WO1999022906A1 - Dispositif permettant de mesurer un gabarit a forme donnee - Google Patents

Dispositif permettant de mesurer un gabarit a forme donnee Download PDF

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Publication number
WO1999022906A1
WO1999022906A1 PCT/EP1998/006786 EP9806786W WO9922906A1 WO 1999022906 A1 WO1999022906 A1 WO 1999022906A1 EP 9806786 W EP9806786 W EP 9806786W WO 9922906 A1 WO9922906 A1 WO 9922906A1
Authority
WO
WIPO (PCT)
Prior art keywords
spectacle lens
holding shaft
lens holding
grinding
shoe
Prior art date
Application number
PCT/EP1998/006786
Other languages
German (de)
English (en)
Inventor
Lutz Gottschald
Original Assignee
Wernicke & Co. Gmbh
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 Wernicke & Co. Gmbh filed Critical Wernicke & Co. Gmbh
Publication of WO1999022906A1 publication Critical patent/WO1999022906A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/401—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
    • 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
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36369—Measuring object, spectacle glass, to derive position data

Definitions

  • the invention relates to a device for measuring a shaped disk in a CNC-controlled
  • Spectacle lens edge grinding machine with a computer for controlling the spectacle lens edge grinding machine, at least one grinding wheel in a grinding chamber and an angle-coded rotatable, relative to the grinding wheel radially and axially adjustable spectacle lens holding shaft.
  • Such a device in connection with a CNC-controlled spectacle lens edge grinding machine is described, for example, in German Offenlegungsschrift 34 10 040.
  • This known spectacle lens edge grinding machine has a rotatable grinding wheel fixedly arranged on a base plate in a grinding chamber, while a radially and axially adjustable spectacle lens holding shaft is arranged in a frame above the grinding wheel.
  • a circular disk is arranged which rests on a shoe which is height-adjustable by means of a servo motor.
  • This shoe can be adjusted by means of the servo motor in such a way that the distance of the spectacle lens holding shaft from the grinding wheel changes during the grinding process in accordance with the circumference of the spectacle lens to be shaped.
  • the shape data of the spectacle lens to be ground are stored in a computer for controlling the spectacle lens edge grinding machine.
  • the shaped disk is clamped in the eyeglass lens holding shaft instead of an eyeglass lens and placed on the stationary grinding disk. If the lens holder shaft is rotated, the changes Distance of the lens holder shaft from the grinding wheel in accordance with the shape of the shaped wheel.
  • the feeler shoe attached to the circular disc at the end of the lens holding shaft follows this movement and delivers radius values (r n ) to the computer which, in conjunction with the corresponding ones
  • Angle (p n ) of the spectacle lens holding shaft which are picked up by an angle encoder, form the data quantity of the shape data of the shaping disk, which can be used for the subsequent shaping of an eyeglass lens.
  • Eyeglass lens holding shaft which is different from the block or suction cup with which an eyeglass lens is inserted into an eyeglass lens holding shaft, it is necessary for the insertion of the shaped disc in the
  • Spectacle lens holding shaft to provide a special holder that fits on the one hand to the shaped disc and on the other hand corresponds to the receptacle for a conventional block or suction cup on the spectacle lens holding shaft.
  • the shaped wheel lies on the stationary grinding wheel during measurement, so that it is ground off when turning, which affects the accuracy of the measurement.
  • This wear and tear, since the shaped disks are generally made of plastic, can also result in area-wise smearing of the grinding disk, as a result of which the subsequent grinding process of a spectacle lens is impaired.
  • a device for measuring a spectacle frame or a spectacle lens or a shaped disk is also described, which is also integrated in a CNC-controlled spectacle lens edge grinding machine and in which a fixed probe shoe is located within the grinding chamber is arranged. To measure a shaped disc, it is clamped into the spectacle lens holding shaft in the grinding chamber, placed on the probe shoe and set in rotation.
  • encoders already present in the machine for controlling the grinding of a spectacle lens record the radius and angle values of the shaped disk and this amount of data is stored in the computer of the spectacle lens edge grinding machine and used for grinding a spectacle lens.
  • This device has proven itself in operation, since it can be used not only for measuring a shaped disc, but also for measuring a spectacle frame or a spectacle lens, but requires a special holder for the shaped disc when it is inserted into the spectacle lens holding shaft. Furthermore, with this device, an adaptation of the program for CNC control of the grinding process is necessary in order to be able to use the encoders available for this purpose to record the radius and angle values.
  • the invention is based on the problem of providing a CNC-controlled spectacle lens edge grinding machine with a simple device for measuring a shaped disc, which can be modified without any special changes
  • Eyeglass lens edge grinding machine and can be used in their control program.
  • a device for measuring a shaped wheel in a CNC-controlled spectacle lens edge grinding machine with a computer for controlling the spectacle lens edge grinding machine, at least one grinding wheel in a grinding chamber and an angle-coded rotatable and radially and axially adjustable spectacle lens holding shaft relative to the grinding wheel is proposed in the case of the invention for measuring a shaped disc, the spectacle lens holding shaft can be locked radially and axially, an angle encoder for receiving the
  • Spectacle lens holding shaft arranged, angled holder for a shaped disc and a fitting to the shaped disc radially displaceable probe shoe with a displacement sensor for recording the radius values (r n ) of the shaped disk are provided with respect to the spectacle lens holding shaft.
  • the end of the spectacle lens holding shaft which is led out of the grinding chamber has a customary receptacle for the angular fastening of a shaped disk.
  • a contact shoe which is radially displaceable with respect to the spectacle lens holding shaft, is in contact with the shaped disk arranged on this receptacle, the displacement sensor of which records the radius values (r n ) of the shaped disk, while at the same time the associated sensors are used by means of an angle transmitter
  • Angle of rotation (p n ) of the lens holder shaft are recorded.
  • the feeler shoe can preferably be arranged on a carriage and the carriage on one
  • Glasses edge grinding machine attached guide slide preferably a ball guide for the carriage can be provided to reduce friction.
  • This ball guide runs on a ball guide rod, and the slide can be secured against tipping by a guide rail on the slide parallel to the ball guide rod and at least one slide roller supported on the guide rail on the carrier for the ball guide rod.
  • the displacement sensor can advantageously consist of a toothed rack on the slide and an encoder on the carrier which engages with the toothed rack.
  • the feeler shoe If the feeler shoe is acted upon by means of spring force m in the direction of the spectacle lens holding shaft, it can be moved by hand m to a position radially distant from the spectacle lens holding shaft and preferably fixed in this position by means of a detent, so that a convenient placement and removal of a shaped plate is possible in this position .
  • Fig. 1 is a schematic front view of a
  • Spectacle lens edge grinding machine with the device according to the invention arranged thereon for measuring a shaped disk
  • Fig. 2 is a detailed view, partly in section, of the device according to the invention in plan view and
  • Fig. 3 is a side view of the invention
  • the spectacle lens edge grinding machine shown in FIG. 1 has a housing 1 with a grinding chamber 2, in which a pre-grinding wheel 4 with a cylindrical circumference and two facet grinding wheels 5, 6 with different facet grooves are arranged on a shaft 3.
  • a spectacle lens holding shaft composed of two halves 7, 8, of which the half shaft 7 can be axially displaced by means of a handle 9 in order to clamp a raw glass (not shown).
  • the grinding chamber 2 is during the grinding process by means of a not shown Hinged lid closed.
  • the shaft 3 is set in rapid rotation with the grinding wheels 4, 5, 6, while the raw glass held by the spectacle lens holding shaft 7, 8 rotates slowly.
  • the distance between the spectacle lens holding shaft 7, 8 and the shaft 3 with the grinding wheels 4, 5, 6 is controlled by a computer 10, in which control data for grinding the raw lens corresponding to the shape of a selected spectacle frame are stored.
  • An input keyboard 11 and a screen 12 are also arranged on the housing 1. Using the input keyboard 11, stored spectacle lens contours can be called up in a known manner and sent to the control of the spectacle lens edge grinding machine for processing the spectacle lens.
  • the input keyboard 11 for example the pupil distance, the axial position of a cylindrical or prismatic cut of the spectacle lens or the position of a close-up part.
  • a screen 12 serves to display the entered data. Furthermore, the circular raw glass and / or a spectacle lens ground according to the entered data can be displayed on the screen 12.
  • One end 14 of the half shaft 8 is led out laterally on the housing 1. At this end 14 there is a receptacle in the form of pins 15, 16 with different diameters for a shaped disk 17.
  • the shaped disk 17 has corresponding holes with a corresponding diameter, so that they can only be attached to the led out end 14 of the half shaft 8 in a certain angular position.
  • a feeler shoe 18 lies against the outer circumference of the shaped disk 17.
  • This tactile shoe 18 is fastened to a slide 19 which is radially movable with respect to the spectacle lens holding shaft 7, 8. 2 and 3, the carriage 19 is provided with a ball guide 20 through which a ball guide rod 21 is guided.
  • This ball guide rod 21 is fastened to a carrier 24, which in turn is screwed onto the housing 1 of the spectacle lens edge grinding machine.
  • a compression spring 22 is arranged concentrically to the ball guide rod 21, which is supported on the one hand on the carrier 24 and on the other hand on the slide 19 and the feeler shoe
  • a guide rail 23 is arranged on the slide 19 parallel to the ball guide rod 21, on which a guide roller 25, which is fastened to the carrier 24, is supported. Furthermore, a rack 26 is attached to the slide 19, which meshes with a gear on a carrier-fixed encoder 27, so that the encoder 27 serves as a displacement sensor for the radial movement of the feeler shoe 18 when measuring the shaped disk 17.
  • the carriage 19 can be retracted by hand from a position radially distant from the spectacle lens holding shaft 7, 8, 14 and remains in this position since a resilient latching element 29 is arranged on the carriage 19 and a detent lug 25 on the carrier 24.
  • Spectacle lens holding shaft 7, 8 with respect to the shaft 3 with the grinding wheels 4, 5, 6 determined radially and axially and the carriage 19 first m retracted the engaged position.
  • the shaped disk 17 to be measured is placed on the pins 15, 16, the slide 19 is disengaged and the feeler shoe 18 is brought into contact with the shaped disk 17.
  • the feeler shoe 18 follows the contour of the shaping disk 17, which is recorded in the form of radius values (r) by the encoder 27 and in the form of angle values by the encoder 13 and in the Computer 10 can be saved.
  • the amount of data recorded can then be used to shape a raw glass inserted between the half-waves 7, 8 according to the shaped disk 17 and to provide it with a facet.

Abstract

Dispositif permettant de mesurer un gabarit à forme donnée dans une rectifieuse pour bords de verres de lunettes à commande numérique qui est dotée d'un ordinateur destiné à la commande de ladite machine, d'au moins une meule située dans une chambre de rectification, d'un arbre de retenue de verre de lunettes rotatif, dont la position angulaire peut être codée, pouvant être déplacé radialement et axialement par rapport à la meule et pouvant être bloqué, d'un capteur angulaire destiné à détecter l'angle de rotation (ςn) de l'arbre de retenue du verre, d'un élément de fixation perpendiculaire situé sur une extrémité de l'arbre de retenue faisant saillie à l'opposé de la chambre de rectification et d'un sabot capteur adjacent au gabarit et mobile radialement par rapport à l'arbre de retenue, doté d'un capteur destiné à détecter les valeurs de rayon (rn) du gabarit.
PCT/EP1998/006786 1997-10-31 1998-10-26 Dispositif permettant de mesurer un gabarit a forme donnee WO1999022906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997148160 DE19748160A1 (de) 1997-10-31 1997-10-31 Vorrichtung zum Vermessen einer Formscheibe
DE19748160.4 1997-10-31

Publications (1)

Publication Number Publication Date
WO1999022906A1 true WO1999022906A1 (fr) 1999-05-14

Family

ID=7847223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/006786 WO1999022906A1 (fr) 1997-10-31 1998-10-26 Dispositif permettant de mesurer un gabarit a forme donnee

Country Status (2)

Country Link
DE (1) DE19748160A1 (fr)
WO (1) WO1999022906A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109396555A (zh) * 2018-09-18 2019-03-01 温州职业技术学院 一种持续输送磁环的全自动磁环倒角打磨设备
CN109396556A (zh) * 2018-09-18 2019-03-01 温州职业技术学院 一种全自动磁环倒角打磨设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106625103A (zh) * 2017-03-03 2017-05-10 刘琳 仿型石材磨边机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190450A1 (fr) * 1984-12-25 1986-08-13 Kabushiki Kaisha TOPCON Dispositif de mesure du profil de montures de lunettes
EP0432078A2 (fr) * 1989-10-27 1991-06-12 Indo Internacional S.A. Machine pour biseauter des lentilles
DE4107509A1 (de) * 1990-03-09 1991-10-02 Nikon Corp Linsenform-messgeraet und hiermit ausgeruestete schleifvorrichtung
US5465495A (en) * 1993-06-28 1995-11-14 Kabushiki Kaisha Takubo Seiki Seisakusho Lens shape measuring instrument

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3774730D1 (de) * 1986-01-30 1992-01-09 Topcon Corp Verfahren und einrichtung zum schleifen von linsen.
SE469158B (sv) * 1991-11-01 1993-05-24 Nobelpharma Ab Dental avkaenningsanordning avsedd att anvaendas i samband med styrning av en verkstadsutrustning

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190450A1 (fr) * 1984-12-25 1986-08-13 Kabushiki Kaisha TOPCON Dispositif de mesure du profil de montures de lunettes
EP0432078A2 (fr) * 1989-10-27 1991-06-12 Indo Internacional S.A. Machine pour biseauter des lentilles
DE4107509A1 (de) * 1990-03-09 1991-10-02 Nikon Corp Linsenform-messgeraet und hiermit ausgeruestete schleifvorrichtung
US5465495A (en) * 1993-06-28 1995-11-14 Kabushiki Kaisha Takubo Seiki Seisakusho Lens shape measuring instrument

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109396555A (zh) * 2018-09-18 2019-03-01 温州职业技术学院 一种持续输送磁环的全自动磁环倒角打磨设备
CN109396556A (zh) * 2018-09-18 2019-03-01 温州职业技术学院 一种全自动磁环倒角打磨设备

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