JP2003231001A - Lens shape machining method and device thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens shape machining method and a device thereof capable of realizing excellent productivity and performing face shape generating machining of a glasses lens and lens shape machining by one device. <P>SOLUTION: While the glasses lens 12 is rotated around a rotary axis C of a workpiece in the direction of thickness of the glasses lens 12 by a workpiece rotation means 3, a tool 54 or the glasses lens 12 is reciprocated in the orthogonal direction to the rotary axis of the workpiece in synchronization with the rotation of the glasses lens 12 by a workpiece drive means 4 and a tool drive means 5. On the other hand, the tool 54 or the glasses lens 12 is reciprocated in the direction parallel with the rotary axis C of the workpiece in synchronization with the rotation of the glasses lens 12. Moreover, a lens shape machining mechanism is added to a face shape generating device. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a edging method and apparatus for cutting an spectacle lens so as to fit the spectacle frame.

[0002]

2. Description of the Related Art A spectacle lens which is optically compatible with a prescription of an orderer is subjected to a edging process so as to finally fit into a spectacle frame worn by the orderer, and is mounted on the spectacle frame for use.

As a conventional edging device for edging a spectacle lens, for example, one disclosed in Japanese Patent Laid-Open No. 9-174404 is known. This edging device can perform processing such that the side surface of the spectacle lens sandwiched by the workpiece rotation shaft is ground with a rotary grindstone and fitted into the spectacle frame.

[0004]

However, edging by grinding with a rotary grindstone has a problem that the processing time is long and the productivity is poor. In particular, if it is attempted to reduce the surface roughness by grinding, it is necessary to use a grindstone with a small grain size, which not only easily causes clogging, but also cannot increase the cut amount. Therefore, in order to obtain a surface roughness close to a mirror surface, it is necessary to carry out polishing in a separate step after grinding in consideration of productivity and quality, and there is a problem that productivity is poor.

Further, since the grinding resistance is large, chuck displacement may occur during processing, which causes a problem in processing accuracy.

In recent years, due to a shortage of edging engineers at eyeglass lens retailers, there is a demand for edging at a spectacle lens production factory. In this case, at present, edging is performed in a process different from the polishing process for creating the surface shape of the spectacle lens. For this reason, there is a problem that productivity is deteriorated due to an increase in the number of processes, and a manufacturing machine cost is increased due to the necessity of a dedicated machine tool for performing edging.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a edging method and apparatus with good productivity.

It is another object of the present invention to provide an edging method and apparatus which enable the spectacle lens surface shape forming processing and the edging processing to be performed by one apparatus.

[0009]

Means for Solving the Problems The present inventor has conducted extensive studies in order to achieve the above object, and as a result, has found a numerically controlled cutting apparatus using a cutting tool which has been conventionally used for creating a surface shape of an eyeglass lens. By applying it to edging, it was found that edging can be performed at higher speed than edging by grinding using a rotating grindstone.

Further, it has been found that it is possible to add a mechanism for performing edging to a numerically controlled cutting apparatus used for creating a surface shape of a conventional spectacle lens.
Thereby, after performing the surface shape creation, it is possible to perform the edging process without removing the spectacle lens from the chuck of the apparatus, or it is possible to perform the surface shape creation process and the edging process at the same time. It is possible to perform surface shape creation and edging with one device.

Therefore, according to the first aspect of the invention, while rotating the spectacle lens about the workpiece rotation axis in the thickness direction of the spectacle lens, a direction parallel to the work rotation axis and a direction orthogonal to the work rotation axis. By controlling the relative positions of the cutting tool and the spectacle lens in synchronization with the rotation of the work, the edging process is performed by the cutting tool so as to fit the spectacle lens to the spectacle frame. Provide a way.

According to a second aspect of the present invention, in the edging method according to the first aspect, a plurality of cutting tools including a rough cutting tool, a finishing tool and a beveling tool are exchanged for cutting. Provided is a edging method.

According to a third aspect of the present invention, while rotating the spectacle lens around the workpiece rotation axis in the thickness direction of the spectacle lens, the spectacle lens is rotated in a direction parallel to the work rotation axis and a direction orthogonal to the work rotation axis. By controlling the relative position between the surface shape creating tool and the spectacle lens in synchronization with the rotation of the work, a surface shape creating step of cutting the convex or concave surface of the spectacle lens with the tool, and the work rotating shaft. The spectacle lens is fitted to the spectacle frame by controlling the relative positions of the edging tool and the spectacle lens in a direction parallel to the work rotation axis and a direction orthogonal to the work rotation axis in synchronization with the work rotation. And a edging process step of cutting with the cutting tool as described above.

According to a fourth aspect of the present invention, there is provided a edging device for cutting a spectacle lens so as to fit it into a spectacle frame, wherein the spectacle lens is provided around a workpiece rotation axis in the thickness direction of the spectacle lens. Work rotating means for rotating, first driving means for reciprocating the bite holding means or the work rotating means in a direction orthogonal to the work rotation axis in synchronization with rotation of the spectacle lens, and synchronization with rotation of the spectacle lens Then, there is provided a edging device characterized by comprising: a cutting tool holding means or a second driving means for reciprocating the work rotating means in a direction parallel to the work rotation axis.

According to a fifth aspect of the present invention, in the edging machine according to the fourth aspect, the bite holding means includes a plurality of bits including a roughing bite, a finishing bite and a beveling bite. Provided is a edging device.

According to a sixth aspect of the present invention, the work rotating means for rotating the eyeglass lens around the work rotational axis in the thickness direction of the eyeglass lens and the work rotational axis parallel to the work rotational axis in synchronization with the rotation of the eyeglass lens. First driving means for controlling the relative position of the surface shape creating bite and the spectacle lens in a direction,
In synchronization with the rotation of the spectacle lens, second driving means for controlling the relative position of the surface shape creating tool and the spectacle lens in a direction orthogonal to the work rotation axis, and in synchronization with the rotation of the spectacle lens. Third driving means for controlling the relative positions of the edging tool and the spectacle lens in a direction parallel to the work rotation axis, and the third drive means in a direction orthogonal to the work rotation axis in synchronization with the rotation of the spectacle lens. Provided is a edging device which has a edging tool and a fourth drive means for controlling the relative position of the spectacle lens.

According to a seventh aspect of the present invention, in the edging machine according to the sixth aspect, the first driving means reciprocates the surface forming tool in a direction parallel to the workpiece rotation axis. The bite driving means for generating, the second
The drive means is a work drive means for reciprocating the work rotation means in a direction orthogonal to the work rotation axis,
The third driving means is an edge machining tool driving means for reciprocating the edge machining tool in a direction parallel to the workpiece rotation axis, and the fourth driving means is the workpiece driving means. Provided is a edging device.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the edging method and edging apparatus of the present invention will be described, but the present invention is not limited to the following embodiments.

FIG. 1 is a plan view showing a schematic configuration of a first embodiment of an edging machine capable of realizing the edging method of the present invention. This edging device 1 is a numerically controlled cutting device that performs cutting using a cutting tool, and includes a work rotating means 3, a work driving means 4, and a cutting tool driving means 5 on a bed 2.
Is provided.

The work driving means 4 comprises a Z-axis table 42 which is driven by a driving servomotor 41 so as to reciprocate in a substantially horizontal Z-axis direction. The position of the Z-axis table 42 is determined by an encoder or a linear scale. Be indexed. The work rotating means 3 is fixed on the Z-axis table 42. In the work rotating means 3, a work chuck 31 is attached to the tip of a work rotating shaft C that is parallel to the Z axis, and the work rotating shaft C is rotationally driven by a rotating shaft driving servomotor 32. Rotation angle of the work rotation axis C,
That is, the rotation angle of the work chuck is determined by the encoder. The finish lens (workpiece) 10 to be edging is attached to the work chuck 31 via a block jig (not shown). The thickness direction of the lens 10 mounted on the work chuck 31 is parallel to the work rotation axis C, and the lens 10 mounted on the work chuck 31 rotates around the work rotation axis C. The Z-axis table 42
Is movably driven in the horizontal X-axis direction orthogonal to the Z-axis, and its position is determined by an encoder or a linear scale.

The cutting tool driving means 5 is arranged at a position facing the side surface of the work 10 and is driven by a driving servomotor 51 so as to reciprocate in the substantially horizontal X-axis direction orthogonal to the Z-axis. A table 52 is provided. The position of the X-axis table 52 is indexed by an encoder or a linear scale. A tool rest 53 serving as a tool holding means is fixed on the X-axis table 52, and a edging tool 54 is attached to the tool rest 53.

Lens 1 fixed to work chuck 31
0 is rotated at a high speed around the work rotation axis C by the work rotation means 3, and the position in the Z-axis direction is set by the work drive means 4 corresponding to the rotation angle of the work rotation axis C based on predetermined numerical data. Controlled. Also, byte 54
The position of the tip of the tool in the X-axis direction corresponds to the rotation angle of the work rotation axis C on the basis of predetermined numerical data, and is set to the bite driving means 5.
Controlled by.

A control method of this edging device will be described. First, it is necessary that the eyeglass frame information necessary for edging is acquired in advance. The spectacle frame information includes a product name of the spectacle frame, three-dimensional shape data of the spectacle frame, layout information which is a pupil position on the spectacle frame, bevel information such as a bevel shape, right or left.
The shape of the bevel includes flat processing, standard bevel, and groove digging. The three-dimensional shape data of the eyeglass frame and the bevel information are acquired from a database or measured using a commercially available eyeglass frame shape measuring apparatus. These pieces of spectacle frame information are directly transmitted online from the terminal provided in the spectacle retail store to the computer of the manufacturing department of the lens manufacturer. Alternatively, a relay point receives prescription data from a retail store by a transmission means such as a telephone or a facsimile, and online transmission is performed from this relay point.

Based on the spectacle frame information input to the computer and the numerical values of the diameter and thickness of the lens to be used, the target lens shape including the bevel is calculated, and the numerical data for processing is calculated for each spectacle lens. The numerical data are the rotation angle θ of the work rotation axis C, the radius from the center point of the work rotation axis C, and the position in the lens thickness direction (Z-axis direction). This numerical data is transmitted from the computer to the edging machine 1.

In the cutting process, as shown in FIG.
Based on the numerical data, the work rotating means 3 (C axis), the work driving means 4 (Z axis) and the bite driving means 5 (X axis).
The center coordinates of the tip of the cutting tool 54 are positioned in the normal direction set up on the processing point on the side surface of the spectacle lens 10 using the three axes. That is, the relative position between the lens 10 and the tip of the cutting tool 54 in the direction of the work rotation axis (Z axis) (the direction perpendicular to the paper surface), the rotation center of the lens in the X-axis direction perpendicular to the work rotation axis, and the cutting tool 54. The side surface of the lens is cut by synchronizing the relative position with the tip of the lens to the rotation angle θ of the lens. Since the position of the cutting tool 54 is controlled by the cutting tool driving unit 5, the X-axis table 52 is lightweight, so that the inertial force is small and the tool can reciprocate at high speed. Therefore, even when the lens 10 is rotated at a high speed, the cutting tool 54 can follow the positioning accurately, and high-speed cutting can be performed.

The number of revolutions of the workpiece is controlled by numerical data, and the lens 1 is moved at a predetermined feed pitch and cutting amount.
The side surface of 0 is cut with a cutting tool 54, and the lens 10 is shown in FIG.
It is processed into a lens shape 11 as shown in (b).

Edge processing apparatus 1 by such cutting processing
By using, it is possible to rapidly perform cutting processing with a cutting tool while rotating the spectacle lens at high speed, and thus it is possible to perform edging processing with high productivity.

In the above description, the work rotating means 3 was driven so as to reciprocate in the Z-axis direction, and the bite driving means 5 was driven so as to reciprocate in the X-axis direction. However, these directions may be reversed, and the work rotating means 3 is also possible. In the X-axis direction, the bite driving means 5
May be driven so as to reciprocate in the Z-axis direction. Further, either one of the work rotating means 3 and the bite driving means 5 may be fixed, and the other may be driven in both the Z-axis direction and the X-axis direction.

Next, a second embodiment of the edging device of the present invention will be described. FIG. 3 is a plan view showing a schematic configuration of the edging device of the second embodiment.

This edging machine 1b has the same basic configuration as the edging machine 1 of the first embodiment, but a tool rest 53 which is a tool holding means fixed on the tool driving means 5. Includes a cutting tool 541 for roughing and a cutting tool 5
42, bevel processing bite 543, groove cutting bite 54
Four types of cutting tools No. 4 are attached, and the cutting tools are configured to be changed according to the type of edging, and the cutting can be performed using an optimum cutting tool. Since other configurations are the same, the same members are designated by the same reference numerals and the description thereof is omitted. The types of bytes are not limited to these four types, and other types of bytes may be added or replaced.

The edging method by the edging machine 1b of the second embodiment will be described with reference to FIG. In FIG. 4, only the upper half of the rotation center of the lens is shown. FIG. 4A shows an example of flat processing. As shown in FIG. 4A, the side surface of the spectacle lens 10 to be edge-shaped is first subjected to cutting using a rough cutting tool 541 to a shape very close to a predetermined edge shape. Next, the rough-cut lens 10a is finished with a finishing bite 542 to finish the end face to have a surface roughness that gives a good appearance, and a flat-shaped target lens 11a is obtained. The flat processing is used, for example, when holes or holes are formed in the lens to directly fix the temples or bridges of the spectacle frame. Since the edging surface is exposed, good surface roughness is required.

FIG. 4B shows an example in which a standard bevel is provided. As shown in FIG. 4B, the side surface of the lens 10 to be edging is rapidly cut by a rough cutting tool 541 to a shape close to a predetermined edging shape. Next, the side surface of the rough-cut lens 10b is processed by using the beveling cutting tool 543 to form a bevel on the side surface of the lens, and the target lens 11b provided with the bevel is obtained. The bevel is a projection that is fitted and fixed in a bevel groove provided on the inner surface of the spectacle frame. It is difficult to form a bevel with an ordinary bite, and it is desirable to form it with a dedicated beveling bite 543.

FIG. 4C shows an example of forming a trench. As shown in FIG. 4C, the side surface of the spectacle lens 10 to be edge-shaped is first subjected to cutting using a roughing cutting tool 541 so as to be swiftly close to a predetermined edge shape. Next, the rough-cut lens 10a is finished with a finishing bite 542 to finish the end face to have a surface roughness that looks good, and the flat-shaped lens lens 11a is obtained. Next, grooving is performed using the grooving tool 544 to obtain the target lens 11c in which grooves are formed. Grooving is used when fitting a synthetic resin thread into the groove to fix the lens 11c to the spectacle frame. Since it is a fine groove, it is difficult to form it with an ordinary cutting tool, and it is desirable to form it with a dedicated cutting tool 544.

As the processing conditions, the number of rotations of the work is 100 to 10,000 rpm in the rough cutting, 100 to 3000 rpm in the finishing and the beveling, and the feed pitch, which is the moving amount of the cutting tool per revolution of the work, is 0 in the rough cutting. 0.005 to 1.0 mm / rev, 0.005 to 0.2 mm / rev for finishing and beveling, and the depth of cut that makes it difficult for the workpiece to cut is 0.1 for roughing.
˜10.00 mm / pass, and the range of 0.05 to 3.0 mm / pass for finishing and beveling.

As described above, the edging device 1b, which is provided with a plurality of cutting tools and is capable of cutting by switching the cutting tools, efficiently performs rapid rough cutting, end surface finishing with good surface roughness, beveling, and grooving. Since it can be performed at any time, it has excellent productivity for edging.

Next, the edging device of the third embodiment will be described with reference to FIG. FIG. 5: is a top view which shows the schematic structure of the edging apparatus 1c of 3rd Embodiment. The edging device 1c has a configuration in which edging tool driving means for edging is added to a numerically controlled cutting device for cutting the surface shape of a spectacle lens.

The edging device 1c shown in FIG.
Workpiece rotating means 3, work driving means 4c, surface shape creating bite driving means 6, and edging tool bite driving means 5 on top.
with c.

The work driving means 4c is provided with an X-axis table 42c which is driven by a driving servomotor 41c so as to reciprocate in the substantially horizontal X-axis direction, and the position of the X-axis table 42c is determined by an encoder or a linear scale. Be indexed. The work rotating means 3 is fixed on the X-axis table 42c. The work rotating means 3 is
A work chuck 31 is attached to the tip of a work rotating shaft C which is orthogonal to the X axis and which is parallel to the substantially horizontal Z axis, and the work rotating shaft C is rotationally driven by a rotary shaft driving servomotor 32. The rotation angle of the work rotation axis C, that is, the rotation angle of the work chuck 31 is determined by the rotary encoder. A semi-finished lens (workpiece) to be machined and shaped into a surface shape on the work chuck 31
12 is mounted via a block jig (not shown). The thickness direction of the lens 12 mounted on the work chuck 31 is parallel to the work rotation axis C, and the lens 12 mounted on the work chuck 31 rotates around the work rotation axis C.

The surface shape generating tool driving means 6 is arranged at a position facing the concave surface or the convex surface of the lens 12, and is driven by the driving servomotor 61 so as to reciprocate in the Z1 axis direction. And the position of the first Z-axis table 62 is indexed by an encoder or a linear scale. On the first Z-axis table 62, two first tool rests 63 and second tool rests 64 as tool holding means are fixed, a rough cutting tool 65 is fixed to the first tool rest 63, and a second tool A finishing bite 66 is fixed to the table. The rough cutting tool 65 is made of, for example, cemented carbide, and the finishing tool 66 is made of, for example, single crystal diamond.

Also, the edging processing tool driving means 5c is
The work chucks 31 are arranged at positions facing each other with a slight distance in the X-axis direction. Tool for cutting edge 5c
Includes a second Z-axis table 55, and the second Z-axis table 5
5 is driven by a driving servomotor 56 so as to reciprocate in the Z2 axis direction. The position of the second Z-axis table 55 is indexed by an encoder or a linear scale. On the second Z-axis table 55, a tool rest 53 as a tool holding means is fixed, and a tool 54 for edging is attached to the tool rest 53.

The lens 12 is driven to rotate about the work rotation axis C by the work rotating means 3 and the lens 1
Positioning in the X-axis direction is performed by the work driving means 4c according to the rotation angle of 2. Surface Shape Creating Bit 65,66
The tip of the is positioned by the surface shape creating tool driving means 6 in the Z1 axis direction according to the rotation angle of the lens 12. The tip of the edging tool 54 is Z-shaped by the edging tool driving means 5c according to the rotation angle of the lens 12.
Positioning is performed in two axial directions.

At the time of cutting for creating the surface shape of the lens 12, the driving of the edging tool bit driving means 5c is stopped,
Work rotating means 3 (C axis), work driving means 4c (X
Axis) and the surface shape creating bite driving means 6 (Z1 axis) are used to position the center coordinates of the tip of the bite 65 or the bite 66 in the direction normal to the machining point of the lens 12.
That is, while rotating the work 12, the surface shape creating bits 65, 6 in the Z-axis direction, which is the work rotation axis of the work 12,
Cutting is performed by synchronizing the relative positions of the tip of 6 and the work 12 and the relative positions of the tips of the surface shape creating bites 65 and 66 in the X-axis direction and the rotation center of the work 12 with the rotation of the work 12. .

In the cutting step, first, the outer diameter of the semi-finished lens 12 is cut by the rough cutting tool 65 to a predetermined diameter on the basis of the numerical data for generating a predetermined surface shape given to the lens. Subsequently, the rough cutting tool 65 is used to cut a rough surface having a surface roughness Rmax of 100 μm or less with a surface shape approximate to a desired lens surface shape based on numerical data. Subsequently, the finishing bit 66 is used to cut the remaining approximately 0.1 to 5.0 mm based on the numerical data, and the lens surface based on the prescription data of the spectacle lens having the surface roughness Rmax of approximately 0.1 to 10 μm. The shape is processed.
Then, chamfering is performed using the finishing tool 66.

As the cutting conditions, the number of rotations of the work is 100 to 3000 rpm in the rough cutting and 1 in the finishing.
0 to 3000 rpm, the feed pitch is 0.005 to 1.0 mm / rev in the roughing process, and is 0.
The cutting depth is 005 to 0.2 mm / rev and the cutting depth is 0.1 to 10.00 mm / pass in the rough cutting process and 0.05 to 3.0 mm / pass in the finishing process.

In the machining of surface shape generation by such numerical control, any surface shape such as a spherical surface, a toric surface, an axisymmetric aspherical surface, a progressive surface, a progressive surface and a toric surface are formed on the convex surface or the concave surface of the lens. It is possible to create a non-axisymmetric aspherical surface such as a combined curved surface.

When the edging of the lens 12 is performed, the driving of the surface shape creating tool driving means 6 is stopped. Work rotating means 3 (C axis), work driving means 4c (X axis),
The center coordinates of the tip of the cutting tool 54 are positioned in the normal direction set up at the processing point of the lens 12 by using the three axes of the edging processing tool driving means 5c (Z2 axis). That is, while rotating the work 12, the relative position between the tip of the edging tool 54 in the Z axis direction, which is the work rotation axis of the work 12, and the relative position of the work 12, and the tip of the edging tool 54 in the X axis direction. And the relative position between the rotation center of the work 12 and the rotation of the work 12 are synchronized with each other to perform a cutting process to obtain a edging lens.

The edging device 1c as described above can continuously perform the surface shape creating process and the edging process without removing the lens 12 from the work chuck 31 with one device 1c. Therefore, it is possible to eliminate the need for a device that only performs edging or reduce the number of devices. In addition, conventionally,
A block process for adhering the lens to the holding jig with a predetermined alignment was required in the two processes of the surface shape creation process and the edging process, but now it can be done only once, which simplifies the production process. It has become possible.

Next, the edging device of the fourth embodiment will be described with reference to FIG. FIG. 6 is a plan view showing a schematic configuration of an edge processing apparatus 1d of the fourth embodiment. The edging device 1d is configured to be capable of independently performing the cutting process for creating the surface shape of the spectacle lens and the edging process.

The edging device 1d shown in FIG.
Workpiece rotating means 3 and tool for generating surface shape 6
d and a cutting tool driving means 5d for edging.

The work rotating means 3 is fixed on the bed 2, a work chuck 31 is attached to the tip of a work rotating shaft C which is substantially parallel to the Z axis, and the work rotating shaft is driven by a rotary shaft driving servomotor 32. C is rotationally driven. Rotation angle of the work rotation axis C, that is, the work chuck 31
The rotation angle of is determined by the rotary encoder. A semi-finished lens (workpiece) 12 to be subjected to surface shape generation cutting and edging is attached to the work chuck 31 via a block jig (not shown). The thickness direction of the lens 12 mounted on the work chuck 31 is parallel to the work rotation axis C, and the lens 12 mounted on the work chuck 31 rotates around the work rotation axis C.

The surface shape creating tool driving means 6d is arranged at a position facing the concave surface or the convex surface of the lens 12, and
An X-axis table 67 and a first Z-axis table 62 are provided.
The first X-axis table 67 is driven by a drive servomotor 68 so as to reciprocate in the X1 axis direction orthogonal to the Z axis direction, and the position of the first X axis table 67 is determined by an encoder or a linear scale. The first Z-axis table 62 is installed on the first X-axis table 67, and is driven by the driving servomotor 61 so as to reciprocate in the Z1 axis direction. The position of the first Z-axis table 62 is determined by an encoder or a linear scale. On the first Z-axis table 62, two first tool rests 63 and second tool rests 64 as tool holding means are fixed, a rough cutting tool 65 is fixed to the first tool rest 63, and a second tool A finishing bite 66 is fixed to the table.

Further, the edging processing tool driving means 5d is
The work chucks 31 are arranged at positions facing each other with a slight distance in the X-axis direction. Tool for cutting tool 5d
Includes a second X-axis table 57 and a second Z-axis table 55. The second X-axis table 57 is driven by a driving servomotor 58 so as to reciprocate in the X2-axis direction orthogonal to the Z-axis direction, and the position of the second X-axis table 57 is determined by an encoder or a linear scale. The second Z-axis table 55 is installed on the second X-axis table 57, and is driven by the driving servomotor 56 so as to reciprocate in the Z2 axis direction. The position of the second Z-axis table 55 is indexed by an encoder or a linear scale. On the second Z-axis table 55, a tool rest 53 as a tool holding means is fixed, and a tool 54 for edging is attached to the tool rest 53.

The lens 12 is driven to rotate about the work rotation axis C by the work rotating means 3. The tips of the surface shape creating bites 65 and 66 are positioned in the X1 axis direction and the Z1 axis direction by the surface shape creating bite driving means 6d according to the rotation angle of the lens 12. That is, the work 12
While rotating the Z, which is the work rotation axis of the work 12.
The relative position of the tip of the axial shape generating tools 65, 66 and the work 12 and the relative position of the tip of the X-axis surface generating tools 65, 66 and the rotation center of the work 12 are set. Cutting is performed in synchronization with the rotation of. Further, the tip of the edging tool 54 is moved by the edging tool driving means 5d according to the rotation angle of the lens 12 to move the X-axis.
Positioning is performed in the biaxial direction and the Z2 axis direction. That is,
While rotating the work 12, the relative position between the tip of the edging tool 54 in the Z-axis direction, which is the work rotation axis of the work 12, and the work 12, and the tip of the edging tool 54 in the X-axis direction and the work. The relative position with respect to the rotation center of 12 is synchronized with the rotation of the work 12 to perform the cutting process to obtain the edging lens.

This edging device 1d is similar to the edging device 1c of the third embodiment, in that the workpiece rotating means 3 (C
Axis), surface shape creating tool driving means 6d (X1 axis and Z
After cutting the surface shape using 3 axes (1 axis), the workpiece rotating means 3 (C axis), the edging tool driving means 5d
It is possible to perform edging using three axes (X2 axis and Z2 axis). Further, the lens 12 does not move, and the surface shape creating tool driving means 6d and the edging processing tool driving means 5d.
Since and are controlled independently of each other, it is possible to simultaneously perform the surface shape generating cutting processing and the edging processing cutting processing.

In addition to the effect of the edging device 1c of the third embodiment, such an edging device 1d can simultaneously perform the surface shape generating cutting process and the edging cutting process. The processing time can be shortened.

In the description of the edging device 1c of the third embodiment and the edging device 1d of the fourth embodiment, an example in which the edging tool is one is shown, but as in the second embodiment. A plurality of cutting tools may be attached to the cutting tool holding means, and the cutting tools may be exchanged for cutting.

In addition, the directions in which the respective tables of the workpiece driving means 4c, the surface shape creating tool driving means 6 and the edging processing tool driving means 5c in the edging device 1c of the third embodiment move are the work rotation axis C. The relative positions of the lens and the bite with respect to the two directions, that is, the direction parallel to and the direction orthogonal to, are not limited to the above description.

For example, the edging device 1c shown in FIG.
In the above, the work driving means 4c was used for both the shape creating processing and the edging processing. However, the second work driving means for driving and controlling the work rotating means 3 in the Z-axis direction is the X-axis table 42c.
It is installed on top of the machine and the tool driving tool 5c for edging
Can be configured to be driven and controlled in the X-axis direction. The edging machine having such a structure uses the second workpiece driving means for controlling the reciprocating movement in the Z-axis direction and the edging tool driving means for controlling the reciprocating movement in the X-axis direction during the edging. Since it is not necessary to use the X-axis table 42c which is relatively heavy and is subjected to the edging process, it is possible to further speed up the edging process.

[0059]

According to the edging method of the present invention, the edging is performed by cutting, so that the edging can be performed at high speed and the productivity is improved.

Further, according to the edging method of the present invention, the surface shape generating process and the edging process can be continuously performed by one apparatus, so that the productivity is improved.

Since the edging apparatus of the present invention performs edging by cutting, it can be processed at high speed and has good productivity.

Further, since the edging apparatus of the present invention has a structure in which the edging mechanism is added to the surface forming apparatus, the surface forming and edging can be continuously performed by one device. It is possible and the productivity is good.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a first embodiment of an edge processing apparatus of the present invention.

2 (a) and 2 (b) are views for explaining the edging method by the edging apparatus of the present invention, and are front views seen from the workpiece rotation axis direction.

FIG. 3 is a plan view showing a schematic configuration of a second embodiment of an edge processing apparatus of the present invention.

FIGS. 4A to 4C are flowcharts showing edging processing steps by the edging processing apparatus according to the second embodiment.

FIG. 5 is a plan view showing a schematic configuration of a third embodiment of an edge processing device of the present invention.

FIG. 6 is a plan view showing a schematic configuration of a edging device according to a fourth embodiment of the present invention.

[Explanation of symbols]

1, 1b, 1c, 1d edging device 2 bed 3 work rotating means 31 work chucks 4, 4c work driving means 5, 5c, 5d edging tool driving means 53 turret (bite holding means) 54 edging processing Tool 6, 6d Tool for generating surface shape Tool 65 Tool for rough cutting 66 Tool for finishing 10, 12 Lens (workpiece)

Claims (7)

[Claims] 1. A bite and a spectacle lens in a direction parallel to the work rotation axis and a direction orthogonal to the work rotation axis while rotating the spectacle lens about a work rotation axis in a thickness direction of the spectacle lens. The edging method is characterized in that the eyeglass lens is cut by the cutting tool so as to be fitted in the eyeglass frame by controlling the relative position of the eyeglass lens in synchronization with the rotation of the work. 2. The edging method according to claim 1, wherein a plurality of cutting tools including a rough cutting tool, a finishing tool and a beveling tool are exchanged for cutting. . 3. A surface shape creating bit in a direction parallel to the work rotation axis and a direction orthogonal to the work rotation axis while rotating the spectacle lens about the work rotation axis in the thickness direction of the spectacle lens. By controlling the relative position with the spectacle lens in synchronization with the work rotation, a surface shape creating step of cutting the convex or concave surface of the spectacle lens with the cutting tool, a direction parallel to the work rotation axis, and the By controlling the relative position of the edging tool and the spectacle lens in the direction orthogonal to the work rotation axis in synchronization with the work rotation, the spectacle lens is fitted to the spectacle frame with the bit. A edging process method, which comprises performing a edging process of cutting. 4. A edging device for cutting a spectacle lens so as to be fitted into a spectacle frame, the work rotating means rotating the spectacle lens around a work rotation axis in a thickness direction of the spectacle lens. A first drive means for reciprocating the bite holding means or the work rotating means in a direction orthogonal to the work rotation axis in synchronization with the rotation of the eyeglass lens; and the work rotation axis in synchronization with the rotation of the eyeglass lens. And a second driving unit that reciprocates the cutting tool holding unit or the work rotating unit in a direction parallel to the edge processing apparatus. 5. The edging machine according to claim 4, wherein the cutting tool holding means includes a plurality of cutting tools including a roughing cutting tool, a finishing cutting tool and a beveling cutting tool. . 6. A work rotation means for rotating the spectacle lens around a work rotation axis in a thickness direction of the spectacle lens, and for generating a surface shape in a direction parallel to the work rotation axis in synchronization with the rotation of the spectacle lens. First driving means for controlling a relative position between the bite and the spectacle lens; a relative position between the surface shape creating bite and the spectacle lens in a direction orthogonal to the workpiece rotation axis in synchronization with rotation of the spectacle lens. A second drive unit for controlling the relative position of the edging tool and the spectacle lens in a direction parallel to the workpiece rotation axis in synchronization with the rotation of the spectacle lens; A edging process characterized by comprising a edging tool and fourth driving means for controlling the relative position of the edging lens in a direction orthogonal to the workpiece rotation axis in synchronization with the rotation of the spectacle lens. Location. 7. The edge-forming machine according to claim 6, wherein the first driving means is a surface-shape creating tool driving means for reciprocating the surface-shape creating tool in a direction parallel to the workpiece rotation axis. Yes, the second drive means is a work drive means for reciprocating the work rotation means in a direction orthogonal to the work rotation axis, and the third drive means is the ball in a direction parallel to the work rotation axis. An edging device, which is a edging tool driving means for reciprocating a dies for machining, wherein the fourth driving means is the work driving means.