JP2001121392A - Glass article finishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass article finish-machining device capable of efficiently finishing the surface of a glass article in a short time. SOLUTION: A glass panel P is disposed on a moving table 13, and an elevating body 15 is held into a specified level position by a pressure cylinder 18. In this state, the panel P is moved together with the moving table 13 to pass the lower side of a rotating grinding wheel 23. In this passing, a cam face 50a on the upper face of a guide cam 50 is brought into contact with a cam follower 51 of the elevating body 15 against the elastic energizing force of the pressure cylinder 18. With this contact, the grinding wheel 23 is relatively moved on the surface of the panel P following the shape of the cam face 50a of the guide cam 50 to grind the surface of the panel P.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing and finishing a glass article, for example, a glass article used for processing and finishing a panel constituting a front portion of a CRT of a television.

[0002]

2. Description of the Related Art In a panel constituting a front part of a cathode ray tube of a television, for example, as a glass article, the surface of the panel is polished and smooth finished after press molding. Conventionally, as a method,
In general, polishing is performed while sliding the polishing tool while pouring a polishing liquid onto the surface of the panel to modify the shape of the surface of the panel.

FIGS. 9 and 10 show the basic concept, wherein P is a panel, and this panel P is attached to the moving table 1.
After being fixed on the panel P, the polishing tool 3 is brought into contact with the surface of the panel P at a constant pressure,
Then, the polishing liquid flows through the hose 4 between the polishing tool 3 and the surface of the panel P to polish the surface of the panel P. At this time, the polishing tool 3 is sequentially moved in a direction perpendicular to the moving direction of the moving table 1 to polish the entire surface of the panel P. When moving the polishing tool 3, the polishing tool 3 is inclined so as to follow the curvature of the surface of the panel P.

The polishing tools 3 include rough, medium, and finishing tools. Each polishing tool 3 is prepared and sequentially replaced, or as a dedicated machine, a polishing liquid suitable for each purpose is applied by the polishing tool 3 to the panel P. It is performed by pouring it onto the place where it slides on.

[0005]

However, in such a conventional processing and finishing apparatus, since the surface of the glass article must be polished while the polishing liquid is being supplied, the shape correction for removing the distortion of the surface of the glass article is performed. It takes a long time for polishing and polishing, and there is a problem that the working efficiency is reduced.

The present invention has been made in view of such a point, and it is an object of the present invention to provide a glass article processing and finishing apparatus which can efficiently finish the surface of a glass article in a short time. It is in.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a glass article processing and finishing apparatus for finishing a surface of a glass article with a grindstone, comprising a rotating grindstone and moving up and down. A lifting / lowering body that is supported so as to be movable, a moving table that horizontally moves below the grindstone in the lifting / lowering body, a biasing unit that biases the lifting / lowering body in a vertical direction, and provided on the moving table. And a cam follower provided on the elevating body corresponding to the guide cam. A glass article is arranged on the moving table, and the elevating body is moved to a predetermined level by the urging means. When the glass article is moved with the moving table and passes under the rotating grindstone in this state, the cam surface on the upper surface of the guide cam is raised and lowered. And the whetstone is moved relatively on the surface of the glass article in accordance with the shape of the cam surface of the guide cam, and the surface of the whetstone is moved in contact with the cam follower against the elastic urging force of the urging means. Is finished by grinding.

According to the second aspect of the present invention, a vertical position adjusting mechanism for adjusting the vertical position of the glass article when placing the glass article and a horizontal position for adjusting the horizontal position of the glass article when the glass article is placed. An adjustment mechanism is provided.

According to the third aspect of the present invention, when the rotating grindstone moves on the surface of the glass article and grinds the surface, the coolant is injected into the contact portion between the grindstone and the glass article. It is characterized in that an injection means is provided.

According to a fourth aspect of the present invention, the cooling liquid injected by the cooling liquid injection means is water.

According to a fifth aspect of the present invention, the grinding wheel is driven and rotated by a motor provided in the elevating body.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a front view of the finishing machine, and FIG. 2 shows a side view thereof.
This finishing device includes a base 10, on which a guide rail 11 is provided as shown in FIG. 3, and which is driven by a motor 12 on the guide rail 11 in a horizontal direction along the guide rail 11. A reciprocating moving table 13 is provided.

1 and 2 on the base 10.
The frame 14 is erected as shown in FIG.
A lifting body 15 is provided at 4. This lifting body 15 is L
It is vertically supported on the frame 14 via the M guide 16 so as to be able to move up and down freely, and the weight is balanced via the counterweight 17 so that it can be moved up and down lightly and accurately. A pneumatic pressurizing cylinder 18 is provided above the frame 14 as urging means for moving the elevating body 15 up and down.

A pair of support arms 1 is provided at the lower part of the elevating body 15.
9 are provided facing each other, bearings 20 are provided on these support arms 19, respectively, and a main shaft 22 is horizontally and rotatably supported between the pair of support arms 19 via these bearings 20, and A cylindrical forming grindstone 23 is attached and fixed to the outer periphery of the intermediate portion, and a pulley 24 is attached to one end of the main shaft 22.

A motor 25 as a drive source is provided inside the elevating body 15, and a pulley 2 is connected to an output shaft of the motor 25.
6, an endless belt 27 is stretched between the pulley 26 of the motor 25 and the pulley 24 of the main shaft 22, and the rotational power of the motor 25 is transmitted to the main shaft 22 via the belt 27, 22 rotates integrally with the grindstone 23 at a predetermined speed.

As shown in FIG. 4, a pair of nozzles 28 are provided on both sides of the grindstone 23. These nozzles 28 are supported by the elevating body 15, and are positioned below the grindstone 23 when the grindstone 23 rotates. The cooling liquid is sprayed toward it.

The moving table 13 has a horizontal base 29, on which a receiving base 30 is provided as shown in FIGS. The cradle 30 can be adjusted vertically by a vertical position adjustment mechanism. That is, the pedestal 30 is provided on the base 29 so as to be able to move up and down via the guide pins 31.
A movable plate 32 is slidably interposed between the base 0 and the base 29. The upper surface of the movable plate 32 is an inclined surface 32a inclined in the longitudinal direction, and the lower surface of the receiving base 30 is an inclined surface 30a corresponding to the inclined surface 32a of the movable plate 32. The inclined surface 3 of the cradle 30 is placed on the inclined surface 32a of the movable plate 32.
0a is slidably overlapped.

A screw shaft 35 is attached to one end surface of the movable plate 32, and the screw shaft 35 is
9, a handle 37 is attached to an end on the penetrating end side thereof. This screw shaft 3
5 is rotatably connected to the movable plate 32, and the intermediate portion is screwed with the upright wall 36. Therefore, by rotating the screw shaft 35 via the handle 37, the screw shaft 35 is integrated with the movable plate 32. Move in the axial direction. Then, the movable plate 32 moves horizontally together with the screw shaft 35, and this movement causes the cradle 30 to move the inclined surface 30a,
Based on the inclination of 32a, it is displaced up and down along the guide pin 31, and the up and down position is adjusted. In addition to the case where the screw shaft 35 is configured to be operated manually, it is also possible to configure so that the cradle 30 is displaced up and down by being rotated by control of a motor.

Further, the base 29 is provided with a horizontal position adjusting mechanism for adjusting and positioning the horizontal position of the panel P as a glass article placed on the receiving base 30. The adjusting mechanism includes a pair of reference rollers 39a and 39b provided along one side in the longitudinal direction of the cradle 30, and the cradle 3 facing the reference rollers 39a and 39b.
0 and a pair of reference rollers 41 provided along one side in a direction perpendicular to the longitudinal direction of the cradle 30 and a pair of pressing rollers 40a and 40b provided along the other side in the longitudinal direction.
a, 41b and pressing rollers 42a, 42b provided along the other side in a direction perpendicular to the longitudinal direction of the cradle 30 so as to face the reference rollers 41a, 41b.

These reference rollers 39a, 39b, 41
a, 41b and holding rollers 40a, 40b, 42a,
Reference numerals 42b denote brackets 44, 4 via support shafts 43, respectively.
5 is rotatably mounted.

The reference rollers 39a, 39b, 41
The brackets 44 supporting the a and 41b are fixed to the base 29, and the brackets 45 supporting the pressing rollers 40a, 40b, 42a and 42b are connected to pneumatic cylinders 46 and 47 as driving sources fixed to the base 29. Installed.

Reference rollers 39a, 39b, 41a, 41
b and the holding rollers 40a, 40b, 42a, 42b are respectively arranged at positions above the level of the upper surface of the receiving base 30. The pressing rollers 40a and 40b arranged along the longitudinal direction of the cradle 30
Is moved horizontally in the direction perpendicular to the longitudinal direction of the pedestal 30 by the operation of. The pressing rollers 42a and 42b arranged along the direction perpendicular to the longitudinal direction of the pedestal 30 The panel P disposed on the pedestal 30 is positioned at a predetermined position by the horizontal movement of the pressing rollers 40a, 40b, 42a, and 42b.

On the base 29, a pair of guide cams 50 which are located on both sides in the longitudinal direction of the receiving base 30 and extend along the longitudinal direction are detachably mounted. A predetermined section of the upper surface of the guide cam 50 is finished as a cam surface 50a having a shape corresponding to the processing setting shape of the upper surface of the panel P.

A cam follower 51 composed of a rotatable roller corresponding to the guide cam 50 is attached to the lower surface of the support arm 19 of the elevating body 15 disposed above the moving table 13.

A dressing device 53 is provided at one end of the moving table 13.
3 includes a base 54 which is connected to the moving table 13 and moves integrally with the moving table 13 as shown in FIGS. 2 and 3, and extends on the base 54 in a direction perpendicular to the moving direction of the moving table 13. Guide rails 55 are provided, and a gantry 56 is movably supported on the base 54 via the guide rails 55. The gantry 56 moves along the guide rail 55 by the drive of the drive mechanism 57.

On the gantry 56, a main shaft 59 which is rotated by driving by a motor 58 is provided, and a dresser 60 is attached to the main shaft 59. The main shaft 59 supporting the dresser 60 is provided so as to be arranged in parallel with the main shaft 22 supporting the grinding stone 23.

Next, a process of processing and finishing the surface of the panel P as a glass article will be described. Panel P
Is formed in a rectangular inverted dish shape having a gentle curved surface that is convex upward on the surface by press molding.

The panel P is first placed on the cradle 30 of the moving table 13 with its surface facing upward. Then, the screw shaft 35 is rotated via the handle 37,
The cradle 30 is displaced up and down to adjust the height position of the surface of the panel P to a predetermined level position. Further, the cylinders 46 and 47 are driven to displace the pressing rollers 40a and 40b in the horizontal front-rear direction and the pressing rollers 42a and 42b in the horizontal left and right direction, respectively.
a, 39b and 41a, 41b to position them at predetermined positions.

Further, the pressurizing cylinder 18 is driven, and under the control of the pressurizing cylinder 18, the elevating body 15 is lowered to hold the grindstone 23 at a predetermined level.

In this state, the grindstone 23 is driven and rotated by the motor 29 and the moving table 13 is moved by the motor 1.
2 and the panel P together with the moving table 13
Is moved to the arrangement side of the grindstone 23.

With this movement, the cam surface 50 a of the guide cam 50 on the moving table 13 comes into contact with the cam follower 51. As shown in FIG. 4, the cam surface 50 a of the guide cam 50 is formed into an upwardly convex curved surface corresponding to the surface of the panel P, so that the cam surface 50 a of the guide cam 50 comes into contact with the cam follower 51. When the moving table 13 moves, the elevating body 15 moves against the cam surface 50a of the guide cam 50 against the elastic urging force of the pressure cylinder 18.
The rotating whetstone 23 is displaced in the vertical direction following the curved surface shape of the cam surface 50a of the guide cam 50.

The vertically displaced grindstone 23 comes into contact with the surface of the panel P, and the surface of the panel P is ground according to the curved shape of the cam surface 50a of the guide cam 50 by this contact.

At the time of grinding, a high-pressure coolant is sprayed from a nozzle 28 toward a contact portion between the grindstone 23 and the panel P, so that high heat due to the friction is suppressed and glass powder accompanying the grinding is blown off. As the cooling liquid, ordinary industrial water is used, but it is also possible to mix an additive for extending the life of the grindstone 23, an additive for rust prevention, and the like into the water.

The amount of grinding for the panel P is determined from a value determined based on the correlation between the type of the grinding wheel 23, the grinding pressure, the cutting depth, the surface grinding roughness, and the like. That is, after the panel P is press-molded, its outer dimensions are measured to confirm a difference from a predetermined outer dimension to be processed, and grinding conditions are determined. Based on this determination, the relative positional relationship between the guide cam 50, the cam follower 51, and the grindstone 23, the magnitude of the elastic urging force of the pressure cylinder 18, the moving speed of the moving table 13, the rotational speed of the grindstone 23, and the like are determined. .

By passing the panel P once under the rotating grindstone 23 under the grinding conditions determined in this way, the surface of the panel P is processed by grinding and finished to predetermined dimensions.

Since the surface of the panel P can be finished to a predetermined size only by passing the panel P once under the grindstone 23, the processing time is greatly shortened and efficient processing is achieved. be able to.

In addition, since the polishing liquid required in the conventional polishing method is not necessary, it is sufficient to simply use a cooling liquid with ordinary industrial water, so that the cost can be reduced.

The motor 25 for driving the grindstone 23 is an elevating body 1
5 so that the entire apparatus can be made compact.

The grindstone 23 is clogged with the elapse of the use time, and the grinding ability is reduced. When the grinding ability of the grindstone 23 decreases during use, the lifting / lowering body 15 is driven by the pressurizing cylinder 18 to move the grindstone 23 to the dressing device 53.
At the same level as the height of the dresser 60,
In this state, the dressing device 53 is driven.

When the dressing device 53 is driven, the dresser 60 is rotated by the motor 58 and the motor 1 is rotated.
2, the moving table 13 moves, and the gantry 56 moves integrally with the moving table 13 to the side where the grindstone 23 is disposed, and the dresser 60 comes into contact with the grindstone 23. In this state, the gantry 56 is moved by the driving mechanism 57. It moves along the guide rail 55 and the surface of the grindstone 23 is dressed by the dresser 60. When truing the grindstone 23, the motor 12 and the drive mechanism 57 are operated to
6 is moved in the X-Y direction perpendicular to the axial direction of the grindstone 23.

As described above, by dressing and truing by directly applying the dresser 60 to the grindstone 23 during use, the clogging and the like of the grindstone 23 can be easily corrected without being detached from the main shaft 22 for reuse. Becomes possible.

Next, a case where the surface of the flat panel P 'is ground by a grindstone 23 to finish the panel P' instead of the panel P having a curved surface will be described.

In this case, first, the guide cam 50 for the panel P mounted on the base 29 is removed.
As shown in FIG. 8, instead of the guide cam 50, a guide cam 50 'adapted to a flat panel P' is mounted on the base 29. The upper surface of the guide cam 50 'is a cam surface 50a' finished in a flat shape corresponding to the surface of the panel P '.

In this state, as in the case described above, the panel P 'is placed and positioned on the cradle 30 of the moving table 13 with its surface facing upward. Then, the pressurizing cylinder 18 is driven, the lifting / lowering body 15 is lowered by the control of the pressurizing cylinder 18, the grindstone 23 is held at a predetermined level, and the grindstone 23 is driven and rotated by the motor 29. Then, the moving table 13 is driven by the motor 12 to move the panel P ′ together with the moving table 13 to the side where the grindstone 23 is disposed.

With this movement, the cam surface 50a 'of the guide cam 50' on the moving table 13 is moved to the cam follower 51.
Contact Since the cam surface 50a 'of the guide cam 50' is machined into a flat shape corresponding to the surface of the panel P ', the cam follower 51 moves relatively while keeping parallel to the cam surface 50a' of the guide cam 50 '. The rotating grindstone 23 relatively moves on the surface of the panel P 'following the flat shape of the cam surface 50a' of the guide cam 50 ', and the surface is ground.

Also in this case, the surface of the panel P can be finished to a predetermined size only by passing the panel P 'once under the grindstone 23. Therefore, the processing time is greatly reduced and the efficiency is improved. In addition, it is possible to achieve a high degree of processing finish, and it is not necessary to use a polishing liquid required in the conventional polishing method, and it is only necessary to use a cooling liquid with ordinary industrial water.

[0047]

As described above, according to the present invention,
Since the surface of the glass article is processed and finished by grinding the glass article under the rotating grindstone by the grindstone, the polishing liquid required in the conventional polishing method is unnecessary and the cost can be reduced, and the processing is also possible. Time can be greatly reduced, work efficiency can be improved, and efficient machining can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing an apparatus for processing and finishing a glass article according to an embodiment of the present invention.

FIG. 2 is a side view of the finishing machine.

FIG. 3 is a plan view of a part of the processing and finishing device.

FIG. 4 is a side view of a main part of the processing and finishing device.

FIG. 5 is a plan view of a moving table of the finishing machine.

FIG. 6 is a configuration diagram of a cross section along the line AA in FIG. 5;

FIG. 7 is a configuration diagram of a cross section taken along line BB in FIG. 5;

FIG. 8 is a side view showing a state when processing the surface of a panel having a flat surface.

FIG. 9 is a cross-sectional view of a conventional processing and finishing apparatus as viewed from the side.

FIG. 10 is a cross-sectional view of the processing and finishing apparatus as viewed from the front.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 ... Motor 13 ... Moving table 15 ... Elevating body 18 ... Pressurizing cylinder 23 ... Grinding stone 25 ... Motor 28 ... Nozzle 30 ... Receiving stand 32 ... Movable plate 39a, 39b, 41a, 41b ... Reference roller 40a, 40b, 42a, 42b ... Pressing rollers 46, 47 ... Cylinders 50, 50 '... Guide cams 50a, 50a' ... Cam surface 51 ... Cam follower

Claims (5)

[Claims] An apparatus for processing and finishing a glass article by grinding a surface of the glass article with a grindstone, comprising a rotating grindstone, a vertically movable body supported movably up and down, and a lower part of the grindstone in the vertically movable body. A moving table that moves horizontally on the side, an urging means for urging the elevating body in the vertical direction, a guide cam provided on the moving table, and a corresponding elevating body provided on the elevating body corresponding to the guide cam. And a glass follower, wherein a glass article is arranged on the moving table,
The elevating body is held at a predetermined level by the urging means, and in this state, when the glass article is moved with the moving table and passes under the rotating grindstone, the upper surface of the guide cam is A cam surface is brought into contact with a cam follower of the elevating body against the elastic urging force of the urging means, and in this contact, the grindstone relatively follows the surface of the glass article according to the shape of the cam surface of the guide cam. A finishing apparatus for a glass article, wherein the apparatus is moved to grind the surface. 2. A vertical position adjusting mechanism for adjusting the vertical position of a glass article when placing the glass article and a horizontal position adjusting mechanism for adjusting a horizontal position of the glass article are provided on the moving table. The apparatus for processing and finishing glass articles according to claim 1. 3. A cooling liquid jetting means for jetting a cooling liquid to a contact portion between the whetstone and the glass article when the rotating whetstone moves on the surface of the glass article and grinds the surface. The apparatus for processing and finishing a glass article according to claim 1, wherein: 4. The apparatus according to claim 3, wherein the cooling liquid injected by the cooling liquid injection means is water. 5. The grindstone is rotated by being driven by a motor provided in an elevating body.
A processing and finishing device for a glass article according to any one of the above.