JPH0631608A - Spherical body polishing device - Google Patents

Abstract

PURPOSE:To obtain a spherical body polishing device with which ball lenses whose diameters do not widely vary can be processed simply. CONSTITUTION:A motor 3 is fixed on a guide 2 vertically provided on a frame 1, and a ball threaded shaft 4 is provided between the motor 3 and the frame 1. A motor 13 that rotates an upper shaft 16 is fixed on the top end of an arm 14 that is supported to rise and fall freely through the ball threaded shaft 4. The upper shaft 16 is supported by the arm 14 to rotate freely and to slide freely. A holder 18 that holds a ball lens 27 to rotate freely is fixed to the upper shaft 16. A pipe 8 is connected to the upper shaft 16. The upper shaft 16 is vertically moved by a micrometer 35 connecting to a motor 31 fixed on the arm 14. An air cylinder 26 is fixed to the lower end of an air cylinder 6 fixed on the arm 14. A U-shaped spacer 17 is fixed to the air cylinder 26. A grinding wheel 21 is stuck fast to a grinding wheel affixing plate 22, and supported by a motor 16 rotatably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus for processing spherical optical elements, steel balls and the like.

[0002]

2. Description of the Related Art Conventionally, a ball processing method has been known as a method for processing spherical optical elements, steel balls, ceramic balls and the like. An example of this ball processing method is the invention described in Japanese Patent Laid-Open No. 3-10764.

In the above invention, as shown in FIG. 4, a polisher 72 is integrally provided on the upper surface of a rotatable rotary shaft 71. A cylindrical holder 73 is arranged above the polisher 72. A storage chamber 75 for storing and processing the member 74 to be polished is provided at the center of the lower portion of the holder 73. A pipe-shaped upper shaft 76 is fitted and mounted on the upper part of the holder 73, and the upper shaft 76 is a drive mechanism (not shown) for vertically moving and rotating the holder 73 and controlling the upper surface of the polisher 72. It is connected. Further, the pipe-shaped upper shaft 76 is connected to a liquid supply device (not shown) that supplies an abrasive into the storage chamber 75.

In the processing using the polishing apparatus having the above-mentioned structure, an abrasive is supplied into the storage chamber 75, and the pressure of this fluid presses the member to be polished 74 against the polisher 72 while rotating the rotary shaft 71 and the upper shaft. Polishing is carried out by the forward and reverse rotation of 72.

[0005]

However, in the prior art, the positioning from the loading position of the ball lens to the holder to the processing start position depends only on the positioning accuracy of the motor that moves the upper shaft up and down. The starting position was different for each machining. Therefore, the machining allowance of the ball lens to be processed varies, and the diameter of the ball lens varies.

Therefore, the present invention was developed in view of the above problems in the prior art, and an object of the present invention is to provide a sphere polishing apparatus capable of performing processing with a stable ball lens diameter.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a rotatable grindstone, a rotatable holder for rotatably holding a member to be machined on the machined surface of the grindstone, and a holder which can be moved toward and away from the grindstone. Holding means for holding the holder, a raising means for detecting the movement of the holder and raising the holder by a predetermined amount, a grinding liquid supply means for supplying a grinding liquid for a workpiece to a fluid supply hole provided in the holder, and a grindstone surface. A spacer for setting an initial position up to the holder and a spacer moving means are provided.

[0008]

According to the present invention, it is possible to prevent variation in the diameter of the ball lens.

[0009]

Embodiment 1 FIGS. 1 and 2 show the present embodiment, FIG. 1 is a partially cutaway side view, and FIG. 2 is an enlarged sectional view of an essential part.
Reference numeral 1 is a frame, and a guide 2 is erected on the frame 1. A motor 3 is fixedly installed on the upper end of the guide 2, and a ball screw shaft 4 into which a ball screw bearing 5 is screwed is installed between the motor 3 and the frame 1.

Reference numeral 14 denotes an arm, which is supported by a guide 2 and a ball screw bearing 5 so as to be vertically movable. Reference numeral 18 denotes a holder having a recess for holding the ball lens 27 rotatably on the lower end surface thereof, and the holder 18 is fixed to the upper shaft 16. Upper shaft 16 is bearing 1
5 is rotatably supported by a bearing 28,
The bearing 28 is supported by the arm 14 so as to be vertically slidable.

A pulley 10 is fixed to an upper portion of an upper shaft 16, and a belt 11 is connected between the pulley 10 and a pulley 12 of a motor 13 fixed to a tip of an arm 14. A pipe 8 is attached to the upper end of the upper shaft 16 via a rotary joint 9.
Are connected, and the pipe 8 is connected to a pneumatic device (not shown).

A motor 31 is fixed to the lower surface of the arm 14. A belt 33 is connected between a pulley 32 of the motor 31 and a pulley 34 of a micrometer 35 fixed to the lower surface of the arm 14. Micrometer 3
The anvil 5 is in contact with the support 36 fixed to the upper shaft 16, and is configured so that the upper shaft 16 can be moved up and down by driving the motor 31.

Reference numeral 29 denotes a sensor fixed to the upper surface of the arm 14 for detecting contact or separation of the detection body 30 fixed to the upper shaft 16. An air cylinder 6 is fixed to the arm 14, and an air cylinder 26 is fixed to the lower end of the air cylinder 6. Pipes 7 and 19 are connected to the air cylinders 6 and 26, respectively, and the pipes 7 and 19 are connected to pneumatic equipment (not shown).

A U-shaped spacer 17 is fixed to the tip of the advancing / retreating shaft of the air cylinder 26. The grindstone 21 is fixed to a grindstone pasting plate 22 supported by a motor 16 fixed to the frame 1, and is configured to be rotatable. 37 is a tarai that collects the working fluid (grinding fluid),
Reference numeral 25 is a working fluid storage tank, 24 is a pump, and 23 is a working fluid supply nozzle.

FIG. 2 is a view for explaining the relationship between the holder 18 and the spacer 17. In FIG. 2, A is a holder 1.
8 is the distance between the tip lower surface 18a and the processed surface 21a of the grindstone 21, B is the distance between the holder holding portion upper end 18c and the surface of the ball lens 27 before the start of processing, and C is the holding portion upper end 18c and the tip lower surface 18a of the holder 18. And D represents the spherical diameter of the ball lens 27.

As shown in FIG. 2, the distance A is the diameter D of the ball lens 27, the distance B differs depending on the diameter of the ball lens 27, and the distance between the upper end 18c of the holding portion and the lower surface 18a of the tip, which is determined by the shape of the holder 18. Determined by C and. In this embodiment, since the spacer 17 has a function of determining the distance A, the thickness t of the spacer 17 is t.
Should be set equal to the interval A, but when the spacer 17 just before processing is sandwiched between the holder lower surface 18a and the processing surface 21a of the grindstone 21, it becomes difficult to retract the spacer 17 by the air cylinder 26. . Therefore, the thickness t of the spacer 17 is thinner than the distance A by the clearance t ′. The distance B varies depending on the diameter D of the ball lens 27. In this embodiment, the ball diameter is 0.5.
This interval B was set to 40 μm in order to process the ball lens 27 of mm.

The polishing apparatus having the above structure processes the ball lens 27 by the following procedure. Arm 14
Is moved up and down to position the holder 18 at the loading position, and the ball lens 27 is held in the recess provided at the lower end of the holder 18 by the surface tension of water. At the same time when the arm 14 is lowered, the spacer 17 is attached to the air cylinders 6, 2
It is lowered and advanced by 6 and is positioned on the lower end surface of the holder 18.

After the spacer 17 contacts the machined surface 21a of the grindstone 21, the upper shaft 16 passes through the bearing 28 and the arm 14
Relative to. Then, the detection body 30 separates from the sensor 29, and the sensor 29 senses it and outputs a signal. By that signal, the descent of the arm 14 is stopped via the control unit (not shown), and at the same time, the motor 31 is driven. By driving the motor 31, the anvil of the micrometer 35 is operated to raise the support 36, so that the holder 18 is raised by the clearance t ′ of the spacer. After that, the spacers 17 are retracted by the air cylinders 6 and 26 to enter the processing start state.

The ball lens 27 is processed by rotating the holder 18 by the motor 13 and simultaneously supplying compressed air to the ball lens 27 from a pneumatic device (not shown) through the pipe 8, the rotary joint 9, the upper shaft 16 and the holder 18. To do. At the same time, the grindstone 21 is rotated by driving the motor 16, and the holder 18 is gradually lowered to a predetermined position by the motor 31 while supplying the working liquid by the nozzle 23.

By the processing, the diameter D of the ball lens 27 is reduced and the interval B is increased. If the distance B changes, the processing accuracy of the ball lens 27 may be lowered. Therefore, the arm 14 is lowered by the motor 3 so that the distance B is always constant during processing, and the holder 18 is moved.
To follow this decrease in lens diameter.

After the processing is completed, the rotation of the holder 18, the supply of compressed air, the rotation of the grindstone 21 and the supply of the working liquid are stopped. Then, the arm 14 is raised to return the holder 18 to the loading position, and the ball lens 27 is collected.

According to the spherical body polishing apparatus of this embodiment, it is possible to easily process a ball lens having a small variation in diameter.

[0023]

Second Embodiment FIG. 3 is a partially cutaway side view showing the present embodiment. The present embodiment is different in that the air cylinders 6 and 26 and the pipes 7 and 19 for driving the spacers 17 in the first embodiment are eliminated, and a motor 41 is used instead, and other configurations are composed of the same components. Therefore, the same components are given the same numbers and their explanations are omitted.

Reference numeral 41 is a motor, and this motor 41 is fixed to the arm 14. The spacer 17 is fixed to the lower end of the motor 41.
It is configured to be positioned on the lower end surface of the holder 18 by the rotational drive of the. Hereinafter, the configuration and operation are similar to those of the first embodiment, and the description of the configuration and operation will be omitted.

According to the spherical polishing apparatus of the present embodiment, the same effect as that of the first embodiment can be obtained, and at the same time, the first embodiment can be obtained.
The number of constituent members can be smaller than that of the above constituent members.

[0026]

As described above, according to the sphere polishing apparatus of the present invention, a ball lens having a small diameter variation can be easily processed.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment.

FIG. 2 is an enlarged cross-sectional view of a main part showing the first embodiment.

FIG. 3 is a partially cutaway side view showing a second embodiment.

FIG. 4 is a partial cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 frame 2 guide 3,13,16,31 motor 4 ball screw shaft 6,26 air cylinder 7,8,19 pipe 10,12,32,34 pulley 11,33 belt 14 arm 16 upper shaft 17 spacer 18 holder 21 grindstone

Claims (1)

[Claims] 1. A rotatable grindstone, and a rotatable holder for rotatably holding a member to be machined on a machined surface of the grindstone.
Holding means for holding the holder so as to be able to move toward and away from the grindstone, raising means for detecting movement of the holder and raising the holder by a predetermined amount, and supplying a grinding liquid for a workpiece to a fluid supply hole provided in the holder A spherical polishing apparatus comprising: a grinding liquid supply means, a spacer for setting an initial position from a grindstone surface to a holder, and a spacer moving means.