EP1173305B1 - Method and device for machining the peripheral edge of spectacle lenses - Google Patents
Method and device for machining the peripheral edge of spectacle lenses Download PDFInfo
- Publication number
- EP1173305B1 EP1173305B1 EP00920544A EP00920544A EP1173305B1 EP 1173305 B1 EP1173305 B1 EP 1173305B1 EP 00920544 A EP00920544 A EP 00920544A EP 00920544 A EP00920544 A EP 00920544A EP 1173305 B1 EP1173305 B1 EP 1173305B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spectacle
- holding shaft
- torque
- lens holding
- lens
- 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.)
- Expired - Lifetime
Links
Images
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
- 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
- B24B49/16—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 taking regard of the load
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled
Definitions
- the invention relates to a method and an apparatus for shaping the Peripheral edge of spectacle lenses and for the subsequent subsequent attachment of a facet with a driven eyeglass support shaft holding the eyeglass lens and one related to the spectacle lens holding shaft controlled movable machining tool.
- the processing pressure can be set so that it is at a large, the Radius touching the radius of the lens is just so large that a Slippage of the spectacle lens clamped in the spectacle lens holding shaft just avoided is, whereby the processing pressure can be increased with a smaller radius and this enlargement, on the one hand, from the permissible, due to the processing pressure the spectacle lens is dependent on the instantaneous torque exerted, on the other hand must not be so large that the lens is damaged or even destroyed.
- the processing print can be made using a quantity of data control a computer, which also processes the shape of the lens by means of this Controls amount of data.
- the control of the processing pressure can be controlled Change of the processing tool relative to the lens holding shaft Moving actuator transmitted torque cause, the change of the torque either by means of a torque-controlled servomotor or by means of a torque-controlled clutch between the servomotor and the deliverable Machining tool can be carried out.
- the invention is also based on the problem of a method and a device for shaping the peripheral edge of spectacle lenses and, if necessary, subsequent Attaching a facet to create a slippage in the Spectacle lens holding shaft clamped spectacle lens is avoided with certainty, and with which the shaping of the peripheral edge of glasses as quickly as possible Risk of breaking or damaging the glasses is feasible, this
- the method and the device are to be designed and constructed simply and none complicated control.
- a method of the type mentioned at the beginning suggested that the torque of the eyeglass lens support shaft be measured, the Shaping the peripheral edge of the rotating spectacle lens with a predeterminable adjustable power of the machining tool is performed if and as long as that Torque is less than or equal to a predetermined value and that on the lens effective force of the machining tool by reducing the speed of the Spectacle lens retaining shaft, if necessary to a standstill, is lowered if and as long as that Torque exceeds the specified value.
- the spectacle lens that is clamped into the spectacle lens holding shaft remains Machining force always below a predeterminable value, at which a slipping of the Eyeglass lenses certainly do not occur.
- This method has the advantage that it is independent of the control of the mold processing, if necessary also by retrofitting in a Eyeglass lens processing machine can be integrated. For example, that is The method according to the invention regardless of whether the shaping of the lens CNC-controlled or by copy grinding using a shaped disc.
- Measuring the torque of the spectacle lens holding shaft can be done in different ways perform, for example by measuring the torque of the drive motor Spectacle lens holding shaft. This torque is proportional to the current consumption, so that measuring the torque by measuring the current consumption of the drive motor can be achieved. Likewise, the torque of the drive motor on the housing of the Drive motor measure if this housing rotates slightly on an elastic Support is stored and the path of the elastic support is measured.
- the control of the rotational speed of the spectacle lens holding shaft can either take place in the manner that they are proportional to the exceeding of a predetermined value of the torque is reduced or by stopping the lens holding shaft for as long as a specified value of the torque is exceeded.
- the device for shaping the peripheral edge of spectacle lenses and for possibly then attaching a facet with a driven one holding the spectacle lens Spectacle lens holding shaft and one controlled with respect to the spectacle lens holding shaft Movable machining tool according to the invention has a measuring device for Measuring the torque of the lens holding shaft and a control device for the the force of the machining tool acting to reduce this force by reducing the speed of the lens holding shaft, if necessary to a standstill, if and as long as the torque exceeds a predetermined value.
- the control device can drive the spectacle lens holding shaft, in the sense of a Reduce the speed of the lens holding shaft, if necessary to a standstill.
- the measuring device for measuring the torque preferably has an elastic one Support of the rotatably mounted housing of the drive motor for the Spectacle lens holding shaft, being on the support with the control device cooperating displacement sensor can be arranged and the control device Decrease the speed of the lens holding shaft proportional to exceeding one predetermined path of the encoder.
- a particularly advantageous embodiment of the device according to the invention results itself when the elastic support is biased so that movement only at Exceeding the preload, i. H. of the predetermined torque occurs and at an electrical contact cooperates with the elastic support that the The power supply to the drive motor is interrupted when the pretension is exceeded.
- the method and the device according to the invention can be described in DE 196 16 Combine the method described in 536 A1, so that on the one hand the processing pressure in Dependence on the respective radius in the contact area of the machining tool touching glasses controlled from a large radius to a small radius is increased and, on the other hand, the speed of the spectacle lens holding shaft, if necessary, up to Standstill is reduced if and as long as the torque reaches the specified value exceeds.
- a processing tool in the form of a Shown grinding wheel package 1 to which one of two halves 2, 3 parallel to the axis existing lens holder shaft is arranged.
- a spectacle lens 5 Between the halves 2, 3 of the Spectacle lens holding shaft is a spectacle lens 5 provided with a block or suction cup 4 trapped.
- the shaping of the spectacle lens 5 takes place in such a way that the spectacle lens 5 is set in slow rotation by the spectacle lens holding shaft 2, 3 while the Grinding wheel package 1 rotates quickly.
- the distance between the Spectacle lens holding shaft 2, 3 with the clamped spectacle lens 5 relative to Grinding wheel package 1 corresponding to the shape of the spectacle lens to be processed a motion drive 15 controlled changes. It is also possible with fixed Grinding wheel package 1, the lens holder shaft 2 compared to the grinding wheel package 1 move.
- the spectacle lens holding shaft 2, 3 is driven by a gear motor 6 Gear sets 7, 8.
- the spectacle lens 5 must be driven by the gear motor 6 different torque can be rotated by the machining pressure between the Grinding wheel package 1 and the lens 5 and the respective radius of the lens 5 depends. If this torque exceeds a value known from experience, can a slipping of the clamped between the lens halves 2, 3. Glasses 5 occur, which must not occur under any circumstances, if the one to be processed Spectacle lens a near part aligned with respect to the optical axis or one cylindrical or prismatic cut, the axis position of the arrangement of the Spectacle glasses is specified in the spectacle frame.
- the respectively valid, maximum transferable torque is from the material of the Glasses and depending on their surface treatment.
- Highly anti-reflective glasses have, for example, a particularly low coefficient of friction compared to holding devices the lens holder shaft or attached blocks or suction cups.
- the housing of the geared motor 6 is rotatable in the lens processing machine stored and supported on an extension 9 on springs 10. These feathers are between fixed, adjustable abutments 1 arranged so that the springs 10 a adjustable bias can be given, which is a measure of that by the geared motor 6th deliverable torque is against a rotation of the housing of the geared motor 6 the force of the springs 10 occurs.
- a displacement sensor 12 is arranged parallel to the springs 10 and cooperates with a pin 13. Now becomes a certain, adjustable Torque of the geared motor 6 exceeded, a deflection of the pin 13 occurs opposite the encoder 12. This deflection is measured and transmitted to a Forwarded control device 14, the speed of the geared motor 6, if necessary, to Standstill.
- the bias of the springs 10 can be set so that from one determined torque, which is still below the permissible torque, a Deflection of the pin 13 occurs, via the displacement sensor 12 and the control device 14 causes a proportional reduction in the speed of the gear motor 6.
- a certain deflection, d. H. of a certain, higher torque the Control device 14 shut down the geared motor 6, and this geared motor 6 remains as long as the specified torque is exceeded.
- a particularly simple embodiment of the invention can consist in that instead a limit switch a limit switch in the area of the extension 9 or pin 13 is arranged is.
- This limit switch interrupts the power supply to the geared motor 6 if and as long a torque that can be set by the bias of the springs 10 is exceeded. As soon as the torque drops to or falls below the set value, closes the limit switch again, and the gear motor 6 continues the rotation of the Spectacle lens holding shaft 2, 3 on.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Formbearbeiten des Umfangsrandes von Brillengläsern und zum ggf. anschließenden Anbringen einer Facette mit einer das Brillenglas haltenden, angetriebenen Brillenglashaltewelle und einem mit Bezug auf die Brillenglashaltewelle gesteuert bewegbaren Bearbeitungswerkzeug.The invention relates to a method and an apparatus for shaping the Peripheral edge of spectacle lenses and for the subsequent subsequent attachment of a facet with a driven eyeglass support shaft holding the eyeglass lens and one related to the spectacle lens holding shaft controlled movable machining tool.
Um das Formbearbeiten des Umfangsrandes von Brillengläsern möglichst rasch ohne Gefahr des Zerbrechens oder Beschädigens der Brillengläser durchzuführen und dabei ein Durchrutschen des in die Brillenglashaltewelle eingespannten Brillenglases mit Sicherheit zu vermeiden, ist es gemäß der DE 196 16 536 A1 derselben Anmelderin bekannt, die Kraft, mit der das Bearbeitungswerkzeug gegen das Brillenglas geführt wird, in Abhängigkeit vom jeweiligen Radius im Anlagebereich des das Bearbeitungswerkzeug berührenden Brillenglases von einem großen Radius zu einem kleinen Radius gesteuert zu vergrößern. Hierdurch läßt sich der Bearbeitungsdruck so einstellen, daß er bei einem großen, die Schleifscheibe berührenden Radius des Brillenglases gerade so groß ist, daß ein Durchrutschen des in die Brillenglashaltewelle eingespannten Brillenglases gerade vermieden wird, wobei sich der Bearbeitungsdruck mit kleiner werdendem Radius vergrößern läßt und diese Vergrößerung einerseits wiederum vom zulässigen, durch den Bearbeitungsdruck auf das Brillenglas ausgeübten augenblicklichen Drehmoment abhängig ist, andererseits aber nicht so groß werden darf, daß dadurch das Brillenglas beschädigt oder gar zerstört wird.To shape the peripheral edge of glasses as quickly as possible without danger of breaking or damaging the lenses and doing so Slip through of the spectacle lens clamped in the spectacle lens holding shaft with certainty avoid, it is known from DE 196 16 536 A1 by the same applicant, the force with which the processing tool is guided against the lens, depending on respective radius in the contact area of the contacting tool Magnify glasses controlled from a large radius to a small radius. As a result, the processing pressure can be set so that it is at a large, the Radius touching the radius of the lens is just so large that a Slippage of the spectacle lens clamped in the spectacle lens holding shaft just avoided is, whereby the processing pressure can be increased with a smaller radius and this enlargement, on the one hand, from the permissible, due to the processing pressure the spectacle lens is dependent on the instantaneous torque exerted, on the other hand must not be so large that the lens is damaged or even destroyed.
Bei diesem bekannten Verfahren läßt sich der Bearbeitungsdruck mittels einer Datenmenge eines Rechners steuern, der auch das Formbearbeiten des Brillenglases mittels dieser Datenmenge steuert. Insbesondere läßt sich die Steuerung des Bearbeitungsdrucks durch Veränderung des vom das Bearbeitungswerkzeug relativ zur Brillenglashaltewelle bewegenden Stellmotors übertragenen Drehmoments bewirken, wobei sich die Veränderung des Drehmoments entweder mittels eines drehmomentgeregelten Stellmotors oder mittels einer drehmomentgeregelten Kupplung zwischen dem Stellmotor und dem zustellbaren Bearbeitungswerkzeug durchführen läßt.In this known method, the processing print can be made using a quantity of data control a computer, which also processes the shape of the lens by means of this Controls amount of data. In particular, the control of the processing pressure can be controlled Change of the processing tool relative to the lens holding shaft Moving actuator transmitted torque cause, the change of the torque either by means of a torque-controlled servomotor or by means of a torque-controlled clutch between the servomotor and the deliverable Machining tool can be carried out.
Das vorbeschriebene Verfahren und die dazugehörige Vorrichtung haben sich bewährt, jedoch ist hierfür eine verhältnismäßig aufwendige Steuerung erforderlich.The above-described method and the associated device have proven themselves however, this requires a relatively complex control.
Aus der DE 196 32 340 A1 ist es bekannt, das Drehmoment des Antriebsmotors einer Brillenglashaltewelle und/oder einer Schleifscheibenspindel in einer Brillenglasrandschleifmaschine zu messen und zum Steuern der Bearbeitungskraft zu verwenden. Eine Veränderung der Bearbeitungskraft wird durch Einwirkung auf eine Höhenverstellvorrichtung für die Brillenglashaltewelle erreicht, die so angesteuert wird, daß ein Zapfen absinkt, und zwar so, daß sich ein vorgegebener Schleifdruck im Berührungsbereich zwischen dem Rohglas und der Schleifscheibe ergibt.From DE 196 32 340 A1 it is known that the torque of the drive motor Spectacle lens holding shaft and / or a grinding wheel spindle in one Eyeglass lens edge grinder to measure and control the machining force too use. A change in the machining force is caused by an action on a Height adjustment device for the eyeglass lens shaft is reached, which is controlled so that a spigot sinks, so that a predetermined grinding pressure in the Contact area between the raw glass and the grinding wheel results.
Das vorbeschriebene Verfahren hat sich bewährt, läßt sich jedoch vereinfachen, wenn die Steuerung der Formgebung des Brillenglases von der Steuerung des Anpreßdrucks getrennt wird.The method described above has proven itself, but can be simplified if the Control of the shape of the lens separated from the control of the contact pressure becomes.
Der Erfindung liegt ebenfalls das Problem zugrunde, ein Verfahren und eine Vorrichtung zum Formbearbeiten des Umfangsrandes von Brillengläsern und zum ggf. anschließenden Anbringen einer Facette zu schaffen, mit denen ein Durchrutschen des in die Brillenglashaltewelle eingespannten Brillenglases mit Sicherheit vermieden wird, und mit denen das Formbearbeiten des Umfangsrandes von Brillengläsern möglichst rasch ohne Gefahr des Zerbrechens oder Beschädigens der Brillengläser durchführbar ist, wobei dieses Verfahren und die Vorrichtung einfach gestaltet bzw. aufgebaut sein sollen und keine komplizierte Steuerung erfordern sollen.The invention is also based on the problem of a method and a device for shaping the peripheral edge of spectacle lenses and, if necessary, subsequent Attaching a facet to create a slippage in the Spectacle lens holding shaft clamped spectacle lens is avoided with certainty, and with which the shaping of the peripheral edge of glasses as quickly as possible Risk of breaking or damaging the glasses is feasible, this The method and the device are to be designed and constructed simply and none complicated control.
Ausgehend von dieser Problemstellung wird bei einem Verfahren der eingangs erwähnten Art vorgeschlagen, daß das Drehmoment der Brillenglashaltewelle gemessen, das Formbearbeiten des Umfangsrandes des sich drehenden Brillenglases mit einer vorgebbaren, einstellbaren Kraft des Bearbeitungswerkzeugs durchgeführt wird, wenn und solange das Drehmoment kleiner oder gleich einem vorgegebenen Wert ist und die auf das Brillenglas wirkende Kraft des Bearbeitungswerkzeugs durch Vermindern der Drehzahl der Brillenglashaltewelle, ggf bis zum Stillstand, herabgesetzt wird, wenn und solange das Drehmoment den vorgegebenen Wert übersteigt.Based on this problem, a method of the type mentioned at the beginning suggested that the torque of the eyeglass lens support shaft be measured, the Shaping the peripheral edge of the rotating spectacle lens with a predeterminable adjustable power of the machining tool is performed if and as long as that Torque is less than or equal to a predetermined value and that on the lens effective force of the machining tool by reducing the speed of the Spectacle lens retaining shaft, if necessary to a standstill, is lowered if and as long as that Torque exceeds the specified value.
Dadurch bleibt die auf das in die Brillenglashaltewelle eingespannte Brillenglas wirkende Bearbeitungskraft stets unterhalb eines vorgebbaren Wertes, bei dem ein Durchrutschen des Brillenglases mit Sicherheit nicht eintritt. Dieses Verfahren hat den Vorteil, daß es sich unabhängig von der Steuerung der Formbearbeitung ggf auch durch Nachrüstung in eine Brillenglasrandbearbeitungsmaschine integrieren läßt. Beispielsweise ist das erfindungsgemäße Verfahren unabhängig davon, ob die Formbearbeitung des Brillenglases CNC-gesteuert oder durch Kopierschleifen anhand einer Formscheibe erfolgt.As a result, the spectacle lens that is clamped into the spectacle lens holding shaft remains Machining force always below a predeterminable value, at which a slipping of the Eyeglass lenses certainly do not occur. This method has the advantage that it is independent of the control of the mold processing, if necessary also by retrofitting in a Eyeglass lens processing machine can be integrated. For example, that is The method according to the invention regardless of whether the shaping of the lens CNC-controlled or by copy grinding using a shaped disc.
Das Messen des Drehmoments der Brillenglashaltewelle läßt sich auf unterschiedliche Weise durchführen, beispielsweise durch Messen des Drehmoments des Antriebsmotors der Brillenglashaltewelle. Dieses Drehmoment ist proportional zur Stromaufnahme, so daß sich das Messen des Drehmoments durch Messen der Stromaufnahme des Antriebsmotors erreichen läßt. Ebenso läßt sich das Drehmoment des Antriebsmotors am Gehäuse des Antriebsmotors messen, wenn dieses Gehäuse geringfügig drehbar an einer elastischen Abstützung gelagert ist und der Weg der elastischen Abstützung gemessen wird.Measuring the torque of the spectacle lens holding shaft can be done in different ways perform, for example by measuring the torque of the drive motor Spectacle lens holding shaft. This torque is proportional to the current consumption, so that measuring the torque by measuring the current consumption of the drive motor can be achieved. Likewise, the torque of the drive motor on the housing of the Drive motor measure if this housing rotates slightly on an elastic Support is stored and the path of the elastic support is measured.
Die Steuerung der Drehzahl der Brillenglashaltewelle kann entweder in der Weise erfolgen, daß sie proportional zur Überschreitung eines vorgegebenen Wertes des Drehmoments herabgesetzt wird oder indem die Brillenglashaltewelle solange stillgesetzt wird, wie ein vorgegebener Wert des Drehmoments überschritten ist.The control of the rotational speed of the spectacle lens holding shaft can either take place in the manner that they are proportional to the exceeding of a predetermined value of the torque is reduced or by stopping the lens holding shaft for as long as a specified value of the torque is exceeded.
Die Vorrichtung zum Formbearbeiten des Umfangsrandes von Brillengläsern und zum ggf. anschließenden Anbringen einer Facette mit einer das Brillenglas haltenden, angetriebenen Brillenglashaltewelle und einem mit Bezug auf die Brillenglashaltewelle gesteuert bewegbaren Bearbeitungswerkzeug weist erfindungsgemäß eine Meßvorrichtung zum Messen des Drehmoments der Brillenglashaltewelle und eine Steuervorrichtung für die auf das Brillenglas wirkende Kraft des Bearbeitungswerkzeugs zum Herabsetzen dieser Kraft durch Herabsetzen der Drehzahl der Brillenglashaltewelle, ggf bis zum Stillstand, auf, wenn und solange das Drehmoment einen vorgegebenen Wert übersteigt.The device for shaping the peripheral edge of spectacle lenses and for possibly then attaching a facet with a driven one holding the spectacle lens Spectacle lens holding shaft and one controlled with respect to the spectacle lens holding shaft Movable machining tool according to the invention has a measuring device for Measuring the torque of the lens holding shaft and a control device for the the force of the machining tool acting to reduce this force by reducing the speed of the lens holding shaft, if necessary to a standstill, if and as long as the torque exceeds a predetermined value.
Die Steuervorrichtung kann auf den Antrieb der Brillenglashaltewelle, im Sinne eines Herabsetzens der Drehzahl der Brillenglashaltewelle, ggf. bis zum Stillstand, wirken.The control device can drive the spectacle lens holding shaft, in the sense of a Reduce the speed of the lens holding shaft, if necessary to a standstill.
Vorzugsweise weist die Meßvorrichtung zum Messen des Drehmoments eine elastische Abstützung des drehbar gelagerten Gehäuses des Antriebsmotors für die Brillenglashaltewelle auf, wobei an der Abstützung ein mit der Steuervorrichtung zusammenwirkender Weggeber angeordnet sein kann und die Steuervorrichtung ein Herabsetzen der Drehzahl der Brillenglashaltewelle proportional zur Überschreitung eines vorgegebenen Weges des Weggebers bewirkt.The measuring device for measuring the torque preferably has an elastic one Support of the rotatably mounted housing of the drive motor for the Spectacle lens holding shaft, being on the support with the control device cooperating displacement sensor can be arranged and the control device Decrease the speed of the lens holding shaft proportional to exceeding one predetermined path of the encoder.
Eine besondere vorteilhafte Ausführungsform der erfindungsgemäßen Vorrichtung ergibt sich, wenn die elastische Abstützung so vorgespannt ist, daß eine Bewegung erst bei Überschreiten der Vorspannung, d. h. des vorgegebenen Drehmoments eintritt und bei der ein elektrischer Kontakt mit der elastischen Abstützung zusammenwirkt, der die Stromversorgung des Antriebsmotors bei Überschreiten der Vorspannung unterbricht.A particularly advantageous embodiment of the device according to the invention results itself when the elastic support is biased so that movement only at Exceeding the preload, i. H. of the predetermined torque occurs and at an electrical contact cooperates with the elastic support that the The power supply to the drive motor is interrupted when the pretension is exceeded.
Das erfindungsgemäße Verfahren und die Vorrichtung lassen sich mit dem in der DE 196 16 536 A1 beschriebenen Verfahren kombinieren, so daß einerseits der Bearbeitungsdruck in Abhängigkeit vom jeweiligen Radius im Anlagebereich des das Bearbeitungswerkzeug berührenden Brillenglases von einem großen Radius zu einem kleinen Radius gesteuert vergrößert wird und andererseits die Drehzahl der Brillenglashaltewelle ggf. bis zum Stillstand herabgesetzt wird, wenn und solange das Drehmoment den vorgegebenen Wert übersteigt. The method and the device according to the invention can be described in DE 196 16 Combine the method described in 536 A1, so that on the one hand the processing pressure in Dependence on the respective radius in the contact area of the machining tool touching glasses controlled from a large radius to a small radius is increased and, on the other hand, the speed of the spectacle lens holding shaft, if necessary, up to Standstill is reduced if and as long as the torque reaches the specified value exceeds.
Die Erfindung wird nachstehend anhand eines in der Zeichnung gezeigten Ausführungsbeispiels des näheren erläutert. Hinsichtlich der Einzelheiten einer erfindungsgemäß ausgestalteten Brillenglasrandbearbeitungsmaschine, wird auf die DE 196 16 536 A1 derselben Anmelderin verwiesen.The invention is illustrated below with reference to one in the drawing Exemplary embodiment explained in more detail. Regarding the details of a Spectacle lens edge processing machine designed according to the invention is referred to DE 196 16 536 A1 referenced by the same applicant.
Von einer Brillenglasrandschleifmaschine ist ein Bearbeitungswerkzeug in Form eines
Schleifscheibenpakets 1 dargestellt, zu dem achsparallel eine aus zwei Hälften 2, 3
bestehende Brillenglashaltewelle angeordnet ist. Zwischen den Hälften 2, 3 der
Brillenglashaltewelle ist ein mit einem Block oder Sauger 4 versehenes Brillenglas 5
eingeklemmt. Das Formschleifen des Brillenglases 5 erfolgt in der Weise, daß das Brillenglas
5 durch die Brillenglashaltewelle 2, 3 in langsame Drehung versetzt wird, während sich das
Schleifscheibenpaket 1 schnell dreht. Dabei wird der Abstand zwischen der
Brillenglashaltewelle 2, 3 mit dem eingespannten Brillenglas 5 relativ zum
Schleifscheibenpaket 1 entsprechend der Form des zu bearbeitenden Brillenglases mittels
eines Bewegungsantriebs 15 gesteuert verändert. Es ist auch möglich, bei feststehendem
Schleifscheibenpaket 1 die Brillenglashaltewelle 2 gegenüber dem Schleifscheibenpaket 1 zu
bewegen.From a spectacle lens edge grinding machine is a processing tool in the form of a
Shown
Angetrieben wird die Brillenglashaltewelle 2, 3 durch einen Getriebemotor 6 über
Zahnradsätze 7, 8.The spectacle
Während der Formbearbeitung muß das Brillenglas 5 durch den Getriebemotor 6 mit
unterschiedlichem Drehmoment gedreht werden, der vom Bearbeitungsdruck zwischen dem
Schleifscheibenpaket 1 und dem Brillenglas 5 sowie dem jeweiligen Radius des Brillenglases
5 abhängt. Überschreitet dieses Drehmoment einen durch Erfahrung bekannnten Wert, kann
ein Durchrutschen des zwischen den Brillenglashaltewellehälften 2, 3 eingespannten.
Brillenglases 5 eintreten, das auf keinen Fall auftreten darf, wenn das zu bearbeitende
Brillenglas ein bezüglich der optischen Achse winkelgenau ausgerichtetes Nahteil oder einen
zylindrischen oder prismatischen Schliff, dessen Achsenlage gegenüber der Anordnung des
Brillenglases im Brillengestell vorgegeben ist, aufweist.During the shaping process, the
Das jeweils gültige, maximal übertragbare Drehmoment ist von dem Material des Brillenglases und von deren Oberflächenbehandlung abhängig. Hochentspiegelte Brillengläser haben beispielsweise einen besonders niedrigen Reibwert gegenüber Haltevorrichtungen an der Brillenglashaltewelle oder aufgesetzten Blöcken oder Saugern.The respectively valid, maximum transferable torque is from the material of the Glasses and depending on their surface treatment. Highly anti-reflective glasses have, for example, a particularly low coefficient of friction compared to holding devices the lens holder shaft or attached blocks or suction cups.
Das Gehäuse des Getriebemotors 6 ist in der Brillenglasrandbearbeitungsmaschine drehbar
gelagert und stützt sich über einen Fortsatz 9 an Federn 10 ab. Diese Federn sind zwischen
gehäusefesten, einstellbaren Widerlagern 1 angeordnet, so daß sich den Federn 10 eine
einstellbare Vorspannung erteilen läßt, die ein Maß für das durch den Getriebemotor 6
abgebbare Drehmoment ist, bevor ein Verdrehen des Gehäuses des Getriebemotors 6 gegen
die Kraft der Federn 10 eintritt. Ein Weggeber 12 ist parallel zu den Federn 10 angeordnet
und wirkt mit einem Zapfen 13 zusammen. Wird nun ein bestimmtes, einstellbares
Drehmoment des Getriebemotors 6 überschritten, tritt eine Auslenkung des Zapfens 13
gegenüber dem Weggeber 12 ein. Diese Auslenkung wird gemessen und an eine
Steuervorrichtung 14 weitergeleitet, die die Drehzahl des Getriebemotors 6 ggf. bis zum
Stillstand herabsetzt.The housing of the geared motor 6 is rotatable in the lens processing machine
stored and supported on an extension 9 on
Beispielsweise kann die Vorspannung der Federn 10 so eingestellt sein, daß ab einem
bestimmten Drehmoment, das noch unterhalb des zulässigen Drehmoments liegt, eine
Auslenkung des Zapfens 13 eintritt, die über den Weggeber 12 und die Steuervorrichtung 14
ein proportionales Herabsetzen der Drehzahl des Getriebemotors 6 bewirkt. Bei Erreichen
einer bestimmten Auslenkung, d. h. eines bestimmten, höheren Drehmoments, kann die
Steuervorrichtung 14 den Getriebemotor 6 stillsetzen, und dieser Getriebemotor 6 bleibt
solange stillgesetzt, wie das vorgegebene Drehmoment überschritten wird.For example, the bias of the
Eine besonders einfache Ausführungsform der Erfindung kann darin bestehen, daß anstelle
eines Weggebers ein Endschalter im Bereich des Fortsatzes 9 oder Zapfens 13 angeordnet
ist. Dieser Endschalter unterbricht die Stromzufuhr zum Getriebemotor 6, wenn und solange
ein durch die Vorspannung der Federn 10 einstellbares Drehmoment überschritten wird.
Sobald das Drehmoment auf den eingestellten Wert absinkt bzw. darunter abfällt, schließt
sich der Endschalter wieder, und der Getriebemotor 6 setzt die Drehung der
Brillenglashaltewelle 2, 3 fort.A particularly simple embodiment of the invention can consist in that instead
a limit switch a limit switch in the area of the extension 9 or
Solange das auf die Brillenglashaltewelle 2, 3 wirkende Drehmoment kleiner als der
vorgegebene Wert ist, erfolgt ein kontinuierliches Schleifen des Umfangsrandes des
Brillenglases mit ununterbrochener Drehung der Brillenglashaltewelle 2, 3, während ein
intermittierendes Schleifen immer dann und solange erfolgt, wie dieses eingestellte
Drehmoment überschritten wird.As long as the torque acting on the spectacle
Claims (8)
- A method for form-machining the peripheral edge of spectacle lenses (5) and for optionally subsequently applying a facet with a driven spectacle-lens holding shaft (2, 3) which holds the lens (5) and a machining tool which is movable in controlled manner in relation to the spectacle-lens holding shaft (2, 3), comprising the steps:measuring the torque of the spectacle-lens holding shaft (2, 3),- form-machining the peripheral edge of the revolving lens (5) with a presettable, adjustable force of the machining tool (1), if and as long as the torque is less than or equal to a preset, adjustable value,- reducing the force of the machining tool (1) acting on the lens (5) by reducing the speed of rotation of the spectacle-lens holding shaft (2, 3), optionally until it stops, if and as long as the torque exceeds the preset value.
- A method according to Claim 1, in which the torque of the drive motor (6) for the spectacle-lens holding shaft (2, 3) is measured.
- A method according to Claim 1, in which the speed of rotation of the spectacle-lens holding shaft (2, 3) is reduced proportionally to the amount by which the preset value of the torque is exceeded.
- A method according to Claim 1, in which the spectacle-lens holding shaft is stopped as long as a preset value of the torque is exceeded.
- An apparatus for form-machining the peripheral edge of spectacle lenses (5) and for optionally applying a facet with a driven spectacle-lens holding shaft (2, 3) which holds the lens (5) and a machining tool (1) which is movable in controlled manner in relation to the spectacle-lens holding shaft (2, 3), a measuring device (9, 10, 11, 12, 13) for measuring the torque of the spectacle-lens holding shaft (2, 3) and a control device (14) for the force of the spectacle-lens machining tool (1) acting on the lens (5) by reducing the speed of rotation of the spectacle-lens holding shaft (2, 3), optionally until it stops, if and as long as the torque exceeds a preset, adjustable value.
- An apparatus according to Claim 5, in which the measuring device (9, 10, 11, 12, 13) for measuring the torque has an elastic support (10, 11) for the rotatably mounted housing of the drive motor (6) for the spectacle-lens holding shaft (2, 3).
- An apparatus according to Claim 6, in which a displacement pickup (12, 13) which co-operates with the control device (14) is located on the elastic support (10, 11) and the control device (14) effects a reduction in the speed of rotation of the spectacle-lens holding shaft (2, 3) or an increase in the distance between the machining tool (1) and the spectacle-lens holding shaft (2, 3) proportionally to the amount by which a measured path of the displacement pickup (12, 13) is exceeded.
- An apparatus according to Claim 6, in which the elastic support (10, 11) is pre-tensioned such that a movement occurs only when the preliminary tension, i.e. the preset torque, occurs, and in which an electrical contact co-operates with the elastic support which interrupts the supply of electricity to the drive motor (6) when the preliminary tension is exceeded.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914174A DE19914174A1 (en) | 1999-03-29 | 1999-03-29 | Method and device for shaping the peripheral edge of spectacle lenses |
| DE19914174 | 1999-03-29 | ||
| PCT/EP2000/002557 WO2000058052A2 (en) | 1999-03-29 | 2000-03-23 | Method and device for machining the peripheral edge of spectacle lenses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1173305A2 EP1173305A2 (en) | 2002-01-23 |
| EP1173305B1 true EP1173305B1 (en) | 2003-02-26 |
Family
ID=7902796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00920544A Expired - Lifetime EP1173305B1 (en) | 1999-03-29 | 2000-03-23 | Method and device for machining the peripheral edge of spectacle lenses |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6579155B1 (en) |
| EP (1) | EP1173305B1 (en) |
| DE (2) | DE19914174A1 (en) |
| WO (1) | WO2000058052A2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003300136A (en) * | 2002-04-08 | 2003-10-21 | Hoya Corp | Lens processing device |
| EP1445065A1 (en) * | 2003-02-05 | 2004-08-11 | Nidek Co., Ltd. | Eyeglass lens processing apparatus |
| DE10324146B4 (en) * | 2003-05-26 | 2008-08-14 | Weco Optik Gmbh | Method and device for shaping of spectacle lenses |
| US20050019955A1 (en) * | 2003-07-23 | 2005-01-27 | Dahl Jeremy E. | Luminescent heterodiamondoids as biological labels |
| JP4290673B2 (en) * | 2005-04-28 | 2009-07-08 | 株式会社ニデック | Glasses lens peripheral processing method |
| US7926730B2 (en) * | 2005-11-30 | 2011-04-19 | Pitney Bowes Inc. | Combined multi-spectral document markings |
| JP4975469B2 (en) * | 2007-02-02 | 2012-07-11 | 株式会社ニデック | Eyeglass lens processing equipment |
| JP5301823B2 (en) * | 2007-12-06 | 2013-09-25 | 株式会社ニデック | Eyeglass lens peripheral processing equipment |
| JPWO2015050186A1 (en) * | 2013-10-04 | 2017-03-09 | 株式会社フジミインコーポレーテッド | Polishing apparatus and polishing method |
| US9579737B1 (en) * | 2014-10-28 | 2017-02-28 | Myers Precision Grinding Company | Methods for threading a ceramic work piece with a grind wheel |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1356208A (en) * | 1972-02-14 | 1974-06-12 | Raphaels Ltd | Monowheel plastic lens edger |
| DE3744117A1 (en) * | 1987-12-24 | 1989-07-06 | Loh Kg Optikmaschf | DEVICE FOR CENTERING OPTICAL LENSES FOR MECHANICAL MOUNTING, IN PARTICULAR WHILE GRINDING AND FACETTING |
| DE4320934C2 (en) * | 1993-06-24 | 1995-04-20 | Wernicke & Co Gmbh | Spectacle lens edge grinding machine |
| JP3741477B2 (en) | 1996-03-18 | 2006-02-01 | 株式会社トプコン | Surveying system |
| JP4034842B2 (en) * | 1996-03-26 | 2008-01-16 | 株式会社ニデック | Lens grinding machine |
| JP4011134B2 (en) * | 1996-03-26 | 2007-11-21 | 株式会社ニデック | Lens grinding machine |
| DE19616536C2 (en) * | 1996-04-25 | 2000-01-27 | Wernicke & Co Gmbh | Process and eyeglass lens grinding machine for shaping the peripheral edge of eyeglass lenses and possibly for subsequent facet grinding |
| DE19632340C2 (en) * | 1996-08-10 | 2001-02-01 | Wernicke & Co Gmbh | Process for shape grinding of the peripheral edge of spectacle lenses and for subsequent facet grinding if necessary |
| JPH10138108A (en) | 1996-10-31 | 1998-05-26 | Nidek Co Ltd | Equipment and method for grinding spectacles lens |
| EP1938923B1 (en) | 1997-08-01 | 2012-06-13 | Nidek Co., Ltd. | Method of grinding eyeglass lens, and eyeglass lens grinding apparatus |
| JP3730410B2 (en) * | 1998-05-29 | 2006-01-05 | 株式会社ニデック | Eyeglass lens processing equipment |
| JP3730409B2 (en) * | 1998-05-29 | 2006-01-05 | 株式会社ニデック | Eyeglass lens processing equipment |
| JP2000015549A (en) * | 1998-06-30 | 2000-01-18 | Nidek Co Ltd | Spectacle lens machining device |
-
1999
- 1999-03-29 DE DE19914174A patent/DE19914174A1/en not_active Withdrawn
-
2000
- 2000-03-23 EP EP00920544A patent/EP1173305B1/en not_active Expired - Lifetime
- 2000-03-23 WO PCT/EP2000/002557 patent/WO2000058052A2/en active IP Right Grant
- 2000-03-23 US US09/937,549 patent/US6579155B1/en not_active Expired - Fee Related
- 2000-03-23 DE DE50001329T patent/DE50001329D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1173305A2 (en) | 2002-01-23 |
| WO2000058052A2 (en) | 2000-10-05 |
| DE50001329D1 (en) | 2003-04-03 |
| WO2000058052A3 (en) | 2001-06-14 |
| US6579155B1 (en) | 2003-06-17 |
| DE19914174A1 (en) | 2000-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1173305B1 (en) | Method and device for machining the peripheral edge of spectacle lenses | |
| DE4320934C2 (en) | Spectacle lens edge grinding machine | |
| DE3438238C2 (en) | ||
| DE69907565T2 (en) | Device for grinding eyeglass lenses | |
| DE1752002A1 (en) | Method and device for manufacturing lenses | |
| EP1100651B1 (en) | Grinding machine for edges of spectacles lenses | |
| DE19616536C2 (en) | Process and eyeglass lens grinding machine for shaping the peripheral edge of eyeglass lenses and possibly for subsequent facet grinding | |
| DE4409300A1 (en) | Device for processing rolls during the rolling process | |
| EP0988929B1 (en) | Polishing machine for spectacle lenses | |
| DE60211078T2 (en) | Centerless grinding process for rod-shaped workpiece on a centerless grinding machine | |
| DE19632340C2 (en) | Process for shape grinding of the peripheral edge of spectacle lenses and for subsequent facet grinding if necessary | |
| EP2852472B1 (en) | Method for grinding workpieces, in particular for centring grinding of workpieces such as optical lenses | |
| EP1226793A2 (en) | Method for determining the actual positional data of a tool and device therefor | |
| DE2527643A1 (en) | COPY PROCESSING MACHINE IN PARTICULAR FOR CREATING CONCAVER SURFACES | |
| EP0957188B1 (en) | Grinding of working elements of a carding machine | |
| EP0679472B1 (en) | Machine for grinding rollers | |
| DE10324146B4 (en) | Method and device for shaping of spectacle lenses | |
| DE19616572C2 (en) | Method and device for measuring a spectacle frame or a spectacle lens or a shaped pane | |
| DE3841829C2 (en) | ||
| DE19537692C2 (en) | Spectacle lens processing machine | |
| EP1693151A2 (en) | Eyeglass beveling machine | |
| DE2331256A1 (en) | METHOD AND DEVICE FOR EDGING NON-RIGID LENSES | |
| WO2001070461A1 (en) | Supplementary grinding tool for use in an edge grinding machine for spectacle lenses | |
| DE920346C (en) | Machine for grinding the edges of optical lenses | |
| EP0027219B1 (en) | Hand belt-grinding machine with a guiding frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| 17P | Request for examination filed |
Effective date: 20010922 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| 17Q | First examination report despatched |
Effective date: 20020617 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Designated state(s): DE FR GB IT |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 20030226 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030226 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 50001329 Country of ref document: DE Date of ref document: 20030403 Kind code of ref document: P |
|
| GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20030226 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20031127 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20060322 Year of fee payment: 7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070430 Year of fee payment: 8 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20071130 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070402 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081001 |