KR102414804B1 - Glass plate chamfering device, glass plate chamfering method, and glass plate production method - Google Patents

Abstract

Provided are a glass plate chamfering device, a glass plate chamfering method, and a glass plate manufacturing method capable of improving the chamfering quality of a glass plate without increasing the number of grindstones. The columnar-shaped grindstone 10 is divided into at least two or more divided grindstone parts in the axial direction, and the grinding capability of one divided grindstone part 36 is higher than the grinding ability of the other divided grindstone part 42 are doing That is, one grindstone 10 is made to have a plurality of performances, and the divided grindstone parts 36 and 42 selected according to the performance are used for chamfering of the glass plate 16 . For example, when performing 1st chamfering with respect to 16 A of end surfaces, the divided grindstone part 36 is pressed to 16 A of end surfaces of the glass plate 16, and it grinds. Next, when performing 2nd chamfering, the divided grindstone part 42 is pressed and ground to 16 A of the end surfaces.

Description

The chamfering apparatus of a glass plate, the chamfering method of a glass plate, and the manufacturing method of a glass plate {GLASS PLATE CHAMFERING DEVICE, GLASS PLATE CHAMFERING METHOD, AND GLASS PLATE PRODUCTION METHOD}

This invention relates to the chamfering apparatus of a glass plate, the chamfering method of a glass plate, and the manufacturing method of a glass plate.

A glass plate for FPD (Flat Panel Display) used in liquid crystal displays, plasma displays, etc. is a forming process in which molten glass is molded into a strip-shaped plate glass (also called a glass ribbon), and the plate glass is cut into a glass plate of a predetermined square shape. It manufactures by passing through a cutting process and the chamfering process which grinds and grind|polishes the end surface of a glass plate.

Patent Document 1 discloses a chamfering device used in the chamfering step.

The chamfering apparatus of patent document 1 conveys the glass plate (workpiece) hold|maintained by the holding means to the position where the primary end surface grinding part was provided with a conveyance mechanism, and grind-processes with respect to the both end surface parts. Next, a glass plate is conveyed to the position where the secondary end surface grinding part was provided, and a grinding process is performed with respect to the both end surface parts. Moreover, in patent document 1, in order to mirror-finish with respect to the cross section of a glass plate, it is also indicated that forming an end surface grinding|polishing part on the downstream side of the conveyance direction of a glass plate.

On the other hand, the chamfering apparatus of patent document 2 is equipped with the metal bond grindstone which provided the V-shaped groove|channel for grinding on the outer peripheral surface, and the elastic grindstone whose outer peripheral surface which is a grinding|polishing surface is flat. According to the chamfering device of Patent Document 2, the cross section of the glass plate is ground by the V-shaped groove of the metal bond grindstone to form a chamfered surface on the cross section, and then the chamfered surface is polished by the flat outer peripheral surface of the elastic grindstone. .

Japanese Laid-Open Patent Publication No. 2013-198974 Japanese Laid-Open Patent Publication No. 2001-9689

By the way, in recent years, with the high definition of a liquid crystal display, the quality request with respect to the fine dust (it is also called a particle) adhering to the surface of a glass plate is increasing. That is, it is because fine dust becomes a foreign material at the time of forming elements, such as an electrode, on the surface of a glass plate.

From this, it became clear that the fine cullet which oscillates from the chamfering surface (cross section) of a glass plate also affects the quality of a glass plate, Therefore, further improvement has been calculated|required also in the chamfering processing technique of a glass plate.

The conventional chamfering apparatus disclosed in patent documents 1 and 2 arrange|positions two grindstones with respect to the one end surface of a glass plate, grinds the cross section into a desired chamfering shape with the grindstone of a front stage, and grinds the cross section with the grindstone of a rear stage.

However, it was difficult to reliably polish and remove relatively large chippings and cracks (cracks) generated in the cross section by the grindstone of the front stage only with the grindstone of the rear stage. That is, it was difficult to process the chamfered surface into a mirror surface in which the cullet does not dust only with the grinding wheel at the rear end.

Thereby, in the conventional chamfering apparatus, there existed a problem that it was difficult to chamfer with the specification accompanying the recent high-definition of a liquid crystal display.

In addition, it is also conceivable to arrange four grindstones with different grinding capabilities, that is, four grindstones with different performance, so that rough grinding, medium grinding, finishing, and mirror processing can be sequentially performed on the cross section of the glass plate. can However, in this chamfering apparatus, since the rotation apparatus increases by the increment of a grindstone, the apparatus structure becomes complicated, and it is unpreferable.

The present invention was made in view of such circumstances, and without increasing the number of grindstones, the chamfering apparatus of a glass plate which can improve the chamfering quality of a glass plate, the chamfering method of a glass plate, and providing the manufacturing method of a glass plate do it with

In order for the chamfering apparatus of the glass plate of this invention to achieve the said objective,

Ji-seok and

a rotation means for rotating the grindstone about its central axis; and a first moving means for relatively moving the grindstone and the glass plate in a first direction orthogonal to the cross section of the glass plate;

a second moving means for relatively reciprocating the grindstone and the glass plate along a second direction in which the cross-section of the glass plate extends, and grinding the same cross-section of the glass plate a plurality of times;

a third moving means for relatively moving the grindstone and the glass plate along a third direction orthogonal to the main surface of the glass plate and the second direction;

Control means for controlling the first moving means, the second moving means, and the third moving means are provided.

In order for the chamfering method of the glass plate of this invention to achieve the said objective,

The grindstone is constituted by an upper and lower divided grindstone part, and after pressing one divided grindstone part among the upper and lower divided grindstone parts to one end surface of the glass plate, the grindstone and the glass plate are relative to each other in the extension direction of the one end surface. a first grinding step of grinding the one end face by moving the one divided grindstone part about its central axis while moving it to

After pressing the other divided grindstone part among the upper and lower divided grindstone parts of the grindstone to the one end surface of the glass plate, relatively moving the grindstone and the glass plate in the other extension direction or one extension direction of the one end surface; It is characterized by comprising a second grinding step of grinding the same one end face by rotating the other divided grindstone part about its central axis together.

The manufacturing method of the glass plate of this invention, in order to achieve the said objective, the melting process of heating glass-making feedstock and obtaining a molten glass, the shaping|molding process of making the said molten glass into a plate shape to obtain a glass ribbon, and cutting the said glass ribbon It has the cutting process of obtaining a glass plate, and the chamfering process of chamfering the said glass plate with the chamfering method of the said glass plate.

One aspect of the chamfering apparatus of the glass plate of this invention, the said grindstone is comprised by at least a 1st grindstone and a 2nd grindstone, The said 1st grindstone and the said 2nd grindstone are columnar, Comprising: At least two in the axial direction. It is divided into the above divided grindstone parts, and it is preferable that the grinding capability of the divided one divided grindstone part is higher than the grinding ability of the other divided grindstone part.

One aspect of the chamfering method of the glass plate of this invention is,

The grindstone is composed of at least a first grindstone and a second grindstone,

The first grindstone and the second grindstone are configured in a columnar shape and divided into at least two or more divided grindstone parts in the axial direction, and the grinding ability of one divided grindstone part is higher than the grinding ability of the other divided grindstone part. is high,

After pressing the one divided grindstone part with high grinding ability of the said 1st grindstone to the one end surface of a glass plate, while relatively moving the said 1st grindstone and the said glass plate in the one extension direction of the said one end surface, 1 A first chamfering process of grinding the one end surface by rotating the grindstone about its central axis;

After pressing the one divided grindstone part with high grinding ability of the said 2nd grindstone to the one end surface of a glass plate, while relatively moving the said 2nd grindstone and the said glass plate in the one extension direction of the said one end surface, 2 A second chamfering process of grinding the one end surface by rotating the grindstone around its central axis;

After pressing the other divided grindstone part having a low grinding ability of the second grindstone on one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the A third chamfering process of grinding the one end surface by rotating the second grindstone about its central axis;

After pressing the other divided grindstone part having a low grinding ability of the first grindstone to one end surface of the glass plate, the first grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the It is preferable to provide a 4th chamfering process which rotates a 1st grindstone about its central axis and grinds the said one end surface.

One aspect of the chamfering apparatus for a glass plate of the present invention is that the grindstone is composed of at least a first grindstone and a second grindstone, and the first grindstone is configured in a columnar shape and divided into at least two or more divided grindstone parts in the axial direction. It is preferable that the grinding ability of the divided one divided grindstone part is higher than the grinding ability of the divided divided grindstone part, and the second grindstone is configured in a columnar shape and has the same grinding ability.

One aspect of the chamfering method of the glass plate of this invention is,

The grindstone is composed of at least a first grindstone and a second grindstone,

The first grindstone is configured in a columnar shape and is divided into at least two or more divided grindstone parts in the axial direction, and the grinding capacity of one divided divided grindstone part is higher than the grinding ability of the divided other divided grindstone part,

The second grindstone is configured in a columnar shape and is composed of the grindstone having the same grinding ability,

After pressing the one divided grindstone part with high grinding ability of the said 1st grindstone to the one end surface of a glass plate, while relatively moving the said 1st grindstone and the said glass plate in the one extension direction of the said one end surface, 1 A first chamfering process of grinding the one end surface by rotating the grindstone about its central axis;

After pressing the said 2nd grindstone to the one end surface of a glass plate, while relatively moving a said 2nd grindstone and the said glass plate in the one extension direction of the said one end surface, the said 2nd grindstone is rotated about the central axis. A second chamfering process of grinding the one end surface by

After pressing the second grindstone to one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the second grindstone is moved around its central axis A third chamfering process of grinding the one end surface by rotating;

After pressing the other divided grindstone part having a low grinding ability of the first grindstone to one end surface of the glass plate, the first grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the It is preferable to provide a 4th chamfering process which rotates a 1st grindstone about its central axis and grinds the said one end surface.

As for the one aspect|mode of the chamfering apparatus of the glass plate of this invention, it is preferable that the said glass plate is square shape, and that the said grindstone is arrange|positioned opposing two end surfaces of the said glass plate.

As for one aspect of the chamfering method of the glass plate of this invention, it is preferable that the said glass plate is square shape, and the said grindstone is arrange|positioned opposing to two end surfaces of the said glass plate.

The chamfering apparatus and the chamfering method of this invention make it relatively reciprocally move (1 pass) with respect to the one end surface of a glass plate, and the 1st grinding process of grinding, and the grindstone with respect to the one end surface of a glass plate In the second grinding process of grinding by relatively double acting (2 passes) in the extension direction of the other direction, the number of grindstones is not increased, and the same end surface is ground several times to perform chamfering. . In addition, even by repeating the reciprocal movement twice (1 pass to 2 passes), the same end face can be chamfered without increasing the number of grindstones.

According to the grindstone in one aspect of the present invention, a columnar grindstone is divided into at least two or more divided grindstone parts in the axial direction, and the grinding capacity of one divided grindstone part is lower than the grinding capacity of the other divided grindstone part. making it high That is, one grindstone is given a plurality of performances, and a grindstone part selected according to the performance is used for chamfering a glass plate. For example, when performing 1st grinding with respect to an end surface, one divided grindstone part with high grinding ability is pressed to the end surface of a glass plate, and it grinds it. Next, when performing a 2nd chamfering process, the other divided grindstone part with a low grinding ability is pressed and grinded to the cross section.

Thus, according to the present invention, one grindstone has two or more types of grinding capabilities. Therefore, as a grindstone, at least two of the first grindstone and the second grindstone are formed, the first grindstone and the second grindstone are respectively divided in the axial direction to form a divided grindstone part, Grinding may be performed, the second divided grindstone may be subjected to heavy grinding, the third divided grindstone may be finished, and the fourth divided grindstone may be mirror-finished. Moreover, you may give 4 types of grinding ability to one grindstone. The first grindstone is divided into four in the axial direction to form four divided grindstone parts, the first divided grindstone part is subjected to rough grinding processing, the second divided grindstone part is subjected to heavy grinding, and the third You may finish processing in the divided grindstone part of , and may mirror-finish it in the 4th divided grindstone part. In this way, the 2nd grindstone is unnecessary. In short, the technical idea of the present invention is to gradually remove chippings and cracks generated on the end face by machining in the previous stage in a plurality of machining steps in the next step, and grind the end face to a mirror surface in the final machining step. It is because of the formation of a plurality of stones with different abilities.

Thereby, according to the grindstone for glass plates of this invention, the chamfering quality of a glass plate can be improved, without increasing the number of objects of a grindstone.

In addition, the "grinding ability" described in the specification and claims is a 1st grinding process, a 2nd grinding process, a 1st chamfering process, a 2nd chamfering process, a 3rd chamfering process, and a 4th chamfering process as mentioned above. It means the grinding/polishing ability of the grindstone used in the like, that is, the performance of the grindstone. A grindstone can be roughly divided into a grindstone mainly used for "grinding" and a grindstone mainly used for "polishing" in a broad sense as shown below.

The hard grindstone which fixed the abrasive grain of diamond or CBN (Cubic Boron Nitride: cubic boron nitride) with the metal bond with the grindstone mainly used for "grinding" can be illustrated. Moreover, an electrodeposition diamond grindstone can also be illustrated. By changing the grain size of the abrasive grains of these grindstones, a plurality of types of grinding processing such as rough grinding processing and medium grinding processing can be performed.

A grindstone that is mainly used for "polishing" is a grinding stone such as diamond, green silicon carbide (GC), alumina (Al ₂ O ₃ ), pumice stone, or garnet with a bond such as butyl rubber, natural rubber, or resin. A fixed grindstone can be exemplified. In addition, by changing the grain size of the abrasive grains and the type of bond, it is possible to perform a plurality of types of polishing such as finishing and mirror finishing.

In addition, the "columnar shape" which is the shape of a grindstone shall include a disk shape and a cylindrical shape. Moreover, the thing in which the ring-shaped groove|channel was formed in the surface of the grindstone, and the thing with a flat surface are also included in "circumferential shape".

In the conventional chamfering apparatus, with respect to the one end surface of the glass plate, in one aspect of the present invention, chamfering processing in 1 Pass (reverse copper) in the second direction, after completion of 1 Pass, the grindstone and the glass plate in the third direction relatively Move it and make 2 passes (double acting) in the second direction. Thereby, the 2nd chamfering process (namely, 2nd chamfering process) can be given to the cross section of a glass plate.

According to one aspect of this invention, for example, in the form in which two grindstones are arrange|positioned with respect to one end surface, one of the 1st grindstones contacting one end is set as the grindstone for rough grinding, and the other grindstone is mirror-polished. It is used as a grinding stone for processing. And let one grindstone of the 2nd grindstone which touches next to one end surface be a grindstone for heavy grinding, let the other grindstone be a grindstone for finish processing.

In this case, 1 pass processing is performed with one grindstone of the 1st grindstone, and one grindstone of the 2nd grindstone, and thereafter, 2 pass processing is performed with the other grindstone of the 2nd grindstone and the other grindstone of the 1st grindstone.

Accordingly, in the conventional chamfering apparatus, the machining process comprised of rough grinding and finishing is performed without increasing the number of grindstones in the present invention. It can be composed of 4 processes. For example, as mentioned above, the said 4 process can be implemented with two grindstones. Therefore, in this invention, chamfering quality can be improved significantly, without increasing the number of grindstones.

Moreover, in the form in which two grindstones are arrange|positioned with respect to one end surface WHEREIN: Let one grindstone of the 1st grindstone which touches one end first be a grindstone for rough grinding, and let the other grindstone be a mirror-finishing grindstone. And let the grindstone of the 2nd grindstone which contact|abuts next to one end surface be a grindstone for heavy grinding processing.

In this case, 1 pass processing is carried out with one grindstone of a 1st grindstone, and a 2nd grindstone, and then, 2 pass processing is performed with a 2nd grindstone and the other grindstone of a 1st grindstone.

In addition, in the form in which two grindstones are arrange|positioned with respect to one end surface, let the 1st grindstone which contact|abuts first to one end surface be a grindstone for rough grinding processing. And let the 2nd grindstone which contact|abuts next to one end surface be a grindstone for heavy grinding processing.

In this case, 1 pass processing is performed with the 1st grindstone and the 2nd grindstone, and 2 passes are processed with the 2nd grindstone after that.

As for one aspect of this invention, it is preferable that the said glass plate is square shape, and the said grindstone is arrange|positioned opposing to two end surfaces of the said glass plate which oppose.

According to one aspect of this invention, by turning a glass plate 90 degrees with respect to a grindstone, the chamfering process of 4 cross sections of a rectangular glass plate can be carried out efficiently.

According to the chamfering apparatus of the glass plate which concerns on this invention, the chamfering method of a glass plate, and the manufacturing method of a glass plate, the chamfering quality of a glass plate can be improved, without increasing the number of objects of a grindstone.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows schematic structure of the chamfering apparatus of the glass plate of embodiment to which the grindstone for glass plates of embodiment was applied.
It is a principal part enlarged perspective view which showed the up-and-down arrangement position of the grindstone in the reciprocal movement of the arrow A direction of a glass plate.
It is a principal part enlarged perspective view which showed the up-down arrangement position of the grindstone in the double movement of the arrow B direction of a glass plate.
4(A), FIG. 4(B), FIG. 4(C), FIG. 4(D), and FIG. 4(E) show the state in which the cross section of the glass plate is sequentially chamfered by each grindstone. time) is an explanatory diagram.
5(A), 5(B), 5(C), 5(D), and 5(E) are explanatory views showing temporally the chamfering method by the chamfering device of the embodiment.
6(A), 6(B), 6(C), 6(D), 6(E), and 6(F) show another chamfering method by the chamfering device of the embodiment. It is an explanatory diagram indicated by .
7(A), FIG. 7(B), FIG. 7(C), FIG. 7(D), and FIG. 7(E) are explanatory drawings which show temporally another chamfering method of embodiment.
8(A), FIG. 8(B), FIG. 8(C), FIG. 8(D), and FIG. 8(E) are explanatory drawings which showed temporally another chamfering method of embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, according to an accompanying drawing, preferable embodiment of the chamfering apparatus of the glass plate which concerns on this invention, the chamfering method of a glass plate, and the manufacturing method of a glass plate is demonstrated.

1 shows a first grindstone 10 (hereinafter, the first grindstone 10 is also simply referred to as a grindstone 10) and a second grindstone 12 (hereinafter, a second grindstone 12) of an embodiment of the present invention. ) is also simply called the grindstone 12.) It is a top view which shows schematic structure of the chamfering apparatus 14 of the glass plate of embodiment provided with 1 pair, respectively. This chamfering apparatus 14 is an apparatus used by the said chamfering process in the manufacturing method of the glass plate of embodiment including a melting process, a shaping|molding process, a cutting process, and a chamfering process.

Moreover, as the chamfering apparatus 14, thickness illustrates the apparatus which chamfers 4 end surfaces 16A-16D of the glass plate 16 for liquid crystal displays whose thickness is 0.7 mm or less with the grindstones 10 and 12. The grindstones 10 and 12 will be described later.

In addition, as a glass plate applicable to the chamfering apparatus 14, it is not limited to the glass plate 16 for liquid crystal displays. For example, other glass plates for FPDs, such as the glass plate for plasma displays and the glass plate for LED displays, may be sufficient, and general glass plates, such as the object for solar cells, the object for lighting, the object for building materials, and the object for a mirror, may be sufficient. Moreover, the thickness of a glass plate is not limited to 0.7 mm or less, either, The thickness exceeding 0.7 mm may be sufficient. In addition, it is not limited to a glass plate, Even if it is a metal or resin plate-shaped object, the chamfering process of a cross section is possible with the chamfering apparatus 14. As shown in FIG.

[Overall configuration of the chamfering device 14]

The chamfering device 14 moves the surface plate 18 for adsorbing and holding the rectangular glass plate 16 and the surface plate 18 reciprocally in the direction of the arrow A in the horizontal direction (second direction) (that is, 1 Pass) and A moving device (that is, a second moving means) 20 for double-acting (2 passes) in the direction of the arrow B to grind the same end surfaces 16A and 16B a plurality of times is provided. Moreover, although the chamfering apparatus 14 of embodiment is an apparatus which reciprocates the glass plate 16 with respect to the grindstones 10 and 12 arrange|positioned fixedly, the grindstones 10 and 12 and the glass plate 16, the glass plate ( 16), what is necessary is just an apparatus which reciprocates relatively in the horizontal direction along the extending direction of end surface 16A, 16B.

Moreover, the chamfering apparatus 14 is pressurized to the end surfaces 16A-16D of the glass plate 16, and the columnar grindstones 10 and 12 which process the chamfering surface into end surfaces 16A-16D, and the grindstone 10, 12) is provided with motors (rotation means) 22 and 24 for high-speed rotation. Although two grindstones 10 and 12 are arrange|positioned with respect to end surface 16A, 16B which opposes of the glass plate 16, they may be arrange|positioned three or more.

Further, the chamfering device 14 is a lifting device (ie, third moving means) 26 and 28 for moving the grindstones 10 and 12 up and down together with the motors 22 and 24 in the vertical direction (third direction). , nozzles 30 and 32 for spraying the cooling liquid to the machining portion by the grindstones 10 and 12 , and a control device (control means) 34 , and the like. Moreover, while pressurizing the grindstones 10 and 12 to the end face 16A of the glass plate 16 in a horizontal direction, the conveying apparatus which moves in the direction retracted horizontally with respect to 16 A of end surfaces (namely, a 1st movement) means) 31 , 33 (see FIG. 2 ). Moreover, although the chamfering apparatus 14 of embodiment is an apparatus which raises and lowers the grindstones 10 and 12 with respect to the glass plate 16, the main surface of the glass plate 16 with the grindstones 10 and 12 and the glass plate 16 (16E) (refer to FIG. 2) and the apparatus which moves up and down relatively along the vertical direction orthogonal to a horizontal direction may be sufficient. Moreover, it is not limited to the apparatus which moves the grindstones 10 and 12 forward and backward by the conveying apparatuses 31 and 33 with respect to 16 A of end surfaces, 16 A of end surfaces of the glass plate 16, and the grindstones 10 and 12 It should just be a device that relatively moves forward and backward. The grinding allowance is set according to the feed amount of the feed devices 31 and 33 . Moreover, the feed amount is controlled by the control device 34 based on the grinding capability and performance of the grindstones 10 and 12 .

The control device 34 controls each operation of the moving device 20 , the rotation speed/rotation direction of the motors 22 , 24 , the lifting devices 26 , 28 , and the transfer devices 31 , 33 . The control method of each operation|movement by the control apparatus 34 is mentioned later.

2 : is a principal part enlarged perspective view which showed the up-down arrangement position of the grindstones 10 and 12 in the reciprocal movement of the arrow A direction of the glass plate 16. As shown in FIG.

3 : is a principal part enlarged perspective view which showed the up-down arrangement position of the grindstones 10 and 12 in the double movement of the arrow B direction of the glass plate 16. As shown in FIG.

2 and 3 , the grindstone 10 is rotationally driven by the motor 22 about the central axis 10A. Moreover, when the motor 22 is controlled by the control device 34 (refer FIG. 1), the rotation speed is controlled, and also the rotation direction of the forward and reverse shown by the arrow C of FIG. 2 and the arrow D of FIG. 3 is controlled. In embodiment, when the glass plate 16 moves back and forth in the arrow A direction, the grindstone 10 is rotated in the arrow C direction opposite to the reciprocation direction. Similarly, when the glass plate 16 is double-acted in the arrow B direction, the rotation direction is converted in the arrow D direction opposite to the double-acting direction. In addition, the conversion of the rotation direction of the grindstone 10 is not essential. By not changing the rotation direction of the grindstone, machining time can be shortened.

Similarly, the grindstone 12 is also rotationally driven by the motor 24 about the central axis 12A. Moreover, when the motor 24 is controlled by the control device 34 (refer FIG. 1), the rotation speed is controlled, and the direction of rotation of the forward and reverse shown by the arrow C of FIG. 2 and the arrow D of FIG. 3 is controlled. In embodiment, when the glass plate 16 moves back and forth in the arrow A direction, the grindstone 12 is rotated in the arrow C direction opposite to the reciprocation direction. Similarly, when the glass plate 16 is double-acted in the arrow B direction, the rotation direction is converted in the arrow D direction opposite to the double-acting direction. In addition, the conversion of the rotation direction of the grindstone 12 is not essential either.

<Configuration of the first grindstone (10) and the second grindstone (12)>

The grindstone 10 is divided into two grindstone parts in the axial direction, and the grinding ability of one divided grindstone part (in the illustrated example, the upper divided grindstone part 36) is determined by the grinding ability of the other divided grindstone part (in the illustrated example). In , it is set higher than the grinding ability of the upper divided grindstone part 42).

The grindstone 12 is also similarly divided into two divided grindstone parts in the axial direction, and the grinding capability of one divided grindstone part (upper divided grindstone part 38) is the other divided grindstone part (lower divided grindstone part). (40)) is set higher than the grinding ability of

In addition, the division|segmentation number of the grindstones 10 and 12 is not limited to two, You may divide|segment into three or more.

The divided grindstone parts 36, 38, 40, and 42 of the embodiment are subjected to rough grinding processing (that is, the first chamfering process: 1st) with respect to the end surfaces 16A and 16B by the reciprocating movement of the glass plate 16 mentioned above. grinding process), medium grinding processing (ie, 2nd chamfering process: 1st grinding process), finishing processing (ie, 3rd chamfering process: 2nd grinding process), and mirror finishing (ie, 4th chamfering process: 2nd) Each grinding capacity, that is, performance, is set so that the grinding process) can be sequentially performed.

Specifically, the divided grindstone part 36 performs rough grinding, the divided grindstone part 38 performs medium grinding, the divided grindstone part 40 performs finishing processing, and the divided grindstone part 42 ) is set to perform mirror processing.

4(A) - FIG. 4(E) are explanations temporally showing a state in which the same end face 16A of the glass plate 16 is sequentially chamfered by the divided grindstone parts 36, 38, 40, 42. It is also

4(A) shows the shape of 16 A of cross sections of the glass plate 16 before a chamfering process. That is, 16 A of end surfaces of the glass plate 16 are cut surfaces cut|disconnected in the cutting process of the previous stage of a chamfering process, and are formed in the direction orthogonal to the main surface 16E.

Fig. 4(B) shows the shape of the cross-section 16A subjected to rough grinding by the divided grindstone part 36, and is a U-shaped annular groove in cross section which is the grinding groove of the divided grindstone part 36. By 36A (refer FIG. 2, FIG. 3), it grinds into a substantially U-shape. The roughness of the end face 16A after the rough grinding process is rough, and many chippings and cracks generated by the rough grinding process are generated on the surface thereof.

In addition, the cross-sectional shape of 36 A of annular grooves of the divided grindstone part 36 shown in FIG.2, FIG.3 is not limited to a U shape, A V shape or a concave shape may be sufficient. In addition, the number of the annular grooves 36A may be one, but in order to omit the replacement operation of the divided grindstone part 36, it is preferable to provide a plurality of the divided grindstone parts 36 at predetermined intervals in the axial direction. do. Since 36A of annular grooves are provided in the divided grindstone part 36 in plurality, when the annular groove 36A in use reaches the end of its life, the divided grindstone part 36 is moved by the raising/lowering device 26 into the annular groove 36A. ) in the axial direction, the end face 16A can be rough-ground using the new annular groove 36A without replacing the divided grindstone part 36 .

Fig. 4(C) shows the shape of the cross section 16A subjected to heavy grinding by the divided grindstone part 38 . By pressing the surface of the divided grindstone part 38 to the end surface 16A, the chipping and cracks which have generate|occur|produced in the rough grinding process are substantially removed by grinding.

4(D) shows the shape of the cross section 16A to which the finish processing by the divided grindstone part 40 was given. By pressing the surface of the divided grindstone part 40 to the end surface 16A, the chipping and cracks which have generate|occur|produced in the rough grinding process are further removed by grinding.

4(E), the shape of the cross section 16A to which the finish processing was given by the divided grindstone part 42 is shown. By pressing the surface of the divided grindstone part 42 to the end face 16A, chipping and cracks that have been frequently generated in the rough grinding process are almost completely removed by grinding, and the end face 16A is mirror-finished. In other words, the end face 16A is processed into a mirror surface that is considered not to be oscillated from the end face 16A.

Here, as the divided grindstone parts 36 and 38 which mainly performs "grinding", the hard grindstone which fixed the abrasive grain of diamond or CBN with the metal bond can be illustrated. Moreover, an electrodeposition diamond grindstone can also be illustrated. By setting the grain size of the abrasive grains of the divided grindstone part 36 into 270-600 degrees, for example, the divided grindstone part 36 can perform a rough grinding process. As for the particle size of the abrasive grain of the divided grindstone part 36, it is more preferable to set it as 325-500. By setting the grain size of the abrasive grains of the divided grindstone part 38 into 400-1000 degrees, for example, the divided grindstone part 38 can perform heavy grinding. As for the particle size of the abrasive grain of the divided grindstone part 38, it is more preferable to set it as 420-600 degrees.

And, as the divided grindstone parts 40 and 42 which mainly perform "polishing", a grindstone such as diamond, CBN, green silicon carbide (GC), alumina (Al ₂ O ₃ ), pumice stone, or garnet is used for butyl rubber, natural A grindstone fixed with bonds, such as rubber or resin, can be illustrated. In addition, by making the grain size of the abrasive grains of the divided grindstone part 40 into, for example, 270 to 800 degrees, and the grain size of the abrasive grains of the divided grindstone part 42 to, for example, 600 to 4000 degrees, the divided grindstone part ( 40), and can be mirror-finished by the divided grindstone part 42.

Further, the divided grindstone part 38 fixes a grindstone such as diamond, CBN, green silicon carbide (GC), alumina (Al ₂ O ₃ ), pumice stone, or garnet with a bond such as butyl rubber, natural rubber, or resin. You may use the made grindstone, and in that case, heavy grinding can be performed by making the grain size of the abrasive grain of the divided grindstone part 38 into 400-600 times, for example.

[Action of the chamfering device 14]

First, while setting the grinding allowance by the grindstones 10 and 12 in the control apparatus 34 of FIG. 1, the reciprocating speed and double acting speed of the surface plate 18 are set. At this time, on the basis of the conventional machining time in 1 pass, the moving device 20 is moved so that the machining time in 1 pass and 2 passes (reciprocating) of the embodiment and the conventional 1 pass machining time are approximately equal. It is preferable to set the operation program of the control device 34 to be controlled. If it does in this way, the chamfering quality of the glass plate 16 can be improved in the time equivalent to the processing in the conventional 1 Pass. In this case, it is preferable that the grain size of the abrasive grains of the divided grindstone part 36 be set to 200-450 degrees, and it is preferable that the grain sizes of the abrasive grains of the divided grindstone part 38 shall be 350-500 turns. Moreover, when performing the short machining time, it is preferable to shorten the 2 pass machining time of a double acting rather than the 1 pass machining time of a reciprocating motion. In addition, in the case of performing finishing intensive machining, it is preferable to lengthen the two-pass machining time of the double acting rather than the 1-pass machining time of the reciprocating motion. In addition, you may set the 1 pass machining time of a single acting and the 2 pass machining time of a double acting to equal time.

Next, at the time of reciprocal movement of the glass plate 16 by the surface plate 18, the end surfaces 16A, 16B pass through the divided grindstone parts 36 and 38, and at the time of double movement, the end surfaces 16A, 16B are divided grindstone parts. The operation program of the control device 34 for controlling the lifting devices 26 and 28 is set so as to pass through (40, 42).

Next, at the time of reciprocal movement of the glass plate 16 by the surface plate 18, the grindstones 10 and 12 rotate in the direction of the arrow C, and at the time of double acting, the grindstones 10 and 12 rotate in the direction of the arrow D; An operation program of the control device 34 that controls (22, 24) is set. In addition, as mentioned above, the rotation direction of the grindstones 10 and 12 may not be changed, but may be constant.

By the above, the preset operation|work by the chamfering apparatus 14 is complete|finished.

Next, the glass plate 16 cut|disconnected at the cutting process is made to adsorb|suck and hold by the adsorption|suction surface of the upper surface of the surface plate 18. As shown in FIG. Then, the control apparatus 34 controls each member of the chamfering apparatus 14, and starts the chamfering of end surface 16A, 16B of the glass plate 16.

That is, the control apparatus 34 controls the movement apparatus 20, and makes the glass plate 16 reciprocate in the arrow A direction of FIG. 1 with the surface plate 18. As shown in FIG. And the control device 34 controls the motors 22 and 24, and rotates the grindstones 10 and 12 in the arrow C direction of FIG. And the control apparatus 34 controls the raising/lowering apparatuses 26 and 28, and adjusts the height of the grindstones 10 and 12 to the height where 16 A of end surfaces pass through the divided grindstone parts 36 and 38.

5(A) - FIG. 5(E) are explanatory drawings which show the chamfering method by the chamfering apparatus 14 timely.

The state in which the height of the grindstones 10 and 12 is adjusted to the height where the cross section 16A passes the division|segmentation grindstone parts 36 and 38, and the glass plate 16 is moving back and forth in the arrow A direction in FIG.5(A). It is a schematic side view showing the.

Then, 16 A of end surfaces of the glass plate 16 are rough-grinding with the division grindstone part 36 first by the reciprocation of the glass plate 16 which continues like FIG. 5(B) as a 1st grinding process. After that, it is subjected to heavy grinding by the divided grindstone part 38 . That is, a 2nd chamfering process is implemented.

At the time of rough grinding and heavy grinding, the cooling liquid is sprayed from the nozzles 30 and 32 of FIG. Thereby, since the said processing part is cooled by the said cooling liquid, generation|occurrence|production, such as discoloration and a defect which generate|occur|produces in the end surface 16A of the glass plate 16, can be reduced. Moreover, the chipping which generate|occur|produces in the interface of each of two main surfaces of the glass plate 16, and end surface 16A, 16B can also be reduced. In addition, pure water can be illustrated as a cooling liquid.

As shown in Fig. 5 (C), when the heavy grinding processing of the end face 16A is finished and the glass plate 16 is located at the end point position of the reciprocating movement, the control device 34 of Fig. 1 controls the movement device 20, , the movement of the surface plate 18 is temporarily stopped.

Thereafter, as shown in FIG. And the control apparatus 34 controls the motors 22 and 24, and rotates the grindstones 10 and 12 in the arrow D direction of FIG. Then, the control device 34 of FIG. 1 controls the lifting devices 26 and 28 to set the height of the grindstones 10 and 12 to a height at which the end face 16A passes through the divided grindstone portions 40 and 42 . Adjust. That is, the grindstones 10 and 12 are moved upward in the direction of the arrow E in FIG. 5(C) .

Fig. 5(D) is a schematic side view showing a state at the start of double-acting.

As shown in FIG. 5(E), the double-acting glass plate 16 is finish-processed (that is, the 3rd chamfering process is performed) by the end surface 16A passing through the divided grindstone part 40, and the divided grindstone part 42 ) is mirror-finished by passing through (that is, the fourth chamfering process is performed).

In addition, you may chamfer other opposing end surfaces 16C, 16D of the glass plate 16 by grindstone 10, 12 which has the same performance arrange|positioned at the rear end of grindstone 10, 12 of FIG. That is, in the apparatus of the mechanism of FIG. 1 and the same mechanism arranged at the rear end of FIG. 1, the glass plate 16 is rotated by 90 degrees about the perpendicular to the main surface direction to the axis, and the grindstone 10 and 12 and the grindstone having the same performance. You may chamfer the end surfaces 16C and 16D by this.

Alternatively, after the glass plate 16 is moved in the B direction by the surface plate 18 and returned to the original position, the glass plate 16 is moved by the surface plate 18 with the perpendicular to the main surface direction of the glass plate 16 as an axis. After rotating 90 degrees, while moving the glass plate 16 in the A direction by the surface plate 18, a pair of grindstones each having an interval changed according to the length in the extension direction of the end surfaces 16A, 16B of the glass plate 16 You may chamfer end surfaces 16C and 16D by (10, 12).

[Features of the first grindstone (10) and the second grindstone (12)]

The grindstone 10 (including the grindstone 12) of the embodiment is divided into at least two or more divided grindstone parts in the axial direction, and the grinding ability of the divided grindstone part 36 is reduced by the grinding of the divided grindstone part 42. higher than ability. That is, one grindstone 10 is given a plurality of performances, and a grindstone selected according to the performance is used for chamfering the glass plate 16 .

For example, when performing 1st chamfering with respect to 16 A of end surfaces, the divided grindstone part 36 with high grinding ability is pressed to 16 A of end surfaces of the glass plate 16, and it processes it. Next, when performing 2nd chamfering, the divided grindstone part 42 with a low grinding ability is pressed and processed to the end face 16A.

As described above, the present invention is characterized in that one grindstone 10 has two or more types of performances. Therefore, as a grindstone, at least two of the first grindstone and the second grindstone are formed, the first grindstone and the second grindstone are respectively divided in the axial direction to form a divided grindstone part, Grinding may be performed, the second divided grindstone may be subjected to heavy grinding, the third divided grindstone may be finished, and the fourth divided grindstone may be mirror-finished. Moreover, you may give 4 types of grinding ability to one grindstone. The first grindstone is divided into four in the axial direction to form four divided grindstone parts, the first divided grindstone part is subjected to rough grinding processing, the second divided grindstone part is subjected to heavy grinding, and the third You may finish processing in the divided grindstone part of , and mirror-finishing may be performed in the 4th divided grindstone part. In this way, the 2nd grindstone is unnecessary.

Thereby, according to the grindstone for glass plates of this invention, the chamfering quality of a glass plate can be improved, without increasing the number of objects of a grindstone.

[Features of the chamfering device 14]

The divided grindstone part 36 is rotated by the motor 22 while moving the glass plate 16 back and forth in the direction of the arrow A by the moving device 20, and the divided grindstone part 36 is attached to the end face of the glass plate 16 ( 16A) and pressurize it. Thereby, the 1st chamfering process can be given to the end surface 16A (namely, 1st chamfering process). Next, while moving the grindstone 10 in the arrow E direction (refer to Fig. 5(C)) by the lifting device 26 and double-moving the glass plate 16 in the arrow B direction by the moving device 20, The divided grindstone part 42 is pressed against the end face 16A. Thereby, the 2nd chamfering process can be given to 16 A of end surfaces (namely, 2nd chamfering process).

Here, the conventional chamfering apparatus and the chamfering apparatus 14 of embodiment are compared.

The conventional chamfering apparatus is an apparatus which chamfers 16 A of end surfaces by making 1 Pass (reciprocating movement) of the glass plate 16 in the arrow A direction with respect to a grindstone.

On the other hand, the chamfering apparatus 14 of embodiment changes the height of the grindstone 10 after completion|finish of 1 Pass, makes the glass plate 16 2 Pass (namely, double acting) in the arrow B direction, and makes the glass plate 16 It is an apparatus which gives a 2nd chamfering process to the end face 16A of . Therefore, the chamfering method by the conventional chamfering apparatus and the chamfering method by the chamfering apparatus 14 of embodiment are completely different.

[Other embodiment of chamfering method]

6(A) to 6(F) are explanatory views temporally showing another chamfering method by the chamfering device 14 .

6(A) to 6(F), the grindstone 10 is provided with a divided grindstone part 36 and a divided grindstone part 40, and the grindstone 12 has a divided grindstone part 38 and A divided grindstone part 42 is provided.

The state in which the height of the grindstones 10 and 12 is adjusted to the height where the cross section 16A passes through the divided grindstone parts 36 and 38, and the glass plate 16 is moving back and forth in the arrow A direction in FIG.6(A). It is a schematic side view showing the.

After this, 16 A of end surfaces of the glass plate 16 are 1st chamfering process, First, by the reciprocation of the glass plate 16 which continues like FIG. 6(B), it is rough-grinding with the division grindstone part 36 first. Then, as a 2nd chamfering process, heavy grinding is carried out by the divided grindstone part 38.

As shown in Fig. 6(C), when the heavy grinding processing of the end face 16A is finished and the glass plate 16 is located at the end point position of the reciprocating movement, the control device 34 of Fig. 1 controls the moving device 20, , the movement of the surface plate 18 is temporarily stopped.

Thereafter, the control device 34 controls the transport devices 31 and 33 to retract the grindstones 10 and 12 from the abutting position of the end face 16A, and controls the lifting devices 26 and 28 . Thus, the height of the grindstones 10 and 12 is adjusted to the height at which the end face 16A passes through the divided grindstone portions 40 and 42 . That is, the grindstones 10 and 12 are moved upward in the direction of the arrow E of FIG. 6(D). And the control apparatus 34 controls the movement apparatus 20, makes the glass plate 16 double-actuated in the arrow B direction with the surface plate 18, and, like FIG. placed at the end point of Then, the control apparatus 34 controls the conveying apparatuses 31 and 33, and advances the grindstones 10 and 12 to the abutting position of 16 A of end surfaces. In addition, the abutting position is, for each divided grindstone part 36, 38, 40, 42 of the grindstone 10, 12, according to the diameter of the grindstone, the amount of additional insertion according to the amount of grinding at the front end, and the type of bond It is set based on the degree of wear of the grindstone and the amount of additional insertion for each processing of one glass plate according to the degree of wear. And the control apparatus 34 controls the movement apparatus 20, and makes the glass plate 16 reciprocate in the arrow A direction with the surface plate 18 again.

As shown in Fig. 6(F) , the reciprocating glass plate 16 is finish-processed (that is, the third chamfering step is performed) by the end face 16A passing through the divided grindstone part 40, and the divided grindstone part 42 ) is mirror-finished by passing through (that is, the fourth chamfering process is performed).

7(A) to 7(E) are explanatory views showing another chamfering method temporally.

7(A) to 7(E), the grindstone 10 is provided with a divided grindstone part 36 and a divided grindstone part 42, and the grindstone 12 has the same divided grindstone part 40 only available.

7(A) is a state in which the height of the grindstones 10 and 12 is adjusted to the height at which the cross section 16A passes through the divided grindstone portions 36 and 40, and the glass plate 16 is moved back and forth in the arrow A direction. It is a schematic side view showing the.

Thereafter, the end face 16A of the glass plate 16 is subjected to rough grinding with the divided grindstone part 36 by the reciprocating movement of the glass plate 16 that continues as in Fig. 7(B) (that is, the first A chamfering process is implemented), and thereafter, it is finished-processed by the divided grindstone part 40 (that is, a 2nd chamfering process is implemented). The grinding force of the divided grindstone part 40 in this case is weak.

As shown in Fig. 7(C), when the finishing processing of the end surface 16A is finished and the glass plate 16 is positioned at the end point position of the reciprocation, the control device 34 of Fig. 1 controls the movement device 20, The movement of the surface plate 18 is temporarily stopped.

Thereafter, the control device 34 controls the lifting devices 26 and 28 to adjust the heights of the grindstones 10 and 12 to a height at which the end face 16A passes through the divided grindstone portions 40 and 42 . . That is, the grindstones 10 and 12 are moved upward in the direction of the arrow E in FIG. 7(C) . And the control apparatus 34 controls the movement apparatus 20, and makes the glass plate 16 double-actuate in the arrow B direction with the surface plate 18 like FIG.7(D).

As for the glass plate 16 which double-acting like FIG.7(E), the 2nd finishing process (namely, 3rd chamfering process) is given by the end surface 16A passing through the divided grindstone part 40, and the divided grindstone part It is mirror-finished by passing through (42) (that is, a fourth chamfering process is performed).

In this other chamfering method, although the grinding force of the divided grindstone part 40 at the time of reciprocation is weak, since it is ground by the divided grindstone part 40 also at the time of double acting, chamfering of the required roughness as a whole can be performed. .

8(A) to 8(E) are explanatory views showing another chamfering method temporally.

8(A) to 8(E), only the same divided grindstone part 36 is provided in the grindstone 10, and the divided grindstone part 38 and the divided grindstone part 40 are provided in the grindstone 12. has been

8(A) is a state in which the height of the grindstones 10 and 12 is adjusted to the height at which the cross-section 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved back and forth in the arrow A direction. It is a schematic side view showing the.

After that, the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone part 36 by the reciprocating movement of the glass plate 16 that continues as in Fig. 8(B) (that is, the first A chamfering process is implemented), and then, heavy grinding is carried out by the divided grindstone part 38 (that is, a 2nd chamfering process is implemented).

As shown in Fig. 8(C), when the heavy grinding processing of the end face 16A is finished and the glass plate 16 is located at the end point position of the reciprocating movement, the control device 34 of Fig. 1 controls the moving device 20, , the movement of the surface plate 18 is temporarily stopped.

Thereafter, the control device 34 controls the transport device 31 to retract the grindstone 10 from the abutting position of the end face 16A, and controls the lifting device 28 to control the end face 16A. The height of the grindstone 12 is adjusted to the height which passes this divided grindstone part 40. That is, the grindstone 12 is moved upward in the direction of the arrow E of FIG. 8(C). And the control apparatus 34 controls the movement apparatus 20, and makes the glass plate 16 double-actuate in the arrow B direction with the surface plate 18 like FIG.8(D).

As shown in FIG. 8(E) , the double-acting glass plate 16 is finish-processed when the end surface 16A passes through the divided grindstone part 40 as a 3rd chamfering process.

In this other chamfering method, mirror-finishing by the divided grindstone part 42 is not performed, but by increasing the grain size of the divided grindstone part 40, if finish processing equivalent to mirror-finishing can be performed, the grindstone 10 is It is not necessary to provide the divided grindstone part 42 .

[Features of the manufacturing method of the glass plate using the chamfering device 14]

The manufacturing method of the glass plate of embodiment of this invention,

A melting step of heating a glass raw material to obtain a molten glass;

A forming step of making the molten glass into a plate shape to obtain a glass ribbon;

A cutting step of cutting the glass ribbon to obtain a glass plate;

It has the chamfering process of chamfering a glass plate by the chamfering method of the said glass plate.

At a melting process, silica sand and another glass-making feedstock are adjusted so that it may become a desired glass composition, a raw material is thrown into a melting furnace, Preferably it heats about 1400 degreeC - 1650 degreeC, and a molten glass is obtained.

At a shaping|molding process, a float method, a fusion method, etc. are applied, a molten glass is made into a plate shape, and a glass ribbon is obtained. For example, by the float method, a molten glass is flowed on a molten metal, it is made into plate shape, and a glass ribbon is obtained.

At a cutting process, after annealing a glass ribbon, a glass ribbon is cut|disconnected to a predetermined|prescribed size, and a glass plate is obtained.

In the chamfering method, a glass plate is chamfered by the chamfering method of the above-mentioned glass plate.

According to the manufacturing method of the glass plate of this invention, the glass plate 16 with which chamfering quality improved can be manufactured.

Moreover, it is possible to cope only with the operation and soft remodeling of the control device 34 without large-scale remodeling such as extending the rotary device of the grindstone, and the time and cost required for remodeling can be significantly reduced.

Moreover, the processing quality of chamfering can be improved, without changing a processing tact, ie, without reducing the productivity of the glass plate 16 by raising the processing speed of the grindstones 10 and 12.

Moreover, as another chamfering method, the chamfering method of this invention is applicable to the chamfering method disclosed in Unexamined-Japanese-Patent No. 2008-49449. That is, in one side of a glass plate, a 1st chamfering grindstone chamfers from the substantially central part of one side to the other edge part of one side, and a 2nd chamfering grindstone chamfers from one end of the same side to the substantially central part of the same side. The chamfering device and the chamfering method of the present invention can also be applied to the chamfering method disclosed in the above publication, characterized in that it is implemented.

According to the chamfering apparatus of the glass plate which concerns on this invention, the chamfering method of a glass plate, and the manufacturing method of a glass plate, the chamfering quality of a glass plate can be improved, without increasing the number of objects of a grindstone.

In addition, all the content of the specification of JP Patent application 2014-257462 for which it applied on December 19, 2014, a claim, drawing, and an abstract is referred here, and it takes in as an indication of this invention.

10, 12: Ji-seok,
14: chamfering device;
16: glass plate,
16A ~ 16D: single-sided,
18: surface plate,
20: mobile device;
22, 24: motor;
26, 28: elevating device,
30, 32: nozzle,
31, 33: conveying device;
34: control unit;
36, 38, 40, 42: divided grindstone parts.

Claims (9)

Ji-seok and
a rotating means for rotating the grindstone about its central axis;
A first moving means for relatively moving the grindstone and the glass plate along a first direction orthogonal to the cross section of the glass plate;
a second moving means for relatively reciprocating the grindstone and the glass plate along a second direction in which the cross-section of the glass plate extends, and grinding the same cross-section of the glass plate a plurality of times;
a third moving means for relatively moving the grindstone and the glass plate along a third direction orthogonal to the main surface of the glass plate and the second direction;
control means for controlling the first moving means, the second moving means, and the third moving means;
The grindstone is composed of at least a first grindstone and a second grindstone,
The first grindstone and the second grindstone are configured in a columnar shape and divided into at least two or more divided grindstone parts in the axial direction, and the grinding ability of one divided grindstone part is higher than the grinding ability of the other divided grindstone part. Chamfering device for high glass plates. Ji-seok and
a rotating means for rotating the grindstone about its central axis;
A first moving means for relatively moving the grindstone and the glass plate along a first direction orthogonal to the cross section of the glass plate;
a second moving means for relatively reciprocating the grindstone and the glass plate along a second direction in which the cross-section of the glass plate extends, and grinding the same cross-section of the glass plate a plurality of times;
a third moving means for relatively moving the grindstone and the glass plate along a third direction orthogonal to the main surface of the glass plate and the second direction;
control means for controlling the first moving means, the second moving means, and the third moving means;
The grindstone is composed of at least a first grindstone and a second grindstone,
The first grindstone is configured in a columnar shape and is divided into at least two or more divided grindstone parts in the axial direction, and the grinding capability of the divided divided grindstone part is higher than the grinding ability of the divided other divided grindstone part;
A said 2nd grindstone is the chamfering apparatus of the glass plate which is comprised in the column shape and has the same grinding ability. 3. The method of claim 1 or 2,
The said glass plate is a square shape, The chamfering apparatus of the glass plate by which the said grindstone is arrange|positioned opposing two end surfaces of the said glass plate. The grindstone is composed of at least a first grindstone and a second grindstone,
The first grindstone and the second grindstone are configured in a columnar shape and divided into at least two or more divided grindstone parts in the axial direction, and the grinding ability of one divided grindstone part is higher than the grinding ability of the other divided grindstone part. is high,
After pressing the one divided grindstone part with high grinding ability of the said 1st grindstone to the one end surface of a glass plate, while relatively moving the said 1st grindstone and the said glass plate in the one extension direction of the said one end surface, 1 A first chamfering process of grinding the one end surface by rotating the grindstone about its central axis;
After pressing the one divided grindstone part with high grinding ability of the said 2nd grindstone to the one end surface of a glass plate, while relatively moving the said 2nd grindstone and the said glass plate in the one extension direction of the said one end surface, 2 A second chamfering process of grinding the one end surface by rotating the grindstone around its central axis;
After pressing the other divided grindstone part having a low grinding ability of the second grindstone on one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the A third chamfering process of grinding the one end surface by rotating the second grindstone about its central axis;
After pressing the other divided grindstone part having a low grinding ability of the first grindstone to one end surface of the glass plate, the first grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the A chamfering method of a glass plate comprising a fourth chamfering step of grinding the one end surface by rotating the first grindstone about its central axis. The grindstone is composed of at least a first grindstone and a second grindstone,
The first grindstone is configured in a columnar shape and is divided into at least two or more divided grindstone parts in the axial direction, and the grinding capacity of one divided divided grindstone part is higher than the grinding ability of the divided other divided grindstone part,
The second grindstone is configured in a columnar shape and is composed of the grindstone having the same grinding ability,
After pressing the one divided grindstone part with high grinding ability of the said 1st grindstone to the one end surface of a glass plate, while relatively moving the said 1st grindstone and the said glass plate in the one extension direction of the said one end surface, 1 A first chamfering process of grinding the one end surface by rotating the grindstone about its central axis;
After pressing the said 2nd grindstone to the one end surface of a glass plate, while relatively moving a said 2nd grindstone and the said glass plate in the one extension direction of the said one end surface, the said 2nd grindstone is rotated about the central axis. A second chamfering process of grinding the one end surface by
After pressing the second grindstone to one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the second grindstone is moved around its central axis A third chamfering process of grinding the one end surface by rotating;
After pressing the other divided grindstone part having a low grinding ability of the first grindstone to one end surface of the glass plate, the first grindstone and the glass plate are relatively moved in the other extension direction of the one end surface, and the A chamfering method of a glass plate comprising a fourth chamfering step of grinding the one end surface by rotating the first grindstone about its central axis. 6. The method according to claim 4 or 5,
The said glass plate is a quadrangular shape, The chamfering method of the glass plate by which the said grindstone is arrange|positioned opposing two end surfaces of the said glass plate. A melting step of heating a glass raw material to obtain a molten glass;
A forming step of making the molten glass into a plate shape to obtain a glass ribbon;
A cutting step of cutting the glass ribbon to obtain a glass plate;
It has the chamfering process of chamfering the said glass plate by the chamfering method of the glass plate of Claim 4 or 5, The manufacturing method of the glass plate characterized by the above-mentioned. delete delete

Images