JP2000108000A - End face processing method for spectacle lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the processing speed of polishing, to improve the evenness of the finishing accuracy, and to obtain a fashionable spectacles, by making it possible to polish a V-groove surface mechanically, not to polish manually, after the V-groove finishing. SOLUTION: A polishing wheel 83 for V-groove polishing having a V-groove polishing groove 83a with the form corresponding to the V-groove surface of a finished lens 76 practically is prepared. The V-groove surface is polished in two processes by using this polishing wheel 83. In the first process, the margin part 175a at the recessed surface side of the V-groove surface is polished by slipping the V-groove top position 176 of the finished lens 76 from the V-groove center position 183 of the V-groove polishing groove 83a of the polishing wheel 83, to the lens recessed surface side. In the second process, the projecting surface side of the V-groove remaining from the polishing in the first process, and a margin part 175b of a polishing unevenness, are polished, by slipping the V-groove top position 176 to the lens convex surface side, and fitting the V- groove top position 176 of the finished lens 76, and the V-groove center position 183 of the polishing wheel 83.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyeglass lens end face processing method, a grindstone, and an eyeglass lens end face processing apparatus.
In particular, the present invention relates to mirror finishing and flattening performed on an end face after a bevel finish.

[0002]

2. Description of the Related Art A spectacle lens, which is generally called a three-piece type and has no frame, is not covered with a rim or the like but is exposed, so that a glossy polished surface is required. A technology in which the flattening of the end surface, which was performed to obtain a glossy polished surface in response to this, had been performed manually until now, but by providing a movement mechanism that can follow the polishing wheel part, it is performed by mechanical polishing. (For example, JP-A-64-87144). This is for polishing a slope such as an end face of a polyhedral cut lens, and the circumferential shape of the spectacle lens is complicated because it is polyhedral cut, but the end face itself to be polished is a flat surface. Simple. Therefore,
When the surface to be polished itself has a complicated shape such as a lens end surface having a bevel, the above technique cannot be applied. In the first place, since the lens end surface having the bevel is usually hidden by the rim of the frame, there is no demand for polishing the bevel surface, and the polishing of the lens end surface having the bevel is not usually performed.

[0003]

By the way, recently, there is a demand for a thin rim in order to reduce the weight of the frame and increase fashionability. However, when the lens to be fitted into the rim is a thick lens having a large edge, the lens must be removed from the rim of the frame. Protrusion often occurs. In such a case, if the grinding of the lens end surface is finished with a bevel finish, the bevel surface remains white, and an aesthetic problem has been pointed out. The only way to polish the remaining white bevel surface to make it transparent is to manually buff the bevel surface or the like, which requires a great deal of time and cost.

An object of the present invention is to solve the above-mentioned problems of the prior art by mechanically polishing a beveled surface in two steps, thereby increasing the processing speed of polishing and uniformity of finishing accuracy. Therefore, it is an object of the present invention to provide an eyeglass lens end face processing method, a grindstone, and an eyeglass lens end face processing apparatus capable of obtaining fashionable eyeglasses.

[0005]

According to a first aspect of the present invention, a bevel polishing grindstone having a slope substantially corresponding to a slope of a bevel mountain formed on an end surface of an eyeglass lens is provided. Is a method for processing an end surface of a spectacle lens in which the other slope of the bevel mountain remaining after the polishing and uneven polishing are polished.

[0006] The fact that a slope corresponding to the slope of the bevel mountain formed substantially on the end face of the spectacle lens means that the slope of the bevel mountain is 2
This is not limited to the case where two slopes are continuously provided at the top of the bevel mountain, but also includes the case where the two slopes are spatially separated. In addition, the slope corresponding to the slope of the mountain is not limited to only the slope of the mountain, but also includes a flat foot connected to the mountain. Therefore, the one slope and the other slope of the bevel mountain may include a foot connected to the mountain.

When the bevel is finished on the end surface of the spectacle lens, the slope of the bevel mountain remains opaque and white. Therefore, the slope of the bevel mountain is polished with a grindstone having a slope corresponding to the bevel mountain in a first step and a second step. In the first step, one slope of the grindstone is pressed against one slope of the bevel mountain to polish one slope of the bevel mountain. In the second step, the other slope of the bevel mountain and the uneven polishing remaining in the first step are polished using the other slope of the grindstone. At this time, the polishing is performed so that the vertex position of the bevel mountain after polishing is restored to the vertex position before polishing. When both slopes of Mt. Bevel are polished in this way, the remaining Mt. Therefore, even if the beveled surface of the spectacle lens protrudes from the thin rim of the metal frame, or the lower half of the spectacle lens is completely exposed as in the case of a Nylor type frame, the aesthetics can be maintained. In addition, since the beveled surface is mechanically mirror-finished using a grindstone, polishing can be performed in a short time and cost can be reduced.

According to a second aspect of the present invention, in a method for processing an end surface of a spectacle lens in which a bevel is finished on an end surface of the spectacle lens, a bevel polishing grindstone having a bevel groove having a shape corresponding to the bevel is used. The top position of the bevel peak on the end surface of the spectacle lens is the bottom position of the bevel groove on the grindstone (the deepest part of the groove)
The bevel groove on the back side of the spectacle lens end surface is polished by shifting to the back side of the spectacle lens, and then the spectacle lens is returned to the original position, and the top position of the bevel mountain on the end surface of the spectacle lens is set to the bevel groove of the grindstone. The end surface of the spectacle lens is mirror-finished by polishing the beveled end surface of the end surface of the spectacle lens and the uncut part of the end surface of the spectacle lens so as to be mirror-finished.

The margin of the back side of the spectacle lens end face to be polished first is not limited to the back side of the spectacle lens end face, but may include the front side of the spectacle lens end face.

When the top position of the bevel peak on the end surface of the spectacle lens is shifted toward the back side of the spectacle lens from the bottom position of the bevel groove of the grindstone, when the grindstone and the spectacle lens relatively approach, the back side of the spectacle lens is shifted. Since the front side of the spectacle lens hits the inclined surface on the same side as the back side of the spectacle lens on the grindstone surface, first, the allowance on the back side of the spectacle lens is polished.
Also, when the spectacle lens is returned to the original position and the top position of the bevel peak of the spectacle lens is matched with the bottom position of the bevel groove of the grindstone, the front side of the spectacle lens is now set on the grindstone before the back side of the spectacle lens. Since the surface hits the inclined surface on the same side as the front side of the spectacle lens, the front side of the spectacle lens and the remaining allowance are polished. By this polishing, the beveled surface remaining white becomes transparent like the front and back surfaces of the spectacle lens.

In the second aspect of the present invention, particularly when the spectacle lens is a hard and poorly cuttable lens such as polycarbonate, when polishing the front side of the spectacle lens end face and the remaining allowance, the spectacle lens end face is used. It is preferable that the top position of the bevel mountain is slightly displaced toward the surface side of the spectacle lens from the point of coincidence with the bottom position of the bevel groove of the grindstone so as to increase the pressure contact force on the grindstone surface. .

When the spectacle lens is a soft and easy-to-cut lens such as a diethylene glycol acryl carbonate plastic lens (hereinafter referred to as a DEC lens) of an acrylic resin, the surface side of the spectacle lens and the remaining allowance are polished. In this case, there is no problem in grinding the eyeglass lens by matching the top position of the bevel peak with the bottom position of the bevel groove of the grindstone. However, if the spectacle lens is a hard and poorly cuttable lens such as a polycarbonate lens, there is a strong problem in polishing because the bevel surface on the bevel mountain side of the spectacle lens has a strong contact with the grindstone surface. . Therefore, the amount of shift of the spectacle lens is corrected so that the top position of the bevel peak of the spectacle lens is slightly displaced toward the front side of the spectacle lens from the point of coincidence with the bottom position of the bevel groove of the grindstone, The contact with the surface is strengthened. In this way, by correcting the shift amount of the spectacle lens according to the material of the spectacle lens and adjusting the force applied to the whetstone surface, even when the spectacle lens is a hard and poorly cuttable lens, it is optimal. Mirror finish is possible. The second
In the invention, the correction value of the shift amount is zero.

In the first and second aspects of the present invention, it is preferable that the movement of the spectacle lens relative to the grindstone is performed by moving the spectacle lens. In the relative movement of the spectacle lens with respect to the grindstone, the grindstone may be moved. However, moving the spectacle lens as in the present invention simplifies the apparatus configuration. According to this, since the spectacle lens is moved, the existing technology can be used as it is, and the device structure can be simplified.

According to a third aspect of the present invention, there is provided the grinding wheel for bevel polishing according to the first or second aspect of the present invention, which is used for processing an end surface of a spectacle lens in which one surface is convex and the other surface is concave. In the axial direction of the surface, a bevel groove configured with an inclined surface having an inclination angle called the first angle with respect to a vertical line drawn on the axis of the grinding stone, and a bevel groove for polishing the bevel on the inclined surface,
A relief which is formed outside the bevel groove and is continuous with the inclined surface of the bevel groove, and is called a second angle with respect to a vertical line drawn on the axis of the whetstone, and has an inclination angle larger than the first angle. It is a whetstone having a surface.

A second corner is formed in a bevel shape. This is because in the case of a frame with a large (deep) eyebrow, such as a combination frame (a metal frame with an eyebrow made of plastic attached to the eyebrow), the eyebrow hits the horizontal surface of the end face other than the bevel. This is to form an escape.

In the third aspect, the width of the flank located on the concave side of the spectacle lens with respect to the bevel groove in the grindstone axis direction is set to the axis of the flank located on the convex side of the spectacle lens. Preferably, the width is wider than the width in the direction. If the width of the flank positioned on the convex side of the spectacle lens is wider than the width of the flank positioned on the concave side of the spectacle lens, it is possible to correspond to a strong lens having a thick end face of the spectacle lens.

According to a fourth aspect of the present invention, a rough grindstone for roughing the end face of the spectacle lens, a bevel finish grindstone for forming a bevel on the end face of the spectacle lens, and a polishing grindstone for mirror-finishing the end face of the spectacle lens are coaxial. Prepare integrally on the line,
The bevel finish grinding stone and the polished grindstone, on their surface, a bevel groove of a shape corresponding to the bevel,
The whetstone includes a flank formed on both sides of the bevel groove and a flat processing surface connected to the flank of the flank located on the back side of the spectacle lens. The bevel groove is a bevel-finished groove in a bevel-finished whetstone, and a bevel-polished groove in a polished whetstone. The flat machined surface is a flat polished surface for a beveled finish whetstone,
In the case of a polished stone, it is a flat polished surface.

When the end face of the spectacle lens is machined, the end face of the spectacle lens is rough-cut by sequentially moving the spectacle lens in the axial direction of the grindstone with a rough grindstone, a bevel finish grindstone, and a polished grindstone. A bevel is formed on the rough-cut surface, and the inclined surface of the formed bevel is mirror-finished, and these processes are performed in a series.

In the fourth aspect of the present invention, the diameter of each of the rough grinding wheel, the bevel finishing wheel, and the polishing wheel, which are integrally provided on the axis of the grinding wheel, is substantially constant, and the particle size of each grinding wheel is determined by their functions. Preferably, it is changed accordingly. Using this whetstone, rough the eyeglass lens end face,
When performing each of flat grinding, bevel finishing, and mirror finishing, since the grain size of each grinding wheel is changed according to the function of each grinding wheel, there is no need to substantially change the rotation of the grinding wheel,
The rotation control of the grindstone becomes easy.

When the whetstone described in the third and fourth inventions is used for processing the end face of the spectacle lens, the beveled surface can be mechanically polished, and the cost can be reduced at a lower cost as compared with the one which is manually buffed. The polishing process can be sped up, uniformity of finishing accuracy can be achieved, and fashionable glasses can be obtained.

[0021]

Embodiments of the present invention will be described below.

FIG. 3 is a perspective view of a main part of an internal structure of a so-called balling machine, which is an apparatus for processing an end surface of a spectacle lens for carrying out the method for processing an end surface of a spectacle lens according to the present invention. In FIG. 3, power is transmitted to a grinding wheel 1 which is a rotary cutting diamond wheel by a power transmission mechanism of a pulley 3 and a belt 4 by a rotating wheel motor (not shown). The grindstone 1 rotating via the spindle 5 is pressed against the spectacle lens 6 to cut the spectacle lens 6. The spectacle lens 6 is held at a predetermined position by a lens holding shaft 7 and a lens support shaft 8. The rotation of the chucking motor 9 is transmitted to the lens holding shaft 7 via the belt 10 and the pulley 11, and the lens holding shaft 7 can move in the axial direction by rotating the feed screw 12. Thereby, the spectacle lens 6 can be detached.

The rotation of the spectacle lens 6 is performed by the synchronous rotation of the lens holding shaft 7 and the lens support shaft 8. The lens holding shaft 7 and the lens supporting shaft 8 are composed of a lens rotating motor and a gear.
The interlocking shaft 16 is rotated by the pulleys 14 and 15, and is rotated via pulleys 19 by a power transmission mechanism of a pulley 17 provided at both ends of the interlocking shaft 16 and a belt 18 wound around the pulley 17. A homer for providing a lens pattern (not shown, the homer is attached to a position where the bearing 20 is provided) and an unprocessed round spectacle lens 6 are mounted on both ends of the lens support shaft 8. Lens support shaft 8
Are linked with the encoder 23 via the gears 21 and 22, whereby the rotation angle of the lens support shaft 8 is measured.

Reference numeral 24 denotes a carriage. The carriage 24 houses the motors 9, 13 and their associated power transmission mechanisms, the lens pressing shaft 7 and the lens supporting shaft 8. The spectacle lens 6 is arranged at the center of a recess formed in front of the carriage 24. The spectacle lens 6 has a carriage 24 with a slide shaft 25.
Descends by swinging around as shown by the arrow L1,
The carriage 24 is pressed against the grindstone 1 by its own weight and cut. The slide shaft 25 is supported rotatably and slidably in the axial direction by slide bearings 27 held on each of two bearing supports 26.

At the right end of the slide shaft 25 in the figure, a slide shaft
A bearing 32 is fitted so as to be rotatable relative to 25, and an arm 33 is fixed to the bearing 32 near its rear end. A belt 34 extends between the pulley 35 and the pulley 37 of the electromagnetic clutch 36 in parallel with the slide shaft 25. The rear end of the arm 33 is fixed to the belt 34 by a fixing plate 38. The electromagnetic clutch 36 is linked to an X-axis motor 41 via gears 39 and 40. By operating the X-axis motor 41 based on this structure, the slide shaft 25 and the carriage 24 move in the axial direction of the slide shaft 25, that is, in the X-axis direction (horizontal direction) as indicated by an arrow L2.

A holding table 42 is fixed to the front end of the arm 33,
A copying plate 43 having a surface having the same radius of curvature as the grindstone 1 is fixed to the holding table 42 (however, when the copying plate is a patternless edger and has a configuration like a bearing, the same curvature is not required). . Since the arm 33 moves as described above, a roller 45 is provided between the lifting table 44 of the support mechanism provided below the supporting table 42 to support the holding table 42 and the holding table 42, and the roller 45 is provided on the lifting table 44. The holding table 42 slides via the roller 45.

In FIG. 3, reference numeral 49 denotes a Y-axis motor in the Y-axis direction (vertical direction) as indicated by an arrow L3, and the elevator 44 is moved up and down in the vertical direction by operating the Y-axis motor 49. be able to. When the elevator 44 is moved up and down, the carriage 24 can be moved around the slide shaft 25 via the arm 33 and the slide shaft 25 as shown by an arrow L1.

In the above, the carriage 24 is an X-axis motor
It is moved in the horizontal direction by 41 and moved in the vertical direction by the Y-axis motor 49. When the carriage 24 moves in the horizontal or vertical direction in this manner, the spectacle lens 6 to be processed is moved.
Can be arbitrarily changed in the horizontal direction, and the spectacle lens 6 can be pressed against and separated from the grindstone 1.

The grinding wheel 1 has a cylindrical shape, and its peripheral surface is formed as a lens cutting surface. A part of the peripheral surface for cutting of the grinding wheel 1 is a cutting surface for roughing the lens, and a V-shaped bevel groove 1a is formed following the cutting surface for rough cutting of the lens. The bevel groove 1a is a portion used when forming a bevel on the lens end surface after roughing. Furthermore, a V-shaped bevel groove 1b used for mirror-polishing the lens end surface after the bevel is formed is formed in another portion.

Since the above-mentioned ball milling machine can automatically trace the shape of the frame as described later,
The Y-axis motor 49 can be driven independently without using a profiler 43 (pattern). That is, the present ball-sliding machine can be used both as a patternless machine and as a pattern machine.

FIG. 4 shows a lens periphery measuring device 53 for measuring the lens peripheral thickness of the peripheral portion of the spectacle lens 6, and shows a state in which an opening / closing door 64 of the measuring instrument storage chamber 63 is opened. It is a perspective view. In FIG. 3, the lens periphery measuring device 53 is indicated by an imaginary line (two-dot chain line) at a position on the front side of the front recess of the carriage 24 and above the grindstone 1. The first and second tracing styluses 65 and 66 abutting on the front and back surfaces of the spectacle lens having a convex surface on one side and a concave surface on the opposite side are respectively turned at the upper end surface of a shaft 62 that moves up and down in the storage chamber 63. It is supported by movable arms 72 and 73. In the drawing, each arm is in the retracted position, and the state where the tracing styluses 65 and 66 are stored in the measuring device storage chamber 63 is shown. In this ball mill, since the measuring device is arranged outside the carriage 24, the lens periphery measuring device 5
No. 3 can avoid the influence of vibration at the time of lens grinding.

FIG. 5 is a perspective view showing the internal mechanism of the measuring instrument storage chamber 63. Interlocking shaft 7 between left and right of base 61
A belt 80 is hung on two pulleys 79 on the left and right sides of the interlocking shaft 77, although the left side is omitted. The box 78 suspended by two constant load springs 81 (the left side is not shown) on the front surface of the base 61 is configured to move up and down.

A shaft 71 that supports the tracing styluses 65 and 66 at the upper end surface is fixed to the upper plate of the box 78. Here, the rotational positions of the left and right arms 72 and 73 of the tracing styluses 65 and 66 are controlled by central shafts that rotate independently within the shaft 71. A motor (not shown) for rotating the arms 72 and 73 between the measurement position and the retracted position inside the vertical movement box 78, and detects the amount of movement of the arms 72 and 73 in the lens axis direction. An encoder (not shown), a solenoid (not shown) having an operation piece (amateur) for opening the arms 72 and 73 to a predetermined angle at a measurement position, and the like are arranged. A rotatable feeler 7 is provided at the tip of the arms 72, 66 of the measuring elements 65, 66.
4, 75 are provided so as to come into contact with the spectacle lens 6.

FIG. 6 shows a configuration diagram of the grinding wheel 1 described above. The grinding wheel 1 of the ball mill is a rough grinding stone 8 for rough cutting formed in a cylindrical shape.
1, a bevel is formed on the lens end surface after roughing or a bevel-finished grindstone 82 for bevel grinding for performing flattening, and the beveled surface after the beveling and the lens end surface after flattening are mirror-finished. The three grindstones with the polish grindstone 83 are integrally provided on the same axis, and are fixed to the spindle 5 (see FIG. 3) by fixing screws.

The bevel finishing whetstone 82 and the polishing whetstone 8
A V-shaped beveled groove 82a and a beveled polished groove 83a are formed on each circumferential surface of No.3. Also, the circumferential surface of each of the beveled finish grooves 82a of the beveled finish grindstone 82 and the polished grindstone 83 and the respective grindstones 82 and 83 located on the left and right of the beveled finish groove 83a is narrow on the left side, which is the convex side of the spectacle lens, and on the concave side. The right side is wider. If the width of the flank located on the concave side of the spectacle lens is wider than the width of the flank located on the convex side of the spectacle lens, it is possible to correspond to a strong lens having a thick end face of the spectacle lens. The widened right circumferential surface constitutes a flat finishing surface 82c and a flat polishing surface 83c, respectively. The flat grinding process for finishing is performed for the bevel finishing wheel 82, and the flat polishing process is performed for the polishing wheel 83. Mirror finishing after the grinding process can be performed respectively.

The left and right circumferential surfaces of the bevel-finished groove 82a and the bevel-polished groove 83a are not horizontal planes but are inclined surfaces whose diameters become slightly larger in the left and right directions (axial directions). This is a combination frame (plastic eyebrows are attached to the metal frame eyebrows)
In the case of a frame having a large (deep) eyebrow as in the above, the eyebrow hits the horizontal plane of the end face other than the bevel, so that a relief is formed. Then, the widened right-side flat finishing surface 82c and the right-side flat polishing surface 83c have a small inclination angle (from the position shown by the dotted line) on the way and approach the horizontal plane (this point will be described later).

A rough whetstone 81 (mesh: about # 50 to 150), a beveled whetstone 82 (mesh: # 400 to # 6)
00), polished whetstone 83 (mesh: # 100
Rather than substantially changing the rotation of the grinding wheel in each of the steps of roughing, beveling, flattening, and mirror polishing, the grinding wheel diameter is constant and controlled by changing the particle size of the grinding wheel. I have. Although only one type of the bevel finishing wheel 82 and the polishing wheel 83 is shown in the illustrated example, since there are a plurality of types of bevels, there are also a plurality of types of these whetstones.

FIG. 7 shows a V-shaped bevel groove 1a of the grindstone 1 common to the bevel finish grindstone 82 and the polish grindstone 83, and a detailed view of a main part of a peripheral end surface thereof. The bevel groove 1a and its peripheral end face are constituted by two kinds of angles called a first angle θ and a second angle φ. The first angle θ is two opposite inclined surfaces 1b of a V-shaped bevel groove 1a corresponding to the bevel of the spectacle lens,
An angle θ ₁ formed between 1c and a vertical line L drawn on the axis of the grinding wheel ₁ ,
θ ₂ . The second angle φ is connected to the V-shaped bevel groove 1a, and the left and right inclined surfaces 1 located outside the bevel groove 1a.
The angles φ ₁ and φ ₂ between d and 1e and the vertical line L are referred to. 2
The angle φ is formed for escape of the eyebrows as described above. In FIG. 6, the flank 8 formed at the second corner
2b and 83b indicate boundaries with imaginary lines.

As shown in FIG. 8, in order to cut the end face of the spectacle lens 6 using a grindstone 1 having a rough grindstone 81, a beveled finish grindstone 82, and a polished grindstone 83 continuously on the same axis, a lens presser is used. the eyeglass lens 6 sandwiched between the shaft 7 and the lens support shaft 8 in pressure contact with the grindstone 1, gradually shifted from left to right as indicated by the X-axis direction of the right arrow X _R. Thus, roughing, beveling, and polishing are sequentially performed. In the case of lapping without forming a bevel, after roughing, the lapping surface 82c and the polished polished surface 83c are successively pressed against the beveled groove 82a. Since the spectacle lens 6 only needs to be pressed against the grindstone 1 relatively, the grindstone 1 may be pressed against the spectacle lens 6. In each of the automatic bevel, forced bevel, and flat sliding modes described later, the measurement of the entire edge position of the spectacle lens 6 is performed as follows.
As shown in FIG. 8, the lens periphery measuring device 53 (see FIG. 5)
By contacting the feelers 74 and 75 with the spectacle lens 6.

FIG. 9 shows the configuration of an electric apparatus for executing the method of processing the end surface of the spectacle lens 6. In FIG. 9, reference numeral 100 denotes an operation control circuit unit which executes various operations for end face processing and performs control using data obtained by the operation, and is configured by a computer. As an input unit, a lens edge position measuring unit 121 and a shape data input unit 120 are provided. Further, an operation panel 110 is provided, and when the operation unit 112 of the operation panel 110 is operated, roughing, trial slicing, finishing slicing, polishing, and the like are executed according to the operation content. Operation information such as set values is input to the arithmetic and control circuit unit 100 from the input unit 111 of the operation panel 110.

Bevel processing and bevel mirror processing (hereinafter referred to as “bevel processing”)
In the beveling, various kinds of data are required for the spectacle lens 6 and its end face as described above, but the shape data is temporarily stored in the shape data memory 104 of the arithmetic and control circuit unit 100 from the shape data input unit 120. You. The stored shape data is read out to the beveling data calculation unit 103, and is calculated together with the lens edge position data input from the lens edge position measurement unit 121. The calculation result, the beveling data, is a bevel processing data memory. It is stored in 102. Here, the beveling data memory 102 is a memory for storing control data for beveling to be applied to the X-axis motor 41. The control data differs depending on the type of the bevel. When the grindstone has a plurality of bevels (large bevel and small bevel), the bevel position can be selectively driven by moving in the X-axis direction based on the control data. For example, the types of bevels are different between a plastic frame and a metal frame, and a large bevel is formed on a plastic grindstone and a small bevel is formed on a metal grindstone.

The arithmetic control circuit section 100 is provided with a processing correction value memory 101 for giving control data to the Y-axis motor 49. The processing correction value memory 101 is a memory for storing correction data required according to the type of spectacle lens and the material of the frame. The correction data differs depending on whether the type of spectacle lens is glass, plastic lens, or whether the cutting pressure needs to be adjusted.
Further, in the case of a plastic lens, different cutting data is required because the machinability differs depending on the type of plastic. In addition, depending on the material of the frame, such as metal, cell, no edge, etc., the method of beveling differs, and the diameter of the bevel mirror-finished surface varies accordingly. Therefore, it is necessary to prepare correction data according to them.

The control data from the arithmetic and control circuit unit 100 is supplied to a grinding wheel rotation motor 123 via a grinding wheel rotation motor control unit 122 and to a lens rotation motor 13 via a lens rotation drive control unit 124, respectively. Can be
In addition, the Y-axis motor 49 via the Y-axis drive control unit 125, the X-axis motor 41 via the X-axis drive control unit 126, and the lens edge measurement via the lens edge measurement unit drive control unit 127. To the motors 128 for use.

Next, with reference to the flow chart of FIG. 10, the procedure of beveling including bevel mirror finishing, starting from input of shape data, will be described.

The eyeglasses store traces the eyeglasses frame selected by the customer. After tracing is started, the shape data input unit 12
From 0, the measured shape data is input to the arithmetic and control circuit unit 100 (step 201). Specifically, a frame trace of a spectacle frame, a rimless type pattern trace without a spectacle frame, and a rim lens trace of a spectacle lens are performed, and the obtained shape data is input through the shape data input unit 120 to the shape data. Input to the memory 104.

Subsequently, layout data of the spectacle lens is input (step 202). To input layout data, the following processing conditions need to be set. As the processing conditions, for example, selection of cutting (glass, plastic, polycarbonate, acrylic), frame material (cell,
Metal), frame PD (pupil distance (FPD, D
BL)) input, PD (binocular, monocular) input, horizontal eccentricity X input, vertical eccentricity Y (Y, EPH, BXH) input, astigmatic axis Ax input, finish size input, and the like.

Next, a processing mode is set (step 2).
03). As described above, the machining mode includes three types of cutting, namely, automatic beveling, forced beveling, and flattening, and the desired mode is set. In addition, mirror finishing can be set for each. If you select Auto, the computer automatically determines the position where you want to bevel on the end face of the spectacle lens. The position where the bevel is raised can be changed in a predetermined procedure. If you select Force, you can place a bevel at any position. When flat sliding is selected, flat sliding processing that does not make a bevel can be performed.

After the processing mode is set ((step 203)), the process waits until the processing start button is pressed from the operation panel 110 (step 204). When the processing is started, the lens edge measuring motor 128 is driven to operate the eyeglass lens. Edge tracing (step 205) This edge tracing is performed by the lens edge measuring device 53 shown in Fig. 4 and Fig. 5. Here, in all processing modes (automatic, forced, flat sliding). The measured value is input from the lens edge position measurement unit 121 to the bevel processing data calculation unit 103 of the arithmetic and control circuit unit 100. The bevel to which the lens edge position measurement value and the shape data are added. The processing data calculation unit 103 calculates the bevel processing data by a known method (step 20).
6).

Next, based on the beveling data obtained by the calculation, the end surface of the spectacle lens is processed to fit the spectacle lens 6 into the rim of the spectacle frame. For this purpose, first, the end face of the spectacle lens 6 is rough-processed using the rough whetstone 81 (step 207). That is, the spectacle lens 6 is arranged at a predetermined position shown in FIG. 3 by operating the chucking motor 9 and the lens support shaft 8 and the lens pressing shaft 7. The X-axis motor 41 and the Y-axis motor 49 are operated based on the trace data to move the spectacle lens 6 to the rough whetstone 8 of the whetstone 1.
A required load is applied to 1 to bring it into pressure contact. The grinding wheel rotation motor 123 is driven by the grinding wheel rotation motor control unit 122 so that the grinding wheel 1
Is rotated, and the lens rotating motor 13 is driven to rotate the spectacle lens 6. Thus, the end surface of the spectacle lens 6 is roughened based on the trace data.

Next, the beveled surface is processed (step 2).
08). Finishing is performed while giving information on the peak position of the bevel and the bevel curve. In the bevel finishing process, in each part of the lens end surface, the vertex position of the bevel peak on the lens end surface is the ratio of the distance between each of the front edge and the rear surface edge and the vertex of the bevel peak in the end face width (lens thickness) direction. Is maintained at the initially selected and set constant value. In order to make a bevel on the end surface of the spectacle lens, it is necessary to determine a bevel curve, but a method of obtaining the bevel curve will not be described in detail here.

In the beveled surface machining, the X-axis motor 41 is controlled and driven based on the beveling data calculated in step 206 so that the vertex position of the beveled ridge after machining and the deepest portion of the bevel groove of the grindstone 1 match. There is a need to. Therefore, the Y-axis motor 49 is driven to release the spectacle lens 6 from the grindstone 1 by a predetermined amount in order to once separate the spectacle lens 6 having undergone the roughing in step 207 from the grindstone 1.

Next, the X-axis motor 41 is rotated by a fixed amount to move the spectacle lens 6 to the position of the beveling grindstone. Thereafter, the carriage 24 is lowered by driving the Y-axis motor 49, and the spectacle lens 6 is pressed against the grindstone 1. The grindstone rotation motor is driven to rotate the grindstone 1, and the lens motor 13 is driven to rotate the spectacle lens 6. The X-axis motor 41 is controlled and driven based on the bevel processing data calculated in step 206. Thereby, beveling is performed.

After finishing the beveled surface processing, the beveled lens is mirror-polished so as to make the white and opaque beveled surface transparent. At this time, if the two slopes of the bevel surface are simultaneously processed with the polished grindstone 83 having the bevel groove corresponding to the bevel, a difference occurs in the mirror surface finish of both the bevel slopes. This is because the vertex position of the bevel peak is curved on the edge thickness along the circumferential direction, and the convex side of the lens strongly hits the mirror grindstone during polishing. Therefore, in this embodiment, the concave-side bevel surface and the convex-side bevel surface are controlled in two steps by controlling the finished lens in the X-axis direction so that there is no difference in the finished state of the two beveled surfaces and the degree of the mirror surface. Bevel mirror finishing (bevel polishing) is performed separately (steps 209 and 210).

However, when the bevel polish is performed twice in this manner, the finished lens is
A lens that is soft and has good machinability like a lens and a lens that is hard and has poor machinability like polycarbonate are X
It is necessary to make a slight difference in axis control. (A) Bevel polish of a plastic or acrylic lens (FIG. 1) As correction data for a plastic or acrylic lens, “0.0 mm” is stored in advance in the processing correction value memory 101 of the arithmetic and control circuit unit 100. I have. Finish lens 7
6 is 0.1 mm. First, the concave surface of the finished lens 76 is beveled (step 2).
09).

Starting cutting The X-axis motor 41 is driven so that the bevel apex position 176 of the finishing lens 76 is 0.3 mm to the right of the bevel groove center position (bottom position of the bevel groove) 183 of the polishing grindstone 83.
The finishing lens 76 is moved rightward to the concave side of the finishing lens 76 so as to shift (FIG. 1A). Therefore, at the start of cutting, the bevel apex position 176 does not match the bevel groove center position.

First Cutting The Y-axis motor 49 is driven to lower the carriage 24 in the direction of a white arrow, and in the first cutting, the finishing lens 76 is lowered to the position of the provisional size 174, and the cutting allowance 175 A cut-off portion (hatched portion) 175a on the concave side of the finishing lens 76 is cut (FIG. 1B). At this time, a part of the margin on the convex side of the finished lens 76 is also cut.
Next, the convex side bevel mirror processing is performed (step 21).
0).

The second cutting X-axis motor 41 is driven to return the bevel cutting position by 0.3 mm as shown by the white left arrow direction, and the bevel apex position 1
76 is matched with the bevel groove center position. The Y-axis motor 49 is driven to lower the finishing lens 76 in the white arrow direction to the finish size position 173, and the finished lens 7
6 and the remaining portion 175b on the convex side and the remaining polishing unevenness are cut (FIG. 1C).

End of Cutting The Y-axis motor 49 is driven to raise the carriage 24 as shown by the white arrow, and the lens 86 is separated from the grindstone 1.
In this way, a mirror lens 86 whose bevel surface is mirror-finished is completed (FIG. 1D). (B) Bevel polish of a polycarbonate finish lens (Fig. 2) As the correction data for a polycarbonate lens, "-
“0.1 mm” is stored in the processing correction value memory 101 of the arithmetic and control circuit unit 100 in advance.

The start of cutting is the same as (A) of the bevel polish cutting method described above.

The first cutting is the same as (A) of the bevel polishing cutting method described above.

The second cutting X-axis motor 41 is driven to shift the bevel apex position 176 of the finishing lens 76 to the left by 0.1 mm from the bevel groove center position 183 of the polishing grindstone 83 to the left side by 0.1 mm. Then, the finishing lens 76 is moved in the direction of the white left arrow to increase the pressing force against the polishing grindstone 83. Then, the Y-axis motor 49 is driven to lower the finishing lens 76 to the finish size position 173 in the direction of the white arrow. This effectively cuts off the margin 175b on the convex side of the finished lens 76 and the remaining polishing unevenness (FIG. 2).

Finish of cutting The mirror finish is the same as (A).

As described above, in the bevel mirror processing of the embodiment, as described in the above (A) and (B), the two bevel surfaces are not polished at the same time, but the concave bevel surface and the convex bevel surface are not polished. Is polished twice, and at this time, the control of the finished lens in the X-axis direction is performed so as not to leave a margin or to damage the bevel position. However, high-precision mechanical polishing can be performed without leaving uncut portions. As a result, the beveled surface remaining white can be made transparent.

In the above embodiment, of the two beveled surfaces, the concave side is polished first and the convex side is polished later when mirror-finished. In the case of the finished lens (normal meniscus lens) shown in the figure, the vertex of the bevel is deviated to the convex side in the edge thickness direction, and there is a flat portion protruding from the rim of the frame on the concave side of the bevel surface. If you do not grind this flat part first,
This is because polishing residue occurs at the edge of the beveled surface on the convex side.

As described above, a cylindrical grindstone called a diamond wheel has a bevel finish grindstone and a polished grindstone, a bevel groove for forming a bevel or a bevel mirror surface on an end face of an eyeglass lens, and an end face of an eyeglass lens. A flat finishing surface for flattening.
More specifically, as shown in FIG.
A groove bevel 301 for beveling having a predetermined angle referred to as a first angle with respect to the grinding wheel axis direction, and a predetermined second angle referred to as a second angle smaller than the first angle with respect to the axial direction and continuous with the groove slope 301 Relief surface 30 for the eyebrow of an angled frame
2 and a flat finishing surface 303 for flat finishing which is continuous with the flank surface 302 and is parallel to the axial direction. The slope is not continuous at a boundary K (a dashed line that is a virtual line) between the flank surface 302 and the flat finishing surface 303.

Therefore, if the spectacle lens 6 is shifted to the left in the X-axis direction beyond the boundary K during the flattening process, the end face of the spectacle lens 6 will straddle the boundary K, and will be in contact with the end face 6a of the spectacle lens 6. K streaks. If streaks are formed on the end face of the spectacle lens 6, the finishing accuracy will be reduced and uneven,
It is not preferable in terms of fashion.

In order to solve this inconvenience, a sufficient margin is provided for the length of the flat finishing surface 303 in the axial direction. I did not exceed K. However, as a result, there is a problem that the grindstone 1 is enlarged in the axial direction.

The embodiment described below solves this problem. In the case of flat finishing or mirror finishing performed after flat finishing (hereinafter simply referred to as flat finishing), in order to prevent the end face of the spectacle lens from having streaks, a conventional flat finished surface that has been horizontal is used. In order to make it common with the second angle forming the flank, a certain angle is formed with respect to the axial direction so as to prevent streaks at the boundary. Here, the words of the 1st supplementary angle to the 2nd supplementary angle and the 3rd supplementary angle corresponding to the 1st to 2nd corners are defined.

As shown in FIG. 6, the grindstone 1 includes a rough grindstone 81, a beveled finish grindstone 82, and a polished grindstone 83 with a common axis. Among these, bevel finish whetstone 8
12 and the polishing grindstone 83, in common, as shown in FIG. 12, in the axial direction S of the circumferential surface of the grindstone, the groove slope 301 for beveling having the first supplementary angle α with respect to the axial direction S, A flank surface 302 for the eyebrows of the frame which is continuous with the groove slope 301 and has a second supplementary angle β smaller than the first supplementary angle α with respect to the axial direction S, and a flattening process continuous with the flank surface 302 And a flat finishing surface 303. Then, the flat finishing surface 303 has a third supplementary angle γ smaller than the second supplementary angle β of the flank surface 302 with respect to the axial direction S of the grindstone 300. The flattening process is, in principle, cut on a horizontal plane.
However, if the inclination angle is small, there is no problem even if cutting is performed on the inclined surface. Therefore, the flat finishing surface 303 inclined at the third supplementary angle γ smaller than the second supplementary angle β is formed. This flank 302
The boundary K between the surface and the flat finishing surface 303 is the boundary K.

Specifically, assuming that the second supplementary angle β is 4 ° with respect to the axial direction S, the third supplementary angle γ of the flat finishing surface 303 is also 2 ° with respect to the axial direction S, and the second supplementary angle β is the second supplementary angle β. Angle β and 3
The angle difference from the supplementary angle γ is small. With such a small angle difference, even if the end surface of the spectacle lens protrudes from the boundary K, the boundary line is not substantially formed on the end surface of the spectacle lens.

By the way, the angle difference between the flank and the polished surface is made small so that the inclination angle at the boundary between the flank and the polished surface is made continuous as much as possible, so that the end surface of the spectacle lens is Even if the boundary is not streaked, generation of the streak cannot be completely avoided as long as the boundary has an angle.
However, in this regard, when the flattening process is performed, if the position of the spectacle lens in the X-axis direction is controlled so that the vertex of the convex side end surface of the spectacle lens does not exceed the boundary, the flattened finish surface is reduced. Even if an inclination angle is not provided, a horizontal plane may be used as before.

Further, as described above, even if the end surface of the spectacle lens is flattened with the flattened surface common to the second supplementary angle forming the flank, the width of the flattened surface does not have a margin. There is no change in the point of addition, so only as much as you can afford
The width of the grindstone 1 is increased, and as a result, the size of the rubbing machine is also increased. However, also in this regard, if the X-axis control is performed so that the spectacle lens does not cross the boundary and always touches the boundary,
There is no need to allow extra width for the whetstone.

An embodiment in consideration of the above points will be described with reference to a polishing grindstone 320 shown in FIG.
In the same figure, reference numeral 311 denotes a groove slope of the bevel-polished groove 310, 312 denotes a flank, and a flat polished surface 313.
Is left with the third supplementary angle γ described above.

The X-axis motor 41 is driven to move the carriage 24 in the X-axis direction, and as shown in FIG.
A grinding stone 320 indicating the vertex A of the convex side end surface 6a of FIG.
To the point K on the boundary of. Next, the Y-axis motor 49 is driven to lower the carriage 24, and the spectacle lens 6 is pressed against the grindstone 320 (FIG. 13A). In this state, flattening is performed up to the position of the finished surface 6b indicated by the imaginary line.

In the process of flattening, if the processing is performed while the position of the spectacle lens 6 in the X-axis direction is fixed, the boundary K of the grindstone 320 moves on an imaginary line,
In the finished surface 6b, the boundary K is defined by an intersection C between the finished surface 6b and the surface of the spectacle lens, as shown by an end surface 6a of the spectacle lens 6.
Get inside. In order to avoid this, movement control of the spectacle lens 6 to the right in the X-axis direction by the X-axis motor 41 is always performed. As shown in FIG.
The vertex A of the convex side end surface of the spectacle lens 6 where the convex surface and the end surface intersect with each other is controlled so that the vertex A is always pressed against the boundary K of the flat polished surface 313 of the beveling grindstone 320. Control is performed so that point B where 6b intersects the convex side surface is at the boundary position.

As described above, the vertex A of the convex side end surface of the spectacle lens 6 is the boundary K of the flat polished surface 313 of the grindstone 320.
When the position of the spectacle lens 6 in the X-axis direction is controlled so that the spectacle lens 6 is constantly pressed against the lens, the spectacle lens 6 does not cross the boundary K, and thus the end face of the spectacle lens 6 is not streaked by the boundary K. Also, since the vertex A of the convex side end surface is always controlled to match the boundary K, the plane 31 having an extra length is controlled.
3 becomes unnecessary. As a result, the width of the grindstone 320 can be reduced.

The width reduction of the above-mentioned polished grindstone can be similarly applied to the case of the beveled finish grindstone.

More specifically, the width of the flat work surface (flat finished surface, flat polished surface), which was 24 mm in the past, was shortened to 20 mm for the finishing whetstone and 20 mm for the polishing whetstone, including the beveled portion. Was completed.

According to the above-described embodiment, even if the width of the grindstone does not have a sufficient margin, no border line is formed on the end surface of the spectacle lens, and the finishing accuracy of the end surface processing of the spectacle lens becomes uniform. Further, since the width of the grindstone can be reduced, the polish grindstone 83 can be additionally provided without greatly increasing the grindstone width.

In the above-described embodiment, the X-axis is controlled so that the vertex of the convex side end surface always coincides with the boundary K. However, the control is free within the flat polished surface 313, but the control is free. Even if the control is performed so as not to exceed, the boundary K can be prevented from being streaked. Various motors used in the embodiments are preferably stepping motors. In the embodiments, the minus lens has been described. The present invention can be similarly applied to a plus lens.

[0081]

According to the first aspect of the present invention, the bevel mountain is polished in two steps so that there is no uncut portion, so that mechanical polishing using a grindstone can be easily realized. In addition, since mirror surface processing using a grindstone becomes possible, the processing speed can be increased and uniformity of finishing accuracy can be achieved as compared with manual buffing or the like. Furthermore, since the beveled surface of the spectacle lens can also maintain aesthetics, fashionable spectacles can be realized.

According to the second aspect of the present invention, the beveled surface on the back side and the beveled surface on the front side of the spectacle lens are cut in two steps from the top of the bevel of the spectacle lens. Therefore, the bevel can be mirror-polished while maintaining the finished shape of the bevel and the top position of the bevel.

According to the third aspect of the present invention, the flank having a second angle larger than the first angle, which is the groove slope angle, is formed outside the bevel groove on the grindstone surface, so that the eyebrow portion of the metal frame is beveled. Since it does not hit the peripheral surface, the eyebrow can be effectively attached to the metal frame.

According to the fourth aspect of the present invention, it is possible to perform a series of steps from roughing to beveling to mirror finishing of the beveled surface with one grindstone.

[Brief description of the drawings]

FIG. 1 is a process chart of a bevel polishing cutting method according to an embodiment.

FIG. 2 is a main part process view of a bevel polish cutting method according to another embodiment.

FIG. 3 is a perspective view showing a main structure of an eyeglass lens end face processing apparatus according to an embodiment;

FIG. 4 is a perspective view of the lens periphery measuring device according to the embodiment.

FIG. 5 is a perspective view showing the internal structure of the lens periphery measuring device according to the embodiment.

FIG. 6 is a configuration diagram of a grindstone according to the embodiment.

FIG. 7 is a main part configuration diagram of a bevel grinding wheel according to the embodiment.

FIG. 8 is an explanatory diagram of end face processing and lens measurement of the spectacle lens according to the embodiment.

FIG. 9 is a configuration diagram of an electrical control system for performing the eyeglass lens end face processing method of the embodiment.

FIG. 10 is a flowchart illustrating a method of processing an end surface of a spectacle lens according to an embodiment.

FIG. 11 is an explanatory view showing a conventional flattening method.

FIG. 12 is an explanatory view of a main part of a grindstone used in the flattening process of the embodiment.

FIG. 13 is a process diagram illustrating a flattening method according to the embodiment.

[Explanation of symbols]

 76 Finished lens 83 Polished whetstone 83a Beveled polish groove 86 Mirror surface lens 173 Finished size 174 Temporary size 176 Bevel vertex position 183 Bevel groove center position 175

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[Procedure amendment]

[Submission date] October 8, 1999 (1999.10.
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Patent application title: End-face processing method for spectacle lens

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing an end surface of a spectacle lens, and more particularly, to a mirror surface processing for an end surface after a bevel finish.
It is about .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

An object of the present invention is to solve the above-mentioned problems of the prior art by mechanically polishing a beveled surface in two steps, thereby increasing the processing speed of polishing and uniformity of finishing accuracy. Accordingly, it is an object of the present invention to provide a method for processing an end surface of a spectacle lens capable of obtaining fashionable spectacles.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

When the bevel is finished on the end surface of the spectacle lens, the slope of the bevel mountain remains opaque and white. Therefore, the slope of the bevel mountain is polished with a grindstone having a slope corresponding to the bevel mountain in a first step and a second step. In the first step, one slope of the grindstone is pressed against one slope of the bevel mountain to polish one slope of the bevel mountain. In the second step, the other slope of the bevel mountain and the uneven polishing remaining in the first step are polished using the other slope of the grindstone. At this time, the polishing is performed so that the vertex position of the bevel mountain after polishing is restored to the vertex position before polishing. When both slopes of Mt. Bevel are polished in this way, the remaining Mt. Therefore, even if the beveled surface of the spectacle lens protrudes from the thin rim of the metal frame, or the lower half of the spectacle lens is completely exposed as in the case of a Nylor type frame, the aesthetics can be maintained. In addition, since the beveled surface is mechanically mirror-finished using a grindstone, polishing can be performed in a short time and cost can be reduced. First
In the invention, the whetstone has a convex surface on one side and an opposite surface on the other side.
Used for processing the end surface of concave spectacle lens
A vertical line drawn along the axis of the whetstone in the direction of the axis of the whetstone
Consists of an inclined surface with an angle of inclination called the No. 1 angle
And a bevel groove for polishing the bevel on the inclined surface;
Outside of the bevel groove and continuous with the slope of the bevel groove
No. 2 with respect to the vertical line formed on the axis of the whetstone
An escape that has a larger angle of inclination than the first angle
It is preferable to have an angled surface. The second corner of the bevel shape
It is formed. This is a combination frame (meta
A plastic eyebrow is attached to the eyebrow of the frame.
Frame) with a large (deep) eyebrow like
The eyebrows hit the horizontal surface of the end face other than the
This is to form a ridge. In this way, on the whetstone surface,
No. 2 that is larger than No. 1 angle which is the groove slope angle outside the groove
Form a flared surface with corners, so that the metal frame
So that it does not hit the edge of the
The eyebrow can be effectively attached to the system. First invention
The concave surface of the spectacle lens with respect to the bevel groove
The width of the flank located on the side in the axial direction of the grindstone is
Grinding wheel axis direction of the flank located on the convex side of the mirror lens
It is preferable to make the width wider than the width. Convex surface of spectacle lens
The width of the flank positioned on the side
If the width of the flank is wider than
It can correspond to a thick intensity lens.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Deleted

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Deleted

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Deleted

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

Further, the present invention is preferably used in the first and second inventions.
Examples of the grindstone include, for example, a rough grindstone for rough-cutting the end face of the spectacle lens, a bevel finish grindstone for forming a bevel on the end face of the spectacle lens, and a polished grindstone for mirror-finishing the endface of the spectacle lens on the same axis. Integrally prepared,
The bevel finish grinding stone and the polished grindstone, on their surface, a bevel groove of a shape corresponding to the bevel,
The whetstone includes a flank formed on both sides of the bevel groove and a flat processing surface connected to the flank of the flank located on the back side of the spectacle lens. The bevel groove is a bevel-finished groove in a bevel-finished whetstone, and a bevel-polished groove in a polished whetstone. The flat machined surface is a flat polished surface for a beveled finish whetstone,
In the case of a polished stone, it is a flat polished surface.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Deleted

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Deleted

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction contents]

[0048] After the processing mode setting (step 203),
The process waits until the processing start button is pressed from the operation panel 110 (step 204). When the processing is started, the lens edge measuring motor 128 is driven to trace the edge (peripheral edge) of the eyeglass lens (step 205). This edge tracing is performed by the lens periphery measuring device 53 shown in FIGS. 4 and 5 described above. Here all processing modes (auto,
(Forced, flat sliding) to measure the edge position of the entire circumference of the lens. The measured value is input from the lens edge position measurement unit 121 to the bevel processing data calculation unit 103 of the calculation control circuit unit 100. The beveling data calculation unit 103 to which the lens edge position measurement value and the shape data are added calculates the beveling data by a known method (step 20).
6).

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0081

[Correction method] Change

[Correction contents]

[0081]

According to the first aspect of the present invention, the bevel mountain is polished in two steps so that there is no uncut portion, so that mechanical polishing using a grindstone can be easily realized. In addition, since mirror surface processing using a grindstone becomes possible, the processing speed can be increased and uniformity of finishing accuracy can be achieved as compared with manual buffing or the like. Furthermore, since the beveled surface of the spectacle lens can also maintain aesthetics, fashionable spectacles can be realized.

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0083

[Correction method] Deleted

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Deleted

Claims (9)

[Claims] 1. A bevel polishing grindstone having a slope substantially corresponding to a slope of a bevel mountain formed on an end face of an eyeglass lens, and polishing one slope of the bevel mountain. An end surface processing method for an eyeglass lens, wherein the other slope of the bevel mountain is polished. 2. A method for processing an end surface of a spectacle lens in which a bevel is finished on an end surface of the spectacle lens, wherein a bevel polishing grindstone having a bevel groove having a shape corresponding to the bevel is used. The top position of the bevel peak is shifted to the back side of the spectacle lens from the bottom position of the bevel groove of the grindstone to polish the allowance of the end surface of the spectacle lens on the back side of the bevel mountain, and then the spectacle lens is returned to the original position and the spectacles The top position of the bevel mountain on the lens end face is matched with the bottom position of the bevel groove of the grinding wheel, the bevel mountain surface side of the eyeglass lens end face is polished, and the remaining portion is polished, and the bevel end face of the eyeglass lens is mirror-finished. End surface processing method for spectacle lenses as described above. 3. When polishing the surface side of the end surface of the spectacle lens and the remaining allowance, the top position of the bevel mountain on the end surface of the spectacle lens is slightly smaller than the point of coincidence with the bottom position of the bevel groove of the grindstone. 3. The end face processing method for an eyeglass lens according to claim 2, wherein the pressing force against the whetstone surface is increased by deviating to the surface side. 4. The method according to claim 1, wherein the movement of the spectacle lens relative to the grinding wheel is performed by moving the spectacle lens. 5. The grindstone for bevel polishing according to claim 1, which is used for processing an end surface of a spectacle lens having one convex surface and a concave surface on the other surface. In the axial direction, a bevel groove configured to have an angle of inclination called a No. 1 angle with respect to a vertical line drawn on the axis of the whetstone, and a bevel groove for polishing the bevel on the inclined surface; A grindstone formed continuously with the inclined surface of the bevel groove and having a flank surface called a second angle with respect to a vertical line drawn on the axis of the grindstone and having an inclination angle larger than the first angle. 6. The width of the flank located on the concave side of the spectacle lens with respect to the bevel groove in the grindstone axis direction is larger than the width of the flank located on the convex side of the spectacle lens in the grindstone axis direction. The whetstone according to claim 5, which is also widened. 7. A co-grinding stone for rough-cutting the end surface of the spectacle lens, a bevel-finish whetstone for forming a bevel on the end surface of the spectacle lens, and a polish whetstone for mirror-finishing the end surface of the spectacle lens are integrally formed on the same axis. In preparation for, the bevel finishing whetstone and the polished whetstone have a bevel groove on a surface thereof corresponding to the bevel,
A whetstone comprising: a flank formed on both sides of the bevel groove; and a flat processing surface connected to the flank of the flank located on the back side of the spectacle lens. 8. A grinding wheel, a bevel finishing wheel, and a polishing wheel, which are integrally provided on the axis of the grinding wheel, have a substantially constant diameter, and vary the particle size of each grinding wheel in accordance with their function. The whetstone according to claim 7, which is provided. 9. An eyeglass lens end face processing apparatus provided with the grindstone according to claim 5.