),
    caractérisée en ce qu'à côté du premier agencement d'outil rapide (36), et de préférence selon un agencement parallèle à celui-ci, est prévu un deuxième agencement d'outil rapide (38) comportant un burin de gravure (50), qui présente une pointe (74) se rétrécissant de manière conique en direction de son extrémité (51) dirigée vers la pièce d'oeuvre (L), de sorte que son extrémité (51) dirigée vers la pièce d'oeuvre (L) présente sensiblement une forme de point, le burin de gravure (50) pouvant être déplacé de manière hautement dynamique au moyen du deuxième agencement d'outil rapide (38), en direction de la pièce d'oeuvre (L) et de manière à s'éloigner de celle-ci, de sorte qu'il est ainsi possible, grâce à une action de pointeau du burin de gravure (50) sur la pièce d'oeuvre (L) de produire un marquage (76, 78, 80, 82, 84) sur celle-ci.
  2. Machine selon la revendication 1, caractérisée en ce que le burin de gravure (50) peut être déplacé au moyen du deuxième agencement d'outil rapide (38), dans un plan de mouvement d'outil rapide (plan X-F2), tandis que la broche porte-pièce (24) et le deuxième agencement d'outil rapide (38) peuvent être déplacés relativement l'un par rapport à l'autre dans un plan (plan X-Y), qui contient l'axe de rotation de pièce d'oeuvre (B), le plan de mouvement d'outil rapide (plan X-F2) étant en position inclinée par rapport au plan (plan X-Y) renfermant l'axe de rotation de pièce d'oeuvre (B) (angle d'incidence α).
  3. Machine selon la revendication 2, caractérisée en ce que le plan de mouvement d'outil rapide (plan X-F2) et le plan (plan X-Y) renfermant l'axe de rotation de pièce d'oeuvre (B) forment entre eux un angle d'incidence (α), qui vaut entre 2° et 10°.
  4. Machine (10) selon l'une des revendications précédentes, caractérisée en ce que le burin de gravure (50) peut être avancé de manière régulée en position (axe F2) dans la direction axiale, au moyen du deuxième agencement d'outil rapide (38).
  5. Machine selon l'une des revendications précédentes, caractérisée en ce que la pointe (74) formant l'extrémité (51) du burin de gravure (50), qui est dirigée vers la pièce d'oeuvre (L), est réalisée en métal dur ou carbure métallique.
EP07009742.3A 2006-06-06 2007-05-16 Machine d'usinage de pièces optiques, en particulier de lentilles de lunettes en plastique Not-in-force EP1864753B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006026524A DE102006026524A1 (de) 2006-06-06 2006-06-06 Maschine zur Bearbeitung von optischen Werkstücken, insbesondere von Kunststoff-Brillengläsern

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EP1864753A1 EP1864753A1 (fr) 2007-12-12
EP1864753B1 true EP1864753B1 (fr) 2013-10-30

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EP1916060B1 (fr) * 2006-10-26 2009-05-06 Satisloh AG Machine destinée au traitement de pièces optiques, en particulier de verres solaires en plastique
DE102007031703A1 (de) * 2007-07-06 2009-01-08 Satisloh Gmbh Maschine zur Bearbeitung von optischen Werkstücken, insbesondere von Kunststoff-Brillengläsern
FR2954196B1 (fr) 2009-12-21 2012-01-20 Essilor Int Procede d'usinage pour tournage d'une face d'un verre de lunettes
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FR2979558B1 (fr) * 2011-09-01 2013-10-04 Essilor Int Procede de surfacage d'une surface d'un verre de lunettes
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DE102015102899B4 (de) 2015-02-27 2018-02-01 Optotech Optikmaschinen Gmbh Fräsvorrichtung für die Brillenglasfertigung mit zwei Frässtationen
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CN114178957B (zh) * 2020-08-24 2023-03-17 佛山市顺德区美的洗涤电器制造有限公司 面壳打磨装置
CN112518347A (zh) * 2020-12-22 2021-03-19 韩金魁 一种多功能钻孔机
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DE102006026524A1 (de) 2007-12-13
EP1864753A1 (fr) 2007-12-12
US7480970B2 (en) 2009-01-27
US20070277357A1 (en) 2007-12-06

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