WO2016098824A1 - Glass plate chamfering device, glass plate chamfering method, and glass plate production method - Google Patents

Glass plate chamfering device, glass plate chamfering method, and glass plate production method Download PDF

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Publication number
WO2016098824A1
WO2016098824A1 PCT/JP2015/085266 JP2015085266W WO2016098824A1 WO 2016098824 A1 WO2016098824 A1 WO 2016098824A1 JP 2015085266 W JP2015085266 W JP 2015085266W WO 2016098824 A1 WO2016098824 A1 WO 2016098824A1
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WO
WIPO (PCT)
Prior art keywords
grindstone
glass plate
divided
chamfering
grinding
Prior art date
Application number
PCT/JP2015/085266
Other languages
French (fr)
Japanese (ja)
Inventor
正直 中西
龍 山口
Original Assignee
旭硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 旭硝子株式会社 filed Critical 旭硝子株式会社
Priority to CN201580068960.4A priority Critical patent/CN107107295B/en
Priority to KR1020177008329A priority patent/KR102414804B1/en
Priority to JP2016564887A priority patent/JP6624461B2/en
Publication of WO2016098824A1 publication Critical patent/WO2016098824A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/14—Zonally-graded wheels; Composite wheels comprising different abrasives

Definitions

  • the present invention relates to a glass plate chamfering apparatus, a glass plate chamfering method, and a glass plate manufacturing method.
  • a glass plate for FPD (Flat Panel Display) used in liquid crystal displays, plasma displays, etc. is a molding process for forming molten glass into a strip-shaped plate glass (also referred to as a glass ribbon). It is manufactured through a cutting step of cutting into a plate and a chamfering step of grinding and polishing the end face of the glass plate.
  • Patent Document 1 discloses a chamfering device used in the chamfering process.
  • Patent Document 1 transports a glass plate (workpiece) held by a holding unit to a position where a primary end surface grinding unit is installed by a transport mechanism, and performs grinding processing on both end surface portions. . Subsequently, a glass plate is conveyed to the position where the secondary end surface grinding part was installed, and the grinding process is performed about the both end surface part. Patent Document 1 also discloses that an end surface polishing portion is provided on the downstream side in the conveyance direction of the glass plate in order to perform mirror finishing on the end surface of the glass plate.
  • the chamfering device described in Patent Document 2 includes a metal bond grindstone having a V-shaped groove for grinding on the outer peripheral surface and an elastic grindstone having a flat outer peripheral surface which is a polishing surface.
  • the end surface of the glass plate is ground by the V-shaped groove of the metal bond grindstone to form a chamfered surface on the end surface, and then the chamfered surface is formed by the flat outer peripheral surface of the elastic grindstone. Grind.
  • JP 2013-198974 A Japanese Patent Laid-Open No. 2001-9589
  • fine dust also referred to as particles adhering to the surface of the glass plate. That is, fine dust becomes a foreign substance when an element such as an electrode is formed on the surface of the glass plate.
  • the conventional chamfering apparatus has a problem that it is difficult to chamfer the liquid crystal display to the specifications accompanying the recent high definition.
  • the chamfering apparatus of the glass plate which can improve the chamfering quality of a glass plate, without increasing the number of grindstones, the chamfering method of a glass plate, and glass It aims at providing the manufacturing method of a board.
  • the glass plate chamfering apparatus of the present invention provides: Whetstone, Rotating means for rotating the grindstone about its central axis, and first moving means for relatively moving the grindstone and the glass plate along a first direction orthogonal to the end surface of the glass plate; A second moving means for relatively reciprocating the grindstone and the glass plate along a second direction in which the end surface of the glass plate extends, and grinding the same end surface of the glass plate a plurality of times; 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; It is characterized by providing.
  • the glass plate chamfering method of the present invention provides:
  • the grindstone is composed of upper and lower divided grindstone portions. After pressing one divided grindstone portion of the upper and lower divided grindstone portions against one end surface of the glass plate, the grindstone and the glass plate are A first grinding step of grinding the one end face by rotating the one end grindstone part about its central axis while relatively moving in one extending direction of the end face; After pressing the other divided grindstone portion of the upper and lower divided grindstone portions of the grindstone against the one end surface of the glass plate, the grindstone and the glass plate are moved to the other extending direction of the one end surface or one of the one end surfaces.
  • the method for producing a glass plate of the present invention comprises a melting step of obtaining a molten glass by heating a glass raw material, a forming step of obtaining a glass ribbon by forming the molten glass into a plate shape, and the glass A cutting step of cutting a ribbon to obtain a glass plate, and a chamfering step of chamfering the glass plate by a chamfering method of the glass plate.
  • the grindstone is composed of at least a first grindstone and a second grindstone, and the first grindstone and the second grindstone are configured in a column shape.
  • the grinding ability of one of the divided grindstone parts is higher than the grinding ability of the other divided grindstone part.
  • 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 cylindrical shape and divided into at least two divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion is divided. It is higher than the grinding ability of the other divided grindstone part, After pressing one divided grindstone portion having a high grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are relatively opposed to one extending direction of the one end surface.
  • a first chamfering step of grinding the one end face by rotating the first grindstone about its central axis After pressing one divided grindstone portion having a high grinding ability of the second grindstone against one end face of the glass plate, the second grindstone and the glass plate are relatively opposed to one extending direction of the one end face.
  • a second chamfering step of grinding the one end face by rotating the second grindstone about its central axis After pressing the other divided grindstone part having a low grinding ability of the second grindstone against one end surface of the glass plate, the second grindstone and the glass plate are placed in the other extending direction of the one end surface.
  • the grindstone is composed of at least a first grindstone and a second grindstone, and the first grindstone is formed in a column shape and has at least 2 in the axial direction.
  • the divided grindstone portion is divided into two or more divided grindstone portions, and the grindability of one of the divided grindstone portions is higher than the grindability of the divided divided grindstone portion, and the second grindstone is configured in a cylindrical shape and is the same It is preferable to have a grinding ability of
  • the grindstone is composed of at least a first grindstone and a second grindstone
  • the first grindstone is formed in a cylindrical shape and is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of one of the divided grindstone portions is that of the other divided grindstone portion. It is higher than the grinding ability
  • the second grindstone is constituted by the grindstone having a cylindrical shape and the same grinding ability, After pressing one divided grindstone portion having a high grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are relatively opposed to one extending direction of the one end surface.
  • a first chamfering step of grinding the one end face by rotating the first grindstone about its central axis After the second grindstone is pressed against one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in one extending direction of the one end surface, and the second A second chamfering step of grinding the one end face by rotating a grindstone about its central axis; After the second grindstone is pressed against one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extending direction of the one end surface, and the second A third chamfering step of grinding the one end face by rotating the grindstone about the central axis; After pressing the other divided grindstone portion having a low grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are placed in the other extending direction of the one end surface.
  • the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
  • the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
  • a chamfering apparatus and a chamfering method according to the present invention include a first grinding step in which a grindstone is moved forward (1 pass) relative to one end surface of a glass plate to perform grinding, and one glass plate is ground. Grinding the same end face multiple times without increasing the number of grindstones in the second grinding process in which the grindstone is moved backward (2 Pass) relative to the end face in the other direction. It is characterized by chamfering. Also, by repeating the forward movement twice (from 1 Pass to 2 Pass), the same end face can be chamfered without increasing the number of grindstones.
  • the grindstone configured in the columnar shape is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion is set to the other divided grindstone. It is higher than the grinding ability of the part. That is, a single grindstone is provided with a plurality of performances, and a grindstone portion selected according to the performance is used for chamfering a glass plate. For example, when performing the 1st grinding process with respect to an end surface, it grinds by pressing one division grindstone part with high grinding capability to the end surface of a glass plate. Next, when performing the 2nd chamfering process, it grinds by pressing the other division grindstone part with low grinding ability to the end surface.
  • one grindstone has two or more kinds of grinding ability. Therefore, as the grindstone, at least two of the first grindstone and the second grindstone are provided, each of the first grindstone and the second grindstone is divided in the axial direction, and a divided grindstone portion is provided. Rough grinding is performed at the divided grindstone part of the eye, intermediate grinding is performed at the second divided grindstone part, finishing is performed at the third divided grindstone part, and the fourth divided grindstone part is formed. Mirror processing can also be performed. Moreover, you may give four types of grinding ability to one grindstone. The first grindstone is divided into four in the axial direction, four divided grindstone portions are provided, rough grinding is performed with the first divided grindstone portion, and intermediate grinding is performed with the second divided grindstone portion.
  • Processing may be performed, finishing may be performed at the third divided grindstone, and mirror processing may be performed at the fourth divided grindstone. If it does in this way, the 2nd whetstone is unnecessary.
  • the technical idea of the present invention is that the chipping and cracks generated on the end face by the previous stage processing are gradually removed in a plurality of subsequent process steps, and the end face is processed into a mirror surface in the final process step.
  • One grindstone is provided with a plurality of grindstones having different grinding capabilities.
  • the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
  • the “grinding ability” described in the specification and claims refers to the first grinding step, the second grinding step, the first chamfering step, the second chamfering step, and the third chamfering as described above. It means the grinding / polishing ability of the grindstone used in the process, the fourth chamfering process, etc., that is, the performance of the grindstone. As shown below, the grindstone can be broadly classified into a grindstone mainly composed of “grinding” and a grindstone mainly composed of “polishing”.
  • the grindstone mainly composed of “grinding” can be exemplified by a hard grindstone in which abrasive grains of diamond or CBN (Cubic Boron Nitride) are fixed with metal bonds.
  • An electrodeposited diamond grindstone can also be exemplified.
  • a grindstone mainly composed of “polishing” is a grindstone such as diamond, green silicon carbide (GC), alumina (Al 2 O 3 ), pumice, or garnet fixed with a bond such as butyl rubber, natural rubber, or resin.
  • a whetstone can be illustrated.
  • a plurality of types of polishing such as finishing and mirror finishing can be performed.
  • the “columnar shape” that is the shape of the grindstone includes a disk shape and a cylindrical shape.
  • those in which a ring-shaped groove is formed on the surface of the grindstone and those in which the surface is flat are also included in the “columnar shape”.
  • the one end surface of the glass plate is chamfered at 1 Pass (forward movement) in the second direction.
  • the grindstone and the glass plate are thirdly processed. Is moved relatively in the direction of 2 and 2 Pass (return) in the second direction.
  • the 2nd chamfering process namely, 2nd chamfering process
  • one grindstone of the first grindstone first hitting one end surface is used as a grindstone for rough grinding, and the other grindstone Is a grindstone for mirror finishing. Then, one grindstone of the second grindstone that comes into contact with one end face is used as a medium grinding grindstone, and the other grindstone is used as a finishing grindstone.
  • 1 pass processing is performed with one grindstone of the first grindstone and one grindstone of the second grindstone, and then the other grindstone of the second grindstone and the other grindstone of the first grindstone. 2Pass processing.
  • the processing steps constituted by rough grinding and finishing in the conventional chamfering apparatus can be performed in the present invention without increasing the number of grindstones, rough grinding, medium grinding, finishing, and mirror finishing. It can be configured in four processing steps. For example, as described above, the above four steps can be performed by using two grindstones. Therefore, in this invention, chamfering quality can be improved significantly, without increasing the number of grindstones.
  • one grindstone of the first grindstone first hitting the one end face is a grindstone for rough grinding
  • the other grindstone is a grindstone for mirror finish.
  • the grindstone of the second grindstone that comes next to one end face is used as a grindstone for medium grinding.
  • 1 Pass processing is performed with one grindstone of the first grindstone and the second grindstone, and then 2 Pass processing is performed with the second grindstone and the other grindstone of the first grindstone.
  • the first grindstone that first hits one end face is used as a grindstone for rough grinding. And let the 2nd grindstone which hits one end surface next be a grindstone for medium grinding.
  • 1 Pass processing is performed with the first grindstone and the second grindstone, and then 2 Pass processing is performed with the second grindstone.
  • the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
  • the four end surfaces of a rectangular glass plate can be efficiently chamfered by turning the glass plate 90 degrees with respect to the grindstone.
  • the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
  • the 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.
  • the principal part expansion perspective view which showed the up-and-down arrangement position of the grindstone in the forward movement of the arrow A direction of a glass plate
  • the principal part expansion perspective view which showed the up-and-down arrangement position of the grindstone in the backward movement of the arrow B direction of a glass plate 4 (A), 4 (B), 4 (C), 4 (D), and 4 (E) show the state in which the end face of the glass plate is sequentially chamfered by each grindstone.
  • FIG. 5 (E) are explanatory views showing the chamfering method by the chamfering apparatus of the embodiment continuously.
  • 6 (A), 6 (B), 6 (C), 6 (D), 6 (E), and 6 (F) show other chamfering methods by the chamfering apparatus according to the embodiment.
  • Explanatory diagram FIG. 7A, FIG. 7B, FIG. 7C, FIG. 7D, and FIG. 7E are explanatory diagrams showing another chamfering method of the embodiment over time.
  • FIG. 8A, FIG. 8B, FIG. 8C, FIG. 8D, and FIG. 8E are explanatory diagrams that show other chamfering methods of the embodiment over time.
  • FIG. 1 shows a first grindstone 10 (hereinafter, the first grindstone 10 is simply referred to as a grindstone 10) and a second grindstone 12 (hereinafter, the second grindstone 12 is simply referred to as a grindstone 12) according to an embodiment of the present invention.
  • It is a top view which shows schematic structure of the chamfering apparatus 14 of the glass plate of embodiment provided with each pair.
  • This chamfering device 14 is a device used in the chamfering step in the glass plate manufacturing method of the embodiment including a melting step, a molding step, a cutting step, and a chamfering step.
  • chamfering device 14 a device for chamfering the four end surfaces 16A to 16D of the glass plate 16 for liquid crystal display having a thickness of 0.7 mm or less with the grindstones 10 and 12 is illustrated.
  • the grindstones 10 and 12 will be described later.
  • the glass plate applicable to the chamfering device 14 is not limited to the liquid crystal display glass plate 16.
  • other glass plates for FPD such as a glass plate for plasma display and a glass plate for LED display may be used, and general glass plates for solar cells, lighting, building materials, mirrors, etc. may be used.
  • the thickness of a glass plate is not limited to 0.7 mm or less, The thickness exceeding 0.7 mm may be sufficient.
  • it is not limited to a glass plate, and the end face can be chamfered by the chamfering device 14 even if it is a plate made of metal or resin.
  • the chamfering device 14 moves the surface plate 18 that sucks and holds the rectangular glass plate 16 and the surface plate 18 in the horizontal direction (second direction) in the direction of arrow A (that is, 1 Pass) and in the direction of arrow B.
  • a moving device (that is, second moving means) 20 that moves (2 Pass) and grinds the same end faces 16A and 16B a plurality of times is provided.
  • the chamfering device 14 according to the embodiment is a device that reciprocates the glass plate 16 with respect to the grindstones 10 and 12 that are fixedly arranged. However, the grindstones 10 and 12 and the glass plate 16 are connected to the end surface of the glass plate 16. Any device that reciprocally moves in the horizontal direction along the extending direction of 16A and 16B may be used.
  • the chamfering device 14 is pressed against the end faces 16A to 16D of the glass plate 16 to rotate the chamfered surfaces into end faces 16A to 16D, and a motor (rotation) for rotating the grindstones 10 and 12 at high speed.
  • Means 22 and 24 Two grindstones 10 and 12 are disposed on the opposing end surfaces 16A and 16B of the glass plate 16, but three or more grindstones may be disposed.
  • the chamfering device 14 is processed by the elevating devices (that is, third moving means) 26 and 28 that move the grindstones 10 and 12 in the vertical direction (third direction) together with the motors 22 and 24 and the grindstones 10 and 12.
  • the nozzles 30 and 32 which inject a cooling liquid to a part, the control apparatus (control means) 34, etc. are provided.
  • feeding devices (that is, first moving means) 31 and 33 are provided.
  • the chamfering apparatus 14 of embodiment is an apparatus which raises / lowers the grindstones 10 and 12 with respect to the glass plate 16, the grindstones 10 and 12 and the glass plate 16 are made into the main surface 16E of the glass plate 16 (FIG. 2). And a device that relatively moves up and down along the vertical direction orthogonal to the horizontal direction. Moreover, it is not limited to the apparatus which moves the grindstones 10 and 12 forward and backward by the feeding devices 31 and 33 with respect to the end face 16A, and any apparatus that relatively moves the end face 16A of the glass plate 16 and the grindstones 10 and 12 forward and backward. Good.
  • the grinding allowance is set according to the feed amounts of the feeding devices 31 and 33. Further, the feed amount is controlled by the control device 34 based on the grinding ability and performance of the grindstones 10 and 12.
  • the control device 34 controls the operations of the moving device 20, the rotation speed / rotation direction of the motors 22 and 24, the lifting devices 26 and 28, and the feeding devices 31 and 33. A method of controlling each operation by the control device 34 will be described later.
  • FIG. 2 is an enlarged perspective view of a main part showing the vertical arrangement positions of the grindstones 10 and 12 during the forward movement of the glass plate 16 in the arrow A direction.
  • FIG. 3 is an enlarged perspective view of a main part showing the vertical positions of the grindstones 10 and 12 during the backward movement of the glass plate 16 in the direction of arrow B.
  • the grindstone 10 is rotationally driven by the motor 22 around the central axis 10A. Further, when the motor 22 is controlled by the control device 34 (see FIG. 1), the rotation speed is controlled, and the forward and reverse rotation directions indicated by the arrow C in FIG. 2 and the arrow D in FIG. 3 are controlled. .
  • the grindstone 10 is rotated in the arrow C direction opposite to the forward movement direction.
  • the glass plate 16 is moved backward in the arrow B direction
  • the rotation direction is converted to the arrow D direction opposite to the backward movement direction.
  • conversion of the rotation direction of the grindstone 10 is not essential. By not changing the rotation direction of the grindstone, the processing time can be shortened.
  • the grindstone 12 is rotationally driven by the motor 24 around the central axis 12A. Further, when the motor 24 is controlled by the control device 34 (see FIG. 1), the rotation speed is controlled, and the forward and reverse rotation directions indicated by the arrow C in FIG. 2 and the arrow D in FIG. 3 are controlled. .
  • the grindstone 12 is rotated in the arrow C direction opposite to the forward movement direction.
  • the glass plate 16 is moved backward in the arrow B direction
  • the rotation direction is converted to the arrow D direction opposite to the backward movement direction.
  • conversion of the rotation direction of the grindstone 12 is not essential.
  • the grindstone 10 is divided into two grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion (the upper divided grindstone portion 36 in the illustrated example) is higher than the other divided grindstone portion (in the illustrated example upper portion). Is set to be higher than the grinding ability of the divided grindstone portion 42).
  • the grindstone 12 is divided into two divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion (upper divided grindstone portion 38) is the same as that of the other divided grindstone portion (lower divided grindstone portion 40). It is set higher than the grinding ability.
  • segmentation number of the grindstones 10 and 12 is not limited to two, You may divide
  • the divided grindstone portions 36, 38, 40, and 42 of the embodiment perform rough grinding (that is, first chamfering step: first grinding step) on the end surfaces 16A and 16B by the reciprocating movement of the glass plate 16 described above.
  • Medium grinding ie, second chamfering step: first grinding step
  • finishing ie, third chamfering step: second grinding step
  • mirror finishing ie, fourth chamfering step: first
  • Each grinding ability, that is, the performance is set so that the second grinding step) can be performed sequentially.
  • the divided grindstone portion 36 can perform rough grinding
  • the divided grindstone portion 38 can perform medium grinding
  • the divided grindstone portion 40 can perform finish processing
  • the divided grindstone portion 42 can perform mirror surface machining.
  • the performance is set as follows.
  • 4 (A) to 4 (E) are explanatory views showing the state in which the same end surface 16A of the glass plate 16 is sequentially chamfered by the divided grindstone portions 36, 38, 40, 42. is there.
  • FIG. 4 (A) shows the shape of the end face 16A of the glass plate 16 before chamfering. That is, the end surface 16A of the glass plate 16 is a cut surface that is cut in a cutting step preceding the chamfering step, and is formed in a direction orthogonal to the main surface 16E.
  • FIG. 4B shows the shape of the end face 16A subjected to rough grinding by the divided grindstone portion 36, and an annular groove 36A having a U-shaped cross section (FIG. 2, FIG. 2), which is a grinding groove of the divided grindstone portion 36. (See FIG. 3).
  • the roughness of the end face 16A after the rough grinding is rough, and chipping and cracks caused by the rough grinding are frequently generated on the surface.
  • the cross-sectional shape of the annular groove 36A of the divided grindstone portion 36 shown in FIGS. 2 and 3 is not limited to a U shape, and may be a V shape or a concave shape. Further, the number of the annular grooves 36A may be one, but it is preferable to provide a plurality of annular grooves 36 at a predetermined interval in the axial direction of the divided grindstone portion 36 in order to omit the replacement work of the divided grindstone portion 36. Since the plurality of annular grooves 36A are provided in the divided grindstone portion 36, when the annular groove 36A in use reaches the end of its life, the lifting device 26 raises and lowers the divided grindstone portion 36 in the axial direction in units of the pitch of the annular grooves 36A. In this case, the end face 16A can be roughly ground using the new annular groove 36A without replacing the divided grindstone 36.
  • FIG. 4C shows the shape of the end face 16 ⁇ / b> A that has been subjected to medium grinding by the divided grindstone portion 38.
  • FIG. 4 (D) shows the shape of the end face 16 ⁇ / b> A that has been finished by the divided grindstone 40.
  • FIG. 4 (E) shows the shape of the end face 16 ⁇ / b> A that has been finished by the divided grindstone portion 42.
  • the end face 16A is mirror-finished. That is, the end surface 16A is processed into a mirror surface that is assumed not to generate dust from the end surface 16A.
  • the divided grindstone portions 36 and 38 that mainly perform “grinding”, a hard grindstone in which abrasive grains of diamond or CBN are fixed with metal bonds can be exemplified.
  • An electrodeposited diamond grindstone can also be exemplified.
  • the grain size of the abrasive grains of the divided grindstone 36 is 325 to 500.
  • the grain size of the abrasive grains of the divided grindstone 38 is 420 to 600.
  • grindstones such as diamond, CBN, green silicon carbide (GC), alumina (Al 2 O 3 ), pumice, or garnet are made of butyl rubber, natural rubber, Or the grindstone fixed with bonds, such as resin, can be illustrated. Further, by setting the grain size of the abrasive grains of the divided grindstone portion 40 to, for example, 270 to 800 and setting the grain size of abrasive grains of the divided grindstone portion 42 to, for example, 600 to 4000, finishing processing is performed by the divided grindstone portion 40. Mirror surface processing can be performed by the divided grindstone portion 42.
  • the divided grindstone 38 is a grindstone in which a grindstone such as diamond, CBN, green silicon carbide (GC), alumina (Al 2 O 3 ), pumice, or garnet is fixed with a bond such as butyl rubber, natural rubber, or resin.
  • the medium grinding can be performed by setting the grain size of the abrasive grains of the divided grindstone 38 to, for example, 400-600.
  • the grinding allowance by the grindstones 10 and 12 is set in the control device 34 of FIG. 1, and the forward speed and the backward speed of the surface plate 18 are set.
  • the control device 34 for controlling the moving device 20 so that the processing time at 1 Pass and 2 Pass (reciprocating) of the embodiment and the conventional 1 Pass processing time are substantially equal. It is preferable to set the operation program. If it does in this way, the chamfering quality of the glass plate 16 can be improved in the time equivalent to the process by the conventional 1Pass.
  • the grain size of the abrasive grains of the divided grindstone portion 36 is preferably 200 to 450, and the grain size of the abrasive grains of the divided grindstone portion 38 is preferably 350 to 500.
  • the forward 1 Pass machining time and the backward 2 Pass machining time may be set to be equal.
  • the motors 22 and 24 are controlled so that the grindstones 10 and 12 rotate in the direction of the arrow C when the glass plate 16 moves forward by the surface plate 18, and the grindstones 10 and 12 rotate in the direction of the arrow D when returning.
  • An operation program for the control device 34 is set. As described above, the rotational direction of the grindstones 10 and 12 may be constant without conversion.
  • the glass plate 16 cut in the cutting step is sucked and held on the suction surface on the upper surface of the surface plate 18.
  • the control device 34 controls each member of the chamfering device 14 and starts chamfering of the end surfaces 16A and 16B of the glass plate 16.
  • control device 34 controls the moving device 20 to move the glass plate 16 forward in the direction of arrow A in FIG.
  • control apparatus 34 controls the motors 22 and 24, and rotates the grindstones 10 and 12 to the arrow C direction of FIG.
  • control apparatus 34 controls the raising / lowering apparatuses 26 and 28, and adjusts the height of the grindstones 10 and 12 to the height which the end surface 16A passes the division
  • 5 (A) to 5 (E) are explanatory views showing the chamfering method by the chamfering device 14 continuously.
  • FIG. 5A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end face 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved forward in the arrow A direction. It is a schematic side view.
  • the end surface 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 by the forward movement of the glass plate 16 as shown in FIG. Medium grinding is performed by the grindstone 38. That is, a second chamfering process is performed.
  • coolant is sprayed from the nozzles 30 and 32 in FIG. 1 to the processing portion where the grindstones 10 and 12 and the end face 16A are in contact with each other.
  • production of the burning, chipping, etc. which arise in the end surface 16A of the glass plate 16 can be reduced.
  • chipping generated on the boundary surfaces between the two main surfaces of the glass plate 16 and the end surfaces 16A and 16B can be reduced.
  • An example of the coolant is pure water.
  • the control device 34 controls the moving device 20 to move the glass plate 16 backward in the direction of arrow B by the surface plate 18.
  • the control apparatus 34 controls the motors 22 and 24, and rotates the grindstones 10 and 12 to the arrow D direction of FIG. 1 controls the elevating devices 26 and 28 to adjust the height of the grindstones 10 and 12 to a height at which the end surface 16A passes through the divided grindstone portions 40 and 42. That is, the grindstones 10 and 12 are moved up in the direction of arrow E in FIG.
  • FIG. 5 (D) is a schematic side view showing a state at the start of the backward movement.
  • the returning glass plate 16 is finished by the end face 16A passing through the divided grindstone portion 40 (that is, subjected to a third chamfering step), and passes through the divided grindstone portion 42.
  • mirror finishing is performed (that is, a fourth chamfering step is performed).
  • the end faces 16C and 16D may be chamfered.
  • the glass plate 16 is rotated by 90 degrees about the perpendicular in the main surface direction of the glass plate 16 by the surface plate 18. Then, while moving the glass plate 16 in the A direction by the surface plate 18, the pair of grindstones 10, 12 whose intervals are changed according to the length in the extending direction of the end surfaces 16 A, 16 B of the glass plate 16.
  • the end faces 16C and 16D may be chamfered.
  • the grindstone 10 (including the grindstone 12) of the embodiment is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of the divided grindstone portion 36 is higher than the grinding ability of the divided grindstone portion 42. . That is, a single grindstone 10 has a plurality of performances, and a grindstone selected according to the performance is used for chamfering the glass plate 16.
  • the divided grindstone portion 36 having a high grinding ability is pressed against the end surface 16A of the glass plate 16 for processing.
  • the 2nd chamfering process it processes by pressing the division grindstone part 42 with low grinding ability to the end surface 16A.
  • the present invention is characterized in that one grindstone 10 has two or more types of performance. Therefore, as the grindstone, at least two of the first grindstone and the second grindstone are provided, each of the first grindstone and the second grindstone is divided in the axial direction, and a divided grindstone portion is provided. Rough grinding is performed at the divided grindstone part of the eye, intermediate grinding is performed at the second divided grindstone part, finishing is performed at the third divided grindstone part, and the fourth divided grindstone part is formed. Mirror processing can also be performed. Moreover, you may give four types of grinding ability to one grindstone. The first grindstone is divided into four parts in the axial direction to provide four divided grindstone parts, rough grinding is performed with the first divided grindstone part, and intermediate grinding is performed with the second divided grindstone part. Processing may be performed, finishing may be performed at the third divided grindstone, and mirror processing may be performed at the fourth divided grindstone. If it does in this way, the 2nd whetstone is unnecessary.
  • the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
  • the conventional chamfering apparatus is compared with the chamfering apparatus 14 of the embodiment.
  • the conventional chamfering device is a device that chamfers the end surface 16A by moving the glass plate 16 by 1 Pass (forward movement) in the direction of arrow A with respect to the grindstone.
  • the chamfering device 14 of the embodiment changes the height of the grindstone 10 after the end of 1 Pass, causes the glass plate 16 to pass 2 passes (that is, backward) in the direction of arrow B, and ends 16A of the glass plate 16. 2 is a device for performing a second chamfering process. Therefore, the chamfering method by the conventional chamfering apparatus and the chamfering method by the chamfering apparatus 14 of the embodiment are completely different.
  • FIG. 6 (A) to 6 (F) are explanatory views showing another chamfering method by the chamfering device 14 continuously.
  • the grindstone 10 includes a divided grindstone portion 36 and a divided grindstone portion 40
  • the grindstone 12 includes a divided grindstone portion 38 and a divided grindstone portion 42. It has been.
  • FIG. 6A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end face 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved forward in the arrow A direction. It is a schematic side view.
  • the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 by the forward movement of the glass plate 16 as shown in FIG.
  • intermediate grinding is performed by the divided grindstone 38.
  • the control device 34 controls the feeding devices 31 and 33 to retract the grindstones 10 and 12 from the contact position of the end surface 16A, and also controls the lifting devices 26 and 28 so that the end surface 16A has the divided grindstone portion 40. , 42 is adjusted to a height that passes through 42. That is, the grindstones 10 and 12 are moved up in the direction of arrow E in FIG. Then, the control device 34 controls the moving device 20 to move the glass plate 16 backward in the direction of arrow B by the surface plate 18, and is positioned at the end position of the backward movement of the glass plate 16 as shown in FIG. Let Thereafter, the control device 34 controls the feeding devices 31 and 33 to move the grindstones 10 and 12 forward to the contact position of the end surface 16A.
  • the contact position refers to the grindstone diameter, the additional driving amount corresponding to the preceding grinding amount, and the grindstone depending on the bond type for each of the divided grindstone portions 36, 38, 40, 42 of the grindstone 10, 12. This is set based on the degree of wear and the amount of additional driving for each processing of one glass plate according to the degree of wear. Then, the control device 34 controls the moving device 20 to move the glass plate 16 forward again in the arrow A direction by the surface plate 18.
  • the forwardly moving glass plate 16 is finished by the end surface 16A passing through the divided grindstone portion 40 (that is, subjected to the third chamfering step) and passes through the divided grindstone portion 42.
  • mirror finishing is performed (that is, a fourth chamfering step is performed).
  • FIGS. 7A to 7E are explanatory diagrams showing other chamfering methods over time.
  • the grindstone 10 is provided with a divided grindstone portion 36 and a divided grindstone portion 42, and the grindstone 12 is provided with only the same divided grindstone portion 40. .
  • FIG. 7A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end surface 16A passes through the divided grindstone portions 36 and 40, and the glass plate 16 is moved forward in the arrow A direction. It is a schematic side view.
  • the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 (ie, the first chamfering step is performed) by the continuous movement of the glass plate 16 as shown in FIG. 7B. After that, finishing is performed by the divided grindstone portion 40 (that is, a second chamfering step is performed). In this case, the grinding force of the divided grindstone 40 is weak.
  • control device 34 in FIG. 1 controls the moving device 20 to move the surface plate 18. Is temporarily stopped.
  • control device 34 controls the elevating devices 26 and 28 to adjust 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. That is, the grindstones 10 and 12 are moved up in the direction of arrow E in FIG. Then, the control device 34 controls the moving device 20 to move the glass plate 16 back in the arrow B direction by the surface plate 18 as shown in FIG.
  • the glass plate 16 that moves backward is subjected to the second finishing process (that is, the third chamfering step) when the end face 16A passes through the divided grindstone portion 40, and the divided grindstone portion 42 is obtained. Is mirror-finished (that is, a fourth chamfering step is performed).
  • the grinding force of the divided grindstone portion 40 at the time of forward movement is weak, but since it is ground by the divided grindstone portion 40 also at the time of backward movement, it is possible to carry out chamfering with the required roughness as a whole. .
  • 8 (A) to 8 (E) are explanatory diagrams showing other chamfering methods over time.
  • the grindstone 10 includes only the same divided grindstone portion 36, and the grindstone 12 includes the divided grindstone portion 38 and the divided grindstone portion 40.
  • FIG. 8A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end face 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved forward in the direction of arrow A. It is a schematic side view.
  • the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 (ie, the first chamfering step is performed) by the continuous movement of the glass plate 16 as shown in FIG. 8B. After that, the grinding is performed by the divided grindstone portion 38 (that is, the second chamfering process is performed).
  • control device 34 controls the feeding device 31 to retract the grindstone 10 from the contact position of the end surface 16A and also controls the lifting device 28 so that the end surface 16A passes through the divided grindstone portion 40.
  • the height of the grindstone 12 is adjusted. That is, the grindstone 12 is moved upward in the direction of arrow E in FIG.
  • control device 34 controls the moving device 20 to move the glass plate 16 back in the arrow B direction by the surface plate 18 as shown in FIG.
  • the returning glass plate 16 is finished by the end face 16A passing through the divided grindstone portion 40 as a third chamfering step.
  • the mirror surface processing by the divided grindstone portion 42 is not performed.
  • the finishing processing equivalent to the mirror surface processing can be performed by increasing the particle size of the divided grindstone portion 40, the divided grindstone portion 42 is applied to the grindstone 10. It is not necessary to have.
  • the manufacturing method of the glass plate of the embodiment of the present invention is as follows.
  • a chamfering step of chamfering the glass plate by the chamfering method of the glass plate, Have In the melting step, silica sand and other glass raw materials are adjusted so as to have a desired glass composition, and the raw materials are put into a melting furnace, and preferably heated to about 1400 ° C. to 1650 ° C. to obtain a molten glass.
  • a glass ribbon is obtained by applying a float method, a fusion method or the like to form a molten glass into a plate shape.
  • molten glass is flowed on a molten metal to obtain a glass ribbon.
  • the glass ribbon is cut into a predetermined size to obtain a glass plate.
  • the chamfering method the glass plate is chamfered by the above-described chamfering method of the glass plate. According to the glass plate manufacturing method of the present invention, the glass plate 16 with improved chamfering quality can be manufactured.
  • the chamfering method of the present invention can be applied to the chamfering method disclosed in Japanese Patent Laid-Open No. 2008-49449. That is, the first chamfering grindstone chamfers from approximately the center of one side to the other end of one side on one side of the glass plate, and the second chamfering grindstone from one end of the same side to the same side.
  • the chamfering apparatus and the chamfering method of the present invention can also be applied to the chamfering method disclosed in the above-mentioned publication, which is characterized in that chamfering is performed up to approximately the center of the above.
  • the chamfering quality of the glass plate can be improved without increasing the number of grindstones.

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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
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Abstract

Provided are a glass plate chamfering device, glass plate chamfering method, and glass plate production method with which chamfering quality in a glass plate can be improved without increasing the number of grindstones. A grindstone (10) formed in a cylindrical shape is divided in an axial direction into at least two divided grindstone portions, whereby the grinding performance of one divided grindstone portion (36) is configured to be higher than the grinding performance of the other divided grindstone portion (42). In other words, one grindstone (10) is endowed with a plurality of capabilities, and a divided grindstone portion (36, 42) selected in accordance with capabilities is used for chamfering a glass plate (16). For example, when carrying out a first chamfering process on an end surface (16A), grinding is carried out by pushing the divided grindstone portion (36) against the end surface (16A) of the glass plate (16). Then, when carrying out a second chamfering process, grinding is carried out by pushing the divided grindstone portion (42) against the end surface (16A).

Description

ガラス板の面取り装置、ガラス板の面取り方法、及びガラス板の製造方法Glass plate chamfering apparatus, glass plate chamfering method, and glass plate manufacturing method
　本発明は、ガラス板の面取り装置、ガラス板の面取り方法、及びガラス板の製造方法に関する。 The present invention relates to a glass plate chamfering apparatus, a glass plate chamfering method, and a glass plate manufacturing method.
　液晶ディスプレイ、プラズマディスプレイ等に使用されるＦＰＤ（Flat Panel Display）用のガラス板は、溶融ガラスを帯状の板ガラス（ガラスリボンとも言う。）に成形する成形工程、板ガラスを所定の矩形状サイズのガラス板に切断する切断工程、及びガラス板の端面を研削して研磨する面取り工程を経ることにより製造される。 A glass plate for FPD (Flat Panel Display) used in liquid crystal displays, plasma displays, etc. is a molding process for forming molten glass into a strip-shaped plate glass (also referred to as a glass ribbon). It is manufactured through a cutting step of cutting into a plate and a chamfering step of grinding and polishing the end face of the glass plate.
　特許文献１には、前記面取り工程にて使用される面取り装置が開示されている。 Patent Document 1 discloses a chamfering device used in the chamfering process.
　特許文献１の面取り装置は、保持手段に保持されたガラス板（ワーク）を、搬送機構によって、１次端面研削部が設置された位置に搬送し、その両端面部分について、研削加工処理を行う。次いで、２次端面研削部が設置された位置にガラス板を搬送し、その両端面部分について研削加工処理を行う。また、特許文献１には、ガラス板の端面について鏡面仕上げを行うために、ガラス板の搬送方向下流側に端面研磨部を設けることも開示されている。 The chamfering apparatus of Patent Document 1 transports a glass plate (workpiece) held by a holding unit to a position where a primary end surface grinding unit is installed by a transport mechanism, and performs grinding processing on both end surface portions. . Subsequently, a glass plate is conveyed to the position where the secondary end surface grinding part was installed, and the grinding process is performed about the both end surface part. Patent Document 1 also discloses that an end surface polishing portion is provided on the downstream side in the conveyance direction of the glass plate in order to perform mirror finishing on the end surface of the glass plate.
　一方、特許文献２に記載された面取り装置は、研削用のＶ形溝を外周面に備えたメタルボンド砥石と、研磨面である外周面が扁平な弾性砥石とを備えている。特許文献２の面取り装置によれば、前記メタルボンド砥石のＶ形溝によってガラス板の端面を研削して端面に面取り面を形成し、その後、前記面取り面を前記弾性砥石の扁平な外周面によって研磨する。 On the other hand, the chamfering device described in Patent Document 2 includes a metal bond grindstone having a V-shaped groove for grinding on the outer peripheral surface and an elastic grindstone having a flat outer peripheral surface which is a polishing surface. According to the chamfering device of Patent Document 2, the end surface of the glass plate is ground by the V-shaped groove of the metal bond grindstone to form a chamfered surface on the end surface, and then the chamfered surface is formed by the flat outer peripheral surface of the elastic grindstone. Grind.
特開２０１３－１９８９７４号公報JP 2013-198974 A 特開２００１－９６８９号公報Japanese Patent Laid-Open No. 2001-9589
　ところで、最近では、液晶ディスプレイの高精細化に伴い、ガラス板の表面に付着している微細な塵（パーティクルとも言う。）に対する品質要求が高くなってきている。つまり、微細な塵が、ガラス板の表面に電極等の素子を形成する際の異物となるからである。 By the way, recently, with the high definition of liquid crystal displays, quality requirements for fine dust (also referred to as particles) adhering to the surface of the glass plate are increasing. That is, fine dust becomes a foreign substance when an element such as an electrode is formed on the surface of the glass plate.
　このことから、ガラス板の面取り面（端面）から発塵する微細なカレットも、ガラス板の品質に影響を与えることが判明しており、よって、ガラス板の面取り加工技術においても更なる向上が望まれてきている。 From this, it has been found that the fine cullet generated from the chamfered surface (end surface) of the glass plate also affects the quality of the glass plate, and therefore further improvement in the chamfering processing technology of the glass plate. It has been desired.
　特許文献１、２に開示された従来の面取り装置は、ガラス板の一端面に対して砥石を２個配置し、前段の砥石にて端面を所望の面取り形状に研削し、後段の砥石にてその端面を研磨するものである。 In the conventional chamfering devices disclosed in Patent Documents 1 and 2, two grindstones are arranged on one end face of the glass plate, the end face is ground into a desired chamfered shape with the front stage grindstone, and the rear stage grindstone is used. The end face is polished.
　しかしながら、前段の砥石によって端面に発生する比較的大きなチッピング、クラック（欠け）を、後段の砥石のみで確実に研磨除去することは困難であった。すなわち、後段の砥石のみで面取り面を、カレットが発塵しない鏡面に加工することは困難であった。 However, it has been difficult to reliably remove the relatively large chipping and cracks (chips) generated on the end face by the front-stage whetstone using only the rear-stage whetstone. That is, it has been difficult to process a chamfered surface into a mirror surface from which cullet does not generate dust with only a subsequent grindstone.
　これにより、従来の面取り装置では、液晶ディスプレイの近年の高精細化に伴う仕様に面取り加工することが難しいという問題があった。 As a result, the conventional chamfering apparatus has a problem that it is difficult to chamfer the liquid crystal display to the specifications accompanying the recent high definition.
　なお、ガラス板の端面に対して粗研削加工、中研削加工、仕上げ加工、鏡面加工を順次行えるように研削能力の異なる砥石、つまり性能の異なる砥石を４台配置することも考えられる。しかしながら、この面取り装置では、砥石の増加分だけ回転装置が増加するため、装置構成が複雑になり好ましくない。 In addition, it is also conceivable to arrange four grindstones having different grinding capabilities, that is, grindstones having different performances, so that rough grinding, intermediate grinding, finishing and mirror finishing can be sequentially performed on the end face of the glass plate. However, this chamfering device is not preferable because the number of rotating devices increases by the increase in the number of grindstones, resulting in a complicated device configuration.
　本発明は、このような事情に鑑みてなされたもので、砥石の本数を増加させることなく、ガラス板の面取り品質を向上させることができるガラス板の面取り装置、ガラス板の面取り方法、及びガラス板の製造方法を提供することを目的とする。 This invention is made | formed in view of such a situation, The chamfering apparatus of the glass plate which can improve the chamfering quality of a glass plate, without increasing the number of grindstones, the chamfering method of a glass plate, and glass It aims at providing the manufacturing method of a board.
　本発明のガラス板の面取り装置は、前記目的を達成するために、
　砥石と、
　前記砥石をその中心軸を中心に回転させる回転手段と、ガラス板の端面と直交する第１の方向に沿って、前記砥石及び前記ガラス板を相対的に移動させる第１の移動手段と、
　前記ガラス板の端面の延在する第２の方向に沿って、前記砥石及び前記ガラス板を相対的に往復移動させ、前記ガラス板の同一端面を複数回研削させる第２の移動手段と、
　前記ガラス板の主面及び前記第２の方向に直交する第３の方向に沿って、前記砥石及び前記ガラス板を相対的に移動させる第３の移動手段と、
　前記第１の移動手段、第２の移動手段、及び第３の移動手段を制御する制御手段と、
　を備えることを特徴とする。 In order to achieve the above object, the glass plate chamfering apparatus of the present invention provides:
Whetstone,
Rotating means for rotating the grindstone about its central axis, and first moving means for relatively moving the grindstone and the glass plate along a first direction orthogonal to the end surface of the glass plate;
A second moving means for relatively reciprocating the grindstone and the glass plate along a second direction in which the end surface of the glass plate extends, and grinding the same end surface of the glass plate a plurality of times;
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;
It is characterized by providing.
　本発明のガラス板の面取り方法は、前記目的を達成するために、
　砥石は、上下の分割砥石部により構成されており、上下の分割砥石部のうち一方の分割砥石部を、ガラス板の一端面に押し当てた後、前記砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記した一方の分割砥石部をその中心軸を中心に回転させて前記一端面を研削する第１の研削工程と、
　前記砥石の上下の分割砥石部のうち他方の分割砥石部を前記ガラス板の前記一端面に押し当てた後、前記砥石と前記ガラス板とを、前記一端面の他方の延在方向又は一方の延在方向に相対的に移動させるとともに、前記した他方の分割砥石部をその中心軸を中心に回転させて同一の前記一端面を研削する第２の研削工程と、
　を備えることを特徴とする。 In order to achieve the above object, the glass plate chamfering method of the present invention provides:
The grindstone is composed of upper and lower divided grindstone portions. After pressing one divided grindstone portion of the upper and lower divided grindstone portions against one end surface of the glass plate, the grindstone and the glass plate are A first grinding step of grinding the one end face by rotating the one end grindstone part about its central axis while relatively moving in one extending direction of the end face;
After pressing the other divided grindstone portion of the upper and lower divided grindstone portions of the grindstone against the one end surface of the glass plate, the grindstone and the glass plate are moved to the other extending direction of the one end surface or one of the one end surfaces. A second grinding step of relatively moving in the extending direction and rotating the other divided grindstone portion around its central axis to grind the same end surface;
It is characterized by providing.
　本発明のガラス板の製造方法は、前記目的を達成するために、ガラス原料を加熱して溶融ガラスを得る溶解工程と、前記溶融ガラスを板状にしてガラスリボンを得る成形工程と、前記ガラスリボンを切断してガラス板を得る切断工程と、前記ガラス板の面取り方法により前記ガラス板を面取りする面取り工程と、を有する。 In order to achieve the above object, the method for producing a glass plate of the present invention comprises a melting step of obtaining a molten glass by heating a glass raw material, a forming step of obtaining a glass ribbon by forming the molten glass into a plate shape, and the glass A cutting step of cutting a ribbon to obtain a glass plate, and a chamfering step of chamfering the glass plate by a chamfering method of the glass plate.
　本発明のガラス板の面取り装置の一態様は、前記砥石は、少なくとも第１の砥石と第２の砥石とから構成され、前記第１の砥石及び前記第２の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高いことが好ましい。 In one aspect of the glass plate chamfering apparatus of the present invention, the grindstone is composed of at least a first grindstone and a second grindstone, and the first grindstone and the second grindstone are configured in a column shape. Thus, it is preferable that the grinding ability of one of the divided grindstone parts is higher than the grinding ability of the other divided grindstone part.
　本発明のガラス板の面取り方法の一態様は、
　砥石は、少なくとも第１の砥石と第２の砥石とから構成され、
　前記第１の砥石及び前記第２の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高くされており、
　前記第１の砥石の研削能力の高い一方の分割砥石部をガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第１の面取り工程と、
　前記第２の砥石の研削能力の高い一方の分割砥石部をガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第２の面取り工程と、
　前記第２の砥石の研削能力の低い他方の分割砥石部を前記ガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第３の面取り工程と、
　前記第１の砥石の研削能力の低い他方の分割砥石部を前記ガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第４の面取り工程と、
　を備えることが好ましい。 One aspect of the chamfering method of the glass plate of the present 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 cylindrical shape and divided into at least two divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion is divided. It is higher than the grinding ability of the other divided grindstone part,
After pressing one divided grindstone portion having a high grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are relatively opposed to one extending direction of the one end surface. A first chamfering step of grinding the one end face by rotating the first grindstone about its central axis,
After pressing one divided grindstone portion having a high grinding ability of the second grindstone against one end face of the glass plate, the second grindstone and the glass plate are relatively opposed to one extending direction of the one end face. A second chamfering step of grinding the one end face by rotating the second grindstone about its central axis,
After pressing the other divided grindstone part having a low grinding ability of the second grindstone against one end surface of the glass plate, the second grindstone and the glass plate are placed in the other extending direction of the one end surface. A third chamfering step of grinding the one end face by rotating the second grindstone around its central axis, and relatively moving the second grindstone;
After pressing the other divided grindstone portion having a low grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are placed in the other extending direction of the one end surface. A fourth chamfering step of grinding the one end face by rotating the first grindstone around its central axis while relatively moving;
It is preferable to provide.
　本発明のガラス板の面取り装置の一態様は、前記砥石は、少なくとも第１の砥石と第２の砥石とから構成され、前記第１の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された分割砥石部の研削能力よりも高く、前記第２の砥石は、円柱状に構成されて同一の研削能力を有することが好ましい。 In one aspect of the glass plate chamfering apparatus of the present invention, the grindstone is composed of at least a first grindstone and a second grindstone, and the first grindstone is formed in a column shape and has at least 2 in the axial direction. The divided grindstone portion is divided into two or more divided grindstone portions, and the grindability of one of the divided grindstone portions is higher than the grindability of the divided divided grindstone portion, and the second grindstone is configured in a cylindrical shape and is the same It is preferable to have a grinding ability of
　本発明のガラス板の面取り方法の一態様は、
　砥石は、少なくとも第１の砥石と第２の砥石とから構成され、
　前記第１の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高くされており、
　前記第２の砥石は、円柱状に構成されて同一の研削能力を有する前記砥石から構成され、
　前記第１の砥石の研削能力の高い一方の分割砥石部をガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第１の面取り工程と、
　前記第２の砥石をガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第２の面取り工程と、
　前記第２の砥石を前記ガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第３の面取り工程と、
　前記第１の砥石の研削能力の低い他方の分割砥石部を前記ガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第４の面取り工程と、
　を備えることが好ましい。 One aspect of the chamfering method of the glass plate of the present invention is:
The grindstone is composed of at least a first grindstone and a second grindstone,
The first grindstone is formed in a cylindrical shape and is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of one of the divided grindstone portions is that of the other divided grindstone portion. It is higher than the grinding ability,
The second grindstone is constituted by the grindstone having a cylindrical shape and the same grinding ability,
After pressing one divided grindstone portion having a high grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are relatively opposed to one extending direction of the one end surface. A first chamfering step of grinding the one end face by rotating the first grindstone about its central axis,
After the second grindstone is pressed against one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in one extending direction of the one end surface, and the second A second chamfering step of grinding the one end face by rotating a grindstone about its central axis;
After the second grindstone is pressed against one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extending direction of the one end surface, and the second A third chamfering step of grinding the one end face by rotating the grindstone about the central axis;
After pressing the other divided grindstone portion having a low grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are placed in the other extending direction of the one end surface. A fourth chamfering step of grinding the one end face by rotating the first grindstone around its central axis while relatively moving;
It is preferable to provide.
　本発明のガラス板の面取り装置の一態様は、前記ガラス板は矩形状であり、前記ガラス板の対向する二端面に対向して前記砥石が配置されることが好ましい。 In one aspect of the glass plate chamfering apparatus of the present invention, it is preferable that the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
　本発明のガラス板の面取り方法の一態様は、前記ガラス板は矩形状であり、前記ガラス板の対向する二端面に対向して前記砥石が配置されることが好ましい。 In one aspect of the method for chamfering a glass plate of the present invention, it is preferable that the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
　本発明の面取り装置及び面取り方法は、ガラス板の一端面に対して砥石を一方向の延在方向に相対的に往動（１Ｐａｓｓ）させて研削する第１の研削工程と、ガラス板の一端面に対して砥石を他方向の延在方向に相対的に復動（２Ｐａｓｓ）させて研削する第２の研削工程により、砥石の本数を増やすことなく、同一の一端面を複数回研削して面取り加工することを特徴とする。また、前記往動を２回繰り返す（１Ｐａｓｓから２Ｐａｓｓ）ことによっても、砥石の本数を増やすことなく、同一の一端面を面取り加工することができる。 A chamfering apparatus and a chamfering method according to the present invention include a first grinding step in which a grindstone is moved forward (1 pass) relative to one end surface of a glass plate to perform grinding, and one glass plate is ground. Grinding the same end face multiple times without increasing the number of grindstones in the second grinding process in which the grindstone is moved backward (2 Pass) relative to the end face in the other direction. It is characterized by chamfering. Also, by repeating the forward movement twice (from 1 Pass to 2 Pass), the same end face can be chamfered without increasing the number of grindstones.
　本発明の一態様における砥石によれば、円柱状に構成された砥石を軸方向に少なくとも２つ以上の分割砥石部に分割し、分割した一方の分割砥石部の研削能力を、他方の分割砥石部の研削能力よりも高くしている。すなわち、１本の砥石に複数の性能を持たせ、性能に応じて選択した砥石部をガラス板の面取り用に使用する。例えば、端面に対して第１の研削加工を行う場合には、研削能力の高い一方の分割砥石部をガラス板の端面に押し当てて研削する。次に、第２の面取り加工を行う場合には、その端面に、研削能力の低い他方の分割砥石部を押し当てて研削する。 According to the grindstone in one aspect of the present invention, the grindstone configured in the columnar shape is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion is set to the other divided grindstone. It is higher than the grinding ability of the part. That is, a single grindstone is provided with a plurality of performances, and a grindstone portion selected according to the performance is used for chamfering a glass plate. For example, when performing the 1st grinding process with respect to an end surface, it grinds by pressing one division grindstone part with high grinding capability to the end surface of a glass plate. Next, when performing the 2nd chamfering process, it grinds by pressing the other division grindstone part with low grinding ability to the end surface.
　このように本発明は、１本の砥石に２種類以上の研削能力を持たせている。よって、砥石として、少なくとも第１の砥石と第２の砥石の２本を設け、第１の砥石及び第２の砥石をそれぞれ軸方向に分割して分割砥石部を設けて、分割された一つ目の分割砥石部にて粗研削加工を行い、二つ目の分割砥石部にて中研削加工を行い、三つ目の分割砥石部にて仕上げ加工を行い、四つ目の分割砥石部にて鏡面加工を行うこともできる。また、１本の砥石に４種類の研削能力を持たせてもよい。第１の砥石を軸方向に４分割して４つの分割砥石部を設けて、分割された一つ目の分割砥石部にて粗研削加工を行い、二つ目の分割砥石部にて中研削加工を行い、三つ目の分割砥石部にて仕上げ加工を行い、四つ目の分割砥石部にて鏡面加工を行ってもよい。このようにすれば、第２の砥石は不要である。つまり、本発明の技術思想は、前段の加工によって端面に生じたチッピング、クラックを、次段の複数の加工工程にて徐々に除去し、最終の加工工程にて端面を鏡面に加工するように１本の砥石に研削能力の異なる複数の砥石を設けたことにある。 Thus, in the present invention, one grindstone has two or more kinds of grinding ability. Therefore, as the grindstone, at least two of the first grindstone and the second grindstone are provided, each of the first grindstone and the second grindstone is divided in the axial direction, and a divided grindstone portion is provided. Rough grinding is performed at the divided grindstone part of the eye, intermediate grinding is performed at the second divided grindstone part, finishing is performed at the third divided grindstone part, and the fourth divided grindstone part is formed. Mirror processing can also be performed. Moreover, you may give four types of grinding ability to one grindstone. The first grindstone is divided into four in the axial direction, four divided grindstone portions are provided, rough grinding is performed with the first divided grindstone portion, and intermediate grinding is performed with the second divided grindstone portion. Processing may be performed, finishing may be performed at the third divided grindstone, and mirror processing may be performed at the fourth divided grindstone. If it does in this way, the 2nd whetstone is unnecessary. In other words, the technical idea of the present invention is that the chipping and cracks generated on the end face by the previous stage processing are gradually removed in a plurality of subsequent process steps, and the end face is processed into a mirror surface in the final process step. One grindstone is provided with a plurality of grindstones having different grinding capabilities.
　これにより、本発明のガラス板用の砥石によれば、砥石の本数を増加させることなく、ガラス板の面取り品質を向上させることができる。 Thereby, according to the grindstone for glass plate of the present invention, the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
　なお、明細書及び特許請求の範囲に記載した「研削能力」とは、前述の如く第１の研削工程、第２の研削工程、第１の面取り工程、第２の面取り工程、第３の面取り工程、第４の面取り工程等において用いられる砥石の研削・研磨の能力、すなわち砥石の性能を意味する。砥石は、以下に示すように広義には「研削」を主とする砥石、「研磨」を主とする砥石に大別することができる。 The “grinding ability” described in the specification and claims refers to the first grinding step, the second grinding step, the first chamfering step, the second chamfering step, and the third chamfering as described above. It means the grinding / polishing ability of the grindstone used in the process, the fourth chamfering process, etc., that is, the performance of the grindstone. As shown below, the grindstone can be broadly classified into a grindstone mainly composed of “grinding” and a grindstone mainly composed of “polishing”.
　「研削」を主とする砥石とは、ダイヤモンド又はＣＢＮ（Cubic Boron Nitride：立方晶窒化ホウ素）の砥粒をメタルボンドにて固定した硬い砥石を例示できる。また、電着ダイヤモンド砥石も例示できる。これらの砥石の砥粒の粒度を変更することによって、粗研削加工及び中研削加工等の複数種類の研削加工を実施することができる。
　「研磨」を主とする砥石とは、ダイヤモンド、緑色炭化ケイ素（ＧＣ）、アルミナ（Ａｌ２Ｏ３）、軽石、又はガーネット等の砥石をブチルゴム、天然ゴム、又は樹脂等のボンドにて固定した砥石を例示できる。また、砥粒の粒度及びボンドの種類を変更することによって、仕上げ加工及び鏡面加工等の複数種類の研磨加工を実施することができる。 The grindstone mainly composed of “grinding” can be exemplified by a hard grindstone in which abrasive grains of diamond or CBN (Cubic Boron Nitride) are fixed with metal bonds. An electrodeposited diamond grindstone can also be exemplified. By changing the grain size of these grindstones, a plurality of types of grinding such as rough grinding and medium grinding can be performed.
A grindstone mainly composed of “polishing” is a grindstone such as diamond, green silicon carbide (GC), alumina (Al 2 O 3 ), pumice, or garnet fixed with a bond such as butyl rubber, natural rubber, or resin. A whetstone can be illustrated. Further, by changing the grain size of the abrasive grains and the type of bond, a plurality of types of polishing such as finishing and mirror finishing can be performed.
　更に、砥石の形状である「円柱状」とは、円盤状及び円筒状を含むものとする。また、砥石の表面にリング状の溝が形成されたもの、及び表面が平らなものも「円柱状」に含まれるものである。 Furthermore, the “columnar shape” that is the shape of the grindstone includes a disk shape and a cylindrical shape. In addition, those in which a ring-shaped groove is formed on the surface of the grindstone and those in which the surface is flat are also included in the “columnar shape”.
　従来の面取り装置では、ガラス板の一端面に対し、第２の方向に１Ｐａｓｓ（往動）で面取り加工するところを、本発明の一態様では、１Ｐａｓｓ終了後、砥石とガラス板とを第３の方向に相対的に移動させ、第２の方向に２Ｐａｓｓ（復動）させる。これにより、ガラス板の端面に第２の面取り加工（すなわち、第２の面取り工程）を行うことができる。 In the conventional chamfering apparatus, the one end surface of the glass plate is chamfered at 1 Pass (forward movement) in the second direction. In one aspect of the present invention, after the completion of 1 Pass, the grindstone and the glass plate are thirdly processed. Is moved relatively in the direction of 2 and 2 Pass (return) in the second direction. Thereby, the 2nd chamfering process (namely, 2nd chamfering process) can be performed to the end surface of a glass plate.
　本発明の一態様によれば、例えば一端面に対して砥石が２個配置された形態において、一端面に最初にあたる第１の砥石の一方の砥石を粗研削加工用の砥石とし、他方の砥石を鏡面加工用の砥石とする。そして、一端面に次に当たる第２の砥石の一方の砥石を中研削加工用の砥石とし、他方の砥石を仕上げ加工用の砥石とする。 According to one aspect of the present invention, for example, in a form in which two grindstones are arranged on one end surface, one grindstone of the first grindstone first hitting one end surface is used as a grindstone for rough grinding, and the other grindstone Is a grindstone for mirror finishing. Then, one grindstone of the second grindstone that comes into contact with one end face is used as a medium grinding grindstone, and the other grindstone is used as a finishing grindstone.
　この場合、第１の砥石の一方の砥石、及び第２の砥石の一方の砥石にて１Ｐａｓｓ加工し、この後、第２の砥石の他方の砥石、及び第１の砥石の他方の砥石にて２Ｐａｓｓ加工する。 In this case, 1 pass processing is performed with one grindstone of the first grindstone and one grindstone of the second grindstone, and then the other grindstone of the second grindstone and the other grindstone of the first grindstone. 2Pass processing.
　これにより、従来の面取り装置では、粗研削加工、仕上げ加工によって構成されていた加工工程を、本発明では、砥石の本数を増加させることなく、粗研削加工、中研削加工、仕上げ加工、鏡面仕上げ加工の４工程に構成することができる。例えば、上記したように２本の砥石により、上記４工程を行なうことができる。よって、本発明では、砥石の本数を増加させることなく、面取り品質を大幅に向上させることができる。 As a result, in the present invention, the processing steps constituted by rough grinding and finishing in the conventional chamfering apparatus can be performed in the present invention without increasing the number of grindstones, rough grinding, medium grinding, finishing, and mirror finishing. It can be configured in four processing steps. For example, as described above, the above four steps can be performed by using two grindstones. Therefore, in this invention, chamfering quality can be improved significantly, without increasing the number of grindstones.
　また、一端面に対して砥石が２個配置された形態において、一端面に最初にあたる第１の砥石の一方の砥石を粗研削加工用の砥石とし、他方の砥石を鏡面加工用の砥石とする。そして、一端面に次に当たる第２の砥石の砥石を中研削加工用の砥石とする。 Further, in a form in which two grindstones are arranged on one end face, one grindstone of the first grindstone first hitting the one end face is a grindstone for rough grinding, and the other grindstone is a grindstone for mirror finish. . Then, the grindstone of the second grindstone that comes next to one end face is used as a grindstone for medium grinding.
　この場合、第１の砥石の一方の砥石、及び第２の砥石にて１Ｐａｓｓ加工し、この後、第２の砥石、及び第１の砥石の他方の砥石にて２Ｐａｓｓ加工する。 In this case, 1 Pass processing is performed with one grindstone of the first grindstone and the second grindstone, and then 2 Pass processing is performed with the second grindstone and the other grindstone of the first grindstone.
　更に、一端面に対して砥石が２個配置された形態において、一端面に最初にあたる第１の砥石を粗研削加工用の砥石とする。そして、一端面に次に当たる第２の砥石を中研削加工用の砥石とする。 Furthermore, in the form in which two grindstones are arranged with respect to one end face, the first grindstone that first hits one end face is used as a grindstone for rough grinding. And let the 2nd grindstone which hits one end surface next be a grindstone for medium grinding.
　この場合、第１の砥石、及び第２の砥石にて１Ｐａｓｓ加工し、この後、第２の砥石にて２Ｐａｓｓ加工する。 In this case, 1 Pass processing is performed with the first grindstone and the second grindstone, and then 2 Pass processing is performed with the second grindstone.
　本発明の一態様は、前記ガラス板は、矩形状であり、前記ガラス板の対向する二端面に対向して前記砥石が配置されることが好ましい。 In one aspect of the present invention, it is preferable that the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
　本発明の一態様によれば、砥石に対してガラス板を９０度旋回させることにより、矩形状のガラス板の四端面を効率よく面取り加工することができる。 According to one aspect of the present invention, the four end surfaces of a rectangular glass plate can be efficiently chamfered by turning the glass plate 90 degrees with respect to the grindstone.
　本発明に係るガラス板の面取り装置、ガラス板の面取り方法、及びガラス板の製造方法によれば、砥石の本数を増加させることなく、ガラス板の面取り品質を向上させることができる。 According to the glass plate chamfering apparatus, the glass plate chamfering method, and the glass plate manufacturing method according to the present invention, the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
実施形態のガラス板用の砥石が適用された実施形態のガラス板の面取り装置の概略構成を示す平面図The 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. ガラス板の矢印Ａ方向の往動中における砥石の上下配置位置を示した要部拡大斜視図The principal part expansion perspective view which showed the up-and-down arrangement position of the grindstone in the forward movement of the arrow A direction of a glass plate ガラス板の矢印Ｂ方向の復動中における砥石の上下配置位置を示した要部拡大斜視図The principal part expansion perspective view which showed the up-and-down arrangement position of the grindstone in the backward movement of the arrow B direction of a glass plate 図４（Ａ）、図４（Ｂ）、図４（Ｃ）、図４（Ｄ）、図４（Ｅ）は、ガラス板の端面が各砥石によって順次面取り加工されていく状態を継時的に示した説明図4 (A), 4 (B), 4 (C), 4 (D), and 4 (E) show the state in which the end face of the glass plate is sequentially chamfered by each grindstone. Explanatory diagram shown in 図５（Ａ）、図５（Ｂ）、図５（Ｃ）、図５（Ｄ）、図５（Ｅ）は、実施形態の面取り装置による面取り方法を継時的に示した説明図5 (A), FIG. 5 (B), FIG. 5 (C), FIG. 5 (D), and FIG. 5 (E) are explanatory views showing the chamfering method by the chamfering apparatus of the embodiment continuously. 図６（Ａ）、図６（Ｂ）、図６（Ｃ）、図６（Ｄ）、図６（Ｅ）、図６（Ｆ）は、実施形態の面取り装置による他の面取り方法を継時的に示した説明図6 (A), 6 (B), 6 (C), 6 (D), 6 (E), and 6 (F) show other chamfering methods by the chamfering apparatus according to the embodiment. Explanatory diagram 図７（Ａ）、図７（Ｂ）、図７（Ｃ）、図７（Ｄ）、図７（Ｅ）は、実施形態の他の面取り方法を継時的に示した説明図FIG. 7A, FIG. 7B, FIG. 7C, FIG. 7D, and FIG. 7E are explanatory diagrams showing another chamfering method of the embodiment over time. 図８（Ａ）、図８（Ｂ）、図８（Ｃ）、図８（Ｄ）、図８（Ｅ）は、実施形態の他の面取り方法を継時的に示した説明図FIG. 8A, FIG. 8B, FIG. 8C, FIG. 8D, and FIG. 8E are explanatory diagrams that show other chamfering methods of the embodiment over time.
　以下、添付図面に従って本発明に係るガラス板の面取り装置、ガラス板の面取り方法、及びガラス板の製造方法の好ましい実施の形態を説明する。 Hereinafter, preferred embodiments of a glass plate chamfering apparatus, a glass plate chamfering method, and a glass plate manufacturing method according to the present invention will be described with reference to the accompanying drawings.
　図１は、本発明の実施形態の第１の砥石１０（以下、第１の砥石１０を単に砥石１０とも称する。）及び第２の砥石１２（以下、第２の砥石１２を単に砥石１２とも称する。）をそれぞれ一対備えた実施形態のガラス板の面取り装置１４の概略構成を示す平面図である。この面取り装置１４は、溶解工程、成形工程、切断工程、及び面取り工程を含む実施形態のガラス板の製造方法において、前記面取り工程にて使用される装置である。 FIG. 1 shows a first grindstone 10 (hereinafter, the first grindstone 10 is simply referred to as a grindstone 10) and a second grindstone 12 (hereinafter, the second grindstone 12 is simply referred to as a grindstone 12) according to an embodiment of the present invention. It is a top view which shows schematic structure of the chamfering apparatus 14 of the glass plate of embodiment provided with each pair. This chamfering device 14 is a device used in the chamfering step in the glass plate manufacturing method of the embodiment including a melting step, a molding step, a cutting step, and a chamfering step.
　また、面取り装置１４として、厚さが０．７ｍｍ以下の液晶ディスプレイ用ガラス板１６の四端面１６Ａ～１６Ｄを砥石１０、１２によって面取り加工する装置を例示する。砥石１０、１２については後述する。 Further, as the chamfering device 14, a device for chamfering the four end surfaces 16A to 16D of the glass plate 16 for liquid crystal display having a thickness of 0.7 mm or less with the grindstones 10 and 12 is illustrated. The grindstones 10 and 12 will be described later.
　なお、面取り装置１４に適用可能なガラス板としては、液晶ディスプレイ用ガラス板１６に限定されない。例えば、プラズマディスプレイ用ガラス板、ＬＥＤディスプレイ用ガラス板等の他のＦＰＤ用ガラス板でもよく、太陽電池用、照明用、建材用、ミラー用等の一般的なガラス板であってもよい。また、ガラス板の厚さも０．７ｍｍ以下に限定されず、０．７ｍｍを超える厚さであってもよい。更に、ガラス板に限定されず、金属製、又は樹脂製の板状体であっても、面取り装置１４によって端面の面取り加工が可能である。 The glass plate applicable to the chamfering device 14 is not limited to the liquid crystal display glass plate 16. For example, other glass plates for FPD such as a glass plate for plasma display and a glass plate for LED display may be used, and general glass plates for solar cells, lighting, building materials, mirrors, etc. may be used. Moreover, the thickness of a glass plate is not limited to 0.7 mm or less, The thickness exceeding 0.7 mm may be sufficient. Furthermore, it is not limited to a glass plate, and the end face can be chamfered by the chamfering device 14 even if it is a plate made of metal or resin.
　〔面取り装置１４の全体構成〕
　面取り装置１４は、矩形状のガラス板１６を吸着保持する定盤１８、及び定盤１８を水平方向（第２の方向）において矢印Ａ方向に往動（すなわち、１Ｐａｓｓ）及び矢印Ｂ方向に復動（２Ｐａｓｓ）させて同一の端面１６Ａ、１６Ｂを複数回研削させる移動装置（すなわち、第２の移動手段）２０を備える。なお、実施形態の面取り装置１４は、固定配置された砥石１０、１２に対して、ガラス板１６を往復移動させる装置であるが、砥石１０、１２とガラス板１６とを、ガラス板１６の端面１６Ａ、１６Ｂの延在方向に沿った水平方向に相対的に往復移動させる装置であればよい。 [Overall configuration of chamfering device 14]
The chamfering device 14 moves the surface plate 18 that sucks and holds the rectangular glass plate 16 and the surface plate 18 in the horizontal direction (second direction) in the direction of arrow A (that is, 1 Pass) and in the direction of arrow B. A moving device (that is, second moving means) 20 that moves (2 Pass) and grinds the same end faces 16A and 16B a plurality of times is provided. The chamfering device 14 according to the embodiment is a device that reciprocates the glass plate 16 with respect to the grindstones 10 and 12 that are fixedly arranged. However, the grindstones 10 and 12 and the glass plate 16 are connected to the end surface of the glass plate 16. Any device that reciprocally moves in the horizontal direction along the extending direction of 16A and 16B may be used.
　また、面取り装置１４は、ガラス板１６の端面１６Ａ～１６Ｄに押し当てられて面取り面を端面１６Ａ～１６Ｄに加工する円柱状の砥石１０、１２、及び砥石１０、１２を高速回転させるモータ（回転手段）２２、２４を備える。砥石１０、１２は、ガラス板１６の対向する端面１６Ａ、１６Ｂに対して２個配置されているが、３個以上配置されていてもよい。 Further, the chamfering device 14 is pressed against the end faces 16A to 16D of the glass plate 16 to rotate the chamfered surfaces into end faces 16A to 16D, and a motor (rotation) for rotating the grindstones 10 and 12 at high speed. Means) 22 and 24. Two grindstones 10 and 12 are disposed on the opposing end surfaces 16A and 16B of the glass plate 16, but three or more grindstones may be disposed.
　更に、面取り装置１４は、砥石１０、１２をモータ２２、２４とともに鉛直方向（第３の方向）に上下移動させる昇降装置（すなわち、第３の移動手段）２６、２８、砥石１０、１２による加工部に冷却液を噴射するノズル３０、３２、及び制御装置（制御手段）３４等を備える。また、砥石１０、１２をガラス板１６の端面１６Ａに水平方向に押し付けるとともに、端面１６Ａに対して水平方向に退避する方向に移動させる送り装置（すなわち、第１の移動手段）３１、３３（図２参照）を備える。なお、実施形態の面取り装置１４は、ガラス板１６に対して砥石１０、１２を昇降移動させる装置であるが、砥石１０、１２とガラス板１６とを、ガラス板１６の主面１６Ｅ（図２参照）及び水平方向に直交する鉛直方向に沿って相対的に昇降移動させる装置であればよい。また、端面１６Ａに対して砥石１０、１２を送り装置３１、３３によって進退移動させる装置に限定されず、ガラス板１６の端面１６Ａと砥石１０、１２とを相対的に進退移動させる装置であればよい。送り装置３１、３３の送り量によって研削代が設定される。また、砥石１０、１２の研削能力、性能に基づいて送り量が制御装置３４によって制御されている。 Further, the chamfering device 14 is processed by the elevating devices (that is, third moving means) 26 and 28 that move the grindstones 10 and 12 in the vertical direction (third direction) together with the motors 22 and 24 and the grindstones 10 and 12. The nozzles 30 and 32 which inject a cooling liquid to a part, the control apparatus (control means) 34, etc. are provided. Moreover, while feeding the grindstones 10 and 12 against the end surface 16A of the glass plate 16 in the horizontal direction, feeding devices (that is, first moving means) 31 and 33 (see FIG. 2). In addition, although the chamfering apparatus 14 of embodiment is an apparatus which raises / lowers the grindstones 10 and 12 with respect to the glass plate 16, the grindstones 10 and 12 and the glass plate 16 are made into the main surface 16E of the glass plate 16 (FIG. 2). And a device that relatively moves up and down along the vertical direction orthogonal to the horizontal direction. Moreover, it is not limited to the apparatus which moves the grindstones 10 and 12 forward and backward by the feeding devices 31 and 33 with respect to the end face 16A, and any apparatus that relatively moves the end face 16A of the glass plate 16 and the grindstones 10 and 12 forward and backward. Good. The grinding allowance is set according to the feed amounts of the feeding devices 31 and 33. Further, the feed amount is controlled by the control device 34 based on the grinding ability and performance of the grindstones 10 and 12.
　制御装置３４は、移動装置２０、モータ２２、２４の回転数／回転方向、昇降装置２６、２８、及び送り装置３１、３３の各動作を制御する。制御装置３４による各動作の制御方法については後述する。 The control device 34 controls the operations of the moving device 20, the rotation speed / rotation direction of the motors 22 and 24, the lifting devices 26 and 28, and the feeding devices 31 and 33. A method of controlling each operation by the control device 34 will be described later.
　図２は、ガラス板１６の矢印Ａ方向の往動中における砥石１０、１２の上下配置位置を示した要部拡大斜視図である。 FIG. 2 is an enlarged perspective view of a main part showing the vertical arrangement positions of the grindstones 10 and 12 during the forward movement of the glass plate 16 in the arrow A direction.
　図３は、ガラス板１６の矢印Ｂ方向の復動中における砥石１０、１２の上下配置位置を示した要部拡大斜視図である。 FIG. 3 is an enlarged perspective view of a main part showing the vertical positions of the grindstones 10 and 12 during the backward movement of the glass plate 16 in the direction of arrow B.
　図２、図３の如く、砥石１０は、中心軸１０Ａを中心にモータ２２によって回転駆動される。また、モータ２２が制御装置３４（図１参照）によって制御されることにより、その回転数が制御され、かつ図２の矢印Ｃと図３の矢印Ｄで示す正逆の回転方向が制御される。実施形態では、ガラス板１６が矢印Ａ方向に往動される際には、その往動方向に対向する矢印Ｃ方向に砥石１０が回転される。同様に、ガラス板１６が矢印Ｂ方向に復動される際には、その復動方向に対向する矢印Ｄ方向にその回転方向が変換される。なお、砥石１０の回転方向の変換は必須ではない。砥石の回転方向を変換しないことによって、加工時間を短縮することができる。 2 and 3, the grindstone 10 is rotationally driven by the motor 22 around the central axis 10A. Further, when the motor 22 is controlled by the control device 34 (see FIG. 1), the rotation speed is controlled, and the forward and reverse rotation directions indicated by the arrow C in FIG. 2 and the arrow D in FIG. 3 are controlled. . In the embodiment, when the glass plate 16 is moved forward in the arrow A direction, the grindstone 10 is rotated in the arrow C direction opposite to the forward movement direction. Similarly, when the glass plate 16 is moved backward in the arrow B direction, the rotation direction is converted to the arrow D direction opposite to the backward movement direction. In addition, conversion of the rotation direction of the grindstone 10 is not essential. By not changing the rotation direction of the grindstone, the processing time can be shortened.
　砥石１２も同様に、中心軸１２Ａを中心にモータ２４によって回転駆動される。また、モータ２４が制御装置３４（図１参照）によって制御されることにより、その回転数が制御され、かつ図２の矢印Ｃと図３の矢印Ｄで示す正逆の回転方向が制御される。実施形態では、ガラス板１６が矢印Ａ方向に往動される際には、その往動方向に対向する矢印Ｃ方向に砥石１２が回転される。同様に、ガラス板１６が矢印Ｂ方向に復動される際には、その復動方向に対向する矢印Ｄ方向にその回転方向が変換される。なお、砥石１２の回転方向の変換も必須ではない。 Similarly, the grindstone 12 is rotationally driven by the motor 24 around the central axis 12A. Further, when the motor 24 is controlled by the control device 34 (see FIG. 1), the rotation speed is controlled, and the forward and reverse rotation directions indicated by the arrow C in FIG. 2 and the arrow D in FIG. 3 are controlled. . In the embodiment, when the glass plate 16 is moved forward in the arrow A direction, the grindstone 12 is rotated in the arrow C direction opposite to the forward movement direction. Similarly, when the glass plate 16 is moved backward in the arrow B direction, the rotation direction is converted to the arrow D direction opposite to the backward movement direction. In addition, conversion of the rotation direction of the grindstone 12 is not essential.
　〈第１の砥石１０、第２の砥石１２の構成〉
　砥石１０は、軸方向に２つの砥石部に分割され、一方の分割砥石部（図示した例においては上部の分割砥石部３６）の研削能力が、他方の分割砥石部（図示した例においては上部の分割砥石部４２）の研削能力よりも高く設定されている。 <Configuration of the first grindstone 10 and the second grindstone 12>
The grindstone 10 is divided into two grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion (the upper divided grindstone portion 36 in the illustrated example) is higher than the other divided grindstone portion (in the illustrated example upper portion). Is set to be higher than the grinding ability of the divided grindstone portion 42).
　砥石１２も同様に、軸方向に２つの分割砥石部に分割され、一方の分割砥石部（上部の分割砥石部３８）の研削能力が、他方の分割砥石部（下部の分割砥石部４０）の研削能力よりも高く設定されている。 Similarly, the grindstone 12 is divided into two divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion (upper divided grindstone portion 38) is the same as that of the other divided grindstone portion (lower divided grindstone portion 40). It is set higher than the grinding ability.
　なお、砥石１０、１２の分割数は、２つに限定されるものではなく、３つ以上に分割してもよい。 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.
　実施形態の分割砥石部３６、３８、４０、４２は、前述したガラス板１６の往復移動によって端面１６Ａ、１６Ｂに対し、粗研削加工（すなわち、第１の面取り工程：第１の研削工程）、中研削加工（すなわち、第２の面取り工程：第１の研削工程）、仕上げ加工（すなわち、第３の面取り工程：第２の研削工程）、及び鏡面加工（すなわち、第４の面取り工程：第２の研削工程）を順次実施できるように各々の研削能力、つまり性能が設定されている。 The divided grindstone portions 36, 38, 40, and 42 of the embodiment perform rough grinding (that is, first chamfering step: first grinding step) on the end surfaces 16A and 16B by the reciprocating movement of the glass plate 16 described above. Medium grinding (ie, second chamfering step: first grinding step), finishing (ie, third chamfering step: second grinding step), and mirror finishing (ie, fourth chamfering step: first) Each grinding ability, that is, the performance is set so that the second grinding step) can be performed sequentially.
　具体的には、分割砥石部３６が粗研削加工を実施し、分割砥石部３８が中研削加工を実施し、分割砥石部４０が仕上げ加工を実施し、分割砥石部４２が鏡面加工を実施できるように性能が設定されている。 Specifically, the divided grindstone portion 36 can perform rough grinding, the divided grindstone portion 38 can perform medium grinding, the divided grindstone portion 40 can perform finish processing, and the divided grindstone portion 42 can perform mirror surface machining. The performance is set as follows.
　図４（Ａ）～図４（Ｅ）は、ガラス板１６の同一の端面１６Ａが分割砥石部３６、３８、４０、４２によって順次面取り加工されていく状態を継時的に示した説明図である。 4 (A) to 4 (E) are explanatory views showing the state in which the same end surface 16A of the glass plate 16 is sequentially chamfered by the divided grindstone portions 36, 38, 40, 42. is there.
　図４（Ａ）は、面取り加工前のガラス板１６の端面１６Ａの形状が示されている。すなわち、ガラス板１６の端面１６Ａは、面取り工程の前段の切断工程にて切断された切断面であり、主面１６Ｅに対して直交方向に形成されている。 FIG. 4 (A) shows the shape of the end face 16A of the glass plate 16 before chamfering. That is, the end surface 16A of the glass plate 16 is a cut surface that is cut in a cutting step preceding the chamfering step, and is formed in a direction orthogonal to the main surface 16E.
　図４（Ｂ）は、分割砥石部３６によって粗研削加工が実施された端面１６Ａの形状が示されており、分割砥石部３６の研削溝である断面Ｕ字状の環状溝３６Ａ（図２、図３参照）によって略Ｕ字状に研削加工されている。粗研削加工後の端面１６Ａの粗さは粗く、その表面には粗研削加工によって生じたチッピング、クラックが多発している。 FIG. 4B shows the shape of the end face 16A subjected to rough grinding by the divided grindstone portion 36, and an annular groove 36A having a U-shaped cross section (FIG. 2, FIG. 2), which is a grinding groove of the divided grindstone portion 36. (See FIG. 3). The roughness of the end face 16A after the rough grinding is rough, and chipping and cracks caused by the rough grinding are frequently generated on the surface.
　なお、図２、図３に示した分割砥石部３６の環状溝３６Ａの断面形状は、Ｕ字状に限定されず、Ｖ字状又は凹状であってもよい。また、環状溝３６Ａの本数は、１本でもよいが、分割砥石部３６の交換作業を省くため、分割砥石部３６の軸方向に所定の間隔で複数本備えることが好ましい。環状溝３６Ａが分割砥石部３６に複数本備えられているため、使用中の環状溝３６Ａが寿命になったとき、昇降装置２６によって分割砥石部３６を環状溝３６Ａのピッチ単位で軸方向に昇降させれば、分割砥石部３６の交換作業をすることなく新しい環状溝３６Ａを使用して端面１６Ａを粗研削加工することができる。 The cross-sectional shape of the annular groove 36A of the divided grindstone portion 36 shown in FIGS. 2 and 3 is not limited to a U shape, and may be a V shape or a concave shape. Further, the number of the annular grooves 36A may be one, but it is preferable to provide a plurality of annular grooves 36 at a predetermined interval in the axial direction of the divided grindstone portion 36 in order to omit the replacement work of the divided grindstone portion 36. Since the plurality of annular grooves 36A are provided in the divided grindstone portion 36, when the annular groove 36A in use reaches the end of its life, the lifting device 26 raises and lowers the divided grindstone portion 36 in the axial direction in units of the pitch of the annular grooves 36A. In this case, the end face 16A can be roughly ground using the new annular groove 36A without replacing the divided grindstone 36.
　図４（Ｃ）は、分割砥石部３８によって中研削加工が実施された端面１６Ａの形状が示されている。分割砥石部３８の表面を端面１６Ａに押し付けることにより、粗研削加工にて多発していたチッピング、クラックが殆ど研磨除去されている。 FIG. 4C shows the shape of the end face 16 </ b> A that has been subjected to medium grinding by the divided grindstone portion 38. By pressing the surface of the divided grindstone portion 38 against the end face 16A, most of the chipping and cracks frequently generated in the rough grinding process are removed by polishing.
　図４（Ｄ）は、分割砥石部４０によって仕上げ加工が実施された端面１６Ａの形状が示されている。分割砥石部４０の表面を端面１６Ａに押し付けることにより、粗研削加工にて多発していたチッピング、クラックが更に研磨除去されている。 FIG. 4 (D) shows the shape of the end face 16 </ b> A that has been finished by the divided grindstone 40. By pressing the surface of the divided grindstone portion 40 against the end face 16A, chipping and cracks frequently generated in the rough grinding process are further polished and removed.
　図４（Ｅ）は、分割砥石部４２によって仕上げ加工が実施された端面１６Ａの形状が示されている。分割砥石部４２の表面を端面１６Ａに押し付けることにより、粗研削加工にて多発していたチッピング、クラックが略完全に研磨除去され、端面１６Ａが鏡面加工されている。つまり、端面１６Ａが、端面１６Ａから発塵しないとされる鏡面に加工される。 FIG. 4 (E) shows the shape of the end face 16 </ b> A that has been finished by the divided grindstone portion 42. By pressing the surface of the divided grindstone portion 42 against the end face 16A, chipping and cracks frequently generated in the rough grinding process are almost completely polished and removed, and the end face 16A is mirror-finished. That is, the end surface 16A is processed into a mirror surface that is assumed not to generate dust from the end surface 16A.
　ここで、「研削」を主として実施する分割砥石部３６、３８としては、ダイヤモンド又はＣＢＮの砥粒をメタルボンドにて固定した硬い砥石を例示できる。また、電着ダイヤモンド砥石も例示できる。分割砥石部３６の砥粒の粒度を、例えば２７０～６００番とすることにより、分割砥石部３６によって粗研削加工を実施できる。分割砥石部３６の砥粒の粒度は、３２５～５００番とすることがより好ましい。分割砥石部３８の砥粒の粒度を、例えば４００～１０００番とすることにより、分割砥石部３８によって中研削加工を実施できる。分割砥石部３８の砥粒の粒度は、４２０～６００番とすることがより好ましい。 Here, as the divided grindstone portions 36 and 38 that mainly perform “grinding”, a hard grindstone in which abrasive grains of diamond or CBN are fixed with metal bonds can be exemplified. An electrodeposited diamond grindstone can also be exemplified. By setting the grain size of the abrasive grains of the divided grindstone 36 to, for example, 270 to 600, rough grinding can be performed by the divided grindstone 36. More preferably, the grain size of the abrasive grains of the divided grindstone 36 is 325 to 500. By setting the grain size of the abrasive grains of the divided grindstone 38 to, for example, 400 to 1000, medium grinding can be performed by the divided grindstone 38. More preferably, the grain size of the abrasive grains of the divided grindstone portion 38 is 420 to 600.
　そして、「研磨」を主として実施する分割砥石部４０、４２としては、ダイヤモンド、ＣＢＮ、緑色炭化ケイ素（ＧＣ）、アルミナ（Ａｌ２Ｏ３）、軽石、又はガーネット等の砥石をブチルゴム、天然ゴム、又は樹脂等のボンドにて固定した砥石を例示できる。また、分割砥石部４０の砥粒の粒度を、例えば２７０～８００番とし、分割砥石部４２の砥粒の粒度を、例えば６００～４０００番とすることにより、分割砥石部４０によって仕上げ加工を実施でき、分割砥石部４２によって鏡面加工を実施することができる。
　なお、分割砥石部３８は、ダイヤモンド、ＣＢＮ、緑色炭化ケイ素（ＧＣ）、アルミナ（Ａｌ２Ｏ３）、軽石、又はガーネット等の砥石をブチルゴム、天然ゴム、又は樹脂等のボンドにて固定した砥石を用いてもよく、その場合、分割砥石部３８の砥粒の粒度を、例えば４００～６００番とすることにより、中研削加工を実施することができる。 As the divided grindstone portions 40 and 42 that mainly perform “polishing”, grindstones such as diamond, CBN, green silicon carbide (GC), alumina (Al 2 O 3 ), pumice, or garnet are made of butyl rubber, natural rubber, Or the grindstone fixed with bonds, such as resin, can be illustrated. Further, by setting the grain size of the abrasive grains of the divided grindstone portion 40 to, for example, 270 to 800 and setting the grain size of abrasive grains of the divided grindstone portion 42 to, for example, 600 to 4000, finishing processing is performed by the divided grindstone portion 40. Mirror surface processing can be performed by the divided grindstone portion 42.
The divided grindstone 38 is a grindstone in which a grindstone such as diamond, CBN, green silicon carbide (GC), alumina (Al 2 O 3 ), pumice, or garnet is fixed with a bond such as butyl rubber, natural rubber, or resin. In this case, the medium grinding can be performed by setting the grain size of the abrasive grains of the divided grindstone 38 to, for example, 400-600.
　〔面取り装置１４の作用〕
　まず、図１の制御装置３４に砥石１０、１２による研削代を設定するとともに、定盤１８の往動速度、復動速度を設定する。このとき、従来の１Ｐａｓｓでの加工時間を基準として、実施形態の１Ｐａｓｓと２Ｐａｓｓ（往復）での加工時間と従来の１Ｐａｓｓ加工時間とが略等しくなるように、移動装置２０を制御する制御装置３４の動作プログラムを設定することが好ましい。このようにすれば、従来の１Ｐａｓｓでの加工と同等の時間でガラス板１６の面取り品質を向上させることができる。この場合、分割砥石部３６の砥粒の粒度は、２００～４５０番とすることが好ましく、分割砥石部３８の砥粒の粒度は、３５０～５００番とすることが好ましい。また、加工時間が短い加工を行う場合には、往動の１Ｐａｓｓ加工時間よりも、復動の２Ｐａｓｓ加工時間を短くすることが好ましい。また、仕上げ重視の加工を行う場合には、往動の１Ｐａｓｓ加工時間よりも、復動の２Ｐａｓｓ加工時間を長くすることが好ましい。なお、往動の１Ｐａｓｓ加工時間と復動の２Ｐａｓｓ加工時間とを等しい時間に設定してもよい。 [Operation of the chamfering device 14]
First, the grinding allowance by the grindstones 10 and 12 is set in the control device 34 of FIG. 1, and the forward speed and the backward speed of the surface plate 18 are set. At this time, on the basis of the conventional processing time at 1 Pass, the control device 34 for controlling the moving device 20 so that the processing time at 1 Pass and 2 Pass (reciprocating) of the embodiment and the conventional 1 Pass processing time are substantially equal. It is preferable to set the operation program. If it does in this way, the chamfering quality of the glass plate 16 can be improved in the time equivalent to the process by the conventional 1Pass. In this case, the grain size of the abrasive grains of the divided grindstone portion 36 is preferably 200 to 450, and the grain size of the abrasive grains of the divided grindstone portion 38 is preferably 350 to 500. Further, when performing machining with a short machining time, it is preferable to shorten the backward 2 Pass machining time rather than the forward 1 Pass machining time. When finishing-oriented machining is performed, it is preferable to make the backward 2 Pass machining time longer than the forward 1 Pass machining time. The forward 1 Pass machining time and the backward 2 Pass machining time may be set to be equal.
　次に、定盤１８によるガラス板１６の往動時には、端面１６Ａ、１６Ｂが分割砥石部３６、３８を通過し、復動時には端面１６Ａ、１６Ｂが分割砥石部４０、４２を通過するように、昇降装置２６、２８を制御する制御装置３４の動作プログラムを設定する。 Next, when the glass plate 16 is moved forward by the surface plate 18, the end surfaces 16A and 16B pass through the divided grindstone portions 36 and 38, and at the time of backward movement, the end surfaces 16A and 16B pass through the divided grindstone portions 40 and 42. An operation program of the control device 34 that controls the lifting devices 26 and 28 is set.
　次に、定盤１８によるガラス板１６の往動時には、砥石１０、１２が矢印Ｃ方向に回転し、復動時には砥石１０、１２が矢印Ｄ方向に回転するように、モータ２２、２４を制御する制御装置３４の動作プログラムを設定する。なお、前述の如く、砥石１０、１２の回転方向は変換することなく、一定であってもよい。 Next, the motors 22 and 24 are controlled so that the grindstones 10 and 12 rotate in the direction of the arrow C when the glass plate 16 moves forward by the surface plate 18, and the grindstones 10 and 12 rotate in the direction of the arrow D when returning. An operation program for the control device 34 is set. As described above, the rotational direction of the grindstones 10 and 12 may be constant without conversion.
　以上によって、面取り装置１４による事前設定作業が終了する。 Thus, the pre-setting work by the chamfering device 14 is completed.
　次に、切断工程にて切断されたガラス板１６を、定盤１８の上面の吸着面に吸着保持させる。この後、制御装置３４が、面取り装置１４の各部材を制御して、ガラス板１６の端面１６Ａ、１６Ｂの面取り加工を開始する。 Next, the glass plate 16 cut in the cutting step is sucked and held on the suction surface on the upper surface of the surface plate 18. Thereafter, the control device 34 controls each member of the chamfering device 14 and starts chamfering of the end surfaces 16A and 16B of the glass plate 16.
　すなわち、制御装置３４は、移動装置２０を制御してガラス板１６を、定盤１８によって図１の矢印Ａ方向に往動させる。そして、制御装置３４は、モータ２２、２４を制御して、図２の矢印Ｃ方向に砥石１０、１２を回転させる。そして、制御装置３４は、昇降装置２６、２８を制御して、端面１６Ａが分割砥石部３６、３８を通過する高さに砥石１０、１２の高さを調整する。 That is, the control device 34 controls the moving device 20 to move the glass plate 16 forward in the direction of arrow A in FIG. And the control apparatus 34 controls the motors 22 and 24, and rotates the grindstones 10 and 12 to 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 which the end surface 16A passes the division | segmentation grindstone parts 36 and 38. FIG.
　図５（Ａ）～図５（Ｅ）は、面取り装置１４による面取り方法を継時的に示した説明図である。 5 (A) to 5 (E) are explanatory views showing the chamfering method by the chamfering device 14 continuously.
　図５（Ａ）は、端面１６Ａが分割砥石部３６、３８を通過する高さに砥石１０、１２の高さが調整され、ガラス板１６が矢印Ａ方向に往動されている状態を示した概略側面図である。 FIG. 5A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end face 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved forward in the arrow A direction. It is a schematic side view.
　この後、ガラス板１６の端面１６Ａは、第１の研削工程として、図５（Ｂ）の如く継続するガラス板１６の往動により、まず、分割砥石部３６によって粗研削加工され、その後、分割砥石部３８によって中研削加工される。すなわち、第２の面取り工程が施される。 Thereafter, the end surface 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 by the forward movement of the glass plate 16 as shown in FIG. Medium grinding is performed by the grindstone 38. That is, a second chamfering process is performed.
　粗研削加工時及び中研削加工時には、砥石１０、１２と端面１６Ａとが接触する加工部に、図１のノズル３０、３２から冷却液が噴射される。これにより、前記加工部が前記冷却液によって冷却されるので、ガラス板１６の端面１６Ａに生じる焼け、欠け等の発生を低減することができる。また、ガラス板１６の２つの主面それぞれと端面１６Ａ、１６Ｂとの境界面に生じるチッピングも低減することができる。なお、冷却液としては、純水を例示できる。 At the time of rough grinding and medium grinding, coolant is sprayed from the nozzles 30 and 32 in FIG. 1 to the processing portion where the grindstones 10 and 12 and the end face 16A are in contact with each other. Thereby, since the said process part is cooled with the said cooling fluid, generation | occurrence | production of the burning, chipping, etc. which arise in the end surface 16A of the glass plate 16 can be reduced. Further, chipping generated on the boundary surfaces between the two main surfaces of the glass plate 16 and the end surfaces 16A and 16B can be reduced. An example of the coolant is pure water.
　図５（Ｃ）の如く、端面１６Ａの中研削加工が終了し、ガラス板１６が往動の終点位置に位置すると、図１の制御装置３４が移動装置２０を制御して、定盤１８の移動を一旦停止させる。 As shown in FIG. 5C, when the intermediate grinding of the end face 16A is completed and the glass plate 16 is positioned at the end position of the forward movement, the control device 34 in FIG. Stop moving.
　この後、図５（Ｃ）に示す如く、制御装置３４は、移動装置２０を制御してガラス板１６を、定盤１８によって矢印Ｂ方向に復動させる。そして、制御装置３４は、モータ２２、２４を制御して、図３の矢印Ｄ方向に砥石１０、１２を回転させる。そして、図１の制御装置３４は、昇降装置２６、２８を制御して、端面１６Ａが分割砥石部４０、４２を通過する高さに砥石１０、１２の高さを調整する。すなわち、図５（Ｃ）の矢印Ｅ方向に砥石１０、１２を上昇移動させる。 Thereafter, as shown in FIG. 5C, the control device 34 controls the moving device 20 to move the glass plate 16 backward in the direction of arrow B by the surface plate 18. And the control apparatus 34 controls the motors 22 and 24, and rotates the grindstones 10 and 12 to the arrow D direction of FIG. 1 controls the elevating devices 26 and 28 to adjust the height of the grindstones 10 and 12 to a height at which the end surface 16A passes through the divided grindstone portions 40 and 42. That is, the grindstones 10 and 12 are moved up in the direction of arrow E in FIG.
　図５（Ｄ）は、復動開始時の状態を示した概略側面図である。 FIG. 5 (D) is a schematic side view showing a state at the start of the backward movement.
　復動するガラス板１６は、図５（Ｅ）の如く、端面１６Ａが分割砥石部４０を通過することにより仕上げ加工され（すなわち、第３の面取り工程が施され）、分割砥石部４２を通過することにより鏡面加工される（すなわち、第４の面取り工程が施される。）。 As shown in FIG. 5E, the returning glass plate 16 is finished by the end face 16A passing through the divided grindstone portion 40 (that is, subjected to a third chamfering step), and passes through the divided grindstone portion 42. As a result, mirror finishing is performed (that is, a fourth chamfering step is performed).
　なお、ガラス板１６の他の対向する端面１６Ｃ、１６Ｄは、図１の砥石１０、１２の後段に配置された、同性能を有する砥石１０、１２によって面取り加工してもよい。すなわち、図１の後段に配置された図１と同機構の装置に、ガラス板１６を主面方向の垂線を軸に９０度回転させて配置し、砥石１０、１２と同性能を有する砥石によって端面１６Ｃ、１６Ｄを面取り加工してもよい。 In addition, you may chamfer the other opposing end surfaces 16C and 16D of the glass plate 16 with the grindstones 10 and 12 which are arrange | positioned in the back | latter stage of the grindstones 10 and 12 of FIG. That is, the glass plate 16 is rotated 90 degrees around the vertical line in the principal plane direction on the apparatus having the same mechanism as that in FIG. 1 disposed at the subsequent stage of FIG. 1, and the grindstone having the same performance as the grindstones 10 and 12 is used. The end faces 16C and 16D may be chamfered.
　又は、ガラス板１６を定盤１８によってＢ方向に移動させて元の位置に復帰させた後、ガラス板１６を定盤１８によって、ガラス板１６の主面方向の垂線を軸にして９０度回転させた後、定盤１８によってガラス板１６をＡ方向に移動させながら、ガラス板１６の端面１６Ａ、１６Ｂの延在方向の長さに合わせて間隔が変更されたそれぞれ一対の砥石１０、１２によって端面１６Ｃ、１６Ｄを面取り加工してもよい。 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 rotated by 90 degrees about the perpendicular in the main surface direction of the glass plate 16 by the surface plate 18. Then, while moving the glass plate 16 in the A direction by the surface plate 18, the pair of grindstones 10, 12 whose intervals are changed according to the length in the extending direction of the end surfaces 16 A, 16 B of the glass plate 16. The end faces 16C and 16D may be chamfered.
　〔第１の砥石１０、第２の砥石１２の特徴〕
　実施形態の砥石１０（砥石１２も含む）は、軸方向に少なくとも２つ以上の分割砥石部に分割され、分割砥石部３６の研削能力を、分割砥石部４２の研削能力よりも高くしている。すなわち、１本の砥石１０に複数の性能を持たせ、性能に応じて選択した砥石をガラス板１６の面取り用に使用している。 [Characteristics 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 portions in the axial direction, and the grinding ability of the divided grindstone portion 36 is higher than the grinding ability of the divided grindstone portion 42. . That is, a single grindstone 10 has a plurality of performances, and a grindstone selected according to the performance is used for chamfering the glass plate 16.
　例えば、端面１６Ａに対して第１の面取り加工を行う場合には、研削能力の高い分割砥石部３６をガラス板１６の端面１６Ａに押し当てて加工する。次に、第２の面取り加工を行う場合には、その端面１６Ａに、研削能力の低い分割砥石部４２を押し当てて加工する。 For example, when the first chamfering process is performed on the end surface 16A, the divided grindstone portion 36 having a high grinding ability is pressed against the end surface 16A of the glass plate 16 for processing. Next, when performing the 2nd chamfering process, it processes by pressing the division grindstone part 42 with low grinding ability to the end surface 16A.
　このように本発明は、１本の砥石１０に２種類以上の性能を持たせたことを特徴としている。よって、砥石として、少なくとも第１の砥石と第２の砥石の２本を設け、第１の砥石及び第２の砥石をそれぞれ軸方向に分割して分割砥石部を設けて、分割された一つ目の分割砥石部にて粗研削加工を行い、二つ目の分割砥石部にて中研削加工を行い、三つ目の分割砥石部にて仕上げ加工を行い、四つ目の分割砥石部にて鏡面加工を行うこともできる。また、１本の砥石に４種類の研削能力を持たせてもよい。第1の砥石を軸方向に４分割して４つの分割砥石部を設けて、分割された一つ目の分割砥石部にて粗研削加工を行い、二つ目の分割砥石部にて中研削加工を行い、三つ目の分割砥石部にて仕上げ加工を行い、四つ目の分割砥石部にて鏡面加工を行ってもよい。このようにすれば、第２の砥石は不要である。 Thus, the present invention is characterized in that one grindstone 10 has two or more types of performance. Therefore, as the grindstone, at least two of the first grindstone and the second grindstone are provided, each of the first grindstone and the second grindstone is divided in the axial direction, and a divided grindstone portion is provided. Rough grinding is performed at the divided grindstone part of the eye, intermediate grinding is performed at the second divided grindstone part, finishing is performed at the third divided grindstone part, and the fourth divided grindstone part is formed. Mirror processing can also be performed. Moreover, you may give four types of grinding ability to one grindstone. The first grindstone is divided into four parts in the axial direction to provide four divided grindstone parts, rough grinding is performed with the first divided grindstone part, and intermediate grinding is performed with the second divided grindstone part. Processing may be performed, finishing may be performed at the third divided grindstone, and mirror processing may be performed at the fourth divided grindstone. If it does in this way, the 2nd whetstone is unnecessary.
　これにより、本発明のガラス板用の砥石によれば、砥石の本数を増加させることなく、ガラス板の面取り品質を向上させることができる。 Thereby, according to the grindstone for glass plate of the present invention, the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
　〔面取り装置１４の特徴〕
　移動装置２０によってガラス板１６を、矢印Ａ方向に往動させながら、モータ２２によって分割砥石部３６を回転させ、分割砥石部３６をガラス板１６の端面１６Ａに押し当てる。これにより、端面１６Ａに第１の面取り加工を行うことができる（すなわち、第１の面取り工程）。次に、昇降装置２６によって砥石１０を矢印Ｅ方向（図５（Ｃ）参照）に移動させ、移動装置２０によってガラス板１６を、矢印Ｂ方向に復動させながら、分割砥石部４２を端面１６Ａに押し当てる。これにより、端面１６Ａに第２の面取り加工を行うことができる（すなわち、第２の面取り工程）。 [Characteristics of chamfering device 14]
While the moving device 20 moves the glass plate 16 in the direction of arrow A, the motor 22 rotates the divided grindstone portion 36 and presses the divided grindstone portion 36 against the end surface 16 </ b> A of the glass plate 16. Thereby, the first chamfering process can be performed on the end face 16A (that is, the first chamfering process). Next, the grindstone 10 is moved in the direction of arrow E (see FIG. 5C) by the lifting device 26 and the glass plate 16 is moved back in the direction of arrow B by the moving device 20, while the divided grindstone portion 42 is moved to the end face 16A. Press against. Thereby, the second chamfering process can be performed on the end face 16A (that is, the second chamfering process).
　ここで、従来の面取り装置と実施形態の面取り装置１４とを比較する。 Here, the conventional chamfering apparatus is compared with the chamfering apparatus 14 of the embodiment.
　従来の面取り装置は、砥石に対してガラス板１６を矢印Ａ方向に１Ｐａｓｓ（往動）させて端面１６Ａを面取り加工する装置である。 The conventional chamfering device is a device that chamfers the end surface 16A by moving the glass plate 16 by 1 Pass (forward movement) in the direction of arrow A with respect to the grindstone.
　これに対して、実施形態の面取り装置１４は、１Ｐａｓｓ終了後、砥石１０の高さを変更し、ガラス板１６を矢印Ｂ方向に２Ｐａｓｓ（すなわち、復動）させて、ガラス板１６の端面１６Ａに第２の面取り加工を行う装置である。よって、従来の面取り装置による面取り方法と、実施形態の面取り装置１４による面取り方法とは全く異なるものである。 On the other hand, the chamfering device 14 of the embodiment changes the height of the grindstone 10 after the end of 1 Pass, causes the glass plate 16 to pass 2 passes (that is, backward) in the direction of arrow B, and ends 16A of the glass plate 16. 2 is a device for performing a second chamfering process. Therefore, the chamfering method by the conventional chamfering apparatus and the chamfering method by the chamfering apparatus 14 of the embodiment are completely different.
　〔面取り方法の他の実施形態〕
　図６（Ａ）～図６（Ｆ）は、面取り装置１４による他の面取り方法を継時的に示した説明図である。 [Other Embodiments of Chamfering Method]
6 (A) to 6 (F) are explanatory views showing another chamfering method by the chamfering device 14 continuously.
　図６（Ａ）～図６（Ｆ）の如く、砥石１０には、分割砥石部３６と分割砥石部４０とが備えられ、砥石１２には、分割砥石部３８と分割砥石部４２とが備えられている。 As shown in FIGS. 6 (A) to 6 (F), the grindstone 10 includes a divided grindstone portion 36 and a divided grindstone portion 40, and the grindstone 12 includes a divided grindstone portion 38 and a divided grindstone portion 42. It has been.
　図６（Ａ）は、端面１６Ａが分割砥石部３６、３８を通過する高さに砥石１０、１２の高さが調整され、ガラス板１６が矢印Ａ方向に往動されている状態を示した概略側面図である。 FIG. 6A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end face 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved forward in the arrow A direction. It is a schematic side view.
　この後、ガラス板１６の端面１６Ａは、第１の面取り工程として、図６（Ｂ）の如く継続するガラス板１６の往動により、まず、分割砥石部３６によって粗研削加工され、その後、第２の面取り工程として、分割砥石部３８によって中研削加工される。 Thereafter, the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 by the forward movement of the glass plate 16 as shown in FIG. As the chamfering process 2, intermediate grinding is performed by the divided grindstone 38.
　図６（Ｃ）の如く、端面１６Ａの中研削加工が終了し、ガラス板１６が往動の終点位置に位置すると、図１の制御装置３４が移動装置２０を制御して、定盤１８の移動を一旦停止させる。 As shown in FIG. 6C, when the intermediate grinding of the end face 16A is completed and the glass plate 16 is positioned at the end position of the forward movement, the control device 34 of FIG. Stop moving.
　この後、制御装置３４は、送り装置３１、３３を制御して砥石１０、１２を端面１６Ａの当接位置から退避させるとともに、昇降装置２６、２８を制御して、端面１６Ａが分割砥石部４０、４２を通過する高さに砥石１０、１２の高さを調整する。すなわち、図６（Ｄ）の矢印Ｅ方向に砥石１０、１２を上昇移動させる。そして、制御装置３４は、移動装置２０を制御してガラス板１６を、定盤１８によって矢印Ｂ方向に復動させ、図６（Ｅ）の如く、ガラス板１６の復動の終点位置に位置させる。この後、制御装置３４は、送り装置３１、３３を制御して砥石１０、１２を端面１６Ａの当接位置に進出移動させる。なお、当接位置とは、砥石１０、１２の分割されたそれぞれの分割砥石部３６、３８、４０、４２に対して、砥石径、前段の研削量に応じた追加追い込み量、ボンド種による砥石の摩耗度合い、摩耗度合いに応じたガラス板１枚加工毎の追加追い込み量に基づいて設定される。そして、制御装置３４は、移動装置２０を制御してガラス板１６を、定盤１８によって矢印Ａ方向に再度往動させる。 Thereafter, the control device 34 controls the feeding devices 31 and 33 to retract the grindstones 10 and 12 from the contact position of the end surface 16A, and also controls the lifting devices 26 and 28 so that the end surface 16A has the divided grindstone portion 40. , 42 is adjusted to a height that passes through 42. That is, the grindstones 10 and 12 are moved up in the direction of arrow E in FIG. Then, the control device 34 controls the moving device 20 to move the glass plate 16 backward in the direction of arrow B by the surface plate 18, and is positioned at the end position of the backward movement of the glass plate 16 as shown in FIG. Let Thereafter, the control device 34 controls the feeding devices 31 and 33 to move the grindstones 10 and 12 forward to the contact position of the end surface 16A. The contact position refers to the grindstone diameter, the additional driving amount corresponding to the preceding grinding amount, and the grindstone depending on the bond type for each of the divided grindstone portions 36, 38, 40, 42 of the grindstone 10, 12. This is set based on the degree of wear and the amount of additional driving for each processing of one glass plate according to the degree of wear. Then, the control device 34 controls the moving device 20 to move the glass plate 16 forward again in the arrow A direction by the surface plate 18.
　図６（Ｆ）の如く、往動するガラス板１６は、端面１６Ａが分割砥石部４０を通過することにより仕上げ加工され（すなわち、第３の面取り工程が施され）、分割砥石部４２を通過することにより鏡面加工される（すなわち、第４の面取り工程が施される。）。 As shown in FIG. 6 (F), the forwardly moving glass plate 16 is finished by the end surface 16A passing through the divided grindstone portion 40 (that is, subjected to the third chamfering step) and passes through the divided grindstone portion 42. As a result, mirror finishing is performed (that is, a fourth chamfering step is performed).
　図７（Ａ）～図７（Ｅ）は、他の面取り方法を継時的に示した説明図である。 FIGS. 7A to 7E are explanatory diagrams showing other chamfering methods over time.
　図７（Ａ）～図７（Ｅ）の如く、砥石１０には、分割砥石部３６と分割砥石部４２とが備えられ、砥石１２には、同一の分割砥石部４０のみが備えられている。 As shown in FIGS. 7A to 7E, the grindstone 10 is provided with a divided grindstone portion 36 and a divided grindstone portion 42, and the grindstone 12 is provided with only the same divided grindstone portion 40. .
　図７（Ａ）は、端面１６Ａが分割砥石部３６、４０を通過する高さに砥石１０、１２の高さが調整され、ガラス板１６が矢印Ａ方向に往動されている状態を示した概略側面図である。 FIG. 7A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end surface 16A passes through the divided grindstone portions 36 and 40, and the glass plate 16 is moved forward in the arrow A direction. It is a schematic side view.
　この後、ガラス板１６の端面１６Ａは、図７（Ｂ）の如く継続するガラス板１６の往動により、まず、分割砥石部３６によって粗研削加工され（すなわち、第１の面取り工程が施され）、その後、分割砥石部４０によって仕上げ加工される（すなわち、第２の面取り工程が施される。）。この場合の分割砥石部４０の研削力は弱い。 Thereafter, the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 (ie, the first chamfering step is performed) by the continuous movement of the glass plate 16 as shown in FIG. 7B. After that, finishing is performed by the divided grindstone portion 40 (that is, a second chamfering step is performed). In this case, the grinding force of the divided grindstone 40 is weak.
　図７（Ｃ）の如く、端面１６Ａの仕上げ加工が終了し、ガラス板１６が往動の終点位置に位置すると、図１の制御装置３４が移動装置２０を制御して、定盤１８の移動を一旦停止させる。 As shown in FIG. 7C, when finishing of the end face 16A is completed and the glass plate 16 is positioned at the end position of the forward movement, the control device 34 in FIG. 1 controls the moving device 20 to move the surface plate 18. Is temporarily stopped.
　この後、制御装置３４は、昇降装置２６、２８を制御して、端面１６Ａが分割砥石部４０、４２を通過する高さに砥石１０、１２の高さを調整する。すなわち、図７（Ｃ）の矢印Ｅ方向に砥石１０、１２を上昇移動させる。そして、制御装置３４は、移動装置２０を制御してガラス板１６を、図７（Ｄ）の如く定盤１８によって矢印Ｂ方向に復動させる。 Thereafter, the control device 34 controls the elevating devices 26 and 28 to adjust 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. That is, the grindstones 10 and 12 are moved up in the direction of arrow E in FIG. Then, the control device 34 controls the moving device 20 to move the glass plate 16 back in the arrow B direction by the surface plate 18 as shown in FIG.
　図７（Ｅ）の如く、復動するガラス板１６は、端面１６Ａが分割砥石部４０を通過することにより２度目の仕上げ加工（すなわち、第３の面取り工程）が実施され、分割砥石部４２を通過することにより鏡面加工される（すなわち、第４の面取り工程が施される）。 As shown in FIG. 7E, the glass plate 16 that moves backward is subjected to the second finishing process (that is, the third chamfering step) when the end face 16A passes through the divided grindstone portion 40, and the divided grindstone portion 42 is obtained. Is mirror-finished (that is, a fourth chamfering step is performed).
　この他の面取り方法では、往動時における分割砥石部４０の研削力は弱いが、復動時にも分割砥石部４０によって研削されることから、全体として要求される粗さの面取り加工を実施できる。 In this other chamfering method, the grinding force of the divided grindstone portion 40 at the time of forward movement is weak, but since it is ground by the divided grindstone portion 40 also at the time of backward movement, it is possible to carry out chamfering with the required roughness as a whole. .
　図８（Ａ）～図８（Ｅ）は、他の面取り方法を継時的に示した説明図である。 8 (A) to 8 (E) are explanatory diagrams showing other chamfering methods over time.
　図８（Ａ）～図８（Ｅ）の如く、砥石１０には同一の分割砥石部３６のみが備えられ、砥石１２には分割砥石部３８と分割砥石部４０とが備えられている。 As shown in FIGS. 8A to 8E, the grindstone 10 includes only the same divided grindstone portion 36, and the grindstone 12 includes the divided grindstone portion 38 and the divided grindstone portion 40.
　図８（Ａ）は、端面１６Ａが分割砥石部３６、３８を通過する高さに砥石１０、１２の高さが調整され、ガラス板１６が矢印Ａ方向に往動されている状態を示した概略側面図である。 FIG. 8A shows a state in which the height of the grindstones 10 and 12 is adjusted to a height at which the end face 16A passes through the divided grindstone portions 36 and 38, and the glass plate 16 is moved forward in the direction of arrow A. It is a schematic side view.
　この後、ガラス板１６の端面１６Ａは、図８（Ｂ）の如く継続するガラス板１６の往動により、まず、分割砥石部３６によって粗研削加工され（すなわち、第１の面取り工程が施され）、その後、分割砥石部３８によって中研削加工される（すなわち、第２の面取り工程が施される。）。 Thereafter, the end face 16A of the glass plate 16 is first subjected to rough grinding by the divided grindstone portion 36 (ie, the first chamfering step is performed) by the continuous movement of the glass plate 16 as shown in FIG. 8B. After that, the grinding is performed by the divided grindstone portion 38 (that is, the second chamfering process is performed).
　図８（Ｃ）の如く、端面１６Ａの中研削加工が終了し、ガラス板１６が往動の終点位置に位置すると、図１の制御装置３４が移動装置２０を制御して、定盤１８の移動を一旦停止させる。 As shown in FIG. 8C, when the intermediate grinding of the end face 16A is completed and the glass plate 16 is positioned at the end position of the forward movement, the control device 34 in FIG. Stop moving.
　この後、制御装置３４は、送り装置３１を制御して砥石１０を端面１６Ａの当接位置から退避させるとともに、昇降装置２８を制御して、端面１６Ａが分割砥石部４０を通過する高さに砥石１２の高さを調整する。すなわち、図８（Ｃ）の矢印Ｅ方向に砥石１２を上昇移動させる。そして、制御装置３４は、移動装置２０を制御してガラス板１６を、図８（Ｄ）の如く定盤１８によって矢印Ｂ方向に復動させる。 Thereafter, the control device 34 controls the feeding device 31 to retract the grindstone 10 from the contact position of the end surface 16A and also controls the lifting device 28 so that the end surface 16A passes through the divided grindstone portion 40. The height of the grindstone 12 is adjusted. That is, the grindstone 12 is moved upward in the direction of arrow E in FIG. Then, the control device 34 controls the moving device 20 to move the glass plate 16 back in the arrow B direction by the surface plate 18 as shown in FIG.
　図８（Ｅ）の如く、復動するガラス板１６は、第３の面取り工程として、端面１６Ａが分割砥石部４０を通過することにより仕上げ加工される。 As shown in FIG. 8 (E), the returning glass plate 16 is finished by the end face 16A passing through the divided grindstone portion 40 as a third chamfering step.
　この他の面取り方法では、分割砥石部４２による鏡面加工が実施されないが、分割砥石部４０の粒度を上げることにより、鏡面加工と同等の仕上げ加工を行うことができれば、砥石１０に分割砥石部４２を備える必要はない。 In this other chamfering method, the mirror surface processing by the divided grindstone portion 42 is not performed. However, if the finishing processing equivalent to the mirror surface processing can be performed by increasing the particle size of the divided grindstone portion 40, the divided grindstone portion 42 is applied to the grindstone 10. It is not necessary to have.
　〔面取り装置１４を使用したガラス板の製造方法の特徴〕
　本発明の実施形態のガラス板の製造方法は、
　ガラス原料を加熱して溶融ガラスを得る溶解工程と、
　上記溶融ガラスを板状にしてガラスリボンを得る成形工程と、
　上記ガラスリボンを切断してガラス板を得る切断工程と、
　上記ガラス板の面取り方法によりガラス板を面取りする面取り工程と、
を有する。
　溶解工程では、所望のガラス組成となるように珪砂、その他のガラス原料を調整し、原料を溶解炉に投入し、好ましくは１４００℃～１６５０℃程度に加熱して溶融ガラスを得る。
　成形工程では、フロート法、フュージョン法などを適用して溶融ガラスを板状にしてガラスリボンを得る。例えば、フロート法では溶融ガラスを溶融金属上に流して板状にしてガラスリボンを得る。
　切断工程では、ガラスリボンを徐冷後、ガラスリボンを所定の大きさに切断し、ガラス板を得る。
　面取り方法では、上述したガラス板の面取り方法によりガラス板を面取りする。
　本発明のガラス板の製造方法によれば、面取り品質が向上したガラス板１６を製造することができる。 [Characteristics of glass plate manufacturing method using chamfering device 14]
The manufacturing method of the glass plate of the embodiment of the present invention is as follows.
A melting step of heating the glass raw material to obtain molten glass;
A molding step for obtaining a glass ribbon by making the molten glass into a plate shape,
A cutting step of cutting the glass ribbon to obtain a glass plate;
A chamfering step of chamfering the glass plate by the chamfering method of the glass plate,
Have
In the melting step, silica sand and other glass raw materials are adjusted so as to have a desired glass composition, and the raw materials are put into a melting furnace, and preferably heated to about 1400 ° C. to 1650 ° C. to obtain a molten glass.
In the molding step, a glass ribbon is obtained by applying a float method, a fusion method or the like to form a molten glass into a plate shape. For example, in the float process, molten glass is flowed on a molten metal to obtain a glass ribbon.
In the cutting step, after the glass ribbon is slowly cooled, the glass ribbon is cut into a predetermined size to obtain a glass plate.
In the chamfering method, the glass plate is chamfered by the above-described chamfering method of the glass plate.
According to the glass plate manufacturing method of the present invention, the glass plate 16 with improved chamfering quality can be manufactured.
　また、砥石の回転装置を増設する等の大掛かりな改造をすることなく、制御装置３４の動作ソフト改造のみで対応可能であり、改造に要する時間、コストを大幅に削減できる。 Also, it is possible to cope with the modification of the operation software of the control device 34 without making a major modification such as adding a grindstone rotating device, and the time and cost required for the modification can be greatly reduced.
　更に、砥石１０、１２の加工速度を上げることによって、加工タクトを変えずに、すなわち、ガラス板１６の生産性を低下させずに面取りの加工品質を向上させることができる。 Furthermore, by increasing the processing speed of the grindstones 10 and 12, it is possible to improve the chamfering processing quality without changing the processing tact, that is, without reducing the productivity of the glass plate 16.
　更にまた、他の面取り方法として、特開２００８－４９４４９号公報に開示された面取り方法に本発明の面取り方法を適用することができる。すなわち、第１の面取り砥石がガラス板の一辺において、一辺の略中央部から一辺の他方の端部まで面取りを行い、第２の面取り砥石が同一の一辺の一方の端部から、同一の一辺の略中央部まで面取りを行うことを特徴とする、前記公報に開示された面取り方法にも、本発明の面取り装置及び面取り方法を適用できる。 Furthermore, as another chamfering method, the chamfering method of the present invention can be applied to the chamfering method disclosed in Japanese Patent Laid-Open No. 2008-49449. That is, the first chamfering grindstone chamfers from approximately the center of one side to the other end of one side on one side of the glass plate, and the second chamfering grindstone from one end of the same side to the same side The chamfering apparatus and the chamfering method of the present invention can also be applied to the chamfering method disclosed in the above-mentioned publication, which is characterized in that chamfering is performed up to approximately the center of the above.
　本発明に係るガラス板の面取り装置、ガラス板の面取り方法、及びガラス板の製造方法によれば、砥石の本数を増加させることなく、ガラス板の面取り品質を向上させることができる。
　なお、２０１４年１２月１９日に出願された日本特許出願２０１４－２５７４６２号の明細書、特許請求の範囲、図面および要約書の全内容をここに引用し、本発明の開示として取り入れるものである。 According to the glass plate chamfering apparatus, the glass plate chamfering method, and the glass plate manufacturing method according to the present invention, the chamfering quality of the glass plate can be improved without increasing the number of grindstones.
The entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2014-257462 filed on Dec. 19, 2014 are incorporated herein as the disclosure of the present invention. .
　１０、１２…砥石、１４…面取り装置、１６…ガラス板、１６Ａ～１６Ｄ…端面、１８…定盤、２０…移動装置、２２、２４…モータ、２６、２８…昇降装置、３０、３２…ノズル、３１、３３…送り装置、３４…制御装置、３６、３８、４０、４２…分割砥石部。 DESCRIPTION OF SYMBOLS 10, 12 ... Grinding wheel, 14 ... Chamfering device, 16 ... Glass plate, 16A-16D ... End face, 18 ... Surface plate, 20 ... Moving device, 22, 24 ... Motor, 26, 28 ... Lifting device, 30, 32 ... Nozzle , 31, 33 ... feed device, 34 ... control device, 36, 38, 40, 42 ... divided grindstone section.

Claims (9)

  1. 　砥石と、
    　前記砥石をその中心軸を中心に回転させる回転手段と、
    　ガラス板の端面と直交する第１の方向に沿って、前記砥石及び前記ガラス板を相対的に移動させる第１の移動手段と、
    　前記ガラス板の端面の延在する第２の方向に沿って、前記砥石及び前記ガラス板を相対的に往復移動させ、前記ガラス板の同一端面を複数回研削させる第２の移動手段と、
    　前記ガラス板の主面及び前記第２の方向に直交する第３の方向に沿って、前記砥石及び前記ガラス板を相対的に移動させる第３の移動手段と、
    　前記第１の移動手段、第２の移動手段、及び第３の移動手段を制御する制御手段と、
    　を備えることを特徴とするガラス板の面取り装置。     Whetstone,
    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 an end surface of the glass plate;
    A second moving means for relatively reciprocating the grindstone and the glass plate along a second direction in which the end surface of the glass plate extends, and grinding the same end surface of the glass plate a plurality of times;
    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;
    A chamfering device for a glass plate, comprising:
  2. 　前記砥石は、少なくとも第１の砥石と第２の砥石とから構成され、
    　前記第１の砥石及び前記第２の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高い請求項１に記載のガラス板の面取り装置。     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 cylindrical shape and divided into at least two divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion is divided. The glass plate chamfering device according to claim 1, wherein the chamfering device has a higher grinding ability than the other divided grindstone.
  3. 　前記砥石は、少なくとも第１の砥石と第２の砥石とから構成され、
    　前記第１の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高く、
    　前記第２の砥石は、円柱状に構成されて同一の研削能力を有する請求項１に記載のガラス板の面取り装置。     The grindstone is composed of at least a first grindstone and a second grindstone,
    The first grindstone is formed in a cylindrical shape and is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of one of the divided grindstone portions is that of the other divided grindstone portion. Higher than grinding ability,
    The glass plate chamfering apparatus according to claim 1, wherein the second grindstone is configured in a cylindrical shape and has the same grinding ability.
  4. 　前記ガラス板は、矩形状であり、前記ガラス板の対向する二端面に対向して前記砥石が配置される請求項１、２又は３に記載のガラス板の面取り装置。 The glass plate chamfering device according to claim 1, 2 or 3, wherein the glass plate has a rectangular shape, and the grindstone is arranged to face two opposite end surfaces of the glass plate.
  5. 　砥石は、上下の分割砥石部により構成されており、上下の分割砥石部のうち一方の分割砥石部を、ガラス板の一端面に押し当てた後、前記砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記した一方の分割砥石部をその中心軸を中心に回転させて前記一端面を研削する第１の研削工程と、
    　前記砥石の上下の分割砥石部のうち他方の分割砥石部を前記ガラス板の前記一端面に押し当てた後、前記砥石と前記ガラス板とを、前記一端面の他方の延在方向又は一方の延在方向に相対的に移動させるとともに、前記した他方の分割砥石部をその中心軸を中心に回転させて同一の前記一端面を研削する第２の研削工程と、
    　を備えることを特徴とするガラス板の面取り方法。     The grindstone is composed of upper and lower divided grindstone portions. After pressing one divided grindstone portion of the upper and lower divided grindstone portions against one end surface of the glass plate, the grindstone and the glass plate are A first grinding step of grinding the one end face by rotating the one end grindstone part about its central axis while relatively moving in one extending direction of the end face;
    After pressing the other divided grindstone portion of the upper and lower divided grindstone portions of the grindstone against the one end surface of the glass plate, the grindstone and the glass plate are moved to the other extending direction of the one end surface or one of the one end surfaces. A second grinding step of relatively moving in the extending direction and rotating the other divided grindstone portion around its central axis to grind the same end surface;
    A method for chamfering a glass plate, comprising:
  6. 　砥石は、少なくとも第１の砥石と第２の砥石とから構成され、
    　前記第１の砥石及び前記第２の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高くされており、
    　前記第１の砥石の研削能力の高い一方の分割砥石部をガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第１の面取り工程と、
    　前記第２の砥石の研削能力の高い一方の分割砥石部をガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第２の面取り工程と、
    　前記第２の砥石の研削能力の低い他方の分割砥石部を前記ガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第３の面取り工程と、
    　前記第１の砥石の研削能力の低い他方の分割砥石部を前記ガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第４の面取り工程と、
    　を備えることを特徴とするガラス板の面取り方法。     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 cylindrical shape and divided into at least two divided grindstone portions in the axial direction, and the grinding ability of one divided grindstone portion is divided. It is higher than the grinding ability of the other divided grindstone part,
    After pressing one divided grindstone portion having a high grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are relatively opposed to one extending direction of the one end surface. A first chamfering step of grinding the one end face by rotating the first grindstone about its central axis,
    After pressing one divided grindstone portion having a high grinding ability of the second grindstone against one end face of the glass plate, the second grindstone and the glass plate are relatively opposed to one extending direction of the one end face. A second chamfering step of grinding the one end face by rotating the second grindstone about its central axis,
    After pressing the other divided grindstone part having a low grinding ability of the second grindstone against one end surface of the glass plate, the second grindstone and the glass plate are placed in the other extending direction of the one end surface. A third chamfering step of grinding the one end face by rotating the second grindstone around its central axis, and relatively moving the second grindstone;
    After pressing the other divided grindstone portion having a low grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are placed in the other extending direction of the one end surface. A fourth chamfering step of grinding the one end face by rotating the first grindstone around its central axis while relatively moving;
    A method for chamfering a glass plate, comprising:
  7. 　砥石は、少なくとも第１の砥石と第２の砥石とから構成され、
    　前記第１の砥石は、円柱状に構成されて軸方向に少なくとも２つ以上の分割砥石部に分割され、分割された一方の分割砥石部の研削能力は、分割された他方の分割砥石部の研削能力よりも高くされており、
    　前記第２の砥石は、円柱状に構成されて同一の研削能力を有する前記砥石から構成され、
    　前記第１の砥石の研削能力の高い一方の分割砥石部をガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第１の面取り工程と、
    　前記第２の砥石をガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の一方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第２の面取り工程と、
    　前記第２の砥石を前記ガラス板の一端面に押し当てた後、前記第２の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第２の砥石をその中心軸を中心に回転させて前記一端面を研削する第３の面取り工程と、
    　前記第１の砥石の研削能力の低い他方の分割砥石部を前記ガラス板の一端面に押し当てた後、前記第１の砥石と前記ガラス板とを、前記一端面の他方の延在方向に相対的に移動させるとともに、前記第１の砥石をその中心軸を中心に回転させて前記一端面を研削する第４の面取り工程と、
    　を備えることを特徴とするガラス板の面取り方法。     The grindstone is composed of at least a first grindstone and a second grindstone,
    The first grindstone is formed in a cylindrical shape and is divided into at least two or more divided grindstone portions in the axial direction, and the grinding ability of one of the divided grindstone portions is that of the other divided grindstone portion. It is higher than the grinding ability,
    The second grindstone is constituted by the grindstone having a cylindrical shape and the same grinding ability,
    After pressing one divided grindstone portion having a high grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are relatively opposed to one extending direction of the one end surface. A first chamfering step of grinding the one end face by rotating the first grindstone about its central axis,
    After the second grindstone is pressed against one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in one extending direction of the one end surface, and the second A second chamfering step of grinding the one end face by rotating a grindstone about its central axis;
    After the second grindstone is pressed against one end surface of the glass plate, the second grindstone and the glass plate are relatively moved in the other extending direction of the one end surface, and the second A third chamfering step of grinding the one end face by rotating the grindstone about the central axis;
    After pressing the other divided grindstone portion having a low grinding ability of the first grindstone against one end surface of the glass plate, the first grindstone and the glass plate are placed in the other extending direction of the one end surface. A fourth chamfering step of grinding the one end face by rotating the first grindstone around its central axis while relatively moving;
    A method for chamfering a glass plate, comprising:
  8. 　前記ガラス板は、矩形状であり、前記ガラス板の対向する二端面に対向して前記砥石が配置される請求項５から７のうちいずれか１項に記載のガラス板の面取り方法。 The method for chamfering a glass plate according to any one of claims 5 to 7, wherein the glass plate has a rectangular shape, and the grindstone is disposed so as to face two opposite end surfaces of the glass plate.
  9. 　ガラス原料を加熱して溶融ガラスを得る溶解工程と、
    　前記溶融ガラスを板状にしてガラスリボンを得る成形工程と、
    　前記ガラスリボンを切断してガラス板を得る切断工程と、
    　請求項５から８のうちいずれか１項に記載のガラス板の面取り方法により前記ガラス板を面取りする面取り工程と、
    を有することを特徴とするガラス板の製造方法。     A melting step of heating the glass raw material to obtain molten glass;
    A molding step for obtaining a glass ribbon by forming the molten glass into a plate shape; and
    A cutting step of cutting the glass ribbon to obtain a glass plate;
    A chamfering step of chamfering the glass plate by the chamfering method of the glass plate according to any one of claims 5 to 8,
    The manufacturing method of the glass plate characterized by having.
PCT/JP2015/085266 2014-12-19 2015-12-16 Glass plate chamfering device, glass plate chamfering method, and glass plate production method WO2016098824A1 (en)

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