WO2019054133A1 - 板ガラスの製造方法 - Google Patents

板ガラスの製造方法 Download PDF

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Publication number
WO2019054133A1
WO2019054133A1 PCT/JP2018/030678 JP2018030678W WO2019054133A1 WO 2019054133 A1 WO2019054133 A1 WO 2019054133A1 JP 2018030678 W JP2018030678 W JP 2018030678W WO 2019054133 A1 WO2019054133 A1 WO 2019054133A1
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WO
WIPO (PCT)
Prior art keywords
processing tool
processing
face
constant pressure
glass
Prior art date
Application number
PCT/JP2018/030678
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English (en)
French (fr)
Japanese (ja)
Inventor
隼人 奥
晃 粟津
久博 竹内
剛夫 谷田
Original Assignee
日本電気硝子株式会社
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Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN201880058348.2A priority Critical patent/CN111093897B/zh
Publication of WO2019054133A1 publication Critical patent/WO2019054133A1/ja

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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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
    • B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor

Definitions

  • the present invention relates to a method of manufacturing a sheet glass, including an end surface processing step of processing an end surface of the sheet glass with a processing tool.
  • Patent Document 1 discloses a processing tool for processing the end surface of the glass sheet, and a pressing force generating element for generating a pressing force by urging the processing tool toward the end surface of the glass sheet as a technique for processing the end surface of the glass sheet by constant pressure.
  • a sheet glass processing apparatus is disclosed which comprises: measuring means for measuring the position of a processing tool.
  • the processing tool includes a grindstone and an arm member supporting the grindstone.
  • the pressing force generating element applies a force to the arm member of the processing tool, and urges the processing tool against the end surface of the glass sheet to generate a pressing force.
  • the sheet glass processing apparatus processes the end face of the sheet glass at high speed with high accuracy by controlling the pressing force generating element so that the pressing force becomes constant.
  • abnormal asperities which are difficult to remove by the processing tool for end face processing may occur.
  • the abnormal asperities include, for example, protrusions and defects such as cracks and chips. These abnormal irregularities are generated during the cutting process (for example, the breaking process) and the end face processing.
  • the processing tool When abnormal asperity exists on the end face of the plate glass, the processing tool may be damaged by coming into contact with the abnormal asperity, or when the processing tool is a grinding stone, it may cause clogging of the grinding stone. In addition, there is a possibility that the sheet glass may be broken and damaged by pressing the processing tool against the abnormal asperity. If the glass sheet breaks during end face processing, the production line is shut down to remove debris, which reduces productivity. Therefore, it is desirable to detect the presence or absence of abnormal unevenness on the end face of the sheet glass.
  • This invention is made in view of said situation, and it aims at providing the manufacturing method of the plate glass which can detect the abnormal unevenness
  • the present invention is to solve the above-mentioned problems, and comprises an end face processing step of processing an end face of a plate glass with one or more processing tools, wherein the processing tool contacts the end faces with a constant pressure.
  • the presence of the abnormal asperity can be detected by detecting the change in the position information when the constant pressure type working tool contacts the abnormal asperity by the position control of the constant pressure type working tool by the control device. According to this method, since the abnormal asperity can be detected during the end face processing step, it is possible to take an appropriate measure to prevent the breakage of the processing tool.
  • the control device when the position information of the constant pressure type processing tool exceeds a predetermined threshold, can specify that the abnormal asperity is a protrusion protruding from the end surface. . Further, the control device can specify that the abnormal asperity is a chip or a crack formed on the end face when the position information of the constant pressure type processing tool exceeds a predetermined threshold.
  • the constant pressure processing tool is configured to be capable of approaching and separating from the end surface, and the control device detects the constant pressure processing tool as the end surface when the abnormal asperity is detected. It is desirable to carry out control away from As a result, damage to the processing tool or damage to the plate glass due to abnormal irregularities can be reduced.
  • the end face processing step the end face is processed with a plurality of processing tools, the processing tool includes a plurality of constant pressure processing tools, and the control device is a part of the plurality of constant pressure processing tools
  • the control device is a part of the plurality of constant pressure processing tools
  • FIG. 1 thru
  • the plate glass G manufactured by this method has rectangular plate shape, it is not limited to this shape.
  • the thickness of the sheet glass G is, for example, 0.05 mm to 10 mm, but is not limited to this range, and is appropriately set according to the conditions such as the material and size of the sheet glass G.
  • the plate glass G has a rectangular plate shape, and has opposing end faces ES.
  • the non-alkali glass is a glass substantially not containing an alkali component (alkali metal oxide), and specifically, a glass having a weight ratio of an alkali component of 3000 ppm or less is there.
  • the weight ratio of the alkali component in the present invention is preferably 1000 ppm or less, more preferably 500 ppm or less, and most preferably 300 ppm or less.
  • FIG. 1 illustrates a glass sheet processing apparatus used in the method.
  • the plate glass processing apparatus 1 includes a processing tool 2, a pressing force generating element 3, a measuring unit 4, and a control device 5.
  • the processing tool 2 is a rotary tool that processes the end surface ES of the sheet glass G from a processing start end C1 that is one end to a processing end C2 that is the other end.
  • the processing tool 2 performs grinding and / or polishing on the end surface ES of the sheet glass G.
  • the processing tool 2 may chamfer the end surface ES of the plate glass G.
  • the processing tool 2 is provided so as to be movable relative to the sheet glass G along the end surface ES of the sheet glass G.
  • the processing tool 2 performs processing while moving along the moving direction F with respect to the end surface ES of the stopped sheet glass G, but the present invention is not limited thereto.
  • the processing tool 2 in a fixed position may perform processing on the end surface ES of the plate glass G moving in the direction.
  • the processing tool 2 has a grindstone 6 and an arm member 7 for supporting the grindstone 6.
  • the grindstone 6 is a cylindrical or frusto-conical disk member which grinds the end surface ES of the plate glass G while rotating.
  • the grindstone 6 is rotationally driven by a drive motor.
  • the drive motor is connected to the controller 5.
  • a grindstone for grinding processing for example, an electrodeposition grindstone formed by solidifying diamond abrasive grains by electrodeposition bonding of metal, or a metal bond grindstone formed by solidifying abrasive grains with a metallic binder is suitably used.
  • a resin bond grindstone obtained by mixing diamond abrasive grains with a binder such as a resin bond containing a curable resin as a main component, and firing the mixture is preferably used.
  • the grindstone 6 is supported by the arm member 7 so that the disk surface 6A is parallel to the main surface Ga of the plate glass G.
  • the invention is not limited thereto, and the grindstone 6 may be supported by the arm member 7 so that the disc surface 6A intersects with the main surface Ga of the plate glass G.
  • the arm member 7 is pivotally supported at one end, and rotatably supports the grindstone 6 at the other end.
  • the arm member 7 causes the grindstone 6 to approach the end face ES of the plate glass G or separate from the end face ES by the rotation operation.
  • the arm member 7 has a curved shape in which the ends of the two members 7a and 7b are connected.
  • the present invention is not limited to this, and the arm member 7 may be configured as an integral member and have a linear shape.
  • the processing tool 2 is controlled to move to two positions of the reference position and the standby position.
  • the reference position is an arrangement position of the processing tool 2 which is predetermined so that the grindstone 6 and the end surface ES can be in contact when the plate glass G is processed normally.
  • the standby position is an arrangement position where the processing tool 2 that has been processed stands by at a distance from the sheet glass G.
  • the glass sheet processing apparatus 1 may further include an arm position control unit 8.
  • the arm position control unit 8 controls the position of the arm member 7 so that the processing tool 2 moves to two positions, the standby position and the reference position. While moving from the standby position to the reference position, while moving from the reference position to the standby position, and at the standby position, the arm member 7 is locked by the control of the arm position control unit 8 and does not move freely. . On the other hand, when positioned at the reference position, the control by the arm position control unit 8 does not work and the lock is removed, and the arm member 7 is arm free.
  • the pressing force generating element 3 biases the processing tool 2 to the end surface ES of the plate glass G to generate pressing force.
  • the pressing force generating element 3 biases the processing tool 2 to the end surface ES of the glass sheet G by giving a force to the arm member 7.
  • the pressing force generating element 3 gives a force to the arm member 7 at the timing when the end face ES of the plate glass G comes in contact with the grindstone 6 of the processing tool 2 moved to the reference position. In the reference position, since the arm member 7 is arm free, the processing tool 2 is biased to the end surface ES by the couple.
  • the pressing force generating element 3 may be a low sliding resistance air cylinder.
  • a diaphragm cylinder can be used as a low sliding resistance air cylinder in consideration of high-speed response due to low sliding property and long life due to piston-less.
  • the pressing force generating element 3 is not limited to the air cylinder, but may be a hydraulic cylinder or other known driving device, or a member capable of generating pressing force such as a spring or a weight.
  • the pressing force generating element 3 is provided with a servo mechanism, and the processing tool 2 is a constant pressure type working tool that is feedback-controlled by the pressing force generating element 3 so that the pressing force on the plate glass G becomes constant. Since such a constant pressure type processing tool follows the waviness of the end surface ES of the plate glass G, the end surface ES of the plate glass G can be processed with a substantially constant cutting amount.
  • the above processing tool 2 is integrated with the pressing force generating element 3, the measurement unit 4, and the arm position control unit 8 to configure a processing unit U.
  • the processing unit U is configured to be movable by the movement mechanism. That is, the processing unit U moves the processing tool 2 along the moving direction F or moves the processing tool 2 in the direction P orthogonal to the moving direction F via the moving mechanism.
  • the measuring unit 4 measures a change in the distance between the processing tool 2 and the measuring unit 4.
  • the measurement unit 4 is, for example, a displacement sensor such as an optical sensor, an eddy current sensor, or an ultrasonic sensor.
  • an eddy current displacement sensor is used as the measurement unit 4.
  • the measuring unit 4 is disposed on the same side as the pressing force generating element 3 and the arm position control unit 8 with respect to the arm member 7 and at a position separated from the arm member 7 by a predetermined distance. Then, the measuring unit 4 measures the distance from the measuring unit 4 to the arm member 7 as position information of the processing tool 2.
  • the measurement unit 4 is connected to the control device 5 and transmits the measured data to the control device 5.
  • the control device 5 includes, for example, a computer (for example, a PC) mounting various hardware such as a CPU, a ROM, a RAM, an HDD, and an input / output interface.
  • the control device 5 includes an arithmetic processing unit 9 that executes various calculations, and a storage unit 10 that stores data necessary for processing the plate glass G and various programs.
  • the control device 5 is connected to the display device 11 and causes the display device 11 to display information related to processing of the plate glass G. Further, the control device 5 is connected to a drive motor for rotating the grinding wheel 6 of the processing tool 2 and executes control of the drive motor.
  • the control device 5 causes the arithmetic processing unit 9 to execute various data and various programs stored in the storage unit 10, and executes programs necessary for controlling the pressing force generating element 3 and the processing unit U.
  • the control device 5 causes the display device 11 to display the position information (numerical value) of the processing tool 2 received from the measurement unit 4.
  • the arithmetic processing unit 9 includes a determination unit 12 that determines whether the position of the grinding wheel 6 in the processing tool 2 is appropriate.
  • the determination unit 12 determines, based on the predetermined thresholds TH1 and TH2 and the position information of the processing tool 2, whether or not the abnormal asperities UD1 and UD2 exist on the end surface ES of the plate glass G.
  • the storage unit 10 stores, in addition to the position information acquired by the measurement unit 4, various programs for controlling the pressing force generating element 3, the arm position control unit 8, the moving mechanism of the processing unit U, and the like.
  • the method of manufacturing the sheet glass G mainly includes a cutting step and an end face processing step. If necessary, a cleaning step is provided as a post-step of the end face processing step.
  • molding methods can be used for plate glass MG supplied to a cutting process.
  • various known forming methods for example, a float method, a roll out method, an overflow down draw method, a slot down draw method, a redraw method or the like can be adopted.
  • the overflow down draw method for example, molten glass is poured into an overflow groove provided in the upper part of a compact having a substantially wedge-shaped cross section, and molten glass overflowing from the overflow groove on both sides While flowing down along the side wall, the lower end of the formed body is fused and integrated to continuously form a glass ribbon.
  • the formed glass ribbon is gradually cooled by a slow cooling furnace to remove its distortion, the glass ribbon is cooled.
  • the cooled glass ribbon is cut at a predetermined length, and both ends in the width direction are removed by cutting. Thereby, the plate glass MG is obtained.
  • the glass sheet MG supplied to the cutting step is cut into a glass sheet of a desired size by cutting.
  • one or more sheet glasses are cut out from the sheet glass MG.
  • the plate glass G used as the process target of the plate glass processing apparatus 1 is obtained.
  • Cutting of the glass sheet MG is performed by, for example, scribing.
  • the scribing wheel SH is caused to travel along the planned cutting line CL of the large glass sheet MG. Thereby, a scribe line having a predetermined depth is formed on the glass sheet MG along the planned cutting line CL. Thereafter, a bending moment is applied to the periphery of the scribe line, and the glass sheet MG is broken along the scribe line. A plurality of plate glasses G are obtained by this breaking.
  • the end face processing step includes a step of grinding the end face ES of the plate glass G (grinding step) and a step of grinding the end face ES after the grinding step (grinding step).
  • the sheet glass G configured through the cutting step is conveyed to the processing position in the end face processing step by a conveyer (conveyor) not shown. After the conveyor is disposed at the processing position on the sheet glass G, it is temporarily stopped until the end surface processing is completed. Moreover, the plate glass G arrange
  • the processing unit U starts to move along the moving direction F.
  • the processing tool 2 moves from the standby position to the reference position under the control of the arm position control unit 8.
  • the pressing force generating element 3 biases the arm member 7 at the timing when the grindstone 6 of the processing tool 2 contacts the processing start end C1.
  • the grindstone 6 contacts the end surface ES of the glass sheet G with a constant pressing force by the operation of the servo mechanism in the pressing force generating element 3.
  • the processing tool 2 performs grinding processing or the like on the end surface ES from the processing start end C1 to the processing end portion C2.
  • the pressing force generating element 3 keeps urging the arm member 7.
  • the pressing force generating element 3 stops urging at the timing when the grindstone 6 separates from the end face ES of the plate glass G, and the processing tool 2 returns to the standby position by the control of the arm position control unit 8.
  • the processing tool 2 may move so as to process a part of the end face ES of the plate glass G.
  • the platen releases the holding of the sheet glass G, and the conveyor conveys the sheet glass G to the next step.
  • the abnormal asperities UD1 and UD2 which are difficult to remove by the processing of the processing tool 2 exist in the end face ES of the sheet glass G, the measuring part 4 and the determination part 12 of the control device 5
  • the irregularities UD1 and UD2 are detected.
  • the abnormal asperities UD1 and UD2 of the plate glass G are, for example, chips or cracks UD1 having a depth largely exceeding the processing allowance of the processing tool 2, or the projection UD2 which is difficult to remove by the processing tool 2 is there.
  • the chipping / cracking UD1 has, for example, a depth D of 0.4 mm or more and a length L of 100 mm or more.
  • the height H of the protrusion UD2 is 0.4 mm or more, and the length L thereof is 1 mm or more.
  • FIG.3 and FIG.4 shows the process example in case the chipping and crack UD1 as abnormal unevenness exist in the end surface ES of the one side of the plate glass G.
  • FIG. The notch UD1 is a recess that is recessed from the end surface ES of the plate glass G to the inside of the plate glass G, as indicated by a solid line in FIG. 3.
  • the crack UD1 is a crack formed in the width direction of the sheet glass G, as shown by a two-dot chain line in FIG. 3, with the end face ES of the sheet glass G as a base point.
  • the determination unit 12 of the control device 5 relates to the target position RP (the position indicated by an alternate long and short dash line) and the position relating to the processing tool 2 with reference to the target position RP.
  • Threshold values TH1 and TH2 are set.
  • the target position RP is set to maintain the processing tool 2 at the reference position.
  • Each threshold TH1, TH2 includes a positive (+) threshold TH1 and a negative (-) threshold TH2.
  • the positive threshold value TH1 is set to detect a chip or crack UD1 as an abnormal asperity.
  • the negative threshold value TH2 is set to detect the projection UD2 as the abnormal asperity.
  • the threshold values TH1 and TH2 are not limited to the above, and for example, a negative threshold value may be set to detect a chip or crack UD1, and a positive threshold value may be set to detect a protrusion UD2. .
  • the above threshold values TH1 and TH2 can be appropriately set based on, for example, the required quality of the sheet glass G, the ease of damage to the processing tool 2, the ease of breakage of the sheet glass, and the like.
  • the thresholds TH1 and TH2 can be set, for example, at a position of 0.4 to 10 mm from the target position RP (reference position) of the processing tool 2.
  • the determination unit 12 of the control device 5 detects the chipping / breaking UD1 as abnormal asperity.
  • the determination unit 12 detects the projection UD2 as the abnormal asperity.
  • the chipping tool UD1 enters the chipping / breaking UD1 while maintaining the contact with the chipping / breaking UD1.
  • the arm position control unit 8 operates the arm member 7 to move the processing tool 2 to a position away from the end surface ES (see the position of the processing tool 2 indicated by a two-dot chain line in FIG. 4).
  • the control device 5 temporarily stops the processing unit U.
  • the processing tool 2 does not operate the arm member 7 by the control device 5 and the arm position control unit 8 (retraction operation of the processing tool 2), or in addition to this operation
  • the processing unit U may be paused.
  • the operator confirms the position and shape of the chipping / breaking UD1 in the sheet glass G.
  • FIG.5 and FIG.6 shows the process example in case the projection part UD2 as abnormal unevenness exists in the end surface ES of the one side of the plate glass G.
  • the processing tool 2 changes its position by trying to climb over the protrusion UD2. Specifically, the processing tool 2 moves away from the end surface ES of the glass sheet G when passing through the protrusion UD2.
  • the movement distance exceeds the negative threshold TH2 set in the determination unit 12, that is, when the numerical value (position information) of the negative position on the processing tool 2 becomes smaller than the negative threshold TH2 (one-dot chain line in FIG. 6)
  • the determination unit 12 detects the presence of the protrusion UD2).
  • the control device 5 When the protrusion UD2 is detected, the control device 5 operates the arm member 7 to move the processing tool 2 away from the end surface ES (see the position of the processing tool 2 indicated by the two-dot chain line in FIG. 6) , And temporarily stop the processing unit U.
  • the processing unit U is moved away from the end surface ES of the glass sheet G without or in addition to the operation of the arm member 7 by the control device 5 (retraction operation of the processing tool 2). After that, the processing unit U may be paused.
  • the end surface ES of the plate glass G is processed by several pairs of process tools 2a and 2b.
  • two parallel sides (long sides) of the rectangular sheet glass G are processed by two pairs of processing tools 2a and 2b.
  • each end surface ES of the sheet glass G is processed by a pair of processing tools, that is, the first processing tool 2a and the second processing tool 2b.
  • the grindstone 6a of the first processing tool 2a is used for grinding
  • the grindstone 6b of the second processing tool 2b is used for grinding.
  • Each processing tool 2a, 2b is configured as a separate processing unit U, and independently processes the end surface ES of the sheet glass G, but each processing tool 2a, 2b is connected to a common control device 5, The end face processing can be performed in conjunction with the
  • the control device 5 separates the processing tools 2a and 2b from the end surface ES of the sheet glass G and temporarily stops the processing tools 2a and 2b as indicated by a two-dot chain line.
  • the second addition following the first processing tool 2a By moving the tool 2b away from the end face ES and temporarily stopping it, the second processing tool 2b can be reliably protected without coming into contact with the chipping / cracking UD1.
  • the control device 5 separates the first processing tool 2a and the second processing tool 2b from the end surface ES of the sheet glass G and temporarily stops them.
  • the end face ES of the sheet glass G is processed using the fixed type and constant pressure type processing tools 2a to 2c in combination.
  • the processing tools 2a to 2c are a first processing tool 2a having a fixed grinding stone 6a, a second processing tool 2b having a constant pressure grinding stone 6b, and a constant pressure grinding stone 6c. And a third processing tool 2c.
  • the arm member 7 rotatably supporting the first processing tool 2a is fixed so as not to be rotatable. That is, in the first processing tool 2a, unlike the second processing tool 2b and the third processing tool 2c, feedback control of the pressing force by the pressing force generating element 3 is not executed. For this reason, since the fixed first processing tool 2a basically does not follow the waviness of the end surface ES of the plate glass G, the cut amount of the first processing tool 2a changes according to the waviness.
  • the fixed first processing tool 2a does not detect the chipping / cracking UD1, and the chipping Pass through the crack UD1. Thereafter, when the second processing tool 2b reaches the chipping / breaking UD1 and moves beyond the positive threshold TH1, the determination unit 12 detects the presence of the chipping / breaking UD1.
  • Control device 5 separates processing unit U concerning the 2nd processing tool 2b and the 3rd processing tool 2c from end face ES of sheet glass G, and makes it stop temporarily.
  • the fixed first processing tool 2a passes through the protrusion UD2. At this time, a part of the protrusion UD2 is scraped off by the first processing tool 2a. Thereafter, when the second processing tool 2b contacts the protrusion UD2 and moves beyond the negative threshold TH2, the determination unit 12 detects the presence of the protrusion UD2.
  • the control device 5 separates the second processing tool 2b and the third processing tool 2c from the end surface ES of the sheet glass G, and temporarily stops them.
  • the value of the position of the processing tool 2 exceeds threshold value TH1, TH2 by monitoring the position of the processing tool 2 by the measurement part 4 and the control apparatus 5.
  • TH1, TH2 threshold value
  • the abnormal asperities UD1 and UD2 can be detected during the end face processing step, it is possible to take an appropriate measure to prevent the breakage of the processing tool 2 or the like.
  • the end surface ES of the sheet glass G is processed by the pair of grinding processing tools 2a and the pair of polishing processing tools 2b, but the present invention is not limited to this.
  • the end surface ES may be processed by the processing tool 2a and two or more pairs of polishing processing tools 2b.
  • the present invention is not limited thereto.
  • the end face ES may be processed by the fixed processing tool 2a and the constant pressure processing tools 2b and 2c.
  • the total logarithm of the fixed processing tool 2a and the constant pressure processing tools 2b and 2c is preferably 6 pairs or less from the viewpoint of preventing the increase in the manufacturing cost and the equipment cost.
  • or 12 processed both opposing end surface ES of the sheet glass G by the processing tool which makes a pair
  • the end surface ES which opposes only by one side of a processing tool which makes a pair Only one of them may be processed.
  • the processing example of FIGS. 3 to 6 only one end face ES may be processed by one processing tool 2.
  • only one end face ES may be processed by two processing tools 2.
  • the present invention is not limited to this composition.
  • a link mechanism and a servomotor are connected to the arm member 7 and the rotational force of the drive shaft of the servomotor is converted into a couple of forces of the arm member 7 through the link mechanism. It may be In this case, the position information of the processing tool 2 may be calculated based on the rotation angle of the servomotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Surface Treatment Of Glass (AREA)
PCT/JP2018/030678 2017-09-12 2018-08-20 板ガラスの製造方法 WO2019054133A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880058348.2A CN111093897B (zh) 2017-09-12 2018-08-20 板状玻璃的制造方法

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Application Number Priority Date Filing Date Title
JP2017174692A JP6978724B2 (ja) 2017-09-12 2017-09-12 板ガラスの製造方法
JP2017-174692 2017-09-12

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WO2019054133A1 true WO2019054133A1 (ja) 2019-03-21

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