JP5578549B2 - Eyeglass lens processing equipment - Google Patents

Description

  The present invention relates to a spectacle lens processing apparatus that processes the peripheral edge of a spectacle lens with a processing tool.

  The spectacle lens processing apparatus includes a lens chuck shaft that holds the spectacle lens, a lens rotating unit that rotates the lens chuck shaft, a finishing tool such as a bevel finishing grindstone that finishes the peripheral edge of the spectacle lens, and the lens chuck shaft and finish. A moving unit that moves relative to the rotation axis of the processing tool, and a data input unit that inputs processing condition data such as target lens data, and finishes the lens periphery based on the input target lens data. To process. At the time of manufacture and installation of the processing apparatus, calibration of the finished outer diameter size of the lens and the rotation angle of the lens is performed by a worker according to a predetermined procedure, and the calibration data is stored in the memory (for example, refer to cited document 1). . When processing the periphery of the lens, the periphery of the lens is processed based on the input target lens shape and calibration data.

Japanese Patent Laid-Open No. 2006-239782

  If the processing device is used for a long period of time, the outer diameter size of the lens finally finished will change due to wear of the processing tool, or the lens will rotate due to the displacement of the positional relationship between the lens chuck shaft and the processing tool. The corner or bevel position may change. In this case, it is necessary to perform calibration again to obtain adjustment data such as the outer diameter size. Conventionally, however, the necessity of calibration is required when the operator puts the actually processed lens into the lens frame of the spectacle frame. I noticed for the first time. In addition, when calibrating a processing apparatus installed in an eyeglass store, an operator prepares a dedicated calibration lens in addition to the actual processing lens, and uses the reference lens shape of a fixed shape stored in the memory to mount the calibration lens. After processing and obtaining adjustment data using a measuring instrument such as a caliper, the adjustment parameters were changed manually. In this case, it takes time for adjustment work, and it is necessary to prepare a lens for calibration separately, resulting in extra costs.

  This invention makes it a technical subject to provide the spectacle lens processing apparatus which can ensure the processing precision of a lens, without taking the labor of a calibration work of an operator, and extra cost.

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) Lens rotating means for rotating a lens chuck shaft for holding a spectacle lens, a finishing tool for finishing a peripheral edge of the spectacle lens, a processing tool rotating shaft to which the finishing tool is attached, and the lens chuck shaft Moving means, data input means for inputting target lens data, and storage means for storing calibration data for lens processing by the finishing tool in advance. A lens outer diameter for detecting an outer diameter shape of a lens in a spectacle lens processing apparatus that processes a peripheral edge of a lens with the finishing tool based on a mold (hereinafter referred to as an input lens shape) and calibration data stored in the storage means Detection means, calibration mode switching means for switching from a normal lens processing mode to an automatic calibration mode for obtaining lens processing calibration data, and an automatic calibration mode. When the lens is switched to a position, a calibration lens having a size larger than the input lens is determined based on the input lens prior to processing based on the input lens of the lens held on the lens chuck shaft. After the lens is determined by driving the lens rotating means and the moving means based on the determined calibration lens shape, the lens outer diameter detecting means is operated and detected. Calibration data acquisition means for obtaining new calibration data by comparing the outer diameter shape of the lens and the calibration target lens, and calibration data stored in the storage means are newly obtained by the calibration data acquisition means a machining control means for rewriting the calibration data, for the processed lens on the basis of the calibration target lens shape, subsequently newly stored calibration de on the input target lens shape and the storage means Characterized in that and a processing control means for processing by driving the lens rotating means and the moving means based on the data.
(2) In the eyeglass lens processing apparatus according to (1), the calibration lens shape determining means has a larger size than the input lens shape and includes a circular portion having the same radius around the center of the chuck of the lens. The calibration data acquisition means obtains calibration data of the outer diameter size based on the circular portion of the calibration target lens and the lens outer diameter of the circular portion detected by the lens outer diameter detection means. Features.
(3) In the eyeglass lens processing apparatus according to (2), the calibration lens shape determining means further determines the calibration lens shape so as to include a linear portion having a predetermined size and larger than the input lens shape. The calibration data acquisition means obtains calibration data of the rotation angle of the lens based on the direction of the straight line portion detected by the lens outer diameter detection means and the direction of the straight line portion of the calibration target lens. Features.

  According to the present invention, the processing accuracy of the lens can be ensured without the labor and extra cost of the operator's calibration work.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an eyeglass lens processing apparatus.

  On the base 170 of the processing apparatus 1, a carriage 101 is mounted that rotatably holds the pair of lens chuck shafts 102L and 102R. The peripheral edge of the spectacle lens LE sandwiched between the chuck shafts 102L and 102R is processed by being pressed against each grindstone of a grindstone group 168 as a working tool attached coaxially to a spindle (processing tool rotating shaft) 161a.

  The grindstone group 168 includes a rough grindstone 162, a finish whetstone 163 having a front bevel forming surface for forming a front bevel and a rear bevel forming surface for forming a rear bevel, and a bevel forming V used for a low curve lens. It comprises a finishing grindstone 164 having a groove and a flat surface, and a mirror surface grindstone 165 having a V-groove for forming a bevel and a flat surface. The grindstone spindle 161 a is rotated by a motor 160. These constitute a grindstone rotating unit. A cutter may be used as the roughing tool and the finishing tool.

  The lens chuck shaft 102R is moved to the lens chuck shaft 102L side by a motor 110 attached to the right arm 101R of the carriage 101. The lens chuck shafts 102R and 102L are rotated synchronously by a motor 120 attached to the left arm 101L via a rotation transmission mechanism such as a gear. An encoder 121 that detects the rotation angle of the lens chuck shafts 102 </ b> R and 102 </ b> L is attached to the rotation shaft of the motor 120. These constitute a chuck shaft rotating unit.

  The carriage 101 is mounted on a support base 140 that can move along shafts 103 and 104 extending in the X-axis direction, and is moved in the X-axis direction (the axial direction of the chuck shaft) by driving a motor 145. An encoder 146 that detects the movement position of the carriage 101 (that is, the chuck shafts 102R and 102L) in the X-axis direction is attached to the rotation shaft of the motor 145. These constitute the X-axis direction moving unit. Further, shafts 156 and 157 extending in the Y-axis direction (the direction in which the distance between the chuck shafts 102L and 102R and the grindstone spindle 161a is changed) are fixed to the support base 140. The carriage 101 is mounted on the support base 140 so as to be movable in the Y-axis direction along the shafts 156 and 157. A Y-axis moving motor 150 is fixed to the support base 140. The rotation of the motor 150 is transmitted to a ball screw 155 extending in the Y axis direction, and the carriage 101 is moved in the Y axis direction by the rotation of the ball screw 155. An encoder 158 that detects the movement position of the chuck shaft in the Y-axis direction is attached to the rotation shaft of the motor 150. Thus, a Y-axis direction moving unit (interaxial distance variation unit) is configured.

  In FIG. 1, lens edge position detection units 300 </ b> F and 300 </ b> R are provided on the left and right above the carriage 101. FIG. 2 is a schematic configuration diagram of a detection unit 300F that detects the edge position of the lens front surface (edge position of the lens front surface side on the target lens shape).

  A support base 301F is fixed to a block 300a fixed on the base 170. On the support base 301F, a tracing stylus arm 304F is slidably held in the X-axis direction via a slide base 310F. An L-shaped hand 305F is fixed to the tip of the probe arm 304F, and a probe 306F is fixed to the tip of the hand 305F. The measuring element 306F is in contact with the front surface of the lens LE. A rack 311F is fixed to the lower end portion of the slide base 310F. The rack 311F meshes with the pinion 312F of the encoder 313F fixed to the support base 301F side. The rotation of the motor 316F is transmitted to the rack 311F via a rotation transmission mechanism such as gears 315F and 314F, and the slide base 310F is moved in the X-axis direction. By driving the motor 316F, the measuring element 306F placed at the retracted position is moved to the lens LE side, and a measuring pressure for pressing the measuring element 306F against the lens LE is applied. At the time of detecting the front position of the lens LE, the lens chuck shafts 102L and 102R are moved in the Y-axis direction while the lens LE is rotated based on the target lens shape, and the edge position (the target lens shape) in the X-axis direction on the front surface of the lens by the encoder 313F. The edge position on the front side of the upper lens) is detected.

  Since the configuration of the edge position detection unit 300R on the rear surface of the lens is bilaterally symmetrical with the detection unit 300F, “F” at the end of the reference numeral attached to each component of the detection unit 300F illustrated in FIG. The description is omitted.

  In FIG. 1, a chamfering unit 200 is disposed on the front side of the apparatus main body, and a drilling / grooving unit 400 is disposed behind the carriage unit 100. Since these well-known structures are used, the details are omitted.

  In FIG. 1, a lens outer diameter detection unit 500 is disposed on the upper rear side on the lens chuck shaft 102R side. FIG. 3A is a schematic configuration diagram of the lens outer diameter detection unit 500. FIG. 3B is a front view of the probe 520 that the unit 500 has.

  A cylindrical measuring element 520 that is in contact with the edge of the lens LE is fixed to one end of the arm 501, and a rotating shaft 502 is fixed to the other end of the arm 501. The central axis 520a of the measuring element 520 and the central axis 502a of the rotating shaft 502 are arranged in a positional relationship parallel to the lens chuck shafts 102L and 102R (X-axis direction). The rotation shaft 502 is held by the holding portion 503 so as to be rotatable about the center axis 502a. The holding unit 503 is fixed to the block 300a in FIG. A fan-shaped gear 505 is fixed to the rotating shaft 502, and the gear 505 is rotated by the motor 510. A pinion gear 512 that meshes with the gear 505 is attached to the rotation shaft of the motor 510. An encoder 511 as a detector is attached to the rotation shaft of the motor 510.

  The probe 520 includes a cylindrical portion 521a that is contacted when measuring the outer diameter size of the lens LE, and a small-diameter cylindrical portion 521b that includes a V groove 521v that is used when measuring the position of the bevel formed in the lens LE in the X-axis direction. And a protrusion 521c used when measuring the position of the groove formed in the lens. The opening angle vα of the V groove 521v and the opening angle of the bevel forming V groove of the finishing grindstone 164 are the same as or wider than that. Further, the depth vd of the V groove 521v is formed shallower than the V groove of the finishing grindstone 164. Thereby, the bevel formed in the lens LE by the V groove of the finishing grindstone 164 is inserted into the center of the V groove 521v without interfering with other portions.

  The lens outer diameter detection unit 500 is used to detect whether or not the outer diameter of the unprocessed lens LE is sufficient for the target lens shape when processing the peripheral edge of the normal spectacle lens LE. At the time of measuring the outer diameter of the lens LE, as shown in FIG. 4, the lens chuck shafts 102L and 102R are at predetermined measurement positions (on the movement locus 530 of the central axis 520a of the probe 520 rotated about the rotation axis 502). Moved to. When the arm 501 is rotated by the motor 510 in the direction (Z-axis direction) perpendicular to the X-axis and Y-axis of the processing apparatus 1, the probe 520 placed at the retracted position is moved to the lens LE side and measured. The cylindrical portion 521a of the child 520 is brought into contact with the edge (periphery) of the lens LE. In addition, a predetermined measurement pressure is applied to the probe 520 by the motor 510. The lens LE is rotated every predetermined minute angle step, and the movement of the probe 520 at this time is detected by the encoder 511, whereby the outer diameter size of the lens LE with respect to the chuck center is measured.

  The lens outer diameter detection unit 500 includes the rotation mechanism of the arm 501 as described above, and a mechanism that linearly moves in a direction (Z-axis direction) orthogonal to the X axis and the Y axis of the processing apparatus 1. It may be.

  FIG. 5 is a control block diagram of the eyeglass lens processing apparatus. The motors, lens edge position detection units 300F and 300R, and lens outer diameter detection unit 500 shown in FIG. 1 are connected to the control unit 50. Also connected to the control unit 50 are a display 5 having a touch panel function for data input of processing conditions, a switch unit 7 provided with a processing start switch, a memory 51, a spectacle frame shape measuring device (not shown), and the like. Has been. The memory 51 stores calibration data as adjustment data such as the outer diameter size, lens rotation angle, and bevel position in lens processing.

  Next, the operation of the eyeglass lens processing apparatus having the above configuration will be described. First, a normal processing operation of a lens based on input data of processing conditions such as target lens data will be briefly described. The target lens shape data obtained based on the shape of the rim (lens frame) measured by the spectacle frame shape measuring unit 2 is input by pressing a data transfer switch arranged in the switch unit 7 and stored in the memory 51. . The target lens shape data is given as (rn, ρn) (n = 1, 2,..., N) in the form of a radial length and a radial angle. When the target lens shape data is input, the left and right target target lens shapes FT based on the target lens shape data are displayed on the screen 500 of the display 5 as shown in FIG. On the screen 500a, layout data regarding the positional relationship of the optical center of the lens LE with respect to the geometric center FC of the target lens shape is input as another processing condition. The distance between the left and right pupils (PD value) of the wearer is input to the input field 501, the distance between the centers of the left and right rims (FPD value) is input to the input field 502, and the target lens shape is input to the input fields 503a and 503b. The height of the optical center OC of the lens LE with respect to the geometric center FC is input. Also, as processing conditions, the lens material, the type of spectacle frame, the processing mode (whether the processing type of the lens periphery is flat processing with beveling, etc.), the position of the lens chuck center (optical center, geometry of the target lens shape) Center) is input by the switches 511, 512, 513, and 514.

  After the processing condition data is input and the lens LE is chucked on the chuck shaft, when the signal of the processing start switch of the switch unit 7 is input, the lens outer diameter detection unit 500 is driven and the unprocessed lens LE is driven. The outer diameter size is detected. Based on this detection result, it is determined whether or not the outer diameter of the unprocessed lens LE is sufficient for the input target lens shape. Next, the lens edge position detection units 300F and 300R are driven to detect the edge positions of the front surface and the rear surface of the lens with respect to the target lens shape. When the beveling mode of the normal low curve lens is set, the edge thickness is divided at a predetermined ratio (for example, 3: 7 from the lens front side) based on the edge positions of the front surface and the rear surface of the lens. The bevel trajectory data for arranging the bevel apex is calculated by the control unit 50.

  After measuring the edge position, the process moves to lens peripheral edge processing. The movement of the lens chuck shafts 102R and 102L in the X-axis direction and the Y-axis direction is controlled based on the target lens shape data, and the peripheral edge of the lens LE is roughly processed by the roughing grindstone 162, and then the peripheral edge of the lens LE by the finishing grindstone 164. Is finished. When the beveling mode is set, the X-axis movement and the Y-axis movement of the lens chuck shafts 102R and 102L are controlled based on the bevel locus data, and a bevel is formed on the periphery of the lens LE by the finishing grindstone 164. .

  Next, an automatic calibration operation that is periodically performed will be described. As the periodic timing of automatic calibration, the number of processed lenses or elapsed time is typically employed. The control unit 50 counts the number of processed lenses and the elapsed time. The control unit 50 is held by the lens chuck shaft when the number of processed lenses reaches a predetermined number or when a predetermined period of time has elapsed. When a processing start signal is input during processing of the lens LE, the normal lens processing mode is automatically switched to the automatic calibration mode. In the automatic calibration mode, prior to the processing of the lens LE based on the input target lens shape (hereinafter referred to as the input target lens shape), a calibration target lens is determined based on the input target lens, and the lens based on this calibration target lens Measurement of the outer diameter size and the like is automatically performed.

  FIG. 6 is a diagram illustrating an example of determining a calibration target lens. In FIG. 6, FT1 is an input target lens. FS is a calibration target lens. The calibration target lens FS is expected to have a fluctuation amount when the outer diameter size is processed to be small, and is expected to have a fluctuation when a lens rotation angle shift (so-called AXIS shift) occurs, the input target lens shape FT1 (rn , Ρn) (n = 1, 2,..., N). In the beveling process, a calibration target lens FS having a size larger than that of the input target lens FT1 is determined so that the height of the bevel formed by the finishing grindstone 164 can be secured. As a result, even when the outer diameter size is processed to be small and the rotation angle of the lens shifts, correction processing according to the subsequent input lens shape FT1 can be performed, and the lens can be used without being wasted.

  Further, the calibration lens FS preferably has a shape including at least a circular portion FSa having the same radius Rs with the chuck center C1 (in the case of the frame center chuck being coincident with the geometric center FC of the lens) as a center. It is determined. The circular portion FSa is a region where the outer diameter size is detected, and it is sufficient to include at least a certain angle range (for example, 5 degrees or more) in which the occurrence of the rotational deviation of the lens is expected. By measuring the outer diameter size of the circular portion FSa, even when the lens rotation angle is deviated, fluctuations in the outer diameter size can be accurately detected in a state where the influence is removed. More preferably, the circular portion FSa is set at two or more locations in the diameter direction around the chuck center C1. By measuring the outer diameter size of the circular portion FSa in the diameter direction, the influence of the deflection of the chuck shaft can be eliminated, and the variation of the outer diameter size can be accurately performed. In the example of FIG. 6, the circular portion FSa is set at four places.

  Further, the calibration target lens shape FS is set so as to include a straight portion FSb in a certain direction with a certain length or longer (for example, 20 mm or longer) in order to be able to detect fluctuations in the rotation angle of the lens. Is preferred. In the example of FIG. 6, the straight line portion FSb is set in a direction parallel to the x axis of the xy coordinate of the target lens shape. By detecting the direction component of the straight line portion FSb, a shift in the rotation angle of the lens is detected.

  The machining operation in the automatic calibration mode will be described. Similar to normal lens processing, the lens outer diameter detection unit 500 is first driven to detect the outer diameter size of the unprocessed lens LE. Here, the calibration target lens shape FS in FIG. 6 is determined so as to fall within the outer diameter size of the raw lens LE. When the calibration target lens FS is determined, the lens edge position detection units 300F and 300R are then driven to detect the front and rear edge positions of the lens relative to the calibration target lens FS. Then, based on the detected edge position, a bevel path for bevel formation is calculated by a predetermined calculation method. For example, the bevel trajectory is calculated so that the bevel apex is arranged at a position shifted from the edge position on the front surface of the lens to the rear surface side by a certain distance.

  After the measurement of the edge position, the process proceeds to the peripheral processing of the lens. The movements of the lens chuck shafts 102R and 102L in the X-axis direction and the Y-axis direction are controlled based on the calibration target lens FS, and the peripheral edge of the lens LE is roughly processed by the rough grindstone 162. Next, the movement of the lens chuck shafts 102R and 102L in the X-axis direction and the Y-axis direction is controlled based on the calibration target lens FS and the bevel path, and the periphery of the lens LE is finished. At this time, a bevel is formed at the edge of the lens by the V groove of the finishing grindstone 164.

  After finishing the bevel finishing, the lens outer diameter detection unit 500 is driven, and the lens shape of the portion corresponding to the circular portion FSa of the calibration target lens FS is measured. The motor 150 is driven by the control unit 50, the chuck shafts 102L and 102R are positioned at predetermined measurement positions for outer diameter measurement, and the motor 145 is driven so that the circular portion 521a of the probe 520 is at the processed bevel apex. The lens LE is moved in the X-axis direction so as to come into contact. Thereafter, the probe 520 (in the circle 521a) placed at the retracted position is brought into contact with the bevel of the lens LE, and the lens LE is rotated. The radius of the four circular portions FSa is measured by the output signal from the encoder 511. The diameter size of the circular portion FSa obtained in a plurality of diameter directions is averaged. As a result, the diameter size of the circular portion FSa can be obtained with reference to the chuck center C1, and the influence is removed even when the chuck shaft is bent. Further, even if a deviation occurs in the rotation angle of the lens, only the variation in the outer diameter size can be detected separately from the deviation in the rotation angle. The detected diameter size of the circular portion FSa is compared with the diameter size of the circular portion FSa of the calibration target lens FS, thereby obtaining adjustment data Δy of the outer diameter size. The calibration data of the outer diameter size stored in the memory 51 is rewritten after correcting the newly obtained adjustment data Δy.

  Next, the process proceeds to a measurement process for obtaining adjustment data of the rotation angle of the lens. In this measurement process, even when there is a change in the outer diameter size of the lens, the measurement is performed as follows in order to obtain a change in the rotation angle of the lens separately from this. As shown in FIG. 7, the beveled lens LE is rotated so that the straight line portion FSb of the calibration target lens FS coincides with the Y-axis direction of the processing apparatus 1. When the measuring element 520 (cylindrical portion 521a) is brought into contact with the linear portion FSb and the Y-axis motor 150 is driven in this state, the chuck shafts 102L and 102R (lens LE) are in the Y-axis direction as indicated by the arrow B. Is moved by a certain distance ΔY (for example, 10 mm). The variation information of the probe 520 at this time is obtained from the output of the encoder 511. While the lens LE is moved by the distance ΔY, when there is no change in the probe 520, the straight line portion FSb is parallel to the Y axis, and adjustment (calibration) related to the rotation angle of the lens is unnecessary. However, if there is a change in the probe 520, adjustment data relating to the rotation angle is obtained based on the change amount. That is, when the variation of the probe 520 is Δd while the lens LE is moved by the distance ΔY, if the rotation angle adjustment amount is Δθ, the adjustment amount Δθ is given by tan (Δθ) = Δd / ΔY. can get. The adjustment direction of Δθ is determined by the +/− direction of the fluctuation amount Δd. The rotation angle calibration data stored in the memory 51 is corrected and rewritten by the newly obtained adjustment data Δθ.

  The measurement for obtaining the adjustment data of the rotation angle of the lens can also be performed by the following method. That is, as in measuring the outer diameter size of the lens, the shape of the linear portion FSb can be obtained by rotating the lens LE while bringing the probe 520 into contact with the linear portion FSb of the beveled lens. By comparing the direction of the straight line portion FSb thus obtained with the direction of the straight line portion FSb of the calibration target lens shape FS, calibration data relating to the rotation angle is obtained. However, in this method, when there is a change in the outer diameter size of the lens, it is necessary to perform a correction calculation according to the change in the outer diameter size. In order to obtain the above, the method described in FIG. 7 is preferable.

  Next, the process for measuring the bevel position will be described. As shown in FIG. 8, the bevel apex VT formed in the circular portion FSa is brought into contact with the small-diameter cylindrical portion 521b of the measuring element 520, and the lens LE is illustrated as indicated by an arrow BA by driving the X-axis motor 145. 8 is moved to the left. Along with this movement, when the bevel apex VT enters the V groove 521v formed in the cylindrical portion 521b, the distance (distance from the chuck center C1) detected by the encoder 511 varies. When the distance detected by the encoder 511 is minimized, the position of the top of the bevel becomes the position in the X-axis direction. The movement information in the X-axis direction at this time is read from the encoder 146, whereby position data of the bevel position is obtained. By comparing the bevel position before calibration with the newly obtained bevel position, adjustment data Δx of the bevel position is obtained, and the calibration data stored in the memory 51 is corrected.

  In addition, when it switches to automatic calibration mode as mentioned above, that is displayed on the display 5 and it alert | reports to an operator. As a result, the operator can know that the time for automatic calibration has come, and can know that the lens held on the lens chuck shaft is being used for automatic calibration. It can be known that it takes time to complete the machining, and unnecessary troubles can be prevented.

  After the adjustment data of the outer diameter size, the rotation angle, and the bevel position is automatically obtained as described above, the lens LE processed based on the calibration target lens FS is continuously input to the actual input target lens FT1. And processing is performed based on the new calibration data stored in the memory 51. Since this machining process is the same as the normal machining operation described above, a duplicate description is omitted. At the time of finishing with the finishing grindstone 164, the adjustment data Δy for the outer diameter size is corrected for the control of the Y-axis movement before the calibration, the adjustment amount Δθ for the control of the lens rotation before the calibration is corrected, and before the calibration, The adjustment data Δx of the bevel position is corrected for the control of the X-axis movement. This correction processing ensures the processing accuracy of the lens. After the adjustment data is obtained, the number of processed lenses and the elapsed time counted by the control unit 50 are reset.

  The embodiment described above can be variously modified. For example, the automatic calibration mode using an actual lens is automatically switched when the number of processed lenses reaches a certain number, but a switch disposed on the display 5 when the operator determines that it is necessary. Optionally, the automatic calibration mode can be executed by 520. Further, when the processing performance deteriorates due to clogging of the finishing grindstone 164 or the rough grindstone 162, a dressing process is performed with a dressing rod in order to return the protrusion of the diamond grains of the grindstone to normal. At this time, the dress mode is performed by a predetermined switch operation. When the finishing grindstone 164 is dressed, the outer diameter size is likely to fluctuate, so that the automatic calibration mode is automatically switched during the next lens processing following the dressing mode. As a result, the calibration work after the dressing process is appropriately performed, and the labor of the operator is saved.

It is a schematic block diagram of a spectacle lens processing apparatus. It is a block diagram of a lens edge position detection unit. It is a schematic block diagram of a lens outer diameter detection unit, and a front view of a measuring element. It is explanatory drawing of the measurement of the lens outer diameter by a lens outer diameter detection unit. It is a control block diagram of a spectacle lens processing apparatus. It is a figure of the example of determination of the target lens for calibration. It is a figure explaining the measurement process which acquires adjustment data of the rotation angle of a lens. It is a figure explaining the measurement process of a bevel position.

5 Display 50 Control unit 51 Memory 101 Carriage 102L, 102R Lens chuck shaft 120 Motor 150 Motor 161a Spindle 164 Finishing wheel 300F, 300R Lens edge position detection unit 306F, 306R Measuring element 500 Lens outer diameter detection unit 520 Measuring element FT1 Input lens FS Calibration target FSa Circular part FSb Straight part

Claims (3)

A lens rotating means for rotating a lens chuck shaft for holding a spectacle lens, a finishing processing tool for finishing a peripheral edge of the spectacle lens, a processing tool rotating shaft to which the finishing processing tool is attached, and a relative position of the lens chuck shaft Moving means for changing the positional relationship, data input means for inputting the target lens data, and storage means for storing calibration data for lens processing by the finishing tool in advance, In the spectacle lens processing apparatus for processing the peripheral edge of the lens by the finishing tool based on the calibration data stored in the input lens) and the storage means ,
Lens outer diameter detecting means for detecting the outer diameter shape of the lens;
Calibration mode switching means for switching to an automatic calibration mode for obtaining lens processing calibration data from a normal lens processing mode;
Prior to processing based on the input lens of the lens held on the lens chuck shaft when switched to the automatic calibration mode, a calibration lens having a size larger than the input lens is based on the input lens. Calibration target lens determining means to determine;
Based on the determined calibration lens, the lens rotating means and the moving means are driven to finish the lens, and then the lens outer diameter detecting means is operated to detect the lens outer diameter shape and the calibration. Calibration data acquisition means for comparing with the target lens shape to obtain new calibration data;
A machining control means for rewriting the newly obtained calibration data by the calibration data acquisition means a calibration data stored in the storage means, For the processed lens on the basis of the calibration target lens shape, subsequently the Processing control means for driving and processing the lens rotating means and moving means based on the input lens shape and the calibration data newly stored in the storage means,
An eyeglass lens processing apparatus comprising: 2. The eyeglass lens processing apparatus according to claim 1, wherein the calibration lens determining means determines a calibration lens having a size larger than the input lens and including a circular portion having the same radius around the center of the chuck of the lens. The calibration data acquisition means obtains calibration data of an outer diameter based on a circular portion of the calibration target lens and a lens outer diameter of the circular portion detected by the lens outer diameter detection means. Eyeglass lens processing equipment. 3. The eyeglass lens processing apparatus according to claim 2, wherein the calibration lens determining means further determines a calibration lens so as to include a linear portion having a predetermined size and larger than an input lens. The data acquisition means obtains calibration data of the rotation angle of the lens based on the direction of the straight line portion detected by the lens outer diameter detection means and the direction of the straight line portion of the calibration target lens. Eyeglass lens processing equipment.

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