EP2542383B1 - Vorrichtung zum abblocken von optischen werkstücken, insbesondere brillengläsern - Google Patents

Vorrichtung zum abblocken von optischen werkstücken, insbesondere brillengläsern Download PDF

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Publication number
EP2542383B1
EP2542383B1 EP11707791.7A EP11707791A EP2542383B1 EP 2542383 B1 EP2542383 B1 EP 2542383B1 EP 11707791 A EP11707791 A EP 11707791A EP 2542383 B1 EP2542383 B1 EP 2542383B1
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EP
European Patent Office
Prior art keywords
block piece
nozzle
workpiece
cam
control
Prior art date
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Active
Application number
EP11707791.7A
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German (de)
English (en)
French (fr)
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EP2542383A1 (de
Inventor
Peter Johannes Lodewijk Geurts
Nathan Thomas Costelloe
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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Publication date
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Publication of EP2542383A1 publication Critical patent/EP2542383A1/de
Application granted granted Critical
Publication of EP2542383B1 publication Critical patent/EP2542383B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0057—Deblocking of lenses
    • 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
    • Y10T29/53—Means to assemble or disassemble

Definitions

  • the present invention relates generally to a device for blocking optical workpieces according to the preamble of claim 1.
  • blocking or “blocking” in the optical production is generally referred to the process in which an optical workpiece by means of a suitable material (low-melting alloy - so-called “Alloy” - or adhesive) is temporarily attached to a so-called “block piece”, or the block material is applied to the workpiece to form itself the block piece, which then serves to hold the workpiece in the respective processing machine and / or coating equipment. Accordingly, in optics production, that process is called “blocking off”, in which the optical workpiece is separated from the block piece / block material after its (end) processing (on surface and / or edge) and / or coating.
  • a suitable material low-melting alloy - so-called “Alloy” - or adhesive
  • the invention relates to a device for blocking spectacle lenses.
  • Spectacle lenses are mass blocked in so-called "RX workshops" before the respective blocked spectacle lens on its rear or front surface with regard to its optical effect and / or the edge for fitting in an associated spectacle frame with geometrically defined cutting edge (milling / turning) or geometrically indeterminate cutting edge (grinding / polishing) machined and / or coated on its back or front surface to obtain additional effects (increase in scratch resistance, anti-reflection properties, silvering, hydrophobic properties, etc.).
  • eyeglass lenses include optical lenses or blank blanks for spectacles made of common materials, such as polycarbonate, mineral glass, CR 39, HI index, etc. and with any (pre) form of the peripheral edge of the lens or of the lens blank, which are already processed and / or (pre) coated on one or both optically active surface (s) and / or on the edge prior to blocking but you do not have to.
  • the spectacle lens on its surface, where it is / is blocked, with a film, a paint or the like. be provided to protect this surface from contamination and damage and / or to improve the adhesion properties between spectacle lens and block material, without being specifically mentioned below in each case.
  • a pressure medium such as water is used to release the spectacle lens from the block by applying hydraulic forces, either from “inside” over one Pressure medium channel in the block piece, which opens at the the spectacle lens facing block surface of the block piece (eg DE 10 2005 038 063 A1 , Fig. 12; WO 03/018253 A1 . Fig. 4 ), or from "outside” by means of a high-pressure water jet discharged from a nozzle, which impinges on an edge location between block piece and spectacle lens (for example EP 2 042 265 A1 respectively. WO 2008/003805 A1 . Fig. 1 ).
  • a pressure medium such as water
  • a disadvantage of the "internal" application of the hydraulic forces is the fact that the block piece is provided with open to the block surface cavities, which preclude a desirable full-surface support of the lens on the block piece. Although the opening in the block area in principle be reduced in size to achieve an approximately full-surface support. But then hardly can apply the hydraulic forces that are required to separate the lens from the block piece.
  • the blocking method disclosed there has been developed specifically for blocking lenses blocked with a thermoplastic block material.
  • a melting of the block material is first by immersing the composite of spectacle lens, Block material and block piece forced into a bath with hot water.
  • block piece and block material as well as a protective film on the spectacle lens are detached from the spectacle lens by means of a high-pressure water jet.
  • the jet water is heated to a temperature between 50 ° C and 65 ° C in order to further soften the block material and finally to liquefy as a result of the heating.
  • the high-pressure water jet fan here relatively wide and is also rotated about the longitudinal axis of the nozzle to get under the protective film on the rotating spectacle lens and to lift it from the lens.
  • the invention has for its object to provide a simple design device for blocking optical workpieces, in particular eyeglass lenses, by means of which the optical workpieces as safe as possible, damage-free and can be blocked quickly.
  • a device for blocking optical workpieces in particular spectacle lenses, which has a first movement device for rotating a workpiece blocked on a block piece about a workpiece axis of rotation, a nozzle for delivering a high-pressure printing medium jet in a direction substantially transverse to the workpiece axis.
  • An axis of rotation at a point of impact in an edge region between the block piece and the workpiece and a second movement means for generating a relative movement between the nozzle and the workpiece comprises;
  • the second movement means comprises a nozzle guide portion on which the nozzle is mounted and by means of which the nozzle is cam-controlled with respect to the block piece, i. mechanically form-fitting positionable to direct the high-pressure fluid pressure jet in a defined manner to the point of impact.
  • the high-pressure medium high-pressure jet unlike the generic state of the art, no longer or less coincidentally hits the separation point between block piece and block material or the separation point between the block material and the workpiece, but can be directed due to the positioning of the nozzle with respect to the block piece targeted to the respective separation point, it is possible to block the workpiece much faster, which is the device of the invention in particular predestined for use in RX workshops.
  • a fast blocking operation can continue to be carried out conducively with a relatively high pressure of the pressure medium, without the risk that the workpiece will be damaged by the pressure medium high-pressure jet, because it can be avoided by the selectively brought about relative position of the nozzle and block piece or workpiece in that the pressure medium high-pressure jet touches the workpiece in a critical manner.
  • workpieces can be blocked quickly, safely and without damage, without the need for upstream Ein- and / or softening processes and / or tempered pressure medium for blocking.
  • the nozzle with respect to the edge region between block piece and workpiece optimally for a fast and secure blocking of the workpiece
  • To position block piece namely the nozzle defined by the desired impact of the high-pressure fluid jet jet to be spaced and / or angularly adjusted so that the high pressure fluid jet jet impinges on the impact point at a predetermined angle of incidence.
  • CNC-position-controlled drives or the like. are here - as well as motors at all - basically expendable, so that the device can be designed very inexpensive.
  • the nozzle guide portion may include a sensing arm, which is operatively engageable with an outer peripheral surface of the block piece for blocking a clearance between an outlet opening of the nozzle and the point of impact of the high pressure jet pressure jet in the edge region between block piece and workpiece regardless of the peripheral contour of the outer peripheral surface of the Block piece and the angular position of the block piece to keep the workpiece rotation axis substantially constant.
  • the circumferential contour of the outer circumferential surface of the block piece may be oval, teardrop or kidney shaped, etc., in accordance with the shape of the eyeglass frame.
  • the movement of the nozzle guide portion is thus suitably cam controlled by this intervention, the "free" length of the high-pressure fluid jet or its distance covered changes between nozzle and point of impact not, so that the pressure conditions in / at the point of impact of the high pressure fluid jet do not change.
  • Tastarmlos which may also be adjustable, so it is possible to preset an optimal for a fast and safe blocking nozzle spacing and maintain during the blocking.
  • the sensing arm has a scanning roller rotatably mounted thereon, which is engageable with the outer peripheral surface of the block piece in operative engagement.
  • the nozzle guide section may comprise a control plate which cooperates with at least one control cam to set an angle of incidence, under which the high pressure fluid jet impinges when blocking on the impact point in the edge region between block piece and workpiece.
  • This further cam control makes it possible in a simple manner to also define and repeatably define the angular alignment of the nozzle with respect to the block piece or workpiece for fast and reliable blocking, so that the blocking process can also be optimized in this respect.
  • the high-pressure jet may be inclined relative to a plane perpendicular to the workpiece axis of rotation in the direction of the block piece, which also allows blocking of such workpieces, which have a smaller diameter than the block piece, or inclined away from the block piece, which when blocking on the workpiece generates a force component that faces away from the block piece and thus promotes the separation of workpiece and block piece.
  • the block surface of the block piece may be spherical, while the control surface of the at least one control curve is curved in a circular arc, wherein the at least one control curve with respect to the collet positionable, that the spherical block surface of the recorded in the collet block piece and the arcuate curved control surface the at least one control cam are arranged concentrically with respect to an imaginary center on the workpiece rotation axis.
  • control plate via two rotatably mounted guide rollers whose axes of rotation are spaced apart, with the at least one control cam can be brought into operative connection.
  • the control plate can advantageously roll or drive like a car on the control cam.
  • the nozzle guide portion has a nozzle holder on which the nozzle is mounted and the angle adjustable is connected to the control plate.
  • the second movement means may comprise a first lever mechanism, on which the nozzle guide portion is articulated and by means of which the nozzle guide portion of a rest position to a working position and vice versa is movable, which ensures good accessibility and disability as possible loading the Abblockvorraum.
  • the first lever mechanism can be as simple as possible Handling be forcibly coupled to the protective hood that is in the closed position of the guard of the nozzle guide portion in its working position, while in the open position of the guard the nozzle guide portion is in its rest position. Basically, this can be provided a linkage, gear mechanism or lever mechanism; With a view to particular cost-effective design, it is preferred if the first lever mechanism is forcibly coupled by means of a cable with the protective hood.
  • the first movement means comprises a spindle which carries at one end the collet for the block piece and is operatively connected at its other end with a handwheel over which the spindle and thus the collet during blocking is manually rotatable.
  • the block piece can be easily rotated about the workpiece axis of rotation, which accelerates the Abblockvorgang compared to a - basically possible - Abblockvorgang with rotatably held block piece in the rule.
  • a motor drive is also not needed for this.
  • the block piece targeted to rotate in certain rotational angle positions or to hold in this, to influence the Abblockvorgang as desired.
  • a withdrawal device is provided with a suction head, which can be acted upon for blocking with a negative pressure to sezu on a remote from the block piece, second optically active surface of the workpiece, so that by means of the withdrawal device via the suction head a defined Peel force on the workpiece can be applied.
  • this is conducive to a fast blocking process, on the other hand it is prevented that the workpiece is detached uncontrollably during blocking or "flies away", which could lead to damage of the workpiece.
  • the stripping device can have a piston-cylinder arrangement pneumatically connected to the suction head for generating a negative pressure which can be actuated manually.
  • the stripping device comprises a second lever mechanism by means of which the suction head is manually pivotable from a rest position to a suction position and vice versa, and at least one spring, the biased by pivoting the suction head from its rest position into the suction position is to produce the peel force.
  • the aforementioned piston-cylinder arrangement with the second lever mechanism be operatively connected, so that by means of the pivotal movement of the second lever mechanism and the piston-cylinder arrangement is actuated to generate the negative pressure.
  • peel force and negative pressure can be generated in one movement.
  • a device for blocking lenses L as optical workpieces is numbered 10.
  • the blocking device 10 generally comprises a first movement device 12 for rotating a lens L blocked on a block piece B about a workpiece rotation axis 14, a nozzle 16 for discharging a high-pressure fluid pressure jet H (see FIG Fig. 6 ) in a direction substantially transverse to the workpiece axis of rotation 14 to an impact point A in an edge region between block piece B and spectacle lens L and a second movement means 18 for generating a relative movement between the nozzle 16 and the spectacle lens L.
  • the second movement means 18 has a nozzle guide portion 20, on which the nozzle 16 is mounted and by means of which the nozzle 16 with respect to the block piece B is positioned cam controlled to direct the high-pressure fluid jet H in a defined manner to the impact point A, as will be described in more detail below ,
  • the blocking device 10 has a welded sheet metal housing 22 which, together with a protective hood 24, delimits a working space 26 of the blocking device 10.
  • the sheet metal housing 22 has a lower trough portion 28, which also serves as a reservoir and catch basin for the tap water used in blocking.
  • the tub section 28 is provided with a drain valve 30 (FIG. Fig. 2 ), via which the tub section 28 can be emptied if necessary, if, for example, the water used to be replaced.
  • adjustable leveling elements 32 are provided at the four corners of the tub portion 28, via which the blocking device 10 can be placed on a floor and this can be brought into balance against it.
  • the protective hood 24 is made of a transparent material to allow the operator during the blocking a clear view into the working space 26, and consists of a left and a right, substantially circular segment-shaped side wall 34, 36 and a curved or in cross section Seen in each case via a pivot bearing 40 hinged to the sheet metal housing 22 side walls 34, 36 are bonded to the front wall 38 such that the side walls 34, 36 relative to the pivot bearing 40 in the radial direction a few millimeters above the curved front wall 38th survive (see Fig. 2 ).
  • These projecting portions of the side walls 34, 36 form guide profiles over which the protective cover 24 in associated outbreaks 42 (see. Fig. 1 ) is additionally guided on both sides in an upper region of the sheet metal housing 22.
  • the trailing edge of the front wall 38 is further reinforced by means of a metal profile strip 44 which is bolted to the protective cover 24 and glued.
  • a metal profile strip 44 which is bolted to the protective cover 24 and glued.
  • On the front wall 38 of the protective hood 24 is in a lower front portion substantially centrally mounted a handle 46, by means of which the guard 24 selectively from a closed position in which it closes the working space 26 of the Abblockvoriques 10, in an open position in which they allows access to the working space 26, and vice versa movable, ie about the pivot bearing 40 is pivotable.
  • lower corner regions of the sheet metal housing 22 are finally mounted on both sides stops 48 with rubber buffer, which limit the pivotal movement of the protective cover 24 in the open position.
  • the high-pressure pump 50 is connected via a plurality of vibration isolators 52 (see Fig. 2 ) mounted on a mounting plate 54, which in turn is mounted above the tub portion 28 on the sheet metal housing 22.
  • the high-pressure pump 50 comprises a pressure connection 56, which is hydraulically connected to the nozzle 16 via an elastic high-pressure hose 58 indicated only by dashed lines, and a suction connection 60, which is fluid-connected to the tub section 28 via a piece of tubing reaching to the bottom of the tub section 28, not shown is, so that the high-pressure pump 50 water from the tub section 28 can suck.
  • a filter (not shown) in the hose piece prevents any dirt particles from being sucked in and causing damage to the lens L and / or the blocking device 10.
  • a pressure regulator 62 By means of a pressure regulator 62, the pressure of the water discharged via the pressure connection 56 can be adjusted.
  • a switch arrangement 64 is provided which, according to FIG Fig. 2 is mounted from the inside to a front plate 66 of the sheet metal housing 22.
  • the switch assembly 64 is operable by slight manual lowering of the guard 24 from its closed position against spring force. More specifically, the switch assembly 64 has two series-connected safety switches, which cooperate with a lower edge of the front wall 38 of the protective cover 24 as follows: During a closing movement of the protective hood 24, the lower edge of the protective hood 24 in its closed position first comes to two compression springs (not shown) Appendix, which are mounted in the region of the switch assembly 64 on the sheet metal housing 22 and the lower edge of the switch assembly 64 spaced.
  • the switch assembly 64 operatively engaged with the safety switches are closed. Relieves the operator the handle 46, the springs press the protective cover 24 back up and the safety switch of the switch assembly 64 are opened. In this way, it is ensured that the high-pressure pump 50 can be activated only when the protective hood 24 is closed and, moreover, for an operator intervention (further depression of the protective cover 24 via the handle 46 against spring force) is required; as soon as the handle 46 is released by the operator, the high pressure pump 50 goes off.
  • the first movement means 12 comprises a spindle 68 which carries at its one, projecting into the working space 26 end of a collet 70 for the block piece B and at its other, with respect to the sheet metal housing 22 outer end with a handwheel 72 is operatively connected via the Spindle 68 and thus the collet 70 when blocking manually around the workpiece rotation axis 14 is rotatable.
  • the spindle 68 is by means of suitable bearings (not shown), for example, plastic plain bearings rotatably mounted in a spindle housing 74 which at 76 (see Fig. 1 ) is firmly bolted to a side wall of the sheet metal housing 22.
  • the collet 70 is preferably one which blocks the block piece B in a manner known per se by radially acting clamping forces on a substantially cylindrical clamping section S of the block piece B (see FIG Fig. 7 ) to hold.
  • a tensioning lever 78 is provided, which is operatively connected via a extending through the spindle 68 pull rod 80 with the collet 70, so that the collet 70 can be selectively opened by means of the clamping lever 78 or closed to tension the block piece B.
  • the other mechanical components of the Abblockvoriques 10 are supported by a stamped from sheet metal (or cut by laser) and multiply curved body 82, which sits above a in the tub portion 28 of the sheet metal housing 22, according to Fig. 2 folded front and rear, water-permeable perforated plate 84 in the working space 26 is arranged.
  • the main body 82 has a bottom portion 86, to which on the in the Fig. 1 and 3 to 5 right side a flange 88 connects.
  • the flange portion 88 of Base 82 lies on a metal plate 90 (only in Fig. 1 partially visible), which is attached to a side wall of the sheet metal housing 22, on and is screwed thereto.
  • a stamped from sheet metal or cut by laser
  • multiply curved body 82 which sits above a in the tub portion 28 of the sheet metal housing 22, according to Fig. 2 folded front and rear, water-permeable perforated plate 84 in the working space 26 is arranged.
  • the main body 82 has a
  • the base body 82 is adjoined by a side wall 92 which, according to FIG Fig. 1 . 4 . 5 and 7 forms a right angle with a rear wall 94 of the base 82.
  • the side wall 92 has front / bottom a recess 96 which is penetrated by the spindle 68.
  • the side wall 92 is screwed to the spindle housing 74, which in turn is fastened by means of the screw 76 on the sheet metal housing 22.
  • the base body 82 on the right (on the flange portion 88) and left (at the recess 96) respect.
  • the sheet metal housing 22 is supported and fastened by means of fewer screws, which facilitates access and removal in case of service.
  • the core of the second movement device 18 is the nozzle guide section 20, which essentially comprises a control plate 98, a nozzle holder 100 and a sensing arm 102.
  • the control plate 98 is connected via two guide rollers 104 rotatably mounted thereon, whose parallel axes of rotation are spaced from each other, with (at least) a control cam 106 can be brought into operative connection, as will be explained in more detail.
  • the nozzle holder 100 has a support plate 108 and a clamping piece 110 which form a right angle and are fixedly connected to each other.
  • the substantially parallel to the control plate 98 extending support plate 108 is according to Fig. 1 attached to the control plate 98 by means of two screws. While the in Fig. 1 left, lower screw passes through a hole in the control plate 98, the other extends, in Fig. 1 right, upper screw through an arcuately extending slot 112 in the support plate 108 therethrough so that the nozzle holder 100 is angularly connected to the control plate 98.
  • the clamping piece 110 has according to Fig. 5 a receiving bore 114 for the nozzle 16 and is slotted starting from the receiving bore 114 to its side facing away from the support plate 108, free end (slot 116), wherein a screw 118 passes through a provided in the region of the slot 116 through hole in the clamping piece 110, so that the nozzle 16 can be clamped indirectly via the screw 118 in the receiving bore 114 in order to replaceably mount the nozzle 16 on the nozzle holder 100.
  • FIG. 5 front upper portion of the clamping piece 110 is held above the receiving bore 114 for the nozzle 16 of the sensing arm 102 by means of a clamping screw 120 in an associated recess of the clamping piece 110.
  • a cam roller 122 is rotatably mounted on the sensing arm 102, via which the sensing arm 102 with an outer peripheral surface U of the block piece B can be brought into operative engagement, as in Fig. 6 shown.
  • the scanning roller 122 and the sensing arm 102 serve to support the nozzle guide portion 20 on the outer peripheral surface U of the block piece B in the manner of cam control, thus ensuring that the position of the nozzle 16 is always on the outer contour of the block piece B is adjusted and the nozzle 16 has an optimal distance to the bonding gap between the block piece B and lens L.
  • control plate 98 of the nozzle guide portion 20 cooperates with the (at least one) cam 106 to an impact angle ⁇ (see Fig. 6 ), under which the high-pressure fluid jet H impinges when blocking on the impact point A in the edge region between block piece B and lens L, as will be described in more detail below.
  • the second movement device 18 has a first lever mechanism 126, on which the nozzle guide section 20 is articulated and by means of which the nozzle guide section 20 is moved from a rest position (FIG. Fig. 1 to 5 ) into a working position ( Fig. 6 ) and vice versa is movable.
  • the first lever mechanism 126 has in particular the Fig. 5 and 6 a guide arm 128 which is mounted pivotably about a pivot axis 130 on two angle plates 132, which in turn are screwed to the bottom portion 86 of the base 82.
  • the first lever mechanism 126 comprises a support arm 134, which is articulated on the guide arm 128 at the end of the guide arm 128 facing away from the angle plates 132, so that the support arm 134 can be pivoted relative to the guide arm 128 about a further pivot axis 136 parallel to the first pivot axis 130 , In the region of the pivot axis 136, a lever extension 138 is fixedly connected to the support arm 134, while a sheet-metal bracket 140 is fastened substantially centrally on the guide arm 128.
  • a tension spring 142 is tensioned, which applies a torque to the support arm 134, which endeavors to support the arm 134 with respect to the guide arm 128 in the Fig. 5 and 6 to pivot clockwise about the pivot axis 136.
  • the control plate 98 of the nozzle guide portion 20 hinged so that the control plate 98 with respect to the support arm 134 about a third pivot axis 144 (in Fig. 5 hidden by the clamping screw 120) is pivotable, which runs parallel to the other two pivot axes 130, 136.
  • the block face F of the block piece B spherically formed (radius r of the block surface F), while the control surface 146 of the cam 106 is curved in a circular arc (radius R of the control surface 146), wherein the control cam 106 is positioned relative to the collet 70 that the Spherical block face F of the recorded in the collet 70 block piece B and the circular arc curved control surface 146 of the cam 106 with respect to an imaginary center P on the workpiece axis of rotation 14 are concentrically arranged.
  • the nozzle holder 100 can be angularly preset eg with respect to the control plate 98 (slot 112) that the high-pressure fluid jet H always impinges tangentially to the block face F at the impact point A.
  • the predetermined impact point A of the high-pressure fluid high pressure jet H can in principle also be at the point of separation between spectacle lens L and block material M.
  • the predetermined impingement point A of the high-pressure fluid jet H is in the boundary region between block piece B and block material M, so that the block material M initially remains as protection on the lens L and can be removed by hand from the lens L at a suitable time ,
  • the first lever mechanism 126 is also forcibly coupled to the protective hood 24 in such a way that in the closed position the guard 24 - unlike in the Fig. 1 and 2 shown - the nozzle guide portion 20 actually in its lowered working position (see. Fig. 6 ) is located while in the open position of the protective cover 24 of the nozzle guide portion 20 in its raised rest position (see, eg Fig. 3 ) is located.
  • this forced coupling of the movements of protective hood 24 and lever mechanism 126 is realized by means of a cable 148.
  • the cable 148 comprises a steel cable 150, one end of which according to Fig. 2 in the middle of the metal profile strip 44 of the guard 24 is fixed to a first Seilklemmung 152.
  • the other end of the steel cord 150 is secured to the rear wall 94 of the main body 82 by means of a second cable clamp 154, as in Figs Fig. 2 and 5 can be seen.
  • the steel cable 150 extends over a total of four on the rear wall 94 of the main body 82 as in Fig. 5 rotatably mounted guide rollers 156.
  • a cable pulley 158 is rotatably mounted on the pivot axis 136, from the in Fig. 5 only a part can be seen.
  • the cable pulley 158 is between the in the Fig.
  • a curve holder 160 is provided on which a plurality of, here five cams 106 are mounted with differently curved control surfaces 146.
  • the curve holder 160 is designed to be positionable relative to the control plate 98 of the nozzle guide portion 20, so that in accordance with the curvature of the block surface F of each clamped in the collet 70 block piece B a suitable cam 106 of the control plate 98 is opposite.
  • the base cam 162 has an end stop 166 for the control plate 98 which "stands" in the rest position of the nozzle guide portion 20 with its guide rollers 104 on the base cam 162 standing.
  • the curve holder 160 punched out and bent from a metal sheet is mounted pivotably on the side wall 92 about a pivot axis 168.
  • the lower end of the cam holder 160 is guided in a top-slotted guide block 170, which allows an unobstructed pivoting of the cam holder 160 about the pivot axis 168, the curve holder 160 but in the lateral direction, ie in the Fig. 3 and 6 fixed to the right and left.
  • the guide block 170 itself is according to Fig. 3 firmly screwed to the side wall 92 of the base 82.
  • a spherical detent button 172 is provided with spring action (in Fig. 6 omitted for clarity) whose locking pin 174 is engaged in one of five numbered holes 176 in the side wall 92 of the body 82 as desired.
  • Various cams 106 can thus by pulling the locking knob 172 against spring force, wherein the locking pin 174 of the respective bore 176 disengaged, pivoting the cam holder 160 about the pivot axis 168 and then releasing the locking knob 172, wherein the locking pin 174 with the opposite bore 176 is engaged, to be selected.
  • the various curvatures of the control surfaces 146 of the selectable cams 106 and the different curvatures of the block surfaces F of the block pieces B used are as discussed above with reference to FIGS Fig. 6 already described (radii R, r; center P) - in direct relation to each other to ensure that the nozzle 16 is optimally spaced and oriented independently of the outer diameter of the outer peripheral surface U of the block piece B with respect to the block piece B.
  • each cut from a sheet metal cam 106 has at its in Fig. 8 right, upper end in the direction of the side wall 92 projecting projection 178 which is mounted in an associated recess in a comb-like upper edge of a holding portion 180 of the cam holder 160.
  • each cam 106 has two height-spaced, projecting in the direction of the side wall 92, hook-shaped projections 184, which - similar to a shelf support - can be mounted in each associated recesses 186 in curve holder 160.
  • clamping screws 188 are provided which are screwed into threaded holes in the holding portion 180 of the cam holder 160 and obviously prevent the respective cam 106 from the cam holder 160 can be disengaged.
  • the lens L according to the Fig. 6 and 7 is blocked with its first optically effective surface cx by means of the block material M on the block surface F of the block piece B, is the second optically effective surface cc of the blocked spectacle lens L in the blocking device 10 a removal device 190 with a suction head 192 opposite, which is acted upon for blocking with a negative pressure to sezu on the second optically active surface cc, so that by means of the peeling device 190 via the suction head 192 a peel force on the lens L applied is.
  • the puller 190 has a second lever mechanism 194, by means of which the suction head 192 manually from a rest position to a suction position (in the figures always shown) and vice versa is pivotable, and has at least one spring 196, by pivoting the suction head 192 is biased from its rest position into the suction position to produce the peel force.
  • the second lever mechanism 194 is operatively connected to a piston-cylinder arrangement 198 of the stripping device 190, which is pneumatically connected to the suction head 192 via a pneumatic hose 200 indicated by broken lines in the figures, so that by means of the pivoting movement of the second lever mechanism 194 also the piston Cylinder assembly 198 is manually operable to generate a vacuum in the suction head 192.
  • the second lever mechanism 194 has a first and a second lever 202, 204, which at their free ends in each case with a handle 203, 205 (in Fig. 6 removed) are provided.
  • the first lever 202 is articulated with its end facing away from the handle 203 between two angle plates 206, 208 about a pivot axis 210 pivotally.
  • the angle plates 206, 208 are in turn screwed in a lower, central region of the rear wall 94 of the base body 82 fixed to the rear wall 94.
  • lower angle plate 208 is a according to Fig. 7 schraubver constituer stop 212 mounted, the pivoting movement of the first lever 202 about the pivot axis 210 in the counterclockwise direction in Fig.
  • a motion damper 214 disposed (see also Fig. 6 ), which delays the movement of the lever mechanism 194 upon detachment of the lens L from the block piece B, to minimize the risk that when the lever mechanism 194 is pivoted away from the block piece B, the blocked lens L will detach from the suction head 192 and be damaged as a result.
  • the second lever 204 is pivoted about a further pivot axis 216 to the first lever 202.
  • a torque in the counterclockwise direction Fig. 7 can apply, while leaving the second lever 204 but powerless.
  • a compression spring 220 clamped which is held on the respective lever 202, 204 by means of a spring bearing 222.
  • the piston-cylinder arrangement 198 is arranged between the levers 202, 204, wherein a piston rod 224 of the piston-cylinder arrangement 198 is pivotable about a pivot axis 226 on the first lever 202 is, while a cylinder housing 228 of the piston-cylinder assembly 198 is pivotable about a further pivot axis 230 pivotally mounted on the second lever 204.
  • the compression spring 220 tends to push the levers 202, 204 apart, but is urged by the piston-and-cylinder arrangement 198 in its extended state (in FIG Fig. 7 shown). Accordingly, to achieve the collapsed state of the piston-cylinder assembly 198, the compression spring 220 is to be over-pressed.
  • the suction head 192 is attached to the first lever 202. More specifically, the suction head 192 consists of a suction piece 234 which is fixedly attached to the first lever 202 and connected via the pneumatic hose 200 to the piston-cylinder assembly 198, and an optionally bellows-shaped elastic suction 236 with a sealing lip 238, the the second optically effective surface cc of the spectacle lens L can be made to abut tightly so as to suck the sucker 236 on the spectacle lens L.
  • the second lever mechanism 194 by applying a force on the handle 205 of the second lever 204 in total clockwise in Fig. 7 can pivot about the pivot axis 210.
  • the tension spring 196 is tensioned, the compression spring 220 due to their harder design but not yet compressed.
  • the pressure spring 220 and the piston-cylinder arrangement 198 are compressed, with the air present in the pressure space 232 passing through the pneumatic tube 200 and the suction head 192 the sealing lip 238 is displaced away.
  • a blocking process taken as a whole, is as follows: First, the protective hood 24 of the blocking device 10 is opened via the handle 46, so that the operator gains access to the working space 26. Now, the clamping lever 78 is to be solved on the handwheel 72, whereupon the collet 70 opens. As a result, a block piece B with lens L blocked thereto is inserted, and the collet 70 is closed by the cocking lever 78 to clamp the block piece B at its chucking portion S. Now, according to the geometry of the block face F of the block piece B to select the corresponding control cam 106 (pulling out the locking knob 172, suitable pivoting of the cam holder 160, re-locking the locking pin 174 in the desired pivot position of the cam holder 160).
  • the lever mechanism 194 of the puller 190 is pivotal as described above to seize the sucker 236 on the lens L, wherein both a vacuum generated (piston-cylinder assembly 198, compression spring 220) and a defined peel force is generated (tension spring 196).
  • the guard 24 is to close, wherein the lever mechanism 126 of the second movement means 18 is lowered via the cable 148 and the nozzle guide portion 20 from its parked position on the base cam 162 with the provided on the control plate 98 guide rollers 104 on the preselected cam 106 down in his Working position rolls, in which the cam follower 122 on the sensing arm 102 of the nozzle guide portion 20 on the outer peripheral surface U of the block piece B comes into contact.
  • the high-pressure pump 50 switches on (switch arrangement 64), whereupon the nozzle 16 delivers the high-pressure medium jet H while the operator slowly turns the hand wheel 72.
  • the nozzle is both defined due to the "double" cam control of the nozzle guide portion 20 (control plate 98 with guide rollers 104 / control surface 146 of the cam 106 and cam 102 with cam roller 122 / outer peripheral surface U of the block piece B) with respect to the impact point A of the high-pressure fluid pressure H. spaced (clear distance a) as well as defined (angle ⁇ ).
  • the block material M can be a UV-curing adhesive mixture, for example, as described in US Pat WO 2009/003660 A1 is described.
  • the block piece B shown here consists of a plastic and is the subject of WO 2009/106296 A1 as well as the older German patent application 10 2008 051 833.6 to which reference should be made at this point for the further structure and functions of block piece B.
  • a suitable (on) block method and a suitable (On) block device is ultimately on the WO 2009/135689 A1 to refer.
  • An apparatus for blocking optical workpieces which includes a first moving means for rotating a workpiece blocked on a block piece about a workpiece rotation axis, a nozzle for discharging a high-pressure printing fluid jet in a direction substantially transverse to the workpiece rotation axis Impact location in an edge region between the block piece and the workpiece and a second movement means for generating a relative movement between the nozzle and the workpiece comprises.
  • the second movement device has a nozzle guide section on which the nozzle is mounted and by means of which the nozzle can be positioned cam-controlled with respect to the block element in order to apply the high-pressure medium jet in a defined manner to the point of impact to judge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP11707791.7A 2010-03-04 2011-02-23 Vorrichtung zum abblocken von optischen werkstücken, insbesondere brillengläsern Active EP2542383B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010334A DE102010010334B4 (de) 2010-03-04 2010-03-04 Vorrichtung zum Abblocken von optischen Werkstücken, insbesondere Brillengläsern
PCT/EP2011/000862 WO2011107227A1 (de) 2010-03-04 2011-02-23 Vorrichtung zum abblocken von optischen werkstücken, insbesondere brillengläsern

Publications (2)

Publication Number Publication Date
EP2542383A1 EP2542383A1 (de) 2013-01-09
EP2542383B1 true EP2542383B1 (de) 2014-04-16

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EP11707791.7A Active EP2542383B1 (de) 2010-03-04 2011-02-23 Vorrichtung zum abblocken von optischen werkstücken, insbesondere brillengläsern

Country Status (7)

Country Link
US (1) US9120196B2 (xx)
EP (1) EP2542383B1 (xx)
CN (1) CN102821912B (xx)
BR (1) BR112012022105B1 (xx)
DE (1) DE102010010334B4 (xx)
HK (1) HK1174306A1 (xx)
WO (1) WO2011107227A1 (xx)

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EP2963458B1 (en) 2014-07-05 2022-02-02 Satisloh AG Lens blank having a temporary grip coating for a method for manufacturing spectacle lenses according to a prescription
DE102015009973A1 (de) 2015-07-31 2017-02-02 Satisloh Ag Verfahren zur Bearbeitung von optischen Werkstücken, insbesondere Brillenlinsen aus Kunststoff
CN105290914B (zh) * 2015-09-16 2017-11-24 安徽科创智慧知识产权服务有限公司 一种镜片加工装置
DE102015121682A1 (de) 2015-12-14 2017-06-14 Optotech Optikmaschinen Gmbh Werkstück mit optischem Linsenrohling, Verfahren zu dessen Herstellung und Verfahren zu dessen Bearbeitung
DE102017001679B4 (de) * 2017-02-22 2019-05-09 Schneider Gmbh & Co. Kg Vorrichtung und Verfahren zum Abblocken einer Linse
EP3546122B1 (en) 2018-03-30 2020-10-21 Essilor International Lens holding block and method for blocking and unblocking an optical lens component
EP3636423A1 (en) * 2018-10-09 2020-04-15 Essilor International (Compagnie Generale D'optique) Method for manufacturing an optical element with a functional film
DE102019006505A1 (de) * 2019-09-16 2021-03-18 Satisloh Ag Hydraulikanordnung für eine Vorrichtung zum Abblocken von optischen Werkstücken, insbesondere Brillengläsern, von zugeordneten Blockstücken
DE102019006504A1 (de) * 2019-09-16 2021-03-18 Satisloh Ag Optikmaschine für das Behandeln und/oder Bearbeiten von optischen Werkstücken, wie Brillengläsern, sowie Abblockvorrichtung und Abblockverfahren hierfür
CN110549150A (zh) * 2019-09-19 2019-12-10 宁波镇海藤原电子科技有限公司 一种刀具安装自动再定位系统
CN112454073B (zh) * 2020-12-08 2022-05-13 南京灵雀智能制造有限公司 一种多焦点儿童眼镜加工装置
CN112706025B (zh) * 2020-12-23 2022-07-29 上饶市鑫锐光电有限公司 一种显微镜生产用光学冷加工设备
DE102021004831A1 (de) 2021-09-24 2023-03-30 Satisloh Ag Verfahren zur spanenden bearbeitung von optischen werkstücken, insbesondere brillenlinsen aus kunststoff
DE102021005202A1 (de) 2021-10-19 2023-04-20 Satisloh Ag Aufnahme für die Bearbeitung von optischen Werkstücken, insbesondere Brillenlinsen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015011031A1 (de) 2015-08-22 2017-02-23 Satisloh Ag Vorrichtung zur Randbearbeitung eines Linsenrohlings und Verfahren zur Herstellung von Brillenlinsen
EP3135430A1 (de) 2015-08-22 2017-03-01 Satisloh AG Vorrichtung zur randbearbeitung eines linsenrohlings und verfahren zur herstellung von brillenlinsen

Also Published As

Publication number Publication date
CN102821912A (zh) 2012-12-12
EP2542383A1 (de) 2013-01-09
US20130061462A1 (en) 2013-03-14
DE102010010334B4 (de) 2012-01-19
WO2011107227A1 (de) 2011-09-09
HK1174306A1 (en) 2013-06-07
BR112012022105A2 (pt) 2017-10-31
CN102821912B (zh) 2015-04-22
US9120196B2 (en) 2015-09-01
BR112012022105B1 (pt) 2021-04-06
DE102010010334A1 (de) 2011-09-08

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