JP7035433B2 - Eyeglass lens processing equipment and eyeglass lens processing program - Google Patents

Description

The present disclosure relates to a spectacle lens processing device and a spectacle lens processing program for processing the peripheral edge of a spectacle lens.

The spectacle lens processing device is equipped with a grinding tool and a cutting tool, and processes the spectacle lens by adjusting the positional relationship between the spectacle lens sandwiched between the rotating shafts and the rotation axis of each processing tool. Is known (see Patent Documents 1 and 2). For example, as the processing of the spectacle lens, there is a step drop processing in which the front surface of the spectacle lens is projected by forming a stepped portion on the rear surface of the spectacle lens.

Japanese Unexamined Patent Publication No. 2006-095684 Japanese Unexamined Patent Publication No. 2015-066650

The spectacle lens that has been chamfered has edges on the edge side and the back refraction surface side of the stepped portion, but since it was found that the edge on the back refraction surface side is sharp, the edge on the back refraction surface side On the other hand, we considered chamfering. However, it has been found that during such chamfering, the processing tool comes into contact with the protruding portion together with the edge on the rear refracting surface side, causing a problem that the protruding portion is scraped.

In view of the above-mentioned prior art, the present disclosure has a technical problem of providing a spectacle lens processing apparatus capable of suppressing scraping of a protruding portion on the front surface of a spectacle lens and appropriately performing chamfering, and a spectacle lens processing program. do.

In order to solve the above problems, the present disclosure is characterized by having the following configurations.

(1) The spectacle lens processing apparatus according to the first aspect of the present disclosure includes a first rotating shaft for sandwiching and rotating the spectacle lens, and a chamfering tool for chamfering the peripheral edge of the spectacle lens. An angle formed by a spectacle lens processing apparatus having a second rotating shaft to which the chamfering tool is attached, the rotation center axis of the first rotating shaft, and the processing tool surface of the chamfering tool. A chamfering angle setting means for setting the chamfering angle, an adjusting means for adjusting the relative positional relationship between the first rotating shaft and the second rotating shaft based on the chamfering angle, and a step on the rear surface of the spectacle lens. It is a control means for chamfering the edge on the rear bending surface side of the stepped portion formed by the drop processing by the chamfering tool adjusted by the adjusting means, and is the chamfering tool and the stepped portion. The control means is provided with a control means for adjusting the relative positional relationship between the first rotary shaft and the second rotary shaft so as not to come into contact with the edge on the edge surface side of the lens. The end portion of the chamfering tool is on the edge surface side of the first surface formed on the stepped portion, and is within the range on the rear bending surface side of the second surface formed on the stepped portion. It is characterized in that it is controlled so as to be in an arranged state .
(2) The spectacle lens processing program according to the second aspect of the present disclosure includes a first rotating shaft for sandwiching and rotating the spectacle lens, a chamfering tool for chamfering the peripheral edge of the spectacle lens. It is a spectacle lens processing program executed in a spectacle lens processing apparatus having a second rotary shaft to which the chamfering tool is attached, and is executed by a processor of the spectacle lens processing apparatus to perform the first rotation. The first rotation shaft and the second rotation based on the chamfering angle setting step for setting the chamfering angle formed by the rotation center axis of the shaft and the machining tool surface of the chamfering tool, and the chamfering angle. The adjustment step for adjusting the relative positional relationship with the shaft and the edge on the rear refraction surface side in the stepped portion formed by subjecting the rear surface of the spectacle lens to a step drop process are adjusted by the adjusting means. This is a control step for chamfering with a chamfering tool, and is a relative relationship between the first rotating shaft and the second rotating shaft so that the chamfering tool and the edge on the edge surface side of the step portion do not come into contact with each other. A control step for adjusting a specific positional relationship is executed by the spectacle lens processing apparatus, and the control step is a first surface in which an end portion of the chamfering tool is formed on the step portion during chamfering. It is characterized in that the lens is controlled so as to be arranged on the edge surface side and within the range on the posterior refracting surface side of the second surface formed in the stepped portion .

It is a schematic block diagram of the spectacle lens processing apparatus. It is a schematic block diagram of a lens processing part. It is a schematic block diagram of a lens chuck unit. It is a figure explaining the drive mechanism in the X-axis direction and the Z-axis direction of a lens chuck unit. It is a figure explaining the drive mechanism in the Y-axis direction of a spindle holding unit. It is a control block diagram of the spectacle lens processing apparatus. It is a flowchart explaining the control operation. It is a side view of the lens in the case of performing a step drop process. It is a figure which shows the positional relationship of a processing tool and a lens at the time of chamfering. It is a figure which shows the lens after chamfering. It is a figure explaining the positional relationship between the 1st rotary shaft which holds a lens having a small lens shape, and a processing tool. It is a figure which shows the transformation example of a chamfer angle.

<Overview>
Hereinafter, an example of the embodiment in the present disclosure will be described with reference to the drawings. 1 to 12 are views for explaining the spectacle lens processing apparatus according to the present embodiment. In the present embodiment, the front-rear direction when the spectacle lens processing apparatus is viewed from the front will be described as the X-axis direction, the vertical direction will be described as the Y-axis direction, and the left-right direction will be described as the Z-axis direction. The items classified by <> below can be used independently or in relation to each other.

The present disclosure is not limited to the apparatus described in the present embodiment. For example, terminal control software (program) that performs the functions of the following embodiments is supplied to the system or device via a network or various storage media, and the control device (for example, CPU or the like) of the system or device reads the program. It is also possible to do it.

For example, the spectacle lens processing apparatus (for example, the spectacle lens processing apparatus 1) in the present embodiment has a first rotating shaft (for example, the first rotating shaft 22), a second rotating shaft (for example, the rotating shaft 45c1), and chamfering. A processing tool (for example, a processing tool 65c) is provided. For example, the first rotating shaft is used to hold (hold) and rotate the spectacle lens. For example, a chamfering tool is attached to the second rotating shaft. For example, a chamfering tool is used to chamfer the peripheral edge of a spectacle lens.

For example, the chamfering tool in this embodiment may be a step-down processing tool (for example, a processing tool 65c) for performing a step-down process on the spectacle lens. For example, the step-down processing tool performs a step-down process on the spectacle lens and chamfers the edge on the rear refraction surface side of the spectacle lens. As a result, it is not necessary to separately provide a processing tool for chamfering, and the processing of the spectacle lens can be efficiently advanced. Of course, the chamfering tool in this embodiment may be a tool different from the step-down tool. For example, in this case, chamfering can be performed using a finishing tool (for example, a tool 65b).

Further, for example, the spectacle lens processing apparatus in this embodiment may include a chamfer angle setting means (for example, a control unit 70). Further, for example, the spectacle lens processing apparatus in the present embodiment may include adjusting means (for example, an axis angle changing mechanism 25, an X-axis drive mechanism 80, a Y-axis drive mechanism 90, and a Z-axis drive mechanism 85). Further, for example, the spectacle lens processing apparatus in this embodiment may include a control means (for example, a control unit 70).

For example, the chamfer angle setting means sets the chamfer angle (for example, the chamfer angle β). For example, in the chamfering angle setting means in this embodiment, the angle formed by the rotation center axis of the first rotating shaft (for example, the rotation center axis L2) and the processing tool surface of the chamfering tool is set as the chamfering angle. The chamfering angle may be such that the relative inclination relationship between the spectacle lens and the chamfering tool can be obtained. That is, the chamfering angle may be set as an angle formed by the rotation center axis of the first rotating shaft and the rotation center axis of the chamfering tool (for example, the rotation center axis L2).

For example, the adjusting means adjusts the relative positional relationship between the first rotating shaft and the second rotating shaft based on the chamfering angle. The relative positional relationship between the first rotary shaft and the second rotary shaft may be adjusted by moving at least one of the positions of the first rotary shaft and the second rotary shaft. For example, in this embodiment, the first rotary shaft is moved with respect to the second rotary shaft. Further, for example, in this embodiment, the first rotary shaft is rotated with respect to the second rotary shaft. As a result, the three-dimensional positions of the spectacle lens and the chamfering tool are relatively adjusted.

For example, the control means chamfers the edge on the rear refraction surface side (for example, the edge Eb on the rear refraction surface side) in the stepped portion formed by subjecting the rear surface of the spectacle lens to a step drop process. Chamfering is performed with a processing tool. Of course, for example, the control means may chamfer the corners of the protruding portion formed by performing the step-down processing on the rear surface of the spectacle lens with the chamfering tool adjusted by the adjusting means.

For example, the control means is a portion of the step portion of the chamfering tool other than the edge on the posterior refracting surface side (for example, at least one of a protruding portion formed on the spectacle lens, a posterior refracting surface, and a front refracting surface). The relative positional relationship between the first rotating shaft and the second rotating shaft is adjusted so as not to come into contact with. For example, in this embodiment, the first rotary shaft and the second rotation shaft and the second rotation shaft are prevented from coming into contact with the chamfering tool and the edge on the edge surface side (for example, the edge Ec on the edge surface side) in the stepped portion during chamfering. The relative positional relationship with the rotating shaft is adjusted. As a result, the edge of the stepped portion on the rear refracting surface side can be chamfered without deforming the protruding portion formed by the step-down process.

For example, as a method of adjusting the positional relationship so that the chamfering tool and the edge on the edge surface side do not come into contact with each other, the adjusting means is a first surface (for example, first) in which the end portion of the chamfering tool is formed in a stepped portion. A state in which the surface is on the edge surface side of the surface P1) and is arranged within a range (for example, range R) on the rear refraction surface side of the second surface (for example, the second surface P2) formed in the stepped portion. It may be controlled so as to be. For example, such a range may be within the range of the angle formed by the first surface and the second surface formed by the step-down process.
For example, by performing such control, when chamfering the edge on the back refraction surface side, it is possible to prevent the chamfering tool from coming into contact with the edge on the edge surface side and scraping the edge on the edge surface side. can do. The end of the processing tool may be the end of the processing surface. Further, the end portion of the processing tool may be a corner portion of the processing tool. The corner portion of the processing tool may include a predetermined range.

For example, when the end of the chamfering tool is the end on the root side (for example, the end t1), the adjusting means is such that the rotating shaft of the chamfering tool (for example, the second rotating shaft 45c1) is the first. It may be controlled so as to extend in a direction away from the rotating shaft. For example, when the rotary shaft of the machining tool extends away from the first rotary shaft, the machining tool surface of the chamfering tool is close to the first rotary shaft 22, and the rotary shaft of the chamfering tool is the first rotary shaft. It is in a state of extending in a direction far from 22. As a result, it is possible to prevent the edge on the edge surface side from being scraped when chamfering the edge on the rear refraction surface side, and it is possible to further suppress the interference between the first rotating shaft and the second rotating shaft. can.

For example, the control means determines the relative positional relationship between the first rotating shaft and the second rotating shaft in the direction in which the intersection formed by the first surface and the second surface and the end portion of the chamfering tool coincide with each other. Chamfering is performed by adjusting. In order to further suppress the interference between the first rotary shaft and the second rotary shaft, the second rotary shaft of the chamfering tool may have a shape different from the linear shape. For example, in this case, the second rotating shaft of the chamfering tool may be L-shaped. Further, for example, the second rotating shaft of the chamfering tool may be curved.

The spectacle lens processing apparatus in this embodiment may include an edge information acquisition means (for example, a control unit 70) for acquiring information regarding the shape of the edge surface of the spectacle lens. For example, the information regarding the shape of the edge surface of the spectacle lens may be the tilt angle of the edge surface of the spectacle lens. Further, for example, the information regarding the shape of the edge surface of the spectacle lens may be the thickness of the edge surface of the spectacle lens. The tilt angle of the edge surface and the thickness of the edge surface of the spectacle lens are different for each radius angle and are not constant. Therefore, for example, the chamfer angle setting means may set the chamfer angle based on the information regarding the shape of the edge surface acquired by the edge information acquisition means. As a result, an appropriate chamfering angle can be set for each radial angle of the ball shape, and the edge on the rear refracting surface side can be chamfered.

Further, the spectacle lens processing apparatus in the present embodiment may include a determination means (for example, a control unit 70) for determining whether or not the chamfering tool comes into contact with the first rotating shaft. For example, the chamfer angle setting means may correct at least one of the chamfer angle and the chamfer amount based on the determination result by the determination means. For example, in this case, the chamfering angle setting means may calculate the chamfering angle at which the chamfering tool does not contact the first rotating shaft, and correct the chamfering angle based on the calculation. Further, for example, in this case, the chamfering angle setting means may calculate the chamfering amount at which the chamfering tool does not contact the first rotating shaft, and correct the chamfering amount based on the calculation. Of course, both the chamfering angle and the chamfering amount at which the chamfering tool does not come into contact with the first rotating shaft may be obtained by calculation, and the chamfering angle and the chamfering amount may be corrected based on this. As a result, the contact between the first rotary shaft and the chamfering tool can be suppressed, and suitable chamfering can be performed on the edge on the rear refracting surface side.

<Example>
Hereinafter, examples of the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a spectacle lens processing device 1 (hereinafter, abbreviated as processing device 1) according to this embodiment. FIG. 1A is a schematic configuration diagram when the processing apparatus 1 is viewed from the front. FIG. 1B is a schematic configuration diagram of the processing apparatus 1 when viewed from the side surface. A lens processing unit 10 for processing a lens is provided on the upper part of the processing apparatus. Further, on the side surface of the processing device 1, a display 5 having a touch panel function, a switch unit 7 provided with a processing start switch, and the like are provided.

FIG. 2 is a schematic configuration diagram of the lens processing unit 10. The lens processing unit 10 is provided with a lens chuck unit 20 and a spindle holding unit 30.

<Lens chuck unit>
The lens chuck unit 20 is for holding the spectacle lens LE (hereinafter, abbreviated as lens LE) and moving the lens LE with respect to the spindle holding unit 30. The lens chuck unit 20 includes a carriage 21 and a base 24. The carriage 21 includes a pair of first rotating shafts 22 (22F, 22R) for sandwiching and rotating the lens LE. The first rotating shaft 22 is rotated about a rotation center axis L2 (see FIG. 8), which will be described later.

FIG. 3 is a schematic configuration diagram of the lens chuck unit 20. A holding arm 29L that rotatably holds the first rotating shaft 22F is fixed to the front side of the carriage 21. On the back surface of the carriage 21, a chuck table 23 that can move on two guide rails extending to the left and right (not shown) is provided. A holding arm 29R that rotatably holds the first rotating shaft 22R is fixed to the chuck table 23. Further, the chuck table 23 is provided with a pressure drive source (not shown) for moving the chuck table 23 in parallel with the first rotating shaft 22. The pressure drive source is composed of an air pump, a valve, a piston and the like. An air pump is used to pump air. The piston is fixed to the chuck table 23. The valve is provided in a closed space where the piston is located. Then, the introduction of air into the enclosed space is adjusted by opening and closing the valve. The pressure drive source translates the piston with respect to the center of rotation axis L2 (see FIG. 8) by coordinating the introduction of air in a closed space. As a result, the holding arm 29R and the first rotating shaft 22R are translated together with the chuck table 23 toward the first rotating shaft 22F provided on the carriage 21. Then, the lens LE is sandwiched between the first rotating shaft 22F and the first rotating shaft 22R. The first rotary shaft 22F and the first rotary shaft 22R are arranged in a coaxial relationship.

The lens chuck unit 20 is provided with a drive source (for example, a motor) 110. The motor 110 is used to rotate the first rotary shaft 22R about its axis. By the rotational drive of the motor 110, the first rotary shaft 22R is rotated via a rotation transmission mechanism such as a timing belt and a pulley.

Further, the lens chuck unit 20 is provided with a drive source (for example, a motor) 120. The motor 120 is used to rotate the first rotary shaft 22F about its axis. By the rotational drive of the motor 120, the first rotary shaft 22F is rotated via a rotation transmission mechanism such as a timing belt and a pulley. Encoders that detect the angle of rotation of the first rotating shafts 22F and 22R are attached to the rotating shafts of the motors 110 and 120. The motors 110 and 120 are driven synchronously. That is, the first rotary shafts 22F and 22R are rotationally driven in synchronization with each other. These constitute a lens rotation unit.

<Carriage rotation drive mechanism>
The lens chuck unit 20 is provided with an axis angle changing mechanism 25. The shaft angle changing mechanism 25 is used for switching the processing tool and adjusting the relative positional relationship between the first rotating shaft 22 and the processing tool when processing the lens LE. The shaft angle changing means 25 may be used to adjust the relative positional relationship between the first rotating shaft 22 and the second rotating shaft 45c1 described later.

The shaft angle changing mechanism 25 includes a drive source (for example, a motor or the like) 26, a pulley 27, and a timing belt 28. A carriage 21 is fixed to the pulley 27. When the motor 26 is rotationally driven, the rotation of the motor 26 is transmitted to the pulley 27 via the timing belt 28. The carriage 21 is rotationally driven around the center axis (A axis) of the carriage 21 with respect to the base 24 by rotating the pulley 27. As a result, along with the rotational drive of the carriage 21, the axis angle of the first rotating shaft 22 is changed (rotated) around the A axis. In this embodiment, as the initial position at the start of rotation of the carriage 21, when the lens LE is sandwiched by the first rotating shafts 22F and 22R, the axial direction of the first rotating shafts 22F and 22R is the Y-axis direction. It is set at a position that is a parallel axis (see FIG. 11A). At this time, in the first rotary shafts 22F and 22R, the first rotary shaft 22R is positioned on the upper side and the first rotary shaft 22F is positioned on the lower side. That is, the concave surface (rear surface) of the lens LE is on the upper side, and the convex surface (front surface) of the lens LE is on the lower side. The first rotating shaft 22F is on the front side of the lens LE, and the first rotating shaft 22R is on the rear side of the lens LE.

<X-axis drive mechanism and Z-axis drive mechanism>
FIG. 4 is a diagram illustrating a drive mechanism of the lens chuck unit 20 in the X-axis direction and the Z-axis direction. The lens chuck unit 20 is provided with drive mechanisms (X-axis drive mechanism 80, Z-axis drive mechanism 85) for moving the lens chuck unit 20 in the X-axis direction and the Z-axis direction with respect to the spindle holding unit 30, respectively. There is. The X-axis drive mechanism 80 and the Z-axis drive mechanism 85 may be used to adjust the relative positional relationship between the first rotary shaft 22 and the second rotary shaft 45c1 described later.

The X-axis drive mechanism 80 includes a drive source (motor) 81. A shaft 82 extending in the X-axis direction is directly connected to the motor 81. Further, an encoder for detecting the moving position of the lens chuck unit 20 in the X-axis direction is attached to the rotating shaft of the motor 81. A screw groove is formed on the outer periphery of the shaft 82. A moving member (for example, a nut) 83 is fitted to the tip of the shaft 82 as a bearing. The moving member 83 is fixed to the lens chuck unit 20. When the motor 81 is rotationally driven, the lens chuck unit 20 moves along the shaft 82 extending in the X-axis direction. As a result, the first rotating shafts 22F and 22R are linearly moved in the X-axis direction together with the carriage 21.

The Z-axis drive mechanism 85 includes a drive source (motor) 86. A shaft (not shown) extending in the Z-axis direction is directly connected to the motor 86. Further, an encoder for detecting the moving position of the lens chuck unit 20 in the Z-axis direction is attached to the rotating shaft of the motor 86. A screw groove is formed on the outer circumference of the shaft. A moving member (for example, a nut) 87 is fitted to the tip of the shaft as a bearing. The moving member 87 is fixed to the lens chuck unit 20. When the motor 86 is rotationally driven, the lens chuck unit 20 moves along a shaft extending in the Z-axis direction. As a result, the first rotating shafts 22F and 22R are linearly moved in the Z-axis direction together with the carriage 21.

<Spindle holding unit>
In FIG. 2, the spindle holding unit 30 includes a moving support base 31, a first processing tool unit 40, a second processing tool unit 45, and a lens shape measuring unit 50 (hereinafter, abbreviated as measuring unit 50). A first processing tool unit 40 and a second processing tool unit 45 are arranged on the left and right side surfaces of the moving support base 31.

<Processing unit>
As shown in FIG. 2, the first processing tool unit 40 is arranged on the left side surface of the moving support base 31 and includes three spindles 40a, 40b, and 40c. Further, the second processing tool unit 45 is arranged on the right side surface of the moving support base 31, and includes three spindles 45a, 45b, and 45c. The spindles 40a, 40b, 40c of the first machining tool unit 40 have rotary shafts (machining tool rotary shafts) 40a1, 40b1, 40c1 for rotating the respective machining tools, and each of the spindles 40a, 40b1, 40c1 is coaxially added to the respective rotary shafts. Tools 60a, 60b, 60c are attached. Further, the spindles 45a, 45b, 45c of the second machining tool unit 45 have rotary shafts (machining tool rotary shafts) 45a1, 45b1, 45c1 for rotating the respective machining tools, and are coaxial with the respective rotary shafts. Each processing tool 65a, 65b, 65c is attached. Each processing tool is used as a processing tool for processing the lens LE. The rotary shaft of each spindle is rotated by a drive source (for example, a motor) arranged behind each spindle via a rotation transmission mechanism arranged inside each spindle.

For example, in this embodiment, the machining tool 60a is provided with an end mill or a cutter as a rough machining tool. The processing tool 60a is used for cutting an unprocessed lens LE before finishing processing. A cutter is arranged on the processing tool 60b as a grooving processing tool (grooving tool). The processing tool 60c is provided with an end mill as a hole processing tool for making a hole in the refracting surface of the lens LE.

Further, in the present embodiment, a mirror surface grindstone is arranged on the processing tool 65a as a mirror surface processing tool. The mirror surface processing tool is used to polish the mirror surface of the lens LE with water. A cutter having a conical shape is arranged in the processing tool 65b as a finishing processing tool. The processing tool 65b is formed with a bevel groove (V groove) for forming a bevel on the edge of the lens LE and a flat processing surface for flattening the peripheral edge of the lens LE, and is roughly processed. It is used for beveling and flattening the peripheral edge of the lens LE. That is, the processing tool 65b may be used as a flat finishing processing tool for finishing the peripheral edge of the lens LE into a lens shape, or as a bevel finishing processing tool for forming a bevel on the edge of the lens LE. May be done. Further, the processing tool 65b can also serve as a chamfering tool for chamfering the peripheral edge of the lens LE. A cutter is arranged on the processing tool 65c as a step-down processing tool. The step-down processing tool is used to form a stepped portion on the rear surface of a lens LE that has been flat-finished or bevel-finished. Further, the processing tool 65c can also serve as a chamfering processing tool for chamfering the peripheral edge of the lens LE, similarly to the processing tool 65b.

In this embodiment, the machining tool 65c is used as a chamfering tool, and the rotary shaft 45c1 (machine tool rotary shaft 45c1) to which the machining tool 65c is attached will be described as the second rotary shaft. Of course, the same can be described when the machining tool 65b is used as the chamfering tool and the rotary shaft 45b1 to which the machining tool 65b is attached is used as the second rotary shaft.

Hoses 41a, 41b, 41c, 46a, 46b, 46c for sending air or water are provided in the vicinity of each spindle, respectively. The hoses 41a, 41b, 41c, 46b, 46c are used to remove the machined cutting pieces of the lens LE by air. Further, the hose 46a is used to supply water used when processing the lens LE.

Each spindle is arranged so that the tip of the spindle is inclined downward (in the direction of gravity). In this embodiment, the degree of inclination of each spindle is arranged so as to be inclined downward by 45 ° from the Z-axis direction (horizontal direction).

<Y-axis drive mechanism>
FIG. 5 is a diagram illustrating a drive mechanism of the spindle holding unit 30 in the Y-axis direction. The spindle holding unit 30 is provided with each drive mechanism (Y-axis drive mechanism 90) for moving the spindle holding unit 30 with respect to the lens chuck unit 20 in the Y-axis direction. The Y-axis drive mechanism 90 may be used to adjust the relative positional relationship between the first rotary shaft 22 and the second rotary shaft 45c1.

The Y-axis drive mechanism 90 includes a drive source (motor) 91. A shaft 92 extending in the Y-axis direction is directly connected to the rotation shaft of the motor 91. Further, the motor 91 is equipped with an encoder that detects the moving position of the spindle holding unit 30 in the Y-axis direction. A screw groove is formed on the outer periphery of the shaft 92. A moving member (for example, a nut) 94 is fitted to the tip of the shaft 92 as a bearing. The moving member 94 is fixed to the moving support base 31. When the motor 91 is rotationally driven, the moving support 31 moves along a shaft extending in the Y-axis direction. As a result, the spindle holding unit 30 is linearly moved in the Y-axis direction. A spring (not shown) is applied to the moving support base 31 to cancel the downward load of the moving support base 31 so that the moving support base 31 can be easily moved.

In the configuration of the machining unit as described above, the X-axis moving mechanism 80, the Y-axis drive mechanism 90, and the Z-axis drive mechanism 85 are the first rotary shafts with respect to the rotary shafts (40a1, 40b1, 40c1, 45a1, 45b1, 45c1). A moving mechanism for changing the relative positional relationship of 22 is configured, and further, as the moving mechanism, a mechanism for changing the distance between each rotary shaft and the first rotary shaft 22 and a first rotary shaft 22 are provided. It constitutes a mechanism for moving the first rotary shaft 22 in the axial direction of the above.

<Lens shape measurement unit>
In FIG. 2, a measurement unit 50 (50F, 50R) and a drive mechanism 55 of the measurement unit 50 are provided above the carriage 21. The measuring units 50F and 50R are held so as to be slidable in the Z-axis direction. The measuring unit 50F detects the front position of the lens LE (the position on the front side of the lens on the lens shape). A stylus 51F is fixed to the tip of the measuring unit 50F, and the stylus 51F is in contact with the front surface of the lens LE. The measuring unit 50R detects the rear surface position of the lens LE (the position on the rear surface side of the lens on the lens shape). A stylus 51R is fixed to the tip of the measuring unit 50R, and the stylus 51R is in contact with the rear surface of the lens LE.

The drive mechanism 55 is used to move the measurement units 50F and 50R in the Z-axis direction. For example, the rotational drive of a motor (not shown) in the drive mechanism 55 is transmitted to the measurement units 50F and 50R via a rotation transmission mechanism such as a gear. As a result, the stylus 51F and 51R placed in the retracted position are moved to the lens LE side, and the measuring pressure for pressing the stylus 51F and 51R against the lens LE is applied. The configuration for pressing the stylus 51F and 51R is not limited to this. For example, there is a configuration in which the stylus 51F and 51R are pressed by using a spring.

When the front position of the lens LE is detected, the lens chuck shafts 22F and 22R are arranged in the Z-axis direction by the axis angle changing mechanism 25, and then the spindle holding unit 30 is rotated on the Y-axis while the lens LE is rotated based on the lens shape. The lens is moved in the direction, and an encoder (not shown) provided on the measuring unit 50F detects a position in the lens chuck axial direction on the front surface of the lens LE (a position on the front surface side of the lens on the lens shape). Further, also at the rear surface position of the lens LE, the position in the lens chuck axial direction on the rear surface of the lens LE (on the lens) by the encoder (not shown) provided on the measurement unit 50F in the same manner as when the front position of the lens LE is detected. The position on the rear surface side of the lens) is detected.

When measuring the edge position of the lens LE, the lens chuck shafts 22F and 22R are arranged in the Z-axis direction by the axis angle changing mechanism 25. After that, the stylus 51F comes into contact with the front surface of the lens LE, and the stylus 51R comes into contact with the rear surface of the lens LE. In this state, the spindle holding unit 30 moves in the Y-axis direction based on the lens shape data, and the lens LE is rotated, so that the edge positions of the front and rear surfaces of the lens LE for lens processing (lens chuck axis direction). Position) is measured at the same time. The stylus 51F and the stylus 51R may be integrally configured to be movable in the Z-axis direction. In this case, the edge positions are measured separately on the front surface and the rear surface of the lens LE. Further, in the above-mentioned measuring units 50F and 50R, the lens chuck shafts 22F and 22R are assumed to move in the Y-axis direction, but the stylus 51F and the stylus 51R are to be relatively moved in the Y-axis direction. You can also.

<Control means>
FIG. 6 is a control block diagram of the processing apparatus 1. The control unit 70 controls each unit of the processing apparatus 1. The control unit 70 may be configured to include a CPU (processor), RAM, ROM, and the like. For example, the CPU controls the drive of each member in the processing apparatus 1. For example, RAM temporarily stores various types of information. For example, the ROM stores a program or the like executed by the CPU. The control unit 70 may be composed of a plurality of control units (that is, a plurality of processors).

The control unit 70 includes a display 5, a switch unit 7, a motor 26, a motor 81, a motor 86, a motor 91, a motor 110, a motor 120, a motor (not shown) arranged inside each spindle, a pressure drive source (not shown), and measurement. Units 50F and 50R are connected. Further, the storage unit (memory) 3 and the host computer 1000 are connected to the control unit 70. The memory 3 may be a non-transient storage medium capable of retaining the storage contents even when the power supply is cut off. For example, as the memory 3, a hard disk drive, a flash ROM, a USB memory that can be attached to and detached from the processing device 1, and the like can be used. The host computer 1000 functions as a data input unit for inputting processing condition data necessary for processing the lens LE.

<Control operation>
Hereinafter, using the flowchart shown in FIG. 7, the processing apparatus 1 having the above configuration performs a step-down process for forming a stepped portion on the rear surface of the lens LE and a chamfering process for chamfering the edge on the rear refraction surface side of the lens LE. And, the control operation at the time of performing is described in order.

First, the operator sets the lens LE on the first rotating shaft 22F and selects a machining start switch (not shown). The control unit 70 translates the holding arm 29 and the first rotary shaft 22R toward the first rotary shaft 22F together with the chuck table 23 in response to an operation instruction of the machining start switch. As a result, the first rotating shaft 22F and the first rotating shaft 22R hold the lens LE.

<Acquisition of eyeglass data (S1)>
When the operator sets the lens LE, he / she operates the operation unit (display 5, switch unit 7, host computer 1000, etc.) to input eyeglass data. For example, the spectacle data includes lens shape data, step formation data for forming a step portion LS in step drop processing described later, layout data showing the positional relationship between the lens shape and the optical center of the lens LE, and the like. be. For example, the step formation data may be the thickness LSW of the protruding portion LS1 shown in FIG. 8, the cutting distance LSD, or the like. The control unit 70 acquires the lens shape data and the step formation data by reading these eyeglass data input by the operator. Further, the control unit 70 stores the acquired eyeglass data in the memory 3.

For example, the lens shape data may be the shape data of the rim in the spectacle frame acquired by using the apparatus or the like described in JP-A-2015-007536, or the method described in JP-A-2012-185490. It may be used as the external shape data of the demo lens acquired by the above. Further, for example, the thickness LSW of the protruding portion in the lens LE may be obtained by measuring the thickness of the protruding portion in the demo lens. Further, for example, the cutting distance LSD of the protruding portion in the lens LE may be obtained by measuring the groove depth of the rim in the spectacle frame.

<Acquisition of chamfer data (S2)>
Next, the operator operates the operation unit to input chamfer data required for chamfering the lens LE. For example, the chamfering data is a chamfering angle β (FIG. 9) which is an angle formed by the rotation center axis L2 of the first rotating shaft 22 and the processing tool surface of the chamfering tool (working tool 65c in this embodiment). (See), the chamfering amount M (see FIG. 10), which is the length of the machined surface in the lens LE after chamfering. For example, the chamfer angle β does not have to be the chamfer angle formed on the lens LE in the chamfering process described later. That is, the chamfering angle β does not have to be the same as the angle formed by the first surface P1 of the step portion LS described later and the processing tool surface of the processing tool 65c.

For example, the chamfered data may be configured such that the operator inputs an arbitrary value, or the operator may select one value from a plurality of options. Further, the chamfered data may be configured to automatically read out the chamfered data stored in the memory 3 in advance. Further, the chamfer data may be set based on the information regarding the shape of the edge surface, which will be described later. The control unit 70 sets the chamfer angle β and the chamfer amount M by reading and acquiring such chamfer data.

<Acquisition of lens shape data (S3)>
When the information necessary for processing the lens LE (that is, the lens shape data, the step formation data, the layout data, the chamfering data, etc.) is acquired as described above, the control unit 70 is based on the lens shape data. The lens shape of the lens LE is measured, and the lens shape data is acquired. For example, the lens shape data includes position information corresponding to the lens shape on the front refraction surface and the back refraction surface of the lens LE, curve information (tilt information) on the front refraction surface of the lens LE, and the like.

The control unit 70 moves the carriage 21 by controlling each drive mechanism (that is, the X-axis drive mechanism 80, the Y-axis drive mechanism 90, and the Z-axis drive mechanism 85) in the spindle holding unit 30, and the measurement unit 50. The lens LE is placed at the position of. Further, the control unit 70 adjusts the shaft angle of the first rotating shaft 22 by controlling the shaft angle changing mechanism 25. Further, the control unit 70 moves the stylus 51F and 51R by controlling the drive mechanism 55 of the measurement unit 50 to change the lens shape in the rotation center axis L2 direction on the front refraction surface and the rear refraction surface of the lens LE. Measure. The lens shape data measured in this way is stored in the memory 3 by the control unit 70.

<Acquisition of information on the shape of the edge surface (S4)>
The control unit 70 acquires information regarding the shape of the edge surface of the lens LE. For example, the information regarding the shape of the edge surface of the lens LE is the inclination angle of the edge surface, the thickness of the edge surface, and the like. For example, the control unit 70 may acquire the tilt angle of the edge surface with respect to the rotation center axis L2 of the lens LE at the position of each radius angle of the lens shape data. The position of each radius angle is an interval of a predetermined angle from the position of the radius angle of 0 degrees in the lens shape data (for example, an interval of 0.18 degrees, an interval of 0.36 degrees, 1 degree). It may be a position at intervals (such as every interval). Of course, the positions may be continuously connected. Further, for example, the control unit 70 may acquire the thickness of the edge surface based on the detection signals detected by the stylus 51F and 51R.

<Roughing (S5)>
When the lens shape data is acquired, the peripheral edge of the lens LE is roughly processed in order to cut off an unnecessary portion of the unprocessed lens LE. In the roughing process, the outside is cut by a predetermined distance (for example, 1 mm or the like) with respect to the ball shape, and a finishing allowance for the finishing process to be performed later is secured. For example, the control unit 70 predicts the shape of the lens LE formed by such rough processing, and calculates this as rough processing shape data. The rough processing shape data is obtained based on the ball shape data and the layout data. Further, for example, in order to process the lens LE according to the rough processing shape data, the control unit 70 calculates the rough processing control data for controlling each drive mechanism of the spindle holding unit 30 and the axis angle changing mechanism 25.

Based on the roughing control data, the control unit 70 moves the carriage 21 so that the lens LE is arranged at the position of the processing tool 60a, and the first rotating shaft so that the front surface of the lens LE faces the processing tool 60a side. 22 is rotated by a predetermined angle. Further, the control unit 70 adjusts the relative positional relationship of the first rotating shaft 22 with respect to the machining tool 60a (rotation axis of the machining tool 60a) based on the rough machining control data. For example, roughing is performed in this way, and an unnecessary portion of the lens LE is cut off.

<Flat finish processing (S6)>
When the roughing is completed, a flat finishing process is performed to smooth the peripheral edge of the roughened lens LE. The control unit 70 predicts the shape of the lens LE formed by the flat finish processing, and calculates this as the flat finish processing shape data. For example, the flat finish processing shape data is calculated based on the ball shape data, the layout data, and the information regarding the shape of the edge surface. Further, for example, in order to process the lens LE according to the flat finish processing shape data, the control unit 70 calculates the flat finish processing control data for controlling each drive mechanism of the spindle holding unit 30 and the axis angle changing mechanism 25.

The control unit 70 moves the carriage 21 so that the lens LE is arranged at the position of the processing tool 65b based on the flat finish processing control data, and the first unit is such that the front surface of the lens LE faces the processing tool 65b side. The rotary shaft 22 is rotated by a predetermined angle. Further, the control unit 70 adjusts the relative positional relationship of the first rotating shaft 22 with respect to the machining tool 65b (rotation axis of the machining tool 65b) based on the flat finish machining control data. For example, the flat finishing process is performed in this way, and the edge surface of the lens LE can be smoothed.

<Step drop processing (S7)>
When the flat finishing process is completed, the rear surface of the lens LE is stepped down in order to form the stepped portion LS on the lens LE. FIG. 8 is a side view of the lens LE when the step drop processing is performed. In the step-down process, the rear surface of the lens LE is scraped by the processing tool 65c to form a stepped portion LS. On the wall surface of the stepped portion LS, a first surface P1 in contact with the rear refraction surface Lb of the lens LE and a second surface P2 in contact with the edge surface Lc of the lens LE are formed. As a result, the front surface of the lens LE protrudes, and the protruding portion LS1 is formed.

For example, the control unit 70 predicts the shape of the lens LE formed by the step-down processing, and calculates this as the step-down processing shape data. For example, the step drop processing shape data is calculated based on the above-mentioned spherical shape data, step formation data, and the like. Further, for example, the control unit 70 calculates the step-down processing control data for controlling each drive mechanism of the spindle holding unit 30 and the shaft angle changing mechanism 25 in order to process the lens LE according to the step-down processing shape data.

The control unit 70 moves the carriage 21 so that the lens LE is arranged at the position of the processing tool 65c based on the step drop processing control data, and the processing tool surface of the processing tool 65c and the edge surface of the lens LE are parallel to each other. The first rotary shaft 22 is rotated by a predetermined angle so as to be (substantially parallel). Further, the control unit 70 adjusts the relative positional relationship between the machining tool 65c (rotation center axis L1 of the machining tool 65c) and the first rotary shafts 22F and 22R based on the step-down machining data.

For example, in this embodiment, the end portion t1 on the root side of the processing tool 65c is located at a position separated from the position of the front refracting surface La corresponding to the lens shape of the lens LE and the thickness LSW of the protruding portion LS1. Is adjusted to. There are two ends on the root side of the processing tool 65c, but in this embodiment, the one closer to the lens LE is referred to as the root side end t1. The control unit 70 adjusts the distance of the first rotating shaft 22 with respect to the rotation center axis L1 of the processing tool 65a based on the lens shape of the lens LE and the cutting distance LSD. As a result, the portion shown by the diagonal line in FIG. 8 is scraped by the processing tool 65c, and the rear surface of the lens LE is subjected to step-down processing. In the lens LE after the step drop processing, an edge Ea on the edge surface side and an edge Eb on the rear refraction surface side are formed on the stepped portion LS.

For example, since the processing tool 65c in this embodiment has a cylindrical processing surface, the angle γ formed by the first surface P1 and the second surface P2 of the stepped portion LS is 90 degrees. Of course, the angle γ may be larger or smaller than 90 degrees. For example, when the angle γ is made larger than 90 degrees, the intersection K of the first surface P1 and the second surface P2 is made to coincide with the end portion t1 on the root side of the processing tool, and then the intersection K is used as the base point. The first rotating shaft 22 may be tilted by a predetermined angle. Further, for example, in this case, the intersection point between the end portion t1 on the root side of the processing tool and the first surface P1 and the second surface P2 in a state where the rotation center axis L2 of the first rotation shaft 22 is tilted in advance. K may be matched with. For example, when the angle γ is made smaller than 90 degrees, step-down processing may be performed using a processing tool having a tapered processing surface.

Further, in the present embodiment, by applying the processing tool 65c to the lens LE once, a stepped portion having an angle γ is formed on the rear surface of the lens LE, but the present invention is not limited to this. For example, the processing tool 65c may be applied to the lens LE in a plurality of times to form a stepped portion having an angle γ on the rear surface of the lens LE.

<Chamfering (S8)>
When the step-down process is completed, the chamfering process is started in order to scrape the edge Eb on the rear refracting surface side in the stepped portion LS. For example, in this embodiment, chamfering is performed on the lens LE by using the processing tool 65c (that is, the step-down processing tool). That is, the processing tool 65c performs a step-down process on the lens LE and chamfers the edge on the rear refraction surface side of the lens LE.

For example, the control unit 70 predicts the shape of the lens LE formed by chamfering, and calculates this as chamfering shape data. For example, the chamfered shape data is calculated based on the above-mentioned chamfered data, step-down processed shape data, and the like. For example, by this, the chamfer angle β, the chamfer amount M, the position of the edge Ea on the edge surface side and the edge Eb on the rear refraction surface side in the stepped portion LS, the position of the intersection K between the first surface P1 and the second surface P2, Etc. are acquired. Further, for example, the control unit 70 calculates chamfering control data for controlling each drive mechanism of the spindle holding unit 30 and the axis angle changing mechanism 25 in order to process the lens LE according to the chamfering shape data.

For example, based on the chamfering processing data, the control unit 70 sets the first rotating shaft 22 and the second rotating shaft 45c1 so that the processing tool 65c does not come into contact with the portion other than the edge Eb on the rear refracting surface side of the lens LE. Chamfering is performed by adjusting the relative positional relationship. For example, in this embodiment, the relative positional relationship between the first rotating shaft 22 and the second rotating shaft 45c1 is adjusted so that the processing tool 65c and the edge Ec on the edge surface side of the stepped portion LS do not come into contact with each other. You may. FIG. 9 shows the positional relationship between the processing tool 65c and the lens LE during chamfering. For example, in the control unit 70, the end portion t of the processing tool 65c is on the edge surface Lc side of the first surface P1 formed on the stepped portion LS, and is closer to the edge surface Lc side than the first surface P1 formed on the stepped portion LS. It may be controlled so that it is arranged within the range on the rear refraction surface Lb side (within the range R shown by the diagonal line in FIG. 9). In other words, the control unit 70 is in a state where the end portion t of the processing tool 65c is arranged within the range R of the angle γ formed by the first surface P1 and the second surface P2 formed on the stepped portion LS. It may be controlled to.

The end portion t of the processed portion 65c in this embodiment is an end portion t1 on the root side located closer to the lens LE and an end portion t2 on the upper surface side (tip side). For example, the control unit 70 rotates the first rotation shaft 22 and the second rotation in the direction in which the intersection K of the first surface P1 and the second surface P2 of the stepped portion LS and the end portion t of the machined portion 65c coincide with each other. Adjust the relative positional relationship with the shaft 45c1.

For example, when the relative positional relationship is adjusted in the direction in which the end portion t1 on the root side of the processing portion 65c and the intersection K of the first surface P1 and the second surface P2 coincide with each other, the processing tool 65c It is preferable that the rotary shaft (machine rotation shaft) 45c1 of the above is controlled so as to extend in a direction away from the first rotary shaft 22 (rotation center axis L2 of the first shaft 22). The state of extending in the direction away from the first rotating shaft 22 means that the processing tool surface of the processing tool 65c is close to the first rotating shaft 22, and the second rotating shaft 45c1 of the processing tool 65c is far from the first rotating shaft 22. It is in a stretched state.

Further, for example, when the relative positional relationship is adjusted in the direction in which the end portion t2 on the upper surface side of the processed portion 65c and the intersection K of the first surface P1 and the second surface P2 coincide with each other, the addition is added. It is preferable that the rotary shaft (machine rotation shaft) 45c1 of the tool 65c is controlled so as to extend in a direction approaching the first rotary shaft 22 (rotation center axis L2 of the first shaft 22). The state of extending in the direction approaching the first rotary shaft 22 means that the machining tool surface of the machining tool 65c is far from the first rotary shaft 22, and the second rotary shaft 45c1 of the machining tool 65c is far from the first rotary shaft 22. It is in a stretched state.

Hereinafter, the end portion t1 on the root side of the processing tool 65c is controlled so as to be arranged in the range R, and the end portion t1 and the intersection K between the first surface P1 and the second surface P2 are formed. The chamfering process will be described in more detail by taking as an example the case where the relative positional relationship between the first rotating shaft 22 and the second rotating shaft 45c1 is adjusted in the matching direction. Although the description is omitted in this embodiment, the same can be considered even in the case of controlling so that the end portion t2 on the upper surface side of the processing tool 65c is arranged in the range R. ..

For example, when the control unit 70 tilts the first rotary shaft 22 by the set chamfer angle β, the first rotary shaft is positioned so that the end portion t1 on the root side of the tool 65c is located within the above-mentioned range R. Move 22. For example, at this time, the control unit 70 may move the first rotary shaft 22 so that the end portion t1 on the root side of the processing tool 65c comes to the initial position. For example, in this case, the initial position of the end portion t1 on the root side may be a preset position in the range R, or an optimum position in the range R calculated from the chamfered shape data (for example, the first position). It may be a position where the movement of the one-turn shaft 22 is minimized). That is, the initial position of the end portion t1 on the root side may be arranged at any position as long as it is within the range R.

The end portion t2 on the root side of the processing tool may be located within the above range R during chamfering. For example, the chamfering process is a state in which the chamfering sequence has started. That is, the term “during chamfering” includes adjusting the position of the shaft or the like in order to perform chamfering by using the processing tool 65c arranged at the initial position.

Subsequently, the control unit 70 moves the first rotation shaft 22 so that the intersection K of the first surface P1 and the second surface P2 in the lens LE is directed to the end portion t1 on the root side of the processing tool 65c. .. For example, in this case, the control unit 70 has the first rotating shaft so that the distance between the intersection K of the first surface P1 and the second surface P2 and the end portion t1 on the root side of the processing tool 65c is the shortest. 22 may be moved. That is, for example, the control unit 70 is along a straight line (dotted line d shown in FIG. 9) connecting the end portion t1 on the root side of the processing tool 65c and the intersection K between the first surface P1 and the second surface P2. The first rotating shaft 22 may be controlled so that the intersection K moves. As a result, the processing tool surface of the processing tool 65c can be brought into contact with the edge Eb on the rear refraction surface side of the lens LE without the processing tool 65c coming into contact with the edge Ec on the edge surface side of the lens LE.

FIG. 10 is a diagram showing a lens LE after chamfering. For example, the control unit 70 moves the first rotation shaft 22 and sets the intersection K of the first surface P1 and the second surface P2 in the lens LE to the position where the set chamfer amount M is set on the root side of the processing tool 65c. Head towards the end t1 of. As a result, the portion shown by the diagonal line in FIG. 10 is scraped by the processing tool 65c, and the edge Eb on the rear refraction surface side formed by the step-down processing is chamfered. For example, in the control unit 70, when the first rotary shaft 22 is moved, the intersection K formed by the first surface P1 and the second surface P2 coincides with the end portion t1 on the root side of the processing tool 65c. The position to be used may be set as the limit position at the time of movement.

As described above, for example, the spectacle lens processing apparatus in the present embodiment adjusts the relative positional relationship between the first rotating shaft and the second rotating shaft based on the set chamfer angle. As a result, in the stepped portion formed by the step-down processing, the edge on the refracting surface side can be chamfered with high accuracy.

Further, for example, in the spectacle lens processing apparatus of the present embodiment, the edge on the rear refracting surface side of the spectacle lens is chamfered by using a step-down processing tool. As a result, it is not necessary to separately provide a processing tool for chamfering, and the processing of the spectacle lens can be efficiently advanced.

Further, for example, in the spectacle lens processing apparatus of the present embodiment, the relative positions of the first rotating shaft and the second rotating shaft are prevented so that the chamfering tool and the edge on the edge surface side of the step portion do not come into contact with each other. Adjust the relationship. This makes it possible to chamfer the edge of the stepped portion on the rear refracting surface side without deforming the protruding portion formed by the step-down process.

Further, for example, in the spectacle lens processing apparatus of the present embodiment, at the time of chamfering, the end portion of the chamfering tool is formed on the edge surface side of the first surface formed on the stepped portion and is formed on the stepped portion. It is controlled so that it is arranged within the range on the rear refracting surface side of the second surface. As a result, when chamfering the edge on the rear refracting surface side, it is possible to prevent the chamfering tool from coming into contact with the edge on the edge surface side and scraping the edge on the edge surface side.

Further, for example, the spectacle lens processing apparatus in the present embodiment is on the edge surface side of the first surface formed in the step portion, and is within the range of the rear refraction surface side of the second surface formed in the step portion. When the end portion on the root side of the chamfering tool is arranged, the processing tool rotation axis of the chamfering tool is controlled so as to extend in a direction away from the first rotating shaft. As a result, it is possible to prevent the edge on the edge surface side from being scraped when chamfering the edge on the rear refraction surface side, and it is possible to further suppress the interference between the first rotating shaft and the second rotating shaft.

Further, for example, in the spectacle lens processing apparatus of the present embodiment, the first rotating shaft and the second rotating shaft are in the direction in which the intersection formed by the first surface and the second surface and the end portion of the chamfering tool coincide with each other. Adjust the relative positional relationship with. For example, by using the positions of the intersection formed by the first surface and the second surface and the end of the chamfering tool for such adjustment, the machining position of the chamfering tool can be newly obtained by calculation. It is possible to chamfer the edge on the rear refraction surface side without performing complicated control such as processing the spectacle lens using the position.

Further, for example, the spectacle lens processing apparatus in the present embodiment acquires information on the shape of the edge surface of the spectacle lens, and sets the chamfer angle based on the information. As a result, an appropriate chamfering angle can be set for each radial angle of the ball shape, and the edge on the rear refracting surface side can be chamfered.

<Example of transformation>
In this embodiment, when the shape of the lens LE after the flat finish processing (that is, the lens shape) is smaller than the predetermined shape, the first rotating shaft 22 holding the lens LE and the processing tool 65c are used. May interfere with chamfering. FIG. 11 is a diagram illustrating the positional relationship between the first rotating shaft 22 holding the lens LE having a small lens shape and the processing tool 65c. For example, the control unit 70 moves the first rotary shaft 22 so that the end portion t1 on the root side of the machining tool 65c tilted by the set chamfer angle β is within the range R, and then sets the intersection point K. The relative positional relationship between the first rotating shaft 22 and the second rotating shaft 45c1 is adjusted along the straight line d connecting the end portion t1. For example, at this time, if the first rotating shaft 22 interferes with the end portion t2 on the upper surface side of the processing tool 65c, the edge Eb on the rear refracting surface side cannot be chamfered with the set chamfering amount.

Therefore, in the present embodiment, the control unit 70 may determine whether or not the machining tool 65c comes into contact with the first rotary shaft 22 before the start of chamfering. For example, the determination process is performed based on the chamfering shape data and the chamfering control data. Further, for example, in the present embodiment, the control unit 70 may be configured to correct at least one of the chamfer angle β and the chamfer amount M based on such a determination result. For example, when correcting the chamfering angle β, the control unit 70 calculates an angle at which chamfering can be performed with the set chamfering amount M and the machining tool 65c does not contact the first rotating shaft 22, and chamfering is performed according to this angle. The angle β may be corrected. Further, for example, when correcting the chamfering amount M, the control unit 70 obtains a chamfering amount that can be chamfered at the set chamfering angle β and that the processing tool 65c does not contact the first rotating shaft 22 by calculation, and this angle. The chamfer amount M may be corrected according to the above. Of course, the control unit 70 may calculate the angle at which the tool 65c does not contact the first rotating shaft 22 and the chamfering amount, and may correct both the chamfering angle β and the chamfering amount M accordingly.

As described above, for example, the spectacle lens processing apparatus in the present embodiment determines whether or not the chamfering tool comes into contact with the first rotating shaft, and based on the determination result, at least one of the chamfering angle and the chamfering amount. To correct. As a result, the contact between the first rotary shaft and the chamfering tool can be suppressed, and suitable chamfering can be performed on the edge on the rear refracting surface side.

In this embodiment, the chamfer angle β is set for each radius angle of the lens shape in the lens LE, but the present invention is not limited to this. For example, the chamfer angle β may be set uniformly with respect to the lens shape in the lens LE.

Further, in this embodiment, the chamfer angle β is set to the angle formed by the rotation center axis L2 of the first rotating shaft 22 and the processing tool surface of the processing tool 65c, but the present invention is not limited to this. As for the chamfer angle, it suffices if the relative inclination relationship between the lens LE and the processing tool 65c can be obtained. FIG. 12 is a diagram showing an example of change in the chamfer angle. For example, in this case, the chamfer angle β may be the angle β ′ formed by the rotation center axis L2 of the first rotation shaft 22 and the rotation center axis L1 of the processing tool 65c. In this embodiment, the processing tool 65c has a cylindrical shape, and the processing tool surface of the processing tool 65c and the rotation center axis L1 of the processing tool 65c are parallel to each other. That is, the chamfer angle β and the chamfer angle β'are equal to each other.

In this embodiment, the second rotating shaft (machining tool rotating shaft) 45c1 of the machining tool 65c extends linearly from the spindle holding unit 30, but the present invention is not limited to this. For example, when the end portion t1 on the root side of the processing tool 65c is arranged within the range R and the intersection K between the first surface P1 and the second surface P2 is adjusted in the direction of matching the end portion t1, the first It is preferable that the shape of the second rotating shaft is such that the interference between the rotating shaft 22 and the second rotating shaft 45c1 (interference between the holding arm 29 and the spindle 45c) can be further suppressed. Similarly, for example, when the end portion t2 on the upper surface side of the processing tool 65c is arranged within the range R and the intersection K between the first surface P1 and the second surface P2 is adjusted in the direction to coincide with the end portion t2. It is preferable that the shape of the second rotary shaft is such that the interference between the first rotary shaft 22 and the second rotary shaft 45c1 can be further suppressed.

For example, the shape of the second rotary shaft 45c1 may be such that the second rotary shaft 45c1 (or the spindle 45c) extends from the spindle holding unit 30 in a curved shape or in an L shape. good. Of course, the rotation shaft (rotating shaft of the processing tool) of each processing tool may have the above-mentioned shape, not limited to the second rotating shaft 45c1 of the processing tool 65c.

In this embodiment, the relative positional relationship between the first rotary shaft 22 and the second rotary shaft 45c1 is determined by moving the first rotary shaft 22 in each machining step such as step-down machining and chamfering. The configuration to be adjusted has been described as an example, but the present invention is not limited to this. For example, the second rotary shaft 45c1 may be movably arranged, and by moving the second rotary shaft 45c1, the relative positional relationship between the first rotary shaft 22 and the second rotary shaft 45c1 may be adjusted. Of course, the relative positional relationship between the first rotary shaft 22 and the second rotary shaft 45c1 may be adjusted by moving both the first rotary shaft 22 and the second rotary shaft 45c1.

In this embodiment, a configuration in which the processing tool 65c (step-down processing tool) is also used as the chamfering processing tool has been described as an example, but the present invention is not limited to this. The chamfering tool may be configured to be used in combination with another tool. For example, in this case, the processing tool 45b (finishing processing tool) may also be used. Of course, the chamfering tool may not be used as the step-down machining tool or the finishing tool, but may be provided separately.

In the spectacle lens processing apparatus 1 of the present embodiment, the edge Eb on the rear refracting surface side is chamfered by adjusting the relative positional relationship between the first rotating shaft 22 and the second rotating shaft 45c1. It is good if it is possible. For example, in such a case, the control unit 70 may move any of the processing tool surfaces of the processing tool 65c toward the edge Eb on the rear refraction surface side. Further, for example, in such a case, as described in this embodiment, the control unit 70 is within the range R of the angle γ formed by the first surface and the second surface formed on the lens LE by the step-down process. The end portion t of the processing tool 65c may be moved in a direction that coincides with the intersection K formed by the first surface P1 and the second surface P2.

In this embodiment, a configuration in which the edge Eb on the rear refraction surface side formed by the step-down process is chamfered has been described as an example, but the present invention is not limited to this. For example, even for a lens LE in which a bevel finish process is performed after rough processing and a bevel is raised on the edge surface, the rear refraction is performed by adjusting the relative positional relationship between the first rotary shaft 22 and the rotary shaft 45b1. The edge on the surface side may be chamfered.

The technique of the present disclosure is not limited to the application to the spectacle lens processing apparatus provided with the configuration of the present embodiment. For example, it can be applied to a device having a grindstone for forming a stepped portion on the lens LE, as described in Japanese Patent Application Laid-Open No. 2015-131374.

1 Eyeglass lens processing device 3 Memory 5 Display 7 Switch part 10 Lens processing part 21 Rotation base (carriage)
20 Lens chuck unit 22 1st rotary shaft 25 Shaft angle change mechanism 30 Spindle holding unit 40 1st machining tool unit 45 2nd machining tool unit 45c Spindle 45c1 2nd rotary shaft 50 Lens shape measurement unit 60c Step-down machining tool, chamfering Tool 70 Control unit 80 X-axis drive mechanism 85 Z-axis drive mechanism 90 Y-axis drive mechanism

Claims (3)

The first rotating shaft for holding and rotating the spectacle lens,
A chamfering tool for chamfering the peripheral edge of the spectacle lens,
The second rotating shaft to which the chamfering tool is attached and
It is a spectacle lens processing device that has
A chamfering angle setting means for setting a chamfering angle, which is an angle formed by the rotation center axis of the first rotating shaft and the processing tool surface of the chamfering tool.
An adjusting means for adjusting the relative positional relationship between the first rotating shaft and the second rotating shaft based on the chamfering angle, and
It is a control means for chamfering the edge on the rear refracting surface side in the stepped portion formed by performing the step-down processing on the rear surface of the spectacle lens with the chamfering tool adjusted by the adjusting means. A control means for adjusting the relative positional relationship between the first rotating shaft and the second rotating shaft so that the processing tool and the edge on the edge surface side of the step portion do not come into contact with each other .
Equipped with
In the control means, at the time of chamfering, the end portion of the chamfering tool is on the edge surface side of the first surface formed on the step portion, and the end portion is closer to the edge surface side than the second surface formed on the step portion. A spectacle lens processing device characterized in that it is controlled so as to be arranged within the range on the rear refracting surface side . In the spectacle lens processing apparatus of claim 1,
The chamfering tool is a step-down processing tool for performing the step-down processing on the spectacle lens.
The step-down processing tool is a spectacle lens processing apparatus characterized in that the spectacle lens is subjected to the step-down processing and the edge on the rear refraction surface side of the spectacle lens is chamfered. The first rotating shaft for holding and rotating the spectacle lens,
A chamfering tool for chamfering the peripheral edge of the spectacle lens,
The second rotating shaft to which the chamfering tool is attached and
It is a spectacle lens processing program executed in the spectacle lens processing apparatus having the above.
By being executed by the processor of the spectacle lens processing device,
A chamfering angle setting step for setting a chamfering angle, which is an angle formed by the rotation center axis of the first rotating shaft and the processing tool surface of the chamfering tool.
An adjustment step for adjusting the relative positional relationship between the first rotating shaft and the second rotating shaft based on the chamfering angle, and
This is a control step for chamfering the edge on the rear refracting surface side of the stepped portion formed by performing the step-down process on the rear surface of the spectacle lens with the chamfering tool adjusted by the adjusting step. A control step for adjusting the relative positional relationship between the first rotating shaft and the second rotating shaft so that the processing tool and the edge on the edge surface side of the step portion do not come into contact with each other.
Is executed by the spectacle lens processing device.
In the control step, at the time of chamfering, the end portion of the chamfering tool is on the edge surface side of the first surface formed on the step portion, and the end portion is closer to the edge surface side than the second surface formed on the step portion. A spectacle lens processing program characterized in that the lens is controlled so as to be arranged within the range on the rear refracting surface side.

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