JP2000084828A - Polishing device for inner periphery of glass disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly precisely process the inner peripheral surface of a glass disk. SOLUTION: This polishing device for the inner periphery of a glass disk 1 has a work setting part 2 for setting the glass disks by stacking them, a shaft-attached polishing brush 3 having many brush hairs around the shaft, a brush rotation driving part 4 to rotate the shaft attached polishing brush 3, a driving part 5 for moving the shaft-attached polishing brush 3 in the stacked direction and a brush tip supporting part 6 for rotatably supporting a shaft tip 3a protruded from one end in the stacked direction when inserting the shaft- attached polishing brush 3 into the center hole of the stacked glass disks from another end in the stacked direction by the driving part 5 for driving the brush in the stacked direction, and the inner peripheral surface of the stacked glass disks is polished by rotating the shaft-attached polishing brush 3, with the shaft- attached polishing brush 3 inserted in the center hole of the stacked glass disks and with the shaft tip 3a supported.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass disk inner peripheral polishing apparatus for polishing an inner peripheral surface of a glass disk having a center hole in a donut shape.

[0002]

2. Description of the Related Art In recent years, a demand for a glass disk as a storage medium is increasing, and a high degree of processing accuracy is required. The inner peripheral surface of a glass disk having a center hole in the shape of a donut disk is processed while a shaft-shaped diamond grindstone or a shaft-shaped polishing brush is inserted into the central hole and applied to the inner peripheral surface. In processing the inner peripheral surface, one end of the shaft of the diamond grindstone or the polishing brush is fixed to the motor side, and the other end is used in a free state without being supported.

[0003]

However, when the shaft is used in a free state without supporting the other end of the shaft as in the above-described conventional inner peripheral surface processing, the other end of the shaft (shaft end) is rotated together with the rotation. Because of the deflection, it has been one of the causes of deteriorating the processing accuracy of the inner peripheral surface.

For example, when laminating glass disks and simultaneously processing the inner peripheral surface of a large number of the glass disks, a run-out of the shaft tip causes a gap between the upper, middle and lower portions of the laminated glass disk. There has been a problem that polishing variations occur and the concentricity of the inner diameter of each glass disk also varies.

[0005] The present invention has been proposed in view of the above,
An object of the present invention is to provide a glass disk inner peripheral polishing device capable of processing the inner peripheral surface of a glass disk with high accuracy.

[0006]

In order to achieve the above object, an invention according to claim 1 is directed to a glass disk inner peripheral polishing apparatus for polishing an inner peripheral surface of a glass disk having a center hole in a donut shape. A work setting unit for laminating and setting the glass discs, a polishing brush with a shaft having a large number of bristles around an axis, and a brush rotation drive unit for rotating the polishing brush with a shaft around the axis,
A brush laminating direction driving unit that moves the polishing brush with the shaft in the laminating direction to freely enter and exit the center hole of the laminated glass disk; and a polishing glass brush from one end in the laminating direction of the polishing brush with the shaft by the brush laminating direction driving unit. When inserted in the center hole of, the brush tip support portion rotatably supports a shaft tip protruding from the other end in the stacking direction, and has the shaft-mounted polishing brush inserted into the center hole of the laminated glass disk, Further, the polishing apparatus is characterized in that the polishing brush with a shaft is rotated while the tip of the shaft is supported to polish the inner peripheral surface of the laminated glass disk.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the brush tip supporting portion supports the tip of the polishing brush with a shaft and the tip of the shaft. It is characterized by having a rotating support that rotates freely with the rotation of.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, the brush laminating direction driving section includes the shaft-attached polishing brush at the center of the laminated glass disk. The brush tip is further reciprocated in the laminating direction while being inserted into the hole, and the brush tip support portion reciprocates integrally with the tip of the shaft in synchronization with the reciprocation of the shaft-mounted polishing brush.

Further, in the invention set forth in claim 4, in addition to the configuration according to any one of claims 1 to 3, the work setting section sets and stacks a glass disk. The laminated glass disk is rotated in a direction opposite to the rotation direction of the shaft-mounted polishing brush.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view of a glass disk inner peripheral polishing apparatus of the present invention, FIG. 2 is a side view, FIG. 3 is a partially enlarged view of FIG. 2, and FIG. 4 shows a work setting section and a brush tip support section in detail. FIG. 5 and FIG. 5 are partial enlarged views of the brush tip support portion. In these figures, the inner peripheral polishing device 1 for a glass disk has an inner peripheral surface 9 of a donut disk-shaped glass disk 9.
a (FIG. 4) is polished, and is supported and supported by a gantry 1A and a work base 1B that form a framework of the apparatus. As shown in FIG. 2, the gantry 1A supports the brush rotation drive unit 4 and the brush stacking direction drive unit 5, and the work base 1B supports the work setting unit 2 and the brush tip support unit 6. Next, the configuration of each of these units will be described in order.

The brush rotation driving section 4 is configured by providing a motor 41 and a brush driving body 43 on a rotation driving section support substrate (not shown), and a driving belt 42 is provided between the motor 41 and the brush driving body 43. The rotation of the motor 41 is transmitted to the brush driving body 43. On the lower side of the brush driving body 43, a shaft-attached polishing brush 3 formed by implanting a large number of brush bristles around an axis is detachably attached.

The brush laminating direction drive unit 5 includes a servo motor 51 and a ball screw 52 as an output shaft of the servo motor 51 vertically below the top of the gantry 1A. A linear moving plate 56 is fixed to the moving body 52b as a nut screwed on the male screw 52a of the ball screw 52 via a horizontal member, and the linear moving plate 56 is also fixed to the linear moving plate 56 via a horizontal member. The brush driver 43 is fixed. The base 1A is provided with two guide rails 55, 55 in parallel with the ball screw 52, and guide pieces 54 projecting from the back surface of the rectilinear moving plate 56 are slidably fitted on the guide rails 55, 55. I agree. In addition, a moving body (nut) 52
b, the above-mentioned rotation drive unit support substrate is integrally attached.

In the above-described brush laminating direction driving unit 5,
When the servomotor 51 is driven and the male screw 52a rotates, the moving body 52b moves up and down along the male screw 52a according to the rotation, and according to the up and down movement, the rectilinear moving plate 56 moves to the guide rails 55 and 55. Move up and down along
The brush driver 43 moves up and down accordingly. Further, the rotation drive unit support substrate also moves up and down integrally with the motor 41 and the brush driving body 43 provided on the substrate. That is, the brush driving body 43 is a mechanism that can simultaneously perform the rotation drive by the motor 41 and the vertical movement by the servomotor 51, and accordingly, the polishing brush 3 with the shaft also performs the rotation and the vertical movement at the same time.

On the back surface of the linearly moving plate 56, in addition to the above-mentioned guide pieces 54, a support shaft 57 is protruded, and the support shaft 57 has a predetermined shape as shown in FIGS. An operation plate 58 made of an elongated plate is suspended. At a predetermined position below the operation plate 58, a piston hole 58a through which a piston 75b described later penetrates is formed.

The work setting section 2 is shown in FIGS.
As shown in FIG. 2, a base 21 mounted on the base surface 10 of the work base 1B and mounted on the base 10 and a rotary drive rotatably mounted on the base 21 via a bearing 21a. It comprises a body 22 and a cylindrical work storage box 23 set on the rotary driving body 22.

A ring gear 22 is provided below the rotary driving body 22.
1 and the ring gear 221 is, as shown in FIGS. 1 and 4, a motor 222 mounted on the work base 1B.
Gear 223 provided on the output shaft of the motor 222
Is transmitted to the rotary driver 22.

A glass disk 9 having a center hole in the form of a donut disk is stacked and stored inside the work storage box 23, and the outer peripheral edge of the upper end surface of the laminated glass disk 90 is bolted 232 through a pressing member 231. Pressing by tightening with. As a result, a large number of glass disks 9 can be set in the work storage box 23. The set work storage box 23 is the rotary drive 22
And fixed with bolts 233.

At the center of the work setting section 2,
A through hole is provided. That is, the work storage box 2
In the center of the bottom of the base 3, a brush hole 235 for accommodating the shaft-attached polishing brush 3 inserted through the center hole of the laminated glass disk 90 so as to be able to freely enter and exit is formed.
A hole 25 for the tip support portion for accommodating the brush tip support portion 6 is formed in the rotation drive body 1 and the rotary drive body 22. Then, the rotation driving body 22 inside the tip support portion hole 25 is formed.
A drain cover 65a of a cylindrical body is integrally fixed to the lower end face of the lower end face downward.

The brush tip support section 6 is configured based on a support plate 60 formed by bending a metal plate. As shown in FIG. 1, the support plate 60 has a bulging portion 60a in the front width direction, and a guide piece 61 protruding from the back side of the bulging portion is fixed to the work base 1B in the vertical direction. It is slidably fitted on the guide rail 62. Further, a guide piece and a guide rail (not shown) are provided at a position corresponding to the back side of the support plate 60 and below the polishing brush 3 with a shaft, and the support plate is provided by two guide rails 62 and the like. Numeral 60 slides up and down while maintaining the vertical posture.

The lower end of the support plate 60 contacts a stopper 63 fixed to the work base 1B.
3 regulates downward movement.

As shown in FIG. 3, an air cylinder 75 is provided in the bulging portion 60a so that the cylinder 75a faces the above-mentioned operating plate 58, and the operating plate 58 moves up and down. When the piston hole 58a of the operation plate 58 is at a position facing the cylinder 75a, the air cylinder 75 is operated, and the piston 75b projecting from the cylinder 75a penetrates the piston hole 58a.

The horizontal substrate portion 60b of the support plate 60
Has a through-hole 601 at a position corresponding to a position below the distal end support hole 25 as shown in FIG.
A central core 64a and an outer ring 64
b, and a cylindrical drain cover 65b is bolted upward to the annular upper surface of the outer ring 64b of the base 64 with the bolt. ing. The upper portion of the drain cover 65b surrounds the drain cover 65a. On the other hand, the through hole 60
A hollow hose joint 66 is attached to the lower surface of the outer periphery of the hose 1.

On the upper surface of the core body 64a of the base 64, FIG.
As shown in FIG. 7, a substantially cylindrical bearing holder 67 is mounted with bolts. The bearing holder 67 has a concave portion 671 at an upper portion thereof, and the concave portion 671 integrally accommodates a bearing housing 68 in which ball bearings 68a and 68b are disposed at upper and lower ends and a hole 681 passes through the center. are doing.

The bearing housing 68 is provided with a rotary support 70 comprising a substantially cylindrical brush shaft support 71 and an intervening member 72. That is, a cylindrical portion 72a protruding from the center of the lower surface of the interposition member 72 is fitted into a hole 681 passing through the center of the bearing housing 68, and the brush shaft support 71 is fixed to the upper surface of the interposition member 72. The cylindrical portion 72a is rotatable by ball bearings 68a and 68b disposed above and below the hole 681, whereby the brush shaft support 71 and the interposed member 72 are integrated with the bearing housing 68 as a rotary support 70. It becomes rotatable.

The brush shaft support 71 is provided with a plurality of drain holes 71 radially with respect to the center brush shaft support hole 711.
2 is drilled.

The main part of the brush tip supporting portion 6 which is assembled with the bearing holder 67, the bearing housing 68 and the rotary supporting member 70 in order from the base portion 64 is accommodated in the upper and lower drain covers 65a and 65b. Covered. In addition, since the support plate 60 naturally descends along the two guide rails 62 and the like, the brush tip support portion 6 stops at the stopper 63 as shown in FIG. It is kept in the initial posture.

Glass disk inner circumference polishing apparatus 1 having the above configuration
In the above, when polishing the inner peripheral surface of the laminated glass disk 90, the following procedure is performed.

First, as shown in FIG. 1, a large number of glass disks 9 are stacked and set in the work storage box 23, and the set work storage box 23 is set in FIG.
As shown in (2), it is placed on the rotary drive 22 and fixed with bolts. Then, the motor 222 is driven to
To rotate the laminated glass disk 90 in the work storage box 23.

Next, by driving the servo motor 51 and the motor 41, the shaft-mounted polishing brush 3 is lowered downward while rotating in the opposite direction to the rotation of the laminated glass disk 90, as shown in FIG. As shown, the polishing brush 3 with a shaft is inserted into the central hole of the laminated glass disk 90. At this time, the operating plate 58 is lowered integrally with the shaft-mounted polishing brush 3 by the same distance as the distance that the shaft-mounted polishing brush 3 has been lowered.
When the piston hole 58a of the operation plate 58 reaches a position (lowest position) opposed to the cylinder 75a of the brush tip support portion 6 maintained in the above-mentioned initial posture, the polishing brush 3 with the shaft and the operation at the lowest position. The lowering of the plate 58 is stopped, and the air cylinder 75 is operated to cause the piston 75b to penetrate the piston hole 58a.

On the other hand, when the operation plate 58 is lowered to the vicinity of the lowest position, the tip 3a of the shaft-equipped polishing brush 3 protrudes from the work storage box 23, and the brush shaft support 7
While rotating into the first brush shaft support hole 711, the brush shaft is supported by the brush shaft support 71. At this time, the rotation support 70 composed of the brush shaft support 71 and the interposed member 72 rotates freely according to the rotation of the shaft tip 3a, while the bearing housing 68 and the bearing holder 67 below the rotation support 70 are fixed. And remain stationary.
That is, the rotation of the polishing brush 3 with shaft is transmitted from the shaft tip 3a to the rotation support 70, and the rotation support 70 rotates together with the shaft tip 3a.

Then, the driving of the servo motor 51 is restarted, and the brush bristles of the shaft-mounted polishing brush 3 are applied to the inner peripheral surface 90a of the laminated glass disk 90 as shown in FIG.
The inner peripheral surface processing of the laminated glass disk 90 is performed while moving vertically (reciprocating) and rotating the polishing brush 3 with a shaft and the laminated glass disk 90 in directions opposite to each other. In this case, the operating plate 58 also moves up and down integrally with the polishing brush 3 with the shaft. Therefore, as shown by the solid line position and the two-dot chain line position in FIG. 3, the brush tip support portion 6 formed on the support plate 60 is also integrally moved through the piston 75 b by the same distance as the moving distance of the shaft-mounted polishing brush 3. Only move up and down. That is, the shaft tip 3a of the polishing brush 3 with a shaft moves up and down integrally with the hole 711 for supporting a brush shaft while being rotatably supported by the hole 711 for supporting a brush shaft, and the polishing brush 3 with a shaft reciprocates. Even if it moves, the state of the rotation support continues.

At the time of processing the inner peripheral surface, the polishing brush 3
A slurry in which an abrasive is mixed is supplied as needed between the and the laminated glass disk 90 using an apparatus not shown here. The slurry flows out of the work storage box 23 into the lower brush hole 235, falls while being prevented from being scattered outside by the drain covers 65a and 65b, and is discharged from a hose (not shown) connected to the hose joint 66. You. Further, the slurry that has entered the brush shaft support hole 711 along the shaft tip 3 a is drained by the drain hole 71.
2 and similarly fall while being prevented from scattering to the outside by the drain covers 65a and 65b.

As described above, in this embodiment, the inner peripheral surface of the laminated glass disk 90 is processed while the shaft tip 3a of the shaft-mounted polishing brush 3 is rotatably supported. And the inner peripheral surface can be machined with high accuracy. In addition, the polishing of the respective portions at the upper, middle and lower portions of the laminated glass disk 90 can be performed uniformly, so that each glass disk 9
The inner diameter of the disks is almost evenly finished, and the variation in concentricity between the disks can be kept very small.

A rotary support 7 for supporting the shaft tip 3a
Since the shaft 0 is configured to rotate together with the shaft tip 3a, the wear of the shaft tip 3a can be suppressed, and the dimensional accuracy of the shaft tip 3a can be kept high over a long period of time. Also, almost no friction occurs between the shaft tip 3a and the rotary support 70, and therefore, power consumption can be reduced.

Furthermore, since the inner peripheral surface is processed by reciprocating the shaft-equipped polishing brush 3 together with the rotation, it can be polished to a predetermined finishing accuracy in a short time, and the processing efficiency can be improved. Since the rotation support of the shaft tip 3a is always performed continuously in accordance with the reciprocation,
While maintaining the improvement in machining accuracy associated with the shaft tip support described above,
The improvement of processing efficiency by reciprocating motion can be exhibited.

Further, since the inner peripheral surface is processed while rotating the laminated glass disk 90 and the polishing brush 3 with the shaft in directions opposite to each other, the processing efficiency can be improved also from this point.

Further, since the polishing is performed with the polishing brush 3 having a number of brush bristles having a number of brush bristles, the brush bristles enter the entire inner peripheral surface of each glass disk 9 and are uniform and even in a laminated state. The inner peripheral surface can be processed with high accuracy.

Furthermore, since the brush hairs come into contact with the inner peripheral surface of the glass disk 9, even if the glass disk is relatively fragile, it is hardly damaged, the defect rate can be greatly reduced, and the yield can be reduced accordingly. Can be improved.

[0040]

Since the present invention has the above-described configuration,
The following effects can be obtained.

According to the first aspect of the present invention, the inner peripheral surface of the laminated glass disk is processed while the shaft end of the shaft-mounted polishing brush is rotatably supported. Therefore, the inner peripheral surface can be processed with high accuracy. In addition, the upper, middle and lower portions of the laminated glass disk can be polished uniformly, so that the inner diameter of each glass disk 9 can be almost evenly finished, and the concentricity between the disks is very small. Can be suppressed.

According to the second aspect of the present invention, since the rotating support for supporting the shaft tip is configured to rotate with the shaft tip, wear of the shaft tip can be suppressed, and the dimensional accuracy of the shaft tip is long. High accuracy can be maintained over the period.
Also, almost no friction occurs between the shaft tip and the rotary support, so that an increase in power consumption can be suppressed.

Further, in the invention according to claim 3, since the inner peripheral surface is processed by reciprocating the polishing brush with the shaft together with the rotation, the polishing can be performed to a predetermined finishing accuracy in a short time, and the processing efficiency is improved. Even in such a case, the rotation of the shaft tip is supported continuously in accordance with the reciprocating motion, so the machining efficiency by reciprocating motion is maintained while maintaining the improvement of machining accuracy accompanying the shaft tip support. Can be improved.

According to the fourth aspect of the present invention, since the inner peripheral surface is processed while rotating the laminated glass disk and the polishing brush with the shaft in directions opposite to each other, the processing efficiency is also improved from this point. Can be done.

[Brief description of the drawings]

FIG. 1 is a front view of a glass disk inner peripheral polishing apparatus according to the present invention.

FIG. 2 is a side view of the glass disk inner peripheral polishing apparatus of the present invention.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a diagram showing a work setting section and a brush tip support section in detail.

FIG. 5 is a partially enlarged view of a brush tip support portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass disk inner periphery grinding | polishing apparatus 1A gantry 1B Work base 10 Base surface 2 Work setting part 21 Base stand 21a Bearing 22 Rotation drive 221 Ring gear 222 Motor 223 Gear 23 Work storage box 231 Pressing member 232 Bolt 233 Bolt 235 Brush Hole 25 Tip support hole 3 Shaft-equipped polishing brush 3a Shaft tip 4 Brush rotation drive 41 Motor 42 Drive belt 43 Brush drive 5 Brush stacking direction drive 51 Servo motor 52 Ball screw 52a Male screw 52b Moving body 54 Guide piece 55 Guide rail 56 Straight moving plate 57 Support shaft 58 Operating plate 58a Piston hole 6 Brush tip support 60 Support plate 60a Expanding portion 60b Horizontal board portion 601 Through hole 61 Guide piece 62 Guide rail 63 Upper 64 Base 64a Core 64b Outer ring 65a Drain cover 65b Drain cover 66 Hose joint 67 Bearing holder 671 Depressed portion 68 Bearing housing 68a, 68b Ball bearing 681 Hole 70 Rotary support 71 Brush shaft support 711 Brush shaft support Hole 712 Drain hole 72 Intermediate member 72a Column 75 Air cylinder 75a Cylinder 75b Piston 9 Glass disk 9a Inner peripheral surface 90 Laminated glass disk 90a Inner peripheral surface

Claims (4)

[Claims] 1. A glass disk inner peripheral polishing apparatus for polishing an inner peripheral surface of a glass disk having a center hole in the shape of a donut disk, a work setting section for laminating and setting the glass disks, and a number of brushes around an axis. A polishing brush with a shaft having hairs, a brush rotation driving unit for rotating the polishing brush with a shaft around its axis, and a polishing brush with a shaft which is moved in the laminating direction so as to be able to enter and exit the center hole of the laminated glass disk. A brush stacking direction drive unit, and a shaft tip protruding from the other end in the stacking direction when the polishing brush with a shaft is inserted into the center hole of the laminated glass disc from one end in the stacking direction by the brush stacking direction drive unit. And a brush tip supporting portion, wherein the polishing brush with a shaft is inserted into the center hole of the laminated glass disk, and the shaft tip is supported. State in and adapted to polish the inner circumferential surface of the laminated glass disk rotates the polishing brush with axial, glass disc inner edge polishing apparatus characterized by. 2. The glass according to claim 1, wherein the brush tip support portion has a rotating support that supports the tip of the shaft of the shaft-equipped polishing brush and freely rotates with the rotation of the tip of the shaft. Disk inner circumference polishing device. 3. The brush laminating direction drive section further reciprocates in the laminating direction with the shaft-mounted polishing brush inserted into the center hole of the laminated glass disk, and the brush tip support section includes the shaft-mounted polishing brush. 3. The glass disk inner peripheral polishing apparatus according to claim 1, wherein the apparatus reciprocates integrally with the tip of the shaft in synchronization with the reciprocation of the glass disk. 4. 4. The work setting unit according to claim 1, wherein the work setting unit sets and stacks the glass disks, and rotates the laminated glass disks in a direction opposite to a rotation direction of the polishing brush with a shaft. 4. The inner peripheral polishing device for a glass disk according to any one of items 1 to 3.