JP2002301646A - Glass article finishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass article finishing device capable of efficiently finishing a surface of a glass article in a short time. SOLUTION: This glass article finishing device is equipped with a grinder unit 26 driven to rotate and a horizontally movable moving table 47 provided below the grinder unit 26. The grinder unit 26 has, on a plurality of concentric circles centering around its center of rotation, grinding tools 38a, 38b, and 38c having surface roughness becoming finer in stages from the outside toward the inside. The glass article P is disposed on the moving table 47 while the unit 26 is inclined at a minute angle θ relative to the horizon. In this state, the unit 26 is driven to rotate, and the table 47 is horizontally moved together with the article P and fed to the under side of the unit 26. The surface of the article P is ground by bringing the surface into contact with the tools 38a, 38b, and 38c of the unit 26 whose under surfaces differ in order in surface roughness.

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 having a flat finished surface, for example, a glass article used for finishing a panel constituting a front portion of a CRT of a television.

[0002]

2. Description of the Related Art For example, in a panel constituting a front portion of a cathode ray tube of a television, after a press molding,
The surface of the panel is polished to give a smooth surface.
As a method of polishing, a polishing tool is generally moved while pouring a polishing liquid onto the surface of the panel, and polishing is performed while correcting the shape of the surface of the panel.

FIG. 10 shows the basic concept. After the panel P is placed on the moving table 1 and fixed,
The polishing tool 2 is brought into contact with the surface of the panel P at a constant pressure, the moving table 1 is moved, and a polishing liquid is poured through the hose 3 between the polishing tool 2 and the surface of the panel P to polish the surface of the panel P. .

There are three types of polishing tools 2, for example, rough, medium, and finishing, which have different degrees of roughness in a stepwise manner. The liquid flows out to the place where the polishing tool 2 slides on the panel P and is polished.

[0005]

However, in such a conventional processing and finishing apparatus, it is necessary to supply the polishing liquid while exchanging the polishing tool 2 three times to polish the surface of the glass article. For this reason, it takes a long time to correct and polish the shape of the glass article in order to remove the distortion of the surface of the glass article.

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 processing and finishing apparatus for a glass article which finishes the surface of a glass article by processing the surface with a grindstone. A horizontally movable table provided below the grindstone unit, wherein the rotatably driven grindstone unit has a plurality of grindstones on a plurality of concentric circles centered on the rotation center thereof, The whetstone placed on the circumference of
In order that the coarseness of the grindstone arranged on the innermost circumference is the finest, the coarseness of the grindstone is stepwise different from the outer grindstone toward the inner grindstone, and the moving table Place the glass article on the top, tilt the grindstone unit at a small angle with respect to the horizontal, rotate and drive the grindstone unit in this state, move the moving table horizontally with the glass article, and lower the grindstone unit. Sent to
The surface of the glass article is brought into contact with the grindstone having the coarser surface on the lower surface of the grindstone unit in the order of the grindstone having the finer coarseness to grind the surface.

According to the second aspect of the present invention, a vertical position adjusting mechanism for adjusting the vertical position of the glass article when the glass article is placed on the moving table, and a horizontal position adjusting mechanism for adjusting the horizontal position of the glass article. A mechanism is provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of the finishing machine, and FIG. 2 is a side view of the same. The finishing machine includes a base 11, on which a portal frame 12 is mounted. An elevating body 13 is provided inside the frame 12.

The elevating body 13 is supported by linear guides 14a and 14b mounted between the elevating body 13 and the frame 12 so as to be able to vertically move up and down.
The counterweight 16 is connected via the reference numeral 5. The wire 15 is hung freely on the pulley 17, and the elevating body 13 and the counterweight 16 are weight-balanced via this wire 15 so that the elevating body 13 can be lightly and accurately moved. I have.

A servomotor 20 is provided on the upper portion of the frame 12 as a drive source of the lifting / lowering body 13, and a screw shaft 21 interlocked with the servomotor 20 is screwed to the lifting / lowering body 13,
The lifting body 13 moves up and down while being guided by the linear guides 14a and 14b by the rotation of the screw shaft 21 driven by the servomotor 20, and the lifting body 13 is positioned at a predetermined level by stopping the servomotor 20. It has become.

A tilt adjusting mechanism 22 is provided on the front surface of the lift 13.
The bearing sleeve 23 is attached along the vertical direction via
A spindle 24 is rotatably inserted into the bearing cylinder 23. The elevating body 13 is fastened and fixed by the inclination adjusting mechanism 22 so that its axis is slightly inclined with respect to the vertical.

The upper and lower ends of the spindle 24 protrude from the bushing 23, and a pulley 25 is attached to the upper end thereof.
A grindstone unit 26 is attached to the lower end.

A motor 29 as a driving source is attached to the back of the elevating body 13, and a pulley 30 is attached to a rotating shaft of the motor 29.
5, an endless belt 31 is stretched. Then, the rotational power of the motor 29 is transmitted to the spindle 24 via the belt 31, and the spindle 24
The spindle rotates at a speed of about 00 RPM, and the grindstone unit 26 is driven to rotate integrally with the spindle 24.

The grindstone unit 26 has a disk-shaped holder 35 as shown in FIGS. 3 to 5, and the holder 35 is concentrically attached to the lower end of the spindle 24.

On the lower surface of the holder 35, an annular first,
Second and third three mounting grooves 37a, 37b, 37c are formed. These annular mounting grooves 37a, 37b, 3
7c are provided so as to be spaced apart from each other on the concentric circle centered on the center of rotation of the grindstone unit 26, and the grindstones having different step sizes in the mounting grooves 37a, 37b and 37c are provided stepwise. 38a, 38b, 38c are mounted respectively.

That is, the first outermost circumference of the concentric circles
In the mounting groove 37a, a rough grinding wheel 3 having a coarse mesh is used.
8a is a semi-finishing whetstone 38b with a slightly coarser grain in the second mounting groove 37b of the middle circumference, and a coarser grain in the third mounting groove 37c of the innermost circumference. A grindstone 38c for fine finishing is mounted on each. In addition, each whetstone 3
Each of 8a, 38b and 38c is divided into a plurality of small pieces, each of which is detachably fixed to the holder 35 by fastening means (not shown).

Each of the grindstones 38a, 38b, 38c is attached to the holder 3
5 project downward from the lower surface of FIG.
As shown in (1), the projecting dimension of the grinding wheel 38a for rough cutting is the smallest, the projecting dimension of the grinding stone 38b for the intermediate finishing is larger than that, and the projecting dimension of the grinding stone 38c for the finishing is the largest.

That is, the lower surfaces of the grindstones 38a, 38b, 38c arranged adjacent to each other in the diameter direction of the holder 35 are:
The level position of the height is gradually and gradually changed stepwise in the direction of the arrangement.
8a and the step size between the semi-finishing whetstone 38b is S,
The step size between the intermediate finishing whetstone 38b and the finishing whetstone 38c is T, and has a relationship of S> T.

Cooling water passages 40 and 41 are formed in the spindle 24 and the holder 35 of the grindstone unit 26, respectively, and a hose 42 is connected to the cooling water passage 40 of the spindle 24 as shown in FIG. During operation, for example, coolant water is sequentially supplied into the coolant passages 40 and 41 as coolant, and the coolant water is ejected from a large number of ejection holes 43 formed on the lower surface of the holder 35.

On the other hand, as shown in FIGS. 1 and 2, a guide rail 45 is provided on the base 11, and is driven by a motor 46 on the guide rail 45 so as to extend in a horizontal direction along the guide rail 45. Is provided.

The moving table 47 has a horizontal base 48.
And a pedestal 49 is provided on the base 48 as shown in FIGS. The pedestal 49 can be adjusted vertically by a vertical position adjustment mechanism. That is, the pedestal 49 is provided on the base 48 so as to be vertically movable via the guide pins 50, and the movable plate 51 is slidably interposed between the pedestal 49 and the base 48. Have been. The upper surface of the movable plate 51 is an inclined surface 51a inclined in the longitudinal direction, and the lower surface of the receiving base 49 is
An inclined surface 49a corresponding to the inclined surface 51a of the movable plate 51 is provided on the inclined surface 51a of the movable plate 51.
Are slidably overlapped with each other.

A screw shaft 52 is attached to one end surface of the movable plate 51, and the screw shaft 52 is
8, a handle 54 is attached to an end on the penetrating end side thereof. This screw shaft 5
2 is rotatably connected to the movable plate 51, and the intermediate portion is screwed with the upright wall 53. Therefore, by rotating the screw shaft 52 via the handle 54, the screw shaft 52 is integrated with the movable plate 51. Move in the axial direction. Then, the movable plate 51 is horizontally moved integrally with the screw shaft 52, and this movement causes the pedestal 49 to be inclined.
Based on the inclination of 51a, it is displaced up and down along the guide pin 50, and the up and down position is adjusted. The screw shaft 52 may be configured to be operated manually, or may be configured to use a drive source such as a motor or an air cylinder that uses electricity or fluid as a drive medium.

Further, the base 48 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 table 49. This adjusting mechanism is provided with a pair of reference rollers 56a, 56b provided along one side in the longitudinal direction of the receiving base 49, and the receiving base 4 facing the reference rollers 56a, 56b.
9, a pair of pressing rollers 57a and 57b provided along the other side in the longitudinal direction, and a pair of reference rollers 58 provided along one side in a direction perpendicular to the longitudinal direction of the receiving table 49.
a, 58b and pressing rollers 59a, 59b provided along the other side in a direction perpendicular to the longitudinal direction of the receiving table 49 so as to face these reference rollers 58a, 58b.

These reference rollers 56a, 56b, 58
a, 58b and holding rollers 57a, 57b, 59a,
Numerals 59b denote brackets 62, 6 via support shafts 61, respectively.
3 is rotatably mounted.

The reference rollers 56a, 56b, 58
The bracket 62 supporting the a and 58b is fixed to the base 48, and the bracket 63 supporting the pressing rollers 57a, 57b, 59a and 59b is fixed to the pneumatic cylinders 64 and 65 as the driving source fixed to the base 48. Installed.

Reference rollers 56a, 56b, 58a, 58
b and the press rollers 57a, 57b, 59a, 59b are respectively arranged at positions above the level of the upper surface of the receiving table 49. The pressing rollers 57a and 57b arranged along the longitudinal direction of the receiving table 49
Is moved horizontally in the direction perpendicular to the longitudinal direction of the pedestal 49 by the operation described above. The pressing rollers 59a and 59b arranged along the direction perpendicular to the longitudinal direction of the pedestal 49 The panel P disposed on the receiving table 49 is positioned at a predetermined position by the horizontal movement of the pressing rollers 57a, 57b, 59a, 59b.

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 polished surface by press molding.

The panel P is placed on a receiving table 49 of a moving table 47 with its surface facing upward. Then, the screw shaft 52 is rotated via the handle 54, and the pedestal 49 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 64 and 65 are driven to displace the pressing rollers 57a and 57b in the horizontal front-rear direction and the pressing rollers 59a and 59b in the horizontal left and right direction, respectively.
The panel P is moved to the reference rollers 56a, 56b and 58a, 5
8b and is positioned at a predetermined position.

On the other hand, the elevating body 13 is
Is driven and lowered to hold the grindstone unit 26 at a predetermined level position. At this time, the bearing cylinder 23 is adjusted and fixed to a posture slightly inclined with respect to the vertical via the inclination adjusting mechanism 22, and as shown in FIG. It is held so as to be inclined at the angle θ.

Further, the grindstone unit 26 is driven to rotate integrally with the spindle 24 by the motor 29, and in this state, the moving table 47 is driven by the motor 46, and the moving table 47 is integrated with the panel P in FIG. The grindstone unit 26 is horizontally moved from left to right, that is, from the outer side of the lower end of the grindstone unit 26 to the inner side.

With this movement, the panel P on the moving table 47 enters below the inclined lower end of the rotating grindstone unit 26. And in response to this approach, panel P
The tip of the moving side first contacts the first grindstone 38a disposed on the lowermost surface of the grindstone unit 26 at the outermost position, and then contacts the second grindstone 38b and the third grindstone 38c in this order. The surface of panel P is ground by these grinding wheels 38a, 38b, 38c.

The grindstones 38a, 38b, 38c are arranged in the order of roughing, semi-finishing, and finishing so that the coarseness of the grindstones 38a, 38b, and 38c gradually decreases from the outer periphery to the inner periphery of the grindstone unit 26. Therefore, the surface of the panel P is ground in the order of roughing, semi-finishing, and finishing.

The grinding amount for the surface of the panel P is
8a, 38b, and 38c are determined from values determined based on the correlation between the types, cutting amounts, surface grinding roughness, and the like. That is, after the press forming of the panel P, the outer dimensions are measured and the difference from a predetermined outer dimension to be processed is confirmed,
The grinding conditions are determined, and based on the determination, the grinding wheel 38a for rough machining, the grinding wheel 38b for semi-finishing, and the grinding wheel 38 for finishing are used.
specifications of c, their dimensions, the moving speed of panel P,
The rotation speed of the grindstone unit 26 is determined.

In this embodiment, as shown in FIG. 5, the grinding amount by the rough grinding wheel 38a is A, the grinding amount by the intermediate finishing grinding wheel 38b is B, and the grinding amount by the finishing grinding wheel 38c. Is C.

Here, the projecting dimensions of the grindstones 38a, 38b and 38c from the lower surface of the holder 35 are different in a stepwise manner, and the step size between the grindstones 38a and 38b is S,
In the dimension T of the step between the grindstone 38b and the grindstone 38c, S>
Since the relationship is T, the surface of the panel P is processed in the relationship A>B> C.

At the time of grinding, coolant water is ejected from each ejection hole 43 on the lower surface of the grindstone unit 26. Then, the grinding surface is cooled by the coolant water, and glass powder and abrasive grains generated by the grinding are removed, thereby preventing the surface of the panel P from being damaged.

In this way, the panel P is mounted on the grindstone unit 2
6 once, the surface is sequentially processed by a roughing grindstone 38a, a semi-finishing grindstone 38b, and a finishing grindstone 38c to finish to a predetermined size and a processed surface. Then, the panel P is moved to the grinding unit 26.
Since it is only necessary to pass once below, the working time can be greatly reduced, the work efficiency can be improved, and efficient working finish can be achieved.

In the above-described embodiment, three types of grindstones having different roughnesses are arranged concentrically from the outside on the lower surface of the holder of the grindstone unit. However, the present invention is not limited to the case of three types. Alternatively, two kinds of grindstones having different roughnesses in order or three or more kinds of grindstones may be arranged in order from the outside to the inside.

[0041]

As described above, according to the present invention,
The glass article was once passed under the rotating grindstone unit, and the surface of the glass article was sequentially ground by a plurality of grindstones provided in the grindstone unit with different degrees of roughness so that the finishing was completed at once. Therefore, the working time can be greatly reduced, the working efficiency can be improved, and efficient working finish 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 processing and finishing device.

FIG. 3 is a plan view of the grinding unit in the processing and finishing apparatus as viewed from below.

FIG. 4 is a sectional view of the grindstone unit.

FIG. 5 is an enlarged cross-sectional view showing a part of the grindstone unit.

FIG. 6 is a plan view of a moving table in the finishing machine.

FIG. 7 is a configuration diagram of a cross section along the line AA in FIG. 6;

FIG. 8 is a configuration diagram of a cross section along line BB in FIG. 6;

FIG. 9 is a front view showing a state at the time of processing operation by the processing finishing device.

FIG. 10 is a cross-sectional view of a conventional finishing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 ... Elevating body 16 ... Counter weight 20 ... Servo motor 24 ... Spindle 26 ... Grinding stone unit 29 ... Motor 35 ... Holder 38a ... Rough grinding stone 38b ... Medium finishing grinding stone 38c ... Finishing grinding stone 45 ... Guide rail 47 ... Moving table 48... Base 49... Receiving table 51...

Claims (2)

[Claims] An apparatus for processing and finishing a glass article by processing the surface of the glass article with a grindstone, comprising: a grindstone unit driven to rotate and a horizontally movable movable table provided below the grindstone unit. Provided, the rotationally driven grindstone unit has a grindstone on a plurality of concentric circles around the center of rotation, respectively.
From the outer whetstone to the innermost, the coarseness of the whetstone placed on the outermost circumference is the coarsest, and the roughness of the whetstone placed on the innermost circumference is the finest. There is a stepwise different relationship between the roughness of the grindstone and the glass article on the moving table,
The grindstone unit is tilted at a small angle with respect to the horizontal, and the grindstone unit is rotated and driven in this state. An apparatus for processing and finishing a glass article, characterized in that a grinding wheel having a coarser surface on a lower surface of a unit is brought into contact with a grinding wheel having a finer coarseness in order and the surface thereof is ground. 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.