DE602004009374T2 - Device for processing spectacle lenses - Google Patents

Device for processing spectacle lenses Download PDF

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Publication number
DE602004009374T2
DE602004009374T2 DE200460009374 DE602004009374T DE602004009374T2 DE 602004009374 T2 DE602004009374 T2 DE 602004009374T2 DE 200460009374 DE200460009374 DE 200460009374 DE 602004009374 T DE602004009374 T DE 602004009374T DE 602004009374 T2 DE602004009374 T2 DE 602004009374T2
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Prior art keywords
grindstone
chamfering
rotation
lens
spectacle lens
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DE200460009374
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DE602004009374D1 (en
Inventor
Ryoji Shibata
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Nidek Co Ltd
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Nidek Co Ltd
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Priority to JP2003307761 priority Critical
Priority to JP2003307761A priority patent/JP4131842B2/en
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Publication of DE602004009374D1 publication Critical patent/DE602004009374D1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02Machines 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
    • B24B9/06Machines 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
    • B24B9/08Machines 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
    • B24B9/14Machines 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
    • B24B9/148Machines 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/0076Other grinding machines or devices grinding machines comprising two or more grinding tools

Description

  • The The present invention relates to a spectacle lens machining apparatus for processing the scope of spectacle lenses.
  • at the spectacle lens processing apparatus for processing the spectacle lens periphery for fitting the spectacle lens in the spectacle frame, the processing generally performed on the lens edge to form an inverted V-shaped chamfer, in a V-shaped Groove in the interior of the socket to be fitted. This chamfering is performed by a chamfering grindstone having a V-shaped chamfer groove having. The chamfering grindstone is in terms of wear usually cylindrical in similar Such as a pre-sharpened grindstone with a diameter of over 100 mm formed.
  • In recently, Due to the variety of design, eyewear frames have tight curves on. However, when using the bevel on the lens circumference cylindrical chamfering grindstone with a diameter of over 100 mm is formed to coincide with the strong frame curvature, superimpose the chamfering stone and the chamfer form each other and the chamfer gets thin (the chamfer width and chamfer height become smaller).
  • EP-A-1310326 discloses a spectacle lens machining apparatus according to the preamble of claim 1 and includes a rotation shaft parallel to the lens rotation shafts and a rotation shaft that can be tilted with respect to the lens rotation shafts. Coarse grinding stones and a fine grinding stone having a V-shaped chamfering groove for forming an inverted V-shaped chamfer on the periphery of the spectacle lens are arranged on the rotating shaft. A deburring grindstone for deburring the edge corners of the spectacle lens having a tapered surface in a conical shape and a grooved grindstone for forming a groove on the periphery of the spectacle lens are disposed on the rotating shaft.
  • EP-A-0857540 discloses a spectacle lens grinding apparatus having a plurality of rotational shafts parallel to the spectacle lens jig shafts. Each of the rotary shafts has a rough grinding wheel and a finishing grinding wheel.
  • SUMMARY OF THE INVENTION
  • Consequently It is an object of the present invention, such a spectacle lens processing device capable of providing the chamfer on the spectacle lens periphery form so that it coincides with the rounding in the spectacle frame.
  • According to the invention Problem solved by the features of the main claim. The under claims include preferred embodiments of the invention.
  • BRIEF DESCRIPTION OF THE DRAWING
  • 1 is a schematic external view of the spectacle lens processing apparatus according to the invention;
  • 2 Fig. 12 is a schematic view of the lens processing area;
  • 3 Fig. 12 is a schematic view of the lens processing area;
  • 4 is a schematic view of the carriage;
  • 5 is a schematic view of the second grinding area;
  • 6 is a schematic view of the survey area 2a the measuring unit 2 the spectacle frame shape;
  • 7 Fig. 12 is a schematic block diagram of the control system of the present apparatus; and
  • 8A and 8B FIG. 11 are views for explaining the method of obtaining the machining information of the small-diameter chamfering grindstone. FIG.
  • DETAILED DESCRIPTION THE PREFERRED EMBODIMENTS
  • An embodiment of the invention will be explained based on the attached drawings. 1 is a schematic view of the spectacle lens processing apparatus according to the invention. A main body 1 the device is equipped with a spectacle frame (target spectacle lens) measuring unit 2 connected. The main body 1 is with a display 415 to display the machining information and a control panel 420 equipped with different switches. The reference number 24 denotes a window opening for a processing room.
  • 2 and 3 Fig. 11 are schematic views of a lens working portion of the inside of the main body 1 is set up. 2 is a view from the top of the edit area 5 seen from. 3 is a view from the right page of the editing area 5 seen from. Incidentally, the main body 1 provided with a spectacle lens measuring unit, to the known units (described in US Re. 35.898 ( Japanese Patent Laid-Open No. 212661/1993 ), or EP 1310326 A1 ( Japanese Patent Laid-Open No. 2003-145400 )), and therefore the description thereof is omitted.
  • A sleigh 10 , a first grinding area 200 and a second grinding area 250 are on a basis 10 arranged. An eyeglass lens LE to be processed is provided by two spectacle lens rotation shafts 110L . 110R of the carriage area 100 clamped and held and is passed through the first and second grinding areas 200 and 250 subjected to a grinding (edging) on the circumference.
  • <first Grinding area>
  • The first grinding area 200 is on the front of the carriage area 100 arranged and includes a pre-sharpening grindstone 201 for glasses, a rough grinding stone 201b for plastics and a chamfering finishing grindstone 201c large diameter (a chamfer for chamfering and forming a flat edge) with a V-shaped chamfer groove 202a for chamfering (finishing) and a flat working surface 202b for forming a flat edge (finishing). The finishing grindstone 201c may be the chamfering grindstone, which merely has the chamfer groove 202a having. These whetstones 201 . 201b . 201c are coaxial (each of the axes of rotation is coaxial) on a grindstone rotating shaft 203 arranged (fastened). The wave 203 is on a spindle unit 205 rotatably mounted on the base 10 is attached, and is at its end with a motor 207 connected. The wave 203 is by driving the engine 207 turned to thereby the grindstones 201 . 201b . 201c to turn. Further, the grindstones 201 . 201b . 201c cylindrical and have a diameter of about 100 mm to extend the abrasion life. Incidentally, the grindstone 201c used when a course of the chamfer to be formed, a comparatively moderate curvature (if a curvature value Crv is less than 6) has.
  • <Slide>
  • The sledge area 100 includes a carriage base 101 running along two rail shafts 107 is movable, extending in the direction of the axis of rotation of the shaft 203 (hereinafter referred to as "X-axis direction") and on the base 10 are attached. A rack 103 that extends in the X-axis direction is at the rear of the carriage base 101 attached and with a pinion 104 are connected to a rotary shaft of a stepping motor 105 is mounted on the base 10 is attached. The rack 103 is by driving the engine 105 so moved that the carriage base 101 is moved in the X-axis direction.
  • The sled 112 , which has approximately a U-shape seen from the front, is on the carriage base 101 assembled. 4 is a schematic view of the carriage 112 seen from the front. The sled 112 is with an upwardly extending left arm 112L and right arm 112R provided, with the left arm 112L the wave 110L holds and the right arm 112R the wave 110R stops and both waves 110L . 110R rotatably and coaxially in the X-axis direction (each of the rotation axes is coaxial). The wave 110R is in the direction of the rotation axis (X-axis direction) by the motor 115 , on the right side of the sled 112 is attached, and by a movement mechanism 116 , such as B. one inside the right arm 112R Provided feed screw, movable, so that the lens LE from the waves 110L . 110R is clamped and held. In contrast, there is a wave 120 extending in the X-axis direction and in the carriage 112 is arranged with the rotary shaft of the motor 117 connected to the right side of the carriage 112 is attached. The wave 120 is with the wave 110L over a belt 121 and also with the wave 110R over a belt 122 connected. The wave 120 is by driving the engine 117 turned, so the waves 110L . 110R be rotated simultaneously (synchronously).
  • The sled base 101 is by two rail waves 131 attached, which is parallel in the direction of a change in a distance between the axis of rotation of the shaft 203 and the axes of rotation of the waves 110L . 110R In the present embodiment, the Y-axis direction inclines about 15 ° to this side (the front side) and the top of the carriage base 101 also tilts to this page (see 3 ). The sled 112 is in the Y-axis direction along the waves 131 movably arranged. The motor 135 is at a back of the sled base 101 attached and on its rotary shaft with a feed screw 133 connected, which extends in the Y-axis direction. The feed spindle 133 is by driving the engine 135 turned, so the sled 112 is moved in the Y-axis direction. What the engine 135 is concerned, a servo motor is used, which with an encoder 136 is provided for detecting the rotation. During machining, the torque (the motor load current) of the motor 135 captured and one the engine 135 supplied voltage is controlled on the basis of the detected results so that a processing pressure of the lens LE on the grindstone is regulated. The position information of the movement of the carriage 112 are detected on the basis of a signal supplied by the encoder 136 is issued, and the end of processing is judged.
  • <second Grinding area>
  • The second grinding area 250 is at the base 10 via a fastening element 201 attached to the inner part of the wagon area 100 to be positioned. 5 is a schematic view of the second grinding area 250 , The second grinding area 250 is with a motor 253 , an L-shaped support 257 that one with the engine 253 connected rotary shaft 255 rotatably supported and a grindstone rotary shaft 260 , a grinding area 270 and a drilling tool 280 provided that on the shaft 260 is arranged (fastened). The rotation of the shaft 255 by driving the engine 253 is about bevel gears 258 . 261 on the wave 260 transferred, so the grinding area 270 and the drilling tool 280 to be turned around.
  • The axis of rotation of the shaft 260 , the axes of rotation of the waves 110L . 110R and the axis of rotation of the shaft 203 are positioned at the same level 01 (see 3 ). The axis of rotation of the shaft 260 Tilts in relation to the axes of rotation of the waves 110L . 110R (X-axis direction) on the same plane 01 (see 5 ). The inclination angle α1 is preferably 5 to 15 degrees, and in the present embodiment, it is about 10 degrees.
  • The grinding area 270 is with a conically shaped chamfering grindstone 271 with a small diameter, which has a V-shaped chamfer groove 271a has a deburring grindstone 272 for a lens front, a deburring grindstone 273 for a lens back and a grooved grindstone. The grindstone 271 has a smaller diameter than the grindstone 201c , preferably less than half of the grindstone 201c on. Thereby, the chamfer can be prevented from becoming thin even if the course of the phase to be formed has a comparatively large curvature (if the curvature value CrV is more than 6). In the present embodiment, the diameter of the grindstone is 271 (the smallest diameter of the groove 271a ) about 30 mm. An angle (an angle with respect to the axis of rotation of the shaft 260 ) of a conically shaped machined surface (the working surfaces on both outer sides of the groove 271a ) of the grindstone 271 is the same as the inclination angle α1 of the shaft 260 , Therefore, the working surface of the grindstone is 271 parallel to the direction of the axes of rotation of the shafts 110L . 110R (X-axis direction) (see 5 ). The respective largest outer diameter of the grinding stones 272 . 273 lie on the extension of the working surface of the grindstone 271 , The largest outside diameter of the grindstone 274 lies slightly further inside than the extension of the working surface of the grindstone 271 , The drilling tool 280 is coaxial with the shaft 260 (The respective axes of rotation are coaxial) and is arranged at its end part.
  • Incidentally, it is sufficient that the shaft 260 is not inclined and parallel to the direction of the axes of rotation of the waves 110L . 110R (X-axis direction), but to prevent the chamfer from becoming thin, that is, when the curvature of the chamfered course is stronger, the shaft becomes 62 preferably inclined.
  • The sled 112 is movable in the Y-axis direction to the lens LE, that of the waves 110L . 110R is held clamped to the grinding area 270 and the distance between the axes of rotation of the shafts 110L . 110R the axis of rotation of the shaft 203 is changed by the drive of the engine 135 is regulated.
  • 6 is a schematic view of a survey area 2a the spectacle frame measuring unit 2 , The measuring unit 2a comprising: a first horizontally movable base 21 , a second base 22 that by a stepper motor 30 to be turned on the first base 21 is attached; holding plates 35a . 35b perpendicular to the second base 22 are provided; a movable block 37 that along two waves 36a . 36b is movable on the holding plates 35a . 35b are attached and extend parallel to each other; a measuring shaft 23 passing through the moving block 37 runs and is rotatable and vertically movable; a measuring head 24 , at the top of the measuring shaft 23 is provided; an arm 41 , which rotates at the lower end of the fair shaft 23 mounted and attached to a pen 42 fixed vertically from the moving block 37 extends; a shielding plate 25 at the front end of the arm 41 provided and with a vertical slot 26 and a slot 27 is formed, with respect to the vertical slot 26 inclined by 45 degrees; a pair of light emitting diodes 28 and a linear image sensor 29 that on the second base 22 are provided while the protective plate 25 held in between; and a spring 43 with a constant torque acting on a drum 44 attached, which is rotatable on the second base 23 is stored and the movable block 37 constantly to the front end side of the measuring head 24 draws.
  • With the surveying area constructed in this way 2a the shape of the spectacle frame is measured as described below. First, the socket is held and attached to a socket holding portion (not shown, see FIG US Re. 35.898 ) and the measuring head 24 is at the front end with the internal groove of the socket brought into contact. After that, the engine becomes 30 each rotated by an impulse or step number of a given unit rotation. Here, the measuring shaft moves 23 integral with the measuring head 24 along the waves 36a . 36b , following the curvature of the socket. According to their movement, protective plate moves 25 vertically and laterally between the light emitting diode 28 and the linear image sensor 29 and cuts off the light from the LED. The light coming through the slits 26 . 27 passes through, in the protective plate 25 are formed, reaches a light receiving part of the linear image sensor 29 and its amount of movement is read out. The amount of movement is read out such that the position of the slot 26 represents the radius vector r of the socket, and the difference in difference between the slot 26 and the slot 27 is read out as a height z of the socket. By measuring N points in this way, the shapes of the versions are expressed as (rn, θn, zn) (n 0 1, 2, ... N) (for details, see U.S. Patent No. 5,138,770 (the one revealed Japanese Patent No. 1058647/1002 )).
  • For the device having the above-described construction, its operation will be described with reference to a schematic block diagram of the control system in FIG 7 described. First, the version form becomes the unit 2 measured. The data (rn, θn, zn) of the frame form are input and stored in the data memory 451 by pressing a switch 421 of the control panel area 420 saved. The target spectacle lens shape based on the frame shape data 310 will be on display 415 and the processing conditions can now be set or entered. An operator gives the processing conditions, such. For example, a layout data including the PD value and FPD value of a spectacle wearer and the height of an optical center, the material of the spectacle lens to be processed, the processing mode, and the like. Assuming that the eyeglass lens LE is processed to coincide with the socket having a large curvature, the editing mode hereby becomes the mode switch 422 set to a bevel print mode. When the machining condition is entered, the lens LE is clamped and shafts 110L . 110R held and the start switch 423 is pressed to set the device in motion.
  • The control / regulation device 450 activates the spectacle lens shape measuring range 500 by a start signal, and measures a position of an edge of the lens LE corresponding to the frame shape data and the layout data. Thereafter, the controller performs 450 a chamfering calculation to obtain a vertex shape of the phase to be formed on the periphery of the lens LE on the basis of the edge position information according to a predetermined program. The bevel apex is one of the methods to represent the bevel shape data. For example, the chamfer calculation at this stage divides the lens edge thickness by a predetermined ratio (eg, 3: 7 from the front surface of the lens) and positions the chamfer apexes over the entire radius vector perimeter.
  • When the chamfer calculation is finished, the screen of the display switches 415 , as in 7 shown on a simulation screen in which the bevel shape can be changed. An approximate curvature value (a groove curvature) obtained from the bevel vertex development obtained by the above-mentioned land calculation becomes one position 301 An approximate value of curvature (a spectacle frame curvature) determined by the unit 2 measured eyeglass frame, will be on the position 302 "FC" is displayed 303 "Position" is a position for inputting an offset amount of the movement of the bevel-vertex course parallel to the front or rear surface of the spectacle lens 304 "Tilt" is a position for entering the data for tilting the bevel vertex curve.
  • The value of the position 301 For example, "curvature" is obtained as follows: From any four points in the course of the bevel-vertex curve obtained by the bevel calculation, it is assumed that the four points on the spherical surface have the same centers (a, b, c ) and the radius r.
  • A Equation of the sphere surface reads
  • Equation 1
    • (x - a) 2  + (y - b) 2  + (z - c) 2  = r 2
  • By Substitute any four points of the chamfer vertex position into this equation, the centers (a, b, c) or the radius r the spherical surface get through the four points. This calculation will carried out, to form several pairs (4 or 5 pairs) from the calculation, to get an average. The curvature value CrV usually expresses the lens curvature at the lens and is obtained by the following equation.
  • Equation 2
    • CrV = (n-1) / r
  • In this equation, n denotes the bre index and is generally set at 1.523. The curvature value of the eyeglass frame (the eyeglass detection curvature) of the position 302 is obtained in the same way.
  • In this case, if the difference between the bevel curvature and the eyeglass detection curvature is too large, the eyeglass lens can not be fitted in the eyeglass frame, and in such a case, the bevel curvature is adjusted to coincide with the eyeglass detection curvature with respect to the position 302 match the curvature value displayed. The adjustment is carried out as follows. A marker cursor 300 (an inverted display) by pressing two switches 425 is displayed on the position 301 and the curvature value is set by pressing the switch 430a and 430b changed to a desired value. To move the chamfer vertex position in parallel, the marker cursor becomes 300 to the position 303 and the offset value entered. The control / regulation device 450 On the basis of the changed input data, obtains a coordinate of a center of the spherical surface on which the bevel vertex is located at the position of the minimum lens edge thickness, and recalculates the bevel vertex position based on the radius of the bevel the coordinate of the center and the curvature value was obtained.
  • Incidentally, a spectacle lens shape target based on the spectacle frame shape data becomes 310 , a mark 311 showing the position of the minimum lens edge thickness, the mark 312 showing the position of the maximum lens edge thickness, and a rotary cursor 313 indicative of the radius vector position to the chamfering condition in a chamfer cross section display area 320 displayed on the simulation screen. By changing the position of the rotary cursor 313 through the switch on the control panel 420 The operator may confirm the scheduled beveling condition after the entire circumference has been processed.
  • The operator dials through the switch 427 The chamfer grindstone used at the time of chamfering is based on whether at the position 301 set bevel curvature is strong or moderate. If the curvature value CrV of the chamfer is more than 6 (strong), the grindstone becomes 271 is selected, and if the curvature value CrV of the chamfer is lower than 6 (moderate), the grindstone becomes 201c selected. The selection information will be on the position 330 on the display 415 displayed. If the grindstone 271 is selected, "Small" is displayed and if the grindstone 201c is selected, "Large" is displayed.
  • The control / regulation device 450 Receives the machining information for chamfering in response to the selection of chamfering grindstone. The calculation of the machining information will be explained. First, in the case of the cylindrical grindstone 201c the editing information is obtained as follows. It is assumed that the radius vector information of the bevel vertex curve is (En, θn) (n = 1, 2, ... N). En is the radius vector length (radius) and θn is the radius vector angle. It is also assumed that the radius of the groove 202a in the grindstone 201c Rb is. Here, the distance Lb from axis to axis between the center of rotation (the axis of rotation) of the grindstone 201c and the processing center (the rotation axis) of the lens LE (the distance between the rotation axis of the shaft 203 and the axes of rotation of the waves 110L . 110R ) by the following equation.
  • Equation 3
    • Lb = En · cosθn + (Rb 2  - En 2 * sin 2 θn) ½  (n = 1, 2, 3, ... N)
  • in this connection becomes the radius vector information (En, θn) around the machining center rotated by a tiny arbitrary angle unit and the respective Maximum value requested by Lb. It is assumed that this angle of rotation ξi (i = 1, 2, 3, ... N). The maximum value of Lb at the respective ξi is included Lbi assumed and θn is assumed to be the maximum value of Lb with Θi at this time. When performing the calculation over the entire circumference becomes the machining information in the direction the distance from axis to axis (Y-axis direction) as (ξi, Lbi, Θi) (i = 1, 2, 3, ... N).
  • Because in the case of the grindstone 271 the wave 260 not parallel to the waves 110L . 110R lies when the grindstone shape from the direction of the axes of rotation 110L . 110R is considered, she is like in 8A shown, oval. If the radius of the groove 271a in the grindstone 271 is assumed to be Rs, the distance Ls becomes axis-to-axis between the rotation center (the rotation axis) of the grindstone 271 and the rotation center (the rotation axis) of the lens LE (the distance between the rotation axis of the shaft 260 and the axes of rotation of the waves 110L . 110R ) are obtained by the following equation.
  • Equation 4
    • Ls = En * cosθn + (Rs 2  - En 2  sin 2 θn) ½ · Cosα (n = 1, 2, 3, ... N)
  • In the same manner as explained above, the maximum value Ls is obtained when the radius vector information (En, θn) is added to the processing is rotated about a tiny arbitrary angle unit. This rotation angle is assumed to be ξi (i = 1, 2, 3, ... N), the maximum value of Ls at the corresponding ξi is assumed to be Lsi and θn at the time of the maximum value with Θi. When performing the calculation over the entire circumference, the machining information in the direction of the distance from axis to axis (Y-axis direction) is obtained as (ξi, Lbi, Θi) (i = 1, 2, 3, ... N).
  • Because the wave 260 inclined, if, as in 8B is viewed from the side of the lens LE, it is oval. When using the grindstone 271 Therefore, the direction of the axial axes of rotation of the waves must 110L . 110R (X-axis direction) are corrected. The attitude change amount Xs in the X-axis direction is obtained by the following equation.
  • Equation 5
    • Xs = sinα * (Rs-Rs 2  - En 2 * sin 2 θn) ½ ) (n = 1, 2, 3, ... N)
  • On the same way as explained above the radius vector information (En, θn) about the machining center rotated by a tiny arbitrary angle unit and the respective Maximum value of Xs received, this as correction information in the X-axis direction (ξi, Lbi, Θi) (i = 1, 2, 3, ... N) is obtained.
  • After the chamfering condition passes through the chamfer cross section display area 320 has been confirmed, the start switch 423 pressed to start editing if there is no problem. The control / regulation device 450 controls / regulates the function of the carriage area 100 according to a processing sequence and executes the processing. If the material of the lens LE is plastic, the carriage base becomes 101 by a drive control of the motor 105 moved in the X-axis direction, so that the clamped and held spectacle lens LE on the grindstone 201b is positioned. After that, the sled base becomes 112 in the Y-axis direction by drive control of the motor 135 moves, so that on the circumference of the lens Le a pre-grinding is performed.
  • After completion of the pre-grinding, the processing is switched to chamfering. If the grindstone 271 was selected, the rotation of the engine 207 stopped and the engine 253 set in rotation and the slide base 101 is moved to the X-axis direction, so that the lens LE at the groove 271a of the grindstone 271 is positioned. Then the sled 112 moving in the Y-axis direction and the carriage on the basis of the machining information (ξi, Lbi, Θi) 112 is moved on the basis of the bevel vertex history data and the correction information (ξi, Lbi, Θi) with respect to the X direction, and while the lens LE is being rotated, the circumference of the lens LE becomes the grindstone 271 pressed to perform chamfering. With such use of the conical grindstone 271 For example, it is possible to carry out the operation even if the bevel curvature is strong while preventing the chamfer from becoming thin.
  • Incidentally, the control device controls / regulates 450 during the time of machining, the contact pressure of the lens LE with respect to the grindstone is based on the detection of the torque of the motor and controls the movement position in the Y-axis direction of the carriage 112 based on one from the encoder 136 output signal and judges the end of the processing.
  • If the grindstone 201c is selected, the spectacle lens LE after completion of the pre-sharpening of the groove 202a of the grindstone 201c positioned and the sled 112 on the basis of the machining information (ξi, Lbi, Θi) moves in the Y direction with respect to the Y direction while the carriage 112 is moved in the X-axis direction on the basis of the bevel vertex curve data to the chamfering operation by pressing the periphery of the lens LE to the grindstone 201c perform. If all chamfering is just with the conical grindstone 271 is made, the chamfer becomes thin due to obstruction, in contrast, if the bevel curvature is moderate. Therefore, if the bevel curvature is moderate, the operation can be performed by preventing the chamfer from using the cylindrical grindstone 201c gets thin.
  • Although in the above description, the chamfer grindstone is operated by the operator by pressing the switch 427 is selected, the control / regulation device 450 be configured to perform a determination based on the curvature value (this is one of the methods that indicate the bevel shape data). That is, similar to the above method, the whetstone 201c is determined for use when the bevel curvature value CrV is less than 6, and when the bevel curvature value CrV is greater than 6, the grindstone 271 is determined for use. As for the rest, the control / regulation in which the control / regulation device 450 automatically determines the chamfering grindstone on the basis of the chamfering curvature values at the time of processing right and left lenses, when one curvature value CrV is larger than 6 and the other curvature value CrV is smaller than 6, it is sufficient for the later processing To use whetstone, the was used during the initial processing.
  • In the present device, the shaft 260 with the deburring grindstone 272 . 273 , the grooving whetstone 274 and the drilling tool 280 equipped. Therefore, the present device can also be used for deburring the spectacle lens LE, for grooving and drilling.
  • If through the switch of the control panel 420 the deburring has been selected controls the control / regulation device 450 the sled 112 to move in the X and Y axis directions based on the separately obtained de-burring data. For deburring the front surface of the grindstone 272 controlled to contact the front edge of the lens LE, while for deburring the lens back surface of the grindstone 273 is controlled to contact the rear edge of the lens LE.
  • If the machining mode is set to the grooving mode, the controller controls 450 after pre-grinding and forming a flat edge of the carriage 112 to move in the X and Y axis directions based on the separately obtained fillet data and the grindstone 274 is pressed on the periphery of the lens LE to perform the groove. The groove data can basically be obtained in the same way from the machining information of the grindstone 271 to be obtained.
  • If the edit mode is set to the drilling mode, the bore position data is obtained using the switch of the operation panel 420 entered. The hole position data is given, for example, in the length and angle of the radius vector with respect to the center of rotation of the lens. The control / regulation device 450 converts the hole position data into the data of the X and Y directions and the lens rotation angle and positions the front end of the drilling tool 280 at the bore position of the front surface of the spectacle lens. After that, the sled 112 controlled to move in the X and Y directions, so that the lens LE to the inclination angle α of the shaft 260 is moved.
  • The second grinding area 250 was in the above embodiment in the arrangement in the first grinding area 200 in terms of the wave 110L . 110R Described opposite direction and such an arrangement structure is also applicable. That is, when the first grinding area 200 is used is the second grinding area 250 at a retracted position, and when the second grinding area 250 he is used between the waves 110L . 110R and the first grinding area 200 emotional.
  • In addition, by providing a third chamfer grindstone having a mean diameter between the diameter of the chamfering grindstone 271 with a small diameter and the diameter of the chamfering grindstone 271 is set with large diameter, it is possible to prevent the chamfer from becoming thin with respect to an average radius curvature of the curvature value CrV of 4 to 6. In this case it is at the in 2 and 3 shown arrangements sufficient to move the third chamfer grindstone from the retracted position to the insertion position.

Claims (6)

  1. Spectacle lens processing device ( 1 ) for processing a circumference of a spectacle lens (LE) to be fitted in a spectacle frame, comprising: a lens rotation device, the spectacle lens rotation shafts (FIG. 110L . 110R ) to hold the spectacle lens; and a first grinding device comprising a first grindstone rotating shaft ( 203 ) coaxial with a rough-ground grindstone ( 201 . 201b ), and a first chamfering grindstone ( 201c ) with a first chamfer groove ( 202a ) to form a chamfer on the circumference of the spectacle lens; a mode setting device ( 422 to set a chamfering mode; and a second grinder that has a second grindstone rotation shaft ( 260 ) provided with a second chamfering grindstone ( 271 wherein the second chamfering grindstone has a smaller diameter than that of the first chamfering grindstone, wherein a rotation axis of the second grindstone rotation shaft inclines with respect to a rotation axis of the lens rotation shaft; characterized in that the second chamfering grindstone has a second chamfering groove ( 271a ) to make a chamfer on the circumference of the spectacle lens and to work the surfaces on both outer sides of the second chamfering groove; and selecting means including determining means for determining the use of either the first chamfering grindstone or the second chamfering chamfer stone based on the set chamfering shape.
  2. A spectacle lens processing device according to claim 1, wherein the diameter of the second chamfering grindstone less than half of that of the first chamfering grindstone.
  3. Spectacle lens processing device after claim 1 or 2, wherein the second chamfering grindstone is a conically shaped whetstone.
  4. A spectacle lens processing device according to claim 3, the working surfaces on the second chamfering grindstone lie parallel to the axis of rotation of the lens rotating shaft.
  5. Spectacle lens processing apparatus according to one of claims 1 to 5, wherein the lens rotation shaft, the first grindstone rotation shaft and the second grindstone rotation shaft are arranged so that the respective axes of rotation lie on the same plane and the lens rotating shaft disposed between the first and the second grindstone rotation shaft is, and the lens processing apparatus further comprises a movement means for Movement of the spectacle lens rotating shaft in a direction to change a distance between the axes of rotation with respect to the respective having first and second grindstone rotary shafts.
  6. A spectacle lens machining apparatus according to any one of claims 1 to 5, wherein said second grindstone rotation shaft is coupled to at least one of a chamfering grindstone ( 272 . 273 ), a groove whetstone ( 274 ) or a drilling tool ( 280 ) is arranged coaxially.
DE200460009374 2003-08-29 2004-08-27 Device for processing spectacle lenses Active DE602004009374T2 (en)

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JP4368693B2 (en) * 2004-01-29 2009-11-18 株式会社トプコン Lens grinding method and apparatus
ES2217985B1 (en) * 2004-04-20 2005-12-01 Indo Internacional S.A. Numerical control drill for drilling a glass lens and corresponding procedure.
JP4873878B2 (en) * 2005-03-31 2012-02-08 株式会社ニデック Eyeglass lens peripheral processing equipment
FR2893524B1 (en) * 2005-11-24 2009-05-22 Essilor Int METHOD AND APPARATUS FOR DISRUPTING AN OPHTHALMIC LENS FOR MACHINING THE LENS OF THE LENS FOLLOWING A WANTED CURVE
JP2007181889A (en) 2006-01-05 2007-07-19 Nidek Co Ltd Glass lens working system
JP4800784B2 (en) * 2006-02-14 2011-10-26 Hoya株式会社 Spectacle lens processing apparatus and spectacle lens
FR2900854B1 (en) * 2006-05-10 2009-07-17 Essilor Int Method and device for sourceing a lens by cutting the lens
JP2007319984A (en) 2006-05-31 2007-12-13 Nidek Co Ltd Device for machining peripheral edge of eyeglass lens
FR2904703B1 (en) * 2006-08-04 2008-12-12 Essilor Int Pair of ophthalmic glasses and method of forming a peripheral rib of emboitement on the singing of a lens
US7848843B2 (en) 2007-03-28 2010-12-07 Nidek Co., Ltd. Eyeglass lens processing apparatus and lens fixing cup
JP5073345B2 (en) * 2007-03-30 2012-11-14 株式会社ニデック Eyeglass lens processing equipment
JP5405720B2 (en) * 2007-03-30 2014-02-05 株式会社ニデック Eyeglass lens processing equipment
FR2921285B1 (en) * 2007-09-24 2010-02-12 Essilor Int Detourage recovery device and method of distressing an ophthalmic lens
JP5134346B2 (en) 2007-11-30 2013-01-30 株式会社ニデック Eyeglass lens peripheral processing equipment
JP5372628B2 (en) 2009-07-08 2013-12-18 株式会社ニデック Eyeglass lens processing apparatus and beveling tool used in the apparatus
JP5935407B2 (en) * 2012-03-09 2016-06-15 株式会社ニデック Eyeglass lens processing equipment
JP6197260B2 (en) * 2013-08-07 2017-09-20 波田野 義行 Eyeglass lens processing equipment
JP6388416B2 (en) * 2017-05-04 2018-09-12 波田野 義行 Eyeglass lens processing equipment

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JP2582788B2 (en) * 1987-07-02 1997-02-19 株式会社トプコン Gazuri machine
JP3667483B2 (en) * 1997-02-10 2005-07-06 株式会社ニデック Lens grinding machine
JP3602303B2 (en) * 1997-08-01 2004-12-15 株式会社ニデック Eyeglass lens grinding machine
JP3892182B2 (en) * 1998-10-06 2007-03-14 Hoya株式会社 End face processing method of eyeglass lens
JP3895075B2 (en) * 1999-08-06 2007-03-22 Hoya株式会社 Lens holder
JP2001212740A (en) * 2000-02-02 2001-08-07 Grand Seiko Kk Spectacle lens machining method and its device
JP3942802B2 (en) * 2000-04-28 2007-07-11 株式会社ニデック Eyeglass lens processing equipment
JP2003145400A (en) * 2001-11-08 2003-05-20 Nidek Co Ltd Spectacle lens machining device
JP4271418B2 (en) * 2002-08-16 2009-06-03 株式会社トプコン Eyeglass lens grinding machine

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DE602004009374D1 (en) 2007-11-22
JP4131842B2 (en) 2008-08-13
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ES2294413T3 (en) 2008-04-01
EP1510290A1 (en) 2005-03-02
EP1510290B1 (en) 2007-10-10

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