JPS61182755A - Optical parts machining device - Google Patents

Abstract

PURPOSE:To enable a stable machining condition to be obtained, by providing an adjusting mechanism for adjusting a swivel speed to a stable speed with no influence by weight of a bottom shaft part. CONSTITUTION:A bottom shaft part 1 is shuttle swivelled with the spherical center O serving as the center through the longitudinal action of a piston rod 11. Here a device is constituted such that a balance weight 27 balanced with weight of the bottom shaft part 1 is suspended for the spherical center O of a wheel 2 being a swivel supporting point. Consequently, a swivel speed can be adjusted to a stable speed by enabling an influence by weight of the bottom shaft part 1 to be eliminated. As a result, the device, generating no speed difference between a swivel forward stroke and a return stroke further enabling the swivel speed to be smoothly controlled, can machine an optical part 14 in a stable machining condition.

Description

[Detailed Description of the Invention] Madness■ The present invention relates to an optical component processing device, and more specifically,
A lower shaft equipped with a grindstone at the upper end is configured to be swingable via a cylinder device, and an optical component held at the lower end of the upper shaft can be processed via the grindstone driven by the rocker 1. The present invention relates to an optical component processing device comprising:

Sub-U Stone This type of lower shaft swing type optical component processing apparatus has conventionally been constructed as shown in FIGS. 4 and 5. Hereinafter, the configuration of the prior art and problems with the configuration will be explained using FIGS. 4 and 5.

In FIGS. 4 and 5, reference numeral 1 indicates a lower shaft equipped with a spherical grindstone 2 at its upper end, and a lower shaft support member 3.
It is rotatably supported via a support shaft 4 and swingably supported relative to a main body side fixing bracket 5 via a support shaft 4 . In addition, the lower shaft 1 has a motor 6, a pulley 7, and a belt 8.
．． It is configured to be rotatably driven via a pulley 9 and swing-driven via a pneumatic cylinder device 10. Reference numeral 11 indicates a piston rod, and reference numeral 12 indicates a cylinder support bracket.

Reference numeral 13 denotes a holding member that fixes and holds the optical component 14, which is a workpiece, by adhesive or other means. is urged downward to press it against the grindstone 2. Reference numeral 17 indicates a pivot, reference numeral 18 indicates a mechanism for adjusting the pressing force, and reference numeral 19.20 indicates the amount of reciprocating work of the piston rod 11 by detecting the position of a piston (not shown). 22.2
The number 3 indicates the speed controller, and the number 24 indicates the speed controller.
An electromagnetic valve which is switched and operated by a signal from a reed switch 19 and 20, and 25 is a pneumatic pressure source.

According to the optical component processing apparatus having the above configuration, the optical component 14 having a spherical surface such as a convex lens, a concave lens, or a spherical mirror can be processed by pressing the optical component 14 against the grinding wheel 2 via the upper shaft 16, and pressing the optical component 14 against the grinding wheel 2. By rotating and oscillating the machine, it is possible to perform processes such as spherical polishing. In addition, the amount of swing (swing range) of the lower shaft portion needs to be changed and adjusted depending on the shape and dimensions of the optical component 14, which is the workpiece, and the purpose.
Installation can be done by adjusting the position by adjusting the slider and changing the settings.

However, the conventional configuration described above has the following problems.

(The lower shaft portion 11 is driven to swing around the spherical center O of the spherical grindstone 2, but when the piston rod 11 of the cylinder device 10 is moved forward (extended), the lower shaft portion The weight (the center of gravity below the ball center O is located below the ball center O) acts as a drag force.Therefore, the swing speed when the piston rod 11 moves forward becomes slower than the set speed.

Furthermore, when the piston rod 11 is moved backward (retracted), the weight of the lower shaft acts as an additional rocking force, so that the rocking speed when the piston rod 11 moves backward is faster than the set speed. Become.

For the above reasons, there is a problem that a speed difference occurs between the forward stroke and the backward stroke of the lower shaft portion, making it impossible to obtain a stable machining speed. For this reason, the optical component 14 cannot be processed with a stable curvature, resulting in a decrease in the quality of the processed product.

(2) Also, since the air for operating the cylinder device 10 is compressible, the residual pressure acts as an additional rocking force during the return stroke of the lower shaft, and together with the +11 additional force mentioned above, the rocking return There was a problem in that the stroke became faster and the speed difference between the forward stroke and the after stroke became larger.

(3) Due to the reasons in (11 and (2)) above, (1) a speed difference occurs between the forward stroke and the backward stroke of the rocking stroke, and (3) it becomes difficult to smoothly control the rocking speed, making it difficult to obtain stable machining conditions. Therefore, there was a problem that the processed product could not be processed with high precision.

The present invention has been made in view of the problems of the prior art described above, and is capable of maintaining a stable rocking speed without being affected by the weight of the lower shaft portion. It is an object of the present invention to provide an optical component processing device that can obtain processing conditions.

The present invention is an optical component processing device of a lower shaft swing drive type, which is equipped with an adjustment mechanism for adjusting the swing speed of the lower shaft to a stable speed. , it is an object of the present invention to achieve the above object of the present invention.

Embodiments of the present invention will be described in detail below with reference to the drawings. In the following description, the same members as those shown in FIGS. 4 and 5 are given the same reference numerals, and the description thereof will be omitted.

(First Embodiment) FIG. 1 is a side view showing the configuration of a first embodiment of an optical component processing apparatus 26 according to the present invention, with a portion shown in cross section for convenience of explanation.

In the figure, 27 indicates a balance weight that is set so that its weight can be balanced with respect to the weight of the lower shaft and the center of gravity 0 of the grinding wheel 2, which is the swinging fulcrum.
It is supported by a wire connection part 30 provided on the upper part of the support member 3 of the lower shaft 1 via the i-wheel 29. The balance weight 27 is attached to the piston rod 11 of the cylinder device 10 so that the swinging speed of the lower shaft portion can be adjusted to a stable speed.
The wire is set so as to apply a swinging operating force when the cylinder operates forward, and to limit the swinging operating force when the piston opening 7 of the cylinder device 10 moves backward. 28. It is suspended via a pulley 29. 3
Reference numeral 1 indicates the support shaft of the pulley 29, and reference numeral 32 indicates the connection hole (or connection shaft) of the wire 28. Further, since the control circuit of the cylinder device tlo is the same as the circuit diagram shown in FIG. 5, illustration and explanation thereof will be omitted.

In the above configuration, its operation will be explained.

When the lower shaft 1 part is caused to swing back and forth about the ball center 0 through the forward and backward movement of the piston rod 11, the weight of the lower shaft 1 part acts as a drag force (resistance force) during the forward swing movement. In addition, when the rocking operation returns, the weight of the lower shaft 1 part acts as an additional rocking force, but in the above configuration, the lower shaft 1 part acts as an additional rocking force. Since the balance weight 27 balanced with [t] is suspended, the action of this balance weight 27 causes the lower shaft 1
The influence of the weight of the parts can be eliminated, and the swinging speed can be adjusted to a stable speed. That is, [t
During the forward swinging operation in which . Pulley 29. Connecting part 30
When the weight of the lower shaft 1 part acts as an additional rocking force during the rocking return operation, the weight of the balance weight 27 acts as a force to suppress the rocking. Since the weight of the lower shaft 1 part and the weight of the balance weight 27 are set to be balanced with respect to the ball center 0, which is the rocking fulcrum, there is no influence of the weight of the lower shaft 1 part during reciprocating rocking. Therefore, the speed during the forward and backward movement of the piston rod 11, that is, during the reciprocating rocking movement of the lower shaft 1 part, can be controlled to be always at a stable speed.As a result,
Since there is no speed difference between the forward stroke and backward stroke of the swing, and smooth control of the rocking speed is possible, the optical component 14 can be processed under stable processing conditions, with high precision and stability. It is possible to obtain an optical component having curvature.

(Second Embodiment) FIG. 2 shows a second embodiment of the present invention. The feature of this embodiment is that the operating pressure (
A balance regulator 33 that makes it possible to eliminate the influence of the weight of the lower shaft portion and eliminate the difference in operating speed during forward movement and backward movement is connected to the air pressure source 25 and the solenoid valve 2.
This point is that it is arranged in a circuit between 4 and 4. That is, although FIG. 2 shows a state in which the solenoid valve 24 is not energized,
As shown in the figure, when the power is not energized, air from the pneumatic pressure source 25 is sent under pressure to the boat on the backward operation side of the piston rod 11, and the pressure is also regulated to the boat on the forward operation side of the piston rod 11 via the balance regulator 33. It is configured so that the air is pumped. To explain more specifically, the air pressure from the air pressure source 25 is p, and the pressure regulated by the balance regulator 33 is l! Then, when the power is not energized, that is, when the piston rod 11 is operated backward (
The operating pressure when the lower shaft part swings back is set to a pressure of "p-μ". Also, when the 9 solenoid valve 24 is energized, the air pressure p from the pneumatic source 25 is sent to the forward operation side boat of the cylinder device 10, and the operation pressure rpJ
The piston rod 11 is operated forward (operation with swinging of the lower shaft portion) at . 34 is a pressure gauge.

In the circuit diagram shown in FIG. 2, there is a gap between the pneumatic source 25 and the solenoid valve 24 in the circuit that pumps air from the pneumatic source 25 to the reverse operation side boat of the cylinder device IO.
A regulator (not shown) may be provided in parallel with the balance regulator 33.

According to the above configuration, when the piston rod 11 is operated forward,
In other words, the operating pressure when operating the swingability of the lower shaft portion is "p",
Further, the operating pressure when the piston rod 11 is operated backward, that is, when the lower shaft portion is swung backward, is "p-μ", and a difference can be created between the operating pressure during the forward operation and the backward operation.

Therefore, the piston rod 1 receives resistance from the weight of the lower shaft portion.
The operating pressure during the forward operation of the piston rod 11 can be made larger than the operating pressure during the backward operation of the piston rod 11, where the weight of the lower shaft portion acts as an additional rocking force, thereby eliminating the influence of the weight of the lower shaft portion. be able to. As a result, the difference in the reciprocating swing speed of the lower shaft portion can be eliminated, the optical component 14 can be processed under stable processing conditions, and an optical component with high precision and stable curvature can be obtained. . Further, it is possible to easily adjust the speed when the piston rod 11 moves forward or backward.

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention. The feature of this embodiment is that a balance cylinder device 35 is installed separately from the cylinder device IO for swinging the lower shaft, eliminating the influence of weight during swinging, and reciprocating the lower shaft. The point is that the settings and configuration are such that speed differences during movement can be eliminated. That is, the piston rod 36 of the balance cylinder device 35 is connected to the lower shaft support member 3 via the joint portion 37, and the port for forward operation of the piston rod 36 in the balance cylinder device 35 is connected to the speed controller 38.
．． It is configured to communicate with the air pressure source 25 via a regulator 39. That is, the air pressure regulated by the regulator 39 is applied to the boat for moving the piston rod 36 forward. Note that 40 indicates the piston rod 36 in the balance cylinder device 35.
The speed controller provided on the boat side piping for reverse operation, indicated by 41, is a pressure needle.

According to the above configuration, the lower shaft portion can be pressurized via the balance cylinder device 35 with the operating pressure regulated by the regulator 39. Therefore, the regulated operating pressure acts as additional rocking pressure during rocking operation in which the weight of the lower shaft acts as a resistance force, and also acts as rocking additional pressure in which the weight of the lower shaft acts as additional rocking force. During the forward and backward movement, it acts as a rocking resistance force, which helps to balance the lower shaft when it swings back and forth, and prevents the rocking speed adjustment of the lower shaft from being influenced by the weight of the lower shaft. It becomes possible to make adjustments without any problems. As a result, stable speed adjustment can be easily performed, and the speed difference in the reciprocating swing speed of the lower shaft can be eliminated, making it possible to process the optical component 14 under stable processing conditions, making it possible to An optical component having accurate and stable curvature can be obtained.

As described above, according to the present invention, it is possible to eliminate the shadow 1 of the weight of the lower shaft when the lower shaft is oscillated, and the lower shaft can be moved at a stable speed. It is possible to swing.

As a result, processing can be performed under stable processing conditions, and an optical component having high precision and stable curvature can be obtained as a processed product.

[Brief explanation of drawings]

FIG. 1 is a side view showing a first embodiment of the device according to the present invention, FIG. 2 is a plan view showing a second embodiment of the device according to the present invention, and FIG. FIG. 4 is an explanatory plan view showing the third embodiment of the invention. FIG. 5 is an explanatory diagram showing the configuration of the prior art. 1... Lower shaft 2... Grinding wheel 10... Cylinder device 11... Piston rond 14... Optical component 16...・Upper axis 19.20...Reed switch 22.13...
... Speed controller 24 ... Solenoid valve 25 ... Air pressure source 27 ... Balance weight 33 ... Balance weight 35 ...
...Balance cylinder device Fig. 1 Fig. 2 Fig. 3

Claims (4)

[Claims] (1) The lower shaft equipped with a grindstone at the upper end is configured to be swingable through a cylinder device, and the optical components held at the lower end of the upper shaft are processed through the swing-driven grindstone. What is claimed is: 1. An optical component processing device that can be freely configured, characterized in that the device is equipped with a swing speed adjustment mechanism for adjusting the swing speed of the lower shaft portion to a stable speed. (2) A patent in which the rocking speed adjustment mechanism is configured with a balance weight that is set to balance the weight of the lower shaft portion that is rocked through the cylinder device and the rocking fulcrum. An optical component processing apparatus according to claim 1. (3) The rocking speed adjustment mechanism is arranged to apply air pressure for adjusting the rocking speed of the lower shaft portion to the forward operation side port of the cylinder device when the cylinder device is operated backward. The optical component processing apparatus according to claim 1, which comprises a regulator. (4) The rocking speed adjustment mechanism includes a rocking speed adjusting cylinder device provided separately from the rocking drive cylinder device, and a forward operation side port of the rocking speed adjusting cylinder device. The optical component processing apparatus according to claim 1, further comprising a regulator arranged to apply air pressure for adjusting the swinging speed of the lower shaft portion.