JP2594694B2 - Oscillating device for polishing dish in polishing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention has a function of correcting and changing abrasion of a polishing dish caused by polishing of a lens or the like. The present invention relates to a swinging device for a polishing dish in a polishing device that can be held.

[Prior Art] Polishing of a material to be polished such as a lens which has been generally used in the past is performed by using a polishing apparatus 1a as shown in FIG. A method of setting the swing width (for example, an angle of about 5 to 15 degrees) of the plate 3 and rotating and swinging the polishing plate 3 to perform polishing with the polishing plate 3 is adopted. That is, the polishing apparatus 1a presses the lens 5 and the like on the polishing plate 3 with the holder 4, and the polishing plate 3 is attached to the swing base 7 so as to be rotatable. The swing base 7 is mounted on a frame (not shown) so as to be swingable about the swing center axis 8 of the swing base 7 so that the swing base 7
It is configured to be swung by 31. Further, the polishing apparatus 1a changes the swing angle of the swing base 8 by rotating the handle 32 to move the crank 31 back and forth,
The position of the lens 5 and the like on the polishing plate 3 can be changed by this angle change. Therefore, the polishing plate 3 of the polishing apparatus 1a is caused to oscillate in a cycle as shown in FIG.

[Problems to be solved by the invention]

However, when the lens 5 and the like are polished by the above-described polishing apparatus 1a, the polishing plate 3 is gradually worn together with the lens 5 and the like, and the spherical accuracy of the lens 5 and the like changes. For this reason, the operator turns the handle 32 while considering the change of the polishing plate 3, moves the crank 31 back and forth to change the swing angle of the swing base 7, and
It is necessary to change the position of the polishing plate 3 to be applied to the lens 5 little by little in order to pursue the spherical precision of the lens 5 and the like, and the handling operation becomes complicated, and a high degree of skill is required.

Also, by moving the position of the polishing plate 3 on which the lens 5 or the like hits, the lens 5 or the like does not have a correct spherical surface. And ass means a phenomenon in which the spherical surface of the lens becomes elliptical.)

Accordingly, the present invention has been made in view of the above circumstances, and can maintain the curved surface accuracy of a material to be polished such as a lens without particularly complicated operation and skill, and can generate a habit and the like. It is an object of the present invention to provide a rocking device capable of preventing the occurrence of the vibration.

[Means for solving the problem]

The present invention has been developed in order to solve the problems as described above, and a polishing apparatus for polishing and polishing a workpiece by rotating and swinging the polishing dish while pressing the workpiece on the polishing dish. A swinging device comprising a driven portion, a driving portion, and a control portion, wherein a pulley is used for the driven portion and fixed to a swinging central axis, and the driving portion is capable of rotating during forward and reverse rotations and during the forward and reverse rotation. A servomotor that can be stopped for a set time at a point, and a pulley having a smaller diameter than the pulley of the driven unit is fixed to the rotation axis of the servomotor. Further, the control unit is a control rotation cycle setting unit of the drive unit. A stop range setting unit for stopping the swinging motion of the polishing dish at a predetermined position on the swing locus for a set time depending on the condition of the polishing dish worn due to the polishing is connected to the arithmetic unit, and the output unit is connected to the arithmetic unit. Configuration The present invention provides a polishing dish swinging device in a polishing apparatus, and further includes a display unit for displaying these in a forward / reverse rotation cycle and a stop range setting unit of the control unit, and further includes a forward / reverse rotation of the control unit. It is an object of the present invention to provide a polishing plate swinging device in a polishing device in which a cycle setting unit can freely set a forward / reverse rotation amount and a forward / reverse rotation speed of a servomotor.

[Action]

According to the swinging device of the polishing dish in the polishing apparatus having the above configuration, the swinging width of the polishing dish is set, and the polishing dish is rotated and swung to grind the material to be polished. Depending on the condition of the polishing plate, the swinging motion of the polishing plate is stopped for a set time at the set position of the swing locus, and the polishing plate at the stop position is worn to maintain and correct the spherical accuracy of the polishing plate and to correct the workpiece. The spherical accuracy can be maintained and corrected.

Further, the control unit specifies the forward / reverse rotation cycle to operate the driving unit, and further transmits this operation via the driven unit and the swing base to swing the polishing plate to polish the workpiece, and The control unit specifies the stop time during the forward / reverse rotation cycle according to the wear condition of the polishing plate and operates the drive unit to maintain and correct the spherical accuracy of the polishing plate to maintain the spherical accuracy of the workpiece. Can be corrected.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 is a partial cross-sectional side view showing a mechanism of a swinging device (hereinafter simply referred to as a swinging device) of a polishing dish in a polishing device of the present invention, and FIG. 2 is a configuration of a control unit of the swinging device. FIG. 3, FIG. 3 and FIG. 4 are explanatory diagrams each showing an operating state of the rocking device. In the figure, reference numeral 1 denotes a polishing device, in which a swinging device 2 for a polishing plate 3 is incorporated.

The polishing apparatus 1 presses a lens (a material to be polished) 5 held on a polishing plate 3 by a holder 4, rotates a spindle 6 screwed to the polishing plate 3 in this state,
A lens (a material to be polished) is formed by a swinging device 2 having a swing base 7 which rotatably holds the spindle 6.
5 is to be polished. The swinging device 2 has a driven portion 9 provided on a swinging central shaft 8 of a swing base 7 for rotatably holding the polishing plate 3, and enables the driven portion 9 to rotate forward and reverse and stop for a set time. A drive unit 10, a belt 11 for transmitting the operation of the drive unit 10, and a control unit 12 for arbitrarily controlling the forward / reverse rotation cycle and the stop range of the drive unit 10, respectively.
It is composed of

In the present embodiment, a pulley is used for the driven portion 9. The follower 9 is fixed to the swing center shaft 8 as described above, and swings the swing base 7 by receiving forward and reverse rotations of the drive unit 10.

The drive unit 10 has a servomotor 13 that can be stopped for a set time at any point during forward / reverse rotation and forward / reverse rotation, and a rotation shaft 14 of the servomotor 13
Pulley 15 to transmit its operation to the pulley that is
Is fixed. The pulley 15 is smaller in diameter than the pulley that is the normal driven portion 9. This is because the swinging movement of the polishing dish 3 does not require much speed.

In the oscillating device 2 of the present embodiment, the driven portion 9 uses a pulley, and the driving portion 10 uses a servomotor 13 and a pulley 15, but the present invention is not limited to these.

The driven unit 9 may be any unit that can rotate the swing center axis 8 of the swing base 7 in the normal and reverse directions to cause the polishing plate 3 to swing, and the drive unit 10 performs the normal and reverse rotations and the normal and reverse rotations thereof. It is sufficient that the motor can be stopped for a set time at an arbitrary point, and a pulse motor may be used in addition to the servo motor. Therefore, the pulley 15 of the driven portion 9 and the drive portion 10 may be a sprocket, and in this case, the belt 11 becomes a chain. Further, the pulley 15 of the driven unit 9 and the driving unit 10 may be a gear, and in this case, the belt 11 is an intermediate gear. When the gear as the driven portion 9 and the gear as the pulley 15 directly mesh with each other, the intermediate gear corresponding to the belt 11 is not required.

As shown in FIG. 2, the control unit 12 includes a forward / reverse rotation cycle setting unit 16 and a stop range setting unit (timer) 17 of the driving unit 10 electrically connected to a calculation unit 18. The output unit 19 is connected. The forward and reverse rotation cycle and stop range setting sections 16 and 17 have these display sections 16
a and 17a are attached. Forward / reverse rotation cycle setting section 16
Is the swing width l (mm) as shown on the vertical axis of FIGS. 5 (2), 3 (2) and 4 (2), that is, the forward / reverse rotation amount of the servo motor 13 can be freely adjusted. The servomotor 13 can be set freely, and the swinging motion cycle (second) of the horizontal axis, that is, the forward / reverse rotation speed of the servomotor 13 can be set freely. The stop range setting unit 17 stops the servomotor 13 for a certain period of time at the repetition point of the oscillating motion, as shown in FIGS. 3 (2) and 4 (2), respectively, by a timer built therein. Can be set.
In the example of this drawing, the servo motor 13 is stopped for a certain time at the repetition point, but the servo motor 13 may be stopped for a certain time at any point other than the repetition point during the rocking motion. In this way, the swinging device 2 is further fully automated in lens polishing. Further, the control unit 12 sets forward / reverse rotation cycle and stop range setting units 16 and 17 so as to cause the driving unit 10 to perform the movement as shown in FIGS. 3 (2) and 4 (2). As a result, a control signal for causing the arithmetic unit 18 to calculate based on the input information and to move the drive unit 10 as set is transmitted from the output unit 19 to operate the drive unit 10. In addition, in FIG.
Reference numeral 20 denotes polishing vessels 21 and 22, which are pulleys and belts for rotating the spindle 6.

Next, a method of using the swing device 2 having the above configuration will be described.

First, the lens 5 which is a material to be polished is held by the holder 4 and the power is turned on. Next, the forward / reverse rotation cycle setting section
While observing the 16 display sections 16a, for example, as shown in FIG. 5 (2), the swing width l (mm) and the swing movement for one cycle for 4 seconds are set. At that point, the polishing plate 3 is rotated by rotating the spindle 6 to gradually pressurize the holder 4, and the polishing of the lens 5 is started to start the driving unit.
Rotate the 10 servo motors 13 forward and backward as set. Further, the swing base 7 is swung via the pulley 15, the belt 11, and the driven portion 9, and the polishing plate 3 is rotated and swung to start full-scale polishing. In the polishing process, a phenomenon occurs in which the peripheral portion of the polishing plate 3 is worn first, so that the axial center portion becomes relatively high and the radius of curvature becomes small. In this case, while watching the display unit 17a of the stop range setting unit 17 of the control unit 12, for example, as shown in FIG. Set so as to make the cycle swing. With such a setting, the polishing of the axial center portion of the polishing plate 3 is accelerated and abrasion is performed by α, so that the radius of curvature of the polishing plate 3 is increased, and accordingly, the radius of curvature of the lens 5 can be increased.

Conversely, if the axial center portion of the polishing plate 3 is worn first, the peripheral portion becomes relatively high and the radius of curvature becomes large. In this case, while watching the display unit 17a of the stop range setting unit 17 of the control unit 12, for example, as shown in FIG. It is set so that the rocking motion of. With this setting, the peripheral edge of the polishing plate 3 is worn faster, and is worn by β, so that the radius of curvature of the polishing plate 3 is reduced, and accordingly, the radius of curvature of the lens 5 can be reduced.

By performing such an operation, the spherical accuracy of the lens 5 is maintained and corrected, predetermined polishing is completed, and the lens 5 is removed from the holder 4 to produce a product.

Further, in the process of polishing the lens 5 with the polishing plate 3, the polishing plate 3 itself is worn and returned to the original position in order to correct the spherical accuracy of the lens 5 due to the wear of the polishing plate 3. There is no phenomenon such as a so-called habit or the like that occurs when the position of the polishing plate 3 hit by the lens 5 is moved.

〔The invention's effect〕

According to the polishing method using the oscillating device configured as described above, the oscillating width of the polishing plate is set, and the polishing plate is rotated and oscillated to polish the material to be polished. Depending on the condition of the polishing dish, the swing motion of the polishing dish is stopped for a set time at the set position of the swing locus, and the polishing dish at that position can be worn to maintain and correct the spherical accuracy of the polishing dish, and also to perform non-polishing. The spherical accuracy of the material can be maintained and corrected.
Therefore, it is possible to easily maintain and correct the curved surface accuracy of the material to be polished, such as a lens, without requiring complicated operation and skill, and in addition, since the position of the polishing plate hit by the material to be polished is not moved, A phenomenon in which a material to be polished such as a so-called habit or the like does not have a correct spherical surface does not occur.

Further, according to the swinging device of the polishing dish in the polishing apparatus of the present invention, the control unit specifies the forward / reverse rotation cycle to operate the drive unit, and transmits this operation via the driven unit and the swing base. Shake the polishing plate to polish the material to be polished,
The control unit specifies the stop time during the forward / reverse rotation cycle according to the wear state of the polishing plate, and operates the drive unit to maintain and correct the spherical accuracy of the polishing plate, and the spherical accuracy of the material to be polished. Can be maintained and corrected.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention.
FIG. 2 is a partially cut-away side view showing a mechanism of a swinging device of a polishing dish in the polishing device of the present invention, FIG. 2 is a configuration diagram of a control unit of the swinging device, and FIGS. FIG. 5 (1) is an explanatory view showing an operation state of the apparatus, FIG. 5 (1) is a side view similar to FIG. 1 showing a conventional example, and FIG. 5 (2) is a cycle diagram of a swinging motion of the conventional example. . 1, 1a: polishing device, 2: oscillating device 3, polisher, 5: lens (material to be polished) 7, ... swing base, 8, oscillating center axis 9, ... follower, 10 ... … Drive unit 12… Control unit, 13… Servo motor

Claims (3)

(57) [Claims] An oscillating device comprising a driven portion, a drive portion, and a control portion of a polishing apparatus for polishing a material to be polished by rotating and oscillating the material to be polished on the polishing plate in a pressurized state. A pulley is used for the driven portion, and the drive portion has a servomotor that is fixed to the swinging center axis and is capable of stopping for a set time at any point during the forward / reverse rotation and the forward / reverse rotation. A configuration in which a pulley having a smaller diameter than the pulley of the driven portion is fixed to the rotating shaft of the motor considerably, and the control portion further includes a control rotation cycle setting portion of the drive portion and a swing trajectory depending on the condition of the polishing plate worn with polishing. A polishing range setting unit for stopping the swinging motion of the polishing plate at a predetermined position for a set time is connected to the calculation unit, and an output unit is connected to the calculation unit. Rocking device. 2. The apparatus according to claim 1, wherein a display section for displaying the forward / reverse rotation cycle and the stop range setting section of said control section is provided. 3. A forward / reverse rotation cycle setting section of the control section,
The swinging device for the polishing dish in the polishing apparatus according to claim 2, wherein the forward / reverse rotation amount and forward / reverse rotation speed of the servomotor can be freely set.