JP2006239782A - Spectacle lens machining device - Google Patents

Spectacle lens machining device Download PDF

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Publication number
JP2006239782A
JP2006239782A JP2005054829A JP2005054829A JP2006239782A JP 2006239782 A JP2006239782 A JP 2006239782A JP 2005054829 A JP2005054829 A JP 2005054829A JP 2005054829 A JP2005054829 A JP 2005054829A JP 2006239782 A JP2006239782 A JP 2006239782A
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lens
processing
tool
adjustment
finishing
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JP2005054829A
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JP4772342B2 (en
Inventor
Takayasu Yamamoto
貴靖 山本
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Nidek Co Ltd
株式会社ニデック
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a spectacle lens machining device, eliminating the time and trouble required for adjusting the shaft angle and size in grooving, chamfering and mirror-finishing and making adjustment with good accuracy. <P>SOLUTION: This spectacle lens machining device includes: a center distance detecting means for detecting the center distance between the lens rotating shafts 702L, 702R and a second machining tool rotating shaft 830; a machining pressure adjusting means for adjusting the pressure for pressing the second machining tool to a lens; a means for inputting reference lens shape data for adjusting the shaft angle; and a shaft angle adjustment control means for rotating the lens while the rotation of the second machining tool is stopped after the lens is finished by the finishing tool based upon the reference lens shape for adjusting the shaft angle, controlling the machining pressure adjusting means so that the pressure for pressing the lens to the second machining tool is made lower than that in machining, and obtaining an adjustment value of the shaft angle at the time of machining using the second machining tool according to the detection result detected by the center distance detecting means during the rotation of the lens and the lens shape for adjusting the shaft angle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

2. Description of the Related Art An eyeglass lens processing apparatus is known in which an eyeglass lens is held by a lens rotation shaft, roughed with a roughing grindstone while rotating the lens, and then finished with a finishing grindstone. In this type of equipment, the flat edge of the lens periphery is grooved with a grooving tool (grooving grindstone or grooving cutter), or the corner of the lens periphery is chamfered with a chamfering tool (grinding stone, etc.). To do. Further, mirror finishing is performed with a mirror finishing grindstone for normal finishing (see, for example, Patent Document 1).
JP 2001-353649 A

In this type of processing apparatus, adjustment work for calibrating the finished size and the shaft angle (AXIS) is performed for each processing tool at the time of manufacturing, installation of the apparatus, or the like. The axial angle adjustment is important when the lens LE to be processed has an astigmatic power. Conventionally, this adjustment work has been performed manually by the operator for all processing.
For example, in size adjustment for flat finishing, after processing with a circular lens shape with a diameter of 45 mm using an adjustment lens, the outside diameter of the actually processed lens is measured with a vernier caliper, etc. The error is obtained, and the adjustment value stored in the apparatus is corrected by the size error. The same processing is performed again to check the size error, and the process is repeated until the size error falls within the allowable range. Further, in adjusting the shaft angle for flat finishing, as shown in FIG. 9A, a horizontal ruled line M is put in the adjustment lens LE, and the lens is fixed so that the ruled line M is in the horizontal direction. After cupping the cup C, as shown in FIG. 9B, it is finished with a square having a side of 45 mm. The processed lens LE is placed on a graph paper, and an angle error α between the direction of the ruled line M and the horizontal direction of the graph paper is measured. If the shaft angle is deviated, the adjustment value stored in the apparatus is corrected by the error α. Repeat the same process until the angle error is within the allowable range. The size adjustment and shaft angle adjustment for the bevel finishing process are performed in the same manner.
In the size adjustment for grooving, as with the size adjustment for finish processing, after processing with a circular lens having a diameter of 45 mm using an adjustment lens, the peripheral edge of this lens is subjected to grooving. The depth is visually measured with a loupe with a scale, and the size deviation from the groove depth specified at the time of grooving is confirmed. If the size error between the groove depth and the specified depth is not within the allowable range, the adjustment value stored in the apparatus is corrected by the error. The same processing is repeated again until the size error falls within the allowable range.
In adjusting the shaft angle for grooving, as shown in Fig. 10 (a), after flat finishing to a square reference lens shape that allows the shaft angle to be specified, the periphery is grooved and finished. The deviation of the grooving vertex P2 with respect to the shape vertex P1 is visually measured with a magnifier with a scale, and the deviation angle error α is calculated. When the deviation angle error α is measured as + 0.4 °, for example, the adjustment value stored in the apparatus is corrected accordingly. The same machining is performed again, and the grooving vertex P2 for the finished shape vertex P1 is also visually measured. Next, as shown in FIG. 10B, when the angle error α is shifted by −0.2 °, the adjustment value is corrected accordingly. Repeat this procedure until it is within acceptable limits.
Similarly, in chamfering and mirror finishing, after finishing with the reference target lens shape, after each processing, the size and axial angle deviation are visually confirmed and adjusted manually.
Such manual adjustment takes time for adjustment and skill of the operator is required for accurate adjustment.

  The present invention provides a spectacle lens processing apparatus that can reduce the time and effort of adjusting the shaft angle and size in grooving, chamfering, mirror processing, etc., and can perform adjustment with high accuracy in view of the problems of the above-described conventional apparatus. Let it be a technical issue.

  In order to solve the above-mentioned problems, the present invention is characterized by having the following configuration.

(1) Lens rotating means for rotating a lens rotating shaft that holds a spectacle lens, a finishing tool for finishing the periphery of the lens, and a second for further performing second processing on the finished lens periphery. A processing tool, a second processing tool rotating shaft having at least one second processing tool of a groove drilling processing tool, a chamfering processing tool, and a mirror finishing processing tool, the lens rotating shaft and the second processing tool An inter-axis distance changing means for changing an inter-axis distance from the rotation axis, and after finishing the peripheral edge of the lens by the finishing tool, further performing a second processing on the peripheral edge of the lens by the second processing tool. In the eyeglass lens processing apparatus, the second processing tool is pressed against the lens by the inter-axis distance detection means for detecting the inter-axis distance between the lens rotation axis and the second processing tool rotation axis, and the inter-axis distance variation means. Adjust pressure The processing pressure adjusting means for adjusting, the target lens shape input means for inputting the reference target lens shape data for adjusting the shaft angle, and the lens rotation shaft is held based on the input reference target lens shape for adjusting the shaft angle. The lens rotating means and the inter-axis distance variation so as to rotate the lens while pressing the second processing tool in a state where the rotation of the second processing tool is stopped after finishing the finished lens with the finishing tool. And controlling the processing pressure adjusting means so that the pressure for pressing the lens against the second processing tool is weaker than that at the time of processing, and is detected by the inter-axis distance detecting means during the rotation of the lens. Shaft angle adjustment control means for obtaining an adjustment value of the shaft angle at the time of processing by the second processing tool based on the detected result and the reference target lens shape for adjusting the shaft angle.
(2) The eyeglass lens processing apparatus according to (1) further includes a second target lens shape input means for inputting reference target lens shape data for adjusting the lens processing size, and the input reference target lens for adjusting the processing size. After finishing the lens held on the lens rotation axis based on the shape by the finishing tool, the lens is rotated while pressing the second processing tool in a state where the rotation of the second processing tool is stopped. Controlling the lens rotating means and the inter-axis distance varying means, and controlling the processing pressure adjusting means so that the pressure for pressing the lens against the second processing tool is weaker than that during processing. A size adjustment system for obtaining an adjustment value of a processing size at the time of processing by the second processing tool based on a detection result detected by the inter-axis distance detection means during rotation and the reference target lens shape for processing size adjustment. And a means.
(3) In the spectacle lens processing apparatus according to (1), the spectacle lens processing apparatus includes an adjustment mode selection unit that selects an axis angle adjustment mode for adjusting an axis angle by the second processing tool, and the shaft angle adjustment control unit includes the axis angle adjustment mode. The operation of obtaining the adjustment value of the shaft angle is executed based on the selection signal.
(4) In the spectacle lens processing apparatus according to (2), the spectacle lens processing apparatus further includes an adjustment mode selection unit that selects a size adjustment mode for adjusting a processing size by the second processing tool, and the size adjustment control unit selects the size adjustment mode. An operation for obtaining an adjustment value of a machining size based on the above is executed.
(5) In the spectacle lens processing apparatus according to (1), the second processing tool is a grooving cutter, and an adjustment member having the same size as the grooving cutter is used instead of the grooving cutter as the second processing tool rotating shaft. An adjustment value is obtained by mounting.

  According to the present invention, it is possible to easily adjust the shaft angle and size in grooving, chamfering, or mirror finishing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external configuration diagram of a spectacle lens processing apparatus. A spectacle frame shape measuring device 2 is built in the upper right rear of the device main body 1. As the spectacle frame shape measuring apparatus 2, a known apparatus disclosed in Japanese Patent Laid-Open No. 4-93164 by the present applicant can be used. In front of the apparatus main body 1, there are a switch panel unit 410 for operating the spectacle frame shape measuring apparatus 2, a display 415 for displaying processing information, and various switches for inputting processing conditions and giving instructions for processing. A switch panel unit 420 is disposed. Reference numeral 402 denotes an opening / closing window for a processing chamber.

  FIG. 2 is a schematic configuration diagram of a lens processing unit disposed in the housing of the apparatus main body 1. A carriage unit 700 is mounted on the base 10, and the lens LE to be processed held (clamped) by the two lens rotation shafts 702 </ b> L and 702 </ b> R of the carriage 701 is ground by a grindstone group 602 attached to the grindstone rotation shaft 601. Processed. The grindstone group 602 includes a plastic rough grindstone 602a, a beveling and flat finishing grindstone 602b, and a beveling and flat working mirror finishing grindstone 602c used for mirror finishing. The rotating shaft 601 is rotatably attached to the base 10 by a spindle 603. A pulley 604 is attached to the end of the rotating shaft 601, and the pulley 604 is connected to a pulley 607 attached to the rotating shaft of the grindstone rotating motor 606 via a belt 605. A lens shape measuring unit 500 is provided behind the carriage 701. A chamfering / grooving mechanism 800 is provided in front of the carriage 701.

  The configuration of the carriage unit 700 will be described with reference to FIGS. 3 is a schematic configuration diagram of the carriage unit 700, and FIG. 4 is a diagram of the carriage unit 700 in FIG. 2 viewed from the E direction.

  The carriage 701 can rotate the lens LE by chucking the lens LE on the two lens rotation shafts 702L and 702R, and is rotated with respect to the carriage shaft 703 fixed to the base 10 and extending in parallel with the grindstone rotation shaft 601. It is slidable. In the following, the direction in which the carriage 701 is moved in parallel with the grindstone rotation axis 601 is the X axis direction, and the direction in which the distance between the lens rotation axes (702L, 703R) and the grindstone rotation axis 601 is changed by the rotation of the carriage 701 is Y. As the axial direction, a lens chuck mechanism and a lens rotation mechanism, and an X-axis movement mechanism and a Y-axis movement mechanism of the carriage 701 will be described.

<Lens chuck mechanism and lens rotation mechanism>
A lens rotation shaft 702L and a lens rotation shaft 702R are held on the same axis so as to rotate on the left arm 701L and the right arm 701R of the carriage 701, respectively. A cup receiver 763 is attached to the end of the rotating shaft 702L. On the other hand, a lens presser 764 is attached to the end of the rotating shaft 702R. A chuck motor 710 is fixed to the center upper surface of the right arm 701R, and the rotation of a pulley 711 attached to the rotation shaft of the motor 710 is rotatably held inside the right arm 701R via a belt 712. The screw 713 is rotated. The feed nut 714 is moved in the axial direction by the rotation of the feed screw 713. Thereby, the rotating shaft 702R connected to the feed nut 714 can move in the axial direction. At the time of processing, a cup as a fixing jig is attached to the front refractive surface of the lens LE, and the base of the cup is attached to the cup receiver 763 on the rotating shaft 702L side. By rotating the motor 710, the rotation shaft 702R is moved to the rotation shaft 702L side, the lens retainer 764 fixed to the rotation shaft 702L comes into contact with the rear surface of the lens LE, and the lens LE is held between the rotation shafts 702L and 702R. The

  A motor mounting block 720 is attached to the left end portion of the left arm 701L, and the rotation shaft 702L passes through the block 720 and a gear 721 is fixed to the left end thereof. A lens rotating motor 722 is fixed to the block 720. The rotation of the motor 722 is transmitted to the rotation shaft 702L via gears 724 and 721. A servo motor is used as the motor 722, and an encoder 722a capable of detecting the amount of rotation is provided on the rotating shaft. Servo motor 722 generates torque when a load is applied to its rotating shaft.

  A pulley 726 is attached to the rotation shaft 702L inside the left arm 701L. The pulley 726 is connected by a timing belt 731a and a pulley 703a fixed to the left end of a rotating shaft 728 that is rotatably held behind the carriage 701. The pulley 703b fixed to the right end of the rotation shaft 728 is connected to a pulley 733 slidably mounted in the carriage right arm 701R in the axial direction of the rotation shaft 702R by a timing belt 731b. With this configuration, the rotation shaft 702L and the rotation shaft 702R rotate in synchronization.

<Carriage X-axis movement mechanism, Y-axis movement mechanism>
The carriage shaft 703 is provided with a moving arm 740 that is slidable in the axial direction. The moving arm 740 is attached to the carriage 701 so as to move in the X-axis direction (the axial direction of the shaft 703). Further, the front of the moving arm 740 is slidable on a guide shaft 741 fixed to the base 10 in a positional relationship parallel to the shaft 703. A rack 743 extending in parallel with the shaft 703 is attached to the rear portion of the moving arm 740, and a pinion 746 attached to the rotating shaft of the carriage X-axis moving motor 745 is engaged with the rack 743. The motor 745 is fixed to the base 10, and the carriage 701 can be moved in the X direction together with the moving arm 740 by rotational driving of the motor 745.

  As shown in FIG. 3B, a swing block 750 is attached to the moving arm 740 so as to be rotatable about an axis line La that coincides with the rotation center of the grindstone rotating shaft 601. The distance from the center of the shaft 703 to the axis La is set to be the same as the distance from the center of the shaft 703 to the rotation center of the lens rotation shafts 702L and 702R. A Y-axis motor 751 is attached to the swing block 750. A servo motor is used as the motor 751, and an encoder 751a capable of detecting the rotation amount is provided on the rotating shaft. The rotation of the motor 751 is transmitted via a pulley 752 and a belt 753 to a female screw 755 that is rotatably held by the swing block 750. A feed screw 756 is engaged with and inserted into a screw portion in the female screw 755, and the feed screw 756 moves up and down by the rotation of the female screw 755.

  The upper end of the feed screw 756 is fixed to the motor mounting block 720. As the feed screw 756 moves up and down by the rotation of the motor 751, the carriage 701 attached to the block 720 can also change its vertical position. That is, the carriage 701 can rotate around the shaft 703 and change the inter-axis distance L between the lens rotation shafts 702L and 702R and the grindstone rotation shaft 601. The processing pressure of the lens LE (pressure against the grindstone) is generated by controlling the rotational torque of the motor 751. The rotational torque of the motor 751 is adjusted by the voltage applied to the motor 751, and the machining pressure is also adjusted (functions as a machining pressure adjusting means). For example, a compression spring or the like is preferably provided between the left arm 701L and the moving arm 740 so as to reduce the load under the carriage 701. The processing pressure adjusting mechanism may be configured by a spring that pulls the carriage 701 toward the grindstone and a mechanism that changes the spring force.

  The configuration of the chamfering / grooving mechanism 800 will be described with reference to FIG. A fixed plate 802 is fixed to a support base block 801 (see FIG. 2) on the base 10. Above the fixed plate 802, a pulse motor 805 for rotating the arm 820 to move the grindstone 840 between the machining position and the retracted position is fixed. A holding member 811 that rotatably holds the arm rotation member 810 is fixed to the fixed plate 802, and a large gear 813 is fixed to the arm rotation member 810 extending to the left side of the fixed plate 802. A gear 807 is attached to the rotation shaft of the pulse motor 805, and the rotation of the gear 807 by the pulse motor 805 is transmitted to the large gear 813 via the idler gear 815, and the arm 820 fixed to the arm rotation member 810 is rotated. The

  A motor 821 for rotating the grindstone is fixed to the large gear 813, and the motor 821 rotates together with the large gear 813. The rotating shaft of the motor 821 is connected to a shaft 823 that is rotatably held in the arm rotating member 810. A pulley 824 is attached to the end of the shaft 823 extending into the arm 820. A holding member 831 that rotatably holds the grindstone rotating shaft 830 is fixed to the distal end side of the arm 820. A pulley 832 is attached to the left end of the grindstone rotating shaft 830. The pulley 832 is connected by a pulley 824 and a belt 835, and the rotation of the motor 821 is transmitted to the grindstone rotating shaft 830. A chamfering grindstone 841a for the lens rear surface, a chamfering grindstone 841b for the lens front surface, and a grooving grindstone 842 as a grooving tool are attached to the grindstone rotating shaft 830. The grindstone rotating shaft 830 is disposed at an angle of about 8 degrees with respect to the axial direction of the lens rotating shafts 702L and 702R, and the grooving grindstone 842 makes it easy to form a groove along the lens curve. The chamfering grindstone 841a, the chamfering grindstone 841b, and the grooving grindstone 842 are circular, and the outer diameter is about 30 mm.

  At the time of grooving and chamfering, the arm 820 is rotated by the pulse motor 805, and the grindstone 840 is moved from the retracted position to the machining position. The processing position of the grindstone portion 840 is a position where the grindstone rotation shaft 830 is placed on the plane where both rotation shafts are located between the lens rotation shafts 702L and 702R and the grindstone rotation shaft 601. Accordingly, the distance between the axis of the lens rotation shafts 702L and 702R and the rotation shaft 830 can be changed by the motor 751 as in the lens peripheral edge processing by the grindstone group 602.

  FIG. 6 is a schematic configuration diagram of the lens shape measuring unit 500 (lens edge position detecting mechanism). An arm 505 having a probe 503 for measuring the rear surface of the lens is fixed to the right end of the shaft 501. In addition, an arm 509 having a probe 507 for measuring the front surface of the lens is fixed to the central portion of the shaft 501. The leading end of the measuring element 503 and the leading end of the measuring element 507 are opposed to each other, and each leading end contacts the rear surface and the front surface of the lens LE. An axis connecting the contact point of the probe 503 and the contact point of the probe 507 is in a parallel relationship with the axis of the lens rotation shafts 702L and 702R. The shaft 501 is movable integrally with the slide base 510 in the axial direction of the lens rotation shafts 702L and 702R.

  The slide base 510 is provided with a rack 530 extending in the left-right direction, and the movement of the slide base 510 in the left-right direction is detected by the encoder 531 via the rack 330. In addition, behind the slide base 510, a "<"-shaped drive plate 511 is rotatable about an axis 512, and an inverted "<"-shaped drive plate 513 is rotatable about an axis 514. Is provided. A spring 515 that urges the drive plate 511 and the drive plate 513 in a direction to bring them closer is stretched between the drive plate 511 and the drive plate 513. Further, a limit pin 517 is provided between the end surface 511 a of the drive plate 511 and the end surface 513 a of the drive plate 513. When no external force is applied to the slide base 510, the limit pin 517 brings the end surface 511 a of the drive plate 511 into contact with the end surface 513 a of the drive plate 513, and this is the origin of the lateral movement. Further, guide pins 519 that are in contact with the end surface 511 a of the drive plate 511 and the end surface 513 a of the drive plate 513 are fixed to the slide base 510. When a force that moves rightward is applied to the slide base 510, the guide pin 519 moves the end surface 513a to the right. At this time, the slide base 510 is urged by a spring 515 in a direction to return to the origin position. On the contrary, when a force to move leftward is applied to the slide base 510, the guide pin 519 moves the end surface 511a to the left. Similarly, the slide base 510 is urged by the spring 515 in a direction to return to the origin. The From such movement of the slide base 510, the encoder 531 detects the amount of movement of the probe 303 that contacts the rear surface of the lens LE and the probe 507 that contacts the front surface of the lens LE. The shaft 501 is rotated around an axis by a motor (not shown), and the measuring elements 503 and 507 are moved from the retracted position to the measuring position.

  At the time of measuring the lens shape, the lens LE is moved to the left in FIG. 6, and the measuring element 507 is brought into contact with the front surface of the lens LE. A force acts on the measuring element 507 so as to always contact the front surface of the lens by the spring 515. In this state, the edge position of the front refractive surface of the lens LE is detected by the encoder 531 by moving the carriage 701 up and down according to the radius vector information while rotating the lens LE. Similarly, the encoder 531 detects the edge position of the rear refractive surface of the lens LE by bringing the probe 503 into contact with the rear surface of the lens LE and moving the carriage 701 up and down according to the moving radius information while rotating the lens LE. .

  Next, the operation of the shaft angle adjustment and the size adjustment in lens processing will be mainly described using the control block diagram of FIG. First, size adjustment and axis angle (AXIS) adjustment are performed for each of the flat finishing and the bevel finishing of the lens LE. This is done manually as before. In other words, the size adjustment for each finishing process is finished with a circular reference lens shape having a diameter of 45 mm (this reference lens shape is stored in the memory 120 and can be called and input by the switch operation of the switch panel unit 420). After processing, the size is measured with a caliper or the like, and an adjustment parameter screen is called on the display 415 by switch operation of the switch panel unit 420, and the size adjustment value for finishing processing stored in the adjustment value memory 132 Is corrected by increasing or decreasing by the confirmed error. In addition, as shown in FIG. 9, the finishing angle of the adjustment lens LE with the horizontal ruled line M is finished with a square having a side of 45 mm, and the processed lens LE is placed on a graph paper. Then, the angle error α between the direction of the ruled line M and the horizontal direction of the graph paper is measured. If the shaft angle is shifted, a parameter screen for adjustment is called on the display 415, and the shaft angle adjustment value for finishing stored in the adjustment value memory 132 is increased or decreased by the confirmed angle error and corrected.

  The size and axis angle adjustment of the second grooving process, chamfering process, and mirror surface finishing process that are further performed after the finishing process will be described. These adjustments are automatically performed on the basis of the target lens shape data whose size and shaft angle are known by selecting a predetermined adjustment mode of the switch panel unit 420 with a selection switch.

  First, size adjustment in grooving will be described. The operator prepares the adjustment lens LE and holds it on the lens rotation shafts 702L and 702R, and then operates the switch panel unit 420 to select the automatic grooving size adjustment mode. The reference target lens shape for adjusting the size of the grooving is, for example, a circular shape having a diameter of 45 mm (dynamic radius r = 22.5 mm), as in the flat finishing process. This is stored in the target lens memory 120 and is called by the switch operation of the switch panel unit 420 and input to the control unit 100. When the processing start switch is pressed, the control unit 100 measures the lens shape by the lens shape measuring unit 500 based on the reference target lens shape data for size adjustment as in the normal processing, and then performs rough processing with the rough grindstone 602a. Subsequently, flat finishing is performed by the finishing grindstone 602b.

  When the flat finishing is completed, the process proceeds to a reference size adjusting process for the grooving grindstone. The control unit 100 drives and controls the pulse motor 805 to rotate the arm 820 and place the rotary shaft 830 of the grindstone for grinding 842 at the machining position. At this time, if the rotating shaft 830 of the grindstone 842 is at a predetermined machining position as designed, no size error or shaft angle error will occur, but there will be a slight deviation for each machining device, which is an error during machining. It becomes. For this reason, size adjustment and shaft angle adjustment are required for each processing apparatus.

  The controller 100 moves the carriage 701 in the X-axis direction so that the lens LE is positioned on the grindstone 842 based on the edge position detection after finishing the lens LE by the lens shape measuring unit 500. In a state in which the rotation of the groove grindstone 842 is stopped, the motor 751 is driven and controlled to lower the carriage 701, and the peripheral edge of the lens LE, which is the flat finish of the lens LE, is pressed against the groove grindstone 842. At this time, the control part 100 adjusts the pressure which presses the lens LE against the grindstone 842 for grooving to a pressure (0.5-1 Kg) weaker than the pressure (4.5-5.0 Kg) at the time of grooving. . The pressure for pressing the lens LE is detected as the rotational torque of the motor 751 from the motor load current detected by the current detection circuit of the driver 117 connected to the motor 751. The controller 100 rotates the lens LE by the motor 722 while pressing the lens LE against the grindstone 842 with this weak pressure. At this time, since the rotation of the grindstone 842 is stopped, the periphery of the lens LE is not processed. The controller 100 reads the inter-axis distance L for each lens rotation angle detected by the encoder 722a via the driver 115 from the output signal of the encoder 751a while rotating the lens LE by the motor 722. Then, the reference value in the adjustment value memory 131 is corrected using this as a reference value for the grooving size with respect to the reference target lens shape (moving radius r = 22.5 mm). Since the reference shape of the target lens for size adjustment is circular, the acquisition of the size reference data may be a value at only one location on the lens periphery, but is preferably an average value for the entire circumference. Thereby, the reference value of the processing size of the grooving grindstone is automatically adjusted.

  Next, shaft angle adjustment in grooving will be described. Similar to the size adjustment, the operator holds the adjustment lens LE on the lens rotation shafts 702L and 702R, and then operates the switch panel unit 420 to select the groove angle automatic angle adjustment mode. The reference target lens shape for adjusting the shaft angle for grooving is a square shape with a side of 45 mm that can specify the shaft angle in the same manner as the shaft angle adjustment for flat finishing. By calling the switch lens of the switch panel unit 420 and calling the reference lens shape of the shaft angle adjustment stored in the lens shape memory 120, it is input to the control unit 100 for processing. When the processing start switch is pressed, the control unit 100 operates the lens shape measuring unit 500 based on the reference target lens shape data to measure the lens shape, and then performs rough processing using the roughing grindstone 602a and flat finishing processing using the finishing grindstone 602b. Do.

  When the flat finishing is completed, the process proceeds to the process of adjusting the reference axis angle of the grooving grindstone. As in the case of size adjustment, the control unit 100 moves the carriage 701 in the X-axis direction so that the lens LE is positioned on the grindstone for grinding 842 based on the detection of the edge position after finishing the lens LE by the lens shape measuring unit 500. Then, the motor 751 is driven to lower the carriage 701 while the rotation of the finishing grindstone 602b is stopped, and the lens LE is moved to the motor 722 while pressing the lens LE against the finishing grindstone 602b with a pressure lower than that during processing. Rotate with. The control unit 100 reads the value of the inter-axis distance L from the output signal of the encoder 751a for each moving radius angle detected by the encoder 722a while rotating the lens LE by the motor 722. FIG. 8 is a graph schematically showing the relationship between the lens rotation angle and the inter-axis distance L at this time. The control unit 100 obtains the angles θ1, θ2, θ3, θ4 of the inflection points at which the inter-axis distance L turns from increasing to decreasing. Next, since the reference lens shape is square and the angles of the vertices are 45 °, 135 °, 225 °, and 315 °, the angle errors Δθ1, Δθ2, Δθ3, and Δθ4 with each θ1 to θ4 are calculated. Further, the average value Δθav is obtained. The adjustment value of the groove shaft angle stored in the adjustment value memory 132 is corrected by this average error Δθav. Although the detection of the angle error may be performed at only one place, it is preferably an average value of the angle errors obtained at the apex of the processed shape.

  In addition, when the radius vector length with respect to the radius vector angle of the finishing shape of the lens LE is not the same, the edge position in the X-axis direction varies depending on the radius vector angle. Therefore, when the lens LE is pressed against the grooving grindstone 842 to detect the change in the inter-axis distance L, the position in the X-axis direction is controlled based on the detection result of the lens edge position by the lens shape measuring unit 500.

  As described above, the size adjustment and the shaft angle adjustment of the grooving process have been described. However, the chamfering process and the mirror finishing process can be automatically adjusted by basically the same procedure. That is, in the automatic adjustment of the chamfering size, when the chamfering size automatic adjustment mode is selected and the processing is started, the control unit 100, like the case of adjusting the groove size, has a circular reference ball having a diameter of 45 mm. Based on the mold shape, the lens shape measuring unit 500 is operated to measure the edge positions of the front and rear surfaces of the lens, and then roughing and finishing are performed. Then, with the chamfering grindstone 841a positioned at the processing position and the rotation of the chamfering grindstone 841a stopped, the lens LE (corner) finished on the chamfering grindstone 841a is pressed against the lens with a weak pressure. LE is rotated, and an inter-axis distance L (distance between the lens rotation axis and the grindstone rotation axis 830) during lens rotation is read by the encoder 722a. Then, the reference value stored in the adjustment value memory 131 is corrected using the average value of the inter-axis distance L as the chamfer size reference value. The same applies to the chamfering grindstone 841b for the rear surface.

  In the chamfering axis angle adjustment, when the chamfering axis angle automatic adjustment mode is selected and the machining is started, the control unit 100, like the grooving axis angle adjustment, has a square reference lens shape with a side of 45 mm. Then, the lens shape measuring unit 500 is operated to measure the edge positions of the front and rear surfaces of the lens, and then roughing and finishing are performed. Then, with the chamfering grindstone 841a positioned at the processing position and the rotation of the chamfering grindstone 841a stopped, the lens LE (corner) finished on the chamfering grindstone 841a is pressed against the lens with a weak pressure. LE is rotated, and the relationship of the inter-axis distance L with respect to the rotation angle of the lens is detected by the encoder 722a. Then, after obtaining the angle of the inflection point from the change in the inter-axis distance L, the angle error (average value) between this and the apex angle of the reference target lens is obtained, and only the angle error is stored in the adjustment value memory 132. Correct the chamfer shaft angle adjustment value. The same applies to the chamfering grindstone 841b for the rear surface.

  Even in the size adjustment and the shaft angle adjustment of the chamfering grindstone, when the lens LE is pressed against the chamfering grindstone 841a (841b) to detect the variation in the inter-axis distance L, the lens edge position is detected by the lens shape measuring unit 500. Based on the result, the position in the X axis direction is controlled.

  The size adjustment and the shaft angle adjustment for mirror finishing are basically the same as described above. The mirror finishing grindstone 602c is attached to the same rotating shaft 601 as the finishing grindstone 602b. However, if the parallel angle of the rotating shaft 601 with respect to the lens rotating shafts 702L and 702R is shifted, the processing position of the finishing grindstone 602b is shifted. Further, the relationship between the processing positions of the mirror-finishing grindstone 602c and the finishing grindstone 602b is also different. For this reason, size adjustment and shaft angle adjustment are performed also in the mirror finishing grindstone 602c.

  In the apparatus of the above embodiment, the configuration of the type in which the lens rotation shafts 702L and 702R are moved by the carriage 701 to change the inter-axis distance with the grindstone rotation shafts 601 and 830 has been described. Even if it is the structure to move, it can carry out similarly. Further, the grooving tool may be attached to a rotating shaft different from the chamfering grindstones 841a and 842b.

  In the grooving process, a grindstone is used as a processing tool, but a grooving cutter may be used. When a grooving cutter is used, it can be dealt with by adjusting the size and the shaft angle by replacing with a ring (adjusting member) having the same diameter as the cutter.

It is an external appearance block diagram of a spectacles lens processing apparatus. It is a schematic block diagram of a lens process part. It is a schematic block diagram of a carriage part. FIG. 3 is a diagram when the carriage portion in FIG. 2 is viewed from the E direction. It is a figure explaining the structure of a chamfering / grooving mechanism part. It is a schematic block diagram of a lens shape measurement part. It is a control block diagram of a spectacle lens processing apparatus. It is the figure which made the graph the relationship between the lens rotation angle at the time of reference axis angle adjustment of a ditching grindstone, and the distance between axes. It is a figure explaining the size adjustment method of the flat finishing process by a manual. It is a figure explaining the shaft angle adjustment method of manual grooving.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Control part 117 Driver 415 Display 420 Switch panel part 500 Lens shape measurement part 601 Grinding wheel rotating shaft 602a Coarse whetstone 602b Finishing whetstone 602c Mirror surface finishing whetstone 701 Carriage 702L, 702R Lens rotating shaft 722 Motor 722a Encoder 751 Motor 751 Digging mechanism section 821 Motor 830 Grinding wheel rotating shaft 841a, 841b Chamfering grindstone 842 Groove grindstone


Claims (5)

  1. A lens rotating means for rotating a lens rotating shaft for holding a spectacle lens, a finishing tool for finishing the peripheral edge of the lens, and a second processing tool for further performing a second processing on the lens peripheral edge A second processing tool rotating shaft having at least one second processing tool of a grooving processing tool, a chamfering processing tool and a mirror finishing processing tool, the lens rotating shaft and the second processing tool rotating shaft; Eyeglass lens processing, wherein after finishing the peripheral edge of the lens by the finishing tool, the second processing tool further performs the second processing on the peripheral edge of the lens. In the apparatus, an inter-axis distance detecting means for detecting an inter-axis distance between the lens rotating shaft and the second processing tool rotating shaft, and a pressure for pressing the second processing tool against the lens by the inter-axis distance varying means is adjusted. Do Work pressure adjusting means, target lens shape input means for inputting reference target lens shape data for adjusting the shaft angle, and a lens held on the lens rotation shaft based on the input reference target lens shape for adjusting the shaft angle The lens rotating means and the inter-axis distance varying means are configured to rotate the lens while pressing the second processing tool in a state where the rotation of the second processing tool is stopped after finishing with the finishing tool. And controlling the processing pressure adjusting means so that the pressure for pressing the lens against the second processing tool is weaker than that during processing, and is detected by the inter-axis distance detecting means during rotation of the lens. A spectacle lens processing comprising: an axis angle adjustment control means for obtaining an adjustment value of an axis angle at the time of processing by the second processing tool based on a detection result and the reference lens shape for adjusting the shaft angle. apparatus
  2. The eyeglass lens processing apparatus according to claim 1 is further based on a second target lens shape input unit for inputting reference target lens shape data for adjusting a lens processing size, and the input reference target lens shape for processing size adjustment. The lens held on the lens rotation shaft is finished by the finishing tool, and the rotation of the second processing tool is stopped and the lens is rotated while pressing the second processing tool. While controlling the lens rotating means and the inter-axis distance varying means, the processing pressure adjusting means is controlled so that the pressure that presses the lens against the second processing tool is weaker than that during processing, and during the rotation of the lens A size adjustment control hand that obtains an adjustment value of a processing size at the time of processing by the second processing tool based on the detection result detected by the inter-axis distance detection means and the reference target lens shape for processing size adjustment. If, eyeglass lens processing apparatus comprising: a.
  3. 2. The eyeglass lens processing apparatus according to claim 1, further comprising adjustment mode selection means for selecting an axis angle adjustment mode for adjusting an axis angle by the second processing tool, wherein the axis angle adjustment control means is a selection signal for the axis angle adjustment mode. An eyeglass lens processing apparatus that performs an operation of obtaining an adjustment value of an axis angle based on
  4. 3. The eyeglass lens processing apparatus according to claim 2, further comprising an adjustment mode selection unit that selects a size adjustment mode for adjusting a processing size by the second processing tool, wherein the size adjustment control unit is based on a selection signal of the size adjustment mode. An eyeglass lens processing apparatus that performs an operation of obtaining an adjustment value of a processing size.
  5. 2. The eyeglass lens processing apparatus according to claim 1, wherein the second processing tool is a grooving cutter, and an adjustment member having the same size as the grooving cutter is attached to the second processing tool rotating shaft in place of the grooving cutter. A spectacle lens processing apparatus characterized by obtaining a value.



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KR100820760B1 (en) 2006-10-31 2008-04-11 유병훈 Apparatus for processing a lens
EP1952943A2 (en) 2007-02-02 2008-08-06 Nidek Co., Ltd. Eyeglass lens processing apparatus
WO2008114781A1 (en) * 2007-03-16 2008-09-25 Hoya Corporation Method for edging lens of glasses
EP1974855A1 (en) 2007-03-28 2008-10-01 Nidek Co., Ltd. Eyelass lens processing apparatus
EP1974857A2 (en) 2007-03-30 2008-10-01 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP1974856A1 (en) 2007-03-30 2008-10-01 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP2106879A1 (en) 2008-03-31 2009-10-07 Nidek Co., Ltd. Eyeglass lens processing apparatus
JP2011073114A (en) * 2009-09-30 2011-04-14 Nidek Co Ltd Calibration sensor unit of spectacle lens processing device
JP2011073134A (en) * 2010-03-02 2011-04-14 Nidek Co Ltd Spectacle lens processing device
EP2319659A2 (en) 2009-09-30 2011-05-11 Nidek Co., Ltd. Eyeglass lens processing apparatus
US8007344B2 (en) 2007-03-30 2011-08-30 Nidek Co., Ltd. Eyeglass lens processing apparatus
CN106002535A (en) * 2015-03-31 2016-10-12 尼德克株式会社 Eyeglass lens processing apparatus
EP2926950A4 (en) * 2012-11-06 2016-10-19 Hoya Corp Lens-finishing system, finished size management device, finished size management method and eyeglass lens manufacturing method

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JP2001353649A (en) * 2000-06-15 2001-12-25 Nidek Co Ltd Spectacle lens machining device
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JP2004237389A (en) * 2003-02-05 2004-08-26 Nidek Co Ltd Spectacle lens working device

Cited By (26)

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KR100820760B1 (en) 2006-10-31 2008-04-11 유병훈 Apparatus for processing a lens
EP1952943A2 (en) 2007-02-02 2008-08-06 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP2138269A1 (en) * 2007-03-16 2009-12-30 Hoya Corporation Method for edging lens of glasses
WO2008114781A1 (en) * 2007-03-16 2008-09-25 Hoya Corporation Method for edging lens of glasses
EP2138269A4 (en) * 2007-03-16 2013-09-18 Hoya Corp Method for edging lens of glasses
JPWO2008114781A1 (en) * 2007-03-16 2010-07-08 Hoya株式会社 Edge-grinding method for eyeglass lenses
JP4988823B2 (en) * 2007-03-16 2012-08-01 Hoya株式会社 Edge-grinding method for eyeglass lenses
US8216024B2 (en) 2007-03-16 2012-07-10 Hoya Corporation Spectacle lens edging method
EP1974855A1 (en) 2007-03-28 2008-10-01 Nidek Co., Ltd. Eyelass lens processing apparatus
US7848843B2 (en) 2007-03-28 2010-12-07 Nidek Co., Ltd. Eyeglass lens processing apparatus and lens fixing cup
US7731565B2 (en) 2007-03-30 2010-06-08 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP1974856A1 (en) 2007-03-30 2008-10-01 Nidek Co., Ltd. Eyeglass lens processing apparatus
KR101456301B1 (en) 2007-03-30 2014-11-03 가부시키가이샤 니데크 Eyeglass lens grinding machine
EP1974857A2 (en) 2007-03-30 2008-10-01 Nidek Co., Ltd. Eyeglass lens processing apparatus
US8007344B2 (en) 2007-03-30 2011-08-30 Nidek Co., Ltd. Eyeglass lens processing apparatus
US7713108B2 (en) 2007-03-30 2010-05-11 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP2106879A1 (en) 2008-03-31 2009-10-07 Nidek Co., Ltd. Eyeglass lens processing apparatus
KR101765910B1 (en) 2009-09-30 2017-08-07 가부시키가이샤 니데크 Spectacle lens processing apparatus
US8506352B2 (en) 2009-09-30 2013-08-13 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP2319659A2 (en) 2009-09-30 2011-05-11 Nidek Co., Ltd. Eyeglass lens processing apparatus
JP2011073114A (en) * 2009-09-30 2011-04-14 Nidek Co Ltd Calibration sensor unit of spectacle lens processing device
EP2319659A3 (en) * 2009-09-30 2015-09-16 Nidek Co., Ltd. Eyeglass lens processing apparatus
JP2011073134A (en) * 2010-03-02 2011-04-14 Nidek Co Ltd Spectacle lens processing device
EP2926950A4 (en) * 2012-11-06 2016-10-19 Hoya Corp Lens-finishing system, finished size management device, finished size management method and eyeglass lens manufacturing method
CN106002535A (en) * 2015-03-31 2016-10-12 尼德克株式会社 Eyeglass lens processing apparatus
CN106002535B (en) * 2015-03-31 2020-05-22 尼德克株式会社 Spectacle lens processing device

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